CN221253710U - Large jack transfer device for pre-stressing and post-tensioning cast-in-situ box girder - Google Patents
Large jack transfer device for pre-stressing and post-tensioning cast-in-situ box girder Download PDFInfo
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- CN221253710U CN221253710U CN202323088402.5U CN202323088402U CN221253710U CN 221253710 U CN221253710 U CN 221253710U CN 202323088402 U CN202323088402 U CN 202323088402U CN 221253710 U CN221253710 U CN 221253710U
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- jack
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- tensioning
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 11
- 238000003466 welding Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model relates to a large jack transfer device for pre-stressing and post-tensioning of a cast-in-situ box girder, which comprises a rectangular frame girder, wherein universal wheels are respectively arranged at the bottoms of 4 corners of the frame girder, inclined supporting rods are respectively welded at the tops of 4 corners of the frame girder, the upper ends of the 4 inclined supporting rods are welded with a square connecting block right above the center of the frame girder, a bearing rod is horizontally welded between two inclined supporting rods which are diagonally welded with the frame girder, and a hand-pulled hoist is hung in the middle of the bearing rod. The utility model adopts the hand hoist to lift the jack, the jack is carried by the manual pushing device to walk on the beam surface, the jack can be accurately placed into the box beam preformed hole, the air posture is stable when the jack is lifted and transported, and the jack can be prevented from colliding with the box beam.
Description
Technical Field
The utility model belongs to the technical field of bridge construction, relates to a cast-in-situ box girder post-tensioning method prestress tensioning construction, and in particular relates to a large jack transfer device for cast-in-situ box girder prestress post-tensioning.
Background
The construction of the cast-in-situ box girder post-tensioning method needs to adopt a large jack to carry out prestress tensioning in the box chamber. When the box girder is poured and constructed, a reserved hole is usually formed in the top plate and used for placing the tensioning jack into the box chamber, but in order to ensure the integral structural strength of the box girder, the reserved hole is usually smaller and can only accommodate the jack to enter and exit. Because the jack is heavy, at present, when stretch-draw construction, usually adopt tower crane or crane to put into bridge floor preformed hole with the jack, again with the jack lifting out the box after the stretch-draw of one position is accomplished, move to next stretch-draw position. However, the lifting jack is hung by a crane, the aerial posture is not easy to control, the jack is easy to collide with the side wall of the reserved hole, and the jack and bridge concrete are easy to damage.
Disclosure of Invention
The utility model aims to solve the problems and provides a large jack transfer device for pre-stressing and post-tensioning of a cast-in-situ box girder, which is convenient for lifting and transferring of a jack.
The technical scheme of the utility model is as follows:
A large-scale jack transfer device that is used for cast-in-situ box girder prestressing force post-tensioning, its characterized in that: the frame beam comprises a rectangular frame beam formed by welding two cross beams and two longitudinal beams, the distance between the two cross beams of the frame beam is larger than the length of a jack, the distance between the two longitudinal beams is larger than the diameter of the jack, universal wheels are respectively arranged at the bottoms of the 4 corners of the frame beam, inclined supporting rods are respectively welded at the tops of the 4 corners of the frame beam, the upper ends of the 4 inclined supporting rods are welded with a square connecting block right above the center of the frame beam, a bearing rod is horizontally welded between the two inclined supporting rods welded with the opposite corners of the frame beam, and a pull block is hung in the middle of the bearing rod.
The utility model has simple structure and convenient use, the manual pushing device walks on the beam surface, the hand hoist is adopted to lift the lifting jack, the stable posture of the lifting jack can be ensured during lifting, the lifting jack is accurately placed into the reserved hole of the box beam, after one position is tensioned, the lifting jack is lifted out of the box chamber from the reserved hole, and the lifting jack is pushed to the next tensioning position along the beam surface.
Drawings
FIG. 1 is a schematic view of the overall structure and use of the present utility model.
Detailed Description
As shown in figure 1, the utility model comprises a rectangular frame beam 1 formed by welding two cross beams and two longitudinal beams, wherein the distance between the two cross beams of the frame beam is larger than the length of a jack, the distance between the two longitudinal beams is larger than the diameter of the jack, universal wheels 2 are respectively arranged at the bottoms of 4 corners of the frame beam, inclined supporting rods 3 are respectively welded at the top surfaces of 4 corners of the frame beam, the upper ends of the 4 inclined supporting rods are welded with a square connecting block 4 right above the center of the frame beam, a bearing rod 5 is horizontally welded between the two inclined supporting rods 3 which are diagonally welded with the frame beam, and a hand-pulled hoist 6 is hung in the middle of the bearing rod 5.
When the utility model is implemented, the limiting blocks 7 protruding upwards can be welded between the top surfaces of the two longitudinal beams respectively, so that the stability of the lifting jack in the air during lifting and transferring is ensured.
In the concrete implementation of the utility model, in order to ensure the strength of the 4 corners of the frame beam, a stiffening plate 8 can be welded at the 4 corners of the frame beam, and the lower ends of the 4 diagonal braces 3 are respectively welded with the stiffening plates 8 at the 4 corners of the frame beam.
As shown in fig. 1, when the utility model is used, the hand hoist 6 lifts the jack 9, the jack is lifted to be higher than the frame beam, the pushing device moves the jack to be above the reserved hole 11 on the box beam 10, and the hand hoist is operated to lower the jack 9 from the reserved hole 11 into the box beam box; after the tensioning construction is completed, the hand hoist is operated to hoist the jack out of the box chamber from the reserved hole, and the pushing device transfers the jack to the next construction position.
Claims (3)
1. A large-scale jack transfer device that is used for cast-in-situ box girder prestressing force post-tensioning, its characterized in that: the frame beam comprises a rectangular frame beam formed by welding two cross beams and two longitudinal beams, the distance between the two cross beams of the frame beam is larger than the length of a jack, the distance between the two longitudinal beams is larger than the diameter of the jack, universal wheels are respectively arranged at the bottoms of the 4 corners of the frame beam, inclined supporting rods are respectively welded at the tops of the 4 corners of the frame beam, the upper ends of the 4 inclined supporting rods are welded with a square connecting block right above the center of the frame beam, a bearing rod is horizontally welded between the two inclined supporting rods welded with the opposite corners of the frame beam, and a pull block is hung in the middle of the bearing rod.
2. The large jack transfer device for pre-stressing and post-tensioning of cast-in-situ box girders according to claim 1, characterized in that: and limiting blocks protruding upwards are welded between the top surfaces of the two longitudinal beams respectively.
3. The large jack transfer device for pre-stressing and post-tensioning of cast-in-situ box girders according to claim 1, characterized in that: and the stiffening plates are welded at the 4 corners of the frame beam, and the lower ends of the 4 diagonal braces are respectively welded with the stiffening plates at the 4 corners of the frame beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323088402.5U CN221253710U (en) | 2023-11-15 | 2023-11-15 | Large jack transfer device for pre-stressing and post-tensioning cast-in-situ box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323088402.5U CN221253710U (en) | 2023-11-15 | 2023-11-15 | Large jack transfer device for pre-stressing and post-tensioning cast-in-situ box girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221253710U true CN221253710U (en) | 2024-07-02 |
Family
ID=91655234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323088402.5U Active CN221253710U (en) | 2023-11-15 | 2023-11-15 | Large jack transfer device for pre-stressing and post-tensioning cast-in-situ box girder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221253710U (en) |
-
2023
- 2023-11-15 CN CN202323088402.5U patent/CN221253710U/en active Active
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