Prestress tension anchorage device

Abstract

The invention discloses a prestress tensioning anchorage device, and relates to the field of prestress construction technical equipment, the prestress tensioning anchorage device comprises a first shell, the middle of the first shell is provided with a second anchor hole for a middle steel strand to penetrate through, and the outer ring of the first shell is annularly provided with a plurality of first anchor holes for outer ring steel strands to penetrate through and bolt holes; a clamping mechanism for fixing a middle steel strand penetrating through the second anchor hole is rotationally arranged in the middle of one side of the first shell, and a plurality of fixing mechanisms for fixing an outer ring steel strand penetrating through the first anchor hole are rotationally arranged at the position, corresponding to the bolt holes, of the first shell. The spur gear is rotated to drive the gear nut to rotate, the screw and the hollow screw are driven to enable the outer ring clamping piece and the middle clamping piece to fix the steel strand, after the spur gear continues to be rotated to be further tightened, a metal-based repairing agent is poured into the grouting hole for reinforcement, the device is easy and convenient to operate, the steel strand can conveniently penetrate into the anchorage device, the construction efficiency is improved, and the construction period is shortened. And the stability of the anchoring device is enhanced.

Description

Technical Field

[0001] The present application relates to the field of structural components, more specifically to prestressed concrete equipment, and in particular to a prestressed tensioning anchor. Background Art

[0002] Anchors are metal components that are commonly used in prestressed concrete structures to maintain and transfer the tension of steel strands to concrete. After tensioning, the steel strands can be fixed to the ends of the components to prevent shrinkage. They are widely used in bridges, buildings, water conservancy and other fields to enhance the performance of concrete structures.

[0003] At present, the installation of anchors requires that steel strands such as steel wires be aligned with the anchor holes and inserted into the anchor holes. After being tensioned to the specified tension, they are anchored by clips, nuts, etc. However, due to the limited size of the anchor holes, the insertion of steel strands such as steel wires and the insertion of clips are extremely difficult, which not only brings many inconveniences to the installation work, but also prolongs the installation time, reduces construction efficiency, and affects the construction period. Summary of the Invention

[0004] In order to improve the problem of inconvenience in anchor installation, the present application provides a prestressed tension anchor, which adopts the following technical solution: A prestressed tension anchor comprises a shell, wherein the middle portion of the shell is provided with an anchor hole 2 for passing a middle steel strand, the outer ring of the shell is provided with a plurality of anchor holes 1 and bolt holes for passing the outer steel strand, a clamping mechanism for fixing the middle steel strand passing through the anchor hole 2 is rotatably provided in the middle portion of one side of the shell, and a plurality of fixing mechanisms for fixing the outer steel strand passing through the anchor hole 1 are rotatably provided on the shell corresponding to the bolt holes; a spur gear is movably provided on one side of the shell, a shell 2 is fixedly provided on the side of the shell facing away from the spur gear, the shells 1 and 2 together constitute an anchor body, and a grouting hole for injecting a metal-based repair agent is provided on one of the anchor holes of the shell. The fixing mechanism includes a screw rod passing through a bolt hole and a rotating disk fixed to the end of the screw rod. A gear nut for driving the screw rod to rotate is provided on a threaded sleeve in the middle of the screw rod. A clamping block with a flattened inclined surface at the bottom end is symmetrically slidably provided on the side of the rotating disk away from the screw rod. Fixed blocks are symmetrically fixed to the top ends of the two clamping blocks. Outer ring clips with tapered inner walls are symmetrically fixed to the upper ends of the opposite sides of the two fixing blocks. The two outer ring clips form a complete circular hole after clamping. The clamping mechanism includes a hollow screw coaxially connected and passed through the shell body and a limiting ring fixed at one end of the hollow screw. A rotating block is fixed on the side of the limiting ring away from the hollow screw. The rotating block slides with the limiting shell on the side away from the limiting ring. The rotating block is close to the limiting shell. A plurality of radially sliding middle clips with conical inner walls are distributed on the circumference of the end face of the rotating block close to the limiting shell. The plurality of middle clips shrink toward the center of the circle synchronously, and the middle clips are tightened under the action of tension. The threaded sleeve of the hollow screw is provided with a gear nut and a threaded rubber ring for rotational drive and self-locking.

[0005] By adopting the above technical solution, the hollow screw, rotating block and other components of the clamping mechanism cooperate to drive the middle clamp to accurately clamp and fix the middle steel strand of shell one, and the screw, turntable and other components of the fixing mechanism cooperate to drive the clamp and the outer ring clamp to move, thereby achieving effective fixation of multiple steel strands in the outer ring of shell one. The grouting hole is used to inject metal-based repair agent into the anchor to fill the gap in the anchor hole, enhance the connection sealing between the anchor and the steel strand and the overall anchoring performance. Shell two and shell one cooperate to achieve collaborative anchoring and enhance anchoring stability.

[0006] Preferably, a threaded rubber ring 1 is fixedly provided on the side of the gear nut 1 facing away from the turntable and is threadedly sleeved on the screw.

[0007] By adopting the above technical solution, the gear nut and the threaded rubber ring are threadedly sleeved in the middle of the screw. When the gear nut rotates, the screw is driven to rotate synchronously by the thread engagement, and then cooperates with other components to complete the anchoring operation.

[0008] Preferably, a sliding groove 1 is symmetrically provided on one side of the turntable close to the clamping block, and a sliding rod 1 sliding inside the sliding groove 1 is fixed on the lower end of the clamping block close to the turntable.

[0009] By adopting the above technical solution, the slide groove 1 provides a guide track for the movement of the clamping block, and cooperates with the slide rod 1 to enable the clamping block to slide stably along the slide groove 1, thereby achieving accurate and smooth operation of the clamping action.

[0010] Preferably, the second gear nut is threadedly sleeved on the middle part of the hollow screw, and the side of the second gear nut facing away from the limiting ring is fixed to the second threaded rubber ring.

[0011] By adopting the above technical solution, the gear nut 2 and the threaded rubber ring 2 are threadedly sleeved in the middle of the hollow screw. When the gear nut 2 rotates, the hollow screw is driven to rotate synchronously by the thread engagement, and the anchoring operation is realized in cooperation with other components.

[0012] Preferably, a plurality of limiting holes are circumferentially opened on both sides of the limiting shell, and a second sliding rod sliding in the rotating block is fixed on both ends of the middle clip.

[0013] By adopting the above technical solution, the sliding rods at both ends of the middle clamp slide in the rotating block, so that the middle clamp slides stably relative to the rotating block, thereby realizing the clamping action of the middle clamp on the steel strand.

[0014] Preferably, a fixing seat is provided on the outer fixing sleeve of the limiting shell.

[0015] By adopting the above technical solution, the fixing seat is fixedly sleeved on the outside of the limiting shell, providing fixed support for the limiting shell, so that it maintains a stable position in the device, facilitating the coordinated operation of other components.

[0016] Preferably, a plurality of steel strands are movably passed through the middle portion and the outer ring of the shell.

[0017] By adopting the above technical solution, multiple steel strands are movable through the middle part and outer ring of the shell to withstand and transmit external tension to enhance the structural bearing capacity.

[0018] Preferably, multiple steel strands are passed through anchor hole 1, bolt hole and circular groove in sequence, and the gear nut 1 and gear nut 2 are driven to rotate by rotating the spur gear, driving the screw and the hollow screw to fix the outer ring clamp and the middle clamp to the steel strand, and then the spur gear is continued to be rotated to further tighten.

[0019] Preferably, the second gear nut is engaged with the spur gear, and a fixing rod is movably provided through the middle of the spur gear.

[0020] By adopting the above technical solution, one side of the gear nut engages with the spur gear to realize transmission, and the fixing rod enables the spur gear to rotate stably to cooperate with the gear nut to complete the relevant transmission operation.

[0021] Preferably, the grouting holes, through hole three, through hole two and through hole one are interconnected, and the outer ring clamp injects metal-based repair agent into the grouting holes after stably fixing the steel strand, and the gap between the structure inside the fixing mechanism and the steel strand and shell one is filled and fixed.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. By passing multiple steel strands through the anchor hole 1, bolt hole and circular groove in sequence, and rotating the spur gear to drive the gear nut 1 and gear nut 2 to rotate, the screw and the hollow screw are driven to fix the outer ring clamp and the middle clamp to the steel strand, and then the spur gear is further rotated to further tighten, and finally a metal-based repair agent is poured into the grouting hole for reinforcement. The device is easy to operate and allows steel strands such as steel strands to be easily inserted into the anchor hole of the anchor, which helps to improve construction efficiency, shorten construction period, strengthen the anchoring effect and device stability, and also helps to improve the durability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is an overall axonometric diagram of the present application; Figure 2 This is a schematic diagram of the front view axonometric view of the present application; Figure 3 This is a schematic diagram of the right viewing axis side of this application; Figure 4 This is a schematic diagram of the internal structure of this application; Figure 5 This is a schematic diagram of the grouting route for this application; Figure 6 This is a schematic diagram of the fixing mechanism structure of this application; Figure 7 This is an exploded view of the fixing mechanism structure of this application; Figure 8 This is a schematic diagram of the outer ring clip structure of this application; Figure 9 A cross-sectional view of the clamping mechanism of this application; Figure 10 This is an exploded view of the clamping mechanism structure of this application; Figure 11 This is a schematic diagram of the internal structure of the shell of this application.

[0024] Reference numerals: 1, housing 1; 2, fixing mechanism; 3, clamping mechanism; 4, fixing rod; 5, spur gear; 6, housing 2; 7, anchor hole 1; 8, bolt hole; 9, anchor hole 2; 10, fixing seat; 11. Guide hole; 12. Steel strand; 13. Circular groove; 14. Grouting hole; 201. Screw; 202. Turntable; 203. Gear nut 1; 204. Clamping block; 205. Fixing block; 206. Outer ring clamp; 207, slide bar 1; 208, threaded rubber ring 1; 209, threaded slot hole 1; 210, threaded hole 2; 211, slide slot 1; 212, through hole 1; 213, through hole 2; 214, through hole 3; 301. Hollow screw; 302. Gear nut 2; 303. Limiting shell; 304. Middle clip; 305. Sliding rod 2; 306. Round hole 1; 307. Rotating block; 308. Through hole 4; 309. Round hole 2; 310. Threaded rubber ring 2; 311. Limiting ring; 312. Limiting hole. DETAILED DESCRIPTION

[0025] The following is combined with Figures 1-11 This application is described in further detail.

[0026] The embodiment of the present application discloses a prestressed tension anchor.

[0027] Reference Figure 1-Figure 5 、 Figure 11The prestressed concrete equipment of the present application belongs to a structural component and provides a prestressed tensioning anchor, including a shell 1 and a clamping mechanism 3 rotatably arranged in the middle of one side of the shell 1, the clamping mechanism 3 is used to fix the steel strand 12 inserted into the middle of the shell 1, and a plurality of fixing mechanisms 2 are provided in a ring array on the outer edge of the shell 1 on the side where the clamping mechanism 3 is located, and the fixing mechanisms 2 are used to fix the plurality of steel strands 12 inserted into the outer ring of the shell 1; an anchor hole 29 is opened in the middle of the shell 1, a plurality of bolt holes 8 are opened on the outer circumference of the anchor hole 29 of the shell 1, and a plurality of anchor holes 7 are opened on the outer circumference of the bolt hole 8 of the shell 1, and a plurality of steel strands 12 are movably passed through the anchor hole 29 and the anchor hole 7, the diameter of the anchor hole 7 is larger than the diameter of the steel strand 12, and the diameter of the anchor hole 29 is larger than the anchor hole 7, so as to facilitate the easy insertion of the steel strand 12, and the number of the anchor holes 7 is the same as the number of the bolt holes 8.

[0028] Before using the device, it is necessary to install the fixing mechanism 2 and the clamping mechanism 3 in the middle of the shell 1, so that the gear nut 2 302 is meshed with the multiple gear nuts 203, and the fixing rod 4 is vertically welded to the surface of the shell 1, located on the outside of the meshing point of the two gear nuts 203, and fix the shell 2 6 to the shell 1. When in use, insert multiple steel strands 12 into the anchor holes 2 9 and the anchor holes 1 7 in sequence, and tension the steel strands 12 through tensioning equipment such as jacks, so that the spur gear 5 is sleeved on the outside of the fixing rod 4 and meshed with its two gear nuts 203. The spur gear 5 is driven by an electric wrench, and a hexagonal positioning hole is set at the connection between the driving end and the spur gear 5. A limit block is provided at the output end of the wrench, and the shape of the limit block is adapted to the hexagonal positioning hole to ensure that the rotation direction and angle control are adjustable, driving multiple gear nuts 203 and gear nuts 302 to rotate, thereby causing multiple outer ring clips 206 to move relative to each other, and at the same time causing multiple middle clips 304 to slide radially toward the center of the circle, and clamping is achieved by moving the slide rod 2 305 in the limit hole 312, thereby firmly fixing multiple steel strands 12. When the jack and other tensioning equipment are removed, the steel strand 12 drives the outer ring clip 206 and the middle clip 304 to move toward the circular groove 13 on the surface of the shell 2 6, making the fixation of the steel strand 12 more stable.

[0029] The inner side of the shell 1 is provided with a circular groove 13 at the outer side of the bolt hole 8, and the shell 1 is provided with a grouting hole 14 at the anchor hole 7 thereof (the shape of the grouting hole 14 is as follows). Figure 2As shown), it is used to inject metal-based repair agent, which is a composite material made of metal powder as aggregate and high molecular polymer as auxiliary agent. It is used to fill the gap between the shell 1, the fixing mechanism 2, the clamping mechanism 3 and the steel strand 12 to form a solid whole. The angle between the two fixing mechanisms 2 is meshed with a spur gear 5, and a fixing rod 4 is movably provided through the middle of the spur gear 5. The fixing rod 4 is fixed to the surface of the shell 1 on the side close to the shell 1, and the shell 1 is fixed with a shell 2 6 on the side away from the spur gear 5. The shell 1 and the shell 2 6 together constitute an anchor body.

[0030] After the fixation is completed, a metal-based repair agent is injected into the grouting hole 14. The metal-based repair agent flows into the gap area of the two outer ring clips 206 and the outer space through the through hole three 214 and the through hole two 213, and at the same time penetrates into the interior of the limit shell 303 from the guide hole 11 and the through hole four 308, fully filling the gaps between the shell 1, the fixing mechanism 2, the clamping mechanism 3 and the steel strand 12 and achieving firm fixation. After the filling operation is completed, the component spur gear 5 is removed, and then the gaps between the multiple gear nuts 203 and the shell 1 are welded.

[0031] Reference Figure 6-Figure 8 The fixing mechanism 2 includes a screw 201 and a turntable 202 fixed at one end of the screw 201. The diameter of the turntable 202 is consistent with the diameter of the circular groove 13. The turntable 202 is movably clamped in the circular groove 13. The surface of the end of the screw 201 away from the shell 1 is threaded. The end of the screw 201 close to the shell 1 is movably inserted into the bolt hole 8. The side of the turntable 202 away from the screw 201 is provided with a rotationally symmetrical sliding groove 211. The sliding groove 211 is generally arc-shaped (such as Figure 7 As shown), it is used to provide a guide and sliding track for the slide bar 207. The slide bar 207 is provided with a slide inside the slide groove 211. The end of the slide bar 207 away from the turntable 202 is fixed with a clamping block 204. The lower ends of the opposite sides of the two clamping blocks 204 are flattened inclined surfaces, and the curvature and size of the two inclined surfaces are consistent. The tops of the two clamping blocks 204 are symmetrically fixed with fixed blocks 205. The upper ends of the opposite sides of the two fixed blocks 205 are arc-shaped, and the lower ends are rectangular, which are used to connect the fixed clamping blocks 204 and the outer ring clamping pieces 206.

[0032] Since the spur gear 5 is meshed with the gear nut 203, the gear nut 203 is driven to rotate by rotating the spur gear 5. Since the gear nut 203 and the threaded rubber ring 208 are simultaneously threadedly sleeved on the threaded end of the screw 201, the gear nut 203 drives the threaded rubber ring 208 to rotate. At the same time, the friction between the threaded rubber ring 208, the gear nut 203 and the screw 201 causes the screw 201 to rotate, thereby causing the turntable 202 to rotate inside the circular groove 13 with the screw 201 as the center, driving the two slide bars 207 to slide in the slide groove 211 on the turntable 202. Since the bottom end of the clamping block 204 slides radially along the outer side of the fixed seat 10, the slide bar 207 drives the two clamping blocks 204 to move relative to each other, thereby causing the two fixed blocks 205 to drive the two outer ring clips 206 to move in relative directions, so that the two outer ring clips 206 stably fix the steel strand 12.

[0033] The outer ring clips 206 are symmetrically fixed on the upper ends of the two fixing blocks 205 on opposite sides. The outer ring clips 206 are half of a hollow cone. The inner wall diameter of one end of the outer ring clips 206 is larger than the inner wall diameter of the other end (the shape of the outer ring clips 206 is as shown in FIG. Figure 7 As shown), it is used to clamp and fix the steel strand 12; a through hole three 214 is provided in the middle of the side of the outer ring clamp 206 facing the shell 1, and the through hole three 214 is connected to the grouting hole 14; a through hole two 213 is provided on the outer wall of the outer ring clamp 206, and the through hole two 213 is connected to the through hole three 214; a through hole one 212 is provided on the upper end of the fixing block 205, and the through hole one 212 is connected to the through hole three 214, and the through hole one 212 and the through hole three 214 are consistent in shape and size; a gear nut one 203 is provided on the middle threaded sleeve of the screw 201 (the gear nut one 203 is a cylindrical metal nut with an external gear, used to transmit torque and realize mechanical connection, usually made of steel or alloy to ensure strength and wear resistance), the gear nut one 203 is located on the outside of the shell 1, and the gear nut one 203 is in contact with the surface of the shell 1 on the side close to the shell 1.

[0034] The inner wall of the gear nut 203 is provided with a threaded slot hole 209, and the gear nut 203 is threadedly sleeved on the screw 201 through the threaded slot hole 209. A threaded rubber ring 208 is fixed on the side of the gear nut 203 away from the turntable 202 (the threaded rubber ring 208 is made of nitrile rubber, which has the advantages of good sealing, strong elastic fit, high friction and stable transmission, and resistance to certain medium corrosion). The inner side of the threaded rubber ring 208 is provided with a threaded hole 210 (the inner ring of the threaded hole 210 is specially processed). The texture of the threaded rubber ring 208, such as wavy or sawtooth, increases the contact area and friction between the threaded rubber ring 208 and the thread of the screw 201. When the threaded rubber ring 208 is subjected to external force, the texture and the thread of the screw 201 engage with each other, generating greater friction, thereby driving the screw 201 to rotate). The threaded rubber ring 208 is threadedly sleeved on the screw 201 through the threaded hole 210; the teeth on the surface of the spur gear 5 mesh with the teeth on the surface of its second gear nut 203, and multiple gear nuts 203 mesh with each other.

[0035] When the outer ring clip 206 moves to the limit distance, the spur gear 5 continues to rotate to drive the gear nut 203 and the threaded rubber ring 208 to move on the screw 201, so that the gear nut 203 and the threaded rubber ring 208 tighten the screw 201. When the steel strand 12 needs to be released, the spur gear 5 is rotated in the opposite direction to drive the gear nut 203 to rotate, so that the outer ring clip 206 leaves the steel strand 12, thereby releasing the steel strand 12. Due to the mutual connection between the grouting hole 14, the through hole 3 214, the through hole 213, and the through hole 1 212, the outer ring clip 206 injects a metal-based repair agent into the grouting hole 14 after stably fixing the steel strand 12, so that the gap between the structure inside the fixing mechanism 2 and the steel strand 12 and the shell 1 is filled and fixed.

[0036] Reference Figures 9-11The clamping mechanism 3 includes a hollow screw 301 and a limiting ring 311 fixed at one end of the hollow screw 301. The end of the hollow screw 301 away from the shell 1 is provided with a thread. The end of the hollow screw 301 close to the shell 1 is movable and passes through the anchor hole 29. The inner ring of the limiting ring 311 close to the hollow screw 301 is fixed to the end of the hollow screw 301 located in the anchor hole 29. The outer ring of the limiting ring 311 close to the hollow screw 301 is in contact with the inner wall of the shell 1. The limiting ring 311 is away from the hollow screw 3 A rotating block 307 is fixed on one side of 01, and the side of the rotating block 307 away from the limiting ring 311 slides with the limiting shell 303. A circular hole 2 309 is opened in the middle of the rotating block 307. The inner wall diameter of the hollow screw 301 and the diameter of the circular hole 2 309 are consistent with the diameter of the anchor hole 1 7, which is used to insert the steel wire rope 12. A plurality of limiting holes 312 are opened on one side of the rotating block 307 on the outer circumference of the anchor hole 2 9. The limiting holes 312 are arc-shaped as a whole, which are used to guide the slide rod 2 305 and provide a slideway.

[0037] After the first screw rod 306 is in the state of being rotated, the first screw rod 306 is in the state of being rotated.

[0038] The side of the limiting shell 303 away from the rotating block 307 is provided with a hole that is consistent in position, size and shape with the limiting hole 312 and the second circular hole 309. The rotating block 307 is close to the side of the limiting shell 303 and is circumferentially distributed with multiple middle clips 304 (the shape of the middle clip 304 is as shown in FIG. Figure 10 As shown), it is used to axially clamp the steel strand 12 that passes through the second circular hole 309 to prevent the steel strand 12 from shrinking after tensioning. Both ends of the middle clamp 304 are fixed with a second slide bar 305. The second slide bar 305 slides in the limiting hole 312 and the hole on the side of the limiting shell 303 away from the rotating block 307. A plurality of through holes 308 are opened on the outer circumference of the limiting shell 303 near the end of the rotating block 307. The outer fixed sleeve of the limiting shell 303 is provided with a fixing seat 10. The fixing seat 10 is a hollow hexahedron (as shown). Figure 11 shown).

[0039] When the steel strand 12 needs to be released, the gear nut 2 302 is rotated in the opposite direction to make the middle clip 304 leave the steel strand 12 , thereby releasing the steel strand 12 .

[0040] A guide hole 11 is provided at the outer hexagonal portion of the fixing seat 10. The shape and size of the guide hole 11 are consistent with the through hole 308, and the guide hole 11 and the through hole 308 are intersected and overlapped, so that the metal-based repair agent can flow into the interior of the limit shell 303. The bottom end of the clamping block 204 is in contact with one side of the fixing seat 10, and the clamping block 204 slides on one side of the fixing seat 10. The side of the fixing seat 10 away from the shell 1 is fixed to the side of the shell 2 6 facing the shell 1. The middle threaded sleeve of the hollow screw 301 is provided with a gear nut. 2 302, gear nut 2 302 is located on the outside of shell 1, and the side of gear nut 2 302 close to shell 1 is in contact with the outside of shell 1, and a threaded rubber ring 2 310 is fixed on the side of gear nut 2 302 facing away from the limiting ring 311. The material and inner ring texture of threaded rubber ring 2 310 are consistent with those of threaded rubber ring 1 208, and threaded rubber ring 2 310 is threadedly sleeved on the hollow screw 301; the gear teeth on the surface of gear nut 2 302 are meshed with the gear teeth on the surface of multiple gear nuts 1 203.

[0041] The metal-based repair agent flows into the interior of the limiting shell 303 through the guide hole 11 at the hexagonal position outside the fixing seat 10. Since the guide hole 11 and the through hole 308 on the limiting shell 303 are intersected and overlapped, the metal-based repair agent can smoothly enter the interior of the limiting shell 303 to fill and fix the gap between the inside of the clamping mechanism 3 and the steel strand 12.

[0042] This device is suitable for tensioning force ≤ 600kN and steel strand diameter φ15.2mm or φ12.7mm.

[0043] The implementation principle of a prestressed tensioning anchor in the embodiment of the present application is as follows: after the steel strand 12 is inserted into the bolt hole 8, the anchor hole 17 and the circular groove 13, the steel strand 12 is tensioned by a tensioning device such as a jack, and the spur gear 5 is engaged with the gear nut 1 203. The spur gear 5 is driven to drive the gear nut 1 203 and the gear nut 2 302 to rotate, so that the outer ring clamp 206 and the middle clamp 304 are moved to firmly fix the steel strand 12. After the tensioning device such as the jack is removed, the steel strand 12 drives the outer ring clamp 206 and the middle clamp 304 to move. The upper clip 304 is moved toward the circular groove 13 to achieve further stabilization. When the steel strand 12 needs to be released, the spur gear 5 can be rotated in the opposite direction. After the fixation is completed, a metal-based repair agent is injected into the grouting hole 14. The metal-based repair agent flows through the through hole three 214, the through hole two 213, the through hole one 212, the through hole four 308 and the guide hole 11 to fill the gaps between the fixing mechanism 2, the clamping mechanism 3, the steel strand 12 and the shell one 1. Then the spur gear 5 is removed and the gap between the gear nut one 203 and the shell one 1 is welded.

[0044] The above are merely optional embodiments of the present application and are not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A prestressed tension anchor, characterized in that: The invention comprises a shell (1), wherein the middle portion of the shell (1) is provided with an anchor hole (9) for passing through the middle steel strand (12), the outer ring of the shell (1) is provided with a plurality of anchor holes (7) and bolt holes (8) for passing through the outer steel strand (12), a clamping mechanism (3) for fixing the middle steel strand (12) passing through the anchor hole (9) is rotatably provided in the middle portion of one side of the shell (1), and the shell (1) is provided with a plurality of fixing mechanisms (2) for fixing the outer steel strand (12) passing through the anchor hole (7) at positions corresponding to the bolt holes (8); a spur gear (5) is movably provided on one side of the shell (1), a shell (6) is fixedly provided on the side of the shell (1) away from the spur gear (5), the shell (1) and the shell (6) together constitute an anchor body, and the shell (1) is provided with a grouting hole (14) for injecting a metal-based repairing agent at one anchor hole (7); The fixing mechanism (2) includes a screw (201) passing through a bolt hole (8) and a turntable (202) fixed to the end of the screw (201); a gear nut (203) for driving the screw (201) to rotate is provided on a threaded sleeve in the middle of the screw (201); a clamping block (204) with a flattened bevel at the bottom end is symmetrically slidably provided on one side of the turntable (202) away from the screw (201); a fixing block (205) is symmetrically fixed to the top of the two clamping blocks (204); an outer ring clamping piece (206) with a conical inner wall is symmetrically fixed to the upper end of the opposite side of the two fixing blocks (205); and the two outer ring clamping pieces (206) form a complete circular hole after being clamped; The clamping mechanism (3) comprises a hollow screw (301) coaxially connected and passing through the housing (1) and a limiting ring (311) fixed at one end of the hollow screw (301); a rotating block (307) is fixed on the side of the limiting ring (311) away from the hollow screw (301); the side of the rotating block (307) away from the limiting ring (311) is slidably matched with the limiting shell (303); a plurality of radially slidable middle clips (304) with conical inner walls are distributed on the circumference of the end face of the rotating block (307) close to the limiting shell (303); the plurality of middle clips (304) are synchronously contracted toward the center of the circle, and the middle clips (304) are tightened under the action of the tension force; the threaded sleeve of the hollow screw (301) is provided with a gear nut (302) and a threaded rubber ring (310) for rotational drive and self-locking.

2. A prestressed tension anchor according to claim 1, characterized in that: A threaded rubber ring (208) is fixedly provided on the side of the gear nut (203) facing away from the turntable (202) and is threadedly sleeved on the screw rod (201).

3. The prestressed tension anchor according to claim 1, characterized in that: A sliding groove (211) is symmetrically provided on one side of the turntable (202) close to the clamping block (204), and a sliding rod (207) is fixed on the lower end of the side of the clamping block (204) close to the turntable (202) and slides inside the sliding groove (211).

4. The prestressed tension anchor according to claim 1, characterized in that: The second gear nut (302) is threadedly sleeved on the middle part of the hollow screw (301), and the side of the second gear nut (302) facing away from the limiting ring (311) is fixed to the second threaded rubber ring (310).

5. The prestressed tension anchor according to claim 1, characterized in that: A plurality of limiting holes (312) are circumferentially provided on both sides of the limiting shell (303), and two ends of the middle clip (304) are fixed with a second sliding rod (305) that slides in the rotating block (307).

6. The prestressed tension anchor according to claim 1, characterized in that: The outer fixing sleeve of the limiting shell (303) is provided with a fixing seat (10).

7. The prestressed tension anchor according to claim 1, characterized in that: A plurality of steel strands (12) are movably passed through the middle and outer ring of the shell (1).

8. The prestressed tension anchor according to claim 1, characterized in that: The plurality of steel strands (12) are sequentially passed through the anchor hole 1 (7), the bolt hole (8) and the circular groove (13), and the gear nut 1 (203) and the gear nut 2 (302) are driven to rotate by rotating the spur gear (5), thereby driving the screw rod (201) and the hollow screw rod (301) to fix the steel strands (12) with the outer ring clip (206) and the middle clip (304), and then the spur gear (5) is further rotated to further tighten.

9. The prestressed tension anchor according to claim 2, characterized in that: Secondly, the gear nut 1 (203) is engaged with the spur gear (5), and a fixing rod (4) is provided in the middle of the spur gear (5) so as to be movable and penetrated.

10. The prestressed tension anchor according to claim 8, characterized in that: The grouting hole (14), through hole three (214), through hole two (213), and through hole one (212) are interconnected, and the outer ring clamp (206) injects a metal-based repair agent into the grouting hole (14) after stably fixing the steel strand (12), so that the gap between the internal structure of the fixing mechanism (2) and the steel strand (12) and the shell one (1) is filled and fixed.

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