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    • 专利摘要:
    A method of manufacturing a pre-insulated conduit, comprising inserting an end casing conduit into a guide channel having a front end and a rear end; securing the end casing in the guide channel; providing a first end of an end-insulated internal tubing, the end of insulated internal tubing comprising an end of internal tubing surrounded by at least one layer of compressible insulating material; inserting, at the front end of the guide channel, into the end casing, the first end of the insulated internal pipeline; applying overpressure at least in an interior of the end casing; internal pipeline insulated around the inserted first end of the end; and moving the first end of the insulated internal tubing toward the rear end of the conduction channel, the overpressure being such that the at least one layer of insulating material is radially compressed; releasing the overpressure to secure the end insulated internal piping in the end casing to form a pre-insulated conduit.
    公开号:BE1023335B1
    申请号:E2016/5144
    申请日:2016-03-01
    公开日:2017-02-07
    发明作者:Marc Wouters
    申请人:WATTS Water TECHNOLOGIES Inc.；
    IPC主号:
    专利说明:

    Method and system for manufacturing a pre-insulated pipe and pre-insulated pipe
    Domain of the invention
    The domain of the invention relates to a method and system for manufacturing a pre-insulated pipe, and to a pre-insulated pipe obtained by such a method. Special embodiments relate to a method and system for manufacturing a pre-insulated pipe for heating, sanitary and cooling applications.
    Background
    It is known to provide an insulated internal pipeline in a rigid jacket conduit to obtain a pre-insulated conduit.
    Various pull-through methods exist in which a pre-insulated pipe is provided to pass through in a jacket pipe. However, the known methods can only be applied to pipes with a limited length.
    Other methods use co-extrusion of the jacket pipe on the insulated internal pipeline. Such methods have the disadvantage that they result in pre-insulated pipes that have a limited bending radius.
    Summary
    The purpose of embodiments of the invention is to provide an improved method and system for the manufacture of a pre-insulated pipe, which permits the production of long, flexible pre-insulated pipes.
    According to a first aspect of the invention, a method is provided for manufacturing a pre-insulated pipe. The method comprises introducing an end casing conduit into a guide channel with a front end and a rear end; attaching the end casing conduit in the guide channel; providing a first end with an end insulated internal pipeline, which end insulated internal pipeline comprises an end internal pipeline surrounded by at least one layer of insulating material; inserting, at the front end of the guide channel, into the end casing line, of the first end of the end insulated internal pipeline; applying an overpressure at least around the inserted first end of the end insulated internal pipeline, into an interior of the end casing; moving the first end of the insulated internal pipeline to the rear end of the guide channel; and releasing the excess pressure to attach the end insulated internal pipeline to the end casing to form a pre-insulated conduit. The overpressure is such that at least one layer of insulation material is compressed radially.
    According to a second aspect, a system is provided for manufacturing a pre-insulated pipe, comprising a guide channel, a fastening member, a pressure generating member and a displacement member. The guide channel is adapted to receive an end casing line, and has a front end and a rear end. The fixing member is adapted for fixing the end of the casing line in the guide channel. The pressure generating means is adapted to exert an overpressure at least in an interior of the end casing line when, at the front end of the guide channel, a first end of an end insulated internal pipeline is introduced into the end casing line. The end insulated internal pipeline comprises an end internal pipeline surrounded by at least one layer of insulating material. The displacement member is adapted for displacing the first end to the rear end of the guide channel.
    According to a third aspect, a pre-insulated pipe is provided, in particular a pre-insulated pipe manufactured according to the method of the invention, comprising an insulated internal pipeline surrounded by a casing pipe. The insulated internal pipeline comprises an end internal pipeline surrounded by at least one layer of insulating material. The insulation material is compressed radially elastically and is in contact with the cable conduit.
    Embodiments are inter alia based on the inventive insight that by displacing the internal conduit in the casing while exerting an overpressure to compress the insulating material around the internal conduit, and by securing the casing conduit in a conduit channel, the insulated internal pipeline becomes easier can be moved, and damage to the insulation material can be prevented. In this way long lengths of the pre-insulated pipe of 70 m and more become possible. Moreover, the method can be easily adapted for pipes with different diameters and thicknesses, and for different types of insulation material. The process can also be interrupted without affecting the quality of the pre-insulated pipe manufactured.
    According to an exemplary embodiment, the jacket conduit has a smooth inner surface and a ribbed outer surface. Preferably, the casing line is a double-walled line, with a ribbed outer wall, and a flat inner wall, viewed in an axial direction. This allows the pre-insulated conduit to have a small bending radius, since the insulating material can slide over the smooth inner surface of the casing conduit during bending.
    According to an exemplary embodiment, the pre-insulated pipe has a length that is longer than 50 m, preferably 70 m longer.
    According to an exemplary embodiment, the insulated internal pipeline comprises at least two internal pipes contained in a core, the at least one layer of insulation material surrounding the core.
    According to an exemplary embodiment, the insulated internal pipeline comprises a cable extending axially adjacent to the internal conduit, the internal conduit with the cable being surrounded by the at least one layer of insulating material.
    According to an exemplary embodiment, the pre-insulated pipe has one or more of the following features: the jacket pipe has an outer diameter between 50 and 250 mm; the internal pipe has an outside diameter between 20 and 125 mm; the internal pipe has a wall thickness between 1 and 10 mm; the at least one layer of insulation material has a thickness between 10 and 70 mm; the insulation material has a lambda value lower than 0.050 W / mK; the jacket pipe, the internal pipe and the at least one insulation layer have a length of more than 50 m.
    According to an exemplary embodiment, the insulating material is a microcellular foam, for example a microcellular polyethylene foam. The insulating material is preferably arranged around the internal pipe in the form of layer material.
    According to an exemplary embodiment of the method, the guide channel is a pipe-shaped channel, and the overpressure is also exerted in the guide channel, outside the end casing line. By applying overpressure both inside and outside the jacket pipe, it is prevented that the jacket pipe, typically a rigid pipe, is expanded and / or damaged.
    According to an exemplary embodiment, the method further comprises sealing the front end of the guide channel, between the insulated internal pipeline and an inlet of the guide channel. Preferably the seal is provided with an inlet of the front end by means of a seal adapted to make an air cushion such that the seal can be made with little friction.
    According to an exemplary embodiment, an inlet of the guide channel comprises a transparent part, which part is adapted to allow an operator to see the insulated internal pipeline before it is displaced in the end casing. In this way, an operator can watch the process and take appropriate action if the insulated internal pipeline does not enter the jacket conduit as required.
    In an exemplary embodiment, providing a first end with an insulated internal pipeline comprises sealing the first end, for example by applying a clamp to the first end and applying an adhesive strip around the first end. The person skilled in the art realizes that other sealing means can be used.
    In an exemplary embodiment, the method further comprises, after attaching the end casing line into the guide channel, and before inserting into the end casing line an end insulated internal pipeline: providing a cable at the rear end of the guide channel; which cable has a first end and a second end; which cable is longer than the length of the guide channel, moving the first end of the cable through the interior of the inserted end casing from the rear end to the front end. Preferably, inserting into the end casing of an end insulated internal pipeline then comprises: connecting a first end of an end insulated internal pipeline to the first end of the cable, at the front end; and moving the first end from the front end to the rear end, by pulling the pressurized interior of the end casing, by pulling the second end of the cable from the rear end. Preferably, connecting the first end of an end insulated internal pipeline to the cable further comprises sealing the first end.
    In an exemplary embodiment, the first end of a cable is connected to an internal connector that is configured to be displaced through the interior of the end external casing; and moving the first end of the cable through the inserted end of the conduit conduit includes suctioning the internal connector from the rear end to the front end through the interior of the inserted end of the conduit conduit.
    In an exemplary embodiment, insertion into the end casing of an end insulated internal pipeline comprises: attaching a first end of an end insulated internal pipeline to a clamp configured to be displaced by the end casing; and moving the clip from the front end to the rear end, through the pressurized interior of the end casing. Preferably a cable is used to pull the clamp from the front end to the rear end.
    In an exemplary embodiment, inserting an end casing conduit into the guide channel comprises: providing a cable at the rear end of the guide channel; which cable has a first end and a second end; which cable is longer than the length of the guide channel; moving the first end of the cable through the guide channel from the rear end to the front end; connecting a first end of an end casing to the first end of the cable; moving the first end from the front end to the rear end, through the guide channel, by pulling the second end of the cable from the rear end. Such an embodiment works well for long guide channels. In a preferred embodiment, the first end of the cable is connected to a sheath connector; and moving the first end of the cable includes sucking the sheath connector from the rear end to the front end; and connecting a first end of an end casing line to the first end of the cable comprises connecting the casing connector to the first end of the cable.
    In an exemplary embodiment, inserting an end casing line comprises unwinding the end casing line from a winding roll, and cutting the end casing line.
    In an exemplary embodiment, the method furthermore comprises, during displacement of the first end of the end insulated internal pipeline to the rear end of the guide channel: the unwinding of an internal pipeline; bending at least one layer of insulating material around the internal pipe during the unwinding of the internal pipe.
    In an exemplary embodiment, the method further comprises, while moving the first end of the end insulated internal pipeline to the rear end of the guide channel, measuring a value representative of a force required to move the first end of the insulated internal pipeline to the rear end of the guide channel; and controlling the applied overpressure as a function of the measured value. In this way the radial compression of the insulating material of the insulated internal pipeline can be controlled.
    In an exemplary embodiment, the method further comprises during displacement of the first end of the end insulated internal pipeline to the rear end of the guide channel, measuring a value representative of a force required for displacing the first end inner pipeline insulated from the end to the rear end of the guide channel; and outputting a warning signal and / or interrupting movement when the measured value is higher than a predetermined value. Such a warning signal can be an indication that a seal is no longer functioning properly, and an operator can then address this problem. The control of the previous embodiment may also be included in this embodiment.
    In an exemplary embodiment of the system, the guide channel is a pipe-shaped channel, and the pressure generating means is connected to exert overpressure in the guide channel, both outside the end casing line and inside the end casing line.
    In an exemplary embodiment, the system further comprises a sealing member adapted to create a seal between the insulated internal pipeline and an inlet of the guide channel, while moving the first end of the end insulated internal pipeline from the front end to the rear. end of the guide channel. The sealing member may comprise means for creating a sealing air cushion around the insulated internal pipeline such that the sealing is performed with little friction.
    In an exemplary embodiment, the system further comprises a winch with cable with a first end and a second end; wherein the cable is longer than the length of the guide channel; wherein the second end is connected to the winch; a cable displacement member for moving the first end of the cable through the interior of an inserted end casing from the rear end to the front end; and a winch driving motor to pull the second end of the cable to move the first end of the cable from the front end to the rear end, to turn the end insulated internal pipeline into the end casing. to pull.
    In an exemplary embodiment, the system further comprises an internal connector adapted to be connected to the first end of the cable and configured to be displaced through the interior of the end external jacket conduit; wherein the cable displacement member comprises a suction member adapted to suck the inner connector from the rear end to the front end through the interior of the inserted end of the casing.
    In an exemplary embodiment, the system further comprises a clamp adapted to clamp the first end of the insulated internal pipeline and which is configured to be moved through the interior of the end external casing from the front end to the rear end.
    In an exemplary embodiment, the system further comprises a control device adapted to control the pressure generating means such that the overpressure is exerted during displacement of the insulated internal pipeline and such that the overpressure is released to secure the end insulated internal pipeline in the end casing to to form a pre-insulated pipe.
    In an exemplary embodiment, the system further comprises that the pressure generating means is adapted to inject a gas at least into an interior of the end casing line when it is introduced into the guide channel.
    In an exemplary embodiment, the guide channel has a length that is greater than 50 m, preferably greater than 70 m.
    In an exemplary embodiment, the system furthermore comprises a number of reels adapted to store a winding of a casing line; a winding of internal pipe; and a winding of shaped pre-insulated conduit.
    In an exemplary embodiment, the system further comprises a measuring module adapted to measure a value representative of a force required for moving the first end of the insulated internal pipeline to the rear end of the guide channel; and a controller adapted to control the pressure generating device in function of the measured values.
    In an exemplary embodiment, the system further comprises a measuring module adapted to measure a value representative of a force required for moving the first end of the insulated internal pipeline to the rear end of the guide channel; and a controller adapted to give a warning signal and / or to interrupt the displacement member when the measured value is higher than a predetermined value. The controller can moreover be adapted to control the pressure generating device as a function of the measured value, as in the previous embodiment.
    Brief description of the figures
    The accompanying drawings are used to illustrate non-limiting exemplary embodiments of devices according to the present invention that are currently preferred. The above-described and other advantages of the features and objects of the invention will become more apparent and the invention will be better understood with reference to the following detailed description when read together with the accompanying drawings, in which:
    Figures 1A-1I schematically illustrate an exemplary embodiment of a method for manufacturing a pre-insulated pipe;
    Figure 2 schematically illustrates an exemplary embodiment of a method for preparing an insulated internal pipeline;
    Figures 3A, 3B and 3C illustrate a schematic perspective view, an axial section and a detailed view of a first exemplary embodiment of a pre-insulated pipe; and Figures 4A and 4B illustrate a schematic perspective view and an axial section of a second exemplary embodiment of a pre-insulated pipe.
    Description of embodiments
    Figures 1A-1I schematically illustrate an exemplary embodiment of a method for manufacturing a pre-insulated pipe. Figures 1A and 1B illustrate how an end casing line 10 is inserted into a tubular guide channel 110. The guide channel 110 has a front end 111 and a rear end 112. The length of the guide channel 110 is preferably greater than 50 m, more preferably preferably greater than 70 m, and for example between 70 and 110 m. After insertion of the end casing line 10 into guide channel 110, the casing line is fixed in place using a plurality of fixing modules 120, see also Figure 1H. Figures 1C-1I illustrate the steps of installing a pull cable 130 in jacket conduit 10 (Figures 1C, 1D and 1E); applying a clamp 138 to a first end 21 of an end insulated internal pipeline 20 (Figure 1E); connecting terminal 138 with traction cable 130, and inserting, at the front end 111 of guide channel 110, into the end casing 10, of the first end 21 of the insulated internal pipeline 20 (Figure 1G); exerting an overpressure at least in an interior of the inserted end of casing conduit 10 (figures 1G and 1H); and moving the first end 21 from the front end 111 to the rear end 112 of guide channel 110 (Figure 11). In a final, non-illustrated step, the excess pressure is released to attach the end insulated internal pipeline 20 to the end casing 10 to form a pre-insulated conduit.
    Figures 1A and 1B illustrate how an end casing line 10 is inserted into a guide channel 110. In Figure 1A, a cable 130 is provided at the rear end 112 of guide channel 110. Cable 130 has a first end 131 and a second end connected to a winch 140. Cable 130 is longer than the length of guide channel 110. The first end 131 of cable 130 is connected to a sheath connector 135. The first end 131 of cable 130 is moved through guide channel 110 from the rear end 112 to the front end 111 by sucking casing connector 135 from the rear end 112 to the front end 111 using a suction pump 150 connected to the front end 111 to create an underpressure in guide channel 110 between the front end 111 and casing connector 135. During suction, the front end 111 is closed with a door 115. The casing connector 135 is designed for the creating a barrier in guide channel 100 such that it can be sucked in. Then, as illustrated in Figure 1B, a first end 11 of an end casing line 10 is connected to casing connector 135. To this end, casing connector 135 can be provided with a front portion 135a that fits into the first end 11 of the casing line 10. Front portion 135a can be provided of a bore 133 for a pin 136 for securing the first end 11 of the casing conduit 10 to the casing connector 135. The pin 136 extends through the wall of the first end 11 of casing conduit 10, and through the bore 133. Next, the first end 11 moved from the front end 111 to the rear end 112, through guide channel 110, by pulling on the second end of cable 130 using winch 140. The insertion of the end casing line 10 may include unwinding the end of casing line 10 of a winding roll (not shown). Figure 1C illustrates the situation where the end casing line 10 is in place in guide channel 110. Once the end casing line 10 has been unwound, a further step may be to cut off the end casing line 10. The mounting modules 120 can now be operated to clamp the end of the casing line 10 at the height of several positions in the guide channel, for example every 5 meters. In an exemplary embodiment, the mounting module may comprise a clamping piece that can be lowered into guide channel 110 to clamp the jacket conduit 10, see also Figure 1H.
    Next, as illustrated in Figure 1C, sheath connector 135 can be disconnected, and the first end 131 of cable 130 connected to an inner connector 137 configured to be displaced by the inner end of the outer sheath conduit 10. The first end 131 of cable 130 is displaced through the interior of the inserted end sheath line 10 from rear end 112 to front end 111 by sucking inner connector 137 from the rear end 112 to the front end 111 through the interior of the inserted end jacket line 10 using a suction pump 150 connected by a suction guide 151 to the front end of jacket line 10, see figure 1D. As explained below, a door 117 may be provided to seal the rear end 112 of the guide channel 110. Door 117 can remain open during the suction of internal connector 137 to prevent a negative pressure in the jacket conduit 10 on the rear-end side 12. Alternatively, a ventilation device may be provided in door 117 which can be sealed when the door 117 is to seal the rear end 112, see below. When an operator hears that the internal connector 137 is arriving at the front end 111 of guide channel 110, he can disconnect suction guide 151 connecting pump 150 to the front end of casing line 10. In this way, cable end 131 becomes available at the front end 111, while cable 130 extends through jacket conduit 10, see Figure 1E. Now, internal connector 137 can be disconnected and transported, for example by means of a transport system 200, back to the rear end 112 such that it is available at the rear end 112 for the next pre-insulated pipe to be manufactured.
    Then, a first end 21 of an end insulated internal pipeline 20 is inserted into the end casing 10 as follows, see Figures 1F-1H. The end insulated internal pipeline 20 comprises an end internal pipeline 25 surrounded by at least one layer of insulating material 26. The first end 21 of the end insulated internal pipeline 20 is connected to a clamp 138. The person skilled in the art realizes that this step can be carried out in advance that is, before displacing internal connector 137 from the rear end 112 to the front end 111 and even before arranging casing conduit 10 in guide channel 110. Clamp 138 is designed to securely engage around the at least one layer of insulating material 26 The clamp 138 may comprise two shells 138a, 138b which engage around the insulating material 26 and engage around the first end 21 and / or the first end 21 radially compressing, see Figure 1F. The attachment can be improved by radially drilling a bore 23 in the first end 21, through internal pipe 25, and inserting a pin 139 in the bore 23. If the insulated internal pipe 20 comprises two internal pipes, see for example the embodiment of Figure 4A, the bore 23 can extend through the two internal lines 25. This pin 139 is received in openings in the inner surface of the clamping shells 138a, 138b. In this way it is possible to prevent the first end 21 from coming loose when it is pulled through the end of the casing line 10. Additionally, the inner surfaces of the clamping shells 138a, 138b can be provided with claws which engage in the insulating layer 26 at the first end 21 of the end. internal pipeline 20. After applying the clamps 138, the seal can be further improved by applying an adhesive strip 134 around the clamp 138 and the internal pipeline 20 (the adhesive strip 134 is visible in Figure 1G). Then, the clamp 138 connected to the end internal pipeline 20 is connected to cable end 131 and inserted into end casing 10, at the front end 111.
    An inlet piece 170 with a transparent wall portion 171 is provided at the front end 111 as an extension of guide channel 110, see Figure 1G. This transparent wall part 171 is adapted to allow an operator to see the insulated internal pipeline 20 before it is displaced in the end casing 10. At the front end 111, a seal 180 is provided between the insulated internal pipeline 20 and an inlet of the inlet piece 170. At the rear end 112, a bell-shaped door 117 is closed to seal the rear end 112 of guide channel 110, a small opening 117a being provided in the bell-shaped door to allow the cable 130 to pass through the door. The shape of door 117 is adapted to the shape of the clamp 138 such that the clamp 138 can be received in the door 117 when it reaches the rear end 112. Door 117 is not shown in figures 1A and 1B, but a person skilled in the art realizes that door 117 may also be present in those steps. Now, an internal overpressure B is applied in guide channel 110, using a compressor 160 such that overpressure B is present around the insulated internal pipeline 20 in casing line 10 and around the end of casing line 10, see Figs. 1H and 11. Next, the first end 21 is pulled from the front end 111 to the rear end 112, by pulling the pressurized portion of the end casing line 10 to the second end of the cable 130 using winch 140. The overpressure P is such that the at least one layer 26 of insulation material is compressed radially, thereby preventing the insulation material from being damaged during the pull-through process. Preferably, the end insulated internal pipeline 20 is displaced in the end casing line 10 using a predetermined speed and / or using a predetermined force. The overpressure P is preferably higher than 30 mbar, more preferably higher than 400 mbar, and most preferably higher than 450 mbar. The overpressure P can be adjusted as a function of the properties of the insulated internal pipeline 20. The overpressure P is preferably selected between 300 mbar and 1000 mbar.
    The seal 180 at the inlet can be provided by means of a seal adapted to make an air cushion around the moving end insulated internal pipeline 20, such that the seal can be made with little friction. In this way, the seal 180 can be prevented from wearing off while the end insulated internal pipeline 20 is being pulled in. This seal 180 can be adjusted as a function of the diameter of the insulated internal pipeline 20.
    To determine if seal 180 is operating in a normal sealing mode, the tensile force required to pull cable 130 through the jacket conduit can be measured, for example, using a force sensing member 210, e.g. integrated into a motor of winding roller 140. This tensile force will be relatively low when the seal through seal 180 is protruding, since in that case the excess pressure will sufficiently compress the insulating material, resulting in relatively little friction between casing 10 and the assembly of the clamp 118 and the insulated internal pipeline pulled through the jacket line 10. When the seal deteriorates due to seal 118, the required tensile force will increase. This increase in the tensile force can be used to generate a warning indication that the seal 180 must be examined, for example by means of a controller 220. The tensile force measured by the force measurement module 210 can also be used to compress the insulation material of the insulated internal pipeline 20. to control the compressor 160. The compressor 160 can be controlled by a controller 220 to increase the pressure P when the measured pressure force is too high, see also Figure 11. In normal operation, the tensile force can be, for example, between 300 kg and 1000 kg.
    When the pull through process is complete, the terminal 138 can be disconnected from cable 130 and from insulated internal pipeline 20. Terminal 138 can be transported back to the front end 111 using conveyor system 200. The pre-insulated pipe formed can be removed from guide channel 110, and optionally the pre-insulated pipe can be wound.
    For the manufacture of the insulated internal pipeline 20, an additional packaging station can be provided for arranging the at least one layer of insulating material 26 around an internal pipeline 25. Such a station may be provided in front of the inlet of inlet piece 170 shown in Figure 11. A process for applying the at least one layer of insulating material 26 around an internal conduit 25 is illustrated in Figure 2. The process comprises unwinding an internal conduit 25 from a winding roll 190; and at least one layer of insulating material 26, crimping around internal conduit 25 during unwinding of the internal conduit 25, by moving the internal conduit 25 and the at least one layer of insulating material 26 "through a funnel-shaped device 180. The insulating layer material 26 "can be unwound from a roll. In order to ensure a good connection between the edges 26a, 26b of the at least one layer of insulating material 26 ", an adhesive strip 27 can be arranged on the interface between the two edges 26a, 26b. The adhesive strip 27 can also be applied from a roll. These operations (unwinding, advancing the insulating layer material 26 ", advancing the adhesive strip 27) can be performed at the same speed as the speed at which the insulated internal pipeline 20 is pulled into the end casing 10.
    Figures 3A, 3B and 3C illustrate a first embodiment of a pre-insulated pipe obtained in accordance with a method according to the invention. The pre-insulated conduit comprises a casing conduit 10 and an insulated internal pipeline 20. Casing conduit 10 has a smooth inner surface 16 and a ribbed outer surface 15. Casing conduit 10 may be a double-walled conduit formed as an assembly of a ribbed outer wall and a flat inner wall such that cable conduit 10 has hollow ribs 17. Figure 3C shows a detail of the longitudinal section of Figure 3B. Here it can be seen that, due to the fact that the insulating material 26 is compressed, the casing can have curved sections 18 at the height of the hollow ribs 17. Insulated internal pipeline 20 comprises an end internal pipe 25 surrounded by at least one layer of insulating material 26, wherein the insulating material 26 is compressed radially elastically. The compression may be such that if the casing 10 were cut open, the insulating material 26 would expand radially, for example over a distance greater than 0.05 mm, or greater than 0.5 mm, or greater than 1 mm, or greater then 2 mm.
    The internal conduit 25 can be made of rigid plastic material such as a PE material, for example PE-Xa (i.e. polyethylene with cross-linked adjacent chains made by the peroxide or Engel process). An oxygen diffusion barrier may be contained in the internal conduit 25. The casing conduit 10 may be a double-walled conduit, for example made of a PE material. The at least one layer of insulating material 26 can be made of a PE foam, preferably a microcellular cross-linked PE foam.
    In the exemplary embodiments of Figures 3A-3C, insulation material 26 is provided between the casing pipe 10 and the inner pipe 25. The person skilled in the art recognizes that this insulation material can be provided as a number of layers of insulation material surrounding the inner pipe, as indicated in broken lines in Figure 3A and Figure 3B.
    The pre-insulated pipe of Fig. 3A and Fig. 3B can have one or more of the following features: the casing pipe 10 has an outer diameter between 50 and 250 mm; the inner pipe 25 has an outer diameter between 20 and 125 mm; the internal conduit 25 has a wall thickness between 1 and 10 mm; the at least one layer of insulating material 26 has a thickness between 10 and 70 mm; the insulation material 26 has a lambda value of less than 0.050 W / mK; the jacket pipe 10, the internal pipe 25 and the at least one insulating layer 26 have a length of more than 50 m.
    EXAMPLE
    An example of the pre-insulated conduit of Fig. 3A and Fig. 3B is intended as a conduit for transporting fluids, in particular hot fluids, and has the following characteristics: - Internal conduit 25 made of PE-Xa in accordance with EN ISO 15875 with an oxygen barrier in accordance with DIN 4726; - Insulation material 26 made from thermal, elastic, CFC-free foam made from cross-linked PE-X with a closed microcellular structure; - Pipe conduit 10 in the form of a ribbed outer housing in HDPE, manufactured in accordance with a closed chamber principle to provide high quality protection of the pre-insulated pipe.
    Examples of dimensions and properties are: 1. The casing pipe 10 has an outside diameter of 75 mm; the internal conduit 25 has an outer diameter of 25 mm; the internal conduit 25 has a wall thickness of 2.3 mm; the bending radius of the pre-insulated pipe is between 0.15 and 0.25 m; the weight of the pre-insulated pipe is between 0.6 and 0.8 kg / m; the average heat output at a water temperature of 80 ° C and a temperature difference of 20 ° C is between 25 and 35 kW. 2. The pipe conduit 10 has an outside diameter of 160 mm; the internal conduit 25 has an outer diameter of 40 mm; the internal conduit 25 has a wall thickness of 3.7 mm; the bending radius of the pre-insulated pipe is between 0.30 m and 0.35 m; the weight of the pre-insulated pipe is between 2.20 and 2.40 kg / m; the average heat output at a water temperature of 80 ° C and a temperature difference of 20 ° C is between 80 and 100 kW. 3. The casing pipe 10 has an outer diameter of 200 mm; the internal conduit 25 has an outside diameter of 125 mm; the internal pipe 25 has a wall thickness of 11.4 m; the bending radius of the insulated pipe is between 1.2 m and 1.6 m; the weight of the pre-insulated pipe is between 2.20 and 2.40 kg / m; the average heat output at a water temperature of 80 ° C and a temperature difference of 20 ° C is between 800 and 1000 kW.
    Figures 4A and 4B illustrate a second embodiment of a pre-insulated pipe obtained in accordance with a method according to the invention. The pre-insulated conduit comprises a casing conduit 10 and an insulated internal pipeline 20. Casing conduit 10 has a smooth inner surface 16 and a ribbed outer surface 15. Casing conduit 10 may be a double-walled conduit formed as an assembly of a ribbed outer wall and a flat inner wall such that cable conduit gives 10 hollow ribs. Insulated internal pipeline 20 comprises two internal pipes 25a, 25b surrounded by at least one layer of insulating material 26, the insulating material 26 being compressed radially elastically. The two internal pipes 25a, 25b are contained in a core 27, also called a dog bone, and the at least one layer of insulating material 26 surrounds core 27. The person skilled in the art realizes that more than two internal pipes can be provided in the dog bone.
    In the exemplary embodiments of Figs. 4A and 4B, insulating material 26 is provided between casing 10 and dog bone 27. The person skilled in the art recognizes that this insulating material 26 may be provided as a plurality of layers of insulating material surrounding the internal conduit, as indicated in broken lines in Fig. 4A. and figure 4B.
    The pre-insulated pipe of Figure 4A and Figure 4B can have one or more of the following features: the casing pipe 10 has an outer diameter between 100 and 250 mm; the internal pipes 25a, 25b have an outside diameter between 20 and 100 mm; the internal pipes 25a, 25b have a wall thickness between 1 and 10 mm; the at least one layer of insulating material 26 has a thickness between 10 and 70 mm; the insulation material has a lambda value lower than 0.050 W / mK; the jacket pipe 10, the internal pipe 25 and the at least one insulating layer 26 have a length of more than 50 m.
    EXAMPLE
    An example of the pre-insulated conduit of Fig. 4A and Fig. 4B is intended as a conduit for transporting fluids, in particular hot fluids, and has the following features: - Internal conduits 25a, 25b made of PE-Xa in accordance with EN ISO 15875 with an oxygen barrier in accordance with DIN 4726; - Dog bone 27 made from a CFC-free closed cell, cross-linked polyethylene foam; - Insulation material 26 made from thermal, elastic CFC-free foam made from cross-linked PE-X with a closed microcellular structure; - Cable conduit 10 in the form of a ribbed outer housing in HDPE, manufactured in accordance with a closed chamber principle to provide high quality protection with the pre-insulated.
    Examples of dimensions and properties are: 1. The pipe conduit 10 has an outside diameter of 160 mm; the internal pipes 25a, 25b have an outer diameter of 25 mm; the internal pipes 25a, 25b have a wall thickness of 2.3 mm; the bending radius of the pre-insulated pipe is between 04, m and 0.6 m; the weight of the pre-insulated pipe is between 2.1 and 2.3 kg / m; the average heat output at a water temperature of 80 ° C and a temperature difference of 20 ° C is between 25 and 35 kW. The pressure P exerted in the step of Figure 1G described above to make a pre-insulated conduit with the properties of Example 2 can be, for example, between 450 and 550 mbar, preferably between 475 and 525 mbar. The tensile force in the step of Figure 1G described above, in normal operation, may be, for example, between 450 and 550 kg. 2. The pipe conduit 10 has an outside diameter of 160 mm; the internal pipes 25a, 25b have an outer diameter of 40 mm; the internal pipes 25a, 25b have a wall thickness of 3.7 mm; the bending radius of the pre-insulated pipe is between 0.5 m and 0.7 m; the weight of the pre-insulated pipe is between 2.5 and 2.7 kg / m; the average heat output at a water temperature of 80 ° C and a temperature difference of 20 ° C is between 80 and 100 kW. The pressure P exerted in the step of Figure 1G described above to make a pre-insulated conduit with the properties of Example 2 may be, for example, between 500 and 600 mbar, preferably between 525 and 575 mbar. The tensile force in the step of Figure 1G described above, in normal operation, may be, for example, between 550 and 650 kg. 3. The casing pipe 10 has an outer diameter of 200 mm; the internal conduits 25a, 25b have an outside diameter of 63 mm; the internal pipes 25a, 25b have a wall thickness of 5.8 mm; the bending radius of the pre-insulated pipe is between 1.1 m and 1.3 m; the weight of the pre-insulated pipe is between 4.5 and 4.8 kg / m; the average heat output at a water temperature of 80 ° C and a temperature difference of 20 ° C is between 200 and 240 kW.
    It is to be understood by those skilled in the art that each block diagram herein represents conceptual insights of illustrative components embodying the principles of the invention.
    Although the principles of the invention have been set forth above in connection with specific embodiments, it is to be understood that this description is prepared as an example only, and not as a limitation on the scope of protection defined by the appended claims.
    权利要求:
    Claims (38)
    [1]
    Conclusions
    Method for manufacturing a pre-insulated pipe, comprising: - inserting an end casing pipe into a guide channel with a front end and a rear end; - fixing the end of the casing pipe in the guide channel; - providing a first end with an end-insulated internal pipeline, which end-insulated internal pipeline comprises an end-internal pipe surrounded by at least one layer of compressible insulating material; - inserting, at the front end of the guide channel, into the end casing, insulated internal pipeline from the first end of the end; - exerting an overpressure at least in an interior of the pipe end, around the inserted first end of the end insulated internal pipeline; and - moving the first end of the insulated internal pipeline to the rear end of the guide channel; wherein the overpressure is such that at least one layer of insulating material is compressed radially; - releasing the excess pressure to secure the end insulated internal pipeline in the end casing to form a pre-insulated conduit.
    [2]
    Method according to claim 1, wherein the guide channel is a pipe-shaped channel, and the overpressure is also exerted in the guide channel, outside the end casing line.
    [3]
    3. Method as claimed in claim 1 or 2, further comprising, during displacement of the first end of the end insulated internal pipeline to the rear end of the guide channel: - sealing the front end of the guide channel, between the insulated interior pipeline and an inlet of the guide channel.
    [4]
    The method of claim 3, wherein sealing the front end uses a seal adapted to make an air cushion around the end insulated internal pipeline.
    [5]
    Method according to claim 3 or 4, wherein the inlet comprises a transparent part, which part is adapted to allow an operator to see the insulated internal pipeline before it is displaced in the end casing.
    [6]
    Method as claimed in any of the foregoing claims, further comprising, after attaching the end casing line in the guide channel, and before inserting into the end casing line an end insulated internal pipeline: - providing a cable at the rear end of the guide channel; which cable has a first end and a second end; which cable is longer than the length of the guide channel; - moving the first end of the cable through the interior of the inserted end of the cable conduit from the rear end to the front end; wherein inserting into the end casing of an end insulated internal pipeline comprises: - connecting a first end of an end insulated internal pipeline to the first end of the cable, at the front end; - moving the first end from the front end to the rear end, by pulling the pressurized interior of the end casing, by pulling the second end of the cable from the rear end.
    [7]
    A method according to any one of the preceding claims, wherein the insertion into the end casing of an end insulated internal pipeline comprises: - attaching a first end of an end insulated internal pipeline to a clamp designed to be moved through the end jacket pipe; - moving the clamp from the front end to the rear end, through the pressurized interior of the end casing.
    [8]
    A method according to any one of the preceding claims, wherein the insertion of an end casing line into the guide channel comprises: - providing a cable at the rear end of the guide channel; which cable has a first end and a second end; which cable is longer than the length of the guide channel; - moving the first end of the cable through the guide channel from the rear end to the front end; - connecting a first end of an end casing to the first end of the cable; - moving the first end from the front end to the rear end, through the guide channel, by pulling the second end of the cable from the rear end.
    [9]
    The method of claim 8, wherein the first end of the cable is connected to a sheath connector; wherein moving the first end of the cable comprises suctioning the sheath connector from the rear end to the front end; and wherein connecting a first end of an end casing to the first end of the cable comprises connecting the casing connector to the first end of the cable.
    [10]
    A method according to any one of the preceding claims, wherein introducing an end casing line comprises unwinding the end casing line from a winding roll, and cutting the end casing line.
    [11]
    11. Method as claimed in any of the foregoing claims, further comprising, during moving from the first end of the end insulated internal pipeline to the rear end of the guide channel: - unwinding of an internal pipeline; - bending at least one layer of insulating material around the internal pipe during the unwinding of the internal pipe.
    [12]
    A method according to any one of the preceding claims, wherein applying an overpressure is performed by injecting a gas under pressure into at least the interior of the end casing.
    [13]
    A method according to any one of the preceding claims, wherein the end insulated internal pipeline is displaced in the end casing using a predetermined speed and / or a predetermined force.
    [14]
    A method according to any one of the preceding claims, wherein the end casing line has a smooth inner surface and a ribbed outer surface.
    [15]
    A method according to any one of the preceding claims, wherein the end casing line is a double-walled line.
    [16]
    A method according to any one of the preceding claims, wherein the end insulated internal pipeline comprises at least two layers of insulating material.
    [17]
    A method according to any one of the preceding claims, wherein the end casing and / or the insulated internal pipeline are / are larger than 50 m, preferably larger than 70 m.
    [18]
    A method according to any one of the preceding claims, comprising: - removing the formed pre-insulated line from the guide channel; and - winding the pre-insulated pipe.
    [19]
    A system for manufacturing a pre-insulated line, comprising: - a guide channel adapted to receive an end casing line, which guide channel has a front end and a rear end; - a fixing member adapted for fixing the end of the casing line in the guide channel; a pressure generating device adapted to exert an overpressure at least in an interior of the end casing line when, at the front end of the guide channel, a first end of an end insulated internal pipeline is introduced into the end casing line, which end insulated internal pipeline comprises an end internal conduit surrounded by at least one layer of compressible insulating material; - a displacement member adapted for displacing the first end to the rear end of the guide channel.
    [20]
    The system of claim 19, wherein the guide channel is a pipe-shaped channel, and the pressure generating member is connected for applying the overpressure in the guide channel, both outside the end casing line and inside the end casing line.
    [21]
    A system according to claim 19 or 20, further comprising a sealing device adapted to create a seal between the insulated internal pipeline and an inlet of the guide channel, while moving the first end of the end insulated internal pipeline from the front end to the rear end of the guide channel.
    [22]
    The system of claim 21, wherein the sealing device comprises means for creating a sealing air cushion around the insulated internal pipeline such that the sealing is performed with little friction.
    [23]
    The system of claim 21 or 22, wherein the inlet comprises a transparent member, which member is adapted to allow an operator to see the insulated internal pipeline before it is displaced in the end casing.
    [24]
    A system according to any one of claims 19-23, further comprising: - a winch with cable with a first end and a second end; which cable is longer than the length of the guide channel; which second end is connected to the winch; - a cable displacement member for moving the first end of the cable through the interior of an inserted end casing from the rear end to the front end; - a winch driving motor to pull at the second end of the cable to move the first end of the cable from the front end to the rear end, to turn the end insulated internal pipeline into the end casing. to pull.
    [25]
    The system of claim 24, further comprising an internal connector adapted to be connected to the first end of the cable and configured to be displaced through the interior outer end of the cable conduit; wherein the cable displacement member comprises a suction member adapted to suck the inner connecting piece from the rear end to the front end through the interior of the inserted end of the casing.
    [26]
    26. System as claimed in any of the claims 19-25, further comprising a clamp adapted to clamp the first end of the insulated internal pipeline and designed to be moved through the interior of the end external casing from the front end to the rear end.
    [27]
    27. System as claimed in any of the claims 19-26, furthermore comprising a control device adapted to control the pressure generation device such that the excess pressure is exerted during the displacement of the insulated internal pipeline and such that the excess pressure is removed to release the insulated internal pipeline. attach in the end casing to form a pre-insulated pipe.
    [28]
    A system according to any one of claims 19-27, wherein the pressure generating means is adapted to inject a gas at least into an interior of the end casing line when it is introduced into the guide channel.
    [29]
    29. A system according to any one of claims 19-28, wherein the guide channel has a length that is greater than 50 m.
    [30]
    30. System as claimed in any of the claims 19-29, comprising a number of reels adapted for storing a winding of a casing line; a winding of internal pipe; and a winding of shaped pre-insulated conduit.
    [31]
    31. Pre-insulated pipe, in particular a pre-insulated pipe manufactured according to the method according to any one of claims 1-18, comprising an insulated internal pipeline surrounded by a jacket pipe; said insulated internal pipeline comprising an internal pipeline surrounded by at least one layer of insulating material; wherein the insulating material is compressed radially elastically and wherein the at least one layer of insulating material is in direct contact with the jacket conduit.
    [32]
    The pre-insulated pipe of claim 31, wherein the casing pipe has a smooth inner surface and a ribbed outer surface.
    [33]
    A pre-insulated pipe according to claim 31 or 32, wherein the casing pipe is a double-walled pipe.
    [34]
    Pre-insulated pipe according to any of claims 31-33, wherein the insulated internal pipeline comprises at least two internal pipes which are contained in a core, the at least one layer of insulating material surrounding the core.
    [35]
    The method of any one of claims 1-18, wherein during displacement of the first end of the end insulated internal pipeline to the rear end of the guide channel, a value representative of a force required to move the first end of the insulated internal pipeline to the rear end of the guide channel is measured; and wherein the applied overpressure is regulated as a function of the measured value.
    [36]
    A method according to any of claims 1-18, wherein during displacement of the first end of the end insulated internal pipeline to the rear end of the guide channel, a value representative of a force required for moving the first end of the insulated internal pipeline to the rear end of the guide channel is measured; and wherein a warning signal is issued and / or the movement is interrupted when the measured value is higher than a predetermined value.
    [37]
    A system according to any one of claims 19-30, further comprising a measurement module adapted to measure a value representative of a force required for moving the first end of the insulated internal pipeline to the rear end of the guide channel ; and a control device adapted to control the pressure generating device in function of the measured value.
    [38]
    A system according to any one of claims 19-30, further comprising a measurement module adapted to measure a value representative of a force required for moving a first end of the insulated internal pipeline to the rear end of the guide channel ; and a control device adapted for issuing a warning signal and / or for interrupting the displacement member when the measured value is higher than a predetermined value.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2262248A1|1974-02-25|1975-09-19|Graenges Essem Ab|
    EP1036643A1|1999-03-16|2000-09-20|Ludwig Seebauer|Method for producing heat insulated pipes|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    BE2015/5570|2015-09-11|
    BE201505570|2015-09-11|EP16787550.9A| EP3347642B1|2015-09-11|2016-09-09|Method and system for producing a pre-insulated pipe, and pre-insulated pipe|
    CN201680052221.0A| CN108139016B|2015-09-11|2016-09-09|Method and system for manufacturing pre-insulated piping and pre-insulated piping|
    EA201890706A| EA035286B1|2015-09-11|2016-09-09|Method and system for producing a pre-insulated pipe, and pre-insulated pipe|
    US15/758,238| US10730229B2|2015-09-11|2016-09-09|Method and system for producing a pre-insulated pipe, and pre-insulated pipe|
    PCT/IB2016/001270| WO2017042621A1|2015-09-11|2016-09-09|Method and system for producing a pre-insulated pipe, and pre-insulated pipe|
    US16/909,061| US10926453B2|2015-09-11|2020-06-23|Method and system for producing a pre-insulated pipe, and pre-insulated pipe|
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