A telescopic pipe joint and pipe arrangement

Abstract

The utility model relates to the field of pipeline connection, especially a telescopic pipeline joint and pipeline device. The telescopic joint provided by the utility model realizes the telescopic connection of the first pipeline and the second pipeline through the cooperation of the first connecting end and the second connecting end of the pipeline main body, can effectively compensate the axial displacement of the pipeline due to thermal expansion and cold shrinkage, reduces the pipeline stress, the combination design of the conductive member and the compression nut makes the conductive member radially hold the second pipeline through the axial pressure when the nut is screwed, makes the second pipeline fully contact with the second connecting end through the conductive member, can form reliable grounding passage without external cross-over jumper, guarantees electrical continuity, simplifies the structure, reduces the number of accessories and installation steps, and reduces the cost, the conductive member adopts the conductive material with compression deformation capacity, can adapt to the displacement change when the pipeline stretches and contracts, can keep the conductive contact through continuous holding, and improves the grounding reliability.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection, and in particular to a retractable pipe joint and pipe device. Background Technology

[0002] In electrical piping systems, pipes exposed to environments with significant temperature differences must be equipped with expansion joints due to thermal expansion and contraction to compensate for the displacement caused by thermal expansion and contraction and maintain electrical continuity. However, existing technologies have significant shortcomings. For example, the solution adopted in US Patent Application No. 3154632A uses an internally folded copper braided strip to achieve grounding through inclined compression. However, this structure relies on complex sealing components such as gaskets and fillers, as well as threaded adjustment mechanisms. This not only results in a large number of parts and a cumbersome assembly process, but also has poor applicability in dry environments. Another option, such as the thin-walled sleeve-type expansion joint proposed in US Patent Application No. 6715803B1, although structurally simplified, requires an external bonding jumper to ensure electrical continuity, which undoubtedly increases the need for additional accessories and installation steps.

[0003] Therefore, those skilled in the art urgently need an expansion joint that can achieve grounding without external jumpers, without a sealed structure, and with fewer components. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a retractable pipe joint.

[0005] Includes a pipe body for connecting the separate first and second pipes;

[0006] The pipeline body includes a first connecting end and a second connecting end disposed opposite to each other, and the first connecting end and the second connecting end are connected through an axial channel inside the pipeline body;

[0007] The first connecting end is provided with a fixing part, and the first pipe is inserted into the first connecting end and fixedly connected to the first connecting end through the fixing part; the end of the second connecting end is provided with a thread, and the second pipe is inserted into the second connecting end;

[0008] A conductive component, which is ring-shaped and sleeved on the outer wall of the second pipe, is made of conductive material and has compressive deformation capability;

[0009] The compression nut is threaded to the end of the second connection. When tightened, it pushes the conductive component toward the second connection, causing it to grip the second pipe radially and form a grounding path.

[0010] In one embodiment, the fixing part is a fixing hole, which is provided with mutually cooperating threads and screws, and the end of the screw presses against the outer wall of the first pipe in a radial direction to achieve fixing.

[0011] In one embodiment, the inner diameter of the second connecting end is larger than that of the first connecting end.

[0012] In one embodiment, an annular cavity is formed between the second connection end and the second pipe.

[0013] In one embodiment, an annular metal washer is also included, which is located between the end of the second connection end and the conductive member, such that when the compression nut is tightened and pushes the conductive member to compress in the direction of the second connection end, the annular metal washer abuts against the end of the second connection end.

[0014] In one embodiment, the inner diameter of the annular metal gasket is smaller than the inner diameter of the second connecting end.

[0015] In one embodiment, the first connecting end of the pipe body is rigidly fixed to the first pipe, and the second connecting end allows the second pipe to slide and expand axially.

[0016] In one embodiment, the first connecting end is provided with an annular limiting recess to limit the insertion depth of the first pipe.

[0017] In one embodiment, the conductive member is made of a conductive material and has compressive deformation capability.

[0018] This utility model also provides a pipeline device, including a first pipeline, a second pipeline and a telescopic joint, wherein the first pipeline and the second pipeline are connected by the telescopic joint;

[0019] The retractable joint is the retractable joint described above.

[0020] Compared with existing technologies, the telescopic joint provided by this utility model achieves a telescopic connection between the first and second pipes through the cooperation of the first and second connecting ends of the pipe body. It can effectively compensate for the axial displacement of the pipe caused by thermal expansion and contraction, and reduce pipe stress. The combination design of the conductive component and the compression nut allows the conductive component to radially hug the second pipe through the axial pressure when the nut is tightened. A reliable grounding path can be formed without external jumper wires, ensuring electrical continuity, simplifying the structure, reducing the number of accessories and installation steps, and lowering costs. The conductive component is made of a conductive material with compressive deformation capability, which can adapt to the displacement changes during pipe expansion and contraction, and can maintain conductive contact through continuous hugging, improving grounding reliability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the overall structure of the telescopic joint provided by this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the retractable joint provided by this utility model.

[0024] Figure label:

[0025] 10-Pipe body; 11-First connecting end; 12-Second connecting end; 20-Conductive component; 30-Compression nut; 40-Annular metal gasket; 50-Annular limiting recess; 60-Fixing part; 61-Screw; 62-Fixing hole; 70-First pipe; 80-Second pipe. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "axial," "radial," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] To provide an expansion joint that achieves grounding without external jumpers, without a sealing structure, and using fewer components, this utility model provides such a... Figure 1-2 The expandable pipe joint shown.

[0029] The pipe fitting includes a pipe body 10 for connecting separate first pipe 70 and second pipe 80;

[0030] The pipe body 10 includes a first connecting end 11 and a second connecting end 12 disposed opposite to each other, and the first connecting end 11 and the second connecting end 12 are connected through an axial channel inside the pipe body 10;

[0031] The first connecting end 11 is provided with a fixing part 60, and the first pipe 70 is inserted into the first connecting end 11 and fixedly connected to the first connecting end 11 through the fixing part 60; the end of the second connecting end 12 is provided with a thread, and the second pipe 80 is inserted into the second connecting end 12;

[0032] The conductive component 20 is annularly sleeved on the outer wall of the second pipe 80, and is made of conductive material and has compressive deformation capability.

[0033] The compression nut 30 is threaded to the end of the second connection end 12. When tightened, it pushes the conductive member 20 to compress towards the second connection end 12, so that it hugs the second pipe 80 radially and forms a grounding path.

[0034] Specifically, in use, such as Figure 1-2 As shown, the first pipe 70 is inserted into the through hole of the first connecting end 11 and fixed; the conductive member 20 is sleeved on the outer wall of the second pipe 80, and the second pipe 80 is inserted into the through hole of the second connecting end 12; then the compression nut 30 is tightened, and the axial pressure when the nut is tightened causes the conductive member 20 to radially hug the second pipe 80, so that a reliable grounding path can be formed without external jumper wires, ensuring electrical continuity.

[0035] Furthermore, such as Figure 2 As shown, the fixing part 60 is a fixing hole 62, which is provided with a thread and a screw 61 that cooperate with each other. The end of the screw 61 presses against the outer wall of the first pipe 70 in the radial direction to achieve fixing.

[0036] The above solution uses a threaded fixing hole 62 and a screw 61 to fix the first pipe 70 by radial pressure of the screw 61. The structure is simple, the fixation is reliable, and it is easy to install and disassemble, and it is suitable for pipes of different diameters.

[0037] Furthermore, such as Figure 2 As shown, the inner diameter of the second connecting end 12 is larger than that of the first connecting end 11.

[0038] By adopting the above scheme, the inner diameter of the second connecting end 12 is set to be larger than that of the first connecting end 11, which can provide sufficient space for the axial sliding of the second pipe 80, avoid jamming during expansion and contraction, and improve the flexibility of expansion and contraction.

[0039] Furthermore, such as Figure 2As shown, an annular cavity is formed between the second connecting end 12 and the second pipe 80.

[0040] By adopting the above scheme, an annular cavity is formed between the second connecting end 12 and the second pipe 80, which expands the space and facilitates the insertion of the second pipe 80 into the second connecting end 12, thus facilitating installation.

[0041] Furthermore, such as Figure 2 As shown, it also includes an annular metal gasket 40, which is located between the end of the second connecting end 12 and the conductive member 20, such that when the compression nut 30 is tightened and pushes the conductive member 20 to compress in the direction of the second connecting end 12, the annular metal gasket 40 abuts against the end of the second connecting end 12.

[0042] By adopting the above solution, the annular metal gasket 40 limits the movement of the conductive component 20, preventing it from entering the annular cavity between the second connection end 12 and the second pipe 80 when the compression nut 30 is tightened.

[0043] Furthermore, the inner diameter of the annular metal gasket 40 is smaller than the inner diameter of the second connecting end 12.

[0044] Furthermore, the first connecting end 11 of the pipe body 10 is rigidly fixed to the first pipe 70, and the second connecting end 12 allows the second pipe 80 to slide and expand axially.

[0045] By adopting the above scheme, when the first connecting end 11 is rigidly fixed to the first pipe 70 and the second connecting end 12 allows the second pipe 80 to slide, the functional division of the two ends is clearly defined. This ensures the stability of the connection at one end and compensates for displacement through the expansion and contraction of the other end, thus taking into account both reliability and adaptability.

[0046] Furthermore, such as Figure 1 or Figure 2 As shown, the first connecting end 11 is provided with an annular limiting recess 50, which is used to limit the insertion depth of the first pipe 70.

[0047] Using the above scheme, the first connecting end 11 is provided with an annular limiting recess 50, which can accurately limit the insertion depth of the first pipe 70 and facilitate quick positioning during installation.

[0048] Furthermore, the conductive member 20 is made of a conductive material and has compressive deformation capability.

[0049] Preferably, the conductive component 20 is a metal braided strip, and its material is one of pure copper, copper alloy, tin-plated copper, aluminum alloy and stainless steel.

[0050] Using the above scheme, the conductive component 20 is made of metal braided strips such as pure copper or copper alloys. By utilizing the high elasticity and excellent conductivity of the braided structure, it can meet the requirements of compression deformation, reduce contact resistance, and improve conductivity.

[0051] It should be noted that the conductive component 20 is made of a material with good conductivity, including but not limited to the solution provided in this embodiment.

[0052] Preferably, the conductive component 20 is made of a flexible conductive material.

[0053] This utility model also provides a pipeline device, such as Figure 2 As shown, it includes a first pipe 70, a second pipe 80, and a telescopic joint, wherein the first pipe 70 and the second pipe 80 are connected by the telescopic joint;

[0054] The retractable joint is the retractable joint described above.

[0055] By employing the aforementioned expandable pipe joint, this piping device can achieve reliable connection and axial expansion and contraction between the first pipe 70 and the second pipe 80, compensating for thermal expansion and contraction displacement. It can also ensure the electrical continuity of the system through the built-in conductive component 20, eliminating the need for additional jumpers. The structure is simplified, installation is convenient, and operation is stable, making it suitable for various application scenarios such as dry environments or low-cost requirements.

[0056] Although this document frequently uses terms such as first pipe, second pipe, and expandable joint, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A retractable pipe joint, characterized in that, include: Pipe body (10) for connecting the separate first pipe (70) and second pipe (80); The pipe body (10) includes a first connecting end (11) and a second connecting end (12) disposed opposite to each other, and the first connecting end (11) and the second connecting end (12) are connected through an axial channel inside the pipe body (10); The first connecting end (11) is provided with a fixing part (60), the first pipe (70) is inserted into the first connecting end (11) and fixedly connected to the first connecting end (11) through the fixing part (60); the end of the second connecting end (12) is provided with a thread, and the second pipe (80) is inserted into the second connecting end (12). The conductive component (20) is annularly sleeved on the outer wall of the second pipe (80); The compression nut (30) is threaded to the end of the second connection end (12). When tightened, it pushes the conductive member (20) to compress towards the second connection end (12), so that it hugs the second pipe (80) radially and forms a grounding path.

2. The expandable pipe joint according to claim 1, characterized in that: The fixing part (60) is a fixing hole (62), which is provided with a thread and a screw (61) that cooperate with each other. The end of the screw (61) presses against the outer wall of the first pipe (70) in the radial direction to achieve fixing.

3. The expandable pipe joint according to claim 1, characterized in that: The inner diameter of the second connecting end (12) is larger than that of the first connecting end (11).

4. The expandable pipe joint according to claim 3, characterized in that: An annular cavity is formed between the second connecting end (12) and the second pipe (80).

5. The expandable pipe joint according to claim 4, characterized in that: It also includes an annular metal gasket (40), which is located between the end of the second connection end (12) and the conductive member (20), such that when the compression nut (30) is tightened, it pushes the conductive member (20) to compress in the direction of the second connection end (12), and the annular metal gasket (40) abuts against the end of the second connection end (12).

6. The expandable pipe joint according to claim 5, characterized in that: The inner diameter of the annular metal gasket (40) is smaller than the inner diameter of the second connecting end (12).

7. The expandable pipe joint according to claim 1, characterized in that: The first connecting end (11) of the main body of the pipe (10) is rigidly fixed to the first pipe (70), and the second connecting end (12) allows the second pipe (80) to slide and expand axially.

8. The expandable pipe joint according to claim 1, characterized in that: The first connecting end (11) is provided with an annular limiting recess (50) to limit the insertion depth of the first pipe (70).

9. The expandable pipe joint according to claim 1, characterized in that: The conductive component (20) is made of conductive material and has compressive deformation capability.

10. A pipeline device, characterized in that, include: A first pipe (70), a second pipe (80), and a retractable joint, wherein the first pipe (70) and the second pipe (80) are connected by the retractable joint; The retractable joint is the retractable joint as described in any one of claims 1-9.

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