A composite pipe, stainless steel lining and pipe sealing detection device

Abstract

The application relates to the technical field of composite pipes for urban construction, in particular to a composite pipe, a pipe stainless steel lining and a pipe sealing detection device, which comprises a composite pipe body and a protective coating coated on the outer surface, the composite pipe body is composed of a first sleeve pipe and a second sleeve pipe, a lining body, the inner wall surface of the lining body is coated with a lining coating, a first assembly groove is arranged on the outer wall surface of the lining body, a vacuum film sleeve is installed in the first assembly groove, a vacuum degree measuring instrument for measuring the vacuum film sleeve, the vacuum degree measuring instrument is installed on the outer wall of the composite pipe body, one side of the pressing rod is provided with a sealing plate, and matching sliding blocks are fixed to the upper and lower ends of the sealing plate. The vacuum film sleeve can conveniently detect whether cracks occur in the pipe, meanwhile, the vacuum film sleeve can make the pipe itself have the effects of heat insulation, sound insulation, odor isolation and the like, so that the practical effect of the pipe is improved.

Description

Technical Field

[0001] This invention relates to the field of composite pipe technology for urban construction, specifically to a composite pipe, a stainless steel lining for the pipe, and a pipe sealing detection device. Background Technology

[0002] Composite pipes are pipes made of two or more materials (including multi-layered pipes).

[0003] The invention discloses a high-sealing stainless steel lined connecting pipe fitting and its manufacturing process, with announcement number CN111022792B. The high-sealing stainless steel lined connecting pipe fitting includes a connecting pipe fitting and a pipe to be connected. The outer end of the connecting pipe fitting is provided with a connecting component A, which includes a connecting pipe body and a transition pipe body adapted to be inserted into the connecting pipe body. The outer end of the pipe to be connected is provided with a connecting component B adapted to and connected to the connecting component A. The connecting component B includes the pipe body to be connected and a connecting ring pipe fixed outside the pipe body to be connected. This invention, by providing a transition pipe body, forms multiple sealing paths compared to the existing direct connection between the connecting component and the pipe, resulting in stronger overall sealing. Furthermore, the transition layer of polymer material further improves the interference fit sealing. The pipe sealing performance is significantly improved compared to existing technologies, and the effective service life is extended by more than three times.

[0004] The search also yielded a stainless steel-lined fiber-reinforced plastic composite pipe with announcement number CN212900184U. This pipe comprises a plastic pipe and a stainless steel pipe. A stainless steel connecting flange is welded to the end of the stainless steel pipe. A necked flange is fitted onto the outer side of the plastic pipe near the connecting flange. A pair of semi-circular sealing elements are provided on the outer side of the necked flange. Each sealing element includes a semi-circular annular support plate and a sealing layer. The combination of the necked flange and the sealing elements effectively prevents the stainless steel-lined pipe from being corroded by external factors. Furthermore, the necked flange is movable, and the sealing elements are detachable, increasing the flexibility of the composite pipe's use.

[0005] In summary, the following technical problems exist in the existing technology: existing pipelines mostly achieve heat insulation and sound insulation through spray coating technology. However, this method makes it inconvenient to detect the pipeline seal during use. As a result, small cracks that appear during pipeline use cannot be detected in time during inspection and maintenance. Therefore, we propose a composite pipeline, a stainless steel pipeline lining, and a pipeline seal detection device. Summary of the Invention

[0006] The purpose of this invention is to provide a composite pipe, a stainless steel lining for the pipe, and a pipe sealing detection device. This invention solves the problem that existing pipes, which are mostly treated with spray coating technology for heat insulation and sound insulation, are inconvenient to detect the sealing of the pipe during use. As a result, small cracks that appear during pipe use cannot be detected in time during inspection and maintenance.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a composite pipe, a stainless steel lining for the pipe, and a pipe sealing detection device, comprising a composite pipe body and a protective coating applied to the outer surface. The composite pipe body is composed of a first sleeve and a second sleeve. An assembly head and an assembly insertion hole are provided at the connection between the first sleeve and the second sleeve. The assembly head is fixed on the second sleeve, and the assembly insertion hole is opened on the first sleeve. Both the first sleeve and the second sleeve are provided with assembly insertion holes, and assembly pins are assembled in the assembly insertion holes. A second assembly groove is provided on the inner wall of the first sleeve and the second sleeve.

[0008] Preferably, the first sleeve is engaged with the second sleeve through an assembly head and an assembly socket, and the connection between the first sleeve and the second sleeve is tightly fitted.

[0009] Preferably, both ends of the composite pipe body are provided with assembly connectors, and sealing gaskets are attached to the assembly connectors.

[0010] The present invention also provides a stainless steel liner for a pipe, comprising the aforementioned composite pipe; a liner body, the inner wall surface of which is coated with a liner coating, a sealing assembly groove being provided at the top of the outer wall surface of the liner body, a sealing ring and an adhesive membrane sleeve being assembled in the sealing assembly groove, the sealing ring being located inside the adhesive membrane sleeve, a first assembly groove being provided on the outer wall surface of the liner body, a vacuum membrane sleeve being installed in the first assembly groove, an assembly hole being provided on the vacuum membrane sleeve, and an assembly connecting pin being provided in the assembly hole, the end of which is fixed to the liner body.

[0011] Preferably, both the first and second assembly slots are coated with strong adhesive, and the first and second assembly slots are bonded to the vacuum membrane sleeve by adhesive bonding.

[0012] Preferably, the outer wall of the top end of the inner lining body is tightly fitted to the inner wall of the composite pipe body through a sealing ring, and the outer wall of the top end of the inner lining body is sealed and bonded to the inner wall of the composite pipe body through an adhesive film sleeve.

[0013] Preferably, the inner lining body is snapped into the composite pipe body via an assembly connecting pin seat and an assembly insertion hole, and the composite pipe body is fixedly connected to the inner lining body via an assembly pin, an assembly connecting pin seat, and an assembly insertion hole.

[0014] The present invention also provides a pipe sealing detection device, including the aforementioned stainless steel pipe liner; a vacuum degree measuring instrument for measuring a vacuum diaphragm sleeve, the vacuum degree measuring instrument being installed on the outer wall of the composite pipe body, the input end of the vacuum degree measuring instrument being connected to a connecting probe, the other end of the connecting probe being connected to a connector, a sealing connecting nut and a gasket being provided between the connector and the connecting probe, the bottom end of the connector being connected to a connector, the connector having a communicating channel and a control groove, one end of the connector having a pressing rod, one side of the pressing rod having a sealing plate, and both the upper and lower ends of the sealing plate having matching sliders fixed thereon, the outer side of the matching sliders having a matching track, the sealing plate having a matching slot hole, and the end of the sealing plate facing away from the pressing rod having an elastic component installed.

[0015] Preferably, the vacuum measuring instrument is interconnected with the vacuum diaphragm via a connecting probe, connector, connecting channel, matching slot, and the connecting channel and matching slot are mutually matched.

[0016] Preferably, the sealing plate elastically extends and retracts in the control groove via a pressing rod and an elastic component, the matching slider and the matching track are matched in size, and the sealing plate slides in the control groove via the matching slider and the matching track.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The composite pipe body provided by this invention can be assembled and used on-site through the first sleeve and the second sleeve, thereby improving the convenience of the composite pipe during assembly and use. Furthermore, the snap-fit ​​assembly of the assembly head and assembly socket facilitates the disassembly of the composite pipe body during inspection and maintenance, making it easier to locate the problem at a specific location inside the pipe.

[0018] The inner lining body and the composite pipe body are designed to work together. The assembly connection pins and assembly insertion holes are equally distributed on the inner lining body and the composite pipe body. The assembly pins are installed in the assembly connection pins and assembly insertion holes. This ensures the tightness of the connection between the inner lining body and the composite pipe body, avoids the problem of the inner lining body tilting and rolling, and achieves the effect of positioning and bearing.

[0019] This invention uses strong adhesive to bond a vacuum membrane sleeve in the first and second assembly grooves, allowing the vacuum membrane sleeve to adhere to the inner lining body and the composite pipe body. At the same time, the vacuum membrane sleeve can facilitate the detection of cracks inside the pipe. In addition, the vacuum membrane sleeve can also provide the pipe with heat insulation, sound insulation, and odor isolation effects, thereby improving the practical effect of the pipe.

[0020] The vacuum measuring instrument of this invention is connected to the vacuum membrane sleeve via a probe, connector, connecting channel, and matching slot. This allows for convenient measurement of the vacuum level inside the vacuum membrane sleeve. By observing changes in the vacuum level, it is easy to determine whether there is a crack between the inner lining body and the composite tube body. This facilitates timely understanding of the operational status of the inner lining body and the composite tube body during maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the composite pipeline structure of the present invention; Figure 2 This is a schematic diagram of the unfolded structure of the composite pipeline of the present invention; Figure 3 This is a schematic diagram of the stainless steel liner structure of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at point A in the middle; Figure 5 This is a partial structural diagram of the vacuum membrane assembly of the present invention; Figure 6 This is a schematic diagram of the internal structure of the connector of the present invention; Figure 7 This is a schematic diagram of the side connection structure of the sealing plate of the present invention.

[0022] In the diagram: 1. Inner liner body; 2. Sealing ring; 3. Adhesive membrane sleeve; 4. Sealing assembly groove; 5. Inner liner coating; 6. First assembly groove; 7. Vacuum membrane sleeve; 8. Assembly hole; 9. Assembly connecting pin seat; 10. Composite pipe body; 1001. First sleeve; 1002. Second sleeve; 11. Vacuum degree measuring instrument; 12. Connecting probe; 13. Connector; 14. Assembly head; 15. Assembly insertion hole; 16. Assembly insertion hole; 17. Second assembly groove; 18. Assembly pin; 19. Connector; 20. Pressing rod; 21. Connecting channel; 22. Control groove; 23. Sealing plate; 24. Matching slot hole; 25. Elastic component; 26. Sealing connecting nut; 27. Matching slider; 28. Matching track; 29. ​​Protective coating; 30. Assembly connecting head. Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] As attached Figure 1 , Figure 2 and Figure 5 As shown, the present invention provides a technical solution: a composite pipe, comprising a composite pipe body 10 and a protective coating 29 coated on the outer surface. The composite pipe body 10 is composed of a first sleeve 1001 and a second sleeve 1002. An assembly head 14 and an assembly insertion hole 15 are provided at the connection between the first sleeve 1001 and the second sleeve 1002. The assembly head 14 is fixed on the second sleeve 1002, and the assembly insertion hole 15 is formed on the first sleeve 1001. The first sleeve 1001 is engaged with the second sleeve 1002 through the assembly head 14 and the assembly insertion hole 15, and the connection between the first sleeve 1001 and the second sleeve 1002 is tightly fitted. The composite pipe body 10 can be assembled on-site through the first sleeve 1001 and the second sleeve 1002. The composite pipe is designed for easy assembly and use, which improves the convenience of assembly and use. The assembly head 14 and assembly socket 15 facilitate the disassembly of the composite pipe body 10 during maintenance, making it easier to locate problems inside the pipe. Both the first sleeve 1001 and the second sleeve 1002 are provided with assembly socket holes 16, and assembly pins 18 are installed in the assembly socket holes 16. The inner walls of the first sleeve 1001 and the second sleeve 1002 are provided with second assembly grooves 17. Both ends of the composite pipe body 10 are provided with assembly connectors 30, and sealing gaskets are attached to the assembly connectors 30. The composite pipe bodies 10 are connected through the assembly connectors 30 and sealing gaskets, which facilitates the transportation of urban water.

[0026] As attached Figure 3 and Figure 4As shown, the present invention provides a technical solution: a stainless steel liner for a pipe, comprising the aforementioned composite pipe; a liner body 1, the inner wall of which is coated with a liner coating 5; a sealing assembly groove 4 formed at the top of the outer wall of the liner body 1; a sealing ring 2 and an adhesive film sleeve 3 assembled in the sealing assembly groove 4; the sealing ring 2 being located inside the adhesive film sleeve 3; the outer wall of the top of the liner body 1 being tightly fitted to the inner wall of the composite pipe body 10 through the sealing ring 2; and a tight seal being formed between the outer wall of the top of the liner body 1 and the inner wall of the composite pipe body 10 through the adhesive film sleeve 3. The inner liner body 1 and the composite tube body 10 are connected by an adhesive seal. The adhesive film sleeve 3 can be squeezed through to ensure a tight fit between the top of the inner liner body 1 and the inner wall of the composite tube body 10, guaranteeing a tight seal between the two. The outer wall of the inner liner body 1 has a first assembly groove 6, in which a vacuum film sleeve 7 is installed. Both the first assembly groove 6 and the second assembly groove 17 are coated with strong adhesive. The first assembly groove 6, the second assembly groove 17, and the vacuum film sleeve 7 are connected by adhesive. The strong adhesive is used to bond the first assembly groove 6 and the second assembly groove 17. The vacuum membrane sleeve 7 allows it to adhere to both the inner liner body 1 and the composite pipe body 10. Simultaneously, the vacuum membrane sleeve 7 facilitates the inspection of internal pipe cracks. Furthermore, the vacuum membrane sleeve 7 provides insulation, soundproofing, and odor control for the pipe itself, thereby improving its practicality. The vacuum membrane sleeve 7 has an assembly hole 8, within which is a mounting pin seat 9. The end of the mounting pin seat 9 is fixed to the inner liner body 1. The inner liner body 1 is connected to the composite pipe body 10 via the mounting pin seat 9 and the assembly insertion hole 16. The main body 10 is snapped in place, and the composite pipe main body 10 is fixedly connected to the inner lining main body 1 through the assembly pin 18, the assembly connecting pin seat 9, and the assembly insertion hole 16. The inner lining main body 1 and the composite pipe main body 10 are designed to cooperate with each other. The assembly connecting pin seat 9 and the assembly insertion hole 16 are equally distributed on the inner lining main body 1 and the composite pipe main body 10, respectively. The assembly pin 18 is installed in the assembly connecting pin seat 9 and the assembly insertion hole 16. This ensures the tightness of the connection between the inner lining main body 1 and the composite pipe main body 10, avoids the problem of the inner lining main body 1 tilting and rolling, and plays a role in positioning and bearing.

[0027] As attached Figure 1 , Figure 5 , Figure 6 and Figure 7As shown, the present invention provides a technical solution: a pipe sealing detection device, including the aforementioned stainless steel pipe liner; a vacuum degree measuring instrument 11 for measuring a vacuum diaphragm sleeve 7, the vacuum degree measuring instrument 11 being installed on the outer wall of the composite pipe body 10, the input end of the vacuum degree measuring instrument 11 being connected to a connecting probe 12, the other end of the connecting probe 12 being connected to a connector 13, a sealing connecting nut 26 and a gasket being provided between the connector 13 and the connecting probe 12, a connector 19 being connected to the bottom end of the connector 13, the connector 19 having a communicating channel 21 and a control groove 22, a pressing rod 20 being provided at one end of the connector 19, a sealing plate 23 being provided on one side of the pressing rod 20, and matching sliders 27 being fixed at both the upper and lower ends of the sealing plate 23, a matching track 28 being provided on the outer side of the matching sliders 27, and a matching slot 24 being opened on the sealing plate 23, the vacuum degree measuring instrument 11 being connected to the connecting probe 12, connector 13, and... The connecting channel 21, the matching slot 24, and the vacuum membrane sleeve 7 are interconnected, and the connecting channel 21 and the matching slot 24 are matched accordingly. The vacuum degree measuring instrument 11 is connected to the vacuum membrane sleeve 7 through the connecting probe 12, the connector 13, the connecting channel 21, and the matching slot 24. This allows for convenient measurement of the vacuum degree inside the vacuum membrane sleeve 7. By observing the changes in vacuum degree, it is easy to know whether there is a crack between the inner liner body 1 and the composite tube body 10. This allows for timely understanding of the working condition of the inner liner body 1 and the composite tube body 10 during maintenance. An elastic component 25 is installed on the end of the sealing plate 23 away from the pressing rod 20. The sealing plate 23 elastically expands and contracts in the control groove 22 through the pressing rod 20 and the elastic component 25. The matching slider 27 and the matching track 28 are matched in size. The sealing plate 23 slides in the control groove 22 through the matching slider 27 and the matching track 28. This ensures the sealing of the connection while sliding.

[0028] In summary: This invention addresses the technical problem that existing pipelines mostly achieve heat insulation and sound insulation through spray coating technology. However, this method makes it inconvenient to inspect the pipeline's seal during use, resulting in small cracks that cannot be detected in a timely manner during maintenance. The invention employs the technical solutions described in the above embodiments. Furthermore, the implementation process of the above technical solutions is as follows: In use, the sealing assembly groove 4 and the adhesive membrane sleeve 3 are first assembled into the inner liner body 1 and the sealing assembly groove 4. Then, strong adhesive is applied to the first assembly groove 6 and the second assembly groove 17 of the inner liner body 1 and the composite pipe body 10. By first putting the vacuum membrane sleeve 7 onto the inner liner body 1, the vacuum membrane sleeve 7 is completely adhered to the outer wall of the inner liner body 1, so that the assembly hole 8 and the assembly connecting pin seat 9 meet and correspond. Then, the first sleeve 1001 and the second sleeve 1002 are assembled. The first sleeve 1001 and the second sleeve 1002 are connected by the assembly head 14. The assembly socket 15 can be assembled together, and is also bonded to the vacuum membrane sleeve 7 by strong adhesive. Simultaneously, the assembly pin 18 is assembled into the assembly connecting pin seat 9 through the assembly socket 16, thereby positioning, fixing, and bearing the inner liner body 1. The inner liner body 1 and the composite tube body 10 can break through the adhesive membrane sleeve 3, allowing the top of the inner liner body 1 to fit tightly against the inner wall of the composite tube body 10, ensuring a tight seal between them. Applying the inner liner coating 5 to the inner wall of the inner liner body 1 provides rust prevention, while simultaneously... The outer wall is coated with a protective coating 29, which protects the composite pipe body 10 and prevents rust. The composite pipe bodies 10 are connected by assembly connectors 30 and sealing gaskets, facilitating the transportation of urban water. The connector 19 on the vacuum membrane sleeve 7 can be connected to the connection probe 12 via connector 13. The connection probe 12 is sealed with the connector 13 via sealing nut 26 and gasket. When performing vacuum degree testing, press the pressing rod 20. The pressure bar 20 can push the sealing plate 23 to move away from the pressing rod 20, and at the same time compress the elastic component 25. The sealing plate 23 slides in the control groove 22 through the matching slider 27 and the matching track 28, so as to ensure the sealing of the connection while sliding. At the same time, the moving sealing plate 23 can make the matching groove hole 24 and the connecting channel 21 correspond to each other and connect, so that the vacuum measuring instrument 11 can measure the vacuum degree in the vacuum membrane sleeve 7, so as to promptly know whether there is a problem of rupture between the inner liner body 1 and the composite tube body 10.

[0029] With the above-mentioned settings, this application will certainly solve the above-mentioned technical problems, and at the same time achieve the following technical effects: The composite pipe body 10 provided by the present invention can be assembled and used on site through the first sleeve 1001 and the second sleeve 1002, thereby improving the convenience of the composite pipe during assembly and use. Furthermore, the assembly head 14 and the assembly socket 15 can be used to facilitate the disassembly of the composite pipe body 10 during inspection and maintenance, thus making it easier to find the specific location of the problem inside the pipe.

[0030] The inner lining body 1 and the composite pipe body 10 of the present invention are used in cooperation with each other. The assembly connecting pin seat 9 and the assembly insertion hole 16 are equally distributed on the inner lining body 1 and the composite pipe body 10, and the assembly pin 18 is installed in the assembly connecting pin seat 9 and the assembly insertion hole 16. This can ensure the tightness of the connection between the inner lining body 1 and the composite pipe body 10, avoid the problem of the inner lining body 1 tilting and rolling, and play a positioning and bearing role.

[0031] In this invention, a vacuum membrane sleeve 7 is bonded to the first assembly groove 6 and the second assembly groove 17 using a strong adhesive. This allows the vacuum membrane sleeve 7 to adhere to the inner lining body 1 and the composite pipe body 10. At the same time, the vacuum membrane sleeve 7 facilitates the detection of cracks inside the pipe. Furthermore, the vacuum membrane sleeve 7 enables the pipe itself to provide heat insulation, sound insulation, and odor isolation, thereby improving the practical performance of the pipe.

[0032] The vacuum measuring instrument 11 of this invention is connected to the vacuum membrane sleeve 7 via a connecting probe 12, a connector 13, a connecting channel 21, and a matching slot 24. This allows for convenient measurement of the vacuum level inside the vacuum membrane sleeve 7. By observing changes in the vacuum level, it is easy to understand whether there is a crack between the inner liner body 1 and the composite tube body 10. This also allows for timely understanding of the operational status of the inner liner body 1 and the composite tube body 10 during maintenance.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite pipe, comprising a composite pipe body (10) and a protective coating (29) applied to its outer surface, characterized in that: The composite tube body (10) is composed of a first sleeve (1001) and a second sleeve (1002). An assembly head (14) and an assembly insertion hole (15) are provided at the connection between the first sleeve (1001) and the second sleeve (1002). The assembly head (14) is fixed to the second sleeve (1002), and the assembly insertion hole (15) is opened on the first sleeve (1001). Both the first sleeve (1001) and the second sleeve (1002) are provided with assembly insertion holes (16), and assembly pins (18) are installed in the assembly insertion holes (16). The first sleeve (1001) and the second sleeve... The inner wall of the tube (1002) is provided with a second assembly groove (17). The first sleeve (1001) is connected to the second sleeve (1002) by an assembly head (14) and an assembly insertion hole (15). The connection between the first sleeve (1001) and the second sleeve (1002) is tightly fitted. Both ends of the composite tube body (10) are provided with assembly connectors (30), and sealing gaskets are attached to the assembly connectors (30). The inner lining body (1) is coated with an inner lining coating (5). The top of the outer wall of the inner lining body (1) is provided with a sealing assembly groove (4). The sealing assembly groove (4) is equipped with a sealing ring (2) and an adhesive film sleeve (3), and the sealing ring (2) is located inside the adhesive film sleeve (3). The outer wall of the inner liner body (1) is provided with a first assembly groove (6), and a vacuum film sleeve (7) is installed in the first assembly groove (6). The vacuum film sleeve (7) has an assembly hole (8), and an assembly connecting pin seat (9) is provided in the assembly hole (8). The end of the assembly connecting pin seat (9) is fixed on the inner liner body (1). Both the first assembly groove (6) and the second assembly groove (17) are coated with strong adhesive. The first assembly groove (6) The second assembly groove (17) and the vacuum membrane sleeve (7) are connected by adhesive. The outer wall of the top end of the inner liner body (1) is tightly attached to the inner wall of the composite tube body (10) through the sealing ring (2), and the outer wall of the top end of the inner liner body (1) is connected to the inner wall of the composite tube body (10) through the adhesive membrane sleeve (3). The inner liner body (1) is snapped to the composite tube body (10) through the assembly connecting pin seat (9) and the assembly insertion hole (16), and the composite tube body (10) is fixedly connected to the inner liner body (1) through the assembly pin (18), the assembly connecting pin seat (9), and the assembly insertion hole (16).

2. A pipe sealing detection device, characterized in that, Includes the stainless steel pipe liner as described in claim 1; A vacuum measuring instrument (11) is used to measure the vacuum membrane sleeve (7). The vacuum measuring instrument (11) is installed on the outer wall of the composite tube body (10). The input end of the vacuum measuring instrument (11) is connected to a connecting probe (12). The other end of the connecting probe (12) is connected to a connector (13). A sealing connecting nut (26) and a gasket are provided between the connector (13) and the connecting probe (12). The bottom end of the connector (13) is connected to a connector (19). The component (19) is provided with a connecting channel (21) and a control groove (22). One end of the connector (19) is provided with a pressing rod (20). A sealing plate (23) is provided on one side of the pressing rod (20). Matching sliders (27) are fixed at both the upper and lower ends of the sealing plate (23). Matching rails (28) are provided on the outer side of the matching sliders (27). Matching slots (24) are opened on the sealing plate (23). An elastic component (25) is installed at the end of the sealing plate (23) away from the pressing rod (20).

3. The pipeline sealing detection device according to claim 2, characterized in that: The vacuum measuring instrument (11) is connected to the vacuum diaphragm sleeve (7) through the connecting probe (12), connector (13), connecting channel (21), and matching slot (24), and the connecting channel (21) and matching slot (24) are mutually matched.

4. The pipeline sealing detection device according to claim 3, characterized in that: The sealing plate (23) elastically extends and retracts in the control groove (22) via the pressing rod (20) and the elastic component (25). The matching slider (27) and the matching track (28) are matched in size. The sealing plate (23) slides in the control groove (22) via the matching slider (27) and the matching track (28).

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