Mining self-pressurization intelligent wireless anchor cable dynamometer and using method thereof

Abstract

The invention discloses a mining self-pressurization intelligent wireless anchor cable dynamometer and a use method thereof, and aims to solve the problems existing in the use of an existing anchor cable dynamometer. The wireless anchor cable dynamometer comprises an oil cylinder outer body, a telescopic body, a first sealing ring, a three-way joint, a gauge outfit, an intelligent tray and a high-pressure oil pipe. The pressure release valve is arranged on the oil cylinder outer body, and the pressure release function can be achieved under the action of blasting impact; the manual pump pressurizes the interior of the oil storage cavity of the oil cylinder outer body through the three-way joint, and when the designed pre-tightening force is reached, the oil tightening valve can be rotated to seal oil into the oil storage cavity; a plurality of modules are arranged in the meter head, so that data acquisition, conversion and recording can be realized, and wireless transmission can be realized. The wireless anchor cable dynamometer is suitable for long-term monitoring and early warning of the axial force of the anchor cable in the coal mine tunnel, has the advantages of impact resistance, the stable test result, convenient data recording and transmission and convenient pressurization, and can analyze the stress conditions of the tray in different directions so as to better guide supporting construction and evaluate and check the supporting effect.

Description

technical field [0001] The invention relates to the field of coal mines, in particular to a mining self-pressurizing intelligent wireless anchor cable dynamometer. Background technique [0002] Coal mines are areas where humans exploit coal resources in coal-rich mining areas to provide fuel for people's work and life. Coal mines need to be mined, and support is required during mining. Passive support was used in the past, but the prestressed anchor cable support technology has changed the original passive support into active support, changing the stress state and stress of the surrounding rock. Distributed and reliable support, it is widely used in various roadway support projects in coal mines. The support effect of the prestressed anchor cable is directly related to the application of the pre-tightening force. The small pre-tightening force cannot provide sufficient active support bearing capacity, resulting in excessive deformation of the surrounding rock; if the pre-ti...

AI Technical Summary

Problems solved by technology

[0003] The commonly used anchor cable dynamometer is placed between the pallet and the rigging, and the anchor cable presser is used to tension, passively load and record the pressurized value, and it is displayed as oil pressure, and the axial force of the anchor cable needs to be obtained through conversion. Very inconvenient, the value of the pressurizer and the value of the anchor cable pressure are often out of sync

At present, most anchor cable dynamometers use pointers or displays, and manual recording of pressure gauge values ​​is required. Some use online transmission, which requires laying cables in the roadway, which is very inconvenient. The current anchor cable dynamometers do not have impact resistance. The dynamometer is prone to failure during blasting vibration and pressure, which is extremely inconvenient to use

[0004] The invention with the application number of 2017104424726 provides an assembled anchor cable dynamometer and its use method. Its main feature is that there are 3 sets of measurement systems distributed in the elastic body at 120° in the radial direction, and each set of measurement systems contains 2 steel wires. String, induction electromagnetic coil, excitation electromagnetic coil and electromagnetic converter device; the induced current in the induction electromagnetic coil strengthens the magnetic field strength of the excitation coil, maintains the continuous vibration of the steel string, and converts the mechanical frequency of the steel string into Electric signal frequency output; this invention uses three sets of measurement systems to improve the test accuracy, but it cannot record and monitor which side of the pallet is under greater force, and requires current to maintain the continuous vibration of the steel string. During the process, it is easy to be disturbed by electromagnetic interference, and the test result is not accurate. This invention has no function of resisting impact, and the conditions of use are limited.

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