Pressure differential meter

Abstract

The invention discloses a pressure differential meter which comprises a junction box, a sensor protection box and a flow regulator. The sensor protection box is arranged on the lower surface of the junction box; the sensor protection box is connected with the flow regulator; a differential pressure sensor and a pressure sensor are arranged in the sensor protection box; both sides of the sensor protection box are respectively provided with exhaust valves; the bottom of the sensor protection box is provided with a positive pressure inlet and a negative pressure inlet; the positive pressure inlet and the negative pressure inlet are respectively connected with the flow regulator. The pressure differential meter has a simple structure and is convenient to operate; measurement accuracy is improved; moreover, working loss is low and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of flow control, in particular to a differential pressure flowmeter. technical background [0002] Differential pressure flowmeter is a serialized flowmeter with a wide range of applications and a long history. It is used in various objects in the flow measurement of closed pipelines. Differential pressure flowmeter is a type of flowmeter with a long history of application, rich and mature practical experience, complete standards and specifications, and complete varieties and specifications. It may be the only natural gas flowmeter before the 1950s. It has many deficiencies: such as general measurement accuracy, high requirements for on-site installation conditions, large pressure loss, narrow range, etc.; in response to the above deficiencies, domestic manufacturers have introduced a series of improvement methods in recent years, such as integrated differential pressure flowmeter, Fixed-value throttling pa...

AI Technical Summary

Problems solved by technology

It has many deficiencies: such as general measurement accuracy, high requirements for on-site installation conditions, large pressure loss, narrow range, etc.; in response to the above deficiencies, domestic manufacturers have introduced a series of improvement methods in recent years, such as integrated differential pressure flowmeter, Fixed-value throttling parts, replaceable orifice throttling devices, standard nozzles, etc., plus two components of differential pressure flowmeters after the 1980s: differential pressure transmitters and flow indicators have made outstanding progress. It is estimated that such flowmeters will still occupy an important position in the future

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