A variable angle fixing device for a lane convergence laser rangefinder and a method of using the device

Abstract

The present invention discloses a variable angle fixing device for a tunnel convergence laser rangefinder and a method for using the same. The device includes a fixed shaft, a rotating rod, a fixed box and an external button device; the laser rangefinder is arranged in the fixed box and fixed by a spring sheet and a baffle in the fixed box; the fixed box is connected to the rotating rod, the rotating rod is hinged to the fixed rod, the fixed shaft is fixed to the anchor rod of the tunnel side, the fixed box can be rotated up and down by the rotating rod, and the external button device is pressed to achieve the measurement of targets at different angles in the tunnel by the measuring device. The variable angle fixing device for the laser rangefinder of the present invention is portable, easy to operate, and easy to install and disassemble. The fixing device of the present invention is used to monitor the deformation of the tunnel surface in real time, which changes the problems existing in the traditional measurement mode, such as single measurement angle, difficult to fix measurement points, large measurement errors, etc.

Description

Technical Field

[0001] The invention relates to a variable angle fixing device of a tunnel convergence laser rangefinder and a use method thereof, and belongs to the field of tunnel surface deformation measurement. Background Art

[0002] After the tunnel is excavated, the stress state of the surrounding rock will change, causing deformation of the surrounding rock. Especially under deep conditions, the ground stress is very large, and the deformation of the tunnel surrounding rock is very complicated. The tunnel plays a very important role in coal mining, ventilation and transportation, so the monitoring of tunnel surrounding rock deformation and stability evaluation are of great significance.

[0003] At present, the monitoring methods used to monitor the displacement of the tunnel surface are mostly the steel tape monitoring method, the measuring rod monitoring method, the convergence meter monitoring method, etc. The above monitoring methods are complicated to operate and have large measurement errors. They cannot achieve the effect of continuously monitoring and recording the displacement of the tunnel surface. The operation is cumbersome and inefficient. At present, the commonly used equipment for measuring the deformation of the tunnel surface is the laser rangefinder. However, due to the lack of a stable and reliable fixing method during measurement, it can only be manually held. It cannot be guaranteed that the laser rangefinder can be aligned with the preset measuring point every time, and it is difficult to ensure that each measurement is at the same position, which is affected by human factors and leads to large measurement errors. Moreover, when the tunnel section is large, operating the laser rangefinder requires climbing, which is inconvenient and unsafe. Summary of the invention

[0004] The invention aims to provide a variable angle fixing device for a tunnel convergence laser rangefinder, which solves the problems of the laser rangefinder being difficult to fix, having large errors, having a single measuring angle and being complicated to operate during the tunnel ranging process.

[0005] In the present invention, the variable angle fixing device of the tunnel convergence laser rangefinder comprises a fixed shaft, a rotating rod, a fixed box and an external button device; the laser rangefinder is arranged in the fixed box and fixed by a spring sheet and a baffle in the fixed box; the fixed box is connected to the rotating rod, the rotating rod is hinged to the fixed rod, the fixed shaft is fixed on the anchor rod of the tunnel wall, the fixed box can be rotated up and down by the rotating rod, and the external button device is pressed to realize the measurement device to measure targets at different angles in the tunnel.

[0006] The present invention provides a variable angle fixing device for a tunnel convergence laser rangefinder, comprising a fixed shaft, a rotating rod, and a fixed box; the fixed shaft is fixed to an original anchor rod on the tunnel wall, the upper and lower ends of the fixed shaft are respectively hinged to the rotating rod through bearings, and the fixed box is located between the upper and lower rotating rods;

[0007] The fixing box includes a baffle, a spring sheet and an external pressing device; the fixing box is a rectangular parallelepiped structure, the upper end face is a transparent acrylic plate, and the lower end face, left and right end faces and rear end face are stainless steel plates; the laser rangefinder is arranged inside the fixing box and fixed by the spring sheet and baffle in the fixing box; the spring sheet is fixed on the left and right sides of the fixing box and is in an arc shape, which is used to fix the left and right position of the laser rangefinder; the baffle is at the rear end of the fixing box and is in a rectangular shape, the other end of the baffle is in contact with the screw, and there is a set of adjustment nuts on the rear side of the fixing box, which is used to adjust the front and rear position of the baffle, thereby fixing the front and rear position of the laser rangefinder;

[0008] The fixed box is welded to the rotating rod as a whole, and the fixed box can be rotated up and down by the rotating rod, so that the measuring device can measure targets at different angles;

[0009] Gears are welded at the upper and lower ends of the fixed shaft, and angle indicator disks are engraved or pasted on the outer surface of the gears; the gears are located outside the bearings; the gears fix the rotating rod at a certain angle through the gear cards on the rotating rod, and the rotation range of the rotating rod is -90°~90°.

[0010] The gear card is fixed on the rotating rod by a bearing, and is moved away from the gear when the rotating rod rotates. When the rotating rod needs to be fixed, it is stuck between the gears to prevent the gears from rotating;

[0011] Furthermore, the fixed shaft is fixed to the existing anchor rod on the side of the lane through a rectangular connecting block in the middle of the rod;

[0012] The rectangular connecting block is welded to the fixed shaft, and an anchor hole and a nut slot connected to the anchor are reserved in the middle of the rectangular connecting block. The fixed shaft is fixed to the outside of the anchor tray using two inner and outer nuts.

[0013] The nut slot is a regular hexagonal groove with a groove depth of 3 mm and a side length determined according to the nut model;

[0014] The rotating rod is connected to the fixed shaft through a bearing;

[0015] The spring sheet is fixed on the upper and lower sides of the fixing box, and is in an arc shape, and is used to fix the left and right position of the rangefinder; the baffle is at the rear end of the fixing box, and is in a rectangular shape, and is welded with the adjustment screw, and the front and rear position of the rangefinder is adjusted by the nut;

[0016] The external pressing device is composed of a movable mechanism, a fixed mechanism and a spring. The inner end of the movable mechanism is provided with a button for clicking the switch of the laser rangefinder; the inner end of the fixed mechanism is welded to the lower part of the rotating rod; the movable mechanism and the fixed mechanism are cross-fixed by bearings in the middle, and the outer ends of the two are separated by spring support. After the outer end of the movable mechanism is squeezed, the inner end of the movable mechanism is pressed down accordingly.

[0017] The present invention provides a method for using the variable angle fixing device of the lane convergence laser rangefinder, comprising the following steps:

[0018] (1) Install the fixed shaft on the anchor rod through the anchor rod hole on the rectangular connecting block, adjust the rotating rod to a horizontal state, and tighten the nut;

[0019] (2) Fix the laser rangefinder between the spring sheets inside the fixing box, and adjust the nut of the baffle forward and backward so that the switch of the laser rangefinder is aligned with the button on the external pressing device;

[0020] (3) Press the movable mechanism of the external pressing device and record the reading on the laser rangefinder, that is, the horizontal distance L 平 (4) Raise the gear card and adjust the rotating rod to align it with the central reflection point of the tunnel roof, and record the corresponding angle a on the gear and the reading L on the laser rangefinder. 垂 ;

[0021] (5) Calculate the tunnel surface convergence deformation through multiple measurements: horizontal convergence △L 平 = L 平1 -L 平n ; Vertical convergence △L 垂 = L 垂1 sin(a 1 ) - L 垂n sin(a n );

[0022] The subscript 1 indicates the first measurement, and n indicates the nth measurement. (The measurement process takes 2-3 years, with daily measurements in the first month, and less and less frequent measurements thereafter, with measurements taken once a month in the last month.)

[0023] Beneficial effects of the present invention:

[0024] (1) It can stably and accurately measure tunnel deformation and has wide applicability;

[0025] (2) It is simple and convenient to fix with the outer end of the existing anchor rod, solving the problem of difficult fixation of the distance meter and large error;

[0026] (3) The fixing device can be adjusted within the range of ±90°, which is convenient for convergence measurement of the entire cross section and all directions of the tunnel;

[0027] (4) Using an external method to indirectly click the laser rangefinder button to measure the distance can avoid the measurement error caused by the upward shaking of the entire bracket due to directly clicking the rangefinder button;

[0028] (5) The front and back, left and right positions of the rangefinder can be adjusted, and it is suitable for rangefinders of various models and prices. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of the variable angle fixing device of the lane convergence laser rangefinder of the present invention;

[0030] Figure 2 yes Figure 1 A top view of

[0031] Figure 3 yes Figure 1 Left view of the structure (excluding anchor rods and walls);

[0032] Figure 4 It is a schematic diagram of the gears of the variable angle fixing device of the lane convergence laser rangefinder of the present invention;

[0033] Figure 5 It is a schematic diagram of an external pressing device of a variable angle fixing device of a lane convergence laser rangefinder of the present invention;

[0034] In the figure: 1-fixed shaft; 2-rectangular connecting block; 3-anchor rod; 4-nut; 5-tray; 6-gear; 7-rotating rod; 8-gear card; 9-baffle; 10-spring sheet; 11-laser rangefinder; 12-external pressing device; 13-button; 14-pressing device movable mechanism; 15-pressing device fixing mechanism; 16-spring; 17-bearing; 18-fixing box; 19-baffle screw; 20-anchor rod hole; 21-nut card slot; 22-baffle screw adjustment nut. DETAILED DESCRIPTION

[0035] The present invention is further illustrated by the following examples, but is not limited to the following examples.

[0036] Embodiment 1:

[0037] like Figures 1 to 5 As shown, a variable angle fixing device for a tunnel convergence laser rangefinder comprises a fixed shaft 1, a rotating rod 7, and a fixed box 18; the fixed shaft 1 is fixed to an original anchor rod 3 on the tunnel wall, the upper and lower ends of the fixed shaft 1 are respectively hinged to the rotating rod 7 through bearings 17, and the fixed box 18 is located between the upper and lower rotating rods 7;

[0038] The fixing box 18 includes a baffle 9, a spring sheet 10 and an external pressing device 12; the fixing box 18 is a rectangular parallelepiped structure, the upper end face is a transparent acrylic plate, and the lower end face, left and right end faces and rear end face are stainless steel plates; the laser rangefinder 11 is arranged inside the fixing box 18 and fixed by the spring sheet 10 and the baffle 9 in the fixing box 18; the spring sheet 10 is fixed on the left and right sides of the fixing box 18 in an arc shape, and is used to fix the left and right position of the laser rangefinder 11; the baffle 9 is at the rear end of the fixing box 18, and is rectangular, and the other end of the baffle 9 is in contact with the screw 19, and a set of adjusting nuts 22 are provided on the rear side of the fixing box 18, which are used to adjust the front and rear positions of the baffle 9, thereby fixing the front and rear positions of the laser rangefinder 11;

[0039] The fixed box 18 is welded to the rotating rod 7 as a whole, and the fixed box 18 can be rotated up and down by the rotating rod 7, so that the measuring device can measure targets at different angles;

[0040] Gears 6 are welded at the upper and lower ends of the fixed shaft 1, and an angle indicator plate is provided on the gear 6. In this embodiment, the angle indicator plate is directly engraved on the outer surface of the gear, which is not easy to fall off; the gear 6 is located on the outside of the bearing 17; the gear 6 fixes the rotating rod 7 at a certain angle through the gear card 8 on the rotating rod 7, and the rotation range of the rotating rod 7 is -90°~90°.

[0041] The gear card is fixed on the rotating rod by a bearing, and is moved away from the gear when the rotating rod rotates. When the rotating rod needs to be fixed, it is stuck between the gears to prevent the gears from rotating;

[0042] Furthermore, the fixed shaft 1 is fixed to the existing anchor rod 3 on the side of the lane through the rectangular connecting block 2 in the middle;

[0043] The rectangular connecting block 2 is welded to the fixed shaft 1 , and an anchor hole 20 and a nut slot 21 connected to the anchor are left in the middle. The fixed shaft 1 is fixed to the outside of the anchor tray 5 using two inner and outer nuts 4 .

[0044] The nut slot is a regular hexagonal groove with a groove depth of 3 mm and a side length determined according to the nut model.

[0045] The rotating rod is connected to the fixed shaft through a bearing;

[0046] The spring sheet is fixed on the left and right sides of the fixed box, and is in an arc shape, and is used to fix the left and right position of the rangefinder; the baffle is at the rear end of the fixed box, and is in a rectangular shape, and is welded with the adjustment screw, and the front and rear position of the rangefinder is adjusted by the nut;

[0047] The external pressing device 12 is composed of a pressing device movable mechanism 14, a pressing device fixing mechanism 15 and a spring 16. The inner end of the pressing device movable mechanism 14 is provided with a button 13 for clicking to control the switch of the laser rangefinder 11; the inner end of the pressing device fixing mechanism 15 is welded to the lower part of the rotating rod 7; the pressing device movable mechanism 14 and the pressing device fixing mechanism 15 are cross-fixed by bearings in the middle (in an X shape), and the outer ends of the two are supported and separated by a spring 16. After the outer end of the pressing device movable mechanism 14 is squeezed, the inner end of the pressing device movable mechanism 14 is pressed down accordingly.

[0048] The specific operation steps of the above device are as follows:

[0049] (1) Install and fix the fixed shaft 1 on the anchor rod 3 through the anchor rod hole 20 on the rectangular connecting block 2, adjust the rotating rod to a horizontal state, and tighten the nut 4;

[0050] (2) Fix the laser rangefinder 11 between the spring sheets 10 inside the fixing box 18, and adjust the nut 22 of the baffle 9 forward and backward so that the switch of the laser rangefinder is aligned with the button 13 on the external pressing device 12;

[0051] (3) Press the movable mechanism 14 of the external pressing device 12 (similar to pliers) to record the reading on the laser rangefinder 11, that is, the horizontal distance L 平 ;

[0052] (4) Raise the gear card 8 and adjust the rotating rod 7 to align it with the central reflection point of the tunnel roof. Record the corresponding angle a on the gear 6 and the reading L on the laser rangefinder 11. 垂 ;

[0053] (5) Calculate the tunnel surface convergence deformation through multiple measurements: horizontal convergence △L 平 = L 平1 -L 平n ; Vertical convergence △L 垂 = L 垂1 sin(a 1 ) - L 垂n sin(a n );

[0054] The subscript 1 indicates the first measurement, and n indicates the nth measurement. (The measurement process takes 2-3 years, with daily measurements in the first month, and less and less frequent measurements thereafter, with measurements taken once a month in the last month.)

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A variable angle fixing device for a lane convergence laser rangefinder, Features: The device comprises a fixed shaft, a rotating rod and a fixed box; the fixed shaft is fixed on the original anchor rod of the lane wall, the upper and lower ends of the fixed shaft are respectively hinged to the rotating rod through bearings, and the fixed box is located between the upper and lower rotating rods; The fixing box includes a baffle, a spring sheet and an external pressing device; the fixing box is a rectangular parallelepiped structure, the laser rangefinder is arranged inside the fixing box and fixed by the spring sheet and the baffle in the fixing box; the spring sheet is fixed on the left and right sides of the fixing box and is in an arc shape, and is used to fix the left and right position of the laser rangefinder; the baffle is at the rear end of the fixing box and is in a rectangular shape, the other end of the baffle is in contact with the screw, and there is a set of adjustment nuts on the rear side of the fixing box, which is used to adjust the front and rear position of the baffle, thereby fixing the front and rear position of the laser rangefinder; The fixed box is welded to the rotating rod as a whole, and the fixed box can be rotated up and down by the rotating rod, so that the measuring device can measure targets at different angles; Gears are welded at the upper and lower ends of the fixed shaft, and an angle indicator plate is provided on the gear; the gear is located outside the bearing; the gear fixes the rotating rod through the gear card on the rotating rod, and the rotation range of the rotating rod is -90°~90°; The gear card is fixed on the rotating rod by a bearing, and is moved away from the gear when the rotating rod rotates. When the rotating rod needs to be fixed, it is stuck between the gears to prevent the gears from rotating; The external pressing device is composed of a movable mechanism, a fixed mechanism and a spring. The inner end of the movable mechanism is provided with a button for clicking the switch of the laser rangefinder; the inner end of the fixed mechanism is welded to the lower part of the rotating rod; the movable mechanism and the fixed mechanism are cross-fixed by bearings in the middle, and the outer ends of the two are separated by spring support. After the outer end of the movable mechanism is squeezed, the inner end of the movable mechanism is pressed down accordingly; The rotating rod is connected to the fixed shaft through a bearing; the spring sheet is fixed on the left and right sides of the fixed box, and is arc-shaped, and is used to fix the left and right position of the rangefinder; the baffle is at the rear end of the fixed box, is rectangular, and is welded to the adjustment screw, and the front and rear position of the rangefinder is adjusted through a nut.

2. The variable angle fixing device of the lane convergence laser rangefinder according to claim 1, Features: The upper end surface of the fixing box is a transparent acrylic plate, and the lower end surface, left and right end surfaces and rear end surface are stainless steel plates.

3. The variable angle fixing device of the lane convergence laser rangefinder according to claim 1, Features: The fixed shaft is fixed on the original anchor rod of the lane wall through a rectangular connecting block in the middle.

4. The variable angle fixing device of the lane convergence laser rangefinder according to claim 3, Features: The rectangular connecting block is welded together with the fixed shaft, and an anchor hole and a nut slot connected to the anchor rod are left in the middle of the rectangular connecting block. The fixed shaft is fixed to the outside of the anchor tray using two inner and outer nuts; the nut slot is a regular hexagonal groove with a groove depth of 3mm and a side length determined according to the nut model.

5. The variable angle fixing device of the lane convergence laser rangefinder according to claim 1, Features: An angle indicator disc is engraved or pasted on the outer surface of the gear.

6. A method for using the variable angle fixing device of the lane convergence laser rangefinder according to any one of claims 1 to 5, Features The following steps are involved: (1) Install the fixed shaft on the anchor rod through the anchor rod hole on the rectangular connecting block, adjust the rotating rod to a horizontal state, and tighten the nut; (2) Fix the laser rangefinder between the spring sheets inside the fixing box, and adjust the nut of the baffle forward and backward so that the switch of the laser rangefinder is aligned with the button on the external pressing device; (3) Press the movable mechanism of the external pressing device and record the reading on the laser rangefinder, that is, the horizontal distance L 平 (4) Raise the gear card and adjust the rotating rod to align it with the central reflection point of the tunnel roof, and record the corresponding angle a on the gear and the reading L on the laser rangefinder. 垂 ; (5) Calculate the tunnel surface convergence deformation through multiple measurement results: Horizontal deformation △L 平 = L 平1 -L 平n ; Vertical deformation △L 垂 = sinL 垂1 -sinL 垂n ; The subscript 1 indicates the first measurement, and n indicates the nth measurement.

7. A method for using the variable angle fixing device of the lane convergence laser rangefinder according to claim 6, Features: The measurement process takes 2-3 years. The measurement should be done every day in the first month, and the frequency will become less and less thereafter, and finally once a month.

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