Internal repair detection device for underground gas pipeline

Abstract

The utility model relates to the technical field of pipeline detection, in particular to an underground gas pipeline internal repair detection device. According to the technical scheme, the device comprises a central tube and annular air bags, head rings are symmetrically arranged at the two ends of the central tube, the annular air bags are arranged on the head rings, isolation assemblies are arranged on the head rings and used for shielding and protecting the annular air bags, and air inlets of the two annular air bags are connected with the same expansion tube. A central pipe is arranged in the expansion pipe, a pressurizing pipe penetrates through the central pipe, inflation assemblies are arranged at the ends of the expansion pipe and the pressurizing pipe and used for inflating and deflating, and a pressure measuring assembly is arranged on the central pipe and used for detecting pressure changes. According to the utility model, the repair area can be accurately positioned in the pipeline, a closed space can be accurately formed in the repair area, the pressure change after pressurization can be detected in real time through the pressure gauge, and the air tightness state of the repair area can be visually fed back.

Description

Technical Field

[0001] This utility model relates to the field of pipeline inspection technology, and in particular to an internal repair and inspection device for underground gas pipelines. Background Technology

[0002] With the widespread use of underground gas pipelines, cracks or holes may appear in the pipelines during long-term use, affecting their safety and stability. After repair, traditional methods cannot quickly detect the condition of the repaired area, especially the inability to determine in real time whether there is a gas leak in the repaired pipeline, which may affect the safe operation of the gas pipeline.

[0003] Therefore, we propose an internal repair and inspection device for underground gas pipelines to address the existing problems. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a repair and detection device for underground gas pipelines.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an underground gas pipeline repair and detection device, comprising a central tube and an annular airbag. The central tube has symmetrically arranged head rings at both ends, each head ring being made of a strong magnetic material. An annular airbag is mounted on each head ring, and an isolation component is provided on each head ring to shield and protect the annular airbag. The air inlets of the two annular airbags are connected to the same expansion tube. A pressurization tube runs through the central tube. An inflation component is provided at the ends of both the expansion tube and the pressurization tube, and the inflation component is used for inflation and deflation. A pressure measuring component is also provided on the central tube to detect pressure changes.

[0006] Preferably, the pressure measuring assembly consists of a pressure measuring tube and a pressure gauge, with one end of the pressure measuring tube passing through the central tube and the pressure gauge located at the other end of the pressure measuring tube.

[0007] Preferably, the isolation assembly consists of a protective cover, a pull ring, and an arc-shaped protrusion. The arc-shaped protrusion is equidistantly disposed on the outer wall of the head ring. The protective cover is snapped onto the arc-shaped protrusion by plastic deformation. The pull ring is disposed on the outer wall of the protective cover.

[0008] Preferably, the inflation assembly consists of a connecting chamber, a connecting rod, a valve plate, a spring, a slider, a through hole, and an inflation chamber. The connecting chamber is connected to the expansion tube and the pressurization tube respectively. The inflation chamber is located on the connecting chamber. The slider is square in design and is slidably located in the inflation chamber. The through holes are equidistantly opened on the slider.

[0009] Preferably, one end of the connecting rod is disposed on the slide head, the valve plate is disposed on the other end of the connecting rod, the spring is sleeved on the connecting rod and its two ends respectively abut against the connecting chamber and the slide head, and the valve plate abuts against the inner wall of the connecting chamber under the action of the spring.

[0010] Preferably, a sealing gasket is provided at the contact position between the valve plate and the connecting chamber.

[0011] Preferably, the head ring is provided with a screw ring, and the screw ring is threaded on the central tube.

[0012] Preferably, the outer wall of the central tube is provided with a stop, the screw ring abuts against the stop and a sealing gasket is provided at the contact position between the two.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] In use, the underground gas pipeline repair and detection device of this utility model is inserted into the gas pipeline so that the repair position inside the gas pipeline is between two head rings. The head rings are made of strong magnetic material. During the movement of the head rings inside the pipeline, personnel can use another strong magnetic block on the outer wall of the pipeline to pull the head rings to the designated position.

[0015] Furthermore, the protective cover can shield and protect the airbag when the device is not in use.

[0016] Then, the inflation component on the expansion pipe is connected to the external air pump structure, and the airbag is inflated, thus forming a closed space between the repair location inside the gas pipeline, the outer wall of the central pipe, and the head ring. Then, the inflation component on the pressurization pipe is connected to the air pump structure to inflate and pressurize the closed space. At this time, the pressure gauge detects and displays the pressure. If there is no significant change in the pressure gauge after a period of time, it indicates that the underground gas pipeline has been successfully repaired.

[0017] Furthermore, the inflation component forms a one-way inflation structure during inflation. When deflation is needed, the deflation action can be completed by using a tool to move the slider. The one-way inflation structure ensures that the gas will not flow back during inflation, making the inflation process stable and reliable. At the same time, the deflation function is simple and easy to operate, which helps to quickly adjust and restore the normal state.

[0018] This invention features a strong magnetic head ring that works in conjunction with an external strong magnetic block to facilitate precise positioning of the repair area within a pipeline. It can accurately form a closed space in the repair area and uses a pressure gauge to monitor the pressure changes after pressurization, providing direct feedback on the airtightness of the repair area. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 For the present utility model Figure 1 A partial sectional view of the structure;

[0021] Figure 3 This is a schematic diagram of the isolation component structure of this utility model;

[0022] Figure 4 This is a schematic diagram showing the positional distribution of the pressure measuring tube and the pressurizing tube of this utility model;

[0023] Figure 5 This is a schematic diagram of the inflatable component structure of this utility model.

[0024] Figure label:

[0025] 1. Central tube; 2. Head ring; 3. Stop seat; 4. Protective cover; 5. Pull ring; 6. Expansion tube; 7. Pressurization tube; 8. Connecting chamber; 9. Pressure measuring tube; 10. Pressure gauge; 11. Annular air bladder; 12. Screw ring; 13. Arc-shaped convexity; 14. Connecting rod; 15. Valve plate; 16. Spring; 17. Slider; 18. Through hole; 19. Inflation chamber. Detailed Implementation

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

[0027] Example 1

[0028] like Figures 1-5 As shown, this utility model proposes an underground gas pipeline repair and inspection device, including a central pipe 1 and an annular airbag 11. Head rings 2 are symmetrically arranged at both ends of the central pipe 1. The head rings 2 are made of strong magnetic material and have screw rings 12 threaded onto them. A stop 3 is provided on the outer wall of the central pipe 1, and the screw rings 12 abut against the stop 3. A sealing gasket is provided at the contact point between the two. Through the cooperation of the above structures, the head rings 2 can be easily disassembled and replaced. The sealing gasket design ensures the airtightness at the connection point. During use, the device is inserted into the gas pipeline, so that the repair location inside the gas pipeline is between the two head rings 2. Since the head rings 2 are made of strong magnetic material, during the movement of the head rings 2 inside the pipeline, personnel can use another strong magnetic block on the outer wall of the pipeline to pull them to the designated location.

[0029] The head ring 2 is equipped with annular airbags 11. The air inlets of the two annular airbags 11 are connected to the same expansion tube 6. A pressurization tube 7 is installed through the central tube 1. Both the expansion tube 6 and the pressurization tube 7 are equipped with inflation components. The inflation components are used for inflation and deflation. The inflation components on the expansion tube 6 are connected to an external air pump structure. Gas enters the two annular airbags 11 through the expansion tube 6. The airbags inflate and expand, thereby forming a closed space between the repair position inside the gas pipeline, the outer wall of the central tube 1, and the head ring 2. The inflation components on the pressurization tube 7 are connected to an air pump structure to inflate and pressurize the closed space.

[0030] The inflation assembly consists of a connecting chamber 8, a connecting rod 14, a valve plate 15, a spring 16, a slider 17, a through hole 18, and an inflation chamber 19. The connecting chamber 8 is connected to the expansion pipe 6 and the pressurization pipe 7, respectively. The inflation chamber 19 is located on the connecting chamber 8. The slider 17 is square in design and slides within the inflation chamber 19. The through holes 18 are equidistantly spaced on the slider 17. One end of the connecting rod 14 is located on the slider 17, and the valve plate 15 is located on the other end of the connecting rod 14. The spring 16 is sleeved on the connecting rod 14, with its two ends respectively abutting between the connecting chamber 8 and the slider 17. The valve plate 15 rests on the spring 16. Under the action of the air pump, the airflow enters the inflation chamber 19 and flows through the through hole 18 to squeeze the valve plate 15. Under the action of pressure, the valve plate 15 moves away from the inner wall of the connecting chamber 8. At this time, the spring 16 is compressed and deformed, thus generating elastic force. Under the action of inflation air pressure and the elastic force of the spring 16, the valve plate 15 is pressed tightly against the connecting chamber 8. The above constitutes a one-way inflation structure. When the airflow passage in the inflation component is opened, the inflation action is completed. When it is necessary to deflate, the deflation action can be completed by using a tool to push against the slider 17.

[0031] A sealing gasket is provided at the contact position between the valve plate 15 and the connecting chamber 8.

[0032] Example 2

[0033] like Figures 1-5 As shown, the underground gas pipeline repair and detection device proposed in this utility model, compared with the first embodiment, further includes: a pressure measuring component is provided on the central pipe 1. The pressure measuring component is used to detect pressure changes. The pressure measuring component consists of a pressure measuring tube 9 and a pressure gauge 10. One end of the pressure measuring tube 9 is inserted through the central pipe 1, and the pressure gauge 10 is located at the other end of the pressure measuring tube 9. The pressure gauge 10 detects and displays the pressure. If there is no obvious change in the pressure gauge 10 after a period of time, it indicates that the underground gas pipeline repair is successful.

[0034] The headband 2 is equipped with an isolation component, which is used to shield and protect the annular airbag 11. The isolation component consists of a protective cover 4, a pull ring 5, and an arc-shaped protrusion 13. The arc-shaped protrusion 13 is equidistantly arranged on the outer wall of the headband 2. The protective cover 4 is plastically deformed and snapped onto the arc-shaped protrusion 13. The pull ring 5 is located on the outer wall of the protective cover 4. Before the device is used, the protective cover 4 can be pulled by the pull ring 5 to detach the protective cover 4 from the arc-shaped protrusion 13. Through the design of the protective cover 4, the airbag can be shielded and protected when the device is not in use.

[0035] It should be noted that the structure of pressure gauge 10 is a mature existing technology, and its working principle and internal structure are known to those skilled in the art. This utility model only utilizes its function and does not improve its internal structure. Therefore, it will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0036] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A repair and inspection device for underground gas pipelines, comprising a central pipe (1) and an annular airbag (11), characterized in that: The central tube (1) has symmetrical head rings (2) at both ends. The head rings (2) are made of strong magnetic material. The head rings (2) are equipped with annular airbags (11). The head rings (2) are equipped with isolation components. The isolation components are used to shield and protect the annular airbags (11). The air inlets of the two annular airbags (11) are connected to the same expansion tube (6). The central tube (1) is equipped with a pressurizing tube (7). The ends of the expansion tube (6) and the pressurizing tube (7) are equipped with inflation components. The inflation components are used for inflation and deflation. The central tube (1) is equipped with a pressure measuring component. The pressure measuring component is used to detect pressure changes.

2. The underground gas pipeline repair and inspection device according to claim 1, characterized in that: The pressure measuring assembly consists of a pressure measuring tube (9) and a pressure gauge (10). One end of the pressure measuring tube (9) is installed through the central tube (1), and the pressure gauge (10) is installed at the other end of the pressure measuring tube (9).

3. The underground gas pipeline repair and inspection device according to claim 1, characterized in that: The isolation assembly consists of a protective cover (4), a pull ring (5), and an arc-shaped protrusion (13). The arc-shaped protrusion (13) is equidistantly disposed on the outer wall of the head ring (2). The protective cover (4) is snapped onto the arc-shaped protrusion (13) by plastic deformation. The pull ring (5) is disposed on the outer wall of the protective cover (4).

4. The underground gas pipeline repair and inspection device according to claim 1, characterized in that: The inflation assembly consists of a connecting chamber (8), a connecting rod (14), a valve plate (15), a spring (16), a slider (17), a through hole (18), and an inflation chamber (19). The connecting chamber (8) is connected to the expansion tube (6) and the pressurization tube (7) respectively. The inflation chamber (19) is located on the connecting chamber (8). The slider (17) is square in design and is slidably located in the inflation chamber (19). The through holes (18) are equidistantly opened on the slider (17).

5. The underground gas pipeline repair and inspection device according to claim 4, characterized in that: One end of the connecting rod (14) is located on the slide head (17), the valve plate (15) is located on the other end of the connecting rod (14), the spring (16) is sleeved on the connecting rod (14) and its two ends are respectively abutted between the connecting chamber (8) and the slide head (17), and the valve plate (15) abuts against the inner wall of the connecting chamber (8) under the action of the spring (16).

6. The underground gas pipeline repair and inspection device according to claim 5, characterized in that: A sealing gasket is provided at the contact position between the valve plate (15) and the connecting chamber (8).

7. The underground gas pipeline repair and inspection device according to claim 1, characterized in that: The head ring (2) is provided with a screw ring (12), which is threaded onto the central tube (1).

8. The underground gas pipeline repair and inspection device according to claim 7, characterized in that: The outer wall of the central tube (1) is provided with a stop (3), and the screw ring (12) abuts against the stop (3) and a sealing gasket is provided at the contact position between the two.

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