A double-layer PE pipe anti-slip connection structure

Abstract

This application proposes a double-layer PE pipe anti-slip connection structure, including a connecting pipe body and a protruding pipe body sleeved on the outside of the connecting pipe body, for connecting two double-layer PE pipes or connecting one double-layer PE pipe and a single-layer pipe. In use, the inner layer of the double-layer PE pipe is connected to the connecting pipe body, and the outer layer or single-layer pipe is connected to the protruding pipe body, thereby avoiding collision or slippage between the inner layer and the outer layer.

Description

Technical Field

[0001] This application relates to the field of PE pipe connection technology, specifically to a double-layer PE pipe anti-slip connection structure. Background Technology

[0002] PE pipe, also known as polyethylene pipe, is a highly crystalline, non-polar thermoplastic resin, currently widely used in water supply and drainage and gas transportation. In water supply and drainage or oil and gas transportation, double-layered pipes are typically used to reduce the risk of leakage, especially for pipelines transporting corrosive liquids. Double-layered pipes are also used in special environments or under specific requirements, such as submarine pipelines, where repair or replacement is impossible or extremely costly after installation. If the inner pipe leaks, the outer pipe acts as a containment layer, collecting any leaked liquid or gas and preventing it from directly entering the environment.

[0003] In the use of double-layer piping, if the inner layer leaks, the liquid or gas it is transporting can flow out along the gap between the inner and outer layers, preventing direct pollution. Therefore, the two layers of piping cannot be blocked with fillers, but it is also necessary to ensure that the two layers do not collide and that the inner layer does not experience significant vibration or slippage, which could damage the piping. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a double-layer PE pipe anti-slip connection structure, the connection structure being used to connect two double-layer PE pipes, or connecting a double-layer PE pipe at one end and a single-layer pipe at the other end, wherein the double-layer PE pipe includes an inner layer pipe and an outer layer pipe, and there is a flow gap between the inner layer pipe and the outer layer pipe, the connection structure comprising:

[0005] A connecting tube body, wherein the direction of the extended axis of the connecting tube body is a first direction, and at least one end along the first direction is connected to the inner tube;

[0006] A raised tube body is sleeved outside the connecting tube body, and at least one end along the first direction is connected to the outer tube.

[0007] According to the technical solution provided in the embodiments of this application, the protruding tube body is provided with a plurality of flow holes, and at least one end of the flow hole along the first direction is connected to the flow gap.

[0008] According to the technical solution provided in the embodiments of this application, it further includes two first connecting sleeves distributed along the first direction and sleeved on the body of the protruding tube. The two ends of the protruding tube are respectively connected to the outer tube through the first connecting sleeves, and the two ends of the connecting tube are respectively connected to the inner tube. Alternatively, one end of the protruding tube is connected to the outer tube through the first connecting sleeve, and the other end is connected to the single-layer tube through the first connecting sleeve. One end of the connecting tube is connected to the inner tube, and the other end is suspended.

[0009] According to the technical solution provided in the embodiments of this application, each of the first connecting sleeves has a molten zone at the connection end with the outer tube or the single tube, and a molten zone at the connection end with the protruding tube body.

[0010] According to the technical solution provided in the embodiments of this application, a second connecting sleeve is further provided outside the protruding tube body. One end of the protruding tube body is connected to the outer tube through the second connecting sleeve, and one end of the connecting tube body is connected to the inner tube, and the other end is connected to the single tube.

[0011] According to the technical solution provided in the embodiments of this application, the second connecting sleeve has a molten zone at the connection end with the outer tube and a molten zone at the connection end with the protruding tube body.

[0012] According to the technical solution provided in the embodiments of this application, the plurality of flow holes are arranged in an array, and the direction of their axial extension line is the first direction.

[0013] According to the technical solution provided in the embodiments of this application, the connecting tube and the protruding tube are integrally formed.

[0014] According to the technical solution provided in the embodiments of this application, the connecting tube body is fused with the inner tube.

[0015] In summary, this application proposes a double-layer PE pipe anti-slip connection structure, including a connecting pipe body and a protruding pipe body sleeved on the outside of the connecting pipe body, for connecting two double-layer PE pipes or connecting one double-layer PE pipe and a single-layer pipe. In use, the inner layer of the double-layer PE pipe is connected to the connecting pipe body, and the outer layer or single-layer pipe is connected to the protruding pipe body, thereby avoiding collision or slippage between the inner layer and the outer layer. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view provided in an embodiment of the present application, where both ends are connected to double-layer PE pipes;

[0017] Figure 2 A cross-sectional view provided for an embodiment of this application, showing one end connected to a double-layer PE pipe and the other end of a protruding pipe body connected to a single-layer pipe;

[0018] Figure 3 A cross-sectional view provided for an embodiment of this application, showing a connecting pipe body with one end connected to a double-layer PE pipe and the other end connected to a single-layer pipe;

[0019] Figure 4 for Figure 1 Schematic diagram of the structure of AA;

[0020] Figure 5 A schematic diagram of the connection structure of the portion of the protruding tube body without a flow hole provided in the embodiment of this application;

[0021] Figure 6 This is a schematic diagram of a partial connection structure with a flow passage hole on a protruding tube body provided in an embodiment of this application.

[0022] The text labels in the image represent:

[0023] 1. Connecting pipe body; 2. Protruding pipe body; 3. Flow through hole; 41. First connecting sleeve; 42. Second connecting sleeve; 5. Double-layer PE pipe; 51. Outer pipe; 52. Inner pipe; 6. Single-layer pipe; 7. Valve well; 8. Flow gap. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] As mentioned in the background section, this application proposes an anti-slip connection structure for a double-layer PE pipe 5. This connection structure is used to connect two double-layer PE pipes 5, or to connect one end of a double-layer PE pipe 5 and the other end of a single-layer pipe 6. The double-layer PE pipe 5 includes an inner pipe and an outer pipe 51, with a flow gap 8 between the inner pipe and the outer pipe 51. The connection structure includes:

[0027] Connecting tube 1, wherein the direction of the extended axis of the connecting tube 1 is a first direction, and at least one end along the first direction is connected to the inner tube;

[0028] The protruding tube 2 is sleeved outside the connecting tube 1, and at least one end along the first direction is connected to the outer tube 51.

[0029] Specifically, the first direction is the extension direction of the connecting pipe 1, such as... Figure 1 As shown, the direction is left to right; the length of the protruding tube 2 is less than that of the connecting tube 1, and it is located in the middle of the connecting tube 1. The inner tube and outer tube 51 of the double-layer tube body are fixed by the connecting structure, which avoids collision or slippage vibration between the inner tube and the outer tube 51, and reduces damage to the double-layer PE tube 5.

[0030] In a preferred embodiment, the system further includes two first connecting sleeves 41 distributed along the first direction and sleeved outside the protruding tube 2. Both ends of the protruding tube 2 are connected to the outer tube 51 through the first connecting sleeves 41, and both ends of the connecting tube 1 are connected to the inner tube. Alternatively, one end of the protruding tube 2 is connected to the outer tube 51 through the first connecting sleeves 41, and the other end is connected to the single-layer tube 6 through the first connecting sleeves 41. One end of the connecting tube 1 is connected to the inner tube, and the other end is suspended.

[0031] In a specific scenario, both ends of the connecting structure are connected to the double-layer PE pipe 5. In order to ensure that the inner and outer layers of the two double-layer PE pipes 5 will not shift or collide, both ends of the connecting pipe body 1 are connected to the two inner layers, and both ends of the protruding pipe body 2 are connected to the outer layer 51 through the first connecting sleeve 41.

[0032] In a specific scenario, one end of the connecting structure is connected to a double-layer PE pipe 5, and the other end is connected to a single-layer pipe 6. The outer diameter of the single-layer pipe 6 is the same as the outer diameter of the raised pipe body 2. For example, in a pipeline, multiple double-layer PE pipes 5 connected by the connecting structure are included in the middle. To save costs, the double-layer PE pipes 5 are replaced with single-layer pipes 6 at the end of the pipeline. One end of the raised pipe body 2 is connected to the outer pipe 51 through a first connecting sleeve 41, and the other end is connected to the single-layer pipe 6 through another first connecting sleeve 41. One end of the connecting pipe body 1 is connected to the inner pipe, and the other end is suspended. In both of these specific scenarios, two sleeves are used to complete the connection between the raised pipe body 2 and the double-layer PE pipe 5 or the single-layer pipe 6.

[0033] In a preferred embodiment, each of the first connecting sleeves 41 has a molten zone at the connection end with the outer tube 51 or the single tube 6, and a molten zone at the connection end with the protruding tube body 2.

[0034] Specifically, when the connection structure includes two first connecting sleeves 41, the connection structure has a total melting zone. A resistance wire is provided in the melting zone. When the resistance wire is energized, it generates Joule heat, causing the corresponding parts of the first connecting sleeve 41 and the protruding tube 2, the outer tube 51 or the single-layer tube 6 to partially melt, thereby achieving a firm connection between the first connecting sleeve 41 and the single-layer tube 6 or the outer tube 51 and the protruding tube 2.

[0035] In a preferred embodiment, a second connecting sleeve 42 is further provided outside the protruding tube body 2. One end of the protruding tube body 2 is connected to the outer tube 51 through the second connecting sleeve 42, and one end of the connecting tube body 1 is connected to the inner tube, and the other end is connected to the single-layer tube 6.

[0036] In a specific scenario, one end of the connecting structure is connected to a double-layer PE pipe 5, and the other end is connected to a single-layer pipe 6. Unlike the previous cases, the outer diameter of the single-layer pipe 6 is the same as the outer diameter of the connecting pipe body 1, and the two are connected via the connecting pipe body 1. For example, one end of the connecting pipe body 1 is placed outside the valve well 7 and connected to the double-layer PE pipe 5, while the other end extends into the valve well 7 and connects to the single-layer pipe 6. In this scenario, one end of the protruding pipe body 2 is connected to the outer pipe 51, while the other end is not connected; therefore, the connecting structure only includes a connecting sleeve.

[0037] In a preferred embodiment, the second connecting sleeve 42 has a molten zone at the connection end with the outer tube 51 and a molten zone at the connection end with the protruding tube body 2.

[0038] Specifically, the melting zone is as described above, and will not be repeated here.

[0039] In a preferred embodiment, the protruding tube 2 is provided with a plurality of flow holes 3, at least one end of each flow hole 3 along the first direction communicating with the flow gap 8. The plurality of flow holes 3 are arranged in an array, and the direction of their extended axes is the first direction.

[0040] Specifically, whether or not the raised tube body 2 is provided with a flow passage 3 depends on the application scenario. For example, when one end of the connecting tube body 1 of the connecting structure extends into the valve well 7 and connects to the single-layer tube 6, no flow passage is provided on the raised tube body 2 to prevent fluid leakage. In the scenario where multiple flow passages 3 are uniformly provided circumferentially on the tube wall of the raised tube body 2, when the connecting structure connects two double-layer PE tubes 5, the two ends of the flow passage 3 are connected to the two flow gaps 8. When a leak occurs on the inner tube, the fluid in the inner tube enters the flow gap 8 through the leak and then flows out from one end of the flow gap 8 along the direction of fluid flow through the flow passage 3. When one end of the connecting structure is connected to the double-layer PE tube 5 and connected to the single-layer tube 6 through the first connecting sleeve 41, the fluid in the inner tube 52 flows into the flow gap 8 through the leak and flows out from the single-layer tube 6 along the direction of fluid flow through the flow passage 3.

[0041] Optionally, the specifications of the double-layer PE pipe 5 are as follows: the inner layer pipe is 52dn400 SDR11 and the outer layer pipe 51 is dn500 SDR17. Based on these specifications, the wall thickness of the inner layer pipe is approximately 36.4mm and the wall thickness of the outer layer pipe 51 is approximately 29.4mm.

[0042] In a preferred embodiment, the wall thickness of the connecting tube 1 is the same as the wall thickness of the inner tube or the single-layer tube 6 connected to the connecting tube 1, and the outer diameter of the outer tube 51 or the single-layer tube 6 connected to the protruding tube 2 is the same as the outer diameter of the protruding tube 2.

[0043] Specifically, the inner diameter and wall thickness of the connecting tube 1 and the inner tube are the same, which ensures both the fluid flow rate in the inner tube and the contact area for welding, thus providing welding strength. Since the outer diameter of the outer tube 51 is the same as the outer diameter of the protruding tube 2, the wall thickness of the protruding tube 2 is greater than the wall thickness of the outer tube 51.

[0044] In a preferred embodiment, the connecting tube 1 and the protruding tube 2 are integrally formed.

[0045] Specifically, as described above, the connecting tube 1 and the protruding tube 2 have relatively thick walls. They are manufactured using a machining process, with rectangular blocks obtained through extrusion. The connecting tube 1 and the protruding tube 2 are then milled out using a machine tool. This process avoids the problem of pressure reduction during welding.

[0046] In a preferred embodiment, the connecting tube 1 is fused to the inner tube.

[0047] Optionally, welding can be achieved using a welding machine; when one end of the connecting pipe body 1 is connected to the single-layer pipe 6 in the valve well 7, welding can be achieved using a welding machine or by connecting via a flange.

[0048] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A double-layer PE pipe anti-slip connection structure, wherein the connection structure is used to connect two double-layer PE pipes (5), or to connect one end to a double-layer PE pipe (5) and the other end to a single-layer pipe (6), wherein, The double-layer PE pipe (5) includes an inner layer pipe (52) and an outer layer pipe (51), with a flow gap (8) between the inner layer pipe (52) and the outer layer pipe (51). The connection structure includes: Connecting tube (1), the direction of the extension of the axis of the connecting tube (1) is the first direction, and at least one end along the first direction is connected to the inner tube (52); The protruding tube (2) is sleeved outside the connecting tube (1) and at least one end along the first direction is connected to the outer tube (51).

2. The double-layer PE pipe anti-slippage connection structure according to claim 1, characterized in that, It also includes two first connecting sleeves (41) distributed along the first direction and sleeved outside the protruding tube body (2). The two ends of the protruding tube body (2) are respectively connected to the outer tube (51) through the first connecting sleeves (41), and the two ends of the connecting tube body (1) are respectively connected to the inner tube (52). Alternatively, one end of the protruding tube body (2) is connected to the outer tube (51) through the first connecting sleeves (41), and the other end is connected to the single tube (6) through the first connecting sleeves (41). One end of the connecting tube body (1) is connected to the inner tube (52), and the other end is suspended.

3. The double-layer PE pipe anti-slippage connection structure according to claim 2, characterized in that, Each of the first connecting sleeves (41) has a molten zone at the connection end with the outer tube (51) or the single tube (6), and a molten zone at the connection end with the protruding tube body (2).

4. The double-layer PE pipe anti-slippage connection structure according to claim 1, characterized in that, It also includes a second connecting sleeve (42) sleeved outside the protruding tube body (2). One end of the protruding tube body (2) is connected to the outer tube (51) through the second connecting sleeve (42), and one end of the connecting tube body (1) is connected to the inner tube (52), and the other end is connected to the single tube (6).

5. The double-layer PE pipe anti-slippage connection structure according to claim 4, characterized in that, The second connecting sleeve (42) has a molten zone at the connection end with the outer tube (51) and a molten zone at the connection end with the protruding tube body (2).

6. The double-layer PE pipe anti-slippage connection structure according to any one of claims 2 or 4, characterized in that, The protruding tube body (2) is provided with a plurality of flow holes (3), and at least one end of the flow hole (3) along the first direction is connected to the flow gap (8).

7. The double-layer PE pipe anti-slippage connection structure according to claim 6, characterized in that, The multiple flow holes (3) are arranged in an array, and the direction of their extended axis is the first direction.

8. The dual layer PE pipe anti-slip connection structure according to claim 1, characterized in that, The connecting tube (1) and the protruding tube (2) are integrally formed.

9. The dual layer PE pipe anti-slip connection structure according to claim 1, characterized in that, The connecting tube (1) is fused to the inner tube (52).

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