Composite expansion feet-lock bolt
By adopting a composite expansion lock foot anchor design in the lock foot anchor, the expansion screw and U-shaped clamping snap structure improve the anchoring force in weak surrounding rocks, the difficulty of welding quality during the construction of the existing lock foot anchor is solved. The problem of insufficient guarantee and anchoring force achieves higher stability and convenience.
Patent Information
- Application Number
- CN202420791425.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-17
AI Technical Summary
Existing lock foot anchors require on-site welding during construction, which leads to difficult to ensure process time, welding quality, and safety risks, and insufficient anchoring force in weak surrounding rocks.
A composite expansion lock foot anchor rod is designed, adopting a structure with expansion screws and U-shaped clamping snaps. The stability of the anchor rod is improved by injecting implant glue into the drill hole and using expansion screws and expansion expansion sheets. And a barb is installed on the expansion screw to prevent the screw from moving, and a U-shaped clamping snap and steel gasket are combined to enhance friction.
It greatly improves the installation convenience and stability of locking anchors, reduces welding needs, enhances anchoring force, reduces safety hazards, and saves material and process time.
Smart Images
Figure CN222254023U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of locking foot anchor rods, in particular to a composite expansion locking foot anchor rod. Background Art
[0002] The construction technical guide also requires the construction of locking anchors as a prescribed process. The main construction steps of locking anchors are drilling holes with a drilling rig, then installing anchors, and connecting locking anchors with steel arch frames (grid steel frames). Locking anchors constructed in some weak surrounding rocks should generally also include grouting inside the anchors to improve the anchoring capacity of the anchors and the surrounding rock mass, so as to achieve the purpose of improving the anchoring force and increasing the overall stability of the surrounding rock.
[0003] In the prior art, Chinese patent publication number CN208778027U discloses a tunnel steel arch frame hook-type locking foot anchor, which is characterized in that: the components of the hook-type locking foot anchor are divided into two types, namely, short-section transverse reinforcement and locking foot anchor head hook; before installation, the short-section transverse reinforcement is welded on both sides of the bent arch frame near the surrounding rock in the steel bar processing shed outside the tunnel, and the hook-type anchor assembled in the tunnel is connected to the short-section transverse reinforcement. This time, based on the characteristics of conventional locking foot anchor construction, the hook-type locking foot anchor was redesigned and used, and the locking foot anchor point of the locking foot anchor was transferred from the side of the I-beam away from the surrounding rock to the side near the surrounding rock, which greatly improved the locking foot ability, and changed the on-site welding anchor in the tunnel to the centralized processing and prefabrication in the steel bar processing shed outside the tunnel, avoiding the generation of welding smoke from the welding operation in the tunnel. At the same time, the short-section transverse reinforcement is used as the guide point for drilling the locking foot anchor hole, which can accurately construct the locking foot anchor, save the raw materials of the anchor, save the process time, and achieve the purpose of increasing the benefits of the project.
[0004] In actual use, the existing locking foot anchor rods need to be welded on site, which takes up process time, and the cutting and welding quality is difficult to guarantee, which poses certain safety hazards, and therefore needs to be improved. Utility Model Content
[0005] The utility model aims to provide a composite expansion locking foot anchor rod, which has the advantages of convenient installation and good stability.
[0006] The above-mentioned technical purpose of the utility model is achieved through the following technical scheme: a composite expansion locking foot anchor rod, comprising a steel frame, an anchor rod A is arranged on one side of the steel frame, an anchor rod B is arranged on the other side of the steel frame, one end of each of the anchor rods A and B is provided with an expansion screw, the other end of each of the anchor rods A and B is provided with a threaded head, one end of each of the threaded heads is provided with a nut, one side of the nut is provided with a U-shaped clamping buckle, an expansion screw sleeve is arranged inside the expansion screw, one end of the expansion screw sleeve is provided with a conical plug, one end of the anchor rods A and B is provided with a conical plug, one end of the expansion screw sleeve is provided with four expansion expansion plates, and an air hole is provided in the middle of the expansion screw sleeve near the expansion expansion plate.
[0007] By adopting the above technical scheme, two holes are drilled on the wall or ground at the steel frame where the locking foot anchor rod needs to be installed with a drilling rig and the anchor glue is injected. The anchor rod A and the anchor rod B with expansion screws are inserted into the drilled holes and tamped with a hammer. Then, the threaded heads of the anchor rods A and B on both sides of the steel frame are clamped with U-shaped clamping buckles, and the U-shaped clamping buckles are then fixed tightly with nuts. While the nuts are fixing the U-shaped clamping buckles, the conical plug inside the expansion screw connecting the anchor rods A and B moves outward, so that the four expansion expansion sheets with air holes on the expansion screw casing expand outward, thereby making the anchor rod more firmly fixed in the drilled hole, which greatly improves the convenience and stability of the installation of the composite expansion locking foot anchor rod.
[0008] The utility model is further configured as follows: the outer surface of the expansion screw is provided with barbs, and the number of the barbs is 20.
[0009] By adopting the above technical solution, the 20 barbs on the expansion screw can prevent the expansion screw from moving out of the drill hole, thereby further increasing the stability of the composite expansion locking foot anchor rod.
[0010] The utility model is further configured as follows: a U-shaped clamp head A and a U-shaped clamp head B are arranged inside the U-shaped clamp buckle, both ends of the U-shaped clamp head A and the U-shaped clamp head B are arranged with a tightening screw head, and the tightening screw head is arranged with a tightening nut.
[0011] By adopting the above technical solution, the U-shaped clamp head A, U-shaped clamp head B, tension screw head and tension screw nut inside the U-shaped clamping buckle can quickly clamp the anchor rods on both sides of the steel frame, thereby further improving the convenience of installing the composite expansion locking foot anchor rod.
[0012] The utility model is further configured as follows: a gasket is provided on one side of the nut, and the gasket is made of steel.
[0013] By adopting the above technical solution, the gasket made of steel can increase the friction between the nut and the U-shaped clamping buckle when the nut is tightened, so that the composite expansion locking foot anchor rod can be installed more firmly.
[0014] The utility model is further configured as follows: the length of the expansion screw is 20 cm, and the length of the expansion expansion piece is 10 cm.
[0015] By adopting the above technical solution, an expansion screw with a length of 20 cm and an expansion expansion piece with a length of 10 cm can increase the stability of the expansion screw in the drilled hole, thereby further increasing the stability of the installation of the composite expansion locking foot anchor.
[0016] The utility model is further configured as follows: the length of the tightening screw head is 8 cm, and the shape of the tightening screw head is hexagonal.
[0017] By adopting the above technical solution, the hexagonal tightening screw head can facilitate tightening and loosening operations, and the 8cm long tightening screw head can adjust the tightness of the U-shaped clamp A and the U-shaped clamp B within a range of 8cm, thereby further improving the convenience of installation of the composite expansion locking foot anchor rod.
[0018] The beneficial effects of the utility model are:
[0019] 1. The utility model, through the arrangement among the steel frame, anchor rod A, anchor rod B, expansion screw, threaded head, nut, U-shaped clamping clip, expansion screw sleeve, conical plug, expansion expansion piece, and air hole, uses a drilling rig to drill two holes at the wall (ground) position of the steel frame where the locking foot anchor rod needs to be installed and injects anchor glue, inserts the anchor rod A and anchor rod B with the expansion screw into the drilled hole and tamps it with a hammer, then uses the U-shaped clamping clip to clamp the threaded heads of the anchor rod A and anchor rod B on both sides of the steel frame, and then uses the nut to fix the U-shaped clamping clip tightly, and while fixing the U-shaped clamping clip tightly, the nut drives the conical plug inside the expansion screw connected to the anchor rod A and the anchor rod B to move outward, so that the four expansion expansion pieces with air holes on the expansion screw sleeve expand outward, and then the anchor rod is fixed more firmly in the drilled hole, which greatly improves the convenience and stability of the installation of the composite expansion locking foot anchor rod.
[0020] 2. The utility model, through the arrangement of the gasket, barb, U-shaped clamp A, tension screw head, tension screw nut, and U-shaped clamp B, the 20 barbs on the expansion screw can prevent the expansion screw from moving out of the drill hole, thereby further increasing the stability of the composite expansion locking foot anchor rod. The U-shaped clamp A, U-shaped clamp B, tension screw head and tension screw nut inside the U-shaped clamping buckle can quickly clamp the anchor rods on both sides of the steel frame, thereby further improving the convenience of installing the composite expansion locking foot anchor rod. The gasket made of steel can increase the stability when the screw nut is tightened. Increase the friction between the nut and the U-shaped clamping buckle, so that the composite expansion locking foot anchor rod can be installed more stably. The expansion screw with a length of 20 cm and the expansion expansion piece with a length of 10 cm can increase the stability of the expansion screw in the drilled hole, thereby further increasing the stability of the installation of the composite expansion locking foot anchor rod. The hexagonal tightening screw head can facilitate the tightening operation. The 8 cm long tightening screw head can adjust the tightness of the U-shaped clamp A and the U-shaped clamp B within the range of 8 cm, thereby further improving the convenience of the installation of the composite expansion locking foot anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 It is a schematic diagram of the structure of the utility model;
[0023] Figure 2 This is a schematic diagram of the U-shaped clamping buckle structure of the utility model;
[0024] Figure 3 This is a schematic diagram of the expansion screw casing structure of the utility model;
[0025] Figure 4 This is a schematic diagram of the structure of the expansion and expansion sheet of the utility model;
[0026] Figure 5 It is a structural schematic diagram of the U-shaped clamp A of the utility model.
[0027] In the figure, 1. steel frame; 2. anchor rod A; 3. anchor rod B; 4. expansion screw; 5. threaded head; 6. nut; 7. gasket; 8. U-shaped clamping buckle; 9. expansion screw casing; 10. conical plug; 11. expansion expansion sheet; 12. air hole; 13. barb; 14. U-shaped clamp A; 15. tension screw head; 16. tension nut; 17. U-shaped clamp B. DETAILED DESCRIPTION
[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] Reference Figure 1-5A composite expansion locking foot anchor comprises a steel frame 1, an anchor rod A2 is arranged on one side of the steel frame 1, an anchor rod B3 is arranged on the other side of the steel frame 1, an expansion screw 4 is arranged on one end of the anchor rod A2 and the anchor rod B3, a threaded head 5 is arranged on the other end of the anchor rod A2 and the anchor rod B3, a nut 6 is arranged on one end of the threaded head 5, a U-shaped clamping buckle 8 is arranged on one side of the nut 6, an expansion screw sleeve 9 is arranged inside the expansion screw 4, a conical plug 10 is arranged on one end of the expansion screw sleeve 9, a conical plug 10 is arranged on one end of the anchor rod A2 and the anchor rod B3, four expansion expansion sheets 11 are arranged on one end of the expansion screw sleeve 9, an air hole 12 is arranged on the middle part of the expansion screw sleeve 9 near the expansion expansion sheet 11, and an air hole 12 is arranged on the expansion screw sleeve 9 when needed. Drill two holes on the wall or ground at the steel frame 1 where the locking foot anchor is to be installed, and inject rebar glue, insert the anchor rod A2 and the anchor rod B3 with the expansion screw 4 into the drilled holes, and tamp them tightly with a hammer, then use the U-clamp buckle 8 to clamp the threaded heads 5 of the anchor rods A2 and B3 on both sides of the steel frame 1, and then use the nut 6 to tighten the U-clamp buckle 8. While tightening the U-clamp buckle 8, the nut 6 drives the conical plug 10 inside the expansion screw 4 connecting the anchor rod A2 and the anchor rod B3 to move outward, so that the four expansion expansion pieces 11 with air holes 12 on the expansion screw casing 9 expand outward, thereby making the anchor rod more firmly fixed in the drilled hole, which greatly improves the convenience and stability of the installation of the composite expansion locking foot anchor, and the expansion The outer surface of the expansion screw 4 is provided with barbs 13, and the number of barbs 13 is 20. The 20 barbs 13 on the expansion screw 4 can prevent the expansion screw from moving out of the drill hole, thereby further increasing the stability of the composite expansion locking foot anchor rod. The interior of the U-shaped clamping buckle 8 is provided with a U-shaped clamp head A14 and a U-shaped clamp head B17. Both ends of the U-shaped clamp head A14 and the U-shaped clamp head B17 are provided with a tensioning screw head 15, and the tensioning screw head 15 is provided with a tensioning screw nut 16. The U-shaped clamp head A14, the U-shaped clamp head B17, the tensioning screw head 15 and the tensioning screw nut 16 inside the U-shaped clamping buckle 8 can quickly clamp the anchor rods on both sides of the steel frame 1, thereby further improving the convenience of installing the composite expansion locking foot anchor rod. A gasket 7 is arranged on one side of the nut 6. The gasket 7 is made of steel. The gasket 7 made of steel can increase the friction between the nut 6 and the U-shaped clamping buckle 8 when the nut 6 is tightened, so that the composite expansion locking foot anchor rod is installed more firmly. The length of the expansion screw 4 is 20 cm, and the length of the expansion expansion piece 11 is 10 cm. The expansion screw 4 with a length of 20 cm and the expansion expansion piece 11 with a length of 10 cm can increase the stability of the expansion screw in the drilled hole, thereby further increasing the stability of the installation of the composite expansion locking foot anchor rod. The length of the loosening screw head 15 is 8 cm, and the shape of the loosening screw head 15 is hexagonal. The loosening screw head 15 with a hexagonal shape can facilitate the loosening and tightening operation.The 10 cm long loosening screw head 15 can adjust the tightness of the U-shaped clamp A14 and the U-shaped clamp B17 within a range of 10 cm, thereby further improving the convenience of installing the composite expansion locking foot anchor rod.
[0030] The U-shaped clamping buckle 8 is then used to clamp the threaded heads 5 of the anchor rods A2 and B3 on both sides of the steel frame 1, and then the U-shaped clamping buckle 8 is tightened with a nut 6. When the nut 6 is tightened with the U-shaped clamping buckle 8, the conical plug 10 inside the expansion screw 4 connected with the anchor rod A2 and the anchor rod B3 moves outward, so that the four expansion expansion pieces 11 with air holes 12 on the expansion screw sleeve 9 expand outward, thereby making the anchor rod more firmly fixed in the drilled hole, greatly improving the convenience and stability of the installation of the composite expansion locking foot anchor rod. The 20 barbs 13 on the expansion screw 4 can prevent the expansion screw from moving out of the drilled hole, thereby further increasing the stability of the composite expansion locking foot anchor rod. The U-shaped clamp A14, U-shaped clamp B17, tensioning screw head 15 and tensioning screw nut 16 inside the buckle 8 can quickly clamp the anchor rods on both sides of the steel frame 1, thereby further improving the convenience of installing the composite expansion locking foot anchor rod. The gasket 7 made of steel can increase the friction between the screw nut 6 and the U-shaped clamping buckle 8 when the screw nut 6 is tightened, thereby making the installation of the composite expansion locking foot anchor rod more stable. The expansion screw 4 with a length of 20 cm and the expansion expansion piece 11 with a length of 10 cm can increase the stability of the expansion screw in the drilled hole, thereby further increasing the stability of the installation of the composite expansion locking foot anchor rod. The tensioning screw head 15 with a hexagonal appearance can facilitate the tensioning operation. The tensioning screw head 15 with a length of 10 cm can make the U-shaped clamp A14 and the U-shaped clamp B17 adjust the tightness within the range of 10 cm, thereby further improving the convenience of installing the composite expansion locking foot anchor rod.
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A composite expansion locking anchor rod, comprising a steel frame (1), characterized in that: An anchor rod A (2) is arranged on one side of the steel frame (1), and an anchor rod B (3) is arranged on the other side of the steel frame (1). An expansion screw (4) is arranged on one end of each of the anchor rods A (2) and B (3). A threaded head (5) is arranged on the other end of each of the anchor rods A (2) and B (3). A nut (6) is arranged on one end of each of the threaded heads (5). A U-shaped clamping buckle (8) is arranged on one side of the nut (6). An expansion screw sleeve (9) is arranged inside the expansion screw (4). A conical plug (10) is arranged on one end of the expansion screw sleeve (9). A conical plug (10) is arranged on one end of each of the anchor rods A (2) and B (3). Four expansion plates (11) are arranged on one end of the expansion screw sleeve (9). An air hole (12) is arranged in the middle of the expansion plate (11) of the expansion screw sleeve (9).
2. A composite expansion locking anchor rod according to claim 1, characterized in that: The outer surface of the expansion screw (4) is provided with barbs (13), and the number of the barbs (13) is 20.
3. The composite expansion locking anchor rod according to claim 1, characterized in that: The U-shaped clamping buckle (8) is provided with a U-shaped clamp head A (14) and a U-shaped clamp head B (17) inside, and both ends of the U-shaped clamp head A (14) and the U-shaped clamp head B (17) are provided with a loose screw head (15), and the loose screw head (15) is provided with a loose screw nut (16).
4. The composite expansion locking anchor rod according to claim 1, characterized in that: A gasket (7) is provided on one side of the screw nut (6), and the material of the gasket (7) is steel.
5. The composite expansion locking anchor rod according to claim 1, characterized in that: The length of the expansion screw (4) is 20 cm, and the length of the expansion expansion piece (11) is 10 cm.
6. The composite expansion locking anchor rod according to claim 3, characterized in that: The length of the tightening screw head (15) is 8 cm, and the shape of the tightening screw head (15) is hexagonal.