High-precision wide-range diaphragm gas meter

Abstract

The invention provides a high-precision wide-range diaphragm gas meter, which includes a core, the core includes a bellows, two skins, two bellows, a valve cover and a four-axis joint rotation system, the bellows includes a valve seat and two Two measuring chambers, two membranes are respectively located in the two measuring chambers; each said membrane is connected with the corresponding four-axis joint rotation system, the vertical shaft is fixedly connected with one end of the rocker, and the other end of the rocker is hinged to the connecting rod The other end of the connecting rod is hinged to the crank. The central axis of the crank is the third rotating shaft. The central crank wheel is set on the central axis. The cover rotates synchronously around the central axis, the deviation between the installation limit position of the film and the optimum limit position is within -0.5mm to +0.5mm, the angle error of the rocker is within -0.8° to +0.8°, and the fine-tuning device is installed on the central crank wheel. The gas meter has good measurement accuracy and high measurement precision, which expands the scope of application of the high-precision and wide-range membrane gas meter.

Description

technical field [0001] The invention relates to the technical field of gas meter equipment, in particular to a high-precision and wide-range membrane gas meter. Background technique [0002] In the existing high-precision wide-range membrane gas meter, because the membrane is a flexible rubber part and the transmission mechanism is composed of plastic parts, it is difficult to guarantee the accuracy in the manufacturing process. By changing the gear sleeve that drives the counter, adjust the number of teeth and use the gas meter standard Checking equipment checks meet the requirements. Due to the wide error distribution and the limited number of gears, there is a certain range and gear for adjusting the accuracy of the gas meter, so the accuracy is not enough. Contents of the invention [0003] The purpose of the present invention is to provide a high-precision and wide-range membrane gas meter to improve the poor operation stability of the high-precision and wide-range m...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-precision and wide-range membrane gas meter to improve the poor operation stability of the high-precision and wide-range membrane gas meter in the prior art, which leads to poor measurement accuracy and low precision of the gas meter.

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