Pipeline airtightness detection system and detection method

Abstract

The invention discloses a pipeline airtightness detection system and method, and relates to the field of pipeline airtightness detection.The pipeline airtightness detection system comprises a detection pool, a first end sealing assembly is arranged on one side of the interior of the detection pool, and the first end sealing assembly can inject high-pressure gas into a pipeline and seal the end of the pipeline; high-pressure gas is injected into the pipeline through a gas filling pipe by opening an air inlet valve, and along with the rise of the pressure in the pipeline, the gas enters the first end sealing assembly by opening an electromagnetic three-way valve to blow a first rubber part outwards, so that the pressure in the first rubber part is higher than the pressure in the pipeline; and therefore, the first rubber part can always press the end part of the pipeline, and the sealing performance of one end of the pipeline can be better.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipeline gas tightness detection, and particularly relates to a pipeline gas tightness detection system and a detection method. BACKGROUND

[0002] Pressure pipeline refers to a pipeline that bears pressure, and is mainly used for conveying gas or liquid. Common pressure pipelines include water supply pipelines, drainage pipelines, gas pipelines and public engineering pipelines. A pressure pipeline gas tightness detection device is a tool that can detect the gas tightness of a pressure pipeline, and its function is to ensure the safe and reliable operation of the pipeline.

[0003] A pressure pipeline gas tightness detection device is disclosed in Chinese Utility Model Patent CN221859866U, which comprises a fixed base, a servo motor, an air pump and a pressure gauge. The fixed base is provided with a servo motor on the side outer wall, and the output shaft of the servo motor is fixedly connected with a transmission rod. The outer wall of the transmission rod is sleeved with a rod sleeve, and the end of the rod sleeve is fixedly provided with a movable base. The upper surfaces of the fixed base and the movable base are respectively fixed with a support, and the upper end surface of the support is bolted with a baffle. The middle inner wall of the baffle is provided with a limiting mechanism. The upper end outer wall of the side of the movable base is fixedly connected with a support arm, and the upper end of the support arm is fixedly provided with a sleeve. The inner wall of the sleeve is movably connected with a pressing rod.

[0004] Although the device can adjust the length of the pipeline, after injecting pressure into the pipeline, the pressure will squeeze the end cover to the two sides, which will require increasing the pressure applied to the end cover to resist the high pressure in the pipeline to complete the sealing of the two ends of the pipeline. The air pressure in the pipeline is easy to cause the deformation of the sealing ring, thereby causing leakage, so that the sealing is difficult. In view of this, the present application is proposed. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a pipeline gas tightness detection system that can overcome the above problems or at least partially solve the above problems.

[0006] To solve the technical problem that after injecting pressure into the pipeline, the pressure will squeeze the end cover to the two sides, which will require increasing the pressure applied to the end cover to resist the high pressure in the pipeline to complete the sealing of the two ends of the pipeline, and the air pressure in the pipeline is easy to cause the deformation of the sealing ring, thereby causing leakage, so that the sealing is difficult, the basic concept of the technical scheme adopted by the present application is: A pipeline gas tightness detection system comprises a detection pool, a first end sealing assembly is arranged on one side of the inside of the detection pool, the first end sealing assembly can inject high-pressure gas into the pipeline, and the end of the pipeline is sealed.

[0007] Further, the first end sealing assembly comprises a first fixed cover, an air inlet pipe is fixedly connected to the outer wall of the first fixed cover, the air inlet pipe penetrates through the detection water tank and is detachably connected with an air inlet valve, the first end sealing assembly is provided with a first rubber part at the end close to the second end sealing assembly, an air filling pipe is fixedly connected to the inner part of the first end sealing assembly and communicates with the air inlet pipe, a fixed end cover is fixedly connected to the outer wall of the air filling pipe close to the end, the fixed end cover is fixedly connected with the first rubber part, the outer wall of the air filling pipe is detachably connected with a first connecting end and a second connecting end of an electromagnetic three-way valve, and the outer wall of the first end sealing assembly is detachably connected with an air outlet valve; the air inlet valve is connected with the air outlet end of an external air compressor, opening the air inlet valve enables high-pressure gas to be injected into the inner part of the pipeline through the air filling pipe, as the pressure in the pipeline increases, the electromagnetic three-way valve is opened to enable the gas to enter the inner part of the first end sealing assembly to blow the first rubber part outward, so that the pressure in the first rubber part is higher than the pressure in the pipeline.

[0008] Further, the outer wall of the air inlet pipe is detachably connected with a rotating disc, and the outer wall of the rotating disc is fixedly connected with a plurality of rotating handles; rotating the rotating disc enables the pipeline to rotate.

[0009] Further, the second end sealing assembly is capable of moving transversely towards the first end sealing assembly to clamp the pipeline between the second end sealing assembly and the first end sealing assembly.

[0010] Further, the second end sealing assembly comprises a second fixed cover, a second rubber part and a third rubber part, the inner part of the second fixed cover is sealed with a certain gas, and the third rubber part is extruded when the pipeline is punched to make the second rubber part bulge outward.

[0011] Further, the inner part of the third rubber part is fixedly connected with a piston cylinder, a gap exists between the piston cylinder and the inner part of the second fixed cover, the inner wall of the third rubber part is fixedly connected with a connecting rod, the distal end of the connecting rod is fixedly connected with a piston plate, and a return spring is arranged between the piston plate and the second fixed cover; when the third rubber part is extruded by the pressure in the pipeline, the connecting rod pushes the piston plate to move transversely and compresses the return spring, and the transverse movement of the piston plate pushes the air to the outside of the piston cylinder and makes the second rubber part bulge outward.

[0012] Further, the second end sealing assembly further comprises an electric telescopic rod, the outer wall of the detection water tank is detachably connected with the electric telescopic rod, and the telescopic end of the electric telescopic rod is rotatably connected with the outer wall of the second fixed cover.

[0013] Further, the water level adjusting assembly is installed outside the detection water tank, the water level adjusting assembly lowers the water level in the detection water tank when the pipeline is installed, and the water level adjusting assembly raises the water level in the detection water tank when detection is performed.

[0014] Further, the water temperature adjusting assembly comprises a water storage tank, the outer wall of one side of the detection water tank is detachably connected with the water storage tank, the bottom of the water storage tank is attached to the ground, the bottom of the detection water tank is detachably connected with the electromagnetic valve, the electromagnetic valve is detachably connected with the backflow pipe, the backflow pipe is connected with and communicates with the outer wall of the water storage tank, one side of the upper end of the water storage tank is provided with a water inlet, the upper end of the water storage tank is detachably connected with the micro water pump, the liquid inlet end of the micro water pump is inserted into the inside of the water storage tank and extends to the bottom, and the liquid outlet end of the micro water pump is inserted into the inside of the detection water tank.

[0015] The application further discloses a pipeline air tightness detection method. S1: placing the pipeline in the inside of the detection water tank; S2: attaching one end of the pipeline to the first end sealing assembly and fixing the pipeline; S3: adding water into the inside of the detection water tank so that the water level is higher than the pipeline; S4: injecting high-pressure gas into the pipeline; S5: observing whether there is air bubble to determine whether the pipeline leaks.

[0016] Compared with the prior art, the application has the following beneficial effects: The application can make the high-pressure gas injected into the inside of the pipeline through the air inlet valve and the air inlet pipe, can make the first rubber part blown outward by opening the electromagnetic three-way valve when the gas enters the inside of the first end sealing assembly, can make the pressure in the first rubber part higher than the pressure in the pipeline, can make the first rubber part always press the end of the pipeline, can make the sealing of one end of the pipeline better, can make the second rubber part more attached to the end of the pipeline and the sealing better when the third rubber part is extruded by the pressure in the pipeline, can make the gas in the first rubber part discharged outward by opening the air outlet valve after the detection, can always keep the high pressure in the first rubber part if too many pipelines are detected, and can make the water in the detection water tank enter the inside of the water storage tank through the backflow pipe when the pipeline to be detected is clamped, thereby reducing the water level in the detection water tank, and can make the water in the water storage tank pumped out by the micro water pump and enter the inside of the detection water tank after the clamping, thereby increasing the water level in the detection water tank and making the water level higher than the pipeline, and thereby facilitating the detection of whether the pipeline leaks.

[0017] The specific embodiments of the application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] In the drawings: Figure 1 It is a pipeline gas tightness detection system structure schematic view of the present application; Figure 2 It is a first end sealing assembly structure schematic view of the present application; Figure 3 It is a first end sealing assembly sectional structure schematic view of the present application; Figure 4 It is a second end sealing assembly structure schematic view of the present application; Figure 5 It is a second end sealing assembly sectional structure schematic view of the present application; Figure 6 It is a water level control assembly structure schematic view of the present application.

[0019] In the drawings: 100, detection water tank; 101, support leg; 200, first end sealing assembly; 201, rotating disc; 202, rotating handle; 203, first rubber part; 204, fixed end cover; 205, gas filling pipe; 206, exhaust valve; 207, air inlet valve; 208, first fixed cover; 209, electromagnetic three-way valve; 300, second end sealing assembly; 301, electric telescopic rod; 302, second fixed cover; 303, second rubber part; 304, third rubber part; 305, connecting rod; 306, piston plate; 307, reset spring; 308, piston cylinder; 400, water storage tank; 401, water filling port; 402, micro water pump; 403, electromagnetic valve; 404, backflow pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0021] Referring to Figure 1As shown, it is a pipeline gas tightness detection system structure schematic diagram in the embodiment, the pipeline gas tightness detection system in the embodiment, including detection water tank 100, the bottom four corners of detection water tank 100 are all fixedly connected with support leg 101, the inside one side of detection water tank 100 is provided with first end sealing assembly 200, the other side is provided with second end sealing assembly 300, second end sealing assembly 300 can move laterally to the direction of first end sealing assembly 200, detection pipeline is clamped between first end sealing assembly 200 and second end sealing assembly 300, the inside of detection water tank 100 is filled with water, in the embodiment, the pipeline is placed between first end sealing assembly 200 and second end sealing assembly 300, and the pipeline is clamped by the lateral movement of second end sealing assembly 300 to first end sealing assembly 200, after filling high pressure into the pipeline, water is added to the inside of detection water tank 100, whether the pipeline leaks is judged by whether water bubbles, Referring to Figure 2 And Figure 3 As shown, it is a first end sealing assembly structure schematic diagram in the embodiment, first end sealing assembly 200 includes first fixed cover 208, the outer wall of first fixed cover 208 is fixedly connected with air inlet pipe, air inlet pipe passes through detection water tank 100 and is detachably connected with air inlet valve 207, the end of first end sealing assembly 200 close to second end sealing assembly 300 is provided with first rubber part 203, the inside of first end sealing assembly 200 is fixedly connected with gas filling pipe 205 in communication with air inlet pipe, the outer wall of gas filling pipe 205 close to the end is fixedly connected with fixed end cover 204, fixed end cover 204 is fixedly connected with first rubber part 203, the outer wall of gas filling pipe 205 is detachably connected with the first connecting end and the second connecting end of electromagnetic three-way valve 209, the outer wall of first end sealing assembly 200 is detachably connected with exhaust valve 206, air inlet valve 207 is connected with the gas outlet end of external air compressor, in the embodiment, high-pressure gas is injected into the inside of the pipeline by opening air inlet valve 207 so that high-pressure gas passes through gas filling pipe 205, with the increase of the pressure in the pipeline, by opening electromagnetic three-way valve 209, gas enters the inside of first end sealing assembly 200, and first rubber part 203 is blown outward, so that the pressure in first rubber part 203 is higher than the pressure in the pipeline, and then first rubber part 203 can always press the end of the pipeline, and then the sealing property of one end of the pipeline is better.

[0022] Referring to Figure 4As shown, it is the second end sealing assembly structure schematic diagram in the embodiment, the second end sealing assembly 300 includes the second fixed cover 302, the second rubber part 303 and the third rubber part 304, the inside of the second fixed cover 302 seals certain gas, the third rubber part 304 is extruded when the pipeline is punched, so that the second rubber part 303 bulges outward, in the embodiment, the second rubber part 303 can be more fitted to the end of the pipeline by bulging outward, and the first end sealing assembly 200 is matched to make the sealing of the two ends of the pipeline more high, to avoid the end of the pipeline from leaking when detecting the pipeline, so that the pipeline body cannot be detected whether it leaks.

[0023] Referring to Figure 5 As shown, it is the second end sealing assembly structure schematic diagram in the embodiment, the inside of the third rubber part 304 is fixedly connected with the piston cylinder 308, there is a gap between the piston cylinder 308 and the inside of the second fixed cover 302, the inner wall of the third rubber part 304 is fixedly connected with the connecting rod 305, the end of the connecting rod 305 is fixedly connected with the piston plate 306, the piston plate 306 and the second fixed cover 302 are provided with the reset spring 307, in the embodiment, when the third rubber part 304 is extruded by the pressure in the pipeline, the connecting rod 305 pushes the piston plate 306 to move horizontally and compresses the reset spring 307, the horizontal movement of the piston plate 306 will push the air to the outside of the piston cylinder 308 and make the second rubber part 303 bulge outward, so that the second rubber part 303 can be more fitted to the end of the pipeline, and the sealing is better, after the detection is completed, the gas in the first rubber part 203 can be discharged outward by opening the exhaust valve 206, if the detected pipeline is too much, the high pressure in the first rubber part 203 can also be maintained until the pipeline detection is completed.

[0024] In order to make the second end sealing assembly 300 move horizontally to the direction of the first end sealing assembly 200, the specific implementation can adopt the embodiment as shown in Figure 1 and Figure 4 The second end sealing assembly 300 further includes the electric telescopic rod 301, the outer wall of the detection water tank 100 is detachably connected with the electric telescopic rod 301, the telescopic end of the electric telescopic rod 301 is rotatably connected with the outer wall of the second fixed cover 302, in the embodiment, by the extension and shortening of the electric telescopic rod 301, the distance between the first end sealing assembly 200 and the second end sealing assembly 300 can be adjusted according to the length of the pipeline, and a continuous holding force can also be applied, so that the sealing is better.

[0025] In order to be able to judge the position of the leakage point during detection, the specific implementation can adopt the embodiment as shown in Figure 2 and Figure 3The outer wall of the air inlet pipe is detachably connected with a rotating disc 201 in the illustrated embodiment, and the outer wall of the rotating disc 201 is fixedly connected with a plurality of rotating handles 202. In this embodiment, after the pipeline is clamped by the first end sealing assembly 200 and the second end sealing assembly 300, the rotating handles 202 are held to rotate the rotating disc 201, so that the pipeline can be rotated, and the position of the air bubbles can be observed when the pipeline leaks air bubbles, which is more convenient for positioning the air bubbles.

[0026] With reference to Figure 6 As shown, it is a structure diagram of the water level control assembly in this embodiment. The outer wall of one side of the detection water tank 100 is detachably connected with a water storage tank 400, and the bottom of the water storage tank 400 is attached to the ground. The bottom of the detection water tank 100 is detachably connected with a solenoid valve 403, and the solenoid valve 403 is detachably connected with a backflow pipe 404. The backflow pipe 404 is connected and communicated with the outer wall of the water storage tank 400. The upper end of the water storage tank 400 is provided with a water inlet 401, and the upper end of the water storage tank 400 is detachably connected with a micro water pump 402. The liquid inlet end of the micro water pump 402 is inserted into the inside of the water storage tank 400 and extends to the bottom. The liquid outlet end of the micro water pump 402 is inserted into the inside of the detection water tank 100. In this embodiment, when the pipeline to be detected is clamped, the solenoid valve 403 is opened to make the water in the inside of the detection water tank 100 enter the inside of the water storage tank 400 through the backflow pipe 404, so that the water level in the inside of the detection water tank 100 can be reduced when the pipeline is clamped. After clamping is completed, the water in the inside of the water storage tank 400 is pumped out by the micro water pump 402 and enters the inside of the detection water tank 100, so that the water level in the inside of the detection water tank 100 can be increased, so that the water level is higher than the pipeline, and the pipeline can be conveniently detected whether it leaks.

[0027] Working principle: before detection, the pipeline to be detected is placed between the first end sealing assembly 200 and the second end sealing assembly 300 in the inside of the detection water tank 100, and the electric telescopic rod 301 on the second end sealing assembly 300 is started. The distance between the two sealing assemblies is adjusted by the telescopic rod 301 until the pipeline is stably clamped.

[0028] For the first end sealing assembly 200, the air charging pipe 205 in the inside is communicated with the external air compressor through the air inlet valve 207. After the air inlet valve 207 is opened, high-pressure gas is injected into the inside of the pipeline through the air charging pipe 205. At the same time, the solenoid three-way valve 209 is opened, so that part of the high-pressure gas enters the inside of the first end sealing assembly 200, pushes the first rubber part 203 to adhere to the inner wall of the pipeline end, and uses the gas pressure to ensure that the first rubber part 203 is in close contact with the pipeline end, so as to realize the sealing of one end of the pipeline.

[0029] For the second end sealing assembly 300, the high-pressure gas in the pipeline will squeeze the third rubber part 304 during the charging process, and the third rubber part 304 pushes the piston plate 306 to move laterally and compress the reset spring 307 through the connecting rod 305; when the piston plate 306 moves, it will squeeze the air inside the second fixed cover 302, and the squeezed air will push the second rubber part 303 to bulge outward, so that the second rubber part 303 tightly fits the inner wall of the other end of the pipeline, and the double sealing of the two ends of the pipeline is completed in cooperation with the first end sealing assembly 200, avoiding the influence of end water leakage on the judgment of pipeline body leakage during detection.

[0030] Before the pipeline clamping and sealing is completed, the electromagnetic valve 403 at the bottom of the detection water tank 100 is opened, and the water in the water tank flows into the water storage tank 400 on one side through the return pipe 404, thereby lowering the water level in the water tank and reserving operation space for pipeline installation; after the pipeline clamping and sealing is in place, the micro water pump 402 on the water storage tank 400 is started, which pumps out the water in the water storage tank 400 and delivers it to the detection water tank 100, until the water level in the water tank is higher than the pipeline to be detected, thereby providing a water environment for subsequent leakage judgment; if the water amount in the water storage tank 400 is insufficient, the water amount can be supplemented through the water inlet 401 at the upper end.

[0031] After the pipeline is immersed, high-pressure gas is continuously injected into the pipeline through the air inlet valve 207, so that the internal pressure of the pipeline is maintained at a set detection pressure; if it is necessary to observe whether there is a leakage point on the pipeline, the rotating handle 202 on the air inlet pipe of the first end sealing assembly 200 is held, the rotating disc 201 is rotated, and the rotating disc 201 drives the pipeline to rotate synchronously, thereby facilitating the operator to observe the surface of the pipeline comprehensively.

[0032] If the pipeline has a leakage, the high-pressure gas in the pipeline will escape from the leakage point and form visible bubbles in the water, and the leakage point can be located by observing the position where the bubbles are generated; if the pipeline has no leakage, no bubbles are generated in the water; after the detection is completed, the air outlet valve 206 on the first end sealing assembly 200 is opened to discharge the high-pressure gas in the first rubber part 203; if it is necessary to continuously detect multiple pipelines, the high-pressure state in the first rubber part 203 can be maintained, and the next pipeline to be detected can be directly replaced to repeat the above process.

[0033] The embodiment also discloses a pipeline air tightness detection method, which uses the detection system and comprises the following steps: S1: placing the pipeline in the inside of the detection water tank 100; S2: fitting one end of the pipeline to the first end sealing assembly 200 and fixing the pipeline; S3: adding water to the inside of the detection water tank 100 so that the water level is higher than the pipeline; S4: injecting high-pressure gas into the pipeline; S5: observing whether there are bubbles to determine whether there is leakage.

[0034] That which is not described in detail in the specification is well known to those skilled in the art.

[0035] The above descriptions are only the preferred embodiments of the present application and are not intended in any way to limit the present application. Although the present application has been described in terms of preferred embodiments, it is not intended to limit the present application.

Claims

1. A pipeline gas tightness detection system comprising a detection tank (100), characterized in that, The first end sealing assembly (200) is arranged on the inner side of the detection water tank (100), and can inject high-pressure gas into the pipeline and seal the end of the pipeline.

2. A system for detecting leaks in a pipe according to claim 1, wherein, The first end sealing assembly (200) comprises a first fixed cover (208), an air inlet pipe is fixedly connected to the outer wall of the first fixed cover (208), the air inlet pipe penetrates through the detection water tank (100) and is detachably connected with an air inlet valve (207), the first end sealing assembly (200) is provided with a first rubber part (203) at the end close to the second end sealing assembly (300), a gas filling pipe (205) in communication with the air inlet pipe is fixedly connected to the inside of the first end sealing assembly (200), a fixed end cover (204) is fixedly connected to the outer wall of the gas filling pipe (205) close to the end, the fixed end cover (204) is fixedly connected with the first rubber part (203), the first connecting end and the second connecting end of an electromagnetic three-way valve (209) are detachably connected to the outer wall of the gas filling pipe (205), and an exhaust valve (206) is detachably connected to the outer wall of the first end sealing assembly (200), the air inlet valve (207) is connected with the gas outlet end of an external air compressor, opening the air inlet valve (207) makes the high-pressure gas injected into the inside of the pipeline through the gas filling pipe (205), with the increase of the pressure in the pipeline, the electromagnetic three-way valve (209) is opened to make the gas enter the inside of the first end sealing assembly (200) to blow the first rubber part (203) outward, so that the pressure in the first rubber part (203) is higher than the pressure in the pipeline.

3. A system for detecting leaks in a pipe according to claim 2, wherein, The outer wall of the air inlet pipe is detachably connected with a rotating disc (201), a plurality of rotating handles (202) are fixedly connected to the outer wall of the rotating disc (201), and rotating the rotating disc (201) makes the pipeline rotate.

4. The system for detecting leaks in a pipe of claim 1, wherein, The second end sealing assembly (300) can move transversely to the direction of the first end sealing assembly (200) to clamp the pipeline between the second end sealing assembly (300) and the first end sealing assembly (200).

5. A system for detecting leaks in a pipe according to claim 4, wherein, The second end sealing assembly (300) comprises a second fixed cover (302), a second rubber part (303) and a third rubber part (304), the inside of the second fixed cover (302) is sealed with a certain gas, and the third rubber part (304) is extruded when the pipeline is punched to make the second rubber part (303) bulge outward.

6. A system for detecting leaks in a pipe according to claim 5, wherein, The inside of the third rubber part (304) is fixedly connected with a piston cylinder (308), and a gap exists between the piston cylinder (308) and the inside of the second fixed cover (302). The inner wall of the third rubber part (304) is fixedly connected with a connecting rod (305), and the end of the connecting rod (305) is fixedly connected with a piston plate (306). The piston plate (306) is provided with a reset spring (307) between the second fixed cover (302). When the third rubber part (304) is extruded by the pressure in the pipeline, the connecting rod (305) pushes the piston plate (306) to move transversely and compresses the reset spring (307). The transverse movement of the piston plate (306) pushes the air to the outside of the piston cylinder (308) and makes the second rubber part (303) bulge outward.

7. A system for detecting leaks in a pipe according to any one of claims 4-6, wherein The second end sealing assembly (300) further comprises an electric telescopic rod (301), and the outer wall of the detection water tank (100) is detachably connected with the electric telescopic rod (301). The telescopic end of the electric telescopic rod (301) is rotatably connected with the outer wall of the second fixed cover (302).

8. The system for detecting leaks in a pipe of claim 1, wherein, Further comprising a water level adjusting assembly, the water temperature adjusting assembly is installed outside the detection water tank (100), and the water temperature adjusting assembly lowers the water level in the detection water tank (100) when the pipeline is installed, and the water temperature adjusting assembly raises the water level in the detection water tank (100) when detection is performed.

9. A system for detecting leaks in a pipe according to claim 8, wherein, The water temperature adjusting assembly comprises a water storage tank (400), and one side of the outer wall of the detection water tank (100) is detachably connected with the water storage tank (400). The bottom of the water storage tank (400) is attached to the ground. The bottom of the detection water tank (100) is detachably connected with a solenoid valve (403). The solenoid valve (403) is detachably connected with a return pipe (404). The return pipe (404) is connected and communicated with the outer wall of the water storage tank (400). One side of the upper end of the water storage tank (400) is provided with a water inlet (401). The upper end of the water storage tank (400) is detachably connected with a micro water pump (402). The liquid inlet end of the micro water pump (402) is inserted into the inside of the water storage tank (400) and extends to the bottom. The liquid outlet end of the micro water pump (402) is inserted into the inside of the detection water tank (100).

10. A method for detecting a gas tightness of a pipe using the pipe gas tightness detection system according to claim 1, characterized by, The method mainly comprises the following steps: S1: placing the pipeline in the inside of the detection water tank (100); S2: attaching one end of the pipeline to the first end sealing assembly (200) and fixing the pipeline; S3: adding water to the inside of the detection water tank (100) so that the water level is higher than the pipeline; S4: injecting high-pressure gas into the pipeline; S5: observing whether there are bubbles to determine whether there is leakage.

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