Device for monitoring stress and deformation of surrounding rock of roadway on line

Abstract

The utility model belongs to the technical field of mine roadway construction, and discloses a device for on-line monitoring of roadway surrounding rock stress and deformation, which comprises a machine body, a cylinder arranged in the machine body and connected with a protective cover through a connecting frame, and the machine body is provided with a through hole on one side and is provided with the protective cover through the through hole. A laser range finder is rotationally connected to the side, close to the interior of the machine body, of the protective cover, a motor is fixedly connected to the surface of the connecting frame, the laser range finder further comprises a connecting branch rod, the motor is connected with the connecting branch rod through a clutch assembly, and a cleaning assembly used for cleaning the surface of the laser range finder is installed at the end, close to the laser range finder, of the connecting branch rod. Through the clutch effect of the connecting branch rod and the connecting rod, after the laser range finder rotates by one circle for monitoring, the connecting branch rod and the connecting rod are relatively separated, the motor continues to drive the brush to conduct cleaning, and the problem that the laser range finder cannot be withdrawn or emission is blocked due to stone falling, dust falling and the like in a roadway is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine tunnel construction, in particular to a device for online monitoring of tunnel surrounding rock stress and deformation. Background Art

[0002] Underground coal mine tunnel support refers to a series of support measures taken during the coal mining process to ensure the stability and safety of the mine tunnels. Underground coal mine tunnels may be affected by factors such as geological structure, rock layer changes, and coal seam pressure during the mining process, resulting in deformation and damage to the tunnels. Therefore, it is very important to monitor the stress and deformation of the tunnel surrounding rock. Through deformation monitoring, the deformation of the tunnel can be discovered in time, possible dangerous situations can be predicted, and timely measures can be taken to ensure the safety of miners.

[0003] A laser monitor is a device used for monitoring deformation in tunnels. It calculates the distance between a target object and a rangefinder by emitting a laser pulse and measuring the time from emission to reception. It has the advantages of high precision, fast measurement speed, and non-contact measurement. Existing laser detectors usually only pop out the laser head when in use, scan a circle, and then put the laser head back into the instrument. However, dust and gravel are easily dropped into the instrument during scanning, blocking the return path of the laser head or clogging the laser emission port, causing the laser head to be unable to be retracted normally and the laser to be unable to be emitted normally. Utility Model Content

[0004] The utility model aims to provide a device for online monitoring of tunnel surrounding rock stress and deformation, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an online monitoring device for the stress and deformation of the surrounding rock of a tunnel, comprising a body, a through hole is opened on one side of the body, and a protective cover is installed through the through hole, and also comprises a cylinder arranged in the body, the cylinder is connected to the protective cover through a connecting frame, a laser rangefinder is rotatably connected to a side of the protective cover close to the inside of the body, and a motor is fixedly connected to the surface of the connecting frame;

[0006] It also includes a connecting rod, the motor is connected to the connecting rod through a clutch assembly, and a cleaning assembly for cleaning the surface of the laser rangefinder is installed at one end of the connecting rod close to the laser rangefinder.

[0007] Preferably, the clutch assembly includes a sleeve fixedly connected to the output end of the motor, a limiting shaft is slidingly connected inside the sleeve, the limiting shaft is fixedly connected to the connecting rod, a connecting rod is fixedly connected to one side of the laser rangefinder, and slots are provided on opposite sides of the connecting rod and the connecting rod.

[0008] Preferably, the cleaning assembly comprises a fixing plate fixedly connected to one end of the connecting rod close to the laser rangefinder, a brush is arranged on one side of the fixing plate, and a limit rail adapted to the fixing plate is fixedly connected to one side of the laser rangefinder, and when the fixing plate is stuck in the limit rail, the brush rotates together with the laser rangefinder;

[0009] The utility model also comprises a pushing component for disengaging the fixing plate from the limiting rail.

[0010] Preferably, the pushing assembly includes an electric push rod A fixedly connected to the surface of the fixed plate, a guide wheel is installed at the output end of the electric push rod A, an infrared sensor is provided on the side of the protective cover close to the inner side of the body, and a controller is also installed in the protective cover, and the controller is electrically connected to the electric push rod A and the infrared sensor respectively.

[0011] Preferably, an electric push rod B for positioning the limit rail is installed on one side of the protective cover close to the body, and the electric push rod B is electrically connected to the infrared sensor and the controller respectively.

[0012] Preferably, a heating wire is provided on the inner wall of the through hole.

[0013] Preferably, a display screen is provided on the surface of the body, and a bracket is installed on a side of the body away from the display screen.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model provides a cleaning component, and through the clutch action of the connecting rod and the connecting rod, the laser rangefinder is positioned after it rotates one circle for monitoring. At this time, the connecting rod and the connecting rod are relatively separated, and the motor continues to drive the brush to rotate one circle on the surface of the laser rangefinder for cleaning, thereby effectively avoiding the problem that the laser rangefinder cannot be retracted or the emission is blocked due to falling rocks and dust in the tunnel, and improving the accuracy of each monitoring of the laser rangefinder. In addition, by providing a heating wire, it is convenient to preheat the protective cover first in the tunnel with lower temperature, thereby avoiding the problem that the protective cover is frozen and cannot be ejected normally due to too low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a cross-sectional view of the utility model for showing the internal structure of the machine body;

[0018] Figure 3 For this utility model Figure 2 A in the enlarged view;

[0019] Figure 4 This is a schematic diagram of the utility model for showing the surface structure of the protective cover;

[0020] Figure 5 This is a schematic diagram for illustrating a clutch assembly of the present invention.

[0021] In the figure: 1. body; 11. display screen; 12. bracket; 2. protective cover; 21. laser rangefinder; 211. connecting rod; 212. limit rail; 22. connecting frame; 221. cylinder; 23. motor; 231. sleeve; 232. connecting rod; 233. limit shaft; 24. fixing plate; 241. brush; 242. electric push rod A; 243. guide wheel; 25. infrared sensor; 26. electric push rod B; 3. heating wire. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 5 As shown, an embodiment of the utility model provides an online monitoring device for stress and deformation of surrounding rock in a tunnel, comprising a body 1, a through hole being opened on one side of the body 1, and a protective cover 2 being installed through the through hole, and also comprising a cylinder 221 arranged in the body 1, the cylinder 221 being connected to the protective cover 2 through a connecting frame 22, the connecting frame 22 being "U"-shaped, and its two arm ends being fixedly connected to the protective cover 2, and the other end being fixedly connected to the output end of the cylinder 221, when the cylinder 221 outputs, it pushes the connecting frame 22 and pushes the protective cover 2 out of the through hole, a laser rangefinder 21 is rotatably connected to one side of the protective cover 2 close to the inside of the body 1, the laser rangefinder 21 can rotate on the axis of the protective cover 2, and a motor 23 is fixedly connected to the surface of the connecting frame 22.

[0024] It also includes a connecting rod 232 , the motor 23 is connected to the connecting rod 232 through a clutch assembly, and a cleaning assembly for cleaning the surface of the laser rangefinder 21 is installed at one end of the connecting rod 232 close to the laser rangefinder 21 .

[0025] like Figure 5 As shown, in this embodiment, the clutch assembly includes a sleeve 231 fixedly connected to the output end of the motor 23, a limit shaft 233 is limitedly slidably connected inside the sleeve 231, the limit shaft 233 is fixedly connected to the connecting rod 232, and a connecting rod 211 is fixedly connected to one side of the laser rangefinder 21. The connecting rod 211 is located at the axial position of the protective cover 2 and can rotate with the laser rangefinder 21. The connecting rod 211 and the connecting rod 232 are both provided with card slots on the opposite sides.

[0026] Specifically, since the connecting rod 232 is limited and slid on the sleeve 231 by the limiting shaft 233, the connecting rod 232 can move forward and backward, and then contact and connect with the connecting rod 211. When the connecting rod 232 contacts the connecting rod 211, the contact surface grooves of the two are clamped with each other, and then under the drive of the motor 23, the connecting rod 232 and the connecting rod 211 will be driven to rotate together. After the connecting rod 232 is separated from the connecting rod 211, the motor 23 only drives the connecting rod 232 to rotate.

[0027] Further, such as Figure 4 As shown, in this embodiment, the cleaning assembly includes a fixed plate 24 fixedly connected to one end of the connecting rod 232 close to the laser rangefinder 21, a brush 241 is provided on one side of the fixed plate 24, the brush 241 abuts against the surface of the laser rangefinder 21, and a limiting rail 212 adapted to the fixed plate 24 is fixedly connected to one side of the laser rangefinder 21. When the fixed plate 24 is stuck in the limiting rail 212, the brush 241 rotates together with the laser rangefinder 21, and also includes a pushing assembly for disengaging the fixed plate 24 from the limiting rail 212.

[0028] Specifically, the fixed plate 24 can be stuck in the limit rail 212. At this time, the rotation of the laser rangefinder 21 will cause the limit rail 212 to rotate, and then drive the fixed plate 24 to rotate together. At this time, the brush 241 and the laser rangefinder 21 do not move relatively, so the brush 241 will not hinder the rotating laser rangefinder 21 from performing lane distance measurement. After the laser rangefinder 21 completes the distance measurement, the fixed plate 24 can be separated from the limit rail 212 by pushing the component. At this time, the fixed plate 24 and the laser rangefinder 21 can move independently of each other, which is convenient for subsequent cleaning of the brush 241.

[0029] Further, such as Figure 3 As shown, in this embodiment, the pushing component includes an electric push rod A242 fixedly connected to the surface of the fixed plate 24, a guide wheel 243 is installed at the output end of the electric push rod A242, an infrared sensor 25 is arranged on the side of the protective cover 2 close to the body 1, and a controller is also installed in the protective cover 2, the controller is electrically connected to the electric push rod A242 and the infrared sensor 25 respectively, after the laser rangefinder 21 rotates one circle to complete the distance measurement, it drives the limit rail 212 and the fixed plate 24 to rotate to the position of the infrared sensor 25, the infrared sensor 25 senses the brush 241 passing, and therefore sends a signal to the controller, the controller immediately controls the output of the electric push rod A242, so that the guide wheel 243 contacts the protective cover 2, and lifts the fixed plate 24, so that the fixed plate 24 is separated from the limit rail 212, so that the brush 241 can move independently.

[0030] It is worth noting that, in the process of the electric push rod A242 outputting and pushing the guide wheel 243 to lift the fixed plate 24, the movement of the fixed plate 24 will synchronously push the connecting rod 232 and push the connecting rod 232 to be disengaged from the connecting rod 211. At this time, the motor 23 that continues to output can only drive the connecting rod 232 to rotate, and no longer continues to drive the laser rangefinder 21 to rotate, so that the brush 241 can follow the rotation of the fixed plate 24 to clean the surface of the laser rangefinder 21. In addition, since the guide wheel 243 abuts against the protective cover 2, it is also convenient for the fixed plate 24 to rotate.

[0031] Furthermore, in the present embodiment, an electric push rod B26 for positioning the limit rail 212 is installed on one side of the protective cover 2 close to the body 1. The electric push rod B26 is electrically connected to the infrared sensor 25 and the controller respectively. When the infrared sensor 25 senses the brush 241 passing by, it sends a signal to the controller in time. At this time, the controller not only controls the electric push rod A242 to output, but also controls the electric push rod B26 to output. The size of the electric push rod B26 is adapted to the limit rail 212. When the electric push rod B26 pops outward, it can be stuck in the limit rail 212, thereby positioning the limit rail 212 and the laser rangefinder 21 so that they can no longer rotate. After the fixed plate 24 drives the brush 241 to rotate and clean for a circle, when it is sensed by the infrared sensor 25 again, the controller controls the electric push rod A242 and the electric push rod B26 to retract, thereby continuing to stick the fixed plate 24 into the limit rail 212.

[0032] like Figure 4 As shown, in this embodiment, a heating wire 3 is provided on the inner wall of the through hole. The provision of the heating wire 3 facilitates preheating in advance to prevent the protective cover 2 from freezing and failing to pop out normally in a relatively cold tunnel.

[0033] A display screen 11 is provided on the surface of the machine body 1 for displaying monitoring values. A bracket 12 is installed on the side of the machine body 1 away from the display screen 11 , and the machine body 1 is installed on the wall of the tunnel through the bracket 12 .

[0034] Working principle:

[0035] When it is necessary to monitor the deformation of the tunnel, the cylinder 221 pushes the connecting frame 22 to push the protective cover 2 out of the through hole, and the laser rangefinder 21 leaks out. Then the motor 23 drives the sleeve 231 to rotate. At this time, the connecting rod 232 and the connecting rod 211 are in a connected state, so the motor 23 will drive the connecting rod 232 and the connecting rod 211 to rotate together, and then drive the laser rangefinder 21 to rotate, and monitor each predetermined point in the tunnel one by one. After the laser rangefinder 21 completes the rotation monitoring, that is, after one rotation, the infrared sensor 25 senses the brush 241 passing by for the first time, and then transmits the signal to the controller. The controller controls the electric push rod A242 and the electric push rod B26 to output at the same time, and the electric push rod A242 pushes the guide wheel 243 to abut against the protective cover 2 and lift it up. The fixed plate 24 is disengaged from the limit rail 212. At the same time, the output of the electric push rod B26 will be stuck on the limit rail 212 to position the limit rail 212. At this time, since the fixed plate 24 is pushed, the connecting rod 232 will be pushed synchronously to disengage it from the connecting rod 211. Due to the continuous rotation of the motor 23, the sleeve 231 only drives the connecting rod 232 to rotate, thereby causing the brush 241 on the surface of the fixed plate 24 to rotate and clean the laser rangefinder 21. After one week of cleaning, the infrared sensor 25 senses the brush 241 passing by for the second time. At this time, the controller controls the electric push rod A242 and the electric push rod B26 to retract, so that the fixed plate 24 is re-stuck in the limit rail 212. Then the cylinder 221 contracts to retract the protective cover 2 into the through hole to complete the entire monitoring process.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for online monitoring of tunnel surrounding rock stress and deformation, comprising a body (1), a through hole being opened on one side of the body (1), and a protective cover (2) being installed through the through hole, characterized in that: It also comprises a cylinder (221) disposed in the machine body (1), the cylinder (221) being connected to the protective cover (2) via a connecting frame (22), a laser rangefinder (21) being rotatably connected to a side of the protective cover (2) close to the inside of the machine body (1), and a motor (23) being fixedly connected to a surface of the connecting frame (22); It also comprises a connecting rod (232), the motor (23) being connected to the connecting rod (232) via a clutch assembly, and a cleaning assembly for cleaning the surface of the laser rangefinder (21) being installed at one end of the connecting rod (232) close to the laser rangefinder (21).

2. The device for online monitoring of tunnel surrounding rock stress and deformation according to claim 1, characterized in that: The clutch assembly comprises a sleeve (231) fixedly connected to the output end of the motor (23), a limit shaft (233) being limit-slidably connected inside the sleeve (231), the limit shaft (233) being fixedly connected to a connecting rod (232), a connecting rod (211) being fixedly connected to one side of the laser rangefinder (21), and a clamping groove is provided on opposite sides of the connecting rod (211) and the connecting rod (232).

3. The device for online monitoring of tunnel surrounding rock stress and deformation according to claim 1, characterized in that: The cleaning assembly comprises a fixing plate (24) fixedly connected to one end of the connecting rod (232) close to the laser rangefinder (21); a brush (241) is arranged on one side of the fixing plate (24); a limiting rail (212) adapted to the fixing plate (24) is fixedly connected to one side of the laser rangefinder (21); when the fixing plate (24) is stuck in the limiting rail (212), the brush (241) rotates together with the laser rangefinder (21); It also includes a pushing assembly for disengaging the fixing plate (24) from the limiting rail (212).

4. The device for online monitoring of tunnel surrounding rock stress and deformation according to claim 3, characterized in that: The pushing assembly comprises an electric push rod A (242) fixedly connected to the surface of a fixed plate (24), a guide wheel (243) being installed at the output end of the electric push rod A (242), an infrared sensor (25) being arranged on the side of the protective cover (2) close to the inside of the machine body (1), and a controller being installed in the protective cover (2), and the controller being electrically connected to the electric push rod A (242) and the infrared sensor (25) respectively.

5. The device for online monitoring of tunnel surrounding rock stress and deformation according to claim 4, characterized in that: An electric push rod B (26) for positioning the limit rail (212) is also installed on one side of the protective cover (2) close to the body (1), and the electric push rod B (26) is electrically connected to the infrared sensor (25) and the controller respectively.

6. The device for online monitoring of tunnel surrounding rock stress and deformation according to claim 1, characterized in that: A heating wire (3) is arranged on the inner wall of the through hole.

7. The device for online monitoring of tunnel surrounding rock stress and deformation according to claim 1, characterized in that: A display screen (11) is provided on the surface of the machine body (1), and a bracket (12) is installed on a side of the machine body (1) away from the display screen (11).

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