Gas meter with anti-interference function

Abstract

A gas meter with an anti-interference function relates to the technical field of gas detection devices and comprises an upper shell, a lower shell and an ultrasonic module, a kidney-shaped groove is formed in the lower shell, the ultrasonic module is arranged in the kidney-shaped groove, and the upper shell and the lower shell are vertically arranged and detachably and fixedly connected. A mounting structure and an anti-interference structure are arranged in the lower shell, the anti-interference structure comprises two arc-shaped sections and four straight sections, the straight sections are detachably and fixedly connected with the two sides of the arc-shaped sections respectively, the straight sections are detachably and fixedly connected with the lower shell, and the adjacent straight sections abut against each other; the mounting structure comprises elastic limiting assemblies symmetrically arranged on the two opposite sides of the ultrasonic module, each elastic limiting assembly comprises an abutting plate, a telescopic guide sliding structure and a fixing plate, and the telescopic guide sliding structures are arranged between the abutting plates and the fixing plates and elastically connected with the abutting plates and the fixing plates. According to the invention, the ultrasonic can be detachably and stably installed in the lower shell, and the anti-interference structure plays a shielding role, so that the measurement precision is ensured.

Description

technical field [0001] The invention relates to the technical field of gas detection devices, in particular to a gas meter with an anti-interference function. Background technique [0002] The gas meter in the prior art is basically a mechanical meter (mechanical membrane gas meter), and its counting principle is to use the flow of gas to drive the counting wheel to rotate for counting. Due to the mechanical rotation structure, there is a large counting error range (especially inaccurate measurement in low flow areas), larger meter body (occupies a larger installation space), aging after a long time of use reduces the measurement accuracy and other shortcomings. With the advancement of technology, a new generation of ultrasonic gas meters (gas volume meters) has now appeared. The reliability and accuracy of the ultrasonic module installation structure are low. For example, some existing installation methods are fixed welding methods. Details Two relatively vertical fixing p...

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Problems solved by technology

[0002] The gas meter in the prior art is basically a mechanical meter (mechanical membrane gas meter), and its counting principle is to use the flow of gas to drive the counting wheel to rotate for counting. Due to the mechanical rotation structure, there is a large counting error range (especially inaccurate measurement in low flow areas), large meter body (occupies a large installation space), aging after a long time of use reduces the measurement accuracy, etc.

With the advancement of technology, a new generation of ultrasonic gas meters (gas volume meters) has appeared. The reliability and accuracy of the ultrasonic module installation structure are relatively low. For example, some existing installation methods are fixed welding methods, which are detailed Two relatively vertical fixing plates are welded on opposite sides of the ultrasonic module, and then the fixing plate is welded to the inner wall of the gas meter. Due to the small area at the connection position between the fixing plate and the ultrasonic module, the structural stability is poor. Concentrated force, when the gas meter is impacted by external force, the connection between the fixed plate and the ultrasonic module is easily damaged, causing the ultrasonic module to be skewed, and deviations are likely to occur when detecting gas flow. In addition, the shell structure of the gas meter is simple, and the ultrasonic module Susceptible to interference from external magnetic fields, affecting measurement accuracy, therefore, there is room for improvement

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