Force value transfer device for anti-shock pressure meter

Abstract

The force value transfer device for anti-shock pressure meter includes damping assembly, fork spring, and enlarging and indicating mechanism. The fork spring consists of fork spring seat, right and left reeds connected to the fork spring seat, and central pushing spring integrally between the right and the left reeds. The fork spring seat has push rod guide hole, membrane positioning hole, push rod and membrane; the push rod has input end matching the membrane and output end matching the central pushing spring; the diameter ratio between the push rod output end and the input end is within 1.167-4.167; and pressure gage has maximum indication range of 160-6MPa.

Description

technical field [0001] The invention relates to a pressure measurement transmission device, in particular to a transmission device for measuring the force value of an anti-seismic pressure gauge. Background technique [0002] Because the anti-seismic pressure gauge can withstand instantaneous pressure shock and measure pulsating pressure, it is mainly used in places with particularly harsh environments and large vibrations, such as fracturing and cementing equipment in oil production. The existing anti-seismic pressure gauge uses the fork spring as the elastic element. The external pressure is transmitted to the ejector rod through the damping assembly. The ejector rod is supported by the diaphragm and transmits the pressure to the fork spring. The fork spring deforms and is converted into angular displacement through the amplifying indicator mechanism. , and then read the pressure value from the dial through the pointer; since the transmission ratio ...

AI Technical Summary

Problems solved by technology

The existing anti-seismic pressure gauge uses the fork spring as the elastic element. The external pressure is transmitted to the ejector rod through the damping assembly. The ejector rod is supported by the diaphragm and transmits the pressure to the fork spring. The fork spring deforms and is converted into angular displacement through the amplifying indicator mechanism. , and then read the pressure value from the dial through the pointer; since the transmission ratio of the sector gear and the central gear of the amplifying indicator mechanism is a fixed value, when the external pressure values ​​are different, the deformation amount produced by the fork spring is required to be basically kept at a certain level Within the scope of the scale, and consistent with the transmission ratio of the enlarged indicating mechanism; in order to meet the above requirements, for different ranges of pressure values, the existing structure is realized by changing the size of the left and right reeds of the fork spring; when the indicated pressure value is relatively When it is large, it is necessary to increase the size and thickness of the left and right reeds accordingly. For example, when the maximum indication value of the pressure gauge is 120MPa, the thickness of the left and right reeds is about 3.2mm; when the indicated pressure value is small, it is necessary to reduce the thickness of the left and right reeds accordingly. Dimensions, such as when the maximum indication value of the pressure gauge is 16MPa, the thickness of the left and right reeds is about 1.5mm; there are 7 specifications in the pressure range from 16MPa to 120MPa. And material requirements are high, processing technology and heat treatment are difficult to control, the corresponding scrap rate is high, the inventory of each specification will be large, and the manufacturing cost will increase; for low-pressure fork springs, due to left and right The reed is thin, has poor resilience and is easy to break. Pressure gauges below 16MPa cannot be manufactured, and the shape and position errors and surface roughness caused by processing will directly affect the strength and accuracy of the fork spring. The stability and adjustment of the indication value are very difficult. It is difficult to meet the requirements of the standard, and it is necessary to protect the fork spring by increasing damping, which will increase various errors caused by damping such as damping ratio and pulsation error, and reduce the accuracy of the pressure gauge

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