Water pipe leakage point assembly suitable for leakage listening practical training base of water supply network

Abstract

The invention belongs to the technical field of intelligent water affair engineering, and particularly relates to a water pipe leakage point assembly suitable for a water supply network leakage listening practical training base. The structure of the water pipe leakage point assembly comprises a three-way valve used for being connected with a water supply pipeline and further comprises a perforated energy dissipation cavity unit which is arranged on the three-way valve, blocks stones and is used for reducing the echo amplitude of water leakage sound in a hole opening mode. The energy dissipation cavity unit with the holes is arranged in the box body unit with the pipes, the box body unit with the pipes is arranged in the energy dissipation cavity unit with the holes and used for recycling leaked water, and the grid piece for blocking the silt covers the box body unit with the pipes and is used for improving the blocking difficulty of the energy dissipation cavity unit with the holes in the mode of separating stones from a soil layer.

Description

Technical Field

[0001] This application belongs to the field of smart water engineering technology, and in particular relates to a water pipe leak detection component suitable for a water supply network leak detection training base. Background Technology

[0002] A water supply network refers to an underground or above-ground pipeline system that delivers tap water to users from a water treatment plant through various levels of pipes. The main structural components of a water supply network include: main pipes, branch pipes, valves, and water meter wells.

[0003] On the other hand, a water supply network leak detection training base refers to a practical training site specifically built for vocational skills training, teaching experiments, or assessment in smart water management projects, simulating water supply network maintenance operations. Generally, the facilities of this base mainly include: buried pipeline systems, water pipe leak detection components, and road surface structures.

[0004] The primary function of the buried pipeline system is to simulate a real water supply network. The main function of the water pipe leak detection component is to simulate various water pipe leak phenomena, such as pinhole leaks, pipe cracks, loose joints, and pipe wall corrosion perforation. The main function of the road surface structure is to simulate various pipe covering styles, such as asphalt roads, cement roads, mud roads, and sidewalks.

[0005] Correspondingly, the core structure of the aforementioned water pipe leak detection component consists of various solenoid valves, used for controllable on / off and adjustable flow rate drainage to simulate real leaks. Ultimately, trainees and test-takers can then perform leak detection tests, thereby improving their professional skills and service quality in the aforementioned smart water management projects.

[0006] For example, the utility model patent with authorization announcement number CN211294260U and authorization announcement date of August 18, 2020 discloses a pressure pipeline leak detection test training system, whose main structural components include: pipe rack, pipe group, vent valve group, leak detection valve group, return water pipe, water pump, water tank, inlet water pipe, and control box.

[0007] The advantages and functions of the leak detection training system in this utility model patent are: it can provide training on identifying the water acoustic characteristics of leaks in different pipe materials, pipe diameters, and flow velocities.

[0008] However, when this listening comprehension training system is used in actual training and examination processes, it still has at least the following problems regarding its level of realism, specifically manifested as follows:

[0009] The way its leak detection valve assembly simulates water leakage is by directly draining water into the second horizontal pipe, rather than draining water to the outside of the entire system. This is completely different from the way leaked water directly enters the soil layer in reality. Therefore, the simulation is not realistic enough, and the credibility of the training and examination results is relatively poor. Summary of the Invention

[0010] This application provides a water pipe leak detection component suitable for a water supply network leak detection training base. The technical problem it aims to solve is: how to make the simulated water leakage phenomenon in the water supply network leak detection training base have a relatively high degree of realism.

[0011] The technical solution adopted by this application to solve the above problems is: a water pipe leak point component suitable for a water supply network leak detection training base. The structure includes a three-way valve for connecting the water supply pipeline, a perforated energy dissipation cavity unit installed on the three-way valve to block stones and reduce the echo amplitude of the leak sound through perforations, a pipe box unit with the perforated energy dissipation cavity unit inside for recovering leaked water, and a silt blocking mesh covering the pipe box unit and separating stones and soil layers to increase the difficulty of clogging the perforated energy dissipation cavity unit.

[0012] A further preferred technical solution is that the perforated energy dissipation cavity unit includes a cavity for separating the stones and the bypass outlet of the three-way valve, an opening disposed on the cavity for discharging leaked water and reducing the echo amplitude of the leaking sound, and a connecting pipe disposed on the top plate of the cavity for connecting the cavity and the three-way valve.

[0013] A further preferred technical solution is that the pipe-supported box unit includes an open box with the cavity inside, and a return water pipe disposed on the open box and connected to the water collection well.

[0014] A further preferred technical solution includes a positioning port that is disposed on the silt-blocking mesh sheet, passes through the connecting pipe, and is used to fix the silt-blocking mesh sheet during soil backfilling.

[0015] A further preferred technical solution includes a backwater protection mesh sheet disposed within the open box, with its two ends respectively disposed on the connecting pipe and the return water pipe, and used to block stones by covering the inlet end of the return water pipe.

[0016] A further preferred technical solution is that: when filling the open box, the stones are placed on the return water protection mesh plate so that one end of the stones abuts against the open box and the cavity, and the connecting pipe is protected against damage from the stones.

[0017] A further preferred technical solution includes: two fixing ports respectively located at both ends of the return water protection mesh and passed through by the connecting pipe and the return water pipe, and a pipe flange located at the inlet end of the return water pipe and used to block one of the fixing ports.

[0018] A further preferred technical solution is that: the connecting pipe is a flange fitting; before the water pipe leak point assembly is used, the connecting pipe and the pipe flange are screwed together to relatively fix the perforated energy dissipation cavity unit and the pipe box unit.

[0019] A further preferred technical solution is that the perforated energy dissipation cavity unit further includes protruding strips disposed on the outer side and bottom surface of the cavity and abutting against the open box to reduce the water outlet resistance of the opening.

[0020] A further preferred technical solution is that the shape of the mesh sheet for blocking mud and sand is rectangular, and the positioning port is located in the side 1 / 3 area of ​​the length direction of the mesh sheet for blocking mud and sand.

[0021] The beneficial effects of this application include at least the following six points.

[0022] First, the leakage phenomenon controlled by the three-way valve directly leaks water to the outside of the water supply network, rather than inside the network. Therefore, it is closer to the real phenomenon of water leakage in the network, making the leakage listening training base highly realistic and ultimately improving the training quality and the authenticity of the test results.

[0023] Secondly, this water pipe leak point assembly can not only recover leaked water, but also prevent the outlet of the three-way valve from being blocked, and prevent the soil layer from being eroded significantly and prevent a large amount of mud and sand from entering the collection well.

[0024] Third, in this water pipe leak point assembly, the perforated energy dissipation cavity unit has at least the following two functions: 1. Opening the perforation to dissipate energy, reduce echo, and reduce resonance interference; 2. Prevent stones from entering and clogging the three-way valve.

[0025] Fourth, in this water pipe leak point assembly, the mesh plate for backwater protection has at least the following three functions: 1. To specify the filling position of the stones, thereby preventing harmful deviation of the perforated energy dissipation cavity unit during the entire stone filling operation, and facilitating alignment of the perforated energy dissipation cavity unit and the three-way valve; 2. To prevent stones from entering the return water pipe, that is, to allow the use of a relatively thick return water pipe and ensure sufficient return water speed; 3. To appropriately block the stones laterally during the entire stone filling operation, preventing the stones from directly impacting the connecting pipe.

[0026] Fifth, in this water pipe leak point assembly, the connecting pipe shall have at least the following four functions: 1. To fit the mesh plate for backwater protection, preventing the mesh plate from shifting due to stones during filling; 2. To fit the mesh plate for silt blocking, preventing the mesh plate from shifting due to silt during backfilling; 3. To prevent harmful impacts between the perforated energy dissipation cavity unit and the pipe box unit during storage and transportation of this assembly; 4. To allow the installation of the following orifice plate, adding a passive but relatively precise adjustment function to the leakage amplitude adjustment operation.

[0027] Sixth, the positioning openings on the silt-blocking mesh are matched with the relative positions of the perforated energy dissipation cavity unit within the pipe-enclosed box unit, so that the silt-blocking mesh has a relatively small size while ensuring sufficient blocking effect, thereby saving materials. Attached Figure Description

[0028] Figure 1 This is a schematic diagram showing the location of the perforated energy dissipation cavity unit in this application.

[0029] Figure 2 This is a schematic diagram showing the filling position of the stones in this application.

[0030] Figure 3 This is a schematic diagram of one embedding location of the pipe-supported box unit in this application, taken at a cross-sectional angle.

[0031] Figure 4 This is a structural schematic diagram of the tubular box unit in this application.

[0032] Figure 5 This is a schematic diagram of the perforated energy dissipation cavity unit in this application.

[0033] Figure 6 This is a schematic diagram of one shape of the throttling orifice plate in this application.

[0034] Figure 7 This is a schematic diagram showing the installation position of the throttling orifice plate in this application.

[0035] Figure 8 This is a schematic diagram showing the relative positions and dimensions of the mesh sheets for sediment blocking and the mesh sheets for backwater protection in this application.

[0036] Figure 9 This is a schematic diagram showing the storage and transportation status of the water pipe leak point component in this application.

[0037] Figure 10 This is a schematic diagram illustrating the harmful phenomenon where the mesh sheet used for blocking mud and sand cannot fully cover the tube-enclosed box unit when the perforated energy dissipation cavity unit in this application does not abut against the tube-enclosed box unit on one side, i.e., when the installation position is incorrect.

[0038] Figure 11This is a top-down view showing the position of the expanded mesh for blocking mud and sand in this application.

[0039] The meanings of the markings in the diagram are as follows.

[0040] Water supply pipes a, stones b, soil layer c, sidewalk slabs d, cement layer e, foundation stone layer f;

[0041] Three-way valve 11;

[0042] 1. Perforated energy dissipation cavity unit; 2. Pipe-connected box unit; 3. Sediment blocking mesh plate; 3-1. Positioning port; 4. Return water protection mesh plate; 4-1. Fixing port; 5. Throttling orifice plate.

[0043] Cavity 101, opening 102, connecting pipe 103, protruding strip 104;

[0044] Open box 201, return water pipe 202, pipe flange 203. Detailed Implementation

[0045] The following description is merely a preferred embodiment of this application and is not intended to limit the scope of this application.

[0046] As attached Figure 1 -Appendix Figure 11 As shown, a water pipe leak detection component suitable for a water supply network leak detection training base includes a three-way valve 11 for connecting to a water supply pipe a, a perforated energy dissipation cavity unit 1 installed on the three-way valve 11 to block stones b and reduce the echo amplitude of the leak sound through perforations, a pipe box unit 2 with the perforated energy dissipation cavity unit 1 inside for recovering leaked water, and a silt blocking mesh 3 covering the pipe box unit 2 and separating stones b and soil layers c to increase the difficulty of clogging the perforated energy dissipation cavity unit 1.

[0047] In this embodiment, the specific structure of the water pipe leak point assembly consists of: a three-way valve 11, a perforated energy dissipation cavity unit 1, a pipe-mounted box unit 2, and a mesh sheet 3 for blocking mud and sand.

[0048] The three-way valve 11 is a commercially available product, such as an electric three-way ball valve. The working principle and main function of the three-way valve 11 are: to simulate water leakage in the water supply pipeline by opening the bypass outlet; and to simulate various different leakage phenomena by adjusting the drainage flow rate at the bypass outlet. Specifically, for example, small hole seepage and pipe cracks correspond to relatively low drainage flow rates; loose joints and pipe wall corrosion perforation require relatively high drainage flow rates.

[0049] On the other hand, both the perforated energy dissipation cavity unit 1 and the tubular box unit 2 are made of PVC, thus providing relatively outstanding weather resistance. Both have a rectangular outline, but the former includes a top plate, while the latter does not. The main reason why the tubular box unit 2 does not have a top plate is:

[0050] 1. If the pipe-supported box unit 2 includes a top plate and is also cavity-shaped, then stone b is not needed. In this case, the weight of the soil layer above is supported by the pipe-supported box unit 2 itself, which is unstable. The cavity-shaped pipe-supported box unit 2 is easily crushed. Correspondingly, this is one of the reasons why the size of the perforated energy dissipation cavity unit 1 is significantly smaller than that of the pipe-supported box unit 2.

[0051] 2. This allows the pipe-supported box unit 2 to receive not only leaked water from the perforated energy dissipation cavity unit 1, but also rainwater, further enhancing the practicality of the leak detection training base.

[0052] Furthermore, the silt-blocking mesh 3 is made of wire mesh or geotextile and is rectangular in shape. It is used to fully cover the upper open portion of the pipe-supported box unit 2, preventing large amounts of silt from flowing downwards into the box unit 2. Otherwise, the subsequent harmful phenomena mainly include the following two:

[0053] First, the drain hole of the perforated energy dissipation cavity unit 1 is blocked, making it difficult to effectively simulate water leakage in the water supply pipeline for a long period of time.

[0054] Secondly, the entry of silt into the leakage water recovery pipeline of the piped box unit 2 causes significant soil erosion problems.

[0055] In use, the sand-blocking mesh 3 has a central area that bulges upwards and the sides that droop downwards, covering the outer surface of the pipe-supported box unit 2. The four sides of the sand-blocking mesh 3 can be further bound and fixed to the pipe-supported box unit 2, thereby improving the stability of the filling method of the stones b within the pipe-supported box unit 2.

[0056] The perforated energy dissipation cavity unit 1 includes a cavity 101 for separating the stone b and the bypass outlet of the three-way valve 11, an opening 102 disposed on the cavity 101 for discharging leaked water and reducing the echo amplitude of the leaking sound, and a connecting pipe 103 disposed on the top plate of the cavity 101 for connecting the cavity 101 and the three-way valve 11.

[0057] In this embodiment, the length, width, and height of the cavity 101 are all within the range of 5-10cm, and the opening 102 is a circular hole with a diameter of 2-3mm. The connecting pipe 103 is vertically arranged, with its lower end integrally formed with the cavity 101, and its upper end provided with a flange for connecting the three-way valve 11.

[0058] Specifically, the perforated energy dissipation cavity unit 1 has two shape characteristics: relatively small size and multiple holes. Therefore, by utilizing the two principles of small cavity size, high cutoff frequency, and the disruption of standing waves by the porous structure, the echo / resonance problem of water leakage sound can be significantly alleviated, making this water pipe leak point component suitable for various training and examinations in leak detection training bases.

[0059] On the other hand, the aforementioned orifice plate 5 can also be provided on the connecting pipe 103, or between it and the three-way valve 11. The orifice plate 5 is also a commercially available product; its specific shape and style can be found in the attached diagram. Figure 6 The main function of the orifice plate 5 is flow control, namely:

[0060] Depending on the diameter of the central hole of the throttling orifice plate, a suitable throttling orifice plate 5 is selected, thereby adding a passive but relatively precise adjustment function to the leakage amplitude adjustment operation at the three-way valve 11.

[0061] For example, if one of the three-way valves 11 is set to simulate the leakage phenomenon of a small hole, it can be paired with a throttling orifice plate 5 with a relatively small central hole size, such as 0.5 mm, and drain water at a low flow rate at all times; if the other three-way valve 11 is set to simulate the phenomenon of loose or disconnected interface, it can be paired with a throttling orifice plate 5 with a relatively large central hole size, such as 2.0 mm, and drain water at a high flow rate at all times.

[0062] Correspondingly, after setting the orifice plate 5, the unexpectedly increased flow velocity at the three-way valve 11 can be reduced and controlled, making the simulation effect of water leakage more accurate.

[0063] The pipe-supported box unit 2 includes an open box 201 with the cavity 101 inside, and a return water pipe 202 disposed on the open box 201 and connected to the water collection well.

[0064] In this embodiment, the structure of the open box 201 includes 4 side plates and 1 bottom plate. The return water pipe 202 is installed on one of the side plates or the bottom plate, and its other end enters the water collection well.

[0065] Specifically, the location of the water collection well is relatively far away from all the three-way valves 11 to avoid the sound of water falling from the water collection well affecting the simulated leakage sound at the three-way valves 11. Accordingly, this leak-listening training base is suitable for training and examinations at night or in the early morning.

[0066] The structure of the water pipe leak point assembly also includes a positioning port 3-1, which is set on the mud and sand blocking mesh 3, passed through the connecting pipe 103, and used to fix the mud and sand blocking mesh 3 during backfilling of soil layer c.

[0067] In this embodiment, the positioning port 3-1 is circular in shape, and its main function is to fit on the connecting pipe 103, so that when the soil layer c is backfilled, the mud and sand blocks are difficult to pull and shift the mud and sand blocking mesh 3, and ensure that the mud and sand blocking mesh 3 can completely cover the upper opening position of the opening box 201.

[0068] Specifically, for example, attached Figure 3 As shown, the water supply pipe a is buried in soil layer c at a depth of 0.8-1.5m. The pipe-supported box unit 2 is located below it, also within soil layer c. After the water pipe leak point assembly is installed, the soil layer c above it needs to be backfilled. The layers above soil layer c, such as the cement layer e, the sidewalk slab d, and the asphalt layer, also need to be restored.

[0069] The structure of the water pipe leak point assembly also includes a backwater protection mesh 4, which is disposed inside the open box 201 and has its two ends respectively disposed on the connecting pipe 103 and the return water pipe 202, and is used to block the stone b by covering the water inlet end of the return water pipe 202.

[0070] In this embodiment, the material of the backwater protection mesh 4 is the same as that of the silt blocking mesh 3, and its shape is also rectangular, with its length and width dimensions being smaller than those of the silt blocking mesh 3.

[0071] The mesh sheet 4 for backwater protection has at least the following two functions:

[0072] First, add another layer of barrier structure between soil layer c and return water pipe 202, and between soil layer c and opening 102, to further prevent mud and soil from entering return water pipe 202 and opening 102.

[0073] Secondly, a new barrier structure is added between the stone b and the return water pipe 202, allowing the inner diameter of the return water pipe 202 to be larger than the particle size of the stone b. This enables the pipe-supported box unit 2 to have a relatively large drainage capacity, preventing the upper edge of the open box 201 from overflowing outwards. This is essential for simulating a water pipe leak point assembly with a large leakage volume.

[0074] When stone b is filled into the open box 201, it is placed on the return water protection mesh 4 so that one end of the stone abuts against the open box 201 and the cavity 101, and the connecting pipe 103 is protected from damage by the stone.

[0075] In this embodiment, the third function of the backwater protection mesh 4 is to specify the filling position of the stone b in the open box 201, so that the cavity 101 can abut against the other end of the open box 201, ensuring that the cavity 101 is not prone to harmful displacement during the entire filling process of the stone b.

[0076] Specifically, the outline width of the cavity 101 is adapted to the inner width of the opening box 201, and the stone b is only piled up on one side of the cavity 101. See the attached diagram for details. Figure 2 .

[0077] The structure of the water pipe leak point assembly also includes two fixing ports 4-1 respectively located at both ends of the return water protection mesh plate 4 and passed through by the connecting pipe 103 and the return water pipe 202, and a pipe flange 203 located at the water inlet end of the return water pipe 202 and used to block one of the fixing ports 4-1.

[0078] In this embodiment, the fixing port 4-1 is also a circular opening, and its function is similar to that of the positioning port 3-1. Specifically, the main function of the fixing port 4-1 is to prevent the stone b from directly hitting the connecting pipe 103 and the return water pipe 202 when the stone b is being filled.

[0079] Meanwhile, during the filling of stone b, collisions are inevitable, resulting in stone fragments. The return water protection mesh 4, through the positioning function at the fixing port 4-1, ensures that the return water protection mesh 4 stably covers the upper surface of the cavity 101 and the side facing stone b, and stably covers the inlet end of the return water pipe 202, thereby preventing the aforementioned stone fragments from clogging the opening 102 and entering the return water pipe 202, just like mud and soil.

[0080] The connecting pipe 103 is a flange fitting; before the water pipe leak point assembly is used, the connecting pipe 103 and the pipe flange 203 are screwed together to fix the perforated energy dissipation cavity unit 1 and the pipe box unit 2.

[0081] In this embodiment, the return water pipe 202 of the pipe flange 203 has another function: when the water pipe leak point assembly is stored and transported, it can relatively fix the perforated energy dissipation cavity unit 1 and the pipe box unit 2, avoiding harmful collisions between the two, which is extremely practical and safe.

[0082] Meanwhile, the diameter of the pipe flange 203 is larger than that of the return water pipe 202, so that one of the fixing ports 4-1 can be blocked by the pipe flange 203, ensuring that one end of the return water protection mesh plate 4 is stably installed on the return water pipe 202. This is both ingenious and necessary.

[0083] The perforated energy dissipation cavity unit 1 further includes a protruding strip 104 disposed on the outer side and bottom surface of the cavity 101 and abutting against the open box 201 to reduce the water outlet resistance of the opening 102.

[0084] In this embodiment, the number of protruding strips 104 is at least four, respectively disposed on three sides and one lower surface of the cavity 101, to prevent the opening box 201 from reducing the drainage speed of the opening 102 due to being too close to it. For details, please refer to the attached diagram. Figure 5 .

[0085] The mesh sheet 3 for blocking mud and sand is rectangular in shape, and the positioning port 3-1 is located in the side 1 / 3 area along the length of the mesh sheet 3 for blocking mud and sand.

[0086] In this embodiment, in order to protect the perforated energy dissipation cavity unit 1 during the filling process of stone b, the perforated energy dissipation cavity unit 1 can be manually pushed to one side of the tube box unit 2 before the filling process, so that the subsequently added stone b will not move the perforated energy dissipation cavity unit 1, but will only appropriately press the perforated energy dissipation cavity unit 1.

[0087] Correspondingly, the perforated energy dissipation cavity unit 1 is offset within the tubular box unit 2, so that the positioning port 3-1 cannot be centered on the mud and sand blocking mesh plate 3. Therefore, it is positioned at the side 1 / 3 position, so that the mud and sand blocking mesh plate 3 has the dual function of fixing the position and completely covering the tubular box unit 2. That is, if mud and sand enter the tubular box unit 2, they must pass through the mud and sand blocking mesh plate 3.

[0088] Finally, the aforementioned stone block b can be replaced with a hollow plastic block, thus providing sufficient support strength and relatively low weight, further enhancing the practicality of the water pipe leak point assembly. In this case, the water pipe leak point assembly can be prefabricated in the factory or on the ground at the construction site, eliminating the relatively complex and dangerous construction step of lowering stone block b.

[0089] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this application. These are non-inventive modifications and are protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. A water pipe leakage point assembly suitable for a water supply pipe network leak listening training base, the structure comprising a tee valve (11) for connecting a water supply pipe (a), characterized in that: Also included are a perforated energy dissipation cavity unit (1) provided on the tee valve (11) and blocking the stones (b) and reducing the echo amplitude of the water leakage sound through the way of opening, a pipe box unit (2) internally provided with the perforated energy dissipation cavity unit (1) and used for recovering the leaked water, and a mesh sheet (3) for blocking silt provided on the pipe box unit (2) and separating the stones (b) and the soil layer (c) to improve the blocking difficulty of the perforated energy dissipation cavity unit (1).

2. The water pipe leakage point assembly suitable for a water supply network leakage listening practical training base according to claim 1, characterized in that: The perforated energy dissipation cavity unit (1) includes a cavity (101) for separating the stones (b) and the bypass outlet of the tee valve (11), an opening (102) provided on the cavity (101) and used for discharging the leaked water and reducing the echo amplitude of the water leakage sound, and a connecting pipe (103) provided on the top plate of the cavity (101) and used for connecting the cavity (101) and the tee valve (11).

3. The water pipe leak point assembly suitable for use in a water pipe network leak listening training ground according to claim 2, characterized in that: The pipe box unit (2) includes an open box (201) internally provided with the cavity (101), and a return water pipe (202) provided on the open box (201) and connected to the water collecting well.

4. The water pipe leak assembly suitable for use in a water pipe network leak listening training base according to claim 2, characterized in that: Also included are positioning openings (3-1) provided on the mesh sheet (3) for blocking silt and penetrated by the connecting pipe (103) and used for fixing the mesh sheet (3) during the backfilling of the soil layer (c).

5. The water pipe leak assembly suitable for use in a water pipe network leak listening training ground according to claim 3, characterized in that: Also included are a return water protection mesh sheet (4) provided in the open box (201) and provided on both ends of the connecting pipe (103) and the return water pipe (202) and covering the water inlet end of the return water pipe (202) to block the stones (b).

6. A water pipe leak assembly suitable for use in a leak listening training site for a water supply network according to claim 5, characterized in that: When the stones (b) are filled in the open box (201), the return water protection mesh sheet (4) is laid on the stones (b) to abut against the open box (201) and the cavity (101) on one side and protect the connecting pipe (103) from being damaged by the stones.

7. The water pipe leak assembly suitable for use in a water pipe network leak listening training ground according to claim 6, characterized in that: Also included are two fixing openings (4-1) provided on both ends of the return water protection mesh sheet (4) and penetrated by the connecting pipe (103) and the return water pipe (202), and a pipe body flange (203) provided on the water inlet end of the return water pipe (202) and used for blocking one of the fixing openings (4-1).

8. The water pipe leak assembly suitable for use in a water pipe network leak listening training ground according to claim 7, characterized in that: The connecting pipe (103) is a flange pipe; before use, the perforated energy dissipation cavity unit (1) and the pipe box unit (2) are fixed relatively by screwing the connecting pipe (103) and the pipe body flange (203).

9. The water pipe leak assembly for use in a leak listening training site for water supply pipe network according to claim 6, characterized in that: The perforated energy dissipation cavity unit (1) further includes protruding strips (104) provided on the outer side and the outer bottom of the cavity (101) and abutting against the open box (201) to reduce the water outlet resistance of the opening (102).

10. The water pipe leak assembly suitable for use in a water pipe network leak listening training ground according to claim 4, characterized in that: The shape of the silt blocking mesh sheet (3) is rectangular, and the positioning opening (3-1) is arranged in the 1 / 3 area of the side in the length direction of the silt blocking mesh sheet (3).

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