A water leakage detection device for intelligent water meter

Abstract

The utility model discloses a kind of water leakage detection devices for intelligent water meter, comprising: U-shaped support plate, its left side is fixed with PLC controller;Extrusion sealing connection component, it is two groups, the extrusion sealing connection component of right side is fixedly installed on the right side inner wall of U-shaped support plate, the digital pressure gauge is fixedly connected in the right end of the extrusion sealing connection component of right side;Z-shaped pipe, left end of the extrusion sealing connection component of left side is fixedly connected in. The utility model is provided with a series of structures, it is convenient to automatically fast accurate control pressure and the two water end extrusion sealing connection of intelligent water meter body, utilize the mode that both sides accurate clamping sealing is formed by control pressure extrusion, automatically form the shielding limiting effect of both sides, avoid the risk of slipping when subsequent water pressure, improve connection stability and accuracy, and only need single start one electric telescopic rod can realize horizontal drive and sealing work, improve operation convenience.

Description

Technical Field

[0001] This utility model relates to the field of smart water meter leak detection technology, specifically a smart water meter leak detection device. Background Technology

[0002] Smart water meters are a new type of water meter that uses modern microelectronics, modern sensing technology, and smart IC card technology to measure water consumption, transmit water data, and settle transactions. Compared with traditional water meters, which generally only have the functions of flow collection and mechanical pointer display of water consumption, this is a significant improvement. After the existing smart water meters are manufactured, they need to be connected to a detection water pipe for leakage detection. The existing detection water pipe has a flange, which is connected to the flange on the water meter by multiple sets of bolts and nuts. Multiple sets of bolts and nuts make the disassembly and assembly of the water meter more complicated and inconvenient for the testing of large batches of water meters.

[0003] Existing designs have improved the detection connection to address the aforementioned deficiencies. For example, document CN220751457U discloses a leak-proof detection device for smart water meter manufacturing, including a base with a connector on the base. One end of the connector is fixedly connected to a delivery pipe. An annular piston cavity is provided inside the outer wall of the connector, and an annular piston plate slides within the annular piston cavity. Hydraulic oil is contained within the annular piston cavity. An annular sealing airbag is fixedly fitted around the connector. The connector is inserted into the smart water meter body by a first cylinder, and then the annular sealing airbag is opened by activating a second cylinder, ensuring a good seal between the connector and the smart water meter body. Liquid is then delivered through the delivery pipe for detection. Therefore, this device simplifies the process compared to existing technologies. It only requires activating the first and second cylinders to stably insert the connector into the smart water meter body, making it suitable for large-scale testing.

[0004] The above technology involves inserting a connector into the water inlet of a smart water meter using a first cylinder, followed by an expansion of the annular sealing airbag on the outside of the connector using a second cylinder to seal it tightly against the inside of the water inlet of the smart water meter. Water is then supplied via a delivery pipe to an external water source for testing. However, this technology has the following drawbacks in practical use:

[0005] The current method simply inserts a drive connector into the inside of the water inlet of the smart water meter and uses an airbag to expand and seal it. However, the lateral restraint is poor, and there is a risk of dislodgement due to high pressure during pressurization. It is difficult to accurately, stably, conveniently and quickly seal the connection with the water inlet of the smart water meter. The connection stability is not ideal, and the lateral drive and sealing work need to be carried out separately, which is not convenient. In view of this, a leak detection device for smart water meters is proposed to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of this invention is to provide a leak detection device for smart water meters to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof detection device for smart water meters, comprising:

[0008] The U-shaped support plate has a PLC controller fixedly installed on its left side;

[0009] The extrusion sealing connection assembly consists of two sets. The extrusion sealing connection assembly located on the right side is fixedly installed on the inner right side wall of the U-shaped support plate. A digital pressure gauge is fixedly connected to the right end of the extrusion sealing connection assembly located on the right side.

[0010] A Z-shaped tube is connected to the left end of the extrusion sealing assembly fixed on the left side. The left end of the Z-shaped tube is connected to a one-way valve with an outlet on the right side. The left end of the one-way valve is connected to a delivery pipe.

[0011] The side-pressure horizontal drive assembly is installed between the left side of the U-shaped support plate and the left side of the left-side extrusion sealing connection assembly, and is electrically connected to the PLC controller. The side-pressure horizontal drive assembly is used to control the rightward movement of the left-side extrusion sealing connection assembly under the control of the PLC controller to pressurize and tighten the connection at the water inlet of the smart water meter body. The two extrusion sealing connection assemblies are used to perform sealing connection work when the water inlet at both ends of the smart water meter body is pressed.

[0012] Preferably, the extrusion sealing assembly includes a pressure box, a connecting tube, and a sealing ring. The two pressure boxes are both open on their adjacent sides. The pressure box on the right is fixedly connected to the inner wall of the right side of the U-shaped support plate. The two connecting tubes are respectively embedded and fixed on the inner wall of the corresponding pressure box on the side away from its opening. The outer edges of the two connecting tubes are integrally provided with an outer edge at their adjacent ends. The two outer edges that are repulsive are respectively fixed to the inner wall of the corresponding pressure box on the side away from its opening. The two sealing rings are respectively bonded and fixed on the two outer edges that are adjacent to each other. The right end of the connecting tube on the right is set as a sealing structure. A digital pressure gauge is fixedly installed on the right end of the connecting tube on the right, and its detection end extends into the connecting tube on the right. The left end of the connecting tube on the left is connected and fixed to the right end of the Z-shaped tube.

[0013] Preferably, the side-pressure transverse drive assembly includes a support sleeve, a digital pressure sensor, T-shaped guide rods, a movable seat, and an electric telescopic rod. The right side of the support sleeve is fixedly connected to the left side of the left pressure box. The top and right side of the support sleeve are both open. The digital pressure sensor is fixedly connected to the left side of the support sleeve. The movable seat is fixedly installed on the left side of the digital pressure sensor. The electric telescopic rod is embedded and fixed on the left inner wall of the U-shaped support plate, and its extended end is fixedly connected to the left side of the movable seat. There are four T-shaped guide rods, which are rectangularly fixedly connected to the left side of the support sleeve. The movable seat and the U-shaped support plate are slidably sleeved on the four T-shaped guide rods. The electric telescopic rod and the digital pressure sensor are electrically connected to the PLC controller through wires.

[0014] Preferably, the delivery pipe is an explosion-proof flexible hose used to connect to external water supply equipment.

[0015] Preferably, four rectangular horizontal guide holes are provided on the left side of the movable seat and the left inner wall of the U-shaped support plate, and the horizontal guide holes are slidably sleeved on the corresponding T-shaped guide rods.

[0016] Preferably, an adjustable support assembly is installed on the bottom inner wall of the U-shaped support plate. The adjustable support assembly is used to provide auxiliary support for the bottom of the smart water meter body. The adjustable support assembly includes an outer tube, a T-shaped support, and a knob bolt. The outer tube is embedded and fixed on the bottom inner wall of the U-shaped support plate. The lower part of the T-shaped support is slidably sleeved inside the outer tube. The right end of the knob bolt is pressed tightly against the lower left side of the T-shaped support and threadedly connected to the outer tube.

[0017] Preferably, the left side of the outer tube has a threaded hole for threaded connection with a knob-type bolt.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. Through the coordinated use of the U-shaped support plate, PLC controller, extrusion sealing connection component, and side pressure transverse drive component, the system can automatically, quickly, and accurately control the pressure to tightly seal the two water inlet ends of the smart water meter body. By using pressure control and extrusion to form a precise clamping seal on both sides, the system automatically restricts the obstruction formed on both sides, avoiding the risk of slippage during subsequent water injection and pressurization, thus improving connection stability and accuracy. Moreover, only one electric telescopic rod needs to be activated to achieve transverse drive and sealing operations, improving operational convenience.

[0020] 2. By using the set extrusion sealing connection components, digital pressure gauge, Z-shaped pipe, one-way valve and delivery pipe, it is possible to determine whether there is a water leakage by observing the change in water pressure value detected by the digital pressure gauge after water is pumped and pressurized;

[0021] 3. The adjustable support components provide auxiliary support when placing the smart water meter, eliminating the need for temporary hand support during placement, improving ease of use, and allowing for flexible adjustment of the support height according to different smart water meter models.

[0022] This utility model features a series of structures that facilitate automatic, rapid, and precise pressure control to tightly seal the two water inlet ends of the smart water meter body. By using pressure control and squeezing to form a precise clamping seal on both sides, it automatically restricts the flow of water from the sides, preventing the risk of slippage during subsequent water injection and pressurization. This improves the stability and accuracy of the connection. Furthermore, only one electric telescopic rod needs to be activated to achieve both horizontal movement and sealing, enhancing operational convenience. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a leak-proof detection device for a smart water meter according to Embodiment 1 of this utility model;

[0024] Figure 2 This is a front sectional view of a water leakage detection device for a smart water meter according to Embodiment 1 of this utility model.

[0025] Figure 3 This is a schematic diagram of the structure of a leak-proof detection device for a smart water meter according to Embodiment 2 of this utility model;

[0026] Figure 4 This is a front sectional view of a water leakage detection device for a smart water meter according to Embodiment 2 of this utility model.

[0027] In the diagram: 100, Smart water meter body; 1, U-shaped support plate; 101, PLC controller; 2, Pressure box; 201, Connecting pipe; 202, Sealing ring; 203, Z-shaped pipe; 204, One-way valve; 205, Delivery pipe; 206, Digital pressure gauge; 3, Support sleeve; 301, Digital pressure sensor; 302, Moving base; 303, T-shaped guide rod; 304, Electric telescopic rod; 4, Outer pipe; 401, T-shaped support; 402, Knob bolt. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] like Figures 1 to 2 As shown in this embodiment, a leak detection device for smart water meters includes:

[0031] The U-shaped support plate 1 has a PLC controller 101 fixedly installed on its left side;

[0032] The extrusion sealing connection assembly consists of two sets. The extrusion sealing connection assembly on the right side is fixedly installed on the inner right side wall of the U-shaped support plate 1. The right end of the extrusion sealing connection assembly on the right side is connected to and fixed with a digital pressure gauge 206.

[0033] Z-shaped tube 203 is connected to the left end of the extrusion sealing connection assembly fixed on the left side. The left end of Z-shaped tube 203 is connected to a one-way valve 204 with the right side as the outlet. The left end of one-way valve 204 is connected to a delivery pipe 205, which is an explosion-proof hose used to connect to external water supply equipment.

[0034] The side-pressure horizontal drive assembly is installed between the left side of the U-shaped support plate 1 and the left side of the left-side extrusion sealing connection assembly, and is electrically connected to the PLC controller 101. The side-pressure horizontal drive assembly is used to drive the left-side extrusion sealing connection assembly to move to the right under the control of the PLC controller 101 to control the pressure and squeeze the connection of the water inlet end of the smart water meter body 100. The two extrusion sealing connection assemblies are used to perform sealing connection work when squeezing the water inlet ends at both ends of the smart water meter body 100.

[0035] Furthermore, such as Figure 1 and 2 As shown, the extrusion sealing connection assembly includes a pressure box 2, a connecting tube 201, and a sealing ring 202. The two pressure boxes 2 are both open on the side where they are close to each other. The pressure box 2 on the right side is fixedly connected to the inner wall of the right side of the U-shaped support plate 1. The two connecting tubes 201 are respectively embedded and fixed on the inner wall of the corresponding pressure box 2 on the side away from its opening. The outer side of the two connecting tubes 201 that are close to each other is integrally provided with an outer edge. The two outer edges that are repulsive are respectively fixed to the inner wall of the corresponding pressure box 2 on the side away from its opening. The two sealing rings 202 are respectively bonded and fixed on the side where the two outer edges are close to each other. The right end of the connecting tube 201 on the right side is set as a sealing structure. The digital pressure gauge 206 is fixedly installed on the right end of the connecting tube 201 on the right side, and its detection end extends into the connecting tube 201 on the right side. The left end of the connecting tube 201 on the left side is connected and fixed to the right end of the Z-shaped tube 203.

[0036] In this embodiment, the pressure box 2, connecting pipe 201, and sealing ring 202 work together. When the pressure box 2 on the left moves to the right, it drives the connecting pipe 201 and sealing ring 202 on the left to move to the right. When the smart water meter body 100 is placed between the two pressure boxes 2 and its right water inlet end is attached to the surface of the sealing ring 202 on the right, the sealing ring 202 on the left moves to the right and squeezes the water inlet end on the left side of the smart water meter body 100. Under the squeezing force, the water inlet end on the right side of the smart water meter body 100 is squeezed with the sealing ring 202 on the right side with the same force, so as to achieve the effect of sealing and squeezing connection of the water inlet ends on both sides of the smart water meter body 100.

[0037] Furthermore, such as Figure 1 and 2 As shown, the side-pressure transverse drive assembly includes a support sleeve 3, a digital pressure sensor 301, a T-shaped guide rod 303, a movable seat 302, and an electric telescopic rod 304. The right side of the support sleeve 3 is fixedly connected to the left side of the pressure box 2 on the left side. The top and right side of the support sleeve 3 are both set as openings. The digital pressure sensor 301 is fixedly connected to the left side of the support sleeve 3. The movable seat 302 is fixedly installed on the left side of the digital pressure sensor 301. The electric telescopic rod 304 is embedded and fixedly fixed on the left inner wall of the U-shaped support plate 1, and its extended end is fixedly connected to the left side of the movable seat 302. There are four T-shaped guide rods 303, which are rectangular and fixedly connected to the left side of the support sleeve 3. The movable seat 302 and the U-shaped support plate 1 are both slidably sleeved on the four T-shaped guide rods 303. The electric telescopic rod 304 and the digital pressure sensor 301 are both electrically connected to the PLC controller 101 through wires.

[0038] In this embodiment, four rectangular horizontal guide holes are provided on the left side of the movable seat 302 and the inner left side of the U-shaped support plate 1. The horizontal guide holes are slidably sleeved on the corresponding T-shaped guide rods 303. The U-shaped support plate 1 and the movable seat 302 are slidably sleeved on the four T-shaped guide rods 303 through the corresponding four horizontal guide holes, which plays the role of lateral sliding guidance of the T-shaped guide rods 303.

[0039] In this implementation scheme, the support sleeve 3, digital pressure sensor 301, T-shaped guide rod 303, movable seat 302, and electric telescopic rod 304 are used. The PLC controller 101 is pre-set to control the closing pressure value of the electric telescopic rod 304. The electric telescopic rod 304 is started in the forward direction, causing it to drive the movable seat 302 to move to the right. The movable seat 302 drives the support sleeve 3 to move to the right through the digital pressure sensor 301. The support sleeve 3 drives the pressure box 2 on the left side to move to the right to perform the compression sealing connection. When the pressure box 2 on the left side is blocked by the water inlet end on the left side of the smart water meter body 100, the movable seat 302, which continues to move to the right, compresses the digital pressure sensor 301. The digital pressure sensor 301 detects the compressive force applied by the movable seat 302 and converts it into a digital signal through its integrated ADC, outputting the compressive force value to the PLC controller 101. When the preset value is reached, the PLC controller 101 controls the electric telescopic rod 304 to close, achieving the effect of automatic and rapid pressure control and compression sealing connection.

[0040] It should be noted that both the electric telescopic rod 304 and the digital pressure sensor 301 are electrically connected to the PLC controller 101 via wires. This direct wire connection, allowing control of the PLC controller 101 and direct data transmission, is a mature and well-known conventional wired control method for existing controllers, and will not be elaborated further here. The PLC controller 101 is preferably a Delta DVP series PLC (model DVP04AD-H3), which has a built-in communication industrial wire port and can be directly connected to the digital pressure sensor 301 via wires. The digital pressure sensor 301 is preferably a Transcell BSS series plate-type (pressure-type) digital load cell, mainly because the digital load cell integrates an ADC to convert the data into a digital signal and outputs the compressive pressure value for direct reading and reception by the PLC controller 101.

[0041] In addition, regarding the power supply for the electric telescopic pole 304 and the digital pressure sensor 301, since there is no lack of power supply measures at the manufacturing, processing and testing site of the smart water meter body 100, the existing mains power supply resources on site are used. The mains cables are connected to the power input interfaces of the above-mentioned electrical components through conventional power distribution devices such as the power cords of the electrical components to form a complete power supply circuit. This provides power for the conventional on-site cable foundation connection. These are all conventional, mature and well-known methods, and will not be described in detail here.

[0042] This embodiment facilitates automatic, rapid, and precise pressure control to tightly seal the two water inlet ends of the smart water meter body 100. By using pressure control and tight sealing to form a precise clamping seal on both sides, the system automatically restricts the obstruction on both sides, avoiding the risk of slippage during subsequent water injection and pressurization. This improves connection stability and accuracy, and only requires the activation of a single electric telescopic rod 304 to achieve horizontal drive and sealing operations, thus enhancing operational convenience.

[0043] The usage method of this embodiment is as follows: When using the smart water meter with the anti-leakage detection device, the smart water meter body 100 is placed directly between the two pressure boxes 2, with its right water inlet end attached to the surface of the right sealing ring 202. The pressure value for controlling the closing of the electric telescopic rod 304 is preset using the PLC controller 101. The electric telescopic rod 304 is started in the forward direction, causing it to drive the moving seat 302 to move to the right. The moving seat 302 drives the support sleeve 3 to move to the right through the digital pressure sensor 301. The support sleeve 3 drives the four T-shaped guide rods 303 to slide to the right in their respective horizontal guide holes to perform horizontal guiding work. The support sleeve 3 drives the left pressure box 2 to move to the right. When the left pressure box 2 moves to the right, it drives the left connecting pipe 201 and sealing ring 202 to move to the right. When the left sealing ring 202 moves to the right, it squeezes the left water inlet end of the smart water meter body 100. Under the squeezing force, the right side of the smart water meter body 100 is driven... The water inlet end is squeezed with the sealing ring 202 on the right with the same force. When the pressure box 2 on the left is blocked and restricted by the water inlet end on the left side of the smart water meter body 100, the moving seat 302, which continues to move to the right, squeezes the digital pressure sensor 301. The digital pressure sensor 301 detects the squeezing force applied by the moving seat 302 and converts it into a digital signal through its integrated ADC, outputting the squeezing force value to the PLC controller 101. When the preset value is reached, the PLC controller 101 controls the electric telescopic rod 304 to close, realizing the effect of automatically, quickly and accurately controlling the pressure to squeeze and seal the two water inlets of the smart water meter body 100. By using the pressure control and squeezing to form a precise clamping seal on both sides, the blocking and restriction effect formed on both sides is automatically achieved, avoiding the risk of slippage when water is pumped and pressurized, improving the connection stability and accuracy. Moreover, only one electric telescopic rod 304 needs to be started to realize the horizontal drive and sealing work, improving the convenience of operation.

[0044] The delivery pipe 205 is pre-connected to the water supply end of the external water supply equipment. The external water supply equipment sequentially pumps water into the Z-shaped pipe 203 through the delivery pipe 205 and the one-way valve 204. The water then sequentially enters the smart water meter body 100 through the left connecting pipe 201 and the sealing ring 202, and then enters the right connecting pipe 201. The digital pressure gauge 206 detects and displays the water pressure through the right connecting pipe 201. After the water is pumped and pressurized and the external water supply equipment is turned off, the change in the pressure value of the digital pressure gauge 206 is observed to determine whether there is a water leakage. When the pressure value decreases, it means that there may be a leakage in the smart water meter body 100 itself or in the top sealing glass, which is unqualified. When the pressure value does not change, it is qualified.

[0045] After the test is completed, the personnel reverse the start of the electric telescopic rod 304 so that it moves the pressure box 2 on the left side to the left in sequence through the moving seat 302, the digital pressure sensor 301 and the support sleeve 3, thereby releasing the clamping state. Then the smart water meter body 100 can be taken out and replaced with the next smart water meter body 100 to continue the test.

[0046] Example 2

[0047] like Figure 3 and 4 As shown, this embodiment differs from Embodiment 1 in that: an adjustable support assembly is installed on the bottom inner wall of the U-shaped support plate 1. The adjustable support assembly is used to provide auxiliary support for the bottom of the smart water meter body 100. The adjustable support assembly includes an outer tube 4, a T-shaped support 401, and a knob bolt 402. The outer tube 4 is embedded and fixed on the bottom inner wall of the U-shaped support plate 1. The lower part of the T-shaped support 401 is slidably sleeved inside the outer tube 4. The right end of the knob bolt 402 is pressed and contacted with the lower left side of the T-shaped support 401 and threadedly connected to the outer tube 4. A threaded hole for threaded connection with the knob bolt 402 is opened on the left side of the outer tube 4.

[0048] This embodiment can provide auxiliary support for the smart water meter body 100 when it is placed, eliminating the need for temporary hand support during placement, improving ease of use, and allowing for flexible adjustment of the auxiliary support height according to different smart water meter bodies 100.

[0049] The usage method of this embodiment is as follows: Unlike Embodiment 1, it also has the following functions: The T-shaped support 401 provides auxiliary support at the bottom when placing the smart water meter body 100, facilitating better placement and eliminating the need for temporary hand support during placement. Reversing the knob bolt 402 to separate it from the T-shaped support 401 to the left allows the T-shaped support 401 to be moved upwards or downwards to adjust its height. Reversing the knob bolt 402 to press and lock the T-shaped support 401 to the right allows for flexible adjustment of the auxiliary support height according to different smart water meter bodies 100, further improving applicability.

[0050] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A leak detection device for smart water meters, comprising a U-shaped support plate (1), characterized in that: include: The U-shaped support plate (1) has a PLC controller (101) fixedly installed on its left side; The extrusion sealing connection assembly consists of two sets. The extrusion sealing connection assembly located on the right side is fixedly installed on the inner right side wall of the U-shaped support plate (1). The right end of the extrusion sealing connection assembly located on the right side is connected to and fixed with a digital pressure gauge (206). A Z-shaped tube (203) is connected to the left end of the extrusion connection assembly fixed on the left side. The left end of the Z-shaped tube (203) is connected to a one-way valve (204) with an outlet on the right side. The left end of the one-way valve (204) is connected to a delivery pipe (205). The side-pressure transverse drive assembly is installed between the left side of the U-shaped support plate (1) and the left side of the left-side extrusion sealing connection assembly, and is electrically connected to the PLC controller (101).

2. The water leakage detection device for a smart water meter according to claim 1, characterized in that: The extrusion sealing assembly includes a pressure box (2), a connecting tube (201), and a sealing ring (202). The two pressure boxes (2) are both open on the side closest to each other. The pressure box (2) on the right is fixedly connected to the inner wall of the right side of the U-shaped support plate (1). The two connecting tubes (201) are respectively embedded and fixed on the inner wall of the corresponding pressure box (2) away from its opening. The outer edges of the two connecting tubes (201) are integrally provided on the outer side of the side closest to each other. The two outer edges are respectively fixed to the inner wall of the corresponding pressure box (2) away from its opening on the side where they are repulsive. The two sealing rings (202) are respectively bonded and fixed on the side of the two outer edges that are close to each other. The right end of the connecting tube (201) on the right is set as a sealing structure. The digital pressure gauge (206) is fixedly installed on the right end of the connecting tube (201) on the right, and its detection end extends into the connecting tube (201) on the right. The left end of the connecting tube (201) on the left is connected and fixed to the right end of the Z-shaped tube (203).

3. The water leakage detection device for a smart water meter according to claim 2, characterized in that: The side-pressure transverse drive assembly includes a support sleeve (3), a digital pressure sensor (301), a T-shaped guide rod (303), a movable seat (302), and an electric telescopic rod (304). The right side of the support sleeve (3) is fixedly connected to the left side of the pressure box (2). The top and right side of the support sleeve (3) are both open. The digital pressure sensor (301) is fixedly connected to the left side of the support sleeve (3), and the movable seat (302) is fixedly installed on the left side of the digital pressure sensor (301). The electric telescopic rod (304) is embedded and fixed on the left inner wall of the U-shaped support plate (1), and its extended end is fixedly connected to the left side of the movable seat (302). There are four T-shaped guide rods (303) which are fixedly connected to the left side of the support sleeve (3) in a rectangular shape. The movable seat (302) and the U-shaped support plate (1) are slidably sleeved on the four T-shaped guide rods (303). The electric telescopic rod (304) and the digital pressure sensor (301) are electrically connected to the PLC controller (101) through wires.

4. The leak detection device for a smart water meter according to claim 1, characterized in that: The delivery pipe (205) is an explosion-proof hose used to connect to external water supply equipment.

5. The leak detection device for a smart water meter according to claim 3, characterized in that: The left side of the movable seat (302) and the left inner wall of the U-shaped support plate (1) are provided with four rectangular horizontal guide holes, which are slidably sleeved on the corresponding T-shaped guide rods (303).

6. The leak detection device for a smart water meter according to claim 1, characterized in that: An adjustable support assembly is installed on the bottom inner wall of the U-shaped support plate (1). The adjustable support assembly includes an outer tube (4), a T-shaped support (401), and a knob bolt (402). The outer tube (4) is embedded and fixed on the bottom inner wall of the U-shaped support plate (1). The lower part of the T-shaped support (401) is slidably sleeved in the outer tube (4). The right end of the knob bolt (402) is pressed against the lower left side of the T-shaped support (401) and threadedly connected to the outer tube (4).

7. A leak-proof detection device for a smart water meter according to claim 6, characterized in that: The outer tube (4) has a threaded hole on its left side that is threaded to be connected to the knob bolt (402).

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