Beam slab prestress tensioning device

Abstract

The utility model discloses a beam plate prestress tensioning device, which relates to the technical field of bridge prestress tensioning and comprises a beam plate, a corrugated pipe is arranged in the beam plate, an anchor backing plate is fixedly connected to a port of the corrugated pipe on the right side surface of the beam plate, a steel strand penetrates through the surfaces of the corrugated pipe and the anchor backing plate, and an anchorage device is mounted on the right side of the anchor backing plate. A limiting plate is fixedly connected to the right side of the anchorage device, a first anchor clamping piece is mounted in the middle of the anchorage device, a second anchor clamping piece is mounted on the surface of the mounting block, a check block is fixedly connected to the right side face of the tension adjusting box, a second rotating shaft is rotationally connected to the surface of the check block through a bearing, and a winding wheel is fixedly connected to the surface of the second rotating shaft. According to the steel strand tensioning device, through the arrangement of the anchorage device, the first anchor clamping piece, the tensioning adjusting box, the fixing column, the load sensing tensioner, the second idler wheel, the installation block, the second anchor clamping piece and the winding wheel, the purpose of improving the practicability of the tensioning device is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge prestressing tensioning, in particular to a beam and slab prestressing tensioning device. Background Art

[0002] A bridge generally refers to a structure built across rivers, lakes, or seas to facilitate the passage of vehicles and pedestrians. To adapt to the rapid development of modern transportation, bridges have also been extended to encompass structures built to facilitate travel across mountain streams, over unfavorable geological conditions, or to meet other transportation needs. Prestressing is the process of applying tension to a component in advance, causing it to experience tensile stress and, in turn, deform to cope with the loads it bears.

[0003] Publication specification of utility model patent application in China CN216920051U A prestressed tensioning device for a bridge slab disclosed in the application has the effect of being directly installed when it is used next time, simplifying the operation of construction workers and improving the construction efficiency of construction workers. However, during the tensioning process of the steel strands, the tension of the steel strands cannot be checked. Too much or too little tension of the steel strands will affect the quality of the bridge slab, and the tension of the steel strands cannot be adjusted well. There is a disadvantage of poor practicality, and the tensioned strands are not convenient to collect, which has the disadvantage of poor convenience of use. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a beam and slab prestressing tensioning device, which solves the problems raised in the above-mentioned background technology.

[0006] (2) Technical solution

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a beam-slab prestressing tensioning device, comprising a beam-slab, a corrugated tube is provided inside the beam-slab, an anchor plate is fixedly connected to the port of the corrugated tube on the right side of the beam-slab, a steel strand is passed through the surface of the corrugated tube and the anchor plate, an anchor is installed on the right side of the anchor plate, the right side of the anchor is fixedly connected to the limit plate, a first anchor clip is installed in the middle of the anchor, the steel strand passes through the first anchor clip and the limit plate, a tensioning adjustment box is installed on the right side of the beam-slab, a through hole is provided on the left side of the tensioning adjustment box, the steel strand is passed through the through hole into the tensioning adjustment box, the inner surface of the left side of the tensioning adjustment box is rotatably connected to the first rotating shaft through a bearing, the outer surface of the first rotating shaft is fixedly connected to the first roller, the first roller The surface is in contact with the steel strand, and the inner top surface of the tensioning adjustment box is fixedly connected to a fixed column, and a load sensing tensioner is installed on the lower surface of the fixed column, and a second roller is installed on the lower surface of the load sensing tensioner, and the lower surface of the second roller is in contact with the surface of the steel strand, and a hydraulic cylinder is installed on the upper surface of the right side of the tensioning adjustment box, and a fourth roller is installed on the telescopic end of the hydraulic cylinder, and the lower surface of the fourth roller is in contact with the surface of the steel strand, and a mounting block is installed on the right side of the tensioning adjustment box, and a second anchor clip is installed on the surface of the mounting block, and the steel strand passes through the second anchor clip, and the right side of the tensioning adjustment box is fixedly connected to a stopper, and the surface of the stopper is rotatably connected to the second rotating shaft through a bearing, and the surface of the second rotating shaft is fixedly connected to a winding wheel, and the steel strand is wound on the winding wheel.

[0008] Optionally, a first threaded hole is provided on the surface of the anchor, a second threaded hole is provided on the surface of the anchor plate, the first threaded hole and the second threaded hole are the same size, a bolt is threadedly connected to the surface of the limiting plate, and the other end of the bolt is threadedly connected to the first threaded hole and the second threaded hole.

[0009] Optionally, the number of the first threaded holes, the second threaded holes and the bolts are all six, and are distributed in a circular array.

[0010] Optionally, a third roller having the same structure as the first roller is provided on the right side of the load sensing tensioner, and the steel strand passes over the first roller and the third roller respectively.

[0011] Optionally, a display is installed on the outer surface of the tensioning adjustment box, and the load sensing tensioner is electrically connected to the display via a wire.

[0012] Optionally, a through groove is provided on the lower surface of the right side of the tensioning adjustment box, and the position of the through groove is opposite to that of the hydraulic cylinder.

[0013] Optionally, there are two blocks, the second rotating shaft is arranged between the two blocks, and the left end face of the second rotating shaft is fixedly connected to the crank.

[0014] (3) Beneficial effects

[0015] The utility model provides a beam-slab prestressing tensioning device, which has the following beneficial effects:

[0016] 1. This beam and slab prestressed tensioning device, through the arrangement of an anchor, a first anchor clip, a tensioning adjustment box, a fixed column, a load sensing tensioner, a second roller, a mounting block, a second anchor clip and a winding wheel, enables the beam and slab prestressed tensioning device to facilitate tension measurement and winding of steel strands during the tensioning process. The device can measure the tension of the steel strands during the tensioning process to avoid excessive or insufficient tension affecting the quality of the bridge slab, facilitate the control of the tension of the steel strands, and at the same time, the tensioned steel strands can be quickly wound up, which is highly convenient and achieves the purpose of improving the practicality of the tensioning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the front section of the utility model;

[0019] Figure 3 For this utility model Figure 2 Schematic diagram of the structure at A in the middle;

[0020] Figure 4 For this utility model Figure 2 Schematic diagram of the structure at B in the middle;

[0021] Figure 5 It is a structural schematic diagram of the side cross-section of the winding wheel of the utility model.

[0022] In the figure: 1. Beam plate; 2. Bellows; 3. Anchor plate; 4. Steel strand; 5. Anchor; 6. First threaded hole; 7. Second threaded hole; 8. Limit plate; 9. Bolt; 10. First anchor clip; 11. Tensioning adjustment box; 12. Through hole; 13. First rotating shaft; 14. First roller; 15. Fixed column; 16. Load sensing tensioner; 17. Second roller; 18. Third roller; 19. Mounting block; 20. Second anchor clip; 21. Hydraulic cylinder; 22. Fourth roller; 23. Through slot; 24. Stop block; 25. Second rotating shaft; 26. Crank handle; 27. Winding wheel; 28. Display. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Example 1

[0025] See also Figures 1 to 5 The utility model provides a technical solution: a prestressed tensioning device for a beam plate 1, comprising a beam plate 1, a corrugated tube 2 is provided inside the beam plate 1, an anchor plate 3 is fixedly connected to the end of the corrugated tube 2 on the right side of the beam plate 1, a steel strand 4 is passed through the surface of the corrugated tube 2 and the anchor plate 3, an anchor 5 is installed on the right side of the anchor plate 3, a limit plate 8 is fixedly connected to the right side of the anchor 5, a first anchor clip 10 is installed in the middle of the anchor 5, the steel strand 4 passes through the first anchor clip 10 and the limit plate 8, a first threaded hole 6 is provided on the surface of the anchor 5, a second threaded hole 7 is provided on the surface of the anchor plate 3, the first threaded hole 6 and the second threaded hole 7 are the same size, and a bolt is threadedly connected to the surface of the limit plate 8 9. The other end of the bolt 9 is threadedly connected to the first threaded hole 6 and the second threaded hole 7. The number of the first threaded hole 6, the second threaded hole 7 and the bolt 9 are all six, and are distributed in a circular array. A tensioning adjustment box 11 is installed on the right side of the beam 1. A through hole 12 is opened on the left side of the tensioning adjustment box 11. The steel strand 4 passes through the through hole 12 into the tensioning adjustment box 11. The inner surface of the left side of the tensioning adjustment box 11 is rotatably connected to the first rotating shaft 13 through the bearing. The outer surface of the first rotating shaft 13 is fixedly connected to the first roller 14. The surface of the first roller 14 abuts against the steel strand 4. The inner top surface of the tensioning adjustment box 11 is fixedly connected to the fixing column 15. The lower surface of the fixing column 15 is installed There is a load sensing tensioner 16, a second roller 17 is installed on the lower surface of the load sensing tensioner 16, and a third roller 18 with the same structure as the first roller 14 is provided on the right side of the load sensing tensioner 16. The steel strand 4 passes over the first roller 14 and the third roller 18 respectively. The lower surface of the second roller 17 abuts against the surface of the steel strand 4. A hydraulic cylinder 21 is installed on the upper surface of the right side of the tensioning adjustment box 11. A fourth roller 22 is installed at the telescopic end of the hydraulic cylinder 21. The lower surface of the fourth roller 22 abuts against the surface of the steel strand 4. A mounting block 19 is installed on the right side of the tensioning adjustment box 11. A second anchor clip 20 is installed on the surface of the mounting block 19. The steel strand 4 passes through The second anchor clip 20 and the right side of the tensioning adjustment box 11 are fixedly connected with a block 24, the surface of the block 24 is rotatably connected to the second rotating shaft 25 through a bearing, the surface of the second rotating shaft 25 is fixedly connected to a winding wheel 27, the steel strand 4 is wound on the winding wheel 27, a display 28 is installed on the outer surface of the tensioning adjustment box 11, the load sensing tensioner 16 is electrically connected to the display 28 through a wire, a through groove 23 is provided on the lower surface of the right side of the tensioning adjustment box 11, the position of the through groove 23 is opposite to the hydraulic cylinder 21, the number of the blocks 24 is two, the second rotating shaft 25 is set in the middle of the two blocks 24, and the left end face of the second rotating shaft 25 is fixedly connected to a crank 26.

[0026] In order to improve the practicality of the tensioning device, when in use, the tensioning adjustment box 11 is installed on the right side of the beam 1. The staff first passes the steel strand 4 through the first anchor clip 10 and the limit plate 8, and then uses the bolt 9 to fix the anchor plate 3, the anchor 5 and the limit plate 8 together. According to the special direction of the first anchor clip 10 (well known to technicians in the relevant field), during the tensioning process of the steel strand 4, the steel strand 4 can only go outward and cannot retract. Then the staff passes the steel strand 4 through the tensioning adjustment box 11. The steel strand 4 passes above the first roller 14, below the second roller 17, and above the fourth roller 22 in the tensioning adjustment box 11. The fourth roller 22 is moved downwards by the fourth roller 22, and the contact point with the steel strand 4 is moved downwards by the fourth roller 22. At this time, the steel strand 4 is pressed tightly against the first roller 14, the second roller 17, the third roller 18 and the fourth roller 22. As the telescopic end of the hydraulic cylinder 21 continues to extend outwards, the steel strand 4 is driven to bend and move downwards. Due to the second anchor clip The steel strand 4 coming out of the plate 20 cannot move to the left, while the steel strand 4 coming out of the first anchor clip 10 can move to the right, thereby tensioning the steel strand 4 in the corrugated tube 2 outward, causing the contact point between the fourth roller 22 and the steel strand 4 to gradually move downward, and finally overflow from the through groove 23 to the tensioning adjustment box 11. At this time, after the telescopic end of the hydraulic cylinder 21 is fully extended, the staff controls the telescopic end of the hydraulic cylinder 21 to retract inward. Due to the setting of the first anchor clip 10, the steel strand 4 cannot retract. At this time, the steel strand 4 in the tensioning adjustment box 11 is in a loose state. The staff fixes the right end of the steel strand 4 on the wind-up wheel 27, and then shakes the crank 26 to pull the steel strand 4 out. The strand 4 is wound onto the winding wheel 27, so that the strand 4 is in a taut state again, and the telescopic end of the hydraulic cylinder 21 is repeatedly controlled to extend outward, and so on, to complete the tensioning of the strand 4. During the tensioning process, as the strand 4 is tensioned, the force applied to the load sensing tensioner 16 through the second roller 17 gradually increases. When the force is applied to the load sensing tensioner 16, the elastic element in the load sensing tensioner 16 will deform. The changes in length and diameter caused by the deformation will affect the resistance of the strain gauge. The change in the resistance value of the strain gauge is proportional to the deformation of the elastic element. When the elastic element is stretched, the resistance value of the strain gauge increases.When compressed, the resistance value decreases. Finally, a bridge circuit (such as a Wheatstone bridge) can accurately measure the change in strain gauge resistance, converting this change into a voltage signal and ultimately displaying the tension value on display 28. Workers can then tension the steel strands 4 accordingly based on the change in tension value. This device measures the tension of the steel strands 4 during the tensioning process, preventing excessive or insufficient tension from affecting the quality of the bridge slab 1. This facilitates control of the tension of the steel strands 4. Furthermore, the tensioned steel strands 4 can be quickly reeled up, providing a high level of convenience and improving the practicality of the tensioning device.

[0027] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A beam-slab prestressing tensioning device, comprising a beam-slab, characterized in that: The cam is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, and the first wheel is fixedly provided with a first wheel, A fixed column is connected, a load sensing tensioner is installed on the lower surface of the fixed column, a second roller is installed on the lower surface of the load sensing tensioner, the lower surface of the second roller is in contact with the surface of the steel strand, a hydraulic cylinder is installed on the upper surface of the right side of the tensioning adjustment box, a fourth roller is installed on the telescopic end of the hydraulic cylinder, the lower surface of the fourth roller is in contact with the surface of the steel strand, a mounting block is installed on the right side of the tensioning adjustment box, a second anchor clip is installed on the surface of the mounting block, the steel strand passes through the second anchor clip, the right side of the tensioning adjustment box is fixedly connected to a stopper, the surface of the stopper is rotatably connected to the second rotating shaft through a bearing, the surface of the second rotating shaft is fixedly connected to a winding wheel, and the steel strand is wound on the winding wheel.

2. The beam-slab prestressing tensioning device according to claim 1, characterized in that: A first threaded hole is provided on the surface of the anchor, a second threaded hole is provided on the surface of the anchor plate, the first threaded hole and the second threaded hole are of the same size, a bolt is threadedly connected to the surface of the limiting plate, and the other end of the bolt is threadedly connected to the first threaded hole and the second threaded hole.

3. The beam-slab prestressing tensioning device according to claim 2, characterized in that: The number of the first threaded holes, the second threaded holes and the bolts are all six, and are distributed in a circular array.

4. The beam-slab prestressing tensioning device according to claim 1, characterized in that: A third roller having the same structure as the first roller is provided on the right side of the load sensing tensioner, and the steel strand passes over the first roller and the third roller respectively.

5. The beam-slab prestressing tensioning device according to claim 1, characterized in that: A display is installed on the outer surface of the tensioning adjustment box, and the load sensing tensioner is electrically connected to the display through a wire.

6. The beam-slab prestressing tensioning device according to claim 1, characterized in that: A through slot is provided on the lower surface of the right side of the tensioning adjustment box, and the position of the through slot is opposite to that of the hydraulic cylinder.

7. The beam-slab prestressing tensioning device according to claim 1, characterized in that: There are two stoppers, the second rotating shaft is arranged between the two stoppers, and the left end surface of the second rotating shaft is fixedly connected to the crank.

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