Water meter with double loops

Abstract

The invention discloses a double-loop water meter which comprises a meter body with a double-meter-core structure. The number of the connecting pipelines is two, and the two connecting pipelines are independently connected to the bottom of the meter body; one end of each connecting pipeline is connected with a water inlet end water inlet and a water return end water outlet, the other end of each connecting pipeline is connected with a water inlet end water outlet and a water return end water inlet, and the water return end water inlet, one connecting pipeline and the water return end water outlet form a water return part. The water inlet end water outlet, the other connecting pipeline and the water inlet end water inlet form a water inlet part; through the design, in the aspect of moisture prevention, a layer of waterproof barrier is constructed around the exterior of the circuit board, invasion of external moisture is effectively isolated, meanwhile, the sealing rubber strip is arranged at the connecting position of the acrylic sealing plate and the meter body, the overall moisture prevention performance is further enhanced, and the service life of the circuit board is prolonged. According to the design, the circuit board can be effectively prevented from breaking down due to damp, and the service life of the water meter is greatly prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of dual-circuit water meters, and in particular relates to a water meter with dual circuits. Background Art

[0002] The dual-circuit smart water meter for direct drinking water is an advanced metering tool designed specifically for direct drinking water systems. This water meter adopts a dual-circuit design, which can monitor and record the inlet and return water flow in the direct drinking water system respectively, ensuring accurate measurement and management of water use. It integrates modern sensing technology, microelectronics technology and smart IC card technology, which can not only display water consumption in real time, but also automatically calculate water charges, and realize remote meter reading and data management. In addition, the dual-circuit smart water meter has water-saving and leak-proof functions, which can monitor water use in real time, warn of abnormal conditions such as water leakage, and ensure the safe and efficient operation of the direct drinking water system. This water meter plays an important role in improving the efficiency of water resource utilization and optimizing water management.

[0003] Direct drinking water technology uses advanced pipe network technology to deliver pure water directly to residents' homes. However, the function of ordinary water meters is limited to simply measuring water flow. Its circulation mechanism stops at the front end of the water meter and cannot cover all the pipes from the water meter to the household faucet. When some households are uninhabited for a long time, the static direct drinking water in the pipe lacks flow and may breed harmful bacteria. When used later, its water quality can no longer meet the direct drinking requirements. Moreover, the water meters on the current market are incapable of monitoring micro-leakages, and lack the ability to warn and handle serious water leaks. This is undoubtedly a great waste of water resources.

[0004] The existing dual-circuit water meter is designed to realize the control of the water circuit opening and closing valve, the recharge operation and the intuitive display of the power shortage status through the coordinated work of the precision circuit board and the display screen inside, which provides great convenience for users. However, although the circuit board is cleverly placed inside the dual-circuit water meter, this design still cannot completely avoid the tiny gas communication channels between it and the external environment. Although these channels are small, they may become potential paths for moisture penetration during actual use, exposing the circuit board to the risk of moisture.

[0005] Once the circuit board is damp, its performance may be seriously affected, or even cause failure or damage. In addition, due to the limited size of these gas channels, while protecting the circuit board from external damage, they also limit the effective heat dissipation of the circuit board. Under long-term high-load operation, the circuit board may overheat due to heat accumulation, which not only reduces its working efficiency, but also poses a serious risk of burning the circuit board.

[0006] Therefore, how to protect the circuit board from external moisture while achieving efficient heat dissipation has become a key issue that needs to be urgently solved in the current design of dual-circuit circulation water meters. Summary of the invention

[0007] The object of the present invention is to provide a water meter with a double circuit to solve the problems in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: a water meter with a double circuit, comprising

[0009] The watch body has a double movement structure;

[0010] There are two connecting pipes, and the two connecting pipes are independently connected to the bottom of the meter body;

[0011] One end of the two connecting pipes is respectively connected to the water inlet of the water inlet end and the water outlet of the return water end, and the other end is respectively connected to the water outlet of the water inlet end and the water inlet of the return water end, wherein the water inlet of the return water end, one of the connecting pipes, and the water outlet of the return water end constitute the water return part, and the water outlet of the water inlet end, the other connecting pipe, and the water inlet of the water inlet end constitute the water inlet part;

[0012] The water meter pipe section between the water inlet and the water outlet of the water inlet end and the water meter pipe section between the water inlet and the water outlet of the return end are both provided with controllable valves; a pressure transmitter is also installed in the meter body, the pressure transmitter is connected with the water inlet of the water inlet end, and a main controller is also arranged in the meter body, the controllable valve opens after receiving the cut-off command of the main controller, and closes the channel in the water inlet of the water inlet end, and the pressure transmitter monitors the water pressure in the water inlet of the water inlet end in real time;

[0013] The two ends of the water inlet and the water outlet are connected with water inlet pipes, the two ends of the water outlet and the water inlet are connected with return pipes, and a drinking water point is also installed on the common end of the return pipe and the water inlet pipe.

[0014] Preferably, when the drinking water point is not opened, the controllable valve on the water meter pipe between the water inlet at the water inlet end and the water outlet at the water inlet end is closed. When the drinking water point is opened, the pressure in the pipe drops instantly, and the main controller controls the controllable valve at this position to open, and the user uses water normally. When the water consumption exceeds the preset value, the water inlet controllable valve is closed and continues for a period of time according to the preset value, and then the alarm is lifted and water is used normally. When the water consumption exceeds the preset value for multiple consecutive times, the controllable valve on the water meter pipe between the water inlet at the water inlet end and the water outlet at the water inlet end is completely closed.

[0015] Preferably, the pressure in the water inlet of the water inlet end drops, the pressure transmitter transmits a signal to the main controller, and opens the water inlet controllable valve to replenish water. After the pressure rises to the preset value, a delay wait is performed. No new water flow is detected during the waiting time, that is, there is no flow accumulation in the water inlet meter core, and the water inlet controllable valve is closed. If water flows, the meter core has flow accumulation, which is normal water use. After the water flow stops, the test is repeated at a preset time. After three consecutive tests, there is still no flow accumulation in the meter core, and the pressure in the water inlet of the water inlet end slowly drops to below the preset value. It is determined to be a pipeline leak or a deliberate water theft by the user, and an alarm message is sent and the controllable valve on the water meter pipeline between the water inlet of the water inlet end and the water outlet of the water inlet end is completely closed.

[0016] Preferably, a display module is further provided inside the watch body, a circuit board is provided directly below the display module, and pins of the display module are connected to the circuit board; a protective component is provided above the display module, and a ring groove for placing the protective component is reserved at the top of the inner part of the watch body;

[0017] It also includes a heat dissipation component; the heat dissipation component is composed of a functional part and a heat-conducting part, wherein one end of the functional part is connected with the protective component, and the other end extends obliquely toward the bottom of the watch body and passes through the side of the watch body to the outside, and the heat-conducting part is installed at the bottom end of the circuit board and connected to the functional part; the protective component includes a transparent acrylic sealing plate, which is in contact with or separated from the display module.

[0018] Preferably, an integrated water retaining frame is formed on the top of the acrylic sealing plate, and the inner area of ​​the water retaining frame coincides with the vertical projection area of ​​the display module;

[0019] Preferably, the top of the water retaining frame fits with the top end surface of the annular groove of the meter body.

[0020] Preferably, a slot is provided at the top of the water retaining frame, and a sealing strip is embedded in the slot, the sealing strip abuts against the inner top surface of the meter body; a cover plate is also installed at the outer top of the meter body.

[0021] Preferably, a plurality of screw holes are provided on the top end surface inside the table body, and a limiting bolt is screwed into each screw hole, and the limiting bolt abuts against the acrylic sealing plate.

[0022] Preferably, the heat conducting part comprises a heat conducting plate mounted on the bottom end of the circuit board, and a heat conducting sheet is also mounted on the heat conducting plate. The heat conducting sheet is spiral-shaped and wound around the functional part.

[0023] Preferably, the functional component is a drain pipe, the top of which passes through the top end surface of the acrylic sealing plate, and the top ends of the two are in the same plane, and the drain pipe is in the inner area of ​​the water retaining frame, and the bottom end of the drain pipe extends through the outside, the heat conductive sheet is wrapped around the drain pipe, and the drain pipe is connected to the circuit board.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Through the design of the present invention, a return pipe is used to circulate the water in the pipeline from the water meter to the faucet, so as to avoid the formation of stagnant water to breed bacteria and affect the health of users. Under the detection of the meter core and the pressure transmitter, the control function of the water inlet controllable valve is utilized to form a water leakage alarm valve closing function and a drip alarm valve closing function, thereby preventing the risk of water waste caused by pipeline damage or the faucet in the user's home not being closed, preventing accidental pipeline leakage, and the problem of users deliberately stealing water;

[0026] In terms of moisture-proof, a waterproof barrier is built around the outside of the circuit board to effectively isolate the intrusion of external moisture. At the same time, a sealing strip is set at the connection between the acrylic sealing plate and the meter body to further enhance the overall moisture-proof performance. This design can not only effectively prevent the circuit board from malfunctioning due to moisture, but also greatly extend the service life of the water meter;

[0027] In terms of heat dissipation, a heat conductive plate is set on the back of the circuit board, which is combined with a heat conductive sheet and a drain pipe to achieve rapid conduction and dissipation of heat from the circuit board. In addition, with the help of flowing gas outside that is lower than the temperature of the circuit board, an air duct is formed inside the water meter, allowing the external air to flow smoothly through the heat conductive sheet, thereby taking away the heat from the circuit board. This design not only improves the heat dissipation efficiency, but also ensures the stability of the circuit board under long-term high-load operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the connection between the water meter and the return pipe and the water inlet pipe of the present invention;

[0029] Figure 2 It is a schematic diagram of the position of the controllable valve inside the water meter of the present invention;

[0030] Figure 3 It is a schematic diagram of the explosion of the water meter of the present invention;

[0031] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the middle A area;

[0032] Figure 5 It is a schematic diagram of the structure of the circuit board, acrylic sealing plate and cover plate of the present invention when viewed from above;

[0033] Figure 6 For the present invention Figure 3 A magnified schematic diagram of the middle B area;

[0034] Figure 7 The figure is a schematic diagram of the installation of the meter body and the circuit board of the present invention when viewed from above;

[0035] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of area C in the middle.

[0036] In the figure:

[0037] 100, meter body; 101, pressure transmitter; 102, controllable valve; 103, cover plate; 104, display module; 105, circuit board; 106, acrylic sealing plate; 107, sealing strip; 108, water retaining frame; 108a, card slot; 109, heat conducting sheet; 110, drain pipe; 111, heat conducting plate; 112, screw hole;

[0038] 200. Connecting pipelines;

[0039] 201, water outlet at the return end; 202, water inlet at the inlet end; 203, water inlet at the return end; 204, water outlet at the inlet end;

[0040] 300, limit bolt;

[0041] 400, water return pipe; 401, drinking water point;

[0042] 500. Water inlet pipe. DETAILED DESCRIPTION

[0043] 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.

[0044] See also Figures 1 to 8 The present invention provides a technical solution: a water meter with a double circuit, comprising

[0045] The watch body 100 has a double watch movement structure;

[0046] There are two connecting pipes 200, and the two connecting pipes 200 are independently connected to the bottom of the meter body 100;

[0047] One end of the two connecting pipes 200 is respectively connected to the water inlet 202 of the water inlet end and the water outlet 201 of the water return end, and the other end is respectively connected to the water outlet 204 of the water inlet end and the water inlet 203 of the water return end, wherein the water inlet 203 of the water return end, one of the connecting pipes 200, and the water outlet 201 of the water return end constitute the water return part, and the water outlet 204 of the water inlet end, the other connecting pipe 200, and the water inlet 202 of the water inlet end constitute the water inlet part;

[0048] The water meter pipe section between the water inlet 202 and the water outlet 204 at the water inlet end and the water meter pipe section between the water inlet 203 and the water outlet 201 at the return end are both provided with controllable valves 102, and the controllable valves 102 are used to block the internal cavities of the water outlet 201 and the water inlet 202 at the return end, thereby cutting off and unblocking the water flow, so as to complete the water inlet and return, and cut off the water inlet and return operations according to actual use requirements; a pressure transmitter 101 is also installed in the meter body 100, and the pressure transmitter 101 is connected to the water inlet 202 at the water inlet end, and a main controller is also provided in the meter body 100, and the controllable valve 102 opens after receiving the cut-off command from the main controller, and closes the channel in the water inlet 202 at the water inlet end, and the pressure transmitter 101 monitors the water pressure in the water inlet 202 at the water inlet end in real time;

[0049] In this embodiment, the two meter cores are respectively located on the section of the water meter pipe between the water inlet 202 and the water outlet 204 at the water inlet end and the section of the water meter pipe between the water inlet 203 and the water outlet 201 at the return water end. The meter core on the section of the water meter pipe between the water inlet 202 and the water outlet 204 at the water inlet end is the water inlet meter core, and the meter core on the section of the water meter pipe between the water inlet 203 and the water outlet 201 at the return water end is the water return meter core.

[0050] In this embodiment, when the drinking water point 401 is not opened, the controllable valve 102 on the water meter pipe section between the water inlet 202 at the water inlet end and the water outlet 204 at the water inlet end is closed, that is, the controllable valve 102 on the water meter pipe section between the water inlet 202 at the water inlet end and the water outlet 204 at the water inlet end is a water inlet controllable valve; when the drinking water point 401 is opened, the pressure in the pipe drops instantly, and the main controller controls the controllable valve 102 at this position to open, and the user uses water normally; when the water consumption exceeds the preset value, the water inlet controllable valve 102 is closed, and continues for a period of time according to the preset value, and then the alarm is lifted and water is used normally, and when the water consumption exceeds the preset value for multiple consecutive times, the controllable valve 102 on the water meter pipe between the water inlet at the water inlet end and the water outlet at the water inlet end is completely closed, and the specific anti-water leakage function is as follows:

[0051] The user's water consumption is measured and counted through the water inlet meter core. A normal large barrel of water has a capacity of 18L, and the protection value can be set to 20L. When the continuous water consumption exceeds the preset value, it is temporarily determined that the user's home is leaking water, and the water inlet controllable valve 102 is closed for the first time. The duration is m seconds after the valve is closed, and the alarm is automatically lifted, and the user can still use water. When the continuous water consumption exceeds 20L again, the water inlet controllable valve is closed again and the alarm is sounded. This is repeated three times in a row and is determined to be a water leak. The controllable valve 102 on the water meter pipe between the water inlet and the water outlet at the water inlet end is completely closed, and an alarm message is sent to the user's mobile phone. After confirming that the water is manually released or has returned to normal, the closure is lifted, thereby realizing the water leak alarm function, which can prevent the risk of water waste caused by pipe damage or when the faucet in the user's home is not closed.

[0052] 102 , the pressure in the water inlet 202 at the water inlet end drops, the pressure transmitter 101 transmits a signal to the main controller, and opens the water inlet controllable valve 102 to replenish water. After the pressure rises to a preset value, a delay is made to wait. When no new water flow is detected during the waiting time, that is, there is no flow accumulation in the water inlet meter core, the controllable valve 102 on the water meter pipe between the water inlet and the water outlet at the water inlet end is closed. If water flows through, the meter core has flow accumulation, which is normal water use. After the water flow stops, the preset time is re-tested. After three consecutive tests, there is no flow accumulation in the meter core. When the pressure in the water inlet 202 at the water inlet end slowly drops below the preset value, it is determined to be a pipeline leak or intentional water theft by the user, and an alarm message is sent and the controllable valve 102 on the water meter pipe between the water inlet and the water outlet at the water inlet end is completely closed. Specifically, when there is a pipeline leak or intentional water theft by the user, the pressure in the water inlet 202 at the water inlet end is The pressure decreases, when the pressure in the water inlet 202 slowly drops below 0.053MPa, the pressure transmitter 101 transmits a signal to the main controller, opens the controllable valve 102 on the water meter pipe between the water inlet and the water outlet of the water inlet, and replenishes water. After the pressure rises to above 0.1MPa, it delays for 5s. No new water flow is detected within 5s, that is, the water inlet meter core has no flow accumulation, and the water inlet controllable valve 102 is closed. If water flows and the meter core has flow accumulation, this situation is normal water use by the user. After 5s after the water flow stops, re-detection is performed. After three consecutive detections, there is no flow accumulation in the meter core, but the pressure in the water inlet 202 slowly drops below 0.053MPa, it can be determined as pipeline leakage or intentional water theft by the user. At this time, an alarm message can be sent and the water inlet controllable valve 102 can be completely closed, thereby forming a drip alarm valve closing, which can prevent accidental pipeline leakage or intentional water theft by the user.

[0053] In this embodiment, a display module 104 is further provided inside the watch body 100, and a circuit board 105 is provided directly below the display module 104, and the pins of the display module 104 are connected to the circuit board 105; a protective component is provided above the display module 104, and a ring groove for placing the protective component is reserved at the top of the inner part of the watch body 100;

[0054] The heat dissipation component is also included; the heat dissipation component is composed of a functional part and a heat conduction part, wherein one end of the functional part is connected to the protective component through, and the other end is inclined to extend toward the bottom direction of the watch body 100 and penetrates from the side of the watch body 100 to the outside, so that the water source on the top of the protective component can be discharged, and the heat conduction part is installed at the bottom end of the circuit board 105 and connected to the functional part. In use, the heat of the heat conduction part can be reduced by the functional part, so as to achieve the purpose of heat dissipation; the protective component includes a transparent acrylic sealing plate 106, which is connected to the display module 104 The acrylic sealing plate 106 is in a fitted or separated state to avoid abutting against each other and affecting the normal operation of the display module 104. An integrated water retaining frame 108 is also formed on the top of the acrylic sealing plate 106. The internal area of ​​the water retaining frame 108 coincides with the vertical projection area of ​​the display module 104. Through this area, normal observation of the values ​​on the display module 104 can be guaranteed. The top of the water retaining frame 108 fits with the top surface of the annular groove of the watch body 100, and the annular groove position is sealed and separated to achieve water vapor isolation, thereby preventing water vapor from entering the interior of the watch body 100 through the gap between the watch body 100 and the display module 104.

[0055] In this embodiment, a slot 108a is provided at the top of the water retaining frame 108, and a sealing strip 107 is embedded in the slot 108a. The sealing strip 107 is against the inner top surface of the meter body 100, thereby ensuring that water vapor in the inner area of ​​the water retaining frame 108 will not pass through the water retaining frame 108 and be conducted to the inside of the meter body 100. In actual use, the end face of the sealing strip 107 is selected to be a circular structure. In the subsequent extrusion, it can be deformed and pressed against the annular groove on the meter body 100 to achieve a sealing effect; a cover plate 103 is also installed on the outer top of the meter body 100.

[0056] In this embodiment, a plurality of screw holes 112 are provided on the internal top surface of the meter body 100, wherein the screw hole 112 is a hole-shaped structure with a notch, and a limiting bolt 300 is screwed into each screw hole 112. During installation, a portion of the limiting bolt 300 is always outside the screw hole 112, and the area outside the screw hole 112 is used to abut against the acrylic sealing plate 106. The limiting bolt 300 abuts against the acrylic sealing plate 106, thereby achieving the installation of the acrylic sealing plate 106, and at the same time, it can also force the water retaining frame 108 to press against the internal top surface of the meter body 100, wherein the pressing force is limited by the limiting bolt 300 and the depth of the screw hole 112.

[0057] In this embodiment, the heat conduction part includes a heat conduction plate 111 installed at the bottom end of the circuit board 105. A heat conduction sheet 109 is also installed on the heat conduction plate 111. The heat conduction sheet 109 is spirally shaped and wound around the functional part. The heat of the circuit board 105 is adsorbed by the heat conduction plate 111 and transmitted to the functional part through the heat conduction sheet 109. The heat conduction sheet 109 is then cooled by the functional part, thereby achieving the purpose of heat dissipation of the circuit board 105.

[0058] In this embodiment, the functional part is a drain pipe 110, the top of which passes through the top end surface of the acrylic sealing plate 106, and the top ends of the two are in the same plane, and the drain pipe 110 is in the inner area of ​​the water retaining frame 108. Therefore, when there is water accumulation in the water retaining frame 108, the water flow can be discharged through the drain pipe 110. At this time, the temperature of the drain pipe 110 passing through the accumulated water is relatively low, and the heat conductive sheet 109 wrapped around itself can be cooled. The bottom end of the drain pipe 110 extends through the outside of 100, so that the accumulated water can be discharged. When there is no accumulated water, the position of the drain pipe 110 can form a channel for external wind to pass through, and the heat conductive sheet 109 can be cooled by the flow of external air, thereby helping to improve the heat dissipation efficiency of the circuit board 105. The heat conductive sheet 109 is wrapped around the drain pipe 110, and the drain pipe 110 is connected to the circuit board 105.

[0059] In this embodiment, the two ends of the water inlet 202 and the water outlet 204 at the water inlet end are connected with a water inlet pipe 500, and the two ends of the water outlet 201 and the water inlet 203 at the return end are connected with a water return pipe 400. The end of the water return pipe 400 is connected to the water inlet pipe 500. When drinking water, the water source is transmitted to the position of the drinking point 401 through the water inlet 202, the connecting pipe 200, and the water outlet 204 at the water inlet end in sequence through the water inlet pipe 500. The drinking point 401 is opened to realize normal drinking. After drinking water, the drinking point 401 is closed. At this time, the interior of the water inlet pipe 500 has static water. When the user does not use it for a long time, a water return operation is required. The water source inside the water inlet pipe 500 is circulated through the return water inlet 203, the connecting pipe 200, and the return water outlet 201 through the return water pipe 400, so as to avoid the problem of dead water. When the water source passes through the water inlet pipe 500 through the meter body 100, and then passes through the meter body 100 through the return water pipe 400, the meter body 100 will display the result of subtracting the return water amount from the inlet water amount, thereby indicating the final water consumption. A drinking water point 401 is also installed at the end of the water inlet pipe 500, and normal drinking water is achieved through the drinking water point 401.

[0060] In this embodiment, a filter is provided on the water inlet 202 at the water inlet end, and the water source is filtered through the filter to ensure the safety of subsequent drinking.

[0061] Although embodiments of the present invention have been shown and described (see the above detailed description for details), it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water meter with dual circuits, characterized in that: include The watch body has a double movement structure; There are two connecting pipes, and the two connecting pipes are independently connected to the bottom of the meter body; One end of the two connecting pipes is respectively connected to the water inlet of the water inlet end and the water outlet of the return water end, and the other end is respectively connected to the water outlet of the water inlet end and the water inlet of the return water end, wherein the water inlet of the return water end, one of the connecting pipes, and the water outlet of the return water end constitute the water return part, and the water outlet of the water inlet end, the other connecting pipe, and the water inlet of the water inlet end constitute the water inlet part; The water meter pipe section between the water inlet and the water outlet of the water inlet end and the water meter pipe section between the water inlet and the water outlet of the return end are both provided with controllable valves; a pressure transmitter is also installed in the meter body, the pressure transmitter is connected with the water inlet of the water inlet end, and a main controller is also arranged in the meter body, the controllable valve opens after receiving the cut-off command of the main controller, and closes the channel in the water inlet of the water inlet end, and the pressure transmitter monitors the water pressure in the water inlet of the water inlet end in real time; The two ends of the water inlet and the water outlet are connected with water inlet pipes, the two ends of the water outlet and the water inlet are connected with return pipes, and a drinking water point is also installed on the common end of the return pipe and the water inlet pipe.

2. A water meter with a dual circuit according to claim 1, characterized in that: When the drinking water point is not opened, the controllable valve on the water meter pipe between the water inlet and the water outlet at the water inlet is closed. When the drinking water point is opened, the pressure in the pipe drops instantly, and the main controller controls the controllable valve at this position to open, and the user uses water normally. When the water consumption exceeds the preset value, the water inlet controllable valve is closed and lasts for a period of time according to the preset value, and then the alarm is lifted and water is used normally. When the water consumption exceeds the preset value for multiple consecutive times, the controllable valve on the water meter pipe between the water inlet and the water outlet at the water inlet is completely closed.

3. A water meter with dual circuits according to claim 1, characterized in that: When the pressure in the water inlet of the water inlet end drops, the pressure transmitter transmits a signal to the main controller and opens the water inlet controllable valve to replenish water. After the pressure rises to the preset value, the waiting time is delayed. No new water flow is detected during the waiting time, that is, the water inlet meter core has no flow accumulation, and the water inlet controllable valve is closed. If water flows, the meter core has flow accumulation, which is normal water use. After the water flow stops, the test is repeated at a preset time. After three consecutive tests, there is still no flow accumulation in the meter core, and the pressure in the water inlet end slowly drops to below the preset value, it is determined to be a pipeline leak or the user deliberately stealing water, and an alarm message is sent and the water inlet controllable valve is completely closed.

4. A water meter with dual circuits according to claim 1, characterized in that: A display module is also arranged inside the watch body, a circuit board is arranged directly below the display module, and the pins of the display module are connected to the circuit board; a protection component is arranged above the display module, and a ring groove for placing the protection component is reserved at the top of the inner part of the watch body; It also includes a heat dissipation component; the heat dissipation component is composed of a functional part and a heat-conducting part, wherein one end of the functional part is connected with the protective component, and the other end extends obliquely toward the bottom of the watch body and passes through the side of the watch body to the outside, and the heat-conducting part is installed at the bottom end of the circuit board and connected to the functional part; the protective component includes a transparent acrylic sealing plate, which is in contact with or separated from the display module.

5. A water meter with dual circuits according to claim 4, characterized in that: An integrated water retaining frame is also formed on the top of the acrylic sealing plate, and the inner area of ​​the water retaining frame coincides with the vertical projection area of ​​the display module.

6. A water meter with dual circuits according to claim 5, characterized in that: The top of the water retaining frame is in contact with the top surface of the annular groove of the meter body.

7. A water meter with dual circuits according to claim 5, characterized in that: A slot is provided on the top of the water retaining frame, and a sealing strip is embedded in the slot, and the sealing strip abuts against the inner top surface of the meter body; a cover plate is also installed on the outer top of the meter body.

8. A water meter with dual circuits according to claim 5, characterized in that: A plurality of screw holes are provided on the top end surface of the inner part of the meter body, and a limiting bolt is screwed into each screw hole, and the limiting bolt abuts against the acrylic sealing plate.

9. A water meter with dual circuits according to claim 4, characterized in that: The heat-conducting part comprises a heat-conducting plate installed at the bottom end of the circuit board, and a heat-conducting sheet is also installed on the heat-conducting plate. The heat-conducting sheet is spiral-shaped and wound around the functional part.

10. A water meter with dual circuits according to claim 9, characterized in that: The functional part is a drain pipe, the top of which penetrates through the top end surface of the acrylic sealing plate, and the top ends of the two are in the same plane, and the drain pipe is in the inner area of ​​the water retaining frame, and the bottom end of the drain pipe extends through the outside, the heat conductive sheet is wrapped around the drain pipe, and the drain pipe is connected to the circuit board.

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