Anchoring device for prestressed tendons, easy to operate and to disengage

Abstract

The utility model relates to the technical field of anchorage device, and disclose a kind of easy to operate easily to retreat anchor prestressed anchorage device, including first splicing piece and three second splicing pieces, the surface of first splicing piece and second splicing piece is all set up with defect slot, the inside of first splicing piece and second splicing piece is all set up with movable slot and arc slot, movable slot and arc slot are communicated, the inside of arc slot set up in the inside of first splicing piece is slidably connected with first arc block, by the cooperation between first shaft body, first arc block, second shaft body, second arc block, first torsional spring, second torsional spring etc. Structure, when retreat anchor, need not the operation of jack, only need to use simple tool to rotate a driving block, each first splicing piece and second splicing piece can be separated, greatly reduce the operation step, save time and labour, also effectively improve work efficiency, reduce the technical requirement and equipment dependence to operator.

Description

Technical Field

[0001] This utility model relates to the field of anchorage technology, specifically to an easy-to-operate and easily retractable prestressed anchorage. Background Technology

[0002] Anchorages are permanent anchoring devices used in prestressed concrete. They are anchoring tools used in post-tensioned structures or components to maintain the tension of prestressing tendons and transfer it into the concrete. They are also called prestressed anchorages.

[0003] After the anchorage is used, it needs to be unanchored. This process requires safely and without damage removing the anchorage that is tightly clamped to the steel strand or rebar with huge clamping force. The operator needs to install a jack on the tensioned anchorage and ensure that the axis of the jack coincides with the axis of the prestressing tendon to prevent eccentric force from causing equipment damage or accidents. Then, the jack is slowly and steadily pressed. After the locking between the clamp and the steel strand is released by the jack, the operator needs to use a special tool or directly remove the clamp from the anchor hole one by one. The operation is quite cumbersome. In view of this, we propose an easy-to-operate and easy-to-unanchor prestressed anchorage to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an easy-to-operate and easily retractable prestressed anchorage, thus solving the problem of inconvenient operation of some existing prestressed anchorages.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an easy-to-operate and easily retractable prestressed anchorage, comprising a first splice and three second splices. Both the first and second splices have incomplete grooves on their surfaces. Both the first and second splices have movable grooves and arc-shaped grooves inside, which are connected. A first arc-shaped block is slidably connected inside the arc-shaped groove of the first splice. A first shaft is rotatably connected in the movable groove of the first splice, and a transmission assembly is provided outside the first shaft. A second shaft is rotatably connected in the movable groove of the second splices, and a connecting rod is fixedly sleeved on the outside of the second shaft. A second arc-shaped block is slidably connected in the arc-shaped groove of the second splice, and the second arc-shaped block and the connecting rod are fixedly connected. A groove is formed on the upper surface of the first splice, and a driving assembly is provided inside the groove.

[0006] Preferably, the transmission assembly includes a transmission gear, which is fixedly sleeved on the outside of the first shaft. The inner arc surface of the first arc block is provided with a tooth groove, and the first arc block is meshed with the transmission gear through the tooth groove.

[0007] Preferably, a first torsion spring is fixedly connected to both sides of the transmission gear, and the ends of the two first torsion springs that are far apart from each other are fixedly connected to the inner walls of the two sides of the movable groove, and the two first torsion springs are movably sleeved on the outside of the first shaft.

[0008] Preferably, a second torsion spring is fixedly connected to both sides of the connecting rod, and the opposite ends of the two second torsion springs are respectively fixedly connected to the inner walls of the two sides of the movable groove. The second torsion springs are movably sleeved on the outside of the second shaft.

[0009] Preferably, the driving assembly includes a driving block, which is movably fitted inside the groove. A driving rod is fixedly connected to the lower surface of the driving block, and the lower end of the driving rod movably penetrates into the interior of the movable groove. A positioning block is fixedly connected to the surface of the driving block. A fan-shaped groove is formed inside the groove, and two positioning grooves are formed on the top wall of the fan-shaped groove. The positioning grooves are adapted to the positioning blocks.

[0010] Preferably, the first shaft body has a movable chamber inside, the lower end of the drive rod slides through the interior of the movable chamber, the drive rod is slidably connected to the interior of the movable chamber by means of the cooperation of the slider and the groove, the lower end of the drive rod is fixedly connected to a return spring, and the other end of the return spring is fixedly connected to the inner wall of the movable chamber.

[0011] Preferably, the outer arc surface of the first arc block is provided with a slot, and the internal thread of the first splicing piece is connected with a locking bolt, the locking bolt being compatible with the slot.

[0012] Preferably, T-shaped guide blocks are fixedly connected to the surfaces of both the first and second splicing components, and T-shaped guide grooves are provided inside both the first and second splicing components, with the T-shaped guide blocks and T-shaped guide grooves being compatible.

[0013] Compared with the prior art, this utility model provides an easy-to-operate and easily retractable prestressed anchorage, which has the following beneficial effects:

[0014] 1. This easy-to-operate, easily removable prestressed anchorage, through the cooperation of the first shaft, first arc block, second shaft, second arc block, first torsion spring, and second torsion spring, eliminates the need for jacks during anchor removal. Simply use a simple tool to rotate a drive block to separate the first and second splice parts, greatly reducing the number of operation steps, saving time and effort, effectively improving work efficiency, and reducing the technical requirements for operators and equipment dependence.

[0015] 2. This easy-to-operate and easy-to-remove prestressed anchor can effectively lock the drive block in a designated position through the cooperation between the drive block, positioning block, positioning groove, fan-shaped groove, and return spring, preventing accidental rotation due to vibration or other reasons. At the same time, the cooperation between the locking bolt and the slot achieves secondary fixation of the core components. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a prestressed anchor that is easy to operate and easy to retract according to the present invention;

[0017] Figure 2 This is a structural schematic diagram of the first splicing component of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the first splicing component of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the second splicing component of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the first arc-shaped block of this utility model;

[0021] Figure 6 This is a cross-sectional view of the first shaft of the present invention;

[0022] Figure 7 This is a cross-sectional view of the groove structure of this utility model.

[0023] In the diagram: 1. First splicing component; 2. Second splicing component; 3. Incomplete groove; 4. Movable groove; 5. Arc-shaped groove; 6. First arc-shaped block; 7. First shaft; 8. First torsion spring; 9. Second arc-shaped block; 10. Second shaft; 11. Connecting rod; 12. Second torsion spring; 13. Transmission gear; 14. Tooth groove; 15. Movable chamber; 16. Drive rod; 17. Return spring; 18. Drive block; 19. Groove; 20. Fan-shaped groove; 21. Positioning groove; 22. Positioning block; 23. Slot; 24. Locking bolt; 25. T-shaped guide groove; 26. T-shaped guide block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-7This utility model provides a technical solution: an easy-to-operate and easily retractable prestressed anchor, comprising a first splice 1 and three second splice 2, which can be spliced ​​together to form the anchor body. Both the first splice 1 and the three second splice 2 have incomplete grooves 3 on their surfaces, and adjacent incomplete grooves 3 can be spliced ​​to form anchor holes. Corresponding clamps are provided inside the anchor holes. Since this is a conventional technique in the field, it will not be described in detail here. Both the first splice 1 and the second splice 2 have movable grooves 4 and arc-shaped grooves 5 inside for limiting the structural movement trajectory. The movable grooves 4 and arc-shaped grooves 5 are connected. The arc-shaped groove 5 inside the first splice 1 has internal sliding... The first splice 1 is rotatably connected to a first arc-shaped block 6 for locking each splice piece. A first shaft 7 for transmission and support is rotatably connected in a movable groove 4 inside the first splice piece 1. A transmission component is provided on the outside of the first shaft 7. A second shaft 10 for transmission and support is rotatably connected in a movable groove 4 inside the second splice 2. A connecting rod 11 for connection is fixedly sleeved on the outside of the second shaft 10. A second arc-shaped block 9 for locking each splice piece is slidably connected in a curved groove 5 inside the second splice 2. The second arc-shaped block 9 and the connecting rod 11 are fixedly connected. A groove 19 is provided on the upper surface of the first splice piece 1. A drive component is provided inside the groove 19.

[0026] The transmission assembly includes a transmission gear 13 for transmission. The transmission gear 13 is fixedly sleeved on the outside of the first shaft 7. The inner arc surface of the first arc block 6 is provided with a tooth groove 14 for cooperating with the transmission gear 13. The first arc block 6 is connected to the transmission gear 13 through the tooth groove 14. The rotation of the first shaft 7 can drive the rotation of the transmission gear 13. Since the first arc block 6 is connected to the transmission gear 13 through the tooth groove 14, when the transmission gear 13 rotates, it will drive the first arc block 6 to slide inside the arc groove 5.

[0027] Both sides of the transmission gear 13 are fixedly connected with first torsion springs 8 for resetting the transmission gear 13. The ends of the two first torsion springs 8 that are far apart from each other are fixedly connected to the inner walls of the two sides of the movable groove 4. Both first torsion springs 8 are movably sleeved on the outside of the first shaft 7. When the first shaft 7 drives the transmission gear 13 to rotate, the first torsion springs 8 will also undergo corresponding deformation, so as to facilitate the subsequent resetting of the transmission gear 13.

[0028] Both sides of the connecting rod 11 are fixedly connected with second torsion springs 12 for resetting the connecting rod 11. The opposite ends of the two second torsion springs 12 are fixedly connected to the inner walls of the two sides of the movable groove 4 respectively. The second torsion springs 12 are movably sleeved on the outside of the second shaft 10. When the first splicing piece 1 and the three second splicing pieces 2 are spliced ​​together, when the first arc-shaped block 6 slides inside the arc-shaped groove 5, it will extend into the interior of an adjacent arc-shaped groove 5, thereby forcing the adjacent second arc-shaped block 9 to slide inside the arc-shaped groove 5. Finally, the first arc-shaped block 6 and the second arc-shaped block 9 will be inserted into the interior of the adjacent arc-shaped groove 5 respectively, realizing the fixation between the first splicing piece 1 and the second splicing piece 2.

[0029] The drive assembly includes a drive block 18 for easy cooperation with external tools. The drive block 18 is movably fitted inside the groove 19. A drive rod 16 for transmission is fixedly connected to the lower surface of the drive block 18. The lower end of the drive rod 16 movably penetrates into the interior of the movable groove 4. A positioning block 22 for locking the position of the drive block 18 is fixedly connected to the surface of the drive block 18. A fan-shaped groove 20 for limiting the rotation angle of the drive block 18 is formed inside the groove 19. Two positioning grooves 21 are formed on the top wall of the fan-shaped groove 20. The positioning grooves 21 and the positioning blocks 22 are adapted to each other. When operation is required... When the drive block 18 rotates, first press the drive block 18 with an external tool. At this time, the drive block 18 will move downward inside the groove 19, and the positioning block 22 will also move inside the positioning groove 21 until the positioning block 22 disengages from one of the positioning grooves 21 and enters the fan-shaped groove 20. Then the drive block 18 can be rotated. When it is necessary to lock the angle of the drive block 18, after the positioning block 22 and the inner wall of the other side of the fan-shaped groove 20 are abutted, the positioning block 22 is then inserted into the other positioning groove 21, and finally the drive block 18 is locked.

[0030] The first shaft 7 has an internal movable chamber 15 for limiting the movement trajectory of the structure. The lower end of the drive rod 16 slides through the interior of the movable chamber 15. The drive rod 16 is slidably connected to the interior of the movable chamber 15 by means of the cooperation of the slider and the groove. The lower end of the drive rod 16 is fixedly connected to a reset spring 17 for resetting the drive rod 16. The other end of the reset spring 17 is fixedly connected to the inner wall of the movable chamber 15. When the drive rod 16 moves downward with the drive block 18, the drive rod 16 will slide inside the movable chamber 15, thereby squeezing the reset spring 17 so that the drive rod 16 and the drive block 18 can be reset, and further ensure the stability of the positioning block 22 inside the positioning groove 21.

[0031] The outer arc surface of the first arc block 6 is provided with a slot 23 for fixing the position of the first arc block 6. The internal thread of the first splicing part 1 is connected with a locking bolt 24 for cooperating with the slot 23. The locking bolt 24 and the slot 23 are compatible. When the first arc block 6 slides to the designated position, the locking bolt 24 can be inserted into the slot 23 by rotating it, thereby achieving secondary fixing of the first arc block 6, further ensuring the stability of the first arc block 6, and also further ensuring the stability of the drive rod 16, effectively preventing it from rotating or the first arc block 6 from shifting.

[0032] Both the first splicing component 1 and the second splicing component 2 have T-shaped guide blocks 26 fixedly connected to their surfaces for guidance. Both the first splicing component 1 and the second splicing component 2 have T-shaped guide grooves 25 for guidance inside. The T-shaped guide blocks 26 and the T-shaped guide grooves 25 are compatible. When the first splicing component 1 and the second splicing component 2 are spliced, the T-shaped guide blocks 26 are inserted into the T-shaped guide grooves 25 to achieve the initial positioning between the splicing components.

[0033] In the above embodiment, the maximum rotation angle of the positioning block 22 can be set to 20-30°, and when the positioning block 22 rotates to the designated position, it can drive the locking bolt 24 to be smoothly inserted into the slot 23.

[0034] Working principle:

[0035] This easy-to-operate, easily retractable prestressed anchor is initially positioned and fixed between the first splice 1 and the second splice 2 by means of the cooperation between the T-shaped guide block 26 and the T-shaped guide groove 25. Subsequently, the driving block 18 is pressed with an external tool. At this time, the driving block 18 will move downward inside the groove 19, and the positioning block 22 will also move inside the positioning groove 21 until the positioning block 22 disengages from one of the positioning grooves 21 and enters the fan-shaped groove 20. Then the driving block 18 can be rotated. The rotation of the driving block 18 will drive the rotation of the driving rod 16. Since the driving rod 16 is slidably connected to the first shaft 7, the driving rod 16 will drive the first... A shaft 7 rotates, which in turn drives the rotation of the transmission gear 13. Since the first arc-shaped block 6 meshes with the transmission gear 13 through the tooth groove 14, when the transmission gear 13 rotates, it will cause the first arc-shaped block 6 to slide inside the arc-shaped groove 5. When the first splicing piece 1 and the three second splicing pieces 2 are spliced ​​together, the first arc-shaped block 6 will extend into the interior of an adjacent arc-shaped groove 5 as it slides inside the arc-shaped groove 5, thereby forcing the adjacent second arc-shaped block 9 to slide inside the arc-shaped groove 5. Finally, the first arc-shaped block 6 and the second arc-shaped block 9 will be inserted into the interior of the adjacent arc-shaped groove 5 respectively, realizing the connection between the first splicing piece 1 and the second splicing piece 2.

[0036] In addition, after the various splicing parts are connected and fixed, when it is necessary to lock the angle of the drive block 18, after the positioning block 22 and the inner wall of the sector groove 20 on the other side abut against each other, the positioning block 22 will be locked into the interior of another positioning groove 21 under the action of the reset spring 17, thus finally locking the drive block 18.

[0037] Finally, after the first arc-shaped block 6 slides to the designated position, the locking bolt 24 can be inserted into the slot 23 by rotating the locking bolt 24, thereby achieving secondary fixation of the first arc-shaped block 6, further ensuring the stability of the first arc-shaped block 6, and also further ensuring the stability of the drive rod 16, effectively preventing it from rotating or the first arc-shaped block 6 from shifting.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An easy-to-operate and easily retractable prestressed anchor, comprising a first splice (1) and three second splices (2), characterized in that: Both the first splicing component (1) and the second splicing component (2) have defect grooves (3) on their surfaces. Both the first splicing component (1) and the second splicing component (2) have movable grooves (4) and arc-shaped grooves (5) inside their interiors. The movable grooves (4) and arc-shaped grooves (5) are connected. A first arc-shaped block (6) is slidably connected inside the arc-shaped groove (5) inside the first splicing component (1). A first shaft (7) is rotatably connected in the movable groove (4) inside the first splicing component (1). The outside of the first shaft (7) is provided with The second splice (2) is equipped with a transmission component. The second shaft (10) is rotatably connected inside the movable groove (4) inside the second splice (2). A connecting rod (11) is fixedly sleeved on the outside of the second shaft (10). A second arc block (9) is slidably connected inside the arc groove (5) inside the second splice (2) of the connecting rod (11). The second arc block (9) and the connecting rod (11) are fixedly connected. A groove (19) is provided on the upper surface of the first splice (1). A drive component is provided inside the groove (19).

2. The easy-to-operate and easily retractable prestressed anchorage according to claim 1, characterized in that: The transmission assembly includes a transmission gear (13), which is fixedly sleeved on the outside of the first shaft (7). The inner arc surface of the first arc block (6) is provided with a tooth groove (14), and the first arc block (6) is meshed with the transmission gear (13) through the tooth groove (14).

3. The easy-to-operate and easily retractable prestressed anchorage according to claim 2, characterized in that: Both sides of the transmission gear (13) are fixedly connected with first torsion springs (8). The ends of the two first torsion springs (8) that are far apart from each other are fixedly connected to the inner walls of the two sides of the movable groove (4). Both first torsion springs (8) are movably sleeved on the outside of the first shaft (7).

4. The easy-to-operate and easily retractable prestressed anchorage according to claim 3, characterized in that: The connecting rod (11) has two sides of the surface of the connecting rod (11) and two torsion springs (12) are fixedly connected. The opposite ends of the two second torsion springs (12) are fixedly connected to the inner walls of the two sides of the movable groove (4). The second torsion springs (12) are movably sleeved on the outside of the second shaft (10).

5. The easy-to-operate and easily retractable prestressed anchorage according to claim 4, characterized in that: The driving assembly includes a driving block (18), which is movably fitted inside the groove (19). A driving rod (16) is fixedly connected to the lower surface of the driving block (18). The lower end of the driving rod (16) movably penetrates into the interior of the movable groove (4). A positioning block (22) is fixedly connected to the surface of the driving block (18). A fan-shaped groove (20) is opened inside the groove (19). Two positioning grooves (21) are opened on the top wall of the fan-shaped groove (20). The positioning grooves (21) and the positioning blocks (22) are adapted to each other.

6. The easy-to-operate and easily retractable prestressed anchorage according to claim 5, characterized in that: The first shaft (7) has an internal movable chamber (15). The lower end of the drive rod (16) slides through the interior of the movable chamber (15). The drive rod (16) is slidably connected to the interior of the movable chamber (15) by means of the cooperation of the slider and the groove. The lower end of the drive rod (16) is fixedly connected to a return spring (17). The other end of the return spring (17) is fixedly connected to the inner wall of the movable chamber (15).

7. The easy-to-operate and easily retractable prestressed anchorage according to claim 6, characterized in that: The outer arc surface of the first arc block (6) is provided with a slot (23), and the internal thread of the first splice (1) is connected with a locking bolt (24), which is compatible with the slot (23).

8. The easy-to-operate and easily retractable prestressed anchorage according to claim 7, characterized in that: The surfaces of the first splicing component (1) and the second splicing component (2) are fixedly connected with T-shaped guide blocks (26), and the interiors of the first splicing component (1) and the second splicing component (2) are provided with T-shaped guide grooves (25), and the T-shaped guide blocks (26) and the T-shaped guide grooves (25) are compatible.

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