Surrounding rock internal displacement monitoring device based on negative pressure type measurement

Abstract

The utility model discloses a surrounding rock internal displacement monitoring device based on negative pressure type measurement, which comprises a steel wire rope shell and a measuring cylinder which are vertically arranged, the steel wire rope shell is communicated with the inside of the measuring cylinder, a piston and a round indicating sheet are arranged in the measuring cylinder, the piston is connected with one end of a steel wire rope, and the round indicating sheet is connected with the other end of the steel wire rope. The other end of the steel wire rope extends out of the end of the steel wire rope shell and is connected with a base point fixer; according to the surrounding rock internal displacement monitoring device provided by the utility model, the non-rotating steel wire rope is adopted to replace a common measuring steel wire, so that the phenomenon that the steel wire rope is curled and buckled under the condition of a multi-base-point fixer can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of rock stratum movement monitoring devices, and in particular relates to a surrounding rock internal displacement monitoring device based on negative pressure measurement. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] The roof delamination meter is a special monitoring instrument for monitoring the movement of roof rock. It can monitor the change trend of the delamination value within and outside the anchoring range of the roof. As the tunnel excavation destroys the static balance of the tunnel surrounding rock, it leads to the redistribution of the surrounding rock stress. When the surrounding rock stress at a certain point reaches or exceeds the ultimate strength of the surrounding rock, the surrounding rock will be unstable and damaged. In order to grasp the changes in the tunnel surrounding rock in a timely manner, it is necessary to use instruments to monitor the stability of the tunnel surrounding rock to ensure the safety of personnel and the smooth progress of the project. At present, the roof delamination meter is the most practical method to monitor the stability of the roof.

[0004] However, during the storage, installation and use of traditional roof separation meters, the steel wires connecting the fixing claws in the anchor are prone to entanglement and mutual interference, and the springs in the measuring tube are easily damaged, resulting in the instrument being unable to be used normally or the measurement data being inaccurate. In addition, after the base point of the existing roof separation meter is fixed, there is a problem of the base point falling off when the steel wire is manually pulled. At the same time, dust and particles in the working environment are easy to enter the measuring tube, affecting the normal use and life of the instrument. Utility Model Content

[0005] The utility model aims to provide a surrounding rock internal displacement monitoring device based on negative pressure measurement, which can avoid the occurrence of wire rope winding and base point falling off, and improve the accuracy of measurement data.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] In the first aspect, an embodiment of the utility model provides a surrounding rock internal displacement monitoring device based on negative pressure measurement, including a vertically arranged wire rope housing and a measuring cylinder, the wire rope housing and the measuring cylinder are internally connected, a piston and a circular indicator plate are arranged in the measuring cylinder, the piston is connected to one end of the wire rope, and the other end of the wire rope extends from the end of the wire rope housing to connect to a base point fixer.

[0008] As a further technical solution, the end of the measuring tube is provided with an opening, and a conical opening protective cover is installed, and the opening on the conical opening protective cover is blocked by a truncated cone-shaped plug.

[0009] As a further technical solution, a limiter is provided at the end of the measuring cylinder, the limiter serves as the initial position of the measuring cylinder, and the circular indicator piece is close to the limiter.

[0010] As a further technical solution, the base point fixer includes a fixing shell and an anchor claw, and the tail of the fixer shell is connected to the wire rope.

[0011] As a further technical solution, the fixed shell adopts a conical shape, and the anchor claw is installed in the fixed shell in the form of a barb.

[0012] As a further technical solution, a plurality of measuring cylinders are provided, and the number of measuring cylinders is the same as the number of steel wire ropes and base point fixers.

[0013] As a further technical solution, a rotating knob is provided at the corner where the wire rope housing and the measuring cylinder are connected, and the wire rope is wound around the rotating knob and then connected to the piston.

[0014] As a further technical solution, the rotating knob is fixed on the through pipe.

[0015] As a further technical solution, the steel wire rope is a multi-layer strand steel rope, which is twisted from multiple steel wires with the same diameter and is divided into two layers, inner and outer layers, with different twist directions.

[0016] As a further technical solution, the measuring tube is a transparent measuring tube with a scale.

[0017] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0018] The surrounding rock internal displacement monitoring device provided by the utility model can effectively avoid the phenomenon of the wire rope being tangled and knotted in the case of a multi-base point fixture by using a non-rotating wire rope instead of an ordinary measuring wire rope. Moreover, the force is evenly distributed, the operation is stable, and the wire rope is not easy to break during use. Even if the wire rope breaks, it will not curl up, so as not to scratch other wire ropes and affect the normal operation of other wire ropes.

[0019] The surrounding rock internal displacement monitoring device provided by the utility model can effectively prevent the possibility of the base point falling off due to manual pulling of the wire rope after the base point is fixed by arranging a rotating knob in the measuring tube, thereby improving the reliability of the instrument and ensuring the smooth progress of the work.

[0020] The surrounding rock internal displacement monitoring device provided by the utility model adopts the negative pressure principle to monitor the displacement, which can effectively prevent dust and particles in the working environment from entering the measuring tube and affecting the normal use and life of the instrument.

[0021] The surrounding rock internal displacement monitoring device provided by the utility model can effectively prevent the base point fixture from slipping in the hole by arranging a conical fixed shell and a plurality of base point fixtures, and realizes simultaneous measurement of a plurality of base points, thereby ensuring the accuracy of the measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 It is a structural schematic diagram of the surrounding rock internal displacement monitoring device based on negative pressure measurement of the utility model;

[0024] Figure 2 It is a schematic diagram of the limiter of the utility model installed on the measuring cylinder;

[0025] Figure 3 It is a structural schematic diagram of the rotary knob of the utility model;

[0026] Figure 4 It is a side view of the rotary knob of the utility model installed on the through pipe;

[0027] Figure 5 It is a front view of the rotary knob of the utility model installed on the through pipe.

[0028] The schematic diagram is for illustrative purposes only;

[0029] Among them, 1. base point fixer; 2. wire rope; 3. rotating knob; 301. nut; 302. metal column; 303. arc baffle; 4. piston; 5. circular indicator plate; 6. limiter; 7. conical opening protective cover; 8. measuring cylinder; 9. truncated cone plug; 10. wire rope housing; 11. through pipe. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0031] Example 1

[0032] In a typical implementation of the present invention, Figure 1As shown, a surrounding rock internal displacement monitoring device based on negative pressure measurement is provided, including a vertically arranged wire rope housing 10 and a measuring cylinder 8, the wire rope housing 10 and the measuring cylinder 8 are internally connected, a piston 4 and a circular indicator plate 5 are arranged in the measuring cylinder 8, the piston 4 is connected to one end of the wire rope 2, and the other end of the wire rope 2 extends from the end of the wire rope housing 10 to connect to the base point fixer 1.

[0033] Specifically, the end of the measuring tube 8 is open and a conical opening cover 7 is installed. The opening on the conical opening cover 7 is blocked by a truncated cone plug 9. When in use, the plug must be pulled out to form a pressure difference on the left and right sides of the circular indicator sheet 5. At the same time, it can effectively prevent dust and particles in the working environment from entering the measuring tube, avoiding affecting the normal use and life of the instrument. A limiter 6 is set at the end of the measuring tube 8, such as Figure 2 As shown, the stopper 6 is an arc-shaped baffle fixed on the inner wall of the measuring cylinder 8. The stopper 6 serves as the initial position of the measuring cylinder 8. The circular indicator piece 5 is close to the stopper 6. The position of the circular indicator piece 5 is limited by the set stopper 6 to prevent the circular indicator piece 5 from coming out of the measuring cylinder 8. Furthermore, the circular indicator piece is made of PTFE (polytetrafluoroethylene) material with a small friction coefficient. The circular indicator piece is set with a certain width to ensure that it does not tilt. When in use, the plug located at the tapered opening protective cover is pulled out, the steel wire rope pulls the piston to move to the right, the pressure between the piston and the circular indicator piece is reduced, and the circular indicator piece begins to move under the pressure on the left side.

[0034] In this embodiment, the base point fixer 1 includes a fixed shell and an anchor claw. The tail of the fixer shell is connected to the wire rope 2. The fixed shell is conical, and the anchor claw is installed in the fixed shell in the form of a barb. By setting the shape of the fixed shell and the anchor claw, the base point fixer can be effectively prevented from slipping in the hole, thereby ensuring the accuracy of the measurement data.

[0035] In this embodiment, the measuring cylinders 8 are provided in plurality, and the number of measuring cylinders is the same as the number of wire ropes and base point fixers. In a specific implementation manner, six measuring cylinders are provided, and the six measuring cylinders are divided into three groups. The three groups of measuring cylinders are arranged in parallel, and each group includes two measuring cylinders. The two measuring cylinders are symmetrically arranged on the same axis with respect to the axis of the wire rope housing. The above arrangement can realize simultaneous measurement of multiple base points, thereby improving measurement efficiency.

[0036] Furthermore, a rotating knob 3 is provided at the corner where the wire rope housing 10 and the measuring cylinder 8 are connected, the wire rope 2 is wound around the rotating knob 3 and then connected to the center position of the piston 4, and the rotating knob 3 is fixed on the through pipe 11 connecting the wire rope housing 10 and the measuring cylinder 8. The rotating knob 3 can effectively prevent the possibility of the base point falling off due to manual pulling of the wire rope after the base point is fixed, thereby improving the reliability of the instrument and ensuring the smooth progress of the work.

[0037] Specifically, Figure 3 As shown, the rotating knob 3 is composed of a nut 301, a metal column 302 embedded in the nut, and an arc stopper 303 at the end. Rotating the nut will drive the entire knob to rotate. The rotating knob 3 is installed on the through pipe 11, the nut 301 is located outside the through pipe 11, and the metal column 302 is located inside the through pipe. Figure 4 and Figure 5 As shown, the front and rear are tightly fitted to the inner wall surface of the through pipe 11, and the wire rope between the piston and the rotating knob is in a taut state. When the top plate is delaminated, the wire rope connected to the base point fixer will be subjected to tension, and the wire rope wrapped around the knob will drive the knob to rotate. Since the wire rope is in a taut state, the wire rope connected to the piston will drive the piston to move.

[0038] In this embodiment, the steel wire rope 2 is a multi-layer steel wire rope (non-rotating steel wire rope), which is twisted from multiple steel wires of the same diameter, divided into two layers, inner and outer, with different twist directions. The non-rotating steel wire rope replaces the ordinary measuring steel wire, which can effectively avoid the phenomenon of steel wire rope winding and knotting in the case of multi-base point fixtures. And it is evenly stressed, runs smoothly, and is not easy to break during use. Even if the wire breaks, it will not curl up, so as not to scratch other steel wire ropes and affect the normal operation of other steel wires.

[0039] In this embodiment, the measuring tube 8 is a transparent measuring tube with scales to facilitate reading.

[0040] The working principle of the surrounding rock internal displacement monitoring device based on negative pressure measurement provided in this embodiment is as follows:

[0041] When in use, first pull out the truncated cone-shaped plug 9 located on the conical opening cover 7, and then fix the deep and shallow base point fixtures 1 in the borehole formed by the anchor drilling machine. During this period, turn the rotary knob 3 to ensure that the base point fixture 1 is stable in the borehole and will not fall off. At the same time, the wire rope 2 in the measuring cylinder 8 will pull the piston 4 to move. At this time, the circular indicator piece 5 starts to move slowly from the initial position of the limiter 6 under the action of the left and right pressure difference until the device is installed. Record the reading of the front end of the circular indicator piece 5 at the measuring cylinder 8 as the initial reading. When the top plate delaminates, the piston 4 continues to move, and accordingly, the circular indicator piece 5 will also move under the action of the pressure difference until the reading remains stable. Record the reading of the front end of the circular indicator piece 5 at the measuring cylinder 8 at this time, and record it as the end reading. At this point, the displacement of the top plate can be monitored based on the recorded reading data.

[0042] In this embodiment, the measuring cylinder and the through pipe are connected by threads. After use, the measuring cylinder can be rotated and separated. At this time, the circular indicator piece is located in the measuring cylinder, and the piston is separated from the measuring cylinder. When used next time, the piston is dragged to a certain length and installed in the measuring cylinder. The piston and the circular indicator piece are placed in the initial position using a tool. During this period, the steel wire rope connected to the base point fixture must be pulled to ensure that the steel wire rope in the measuring cylinder is in a taut state.

[0043] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A surrounding rock internal displacement monitoring device based on negative pressure measurement, characterized in that: It includes a vertically arranged wire rope housing and a measuring cylinder, the wire rope housing and the measuring cylinder are internally connected, a piston and a circular indicator piece are arranged in the measuring cylinder, the piston is connected to one end of the wire rope, and the other end of the wire rope extends from the end of the wire rope housing to connect to the base point fixer.

2. The surrounding rock internal displacement monitoring device based on negative pressure measurement according to claim 1, characterized in that: The end of the measuring cylinder is opened and a conical opening protective cover is installed, and the opening on the conical opening protective cover is blocked by a truncated cone plug.

3. The surrounding rock internal displacement monitoring device based on negative pressure measurement according to claim 2, characterized in that: A limiter is arranged at the end of the measuring cylinder, the limiter serves as the initial position of the measuring cylinder, and the circular indicating piece is close to the limiter.

4. The surrounding rock internal displacement monitoring device based on negative pressure measurement according to claim 1, characterized in that: The base point fixer comprises a fixed shell and an anchor claw, and the tail of the fixed shell is connected with a steel wire rope.

5. The surrounding rock internal displacement monitoring device based on negative pressure measurement according to claim 4, characterized in that: The fixed shell adopts a cone shape, and the anchor claw is installed in the fixed shell in the form of a barb.

6. The surrounding rock internal displacement monitoring device based on negative pressure measurement according to claim 1, characterized in that: There are multiple measuring cylinders, and the number of measuring cylinders is the same as the number of steel wire ropes and base point fixers.

7. The surrounding rock internal displacement monitoring device based on negative pressure measurement according to claim 1, characterized in that: A rotating knob is provided at the corner where the wire rope housing and the measuring cylinder are connected, and the wire rope is wound around the rotating knob and then connected to the piston.

8. The surrounding rock internal displacement monitoring device based on negative pressure measurement according to claim 7, characterized in that: The rotating knob is fixed on the through pipe.

9. The surrounding rock internal displacement monitoring device based on negative pressure measurement according to claim 1, characterized in that: The steel wire rope is a multi-layer strand steel rope, which is twisted from multiple steel wires with the same diameter and is divided into two layers, an inner layer and an outer layer, with different twist directions.

10. The surrounding rock internal displacement monitoring device based on negative pressure measurement according to claim 1, characterized in that: The measuring cylinder is a transparent measuring cylinder with scales.

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