Multi-stage energy-absorbing anti-impact anchor rod
By using a multi-stage energy-absorbing and anti-impact anchor structure, the friction between the connecting pipe and the expansion pipe, as well as the mechanical engagement of the claws and plates, has solved the problem of loosening and breakage of existing anchors under complex surrounding rock conditions, thus improving stability and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING MINING & ENERGY ENVIRONMENTAL TECHNOLOGY DEVELOPMENT CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-04-17
AI Technical Summary
Existing anti-scour anchors have relatively few anchoring points and concentrated stress when the surrounding rock is deformed or unevenly slipped. This can easily lead to loosening, slippage, or breakage, making it impossible to provide continuous and stable support and posing safety hazards.
The structure employs a multi-stage energy-absorbing and anti-impact anchor bolt, which uses a connecting pipe to drive the screw to move. The expansion of the pipe enhances the anchoring effect, and the mechanical engagement of the claws and the plate extends the length of the anchor bolt, thereby improving anchoring stability and energy absorption capacity.
It improves the stability and service life of anchor bolts, solves the problem of anchorage failure, enhances the impact resistance of the support system, and ensures project safety.
Smart Images
Figure CN224134676U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anti-impact anchor technology, and in particular to a multi-stage energy-absorbing anti-impact anchor. Background Technology
[0002] In scenarios such as deep mineral resource mining and underground engineering construction, the surrounding rock of tunnels is significantly affected by rockbursts, which places stringent requirements on the impact resistance and failure prevention capabilities of the support system. A multi-stage energy-absorbing anti-rockburst anchor has emerged to address this issue, aiming to improve the reliability of support under complex working conditions by optimizing the structure and mechanical transmission path.
[0003] In existing technologies, conventional anti-impact anchor bolts mostly adopt the form of a single screw combined with a simple anchoring structure. They rely on the direct contact between the screw and the anchoring agent and the hole wall to transfer the load, utilize the strength of the screw itself to resist the impact, and consume energy through the elastic and plastic deformation of the screw under tension. They attempt to achieve the functions of support and energy absorption through simple mechanical transmission.
[0004] However, existing technologies have obvious drawbacks: when relying solely on screws for fixing, there are relatively few anchoring points and the stress is concentrated. When the surrounding rock is complex and there is uneven slippage, the local stress on the screws can easily exceed their bearing capacity, leading to loosening, slippage, or even breakage. Ultimately, this results in anchoring failure, which cannot provide continuous and stable support for the roadway, seriously threatening engineering safety and the lives of workers. Therefore, a multi-stage energy-absorbing and anti-scour anchor is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a multi-stage energy-absorbing anti-impact anchor bolt, which aims to improve the existing technology that relies solely on screw fixing, has relatively few anchoring points and concentrated stress. If the surrounding rock deformation is complex and there is uneven slippage, the screw is prone to loosening, slippage or even breakage due to excessive local stress, leading to anchoring failure.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A multi-stage energy-absorbing and anti-impact anchor bolt includes a rod body, a connecting pipe slidably connected to the inner wall of the rod body, a blocking component provided on the outer wall of the connecting pipe, a tray fixedly connected to one end of the rod body, a locking nut rotatably connected to the side wall of the tray, the locking nut being internally threaded to the outer wall of the connecting pipe, an anchoring end fixedly connected to one end of the connecting pipe, a screw fixedly connected to one end of the anchoring end, and a reinforcing component fixedly connected to one end of the screw.
[0008] The reinforcement component includes an extrusion tube, which is internally threaded to the outer wall of the screw. An expansion tube is slidably connected to the outer wall of the screw, and an expansion sleeve is slidably connected to the outer wall of the expansion tube. A plastic connecting ring is provided on the outer wall of the expansion sleeve, and the inner wall of the expansion sleeve is slidably connected to the outer wall of the screw.
[0009] As a further description of the above technical solution:
[0010] The blocking assembly includes a connecting block, the bottom of which is fixedly connected to the outer wall of the connecting pipe, and a baffle is rotatably connected to the inner wall of the connecting block. A spring is provided at the bottom of the baffle, one end of which is fixedly connected to the bottom of the baffle, and the other end of which is fixedly connected to the outer wall of the connecting pipe.
[0011] As a further description of the above technical solution:
[0012] One end of the connecting pipe is fixedly connected to a second connecting post, and the outer wall of the second connecting post is slidably connected to the inside of the rod.
[0013] As a further description of the above technical solution:
[0014] The second connecting post is slidably connected to the first connecting post at one end, and the other end of the first connecting post is fixedly connected to the other end of the connecting pipe.
[0015] As a further description of the above technical solution:
[0016] The outer wall of the second connecting column is fixedly connected to a first claw, and the side wall of the second connecting column is fixedly connected to a first clamping plate.
[0017] As a further description of the above technical solution:
[0018] A second claw is fixedly connected to the outer wall of the first connecting column, and a second block is fixedly connected to the side wall of the second claw.
[0019] As a further description of the above technical solution:
[0020] The inner wall of the first claw is slidably connected to the side wall of the second claw, and the side wall of the first claw is slidably connected to the side wall of the second claw.
[0021] As a further description of the above technical solution:
[0022] The inner wall of the second claw is slidably connected to the side wall of the first card plate, and the side wall of the second claw is slidably connected to the side wall of the first claw.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, the connecting pipe is pulled by force to move the screw, and then the screw will drive the extrusion tube on the outer wall to move. At the same time as the extrusion tube moves, it will drive the expansion tube on the outer wall to spread, so that the expansion tube can fit into the hole. This solves the problem that if the screw is fixed alone, there are relatively few anchoring points and the force is concentrated. If the surrounding rock is deformed and there is uneven slippage, the screw is prone to loosening, stripping or even breaking due to excessive local stress, which leads to anchoring failure. This improves the stability of the anti-impact anchor.
[0025] 2. In this utility model, by clamping the inner wall of the second claw onto the side wall of the first clamping plate, the inner wall of the first claw is also clamped onto the side wall of the second clamping block, thereby increasing the length of the anchor rod. This solves the problem that the anchor rod cannot buffer energy and adapt to deformation through elongation, and is prone to breakage and failure due to insufficient deformation space, causing the rod body to bear excessive stress and thus failing to effectively absorb energy and prevent impact. This improves the service life of the anti-impact anchor rod. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of a multi-stage energy-absorbing and anti-impact anchor bolt proposed in this utility model;
[0027] Figure 2 This is a schematic diagram of the outer wall structure of a multi-stage energy-absorbing and anti-impact anchor rod proposed in this utility model;
[0028] Figure 3 This is a schematic diagram of the outer wall structure of the anchoring end of a multi-stage energy-absorbing and anti-impact anchor rod proposed in this utility model.
[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0030] Figure 5 This is a schematic diagram of the cross-sectional structure of a multi-stage energy-absorbing and anti-impact anchor rod proposed in this utility model.
[0031] Legend:
[0032] 1. Tray; 2. Locking nut; 3. Rod body; 4. Anchor end; 5. Expansion sleeve; 6. Extrusion tube; 7. Screw; 8. Plastic connecting ring; 9. Expansion tube; 10. Connecting block; 11. Baffle; 12. Spring; 13. Connecting tube; 14. First claw; 15. First clamping plate; 16. First connecting post; 17. Second claw; 18. Second clamping block; 19. Second connecting post. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] Reference Figures 1-4 An embodiment of this utility model is provided: a multi-stage energy-absorbing and anti-impact anchor rod, including a rod body 3, a connecting pipe 13 slidably connected to the inner wall of the rod body 3, a blocking component provided on the outer wall of the connecting pipe 13, a tray 1 fixedly connected to one end of the rod body 3, a locking nut 2 rotatably connected to the side wall of the tray 1, the locking nut 2 being internally threaded to the outer wall of the connecting pipe 13, an anchoring end 4 fixedly connected to one end of the connecting pipe 13, a screw 7 fixedly connected to one end of the anchoring end 4, and a reinforcing component fixedly connected to one end of the screw 7.
[0035] The reinforcement assembly includes a compression tube 6, which is internally threaded to the outer wall of the screw rod 7. An expansion tube 9, made of metal, is slidably connected to the outer wall of the screw rod 7. When pushed by the compression tube 6, the expansion tube 9 expands outwards towards the expansion sleeve 5, enhancing the anchoring effect and improving the stability of the anchor rod through friction and mechanical engagement with the bore wall. An expansion sleeve 5 is slidably connected to the outer wall of the expansion tube 9. A plastic connecting ring 8 is provided on the outer wall of the expansion sleeve 5, and its inner wall is slidably connected to the outer wall of the screw rod 7. The blocking assembly includes a connecting block 10, the bottom of which is fixedly connected to the connecting tube 13. The outer wall and the inner wall of the connecting block 10 are rotatably connected to a baffle 11. When the connecting block 10 and the baffle 11 are impacted and axially displaced, the elastic force of the spring 12 is used to contact the inner wall of the hole, which increases the resistance after grouting and further improves the stability of the anchor. A spring 12 is provided at the bottom of the baffle 11. One end of the spring 12 is fixed to the bottom of the baffle 11 and the other end is fixed to the outer wall of the connecting pipe 13, providing elastic support for the baffle 11 and ensuring that it can effectively abut against the hole wall under impact load. One end of the spring 12 is fixedly connected to the bottom of the baffle 11 and the other end of the spring 12 is fixedly connected to the outer wall of the connecting pipe 13.
[0036] Reference Figure 1 and Figure 5One end of the connecting tube 13 is fixedly connected to a second connecting post 19. The outer wall of the second connecting post 19 is slidably connected to the inside of the rod body 3. One end of the second connecting post 19 is slidably connected to a first connecting post 16. One end of the first connecting post 16 is fixed to the connecting tube 13, and the other end is slidably inserted into the second connecting post 19. When the connecting tube 13 is rotated, the first connecting post 16 drives the second claw 17 on its outer wall to rotate, so that the inner wall of the second claw 17 engages with the side wall of the first locking plate 15 of the second connecting post 19. At the same time, the inner wall of the first claw 14 engages with the side wall of the second locking block 18. Through the mechanical engagement of the claws with the locking plate and the locking block, the length of the connecting tube 13 and the rod body 3 is extended. To meet the anchor length requirements under different working conditions, the other end of the first connecting column 16 is fixedly connected to the other end of the connecting pipe 13. The outer wall of the second connecting column 19 is fixedly connected to the first claw 14, and the side wall of the second connecting column 19 is fixedly connected to the first clamping plate 15. The outer wall of the first connecting column 16 is fixedly connected to the second claw 17, and the side wall of the second claw 17 is fixedly connected to the second clamping block 18. The inner wall of the first claw 14 is slidably connected to the side wall of the second clamping block 18, the side wall of the first claw 14 is slidably connected to the side wall of the second claw 17, the inner wall of the second claw 17 is slidably connected to the side wall of the first clamping plate 15, and the side wall of the second claw 17 is slidably connected to the side wall of the first claw 14.
[0037] Working principle: During the initial installation of the anchor bolt, the connecting pipe 13, which is slidably connected to the inner wall, is first subjected to force. The force on the connecting pipe 13 pulls the screw 7, which is fixedly connected at one end, to move. During the movement of the screw 7, the extrusion pipe 6, which is threadedly connected to the outer wall, moves accordingly. When the extrusion pipe 6 moves, it pushes the expansion pipe 9, which is slidably connected to the outer wall, to spread outwards towards the expansion sleeve 5. Since the expansion sleeve 5 is locked in the anchor bolt borehole with the assistance of the plastic connecting ring 8, the plastic connecting ring 8 will break. Subsequently, the expansion pipe 9 will spread out and fit tightly against the inner wall of the hole. The friction and mechanical interlocking force between the expansion pipe 9 and the hole wall will enhance the anchoring effect between the anchor bolt and the surrounding rock, thereby increasing the stability of the anchor bolt.
[0038] At the same time, the connecting block 10 moves. When the connecting block 10 is axially displaced due to impact, the baffle 11 can contact the inner wall of the hole under the elastic force of the spring 12. By utilizing the area of the baffle 11, the resistance after grouting is increased, thereby further improving the stability.
[0039] Then, when adding length, firstly, the first connecting post 16 at one end of the connecting pipe 13 is moved, and then one end of the first connecting post 16 is attached to one end of the second connecting post 19. Then, the connecting pipe 13 is rotated to drive the first connecting post 16 to rotate, and then the second claw 17 on the outer wall is driven to rotate together. Next, during the rotation of the second claw 17, its inner wall will be engaged with the side wall of the first card plate 15, and at the same time, the inner wall of the first claw 14 will be engaged with the side wall of the second card block 18, thereby increasing the length of the anchor rod.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A multi-stage energy-absorbing impact-protecting anchor rod comprising a rod body (3), characterized in that: The inner wall of the rod (3) is slidably connected to a connecting pipe (13), and the outer wall of the connecting pipe (13) is provided with a blocking component. One end of the rod (3) is fixedly connected to a tray (1), and the side wall of the tray (1) is rotatably connected to a locking nut (2). The locking nut (2) is internally threaded to the outer wall of the connecting pipe (13). One end of the connecting pipe (13) is fixedly connected to an anchor end (4), and one end of the anchor end (4) is fixedly connected to a screw (7). One end of the screw (7) is fixedly connected to a reinforcing component. The reinforcement component includes an extrusion tube (6), which is internally threaded to the outer wall of a screw (7). An expansion tube (9) is slidably connected to the outer wall of the screw (7). An expansion sleeve (5) is slidably connected to the outer wall of the expansion tube (9). A plastic connecting ring (8) is provided on the outer wall of the expansion sleeve (5). The inner wall of the expansion sleeve (5) is slidably connected to the outer wall of the screw (7).
2. A multi-stage energy-absorbing impact-protective anchor rod according to claim 1, characterized in that: The blocking assembly includes a connecting block (10), the bottom of which is fixedly connected to the outer wall of the connecting pipe (13), and a baffle (11) is rotatably connected to the inner wall of the connecting block (10). A spring (12) is provided at the bottom of the baffle (11), one end of which is fixedly connected to the bottom of the baffle (11), and the other end of which is fixedly connected to the outer wall of the connecting pipe (13).
3. A multi-stage energy-absorbing impact-protective anchor rod according to claim 2, characterized in that: One end of the connecting pipe (13) is fixedly connected to a second connecting column (19), and the outer wall of the second connecting column (19) is slidably connected to the inside of the rod body (3).
4. A multi-stage energy-absorbing and anti-impact anchor bolt according to claim 3, characterized in that: The second connecting post (19) is slidably connected to the first connecting post (16) at one end, and the other end of the first connecting post (16) is fixedly connected to the other end of the connecting pipe (13).
5. A multi-stage energy-absorbing shock-absorbing anchor rod according to claim 4, characterized in that: The outer wall of the second connecting column (19) is fixedly connected to the first claw (14), and the side wall of the second connecting column (19) is fixedly connected to the first clamping plate (15).
6. A multi-stage energy-absorbing shock absorbing anchor rod according to claim 5, characterized in that: The outer wall of the first connecting column (16) is fixedly connected to a second claw (17), and the side wall of the second claw (17) is fixedly connected to a second block (18).
7. A multi-stage energy-absorbing shock-absorbing anchor rod according to claim 6, characterized in that: The inner wall of the first claw (14) is slidably connected to the side wall of the second claw (18), and the side wall of the first claw (14) is slidably connected to the side wall of the second claw (17).
8. A multi-stage energy-absorbing shock-absorbing anchor rod according to claim 7, characterized in that: The inner wall of the second claw (17) is slidably connected to the side wall of the first card plate (15), and the side wall of the second claw (17) is slidably connected to the side wall of the first claw (14).