Device and control method for accurately controlling drilling depth of ultra-long anchor rods for slope

Abstract

The present invention belongs to the technical field of civil engineering construction, in particular to a device and a control method for accurately controlling the drilling depth of an ultra-long anchor rod for a slope, including an anchor rod drilling rig, an anchor rod body, and a cement drill bit. The anchor rod body and the cement drill bit are both installed on the surface of the anchor rod drilling rig, and a base is installed at the lower end of the anchor rod drilling rig. For the device and the control method for accurately controlling the drilling depth of the ultra-long anchor rod for the slope, by setting a measuring device to measure the traveling distance of the anchor rod drilling rig, using a linear magnetic grating in the measuring device for measurement, and transmitting the moving distance of the anchor rod drilling rig to the magnetic head through a pull rope, so that the distance that the anchor rod drilling rig drives the cement drill bit to travel is the distance that the pull rope drives the magnetic head to travel on the surface of the magnetic scale, and the magnetic head and the magnetic scale are wrapped and protected by a protective box to avoid dust and gravel from entering the surfaces of the magnetic scale and the magnetic head, ensuring the safety of the measuring equipment, and thus having the characteristic of being convenient for detecting the drilling depth of the slope anchor rod.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering construction, and particularly relates to a device and a control method for accurately controlling the drilling depth of ultra-long anchor rods for slopes. Background Art

[0002] Currently, in the form of mountain slope support, for slopes with relatively steep slopes and poor stability, concrete lattice beams and anchor cables are mostly used for reinforcement support. The anchor cables are drilled using drilling rig equipment to a certain depth according to the needs of the slope.

[0003] Most of the existing drilling depth detections are carried out by manually inserting the anchor rod into the drill hole, inserting one end of it to the bottom of the drill hole to determine the length, and then measuring the part of the anchor rod inserted into the drill hole to determine the drilling depth. This method not only has low efficiency, increases the labor of workers, but also has inaccurate measurement and is prone to errors.

[0004] For the more accurate laser ranging method, although it can measure quickly, due to a large amount of dust and sand in the hole during drilling, it affects the structure of laser measurement, resulting in a large error in the laser ranging result, so it is not convenient to use. Summary of the Invention

[0005] Based on the technical problem that the drilling depth of the existing slope anchor rod is not convenient to detect, the present invention proposes a device and a control method for accurately controlling the drilling depth of ultra-long anchor rods for slopes.

[0006] A device and a control method for accurately controlling the drilling depth of ultra-long anchor rods for slopes proposed by the present invention include an anchor rod drilling rig, an anchor rod body, and a cement drill bit. The anchor rod body and the cement drill bit are both installed on the surface of the anchor rod drilling rig. A base is installed at the lower end of the anchor rod drilling rig, and the anchor rod drilling rig slides through the base. A measuring device is installed on the lower surface of the base. The measuring device includes a linear magnetic scale, and the linear magnetic scale includes a magnetic head and a magnetic scale. The measuring device measures the drilling depth of the anchor rod body through the linear magnetic scale; a limiting device is installed on the surface of the measuring device. The limiting device includes a track plate, and the limiting device limits the movement trajectory of the magnetic head through the track plate; a starting device is installed on the end surface of the base. The starting device includes a laser probe, and the starting device measures the slope distance through the laser probe. The laser probe is the measuring probe of a laser rangefinder.

[0007] Preferably, an installation plate is fixedly connected to the lower surface of the base, a protection box is fixedly connected to the lower surface of the installation plate, the protection box is hollow with an open lower surface, one side surface of the magnetic scale is installed on the inner top wall of the protection box, the detection end surface of the magnetic head is in contact with the surface of the magnetic scale, and a winding seat is fixedly connected to the inner top wall of one end of the protection box.

[0008] Through the above technical solution, the linear magnetic grating is wrapped and protected by the protective box, so as to avoid damage to the equipment caused by dust and gravel generated during drilling.

[0009] Preferably, a driving motor is fixedly connected to the surface of the winding seat. The output shaft of the driving motor is fixedly connected to the winding roller inside the winding seat. A winding rope is wound around the surface of the winding roller of the winding seat. The end of the winding rope is fixedly connected to the side wall surface of the magnetic head. A proximity switch is installed on the side wall surface of the winding seat, and the proximity switch is located between the winding seat and the driving motor.

[0010] Through the above technical solution, the winding seat is connected to the magnetic head through the winding rope, so as to facilitate pulling the magnetic head to reset through the winding rope.

[0011] Preferably, a pulling rope is fixedly connected to the other side surface of the magnetic head. A rope hole is opened on the other side surface of the protective box. An anti-wear pad is fixedly connected to the outer surface of the other side of the protective box. The anti-wear pad is in a funnel shape. The surface of the pulling rope is slidably connected to the inner wall of the rope hole and the inner wall of the anti-wear pad. An installation rod is fixedly connected to the side wall surface of the mounting plate. A guide wheel is rotatably connected to the surface of the installation rod. The surface of the guide wheel is slidably connected to the surface of the pulling rope. The end of the pulling rope is fixedly connected to the surface of the anchor drill.

[0012] Through the above technical solution, the pulling rope is connected to the anchor drill after being guided by the anti-wear pad and the guide wheel, so as to avoid wear of the pulling rope during use and hinder the progress of the anchor drill.

[0013] Preferably, the lower end of the protective box is hinged with a bottom plate. The lower surface of the track plate is installed on the upper surface of the bottom plate. A track groove is opened on the upper surface of the track plate. The lower surface of the magnetic head is installed with a moving seat, and the lower end of the moving seat is installed with rollers.

[0014] Through the above technical solution, the rollers and the moving seat are used to support the magnetic head to approach the surface of the magnetic scale, and at the same time, it is convenient to reduce the friction generated when the magnetic head moves.

[0015] Preferably, the surface of the roller is slidably connected to the inner bottom wall of the track groove. Infrared pair-beam switches are fixedly connected to both ends of the protective box. The two infrared pair-beam switches are respectively located on both sides of the track groove. An adjustment window is opened on the outer surface of the protective box, and a baffle is slidably inserted into the inner top wall of the adjustment window.

[0016] Through the above technical solution, the infrared pair-beam switches are used to monitor both sides of the magnetic head. After the magnetic head tilts on the surface of the magnetic scale, the magnetic head itself will trigger the infrared pair-beam switches, so as to facilitate timely reminding the staff to make corrections.

[0017] Preferably, a protective frame is fixedly connected to the end surface of the base. A hidden groove is opened on the inner bottom wall of the protective frame. A hinge seat is installed on the inner bottom wall of the hidden groove. The lower end of the laser probe is installed on the upper end of the hinge seat.

[0018] Through the above technical solution, the laser probe is deflected and then embedded in the hidden groove, so as to facilitate the protection of the laser probe.

[0019] Preferably, a protective tube is threadedly sleeved on the surface of the laser probe, and a vertical groove is formed on the inner bottom wall of the protective frame. The inner wall of the vertical groove is slidably connected to the lower end surface of the protective tube.

[0020] Through the above technical solution, the protective tube is threadedly connected to the surface of the laser probe, so as to facilitate the further protection of the laser probe through the protective tube.

[0021] Preferably, a clamping groove is formed on the inner side wall of the hidden groove. The inside of the vertical groove is communicated with one end inside of the hidden groove, and the inside of the clamping groove is communicated with the other end inside of the hidden groove.

[0022] Through the above technical solution, both ends of the protective tube can be respectively embedded in the vertical groove and the clamping groove, so as to facilitate the limitation of the deflection angle of the laser probe.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. By setting a measuring device to measure the traveling distance of the bolt drill, using the linear magnetic grating in the measuring device for measurement, and transmitting the moving distance of the bolt drill to the magnetic head through a pull rope, so that the traveling distance of the bolt drill driving the cement drill bit is the same as the traveling distance of the pull rope driving the magnetic head on the surface of the magnetic scale. The magnetic head and the magnetic scale are wrapped and protected by a protective box to prevent sand and gravel from entering the surfaces of the magnetic scale and the magnetic head, ensuring the safety of the measuring equipment, and thus having the characteristic of being convenient for detecting the drilling depth of the slope bolt.

[0025] 2. By installing a limiting device on the surface of the measuring device, using the limiting plate in the limiting device to limit the traveling route of the magnetic head, installing a moving seat at the lower end of the magnetic head, reducing the friction between the lower end of the magnetic head and the limiting plate through the rollers at the lower end of the moving seat, and monitoring both sides of the magnetic head through an infrared pair of light switches. When the magnetic head tilts on the surface of the magnetic scale, the magnetic head itself will trigger the infrared pair of light switches, thus facilitating timely reminding of the staff, and enabling the staff to adjust the magnetic head by opening the adjustment window, and thus having the characteristic of being convenient for improving the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a device and a control method suitable for accurately controlling the drilling depth of an ultra-long bolt for a slope proposed by the present invention;

[0027] Figure 2Stereogram of the lower surface of the mounting plate structure of a device and control method for accurately controlling the drilling depth of ultra-long anchor bolts for slopes proposed by the present invention;

[0028] Figure 3 Expanded view of the bottom plate structure of a device and control method for accurately controlling the drilling depth of ultra-long anchor bolts for slopes proposed by the present invention;

[0029] Figure 4 Cross-sectional view of the protective box structure of a device and control method for accurately controlling the drilling depth of ultra-long anchor bolts for slopes proposed by the present invention;

[0030] Figure 5 Stereogram of the magnetic head structure of a device and control method for accurately controlling the drilling depth of ultra-long anchor bolts for slopes proposed by the present invention;

[0031] Figure 6 Cross-sectional view of the protective frame structure of a device and control method for accurately controlling the drilling depth of ultra-long anchor bolts for slopes proposed by the present invention;

[0032] Figure 7 Exposed view of the laser probe structure of a device and control method for accurately controlling the drilling depth of ultra-long anchor bolts for slopes proposed by the present invention.

[0033] In the figure: 1, anchor drill; 2, anchor bolt body; 3, cement drill bit; 4, base; 5, magnetic head; 51, magnetic scale; 52, mounting plate; 53, protective box; 54, winding base; 55, drive motor; 56, winding rope; 57, pulling rope; 58, rope hole; 59, wear-resistant pad; 510, guide wheel; 6, track plate; 61, bottom plate; 62, track groove; 63, moving seat; 64, roller; 65, infrared pair-switch; 66, adjustment window; 67, baffle; 7, laser probe; 71, protective frame; 72, hidden groove; 73, hinge seat; 74, protective tube; 75, vertical groove; 76, clamping groove. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0035] Refer to Figure 1-7, A device and control method for accurately controlling the drilling depth of ultra-long anchor rods for slopes, including an anchor rod drilling rig 1, an anchor rod body 2, and a cement drill bit 3. The anchor rod body 2 and the cement drill bit 3 are both installed on the surface of the anchor rod drilling rig 1. A base 4 is installed at the lower end of the anchor rod drilling rig 1, and the anchor rod drilling rig 1 slides through the base 4. A measuring device is installed on the lower surface of the base 4. The measuring device includes a linear magnetic grating, and the linear magnetic grating includes a magnetic head 5 and a magnetic scale 51. The measuring device measures the drilling depth of the anchor rod body 2 through the linear magnetic grating; a limiting device is installed on the surface of the measuring device. The limiting device includes an orbital plate 6, and the limiting device limits the movement trajectory of the magnetic head 5 through the orbital plate 6; a starting device is installed on the end surface of the base 4. The starting device includes a laser probe 7, and the starting device measures the slope distance through the laser probe 7. The laser probe 7 is the measuring probe of a laser rangefinder.

[0036] To facilitate the measurement of the drilling depth of the anchor rod body 2, a measuring device is provided. An installation plate 52 is fixedly connected to the lower surface of the base 4. A protective box 53 is fixedly connected to the lower surface of the installation plate 52, and the protective box 53 has a hollow lower surface with an opening. One side surface of the magnetic scale 51 is installed on the inner top wall of the protective box 53, and the detection end surface of the magnetic head 5 is in contact with the surface of the magnetic scale 51. A winding seat 54 is fixedly connected to the inner top wall at one end of the protective box 53. The linear magnetic grating is wrapped and protected by the protective box 53, so as to avoid damage to the equipment caused by sand, dust, and gravel generated during drilling; a driving motor 55 is fixedly connected to the surface of the winding seat 54, and the output shaft of the driving motor 55 is fixedly connected to the winding roller inside the winding seat 54. A winding rope 56 is wound around the surface of the winding roller of the winding seat 54, and the end of the winding rope 56 is fixedly connected to the side wall surface of the magnetic head 5. A proximity switch is installed on the side wall surface of the winding seat 54, and the proximity switch is located between the winding seat 54 and the driving motor 55. The winding seat 54 is connected to the magnetic head 5 through the winding rope 56, so as to facilitate pulling the magnetic head 5 for reset through the winding rope 56; a pull rope 57 is fixedly connected to the other side surface of the magnetic head 5. A rope hole 58 is opened on the other side surface of the protective box 53, and an anti-wear pad 59 is fixedly connected to the outer surface on the other side of the protective box 53. The anti-wear pad 59 is funnel-shaped. The surface of the pull rope 57 slides on the inner walls of the rope hole 58 and the anti-wear pad 59. An installation rod is fixedly connected to the side wall surface of the installation plate 52, and a guide wheel 510 is rotatably connected to the surface of the installation rod. The surface of the guide wheel 510 slides on the surface of the pull rope 57, and the end of the pull rope 57 is fixedly connected to the surface of the anchor rod drilling rig 1. The pull rope 57 is connected to the anchor rod drilling rig 1 after being guided by the anti-wear pad 59 and the guide wheel 510, so as to avoid wear of the pull rope 57 during use and hinder the advancement of the anchor rod drilling rig 1.

[0037] By setting up a measuring device to measure the traveling distance of the bolt drill 1, using a linear magnetic grating in the measuring device for measurement, and transmitting the moving distance of the bolt drill 1 to the magnetic head 5 through a pull rope 57, the distance that the bolt drill 1 drives the cement drill bit 3 to travel is the same as the distance that the pull rope 57 drives the magnetic head 5 to travel on the surface of the magnetic scale 51. The magnetic head 5 and the magnetic scale 51 are wrapped and protected by a protective box 53 to prevent sand and gravel from entering the surfaces of the magnetic scale 51 and the magnetic head 5, ensuring the safety of the measuring device, and thus having the characteristic of being convenient for detecting the depth of the slope bolt hole.

[0038] To improve the accuracy of the measuring device and prevent errors, a limiting device is set up. A bottom plate 61 is hinged at the lower end of the protective box 53, the lower surface of the track plate 6 is installed on the upper surface of the bottom plate 61, and a track groove 62 is opened on the upper surface of the track plate 6. A moving seat 63 is installed on the lower surface of the magnetic head 5, and a roller 64 is installed at the lower end of the moving seat 63. The magnetic head 5 is supported by the roller 64 and the moving seat 63 to be close to the surface of the magnetic scale 51, and at the same time, it is convenient to reduce the friction generated when the magnetic head 5 moves. The surface of the roller 64 is slidably connected to the inner bottom wall of the track groove 62. Infrared opposed switches 65 are fixedly connected to both ends of the protective box 53, and the two infrared opposed switches 65 are located on both sides of the track groove 62 respectively. A baffle 67 is slidably inserted into the inner top wall of the adjustment window 66 opened on the outer surface of the protective box 53. The infrared opposed switches 65 are used to monitor both sides of the magnetic head 5. After the magnetic head 5 tilts on the surface of the magnetic scale 51, the magnetic head 5 itself will trigger the infrared opposed switch 65, which is convenient to timely remind the staff to make corrections.

[0039] By installing a limiting device on the surface of the measuring device, using the limiting plate in the limiting device to limit the traveling route of the magnetic head 5, installing a moving seat 63 at the lower end of the magnetic head 5, reducing the friction between the lower end of the magnetic head 5 and the limiting plate through the roller 64 at the lower end of the moving seat 63, and monitoring both sides of the magnetic head 5 through the infrared opposed switch 65. After the magnetic head 5 tilts on the surface of the magnetic scale 51, the magnetic head 5 itself will trigger the infrared opposed switch 65, which is convenient to timely remind the staff. The staff can adjust the magnetic head 5 by opening the adjustment window 66, thus having the characteristic of being convenient to improve the accuracy of the detection result.

[0040] In order to detect the starting distance of the bolt drill 1, a starting device is provided. A protective frame 71 is fixedly connected to the end surface of the base 4, and a hidden groove 72 is formed in the inner bottom wall of the protective frame 71. A hinge seat 73 is installed on the inner bottom wall of the hidden groove 72. The lower end of the laser probe 7 is installed on the upper end of the hinge seat 73. By deflecting the laser probe 7 and embedding it into the hidden groove 72, it is convenient to protect the laser probe 7. A protective tube 74 is threadedly sleeved on the surface of the laser probe 7. A vertical groove 75 is formed in the inner bottom wall of the protective frame 71, and the inner wall of the vertical groove 75 is slidably connected to the lower surface of the protective tube 74. By threadedly connecting the protective tube 74 to the surface of the laser probe 7, it is convenient to further protect the laser probe 7 through the protective tube 74. A clamping groove 76 is formed in the inner side wall of the hidden groove 72. The inside of the vertical groove 75 communicates with one end inside of the hidden groove 72, and the inside of the clamping groove 76 communicates with the other end inside of the hidden groove 72. By enabling both ends of the protective tube 74 to be respectively embedded into the vertical groove 75 and the clamping groove 76, it is convenient to limit the deflection angle of the laser probe 7.

[0041] Working principle:

[0042] Step 1: Open the bottom plate 61, install the magnetic head 5 on the surface of the track plate 6 through the moving seat 63, and make the roller 64 embed into the track groove 62. Close the bottom plate 61 to the lower surface of the protective box 53 and fix the bottom plate 61 with bolts. The magnetic head 5 approaches the surface of the magnetic scale 51 as the bottom plate 61 closes. Start the drive motor 55. The drive motor 55 drives the winding roller in the winding seat 54 to wind the winding rope 56. The winding rope 56 pulls the magnetic head 5 to move to the starting point of the magnetic scale 51, and then turn off the drive motor 55.

[0043] Step 2: According to the depth of the pre-drilled hole, splice the bolt body 2 and install it on the surface of the bolt drill 1. Install the cement drill bit 3 at the end of the bolt body 2. Move the bolt drill 1 to the front of the drilling point, push the bolt drill 1 body to move forward on the surface of the base 4, align the end of the bolt body 2 with the upper end of the hinge seat 73, and record the travel data of the linear magnetic grating at this time as b. Unscrew the protective tube 74 from the clamping groove 76, thereby driving the protective tube 74 and the laser probe 7 to deflect. Screw the protective tube 74 downward so that the lower end of the protective tube 74 enters the vertical groove 75.

[0044] Step 3: Start the laser probe 7. The laser probe 7 measures the distance between the current position and the slope surface as a. The laser probe 7 transmits the measurement data to the data unit of the linear magnetic grating through the laser rangefinder. Rotate the protective tube 74 upward to deflect the laser probe 7 and the protective tube 74 into the hidden groove 72. Continue to unscrew the protective tube 74 so that the upper end of the protective tube 74 is stuck in the clamping groove 76. Start the bolt drill 1. While the bolt drill 1 drives the cement drill bit 3 to move forward, drill the surface of the slope.

[0045] Step 4, when the bolt drill 1 travels on the surface of the base 4, the bolt drill 1 pulls the pulling rope 57, the pulling rope 57 drives the magnetic head 5 to move on the surface of the magnetic scale 51, and at the same time the magnetic head 5 pulls the winding rope 56. When the drilling is completed, record the linear magnetic grating data at this time as c, measure the length of the cement drill bit 3 as d, and the actual drilling depth is c minus b, then minus a, and finally plus d.

[0046] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A device suitable for accurately controlling the drilling depth of ultra-long anchor bolts on slopes, comprising an anchor bolt drilling rig (1), an anchor bolt body (2) and a cement drill bit (3). It is characterized in that: Both the anchor bolt body (2) and the cement drill bit (3) are installed on the surface of the anchor bolt drilling rig (1). A base (4) is installed at the lower end of the anchor bolt drilling rig (1). The anchor bolt drilling rig (1) slides through the base (4). A measuring device is installed on the lower surface of the base (4). The measuring device includes a linear magnetic grating. The linear magnetic grating includes a magnetic head (5) and a magnetic scale (51). The measuring device measures the drilling depth of the anchor bolt body (2) through the linear magnetic grating. A limiting device is installed on the surface of the measuring device. The limiting device includes a track plate (6). The limiting device limits the movement trajectory of the magnetic head (5) through the track plate (6). An initial device is installed on the end surface of the base (4). The initial device includes a laser probe (7). The initial device measures the slope distance through the laser probe (7). The lower surface of the base (4) is fixedly connected with a mounting plate (52). The lower surface of the mounting plate (52) is fixedly connected with a protective box (53). The protective box (53) is hollow with an open lower surface. One side surface of the magnetic scale (51) is installed on the inner top wall of the protective box (53). The detection end surface of the magnetic head (5) is in contact with the surface of the magnetic scale (51). A winding seat (54) is fixedly connected to the inner top wall at one end of the protective box (53). A driving motor (55) is fixedly connected to the surface of the winding seat (54). The output shaft of the driving motor (55) is fixedly connected with a winding roller in the winding seat (54). A winding rope (56) is wound around the surface of the winding roller of the winding seat (54). The end of the winding rope (56) is fixedly connected to the side wall surface of the magnetic head (5). A proximity switch is installed on the side wall surface of the winding seat (54). The proximity switch is located between the winding seat (54) and the driving motor (55). A pulling rope (57) is fixedly connected to the other side surface of the magnetic head (5). A rope hole (58) is formed on the other side surface of the protective box (53). An anti-wear pad (59) is fixedly connected to the outer surface on the other side of the protective box (53). The anti-wear pad (59) is funnel-shaped. The surface of the pulling rope (57) is slidably connected to the inner walls of both the rope hole (58) and the anti-wear pad (59). A mounting rod is fixedly connected to the side wall surface of the mounting plate (52). A guide wheel (510) is rotatably connected to the surface of the mounting rod. The surface of the guide wheel (510) is slidably connected to the surface of the pulling rope (57). The end of the pulling rope (57) is fixedly connected to the surface of the anchor bolt drilling rig (1).

2. The device suitable for accurately controlling the drilling depth of ultra-long anchor bolts on slopes according to claim 1. It is characterized in that: The lower end of the protection box (53) is hinged with a bottom plate (61). The lower surface of the track plate (6) is mounted on the upper surface of the bottom plate (61). The upper surface of the track plate (6) is provided with a track groove (62). The lower surface of the magnetic head (5) is mounted with a moving seat (63). The lower end of the moving seat (63) is mounted with a roller (64).

3. The device for accurately controlling the drilling depth of an ultra-long anchor rod for a slope according to claim 2, characterized in that: The surface of the roller (64) is slidably connected to the inner bottom wall of the track groove (62). Infrared light-emitting and receiving switches (65) are fixedly connected to both ends of the protection box (53). The two infrared light-emitting and receiving switches (65) are respectively located on both sides of the track groove (62). An adjustment window (66) is opened on the outer surface of the protection box (53). A baffle (67) is slidably inserted into the inner top wall of the adjustment window (66).

4. The device for accurately controlling the drilling depth of an ultra-long anchor rod for a slope according to claim 1, characterized in that: The end surface of the base (4) is fixedly connected with a protection frame (71). A hidden groove (72) is opened on the inner bottom wall of the protection frame (71). A hinge seat (73) is mounted on the inner bottom wall of the hidden groove (72). The lower end of the laser probe (7) is mounted on the upper end of the hinge seat (73).

5. The device for accurately controlling the drilling depth of an ultra-long anchor rod for a slope according to claim 4, characterized in that: A protection tube (74) is threadedly sleeved on the surface of the laser probe (7). An upright groove (75) is opened on the inner bottom wall of the protection frame (71). The inner wall of the upright groove (75) is slidably connected to the lower surface of the protection tube (74).

6. The device for accurately controlling the drilling depth of an ultra-long anchor rod for a slope according to claim 5, characterized in that: A clamping groove (76) is opened on the inner side wall of the hidden groove (72). The inside of the upright groove (75) communicates with one end inside of the hidden groove (72). The inside of the clamping groove (76) communicates with the other end inside of the hidden groove (72).

7. The calculation method of the device for accurately controlling the drilling depth of an ultra-long anchor rod for a slope according to any one of claims 1-6, characterized in that, specifically includes the following steps: Step 1, open the bottom plate (61), install the magnetic head (5) on the surface of the track plate (6) through the moving seat (63), and make the roller (64) embed into the track groove (62). Close the bottom plate (61) to the lower surface of the protection box (53), and fix the bottom plate (61) with bolts. The magnetic head (5) approaches the surface of the magnetic scale (51) as the bottom plate (61) is closed. Start the drive motor (55). The drive motor (55) drives the winding roller in the winding seat (54) to wind the winding rope (56). The winding rope (56) pulls the magnetic head (5) to move to the starting point of the magnetic scale (51). Turn off the drive motor (55); Step 2: Splice the anchor rod body (2) according to the pre-drilled penetration and install it on the surface of the anchor rod drill (1). Install the cement drill bit (3) at the end of the anchor rod body (2). Move the anchor rod drill (1) to the front of the drilling point, and push the body of the anchor rod drill (1) to travel on the surface of the base (4) so that the end of the anchor rod body (2) is aligned with the upper end of the hinge seat (73). Record the travel data of the linear magnetic grating at this time as b. Unscrew the protective tube (74) from the card slot (76), thereby driving the protective tube (74) and the laser probe (7) to deflect. Screw the protective tube (74) downward so that the lower end of the protective tube (74) enters the vertical groove (75). Step 3: Start the laser probe (7). The laser probe (7) measures the distance between the current position and the slope surface as a. The laser probe (7) transmits the measurement data to the data unit of the linear magnetic grating through the laser rangefinder. Rotate the protective tube (74) upward to deflect the laser probe (7) and the protective tube (74) into the hidden groove (72). Unscrew the protective tube (74) further so that the upper end of the protective tube (74) is clamped into the card slot (76). Start the anchor rod drill (1). While the anchor rod drill (1) drives the cement drill bit (3) to travel, drill the surface of the slope. Step 4: When the anchor rod drill (1) travels on the surface of the base (4), the anchor rod drill (1) pulls the pull rope (57). The pull rope (57) drives the magnetic head (5) to move on the surface of the magnetic scale (51). At the same time, the magnetic head (5) pulls the winding rope (56). At the end of the drilling, record the linear magnetic grating data at this time as c. Measure the length of the cement drill bit (3) as d. The actual drilling depth is c minus b, then minus a, and finally plus d.

Images