Prestress tensioning device for expressway bridge

Abstract

The utility model belongs to the technical field of bridge prestress tensioning devices, and provides an expressway bridge prestress tensioning device which comprises a bridge plate, a steel bar is fixedly installed on one side of the bridge plate, and a nut is movably installed on the outer side of the steel bar. The stretching assembly comprises a telescopic frame, a telescopic column is movably installed in the telescopic frame, a first threaded rod is movably installed in the telescopic column, and one end of the first threaded rod is in transmission connection with a driven bevel gear; the movable telescopic column is arranged in the telescopic frame, so that the device can meet the tensioning requirements of different lengths, the universality and the flexibility of the device are improved, the telescopic column is driven by the servo motor to move accurately, manual adjustment is not needed, the operation process is greatly simplified, and the working efficiency is improved. By means of the automatic operation, the working efficiency is improved, operation errors caused by human factors are reduced, and the construction safety is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of bridge prestressing tensioning devices, specifically relating to prestressing tensioning devices for highway bridges. Background Technology

[0002] In the field of highway bridge construction, prestressed technology is of paramount importance as a key means to improve the strength and durability of bridge structures. The prestressing tensioning device, as the core equipment for implementing prestressed technology, directly affects the quality and progress of bridge construction.

[0003] However, traditional prestressed tensioning devices are often complex in structure, containing numerous precision components. This not only increases the manufacturing cost of the equipment but also poses significant challenges to installation and commissioning. Construction personnel need to spend a considerable amount of time familiarizing themselves with the equipment structure and mastering complex operating procedures, which undoubtedly prolongs the construction period and increases construction costs. Furthermore, the complex structure also means a higher failure rate. Once the equipment malfunctions, repair and replacement of parts will consume a significant amount of time and resources, further impacting the construction schedule. Utility Model Content

[0004] The purpose of this invention is to provide a prestressed tensioning device for highway bridges to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The prestressing tensioning device for highway bridges includes:

[0007] A bridge deck, wherein a steel bar is fixedly installed on one side of the bridge deck, and a nut is movably installed on the outside of the steel bar;

[0008] A tensioning assembly, comprising a telescopic frame, a telescopic column movably mounted inside the telescopic frame, a first threaded rod movably mounted inside the telescopic column, and a driven bevel gear being driven to one end of the first threaded rod.

[0009] The abutting component includes an adjusting frame, inside which a second threaded rod is movably installed. The second threaded rod has two threaded segments with opposite directions of rotation. Each threaded segment is threaded with a threaded block, and an abutting block is connected to one side of the threaded block.

[0010] Preferably, the telescopic frame is installed on the side of the bridge deck near the reinforcing bars, the telescopic column slides against the inner wall of the telescopic frame, a support plate is fixedly installed inside the telescopic frame near the bridge deck, and a threaded rod is installed inside the telescopic column by threaded engagement, with the end of the threaded rod near the support plate being movably connected to the support plate by a bearing.

[0011] Preferably, a driven bevel gear is movably mounted on the side of the support plate away from the first threaded rod, and the driven bevel gear is shaft-driven connected to the first threaded rod. A driving bevel gear is movably mounted inside the telescopic frame near the driven bevel gear via a bearing, and the driving bevel gear meshes with the driven bevel gear.

[0012] Preferably, a servo motor is mounted on the outside of the telescopic frame near the active bevel gear via a fixed base. The output end of the servo motor is connected to the shaft of the active bevel gear via a coupling. Limiting grooves are symmetrically opened on both sides of the telescopic frame. Limiting blocks are movably installed inside the limiting grooves. The limiting blocks are fixedly connected to the telescopic column on the side near the inside of the telescopic frame.

[0013] Preferably, an adjustment frame is fixedly installed at one end of the telescopic column, and a second threaded rod is movably installed inside the adjustment frame via a bearing. The second threaded rod has two threaded segments with opposite directions of rotation, and each threaded segment is threaded with a threaded block. The threaded block slides against the inner wall of the adjustment frame. A knob is movably installed on the outside of the adjustment frame near the second threaded rod, and the knob is connected to the shaft of the second threaded rod via a drive.

[0014] Preferably, a connecting strip is fixedly installed on the side of the threaded block away from the adjusting frame, and an abutment block is fixedly installed on the end of the connecting strip away from the threaded block, with the abutment block fitting against the nut side.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) This utility model enables the device to adapt to tensioning requirements of different lengths by setting movable telescopic columns inside the telescopic frame, thereby improving the versatility and flexibility of the equipment. The telescopic columns are precisely moved by servo motors, eliminating the need for manual adjustment and greatly simplifying the operation process. This automated operation not only improves work efficiency but also reduces operational errors caused by human factors and improves construction safety. The telescopic columns can move precisely along the predetermined length direction, ensuring the accuracy of prestressing tension. By precisely controlling the moving distance of the telescopic columns, the tension of the steel bars can be precisely controlled, thereby meeting the design requirements and improving the strength and durability of the bridge structure.

[0017] (2) This utility model sets two abutment blocks on one side of the adjustment frame that can move closer to each other and further away from each other. The distance between the two abutment blocks can be adjusted to achieve rapid adaptation to nuts of different sizes and precise fitting of nuts of different specifications. This design not only improves the versatility of the equipment, but also reduces the workload of on-site modification and adjustment, and improves construction efficiency. The abutment blocks fit tightly to the nuts when moving, ensuring the stability and accuracy of tensioning. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0020] Figure 3 This is a schematic diagram of the telescopic column installation structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the mounting structure of the abutment block of this utility model.

[0022] In the diagram: 1. Bridge plate; 11. Reinforcing bar; 12. Nut; 2. Tension assembly; 21. Telescopic frame; 22. Telescopic column; 23. Support plate; 24. Threaded rod No. 1; 25. Driven bevel gear; 26. Driven bevel gear; 27. Servo motor; 28. Limiting groove; 29. ​​Limiting block; 3. Abutment assembly; 31. Adjusting frame; 32. Threaded rod No. 2; 33. Threaded block; 34. Knob; 35. Connecting strip; 36. Abutment block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0024] Example 1:

[0025] Please see Figure 1 - Figure 4 As shown, the prestressed tensioning device for highway bridges includes:

[0026] Bridge deck 1, with a steel bar 11 fixedly installed on one side of bridge deck 1, and a nut 12 movably installed on the outside of the steel bar 11;

[0027] The tensioning assembly 2 includes a telescopic frame 21, a telescopic column 22 is movably installed inside the telescopic frame 21, a first threaded rod 24 is movably installed inside the telescopic column 22, and a driven bevel gear 25 is connected to one end of the first threaded rod 24.

[0028] The abutting component 3 includes an adjusting frame 31, inside which a second threaded rod 32 is movably installed. The second threaded rod 32 has two threaded segments with opposite directions of rotation. Both threaded segments are threadedly mounted with threaded blocks 33, and an abutting block 36 is connected to one side of the threaded block 33.

[0029] Specifically, the telescopic frame 21 is installed on the side of the bridge slab 1 near the reinforcing bar 11. The telescopic column 22 slides against the inner wall of the telescopic frame 21. A support plate 23 is fixedly installed inside the telescopic frame 21 on the side near the bridge slab 1. A threaded rod 24 is installed inside the telescopic column 22 by threaded engagement. The end of the threaded rod 24 near the support plate 23 is movably connected to the support plate 23 by a bearing. A driven bevel gear 25 is movably installed on the side of the support plate 23 away from the threaded rod 24. The driven bevel gear 25 is connected to the shaft of the threaded rod 24 by a shaft drive. A driving bevel gear 26 is movably installed inside the telescopic frame 21 on the side near the driven bevel gear 25 by a bearing. The driving bevel gear 26 meshes with the driven bevel gear 25.

[0030] As can be seen from the above, the first threaded rod 24 can drive the telescopic column 22 to move back and forth inside the telescopic frame 21. Through the cooperation of the driven bevel gear 25 and the driving bevel gear 26, the first threaded rod 24 can be rotated by the servo motor 27, thereby driving the telescopic column 22 to move.

[0031] Specifically, a servo motor 27 is mounted on the outside of the telescopic frame 21 near the active bevel gear 26 via a fixed base. The output end of the servo motor 27 is connected to the shaft of the active bevel gear 26 via a coupling. Limiting grooves 28 are symmetrically opened on both sides of the telescopic frame 21. Limiting blocks 29 are movably installed inside the limiting grooves 28. The limiting blocks 29 are fixedly connected to the telescopic column 22 on the side near the inside of the telescopic frame 21.

[0032] As can be seen from the above, the limiting block 29 and the limiting groove 28 can limit the telescopic column 22, so that the telescopic column 22 can only move in a straight line.

[0033] In use, the servo motor 27 is started first, and the first threaded rod 24 is rotated through the cooperation of the active bevel gear 26 and the driven bevel gear 25. The first threaded rod 24 drives the telescopic column 22 to move forward. The telescopic column 22 pushes the abutment block 36 to stick to one side of the nut 12, and then continues to push the nut 12 to stretch the steel bar 11.

[0034] Example 2:

[0035] Please see Figure 1 and Figure 4 As shown, an adjustment frame 31 is fixedly installed at one end of the telescopic column 22. A second threaded rod 32 is movably installed inside the adjustment frame 31 via a bearing. The second threaded rod 32 has two threaded sections with opposite directions of rotation. Threaded blocks 33 are threadedly installed on both threaded sections. The threaded blocks 33 slide against the inner wall of the adjustment frame 31. A knob 34 is movably installed on the outside of the adjustment frame 31 near the second threaded rod 32. The knob 34 is connected to the shaft of the second threaded rod 32 via a drive.

[0036] Specifically, a connecting strip 35 is fixedly installed on the side of the threaded block 33 away from the adjusting frame 31, and an abutment block 36 is fixedly installed on the end of the connecting strip 35 away from the threaded block 33. The abutment block 36 is in contact with one side of the nut 12.

[0037] As can be seen from the above, since the No. 2 threaded rod 32 has two threaded segments with opposite directions of rotation, when the No. 2 threaded rod 32 rotates, it will drive the two threaded blocks 33 to move towards or away from each other, thereby driving the abutment blocks 36 on both sides to move closer or further away from each other, so that the abutment blocks 36 can adapt to nuts 12 and steel bars 11 of different specifications. The knob 34 makes it convenient to adjust the No. 2 threaded rod 32 from the outside.

[0038] In use, first install the telescopic frame 21 next to the reinforcing bar 11, then turn the knob 34 to drive the second threaded rod 32 to rotate. The second threaded rod 32 drives the two threaded blocks 33 to move closer to each other. The threaded blocks 33 simultaneously drive the abutment blocks 36 to move closer to each other until the abutment blocks 36 are located on one side of the nut 12. Then start the servo motor 27 to drive the telescopic column 22 to move. The abutment blocks 36 move away from the bridge slab 1 until the abutment blocks 36 are tightly attached and apply prestress to the nut 12. By continuously moving the telescopic column 22, the reinforcing bar 11 is effectively stretched, and the prestressing tensioning operation is completed.

[0039] 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. A highway bridge prestress tensioning device, characterized in that, include: A bridge deck (1) is provided, wherein a steel bar (11) is fixedly installed on one side of the bridge deck (1), and a nut (12) is movably installed on the outside of the steel bar (11); The tensioning assembly (2) includes a telescopic frame (21), a telescopic column (22) is movably installed inside the telescopic frame (21), a first threaded rod (24) is movably installed inside the telescopic column (22), and a driven bevel gear (25) is connected to one end of the first threaded rod (24). The abutting component (3) includes an adjusting frame (31), in which a second threaded rod (32) is movably installed. The second threaded rod (32) has two threaded segments with opposite directions of rotation. Both threaded segments are threaded with threaded blocks (33). An abutting block (36) is connected to one side of the threaded block (33).

2. The expressway bridge prestress tensioning device according to claim 1, characterized in that, The telescopic frame (21) is installed on the side of the bridge slab (1) near the reinforcing bar (11). The telescopic column (22) slides against the inner wall of the telescopic frame (21). A support plate (23) is fixedly installed inside the telescopic frame (21) on the side near the bridge slab (1). A threaded rod (24) is installed inside the telescopic column (22) by threaded engagement. The end of the threaded rod (24) near the support plate (23) is movably connected to the support plate (23) by a bearing.

3. The expressway bridge prestress tensioning device according to claim 2, characterized in that, A driven bevel gear (25) is movably installed on the side of the support plate (23) away from the first threaded rod (24). The driven bevel gear (25) is connected to the shaft of the first threaded rod (24). A driving bevel gear (26) is movably installed inside the telescopic frame (21) near the driven bevel gear (25) via a bearing. The driving bevel gear (26) meshes with the driven bevel gear (25).

4. The prestressed tensioning device for highway bridges according to claim 3, characterized in that, A servo motor (27) is mounted on the outside of the telescopic frame (21) near the active bevel gear (26) via a fixed base. The output end of the servo motor (27) is connected to the shaft of the active bevel gear (26) via a coupling. Limiting grooves (28) are symmetrically opened on both sides of the telescopic frame (21). Limiting blocks (29) are movably installed inside the limiting grooves (28). The limiting blocks (29) are fixedly connected to the telescopic column (22) on the side near the inside of the telescopic frame (21).

5. The expressway bridge pre-stress tension device according to claim 1, characterized in that, An adjustment frame (31) is fixedly installed at one end of the telescopic column (22). A second threaded rod (32) is movably installed inside the adjustment frame (31) via a bearing. The second threaded rod (32) has two threaded segments with opposite directions of rotation. Both threaded segments are threaded with threaded blocks (33). The threaded blocks (33) slide against the inner wall of the adjustment frame (31). A knob (34) is movably installed on the outside of the adjustment frame (31) near the second threaded rod (32). The knob (34) is connected to the shaft of the second threaded rod (32) via a drive.

6. The expressway bridge prestress tensioning device according to claim 5, characterized in that, A connecting strip (35) is fixedly installed on the side of the threaded block (33) away from the adjusting frame (31), and an abutment block (36) is fixedly installed on the end of the connecting strip (35) away from the threaded block (33). The abutment block (36) is in contact with one side of the nut (12).

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