Security diaphragm gas meter

Abstract

The utility model relates to the technical field of gas meters, in particular to a security film type gas meter which comprises a calculation processing core used for resource allocation and data processing, a flow detection module used for detecting gas flow, a temperature and pressure detection module used for detecting temperature and pressure and a gas valve module used for controlling connection and disconnection of a gas path of a gas pipe. The temperature and pressure detection module comprises a valve in-place detection circuit, a gas pipe temperature and pressure detection circuit and an onboard pressure detection circuit. According to the utility model, a series of tasks such as gas metering, on-off detection of a valve of a gas meter, temperature and pressure detection of a gas pipe, active control of on-off of a gas path of the gas pipe and the like can be realized, and the gas meter is high in detection precision, rapid in action, strong in anti-interference capability and high in safety coefficient.

Description

Technical Field

[0001] The utility model relates to the technical field of gas meters, in particular to a security-type diaphragm gas meter. Background Art

[0002] Gas is a general term for gaseous fuels, which can burn and release heat for use by urban residents and industrial enterprises. Along with the gas, there is a device for shutting down the gas usage. As a metering device for measuring the use of gas, the gas meter is usually connected to the gas pipeline at one end and to the stove at the other end. When the user uses gas, the gas enters the stove from the gas pipeline through the gas meter and the connecting pipeline. The existing gas meters generally use diaphragm gas meters, which have the characteristics of accurate measurement, large range ratio, safety and reliability, and long service life. However, the existing gas meters have low automation and have great safety hazards. When a gas leak occurs, this type of mechanical meter cannot actively identify the gas leak and actively close the gas valve. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing gas meter cannot actively identify gas leakage and actively close the gas valve, which has a great safety hazard.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a security type diaphragm gas meter, comprising a computing and processing core for resource allocation and data processing, a flow detection module for detecting gas flow, a temperature and pressure detection module for detecting temperature and pressure, and a gas valve module for controlling the on-off of the gas pipeline. The output end of the flow detection module is connected to the computing and processing core, the temperature and pressure detection module comprises a valve in place detection circuit, a gas pipe temperature and pressure detection circuit and an onboard pressure detection circuit, the detection end of the valve in place detection circuit is arranged at the valve switch position of the corresponding gas meter, the valve in place detection circuit is connected to the computing core, the detection end of the gas pipe temperature and pressure detection circuit is arranged in the gas pipe connected to the valve of the corresponding gas meter, the gas pipe temperature and pressure detection circuit is connected to the computing and processing core, the detection end of the onboard pressure detection circuit is arranged inside the corresponding gas meter, the onboard pressure detection circuit is connected to the computing and processing core, and the signal input end of the gas valve module is connected to the computing and processing core.

[0005] When the utility model is working, it can realize a series of tasks such as gas metering, switch detection of the gas meter valve, temperature and pressure detection of the gas pipe, and active control of the on-off of the gas path of the gas pipe, etc. It has high detection accuracy, rapid action, strong anti-interference ability and high safety factor.

[0006] Preferably, the flow detection module includes a magnetic sensor U6, a magnetic sensor U7, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C50 and a capacitor C56, the VDD pin of the magnetic sensor U6 is connected to the power supply and is connected to the GND pin of the magnetic sensor U6 through the capacitor C27, the GND pin of the magnetic sensor U6 is grounded, the OUT pin of the magnetic sensor U6 is grounded through the capacitor C30 and is grounded through the capacitor C50, the OUT pin of the magnetic sensor U6 is connected to the PB12 port of the computing and processing core, the VDD pin of the magnetic sensor U7 is connected to the power supply and is connected to the GND pin of the magnetic sensor U7 through the capacitor C28, the GND pin of the magnetic sensor U7 is grounded, the OUT pin of the magnetic sensor U7 is grounded through the capacitor C29 and is grounded through the capacitor C56, and the OUT pin of the magnetic sensor U7 is connected to the PC15 port of the computing and processing core.

[0007] When the utility model is working, the interference of the external magnetic field can be avoided by arranging two magnetic sensors, so that the computing processing core can judge the external situation by processing the output signals of the two magnetic sensors, and it can prevent illegal personnel from using magnets to interfere with the normal operation of the gas meter, and the anti-interference ability is strong.

[0008] Preferably, the valve in-position detection circuit includes a valve position detection module P6, a resistor R43, a capacitor C33 and a capacitor C46, ​​the first end of the valve position detection module P6 is connected to the PA15 port of the computing and processing core and is grounded through the capacitor C33, the second end of the valve position detection module P6 is connected to the PD10 port of the computing and processing core through the resistor R43, the second end of the valve position detection module P6 is connected to the PA15 port of the computing and processing core through the resistor R43 and is grounded through the capacitor C46, ​​the gas pipe temperature and pressure detection circuit includes a temperature and pressure detection module P7, a resistor R46 and a capacitor C35, the first end of the temperature and pressure detection module P7 is connected to the PE9 port of the computing and processing core and is connected to the PA15 port of the computing and processing core through the resistor R46, the first end of the temperature and pressure detection module P7 is grounded through the capacitor C35, and the second end of the temperature and pressure detection module P7 is grounded.

[0009] When this embodiment is working, it can detect the switch of the valve of the gas meter and the temperature and humidity in the gas pipe at the same time, with high detection accuracy.

[0010] Preferably, the on-board pressure detection circuit includes an air pressure detection chip U20, a resistor R96, a resistor R97 and a capacitor C64, the VDDIO port of the air pressure detection chip U20 is connected to the PA15 port of the computing and processing core and is grounded through the capacitor C64, the SDO port of the air pressure detection chip U20 is grounded through the resistor R96 and connected to the PA15 port of the computing and processing core through the resistor R97, the SDA port of the air pressure detection chip U20 is connected to the PD10 port of the computing and processing core, and the SCL port of the air pressure detection chip U20 is connected to the PE9 port of the computing and processing core.

[0011] Preferably, the gas valve module includes a valve driving chip U5, a gas valve module P3, a resistor R103, a resistor R104, a capacitor C24, a diode TVS1, a diode D21 and a diode D22, the SLEEP port of the valve driving chip U5 is connected to the PB3 port of the computing and processing core, the IN1 port of the valve driving chip U5 is connected to the PB2 port of the computing and processing core, the IN2 port of the valve driving chip U5 is connected to the PD9 port of the computing and processing core, and the OUT1 port of the valve driving chip U5 is connected to the gas valve module P3. The first end of the gas valve module P3 is connected to the first end of the gas valve module P3, the OUT2 port of the valve driving chip U5 is connected to the second end of the gas valve module P3, the first end of the gas valve module P3 is connected to the second end of the gas valve module P3 through the diode TVS1, the first end of the gas valve module P3 is connected to the cathode of the diode D21, the cathode of the diode D22 and the first end of the resistor R104 through the resistor R103, the second end of the gas valve module P3 is connected to the anode of the diode D21, the anode of the diode D22 and the second end of the resistor R104 through the capacitor C24.

[0012] The beneficial technical effects of the utility model include:

[0013] 1. The utility model can realize a series of tasks such as gas metering, switch detection of gas meter valves, temperature and pressure detection of gas pipes, and active control of gas pipeline gas circuit on and off, with high detection accuracy, rapid action, strong anti-interference ability and high safety factor.

[0014] 2. The utility model can avoid interference from external magnetic fields by arranging two magnetic sensors, so that the computing processing core can judge external conditions by processing the output signals of the two magnetic sensors, and can prevent illegal personnel from using magnets to interfere with the normal operation of the gas meter, and has strong anti-interference ability.

[0015] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of a security type diaphragm gas meter;

[0018] Figure 2 This is a circuit diagram of the computing processing core;

[0019] Figure 3 It is the circuit structure diagram of the flow detection module;

[0020] Figure 4 It is the circuit structure diagram of the valve in-position detection circuit and the gas pipe temperature and pressure detection circuit;

[0021] Figure 5 This is the circuit structure diagram of the onboard pressure detection circuit;

[0022] Figure 6 This is the circuit structure diagram of the gas valve module.

[0023] Among them: 1. Computing and processing core, 2. Flow detection module, 3. Temperature and pressure detection module, 31. Valve in place detection circuit, 32. Gas pipe temperature and pressure detection circuit, 33. Onboard pressure detection circuit, 4. Gas valve module. DETAILED DESCRIPTION

[0024] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0025] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0026] Please refer to the attached Figure 1 The present embodiment discloses a security-type diaphragm gas meter, including a computing processing core 1 for resource allocation and data processing, a flow detection module 2 for detecting gas flow, a temperature and pressure detection module 3 for detecting temperature and pressure, and a gas valve module 4 for controlling the on-off of a gas pipeline. The following is a detailed description with reference to the accompanying drawings.

[0027] Please refer to the attached Figure 2 and attached Figure 3In this embodiment, the flow detection module 2 includes a magnetic sensor U6, a magnetic sensor U7, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C50 and a capacitor C56. The VDD pin of the magnetic sensor U6 is connected to the power supply and is connected to the GND pin of the magnetic sensor U6 through the capacitor C27. The GND pin of the magnetic sensor U6 is grounded. The OUT pin of the magnetic sensor U6 is grounded through the capacitor C30 and is grounded through the capacitor C50. The OUT pin of the magnetic sensor U6 is connected to the PB12 port of the computing processing core 1. The VDD pin of the magnetic sensor U7 is connected to the power supply and is connected to the GND pin of the magnetic sensor U7 through the capacitor C28. The GND pin of the magnetic sensor U7 is grounded. The OUT pin of the magnetic sensor U7 is grounded through the capacitor C29 and is grounded through the capacitor C56. The OUT pin of the magnetic sensor U7 is connected to the PC15 port of the computing processing core 1.

[0028] When this embodiment is working, the interference of the external magnetic field can be avoided by arranging two magnetic sensors, so that the computing processing core 1 can judge the external situation by processing the output signals of the two magnetic sensors, which can prevent illegal personnel from using magnets to interfere with the normal operation of the gas meter and has strong anti-interference ability.

[0029] Please refer to the attached Figure 2 and attached Figure 4 Preferably, the valve in-position detection circuit 31 includes a valve position detection module P6, a resistor R43, a capacitor C33 and a capacitor C46, ​​the first end of the valve position detection module P6 is connected to the PA15 port of the computing and processing core 1 and is grounded through the capacitor C33, the second end of the valve position detection module P6 is connected to the PD10 port of the computing and processing core 1 through the resistor R43, the second end of the valve position detection module P6 is connected to the PA15 port of the computing and processing core 1 through the resistor R43 and is grounded through the capacitor C46, ​​the gas pipe temperature and pressure detection circuit 32 includes a temperature and pressure detection module 3P7, a resistor R46 and a capacitor C35, the first end of the temperature and pressure detection module 3P7 is connected to the PE9 port of the computing and processing core 1 and is connected to the PA15 port of the computing and processing core 1 through the resistor R46, the first end of the temperature and pressure detection module 3P7 is grounded through the capacitor C35, and the second end of the temperature and pressure detection module 3P7 is grounded.

[0030] When this embodiment is working, it can realize the switch detection of the valve of the gas meter. When the valve is closed, it can promptly remind the user to check the valve to avoid gas leakage caused by accidental ventilation. At the same time, it can detect the temperature and humidity in the gas pipe with high detection accuracy.

[0031] Please refer to the attached Figure 2 and attached Figure 5In a specific implementation, the onboard pressure detection circuit 33 includes an air pressure detection chip U20, a resistor R96, a resistor R97 and a capacitor C64. The VDDIO port of the air pressure detection chip U20 is connected to the PA15 port of the computing and processing core 1 and is grounded through the capacitor C64. The SDO port of the air pressure detection chip U20 is grounded through the resistor R96 and is connected to the PA15 port of the computing and processing core 1 through the resistor R97. The SDA port of the air pressure detection chip U20 is connected to the PD10 port of the computing and processing core 1. The SCL port of the air pressure detection chip U20 is connected to the PE9 port of the computing and processing core 1.

[0032] Please refer to the attached Figure 2 and attached Figure 6 Preferably, the gas valve module 4 includes a valve driver chip U5, a gas valve P3, a resistor R103, a resistor R104, a capacitor C24, a diode TVS1, a diode D21 and a diode D22, the SLEEP port of the valve driver chip U5 is connected to the PB3 port of the computing and processing core 1, the IN1 port of the valve driver chip U5 is connected to the PB2 port of the computing and processing core 1, the IN2 port of the valve driver chip U5 is connected to the PD9 port of the computing and processing core 1, and the OUT1 port of the valve driver chip U5 is connected to the gas The first end of the valve P3 is connected, the OUT2 port of the valve driving chip U5 is connected to the second end of the gas valve P3, the first end of the gas valve P3 is connected to the second end of the gas valve P3 through the diode TVS1, the first end of the gas valve P3 is connected to the cathode of the diode D21, the cathode of the diode D22 and the first end of the resistor R104 through the resistor R103, the second end of the gas valve P3 is connected to the anode of the diode D21, the anode of the diode D22 and the second end of the resistor R104 through the capacitor C24.

[0033] The beneficial technical effects of this embodiment include: being able to realize a series of tasks such as gas metering, switch detection of the gas meter valve, temperature and pressure detection of the gas pipe, and active control of the on-off of the gas pipe gas path, with high detection accuracy, rapid action, strong anti-interference ability and high safety factor.

[0034] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A security type diaphragm gas meter, characterized in that: The invention comprises a computing processing core (1) for resource allocation and data processing, a flow detection module (2) for detecting gas flow, a temperature and pressure detection module (3) for detecting temperature and pressure, and a gas valve module (4) for controlling the on-off of a gas pipeline. The output end of the flow detection module (2) is connected to the computing processing core (1). The temperature and pressure detection module (3) comprises a valve in-position detection circuit (31), a gas pipeline temperature and pressure detection circuit (32) and an onboard pressure detection circuit (33). The detection end of the valve in-position detection circuit (31) is arranged at The valve switch portion of the corresponding gas meter, the valve position detection circuit (31) is connected to the computing core, the detection end of the gas pipe temperature and pressure detection circuit (32) is arranged in the gas pipe connected to the valve of the corresponding gas meter, the gas pipe temperature and pressure detection circuit (32) is connected to the computing core (1), the detection end of the onboard pressure detection circuit (33) is arranged inside the corresponding gas meter, the onboard pressure detection circuit (33) is connected to the computing core (1), and the signal input end of the gas valve module (4) is connected to the computing core (1).

2. A security diaphragm gas meter according to claim 1, characterized in that: The flow detection module (2) includes a magnetic sensor U6, a magnetic sensor U7, a capacitor C27, a capacitor C28, a capacitor C29, a capacitor C30, a capacitor C50 and a capacitor C56, a VDD pin of the magnetic sensor U6 is connected to a power supply and is connected to a GND pin of the magnetic sensor U6 through the capacitor C27, the GND pin of the magnetic sensor U6 is grounded, an OUT pin of the magnetic sensor U6 is grounded through the capacitor C30 and is grounded through the capacitor C50, the OUT pin of the magnetic sensor U6 is connected to a PB12 port of a computing processing core (1), a VDD pin of the magnetic sensor U7 is connected to a power supply and is connected to a GND pin of the magnetic sensor U7 through the capacitor C28, the GND pin of the magnetic sensor U7 is grounded, the OUT pin of the magnetic sensor U7 is grounded through the capacitor C29 and is grounded through the capacitor C56, and the OUT pin of the magnetic sensor U7 is connected to a PC15 port of the computing processing core (1).

3. A security diaphragm gas meter according to claim 1, characterized in that: The valve position detection circuit (31) comprises a valve position detection module P6, a resistor R43, a capacitor C33 and a capacitor C46. The first end of the valve position detection module P6 is connected to the PA15 port of the computing and processing core (1) and is grounded through the capacitor C33. The second end of the valve position detection module P6 is connected to the PD10 port of the computing and processing core (1) through the resistor R43. The second end of the valve position detection module P6 is connected to the PA15 port of the computing and processing core (1) through the resistor R43 and is grounded through the capacitor C46. The gas pipe temperature and pressure detection circuit (32) comprises a temperature and pressure detection module (3) P7, a resistor R46 and a capacitor C35. The first end of the temperature and pressure detection module (3) P7 is connected to the PE9 port of the computing and processing core (1) and is connected to the PA15 port of the computing and processing core (1) through the resistor R46. The first end of the temperature and pressure detection module (3) P7 is grounded through the capacitor C35. The second end of the temperature and pressure detection module (3) P7 is grounded.

4. A security diaphragm gas meter according to claim 1, characterized in that: The onboard pressure detection circuit (33) includes an air pressure detection chip U20, a resistor R96, a resistor R97 and a capacitor C64, the VDDIO port of the air pressure detection chip U20 is connected to the PA15 port of the computing and processing core (1) and is grounded through the capacitor C64, the SDO port of the air pressure detection chip U20 is grounded through the resistor R96 and is connected to the PA15 port of the computing and processing core (1) through the resistor R97, the SDA port of the air pressure detection chip U20 is connected to the PD10 port of the computing and processing core (1), and the SCL port of the air pressure detection chip U20 is connected to the PE9 port of the computing and processing core (1).

5. A security diaphragm gas meter according to claim 1, characterized in that: The gas valve module (4) comprises a valve driving chip U5, a gas valve P3, a resistor R103, a resistor R104, a capacitor C24, a diode TVS1, a diode D21 and a diode D22, the SLEEP port of the valve driving chip U5 is connected to the PB3 port of the computing and processing core (1), the IN1 port of the valve driving chip U5 is connected to the PB2 port of the computing and processing core (1), the IN2 port of the valve driving chip U5 is connected to the PD9 port of the computing and processing core (1), and the OUT1 port of the valve driving chip U5 is connected to the The first end of the gas valve P3 is connected, the OUT2 port of the valve driving chip U5 is connected to the second end of the gas valve P3, the first end of the gas valve P3 is connected to the second end of the gas valve P3 through the diode TVS1, the first end of the gas valve P3 is connected to the cathode of the diode D21, the cathode of the diode D22 and the first end of the resistor R104 through the resistor R103, the second end of the gas valve P3 is connected to the anode of the diode D21, the anode of the diode D22 and the second end of the resistor R104 through the capacitor C24.

Images