Medical oxygen metering instrument metering standard device

Abstract

A medical oxygen metering instrument metering standard device belongs to the technical field of medical apparatuses. The medical oxygen metering instrument metering standard device comprises an oxygen steel cylinder with cylinder pressure lower than 5MPa, a power supply and an oxygen pipe. The medical oxygen metering instrument metering standard device is characterized in that the oxygen pipe comprises a low-pressure flowmeter calibrating and verifying pipe, a high-pressure floater flowmeter calibrating and verifying pipe, a low-pressure gauge calibrating and verifying pipe with pressure of 0-4MPa, and a middle-and-high-pressure gauge calibrating and verifying pipe with pressure in 4-30MPa; the oxygen steel cylinder is connected with an air inlet; the oxygen pipe is leaded out of an air inlet pressure sensor and is connected with the four calibrating and verifying pipes; and the four calibrating and verifying pipes are connected in parallel. The medical oxygen metering instrument metering standard device has advantages of combining a pressure verification table with a flow standard device, realizing integration and high portability in metering, realizing higher precision, high vibration resistance and higher tilting resistance through advanced electronic equipment, avoiding field assembling, and greatly improving working efficiency and convenience.

Description

technical field [0001] The invention relates to a measurement standard device for medical oxygen measuring instruments, specifically, a pressure calibration table and a flow standard device are integrated, and a medical oxygen measuring instrument measurement standard device with higher precision belongs to the technical field of medical devices. Background technique [0002] At present, elastic element type general pressure gauges, buoy type oxygen inhalers and medical oxygen inhalers and other measuring instruments used in hospitals and other places are included in the national compulsory verification catalogue. The pressure calibration table and independent flow standard device used are poor in portability and the on-site assembly time is long. It is troublesome to replace the pointer precision pressure gauge. The flow standard device used is a float flow meter, which has a short service life and needs to be replaced frequently. At the same time, the precision of the stan...

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Problems solved by technology

[0002] At present, elastic element type general pressure gauges, buoy type oxygen inhalers and medical oxygen inhalers and other measuring instruments used in hospitals and other places are included in the national compulsory verification catalogue. The pressure calibration table and independent flow standard device used are poor in portability and the on-site assembly time is long. It is troublesome to replace the pointer precision pressure gauge. The flow standard device used is a float flow meter, which has a short service life and needs to be replaced frequently. At the same time, the precision of the standard equipment is high, and there must be no vibration or dumping when carrying it, which brings a lot of inconvenience to the on-site calibration.

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