Gas Pressure Monitoring Alarm Interlock Shut-off Device

Gas Cut-off Protection System

I. Development Background

The development of the QD7 Gas Cut-off Protection System is based on the requirements of the Emergency Management Department's Order No. 10. All production industries with gas pipelines are now required to install high and low-pressure alarms for gas pipelines, and must reserve functions such as data uploading as specified. The pressure alarm is interlocked with a shut-off valve, automatically cutting off the solenoid valve when the pressure is too high.

Beijing Hengtaishi Instruments specializes in the research, development, and production of customized pressure alarms for gas cut-off protection systems. The technology is now mature, with nationwide shipping support to meet safety inspection and customer requirements.

II. Functional Overview

1. Basic Principle

The natural gas pressure monitoring and alarm device typically consists of a pressure sensor, signal processing circuit, alarm, and power supply. Its working principle involves converting the pressure signal in the pipeline into an electrical signal via the pressure sensor. The signal is then amplified, filtered, and compared through the signal processing circuit, ultimately triggering the alarm to alert personnel for timely action.

2. Functional Features

a. Real-time Monitoring: The natural gas pressure monitoring and alarm device can monitor pipeline pressure in real time, recording pressure values and trends to help personnel stay informed about pipeline operation status.

b. Overpressure Alarm: When the pipeline pressure exceeds the preset value, the device immediately triggers the alarm to alert personnel to take measures, ensuring pipeline safety. It can also automatically cut off the solenoid valve.

3. Usage Instructions

a. Installation: Install the device at key positions of the natural gas pipeline to ensure the sensor accurately detects pipeline pressure.

b. Parameter Settings: Set alarm thresholds, alarm methods, and other parameters according to actual needs. The alarm values can be modified independently.

c. Operation Monitoring: Once the device is activated normally, it automatically monitors pipeline pressure. When an alarm is triggered, personnel must take timely action.

Main Product Features:

1. Intelligent digital display pressure measurement and control product;

2. On-site LCD real-time display of current pressure value, solenoid valve status, concentration value, and other information;

3. Flexible use, simple operation, easy debugging, safe and reliable;

4. Alarm thresholds can be directly modified on the panel;

5. Communication method uses NB-IOT;

6. System parameters can be set, modified, and checked at any time;

7. Accurate readings, fast response speed, integrated sound and light alarm;

8. Simple and convenient wall-mounted installation;

9. Instantly detects abnormal pipeline pressure and quickly cuts off the safety solenoid valve, effectively preventing production line damage caused by overpressure & underpressure;

10. Supports 1-4 point control, allowing any single point monitoring task to be activated;

11. Compatible with 100/200/400/600Kpa pressure transmitters;

12. Supports control of normally open and normally closed solenoid valves;

13. Supports remote alarm (phone alarm, SMS alarm), this function is optional.