A device for preventing the floating of a prestressed tensioning box during the pouring of concrete

Abstract

This invention relates to the field of tension box installation technology during concrete pouring, specifically a device to prevent prestressed tension boxes from floating during concrete pouring. A transverse telescopic rod is slidably inserted into the lower end of a right-angle air passage. The end of the transverse telescopic rod is provided with a double-conical block located in a screw hole. The lower outer wall of the bolt is provided with an annular conical groove that mates with the double-conical block. The beneficial effects are: the compression of the double-conical block causes the longitudinal lifting rod to rise, separating the tension box from the concrete, facilitating disassembly; the lateral extension of the top rod causes the conical nut and bolt to rotate synchronously, achieving separation of the conical nut from the concrete; and the rotation of the bolt enables segmented separation of the tension box from the nut, greatly reducing the disassembly steps and the requirements for disassembly tools, and improving disassembly efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of tension box installation during concrete pouring, specifically a device to prevent prestressed tension boxes from floating during concrete pouring. Background Technology

[0002] With the vigorous development of economies around the world, infrastructure is becoming increasingly massive. In order to reduce the amount of steel bars used and lower energy consumption, prestressed steel strands will be used more and more in construction projects. In order to facilitate the smooth tensioning of post-tensioned steel strands on the floor slab and prevent the prestressed tensioning box from floating up during concrete pouring, which would cause difficulties in tensioning the prestressed steel strands.

[0003] In existing technologies, the position of the tension box is usually fixed by connecting it to the anchoring steel bars. The most common method is bolt fixing. In order to facilitate turnover, existing designs are mostly detachable structures. However, the turnover of existing technologies requires two disassemblies to achieve the overall disassembly of the device. First, the tension box is disassembled, and then the connecting components connected to the tension box are disassembled. Therefore, the disassembly efficiency is reduced, and the turnover fixing device is damaged. Summary of the Invention

[0004] The purpose of this invention is to provide a device to prevent prestressed tensioning boxes from floating during concrete pouring, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A device for preventing a prestressed tensioning box from floating during concrete pouring includes an anti-floating device comprising:

[0007] Anchoring steel bars are cast in concrete. A conical nut is fixedly connected to the upper end of the anchoring steel bars. A rubber pad is provided at the upper end of the conical nut. The upper end of the rubber pad is in contact with the lower end face of the tension box. A bolt is provided inside the tension box. The bolt passes through the tension box and is inserted into the conical nut.

[0008] The conical nut is composed of a lower conical block and an upper conical block, which are fixedly connected. The upper conical block has a vertically arranged screw hole for accommodating the bolt insertion, and the lower conical block has a lower hole for accommodating the fixed insertion of the anchoring steel bar. The lower hole is separated from the screw hole. A right-angle air passage is provided in the upper conical block. One end of the right-angle air passage is provided with a longitudinal lifting rod located on the upper end face of the upper conical block, and the other end of the right-angle air passage is connected to the lower end side wall of the screw hole. A transverse telescopic rod is slidably inserted into the lower end of the right-angle air passage. The end of the transverse telescopic rod is provided with a double-conical block located in the screw hole. The lower end outer wall of the bolt is provided with an annular conical groove that mates with the double-conical block.

[0009] Preferably, the upper end of the bolt is provided with a hexagonal nut, a threaded sleeve is sleeved on the outer side of the upper end of the bolt, a hinge seat is provided on the upper end of the threaded sleeve, and a rotating handle is rotatably mounted on the hinge seat.

[0010] Preferably, a rod is vertically inserted through the bolt, the upper end of the rod is provided with a protrusion, the lower end of the rod is provided with an inclined conical surface, the upper end of the protrusion extends to the outside of the nut at the upper end of the bolt, the upper end of the protrusion is provided with a pressure groove, the end of the handle is provided with a hemispherical head, the hemispherical head is rotatably sleeved on the hinge seat, and the lower outer wall of the hemispherical head is pressed into the pressure groove.

[0011] Preferably, the upper end of the bolt is provided with a stepped inner cavity, the protrusion is located at the upper end of the stepped inner cavity, the upper end of the insertion rod is sleeved with a second spring, the upper end of the second spring abuts against the lower end of the protrusion, and the lower end of the second spring presses against the stepped surface of the stepped inner cavity.

[0012] Preferably, pistons are provided at the lower end of the longitudinal lifting rod and the end of the transverse telescopic rod. The pistons slide along the right-angle air passage. The middle section of the longitudinal lifting rod passes through the rubber pad, and the upper end of the longitudinal lifting rod is pressed against the lower end face of the tension box.

[0013] Preferably, a third spring is sleeved on the transverse telescopic rod, and the third spring is pressed between the double-conical block and the inner wall of the right-angle airway.

[0014] Preferably, the bolt is provided with four sets of transverse sliding grooves arranged in a circumferential array at the lower end of the conical groove, and a top rod is slidably installed in the transverse sliding groove. The outer end of the top rod is provided with an end block, and the other end of the top rod is provided with an end ball that abuts against the inclined conical surface.

[0015] Preferably, the screw hole is provided with four sets of arc-shaped side grooves on the inner wall of the upper end of the double-conical block, and the position of the side grooves corresponds to the top rod.

[0016] Preferably, the lower end of the upper cone block is provided with a stepped groove, the upper end of the lower cone block is threadedly rotatably installed in the stepped groove, and a sealing ring is pressed onto the stepped surface of the stepped groove.

[0017] Preferably, a first spring is sleeved on the push rod, and the first spring abuts between the outer wall of the end of the push rod near the end ball and the inner wall of the transverse sliding groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention connects the tension box and the anchoring reinforcement by designing a conical nut. The separate conical nut allows for a fixed connection after bolt insertion. During disassembly, the compression of the double-conical blocks lifts the longitudinal lifting rod, separating the tension box from the concrete for easier disassembly. The lateral extension of the lifting rod allows the conical nut and bolt to rotate synchronously, further separating the nut from the concrete. Thus, the rotation of the bolt enables the segmented separation of the tension box and nut, significantly reducing the disassembly steps and tool requirements, and improving disassembly efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation structure of the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0022] Figure 3 for Figure 2 Enlarged view of the structure at point B in the middle;

[0023] Figure 4 This is a schematic diagram of the bolt structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the bolt's three-dimensional structure according to the present invention;

[0025] Figure 6 This is a schematic diagram of the upper cone block structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the three-dimensional structure of the upper cone block of the present invention.

[0027] In the diagram: 1. Tensioning box; 2. First spring; 3. Rotating handle; 4. Bolt; 5. Screw sleeve; 6. Anchoring steel bar; 7. Concrete; 8. Conical nut; 9. Rubber pad; 10. Lower cone block; 11. Upper cone block; 12. Second spring; 13. Hemispherical rotating head; 14. Protrusion; 15. Insert rod; 16. Right-angle air passage; 17. Longitudinal lifting rod; 18. Side groove; 19. Lateral telescopic rod; 20. Third spring; 21. Double-conical cone block; 22. Conical groove; 23. Screw hole; 24. Inclined cone surface; 25. Lateral slide groove; 26. Top rod; 27. Hinge seat; 28. Pressure groove; 29. ​​Stepped groove. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1 to 7 The present invention provides a technical solution:

[0030] A device for preventing a prestressed tensioning box from floating during concrete pouring includes an anti-floating device comprising an anchoring steel bar 6, a tapered nut 8, and a bolt 4.

[0031] Anchor steel bar 6 is poured into concrete 7. The upper end of anchor steel bar 6 is fixedly connected to conical nut 8. A rubber pad 9 is provided at the upper end of conical nut 8. The upper end of rubber pad 9 is attached to the lower end face of tension box 1. Bolt 4 is provided inside tension box 1. Bolt 4 passes through tension box 1 and is inserted into conical nut 8. Conical nut 8 is composed of lower conical block 10 and upper conical block 11. Lower conical block 10 and upper conical block 11 are fixedly connected. A screw hole 23 for accommodating the insertion of bolt 4 is provided vertically on upper conical block 11. A lower hole for accommodating the fixed insertion of anchor steel bar 6 is provided on lower conical block 10. The lower hole is separated from screw hole 23.

[0032] By utilizing the fit between the screw hole 23 and the lower hole, the anchoring steel bar 6 and bolt 4 are installed, and then the tensioning box 1 is fixedly installed on the anchoring steel bar 6. After concrete is poured, the above-mentioned device can be disassembled after it is formed.

[0033] A right-angle air passage 16 is provided in the upper cone block 11. A longitudinal lifting rod 17 is provided at one end of the right-angle air passage 16, located on the upper end face of the upper cone block 11. The other end of the right-angle air passage 16 is connected to the lower end side wall of the screw hole 23. A transverse telescopic rod 19 is slidably inserted into the lower end of the right-angle air passage 16. A double-conical block 21 located in the screw hole 23 is provided at the end of the transverse telescopic rod 19. An annular conical groove 22 that mates with the double-conical block 21 is provided on the lower outer wall of the bolt 4. A piston is provided at the lower end of the longitudinal lifting rod 17 and the end of the transverse telescopic rod 19. The piston slides along the right-angle air passage 16. The middle section of the longitudinal lifting rod 17 passes through the rubber pad 9. The upper end of the longitudinal lifting rod 17 is pressed against the lower end face of the tension box 1. A third spring 20 is sleeved on the transverse telescopic rod 19. The third spring 20 is pressed between the double-conical block 21 and the inner wall of the right-angle air passage 16.

[0034] During installation, bolt 4 presses against the double-cone cone block 21, causing the double-cone cone block 21 to compress the third spring 20 and slide into the right-angle air passage 16. As bolt 4 descends, the annular cone groove 22 corresponds to the double-cone cone block 21. Under the action of the reset spring force, the double-cone cone block 21 pops out and fits against the outer wall of the annular cone groove 22.

[0035] When disassembly is required, the rotation of bolt 4 causes the outer wall of the annular conical groove 22 to gradually press against the lower conical surface of the double conical block 21, thereby driving the double conical block 21 to extend again into the right-angle air passage 16. At this time, the internal pressure of the right-angle air passage 16 increases, driving the longitudinal lifting rod 17 to rise and lift the tension box 1 that is adhered to the concrete 7, so that the lower end surface of the tension box 1 separates from the concrete 7, making it easier to disassemble the tension box 1.

[0036] A hexagonal nut is provided at the upper end of bolt 4. A threaded sleeve 5 is fitted onto the outer side of the upper end of bolt 4. A hinge seat 27 is provided at the upper end of threaded sleeve 5. A rotating handle 3 is rotatably mounted on the hinge seat 27. A rod 15 is vertically inserted through bolt 4. A protrusion 14 is provided at the upper end of rod 15. An inclined conical surface 24 is provided at the lower end of rod 15. The upper end of protrusion 14 extends to the outer side of the nut at the upper end of bolt 4. A groove 28 is provided at the upper end of protrusion 14. The end of the handle 3 is provided with a hemispherical head 13, which is rotatably sleeved on the hinge seat 27. The lower outer wall of the hemispherical head 13 is pressed into the pressure groove 28. The upper end of the bolt 4 is provided with a stepped inner cavity. The protrusion 14 is located at the upper end of the stepped inner cavity. The upper end of the insert rod 15 is sleeved with a second spring 12. The upper end of the second spring 12 abuts against the lower end of the protrusion 14, and the lower end of the second spring 12 is pressed onto the stepped surface of the stepped inner cavity.

[0037] By setting the hexagonal nut and the sleeve 5 to fit together, the bolt 4 can be easily rotated and disassembled by using the handle 3. During the disassembly process, the second spring 12 is used to achieve the elastic installation of the insertion rod 15 by lifting and lowering. The rotation of the hemispherical head 13 is used to press the protrusion 14 downward, so that the insertion rod 15 descends.

[0038] Bolt 4 is located at the lower end of the conical groove 22 and is provided with four sets of transverse sliding grooves 25 arranged in a circumferential array. A push rod 26 is slidably installed in the transverse sliding groove 25. An end block is provided at the outer end of the push rod 26, and an end ball is provided at the other end of the push rod 26 that abuts against the inclined conical surface 24. The screw hole 23 is located on the inner wall of the upper end of the double conical block 21 and is provided with four sets of arc-shaped side grooves 18. The position of the side grooves 18 corresponds to that of the push rod 26.

[0039] During the descent of the insertion rod 15, the inclined conical surface 24 presses against the end ball, causing the top rod 26 to extend outward and insert into the side groove 18. At this time, the top rod 26 and the upper conical block 11 form a misaligned insertion, thereby using the rotation of the bolt 4 to drive the conical nut 8 to rotate synchronously, so that the conical nut 8 is separated from the adhesive of the concrete 7, making it easy to recycle.

[0040] The lower end of the upper cone block 11 is provided with a stepped groove 29, and the upper end of the lower cone block 10 is threadedly mounted in the stepped groove 29. A sealing ring is pressed onto the stepped surface of the stepped groove 29. A first spring 2 is sleeved on the top rod 26. The first spring 2 abuts between the outer wall of the end of the top rod 26 near the end ball and the inner wall of the transverse slide groove 25.

[0041] The first spring 2 keeps the top rod 26 retracted in the transverse slide groove 25, and the stepped groove 29 achieves a fixed connection between the upper cone block 11 and the lower cone surface 10.

[0042] Working principle: First, the installation of anchor steel bar 6 and bolt 4 is achieved by using the cooperation of screw hole 23 and lower hole. Then, tension box 1 is fixedly installed on anchor steel bar 6. After concrete is poured, the above device can be disassembled after it is formed.

[0043] During the disassembly process, the bolt 4 is first disassembled by using the hexagonal nut and the sleeve 5 to make convenient rotation of the handle 3. As the bolt 4 rotates and rises, the outer wall of the annular conical groove 22 gradually squeezes the lower conical surface of the double conical block 21, thereby driving the double conical block 21 to extend into the right-angle air passage 16 again. At this time, the internal pressure of the right-angle air passage 16 increases, driving the longitudinal lifting rod 17 to rise and lift the tension box 1 that is attached to the concrete 7, so that the lower end of the tension box 1 separates from the concrete 7, which facilitates the disassembly of the tension box 1.

[0044] When bolt 4 moves to the upper end of double-conical block 21, the right-angle rotating handle 3 is rotated so that hemispherical head 13 presses against the upper end of protrusion 14. The pressing angle is fixed by the pressing groove 28. At this time, under the downward pressure of hemispherical head 13, the insertion rod 15 descends. At this time, the inclined conical surface 24 squeezes the end ball, so that the top rod 26 extends outward and is inserted into the side groove 18. At this time, the top rod 26 and the upper conical block 11 form a misaligned insertion. Thus, the rotation of bolt 4 drives the conical nut 8 to rotate synchronously, so that the conical nut 8 is separated from the bond of concrete 7.

[0045] Thus, the tension box 1 and the conical nut 8 can be separated without complete disassembly, thereby improving the integrated drive disassembly of the device, increasing disassembly efficiency and protecting the device.

[0046] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing a prestressed tensioning box from floating during concrete pouring, comprising an anti-floating device, characterized in that: The anti-buoyancy device includes: Anchoring steel bar (6), the anchoring steel bar (6) is poured into concrete (7), the upper end of the anchoring steel bar (6) is fixedly connected to a conical nut (8), the upper end of the conical nut (8) is provided with a rubber pad (9), the upper end of the rubber pad (9) is attached to the lower end face of the tension box (1), the tension box (1) is provided with a bolt (4), the bolt (4) passes through the tension box (1) and is inserted into the conical nut (8); The conical nut (8) is composed of a lower conical block (10) and an upper conical block (11). The lower conical block (10) and the upper conical block (11) are fixedly connected. The upper conical block (11) has a vertically arranged screw hole (23) for accommodating the insertion of a bolt (4). The lower conical block (10) has a lower hole for accommodating the fixed insertion of an anchoring steel bar (6). The lower hole is separated from the screw hole (23). The upper conical block (11) has a right-angle air passage (16). 6) One end is provided with a longitudinal lifting rod (17) located on the upper end face of the upper cone block (11), and the other end of the right-angle air passage (16) is connected to the lower side wall of the screw hole (23). The lower end of the right-angle air passage (16) is slidably inserted with a transverse telescopic rod (19). The end of the transverse telescopic rod (19) is provided with a double-cone cone block (21) located in the screw hole (23). The lower outer wall of the bolt (4) is provided with an annular cone groove (22) that cooperates with the double-cone cone block (21). The lower end of the longitudinal lifting rod (17) and the end of the transverse telescopic rod (19) are both provided with pistons. The pistons slide along the right-angle air passage (16). The middle section of the longitudinal lifting rod (17) passes through the rubber pad (9). The upper end of the longitudinal lifting rod (17) is pressed against the lower end face of the tension box (1). A third spring (20) is sleeved on the transverse telescopic rod (19), and the third spring (20) is pressed between the double-cone cone block (21) and the inner wall of the right-angle airway (16).

2. The device for preventing a prestressed tensioning box from floating during concrete pouring according to claim 1, characterized in that: The upper end of the bolt (4) is provided with a hexagonal nut, and a threaded sleeve (5) is sleeved on the outer side of the upper end of the bolt (4). A hinge seat (27) is provided on the upper end of the threaded sleeve (5), and a rotating handle (3) is rotatably installed on the hinge seat (27).

3. The device for preventing a prestressed tensioning box from floating during concrete pouring according to claim 2, characterized in that: A rod (15) is vertically inserted through the bolt (4). The upper end of the rod (15) is provided with a protrusion (14), and the lower end of the rod (15) is provided with an inclined conical surface (24). The upper end of the protrusion (14) extends to the outside of the nut at the upper end of the bolt (4). The upper end of the protrusion (14) is provided with a pressure groove (28). The end of the handle (3) is provided with a hemispherical head (13). The hemispherical head (13) is rotatably sleeved on the hinge seat (27), and the lower outer wall of the hemispherical head (13) is pressed into the pressure groove (28).

4. The device for preventing the prestressed tensioning box from floating during concrete pouring according to claim 3, characterized in that: The upper end of the bolt (4) is provided with a stepped inner cavity, the protrusion (14) is located at the upper end of the stepped inner cavity, the upper end of the insert rod (15) is sleeved with a second spring (12), the upper end of the second spring (12) abuts against the lower end of the protrusion (14), and the lower end of the second spring (12) presses against the stepped surface of the stepped inner cavity.

5. A device for preventing a prestressed tensioning box from floating during concrete pouring, as described in claim 3, characterized in that: The bolt (4) is provided with four sets of transverse sliding grooves (25) arranged in a circular array at the lower end of the conical groove (22). A top rod (26) is slidably installed in the transverse sliding groove (25). An end block is provided at the outer end of the top rod (26), and an end ball is provided at the other end of the top rod (26) against the inclined conical surface (24).

6. A device for preventing a prestressed tensioning box from floating during concrete pouring, as described in claim 5, characterized in that: The screw hole (23) is located on the inner wall of the upper end of the double-conical block (21) and has four sets of arc-shaped side grooves (18). The position of the side grooves (18) corresponds to the top rod (26).

7. The device for preventing the prestressed tensioning box from floating during concrete pouring according to claim 1, characterized in that: The lower end of the upper cone block (11) is provided with a stepped groove (29), and the upper end of the lower cone block (10) is threadedly mounted in the stepped groove (29), and a sealing ring is pressed onto the stepped surface of the stepped groove (29).

8. A device for preventing a prestressed tensioning box from floating during concrete pouring, as described in claim 5, characterized in that: A first spring (2) is sleeved on the top rod (26), and the first spring (2) abuts against the outer wall of the end of the top rod (26) near the end ball and the inner wall of the transverse groove (25).

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