Special shearing adjusting sleeve device for prestressed anchorage device
By installing a shear adjustment sleeve between the anchor and the screw, the problem of anchor displacement under shear force is solved, the screw is protected, and the safety and stability of the prestressed tensioning equipment are improved.
Patent Information
- Application Number
- CN202521967068.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-12
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-12
AI Technical Summary
The anchorages of existing carbon fiber tendon prestressing tensioning equipment are prone to displacement under shear force, which can lead to damage or breakage of the screw, posing a safety hazard.
A special shear adjustment sleeve device for prestressed anchors is designed. Through the cooperation of the shear adjustment sleeve and the screw, the anchor is allowed to rotate to consume shear force when stress fluctuates, thus protecting the screw and the anchor.
It effectively reduces the shear force on the screw, prevents screw damage, and improves the safety and stability of the tensioning equipment.
Smart Images
Figure CN224679151U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anchor shear technology, specifically to a special shear adjustment sleeve device for prestressed anchors. Background Technology
[0002] Carbon fiber reinforcement is a composite material used for reinforcing bars, with carbon fiber as the reinforcement and resin as the matrix. In the prestressed tensioning process, the core principle is to apply tension to the carbon fiber reinforcement using tensioning equipment, causing it to undergo elastic deformation. This tension is then transferred to beams, slabs, and other structures, creating pre-existing compressive stress. When the structure is subjected to external loads, this pre-applied compressive stress can offset some of the tensile stress, thereby effectively improving the structure's crack resistance, stiffness, and load-bearing capacity.
[0003] Currently, most mainstream carbon fiber reinforced concrete (CFRP) prestressing tensioning equipment uses mechanically interlocking anchors to fix both ends of the CFRP and applies horizontal tension to achieve prestressing. In actual construction, the anchors need to be fixed to the base with bolts to ensure the stability of the tensioning environment. However, this approach has a significant drawback in shear strength: when the stress on the CFRP fluctuates, the anchors are prone to shifting, causing the bolts to bear enormous shear forces in a short period of time, which can even lead to bolt damage or breakage, resulting in serious safety hazards. Therefore, designing a dedicated shear adjustment sleeve device for prestressed anchors to reduce the risk of damage during tensioning has become an urgent problem to be solved. Utility Model Content
[0004] The purpose of this invention is to provide a special shear adjustment sleeve device for prestressed anchors, which can reduce the shear force borne by the screw, prevent the screw from being damaged or broken, and improve the safety of the tensioning equipment.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A shear adjustment sleeve device for prestressed anchorages is provided, including an anchorage, a base, and an installation and adjustment assembly. The anchorage is used to fix the product to be tested. A through circular hole is opened at the top of the anchorage. The installation and adjustment assembly includes a screw and a shear adjustment sleeve. The shear adjustment sleeve has a cylindrical structure and is rotatably installed in the circular hole. A through waist-shaped groove is opened at the center of the top of the shear adjustment sleeve. The screw passes through the waist-shaped groove and is slidably connected to it. The screw passes through the base and is fixedly connected to it.
[0007] Furthermore, the screw diameter is smaller than the diameter of the circular hole, and the outer periphery of the screw fits into the inner walls of both sides of the waist-shaped groove.
[0008] Furthermore, the shear adjustment sleeve includes a through part and a protrusion. The top of the through part and the bottom of the protrusion are coaxially connected. The diameter of the protrusion is larger than the diameter of the through part. The through part passes through the circular hole and is rotatably connected to it. The outer periphery of the bottom of the protrusion abuts against the top of the anchor.
[0009] Furthermore, multiple installation and adjustment components are installed, with each component positioned at one of the four corners of the anchor.
[0010] Furthermore, the top of the base has multiple through holes, which are horizontally spaced and located on both sides of the base. The screw passes through the through holes and is slidably connected to them.
[0011] Furthermore, the installation adjustment assembly also includes a pair of nuts, which are threadedly connected to the screw. The bottom of one nut abuts against the top of the shear adjustment sleeve, and the top of the other nut abuts against the top wall of the base.
[0012] The beneficial effects of this utility model are as follows: By setting up an anti-shear adjustment sleeve, when the carbon fiber reinforcement experiences stress fluctuations, the tension is transmitted to the anchor, causing it to shift. At this time, the stress of the anchor is transmitted to the screw through the anti-shear adjustment sleeve. Since the screw is fixed on the base, the anti-shear adjustment sleeve rotates under the joint compression of the anchor and the screw. The waist-shaped groove rotates to be parallel to the stress direction, thereby allowing the anchor to rotate slightly, consuming the shear force generated by stress fluctuations, protecting the fixing screw and anchor, and eliminating safety hazards. Attached Figure Description
[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 Disassembly of the overall structure of this utility model Figure 1 ;
[0016] Figure 3 Disassembly of the overall structure of this utility model Figure 2 ;
[0017] Figure 4 This is an exploded view of the installation and adjustment component structure of this utility model;
[0018] Figure 5 A cross-sectional view of the anchor structure of this utility model. Figure 1 ;
[0019] Figure 6 A cross-sectional view of the anchor structure of this utility model. Figure 2 .
[0020] In the picture:
[0021] 1. Anchor; 10. Round hole; 2. Installation and adjustment assembly; 20. Screw; 21. Shear adjustment sleeve; 210. Waist groove; 211. Through part; 212. Protrusion; 22. Nut; 3. Base; 30. Through hole. Detailed Implementation
[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0023] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0024] Reference Figures 1 to 6 The prestressed anchorage shear adjustment sleeve device shown includes an anchorage 1, a base 3, and an installation adjustment assembly 2. The anchorage 1 is used to fix the product to be tested. The top of the anchorage 1 has a through circular hole 10. The installation adjustment assembly 2 includes a screw 20 and a shear adjustment sleeve 21. The shear adjustment sleeve 21 has a cylindrical structure and is rotatably installed in the circular hole 10. The top center of the shear adjustment sleeve 21 has a through waist-shaped groove 210. The screw 20 passes through the waist-shaped groove 210 and is slidably connected to it. The screw 20 passes through the base 3 and is fixedly connected to it.
[0025] When installing anchor 1, first align the round hole 10 with the through hole 30 on the base 3, then insert the through portion 211 of the shear adjustment sleeve 21 into the round hole 10. Next, pass the screw 20 through the waist-shaped groove 210. Finally, install the two screws 20 at the top and bottom of the screw 20 respectively, and clamp the base 3 and the shear adjustment sleeve 21 with two nuts 22 to fix the screw 20. When the carbon fiber reinforcement experiences stress fluctuations, the tension is transmitted to anchor 1, causing it to shift. At this time, the stress in anchor 1 is transmitted to the screw 20 through the shear adjustment sleeve 21. Since the screw 20 is fixed to the base 3, the shear adjustment sleeve 21 rotates under the combined pressure of anchor 1 and screw 20. The waist-shaped groove 210 rotates to be parallel to the stress direction, allowing anchor 1 to rotate slightly, consuming the shear force generated by stress fluctuations, protecting the fixing screw 20 and anchor 1, and eliminating safety hazards.
[0026] like Figures 3 to 6As shown, the diameter of the screw 20 is smaller than the diameter of the circular hole 10, and the outer periphery of the screw 20 is in close contact with the inner walls of both sides of the waist-shaped groove 210. The screw 20 can move horizontally within the circular hole 10, and its outer periphery is not in complete contact with the inner wall of the waist-shaped groove 210. This means that when stress fluctuations occur, the outer periphery and inner wall of the shear adjustment sleeve 21 are subjected to opposing forces from the anchor 1 and the screw 20 in different directions, thereby causing rotation.
[0027] The shear adjustment sleeve 21 includes a through portion 211 and a protrusion 212. The top of the through portion 211 is coaxially connected to the bottom of the protrusion 212. The diameter of the protrusion 212 is larger than the diameter of the through portion 211. The through portion 211 passes through the circular hole 10 and is rotatably connected to it. The outer periphery of the bottom of the protrusion 212 abuts against the top of the anchor 1. The outer periphery of the shear adjustment sleeve 21 adopts a two-section design, which allows it to be stably inserted into the circular hole 10 and fixed by the nut 22, making it less likely to fall off. Furthermore, the through portion 211 does not fit against the inner wall of the circular hole 10, which reduces the friction between the shear adjustment sleeve 21 and the inner wall of the circular hole 10 when rotating to eliminate shear force, thereby improving the shear resistance.
[0028] Multiple installation adjustment components 2 are installed, and these components are respectively positioned at the four corners of the anchor 1. By fixing these multiple installation adjustment components 2 to the four corners of the anchor 1, the tension stability is improved, while the safety risk caused by the anchor 1 loosening during stress fluctuations is reduced.
[0029] like Figure 1 and Figure 2 As shown, the top of the base 3 has multiple through holes 30, which are horizontally spaced on both sides of the base 3. The screw 20 passes through the through holes 30 and is slidably connected to them.
[0030] The mounting adjustment assembly 2 also includes a pair of nuts 22, which are threadedly connected to the screw 20. The bottom of one nut 22 abuts against the top of the shear adjustment sleeve 21, and the top of the other nut 22 abuts against the top wall of the base 3.
[0031] When installing anchor 1, first move anchor 1 to a suitable position. The multiple through holes 30 allow for selection of the anchor 1's installation location as needed, expanding the equipment's applicability. After the screw 20 passes through anchor 1 and base 3, the screw 20 is secured by the threaded connection between the two nuts 22 and the screw 20, pressing the base 3, shear adjustment sleeve 21, and anchor 1 from the top and bottom. Simultaneously, the shear adjustment sleeve 21 can rotate around the screw 20 to eliminate shear force.
[0032] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.
Claims
1. A special shear adjustment sleeve device for prestressed anchorages, characterized in that, The device includes an anchor (1), a base (3), and an installation adjustment assembly (2). The anchor (1) is used to fix the product to be tested. The top of the anchor (1) has a through round hole (10). The installation adjustment assembly (2) includes a screw (20) and a shear adjustment sleeve (21). The shear adjustment sleeve (21) is a cylindrical structure. The shear adjustment sleeve (21) is rotatably installed in the round hole (10). A through waist-shaped groove (210) is opened at the center of the top of the shear adjustment sleeve (21). The screw (20) passes through the waist-shaped groove (210) and is slidably connected to it. The screw (20) passes through the base (3) and is fixedly connected to it.
2. The prestressed anchorage special shear adjustment sleeve device according to claim 1, characterized in that, The diameter of the screw (20) is smaller than the diameter of the round hole (10), and the outer periphery of the screw (20) fits against the inner walls of both sides of the waist-shaped groove (210).
3. The prestressed anchorage special shear adjustment sleeve device according to claim 1, characterized in that, The shear adjustment sleeve (21) includes a through part (211) and a protrusion (212). The top of the through part (211) is coaxially connected to the bottom of the protrusion (212). The diameter of the protrusion (212) is larger than the diameter of the through part (211). The through part (211) passes through the round hole (10) and is rotatably connected to it. The outer periphery of the bottom of the protrusion (212) abuts against the top of the anchor (1).
4. The prestressed anchorage special shear adjustment sleeve device according to claim 1, characterized in that, The number of installation adjustment components (2) is multiple, and the multiple installation adjustment components (2) are respectively placed at the four corners of the anchor (1).
5. The prestressed anchorage special shear adjustment sleeve device according to claim 1, characterized in that, The base (3) has multiple through holes (30) at the top. The multiple through holes (30) are horizontally spaced on both sides of the base (3). The screw (20) passes through the through holes (30) and is slidably connected to them.
6. The prestressed anchorage special shear adjustment sleeve device according to claim 5, characterized in that, The installation adjustment assembly (2) also includes a pair of nuts (22) that are threadedly connected to the screw (20). The bottom of one nut (22) abuts against the top of the shear adjustment sleeve (21), and the top of the other nut (22) abuts against the top wall of the base (3).