Principle and structure of natural gas meter

principle

The principle of the natural gas meter is to calculate the consumption of natural gas based on the volume measurement of the gas passing along the pipeline. Common natural gas meters include rotor-type natural gas meters and turbine-type natural gas meters.

The measuring principle of the rotary-wing natural gas meter is to measure the differential pressure difference between the inlet and the outlet based on the rotating connecting arm, thereby measuring the flow of natural gas. A rotating mechanical device is set up inside the casing of the natural gas meter. Natural gas enters from one port and flows out of the other port through the rotating connecting arm, and a differential pressure is generated between the two ports, which creates a twisted vortex pipe. Rotating airflow. During the rotation process, the rotation speed is directly proportional to the natural gas flow rate, so the rotation speed can be used to measure the natural gas flow rate.

The measurement principle of the turbine natural gas meter is also to measure the flow of natural gas through the differential pressure difference. It uses a rotor mounted on an axis perpendicular to the axis of the pipe, with rotating wheels forming channels and blades. When the natural gas flows through the wheel and blades, the wheel and blades will be acted upon by force and thus rotate, and the rotational speed is also proportional to the natural gas flow rate.

structure

Natural gas meters are composed of many components, including flow cylinders, floats, rotating elements, differential pressure gauges, transmission devices and display measurement mechanisms. The rotating element and the display metering mechanism are the two basic parts.

A rotating element is an element that rotates to measure natural gas flow. The rotating elements in the turbine natural gas meter include outer wheel, inner wheel and blades. There is a gap between the outer wheel and the inner wheel. When natural gas flows through, it will push the blades to rotate. The speed of rotation is transmitted to the metering device via a magnetic catcher and receiver.

The metering mechanism is a device used to calculate and display natural gas consumption. It works by reading the rotation speed of the rotating element and has an indicator to record the calculated gas consumption. The entire natural gas meter consists of a series of small dead ends and turning points. In order to reduce errors and prevent clogging, some special measures also need to be considered in the design.

in conclusion

Natural gas meters are important devices for measuring natural gas consumption, mainly including rotor-type natural gas meters and turbine-type natural gas meters. Their principles are based on differential pressure differences to measure the flow of natural gas. The structure of a natural gas meter consists of a flow cylinder, a float, a rotating element, a differential pressure gauge, a transmission device and a display and measurement mechanism. Through the detailed analysis of natural gas meters, we can better understand the engineering principles and working methods of natural gas meters, which will provide a reference for our further research and application of this technology.