Hollow PVC corrugated pipe capable of being grouted

Abstract

The utility model relates to the technical field of corrugated pipes, in particular to a hollow PVC corrugated pipe capable of being grouted, and adopts the technical scheme that the hollow PVC corrugated pipe comprises a pipe body, a first connecting piece and a second connecting piece are fixedly mounted at two ends of the pipe body respectively, the pipe body comprises an outer pipe and an inner pipe, and the outer pipe is not in contact with the inner pipe; one side, opposite to the inner pipe, of the outer pipe is filled with foamed polypropylene foam; the first connecting piece and the second connecting piece are fixedly connected with the outer pipe inner pipe on the same side, an inserting pipe is arranged at the end, deviating from the pipe body, of the first connecting piece, an inserting sleeve is arranged at the end, deviating from the pipe body, of the second connecting piece, the inserting pipe and the inserting sleeve are matched in size, and the inserting pipe and the inserting sleeve are movably inserted. The heat preservation performance of the pipe is enhanced, the heat preservation performance of the pipe is enhanced, the problem that the thickness of the heat preservation layer is affected by the inner diameter of the outer corrugated pipe is solved, and a more flexible and effective heat preservation solution is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of corrugated pipes, in particular to a hollow groutable PVC corrugated pipe. Background Art

[0002] Double-wall corrugated pipe is an ideal choice for underground pipeline laying due to its smooth inner surface, large flow rate, light weight and corrosion resistance. It is an optimal alternative to traditional pipes.

[0003] After extensive searching, the publication number CN205479792U was found, which disclosed a PVC-U double-wall corrugated pipe. A skeleton reinforcement layer and an insulation layer were added between the outer corrugated pipe and the inner straight pipe, which increased the strength and thermal insulation performance of the pipe and could effectively prevent the pipe body from being damaged by external impact force.

[0004] In the existing technology, a skeleton reinforcement layer and an insulation layer are added between the inner straight pipe and the outer corrugated pipe. However, due to the influence of the inner diameter of the outer corrugated pipe, the design thickness of the insulation layer is relatively thin, which results in a thin insulation layer in actual use and is difficult to achieve a good insulation effect. Therefore, a hollow groutable PVC corrugated pipe is needed to solve the above problem. Utility Model Content

[0005] The purpose of the utility model is to provide a hollow groutable PVC corrugated pipe, which has the advantage of enhancing the thermal insulation performance of the pipe and solves the problem that the thickness of the insulation layer is affected by the inner diameter of the outer corrugated pipe, thereby resulting in poor thermal insulation effect of the pipe.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a hollow groutable PVC corrugated pipe, comprising a pipe body, wherein a first connecting member and a second connecting member are fixedly mounted at both ends of the pipe body, the pipe body comprising an outer pipe and an inner pipe, the outer pipe not being in contact with the inner pipe, and the outer pipe being filled with expanded polypropylene foam on the side opposite to the inner pipe;

[0007] The first connector and the second connector are respectively fixedly connected to the outer tube and the inner tube on the same side. The end of the first connector away from the tube body is provided with a plug-in tube, and the end of the second connector away from the tube body is provided with a plug-in sleeve.

[0008] Preferably, the outer tube is designed with a PVC corrugated tube structure, matching the length of the inner tube. First positioning holes are formed in a circular array on the outer wall at each end of the outer tube. The outer tube is made of PVC and designed as a corrugated tube structure to provide additional strength and flexibility. The length of the outer tube precisely matches the inner tube, ensuring consistency and coordination of the tube body. First positioning holes are formed in a circular array on the outer wall at each end of the outer tube to ensure precise positioning and fixation during the connection process.

[0009] Preferably, the inner tube is designed with PVC material and has a smooth inner wall. The outer wall of the inner tube is provided with reinforcing ribs with a spiral structure design. The reinforcing ribs do not contact the inner wall of the outer tube. The outer walls at both ends of the inner tube are respectively provided with second positioning holes in a circular array. The second positioning holes match the positions of the first positioning holes, and the second positioning holes match the aperture size of the first positioning holes. In the design, the inner tube is also made of PVC material, and its inner wall is designed to be smooth to reduce the resistance during fluid flow. The outer wall of the inner tube is designed with reinforcing ribs with a spiral structure. These reinforcing ribs not only enhance the structural strength of the tube body, but also avoid internal friction and reduce wear because they are designed not to contact the inner wall of the outer tube. The outer walls at both ends of the inner tube are also designed with second positioning holes in a circular array. These holes match the first positioning holes of the outer tube in position and aperture size, ensuring the accuracy and stability of the connection.

[0010] Preferably, the first connector and the second connector are matched in size, and both the first connector and the second connector have holes on the inside and outside and have positioning pins passing through them. The positioning pins pass through the first positioning hole and the second positioning hole at the same time, and a screw hole is provided at one end of the positioning pin and a mounting screw is threadedly installed. In the design, the first connector and the second connector match each other in size to ensure the connection consistency at both ends of the tube body. These connectors are designed with holes on the inside and outside sides to allow the positioning pins to pass through and achieve precise positioning. The positioning pins pass through the first positioning hole of the outer tube and the second positioning hole of the inner tube at the same time, ensuring a stable connection of the tube body. A screw hole is designed at one end of the positioning pin and a mounting screw is threadedly installed to achieve a firm fixation.

[0011] Preferably, the mounting screw is screwed into the screw hole on the locating pin from the outside of the first or second connector, and the nut of the mounting screw is hexagonal in design and larger than the diameter of the first locating hole. In this design, the mounting screw is screwed into the screw hole on the locating pin from the outside of the first or second connector, and the nut is hexagonal in design. This design not only provides a larger contact area but also facilitates tool tightening. The nut of the mounting screw is larger than the diameter of the first locating hole, ensuring that the nut will not fall off during tightening, providing additional safety.

[0012] Preferably, the plug-in tube and the splice sleeve match in size, allowing them to be flexibly inserted. In this design, a plug-in tube is provided at one end of the first connector, while a splice sleeve is provided at one end of the second connector. These two dimensions match each other, allowing them to be flexibly inserted. This design not only provides a flexible connection method but also allows for quick disconnection and reconnection of adjacent pipes when needed.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The tube body of the utility model consists of an outer tube and an inner tube, with a hollow layer formed between them. This hollow layer can be filled with expanded polypropylene foam, a material with excellent thermal insulation properties that effectively isolates the heat exchange between the inner and outer tubes. The expanded polypropylene foam filling the hollow layer is lightweight, high-strength, and has excellent thermal insulation properties. It can expand freely within the hollow layer, forming a uniform and continuous insulation layer that is not restricted by the inner diameter of the outer tube, thereby providing better thermal insulation. Due to the presence of the hollow layer, the filling amount of expanded polypropylene foam can be adjusted as needed, allowing for flexible control of the thickness of the insulation layer. This design allows the thickness of the insulation layer to be adjusted according to specific insulation requirements in different application scenarios to achieve optimal thermal insulation. The outer tube adopts a PVC corrugated pipe design, providing additional strength and flexibility. The outer wall of the inner tube is designed with spiral reinforcement ribs. These ribs enhance the structural strength of the tube body while preventing contact with the inner wall of the outer tube, reducing wear. The design of the first and second connectors allows for precise connection and positioning via the plug-in tube and plug-in sleeve. This precise connection helps maintain the pipe's tightness, preventing heat loss through the joints and further improving thermal insulation. The plug-in design of the first and second connectors makes installation and maintenance of the pipe more flexible and convenient. This design allows for quick disassembly and reconnection of the pipe when needed, facilitating repair and maintenance while also helping to maintain the pipe's thermal insulation. These design features not only enhance the pipe's thermal insulation performance but also address the issue of the insulation layer's thickness being affected by the inner diameter of the outer corrugated pipe, providing a more flexible and effective thermal insulation solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 For the utility model Figure 2 Schematic diagram of the structure at the middle enlargement;

[0018] Figure 4 This is a schematic diagram of the inner tube structure of the utility model;

[0019] Figure 5 This is a schematic structural diagram of the first connecting member and the second connecting member of the utility model;

[0020] Figure 6 This is a schematic diagram of the inner tube structure of the present utility model.

[0021] In the figure: 1. tube body; 11. outer tube; 111. first positioning hole; 12. inner tube; 121. reinforcing rib; 122. second positioning hole; 2. first connecting piece; 21. plug-in tube; 3. second connecting piece; 31. plug-in sleeve; 4. positioning pin; 5. mounting screw. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figures 1 to 6 As shown, the utility model provides an embodiment: a hollow groutable PVC corrugated pipe, comprising a pipe body 1, with a first connecting member 2 and a second connecting member 3 fixedly mounted at both ends of the pipe body 1, the pipe body 1 comprising an outer pipe 11 and an inner pipe 12, the outer pipe 11 and the inner pipe 12 not in contact, and the opposite side of the outer pipe 11 and the inner pipe 12 is filled with foamed polypropylene foam;

[0025] The first connecting member 2 and the second connecting member 3 are respectively fixedly connected to the outer tube 11 and the inner tube 12 on the same side. The end of the first connecting member 2 facing away from the tube body 1 is provided with a plug tube 21, and the end of the second connecting member 3 facing away from the tube body 1 is provided with a plug sleeve 31.

[0026] Specifically, the tube body 1 is composed of an outer tube 11 and an inner tube 12, and a hollow layer is formed between the two. This hollow layer can be filled with foamed polypropylene foam, which has good thermal insulation properties and can effectively isolate the heat exchange between the inner and outer tubes 11. The foamed polypropylene foam filled in the hollow layer is a lightweight, high-strength material with excellent thermal insulation properties. It can expand freely in the hollow layer to form a uniform and continuous insulation layer, which is not restricted by the inner diameter of the outer tube 11, thereby providing a better thermal insulation effect. Due to the existence of the hollow layer, the filling amount of the foamed polypropylene foam can be adjusted as needed, thereby flexibly controlling the thickness of the insulation layer. This design allows the thickness of the insulation layer to be adjusted according to specific insulation requirements in different application scenarios to achieve the best insulation effect. The outer tube 11 adopts a PVC corrugated pipe structure design, which provides additional strength and flexibility. The outer wall of the inner tube 12 is designed with reinforcing ribs 121 with a spiral structure. These reinforcing ribs 121 enhance the structural strength of the tube body 1 while avoiding contact with the inner wall of the outer tube 11 and reducing wear. The design of the first connector 2 and the second connector 3 allows for precise connection and positioning through the plug-in tube 21 and the plug-in sleeve 31. This precise connection method helps maintain the sealing of the tube body 1, prevents heat from being lost through the connection, and further improves the thermal insulation performance. Due to the plug-in design of the first connector 2 and the second connector 3, the installation and maintenance of the tube body 1 become more flexible and convenient. This design allows the tube body 1 to be quickly disassembled and reconnected when needed, facilitating repair and maintenance, while also helping to maintain the thermal insulation performance of the tube body 1. Through these design features, the hollow groutable PVC corrugated pipe not only enhances the thermal insulation performance of the pipe, but also solves the problem of the thickness of the insulation layer being affected by the inner diameter of the outer corrugated pipe, providing a more flexible and effective thermal insulation solution.

[0027] Example 2

[0028] In order to improve the accuracy of positioning and fixing of the outer tube and the inner tube, Figure 2 、 Figure 4 and Figure 6 As shown, in this embodiment, the outer tube 11 is designed as a PVC corrugated tube. The length of the outer tube 11 matches that of the inner tube 12, and the outer wall at each end of the outer tube 11 is provided with first positioning holes 111 in a circular array. The outer tube 11 is made of PVC material and designed as a corrugated tube structure to provide additional strength and flexibility. The length of the outer tube 11 precisely matches that of the inner tube 12, ensuring the consistency and coordination of the tube body 1. The outer wall at each end of the outer tube 11 is designed with a circular array of first positioning holes 111, which are used for precise positioning and fixation during the connection process.

[0029] Furthermore, the inner tube 12 is designed with PVC material and has a smooth inner wall. The outer wall of the inner tube 12 is provided with reinforcing ribs 121 with a spiral structure. The reinforcing ribs 121 do not contact the inner wall of the outer tube 11. The outer walls of the inner tube 12 at both ends are provided with second positioning holes 122 in a circular array. The second positioning holes 122 match the positions of the first positioning holes 111, and the second positioning holes 122 match the aperture size of the first positioning holes 111. In the design, the inner tube 12 is also made of PVC material, and its inner wall is designed to be smooth to reduce resistance during fluid flow. The outer wall of the inner tube 12 is designed with reinforcing ribs 121 with a spiral structure. These reinforcing ribs 121 not only enhance the structural strength of the tube body 1, but also, because they are designed not to contact the inner wall of the outer tube 11, avoid internal friction and thus reduce wear. The outer walls of the inner tube 12 at both ends are also designed with second positioning holes 122 in a circular array. These holes match the first positioning holes 111 of the outer tube 11 in position and aperture size, ensuring the accuracy and stability of the connection.

[0030] Example 3

[0031] In order to improve the stability of the inner and outer tubes after connection and facilitate the rapid disassembly and assembly of adjacent tubes, Figure 2 、 Figure 3 and Figure 5 As shown, in this embodiment, the first connecting member 2 and the second connecting member 3 are matched in size, and both the first connecting member 2 and the second connecting member 3 have openings on both the inside and outside sides and have a positioning pin 4 passing through them. The positioning pin 4 passes through the first positioning hole 111 and the second positioning hole 122 at the same time. A screw hole is opened at one end of the positioning pin 4 and a mounting screw 5 is threadedly installed. In the design, the first connecting member 2 and the second connecting member 3 match each other in size to ensure the connection consistency at both ends of the tube body 1. These connecting members are designed with openings on both the inside and outside sides to allow the positioning pin 4 to pass through and achieve precise positioning. The positioning pin 4 passes through the first positioning hole 111 of the outer tube 11 and the second positioning hole 122 of the inner tube 12 at the same time, ensuring the stable connection of the tube body 1. A screw hole is designed at one end of the positioning pin 4 and a mounting screw 5 is threadedly installed to achieve a firm fixation.

[0032] Furthermore, the mounting screw 5 is screwed into the screw hole on the positioning pin 4 from the outside of the first connecting member 2 or the second connecting member 3. The nut of the mounting screw 5 adopts a hexagonal structure design, and the nut size of the mounting screw 5 is larger than the aperture size of the first positioning hole 111. In this design, the mounting screw 5 is screwed into the screw hole on the positioning pin 4 from the outside of the first connecting member 2 or the second connecting member 3. Its nut adopts a hexagonal structure design. This design not only provides a larger contact area but also facilitates the use of tools for tightening. The nut size of the mounting screw 5 is larger than the aperture size of the first positioning hole 111. This design ensures that the nut will not fall off during tightening, providing additional safety.

[0033] Furthermore, the dimensions of the plug-in tube 21 and the plug-in sleeve 31 match, allowing them to be flexibly inserted. In this design, the plug-in tube 21 is designed at one end of the first connector 2, while the plug-in sleeve 31 is designed at one end of the second connector 3. The two are sized to match each other, allowing the plug-in tube 21 and the plug-in sleeve 31 to be flexibly inserted. This design not only provides a flexible connection method, but also allows for the rapid disassembly and reconnection of adjacent pipes when needed.

[0034] When the present invention is used, ensure that the outer tube 11 and the inner tube 12 have no cracks or other damage, directly insert the inner tube 12 into the outer tube 11, and fix the same end of the outer tube 11 and the inner tube 12 through the first connecting piece 2, fill the outer tube 11 and the inner tube 12 with expanded polypropylene foam on the opposite side to provide insulation and support, and fix the second connecting piece 3 on the other end of the outer tube 11 and the inner tube 12, thereby realizing the assembly of the pipe body 1, and docking the adjacent pipe bodies 1 after assembly through the plug-in tube 21 and the plug-in sleeve 31 on the first connecting piece 2 and the second connecting piece 3, thereby realizing the docking of the pipeline system, and then carry out necessary pressure testing to ensure that the pipe body 1 can withstand the expected pressure in actual use, and once the installation and testing of the pipe body 1 are completed, carry out backfilling operation, cover the pipe body 1 and restore the ground, and ensure that the backfill material meets the engineering requirements to avoid unnecessary pressure or damage to the pipe body 1.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A hollow groutable PVC corrugated pipe, comprising a pipe body (1), wherein a first connecting piece (2) and a second connecting piece (3) are fixedly mounted at both ends of the pipe body (1), characterized in that: The tube body (1) comprises an outer tube (11) and an inner tube (12), wherein the outer tube (11) and the inner tube (12) are not in contact with each other, and the opposite side of the outer tube (11) and the inner tube (12) is filled with foamed polypropylene foam; The first connecting member (2) and the second connecting member (3) are respectively fixedly connected to the outer tube (11) and the inner tube (12) on the same side; the end of the first connecting member (2) facing away from the tube body (1) is provided with a plug-in tube (21); the end of the second connecting member (3) facing away from the tube body (1) is provided with a plug-in sleeve (31).

2. A hollow groutable PVC corrugated pipe according to claim 1, characterized in that: The outer tube (11) is designed with a PVC corrugated tube structure. The lengths of the outer tube (11) and the inner tube (12) match each other. The outer walls at both ends of the outer tube (11) are respectively provided with first positioning holes (111) in a circular array.

3. A hollow groutable PVC corrugated pipe according to claim 1, characterized in that: The inner tube (12) is made of PVC and has a smooth inner wall. The outer wall of the inner tube (12) is provided with reinforcing ribs (121) with a spiral structure design. The reinforcing ribs (121) do not contact the inner wall of the outer tube (11). The outer walls of both ends of the inner tube (12) are respectively provided with second positioning holes (122) in a circular array. The second positioning holes (122) match the opening positions of the first positioning holes (111), and the second positioning holes (122) match the aperture sizes of the first positioning holes (111).

4. A hollow groutable PVC corrugated pipe according to claim 1, characterized in that: The first connecting member (2) and the second connecting member (3) are matched in size. Holes are opened on both the inner and outer sides of the first connecting member (2) and the second connecting member (3) and a positioning pin (4) passes through the hole. The positioning pin (4) passes through the first positioning hole (111) and the second positioning hole (122) at the same time. A screw hole is opened at one end of the positioning pin (4) and a mounting screw (5) is threadedly installed.

5. A hollow groutable PVC corrugated pipe according to claim 4, characterized in that: The mounting screw (5) is screwed into the screw hole on the positioning pin (4) from the outside of the first connecting member (2) or the second connecting member (3); the nut of the mounting screw (5) adopts a hexagonal structure design, and the size of the nut of the mounting screw (5) is larger than the aperture size of the first positioning hole (111).

6. The hollow groutable PVC corrugated pipe according to claim 1, characterized in that: The plug-in tube (21) and the plug-in sleeve (31) have matching sizes, and the plug-in tube (21) and the plug-in sleeve (31) are movably plugged in.

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