Opening and contracting device and drilling probe

Abstract

The embodiment of the invention provides an opening and contracting device and a drilling probe. The opening and contracting device comprises an accommodating pipe for accommodating the drilling probeand an opening and contracting pipe connected with the accommodating pipe; the opening and contracting pipe comprises at least two metal sheets, all the metal sheets at one end of the opening and contracting pipe are connected with the accommodating pipe, all the metal sheets at the other end of the opening and contracting pipe are connected through an opening and contracting device body, the opening and contracting device body is connected with all the metal sheets through telescopic supports separately, so that all the metal sheets are uniformly distributed on the circle with the opening and contracting device body as the circle center, and the metal sheets at one end of the opening and contracting pipe are opened or contracted by controlling all the telescopic supports to stretch out and draw back. By arranging the accommodating pipe for accommodating the drilling probe and controlling the opening and contracting device body to be opened and contracted, sand and crushed stones above the drilling probe are in the movable state or are decomposed or drop to the bottom of a hole, the drilling probe can successfully escape when a hole jam accident occurs in a drill hole, and the probability of hole jam damage to the probe is effectively reduced.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of engineering detection, and more specifically, to an expansion and contraction device and a drilling probe. Background technique [0002] Rock mass properties and mechanical properties are the important basis for designing all large-scale rock mass projects. Drilling elastic modulus and in-hole TV are two main detection methods for testing rock mass properties and mechanical parameters. Borehole elastic modulus and in-hole television are common geophysical detection methods for determining the elastic modulus and properties of rock mass, and are widely used in the field of engineering detection. [0003] Drilling elastic modulus is an in-situ test method with little disturbance to the rock mass, which measures the depth of the rock mass and below the groundwater level in sections, and determines the deformation characteristics and elastic parameters of the deep rock mass. The basic p...

AI Technical Summary

Problems solved by technology

When the borehole probe is tested, the size of the borehole probe is very close to the diameter of the borehole, which also causes small debris to fall in the rock breaking part, which may cause the borehole probe to get stuck, thereby damaging the test probe and affecting Detection efficiency

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