Gas-measuring apparatus

Abstract

The invention discloses a gas-measuring apparatus which solves the problem that the conventional gas-measuring apparatus has a relatively poor measuring sensitivity, and adopts the technical measures as follows: the gas-measuring apparatus comprises a machine core body, wherein two air cavities which are mutually separated are arranged in the machine core body; the two air cavities have openings which are formed in the upper end part of the machine core body; a valve is arranged in each of the air cavities; the valves are connected with the inner ends of toggle joints inserted into the machine core body; the outer end parts of the toggle joints extend out of the outer side of the machine core body; swinging heads are fixed at the outer ends of the toggle joints; the gas-measuring apparatus is further characterized in that two sliding covers are arranged at the upper end part of the machine core body; the swinging heads on the two toggle joints are connected with the two sliding covers respectively; the two sliding covers are driven by the swinging heads to cover the openings of the two air cavities alternatively, or to be separated from the openings of the two air cavities alternatively; each swinging head adopts a separated structure, and comprises a swinging head body and a replaceable auxiliary head; connecting bodies on the auxiliary heads are used for being in transmission connection with the sliding covers; the positions of the connecting bodies on different auxiliary heads have deviation; the positional deviations of the connecting bodies on the auxiliary heads can be utilized for compensating the transmission error between the swinging heads and the sliding covers.

Description

technical field [0001] The invention relates to a gas flow meter for measuring gas flow. Background technique [0002] Chinese Utility Model Patent (Patent No.: 201220161666.1) This utility model discloses a gas flow meter outlet structure, which solves the problem of inconvenient connection between the gas outlet pipe and the movement on the existing gas flow meter and the excessive occupation of the outside of the movement space problem. The technical solution adopted: an air outlet structure of a gas flow meter, which is located in the core and the air outlet pipe, including an air outlet connected to the distribution chamber in the core, and the inside of the air outlet pipe communicates with the air outlet. It is characterized in that the outlet The trachea is in the shape of "L", and the structure between the trachea and the core is a split structure. There is a clamping structure between the trachea and the core. The clamping structure makes the inlet part of the tra...

AI Technical Summary

Problems solved by technology

[0004] Because the rotary valve is a single structure, its volume is relatively large, and the friction between the rotary valve and the upper end surface of the core body during the rotation process makes the rotary valve appear to be laborious when rotating, while the rotary valve The rotation is a transmission part that drives the metering device on the meter. In the case of poor rotation of the rotary valve, this will also affect the accuracy of the meter.

The sensitivity of the meter with this structure is relatively poor, and it will also cause large errors in measurement.

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