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

Abstract

The invention discloses a water meter valve opening 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 is arranged in the shell, and the PCB is arranged in the shell. 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 rotating direction of the current valve can be detected, 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] The present invention relates to the technical field of water meter valve opening control, and specifically relates to a water meter valve opening structure that can detect the current valve rotation direction. Background Art

[0002] With the popularization of intelligent water meters, operators can aggregate and quantify water meter data at the terminal, and the control requirements for water meters are also getting higher and higher. Existing technologies mainly focus on automatic opening and closing valves, only requiring the valve to be fully opened or fully closed, without the need and solution for the opening degree, and cannot accurately control the opening and closing angles of the valve. Moreover, it determines the action state of the valve and whether it is jammed by detecting the motor current, and cannot determine the valve rotation direction.

[0003] Therefore, in order to correct the above defects, we propose a water meter valve opening structure that can detect the current valve rotation direction. Summary of the Invention

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

[0005] To achieve the above object, the present invention provides the following technical solution: A water meter valve opening structure that can detect the current valve rotation direction, including a gear transmission system installed on the water meter valve. The gear transmission system includes a transmission disk, several meshing gears installed inside the transmission disk, and a housing installed outside the transmission disk. A PCB board is installed inside the housing, and the PCB board is above several meshing gears. It also includes two unipolar Hall sensors and two permanent magnets. The two unipolar Hall sensors are inserted on the PCB board, and the two permanent magnets are directly below the PCB board and fixed on the same gear.

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

[0007] The two permanent magnets are permanent magnet A and permanent magnet B respectively. The S pole of permanent magnet A faces upward, and the N pole of permanent magnet B faces upward.

[0008] The attraction angles between the unipolar Hall sensors and the two permanent magnets are both ±35°.

[0009] When the valve operates, the current valve action direction can be confirmed by detecting the timing of the level changes of the two Hall sensors.

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

[0011] Further, the included angle between the two magnetic steels is 120°, and the included angle between the two unipolar Hall elements is 90°.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention can detect the rotation direction of the current valve. At the same time, by adopting a magnetic detection valve control system, it can not only ensure the waterproof performance achieved by magnetic drive, but also accurately detect the working state of the valve, realize accurate control of the valve opening, and is applicable to magnetic drive valve-controlled water meters. By detecting the suction state of the magnetoresistance and cooperating with the PWM modulation motor output, the function of making the water meter valve act according to the required opening is realized. The valve control system ensures the waterproof performance of the valve control system through magnetic drive, and controls the torque of the magnetic drive by PWM modulation to the motor output, ensuring that the motor will not be demagnetized when the valve is blocked due to excessive torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the gear transmission system in the present invention;

[0014] Figure 2 is a schematic structural diagram of two magnetic steels on the gear in the present invention;

[0015] Figure 3 is a schematic structural diagram of the housing mounted on the drive disk in the present invention;

[0016] Figure 4 is a schematic structural diagram of the Hall element mounted on the PCB board in the present invention;

[0017] Figure 5 is the Hall voltage timing diagram during forward and reverse rotations in the first embodiment;

[0018] Figure 6 is the Hall voltage timing diagram during forward and reverse rotations in the second embodiment.

[0019] In the figure: 1. Drive disk; 2. Gear; 3. Magnetic steel; 4. Housing; 5. Unipolar Hall element. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] The present invention provides a technical solution:

[0022] Please refer to Figure 1-6, A water meter valve opening structure capable of detecting the current rotation direction of the valve, including a gear transmission system installed on the water meter valve. The gear transmission system includes a transmission disk 1, several meshing gears 2 installed inside the transmission disk 1, and a housing installed outside the transmission disk 1. A PCB board is installed inside the housing. The PCB board is above several meshing gears 2. It also includes two unipolar Hall sensors 5 and two permanent magnets 3. The two unipolar Hall sensors 5 are inserted on the PCB board. The two permanent magnets 3 are directly below the PCB board and are fixed on the same gear 2. After the PCB board powers the unipolar Hall sensors 5, the magnetic attraction state is output, so as to be able to detect the current rotation direction of the valve.

[0023] Embodiment 1

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

[0025] When the valve operates, the current operation direction of the valve can be confirmed by detecting the timing sequence of the level changes of the two Hall sensors. The timing diagram is as Figure 5 shown. 1 indicates that the Hall sensor is not attracted and outputs a high level, and 0 indicates that the Hall sensor is attracted and outputs a low level. When Hall I changes from being attracted to not being attracted, Hall II immediately changes from not being attracted to being attracted, indicating that the valve is rotating in reverse at this time, otherwise it is rotating forward.

[0026] Embodiment 2

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

[0028] When the valve operates, the current operation direction of the valve can be confirmed by detecting the timing sequence of the level changes of the two Hall sensors. The timing diagram is as Figure 5 shown. 1 indicates that the Hall sensor is not attracted and outputs a high level, and 0 indicates that the Hall sensor outputs a low level after being attracted. Here, 0 / 1 represents the change in the phase of the two magnetoresistors. The value in front is Hall I, and the value behind is Hall II.

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

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

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

[0032] In the first and second embodiments, when it is detected that the valve action direction is inconsistent with the expected direction, it is determined that the valve control line is connected reversely, triggering an alarm for incorrect valve wiring, and changing the valve control pin to the corrected direction to control the valve to act. The software can detect whether there is magnetic resistance damage in two Hall sensors. If one is damaged (there is no phase change in a certain Hall sensor), the direction detection function is cancelled, and only the valve opening function is realized.

[0033] The present invention is applicable to magnetic drive valve-controlled water meters. By detecting the suction state of the Hall sensor and cooperating with the PWM modulation of the motor output, the function of the water meter valve to act according to the required opening is realized. The valve control system ensures the waterproof performance of the valve control system through magnetic drive, and controls the torque of the magnetic drive by PWM modulation to the motor output, ensuring that the motor will not be demagnetized when the valve is jammed due to excessive torque.

[0034] Detecting the working state of the valve control system through the Hall sensor is more reliable than determining the valve working state by detecting the motor working current. In the current prior art, when phenomena such as valve demagnetization and jamming occur, the motor current of the magnetic drive cannot distinguish the above phenomena and cannot determine whether the motor is idling, while the present invention can accurately confirm whether the current motor is acting and what state it is working in.

[0035] And it is not affected by problems such as valve wear and motor aging. Even if the working speed of the motor changes due to the above problems, the number of motor action turns for a complete valve action will not change. The valve action opening can be accurately controlled by controlling the number of phase change times of the action.

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

Claims

1. A water meter valve opening structure capable of detecting the current rotation direction of a valve, comprising a gear transmission system installed on the water meter valve. The gear transmission system includes a transmission disk (1), a plurality of meshing and driving gears (2) installed inside the transmission disk (1), and a housing installed outside the transmission disk (1). A PCB board is installed inside the housing and is located above the plurality of meshing and driving gears (2). It is characterized in that: It also includes two unipolar Hall sensors (5) and two magnets (3). The two unipolar Hall sensors (5) are inserted on the PCB board. The two magnets (3) are located directly below the PCB board and are fixed on the same gear (2). The two unipolar Hall sensors (5) are Hall I and Hall II respectively. Hall I is attracted when the S pole approaches, and Hall II is attracted when the N pole approaches. The two magnets (3) are Magnet A and Magnet B respectively. The S pole of Magnet A faces upward, and the N pole of Magnet B faces upward. The angle of attraction between the unipolar Hall sensor (5) and the two magnets (3) is ±35°. When the valve operates, the current valve operation direction can be confirmed 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, wherein: The angle between the two magnets (3) is 120°, and the two unipolar Hall 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 angle between the two magnets (3) is 120°, and the angle between the two unipolar Hall sensors (5) is 90°.

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