巴西专利BR112016022229B1 INTERNAL HEAT EXCHANGER (IHEX) FOR INTERNAL COOLING OF TWO WELDED TUBES

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专利摘要:
internal pipe cooler. an internal heat exchanger (ihex) for pipe welding includes a drive system configured to move the ihex into a position within at least one pipe section near a weld joint location with another pipe section. the ihex additionally includes a cooling section including the cooling frame configured to selectively cool one or more interior surface portions of the at least one pipe section and a controller in communication with the cooling frame and configured to activate the pipe section. cooling when the ihex is in position inside the at least one pipe section.
公开号:BR112016022229B1
申请号:R112016022229-6
申请日:2015-03-26
公开日:2021-06-01
发明作者:Shankar Rajagopalan；Jose C. Bouche；Jason W. Curbo；Jonathon B. Kettlekamp；Brian L. Kirk；Siddharth Mallick
申请人:Crc-Evans Pipeline International, Inc.；
IPC主号:

专利说明:

FIELD
[0001] The present invention is directed to pipe welding systems, in which welding joints are formed at the ends of two pipes being connected. FUNDAMENTALS
[0002] Piping systems, which may include long stretches of piping sections (eg, miles of piping) comprising iron (eg, steel, stainless steel) or other types of metal, are used to transport fluids such as water , oil and natural gas between two locations (eg from a source source that may be land-based or water-based to a suitable storage location). Construction of piping systems typically involves connecting piping sections of the proper diameter and lengthwise dimensions together by means of weld joints capable of providing a tight seal to the connected piping sections.
[0003] During the formation of a weld joint between two pipe sections (for example, two pipes with similar lengthwise and/or cross-sectional dimensions), one end of a pipe section is brought very close together. or in contact with one end of a second section of pipe. The tube sections are held in relation to each other and a weld joint is formed to connect the two ends of the tube sections using a suitable welding process. Tubes are normally preheated to a suitable temperature before brazing, and a significant amount of heat is also generated during the brazing process.
[0004] Some time after the weld is completed and cleaned, the weld can be inspected. It is desirable to inspect the weld at a temperature closer to the operating temperature than to the high weld temperature. Therefore, cooling after the welding process is desired prior to inspection. After inspection, it may be desirable to apply external protective coatings to the joint. To facilitate this coating, heat can be added to the tube in order to raise the tube temperature needed for the application of certain external coatings (eg polypropylene).
[0005] After such heating, the pipe connection must be allowed to cool to a suitable temperature before additional processing steps can take place (for example, before winding connected pipe sections or handling/putting pipe sections into water or any other suitable location on the ground).
[0006] During some pipe fabrication steps (eg after welding and before inspection), outer portions of the joined pipe are easily accessible, and cooling on the outer surface is an option and may even be preferred. However, during some portions of the process (for example, after certain materials have been externally applied to the outer surface of the tube) the outer surface is not available, on which a tube cooling process is conducted.
[0007] Internal cooling may be preferred during certain portions of the manufacturing process (ie, even when external cooling is available). Internal cooling inside the tubes can be challenging due to the size of the tubes and the difficulty of accessibility to the inner portion of the tube section that is located at or near the weld joint. Therefore, it would be especially desirable to provide internal cooling, so that during portions of the process where external surfaces of the tube are inaccessible, cooling can be implemented to more quickly condition the tube for future steps that require lower temperatures (eg winding ). SUMMARY
[0008] An internal heat exchanger (IHEX) for pipe welding comprises a drive system configured to move the IHEX into a position within at least one pipe section near a welding joint location with another pipe section . The IHEX further comprises a cooling section including the cooling structure configured to selectively cool one or more interior surface portions of the at least one pipe section and a controller in communication with the cooling structure and configured to activate the pipe section. cooling when the IHEX is in a joint position within the at least one pipe section. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Fig. 1 is a perspective view illustrating an exemplary embodiment of an internal heat exchanger for use in pipe welding according to the present invention.
[0010] Fig. 2 is a perspective view of the internal heat exchanger of Fig. 1 just prior to insertion into an end of a pipe section according to an exemplary embodiment of the present invention, wherein the section of tube is shown in circular section.
[0011] Fig. 3 is a perspective view of the internal heat exchanger of Fig. 1 located within a first section of tube which is secured by means of a joint welded to a second section of tube according to an exemplary embodiment of the present invention, wherein both tube sections are shown in circular section.
[0012] Fig. 4 is a closer view of Fig. 3, wherein the internal heat exchanger is located within the first and second pipe sections in a suitable location relative to the weld joint to facilitate internal cooling in the welding joint, in accordance with an exemplary embodiment of the present invention.
[0013] Fig. 5 is a perspective view of an exemplary embodiment of the internal heat exchanger of Fig. 1 connected with a connecting clamp in accordance with the present invention.
[0014] Fig. 6 is a perspective view of another exemplary embodiment of the internal heat exchanger of Fig. 1 connected with a connecting clamp in accordance with the present invention.
[0015] Fig. 7A is a perspective view illustrating another exemplary embodiment of an internal heat exchanger for use in pipe welding in accordance with the present invention.
[0016] Fig. 7B is an enlarged perspective view of a portion of the internal heat exchanger of Fig. 7A.
[0017] Fig. 8A is a partial perspective view of a further embodiment of a portion of an internal heat exchanger for use in pipe welding according to the present invention, wherein a water pump is provided at one end. of a portion of a pipe section, wherein the portion of the pipe section is illustrated in circular section.
[0018] Fig. 8B is a partial perspective view of a portion of the internal heat exchanger of Fig. 8A, wherein the portion of the internal heat exchanger is within two tube sections secured together by a weld joint, and tube sections are illustrated in circular section.
[0019] Fig. 9A is a partial perspective view of a still further embodiment of a portion of an internal heat exchanger for use in pipe welding according to the present invention, wherein a water pump is provided with a end of a portion of a pipe section, wherein the portion of the pipe section is illustrated in circular section.
[0020] Fig. 9B is a partial perspective view of a portion of the internal heat exchanger of Fig. 9A, wherein the portion of the internal heat exchanger is within two tube sections secured together by a weld joint, and tube sections are illustrated in circular section.
[0021] Like reference numbers have been used to identify like elements throughout this disclosure. DETAILED DESCRIPTION
[0022] An internal heat exchanger provides internal cooling within the tube sections after the tube sections have been secured together by means of a weld joint. The internal heat exchanger (also referred to in this document as "IHEX") includes a cooling section to provide direct cooling to inner surface portions of pipe sections, and a control section that controls cooling section components and, additionally, is configured to facilitate mobility of the IHEX within sections of pipe. In certain exemplary embodiments where the cooling section uses a coolant to provide internal cooling within sections of pipe, the IHEX may additionally include a supply of coolant to be supplied to the cooling section during operation of the IHEX .
[0023] During pipe forming operations (for example, for marine or land operations), one section of pipe is connected to another section of pipe in a butt weld (the location where the two sections of pipe are welded together) by lining up two opposite ends of the pipe sections and forming a weld joint. Such a joint connects the two sections of pipe at their opposite ends in such a way that the weld joint produces a tight seal and thus a continuous fluid passage between the two joined pipe sections. Each pipe section can be considerably long (eg hundreds or thousands of feet or even as long as a mile), which makes it difficult to provide internal cooling within the pipe sections at or near the connection weld location after the weld joint has been formed. In particular, the placement of a cooling structure, as well as the removal of such an internal structure inside the pipe sections for cooling in the weld joint, is a challenge. The IHEX modalities described in this document provide a useful mechanism to internally cool the pipe sections after they are welded together, as well as a simple mechanism for placing inside and retrieving from the pipe sections during the pipe forming process, the which results in a reduction in the time required to cool the pipe sections after heating and also an acceleration in progress through the stations needed for fabrication.
[0024] An exemplary embodiment of an IHEX for use in pipe welding operations is illustrated in Fig. 1. The IHEX 10 includes a suitably rigid frame housing components of the IHEX, wherein the frame comprises a plurality of extending rods longitudinally or lengthwise constructed of one or more suitable materials (eg a metal such as steel or other suitably rigid and durable materials) and has a suitable configuration to allow insertion of the frame into sections of pipe to facilitate internal cooling inside the pipe sections as described in this document. A first frame section 11 includes a coolant supply source 12 comprising one or more tanks (illustrated as a single tank in Fig. 1) secured within the first section. Coolant supply source tanks may include any suitable coolant including, without limitation, water, a cryogenic fluid such as liquid argon or liquid nitrogen, etc. The second cooling section 16 is secured at an intermediate frame location adjacent to the first section 11 and communicates with the coolant supply source 12 via a suitable valve structure 14 (eg illustrated in Fig. 1 such as one or more valves, regulators, pipes, etc.) which facilitates the supply of coolant from coolant supply source 12 to coolant section output nozzles 16 at one or more pressures and/or rates adequate flow rates.
[0025] A third section 18 of the frame is disposed adjacent to the cooling section 16 and comprises a plurality of rods that form a caged housing surrounding a controller 20. A pneumatic and/or electronic drive system 22 is also at least partially disposed in the interior of the third section and includes one or more motor-controlled rollers and/or any other suitable locomotive structure configured to mate with inner surface portions of pipe sections when the IHEX 10 is disposed within such pipe sections to control movement of IHEX 10 in forward and backward direction inside pipe structures during operations as described in this document. Drive system 22 is in communication (eg, wired or wireless communication) with controller 20 to facilitate control, via controller 20, of forward and backward movements of the IHEX 10 during operations (eg, control of a motor of the drive system 22 by the controller 20 controls the rotation of the roller(s) and thus forward and backward movement of the IHEX). The drive system 22 can be substantially enclosed within and/or as part of the IHEX frame, or alternatively include structure that extends beyond the frame. For example, drive system 22 may include a suitable cable structure that extends from the IHEX and through one or more pipe sections to an open end of a pipe section, where the cable structure is used to facilitate forward and/or backward movement of the IHEX within sections of pipe (for example, by means of a winch structure provided within the IHEX frame and/or at a location outside the pipe sections and connected with the cable structure). Optionally, rollers can also be provided at one end of the IHEX 10 (eg rollers 23 provided at an end end of the first frame section 11, as illustrated in Fig. 1) to enhance the mobility of the IHEX within sections of pipe .
[0026] The controller 20 includes at least one suitable processor that controls operations of the IHEX 10 by means of suitable control process logic instructions stored within a controller memory, as well as electronic signals provided remotely through another controlled device. per willing user at an adequate distance from the IHEX. In particular, the controller 20 is configured to communicate with a user-operable remote control device (e.g., a computer, a manual control device or any other suitable electronic device) by means of electronic signals, in which the signals Electronics are communicated via a wired or wireless link between the controller 20 and the remote control device. An exemplary embodiment of a remote control device is illustrated in Fig. 1 as a computer 30 (eg laptop computer, notepad (electronic notepad), personal digital assistant, smartphone, etc.) that communicates with the controller 20 via a wireless communication link (shown as the dashed line in Fig. 1). Electronic signal communications comprise two-way communications between the controller 20 and the remote control device, such that the controller 20 provides information to the remote control device (such as measured internal temperature information and/or other types of conditions measured inside the pipe sections as described in this document) as well as control information received to perform remote control operations from the IHEX.
[0027] One or more electronic sensors are provided at one or more suitable locations within the IHEX frame and are in communication (via wired or wireless communication link) with the controller 20 to provide information about conditions within the tube sections during operations. For example, one or more temperature sensors (eg IR temperature sensors, RTD temperature sensors, thermocouples, etc.) can be provided at one or more different locations in the first section 11, cooling section 16 and/or third section 18 of the IHEX 10, where temperature sensors measure temperature and provide such measured temperature information to controller 20 during operations. In another example, the pressure and/or flow rate sensors may be provided at one or more suitable locations within the coolant source tank(s) 12, within the valve structure 14 and /or near the cooling section outlet nozzles 14, where pressure and/or measured flow rate information is provided by such sensors to the controller 20 during operations. In addition, one or more chambers, controlled by the controller 20 (and remotely controlled by the remote control device), may also be provided at one or more suitable locations to facilitate a view inside the pipe sections (e.g., to determine a proper location to position the IHEX inside sections of pipe during operations). Exemplary pressure/temperature sensors and/or cameras are generally illustrated at locations 17 in Fig. 1. However, it is noted that any suitable number and different types of sensors and chambers can be provided at any number of different locations depending on a scenario specific for using IHEX.
[0028] The IHEX 10 additionally includes a power supply source suitable for providing electrical power to the controller 20, drive system 22, electronic sensors, valve structure 14 (for example, to electronically control one or more valves and, thereby controlling the flow of coolant from the coolant supply source 12 to the cooling section 16). The power supply source may be contained within the IHEX frame (for example, one or more batteries disposed in a battery pack provided within the third section 18 or at any other suitable location within the IHEX frame). Alternatively, the power supply source can be located outside the pipe sections, where an electrical cable connects the power supply source with the IHEX 10 to provide electrical power to the various components of the IHEX.
[0029] Cooling section 16 includes any suitable structure that facilitates cooling by means of heat exchange with the inner weld portion as well as other inner wall portions of the pipe sections. In the embodiment of Fig. 1, wherein cooling fluid from the cooling fluid supply source 12 is provided via valve section 14 to cooling section 16, the cooling section includes a plurality of nozzles disposed at around an outer periphery of the cooling section 16 to facilitate a flow of cooling fluid at a suitable flow rate (as controlled by the section valve 14 and cooling section nozzles nozzle design) from the cooling section at towards the inner surfaces at the weld joint portions or other inner portions of the two joined tube sections.
[0030] Operation of the IHEX 10 in connection with pipe welding operations is now described with reference to Figs. 2-4. In preparation for welding an open end of a first section of tube 50 to an opposite open end of a second section of tube 52, the two tube sections are axially aligned in position with each other and optionally held in such position. alignment with a connecting clamp (not shown in Figs. 2-4). A suitable connection clamp can be attached externally to opposite ends of the pipe sections to hold the sections in place relative to each other during the welding operation. Alternatively, an internal connection clamp can be used to hold the opposite ends in place during the welding operation. Both types of connection clamps (external and internal) are known in the pipe welding art and therefore are not described in more detail in this document. After the connection clamp is applied to hold the ends of the pipe sections in place with respect to each other, a weld joint 54 is formed at the connection weld location (i.e., at the two opposite open ends of the first and second sections. of tube). The weld seam 54 is formed in a manner, as known in the pipe welding art, in which techniques such as a root pass, hot pass, fill pass and cap are used to ensure that a joint. of suitable welding is formed. The formation of the weld joint 54 may involve preheating the opposite ends of the first and second tube sections 50, 52 to a minimum temperature of about 150°C. The remainder of the welding process can cause a temperature rise around the weld joint as high as about 300 °C. After the weld joint is formed, it is usually inspected by UT (ultrasonic tested) and/or x-ray to confirm the quality/integrity of the weld joint. UT inspection cannot be conducted above a temperature of about 50 °C to about 75 °C (Tmax), where Tmax is the highest temperature at which inspection can be effectively conducted. Furthermore, the UT inspection phase of the tube manufacturing process has to be interrupted until tube temperatures close to the weld are reduced to a temperature around such inspection temperature range. The cooling system of the present invention removes heat from the weld area in order to reduce the temperature of the tube weld area to at least below the acceptable UT inspection temperature (Tmax).
[0031] In certain applications, after inspection, a field joint coating (FJC) is also applied to external areas of the pipe sections surrounding the weld joint 54 to provide an insulation barrier to prevent or minimize corrosion in welding areas. Such insulation will generally only be effectively applied when the pipe temperature is above a minimum pipe temperature Tmin. Heat is therefore added to the weld area until the pipe temperature in the area to be insulated rises again to about 220 °C to 240 °C (Tmin), where Tmin is the lowest temperature at which the insulation can be Effectively applied in the insulation area. After insulation, the pipe can be coiled for field installation. However, at temperatures around Tmin, winding cannot be carried out effectively while maintaining the integrity of the weld. Therefore, the manufacturing process can be stopped again while allowing the tube temperature to gradually fall naturally (relative to ambient temperature) from Tmin to an acceptable winding temperature (Tmax), where Tmax is the highest/ maximum temperature at which the tube can be wound effectively. The cooling system of the present invention again removes heat from the weld area in order to reduce the temperature to a maximum temperature of about 50°C to about 75°C (Tmax) acceptable for effective winding. Therefore, the cooling system of the present invention reduces the temperature before inspection and/or reduces the temperature before winding in order to minimize the time it takes to weld, inspect, insulate and wind a length of pipe segments.
[0032] During the operational period when pipe sections 50, 52 are being welded together (with further application of the FJC), the IHEX 10 is loaded into an open end of pipe section 50 as illustrated in Fig. 2 Note that one or both tube sections 50, 52 may comprise a single tube unit. Alternatively, one of the pipe sections 50, 52 may comprise a plurality of pipe units welded together. In an embodiment where one of the pipe sections comprises a plurality of pipe units already welded together, it may be desirable to load the IHEX 10 into the pipe section comprising a single pipe unit (or the pipe section with the shortest length ) in order to reduce the time required for the IHEX to travel inside the pipe section to reach the connection weld location. Thus, in the exemplary embodiment, the tube section 50 may comprise a single tube unit being connected with a longer tube section represented by the tube section 52 (e.g. two or more tube units connected by means of welding joints).
[0033] The IHEX 10 is loaded at the open end of the pipe section 50 (i.e., the end opposite the open end opposite the open end of the pipe section 52 defining the connection weld location) in such a way that the first section 11 of the IHEX frame serves as the front end and thus first enters the interior of the pipe section 50. The IHEX 10 is moved (starting with the first section 11) within the pipe section 50 to a position suitable in the vicinity of the welding connection location, as illustrated in Fig. 3. In particular, the controller 20 (which can be remotely controlled by a user) controls the operation of the drive system 22 (for example, by controlling one or further motors, which move the rollers in contact with the tube section inner wall portions 50) to facilitate the advancement of the IHEX 10 into the tube section 50 and towards the connection weld location. Upon reaching a suitable location close to the connection weld location (for example, an IHEX location as illustrated in Fig. 3), the controller can control the drive system 22 so as to cease further movement of the IHEX until such time as that cooling operations should be started. For example, a camera mounted at a suitable location in the first section 11 and which is controlled by the controller 20 can provide video images to the remote control device so that a user can determine how close the IHEX is to the weld joint 54. Alternatively, or in combination with the video images provided by the camera, one or more temperature sensors suitably located in the IHEX frame can measure internal temperatures within the tube section 50 and provide such temperature information to the controller 20. or more measured temperatures reach a threshold value (eg around 100 °C or higher), this can provide an indication that the IHEX 10 has reached a location close to the weld joint 54. Any other suitable mechanism can also be used to provide an adequate indication of the location of the IHEX 10 within the pipe section 50 during its movement towards the weld weld location. exon.
[0034] Upon reaching the desired location that is near or near the connection weld location, a cooling operation can be performed after the weld joint 54 is formed and before the UT/x-ray inspection has taken place (if necessary) . In addition, a cooling operation can be performed after the pipe has been reheated to apply an external coating, and an FJC has been applied (if necessary). For example, in a scenario where the IHEX 10 reaches a suitable location within the pipe section 50 that is close to the connection weld location and prior to completion of the welding operation, the IHEX 10 is held in position and is ready to be used to cool down as soon as the welding or reheating operation is completed. The cooling operation is performed by first positioning the cooling section 16 in a suitable location (for example, in relation to the weld joint 54, as illustrated in Fig. 4). This can be achieved by advancing the IHEX 10 from its position in Fig. 3 to its position in Fig. 4 via the controller 20 (which is user-controlled via the remote control device) which controls the system drive 22 until the IHEX 10 is in the desired position. Movement to such a location (for example, as illustrated in Fig. 4) can be achieved based on video images within the tube sections 50, 52 being provided to the remote control device, the temperature sensor information being provided to the remote control device and/or by any other suitable mechanism.
[0035] Upon reaching a desired location within pipe sections 50, 52 (for example, where the cooling section is disposed very close to the weld joint 54 as illustrated in Fig. 4), the controller 20 (which can be user-controlled via the remote control device) controls the operation of the valve structure 14 (for example, via the control of one or more electronic valves) to facilitate a flow of coolant from the supply source of cooling fluid 12 at a pressure and/or flow rate suitable for the cooling section 16, wherein the cooling fluid flows from nozzles disposed in the cooling section 16 and suitably oriented to direct the flow of cooling fluid to away from the cooling section 16 and towards the inner wall surface portions inside the all sections 50, 52. The temperature sensor(s) monitors the internal temperature on the IHEX 10 inside of pipe sections 50, 52 and provides measured temperature information to the controller 20. Upon reaching a sufficient temperature within pipe sections 50, 52 (as measured by the temperature sensor(s), by For example, a temperature of Tmax °C or less), controller 20 can control valve structure 14 to cease flow of coolant to cooling section 16.
[0036] The IHEX 10 can be moved in forward or backward directions by controlling drive system 22 by controller 20 to provide additional cooling operations (as desired and based on measured inner tube temperatures) at other locations along inner wall surface portions of pipe section 50 and/or pipe section 52. When it has been determined that sufficient cooling has been achieved, the IHEX 10 can be withdrawn from the connected pipe sections 50, 52. For example, the IHEX 10 can be moved in the reverse direction, by controlling the drive system 22 by means of the controller 20, to move towards the free and open end of the pipe section 50 such that the third section 18 would first emerge from the pipe section 50. An additional pipe section can then be aligned (the IHEX can remain inside the section 50 like the new section if fitted to 50) with the free and open end of pipe section 50 (ag now connected via weld joint 54 with pipe section 52) to form a connecting weld location, and the process is then repeated, in which the IHEX 10 enters via the free and open end of the additional pipe section and is advanced towards the connection weld location to perform cooling operations on the weld joint to be formed between the pipe sections.
[0037] While the drive system 22 illustrated in the embodiment of Figs. 1-4 comprises rollers operable by a motor system which is controlled by the controller 20, the drive system for the IHEX can also implement any suitable mechanism capable of providing user-controlled movements of the IHEX within the pipe sections. For example, one or more cable/winch systems can be implemented, where one or more winches can be provided as part of the IHEX and/or located at one or more anchor points that are external to the pipe sections. A cable extends between each winch and a connection point (either at the IHEX or an external connection point for the pipe sections) to facilitate placement of the IHEX inside and/or removal of the IHEX from the pipe sections during operations.
[0038] It is noted that the operations described above in relation to IHEX can be performed for any types of connection welding applications between pipe sections in a piping system. For example, IHEX can be used in piping creation for marine and underwater applications as well as mainline applications. In a mainline application, pipe sections from 40 feet (12 meters) to 80 feet (24 meters) are welded together to form long "connecting" sections. In scenarios where a power cord may be required to control IHEX movement and/or other operations, the umbilical cord would need to be at least 240 feet (72 m) long. The operation of loading the IHEX into a pipe section and moving it into position for cooling after a welding operation (with optional UT/x-ray inspection and FJC application) takes place is similar to that previously described in relation to Figs. 1-4.
[0039] Another exemplary embodiment of an IHEX is illustrated in Fig. 5. In this embodiment, the IHEX 10-1 has a configuration similar to the IHEX 10 illustrated in Figs. 1-4 (where like numbers designate like components with the same or similar structure and features). However, the IHEX 10-1 connects with an internal connection clamp 60 to an end section 24 of the third frame section 18 of the IHEX. The inner connection bracket 60 includes a frame 62 of a suitable configuration that allows insertion of the connection bracket 60 within sections of pipe (e.g., pipe sections 50 and 52) and includes a section 64 that is configured to align and holding two open and opposite ends of pipe sections in place at the connection weld location (for example, by expanding to form a friction fit with the inner wall surface portions of the pipe sections at their opposite end when the connection clamp 60 is properly positioned inside pipe sections). A link member 80 (eg, a rod or spring member) connects one end 66 of the link clamp 60 with the end section 24 of the IHEX 10-1 frame.
[0040] In this mode, the IHEX 10-1 can be a towing member for the connection bracket 60. For example, the connection bracket 60, with IHEX 101 connected to it (via the connection member 80) can be inserted at its end 65 (i.e. one end of the frame that opposes the end of the frame 66 that connects with the IHEX 10-1 by means of connecting member 80) in a pipe section, wherein the clamp moves fitting 60 inside the pipe section also results in corresponding movement of the IHEX 10-1 inside the pipe section. Alternatively, the IHEX 10-1 can be inserted through its first frame portion 11 into the pipe section and then moved into position so as to also bring the connection bracket 60 into proper alignment with the connection weld location. between the two aligned tube sections. In another scenario, the IHEX 10-1 drive system 22 can be used to move the 60/IHEX 10-1 connection clamp combined structure to a suitable location within the pipe sections or, alternatively, any other mechanism. suitable drive can also be used to move such a structure within the pipe sections (eg one or more cable/winch systems).
[0041] The connection clamp 60 holds the ends of the pipe sections together until a weld joint is formed. After the formation of the weld joint (and formation of the FJC as needed), the connection clamp 60 can be disengaged from the inner wall surface portions of the pipe sections to facilitate movement of the IHEX 10-1 to a suitable location. (eg such that the cooling section 16 is aligned with the weld joint) to initiate internal cooling within the pipe sections.
[0042] A revised embodiment for connecting the IHEX to an internal connection clamp is illustrated in Fig. 6, in which a longer connecting member 82 (eg, an elongated rod) is provided to connect the IHEX 10-1 with the connecting bracket 60. The connecting member 82 has a longer length direction dimension than the connecting member 80 illustrated in Fig. 5, which minimizes heating of the IHEX 10-1 during welding operations (due to greater separation distance between IHEX and connection clamp).
[0043] For any embodiment of Figs. 5 and 6, the operation includes loading the connecting clamp 60 with IHEX 10-1 into one of the pipe sections and aligned so that the connecting clamp 60 holds the two opposite ends of the pipe sections in place at the weld location. of connection. After certain welding operations are performed (eg root pass and hot pass welding), the connection bracket 60 with IHEX 10-1 can be moved together and away from the connection weld location to prevent the exposure to additional heat from the ongoing welding process required to complete the weld joint. Alternatively, if the connecting member is of sufficient length (for example, a connecting member 82 of FIG. 6), the connecting bracket 60 with IHEX 10-1 can be moved such that the connecting bracket is in a side while the IHEX is on the other side of the connect weld location (with only the connecting member 82 being disposed directly under or very close to the connect weld location). After completion of welding and inspection(s) by UT/X-rays (if necessary), and additionally after any FJC has been applied, the connection bracket 60 with IHEX 10-1 can be moved into position such that the Cooling section 16 of the IHEX is very close with the weld joint and cooling operations can be performed (eg in a manner similar to that previously described in connection with the modality of Figs. 1-4).
[0044] The IHEX cooling section can be implemented with any type of cooling structure to quickly and/or effectively cool the tube sections in the newly formed weld joint and is therefore not limited to the illustrated exemplary modalities in Figs. 1-6. For example, the integrated cooling structure as part of the IHEX may include, without limitation, cooling fans that force air through the inner surface portions of pipe sections and/or through the heat exchange fins or other cooling members of the IHEX cooling section, discharge of liquid and/or gaseous fluids (e.g. cryogenic fluids, liquids, air) at appropriate pressures and temperatures from cooling section nozzles towards the inner surface portions of the tube sections, using fluids of cooling in a closed loop recirculation cycle and through the heat exchange structure of the cooling section, use thermoelectric cooling (eg by means of Peltier devices in direct contact with inner wall surface portions of the pipe sections) etc.
[0045] An example of another embodiment of an IHEX 110 is illustrated in Figs. 7A and 7B). The IHEX 110 is similar to the IHEX 10 of Figs. 1-4 (where like numbers designate like components with the same or similar structure and features), with a modification to the cooling section 116. In particular, the cooling section 116 comprises a heat sink that includes a plurality of cooling members. fin 118 disposed around the periphery and extending radially outward from a central support member 120 of the cooling section 116 and includes curved outer surface portions corresponding to the curved inner surface portions of the pipe sections toward which fins 118 extend. In particular, each fin member 118 includes a plurality of thin material sections extending from a central heat sink location of the cooling section 116 radially outwardly toward a curved end wall section of the cooling member. fin. The fin members 118 are constructed of a material with a suitable thermal conductivity (eg copper, aluminum etc.) to facilitate a high rate of heat transfer from the inner wall surface portions of the tube sections to the heatsink of heat from the cooling section 116. The fin members 118 include open channels 120 defined between adjacent thin material sections, wherein the open channels 120 extend in a lengthwise direction across the fin members. Electric fans 122 are mounted on central support member 123 and located in close proximity with ends of the fin members 118 and in alignment with the vane channels 120. The electric fans 122 provide an air flow through the vane channels 120 to cool the fin members 118 and thereby force heat by means of convection air currents from the heat sink of the cooling section 116. In addition, the fans 122 are in communication (e.g., via a wired or wireless communication link) with the controller 20 to facilitate selective fan operation during cooling operations. In addition, each fan 122 can be implemented with a variable operating speed, so as to selectively control the fan speed and corresponding air flow rate through vane members 118 differently and as needed during operation. of cooling.
[0046] Operation of the IHEX 110 of Figs. 7A and 7B is similar to that previously described for the embodiment of Figs. 1-4, regarding placement of the IHEX during welding operation and positioning for cooling after welding operations have been completed. During cooling, fans 122 can be activated to provide a flow of cooling air at one or more desired flow rates through channels 120 of fin members 118. Fin members 118 draw heat from the inner wall surface portions. of the tube sections 50, 52 (including the weld joint 54) towards the central support member 123 of the cooling section 116, and forced the air currents provided by the fans 122 to remove heat from the fin members 118 therefrom. mode, achieving a cooling of the pipe sections 50, 52 at the location of the cooling section 116. As described in previous embodiments, the temperature sensors of the IHEX can provide measured temperature information to the controller 20, and such measured temperature information can be used to control the operation of fans 122 (including changing fan speeds of one or more fans 122) during cooling operation. When a desired temperature is reached within the pipe sections, the fans 122 can be turned off via controller 20. The IHEX 110 can additionally be moved to different positions, as required, within the pipe sections for the purpose of cooling at different locations.
[0047] In another alternative embodiment illustrated in FIGS. 8A and 8B, an IHEX is provided with the same or substantially similar components as the embodiment previously described and illustrated in Figs. 1-4, with the exception that the cooling section has been modified. In particular, the IHEX 210 includes a cooling section 216 that includes a series of fin members 218 disposed along a periphery and extending radially outward from a central support member 223 of the cooling section 216, at that the fin members 218 have a similar outer shape or profile as the fin members 118 of the embodiment of Figs. 7A and 7B). Fin members 218 may also be constructed of a material with a suitable thermal conductivity (eg, aluminum or copper). However, each fin member 218 has a hollow, sealed interior to facilitate a flow of coolant fluid through the fin member. Each fin member 218 includes an inlet at one end and an outlet at the other end, and suitable tube structure is provided to facilitate a recirculating flow circuit of a coolant from a pump 212 to the fin member. , in which the coolant flows through the vane member and back to the pump 212. Any suitable coolant type (eg water, a cryogenic fluid such as liquid nitrogen or liquid argon, etc.) may be used.
[0048] The pump 212 (shown in Fig. 8A) can be positioned externally from the pipe sections, with supply and return flow ducts 214 extending between the pump 212 and a distribution frame 220 (shown in Fig. 8B). The distribution structure 220 includes a plurality of tube connections that connect the inlets and outlets of the fin members 218. In this way, the cooling section 216 facilitates heat exchange between the circulating flow of cooling fluid within the members. of fin 218 and the inner wall surface portions of the tube sections 50, 52 (eg at or near the weld joint 54) during cooling operations.
[0049] The 212 pump can be controlled (via a wired or wireless communication link) via the IHEX 210 controller. Alternatively, the 212 pump can be externally controlled (since it is easily accessible to the user) . The flow of coolant through the pump 212 can be controlled based on measured temperature information provided by one or more temperature sensors on the IHEX 210. Once a desired temperature has been achieved within the pipe sections, the pump can be disabled or turned off to cease recirculating coolant flow and facilitate movement of the IHEX 210 within the pipe sections.
[0050] A further embodiment of an IHEX 310 is illustrated in Figs. 9A and 9B. The IHEX is provided with the same or substantially similar components as the embodiment described above and illustrated in Figs. 1-4, with additional details provided for a cooling section 316. The cooling section 316 provides an exemplary configuration of spray nozzles 318 positioned around a central support member 323 of the cooling section. In particular, spray nozzles 318 are positioned in generally linear rows extending lengthwise along central support member 323. Suitable tube structure is provided at each end of each linear row of spray nozzles 318, at that the pipe structure connects with a manifold 320. The manifold 320 connects through a fluid duct 314 to a coolant pump 312 provided externally or outside the pipe sections. Coolant Pump Operation 312 provides a flow of coolant (eg, water, a cryogenic fluid such as liquid nitrogen or liquid argon, etc.) from a coolant source through the manifold 320 and out. from the spray nozzles 318 and toward the inner surface portions of the tube sections 50, 52 (including the weld joint 54). While the embodiment of Figs. 9A and 9B illustrate the pump 312 located outside the pipe sections 50, 52, it is noted that the cooling section 316 with spray nozzle alignment 318 can also be readily implemented in the embodiment of Figs. 1-4 (i.e., where the manifold 320 and spray nozzles 318 receive coolant from coolant source 12). The cooling operations of the IHEX 310 can be performed in a similar way as described for the previous modalities, where the pump 312 can be controlled through the IHEX 310 controller and/or externally and where the cooling fluid can be implemented based on the measured temperature information provided by the temperature sensors arranged on the IHEX 310.
[0051] Thus, modalities of an IHEX, as described in this document, provide improvements for pipe welding operations, including intensification of cooling of connected pipe sections by forming weld joints by providing internally controlled cooling within the pipe sections and reduce production time (since cooling can occur faster and more effectively, increasing the number of weld joints between pipe sections that can occur in a given period of time). Furthermore, the number of workstations associated with welding operations and also resources associated with such welding operations can be reduced. For example, the workspace required to weld pipe sections together can be reduced, and this can become particularly important in scenarios where workspace is limited (eg on barges or other watercraft)
[0052] While the present invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made to it without departing from the spirit and scope of this. Accordingly, it is intended that the present invention cover the modifications and variations of this invention provided they are encompassed within the scope of the appended claims and their equivalents. It should be understood that terms such as "top", "bottom", "front", "back", "side", "height", "length", "width", "bottom", "inside", "outer" and the like, as may be used herein, merely describe points of reference and do not limit the present invention to any particular orientation or configuration.

权利要求:
Claims (14)
[0001]
1. Internal heat exchanger (IHEX) (10, 110, 210, 310) for internal cooling of two welded tubes (50, 52), the internal heat exchanger characterized by the fact that it comprises: a detector (17) configured to detecting a position at or near a weld joint (54) between the two tubes; a drive system (22) configured to move the IHEX into a position within at least one of the tubes at or near the weld joint between the two tubes; a cooling section (16, 116, 216, 316) including a closed loop recirculation loop through which the cooling fluid circulates to cool interior surface portions of the two tubes at or near the weld joint between the two tubes; and a controller (20) in communication with the detector, the drive system and the cooling section and configured to control operation of the drive system to advance the IHEX into position within the at least one of the tubes at or near the joint. between the two tubes and activate the cooling section when the IHEX is in position inside the at least one of the tubes at or near the weld joint between the two tubes.
[0002]
2. IHEX according to claim 1, characterized in that it further comprises: a connecting member (80) configured to secure the IHEX to an internal connecting clamp (60).
[0003]
3. IHEX, according to claim 1, characterized in that the drive system comprises: at least one roller activated by a motor controlled by the controller and configured to move the IHEX inside the at least one of the tubes in directions to back and forth.
[0004]
4. IHEX, according to claim 1, characterized in that the drive system comprises: a cable and winch system, in which the winch is configured to anchor in an external location to at least one of the tubes and the cable extends between the winch and an IHEX support structure that includes the controller and cooling section.
[0005]
5. IHEX, according to claim 1, characterized in that the controller is additionally in communication with a remote control device in order to facilitate the selective activation of the cooling section through the remote control device.
[0006]
6. IHEX according to claim 1, characterized in that it further comprises: a frame including a first section (11) which includes the source of supply of cooling fluid (12), an intermediate section (16) which includes the cooling section and a third section (18) that includes the controller.
[0007]
7. IHEX according to claim 1, characterized in that the cooling fluid supply source comprises a cooling fluid pump (212, 312) located remotely from the cooling section, such that the coolant pump is located outside at least one of the pipes, when the cooling section is disposed inside the at least one of the pipes, and the coolant pump is connected to the cooling section by means of at least one fluid duct (314).
[0008]
8. IHEX according to claim 1, characterized in that the cooling section comprises: a plurality of fin members (118, 218) extending radially outward from and spaced around a periphery of a central support member (123, 223, 323) of the cooling section.
[0009]
9. IHEX according to claim 8, characterized in that at least one fin member includes at least one channel (120) extending through the fin member and the cooling section further comprises: at least one fan (122) that is controllable by the controller and is in proximity and aligned with the at least one fin member so as to direct a flow of air through the at least one channel of the at least one fin member.
[0010]
10. IHEX according to claim 8, characterized in that at least one fin member comprises a hollow casing including an inlet and an outlet, and the cooling section further comprises: a fluid flow circuit of circulation cooling to selectively flow the cooling fluid through the hollow casing of the at least one fin member.
[0011]
11. IHEX, according to claim 1, characterized in that it additionally comprises: one or more temperature sensors arranged in one or more locations along the IHEX and in communication with the controller; wherein the one or more temperature sensors measure a temperature at one or more locations within the at least one of the tubes and provide measured temperature information to the controller, and the controller is configured to selectively control the activation and operation of the cooling section based on the measured temperature information.
[0012]
12. IHEX, according to claim 1, characterized in that the detector comprises a camera.
[0013]
13. IHEX according to claim 1, characterized in that the detector comprises a sensor.
[0014]
14. IHEX according to claim 1, characterized in that the sensor comprises a temperature sensor.

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同族专利:

公开号 | 公开日

EP3123068A4|2017-11-22|

CA2942368A1|2015-10-01|

AU2015236037B2|2019-08-01|

MX2016012756A|2017-04-27|

CN106164556A|2016-11-23|

CN106164556B|2019-01-29|

AU2015236037A1|2016-09-29|

US9821415B2|2017-11-21|

US20150273636A1|2015-10-01|

RU2016142270A3|2018-11-15|

RU2686533C2|2019-04-29|

WO2015148765A1|2015-10-01|

MY179444A|2020-11-06|

CN110076417A|2019-08-02|

RU2019111189A|2019-06-28|

ZA201606315B|2019-11-27|

EP3123068A1|2017-02-01|

RU2016142270A|2018-04-28|

RU2019111189A3|2022-01-31|

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法律状态:
2020-01-14| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

2020-12-01| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|

2021-03-23| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

2021-06-01| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 26/03/2015, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

US14/228,708|US9821415B2|2014-03-28|2014-03-28|Internal pipeline cooler|

US14/228,708|2014-03-28|

PCT/US2015/022665|WO2015148765A1|2014-03-28|2015-03-26|Internal pipeline cooler|

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