A prefabricated box girder prestressed steel strand tensioning platform

Abstract

The present application relates to the technical field of bridge construction, and in particular to a prefabricated box girder prestressed steel strand tensioning platform, comprising a frame body, the top of which is slidably connected to a moving mechanism, the moving mechanism is connected to a hoisting hoist, and the lifting end of the hoisting hoist is connected to a tensioning jack; a support is provided on one side of the frame body, the support is used to support the tensioning jack when it is set on the steel strand, and a lifting mechanism is installed on the frame body, the lifting mechanism is used to lift the support. The present application has the effect of reducing the work intensity.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a prefabricated box girder prestressed steel strand tensioning platform. Background Art

[0002] The steel strand tensioning platform is an important component used for tensioning steel strands in prestressed concrete structure construction. It provides a safe and stable working platform for construction workers to carry out steel strand tensioning operations. During the specific implementation, the tensioning jack is installed on the steel strand and the tensioning jack is used to tension the steel strand.

[0003] In the prior art, the tensioning jack is suspended on the tensioning platform by a lifting hoist, and the position of the tensioning jack is adjusted by pulling the lifting hoist. The position height of the tensioning jack is adjusted according to the position height of the steel strand, so that one end of the steel strand can be inserted into the tensioning hole of the tensioning jack conveniently. In actual operation, the position of the tensioning jack may deviate, and the operator is required to continuously lift the tensioning jack for fine adjustment. However, the tensioning jack is heavy, and it is difficult for the operator to lift the tensioning jack, which is very labor-intensive and has high work intensity. Utility Model Content

[0004] In order to reduce the working intensity, the present application provides a prefabricated box girder prestressed steel strand tensioning platform.

[0005] The present application provides a prefabricated box girder prestressed steel strand tensioning platform, which adopts the following technical solution:

[0006] A prefabricated box girder prestressed steel strand tensioning platform comprises a frame body, the top of the frame body is slidably connected to a moving mechanism, the moving mechanism is connected to a lifting hoist, and the lifting end of the lifting hoist is connected to a tensioning jack; a support member is provided on one side of the frame body, the support member is used to support the tensioning jack when it is installed on the steel strand, and a lifting mechanism is installed on the frame body, and the lifting mechanism is used to lift the support member.

[0007] By adopting the above technical solution, when it is necessary to tension the steel strand, the lifting mechanism is started, the lifting mechanism lifts the support member, the position of the support member is adjusted to the steel strand, the tensioning jack is moved under the action of the moving mechanism, and at the same time, the lifting hoist is started, the lifting hoist adjusts the height of the tensioning jack, the position of the tensioning jack is close to the steel strand, when the tensioning jack is installed, the tensioning jack is moved to the support member, the support member supports the tensioning jack, the tensioning jack is fine-tuned under the support of the support member, the operator does not need to continuously lift the tensioning jack to move, thereby reducing the operator's work intensity.

[0008] Optionally, the lifting mechanism includes a lifting drive member, a lifting sprocket, a lifting chain and a lifting member, the lifting drive member is fixed to the frame body, the output end of the lifting drive member is fixed to the lifting sprocket, the lifting sprockets are rotatably connected to the top and bottom of the frame body respectively, the lifting chain is circled on the lifting sprocket, the lifting chain is meshed with the lifting sprocket, both ends of the lifting chain are fixed to the lifting member, and the support member is inserted into the lifting member.

[0009] By adopting the above technical solution, when it is necessary to move the support member to the tensioning position of the steel strand, the lifting drive member is started, the lifting drive member drives the lifting sprocket to rotate, the rotation of the lifting sprocket drives the lifting chain to rotate, the lifting member is fixed to the two ends of the lifting chain, the rotation of the lifting chain drives the lifting member to rise and fall, so that the support member is lifted and lowered, the support member is moved to the tensioning position of the steel strand, the tensioning jack is placed on the support member, and when the height position of the support member is inaccurate, it can also be fine-tuned without moving the tensioning jack, thereby improving the convenience of fine-tuning the position of the tensioning jack and saving manpower.

[0010] Optionally, the lifting member is slidably connected to the frame body.

[0011] By adopting the above technical solution, the moving range of the support member is limited, which reduces the possibility of difficulty in installing the tensioning jack due to the swaying of the support member when the tensioning jack is fine-tuned on the support member, thereby reducing the difficulty of the work.

[0012] Optionally, the support member is rotatably connected to the lifting member.

[0013] By adopting the above technical solution, the friction between the support and the tensioning jack is reduced. When the tensioning jack is installed, the tensioning jack and the support are in rolling contact, which improves the smoothness of the installation of the tensioning jack and reduces manpower consumption.

[0014] Optionally, the moving mechanism includes a moving rod, a first sliding assembly and a second sliding assembly, the moving rod is connected to the lifting hoist through the first sliding assembly, the moving rod is connected to the frame body through the second sliding assembly, and the sliding direction of the first sliding assembly is perpendicular to the sliding direction of the second sliding assembly.

[0015] By adopting the above technical solution, when the tensioning jack needs to be moved, the lifting hoist is started, and the lifting hoist slides along the moving rod under the action of the first sliding component, and slides along the frame under the action of the second sliding component, thereby improving the sliding smoothness of the lifting hoist, reducing the possibility of jamming during the movement of the lifting hoist and causing complicated operation, and reducing work intensity.

[0016] Optionally, the movable rod is provided with a sliding groove, the first sliding assembly includes a sliding member and a roller, the sliding member is connected to the lifting hoist, the roller is rotationally connected to the sliding member, and the roller is in rolling contact with the bottom wall of the sliding groove.

[0017] By adopting the above technical solution, the roller rolls in the sliding groove, thereby improving the sliding smoothness of the lifting hoist on the moving rod, thereby reducing the possibility of jamming when the tensioning jack moves.

[0018] Optionally, the rollers are symmetrically arranged on opposite sides of the moving rod in a clamping shape.

[0019] By adopting the above technical solution, the forces on both sides of the moving rod are balanced, the possibility of the lifting mechanism shifting to one side due to uneven force applied by the hoisting hoist on the moving rod is reduced, and the stability of the sliding direction of the tensioning jack is improved.

[0020] Optionally, a side wall of the roller is rotatably connected with a ball, and the ball is in rolling contact with the side wall of the sliding groove.

[0021] By adopting the above technical solution, the contact area between the roller and the moving rod is reduced, the friction force is reduced, and at the same time, the ball rolls in contact with the side wall of the sliding groove, which improves the smoothness of the ball sliding on the moving rod, thereby improving the smoothness of the movement of the tensioning jack, reducing the possibility of jamming of the tensioning jack, and further reducing the work intensity.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. When the steel strand needs to be tensioned, the lifting mechanism is started, and the lifting mechanism lifts and lowers the support member so that the position of the support member is adjusted to the steel strand. The tensioning jack moves under the action of the moving mechanism. At the same time, the hoist is started, and the hoist adjusts the height of the tensioning jack so that the position of the tensioning jack is close to the steel strand. When the tensioning jack is installed, the tensioning jack moves to the support member, and the support member supports the tensioning jack. The tensioning jack is fine-tuned under the support of the support member. The operator does not need to continuously lift the tensioning jack to move it, thereby reducing the operator's work intensity.

[0024] 2. When the support needs to be moved to the tensioning position of the steel strand, the lifting drive is started, and the lifting drive drives the lifting sprocket to rotate. The lifting sprocket rotates to drive the lifting chain to rotate. The lifting parts are fixed at both ends of the lifting chain. The lifting chain rotates to drive the lifting parts to move up and down, so that the support is lifted and lowered. The support is moved to the tensioning position of the steel strand, and the tensioning jack is placed on the support. When the height position of the support is inaccurate, it can also be fine-tuned without moving the tensioning jack, which improves the convenience of fine-tuning the tensioning jack position and saves manpower;

[0025] 3. When the tensioning jack needs to be moved, start the hoist. The hoist slides along the moving rod under the action of the first sliding component, and slides along the frame under the action of the second sliding component, thereby improving the smoothness of the sliding of the hoist, reducing the possibility of jamming when the hoist moves, resulting in complicated operation, and reducing work intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0027] Figure 2 It is a half-section view of the first sliding component in the embodiment of the present application.

[0028] Figure 3 It is a position diagram of the lifting slot in the embodiment of the present application.

[0029] Description of reference numerals:

[0030] 1. Frame body; 11. Operating platform; 2. Lifting hoist; 21. Tensioning jack; 3. Support member; 4. Tensioning control console; 5. Moving rod; 51. First sliding assembly; 511. Sliding member; 512. Roller; 513. Ball bearing; 52. Second sliding assembly; 6. Lifting drive member; 61. Lifting sprocket; 62. Lifting chain; 63. Lifting member; 64. Lifting slot. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] An embodiment of the present application discloses a prefabricated box girder prestressed steel strand tensioning platform.

[0033] Reference Figure 1 A prefabricated box girder prestressed steel strand tensioning platform comprises a frame body 1, which is a cubic frame formed by connecting square tubes. An operating platform 11 is fixedly connected to the inner side wall of the frame body 1, and the operating platform 11 is located at the bottom of the frame body 1. A moving mechanism is slidably connected to the top of the frame body 1, and the moving mechanism moves along the horizontal plane. The moving mechanism is connected to a lifting hoist 2, and a tensioning jack 21 is connected to the lifting end of the lifting hoist 2; a support member 3 is arranged on one side of the frame body 1, and the support member 3 is rod-shaped. The support member 3 is located at the top of the operating platform 11, and the support member 3 is used to support the tensioning jack 21 when it is installed on the steel strand. A lifting mechanism is installed on the frame body 1, and the lifting mechanism is used to lift the support member 3. A tensioning console 4 is fixedly installed on the top wall of the operating platform 11, and the tensioning console 4 is electrically connected to the lifting mechanism. In this embodiment, the lifting hoist 2 adopts a hand chain hoist.

[0034] When the steel strand is tensioned, the lifting mechanism is started, which drives the support member 3 to rise and fall, so that the position of the support member 3 is adjusted to the steel strand, and the position of the tensioning jack 21 is adjusted. The tensioning jack 21 moves along the horizontal plane under the action of the moving mechanism, so that the set hole of the tensioning jack 21 is close to the vertical plane of the sleeve end of the steel strand. At the same time, the lifting hoist 2 is pulled, and the lifting hoist 2 drives the tensioning jack 21 to rise and fall, and moves the tensioning jack 21 to the support member 3. The support member 3 supports the tensioning jack 21, and the tensioning jack 21 is fine-tuned under the support of the support member 3. The operator does not need to continuously lift the tensioning jack 21 to move, thereby reducing the operator's work intensity.

[0035] The moving mechanism includes a moving rod 5, a first sliding assembly 51 and a second sliding assembly 52. ​​The moving rod 5 is connected to the lifting hoist 2 through the first sliding assembly 51, and the moving rod 5 is connected to the frame body 1 through the second sliding assembly 52. ​​The moving rod 5 is slidingly connected to the first sliding assembly 51, and the end of the first sliding assembly 51 away from the moving rod 5 is fixed to the lifting hoist 2. The second sliding assembly 52 is arranged in two groups and is respectively fixed at both ends of the length direction of the moving rod 5. The second sliding assembly 52 is slidingly connected to the frame body 1, and the sliding direction of the first sliding assembly 51 is perpendicular to the sliding direction of the second sliding assembly 52.

[0036] When the sleeve hole of the tensioning jack 21 is moved to the vertical surface of the sleeve end of the steel strand, the tensioning jack 21 is pushed and pulled, and the tensioning jack 21 drives the hoist 2 to move, so that the hoist 2 slides on the moving rod 5 under the action of the first sliding component 51. At the same time, the moving rod 5 can also slide under the action of the second sliding component 52, thereby driving the tensioning jack 21 to move on the horizontal plane. Under the lifting action of the hoist 2, the tensioning jack 21 moves in three-dimensional space, thereby improving the convenience of movement of the tensioning jack 21, making the movement of the tensioning jack 21 on the horizontal plane smoother, reducing the possibility of jamming of the hoist 2 during movement, resulting in complicated operation, and reducing work intensity.

[0037] Reference Figure 1 and Figure 2 A sliding groove is penetrated on one side of the moving rod 5, and the penetration direction of the sliding groove is consistent with the length direction of the moving rod 5. The first sliding component 51 includes a sliding member 511 and a roller 512. A notch is provided on the top of the sliding member 511, and the notch of the sliding member 511 is in a downward-opening shape. The moving rod 5 is inserted into the notch, and the roller 512 is located in the notch of the sliding member 511. The roller 512 is rotatably connected to the sliding member 511, and the roller 512 is in rolling contact with the bottom wall of the sliding groove. The bottom wall of the sliding member 511 is fixed to the lifting hoist 2. The sliding structure principle of the second sliding component 52 is consistent with the sliding structure principle of the first sliding component 51, and no further details are given.

[0038] When the tensioning jack 21 moves, the roller 512 rolls in contact with the groove wall of the sliding groove, thereby improving the sliding smoothness of the hoisting hoist 2 on the moving rod 5, thereby reducing the possibility of the tensioning jack 21 getting stuck when moving.

[0039] In order to reduce the possibility that the lifting mechanism may deviate to one side due to uneven force applied by the hoisting hoist 2 to the moving rod 5, the rollers 512 are symmetrically arranged on opposite sides of the moving rod 5 in a clamping shape.

[0040] The side wall of the roller 512 is rotatably connected to a plurality of balls 513, which are symmetrically arranged on both sides of the rolling direction of the roller 512. The balls 513 are in rolling contact with the side walls of the sliding groove, further reducing the friction between the roller 512 and the side walls of the sliding groove, improving the smoothness of sliding of the balls 513 on the moving rod 5, and thereby improving the smoothness of movement of the tensioning jack 21, reducing the possibility of jamming of the tensioning jack 21, and further reducing the working intensity.

[0041] Reference Figure 1 and Figure 3 The lifting mechanism includes a lifting drive member 6, a lifting sprocket 61, a lifting chain 62 and a lifting member 63. The lifting drive member 6 is fixed to the frame body 1, and the output end of the lifting drive member 6 is fixed to the lifting sprocket 61. There are two lifting sprockets 61, one of which is rotatably connected to the top of the frame body 1, and the other lifting sprocket 61 is rotatably connected to the top wall of the operating platform 11 and is located at the bottom of the frame body 1. The lifting chain 62 is circled on the lifting sprocket 61, and the lifting chain 62 is meshed with the lifting sprocket 61. The two ends of the lifting chain 62 are respectively fixed to the top wall and the bottom wall of the lifting member 63. The support member 3 is inserted into the lifting member 63, and the tensioning console 4 is electrically connected to the lifting drive member 6.

[0042] When it is necessary to move the support member 3 to the steel strand tensioning position, start the lifting drive member 6, which drives the lifting sprocket 61 to rotate. The rotation of the lifting sprocket 61 drives the lifting chain 62 to rotate. The lifting member 63 is fixed at both ends of the lifting chain 62. The rotation of the lifting chain 62 drives the lifting member 63 to rise and fall, thereby lifting the support member 3, improving the lifting convenience of the support member 3 and simplifying the operation.

[0043] In order to reduce the possibility that the support member 3 sways when the tensioning jack 21 is fine-tuned on the support member 3, causing difficulty in installing the tensioning jack 21, the frame body 1 is provided with a lifting groove 64, which extends in the vertical direction. The lifting member 63 is inserted into the lifting groove 64, and the lifting member 63 slides with the groove wall of the lifting groove 64, so that the support member 3 moves in the vertical direction, reducing the possibility that the support member 3 moves in the horizontal direction, causing difficulty in installing the tensioning jack 21.

[0044] When the tensioning jack 21 is installed on the steel strand, in order to reduce the friction between the support member 3 and the tensioning jack 21, the support member 3 is rotatably connected to the lifting member 63, and the tensioning jack 21 is in rolling contact with the support member 3, thereby improving the smoothness of the installation of the tensioning jack 21 and reducing manpower consumption.

[0045] The implementation principle of a prefabricated box girder prestressed steel strand tensioning platform in an embodiment of the present application is as follows: when the steel strand is tensioned, the lifting drive member 6 is started, and the lifting drive member 6 drives the support member 3 to lift and lower, so that the position of the support member 3 is adjusted to the steel strand, and the position of the tensioning jack 21 is adjusted. The tensioning jack 21 is moved along the horizontal plane through the moving rod 5 under the action of the first sliding component 51 and the second sliding component 52, so that the sleeve hole of the tensioning jack 21 is close to the vertical plane of the steel strand sleeve end. At the same time, the lifting hoist 2 is pulled, and the lifting hoist 2 drives the tensioning jack 21 to lift and lower, and the tensioning jack 21 is moved to the support member 3, and the support member 3 supports the tensioning jack 21. The tensioning jack 21 is fine-tuned under the support of the support member 3, and the operator does not need to continuously lift the tensioning jack 21 to move, thereby reducing the operator's work intensity.

[0046] The above are all preferred embodiments of the present application. The embodiments are only explanations of the present application and do not limit the protection scope of the present application in turn. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A prefabricated box girder prestressed steel strand tensioning platform, characterized in that: The invention comprises a frame body (1), the top of the frame body (1) is slidably connected to a moving mechanism, the moving mechanism is connected to a lifting hoist (2), and the lifting end of the lifting hoist (2) is connected to a tensioning jack (21); a support member (3) is provided on one side of the frame body (1), the support member (3) is used to support the tensioning jack (21) when it is installed on a steel strand, and a lifting mechanism is installed on the frame body (1), and the lifting mechanism is used to lift the support member (3).

2. A prefabricated box girder prestressed steel strand tensioning platform according to claim 1, characterized in that: The lifting mechanism comprises a lifting drive member (6), a lifting sprocket (61), a lifting chain (62) and a lifting member (63); the lifting drive member (6) is fixed to the frame body (1); the output end of the lifting drive member (6) is fixed to the lifting sprocket (61); the lifting sprocket (61) is rotatably connected to the top and bottom of the frame body (1); the lifting chain (62) is arranged on the lifting sprocket (61); the lifting chain (62) is meshed with the lifting sprocket (61); both ends of the lifting chain (62) are fixed to the lifting member (63); and the support member (3) is inserted into the lifting member (63).

3. A prefabricated box girder prestressed steel strand tensioning platform according to claim 2, characterized in that: The lifting member (63) is slidably connected to the frame body (1).

4. The prefabricated box girder prestressed steel strand tensioning platform according to claim 2, characterized in that: The support member (3) is rotatably connected to the lifting member (63).

5. The prefabricated box girder prestressed steel strand tensioning platform according to claim 1, characterized in that: The moving mechanism comprises a moving rod (5), a first sliding assembly (51) and a second sliding assembly (52); the moving rod (5) is connected to the hoist (2) via the first sliding assembly (51); the moving rod (5) is connected to the frame body (1) via the second sliding assembly (52); and the sliding direction of the first sliding assembly (51) is perpendicular to the sliding direction of the second sliding assembly (52).

6. A prefabricated box girder prestressed steel strand tensioning platform according to claim 5, characterized in that: The moving rod (5) is provided with a sliding groove, and the first sliding assembly (51) comprises a sliding member (511) and a roller (512), the sliding member (511) is connected to the lifting hoist (2), the roller (512) is rotationally connected to the sliding member (511), and the roller (512) is in rolling contact with the bottom wall of the sliding groove.

7. A prefabricated box girder prestressed steel strand tensioning platform according to claim 6, characterized in that: The rollers (512) are symmetrically arranged on opposite sides of the moving rod (5) in a clamping manner.

8. The prefabricated box girder prestressed steel strand tensioning platform according to claim 6, characterized in that: A ball (513) is rotatably connected to the side wall of the roller (512), and the ball (513) is in rolling contact with the side wall of the sliding groove.

Images