A slope protection anchoring device

Abstract

This invention provides a slope protection anchoring device, relating to the field of slope protection technology. It includes a drill frame with a drive motor slidably mounted on it. An anchor clamp is mounted on the output end of the drive motor. The device also includes grouting anchors, a connecting sleeve, and a drill bit. The grouting anchor has external threads on its outer wall. One end of the grouting anchor has a connecting joint with multiple locking grooves. The area between adjacent locking grooves forms a pushing part, which has locking holes. One end of the connecting sleeve has a first internal thread groove on its inner wall, and the other end has multiple locking blocks on its inner wall. Each locking block has a locking pin on one side. The drill bit is installed at the end of the first drilled grouting anchor away from the connecting joint. This invention only requires axially inserting two grouting anchors to complete the initial connection. Subsequently, only the drive motor needs to perform normal construction propulsion and rotation to automatically lock the two grouting anchors axially, significantly shortening the operation time for high-altitude anchor connection on steep slopes.

Description

Technical Field

[0001] This invention relates to the field of slope protection technology, and specifically to a slope protection anchoring device. Background Technology

[0002] In projects such as open-pit mines, road cuts, water conservancy slopes, and foundation pit support, anchoring technology is the core means of active reinforcement of high and steep slopes. Among them, self-drilling hollow grouting anchors combine the functions of drill rod, load-bearing component, and grouting channel, completing drilling and wall protection simultaneously. This effectively solves the problem of easy hole collapse in fractured and weathered rock layers and loose deposits, and is widely used in various slope protection projects.

[0003] Due to limitations in land transportation, drilling rig operating space, and slope operation conditions, the finished length of a single self-drilling grouting anchor bolt is typically 2–6 meters. However, in actual engineering projects, to penetrate shallow slip surfaces and anchor into deep, stable rock masses, the designed depth of the anchoring hole often reaches tens of meters, far exceeding the factory length of a single anchor bolt. Therefore, deep-hole anchoring construction must involve connecting the anchor bolts section by section, and lengthening is an essential step in the construction of deep-hole self-drilling anchor bolts.

[0004] Currently, the industry standard for connection is a fully threaded sleeve connection, which uses a hollow internal threaded sleeve to screw the external threads at the ends of the two anchor rods. The threaded pair simultaneously transmits axial thrust and rotational torque, thus opening the internal grouting channel. However, this connection operation is cumbersome, requiring multiple turns of continuous screwing to achieve the predetermined engagement depth. Alignment and screwing in the narrow space of the slope is time-consuming, resulting in low construction efficiency. Workers repeatedly screw the rods on the sloping slope, which is physically demanding and carries a high risk of falling.

[0005] In summary, existing self-drilling anchor bolt docking structures are cumbersome to operate and inconvenient for slope construction, making it difficult to meet the construction requirements of efficient and safe deep hole anchoring on steep slopes. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention proposes a slope protection anchoring device to solve the problems of cumbersome operation and inconvenient slope construction associated with existing self-advancing anchor bolt docking structures.

[0007] The objective of this invention is achieved through the following technical solution: The present invention provides a slope protection anchoring device, including a drill frame, which is installed on a construction trolley and a drive motor is slidably installed on it. An anchor clamp is installed at the output end of the drive motor. The device also includes a grouting anchor, a connecting sleeve and a drill bit. The grouting anchor has an internal grouting hole and an external thread on its outer wall. One end of the grouting anchor is provided with a butt joint. The end of the butt joint away from the grouting anchor is circumferentially provided with multiple axially extending snap-fit ​​grooves. The area between two adjacent snap-fit ​​grooves of the butt joint forms a pushing part. Each of the pushing parts is provided with a snap-fit ​​hole tangentially oriented along the same circumference. The inner wall of one end of the docking cylinder is provided with a first internal thread groove, and the inner wall of the other end is provided with a plurality of axially extending snap-fit ​​blocks. Each snap-fit ​​block is provided with a snap-fit ​​pin that matches the snap-fit ​​hole on one side along the same circumferential tangential direction. The drill bit is installed at the end of the first drilled grouting anchor rod furthest from the joint.

[0008] Furthermore, a sealing plug is installed inside the docking cylinder between the first internal thread groove and the snap-fit ​​block, and sealing rings are installed at both ends of the sealing plug.

[0009] Furthermore, the sealing plug has a first annular groove at both ends, and the sealing ring can be axially slidably accommodated in the first annular groove. The grouting anchor has a second annular groove at both ends that is adapted to the first annular groove. An air passage is connected between the two first annular grooves. An air inflation structure is installed inside the docking cylinder, which can inflate the air passage.

[0010] Furthermore, the inflation structure includes an air chamber and a piston block. The air chamber is opened inside the snap-fit ​​block and passes through the snap-fit ​​pin on one side of the snap-fit ​​block. The snap-fit ​​pin is fixed to the inner end of the air chamber and the distal end extends into the outside of the air chamber. The piston block is slidably installed in the air chamber, and the piston block has a through hole for the snap-fit ​​pin to pass through. A ventilation pipe connects the air passage and the air chamber.

[0011] Furthermore, an elastic element is connected between the piston block and the inner end of the air chamber to provide an elastic force that pushes the piston block out of the air chamber.

[0012] Furthermore, the sealing ring is made of rubber, and the sealing ring is interference-fitted with the first ring groove and the second ring groove.

[0013] Furthermore, the inner wall size of the snap-fit ​​hole near its inner end tends to decrease.

[0014] Furthermore, multiple support plates are installed around the outer side of the docking cylinder.

[0015] Furthermore, the drill bit is provided with a connecting cylinder at its tail end, the inner wall of the connecting cylinder is provided with a second internal thread groove, and the drill bit is provided with multiple slurry outlets that communicate with the inside of the connecting cylinder.

[0016] Furthermore, a support seat is installed on the drill frame, and a support groove is provided on the support seat. The support seat is connected to the drill frame through a telescopic cylinder so that the support seat can be raised or lowered relative to the drill frame.

[0017] As can be seen from the above technical solution, the present invention provides a slope protection anchoring device: 1. During deep hole anchoring construction, the drive motor first drills the first grouting anchor rod to the predetermined depth. Then, the connection between the anchor rod clamp and the first grouting anchor rod is released, and the drive motor is returned to the starting position. The next grouting anchor rod is placed on the drill frame, and the anchor rod clamp is used to hold and fix its end. A connecting sleeve is screwed onto the far end of the next grouting anchor rod, and the locking blocks of the connecting sleeve are axially aligned with the locking slots of the previous grouting anchor rod. The next grouting anchor rod is pushed axially, allowing the locking blocks to slide into the corresponding locking slots, until both anchor rod sections are connected. The mating ends fit together, the drive motor pushes axially and drives the next grouting anchor rod to rotate along the drilling working direction, and the locking pin is then inserted into the corresponding locking hole, automatically completing the docking and locking of the two anchor rods. Only the two grouting anchor rods need to be axially inserted to complete the initial docking. Then, only the drive motor needs to be pushed and rotated normally during construction to automatically complete the axial locking of the two grouting anchor rods. There is no need for multiple turns of continuous screwing, which greatly shortens the operation time of high-altitude anchor rod connection on steep slopes and reduces the working time and fall risk of workers at height. 2. After the anchor bolts are in place, the inflation structure fills the air passage with gas. The air pressure acts on the inner end face of the sealing ring, pushing the sealing ring to slide outward along the first ring groove. Part of the sealing ring is embedded in the second ring groove of the grouting anchor bolt end face, forming a double sealing structure with end face pressing and ring groove fitting. It has stronger anti-vibration and anti-movement sealing capabilities. Even if the anchor bolts have slight axial movement during drilling, the sealing ring will always be embedded in the second ring groove to maintain a sealed fit, effectively avoiding sealing failure and grout leakage caused by impact vibration. It is suitable for the complex working conditions of deep hole impact drilling. 3. During the docking process of two grouting anchor rods, the docking cylinder is axially inserted into the joint of the grouting anchor rod. As the drive motor drives the latter grouting anchor rod to rotate along the working direction of drilling, the end face of the push part first contacts the outer end face of the piston block. The piston block is pushed by the push part and slides along the locking pin towards the inner end of the air chamber. The volume of the sealed chamber inside the air chamber decreases, the air inside the chamber is compressed, and flows into the air passage through the ventilation pipe. The rotational thrust during the drilling process automatically triggers the air filling seal and automatically completes the action of filling the air passage with air. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the construction state of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a cross-sectional view of the three-dimensional structural schematic diagram of the docking cylinder in this invention; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a three-dimensional structural diagram of the grouting anchor bolt in this invention; Figure 6 This is a three-dimensional structural diagram of the drill bit in this invention; Figure label: Drill frame 1, drive motor 11, anchor bolt clamp 12, support seat 13, support groove 131, telescopic cylinder 14; Grouting anchor 2, grouting hole 21, external thread 22, butt joint 23, snap groove 231, push part 232, snap hole 233, second ring groove 24; Connecting cylinder 3, first internal thread groove 31, snap-fit ​​block 32, snap-fit ​​pin 33, sealing plug 34, sealing ring 341, first ring groove 342, air passage 343, inflation structure 35, air chamber 351, piston block 352, perforation 353, ventilation pipe 354, elastic element 355, support plate 36. Drill bit 4, connecting sleeve 41, second internal thread groove 42, slurry outlet 43. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] like Figure 1-6 As shown, this embodiment provides a slope protection anchoring device, including a drill frame 1. The drill frame 1, acting as a propulsion beam, is hinged to the rotary platform of a construction trolley via a drill arm. The pitch and azimuth angles can be adjusted via the drill arm to adapt to drilling requirements at different slope angles. A linear guide rail is laid on the working face of the drill frame 1. A drive motor 11 is slidably mounted on the guide rail via a slide block and is driven by a propulsion cylinder to reciprocate along the axial direction of the drill frame 1. The drive motor 11 is a low-speed, high-torque hydraulic motor, suitable for the impact and sudden load changes during rock drilling. An anchor clamp 12 is installed at the output end of the drive motor 11. The anchor clamp 12 is a mechanical or hydraulic multi-jaw chuck structure used to clamp the end of the grouting anchor 2, transmitting rotational torque and axial propulsion force. Preferably, the output shaft end of the drive motor has a hollow structure, accommodating both rotational torque transmission and grouting medium passage.

[0022] Preferably, a support seat 13 is installed in the front section of the drill frame 1. The support seat 13 has a support groove 131, in which a wear-resistant liner can be embedded. The support seat 13 is connected to the drill frame 1 by a telescopic cylinder 14. The telescopic cylinder 14 is a small hydraulic cylinder. The cylinder body is hinged to the side support of the drill frame 1, and the piston rod end is hinged to the bottom of the support seat 13. The support seat 13 can be raised or lowered relative to the drill frame 1. When the telescopic cylinder 14 extends, the support seat 13 is raised to the axial height of the drill frame 1. When it retracts, the support seat 13 is lowered below the drill frame to avoid the drilling path.

[0023] The slope protection anchoring device provided in this embodiment also includes a grouting anchor rod 2, a connecting cylinder 3, and a drill bit 4.

[0024] The grouting anchor rod 2 has grouting holes 21 inside as a flow channel for grouting slurry. The outer wall of the grouting anchor rod 2 has external threads 22, which serves to increase the bonding area of ​​the anchoring mortar and adapt to the threaded connection. One end of the grouting anchor rod 2 is provided with a butt joint 23. The butt joint 23 has a hollow structure. The end of the butt joint 23 away from the grouting anchor rod 2 has multiple axially extending snap grooves 231 circumferentially arranged. The solid area between two adjacent snap grooves 231 of the butt joint 23 forms a pushing part 232. Each pushing part 232 has a snap hole 233 tangentially oriented along the same circumference.

[0025] Preferably, the number and shape of the claws of the anchor bolt clamp 12 are matched with the number and shape of the locking groove 231. When clamping, the claws of the anchor bolt clamp 12 are engaged in the locking groove 231 to achieve interlocking clamping, improve torque transmission efficiency, and avoid slippage.

[0026] The connecting cylinder 3 has a hollow structure. One end of the inner wall of the connecting cylinder 3 has a first internal thread groove 31 that matches the external thread 22. The other end of the inner wall has multiple axially extending snap-fit ​​blocks 32. Each snap-fit ​​block 32 has a snap-fit ​​pin 33 that matches the snap-fit ​​hole 233 on one side tangentially along the same circumference. The cross-sectional width of the snap-fit ​​block 32 is smaller than the gap width of the snap-fit ​​groove 231 to ensure smooth axial insertion and prevent the snap-fit ​​pin 33 from colliding with the pushing part 232 during insertion. It should be noted that when the first internal thread groove 31 of the docking cylinder 3 is screwed and tightened with the external thread 22 of the grouting anchor rod 2, each locking block 32 can axially correspond to each locking groove 231 on the grouting anchor rod 2 it docks with. This allows the anchor rod clamp 12 to switch between holding the grouting anchor rod 2 without rotating the drive motor 11. The locking blocks 32 of the docking cylinder 3 on the next grouting anchor rod 2 can be directly axially aligned with the locking grooves 231 of the previous grouting anchor rod 2, eliminating the need for calibration steps.

[0027] Preferably, multiple locking holes 233 are provided on the pushing part 232, and multiple locking pins 33 are provided on the locking block 32 to share the axial pushing and pulling force.

[0028] Preferably, the inner wall size of the locking hole 233 near its inner end tends to decrease. As the locking pin 33 extends into the locking hole 233, the squeezing friction between the locking pin 33 and the locking hole 233 gradually increases, forming a wedge-tight self-locking mechanism. As the drive motor 11 drives the grouting anchor rod 2 to continuously rotate, the engagement between the locking pin 33 and the locking hole 233 becomes tighter and tighter, effectively preventing the problem of loosening due to vibration and reverse impact during drilling, and significantly improving the vibration resistance and axial locking stability of the docking structure.

[0029] Preferably, multiple support plates 36 are installed around the outer side of the docking cylinder 3. During the drilling process of the anchor rod, the docking cylinder 3 enters the borehole along with the rod body. The outer ends of the support plates 36 abut against the borehole wall, forming multi-point radial support for the docking cylinder 3, limiting the radial sway and wobbling of the rod body, and keeping the grouting anchor rod 2 body aligned and centered.

[0030] The drill bit 4 is installed at the end of the first drilled grouting anchor 2 away from the joint 23, and directly contacts the rock mass as a drilling cutting component. Specifically, the tail end of the drill bit 4 is provided with a connecting sleeve 41, the inner wall of the connecting sleeve 41 is provided with a second internal thread groove 42 adapted to the external thread 22, and the drill bit 4 is provided with multiple grout outlets 43 that communicate with the inside of the connecting sleeve 41.

[0031] During deep hole anchoring construction, the drive motor 11 first drills the first grouting anchor rod 2 to the predetermined depth, then disconnects the anchor rod clamp 12 from the first grouting anchor rod 2, and retracts the drive motor 11 to the starting position; the next grouting anchor rod 2 is placed on the drill frame 1 and the anchor rod clamp 12 is clamped and fixed to its end, and the connecting sleeve 3 is screwed onto the far end of the next grouting anchor rod 2, and the locking blocks 32 of the connecting sleeve 3 are axially aligned with the locking slots 231 of the previous grouting anchor rod 2, and the next grouting anchor rod 2 is pushed axially, so that the locking blocks 32 slide into the corresponding locking slots 231 until the docking end faces of the two anchor rods fit together; the drive motor 11 advances axially and drives the next grouting anchor rod 2 to rotate along the working direction of drilling, and the locking pin 33 is then embedded into the corresponding locking hole 233, automatically completing the docking and locking of the two anchor rods.

[0032] This invention only requires axially inserting two grouting anchor rods 2 to complete the initial connection. Then, simply drive the motor 11 to advance and rotate during normal construction to automatically lock the two grouting anchor rods 2 axially. This eliminates the need for multiple turns of continuous threading, significantly shortening the operation time for connecting anchor rods at height on steep slopes and reducing the time workers spend working at height and the risk of falling.

[0033] In one embodiment, a sealing plug 34 is installed inside the connecting sleeve 3 between the first internal thread groove 31 and the snap-fit ​​block 32. The sealing plug 34 has a through hole in its center to ensure that the grouting passages at both ends are unobstructed. Sealing rings 341 are installed at both ends of the sealing plug 34. When the connecting sleeve 3 is screwed and tightened with the next grouting anchor rod 2, one of the sealing rings 341 will statically seal the end face of the next grouting anchor rod 2. When the connecting sleeve 3 is inserted with the previous grouting anchor rod 2, the other sealing ring 341 will statically seal the end face of the previous grouting anchor rod 2. This ensures the sealing of the joint during high-pressure grouting operations, prevents insufficient grouting pressure and incomplete grouting in the anchoring section caused by grout leakage, and improves the quality of anchoring construction.

[0034] Furthermore, the sealing plug 34 has a first annular groove 342 at both ends, and the sealing ring 341 can be axially slidably accommodated in the first annular groove 342. The grouting anchor rod 2 has a second annular groove 24 at both ends that is adapted to the first annular groove 342. The groove depth of the second annular groove 24 is less than the cross-sectional height of the sealing ring 341. An air passage 343 is connected between the two first annular grooves 342. An air inflation structure 35 is installed inside the docking cylinder 3, which can inflate the air passage 343. After the anchor bolts are in place, the inflation structure 35 fills the air passage 343 with gas. The air pressure acts on the inner end face of the sealing ring 341, pushing the sealing ring 341 to slide outward along the first annular groove 342. Part of the sealing ring 341 is embedded in the second annular groove 24 on the end face of the grouting anchor bolt 2, forming a double sealing structure with end face pressing and annular groove fitting. This structure has stronger anti-vibration and anti-movement sealing capabilities. Even if the anchor bolts experience slight axial movement during drilling, the sealing ring 341 will always be fitted in the second annular groove 24 to maintain a sealed fit, effectively avoiding sealing failure and grout leakage caused by impact vibration. This structure is suitable for the complex working conditions of deep hole impact drilling.

[0035] Specifically, the inflation structure 35 includes an air chamber 351 and a piston block 352. The air chamber 351 is located inside the snap-fit ​​block 32 and passes through the snap-fit ​​pin 33 on the side of the snap-fit ​​block 32 facing the snap-fit ​​pin 33. The snap-fit ​​pin 33 is fixed to the inner end of the air chamber 351 and its distal end extends into the outside of the air chamber 351. The piston block 352 is slidably installed in the air chamber 351. In its initial state, the piston block 352 protrudes from the end face of the snap-fit ​​block 32, and the overall cross-sectional width of the piston block 352 and the snap-fit ​​block 32 is smaller than the gap width of the snap-fit ​​groove 231. The piston block 352 has a through hole 353 for the snap-fit ​​pin 33 to pass through. A sealing ring is provided on the inner ring of the through hole 353. An air passage 354 connects the air passage 343 and the air chamber 351. During the docking process of the two grouting anchor rods 2, the docking cylinder 3 is axially inserted into the joint 23 of the grouting anchor rod 2. As the drive motor 11 drives the next grouting anchor rod 2 to rotate along the working direction of drilling, the end face of the push part 232 first contacts the outer end face of the piston block 352. The piston block 352 is pushed by the push part 232 and slides along the locking pin 33 towards the inner end of the air chamber 351. The volume of the sealed chamber inside the air chamber 351 decreases, the air inside the chamber is compressed, and flows into the air passage 343 through the air pipe 354. The air filling seal is automatically triggered by the rotational thrust during the drilling process, and the air filling action is automatically completed.

[0036] Preferably, an elastic element 355 is connected between the piston block 352 and the inner end of the air chamber 351. The elastic element 355 may be a spring to provide an elastic force to push the piston block 352 out of the air chamber 351, so as to prevent the piston block 352 from being pressed into the air chamber 351 in advance when the docking cylinder 3 is in the un-docked state.

[0037] Preferably, the sealing ring 341 is made of rubber, and the sealing ring 341 is interference-fitted with the first ring groove 342 and the second ring groove 24 to ensure the sealing performance between the sealing ring 341 and the first ring groove 342 and the second ring groove 24. This can prevent gas in the air passage 343 from leaking from the side wall of the first ring groove 342 and effectively block the leakage of high-pressure cement slurry.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A slope protection anchoring device, comprising a drill frame, the drill frame being mounted on a construction trolley, a drive motor being slidably mounted on the drill frame, and an anchor clamp being mounted on the output end of the drive motor, characterized in that... It also includes grouting anchor bolts, connecting sleeves, and drill bits; The grouting anchor has an internal grouting hole and an external thread on its outer wall. One end of the grouting anchor is provided with a butt joint. The end of the butt joint away from the grouting anchor is circumferentially provided with multiple axially extending snap-fit ​​grooves. The area between two adjacent snap-fit ​​grooves of the butt joint forms a pushing part. Each of the pushing parts is provided with a snap-fit ​​hole tangentially oriented along the same circumference. The inner wall of one end of the docking cylinder is provided with a first internal thread groove, and the inner wall of the other end is provided with a plurality of axially extending snap-fit ​​blocks. Each snap-fit ​​block is provided with a snap-fit ​​pin that matches the snap-fit ​​hole on one side along the same circumferential tangential direction. The drill bit is installed at the end of the first drilled grouting anchor rod furthest from the joint.

2. The slope protection anchoring device according to claim 1, characterized in that, A sealing plug is installed inside the docking cylinder between the first internal thread groove and the snap-fit ​​block, and sealing rings are installed at both ends of the sealing plug.

3. The slope protection anchoring device according to claim 2, characterized in that, The sealing plug has a first annular groove at both ends, and the sealing ring can be axially slidably accommodated in the first annular groove. The grouting anchor has a second annular groove at both ends that is adapted to the first annular groove. An air passage is connected between the two first annular grooves. An air inflation structure is installed inside the docking cylinder, which can inflate the air passage.

4. A slope protection anchoring device according to claim 3, characterized in that, The inflation structure includes an air chamber and a piston block. The air chamber is located inside the snap-fit ​​block and passes through the snap-fit ​​pin on one side of the snap-fit ​​block. The snap-fit ​​pin is fixed to the inner end of the air chamber and its distal end extends outside the air chamber. The piston block is slidably installed in the air chamber, and a through hole is provided on the piston block for the snap-fit ​​pin to pass through. A ventilation pipe connects the air passage and the air chamber.

5. A slope protection anchoring device according to claim 4, characterized in that, An elastic element is connected between the piston block and the inner end of the air chamber to provide an elastic force that pushes the piston block out of the air chamber.

6. A slope protection anchoring device according to claim 3, characterized in that, The sealing ring is made of rubber, and the sealing ring is interference-fitted with the first and second annular grooves.

7. A slope protection anchoring device according to claim 1, characterized in that, The inner wall size of the snap-fit ​​hole decreases as it approaches its inner end.

8. A slope protection anchoring device according to claim 1, characterized in that, Multiple support plates are installed around the outer side of the docking cylinder.

9. A slope protection anchoring device according to claim 1, characterized in that, The drill bit is provided with a connecting cylinder at its tail end, and the inner wall of the connecting cylinder is provided with a second internal thread groove. The drill bit is provided with multiple slurry outlets that communicate with the inside of the connecting cylinder.

10. A slope protection anchoring device according to claim 1, characterized in that, The drill frame is equipped with a support seat, which has a support groove. The support seat is connected to the drill frame by a telescopic cylinder so that the support seat can be raised or lowered relative to the drill frame.

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