• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Coupling ring for connecting a first sewage pipe (6) of thermoplastic material to a second sewage pipe (5) of thermoplastic material, the second pipe (5) having on its end a fitting being formed such that it has on its end a sleeve portion (5.1) having an inner and outer diameter larger than the basic diameter of the second pipe, the first pipe (6) being configured to protrude into the second pipe (5), the coupling ring (1) having a central sleeve portion (1.3) having on its first end in axial direction a first inwardly protruding ring portion (1.1) with a circumferential recess on its bottom side, , the first inwardly protruding ring portion (1.1) having an inner flank having an inner radius suitable for abutting with the outer circumference of the first pipe (6), the central sleeve portion (1.3) having on its second end in axial direction a second inwardly protruding ring portion (1.2) suitable for engaging with one end of the sleeve portion (5.1) of the second pipe (5), while a space is present between the central sleeve portion (1.3) of the coupling ring (1), the first inwardly protruding ring portion (1.1) and the second inwardly protruding ring portion (1.2) for receiving the sleeve portion (5.1) of the second pipe (5) and a welding ring (2) for connecting the pipes (5, 6), the length of the central sleeve portion (1.3) being dimensioned such that a click connection of the coupling ring (1) onto the second pipe (5) can be achieved, wherein the coupling ring (1) is equipped with one or more opening (4.1, 4.2) for leading through wires (3) of the welding ring (2). The invention also relates to a welding ring, connecting means for connecting two sewage pipes of thermoplastic material and a sewage pipe coupling.
    公开号:FI20185525A1
    申请号:FI20185525
    申请日:2018-06-08
    公开日:2019-12-09
    发明作者:Ari Hellstén；Timo Saarinen
    申请人:Bellapipe Oy；
    IPC主号:
    专利说明:

    COUPLING RING, WELDING RING AND CONNECTING MEANS FOR CONNECTING TWO SEWAGE PIPES OF THERMOPLASTIC MATERIAL AS WELL AS A SEWAGE PIPE COUPLING
    TECHNICAL BACKGROUND
    When connecting sewage pipes of polypropylene (PP) used for municipal and domestic drainage, industry and landfill construction, it is important to achieve a durable sealed connection.
    Different kind of connection types are known for connecting sewage pipes of thermoplastic material such as polypropylene or polyethylene. In one kind of sewage 10 pipe coupling two sewage pipes are connected via a coupling ring. In this kind of coupling, the coupling ring is coupled onto the fitting on the end of a second sewage pipe. A first pipe is then inserted into the assembly consisting of the second sewage pipe and the coupling ring. A gap present between the second sewage pipe, the coupling ring and the inserted first pipe is in the state of the art sealed 15 with a sealing ring, which in the state of the art is made of rubber material.
    OBJECTIVE OF THE INVENTION
    It is object of the invention to provide an alternative coupling type for sewage pipes of thermoplastic material that accomplishes a sealed and durable pipe connection. Furthermore, it is objective of the invention to provide a coupling of sewage pipes 20 using a coupling ring.
    SUMMARY OF THE INVENTION
    The objective of the invention is achieved with a coupling ring, a welding ring, connecting means and a sewage pipe coupling according to the independent claims.
    The invention concerns a coupling ring for connecting a first sewage pipe of ther25 moplastic material to a second sewage pipe of thermoplastic material, wherein the second pipe has on its end a fitting being formed such that it has on its end a sleeve portion having a inner and outer diameter larger than the basic diameter of the second pipe. The first pipe is configured to protrude into the second pipe, while the coupling ring has a central sleeve portion having on its first end in axial direc30 tion a first inwardly protruding ring portion with a circumferential recess on its bottom side, which bottom side is facing away from the first end in axial direction of the coupling ring towards a second end in axial direction. The first inwardly pro2
    20185525 prh 08 -06- 2018 truding ring portion has an inner flank having an inner radius suitable for abutting with the outer circumference of the first pipe, the while the central sleeve portion has on its second end in axial direction a second inwardly protruding ring portion suitable for engaging with one end of the sleeve portion of the second pipe, while 5 a space is present between the central sleeve portion of the coupling ring, the first inwardly protruding ring portion and the second inwardly protruding ring portion for receiving the sleeve portion of the second pipe and a welding ring for connecting the pipes. The length of the central sleeve portion is dimensioned such that a click connection of the coupling ring onto the second pipe can be achieved. The cou10 pling ring is equipped with one or more opening for leading through wires of the welding ring.
    As mentioned, the second pipe has on its end a fitting being formed such that it has on its end a sleeve portion having a diameter larger than the basic diameter of the second pipe. That means the sleeve portion on the end is formed with a larger 15 inner and outer diameter than the pipe part of the pipe such that a first pipe can be inserted into the second pipe in order to achieve a pipe coupling.
    Through this one or more opening the wires of the welding ring can be lead to the outside of the welding ring, where they can be connected to an electric power source for welding. By leading the wires to the outside through an opening in the 20 coupling ring, damage of the wires by an inserted pipe end is prevented. Also bending of the wire ends to a wrong direction is prevented, thus the wires are fixed in a position suitable for connection to an electrical power source. The implementation of the coupling ring is such that a welding ring can be arranged in the coupling ring instead of a rubber ring. A pipe coupling sealed with a welding ring is 25 especially durable and can withstand well exposition to chemicals.
    In an embodiment the coupling ring for connecting two sewage pipes thermoplastic is equipped with two openings for the wires of a welding ring.
    In another embodiment the coupling ring for connecting two sewage pipes of thermoplastic material is equipped with two holes for the wires of a welding ring.
    Yet another possible embodiment of a coupling ring according to the invention has the one or more opening for leading through wires of the welding ring situated on a surface of the first inwardly protruding ring portion of the coupling ring being which surface is directed in axial direction outwardly. Preferably the one or more opening is situated in the coupling ring in a position that is adjacent to the position of at
    20185525 prh 08 -06- 2018 tachment of the wires of a welding ring positioned in the coupling ring, such that the distance from the attachment of the wires on the welding ring to the opening is as short and direct as possible, in order to avoid twisting and damaging of the wires. The coupling ring can be implemented such that the second inwardly pro5 truding portion has one or more circumferential recesses directed radially outward from its inner side. The recesses can have a minimal width directed radially outward of approximately 0.5 mm, but they can also have such a width that it reaches the inner wall of the central sleeve portion of the coupling ring. Preferably the width of the recess is 1 ...4 mm , preferably approximately 2 mm.
    It is an option that the coupling ring is equipped with one or more grooves penetrating the wall of the coupling ring directed in axial direction which start from the second side of the coupling ring having the second inwardly protruding portion. The length of these grooves is preferably 10...15 mm.
    A recess or groove in the coupling ring is advantageous for easy coupling of the 15 coupling ring, as they make the coupling ring more flexible.
    A welding ring for connecting a first sewage pipe of thermoplastic material and a second sewage pipe of thermoplastic material for use with a coupling ring and configured to be fitted into a space of the coupling ring between a first inwardly protruding portion, a second inwardly protruding portion and central sleeve por20 tion, comprises according to the invention a thermoplastic inner expansion hose equipped with a cavity and a resistance wire on the outer surface of the expansion hose and which is, in turn, encased by a plastic sheet layer, which - after melting - provides a firmly bonded joint of the abutting pipes. According to the invention the welding ring has an essentially rectangular or angular cross-section before 25 melting.
    According to one embodiment the resistance wire is wound spirally around the expansion hose.
    According to another embodiment of the invention the edges of the cross-section of the welding ring are rounded.
    Connecting means for connecting a first sewage pipe of thermoplastic material and a second sewage pipe of thermoplastic material according to the invention comprise a coupling ring according to the invention and a welding ring according to the invention.
    20185525 prh 08 -06- 2018
    The welding ring can be attached to the coupling ring for example by means of a plastic sheet piece that has been attached for example by melting or by welding.
    A sewage pipe coupling according to the invention comprises a coupling ring according to the invention which is engaged with a a fitting on an end of a second 5 pipe, a first pipe placed within the coupling ring. The sewage pipe coupling further comprises a welding ring according to the invention arranged in a circumferential gap between the first pipe, the second pipe and the coupling ring.
    In one embodiment of the sewage pipe coupling, the wires of the welding ring are lead to the outside through at least one opening in the coupling ring.
    A permanently sealed, durable and root proof connection of thermoplastic, such as polypropylene sewage pipes using a coupling ring can be achieved by using a welding ring that is inserted into a space in a coupling ring in which usually a rubber seal is placed. In order to be able to insert the welding ring into the coupling, a rubber seal present in the space of the coupling ring first has to be removed and 15 the welding ring can then be installed. One advantage of connecting sewages pipes with welding rings is that that kind of connection can withstand well longitudinal forces. It is also more resistant against chemicals within the pipe or from the outside compared to a conventional sealing with a rubber sealing.
    Due to the form of implementation of the coupling ring and the welding ring, the 20 coupling ring with the added welding ring can be easily installed and problems in the installation and damage of the wires is prevented. The shape of the welding ring is adapted to the pipe coupling type yet still shaped such that reliable welding and a durable connection is achieved.
    The parts according to the invention are easy to install and yet a tightly sealed and 25 durable connection of pipes using a coupling ring is accomplished.
    FIGURES
    Figure 1 shows a side view of a welding ring with welding wires and a coupling ring
    Figure 2 shows a side view of a sewage pipe coupling with a section A-A
    Figure 3 shows a top view of the sewage pipe coupling of figure 2
    20185525 prh 08 -06- 2018
    Figure 4 shows a cross-sectional view of the sewage pipe coupling of figure 2 along section A-A
    Figure 5 shows an enlarged view of detail B of the sewage pipe coupling crosssectional view of figure 4
    DETAILED DESCRIPTION OF THE INVENTION
    The invention concerns a coupling ring, a welding ring and connecting means for connecting a first and a second sewage pipe as well as a sewage pipe coupling. The first and the second sewage pipe are connected with the aid of a coupling ring which is attachable to the second pipe with a click connection. In a sewage pipe 10 coupling according to the invention, one end of one pipe has a coupling sleeve portion having an inner and outer diameter larger than the inner and outer diameter of the remaining pipe, in order to allow connection to another pipe by insertion of the other pipe and by using a coupling ring. The coupling is sealed by a welding ring, which has been inserted into a space in the coupling ring prior to installation 15 of the pipes and which replaces conventional rubber sealing rings.
    A welding ring as used in the invention has a thermoplastic inner expansion hose made of a shape memory polymer having an inner cavity. A resistance wire is preferably spirally wound around the expansion hose and is encased in a plastic sheet layer. The plastic sheet consists of a material that corresponds to the plastic 20 material of the pipes to be connected, common raw materials being for example polyethylene (PE) and polypropylene (PP). During the fabrication process, the welding ring has been heated and pressed into a flattened shape such that the expansion hose has been flattened and its originally circular cross-section is now elliptical. During the fabrication process the welding ring’s outer shape is formed as 25 well. After installation of the welding ring into the wanted site, the welding process can be started. Connection wires of the resistance wires are connected to a power source which supplies voltage to the wires and thus heating of the surrounding layers occurs. Upon heating, the expansion hose expands back to its original circular shape, thus pressing the surrounding layers outwards. The heating of the re30 sistance wires also melts the surrounding plastic sheet layer, which is simultaneously being pressed against the surrounding objects, thus the plastic pipes and the coupling ring. Thus a tight bond between the parts and the ring is achieved.
    The invention and its components will be explained in more detail with reference to 35 the figures.
    20185525 prh 08 -06- 2018
    Figure 1 shows a side view of a coupling ring 1 and a welding ring 2 according to an embodiment of the invention. In the figure, also wires 3 of the welding ring 2 can be seen.
    The ends of the wires 3 can be connected to an external power source in order to supply current to the resistance wires for heating and melting an outer layer of the welding ring and thus for achieving a bond of the surrounding pipe parts.
    In figure 2 one embodiment of the invention can be seen. The drawing shows a truncated side view of a sewage pipe coupling according to the invention. It com10 prises a coupling ring 1 which in the embodiment is equipped with two openings for leading through wires 3 of a welding ring 2 that can be installed on the inside of the coupling ring 1, one opening for each wire. The coupling ring 1 is attached to the fitting on an end of a sewage pipe 5. A first sewage pipe 6 has been inserted into the coupling ring for forming a sewage pipe coupling.
    Figure 3 shows a top view of the embodiment of figure 2. In the figure, the top surface of the coupling ring 1 can be seen. In this embodiment the coupling ring is equipped with a first hole 4.1 for leading through a first wire of a welding ring and a second hole 4.2 for leading through a second wire of the welding ring.
    Figure 4 shows a cross-sectional view of a sewage pipe coupling according to the 20 invention. A first pipe 6 to be connected to the second pipe 5 has been inserted into the assembly formed by the second pipe 5 and the coupling ring 1. The view shows a coupling 1 ring being attached to a fitting portion on an end of a second polypropene pipe 5.
    A welding ring 2 has been inserted in this circumferential gap between the first 25 pipe 6, the second pipe 5 and the coupling ring 1 for sealing the connection between the two pipes. In the drawing, the sewage pipe coupling is presented in the state before heating the welding ring and thus before melting of the layer surrounding the heating wire. It can be seen that the welding ring has an essentially angular shape, which is important in order to be able to easily fit the welding ring 2 30 into the present gap. Due to the production process of the welding ring, its edges might be rounded, however only with a radius of 0.1 -5 mm.
    Wires 3 of the welding ring 2 are lead through to the outside through an at least one opening on one outer surface of coupling ring 1. By leading the wires to the outside of the coupling ring 1 in that way, the wires are protected from damage
    20185525 prh 08 -06- 2018 which could otherwise occur for example when the first pipe 6 is inserted into the assembly.
    Figure 5 shows an enlarged partial view of the cross-sectional view of figure 4. It can be seen that the polypropene pipe 5 has on its end a sleeve portion 5.1, and a protruding ring portion 5.3 which is spaced apart from the sleeve portion in a direction away from the end. It can be seen how an inwardly protruding ring portion 1.2 on a second side of the ring 1 is engaged with a recess portion 5.2, which is formed between the sleeve portion 5.1 and the ring portion 5.3. The thickness of the second inwardly protruding ring portion 1.2 is thus dimensioned slightly smaller 10 than the space between the sleeve portion 5.1 and the protruding ring portion 5.3 of the second pipe 5 so that it is suitable for engaging in the space. The sleeve portion 5.1 of the second pipe 5 abuts against a circumferential recess of an inwardly protruding ring portion 1.1 of the coupling ring. The length in axial direction of the central sleeve portion 1.3 of the coupling ring 1 is dimensioned such that 15 when the sleeve portion 5.1 is inserted into the coupling ring, the protruding ring portion 1.2 of the coupling ring can be snapped into the recess portion 5.2, thus achieving a releasable locked connection of the parts.
    In radial direction, the length of the protruding ring portion 1.2 is dimensioned such that it abuts against recess portion 5.2 when the second pipe 5 has been snapped 20 into the coupling ring. The dimension of the inner diameter of a protruding portion
    1.1 of the coupling ring 1 is designed such that it approximately corresponds to the outer diameter of a first inserted pipe 6, such that the first pipe can be inserted into the coupling ring and a tight fitting can be achieved. In the picture it can be seen that the welding ring 2 has an expansion hose on the inside. A welding ring 2 ac25 cording to the invention consists substantially of a welding ring 2 having a thermoplastic inner expansion hose 7 with a cavity, a resistance wire being preferably wound spirally around the expansion hose and being, in turn, enclosed by a plastic sheath. In the figure the welding ring is presented in its unexpanded state before welding. When voltage is applied and the resistance wire is heated, the inner ex30 pansion hose extends thus inflates due to its material, while the outer plastic sheath begins to melt. Due to the expansion of the inner expansion hose, the outer plastic sheet is pressed outwards against the surrounding parts, i.e. the pipe and the coupling ring, such that the welding ring essentially fills and thus seals a gap between the sleeve ring 5.1 of the second pipe 5, the protruding ring portion 1.1 of 35 the coupling ring 1 and the first pipe 6, thus achieving a firmly bonded joint of the abutting plastic pipes after melting. The pipes are thus sealed by welding the two surfaces and the welding ring together.
    20185525 prh 08 -06- 2018
    List of references coupling ring welding ring wires of the welding ring
    4.1 Through-hole for wire of welding ring
    4.2 through-hole for wire of welding ring second pipe
    5.1 sleeve portion
    5.2 recess portion
    5.3 protruding ring portion first pipe thermoplastic inner expansion hose plastic sheet layer
    权利要求:
    Claims (13)
    [1] 1. Coupling ring (1) for connecting a first sewage pipe (6) of thermoplastic material to a second sewage pipe (5) of thermoplastic material, the second pipe (5) having on its end a fitting being formed such that it has on its end a sleeve portion (5.1)
    5 having a larger inner and outer diameter than the basic diameter of the second pipe, the first pipe (6) being configured to protrude into the second pipe (5), the coupling ring (1) having a central sleeve portion (1.3) having on its first end in axial direction a first inwardly protruding ring portion (1.1) with a circumferential recess on its bottom side, which bottom side is facing away from the first end in axial di10 rection of the coupling ring (1) towards a second end in axial direction, the first inwardly protruding ring portion (1.1) having an inner flank having an inner radius suitable for abutting with the outer circumference of the first pipe (6), the central sleeve portion (1.3) having on its second end in axial direction a second inwardly protruding ring portion (1.2) suitable for engaging with one end of the sleeve por15 tion (5.1) of the second pipe (5), while a space is present between the central sleeve portion (1.3) of the coupling ring (1), the first inwardly protruding ring portion (1.1) and the second inwardly protruding ring portion (1.2) for receiving the sleeve portion (5.1) of the second pipe (5) and a welding ring (2) for connecting the pipes (5, 6), the length of the central sleeve portion (1.3) being dimensioned 20 such that a click connection of the coupling ring (1) onto the second pipe (5) can be achieved, wherein the coupling ring (1) is equipped with one or more opening (4.1,4.2) for leading through wires (3) of the welding ring (2).
    [2] 2. Coupling ring (1) according to claim 1, characterized in that the coupling ring (1) is equipped with two openings for the wires (
    [3] 3) of a welding ring (2).
    25 3. Coupling ring (1) according to any of the previous claims, characterized in that the coupling ring (1) is equipped with two holes (4.1, 4.2) for the wires (3) of a welding ring (2).
    [4] 4. Coupling ring (1) according to any of the previous claims, characterized in that the one or more opening for leading through wires (3) of the welding ring (2) is sit-
    30 uated on a surface of the first inwardly protruding ring portion (1.1) of the coupling ring (1) which surface is directed in axial direction outwardly.
    [5] 5. Coupling ring (1) according to any of the previous claims, characterized in that the second inwardly protruding portion (1.2) has one or more recesses directed radially outward from its inner side.
    20185525 prh 08 -06- 2018
    [6] 6. Coupling ring (1) according to any of the previous claims, characterized in that the coupling ring (1) is equipped with one or more grooves penetrating the wall of the coupling ring (1) directed in axial direction which start from the second side of the coupling ring (1) having the second inwardly protruding portion (1.2).
    5
    [7] 7. Welding ring (2) for connecting a first sewage pipe (6) of thermoplastic material and a second sewage pipe (5) of thermoplastic material for use with a coupling ring according to claims 1-6 and configured to be fitted into a space of the coupling ring between a first inwardly protruding portion (1.1), a second inwardly protruding portion (1.2) and the central sleeve portion (1.3), wherein the welding ring (2) 10 comprises a thermoplastic inner expansion hose (7) equipped with a cavity, a resistance wire on the outer surface of the thermoplastic inner expansion hose (7) and being, in turn, encased by a plastic sheet layer (
    [8] 8), which - after melting provides a firmly bonded joint of the abutting pipes (5, 6), wherein before melting the welding ring (2) has an essentially rectangular or angular cross-section.
    15 8. Welding ring according to claim 7, characterized in that the resistance wire is wound spirally around the thermoplastic inner expansion hose (7).
    [9] 9. Welding ring according to claim 7 or 8, characterized in that the edges of the cross-section are rounded.
    [10] 10. Connecting means for connecting a first sewage pipe (6) of thermoplastic ma20 terial and a second sewage pipe (5) of thermoplastic material, comprising a coupling ring (1) according to any of claims 1-6 and a welding ring (2) according to any of claims 7-9.
    [11] 11. Connecting means according to claim 10, characterized in that the welding ring (2) is attached to the coupling ring (1) such that a gap is present between the
    25 inner wall of the coupling ring (1) and the welding ring (2).
    [12] 12. Sewage pipe coupling comprising a coupling ring (1) according any of claims 1-6 engaged with a fitting on anend of a second pipe (5) , a first pipe placed (6) within the coupling ring (1) and a welding ring (2) according to any of claims 7-9 arranged in a circumferential gap between the first pipe (6), the second pipe (5)
    30 and the coupling ring (1).
    [13] 13. Sewage pipe coupling according to claim 12, characterized in that the wires (3) of the welding ring (2) are lead to the outside through at least one opening in the coupling ring (1).
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    同族专利:
    公开号 | 公开日
    FI128727B|2020-11-13|
    DE102019115298A1|2019-12-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2020-11-13| FG| Patent granted|Ref document number: 128727 Country of ref document: FI Kind code of ref document: B |
    优先权:
    申请号 | 申请日 | 专利标题
    FI20185525A|FI128727B|2018-06-08|2018-06-08|Coupling ring and connecting means for connecting two sewage pipes of thermoplastic material as well as a sewage pipe coupling|FI20185525A| FI128727B|2018-06-08|2018-06-08|Coupling ring and connecting means for connecting two sewage pipes of thermoplastic material as well as a sewage pipe coupling|
    DE102019115298.4A| DE102019115298A1|2018-06-08|2019-06-06|Coupling ring, welding ring and connecting means to connect two sewage pipes of thermoplastic material together and sewage pipe coupling|
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