A prestressed anchor for highway bridge construction

Abstract

The present invention relates to the technical field of prestressed anchor devices, and discloses a prestressed anchor device for highway bridge construction, including an internal gear ring and end plates. The number of the end plates is two, and the two end plates are respectively located on the front and rear surfaces of the internal gear ring. Ring grooves are formed on both the front surface and the rear surface of the internal gear ring. Sliders are symmetrically and fixedly arranged on the opposite sides of the two end plates. The sliders are located inside the ring grooves and are slidably connected to the ring grooves. When the present invention is in use, the steel bars are passed through a plurality of sockets, and then the internal gear ring is rotated, so that the steel bars can be fixed in the sockets, thereby achieving the anchoring effect. When it is necessary to disassemble the anchor device, the pressing rod is directly pressed. At this time, under the action of the reset gear, the internal gear ring rotates in the reverse direction, and the anchor device can be disassembled from the tensioned steel bars. Compared with the traditional prestressed anchor device, the installation and disassembly of this anchor device are more convenient and fast, and it is more convenient for construction workers to operate and use.

Description

Technical Field

[0001] The present invention relates to the technical field of prestressed anchors, and specifically to a prestressed anchor for highway bridge construction. Background Art

[0002] A prestressed anchor refers to a permanent anchoring device used in prestressed concrete, and is an anchoring tool in a post-tensioned structure or component to maintain the tension of the prestressed tendon and transfer it to the interior of the concrete. Prestressed anchors are widely used in the construction of highway bridges. During the use of traditional prestressed anchors, a backing plate is first installed, then the anchor is installed, wedges are inserted into the holes of the anchor, and then a retaining plate is installed on the anchor. Finally, a jack is used to tension the steel bars, thereby generating prestress in the steel bars.

[0003] This causes traditional prestressed anchors to be time-consuming and laborious during use, inconvenient for quickly installing and anchoring the prestressed anchor on the steel bars, and also inconvenient for operators to quickly remove the anchor from the steel bars when disassembling the anchor from the steel bars, bringing inconvenience to the construction and indirectly increasing the construction progress. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a prestressed anchor for highway bridge construction, which solves the problems existing in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A prestressed anchor for highway bridge construction, including an internal gear ring and end plates. The number of the end plates is two, and the two end plates are respectively located on the front and rear surfaces of the internal gear ring. Ring grooves are provided on both the front surface and the rear surface of the internal gear ring. On the opposite sides of the two end plates, sliders are symmetrically fixed. The sliders are located inside the ring grooves and are slidably connected to the ring grooves. A plurality of sockets are annularly and arrayedly distributed inside the internal gear ring. The front and rear ends of the sockets are respectively located on the opposite sides of the two end plates, and the sockets are fixedly connected to the end plates. A gear cylinder is sleeved inside the internal gear ring on the outside of the socket. The front and rear ends of the gear cylinder are respectively rotatably connected to the opposite sides of the two end plates, and the gear cylinder is meshed with the internal gear ring. Two protrusions are fixedly provided on the inner side wall of the gear cylinder in the counterclockwise direction. Inside the socket, pressing pieces are symmetrically provided. At the centers of the opposite sides of the two pressing pieces, movable rods are fixedly provided. The ends of the movable rods away from the pressing pieces penetrate through the side walls of the sockets and extend into the inside of the gear cylinder. A first spring is fixedly provided between the pressing piece and the socket. The first spring is sleeved on the outside of the movable rod. An outer cylinder I is provided in the middle of the internal gear ring. The front and rear ends of the outer cylinder I are respectively fixedly connected to the opposite sides of the two end plates. An activity disk is provided inside the outer cylinder I. A second spring is fixedly provided on the rear surface of the activity disk. The rear end of the second spring is fixedly connected to the rear surface inside the outer cylinder I. At the center of the front surface of the activity disk, a pressing rod is fixedly provided. The front end of the pressing rod extends to the front of the front end plate. On the outer side wall of the activity disk, first connection ports are symmetrically provided. On the outer side wall of the outer cylinder I, installation ports are symmetrically provided. Inside the two installation ports, connecting rods are rotatably connected. Inside the internal gear ring, two telescopic rods are provided in the counterclockwise direction. At the opposite ends of the two telescopic rods, second connection ports are integrally formed. The two ends of the connecting rod are respectively located inside the first connection port and the second connection port and are respectively rotatably connected to the first connection port and the second connection port. A limiting sleeve is slidably connected to the outer side wall of the telescopic rod. The outer wall of the limiting sleeve is fixedly connected to the opposite sides of the two end plates. The end of the telescopic rod away from the outer cylinder I is integrally formed with a U-shaped connecting piece. Inside the U-shaped connecting piece, an L-shaped clamping piece is rotatably connected through a torsion spring. The end of the vertical part of the clamping piece is engaged with the internal gear ring, and the end of the horizontal part is attached to the telescopic rod.

[0006] As a further solution of the present utility model: The vertical cross-sections of the slider and the ring groove are both T-shaped structures.

[0007] As a further solution of the present utility model: Ball bearings are embedded at the top, bottom and the side away from the end plate of the slider. The outer side walls of the ball bearings are attached to the inner side walls of the ring grooves.

[0008] As a further solution of the present utility model: Two U-shaped frames are fixedly arranged on the outer side wall of the internal gear ring in the counterclockwise direction. Bushings are rotatably connected inside both of the two U-shaped frames. The opening of one of the bushings faces right, and the opening of the other bushing faces left.

[0009] As a further solution of the present utility model: The extrusion sheet is of an arc-shaped structure, and a rubber sheet is fixedly arranged on the inner side wall of the extrusion sheet.

[0010] As a further solution of the present utility model: An outer ring is fixedly arranged on the front surface of the front end plate. The depth of the outer ring is greater than the length of the pressing rod protruding from the front end plate. A backing plate is fixedly arranged on the rear surface of the rear end plate. The rear end of the socket extends to the rear surface of the backing plate.

[0011] As a further solution of the present utility model: Reset gears are symmetrically arranged inside the internal gear ring. The front and rear ends of the two reset gears are respectively rotatably connected to the opposite sides of the two end plates. Fixing rods are arranged in the middle of the two reset gears. The two ends of the two fixing rods are respectively fixedly connected to the opposite sides of the two end plates. A hairspring is fixedly arranged on the outer side wall of the fixing rod. The end of the hairspring away from the fixing rod is fixedly connected to the inner wall of the reset gear.

[0012] As a further solution of the present utility model: Outer cylinders II are fixedly arranged at the upper right corner and the lower left corner of the front surface of the backing plate. Inner cylinders are integrally formed inside the outer cylinders II. A sealing piston is movably connected inside the inner cylinders. The space between the inner cylinders and the sealing piston is filled with non-Newtonian fluid. A top rod is fixedly arranged in the middle of the front end of the sealing piston. The front end of the top rod extends to the front of the outer ring. An air cushion is fixedly arranged on the rear surface of the backing plate. An inlet and outlet is fixedly arranged at the rear end of the outer cylinder II. The rear end of the inlet and outlet communicates with the inside of the air cushion. Guide pipes are fixedly arranged at the top and bottom of the inlet and outlet. The ends of the two guide pipes away from the inlet and outlet communicate with the inside of the outer cylinder II, and both of the two guide pipes are embedded in the backing plate.

[0013] As a further solution of the present utility model: A third spring is sleeved on the outer side wall of the top rod. The rear end of the third spring is fixedly connected to the front end of the sealing piston, and its front end is fixedly connected to the front end inside the outer cylinder II.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) When the present invention is in use, the steel bar is passed through a plurality of sockets, and then the internal gear ring is rotated, so that the steel bar can be fixed in the sockets, thereby realizing the anchoring function. When it is necessary to disassemble the anchor, the pressing rod is directly pressed. At this time, under the action of the reset gear, the internal gear ring rotates in the reverse direction, and the anchor can be disassembled from the tensioned steel bar. Compared with the traditional prestressed anchor, the installation and disassembly of this anchor are more convenient and faster, and it is more convenient for construction workers to operate.

[0016] (2) When the present invention is in use, after the anchor is anchored on the steel bar, the jack is directly applied to the anchor, and then the jack is started to tension the steel bar. Compared with the traditional anchor, this anchor does not require the complicated operations of the traditional anchor. While improving the efficiency of the steel bar tensioning operation, it also makes it more convenient and fast for construction workers to tension the steel bar, greatly shortening the construction progress of the steel bar tensioning operation.

[0017] (3) The present invention rotatably connects the shaft sleeve through the U-shaped frame on the outer wall of the internal gear ring. When installing this anchor, the output shaft of the hydraulic rod or the electric push rod is inserted into the shaft sleeve, and then after starting the hydraulic rod or the electric push rod, the internal gear ring can be driven to rotate, thereby realizing the installation and anchoring. Or directly push the U-shaped frame and the shaft sleeve by hand to make the internal gear ring rotate to realize the installation and anchoring of the anchor, which is more convenient for construction workers to operate.

[0018] (4) When the present invention tensions the steel bar through the jack, the air cushion at the rear of the backing plate will expand at this time, so as to form a protective isolation layer between the backing plate and the concrete block. The large-area backing plate can reduce the pressure acting on the concrete block, and at the same time, the expanded air cushion can avoid the situation that the backing plate damages the concrete block. The mutual cooperation between the two can avoid the situation that the concrete block is damaged when the jack tensions the steel bar, thereby reducing the strength of the entire local area. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic internal structure diagram of the internal gear ring in the present invention;

[0021] Figure 3 is a schematic side-sectional structure diagram of the present invention;

[0022] Figure 4 is a schematic internal structure diagram of the outer cylinder in the present invention.

[0023] Figure 5 is a schematic internal structure diagram of the outer cylinder of the present invention.

[0024] In the figure: 1. Outer ring; 2. Socket; 3. Extrusion piece; 4. Rubber piece; 5. End plate; 6. Cushion plate; 7. U-shaped frame; 8. Bush; 9. Internal gear ring; 10. Pressing rod; 11. Ring groove; 12. Tooth cylinder; 13. Protrusion; 14. Fastening piece; 15. U-shaped connecting piece; 16. Slide block; 17. Movable rod; 18. First spring; 19. Telescopic rod; 20. Limit sleeve; 21. First outer cylinder; 22. Movable disc; 23. Installation opening; 24. Ball; 25. Second spring; 26. Second connection port; 27. Connecting rod; 28. First connection port; 29. Reset gear; 30. Hairspring; 31. Fixed rod; 32. Second outer cylinder; 33. Air cushion; 34. Jacking rod; 35. Third spring; 36. Sealing piston; 37. Inlet and outlet; 38. Inner cylinder; 39. Conduit. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] As Figures 1-5 shown, the present invention provides a technical solution: a prestressed anchor for highway bridge construction, including an internal gear ring 9 and an end plate 5. The number of end plates 5 is two, and the two end plates 5 are respectively located on the front and rear surfaces of the internal gear ring 9. Ring grooves 11 are provided on both the front and rear surfaces of the internal gear ring 9. Symmetrically fixed on the opposite sides of the two end plates 5 are slide blocks 16. The slide blocks 16 are located inside the ring grooves 11 and are slidably connected to the ring grooves 11. The vertical cross-sections of the slide blocks 16 and the ring grooves 11 are both T-shaped structures. Ball bearings 24 are embedded in the top, bottom, and the side away from the end plate 5 of the slide block 16. The outer side walls of the ball bearings 24 are in contact with the inner side walls of the ring grooves 11, which prevents the end plate 5 from separating from the internal gear ring 9 and at the same time facilitates the smoother rotation of the internal gear ring 9 between the two end plates 5. Two U-shaped frames 7 are fixedly arranged along the counterclockwise direction on the outer side wall of the internal gear ring 9. Rotatably connected inside the two U-shaped frames 7 are bushings 8. The opening of one bushing 8 faces right, and the opening of the other bushing 8 faces left. When installing this anchor, insert the output shaft of a hydraulic rod or an electric push rod into the bushing 8, and then start the hydraulic rod or the electric push rod to drive the internal gear ring 9 to rotate, thereby realizing installation and anchoring. Or directly push the U-shaped frame 7 and the bushing 8 by hand to make the internal gear ring 9 rotate to realize the installation and anchoring of the anchor, which is more convenient for construction workers to operate and use;

[0027] Further, a plurality of sockets 2 are distributed in an internal annular array of the internal gear ring 9. The front and rear ends of the socket 2 are respectively located on the opposite sides of the two end plates 5, and the socket 2 is fixedly connected to the end plate 5. A gear cylinder 12 is sleeved inside the internal gear ring 9 on the outer side of the socket 2. The front and rear ends of the gear cylinder 12 are respectively rotatably connected to the opposite sides of the two end plates 5, and the gear cylinder 12 meshes with the internal gear ring 9. Two protrusions 13 are fixedly arranged on the inner side wall of the gear cylinder 12 in the counterclockwise direction. Extrusion sheets 3 are symmetrically arranged inside the socket 2. The extrusion sheet 3 is of an arc structure, and a rubber sheet 4 is fixedly arranged on the inner side wall of the extrusion sheet 3. The steel bar can be clamped by the extrusion sheet 3, and at the same time, the friction force between the extrusion sheet 3 and the steel bar can be increased by cooperating with the rubber sheet 4, and the steel bar is further fixed. Moving rods 17 are fixedly arranged at the centers of the opposite sides of the two extrusion sheets 3. One end of the moving rod 17 away from the extrusion sheet 3 penetrates through the side wall of the socket 2 and extends into the interior of the gear cylinder 12. A first spring 18 is fixedly arranged between the extrusion sheet 3 and the socket 2, and the first spring 18 is sleeved on the outer side of the moving rod 17;

[0028] Further, an outer cylinder one 21 is arranged in the middle of the internal gear ring 9. The front and rear ends of the outer cylinder one 21 are respectively fixedly connected to the opposite sides of the two end plates 5. An activity disk 22 is arranged inside the outer cylinder one 21. A second spring 25 is fixedly arranged on the rear surface of the activity disk 22. The rear end of the second spring 25 is fixedly connected to the rear inner surface of the outer cylinder one 21. A pressing rod 10 is fixedly arranged at the center of the front surface of the activity disk 22. The front end of the pressing rod 10 extends to the front of the front end plate 5. First connection ports 28 are symmetrically arranged on the outer side wall of the activity disk 22. Mounting ports 23 are symmetrically arranged on the outer side wall of the outer cylinder one 21. Connecting rods 27 are respectively rotatably connected to the interiors of the two mounting ports 23. Two telescopic rods 19 are arranged inside the internal gear ring 9 in the counterclockwise direction. Second connection ports 26 are integrally formed at the opposite ends of the two telescopic rods 19. The two ends of the connecting rod 27 are respectively located inside the first connection port 28 and the second connection port 26 and are respectively rotatably connected to the first connection port 28 and the second connection port 26. A limiting sleeve 20 is slidably connected to the outer side wall of the telescopic rod 19. The outer wall of the limiting sleeve 20 is fixedly connected to the opposite sides of the two end plates 5. A U-shaped connecting piece 15 is integrally formed at one end of the telescopic rod 19 away from the outer cylinder one 21. A clamping piece 14 with an L-shaped structure is rotatably connected inside the U-shaped connecting piece 15 through a torsion spring. The end of the vertical part of the clamping piece 14 is engaged with the internal gear ring 9, and the end of the horizontal part is attached to the telescopic rod 19. An outer ring 1 is fixedly arranged on the front surface of the front end plate 5. The depth of the outer ring 1 is greater than the length of the pressing rod 10 exposed from the front end plate 5. A backing plate 6 is fixedly arranged on the rear surface of the rear end plate 5. The rear end of the socket 2 extends to the rear surface of the backing plate 6;

[0029] Further, after the anchor is installed, the jack is directly applied to the outer ring 1, and another such anchor is fixed to the steel bar at the same time. Then, the output shaft of the jack acts on the backing plate 6. In this way, there is no need for complicated installation operations, making the operation more simple and fast. Inside the internal gear ring 9, reset gears 29 are symmetrically arranged. The front and rear ends of the two reset gears 29 are respectively rotatably connected to the opposite sides of the two end plates 5. Fixed rods 31 are arranged in the middle of the two reset gears 29. The two ends of the two fixed rods 31 are respectively fixedly connected to the opposite sides of the two end plates 5. A hairspring 30 is fixed to the outer side wall of the fixed rod 31. The end of the hairspring 30 away from the fixed rod 31 is fixedly connected to the inner wall of the reset gear 29. When installing and anchoring the anchor, at this time, when the internal gear ring 9 rotates counterclockwise, it will drive the reset gear 29 to rotate counterclockwise, so that the internal hairspring 30 starts to deform and store energy. When disassembling the anchor, after pressing the pressing rod 10, at this time, the internal gear ring 9 is not restricted by the clamping member 14. Under the action of the hairspring 30, it will drive the reset gear 29 to rotate clockwise, thereby driving the internal gear ring 9 to rotate clockwise, and then the entire anchor can be disassembled from the steel bar.

[0030] Further, outer cylinders II 32 are fixed to the upper right corner and the lower left corner of the front surface of the backing plate 6. An inner cylinder 38 is integrally formed inside the outer cylinder II 32. A sealing piston 36 is movably connected inside the inner cylinder 38. The space between the inner cylinder 38 and the sealing piston 36 is filled with non-Newtonian fluid. A push rod 34 is fixed to the middle of the front end of the sealing piston 36. The front end of the push rod 34 extends to the front of the outer ring 1. A third spring 35 is sleeved on the outer side wall of the push rod 34. The rear end of the third spring 35 is fixedly connected to the front end of the sealing piston 36, and its front end is fixedly connected to the front end inside the outer cylinder II 32. An air cushion 33 is fixed to the rear surface of the backing plate 6. An inlet and outlet 37 is fixed to the rear end of the outer cylinder II 32. The rear end of the inlet and outlet 37 communicates with the inside of the air cushion 33, and guide pipes 39 are fixed to the top and bottom of the inlet and outlet 37. The ends of the two guide pipes 39 away from the inlet and outlet 37 communicate with the inside of the outer cylinder II 32, and the two guide pipes 39 are both embedded in the backing plate 6.

[0031] Further, when the jack acts between the outer ring 1 and another anchor to tension the steel bar, the ejector rod 34 will move inward into the inner cylinder 38 at this time, which will push the sealing piston 36 to move backward, so that the non-Newtonian fluid in the inner cylinder 38 can be pushed into the air cushion 33 through the inlet and outlet 37. At the same time, because the inlet and outlet 37 has a structure that is wide at both ends and narrow in the middle, when the non-Newtonian fluid quickly passes through the inlet and outlet 37, the pressure at the narrow middle part becomes smaller at this time, and the gas in the outer cylinder II 32 will enter the inlet and outlet 37 through the conduit, so as to enter the air cushion 33 together with the non-Newtonian fluid, so that the air cushion 33 can expand. At this time, because the large-area backing plate 6 can reduce the pressure acting on the concrete block, and the expanded air cushion 33 can form a protective isolation layer between the backing plate 6 and the concrete block. The gas in the air cushion 33 cooperates with the non-Newtonian fluid to make the protective isolation layer have the functions of high pressure resistance and buffering and shock absorption, so as to further protect the concrete block and avoid damage to the concrete block during the tensioning of the steel bar. When the jack is removed after the tensioning is completed, at this time, under the action of the third spring 35, the ejector rod 34 and the sealing piston 36 return to their positions, and at the same time, the non-Newtonian fluid and air in the air cushion 33 will be drawn into the inner cylinder 38, and part of the air will enter the outer cylinder II 32 again, so that the air cushion shrinks and fits on the rear wall of the backing plate 6.

[0032] In summary, the working process of the present invention is as follows: When in use, pass the steel bar through multiple sockets 2, then insert the output shafts of two hydraulic rods or electric push rods into two bushings 8 respectively, and then start the hydraulic rod or electric push rod. At this time, the internal gear ring 9 rotates counterclockwise, and at this time, the clamping member 14 will not affect the rotation of the internal gear ring 9. When the internal gear ring 9 wants to rotate clockwise, at this time, because the clamping member 14 is in contact with the telescopic rod 19, it will prevent the internal gear ring 9 from rotating clockwise, avoiding the loosening of the anchor. The multiple tooth cylinders 12 and the reset gear 29 inside will rotate counterclockwise accordingly. As the reset gear 29 rotates, the clock spring 30 inside will deform and store energy. At the same time, as the tooth cylinder 12 rotates, the protrusion 13 will gradually approach the movable rod 17 and squeeze the movable rod 17, so that the two pressing pieces 3 in the same socket 2 approach each other, and finally the two pressing pieces 3 closely fit on the outer wall of the steel bar. Together with the rubber pieces 4 on the pressing pieces 3, the steel bar can be anchored in the socket 2. After the anchor is installed and anchored, apply the jack to the outer ring 1, pass the steel bar through the jack, then anchor another identical anchor on the steel bar through the above operations, and at the same time make the output shaft of the jack act on the backing plate 6 of another anchor, and then start the jack to realize the tensioning of the steel bar, so that the steel bar generates prestress; after the tensioning is completed, then press the pressing rod 10 on another anchor to move the movable disk 22 backward, and drive the telescopic rod 19 to retract under the action of the connecting rod 27. At this time, the clamping member 14 is disengaged from the internal gear ring. At this time, under the action of the clock spring 30, it will drive the reset gear 29 to rotate clockwise and drive the internal gear ring 9 to rotate clockwise. At this time, the multiple tooth cylinders 12 inside will rotate clockwise accordingly, so that the protrusion 13 gradually moves away from the movable rod 17, and under the action of the first spring 18, the two pressing pieces 3 move away from each other to release the steel bar. At this time, release the pressing rod 10, and under the action of the second spring 25, the movable disk 22 moves back to make the clamping member 14 engage with the internal gear ring 9 again, and then remove another anchor from the steel bar, then remove the jack from the steel bar, wait for a period of time, and then remove the first installed anchor from the steel bar through the above operations.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prestressed anchor for highway bridge construction, comprising an internal gear ring (9) and an end plate (5), characterized in that, The number of the end plates (5) is two, and the two end plates (5) are respectively located on the front and rear surfaces of the internal gear ring (9). Ring grooves (11) are formed on both the front surface and the rear surface of the internal gear ring (9). Symmetrically fixed on the opposite sides of the two end plates (5) are sliding blocks (16). The sliding blocks (16) are located inside the ring grooves (11) and are slidably connected to the ring grooves (11). A plurality of sockets (2) are distributed in an annular array inside the internal gear ring (9). The front and rear ends of the sockets (2) are respectively located on the opposite sides of the two end plates (5), and the sockets (2) are fixedly connected to the end plates (5). A gear cylinder (12) is sleeved inside the internal gear ring (9) on the outer side of the sockets (2). The front and rear ends of the gear cylinder (12) are respectively rotatably connected to the opposite sides of the two end plates (5), and the gear cylinder (12) is meshed with the internal gear ring (9). Two protrusions (13) are fixedly arranged on the inner side wall of the gear cylinder (12) in the counterclockwise direction. Symmetrically arranged inside the sockets (2) are pressing pieces (3). Fixed at the centers of the opposite sides of the two pressing pieces (3) are movable rods (17). One end of the movable rod (17) far from the pressing piece (3) penetrates through the side wall of the socket (2) and extends into the inside of the gear cylinder (12). A first spring (18) is fixed between the pressing piece (3) and the socket (2). The first spring (18) is sleeved on the outer side of the movable rod (17). A first outer cylinder (21) is arranged in the middle of the internal gear ring (9). The front and rear ends of the first outer cylinder (21) are respectively fixedly connected to the opposite sides of the two end plates (5). Arranged inside the first outer cylinder (21) is a movable disk (22). Fixed on the rear surface of the movable disk (22) is a second spring (25). The rear end of the second spring (25) is fixedly connected to the rear inner surface of the first outer cylinder (21). Fixed at the center of the front surface of the movable disk (22) is a pressing rod (10). The front end of the pressing rod (10) extends to the front of the front end plate (5). The outer side wall of the movable disk (22) is symmetrically provided with first connection ports (28), the outer side wall of the first outer cylinder (21) is symmetrically provided with mounting ports (23), two connecting rods (27) are rotatably connected inside the two mounting ports (23), two telescopic rods (19) are arranged inside the internal gear ring (9) in the counterclockwise direction, second connection ports (26) are integrally formed at the opposite ends of the two telescopic rods (19), the two ends of the connecting rod (27) are respectively located inside the first connection port (28) and the second connection port (26), and are respectively rotatably connected with the first connection port (28) and the second connection port (26), a limiting sleeve (20) is slidably connected to the outer side wall of the telescopic rod (19), the outer wall of the limiting sleeve (20) is fixedly connected to the opposite sides of the two end plates (5), a U-shaped connecting piece (15) is integrally formed at one end of the telescopic rod (19) away from the first outer cylinder (21), a L-shaped clamping piece (14) is rotatably connected inside the U-shaped connecting piece (15) through a torsion spring, the end of the vertical part of the clamping piece (14) is engaged with the internal gear ring (9), and the end of the horizontal part is attached to the telescopic rod (19).

2. The prestressed anchor for highway bridge construction according to claim 1, characterized in that: The vertical cross-sections of the slider (16) and the annular groove (11) are both T-shaped structures.

3. The prestressed anchor for highway bridge construction according to claim 1, characterized in that: Ball bearings (24) are embedded in the top, bottom and the side away from the end plate (5) of the slider (16), and the outer side wall of the ball bearings (24) is attached to the inner side wall of the annular groove (11).

4. The prestressed anchor for highway bridge construction according to claim 1, characterized in that: Two U-shaped frames (7) are fixedly arranged on the outer side wall of the internal gear ring (9) in the counterclockwise direction, and bushings (8) are rotatably connected inside the two U-shaped frames (7), the opening of one of the bushings (8) faces right, and the opening of the other bushing (8) faces left.

5. The prestressed anchor for highway bridge construction according to claim 1, characterized in that: The extrusion piece (3) is of an arc-shaped structure, and a rubber piece (4) is fixedly arranged on the inner side wall of the extrusion piece (3).

6. The prestressed anchor for highway bridge construction according to claim 1, characterized in that: An outer ring (1) is fixedly arranged on the front surface of the front end plate (5), the depth of the outer ring (1) is greater than the length of the pressing rod (10) exposed from the front end plate (5), a backing plate (6) is fixedly arranged on the rear surface of the rear end plate (5), and the rear end of the socket (2) extends to the rear surface of the backing plate (6).

7. The prestressed anchor for highway bridge construction according to claim 1, characterized in that: Two reset gears (29) are symmetrically arranged inside the internal gear ring (9), the front and rear ends of the two reset gears (29) are respectively rotatably connected to the opposite sides of the two end plates (5), fixing rods (31) are arranged in the middle of the two reset gears (29), the two ends of the two fixing rods (31) are respectively fixedly connected to the opposite sides of the two end plates (5), a clockwork spring (30) is fixedly arranged on the outer side wall of the fixing rod (31), and the end of the clockwork spring (30) away from the fixing rod (31) is fixedly connected to the inner wall of the reset gear (29).

8. The prestressed anchor for highway bridge construction according to claim 6, characterized in that: On the upper right corner and the lower left corner of the front surface of the backing plate (6), outer cylinders II (32) are fixed. An inner cylinder (38) is integrally formed inside the outer cylinder II (32). A sealing piston (36) is movably connected inside the inner cylinder (38). The space between the inner cylinder (38) and the sealing piston (36) is filled with non-Newtonian fluid. In the middle of the front end of the sealing piston (36), a push rod (34) is fixed. The front end of the push rod (34) extends to the front of the outer ring (1). An air cushion (33) is fixed on the rear surface of the backing plate (6). An inlet and outlet (37) is fixed at the rear end of the outer cylinder II (32). The rear end of the inlet and outlet (37) communicates with the inside of the air cushion (33). At the top and bottom of the inlet and outlet (37), conduits (39) are fixed. One ends of the two conduits (39) far from the inlet and outlet (37) communicate with the inside of the outer cylinder II (32). The two conduits (39) are both embedded inside the backing plate (6).

9. The prestressed anchor for highway bridge construction according to claim 8, characterized in that: A third spring (35) is sleeved on the outer side wall of the push rod (34). The rear end of the third spring (35) is fixedly connected with the front end of the sealing piston (36), and its front end is fixedly connected with the front end inside the outer cylinder II (32).

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