WO2021232654A1

WO2021232654A1 - Anti-disassembly diaphragm gas meter with wireless remote-reading

Info

Publication number: WO2021232654A1
Application number: PCT/CN2020/117991
Authority: WO
Inventors: 朱伟泳; 袁林栋; 庄健; 杨少亮; 王法良; 叶骁; 王滨滨; 胡莽
Original assignee: 上海飞奥燃气设备有限公司
Priority date: 2020-05-22
Filing date: 2020-09-27
Publication date: 2021-11-25
Also published as: CN111537034A; CN111537034B

Abstract

An anti-disassembly diaphragm gas meter with wireless remote-reading, comprising a housing (1) and an upper cover (2) provided at an opening of the housing (1). A probe (5) is provided on the inner surface of the upper cover (2); a side pressing type button (4) is provided inside the housing (1); the probe (5) is configured to press the side pressing type button (4) when the upper cover (2) is mounted on the housing (1); a controller connected to the side pressing type button (4) and a motor valve (6) connected to the controller are arranged in the housing (1); and the controller is configured to send a disassembly alarm signal and control the motor valve (6) to be closed when the side pressing type button (4) bounces up.

Description

Anti-disassembly wireless remote transmission diaphragm gas meter

This application claims the priority of the Chinese patent application whose application date is May 22, 2020 and the application number is 202010440507.4. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the field of sensor meters, for example, to a tamper-proof wireless remote transmission membrane gas meter.

Background technique

Membrane gas meters are mainly used for user terminal metering of civil and industrial pipeline natural gas. The gas meter body usually has a seal structure to prevent users from dismantling the meter, or leaving traces of dismantling in the case of malicious forcible dismantling. At present, the anti-dismantling of gas meters in related technologies in the industry mainly adopts mechanical lead sealing, and this method continues to wireless remote transmission diaphragm gas meters. This method has many disadvantages: for example, the gas meter cannot be found in time after being dismantled, and the timeliness is very poor; after dismantling, it may cause gas leakage, which affects gas safety; after dismantling, data may be tampered with, affecting gas company supply and sales. data.

Summary of the invention

The present application provides an anti-disassembly wireless remote transmission membrane gas meter. The gas meter realizes the anti-disassembly function of the gas meter by adopting a disassembly detection mechanism, and can deal with the problems existing in the anti-disassembly of the lead seal.

The embodiment of the application provides a tamper-proof wireless remote transmission diaphragm gas meter, which includes a casing and an upper cover arranged at an opening of the casing; an inner surface of the upper cover is provided with a probe, and the inside of the casing A side pressure button is provided; the probe is configured to press down the side pressure button when the upper cover is installed on the housing;

The housing is provided with a controller connected to the side pressure button and a motor valve connected to the controller; the controller is configured to send out when the side pressure button bounces up. Machine alarm signal and control the motor valve to close.

Description of the drawings

Figure 1 is a front schematic diagram of a wireless remote transmission diaphragm gas meter;

Figure 2 is a partial enlarged view of A in Figure 1;

Figure 3 is a cross-sectional view of a wireless remote transmission diaphragm gas meter;

Figure 4 is a partial enlarged view of B in Figure 3;

Fig. 5 is an example diagram of a plurality of optional positions of the side pressure key on the back of the circuit board.

Detailed ways

Please refer to FIGS. 1 to 4, an embodiment of the present application provides a tamper-proof wireless remote transmission diaphragm gas meter, which includes a casing 1. The casing 1 is provided with an opening, and an upper cover 2 is installed at the opening, and the upper cover 2 is arranged to cover the circuit board 3 inside the casing 1. The circuit board 3 is arranged in parallel with the inner surface of the upper cover 2, and the front surface of the circuit board 3 faces the inner surface of the upper cover 2.

In order to prevent the upper cover 2 from being deliberately disassembled, a side pressing button 4 is provided inside the housing 1, and a probe 5 is provided on the inner surface of the upper cover 2. The positional relationship between the two is satisfied when the upper cover 2 is installed. When the probe 5 is on the housing 1, the side pressure button 4 is pressed down from the side, that is, when the upper cover 2 is normal, the side pressure button 4 is in a normally closed state.

When the upper cover 2 is disassembled, the probe 5 will be separated from the side pressing button 4, and by monitoring the state of the side pressing button 4, it can be monitored whether the upper cover 2 is disassembled. In some embodiments, the circuit board 3 is provided with a controller (integrated on the circuit board 3, not shown) connected to the side pressing button 4 and a motor valve 6 connected to the controller. The side pressure button 4 is also not shown in FIGS. 3 and 4.

The controller is configured to send a disassembly alarm signal when the side pressure button 4 pops up, and control the motor valve 6 to close. The anti-disassembly wireless remote transmission diaphragm gas meter also includes an air inlet pipe 9 and an air outlet pipe 10. The motor valve 6 is connected to the air inlet pipe 9, and the gas meter cannot use gas normally when the motor valve 6 is closed, ensuring the gas meter piping system It is safe, while avoiding the theft of gas, there will be no difference in supply and sales, and the gas company will not suffer losses due to this.

The controller is connected to the wireless communication module. When the upper cover 2 is detected through the side pressure button 4, it is uploaded to the gas meter management platform through the wireless communication module, and the gas company can receive the information that the gas meter has been disassembled in time , So that the gas company can grasp the status information of the gas meter being dismantled in time. In this embodiment, the operating logic of the controller is simple. It only needs to generate a switch signal and a fixed digital signal sequence according to the state of a button. It can be realized by using a simple digital logic circuit instead of using special software. Involving improvements to methods.

In some embodiments, the side pressing button 4 and the controller are arranged on the back of the circuit board 3 (the circuit board 3 faces the upper cover 2). The side pressing key 4 has a key shaft 7 whose expansion and contraction direction is parallel to the circuit board 3. The front of the circuit board 3 faces the upper cover 2, the circuit board 3 is provided with a through hole corresponding to the key shaft 7, and the through hole 8 allows the probe 5 to pass through to press the key shaft 7 of the side pressure key 4.

In order to improve safety, in a specific embodiment, the shape of the through hole on the circuit board 3 is adapted to the cross-sectional shape of the probe 5. The ratio of the width d of the key shaft 7 to the narrowest part of the cross-sectional shape of the probe 5 is less than 1:2. The placement position of the side pressing button 4 is randomly selected around the through hole of the circuit board 3, and it is satisfied that the probe 5 can press the key shaft 7 of the side pressing button 4 when the upper cover 2 is installed on the housing 1. As shown in FIG. 5, a1, a2, and a3 around the through hole 8 in the figure are the positions of the optional side-press buttons 4. Fig. 2 shows the state when the key shaft 7 is not pressed down. In the process of being depressed, the key shaft 7 shrinks along its axis toward the inside of the main body of the side pressure key 4 until the end of the key shaft 7 is flush with the side surface of the main body of the side pressure key 4.

In some embodiments, the through hole 8 on the circuit board 3 is circular, and the cross section of the probe 5 is also circular, and the two can form a clearance fit. In this case, the side pressure keys 4 can be arbitrarily selected along the circumferential direction. Compared with the square through hole 8, the round through hole 8 makes the optional installation range of the side pressure key 4 wider.

The role of the random selection of the installation position of the side pressure button 4 is that the side pressure button 4 is arranged on the back of the circuit board 3, so that the disassembler cannot observe the position of the key shaft 7, and prevents the disassembler from using sheets and other objects in the disassembly. During the machine, specific measures are taken according to the position of the side-press button 4. The use of the key shaft 7 with a narrow width makes it difficult for the disassembler to block the rebound of the key shaft 7 according to the position of the key shaft 7.

In addition, in this embodiment, the side pressure button 4 adopts a small trigger stroke (the trigger stroke refers to that the key shaft 7 rebounds to a small distance to make the side pressure button 4 disconnect), so that even when the machine is disassembled During the process, the probe 5 is inserted into the through hole 8, and it is difficult to keep the posture of the probe 5 unchanged. A slight swing of the probe 5 can disconnect the side pressing button 4, which increases the difficulty of disassembly.

In some embodiments, the probe 5 is perpendicular to the inner surface of the upper cover 2; the end of the probe 5 is wedge-shaped or tapered, and the bevel at the end of the probe 5 is configured to push the key shaft 7 of the side pressing button 4 to contract. .

The beneficial technical effects of this application are: making full use of the highly sensitive and highly reliable structure of the side pressure button 4 and the probe 5, combining the wireless remote transmission function of the controller and the function of controlling the built-in motor valve 6, so as to enable gas companies Keep abreast of the gas meter's status in time and close the built-in motor valve 6 in time when disassembling the machine to ensure gas safety and avoid gas theft, so as to ensure the accuracy of the gas meter's long-term measurement data and continue to operate stably during its life cycle.

Claims

A tamper-proof wireless remote transmission membrane gas meter includes a casing (1) and an upper cover (2) arranged at the opening of the casing (1); the inner surface of the upper cover (2) is provided with The probe (5), the housing (1) is provided with a side pressing button (4); the probe (5) is set to: when the upper cover (2) is installed in the housing (1) ) When up, press down the side pressure button (4);

The housing (1) is provided with a controller connected to the side pressure button (4) and a motor valve (6) connected to the controller; the controller is configured to When the push button (4) pops up, it sends out a disassembly alarm signal and controls the motor valve (6) to close.
The tamper-proof wireless remote transmission diaphragm gas meter according to claim 1, wherein a circuit board (3) opposite to the upper cover (2) is arranged inside the casing (1), and the side pressure The button (4) and the controller are arranged on the circuit board (3).
The tamper-proof wireless remote transmission membrane gas meter according to claim 2, wherein the side pressure button (4) is arranged on the back of the circuit board (3), and the side pressure button (4) There is a key shaft (7) whose expansion and contraction direction is parallel to the circuit board (3); the circuit board (3) is provided with the key shaft (7) corresponding to the side pressing button (4) The through hole (8) of the through hole (8) is provided for the probe (5) to pass through to press the key shaft (7) of the side pressure button (4).
The tamper-proof wireless remote diaphragm gas meter according to claim 3, wherein the shape of the through hole (8) is adapted to the cross-sectional shape of the probe (5); the key shaft (7) The ratio of the width of the probe (5) to the width of the narrowest part of the cross-sectional shape of the probe (5) is less than 1:2.
The tamper-proof wireless remote diaphragm gas meter according to claim 4, wherein the side pressure button (4) is arranged close to the through hole (8) and when the upper cover (2) is installed at the When the housing (1) is on, the probe (5) can depress the key shaft (7) of the side pressure key (4).
The tamper-proof wireless remote diaphragm gas meter according to claim 3, wherein the probe (5) is perpendicular to the inner surface of the upper cover (2); the end of the probe (5) It is wedge-shaped or cone-shaped, and the inclined surface of the end of the probe (5) is set to push the key shaft (7) of the side pressure key (4).
The tamper-proof wireless remote transmission diaphragm gas meter according to claim 1, further comprising an air inlet pipe (9), and the motor valve (6) is connected to the air inlet pipe (9).
The tamper-proof wireless remote transmission membrane gas meter according to claim 1, further comprising a wireless communication module, and the controller is connected to the wireless communication module.