Two-way water meter with pressure sensor

Abstract

The invention discloses a double-path circulation intelligent water meter with a pressure sensor, and relates to the technical field of water meters, the double-path circulation intelligent water meter comprises a water meter body, the water meter body is provided with a water inlet pipeline and a water return pipeline, and the double-path circulation intelligent water meter further comprises a pressure sensor body installed in the water meter body and used for detecting the pressure of the water inlet pipeline; the water inlet pipeline and the water return pipeline are provided with a first controllable valve and a second controllable valve which are used for opening and closing control respectively. In the process that the pressure sensor body is used for monitoring the pressure in the pipeline in real time, the cleaning effect on the detection head is guaranteed through the cleaning assembly, accurate measurement of the pressure sensor body on the pressure in the water meter pipeline is facilitated by effectively cleaning the detection head, and after cleaning is completed, the second controllable valve is opened, so that the pressure in the water meter pipeline is accurately measured. Internal water polluted in the cleaning process flows back to the water return pipeline and flows back to the direct drinking water equipment to be treated, and direct drinking is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent water meters, in particular to a dual-circulation intelligent water meter with a pressure sensor. Background Art

[0002] A water meter is a measuring instrument used to measure the flow of water through a closed pipe. By recording the flow of water, the water meter can provide metering data to the water supply department for the calculation of water charges, and also help users understand their water usage.

[0003] During the use of the water meter, the pressure of the transported water is monitored in real time through the sensor inside the water meter. During the monitoring process, as time goes by, impurities in the water (such as mud, rust, microorganisms, etc.) may adhere to the sensitive components of the pressure sensor. These impurities will change the sensing characteristics of the detection head on the pressure sensor, resulting in measurement errors. For this reason, we propose a dual-channel water meter with a pressure sensor. Summary of the invention

[0004] The object of the present invention is to provide a dual-channel water meter with a pressure sensor to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a dual-channel water meter with a pressure sensor, comprising a water meter body, on which a water inlet pipeline and a water return pipeline are arranged; and further comprising:

[0006] A pressure sensor body installed inside the water meter body for detecting the pressure of the water inlet pipeline, the water inlet pipeline includes a water inlet pipe, and the two ends of the water inlet pipe are respectively provided with a water inlet inlet and a water inlet outlet, the return water pipeline includes a return water pipe, and the two ends of the return water pipe are respectively provided with a return water inlet and a return water outlet, and the water inlet outlet and the return water inlet are connected to each other at the user's end faucet by a three-way pipe;

[0007] The water inlet pipeline and the water return pipeline are respectively installed with a first controllable valve and a second controllable valve for opening and closing control;

[0008] When the dual-circuit water meter is in use, when the water consumption reaches the preset value within the set time, the second controllable valve is kept closed to avoid dead water in the water inlet pipe. When no water is used within the set time, the second controllable valve is opened to circulate the water accumulated in the water inlet pipe to avoid dead water pollution.

[0009] The water meter body is provided with two sets of first and second meter cores for measuring the flow of the water inlet pipe and the water return pipe respectively;

[0010] The pressure sensor body includes a mounting seat for auxiliary positioning and installation and a detection rod for auxiliary detection. The front end of the detection rod is provided with a detection head for auxiliary detection. An annular cover is fixed to the lower end of the mounting seat. The detection rod is located inside the annular cover. An annular plate is provided between the detection rod and the annular cover. A first rotating component for assisting the rotatable connection of the annular plate and a driving component for driving the annular plate are provided between the annular plate and the annular cover. A cleaning component for cleaning the detection head is provided on the annular plate.

[0011] The water meter body is provided with two sets of first and second meter cores for respectively measuring the flow of the water inlet pipeline and the water return pipeline. During the use of the water meter, when the faucet drips, the pressure in the water meter body decreases. When the pressure is lower than the preset threshold, the first controllable valve is opened to add water to the pipeline. When the pressure in the water meter body is higher than the preset threshold, a delay of n seconds is performed. If no new water flow is detected within n seconds, the first controllable valve is closed. If water flows, the timing is restarted after n seconds. If the pressure in the water meter body decreases for three consecutive times, it is determined to be a pipeline dripping or a user intentionally stealing water. An alarm message is sent and the first controllable valve is closed. After confirming that the water is manually released or has returned to normal, the valve is released to form a dripping or intentional water theft alarm function.

[0012] The cleaning components are provided with two groups, and the two groups of cleaning components are arranged in a symmetrical state. The cleaning components include a mounting frame, the mounting frame is connected and fixed to the annular plate by a connecting frame, a mounting sleeve is fixed to one end of the mounting frame, a circular plate is rotatably connected inside the mounting sleeve, an operating rod is provided between the circular plate and the detection rod, a telescopic component for assisting the telescopic connection of the operating rod is provided between the operating rod and the circular plate, a friction block for rubbing against the surface of the detection head is fixed to the upper end of the operating rod, a second rotating component for rotating the circular plate is provided on the mounting frame, a transmission component for transmitting the second rotating component is provided between the mounting frame and the outer side of the detection rod, and a conical surface for transmitting against the detection head is provided on the outer side of the operating rod.

[0013] The telescopic assembly comprises a plurality of sleeves fixed to the lower end of the operating rod, a sliding rod is slidably connected to the sleeve, one end of the sliding rod is fixed to the circular plate, and a spring is sleeved on the outer side of the sleeve.

[0014] The second rotating assembly includes a first gear fixed to the lower end of the circular plate, a second gear is arranged below the mounting frame, and the first gear and the second gear are meshed with each other.

[0015] The transmission assembly includes a rotating shaft rotatably connected to the mounting frame, one end of the rotating shaft is fixed to the second gear, the other end of the rotating shaft is fixed to the third gear, the outer side of the detection rod is sleeved with a first gear ring, and the third gear and the first gear ring are meshed with each other.

[0016] The first rotating assembly includes an annular groove opened on the outer side of the annular plate, the interior of the annular groove is rotatably connected with a rotating ring, and the rotating ring is fixed inside the annular cover.

[0017] The cross sections of the annular groove and the rotating ring are arranged in a T shape.

[0018] The driving assembly includes a second gear ring fixed to the upper end of the annular plate, a support frame is fixed inside the annular cover, a mounting shaft is rotatably connected to the support frame, a fourth gear is fixed to one end of the mounting shaft, the fourth gear and the second gear ring are meshed with each other, and a driving motor for rotating the mounting shaft is installed on the support frame.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When the water meter of the present invention is in use, the water accumulated in the water inlet pipe is circulated and refluxed through the cooperation between the water inlet pipe and the water return pipe and the first controllable valve and the second controllable valve, thereby effectively avoiding the pollution problem of dead water;

[0021] 2. When the water meter of the present invention is in use, the pressure sensor and other components cooperate with each other to determine whether the pipe is leaking or the user is intentionally stealing water, send an alarm message and close the first controllable valve, so as to identify the leakage of the smart water meter and perform an alarm operation;

[0022] 3. In the process of using the pressure sensor body to monitor the pressure inside the pipeline in real time, the cleaning component is used to ensure the cleaning effect of the detection head. Through the effective cleaning of the detection head, the pressure sensor body is convenient for accurately measuring the internal pressure of the water meter pipeline. After the cleaning is completed, the second controllable valve is opened to return the internal water contaminated during the cleaning process to the return water pipeline and return it to the direct drinking water equipment for treatment to avoid direct drinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the water return pipeline of the present invention;

[0025] Figure 3 A schematic diagram of the position relationship between the pressure sensor and the water meter of the present invention;

[0026] Figure 4The schematic diagram of the pressure sensor structure of the present invention is

[0027] Figure 5 It is a schematic diagram of the bottom structure of the pressure sensor of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the first rotating assembly and the driving assembly of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the cleaning component of the present invention;

[0030] Figure 8 This is a schematic diagram of the cleaning component of the present invention before cleaning;

[0031] Fig. 9 A schematic diagram of the cleaning component of the present invention during the cleaning process;

[0032] Fig.10 It is a schematic diagram of the transmission assembly structure of the present invention;

[0033] Fig.11 It is a schematic structural diagram of the second rotating assembly of the present invention;

[0034] Fig.12 It is a schematic diagram of the telescopic assembly structure of the present invention.

[0035] In the figure: 101, water meter body; 102, water inlet pipe; 1021, water inlet entrance; 1022, water inlet outlet; 103, water return pipe; 1031, water return entrance; 1032, water return outlet; 104, three-way pipe; 105, first meter core; 106, second meter core; 107, first controllable valve; 108, second controllable valve; 2, pressure sensor body; 201, mounting seat; 202, detection rod; 203, detection head; 3, annular cover; 4, annular plate; 501, annular groove; 50 2. rotating ring; 601. second gear ring; 602. support frame; 603. mounting shaft; 604. fourth gear; 605. driving motor; 701. mounting frame; 702. connecting frame; 703. mounting sleeve; 704. circular plate; 705. operating rod; 706. friction block; 707. conical surface; 801. sleeve; 802. sliding rod; 803. spring; 901. first gear; 902. second gear; 1001. rotating shaft; 1002. third gear; 1003. first gear ring. DETAILED DESCRIPTION

[0036] 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.

[0037] Example 1

[0038] See also Figure 1-Figure 12 The dual-circulation intelligent water meter with a pressure sensor shown in the figure includes a water meter body 101, on which a water inlet pipeline and a water return pipeline are arranged, and further includes:

[0039] A pressure sensor body 2 is installed inside the water meter body 101 for detecting the pressure of the water inlet pipeline. The water inlet pipeline includes a water inlet pipe 102, and the two ends of the water inlet pipe 102 are respectively provided with a water inlet inlet 1021 and a water inlet outlet 1022. The return water pipeline includes a return water pipe 103, and the two ends of the return water pipe 103 are respectively provided with a return water inlet 1031 and a return water outlet 1032. The water inlet outlet 1022 and the return water inlet 1031 are connected at the user's end faucet and are connected to a three-way pipe 104;

[0040] A first controllable valve 107 and a second controllable valve 108 for opening and closing control are respectively installed on the water inlet pipeline and the water return pipeline;

[0041] It should be noted here that the first controllable valve 107 and the second controllable valve 108 can respectively control the opening and closing of the water inlet pipeline and the water return pipeline;

[0042] The water meter body 101 is provided with two sets of first meter core 105 and second meter core 106 for detecting the flow of the water inlet pipe and the water return pipe respectively;

[0043] It should be noted that the flow rates of the water inlet pipe and the water return pipe can be detected respectively by the first meter core 105 and the second meter core 106;

[0044] It should be noted here that when the water meter is in use, the cooperation between the water inlet pipe and the water return pipe and the first controllable valve 107 and the second controllable valve 108 can effectively avoid the pollution problem of dead water, and can also determine the pipeline leakage or the user's intentional theft of water, so as to facilitate the more intelligent use of the water meter;

[0045] It is worth noting here that a controller and an alarm are installed inside the water meter, and the alarm, the first controllable valve 107 and the second controllable valve 108 are electrically connected to the controller, wherein the alarm, the first controllable valve 107, the second controllable valve 108 and the controller are conventional operating components in the opening and closing control and the alarm control, and are regarded as the prior art in this application and will not be described in detail;

[0046] The pressure sensor body 2 includes a mounting seat 201 for auxiliary positioning installation and a detection rod 202 for auxiliary detection. The front end of the detection rod 202 is provided with a detection head 203 for auxiliary detection. The lower end of the mounting seat 201 is fixed with an annular cover 3. The detection rod 202 is located inside the annular cover 3. An annular plate 4 is provided between the detection rod 202 and the annular cover 3. A first rotating component for assisting the rotatable connection of the annular plate 4 and a driving component for driving the annular plate 4 are provided between the annular plate 4 and the annular cover 3. A cleaning component for cleaning the detection head 203 is provided on the annular plate 4.

[0047] It should be noted here that: in the process of using the pressure sensor body 2 to monitor the pressure inside the pipeline in real time, the cleaning component is used to ensure the cleaning effect of the detection head 203. Through the effective cleaning of the detection head 203, the pressure sensor body 2 is convenient for accurately measuring the internal pressure of the water meter pipeline. After the cleaning is completed, the second controllable valve 108 is opened to return the internal water contaminated during the cleaning process to the return water pipeline and return it to the direct drinking water equipment for treatment to avoid direct drinking.

[0048] Preferably, two groups of cleaning components are provided, and the two groups of cleaning components are arranged in a symmetrical state;

[0049] It should be noted here that the cleaning effect is guaranteed by using two sets of cleaning components.

[0050] Preferably, the cleaning assembly includes a mounting frame 701, the mounting frame 701 is connected and fixed to the annular plate 4 via a connecting frame 702, a mounting sleeve 703 is fixed to one end of the mounting frame 701, a circular plate 704 is rotatably connected inside the mounting sleeve 703, an operating rod 705 is provided between the circular plate 704 and the detection rod 202, a telescopic assembly for assisting the telescopic connection of the operating rod 705 is provided between the operating rod 705 and the circular plate 704, a friction block 706 for rubbing against the surface of the detection head 203 is fixed to the upper end of the operating rod 705, a second rotating assembly for rotating the circular plate 704 is provided on the mounting frame 701, and a transmission assembly for transmitting the second rotating assembly is provided between the mounting frame 701 and the outer side of the detection rod 202;

[0051] It should be noted here that: through transmission, the friction block 706 on the operating rod 705 is abutted against the bottom of the detection head 203, and the front end of the detection head 203 is cleaned through the rotation of the operating rod 705 and the friction block 706 and the abutment between the friction block 706 and the lower end of the detection head 203. In the cleaning process, the elastic force of the telescopic component on the operating rod 705 after the contraction movement is pushed so that the friction block 706 on the operating rod 705 maintains a certain pressure and abuts against the front end of the detection head 203, thereby avoiding the presence of a gap between the detection head 203 and the friction block 706 due to the retractability of the detection head 203 itself during the cleaning process, thereby ensuring the cleaning effect of the detection head 203. Through the effective cleaning of the detection head 203, the pressure sensor body 2 is convenient for accurately measuring the internal pressure of the water meter pipeline.

[0052] Preferably, the outer side of the operating rod 705 is provided with a conical surface 707 for abutting against the detection head 203 for transmission;

[0053] It should be noted here that: during the movement of the mounting frame 701, through the connection between the mounting sleeve 703, the circular plate 704 and the telescopic assembly, the operating rod 705 is driven to rotate around the lower end of the detection rod 202 while rotating on its own. During the movement of the operating rod 705, the conical surface 707 of the operating rod 705 is abutted against the end of the detection head 203. During the abutment process, the operating rod 705 is pushed to move toward the circular plate 704 under force to retract.

[0054] Preferably, the telescopic assembly includes a plurality of sets of sleeves 801 fixed to the lower end of the operating rod 705, a slide bar 802 is slidably connected to the sleeve 801, one end of the slide bar 802 is fixed to the circular plate 704, and a spring 803 is sleeved on the outer side of the sleeve 801;

[0055] It should be noted that: the sleeve 801 and the slide rod 802 facilitate the telescopic connection between the circular plate 704 and the operating rod 705, and the spring 803 facilitates the return movement of the operating rod 705 after the contraction movement.

[0056] Preferably, the second rotating assembly includes a first gear 901 fixed to the lower end of the circular plate 704, and a second gear 902 is disposed below the mounting frame 701, and the first gear 901 and the second gear 902 are meshed with each other;

[0057] It should be noted here that: the second gear 902 is driven to rotate through the transmission assembly. During the rotation of the second gear 902, the second gear 902 and the first gear 901 are meshed with each other to drive the circular plate 704 to rotate inside the mounting sleeve 703. During the rotation of the circular plate 704, the operating rod 705 and the friction block 706 are driven to rotate through the connection of the telescopic assembly.

[0058] Preferably, the transmission assembly includes a rotating shaft 1001 rotatably connected to the mounting frame 701, one end of the rotating shaft 1001 is fixed to the second gear 902, the other end of the rotating shaft 1001 is fixed to the third gear 1002, the outer side of the detection rod 202 is sleeved with a first gear ring 1003, and the third gear 1002 and the first gear ring 1003 are meshed with each other;

[0059] It should be noted here that: during the rotation of the annular plate 4, the mounting frame 701 is driven to move synchronously through the connecting frame 702, and during the movement of the mounting frame 701, the rotating shaft 1001 is driven to move synchronously, and during the movement of the rotating shaft 1001, the rotating shaft 1001 and the second gear 902 are driven to rotate through the mutual meshing transmission between the third gear 1002 and the first ring gear 1003.

[0060] Preferably, the first rotating assembly includes an annular groove 501 opened on the outer side of the annular plate 4, and the interior of the annular groove 501 is rotatably connected with a rotating ring 502, and the rotating ring 502 is fixed inside the annular cover 3;

[0061] It should be noted here that the annular groove 501 and the rotating ring 502 facilitate the rotatable connection of the annular plate 4 .

[0062] Preferably, the cross-sections of the annular groove 501 and the rotating ring 502 are T-shaped;

[0063] It should be noted here that the cross-section of the annular groove 501 and the rotating ring 502 is T-shaped, which facilitates a more stable rotating connection.

[0064] Preferably, the driving assembly includes a second gear ring 601 fixed to the upper end of the annular plate 4, a support frame 602 is fixed inside the annular cover 3, a mounting shaft 603 is rotatably connected to the support frame 602, a fourth gear 604 is fixed to one end of the mounting shaft 603, the fourth gear 604 and the second gear ring 601 are meshed with each other, and a driving motor 605 for rotating the mounting shaft 603 is installed on the support frame 602;

[0065] It should be noted here that: the fourth gear 604 on the mounting shaft 603 is driven to rotate by the driving motor 605. During the rotation of the fourth gear 604, the ring plate 4 is driven to move by the mutual meshing transmission between the fourth gear 604 and the second gear ring 601.

[0066] In this embodiment, the watch movement can be a volumetric watch movement, a speed watch movement or any watch movement in the prior art.

[0067] In this embodiment, the controllable valve is one of an electrically driven valve, a pneumatically driven valve or a hydraulically driven valve; wherein the electrically driven valve may be a solenoid valve or an electric valve.

[0068] In this scheme: a dual-circulation intelligent water meter with a pressure sensor includes the following steps:

[0069] The water meter in the present application is provided with an inlet pipe and a return pipe to form a dual-circuit water meter. When the dual-circuit water meter is in use, the water inlet inlet 1021 of the water inlet pipe is connected to the water supply pipe of the direct drinking water network, and the water inlet outlet 1022 of the water inlet pipe is connected to the user's household water inlet pipe, and the return water inlet 1031 of the return water pipe is connected to the user's return water pipe, and the return water outlet 1032 is connected to the return water pipe of the direct drinking water network. After the connection of the water meter body 101 is completed, it can be used normally. When the setting When the water consumption reaches a preset value within a set time, the second controllable valve 108 can be kept closed. Due to the large water consumption, there will be no dead water problem in the water inlet pipeline. At the same time, when it is detected that the water has not been used for a long time or within a set time, the second controllable valve 108 is opened to circulate the water accumulated in the water inlet pipeline, effectively avoiding the pollution problem of dead water. At the same time, the water meter has a built-in first meter core 105 and a second meter core 106, and dual-pipeline differential measurement. Only when the water is used, the water inlet pipeline is closed. Metering starts only when a difference is generated in the actual water consumption of the user, and circulating water will not be metered and charged. This not only meets the need for accurate metering, but also solves the need for flowing living water for direct drinking water, meets the hygienic requirements of drinking water, and monitors and manages the user's water consumption and circulating water volume in real time and at a fixed point. During the use of the water meter, the pressure sensor body 2 is used to monitor the pressure inside the pipeline. When the faucet or pipeline drips, the pressure in the water meter body 101 will slowly decrease. When the pressure is lower than the preset threshold, the first controllable valve 107 is opened to add water to the pipeline. When the pressure in the water meter body 101 is higher than the preset threshold, a delay of n seconds is performed. If no new water is detected within n seconds, the first controllable valve 107 is closed. If water flows, the timing is restarted after n seconds. If the pressure in the water meter body 101 is slowly reduced for three consecutive times, it is determined to be a pipeline dripping or a user intentionally stealing water, and an alarm message is sent and the first controllable valve 107 is closed, thereby forming a dripping or intentional water theft alarm function;

[0070] In the process of using the pressure sensor body 2 to monitor the pressure inside the pipeline in real time, as time goes by, impurities in the water will adhere to the detection head 203 of the pressure sensor detection rod 202. In order to avoid measurement errors in the pressure detection process, the detection head 203 is cleaned. During the cleaning process, the first controllable valve 107 is closed. After the closure is completed, the annular plate 4 is driven to rotate inside the annular cover 3 through the cooperation of the driving component and the first rotating component. During the rotation of the annular plate 4, the mounting frame 701 is driven to move synchronously through the connecting frame 702. During the movement of the mounting frame 701, the rotating shaft 1001 is driven to move synchronously. During the movement of the rotating shaft 1001, the third gear 1002 and the first gear ring 1003 are meshed with each other to drive the rotating shaft 1001 and the second gear 902 to rotate. During the rotation of the second gear 902, the second gear 902 and the first gear 901 are meshed with each other to drive the circular plate 704 to rotate inside the mounting sleeve 703. During the rotation of the circular plate 704, the connecting action of the telescopic assembly drives the operating rod 705 and the friction block 706 to rotate.

[0071] During the movement of the mounting frame 701, the operating rod 705 is driven to rotate around the lower end of the detection rod 202 while rotating by the connection between the mounting sleeve 703, the circular plate 704 and the telescopic assembly. During the movement of the operating rod 705, the conical surface 707 of the operating rod 705 is abutted against the end of the detection head 203. During the abutment process, the operating rod 705 is pushed to contract toward the circular plate 704. As the operating rod 705 continues to move, the friction block 706 on the operating rod 705 is abutted against the lower side of the detection head 203 (see FIG. 2 ). Figure 8 ), through the rotation of the operating rod 705 and the friction block 706 and the abutment between the friction block 706 and the lower end of the detection head 203, the front end of the detection head 203 is cleaned, and in the process of cleaning, the elastic force of the telescopic component on the operating rod 705 after the contraction movement is pushed, so that the friction block 706 on the operating rod 705 maintains a certain pressure and abuts against the front end of the detection head 203, thereby avoiding the gap between the detection head 203 and the friction block 706 due to the retractability of the detection head 203 itself during the cleaning process, thereby ensuring the cleaning effect of the detection head 203, and through the effective cleaning of the detection head 203, it is convenient for the pressure sensor body 2 to accurately measure the internal pressure of the water meter pipeline, and after the cleaning is completed, the second controllable valve 108 is opened to return the internal water contaminated during the cleaning process to the return water pipeline and return it to the direct drinking water equipment for treatment to avoid direct drinking.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-circulation intelligent water meter with a pressure sensor, comprising: A water meter body (101), wherein the water meter body (101) is provided with a water inlet pipeline and a water return pipeline; It is characterized by further comprising: A pressure sensor body (2) installed inside a water meter body (101) for detecting the pressure of a water inlet pipeline, the water inlet pipeline comprising a water inlet pipe (102), the two ends of the water inlet pipe (102) being respectively provided with a water inlet inlet (1021) and a water inlet outlet (1022), the return water pipeline comprising a return water pipe (103), the two ends of the return water pipe (103) being respectively provided with a return water inlet (1031) and a return water outlet (1032), the water inlet outlet (1022) and the return water inlet (1031) being connected to each other at a user's end faucet by a three-way pipe (104); The water inlet pipeline and the water return pipeline are respectively installed with a first controllable valve (107) and a second controllable valve (108) for opening and closing control; When the dual-circuit water meter is in use, when it is detected that the water consumption reaches a preset value within a set time period, the second controllable valve (108) is kept closed to avoid dead water in the water inlet pipeline; when no water is used within the set time period, the second controllable valve (108) is opened to circulate the water accumulated in the water inlet pipeline to avoid dead water pollution; The water meter body (101) is provided with two sets of a first meter core (105) and a second meter core (106) for respectively measuring the flow of the water inlet pipeline and the water return pipeline; The pressure sensor body (2) comprises a mounting seat (201) for auxiliary positioning installation and a detection rod (202) for auxiliary detection, the front end of the detection rod (202) is provided with a detection head (203) for auxiliary detection, the lower end of the mounting seat (201) is fixed with an annular cover (3), the detection rod (202) is located inside the annular cover (3), an annular plate (4) is provided between the detection rod (202) and the annular cover (3), a first rotating component for assisting the rotatable connection of the annular plate (4) and a driving component for driving the annular plate (4) are provided between the annular plate (4) and the annular cover (3), and a cleaning component for cleaning the detection head (203) is provided on the annular plate (4).

2. A dual-circulation intelligent water meter with a pressure sensor according to claim 1, characterized in that: The water meter body (101) is provided with two sets of first meter cores (105) and second meter cores (106) for measuring the flow of the water inlet pipeline and the water return pipeline respectively. During the use of the water meter, when the faucet is dripping, the pressure in the water meter body (101) is reduced. When the pressure is lower than a preset threshold, the first controllable valve (107) is opened to add water to the pipeline. When the pressure in the water meter body (101) is higher than the preset threshold, a delay of n seconds is performed. If no new water flow is detected within n seconds, the first controllable valve (107) is closed. If water flows, the timing is restarted after n seconds. If the pressure in the water meter body (101) is reduced for three consecutive times, it is determined that the pipeline is dripping or the user is intentionally stealing water. An alarm message is sent and the first controllable valve (107) is closed. After confirming that the water is manually released or has returned to normal, the valve is released to form a dripping or intentional water theft alarm function.

3. A dual-circulation intelligent water meter with a pressure sensor according to claim 2, characterized in that: The cleaning components are provided in two groups, and the two groups of cleaning components are symmetrically arranged. The cleaning components include a mounting frame (701), the mounting frame (701) and the annular plate (4) are connected and fixed via a connecting frame (702), a mounting sleeve (703) is fixed to one end of the mounting frame (701), a circular plate (704) is rotatably connected inside the mounting sleeve (703), an operating rod (705) is arranged between the circular plate (704) and the detection rod (202), and a A telescopic component is used to assist the telescopic connection of the operating rod (705); a friction block (706) is fixed to the upper end of the operating rod (705) for rubbing against the surface of the detection head (203); a second rotating component for rotating the circular plate (704) is arranged on the mounting frame (701); a transmission component for transmitting the second rotating component is arranged between the mounting frame (701) and the outer side of the detection rod (202); and a conical surface (707) for transmitting against the detection head (203) is opened on the outer side of the operating rod (705).

4. A dual-circulation intelligent water meter with a pressure sensor according to claim 3, characterized in that: The telescopic assembly comprises a plurality of sleeves (801) fixed to the lower end of the operating rod (705), a sliding rod (802) is slidably connected to the sleeve (801), one end of the sliding rod (802) is fixed to the circular plate (704), and a spring (803) is sleeved on the outer side of the sleeve (801).

5. A dual-circulation intelligent water meter with a pressure sensor according to claim 4, characterized in that: The second rotating assembly comprises a first gear (901) fixed to the lower end of the circular plate (704), a second gear (902) is arranged below the mounting frame (701), and the first gear (901) and the second gear (902) are meshed with each other.

6. A dual-circulation intelligent water meter with a pressure sensor according to claim 5, characterized in that: The transmission assembly comprises a rotating shaft (1001) rotatably connected to the mounting frame (701), one end of the rotating shaft (1001) is fixed to the second gear (902), the other end of the rotating shaft (1001) is fixed to the third gear (1002), the outer side of the detection rod (202) is sleeved with a first gear ring (1003), and the third gear (1002) and the first gear ring (1003) are meshed with each other.

7. A dual-circulation intelligent water meter with a pressure sensor according to claim 6, characterized in that: The first rotating assembly comprises an annular groove (501) formed on the outside of the annular plate (4); a rotating ring (502) is rotatably connected inside the annular groove (501); and the rotating ring (502) is fixed inside the annular cover (3).

8. A dual-circulation intelligent water meter with a pressure sensor according to claim 7, characterized in that: The cross-sections of the annular groove (501) and the rotating ring (502) are T-shaped.

9. A dual-circulation intelligent water meter with a pressure sensor according to claim 8, characterized in that: The driving assembly comprises a second gear ring (601) fixed to the upper end of the annular plate (4); a support frame (602) is fixed inside the annular cover (3); a mounting shaft (603) is rotatably connected to the support frame (602); a fourth gear (604) is fixed to one end of the mounting shaft (603); the fourth gear (604) and the second gear ring (601) are meshed with each other; and a driving motor (605) for rotating the mounting shaft (603) is installed on the support frame (602).

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