Surrounding rock separation layer displacement monitor

Abstract

The invention relates to a surrounding rock separation layer displacement monitor. The surrounding rock separation layer displacement monitor comprises mechanical parts and electrical parts. The mechanical parts comprise an anchor rod assembly, a first transmission mechanism, a second transmission mechanism, a first shell, and two separation layer displacement transferring assemblies which are basically arranged in the anchor rod assembly. The anchor rod assembly is fixed on the first shell; the first transmission mechanism and the second transmission mechanism are both arranged in the first shell basically; and power output pieces of the two separation layer displacement transferring assemblies are in dynamic connection with power input pieces of the first transmission mechanism and the second transmission mechanism respectively. The electrical parts comprise a second shell, a circuit board fixed in the second shell, a first angular transducer and a second angular transducer and the like. The edge of a left side plate of the first shell is provided with 3 to 6 pin hook assemblies, and pin holes are formed at the corresponding positions of a right side plate of the second shell. The first shell is inserted into and hooks the pin holes of the second shell through the pin hook assemblies and is connected with the pin holes. The power output pieces of the first and second transmission mechanisms are connected with the first and second angular transducers respectively.

Description

technical field [0001] The invention relates to a monitoring and alarming instrument for surrounding rock separation layer displacement in underground coal mines. Background technique [0002] Surrounding rock refers to the rock mass around the excavation space, specifically refers to the rock mass that affects the stability of the tunnel body within a certain range around the tunnel; while the separation layer refers to the separation of adjacent rock layers above the excavation space along the bedding plane. Simply put, it is the mutual separation between the direct top and the old top. [0003] At present, the surrounding rock layer monitoring equipment in the mine mainly adopts the surrounding rock separation layer monitoring and alarm instrument. The tube is connected with a mechanical housing and an electrical housing. Two left and right gears are installed in the mechanical housing, two gear racks meshing with it and a return spring, and then two thin steel cables wi...

AI Technical Summary

Problems solved by technology

The disadvantages of this kind of alarm are: (1) The two racks are exposed outside the shell during installation, which are easy to be damaged by collision and lose the alarm function, so it is more suitable for installation on the top of surrounding rocks and not suitable for installation on surrounding rocks. On both sides of the rock, but even when installed on the top of the surrounding rock, it is often touched by the staff or maintenance personnel with tools, causing damage

(2) Due to structural limitations, the length of the rack is limited. When the deformation and movement of the surrounding rock is large, the rack will break away from the gear and shrink into the drill hole to lose its effect

The disadvantages of this sensor are: 1. The steel wire rope wound on the transmission mechanism has the risk of slipping out of the thread during transportation and installation

2. There is no pre-tightening and reset device on the transmission mechanism, so it is difficult to ensure whether the wire rope on the transmission shaft is wound in place

3. When the surrounding rock is separated from the layer, the wire rope moves along the radial and axial directions of the transmission mechanism, and the movement direction of the wire rope cannot be tangent to the transmission mechanism, which affects the calculation of displacement accuracy

4. Electrical appliances and mechanical devices are in the same shell, and electrical devices cannot be reused

But the mechanical connection structure of the above-mentioned monitoring and alarming instrument is not described, and the connection mode with each part in the mechanical housing is not clear, and the above-mentioned monitoring and alarming instrument also has the following deficiencies: 1, only adopt between the mechanical housing and the electrical housing The magnetic steel connection is not tight, and the electrical housing is easy to fall off from the mechanical housing

2. There is no pre-tightening and reset device on the transmission mechanism, so it is difficult to ensure whether the wire rope on the transmission shaft is wound in place

3. The scale tape is exposed outside the mechanical casing, which is easy to be damaged by collision, and when the scale tape collides and is pulled down, the scale tape will drive the transmission shaft to rotate and cause false alarms

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