Pressure sensing device

Abstract

The invention discloses a pressure sensing device. A base is fixed in a wall body, wherein an axial through hole is formed in the center of the base; a membrane is fixedly arranged on the periphery ofthe base; a flow guide hole and a channel which are communicated are formed in the base corresponding to the membrane; a sensing cavity is formed between the membrane and the flow guide hole; the sensing cavity, the flow guide hole and the channel are filled with media; a pressure transmission device is formed; a sensor is arranged on the outer side of the channel; and the sensor is fixed on thebase; the membrane transmits pressure information to the sensor through the pressure transmission device. According to the pressure sensing device, the pressure information of the hole bottom is collected and monitored through the sensor under the indirect action through the pressure transmission device, the implementation difficulty is small, the feasibility is high, the pressure of the hole bottom can be monitored in real time according to the information monitored by the sensor, and the stability of the hole forming quality is ensured; in addition, the membrane is arranged close to the bottom of a drill hole, the pressure condition of the bottom of the drill hole can be accurately reflected, and an accurate pressure value is provided for a drilling operator.

Description

technical field [0001] The invention relates to the field of drilling construction equipment, in particular to a pressure sensing device for detecting hole bottom pressure. Background technique [0002] The rotary jet grouting construction is to use a drilling rig to drill holes, insert the grouting pipe with the nozzle to the predetermined position of the soil layer, and pass the pre-prepared mud through the high-pressure generating device to make the liquid flow obtain huge energy, and the mud flows from the grouting pipe The side nozzles are sprayed out at high speed, forming a liquid flow with highly concentrated energy, which directly destroys the soil. In the rotary jet grouting construction, the precise monitoring of the hole bottom pressure is an important factor affecting the quality of the hole. However, in the current conventional rotary jet grouting construction, the data of the hole bottom pressure are mostly determined according to the operator’s experience, su...

AI Technical Summary

Problems solved by technology

[0003] In view of the shortcomings of installing ordinary pressure sensors at the bottom of the hole in the above-mentioned existing rotary spraying construction, it is difficult to directly monitor the pressure at the bottom of the hole, and the feasibility is small, and the applicant provides a pressure sensing device with a reasonable structure. The device collects the pressure information at the bottom of the hole, which is difficult to realize and highly feasible

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