Gas stealing prevention device, equipment and system for gas meter

Abstract

The embodiment of the utility model provides a gas meter gas stealing prevention device, equipment and system, and belongs to the technical field of gas meters, the gas meter gas stealing prevention device comprises a first microswitch and an electric valve, the electric valve is used for being externally arranged on a gas pipeline, and the first microswitch comprises a first switch shell and a first spring mechanical assembly; the first spring mechanical assembly is arranged in the first switch shell, and the first end of the first spring mechanical assembly extends out of the first switch shell; the first microswitch is used for being arranged between the surface of the counter and a protective cover of the counter, and the first end of the first spring mechanical assembly is used for abutting against the surface of the counter or the protective cover. And a control port of the electric valve is connected with a signal output port of the first microswitch. According to the scheme, when the microswitch finds an abnormal condition, the electric valve is triggered to be closed, so that the gas stealing prevention capacity of the gas meter is improved, and gas stealing behaviors are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of gas meters, and in particular to a gas meter anti-theft device, equipment and system. Background Art

[0002] Gas meter is a very important metering instrument with sensitive measurement accuracy in pipeline gas trade settlement. The mainstream gas meter on the market is the mechanical diaphragm gas meter. The measurement of the mechanical diaphragm gas meter is realized through a counter. The counter adds operation according to the gas volume used. For each unit used, the count is increased by one, and finally the gas volume measurement record is realized.

[0003] Mechanical diaphragm gas meters can be divided into two types according to valve design: internal valve and external valve. External valves are installed on the outside of the diaphragm meter and have a mechanical emergency valve opening function, allowing the valve to be operated from the outside without disassembling the entire gas meter in an emergency or for maintenance. However, in actual use, some users take advantage of the easy disassembly of external valves and modify the counter to control the gas flow but not the number to achieve the purpose of stealing gas. At present, gas meters lack anti-theft functions and cannot effectively prevent gas theft. Utility Model Content

[0004] The main purpose of the embodiments of the present application is to propose a gas meter anti-gas theft device, equipment and system, aiming to improve the gas meter's anti-gas theft capability and reduce the occurrence of gas theft.

[0005] To achieve the above-mentioned purpose, the embodiment of the present application proposes a gas meter anti-theft device, comprising a first micro switch and an electric valve, wherein the electric valve is used to be externally mounted on a gas pipeline, the first micro switch comprises a first switch housing and a first spring mechanical component, the first spring mechanical component is arranged inside the first switch housing, and the first end of the first spring mechanical component extends out of the first switch housing;

[0006] The first micro switch is used to be arranged between the counter surface and the protective cover of the counter, and the first end of the first spring mechanical component is used to abut against the counter surface or the protective cover;

[0007] The control port of the electric valve is connected to the signal output port of the first micro switch.

[0008] In some embodiments, the first spring mechanical assembly is disposed on a first side inside the first switch housing;

[0009] A first normally closed static contact and a second normally closed static contact are provided on a first side surface inside the first switch housing;

[0010] A first normally open static contact and a second normally open static contact are provided on a second side surface inside the first switch housing, wherein the second side surface is opposite to the first side surface;

[0011] The first normally closed static contact and the first normally open static contact are aligned, and the second normally closed static contact and the second normally open static contact are aligned.

[0012] In some embodiments, the first spring mechanical assembly includes a first stopper, a first spring, and a first dynamic contact module;

[0013] The first moving contact module comprises a first base, a first moving contact and a second moving contact, wherein the first moving contact and the second moving contact are respectively arranged on two sides of the first base;

[0014] The first moving contact is aligned and arranged between the first normally open static contact and the first normally closed static contact, and the second moving contact is aligned and arranged between the second normally open static contact and the second normally closed static contact;

[0015] The first end of the first spring is connected to the first stop block, and the second end of the first spring is fixedly connected to the first base.

[0016] In some embodiments, the gas meter anti-theft device further includes a second micro switch and a judgment circuit module, the second micro switch includes a second switch housing and a second spring mechanical component, the second spring mechanical component is arranged inside the second switch housing, and the first end of the second spring mechanical component extends out of the second switch housing;

[0017] The second micro switch is used to be arranged between the bottom surface of the counter and the gas meter, and the first end of the second spring mechanical component is used to abut against the bottom surface of the counter or the gas meter;

[0018] The judgment circuit module is provided with a first input terminal, a second input terminal and a first output terminal;

[0019] The first input end is connected to the signal output port of the first micro switch, the second input end is connected to the signal output port of the second micro switch, and the first output end is connected to the control port of the electric valve.

[0020] In some embodiments, the judgment circuit module includes an AND gate unit, a first trigger unit, and a second trigger unit;

[0021] The input end of the first trigger unit is the first input end of the judgment circuit module, and the input end of the second trigger unit is the second input end of the judgment circuit module;

[0022] The input end of the AND gate unit is connected to the output end of the first trigger unit and the output end of the second trigger unit respectively;

[0023] The output end of the AND gate unit is the first output end of the judgment circuit module.

[0024] To achieve the above-mentioned purpose, another aspect of the embodiment of the present application provides a gas meter anti-theft device, including a counter, a protective cover, a gas meter and the gas meter anti-theft device as described above;

[0025] The protective cover is arranged on the surface of the counter, and the first micro switch of the gas meter anti-gas theft device is arranged between the protective cover and the surface of the counter;

[0026] The counter is arranged on the gas meter, and the second micro switch of the gas meter anti-gas theft device is arranged between the bottom surface of the counter and the gas meter;

[0027] The electric valve of the gas meter anti-gas theft device is used to be connected to the gas pipeline.

[0028] In some embodiments, the gas meter anti-gas theft device further includes a communication module, and the communication module is connected to the judgment circuit module of the gas meter anti-gas theft device.

[0029] To achieve the above-mentioned purpose, another aspect of an embodiment of the present application proposes a gas meter anti-gas theft system, including a smart terminal and the aforementioned gas meter anti-gas theft device, wherein the smart terminal interacts with the gas meter anti-gas theft device through the communication module of the gas meter anti-gas theft device.

[0030] The embodiments of the present application include at least the following beneficial effects: The present application provides a gas meter anti-gas theft device, equipment and system, which uses an electric valve to automatically control the closure of the pipeline. A microswitch is set between the counter and the protective cover, and the microswitch is communicated with the electric valve, so that the electric valve is automatically controlled based on the signal changes of the microswitch. When the microswitch detects an abnormal situation, it can trigger the electric valve to close the valve, thereby improving the gas meter's anti-gas theft capability and reducing the occurrence of gas theft. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the gas meter anti-gas theft device provided in an embodiment of the present application;

[0032] Figure 2 is a cross-sectional view of a first micro switch provided in an embodiment of the present application;

[0033] Figure 3 It is a partial structural schematic diagram of a gas meter anti-gas theft device provided in an embodiment of the present application;

[0034] Figure 4 is a schematic diagram of a display surface of a counter provided in an embodiment of the present application;

[0035] Figure 5 is a schematic structural diagram of a gas meter anti-gas theft device provided by another embodiment of the present application;

[0036] Figure 6 It is a circuit diagram of a gas meter anti-gas theft device provided in an embodiment of the present application.

[0037] Reference numerals:

[0038] The first micro switch 100, the electric valve 200, the counter 300, the protective cover 400, the first switch housing 110, the first normally closed static contact 111, the second normally closed static contact 112, the first normally open static contact 113, the second normally open static contact 114, the first stop block 120, the first spring 130, the first base 140, the first moving contact 141, the second moving contact 142, the second micro switch 500, and the judgment circuit module 600. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the descriptions involving orientation, such as up, down, left, right, etc., the orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of the utility model, if there is a description of first, second, etc., it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0042] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0043] Reference below Figure 1The utility model embodiment provides a gas meter anti-theft device, including a first micro switch 100 and an electric valve 200, the electric valve is used to be externally mounted on the gas pipeline, refer to Figure 2 The first micro switch includes a first switch housing 110 and a first spring mechanical assembly. The first spring mechanical assembly is arranged inside the first switch housing, and a first end of the first spring mechanical assembly extends out of the first switch housing.

[0044] refer to Figure 3 The first micro switch is used to be set between the surface of the counter 300 and the protective cover 400 of the counter, the first end of the first spring mechanical component is used to abut against the surface of the counter or the protective cover, and the control port of the electric valve is connected to the signal output port of the first micro switch.

[0045] In some embodiments, please refer to Figure 2 The first spring mechanical component is arranged on the first side surface inside the first switch housing; the first normally closed static contact 111 and the second normally closed static contact 112 are fixedly arranged on the first side surface inside the first switch housing; the first normally open static contact 113 and the second normally open static contact 114 are fixedly arranged on the second side surface inside the first switch housing, wherein the second side surface is opposite to the first side surface; the first normally closed static contact and the first normally open static contact are aligned, and the second normally closed static contact and the second normally open static contact are aligned.

[0046] In some embodiments, the first spring mechanical assembly includes a first stop block 120, a first spring 130 and a first moving contact module; the first moving contact module includes a first base 140, a first moving contact 141 and a second moving contact 142, and the first moving contact and the second moving contact are respectively fixed on both sides of the first base; the first moving contact is aligned between the first normally open static contact and the first normally closed static contact, and the second moving contact is aligned between the second normally open static contact and the second normally closed static contact; the first end of the first spring is connected to the first stop block, and the second end of the first spring is fixedly connected to the first base.

[0047] In this embodiment, the first micro switch is a passive component that changes the circuit state by external force. It is provided with a pair of normally closed static contacts, a pair of normally open static contacts and a pair of moving contacts. The static contacts are fixed inside the first switch housing. The moving contacts contact different static contacts through the mechanical movement of the spring mechanical assembly, thereby triggering a change in the switch signal.

[0048] Optionally, the first micro switch can be arranged on the surface of the counter and abut against the protective cover, or can be arranged on the protective cover and abut against the surface of the counter.

[0049] For example, reference Figure 4The counter surface refers to the side that the user can see for displaying the gas usage. There are multiple numbers or pointers on the counter surface for recording. The first micro switch can be set on the counter surface without blocking the digital display.

[0050] Under normal circumstances, the protective cover is closed, and the spring mechanical component of the first micro switch maintains a stable state under pressure, that is, the first moving contact contacts the first normally open static contact and the second moving contact contacts the second normally open static contact. At this time, the switch signal output by the first micro switch is a normally open signal.

[0051] When the protective cover is opened or damaged, the pressure originally applied to the spring mechanical assembly of the first micro switch disappears, and the spring mechanical assembly returns to its initial state under the action of the first spring, that is, the first moving contact contacts the first normally closed static contact and the second moving contact contacts the second normally closed static contact. At this time, the switch signal output by the first micro switch changes from a normally open signal to a normally closed signal, thereby changing the circuit state.

[0052] The control port of the electric valve is used to receive the switch signal sent by the signal output port of the first micro switch. When the switch signal is a normally open signal, the first micro switch is equivalent to a section of wire, which neither generates power nor interferes with the normal operation of the electric valve, enabling the gas meter to operate efficiently and stably in daily operations while reducing unnecessary energy consumption. When the switch signal changes from a normally open signal to a normally closed signal, it means that an abnormality has occurred in the first micro switch, and it is detected that the user may have privately disassembled the protective cover. In order to prevent the user from modifying the gas meter to steal gas, the electric valve takes measures to close the valve according to the normally closed signal to improve the gas meter's ability to prevent gas theft and reduce the occurrence of gas theft.

[0053] The gas meter anti-theft device of the present utility model embodiment further includes a second micro switch 500 and a judgment circuit module 600. Figure 5 The second micro switch includes a second switch housing and a second spring mechanical assembly, the second spring mechanical assembly is arranged inside the second switch housing, and the first end of the second spring mechanical assembly extends out of the second switch housing. The second micro switch is used to be arranged between the bottom surface of the counter and the gas meter, and the first end of the second spring mechanical assembly is used to abut against the bottom surface of the counter or the gas meter.

[0054] refer to Figure 6 The judgment circuit module is provided with a first input terminal i1, a second input terminal i2 and a first output terminal o1, the first input terminal is connected to the signal output port of the first micro switch, the second input terminal is connected to the signal output port of the second micro switch, and the first output terminal is connected to the control port of the electric valve.

[0055] In some embodiments, the judgment circuit module includes an AND gate unit, a first trigger unit and a second trigger unit; the input end of the first trigger unit is the first input end of the judgment circuit module, and the input end of the second trigger unit is the second input end of the judgment circuit module; the input end of the AND gate unit is respectively connected to the output end of the first trigger unit and the output end of the second trigger unit; the output end of the AND gate unit is the first output end of the judgment circuit module.

[0056] In this embodiment, it is further considered that the protective cover may trigger the first micro switch when accidentally collided or strongly vibrated. The triggering of the first micro switch cannot completely determine whether the user has stolen gas, so the counter needs to be monitored.

[0057] Specifically, a second micro switch is provided between the bottom surface of the counter and the gas meter, and the second micro switch is used to detect whether the user has disassembled and modified the counter. Optionally, the second micro switch can be provided on the bottom surface of the counter against the gas meter, or on the gas meter against the bottom surface of the counter.

[0058] The structure and triggering principle of the second micro switch are similar to those of the first micro switch. Under normal circumstances, the counter is fixed on the gas meter, and the spring mechanical component of the second micro switch maintains a stable state under pressure.

[0059] When the counter is disassembled or damaged, the pressure originally applied to the spring mechanical assembly of the second microswitch disappears, and the spring mechanical assembly returns to its initial state under the action of the spring. At this time, the switch signal output by the second microswitch changes, thereby changing the circuit state. That is, the judgment of the gas theft behavior includes two sub-conditions, the first sub-condition is that the protective cover is opened (that is, the first microswitch is triggered), and the second sub-condition is that the counter is disassembled (that is, the second microswitch is triggered). Therefore, the switch signals output by the first microswitch and the second microswitch are judged by the judgment circuit module, wherein the first trigger unit is used to detect the state of the output signal of the first microswitch, and the second trigger unit is used to detect the state of the output signal of the second microswitch.

[0060] Specifically, the judgment circuit module adopts a digital logic circuit design. The first trigger unit and the second trigger unit can be trigger devices such as RS triggers or D triggers. The states of the triggers are low level and high level, respectively corresponding to a steady state. Under the action of the input signal, the trigger can be converted from one steady state to another. When the signal output by the microswitch remains unchanged, the trigger maintains a low level. When the output signal of the microswitch changes, the state of the trigger changes from a low level to a high level.

[0061] Furthermore, the input end of the AND gate is connected to the output end of the first trigger unit and the output end of the second trigger unit respectively, and the output end of the AND gate is connected to the control port of the electric valve. The AND gate is a basic logic circuit element, and it will output a high level only when the inputs are all high level. Therefore, when the AND gate outputs a high level, it means that the first micro switch and the second micro switch are both triggered. At this time, it can be considered that the user is stealing gas, and the electric valve is controlled to close according to the high level signal output by the AND gate.

[0062] The embodiment of the utility model also provides a gas meter anti-theft device, comprising a counter, a protective cover, a gas meter and the aforementioned gas meter anti-theft device. The protective cover is arranged on the surface of the counter, and the first micro switch of the gas meter anti-theft device is arranged between the protective cover and the surface of the counter. The counter is arranged on the gas meter, and the second micro switch of the gas meter anti-theft device is arranged between the bottom surface of the counter and the gas meter. The electric valve of the gas meter anti-theft device is used to connect with the gas pipeline.

[0063] In some embodiments, the gas meter anti-gas theft device further includes a communication module, and the communication module is connected to the judgment circuit module of the gas meter anti-gas theft device.

[0064] In this embodiment, when the judgment circuit module outputs a signal to control the electric valve to close, an alarm signal can also be sent through the communication module to inform the gas company that the gas meter has been stolen, the valve has been closed, and operation and maintenance personnel need to be sent for inspection and maintenance.

[0065] The utility model embodiment also provides a gas meter anti-gas theft system, including an intelligent terminal and the aforementioned gas meter anti-gas theft device, the intelligent terminal interacts with the gas meter anti-gas theft device through the communication module of the gas meter anti-gas theft device.

[0066] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A gas meter anti-theft device, characterized in that: It includes a first micro switch and an electric valve, the electric valve is used to be externally mounted on the gas pipeline, the first micro switch includes a first switch housing and a first spring mechanical component, the first spring mechanical component is arranged inside the first switch housing, and the first end of the first spring mechanical component extends out of the first switch housing; The first micro switch is used to be arranged between the counter surface and the protective cover of the counter, and the first end of the first spring mechanical component is used to abut against the counter surface or the protective cover; The control port of the electric valve is connected to the signal output port of the first micro switch.

2. The gas meter anti-theft device according to claim 1, characterized in that: The first spring mechanical component is disposed on a first side surface inside the first switch housing; A first normally closed static contact and a second normally closed static contact are provided on a first side surface inside the first switch housing; A first normally open static contact and a second normally open static contact are provided on a second side surface inside the first switch housing, wherein the second side surface is opposite to the first side surface; The first normally closed static contact and the first normally open static contact are aligned, and the second normally closed static contact and the second normally open static contact are aligned.

3. The gas meter anti-theft device according to claim 2, characterized in that: The first spring mechanical assembly includes a first stopper, a first spring and a first dynamic contact module; The first moving contact module comprises a first base, a first moving contact and a second moving contact, wherein the first moving contact and the second moving contact are respectively arranged on two sides of the first base; The first moving contact is aligned and arranged between the first normally open static contact and the first normally closed static contact, and the second moving contact is aligned and arranged between the second normally open static contact and the second normally closed static contact; The first end of the first spring is connected to the first stop block, and the second end of the first spring is fixedly connected to the first base.

4. The gas meter anti-theft device according to claim 1, characterized in that: The gas meter anti-theft device further comprises a second micro switch and a judgment circuit module, wherein the second micro switch comprises a second switch housing and a second spring mechanical component, wherein the second spring mechanical component is arranged inside the second switch housing, and a first end of the second spring mechanical component extends out of the second switch housing; The second micro switch is used to be arranged between the bottom surface of the counter and the gas meter, and the first end of the second spring mechanical component is used to abut against the bottom surface of the counter or the gas meter; The judgment circuit module is provided with a first input terminal, a second input terminal and a first output terminal; The first input end is connected to the signal output port of the first micro switch, the second input end is connected to the signal output port of the second micro switch, and the first output end is connected to the control port of the electric valve.

5. The gas meter anti-theft device according to claim 4, characterized in that: The judgment circuit module includes an AND gate unit, a first trigger unit and a second trigger unit; The input end of the first trigger unit is the first input end of the judgment circuit module, and the input end of the second trigger unit is the second input end of the judgment circuit module; The input end of the AND gate unit is connected to the output end of the first trigger unit and the output end of the second trigger unit respectively; The output end of the AND gate unit is the first output end of the judgment circuit module.

6. A gas meter anti-theft device, characterized in that: It comprises a counter, a protective cover, a gas meter and the gas meter anti-theft device as claimed in claim 4; The protective cover is arranged on the surface of the counter, and the first micro switch of the gas meter anti-gas theft device is arranged between the protective cover and the surface of the counter; The counter is arranged on the gas meter, and the second micro switch of the gas meter anti-gas theft device is arranged between the bottom surface of the counter and the gas meter; The electric valve of the gas meter anti-gas theft device is used to be connected to the gas pipeline.

7. The gas meter anti-theft device according to claim 6, characterized in that: The gas meter anti-gas theft device further comprises a communication module, and the communication module is connected to the judgment circuit module of the gas meter anti-gas theft device.

8. A gas meter anti-theft system, characterized in that: It comprises an intelligent terminal and the gas meter anti-gas theft device as claimed in claim 7, wherein the intelligent terminal interacts with the gas meter anti-gas theft device through the communication module of the gas meter anti-gas theft device.

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