Water meter valve opening structure capable of detecting current valve rotation direction

Abstract

The utility model discloses a water meter valve opening degree structure capable of detecting the current valve rotation direction, which comprises a gear transmission system arranged on a water meter valve, the gear transmission system comprises a transmission disc, a plurality of gears which are arranged in the transmission disc and are in meshing transmission, and a shell arranged outside the transmission disc, a PCB (printed circuit board) is arranged in the shell, and the PCB is connected with the transmission disc. The PCB is arranged above the plurality of gears which are in meshed transmission, the two unipolar Hall elements are inserted into the PCB, and the two magnetic steels are arranged right below the PCB and are fixed on the same gear. The magnetic transmission valve control water meter can detect the rotation direction of the current valve, meanwhile, a magnetic detection valve control system is adopted, the waterproof performance achieved through magnetic transmission can be ensured, the working state of the valve can be accurately detected, accurate valve opening control is achieved, and the magnetic transmission valve control water meter is suitable for magnetic transmission valve control water meters.

Description

Technical Field

[0001] This utility model relates to the field of water meter valve opening control technology, specifically a water meter valve opening structure capable of detecting the current valve rotation direction. Background Technology

[0002] With the increasing prevalence of smart water meters, operators can now aggregate and quantify water meter data at their terminals. This leads to higher demands on water meter control. Existing technologies, primarily based on automatic valve switching, only require valves to be fully open or closed, lacking specific requirements and solutions for the degree of opening. This makes it impossible to precisely control the valve's opening and closing angles, and relies on detecting motor current to determine the valve's operational status and whether it is blocked. Furthermore, it cannot determine the direction of valve rotation.

[0003] Therefore, in order to correct the above-mentioned defects, we propose a water meter valve opening structure that can detect the current valve rotation direction. Utility Model Content

[0004] The technical problem solved by this utility model is to propose a water meter valve opening structure that can detect the current valve rotation direction.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water meter valve opening structure capable of detecting the current valve rotation direction, comprising a gear transmission system installed on the water meter valve, the gear transmission system comprising a transmission disc, a plurality of meshing gears installed in the transmission disc, and a housing installed outside the transmission disc, a PCB board installed inside the housing, the PCB board being positioned above the plurality of meshing gears, and further comprising two unipolar Hall effect sensors and two magnets, the two unipolar Hall effect sensors being inserted into the PCB board, the two magnets being positioned directly below the PCB board, and the two magnets being fixed to the same gear;

[0006] The two unipolar Halls are Hall I and Hall II, respectively. Hall I is attracted at the S pole, and Hall II is attracted at the N pole.

[0007] The two magnets are magnet A and magnet B, with the S pole facing upwards for magnet A and the N pole facing upwards for magnet B;

[0008] The attraction angle between the unipolar Hall effect sensor and the two magnets is ±35°.

[0009] When the valve is activated, the direction of the valve's operation can be determined by detecting the timing of the changes in the levels of the two Hall sensors.

[0010] Furthermore, the included angle between the two magnets is 120°, and the two unipolar Hall effect sensors are arranged side by side.

[0011] Furthermore, the included angle between the two magnets is 120°, and the included angle between the two unipolar Hall effect sensors is 90°.

[0012] Compared with existing technologies, the advantages of this invention are as follows: This invention can detect the current rotation direction of the valve. Simultaneously, it employs a magnetic detection valve control system, ensuring both the waterproof performance of the magnetic drive and accurate detection of the valve's operating status, achieving precise valve opening control. It is suitable for magnetically driven valve-controlled water meters. By detecting the magnetic reluctance's engagement state and coordinating with PWM modulation of the motor output, the water meter valve can operate at the required opening degree. The valve control system ensures waterproof performance through magnetic drive, and the PWM modulation output controls the torque of the magnetic drive, ensuring that the motor will not demagnetize due to excessive torque causing valve blockage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the gear transmission system structure in this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of two magnets on a gear in this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the housing mounted on the transmission disc in this utility model;

[0016] Figure 4 This is a schematic diagram of the Hall effect sensor mounted on a PCB board in this utility model;

[0017] Figure 5 This is a timing diagram of the Hall level during forward and reverse rotation in Example 1;

[0018] Figure 6 This is a timing diagram of the Hall level during forward and reverse rotation in Example 2.

[0019] In the diagram: 1. Transmission disc; 2. Gear; 3. Magnet; 4. Housing; 5. Unipolar Hall effect sensor. Detailed Implementation

[0020] 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.

[0021] This utility model provides a technical solution:

[0022] Please see Figure 1-6A water meter valve opening structure capable of detecting the current valve rotation direction includes a gear transmission system installed on the water meter valve. The gear transmission system includes a transmission disc 1, several meshing gears 2 installed inside the transmission disc 1, and a housing installed outside the transmission disc 1. A PCB board is installed inside the housing, and the PCB board is positioned above the meshing gears 2. The system also includes two unipolar Hall effect sensors 5 and two magnets 3. The two unipolar Hall effect sensors 5 are inserted into the PCB board, and the two magnets 3 are positioned directly below the PCB board and fixed to the same gear 2. After the PCB board supplies power to the unipolar Hall effect sensors 5, it outputs a magnetic attraction state, thereby enabling the detection of the current valve rotation direction.

[0023] Example 1

[0024] Two unipolar Hall effect sensors 5 and two magnets 3 at a 120-degree angle are used. The attraction angle of the unipolar Hall effect sensor 5 above the magnets 3 is ±35 degrees. By adjusting the magnetic field strength of the magnets 3, the distance and angle of the Hall effect sensor from the gear 2, it is ensured that the Hall effect sensor is attracted when the magnets 3 on the gear 2 rotate to the fan-shaped area within ±35 degrees, otherwise it is not attracted. Magnet A has its S pole facing up and magnet B has its N pole facing up. Hall effect sensor I is attracted with its S pole, and Hall effect sensor II is attracted with its N pole. The two Hall effect sensors are placed together.

[0025] When the valve operates, the direction of valve operation can be determined by detecting the timing changes in the voltage levels of two Hall effect sensors. The timing diagram is shown below. Figure 5 As shown, 1 indicates that the Hall effect sensor is not engaged and outputs a high level, while 0 indicates that the Hall effect sensor is engaged and outputs a low level. When Hall effect sensor I changes from engaged to disengaged, Hall effect sensor II immediately changes from disengaged to engaged, indicating that the valve is rotating in reverse; otherwise, it is rotating in forward.

[0026] Example 2

[0027] Compared with Embodiment 1, Embodiment 2 still uses two unipolar Hall effect sensors 5 and two magnets 3 at a 120-degree angle, but the installation position of the two unipolar Hall effect sensors 5 is changed to a 90-degree angle.

[0028] When the valve actuates, the direction of valve actuation can be determined by detecting the timing changes in the voltage levels of two Hall effect sensors. The timing diagram is shown below. Figure 5 As shown, 1 indicates that the Hall effect sensor is not engaged and outputs a high level, while 0 indicates that the Hall effect sensor is engaged and outputs a low level. Here, 0 / 1 represents the phase change of the two magnetoresistors; the first value is Hall I, and the second value is Hall II.

[0029] The timing sequence during forward rotation is 11–01–00–10–11.

[0030] The timing sequence during inversion is 11–10–00–01–11.

[0031] When 01 changes to 00, it indicates that the current movement is forward; when 10 changes to 00, it indicates that the current movement is reverse.

[0032] In Embodiment 1 and Embodiment 2, when the valve action direction is detected to be inconsistent with the expected direction, it is determined that the valve control line is reversed, triggering a valve wiring error alarm. The valve control pin is then changed to control the valve action in the corrected direction. With the help of software, it is possible to detect whether there is magnetic reluctance damage in the two Hall sensors. If one of them is damaged (a certain Hall sensor does not have any phase change), the direction detection function is canceled, and only the valve opening function is implemented.

[0033] This invention relates to magnetically driven valve-controlled water meters. By detecting the activation state of a Hall effect sensor and coordinating it with PWM modulation of the motor output, the water meter valve is able to operate at the required opening degree. The valve control system uses magnetic transmission to ensure its waterproof performance, and PWM modulation controls the torque of the magnetic transmission to prevent the motor from demagnetizing due to excessive torque causing valve blockage.

[0034] Using Hall effect sensors to detect the operating status of a valve control system is more reliable than determining the valve's operating status by detecting the motor's operating current. In existing technologies, when valve demagnetization or jamming occurs, the motor current, driven by magnetic transmission, cannot distinguish between these phenomena and cannot determine whether the motor is idling. This invention, however, can accurately confirm whether the motor is currently operating and, if so, what state it is in.

[0035] Furthermore, it is unaffected by issues such as valve wear and motor aging. Even if the motor's operating speed changes due to these issues, the number of motor rotations for one complete valve operation will not change. By controlling the number of phase changes in the operation, the valve opening degree can be precisely controlled.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water meter valve opening structure capable of detecting the current valve rotation direction, comprising a gear transmission system installed on the water meter valve, the gear transmission system comprising a transmission disc (1), a plurality of meshing gears (2) installed in the transmission disc (1), and a housing installed outside the transmission disc (1), wherein a PCB board is installed inside the housing, the PCB board being positioned above the plurality of meshing gears (2), characterized in that: It also includes two unipolar Hall effect sensors (5) and two magnets (3). The two unipolar Hall effect sensors (5) are inserted into the PCB board, and the two magnets (3) are located directly below the PCB board and are fixed on the same gear (2). The two unipolar Halls (5) are Hall I and Hall II, respectively. Hall I is attracted by the S pole, and Hall II is attracted by the N pole. The two magnets (3) are magnet A and magnet B, respectively. Magnet A has its S pole facing up and magnet B has its N pole facing up. The attraction angle between the unipolar Hall (5) and the two magnets (3) is ±35°. When the valve is activated, the direction of the valve's operation can be determined by detecting the timing of the level changes of the two Hall sensors (5).

2. The water meter valve opening structure capable of detecting the current valve rotation direction according to claim 1, characterized in that: The included angle between the two magnets (3) is 120°, and the two unipolar Hall effect sensors (5) are arranged side by side.

3. The water meter valve opening structure capable of detecting the current valve rotation direction according to claim 1, characterized in that: The included angle between the two magnets (3) is 120°, and the included angle between the two unipolar Hall effect sensors (5) is 90°.

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