Angle control device and method for anchor rod drill rod

Abstract

The invention discloses an angle control device and method for an anchor rod drill rod, and relates to the field of anchor rod monitoring, the angle control device comprises a frame, the bottom of the frame is fixedly connected with a sleeve, the center of an inner cavity of the frame is provided with a control mechanism, and the bottom of the frame is provided with a limiting mechanism. According to the device, the three annularly-arranged limiting wheels make continuous contact with the surface of the anchor rod, dynamic limiting and monitoring of the posture and the insertion angle of the anchor rod are achieved, the limiting wheels can conduct fine adjustment and automatic adaptation along with the angle of the anchor rod, posture deviation signals are collected in real time through contact resistance changes, and a driving system drives a rotating ring and a movable sleeve through a lead screw; angle deflection of the driving rod is achieved, so that the limiting wheels are guided to flexibly adjust the positions, it is ensured that the limiting wheels are tightly attached to the anchor rod, the three-point linkage design enables the limiting wheels to move cooperatively, multi-point balanced attachment is kept, and the stability, precision and posture recognition capacity of anchor rod insertion are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of anchor rod monitoring, and in particular to a device and method for controlling the angle of an anchor rod drill rod. Background Art

[0002] Anchor bolts are a fundamental component of tunnel support in modern coal mines. They reinforce the surrounding rock of the tunnel, allowing it to support itself. Anchor bolts are used not only in mining but also in engineering technology, reinforcing slopes, tunnels, and dams. As a tensile member embedded deep into the ground, the anchor bolt is connected to the engineering structure at one end and extends into the ground at the other. The entire bolt is divided into a free section and an anchoring section. The free section transmits the tensile force at the bolt head to the anchor body, thereby applying prestress to the bolt.

[0003] However, in the existing technology, if the anchor drill rod angle cannot be controlled, it is easy to cause the anchor rod insertion direction to deviate from the designed axis, which in turn causes the following problems: first, the mechanical transmission path between the anchor rod and the surrounding rock is unreasonable, which affects the force efficiency and reduces the support effect; second, the anchor rod passes through the surrounding rock layer or is misplaced and inserted into the weak layer, which cannot form an effective anchoring, resulting in a decrease in overall stability. In severe cases, it will cause deformation of the surrounding rock or failure of the support system.

[0004] If the anchoring condition of the anchor rod cannot be monitored, it will be impossible to determine whether a good bond is formed between the anchoring agent, the anchor rod and the surrounding rock. Once defects such as cavities, cracks, and loose grouting exist, it is very easy to form "virtual anchors" or "empty anchors", resulting in insufficient anchoring force or failure. In the absence of timely detection methods, problems cannot be discovered and corrected during the construction process, leaving hidden dangers to subsequent structural safety. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for controlling the angle of an anchor drill rod, so as to solve the problem raised in the above-mentioned background technology that if the angle of the anchor drill rod cannot be controlled, it is easy for the anchor rod insertion direction to deviate from the design axis, the anchoring condition of the anchor rod cannot be monitored, and it is impossible to judge whether a good bond is formed between the anchor agent and the anchor rod and the surrounding rock.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a device for controlling the angle of an anchor drill rod, comprising a frame, a casing fixedly connected to the bottom of the frame, a control mechanism installed in the center of the inner cavity of the frame, and a limit mechanism installed at the bottom of the frame;

[0007] The limiting mechanism includes a mounting frame, a plurality of support blocks are fixedly connected to the side wall of the mounting frame, one end of the support block is rotatably connected to a driving rod, an outer surface of one end of the driving rod is slidably connected to a movable sleeve, an inner side of one end of the driving rod is rotatably connected to a limiting wheel, the side wall of the mounting frame is rotatably connected to a first rotating ring, the side wall of the first rotating ring is fixedly connected to a fixed rod, one end of the fixed rod is fixedly connected to a second rotating ring, both sides of the movable sleeve are fixedly connected to a center rod, one end of one center rod is rotatably connected to the first rotating ring, and the other center rod is rotatably connected to the side wall of the second rotating ring, a protrusion is fixedly connected to the outer surface of the top of the first rotating ring, the side wall of the protrusion is rotatably connected to the movable block, and the inner side of the movable block is threadedly connected to a screw rod.

[0008] Preferably, the control mechanism includes a fixed plate, a protective plate is fixedly connected to the side wall of the fixed plate, and a counter is fixedly installed on the inner side of the fixed plate.

[0009] Preferably, the output end of the counter is fixedly connected to a roller, and the roller is rotatably installed on the inner side of the protective plate.

[0010] Preferably, a through hole is opened on the surface of the sleeve, the bottom end of the roller passes through the through hole, and the bottom end of the roller extends to the inside of the sleeve.

[0011] Preferably, the side wall of the mounting frame is rotatably connected to a rotating block, the side wall of the rotating block is fixedly mounted with a second driving motor, and the output end of the second driving motor is fixedly connected to the screw rod.

[0012] Preferably, the top of the mounting frame is fixedly connected to the fixing plate, and the middle of the mounting frame is fixedly connected to the sleeve.

[0013] Preferably, a meter counter and a dual-axis digital display inclinometer are fixedly mounted on one side of the inner cavity of the frame, and a measuring instrument is fixedly mounted on the inner wall of the frame.

[0014] A method for using an anchor drill rod angle control device comprises the following steps:

[0015] Step 1: Anchor bolt positioning and depth measurement mechanism: The roller is vertical and closely fitted to the anchor bolt axis. As the anchor bolt advances, the roller rotates accordingly, and the counter records the number of rotations in real time. The meter host can accurately calculate the anchor bolt's drilling depth based on the number of rotations, and display and store the data in real time;

[0016] Step 2: Angle control and insertion direction restriction structure: Use the sleeve to constrain the insertion direction of the anchor rod, and achieve preliminary control of the anchor rod insertion angle by adjusting the installation angle of the sleeve;

[0017] Step 3: The limiting wheel adjusts the driving mechanism. The second driving motor drives the screw to rotate, pushing the movable block to move along the screw. The movable block drives the connected protrusion to move synchronously, thereby driving the first rotating ring to rotate, and driving the second rotating ring to rotate synchronously through the fixed rod;

[0018] Step 4: Resistivity testing principle and anchoring quality assessment: After the anchor rod is inserted and reaches the preset depth, the resistivity of the anchoring section can be tested using a measuring instrument;

[0019] Step 5: Ultrasonic detection mechanism and defect identification: ultrasonic signals are applied to analyze the propagation characteristics of the anchoring section.

[0020] Preferably, when the first rotating ring and the second rotating ring rotate synchronously in step 2, the movable sleeve is driven to rotate and slide along the driving rod, and finally the driving rod is rotated with the support block as the center. If the anchoring agent is in close contact with the interface between the anchor rod and the surrounding rock in step 4, the measured resistivity value is stable and meets the design requirements. When the anchoring agent is tightly combined with the interface between the surrounding rock in step 5, the ultrasonic propagation path is continuous, the energy attenuation is small, the sound speed is fast, the echo signal is clear and the waveform is regular.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, three limiting wheels arranged in a ring are in continuous contact with the surface of the anchor rod, so as to realize dynamic limiting and monitoring of the anchor rod posture and insertion angle. The limiting wheels can automatically adapt with the fine adjustment of the anchor rod angle, and collect the posture deviation signal in real time through the change of contact resistance. The driving system drives the rotating ring and the movable sleeve through the screw rod to realize the angular deflection of the driving rod, thereby guiding the limiting wheels to flexibly adjust their position to ensure close contact with the anchor rod. The three-point linkage design enables the limiting wheels to move in coordination and maintain a balanced fit at multiple points, effectively improving the stability, accuracy and posture recognition ability of the anchor rod insertion.

[0023] 2. In the present invention, the roller and the anchor rod axis are in close vertical fit, and the system can use a counter to record the number of rotations of the roller, and the meter host can calculate and display the drilling depth in real time, thereby realizing depth monitoring of the entire process. At the same time, the host has a data storage function, and some equipment can also be linked with the drilling rig control system to complete automatic recording and data synchronization, thereby improving work efficiency and management level. In conjunction with the installation of casing and limiting mechanism, it can effectively limit the insertion direction and angle of the anchor rod, ensuring that the anchor rod is inserted strictly according to the designed position, thereby improving positioning accuracy and construction quality.

[0024] 3. In the present invention, after the anchor rod is inserted, the resistivity of the anchoring section is detected by using a measuring instrument, which can preliminarily judge the contact and bonding quality between the anchor agent, the anchor rod and the surrounding rock. Abnormal resistivity indicates the possible existence of voids or cracks. Further combined with ultrasonic detection technology, by analyzing the sound speed, waveform and signal attenuation, the structural abnormality area in the anchor body can be efficiently identified. The tightly bonded interface is manifested as a regular waveform and a fast sound speed, and the presence of defects is manifested as abnormal echo and obvious energy attenuation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is a schematic diagram of the overall structure of a device for controlling the angle of an anchor drill rod according to the present invention;

[0026] Figure 2 This is a side structural schematic diagram of a device for controlling the angle of an anchor drill rod according to the present invention;

[0027] Figure 3 This is a front view structural diagram of a device for controlling the angle of an anchor drill rod according to the present invention;

[0028] Figure 4 This is a schematic cross-sectional view of a device for controlling the angle of an anchor drill rod according to the present invention;

[0029] Figure 5 This is a schematic structural diagram of a limiting mechanism for an anchor drill rod angle control device according to the present invention;

[0030] Figure 6 This is a schematic diagram of the disassembled structure of a limiting mechanism for an anchor drill rod angle control device according to the present invention;

[0031] Figure 7 The present invention is a schematic front view of the structure of a limit mechanism for an anchor drill rod angle control device.

[0032] In the figure: 1. frame; 11. meter counter host; 12. dual-axis digital inclinometer; 2. control mechanism; 21. counter; 22. fixed plate; 23. protective plate; 24. roller; 3. sleeve; 31. through hole; 4. measuring instrument; 5. limiting mechanism; 51. mounting frame; 52. movable block; 53. driving rod; 531. supporting block; 54. first rotating ring; 541. protrusion; 55. movable sleeve; 551. center rod; 56. second rotating ring; 561. fixed rod; 57. limiting wheel; 58. second driving motor; 581. rotating block; 59. screw rod. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] Example 1: Reference Figure 1-Figure 7 As shown: A device for controlling the angle of an anchor drill rod, comprising a frame 1, a casing 3 fixedly connected to the bottom of the frame 1, a control mechanism 2 installed in the center of the inner cavity of the frame 1, and a limit mechanism 5 installed at the bottom of the frame 1;

[0035] The limiting mechanism 5 includes a mounting frame 51, and a plurality of supporting blocks 531 are fixedly connected to the side wall of the mounting frame 51, one end of the supporting block 531 is rotatably connected to the driving rod 53, and the outer surface of one end of the driving rod 53 is slidably connected to the movable sleeve 55, and the inner side of one end of the driving rod 53 is rotatably connected to the limiting wheel 57, the side wall of the mounting frame 51 is rotatably connected to the first rotating ring 54, the side wall of the first rotating ring 54 is fixedly connected to the fixing rod 561, and one end of the fixing rod 561 is fixedly connected to the second rotating ring 56, and both sides of the movable sleeve 55 are fixedly connected to the center rod 551, one end of one center rod 551 is rotatably connected to the first rotating ring 54, and the other center rod 551 is rotatably connected to the side wall of the second rotating ring 56, the outer surface of the top end of the first rotating ring 54 is fixedly connected to the protrusion 541, the side wall of the protrusion 541 is rotatably connected to the movable block 52, and the inner side of the movable block 52 is threadedly connected to the screw rod 59.

[0036] In this embodiment, the limiting mechanism 5 is equipped with three limiting wheels 57, evenly arranged in a circular pattern. Each limiting wheel 57 contacts the surface of the anchor rod, dynamically limiting and monitoring the anchor rod's posture and insertion direction. While maintaining continuous contact with the anchor rod's surface, the limiting wheels 57 automatically adapt to even minor changes in the rod's angle, effectively ensuring a close fit between the limiting mechanism and the rod. Each limiting wheel 57, through changes in contact resistance with the anchor rod, also captures angle deviation signals in real time, converting them into electrical parameters for analysis and processing, enabling anchor rod posture recognition and angle monitoring.

[0037] The second drive motor 58 rotates the screw 59, which in turn propels the movable block 52 mounted on the screw 59 axially. The movable block 52, threadedly engaged with the screw 59, possesses a certain degree of self-locking capability, maintaining its position when the drive stops, improving positioning accuracy and stability. The movement of the movable block 52 causes the lug 541 attached to it to translate synchronously, which in turn drives the first rotating ring 54 to rotate in a limited manner about its axis.

[0038] Therefore, while the screw rod 59 drives the movable block 52 to move axially, the protrusion 541 connected to the movable block 52 guides the first rotating ring 54 to rotate. At the same time, the rotation of the first rotating ring 54 is transmitted to the second rotating ring 56 via the fixedly connected fixing rod 561, achieving synchronous and linked rotation of the first and second rotating rings 54, 56.

[0039] The rotation of the second rotating ring 56 further drives the central rod 551, driving the movable sleeve 55 on it to produce a complex motion. The movable sleeve 55 not only slides but also, in conjunction with the track guide structure, produces deflection during rotation, causing the driving rod 53 to deflect a certain angle around its bottom support block 531. This deflection adjustment allows the limiting wheel 57 at the end of the driving rod 53 to flexibly adjust its position to accommodate changes in the anchor rod insertion angle, ensuring a consistent fit.

[0040] The rotation of the first rotating ring 54 drives the entire three-point linkage mechanism, allowing the three movable sleeves 55 to coordinately drive the three drive rods 53 to adjust synchronously, ensuring that the three limiting wheels 57 maintain a balanced contact with the anchor surface, achieving multi-point posture control. This multi-point linkage limiting mechanism not only dynamically guides and limits the anchor, but also enables real-time perception and feedback of the anchor's posture parameters by detecting the contact state between the limiting wheels 57 and the anchor, changes in resistance signals, and friction characteristics.

[0041] Example 2: Figure 3-Figure 4 As shown, the control mechanism 2 includes a fixed plate 22, a protective plate 23 is fixedly connected to the side wall of the fixed plate 22, and a counter 21 is fixedly installed on the inner side of the fixed plate 22. The output end of the counter 21 is fixedly connected to a roller 24, and the roller 24 is rotatably installed on the inner side of the protective plate 23. A through hole 31 is opened on the surface of the sleeve 3, and the bottom end of the roller 24 passes through the through hole 31, and the bottom end of the roller 24 extends to the inner side of the sleeve 3. A rotating block 581 is rotatably connected to the side wall of the mounting frame 51, and a second drive motor 58 is fixedly installed on the side wall of the rotating block 581, and the output end of the second drive motor 58 is fixedly connected to the screw rod 59. The top of the mounting frame 51 is fixedly connected to the fixed plate 22, and the middle part of the mounting frame 51 is fixedly connected to the sleeve 3. The meter main unit 11 and the dual-axis digital inclinometer 12 are fixedly installed on one side of the inner cavity of the frame 1, and the measuring instrument 4 is fixedly installed on the inner wall of the frame 1.

[0042] In this embodiment, during anchor bolt positioning, roller 24 is perpendicular and closely aligned with the anchor bolt axis. Counter 21 records the number of rotations of roller 24, which meter counter 11 uses to calculate the drilling depth in real time. During the rotation of roller 24, meter counter 11 not only displays the drilling depth in real time but also stores the relevant data. Some devices also support connection to the drilling rig control system for automatic recording and data synchronization.

[0043] In addition, the insertion method of the anchor rod can be restricted by installing the sleeve 3. By controlling the installation angle of the sleeve 3, the insertion direction of the anchor rod can be effectively constrained. During the insertion process, in order to further enhance the angle restriction effect, it can be used in conjunction with the limit mechanism 5.

[0044] After the anchor bolt has been inserted and reached the predetermined depth, the resistivity of the anchoring section can be tested using the measuring instrument 4. When the anchoring agent, the anchor bolt, and the surrounding rock are in close contact and the interface is well bonded, the measured resistivity value is stable and meets the design requirements, indicating that the anchoring system has good integrity and density. If defects such as cavities or cracks exist between the anchoring agent and the surrounding rock or the anchor bolt, the insulating properties of air or the conductivity of water will cause significant resistivity anomalies, thus providing a preliminary assessment of whether there are any problems with the anchoring quality.

[0045] When combined with ultrasonic testing, ultrasonic signals can be applied to the anchor section and their propagation characteristics analyzed. When the anchor is tightly bonded to the surrounding rock interface, the ultrasonic wave has little energy attenuation during propagation, a continuous propagation path, a high sound velocity, and a clear echo signal with a regular waveform, indicating that the anchor section is structurally intact. If there are cavities or loose media, the air and loose materials will strongly attenuate and scatter ultrasonic waves, causing rapid attenuation of signal energy, a decrease in sound velocity, waveform distortion, or abnormal echoes. By comprehensively analyzing changes in sound velocity, waveform characteristics, and signal attenuation, the location and extent of defects in the anchor body can be accurately identified, enabling multi-dimensional, quantitative testing of the integrity, density, and structural safety of the anchor system.

[0046] Example 3: A method for using an anchor drill rod angle control device comprises the following steps:

[0047] 1) Anchor bolt positioning and depth measurement mechanism: The roller 24 is perpendicular and closely attached to the anchor bolt axis. As the anchor bolt advances, the roller 24 rotates accordingly, and the counter 21 records the number of rotations in real time. The meter host 11 can accurately calculate the anchor bolt's drilling depth based on the number of rotations, and display and store the data in real time;

[0048] 2) Angle control and insertion direction restriction structure, which uses the sleeve 3 to constrain the insertion direction of the anchor rod and achieves preliminary control of the anchor rod insertion angle by adjusting the installation angle of the sleeve 3;

[0049] 3) The limiting wheel 57 adjusts the drive mechanism, and the second drive motor 58 drives the screw 59 to rotate, pushing the movable block 52 to move along the screw 59. The movable block 52 drives the connected protrusion 541 to move synchronously, thereby driving the first rotating ring 54 to rotate, and the second rotating ring 56 to rotate synchronously through the fixed rod 561;

[0050] 4) Resistivity testing principle and anchoring quality assessment: After the anchor rod is inserted and reaches the preset depth, the resistivity of the anchoring section can be tested using the measuring instrument 4;

[0051] 5) Ultrasonic detection mechanism and defect identification, by applying ultrasonic signals to analyze the propagation characteristics of the anchoring section.

[0052] In step 2, when the first rotating ring 54 and the second rotating ring 56 rotate synchronously, the movable sleeve 55 is driven to rotate and slide along the driving rod 53, and finally the driving rod 53 is rotated around the supporting block 531.

[0053] If the anchoring agent is in close contact with the interface between the anchor rod and the surrounding rock in step 4, the measured resistivity value is stable and meets the design requirements. In step 5, when the anchoring agent is in close contact with the interface between the surrounding rock, the ultrasonic wave propagation path is continuous, the energy attenuation is small, the sound speed is fast, and the echo signal is clear and the waveform is regular.

[0054] The device's usage and operating principle: When positioning an anchor, roller 24 is perpendicular and closely aligned with the anchor axis. Counter 21 records the number of rotations of roller 24, which allows meter counter 11 to calculate the drilling depth in real time. As roller 24 rotates, meter counter 11 displays the drilling depth in real time and stores the data. Some devices also support connection to the drilling rig control system for automatic recording and data synchronization.

[0055] Furthermore, the insertion method of the anchor rod can be restricted by installing the sleeve 3. By controlling the installation angle of the sleeve 3, the insertion angle of the anchor rod can be effectively restricted. During the insertion process, to further ensure the angle restriction effect, it can be used in conjunction with the limiting mechanism 5. The limiting mechanism 5 is equipped with three limiting wheels 57, each of which contacts the surface of the anchor rod. Even if the anchor rod angle changes, the limiting wheels 57 maintain contact with it. Not only does this limit the position, it can also be used to detect the anchor rod angle through changes in resistance, realizing angle monitoring and posture recognition functions.

[0056] Regarding the control of the limiting wheel 57, the second drive motor 58 drives the screw 59 to rotate, thereby driving the movable block 52 mounted thereon to move along the screw 59. As the movable block 52 moves, it also drives the attached protrusion 541 to move, which in turn drives the first rotating ring 54 to rotate. Because the first rotating ring 54 is restricted and can only achieve rotational movement, the movable block 52 achieves both linear movement and rotation on the surface of the screw 59, thereby maintaining synchronous rotation between the screw 59 and the rotating block 581.

[0057] As the first rotating ring 54 rotates, the fixed rod 561 drives the second rotating ring 56 to rotate in conjunction. During the synchronous rotation of the first and second rotating rings 54, 56, the center rod 551 drives the movable sleeve 55 to achieve a compound motion, that is, it rotates and slides along the direction of the driving rod 53, causing the driving rod 53 to deflect about the support block 531.

[0058] This rotation mechanism synchronizes the movement of the three movable sleeves 55, driving the corresponding three drive rods 53 to simultaneously adjust the positions of their respective limiting wheels 57. The limiting wheels 57 then approach and engage the anchor rod. Through contact with the anchor rod, they dynamically limit the insertion direction and posture of the anchor rod. Furthermore, changes in contact resistance enable real-time monitoring and feedback of angles, electrical, or mechanical parameters.

[0059] The resistivity is measured by measuring instrument 4 based on the obtained anchor rod insertion depth. When the anchoring agent is in close contact with the anchor rod and surrounding rock, the resistivity value is stable and meets the design expectation. If there is a cavity, the resistivity will increase or decrease significantly due to the presence of air or water.

[0060] During ultrasonic combined testing, for dense anchor sections, the energy attenuation of ultrasonic waves is small and the sound speed is fast when passing through the anchor-surrounding rock interface. For defective areas, the ultrasonic waves attenuate significantly when propagating in air or loose media, resulting in reduced sound speed and waveform distortion.

[0061] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for controlling the angle of an anchor drill rod, comprising a frame (1), a casing (3) fixedly connected to the bottom of the frame (1), and characterized in that: A control mechanism (2) is installed at the center of the inner cavity of the frame (1), and a limiting mechanism (5) is installed at the bottom of the frame (1); The limiting mechanism (5) includes a mounting frame (51), a plurality of support blocks (531) are fixedly connected to the side wall of the mounting frame (51), one end of the support block (531) is rotatably connected to a driving rod (53), an outer surface of one end of the driving rod (53) is slidably connected to a movable sleeve (55), an inner side of one end of the driving rod (53) is rotatably connected to a limiting wheel (57), a first rotating ring (54) is rotatably connected to the side wall of the mounting frame (51), a fixed rod (561) is fixedly connected to the side wall of the first rotating ring (54), and the fixed rod (561) is rotatably connected to the side wall of the first rotating ring (54). 1) One end is fixedly connected to a second rotating ring (56), and both sides of the movable sleeve (55) are fixedly connected to center rods (551), one end of one center rod (551) is rotatably connected to the first rotating ring (54), and the other center rod (551) is rotatably connected to the side wall of the second rotating ring (56), a protrusion (541) is fixedly connected to the outer surface of the top end of the first rotating ring (54), and a movable block (52) is rotatably connected to the side wall of the protrusion (541), and a screw rod (59) is threadedly connected to the inner side of the movable block (52).

2. The device for controlling the angle of an anchor drill rod according to claim 1, characterized in that: The control mechanism (2) comprises a fixed plate (22), a side wall of the fixed plate (22) is fixedly connected with a protective plate (23), and a counter (21) is fixedly installed on the inner side of the fixed plate (22).

3. The device for controlling the angle of an anchor drill rod according to claim 2, characterized in that: The output end of the counter (21) is fixedly connected with a roller (24), and the roller (24) is rotatably mounted on the inner side of the protective plate (23).

4. The device for controlling the angle of an anchor drill rod according to claim 3, characterized in that: A through hole (31) is provided on the surface of the sleeve (3), the bottom end of the roller (24) passes through the through hole (31), and the bottom end of the roller (24) extends to the inside of the sleeve (3).

5. The device for controlling the angle of an anchor drill rod according to claim 4, characterized in that: The side wall of the mounting frame (51) is rotatably connected to a rotating block (581), the side wall of the rotating block (581) is fixedly mounted with a second drive motor (58), and the output end of the second drive motor (58) is fixedly connected to the screw rod (59).

6. The device for controlling the angle of an anchor drill rod according to claim 1, characterized in that: The top of the mounting frame (51) is fixedly connected to the fixing plate (22), and the middle of the mounting frame (51) is fixedly connected to the sleeve (3).

7. The device for controlling the angle of an anchor drill rod according to claim 1, characterized in that: A meter main unit (11) and a dual-axis digital display inclinometer (12) are fixedly mounted on one side of the inner cavity of the frame (1), and a measuring instrument (4) is fixedly mounted on the inner wall of the frame (1).

8. A method for using an anchor drill rod angle control device, characterized in that: The device for controlling the angle of an anchor drill rod according to any one of claims 1 to 7 is used, comprising the following steps: S1, anchor rod positioning and depth measurement mechanism, the roller (24) is vertical and closely fitted to the anchor rod axis, and as the anchor rod advances, the roller (24) rotates accordingly, and the counter (21) records the number of rotations in real time. The meter host (11) can accurately calculate the drilling depth of the anchor rod based on the number of rotations, and perform real-time display and data storage; S2, angle control and insertion direction limiting structure, using the sleeve (3) to constrain the insertion direction of the anchor rod, and by adjusting the installation angle of the sleeve (3), the initial control of the anchor rod insertion angle is achieved; S3, the limiting wheel (57) adjusts the driving mechanism, the second driving motor (58) drives the screw rod (59) to rotate, pushing the movable block (52) to move along the screw rod (59), the movable block (52) drives the protrusion (541) connected thereto to move synchronously, and then drives the first rotating ring (54) to rotate, and drives the second rotating ring (56) to rotate synchronously through the fixed rod (561); S4. Principle of resistivity detection and anchoring quality assessment. After the anchor rod is inserted and reaches the preset depth, the resistivity of the anchoring section can be detected using a measuring instrument (4); S5. Ultrasonic detection mechanism and defect identification, by applying ultrasonic signals to analyze the propagation characteristics of the anchoring section.

9. The method for using the anchor drill rod angle control device according to claim 8, characterized in that: In step 2, when the first rotating ring (54) and the second rotating ring (56) rotate synchronously, the movable sleeve (55) is driven to rotate and slide along the driving rod (53), and finally the driving rod (53) is rotated with the support block (531) as the center; in step 4, if the anchoring agent is in close contact with the interface between the anchor rod and the surrounding rock, the measured resistivity value is stable and meets the design requirements; in step 5, when the anchoring agent is in close contact with the interface between the surrounding rock, the ultrasonic propagation path is continuous, the energy attenuation is small, the sound speed is fast, and the echo signal is clear and the waveform is regular.

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