A gas pipeline airtightness detection device

Abstract

The utility model discloses a kind of gas pipeline airtightness detection devices, it is related to pipeline airtightness detection technical field, including fixed plate and water immersion component, water immersion component is sleeved in the outside of pipeline for the observation of pipeline airtightness, the left and right ends of fixed plate are all fixed with disc, annular gasbag A is fixedly installed in the circumferential side of disc, two rollers A are installed on fixed plate, the right side of right side disc is fixed with supporting plate. Two rollers B are rotated using driving motor drive, two discs are gradually moved in pipeline inside, two annular gasbag A are inflated using air pump B, so that two annular gasbag A expand, cooperate two discs to realize local plugging to pipeline inside, air pump A is inflated between two discs along gas pipe, so that the air pressure between two discs increases, water immersion component and two discs move synchronously, the pipeline between two discs can be immersed in water, whether overflow bubble is observed to pipeline, to complete the overall detection of the whole pipeline airtightness gradually.

Description

Technical Field

[0001] This utility model relates to the field of pipeline air tightness testing technology, and in particular to a gas pipeline air tightness testing device. Background Technology

[0002] In recent years, polyethylene has gradually replaced steel pipes due to its strong corrosion resistance, long service life, good toughness, good insulation properties, relatively low cost, and ease of construction and maintenance. It has been widely used in municipal and building water supply and drainage, gas heating, agricultural irrigation, and mining mineral transportation. Especially in the gas sector, the introduction of a series of national standards has accelerated the process of replacing steel with plastic in my country's gas pipeline network.

[0003] To prevent leaks in polyethylene (PE) pipes during gas transmission, their airtightness must be tested before gas is supplied to ensure safe and stable gas delivery. The traditional testing method involves sealing both ends of the gas pipe, pressurizing it, and then submerging it entirely in a water tank to observe for air bubbles. While intuitive, this method is not simple to implement for long gas pipes, requires an excessively large water tank, and consumes a significant amount of water, making it unsuitable for practical applications. Utility Model Content

[0004] The purpose of this application is to provide a gas pipeline airtightness testing device to solve the problem mentioned in the background art that the traditional testing method involves sealing both ends of the gas pipeline, pressurizing it, and then immersing it entirely in a water tank to observe whether air bubbles escape in order to determine the airtightness of the gas pipeline. Although this method is intuitive, it is not simple to operate in practice for long gas pipelines. The required water tank is too large, and the amount of water used is also too large, so it is difficult to meet the actual use needs.

[0005] To achieve the above objectives, this application provides the following technical solution: a gas pipeline airtightness testing device, comprising a fixing plate and a water immersion assembly, wherein the water immersion assembly is sleeved on the outside of the pipeline for observing the pipeline airtightness; a disc is fixed to the left and right ends of the fixing plate; an annular airbag A is fixedly installed on the circumferential side of the disc; two rollers A are installed on the fixing plate; a support plate is fixed to the right side of the disc on the right side; an air pump A, an air pump B, and an electric push rod are installed on the top of the support plate; the air outlet of the air pump A is fixedly connected to an air supply pipe; and the disc on the right side is fixedly sleeved on the outside of the air supply pipe. The unit has a connecting pipe fixedly connected between the two annular airbags A, and an air supply pipe A fixedly connected between the air outlet of the air pump B and the right annular airbag A. A drive motor and an exhaust assembly are installed at the bottom of the support plate. Rollers B are fixed at both ends of the output shaft of the drive motor. A carrier block is fixedly installed at the output end of the electric push rod. A rotating rod is fixed on the carrier block. Rollers C are installed at both ends of the rotating rod. The exhaust assembly is used to exhaust the air in the annular airbag A. A water filling and draining assembly is installed at the bottom of the water immersion assembly. The water filling and draining assembly is used to adjust the water level in the water immersion assembly.

[0006] Furthermore, the exhaust assembly includes an air pump C, which is installed at the bottom of the support plate, and an air inlet of the air pump C is fixedly connected to the right annular airbag A by an air guide tube.

[0007] Furthermore, the water immersion assembly includes a water tank, with through holes on the left and right sides of the water tank. An annular airbag B is fixed inside the through hole, and both annular airbags B are sleeved on the outside of the pipe. A carrier plate is fixed on the top of the water tank, and two air pumps D are installed on the carrier plate. An air supply pipe B is fixedly connected between the air outlet of the air pump D and the annular airbag B, and an exhaust pipe is fixedly connected to the air supply pipe B.

[0008] Furthermore, a barometer is installed on the gas pipeline B.

[0009] Furthermore, two rollers A are rotatably connected between the front and rear inner walls of the water tank via bearings, and U-shaped seats are fixed on the left and right sides of the water tank. Rollers B are rotatably connected between the opposite inner walls of the U-shaped seats via bearings.

[0010] Furthermore, the water filling and discharging assembly includes a water storage tank, which is installed at the bottom of the water tank. A return pipe is fixedly connected between the water storage tank and the water tank. Valves are installed on both the exhaust pipe and the return pipe. A water pump is installed on the water storage tank. The inlet of the water pump is connected to the water storage tank, and a water delivery pipe is fixedly connected between the outlet of the water pump and the water tank.

[0011] Furthermore, the bottom of the water storage tank is equipped with several omnidirectional casters.

[0012] In summary, the technical effects and advantages of this utility model are as follows:

[0013] 1. In this utility model, an electric push rod is used to push two rollers C upwards, so that both rollers B and rollers C abut against the inner wall of the pipe. A drive motor drives two rollers B to rotate, allowing the two discs to move gradually inside the pipe. An air pump B inflates two annular airbags A, causing them to expand. This, together with the two discs, partially seals the inside of the pipe. The air pump A inflates between the two discs along the air supply pipe, increasing the air pressure between them. The water immersion component moves synchronously with the two discs, immersing the pipe between them in water. By observing whether air bubbles overflow from the pipe, a comprehensive test of the airtightness of the entire pipe is gradually completed. This method is more practical and reduces water consumption.

[0014] 2. In this utility model, air pump D is used to send air to air supply pipe B. The air is sent along air supply pipe B to the inside of annular airbag B, so that after the annular airbag B expands, it fits tightly with the pipe. In this way, when the water tank is filled with water and submerges the pipe, the water will not overflow between the pipe and the annular airbag B.

[0015] 3. In this utility model, opening the valve on the return pipe facilitates the flow of water from the water tank into the interior of the water storage tank, thereby lowering the water level in the water tank and avoiding water waste. A water pump can be used to send the water in the water storage tank back into the water tank, ensuring that the water can submerge the pipe when the water tank is used for pipe airtightness testing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a gas pipeline airtightness testing device according to an embodiment of this application;

[0018] Figure 2 This is a diagram showing the positional relationship between the fixed plate, the disc, the annular airbag A, and the roller A in the embodiments of this application.

[0019] Figure 3 This is a diagram showing the positional relationship between the disc, tray, roller B, and exhaust assembly in the embodiments of this application.

[0020] Figure 4 This is a schematic diagram of the structure of the water immersion component in the embodiments of this application;

[0021] Figure 5 This is a schematic diagram of the water filling and draining assembly in an embodiment of this application.

[0022] In the diagram: 1. Fixed plate; 2. Disc; 3. Annular airbag A; 4. Roller A; 5. Support plate; 6. Air pump A; 7. Air supply pipe; 8. Connecting pipe; 9. Air pump B; 10. Air delivery pipe A; 11. Drive motor; 12. Roller B; 13. Electric push rod; 14. Carrier block; 15. Roller C; 16. Air pump C; 17. Air guide pipe; 18. Water tank; 19. Annular airbag B; 20. Carrier plate; 21. Air pump D; 22. Air delivery pipe B; 23. Exhaust pipe; 24. Barometer; 25. Idler roller A; 26. U-shaped seat; 27. Idler roller B; 28. Water storage tank; 29. ​​Return pipe; 30. Water pump; 31. Water supply pipe; 32. Universal caster. Detailed Implementation

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

[0024] Example: Reference Figure 1-5 The device shown is a gas pipeline airtightness testing device, including a fixed plate 1 and a water immersion assembly. The water immersion assembly is sleeved on the outside of the pipeline for observing the airtightness of the pipeline. A disc 2 is fixed to both the left and right ends of the fixed plate 1. An annular airbag A3 is fixedly installed on the circumferential side of the disc 2. Two rollers A4 are installed on the fixed plate 1. A support plate 5 is fixed to the right side of the right disc 2. An air pump A6, an air pump B9, and an electric push rod 13 are installed on the top of the support plate 5. The air outlet of the air pump A6 is fixedly connected to an air supply pipe 7. The right disc 2 is fixedly sleeved on the outside of the air supply pipe 7. A connecting pipe 8 is fixedly connected between the two annular airbags A3. The air outlet of the air pump B9 is connected to... An air supply pipe A10 is fixedly connected between the right-side annular airbags A3. A drive motor 11 and an exhaust assembly are installed at the bottom of the support plate 5. Rollers B12 are fixed at both output shaft ends of the drive motor 11. A carrier block 14 is fixedly installed at the output end of the electric push rod 13. A rotating rod is fixed on the carrier block 14. Rollers C15 are installed at both ends of the rotating rod. The two rollers A4 are used to cooperate with the two rollers B12 and the two rollers C15 to better support the two discs 2 to move inside the pipe. The exhaust assembly is used to expel the air in the annular airbags A3. A water filling and draining assembly is installed at the bottom of the water immersion assembly. The water filling and draining assembly is used to adjust the water level in the water immersion assembly.

[0025] The electric push rod 13 pushes the two rollers C15 upward, so that the two rollers B12 and the two rollers C15 are both against the inner wall of the pipe. The drive motor 11 drives the two rollers B12 to rotate, so that the two discs 2 can move gradually inside the pipe. The air pump B9 inflates the two annular airbags A3, causing the two annular airbags A3 to expand. Together with the two discs 2, they can partially seal the inside of the pipe. The air pump A6 inflates the space between the two discs 2 along the air supply pipe 7, increasing the air pressure between the two discs 2. The water immersion component moves synchronously with the two discs 2, which can immerse the pipe between the two discs 2 in water. By observing whether air bubbles overflow from the pipe, the airtightness of the entire pipe can be fully tested step by step.

[0026] The exhaust assembly includes an air pump C16, which is installed at the bottom of the support plate 5. The air inlet of the air pump C16 is fixedly connected to the right annular airbag A3 by an air guide pipe 17. The air pump C16 draws air out of the two annular airbags A3 along the air guide pipe 17, causing the two annular airbags A3 to contract, making it easier for them to move with the disc 2, so as to gradually complete the test of the pipeline airtightness.

[0027] The water immersion component includes a water tank 18, with through holes on the left and right sides of the water tank 18. Annular airbags B19 are fixed inside the through holes. Both annular airbags B19 are sleeved on the outside of the pipe. A carrier plate 20 is fixed on the top of the water tank 18. Two air pumps D21 are installed on the carrier plate 20. An air supply pipe B22 is fixedly connected between the air outlet of the air pump D21 and the annular airbags B19. An exhaust pipe 23 is fixedly connected to the air supply pipe B22. A valve is installed on the exhaust pipe 23. A barometer 24 is installed on the air supply pipe B22.

[0028] Air is supplied to the air pipe B22 by the air pump D21. The air is sent to the inside of the annular airbag B19 along the air pipe B22, so that the annular airbag B19 expands and fits tightly against the pipe. In this way, when the water tank 18 fills the pipe and submerges it, the water will not overflow between the pipe and the annular airbag B19. Opening the valve on the exhaust pipe 23 allows the air in the annular airbag B19 to be discharged, so that the annular airbag B19 is no longer tightly against the pipe, making it easier for the water tank 18 to move along the pipe. The air pressure of the annular airbag B19 after inflation can be easily observed with the air gauge 24 to ensure that the air pressure reaches the predetermined value, so as to ensure that the annular airbag B19 fits tightly against the pipe after inflation.

[0029] Two rollers A25 are rotatably connected between the front and rear inner walls of the water tank 18 via bearings. U-shaped seats 26 are fixed on the left and right sides of the water tank 18. Rollers B27 are rotatably connected between the opposite inner walls of the U-shaped seats 26 via bearings. The two rollers A25 and two rollers B27 are used to support the pipe, distribute the force on the annular airbag B19, and ensure that the annular airbag B19 can fit tightly against the pipe after inflation to prevent water from overflowing from the water tank 18.

[0030] The water filling and discharging assembly includes a water storage tank 28, which is installed at the bottom of the water tank 18. A return pipe 29 is fixedly connected between the water storage tank 28 and the water tank 18. A valve is installed on the return pipe 29. A water pump 30 is installed on the water storage tank 28. The inlet of the water pump 30 is connected to the water storage tank 28. A water supply pipe 31 is fixedly connected between the outlet of the water pump 30 and the water tank 18. Multiple omnidirectional casters 32 are installed at the bottom of the water storage tank 28.

[0031] Open the valve on the return pipe 29 to allow water in the water tank 18 to flow into the water storage tank 28, thereby lowering the water level in the water tank 18 and avoiding water waste. The water pump 30 can be used to send the water in the water storage tank 28 back into the water tank 18 to ensure that the water in the water tank 18 can submerge the pipe when it is used for pipe air tightness testing. The multiple omnidirectional casters 32 facilitate the use of the water immersion assembly and the water filling and discharging assembly, which move with the two discs 2 to cooperate with the pipe air tightness testing.

[0032] Working principle of this utility model:

[0033] The two discs 2 and the two rollers B12 are sent into the pipe. The electric push rod 13 is extended so that the electric push rod 13 pushes the two rollers C15 to fit against the inner wall of the pipe. The drive motor 11 is activated to drive the two rollers B12 to rotate. The two rollers B12 and the two rollers C15 can make the two discs 2 move inside the pipe. At the same time, the water immersion component and the water filling and draining component will follow the two discs 2 with the help of multiple universal casters 32.

[0034] When performing an airtightness test on the pipeline, stop the operation of the drive motor 11, start the air pump B9 to inflate the two annular airbags A3, so that the two annular airbags A3 expand and fit tightly against the inner wall of the pipeline. Then, operate the air pump A6 to inflate between the two discs 2, so that the air pressure between the two discs 2 increases and the two annular airbags B19 are fitted onto the outside of the pipeline. Start the two air pumps D21 to inflate the two annular airbags B19, so that the two annular airbags B19 expand and become larger, and the two annular airbags B19 fit tightly against the pipeline. Start the water pump 30 to inject water into the water tank 18, so that the water level in the water tank 18 gradually submerges the pipeline. After the pipeline is submerged, observe whether the pipeline leaks air and determine the airtightness of this section of the pipeline.

[0035] Next, open the valve on the return pipe 29 to allow the water in the water tank 18 to flow back into the water storage tank 28. The water level in the water tank 18 drops to below the pipe. Open the valve on the exhaust pipe 23 to expel the air from the annular airbag B19, so that the annular airbag B19 is no longer tightly attached to the pipe, making it easier for the water tank 18 to continue moving along the pipe. Activate the air pump C16 to expel the air from the two annular airbags A3, causing the two annular airbags A3 to contract. Then, operate the drive motor 11 to drive the two discs 2 to continue moving, gradually completing the airtightness test of the entire pipeline.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas pipeline airtightness testing device, comprising a fixing plate (1), characterized in that: It also includes a water immersion assembly, which is fitted onto the outside of the pipe for observing the pipe's airtightness. A disc (2) is fixed to both the left and right ends of the fixing plate (1). An annular airbag A (3) is fixedly installed on the circumferential side of the disc (2). Two rollers A (4) are installed on the fixing plate (1). A support plate (5) is fixed to the right side of the disc (2). An air pump A (6), an air pump B (9), and an electric push rod (13) are installed on the top of the support plate (5). The air outlet of the air pump A (6) is fixedly connected to an air supply pipe (7). The disc (2) on the right side is fixedly fitted onto the outside of the air supply pipe (7). The two annular airbags A (3) are fixedly connected. There is a connecting pipe (8), and the air outlet of the air pump B (9) is fixedly connected to the right annular airbag A (3) by an air supply pipe A (10). The bottom of the support plate (5) is equipped with a drive motor (11) and an exhaust assembly. Rollers B (12) are fixed at both output shaft ends of the drive motor (11). A carrier block (14) is fixedly installed at the output end of the electric push rod (13). A rotating rod is fixed on the carrier block (14). Rollers C (15) are installed at both ends of the rotating rod. The exhaust assembly is used to exhaust the air in the annular airbag A (3). A water filling and draining assembly is installed at the bottom of the water immersion assembly. The water filling and draining assembly is used to adjust the water level in the water immersion assembly.

2. The gas pipeline airtightness testing device according to claim 1, characterized in that: The exhaust assembly includes an air pump C (16), which is installed at the bottom of the support plate (5). The air inlet of the air pump C (16) is fixedly connected to the right annular airbag A (3) by an air guide tube (17).

3. The gas pipeline airtightness testing device according to claim 1, characterized in that: The water immersion assembly includes a water tank (18), with through holes on the left and right sides of the water tank (18). Annular airbags B (19) are fixed inside the through holes. Both annular airbags B (19) are sleeved on the outside of the pipe. A carrier plate (20) is fixed on the top of the water tank (18). Two air pumps D (21) are installed on the carrier plate (20). An air supply pipe B (22) is fixedly connected between the air outlet of the air pump D (21) and the annular airbags B (19). An exhaust pipe (23) is fixedly connected to the air supply pipe B (22).

4. The gas pipeline airtightness testing device according to claim 3, characterized in that: A barometer (24) is installed on the gas pipeline B (22).

5. The gas pipeline airtightness testing device according to claim 3, characterized in that: Two rollers A (25) are rotatably connected between the front and rear inner walls of the water tank (18) via bearings. U-shaped seats (26) are fixed on the left and right sides of the water tank (18). Rollers B (27) are rotatably connected between the opposite inner walls of the U-shaped seats (26) via bearings.

6. The gas pipeline airtightness testing device according to claim 3, characterized in that: The water filling and discharging assembly includes a water storage tank (28), which is installed at the bottom of the water tank (18). A return pipe (29) is fixedly connected between the water storage tank (28) and the water tank (18). Valves are installed on both the exhaust pipe (23) and the return pipe (29). A water pump (30) is installed on the water storage tank (28). The inlet of the water pump (30) is connected to the water storage tank (28), and a water delivery pipe (31) is fixedly connected between the outlet of the water pump (30) and the water tank (18).

7. A gas pipeline airtightness testing device according to claim 6, characterized in that: The bottom of the water storage tank (28) is equipped with several omnidirectional casters (32).

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