Dc Relay,Dc Power Relay,Condenser Contactor,Voltage Protection Relay NanJing QUANNING electric Co.,Ltd , https://www.quanningtrading.com
Description
The utility model belongs to a gas meter, in particular to a gas meter with a pressure sensing device.
Background of the invention
With the development of the city, natural gas pipelines are slowly connecting to thousands of households, and the safe use of domestic gas meters is gradually attracting people's attention. In China, the pressure of urban pipe network is 0.05-0.4MPa, after adjusting to 2-3kPa (generally 2. 8kPa), it enters the pipeline before the stove; and the rated outlet pressure of the natural gas stove is 2kPa, once the pressure regulator Failure or other reasons cause the pressure of 0.05 to 0.4 MPa to be stringed into the low-pressure gas pipeline, which will cause the natural gas stove to leak due to the high pressure, and there is a serious risk of explosion.
Summary of the invention
The utility model provides a gas meter with a pressure sensing device which can easily and conveniently detect the pressure of a gas meter.
In order to solve the above technical problem, the basic idea of ​​adopting the technical solution of the utility model is: a gas meter with a pressure sensing device, comprising a pressure sensing device 4 and a control circuit board 8, the sensing end of the pressure sensing device 4 is located in the gas meter Inside the casing, the output end of the pressure sensing device 4 is located outside the gas meter casing, and the output end is welded to the control circuit board; the control circuit board is connected by the IC card reading and writing device 1, the control chip 2, the inquiry device 3, The liquid crystal display device 6, the valve control device 5 and the power management device 7, the IC card read/write device 1 is bidirectionally connected to the control chip 2, and the control chip 2 is unidirectionally connected to the valve control device 5, the control chip 2 The control chip 2 is unidirectionally connected to the inquiry device 3, the control chip 2 is unidirectionally connected to the pressure sensing device 4, and the control chip 2 is unidirectionally connected to the power management device 7. 
The picture shows the structure of the control circuit board
Further, the control device is a valve control device. The display device is a liquid crystal display. Also included is a power management device that is unidirectionally coupled to the control chip. The power management device is a lithium battery. Also included is a query device that is unidirectionally coupled to the control chip.
During normal operation, the pressure sensing device 4 does not send a signal to the circuit board. At this time, the gas meter valve is in an open state, allowing normal use; when the working pressure of the gas meter reaches 5 kPa, it is a critical pressure value, and the corresponding period is off. The valve time is 1s, that is, the gas pressure value of the gas meter exceeds 5kPa, and the valve closing command can be executed for 1s, so as to avoid the valve closing effect caused by the gas pressure fluctuation of the gas pipeline, and the buzzer will emit '嘀, 嘀...' The alarm sounds to indicate that the user's air pressure is abnormal; when the working pressure of the gas meter reaches 10 kPa, it is the second critical pressure value. At this time, the corresponding two-stage closing time is 0.2 s, that is, the gas meter pressure value exceeds 10 kPa and can last 0. 2s and then execute the valve closing command, this is also to avoid the valve closing caused by the gas pressure fluctuation of the gas pipeline, and the buzzer will emit an alarm sound of '嘀嘀, 嘀嘀...', indicating that the user is abnormal in air pressure; When it reaches 20kPa, it is the critical pressure value of three sections. At this time, the corresponding three-stage closing time is 0s, that is, the valve closing command should be executed immediately after the gas meter pressure exceeds 20kPa, and the buzzer will be issued. The continuous alarm sound of '嘀～' prompts the user that the air pressure is abnormal. Please close the pipeline valve in time; press the button to turn off the alarm sound, long press to open the valve, if the air pressure abnormal valve alarm occurs again, please close the pipeline valve in time, and Inform the gas company to conduct inspection and maintenance in a timely manner.
The pressure sensing device 4 has the advantages of high precision, high sensitivity, strong sealing, etc.; it has a high pressure to quickly close the valve, thereby blocking high-pressure gas into the gas stove and other low-pressure gas equipment in time, preventing gas leakage and enhancing gas consumption. Safety; after the pressure is closed, the gas meter will emit a continuous buzzer alarm sound, which will serve the user.
After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art: the pressure sensor device is installed inside the gas meter, and the pressure of the domestic gas pipeline can be monitored in real time, once the maximum pressure of the gas stove is exceeded, The valve closing alarm will be immediately stopped, which will prevent the pipeline pressure directly applied to the natural gas stove, and provide a real guarantee for the user.
Gas meter with pressure sensing device
There is no limit to creativity, and the instrument is invented. Today we introduce a national invention patent, a gas meter with a pressure sensing device. The patent was applied by Hebei Huatong Gas Equipment Co., Ltd. and was authorized to be announced on April 5, 2017.