Built-in low-prestress resin anchor rod
By improving the traditional sleeve connection into a built-in structure, the problem of voids during the mixing of anchoring agent is solved, resulting in a more efficient anchoring effect and stability.
Patent Information
- Application Number
- CN202520354955.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Existing resin anchors are prone to voids during the mixing of anchoring agents, which affects the anchor's performance.
The anchor bolt is a built-in low-prestress resin bolt, which includes an anchoring section, a connecting sleeve, and a free section. The anchor end is provided with a resin extrusion hole, and the anchoring section has a cavity. The outer diameter of the free section is smaller than the inner diameter of the anchoring section. The struts are evenly distributed in the circumferential direction of the anchor end, and the struts have needles on the outside. The front end of the anchor end has a tapered structure to improve the centering.
It reduced the loading time of the explosive cartridge and the failure rate of delivery, ensured the anchoring force effect, ensured the uniform distribution of the anchoring agent, and improved the anchoring effect.
Smart Images
Figure CN223825017U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anchor bolt construction technology; specifically, this utility model relates to a built-in low-prestress resin anchor bolt. Background Technology
[0002] Existing resin anchor products all use sleeve-connected steel bars, especially the resin section which uses steel bars with longitudinal ribs. The structure of the rod body is prone to voids during the mixing of the anchoring agent, which affects the anchor effect. Utility Model Content
[0003] In view of this, the present invention provides a built-in low-prestress resin anchor rod, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.
[0004] To achieve the aforementioned objectives, this utility model provides a built-in low-prestress resin anchor bolt, comprising an anchoring section rod body, an anchor end provided at the front end of the anchoring section rod body, a connecting sleeve provided at the rear end of the anchoring section rod body, a free section rod body internally threaded to the connecting sleeve, a resin extrusion hole provided on the anchor end, mortar outlets provided on the anchoring section rod body and the free section rod body, a butterfly-shaped pad provided at the rear end of the free section rod body, a nut threaded onto the free section rod body at the rear end of the butterfly-shaped pad, a cavity for placing resin anchoring agent provided inside the anchoring section rod body, and the outer diameter of the free section rod body being smaller than the inner diameter of the anchoring section rod body.
[0005] In one of the built-in low-prestress resin anchor bolts as described above, optionally, the anchoring section of the bolt body is provided with an extrusion block for squeezing the resin anchoring agent.
[0006] In the aforementioned built-in low-prestress resin anchor, optionally, the front end of the anchor end is provided with a tapered structure, and a plurality of support rods are slidably provided on the tapered surface of the anchor end. The plurality of support rods are equidistantly distributed in the circumferential direction of the anchor end, and the outer surface of the support rods is provided with needles for insertion into the wall of the anchor hole.
[0007] In the aforementioned built-in low-prestress resin anchor, optionally, the strut includes a first rod body, a second rod body, and a third rod body. The first rod body and the third rod body are both arranged parallel to the anchoring section rod body. The second rod body is vertically fixed between the front ends of the first rod body and the third rod body. The first rod body is located inside the third rod body, and the needle is fixed on the outer surface of the third rod body.
[0008] In the aforementioned built-in low-prestress resin anchor, optionally, a groove is provided on the conical surface of the anchor end, a slider is slidably disposed in the groove, and the tail ends of the first rod body and the third rod body are both fixedly connected to the slider.
[0009] In the aforementioned built-in low-prestress resin anchor, optionally, the front end face of the anchor end is fixedly provided with an elastic card corresponding to the support rod, and the elastic card is used to fix the support rod at the innermost position of the anchor end radially.
[0010] In the aforementioned built-in low-prestress resin anchor, optionally, when the strut is located at the innermost radial position of the anchor end, the radius of the arc where the third rod body is located is smaller than the outer diameter of the anchor end.
[0011] This utility model discloses a built-in low-prestress resin anchor bolt, which improves the traditional sleeve connection into a built-in anchor bolt, reducing the loading time of the injection cartridge and the failure rate of the injection, ensuring the anchoring force effect. At the same time, it ensures that the anchor bolt as a whole is aligned with the anchor hole, so that the anchoring agent is more evenly distributed around the anchor bolt, thereby further improving the anchoring effect. Attached Figure Description
[0012] The disclosure of this utility model will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:
[0013] Figure 1 This is a cross-sectional view of the built-in low-prestress resin anchor bolt of this utility model.
[0014] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle.
[0015] Figure 3 This utility model Figure 1 Enlarged view of section B in the middle.
[0016] Figure 4 This utility model Figure 1 Enlarged view of point C.
[0017] Figure 5 This utility model Figure 1 Enlarged view of point D in the middle.
[0018] Figure 6 This is a schematic diagram of the structure of the anchor end of this utility model.
[0019] Reference numerals in the attached drawings: 1-Anchoring section rod; 2-Anchor end; 3-Connecting sleeve; 4-Free section rod; 5-Resin extrusion hole; 6-Mortar outlet; 7-Butterfly pad; 8-Nut; 9-Extrusion block; 10-Support rod; 10.1-First rod; 10.2-Second rod; 10.3-Third rod; 11-Groove; 12-Slider; 13-Elastic clip; 14-Needle. Detailed Implementation
[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0021] like Figures 1 to 6 As shown, this embodiment provides a built-in low-prestress resin anchor bolt, including an anchoring section 1, an anchor end 2 at the front end of the anchoring section 1, a connecting sleeve 3 at the rear end of the anchoring section 1, a free section 4 internally threaded onto the connecting sleeve 3, a resin extrusion hole 5 on the anchor end 2, mortar outlets 6 on the anchoring section 1 and the free section 4, a butterfly-shaped pad 7 at the rear end of the free section 4, a nut 8 threaded onto the free section 4 at the rear end of the butterfly-shaped pad 7, a cavity for placing resin anchoring agent inside the anchoring section 1, and the outer diameter of the free section 4 being smaller than the inner diameter of the anchoring section 1.
[0022] The built-in low-prestress resin anchor bolt of this embodiment improves the traditional sleeve connection into a built-in anchor bolt, reducing the loading time of the drug roll and the failure rate of drug delivery, and ensuring the anchoring effect.
[0023] The construction process of the built-in low-prestress resin anchor in this embodiment is as follows:
[0024] Step 1: Preparation: Equipment and materials preparation and inspection, equipment and materials arrival on site, equipment connection to water, electricity and ventilation.
[0025] Step 2, Anchor Bolt Construction Hole Layout: Drilling and Setting Out.
[0026] Step 3, Drilling: While the drill rod is drilling, the hole is cleaned by flushing the hole with high-pressure water to remove the broken rock debris from the bottom of the hole.
[0027] Step 4: Insert anchor bolts, extrude anchoring agent and stir: Push to the bottom to extrude anchoring agent, and rotate to stir.
[0028] Step 5, Anchoring agent equal strength: The anchoring agent AB glue is mixed, reacted, and solidified to obtain strength.
[0029] Step 6, Grouting: Grouting continues until grout returns to the exhaust pipe or the inner hole of the rod, indicating that the grouting is complete.
[0030] The anchoring section 1 is equipped with an extrusion block 9 for squeezing the resin anchoring agent. After the anchoring section 1 is placed into the anchor hole, the anchor wrench is connected to the nut 8 and rotated, causing the free section 4 to move forward in the anchoring section 1 and push the extrusion block 9 to squeeze the resin anchoring agent, so that the resin anchoring agent is squeezed out from the resin extrusion hole 5.
[0031] The front end of the anchor end 2 is designed as a tapered structure, and multiple support rods 10 are slidably disposed on the tapered surface of the anchor end 2. The multiple support rods 10 are equidistantly distributed in the circumferential direction of the anchor end 2. In this embodiment, by setting the support rods 10, during the process of placing the anchoring section rod 1 into the anchor hole, the support rods 10 will be displaced on the surface of the anchor end 2 after being squeezed by the inner wall of the anchor hole, so that the support rods 10 are finally supported on the inner sidewall of the anchor hole. At this time, the cooperation of multiple support rods 10 can realize the alignment between the anchor rod and the anchor hole and improve the stability of the anchoring section rod 1.
[0032] In a relatively specific embodiment, the strut 10 includes a first rod 10.1, a second rod 10.2, and a third rod 10.3. The first rod 10.1 and the third rod 10.3 are both arranged parallel to the anchoring section rod 1. The second rod 10.2 is vertically fixed between the front ends of the first rod 10.1 and the third rod 10.3. The first rod 10.1 is located inside the third rod 10.3, and the needle 14 is fixedly arranged on the outer surface of the third rod 10.3.
[0033] By making the strut 10 as described above, during the process of inserting the anchor rod into the anchor hole, the second rod 10.2 will contact the front end face of the anchor hole. As the anchor rod continues to be inserted, the second rod 10.2 will be displaced outward along the conical surface of the anchor end 2 under pressure, so that the strut 10 automatically abuts against the side wall of the anchor hole.
[0034] In this embodiment, a groove 11 is formed on the conical surface of the anchor end 2, and a slider 12 is slidably disposed within the groove 11. The tail ends of the first rod 10.1 and the third rod 10.3 are both fixedly connected to the slider 12. In this embodiment, both the groove 11 and the slider 12 are configured with a "T" shaped cross-section. The slider 12 connects the tail ends of the first rod 10.1 and the third rod 10.3 simultaneously, which can improve the overall stability of the support rod 10.
[0035] The front end face of the anchor end 2 is fixedly provided with elastic clips 13 corresponding one-to-one with the support rods 10. The elastic clips 13 are used to fix the support rods 10 at the innermost radial position of the anchor end 2. When the support rods 10 are located at the innermost radial position of the anchor end 2, the radius of the arc where the third rod body 10.3 is located is smaller than the outer diameter of the anchor end 2. In this embodiment, the elastic clips 13 are U-shaped structures and are metal springs, which can ensure that the crossbar is located at the innermost position in the initial state, making it easier for the anchor rod to be inserted into the anchor hole.
[0036] In a relatively specific embodiment, the outer surface of the third rod 10.3 is provided with a needle 14 for insertion into the wall of the anchor hole. By providing the needle 14, when the support rod 10 abuts against the inner wall of the anchor hole, the needle 14 will be inserted into the hole wall, improving the stability of the support rod 10, and thus improving the stability of the anchor rod support and positioning.
[0037] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.
Claims
1. A built-in low-prestress resin anchor bolt, characterized in that, The system includes an anchoring section rod (1), an anchor end (2) at the front end of the anchoring section rod (1), a connecting sleeve (3) at the rear end of the anchoring section rod (1), a free section rod (4) internally threaded into the connecting sleeve (3), a resin extrusion hole (5) on the anchor end (2), mortar outlets (6) on the anchoring section rod (1) and the free section rod (4), a butterfly-shaped pad (7) at the rear end of the free section rod (4), a nut (8) threaded onto the free section rod (4) at the rear end of the butterfly-shaped pad (7), a cavity for placing resin anchoring agent inside the anchoring section rod (1), and the outer diameter of the free section rod (4) is smaller than the inner diameter of the anchoring section rod (1).
2. The built-in low-prestress resin anchor bolt according to claim 1, characterized in that, The anchoring section rod (1) is provided with an extrusion block (9) for squeezing the resin anchoring agent.
3. The built-in low-prestress resin anchor bolt according to claim 1, characterized in that, The front end of the anchor end (2) is configured as a conical structure, and multiple support rods (10) are slidably arranged on the conical surface of the anchor end (2). The multiple support rods (10) are equidistantly distributed in the circumferential direction of the anchor end (2).
4. The built-in low-prestress resin anchor bolt according to claim 3, characterized in that, The strut (10) includes a first rod (10.1), a second rod (10.2), and a third rod (10.3). The first rod (10.1) and the third rod (10.3) are both arranged parallel to the anchoring section rod (1). The second rod (10.2) is vertically fixed between the front ends of the first rod (10.1) and the third rod (10.3). The first rod (10.1) is located inside the third rod (10.3), and the needle (14) is fixedly arranged on the outer surface of the third rod (10.3).
5. The built-in low-prestress resin anchor bolt according to claim 4, characterized in that, A groove (11) is provided on the conical surface of the anchor end (2), and a slider (12) is slidably arranged in the groove (11), and the tail ends of the first rod (10.1) and the third rod (10.3) are fixedly connected to the slider (12).
6. The built-in low-prestress resin anchor bolt according to claim 5, characterized in that, The front end face of the anchor end (2) is fixedly provided with elastic cards (13) corresponding one-to-one with the support rod (10), and the elastic cards (13) are used to fix the support rod (10) at the innermost radial position of the anchor end (2).
7. A built-in low-prestress resin anchor bolt according to claim 6, characterized in that, When the strut (10) is located at the innermost radial position of the anchor end (2), the radius of the arc where the third rod (10.3) is located is smaller than the outer diameter of the anchor end (2).
8. The built-in low-prestress resin anchor bolt according to claim 4, characterized in that, The outer surface of the third rod (10.3) is provided with a needle (14) for insertion into the wall of the anchor hole.