Leakage detection device for water supply network and use method of leakage detection device

Abstract

The invention discloses a leakage detection device for a water supply pipe network and a use method thereof, the leakage detection device comprises a water supply pipeline, the right end of the top of the water supply pipeline is fixedly connected with a putting pipeline, the top of the putting pipeline is in threaded connection with a second sealing plug cover, and the upper end of the inner cavity of the putting pipeline is in threaded connection with a second threaded waterproof cap. According to the invention, the steel wire guide rope is additionally arranged in the section of the water supply pipeline, which needs to be subjected to water leakage detection, so that a guide path can be provided for the movement of the detection instrument in the detection process, and the detection instrument can perform leakage detection on the interior of the water supply pipeline along a preset route; the detection instrument is effectively prevented from entering the branch pipeline in the detection interval of the water supply pipeline in the moving process, so that a valve in the branch pipeline section does not need to be closed in the detection process of personnel, and the normal operation of domestic water of surrounding users in the detection process is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of water supply pipe network leakage detection, and in particular to a water supply pipe network leakage detection device and a use method thereof. Background Art

[0002] Urban water supply pipelines are the "lifeline" to ensure the normal operation of the city. In recent years, with the continuous acceleration of my country's urbanization process, the length of water supply pipelines has continued to increase. At the same time, due to pipeline aging, insufficient maintenance, unreasonable adjustment of water supply, improper design and construction, etc., the leakage problem of water supply pipelines has become more and more prominent. In order to ensure the normal operation of urban water supply, water supply companies often regularly organize personnel to conduct corresponding leakage detection on the pipelines.

[0003] At present, the industry has adopted a variety of technical means to detect pipeline leakage, aiming to quickly and accurately locate the leakage point so as to repair it in time and reduce losses. The following are several main leakage detection methods and their characteristics:

[0004] Endoscopic robot: Through integrated high-resolution camera, lighting, transmission and control functions, it can detect leakage in water supply pipe networks. The working principle of the endoscopic robot is to send a probe with a camera into the pipe through the pipe entrance or inspection well, capture high-definition images of the inner wall of the pipe in real time, and wirelessly transmit these images to the receiving equipment on the ground. The operator can observe the internal conditions of the pipe on the display screen, including the water flow status, pipe wall condition and any abnormal phenomena such as cracks, holes, etc.

[0005] Smart ball: The core of the smart ball is composed of a waterproof aluminum core with a diameter of about 60mm. The core contains sensors, measuring instruments, batteries and other equipment. The smart ball detection system is mainly composed of basic equipment such as host computers, smart ball detection devices, sound receiving devices and GPS receivers. When the smart ball detects in the pipeline, it uses the pressure of the transport fluid in the pipeline to move forward. When detecting leaks in the pipeline network, it is placed inside a hollow, compressible foam ball. The foam ball serves as an outer shell to provide buoyancy for the smart ball to move in the pipeline network. It is then put into a large-diameter water supply pipeline. During this period, various sound signals in the pipeline are recorded. During the movement of the pipeline, it benefits from its smaller volume and is very useful for various It is applicable to accessories such as gate valves, butterfly valves, and reducer pipes, and is not affected by elbows and variable cross-sections. It can achieve 12 hours of continuous monitoring of pipelines during operation. According to the existing large-diameter pipelines at a flow rate of 0.6m / s-1m / s, it can detect pipelines 20-40km away in one operation. The external sound receiving device is installed on the surface of the pipeline along the line or on valves, fire hydrants and other ancillary facilities at a certain distance. It is used to receive the sound signal emitted by the smart ball during the movement of the pipeline. After the smart ball detects, the smart ball is recovered through a special device. Finally, by comparing and analyzing the emitted and received sound data, the leakage position and leakage amount of the pipeline can be determined.

[0006] In the process of using endoscopic robots, smart balls and other detection instruments to inspect the water supply network, it is usually necessary to place them in the straight pipe section from the upstream, and use the water flow as the forward power to detect pipeline leakage along the way. In order to prevent endoscopic robots, smart balls and other detection instruments from flowing into the branch pipe section and making them difficult to recover, the valves of all branch pipe sections within the inspection interval are often closed during the inspection process. This will result in the surrounding users being unable to use domestic water normally during the inspection, which will have a great impact on the lives of surrounding users. Summary of the invention

[0007] The purpose of the present invention is to provide a leakage detection device for a water supply network and a method of using the same, which has the advantage of ensuring that the detection instrument moves along a predetermined route during leakage detection of the water supply network, ensuring that the detection work can be carried out normally, and effectively avoiding the need to close all branch pipe section valves within the detection interval of the water supply network during the detection process, thereby ensuring that residents' domestic water use can be carried out normally during the detection process.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a leakage detection device for a water supply network, comprising a water supply pipe, the right end of the top of the water supply pipe is fixedly connected to a delivery pipe, the top of the delivery pipe is threadedly connected to a second sealing plugging cover, the upper end of the inner cavity of the delivery pipe is threadedly connected to a second threaded waterproof cap, the top of the second threaded waterproof cap is fixedly connected to a second rotating block, a second vertical pipe is movably connected between the middle end of the second threaded waterproof cap and the middle end of the second rotating block, the inner cavity of the second vertical pipe is movably connected to a wire guide rope, the upper end of the second vertical pipe is fixedly connected to a second pull ring, the left end of the top of the water supply pipe is fixedly connected to a recovery pipe, the top of the recovery pipe is threadedly connected to a first sealing plugging cover, the upper end of the inner cavity of the recovery pipe is threadedly connected to a first threaded waterproof cap, and the top of the first threaded waterproof cap is fixedly connected to a first rotating block.

[0009] As a preferred solution, a power ball is fixedly installed on the left side of the wire guide rope, a first vertical pipe is movably connected between the middle end of the first threaded waterproof cap and the middle end of the first rotating block, a recovery wire is movably connected to the inner cavity of the first vertical pipe, and an elastic recovery net basket is sleeved on the lower end of the recovery wire.

[0010] As a preferred embodiment, a recovery bend pipe is movably connected between the middle end of the first threaded waterproof cap and the middle end of the first rotating block, the left end of the wire guide rope is movably connected to the inner cavity of the recovery bend pipe, the lower end of the outer surface of the recovery bend pipe is fixedly connected to a magnetic block, the right end of the wire guide rope is movably connected to a connecting guide ring, and a detection instrument is fixedly installed on the upper end of the connecting guide ring.

[0011] As a preferred solution, a first pull ring is fixedly connected to the upper end of the first vertical pipe, and a water guide hole is opened on the surface of the elastic recovery net basket.

[0012] As a preferred solution, a third pull ring is fixedly connected to the upper end of the recovery elbow.

[0013] As a preferred solution, the inner lumens of the delivery pipe and the recovery pipe are both coated with a ceramic-based composite coating.

[0014] As a preferred solution, a first rubber sealing pad is fixedly connected around the top of the inner cavity of the first sealing plugging cover, and a second rubber sealing pad is fixedly connected around the top of the inner cavity of the second sealing plugging cover.

[0015] As a preferred solution, a first fixed pressure plate is fixedly installed on the top of the inner cavity of the first sealing plugging cover by means of bolts, and a second fixed pressure plate is fixedly installed on the top of the inner cavity of the second sealing plugging cover by means of bolts.

[0016] As a preferred solution, a first gate valve is fixedly installed at the lower end of the recovery pipeline, and a second gate valve is fixedly installed at the lower end of the delivery pipeline.

[0017] As a preferred solution, a method for using a leakage detection device for a water supply network comprises the following steps:

[0018] A. First, by adding a delivery pipe and a recovery pipe on the top of the water supply pipe, the area inside the water supply pipe that needs to be tested for water leakage can be located between the delivery pipe and the recovery pipe;

[0019] B. Then, the power ball and the wire guide rope, the recovery wire and the elastic recovery net basket are respectively inserted into the water supply pipe along the inner cavity of the second vertical pipe and the first vertical pipe. Then, in the process of the water body in the water supply pipe being transported from right to left, the power ball can be driven to gradually move to the left side. Under the action of the movement of the power ball, the wire guide rope can be gradually pulled to move. At the same time, under the action of the elastic recovery net basket being stretched, it can contact the inner wall of the water supply pipe and effectively intercept the power ball inside the water supply pipe, so that the power ball can enter the elastic recovery net basket under the action of movement.

[0020] C. At the same time, when the personnel pulls the recovery wire upward, the mouth of the elastic recovery basket can be tightened, thereby effectively preventing the power ball from falling off from the inside of the elastic recovery basket. Then, the first rotating block, the first threaded waterproof cap and the first vertical pipe are disassembled from the inner cavity of the recovery pipe using tools, and the power ball can be taken out by pulling the recovery wire and the elastic recovery basket upward, and then the power ball and the wire guide are disassembled;

[0021] D. Subsequently, after replacing the first vertical pipe with the recovery elbow pipe, the left end of the wire guide rope is inserted into the replaced recovery elbow pipe, and at the same time, the second rotating block, the second threaded waterproof cap and the second vertical pipe are removed from the inside of the delivery pipe by using tools, and the connecting guide ring connected to the surface of the detection instrument is sleeved on the right end of the wire guide rope, and then the first rotating block, the first threaded waterproof cap, the recovery elbow pipe, the second rotating block, the second threaded waterproof cap and the second vertical pipe are respectively installed into the recovery pipe and the delivery pipe by using tools again, so that the detection instrument and the connecting guide ring can be extended into the water supply pipe, and in the process of the water body in the water supply pipe being transported from right to left, the detection instrument and the connecting guide ring can be driven to gradually move to the left along the surface of the wire guide rope, so that the detection instrument can perform leakage detection on the inside of the water supply pipe under the action of movement;

[0022] E. At the same time, under the action of the recovery elbow, the detection instrument and the connecting guide ring can be effectively intercepted inside the water supply pipe, and under the action of the magnetic block, the connecting guide ring can be firmly adsorbed on the lower end of the recovery elbow, and in the process of subsequent personnel using tools to disassemble the first rotating block, the first threaded waterproof cap and the recovery elbow, the connecting guide ring and the detection instrument can be hooked out from the inside of the water supply pipe, thereby achieving the effect of effectively recovering the detection instrument.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention can provide a guide path for the movement of the detection instrument during the detection process by adding a steel wire guide rope in the section where the water supply pipeline needs to be tested for water leakage, so that the detection instrument can perform leakage detection on the inside of the water supply pipeline along a predetermined route, and effectively prevent the detection instrument from entering the branch pipeline in the detection section of the water supply pipeline during the movement, so that personnel do not need to close the valve in the branch pipe section during the detection process, thereby ensuring that the domestic water supply of surrounding users can be normal during the detection process, and at the same time, it is convenient for personnel to recycle the detection instrument after the detection is completed, which brings great convenience to the operation and use of personnel.

[0025] 2. The present invention facilitates personnel to lift and pull the first vertical pipe through the provision of the first pull ring, and can effectively reduce the water thrust exerted on the elastic recovery basket inside the water supply pipe through the provision of the water guide hole. The provision of the third pull ring facilitates personnel to lift and pull the recovery elbow pipe. The provision of the ceramic-based composite coating forms good corrosion protection inside the delivery pipe and the recovery pipe, respectively, and effectively improves the corrosion resistance inside the delivery pipe and the recovery pipe. The provision of the first rubber sealing pad and the second rubber sealing pad effectively improves the sealing between the first sealing plug cover and the recovery pipe, and the second sealing plug cover and the delivery pipe. The provision of the first fixed pressure plate and the second fixed pressure plate facilitates the compression and fixation of the end of the wire guide rope to the first sealing plug cover and the second sealing plug cover. The provision of the first gate valve and the second gate valve facilitates personnel to intercept the inside of the recovery pipe and the delivery pipe, and effectively reduces the amount of water leaked from the water supply pipe during personnel operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a stereogram of the present invention;

[0027] Figure 2 A schematic diagram of the structure of the steel wire guide rope inside the water supply pipeline of the present invention;

[0028] Figure 3 This is a schematic diagram of the first vertical pipe structure of the present invention;

[0029] Figure 4 It is a schematic diagram of the detection instrument recovery structure inside the water supply pipeline of the present invention;

[0030] Figure 5 This is a schematic diagram of the recovery elbow structure of the present invention.

[0031] In the figure: 1. water supply pipeline; 2. first gate valve; 3. recovery pipeline; 4. first sealing plugging cover; 5. second sealing plugging cover; 6. delivery pipeline; 7. second gate valve; 8. first threaded waterproof cap; 9. first vertical pipe; 10. elastic recovery basket; 11. power ball; 12. wire guide rope; 13. second vertical pipe; 14. second threaded waterproof cap; 15. first pull ring; 16. first rotating block; 17. recovery wire; 18. second rotating block; 19. third pull ring; 20. second pull ring; 21. recovery elbow; 22. detection instrument; 23. connecting guide ring; 24. magnetic block. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-5 A leakage detection device for a water supply network comprises a water supply pipe 1, a delivery pipe 6 is fixedly connected to the right end of the top of the water supply pipe 1, a second sealing plugging cover 5 is threadedly connected to the top of the delivery pipe 6, a second threaded waterproof cap 14 is threadedly connected to the upper end of the inner cavity of the delivery pipe 6, a second rotating block 18 is fixedly connected to the top of the second threaded waterproof cap 14, a second vertical pipe 13 is movably connected between the middle end of the second threaded waterproof cap 14 and the middle end of the second rotating block 18, a wire guide rope 12 is movably connected to the inner cavity of the second vertical pipe 13, a second pull ring 20 is fixedly connected to the upper end of the second vertical pipe 13, a recovery pipe 3 is fixedly connected to the left end of the top of the water supply pipe 1, a first sealing plugging cover 4 is threadedly connected to the top of the recovery pipe 3, a first threaded waterproof cap 8 is threadedly connected to the upper end of the inner cavity of the recovery pipe 3, and a first rotating block 16 is fixedly connected to the top of the first threaded waterproof cap 8.

[0034] Through the above technical scheme, by adding a wire guide rope 12 in the section of the water supply pipe 1 where water leakage detection is required, a guide path can be provided for the movement of the detection instrument 22 during the detection process, so that the detection instrument 22 can perform leakage detection on the inside of the water supply pipe 1 along a predetermined route, and effectively prevent the detection instrument 22 from entering the branch pipe within the detection section of the water supply pipe 1 during the movement, so that personnel do not need to close the valve in the branch pipe section during the detection process, thereby ensuring that the domestic water supply of surrounding users can be normal during the detection process, and at the same time, it is convenient for personnel to recycle the detection instrument 22 after the detection is completed, which brings great convenience to the operation and use of personnel.

[0035] A power ball 11 is fixedly installed on the left side of the wire guide rope 12, a first vertical pipe 9 is movably connected between the middle end of the first threaded waterproof cap 8 and the middle end of the first rotating block 16, a recovery wire 17 is movably connected to the inner cavity of the first vertical pipe 9, and an elastic recovery net basket 10 is sleeved on the lower end of the recovery wire 17.

[0036] A recovery bend pipe 21 is movably connected between the middle end of the first threaded waterproof cap 8 and the middle end of the first rotating block 16, the left end of the wire guide rope 12 is movably connected to the inner cavity of the recovery bend pipe 21, the lower end of the outer surface of the recovery bend pipe 21 is fixedly connected to a magnetic block 24, the right end of the wire guide rope 12 is movably connected to a connecting guide ring 23, and a detection instrument 22 is fixedly installed on the upper end of the connecting guide ring 23.

[0037] A first pull ring 15 is fixedly connected to the upper end of the first vertical pipe 9 , and a water guide hole is opened on the surface of the elastic recovery basket 10 .

[0038] Through the above technical solution, by setting the first pull ring 15, it is convenient for personnel to lift and pull the first vertical pipe 9, and by setting the water guide hole, the water thrust exerted on the elastic recovery basket 10 inside the water supply pipe 1 can be effectively reduced.

[0039] The upper end of the recovery elbow 21 is fixedly connected with a third pull ring 19 .

[0040] Through the above technical solution, by providing the third pull ring 19 , it is convenient for personnel to lift and pull the recovery elbow 21 .

[0041] The inner cavity of the delivery pipe 6 and the inner cavity of the recovery pipe 3 are both coated with a ceramic-based composite coating.

[0042] Through the above technical solution, by setting the ceramic-based composite coating, good anti-corrosion protection is formed inside the delivery pipeline 6 and the recovery pipeline 3, respectively, effectively improving the anti-corrosion performance inside the delivery pipeline 6 and the recovery pipeline 3.

[0043] A first rubber sealing pad is fixedly connected around the top of the inner cavity of the first sealing plugging cover 4 , and a second rubber sealing pad is fixedly connected around the top of the inner cavity of the second sealing plugging cover 5 .

[0044] Through the above technical solution, by setting the first rubber sealing pad and the second rubber sealing pad, the sealing between the first sealing plugging cover 4 and the recovery pipe 3, and the sealing between the second sealing plugging cover 5 and the delivery pipe 6 is effectively improved.

[0045] A first fixed pressure plate is fixedly installed on the top of the inner cavity of the first sealing plugging cover 4 by means of bolts, and a second fixed pressure plate is fixedly installed on the top of the inner cavity of the second sealing plugging cover 5 by means of bolts.

[0046] Through the above technical solution, by setting the first fixed pressure plate and the second fixed pressure plate, it is convenient to press and fix the end of the wire guide rope 12 with the first sealing plug cover 4 and the second sealing plug cover 5.

[0047] A first gate valve 2 is fixedly installed at the lower end of the recovery pipeline 3 , and a second gate valve 7 is fixedly installed at the lower end of the delivery pipeline 6 .

[0048] Through the above technical solution, by setting the first gate valve 2 and the second gate valve 7, it is convenient for personnel to intercept the inside of the recovery pipe 3 and the delivery pipe 6, and effectively reduce the amount of water leaked from the inside of the water supply pipe 1 during the operation of personnel.

[0049] A method for using a leakage detection device for a water supply network, the method comprising the following steps:

[0050] A. First, by adding a delivery pipe 6 and a recovery pipe 3 on the top of the water supply pipe 1, the area inside the water supply pipe 1 where water leakage detection is required can be located between the delivery pipe 6 and the recovery pipe 3;

[0051] B. Then, the power ball 11, the steel wire guide 12, the recovery steel wire 17 and the elastic recovery net basket 10 are respectively inserted into the water supply pipe 1 along the inner cavity of the second vertical pipe 13 and the first vertical pipe 9. Then, in the process of the water body in the water supply pipe 1 being transported from right to left, the power ball 11 can be driven to gradually move to the left side. Under the action of the movement of the power ball 11, the steel wire guide 12 can be gradually pulled to move. At the same time, under the action of the elastic recovery net basket 10 being stretched, it can contact the inner wall of the water supply pipe 1 and can effectively intercept the power ball 11 in the water supply pipe 1, so that the power ball 11 can enter the elastic recovery net basket 10 under the action of movement;

[0052] C. At the same time, when the personnel pulls the recovery wire 17 upward, the mouth of the elastic recovery basket 10 can be tightened, thereby effectively preventing the power ball 11 from falling off from the inside of the elastic recovery basket 10, and then the first rotating block 16, the first threaded waterproof cap 8 and the first vertical pipe 9 are disassembled from the inner cavity of the recovery pipe 3 using tools, and the power ball 11 can be taken out by pulling the recovery wire 17 and the elastic recovery basket 10 upward, and then the power ball 11 and the wire guide 12 are disassembled;

[0053] D. Subsequently, after replacing the first vertical pipe 9 with the recovery elbow 21, the left end of the wire guide rope 12 is inserted into the replaced recovery elbow 21, and the second rotating block 18, the second threaded waterproof cap 14 and the second vertical pipe 13 are removed from the inside of the delivery pipe 6 by using a tool, and the connecting guide ring 23 connected to the surface of the detection instrument 22 is sleeved on the right end of the wire guide rope 12, and then the first rotating block 16, the first threaded waterproof cap 8, the recovery elbow 21, the second rotating block 18, the second threaded waterproof cap 14 and the second vertical pipe 13 are respectively installed to the inside of the recovery pipe 3 and the delivery pipe 6 by using a tool again, so that the detection instrument 22 and the connecting guide ring 23 can be extended into the inside of the water supply pipe 1, and in the process of the water body in the water supply pipe 1 being transported from right to left, the detection instrument 22 and the connecting guide ring 23 can be driven to gradually move to the left along the surface of the wire guide rope 12, so that the detection instrument 22 can detect leakage inside the water supply pipe 1 under the action of movement;

[0054] E. At the same time, under the action of the recovery elbow 21, the detection instrument 22 and the connecting guide ring 23 can be effectively intercepted inside the water supply pipe 1, and under the action of the magnetic block 24, the connecting guide ring 23 can be firmly adsorbed on the lower end of the recovery elbow 21, and in the process of subsequent personnel using tools to disassemble the first rotating block 16, the first threaded waterproof cap 8 and the recovery elbow 21, the connecting guide ring 23 and the detection instrument 22 can be hooked out from the inside of the water supply pipe 1, thereby achieving the effect of effectively recovering the detection instrument 22.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A leakage detection device for a water supply network, comprising a water supply pipeline (1), characterized in that: The right end of the top of the water supply pipe (1) is fixedly connected to a delivery pipe (6), the top of the delivery pipe (6) is threadedly connected to a second sealing plugging cover (5), the upper end of the inner cavity of the delivery pipe (6) is threadedly connected to a second threaded waterproof cap (14), the top of the second threaded waterproof cap (14) is fixedly connected to a second rotating block (18), a second vertical pipe (13) is movably connected between the middle end of the second threaded waterproof cap (14) and the middle end of the second rotating block (18), the inner cavity of the second vertical pipe (13) is movably connected to a steel wire guide rope (12), the upper end of the second vertical pipe (13) is fixedly connected to a second pull ring (20), the left end of the top of the water supply pipe (1) is fixedly connected to a recovery pipe (3), the top of the recovery pipe (3) is threadedly connected to a first sealing plugging cover (4), the upper end of the inner cavity of the recovery pipe (3) is threadedly connected to a first threaded waterproof cap (8), and the top of the first threaded waterproof cap (8) is fixedly connected to a first rotating block (16).

2. A water supply network leakage detection device according to claim 1, characterized in that: A power ball (11) is fixedly installed on the left side of the steel wire guide rope (12); a first vertical pipe (9) is movably connected between the middle end of the first threaded waterproof cap (8) and the middle end of the first rotating block (16); a recovery steel wire (17) is movably connected to the inner cavity of the first vertical pipe (9); and an elastic recovery net basket (10) is sleeved on the lower end of the recovery steel wire (17).

3. A water supply network leakage detection device according to claim 1, characterized in that: A recovery bend pipe (21) is movably connected between the middle end of the first threaded waterproof cap (8) and the middle end of the first rotating block (16); the left end of the steel wire guide rope (12) is movably connected to the inner cavity of the recovery bend pipe (21); the lower end of the outer surface of the recovery bend pipe (21) is fixedly connected to a magnetic block (24); the right end of the steel wire guide rope (12) is movably connected to a connecting guide ring (23); and a detection instrument (22) is fixedly installed on the upper end of the connecting guide ring (23).

4. A water supply network leakage detection device according to claim 2, characterized in that: A first pull ring (15) is fixedly connected to the upper end of the first vertical pipe (9), and a water guide hole is provided on the surface of the elastic recovery net basket (10).

5. A water supply network leakage detection device according to claim 3, characterized in that: The upper end of the recovery elbow (21) is fixedly connected to a third pull ring (19).

6. A water supply network leakage detection device according to claim 1, characterized in that: The inner cavity of the delivery pipe (6) and the inner cavity of the recovery pipe (3) are both coated with a ceramic-based composite coating.

7. A water supply network leakage detection device according to claim 1, characterized in that: A first rubber sealing pad is fixedly connected around the top of the inner cavity of the first sealing plugging cover (4), and a second rubber sealing pad is fixedly connected around the top of the inner cavity of the second sealing plugging cover (5).

8. A water supply network leakage detection device according to claim 1, characterized in that: A first fixed pressure plate is fixedly mounted on the top of the inner cavity of the first sealing plugging cover (4) by means of bolts, and a second fixed pressure plate is fixedly mounted on the top of the inner cavity of the second sealing plugging cover (5) by means of bolts.

9. A water supply network leakage detection device according to claim 1, characterized in that: A first gate valve (2) is fixedly installed at the lower end of the recovery pipeline (3), and a second gate valve (7) is fixedly installed at the lower end of the delivery pipeline (6).

10. A method for using a leakage detection device for a water supply network, characterized in that: The method of use includes the following steps: A. First, by adding a delivery pipe (6) and a recovery pipe (3) on the top of the water supply pipe (1), the area inside the water supply pipe (1) that needs to be detected for water leakage can be located between the delivery pipe (6) and the recovery pipe (3); B. Then, the power ball (11), the steel wire guide rope (12), the recovery steel wire (17) and the elastic recovery net basket (10) are respectively inserted into the water supply pipe (1) along the inner cavity of the second vertical pipe (13) and the first vertical pipe (9). Then, in the process of the water body in the water supply pipe (1) being transported from right to left, the power ball (11) can be driven to gradually move to the left side. Under the action of the movement of the power ball (11), the steel wire guide rope (12) can be gradually pulled to move. At the same time, under the action of the elastic recovery net basket (10) being stretched, it can contact the inner wall of the water supply pipe (1) and can effectively intercept the power ball (11) inside the water supply pipe (1), so that the power ball (11) can enter the elastic recovery net basket (10) under the action of movement; C. At the same time, when the personnel pulls the recovery wire (17) upward, the mouth of the elastic recovery net basket (10) can be tightened, thereby effectively preventing the power ball (11) from falling off from the inside of the elastic recovery net basket (10). Then, the first rotating block (16), the first threaded waterproof cap (8) and the first vertical pipe (9) are removed from the inner cavity of the recovery pipe (3) using a tool, and the power ball (11) is removed by pulling the recovery wire (17) and the elastic recovery net basket (10) upward to move. Then, the power ball (11) and the wire guide rope (12) are disassembled; D. Subsequently, after replacing the first vertical pipe (9) with the recovery elbow (21), the left end of the wire guide rope (12) is inserted into the replaced recovery elbow (21), and the second rotating block (18), the second threaded waterproof cap (14) and the second vertical pipe (13) are removed from the inside of the delivery pipe (6) by using a tool, and the connecting guide ring (23) connected to the surface of the detection instrument (22) is sleeved on the right end of the wire guide rope (12), and then the first rotating block (16), the first threaded waterproof cap (8), the recovery elbow (21), and the second vertical pipe (13) are removed by using a tool again. The second rotating block (18), the second threaded waterproof cap (14) and the second vertical pipe (13) are respectively installed inside the recovery pipe (3) and the delivery pipe (6), so that the detection instrument (22) and the connecting guide ring (23) can be extended into the water supply pipe (1), and in the process of the water body inside the water supply pipe (1) being transported and flowing from right to left, the detection instrument (22) and the connecting guide ring (23) can be driven to gradually move to the left along the surface of the steel wire guide rope (12), so that the detection instrument (22) can detect leakage inside the water supply pipe (1) under the action of movement; E. At the same time, under the action of the recovery elbow (21), the detection instrument (22) and the connecting guide ring (23) can be effectively intercepted inside the water supply pipe (1), and under the action of the magnetic block (24), the connecting guide ring (23) can be firmly adsorbed on the lower end of the recovery elbow (21), and in the process of subsequent personnel using tools to disassemble the first rotating block (16), the first threaded waterproof cap (8) and the recovery elbow (21), the connecting guide ring (23) and the detection instrument (22) can be hooked out from the inside of the water supply pipe (1), thereby achieving the effect of effectively recovering the detection instrument (22).

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