Prestressed steel strand tensioning device

Abstract

The utility model discloses a prestressed steel strand tensioning device, which relates to the technical field of prestressed construction, and comprises a tensioning mechanism, the tensioning mechanism comprises a jack and a fixing pipe, one end of the fixing pipe is fixedly connected with one end of the jack, a motor drives a driving gear and a driven gear to rotate, so that a threaded rod rotates, and the tensioning mechanism is driven to rotate. The movable seat drives the positioning disc to move, the positioning disc pulls out the positioning pipe in the process of moving along the inner wall of the square pipe, the multiple steel strands are quickly and accurately positioned in the mode that the fixed disc, the positioning disc and the positioning pipe are combined, the straightness of the steel strands is guaranteed, the stress tensioning effect of the steel strands is improved, and the stress tensioning effect of the steel strands is improved. Meanwhile, in the tensioning process, the stress sensor monitors the tensioning stress borne by the steel strand in real time, the displacement sensor measures the elongation of the steel strand, precise control over the tensioning stress and the elongation of the prestressed steel strand is achieved, the tensioning precision is improved, and the quality and safety of a prestressed structure are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of prestressed construction technology, and in particular to a prestressed steel strand tensioning device. Background Technology

[0002] During the construction of steel structure buildings, steel structure units are prone to large deformations under various construction conditions. Therefore, prestressed steel strand tensioning is often used to temporarily reinforce the steel structure units during the construction phase. Prestressed steel strands are made of high-carbon steel wire rods, which are cold-drawn into steel wires after surface treatment. Then, a certain number of steel wires are twisted into strands according to the steel strand structure, and then subjected to a stress-relieving stabilization process. They are suitable for prestressed concrete engineering and other fields. Before the existing prestressed steel strands are used in specific construction applications, the load-bearing capacity of the steel strands needs to be tested with the help of a steel strand prestressing tensioning device.

[0003] For example, Chinese patent CN221669768U discloses a support device for prestressed tensioning of steel strands, including a bracket; a crossbeam, which is installed on the bracket and can reciprocate on the bracket; and an adjustment device, which is connected to the lower part of the crossbeam and is used to install tensioning components and adjust the inclination angle of the tensioning device.

[0004] Traditional prestressed steel strand tensioning devices typically use pressure to clamp and fix the prestressed steel strands before tensioning them. However, traditional tensioning devices cannot accurately and quickly position the steel strands, nor can they guarantee the straightness between the strands, affecting the stress tensioning effect. Furthermore, traditional tensioning devices often have limited tensioning accuracy and difficulty in precisely controlling the tensioning stress, leading to inaccurate prestressing application and affecting the durability and safety of the structure. To address these issues, a prestressed steel strand tensioning device is proposed. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art and to propose a prestressed steel strand tensioning device.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a prestressed steel strand tensioning device, comprising a tensioning mechanism, the tensioning mechanism including a jack and a fixed tube, one end of the fixed tube being fixedly connected to one end of the jack, and an anchor plate being slidably connected to the inner wall of the fixed tube, an annular stress sensor being installed on one side wall of the jack, and a displacement sensor being fixedly connected to one end of the jack, a receiving end being fixedly connected to the top of the anchor plate, and a positioning and protection mechanism being fixedly connected to the outer side of the jack, the positioning and protection mechanism including a square tube, a controller, a motor, a threaded rod, a driving gear, a driven gear, and a positioning tube, the output end of the motor being fixedly connected to one end of the driving gear, and the driven gear... The outer wall of the wheel meshes with the outer wall of the driving gear, and one end of the driven gear is fixedly connected to one end of the threaded rod. A movable seat is threadedly engaged with the outer wall of the threaded rod. A fixed plate is fixedly installed on the inner wall of one end of the square tube, and a positioning plate is slidably installed on the inner wall of the square tube. The top end of the positioning plate is fixedly installed with the bottom end of the movable seat. Multiple through holes are arranged in a circular array at one end of the fixed plate, and multiple positioning holes are arranged in a circular array at one end of the positioning plate. An extension tube is fixedly connected to one end of each through hole, and an extension tube is fixedly connected to one end of each positioning hole. One end of the positioning tube passes through the extension tube and is slidably connected to the inner wall of the fixed plate, and the other end of the positioning tube passes through the extension tube and is slidably connected to the inner wall of the positioning plate.

[0007] Preferably, the two sides of the jack are fixedly installed to the inner side of the square tube, and a fixing plate is fixedly installed on the outer side of the motor.

[0008] Preferably, the bottom end of the fixing plate is fixedly installed to the top end of the square tube, and the bottom of the controller is fixedly connected to the top end of the square tube.

[0009] Preferably, both the driving gear and the driven gear are rotatably mounted inside the fixed plate, and one end of the threaded rod is rotatably connected to the top end of the square tube.

[0010] Preferably, the square tube has symmetrically formed assembly grooves on both sides, and a protective plate is slidably installed on the inner wall of the assembly groove.

[0011] Preferably, the two sides of the movable seat are slidably connected to the top of the square tube.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, the motor drives the driving gear and the driven gear to rotate, causing the threaded rod to rotate, which in turn causes the moving seat to move the positioning plate until the moving seat moves to the end of the threaded rod. As the positioning plate moves along the inner wall of the square tube, it pulls the positioning tube outward. The steel strands pass through the through hole, the positioning tube and the positioning hole in sequence. Through the combination of the fixed plate, the positioning plate and the positioning tube, multiple steel strands are positioned quickly and accurately, ensuring the straightness between the steel strands and improving the stress tension effect of the steel strands.

[0014] 2. In this utility model, during the tensioning process, the stress sensor monitors the tension stress on the steel strand in real time, and the displacement sensor measures the elongation of the steel strand. The data detected by the stress sensor and the displacement sensor are transmitted to the tensioning control system through the data acquisition and transmission module in the controller, thereby realizing precise control of the tension stress and elongation of the prestressed steel strand, greatly improving the tensioning accuracy, and ensuring the quality and safety of the prestressed structure. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a prestressed steel strand tensioning device;

[0016] Figure 2 This utility model provides a schematic diagram of the internal structure of a square tube for a prestressed steel strand tensioning device;

[0017] Figure 3 A front sectional view of a prestressed steel strand tensioning device is provided for this utility model;

[0018] Figure 4 This utility model proposes a prestressed steel strand tensioning device. Figure 3 A magnified view of the details at point A in the middle.

[0019] Legend: 1. Positioning and protection mechanism; 2. Tensioning mechanism; 11. Square tube; 12. Controller; 13. Assembly slot; 14. Protective plate; 15. Fixing plate; 16. Motor; 17. Threaded rod; 18. Moving seat; 19. Fixing plate; 110. Positioning plate; 111. Driving gear; 112. Driven gear; 113. Positioning hole; 114. Through hole; 115. Extension tube one; 116. Extension tube two; 117. Positioning tube; 21. Jack; 22. Fixing tube; 23. Anchor plate; 24. Stress sensor; 25. Displacement sensor; 26. Receiving end. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1: As Figure 1 - Figure 3 As shown, this utility model provides a prestressed steel strand tensioning device, including a tensioning mechanism 2. The tensioning mechanism 2 includes a jack 21 and a fixing pipe 22. One end of the fixing pipe 22 is fixedly connected to one end of the jack 21, and an anchor plate 23 is slidably connected to the inner wall of the fixing pipe 22. A ring-shaped stress sensor 24 is installed on the side wall of one end of the jack 21, and a displacement sensor 25 is fixedly connected to one end of the jack 21. A receiving end 26 is fixedly connected to the top of the anchor plate 23.

[0023] The specific settings and functions of this embodiment are described below: During the tensioning process when the anchor plate 23 moves, the stress sensor 24 monitors the tension stress on the steel strand in real time, and the displacement sensor 25 measures the elongation of the steel strand (the stress sensor 24 adopts a high-precision strain gauge sensor, which has the characteristics of high sensitivity, high stability and fast response. Its measurement range can cover the common tension stress range of prestressed steel strands, and it can work stably in harsh construction site environments with strong anti-interference ability. The displacement sensor 25 adopts the laser ranging principle. The displacement sensor 25 emits a laser beam, and the receiving end 26 receives the reflected light to accurately measure the elongation of the steel strand. The measurement accuracy is high and can accurately reflect the small elongation changes of the steel strand during the tensioning process). The data detected by the stress sensor 24 and the displacement sensor 25 are transmitted to the tensioning control system through the data acquisition and transmission module in the controller 12, realizing the precise control of the tension stress and elongation of the prestressed steel strand, greatly improving the tensioning accuracy and ensuring the quality and safety of the prestressed structure.

[0024] Example 2: Figure 1 - Figure 4As shown, a positioning and protection mechanism 1 is fixedly connected to the outer side of the jack 21. The positioning and protection mechanism 1 includes a square tube 11, a controller 12, a motor 16, a threaded rod 17, a drive gear 111, a driven gear 112, and a positioning tube 117. The output end of the motor 16 is fixedly connected to one end of the drive gear 111. The outer wall of the driven gear 112 meshes with the outer wall of the drive gear 111, and one end of the driven gear 112 is fixedly connected to one end of the threaded rod 17. A movable seat 18 is threadedly engaged with the outer wall of the threaded rod 17. A fixed plate 19 is fixedly installed on the inner wall of one end of the square tube 11, and a positioning plate 110 is slidably installed on the inner wall of the square tube 11. The top end of the positioning plate 110 is fixedly installed with the bottom end of the movable seat 18. A plurality of through holes 114 are opened in a circular array at one end of the fixed plate 19, and a plurality of positioning holes 113 are opened in a circular array at one end of the positioning plate 110. One end of the through holes 114... An extension tube 115 is fixedly connected to one end of a positioning hole 113, and an extension tube 116 is fixedly connected to one end of a positioning hole 113. One end of a positioning tube 117 passes through the extension tube 115 and is slidably connected to the inner wall of a fixed plate 19, and the other end of the positioning tube 117 passes through the extension tube 116 and is slidably connected to the inner wall of a positioning plate 110. The two sides of a jack 21 are fixedly installed to the inner side of a square tube 11. A fixing plate 15 is fixedly installed to the outer side of a motor 16. The bottom end of the fixing plate 15 is fixedly installed to the top end of a square tube 11. The bottom of a controller 12 is fixedly connected to the top end of a square tube 11. Both a drive gear 111 and a driven gear 112 are rotatably installed inside the fixing plate 15. One end of a threaded rod 17 is rotatably connected to the top end of a square tube 11. Assembly slots 13 are symmetrically opened on both sides of the square tube 11, and a protective plate 14 is slidably installed on the inner wall of the assembly slots 13. The two sides of a movable seat 18 are slidably connected to the top end of a square tube 11.

[0025] The overall effect of this embodiment is that the motor 16 drives the driving gear 111 and the driven gear 112 to rotate, thereby causing the threaded rod 17 to rotate. The moving seat 18 drives the bottom positioning plate 110 to move along the inner wall of the square tube 11 away from the fixed plate 19 until the moving seat 18 moves to the end of the threaded rod 17. The motor 16 is then turned off. As the positioning plate 110 moves along the inner wall of the square tube 11, the distance between the positioning plate 110 and the fixed plate 19 gradually increases, thereby pulling the positioning tube 117 outward. The steel strands pass through the through hole 114, the positioning tube 117, and the positioning hole 113 in sequence (the central axes of the through hole 114, the positioning tube 117, and the positioning hole 113 are located on the same straight line). Through the combination of the fixed plate 19, the positioning plate 110, and the positioning tube 117, multiple steel strands are positioned quickly and accurately, ensuring the straightness between the steel strands and improving the stress tension effect of the steel strands.

[0026] The usage and working principle of this device are as follows: At the construction site, the device is installed at the tensioning end of the prestressed steel strand and connected to the oil pipe of the hydraulic pump station. At this time, multiple steel strands are passed through the through hole 114 of the fixed plate 19, the positioning hole 113 of the positioning plate 110, and the jack 21 in sequence. The motor 16 is turned on by the controller 12. The motor 16 drives the drive gear 111 and the driven gear 112 to rotate, thereby causing the threaded rod 17 to rotate. The moving seat 18 drives the bottom positioning plate 110 to move away from the fixed plate 19 along the inner wall of the square tube 11 until the moving seat 18 moves to the end of the threaded rod 17. During the movement of the positioning plate 110 along the inner wall of the square tube 11, the positioning tube 117 is pulled outward. Through the combination of the fixed plate 19, the positioning plate 110 and the positioning tube 117, multiple steel strands are quickly and accurately positioned to ensure the straightness between the steel strands.

[0027] At this time, the operator starts the hydraulic pump station according to the engineering design requirements, and the power source begins to provide power to the tensioning jack 21. The tensioning jack 21 tensions the steel strand through the moving anchor plate 23. A ring-shaped stress sensor 24 is installed on one side wall of the jack 21, and a displacement sensor 25 is fixedly connected to one end of the jack 21. A receiving end 26 is fixedly connected to the top of the anchor plate 23. During the tensioning process when the anchor plate 23 moves, the stress sensor 24 monitors the tension stress on the steel strand in real time, and the displacement sensor 25 measures the elongation of the steel strand. The data detected by the stress sensor 24 and the displacement sensor 25 are transmitted to the tensioning control system through the data acquisition and transmission module in the controller 12, realizing precise control of the tension stress and elongation of the prestressed steel strand.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A prestressed steel strand tensioning device, comprising a tensioning mechanism (2), the tensioning mechanism (2) comprising a jack (21) and a fixing pipe (22), one end of the fixing pipe (22) being fixedly connected to one end of the jack (21), and an anchor plate (23) being slidably connected to the inner wall of the fixing pipe (22), characterized in that: A ring-shaped stress sensor (24) is installed on one side wall of the jack (21), and a displacement sensor (25) is fixedly connected to one end of the jack (21). A receiving end (26) is fixedly connected to the top of the anchor plate (23). A positioning protection mechanism (1) is fixedly connected to the outside of the jack (21). The positioning protection mechanism (1) includes a square tube (11), a controller (12), a motor (16), a threaded rod (17), a drive gear (111), a driven gear (112), and a positioning tube (117). The output end of the motor (16) is fixedly connected to one end of the drive gear (111). The outer wall of the driven gear (112) meshes with the outer wall of the drive gear (111), and one end of the driven gear (112) is fixedly connected to one end of the threaded rod (17). The outer wall of the threaded rod (17) is threaded. There is a movable base (18). A fixed plate (19) is fixedly installed on the inner wall of one end of the square tube (11), and a positioning plate (110) is slidably installed on the inner wall of the square tube (11). The top end of the positioning plate (110) is fixedly installed with the bottom end of the movable base (18). A plurality of through holes (114) are opened in a ring array at one end of the fixed plate (19). A plurality of positioning holes (113) are opened in a ring array at one end of the positioning plate (110). An extension tube (115) is fixedly connected to one end of the through hole (114). An extension tube (116) is fixedly connected to one end of the positioning hole (113). One end of the positioning tube (117) passes through the extension tube (115) and is slidably connected to the inner wall of the fixed plate (19). The other end of the positioning tube (117) passes through the extension tube (116) and is slidably connected to the inner wall of the positioning plate (110).

2. The prestressed steel strand tensioning device according to claim 1, characterized in that: The jack (21) is fixedly installed on both sides and the inside of the square tube (11), and a fixing plate (15) is fixedly installed on the outside of the motor (16).

3. The prestressed steel strand tensioning device according to claim 2, characterized in that: The bottom end of the fixing plate (15) is fixedly installed to the top end of the square tube (11), and the bottom of the controller (12) is fixedly connected to the top end of the square tube (11).

4. The prestressed steel strand tensioning device according to claim 2, characterized in that: The driving gear (111) and driven gear (112) are both rotatably mounted inside the fixed plate (15), and one end of the threaded rod (17) is rotatably connected to the top end of the square tube (11).

5. The prestressed steel strand tensioning device according to claim 1, characterized in that: The square tube (11) has symmetrically provided assembly grooves (13) on both sides, and a protective plate (14) is slidably installed on the inner wall of the assembly groove (13).

6. The prestressed steel strand tensioning device according to claim 1, characterized in that: The two sides of the movable seat (18) are slidably connected to the top of the square tube (11).

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