Direct transmission group air tightness detection mechanism

Abstract

The invention discloses a direct transmission group air tightness detection mechanism. The direct transmission group air tightness detection mechanism is characterized by comprising an air tightness detection seat and a pressing structure, wherein a detection slot is formed in the upper surface of the air tightness detection seat; an annular step is arranged in the detection slot; a sealing washeris arranged on the upper surface of the annular step; an inflation interface communicated with a sealing cavity is formed in the surface of the air tightness detection seat; the pressing structure comprises a pressing support column, a pressing cylinder and a pressing block; the lower end of the pressing support column is fixed at a position close to the air tightness detection seat; the pressingcylinder is vertically fixed at the upper end of the pressing cylinder, and a push rod faces downwards; the pressing block is fixedly arranged on the push rod; a pressing part is arranged at the lower end of the pressing block; and the pressing part is used for pressing a direct transmission group inserted into the detection slot, and enabling an annular bump of a shaft sleeve of the direct transmission group to be pressed against the sealing washer to realize sealing. The direct transmission group air tightness detection mechanism has the advantages of simple and compact structure and easiness in matching with a manipulator to realize automatic loading and detection.

Description

technical field [0001] The invention belongs to the field of gas meters, and in particular relates to an air tightness detection mechanism of a direct transmission group. Background technique [0002] The diaphragm gas meter is mainly composed of a metering part (including two metering boxes with flexible diaphragms inside each), a transmission part (including a diaphragm, a folding plate, a vertical shaft, a rocker arm, a connecting rod, a crank, a shift fork and a valve cover) ), the counting part and the housing. [0003] The working principle of the membrane gas meter is: a diaphragm (usually made of synthetic rubber) is sealed at the center line of each metering box, and the diaphragm divides the inside of the metering box into two metering gas chambers. After the gas enters the gas meter, it alternately enters the two metering gas chambers of each metering box, so that the diaphragm (and the diaphragm clamped on the diaphragm) reciprocate, and then the linkage is real...

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Problems solved by technology

[0005] The magnetic transmission device drives the rotation of the inner magnetic sleeve through the rotation of the outer magnetic sleeve, thereby outputting the rotational kinetic energy to the outside. However, the magnetic transmission device has many components, and the assembly and transmission between the components are more complicated. The magnetic sleeve is placed on the outside of the inner magnetic sleeve, so it still has the disadvantages of heavy weight, large volume, and difficulty in miniaturization. At the same time, because the outer magnetic sleeve and the inner magnetic sleeve are magnets, they are not resistant to strong magnetic interference and are prone to appear in a magnetic environment. The transmission accuracy is poor; moreover, it is easy to cause errors in the instrument measurement due to the artificial magnetic environment (air stealing phenomenon)

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