A prefabricated beam tensioning jack transfer device

Abstract

The utility model relates to a prefabricated beam tensioning jack transfer device, including base, vertical rod, upper crossbeam and manual winch, the base includes two parallelly arranged and have certain interval lower crossbeam, and the both ends bottom of each lower crossbeam is separately established a universal wheel, and the top surface of two lower crossbeams is welded a panel, and the lower end of vertical rod is welded in the top surface middle of panel near rear end, and the rear end of upper crossbeam is welded with the upper end of vertical rod, and the rear end of upper crossbeam is equipped with first steering wheel, and the front end is equipped with second steering wheel, and two vertical boards are welded on the panel and located the outside of vertical rod, and the manual winch is supported on two vertical boards, and the traction rope of manual winch one end passes first steering wheel and second steering wheel in proper order and hangs tensioning jack. The utility model is small in size, light in weight, can carry jack and move flexibly in the beam field, and can adjust the plane position and height of jack quickly when tensioning construction through pushing device movement and rotating manual winch.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology, and specifically relates to a tensioning jack transfer device for prestressing precast beams during precast beam construction in a beam yard. Background Technology

[0002] During the prefabrication process at the beam yard, the prestressed tendons of the prefabricated beams need to be tensioned. Typically, there are multiple tensioning points on a single prefabricated beam. During tensioning, the positions of the tensioning jacks need to be continuously adjusted. After tensioning one prefabricated beam is completed, the jacks need to be moved to the construction location of the next prefabricated beam. If the jack positions and movements are done manually, the heavy weight of the tensioning jacks results in high labor intensity and low efficiency for the construction workers.

[0003] Patent CN206417806U discloses a mobile jack suspension gantry for prestressing tensioning of precast beams and slabs. The jacks are suspended from the gantry by chain hoists, allowing the gantry to carry the jacks around the beam yard. During tensioning, the jacks' positions are adjusted by moving the gantry back and forth, and their left and right movements are achieved via guide rails on the gantry's crossbeam. The jack height is adjusted by the chain hoists. However, the following problems were found during the use of this device: the span of the gantry needs to be greater than the width of the precast beam, resulting in a large gantry size that is inconvenient to move within the beam yard; adjusting the jack positions during tensioning is cumbersome, affecting construction efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a simple precast beam tensioning jack transfer device, which facilitates the movement and transfer of jacks within the beam yard and allows for quick adjustment of the jack position during tensioning.

[0005] The technical solution of this utility model is as follows:

[0006] A precast beam tensioning jack transfer device, characterized in that it includes a base, a vertical rod, an upper crossbeam, and a manual winch; the base includes two parallel lower crossbeams spaced at a certain distance, each lower crossbeam having a caster wheel at its bottom end, and a panel welded between the top surfaces of the two lower crossbeams; the lower end of the vertical rod is welded to the middle of the top surface of the panel near its rear end; the rear end of the upper crossbeam is welded to the upper end of the vertical rod, the upper crossbeam is parallel to the two lower crossbeams, the front end of the upper crossbeam extends in the same direction as the front ends of the two lower crossbeams, and the rear end of the upper crossbeam is provided with a first rotating... The upper crossbeam has a second steering wheel at its front end; the rear end of the panel has two parallel vertical plates with a certain distance between them welded to the outside of the vertical rod. The manual winch is supported on the two vertical plates, and the drum of the manual winch is located between the two vertical plates. The two ends of the roller of the manual winch are rotatably connected to the two vertical plates respectively. One end of the roller of the manual winch is connected to the handle of the manual winch on the outside of one vertical plate; a traction rope is wound on the drum of the manual winch, and one end of the traction rope passes through the first steering wheel and the second steering wheel in sequence and is suspended by the tensioning jack.

[0007] This utility model has a simple structure, small size, and light weight, making it flexible to move within the beam yard and capable of carrying jacks for rapid transfer. During tensioning construction, the horizontal position of the jacks can be adjusted by moving or rotating the pushing device, and the height of the jacks can be adjusted by a hand-cranked winch, achieving all-round adjustment of the jack position with fast adjustment speed and high efficiency. Attached Figure Description

[0008] Figure 1 This is a side view structural diagram of the present invention;

[0009] Figure 2 This is a schematic diagram of the planar structure of this utility model. Detailed Implementation

[0010] like Figure 1 , Figure 2As shown, this utility model includes a base, a vertical rod, an upper crossbeam, and a manual winch; the base includes two parallel lower crossbeams 1 with a certain distance between them, each lower crossbeam having a caster wheel 2 at its bottom end, and a panel 3 welded between the top surfaces of the two lower crossbeams; the lower end of the vertical rod 4 is welded to the middle of the top surface near the rear end of the panel 3; the rear end of the upper crossbeam 5 is welded to the upper end of the vertical rod 4, the upper crossbeam 5 is parallel to the two lower crossbeams 1, the front end of the upper crossbeam extends in the same direction as the front ends of the two lower crossbeams, the rear end of the upper crossbeam 5 is provided with a first steering wheel 6, and the front end of the upper crossbeam is provided with a second steering wheel 6. Steering wheel 7; The rear end of the panel has two parallel vertical plates 8 with a certain distance between them welded to the outside of the vertical rod. The manual winch 9 is supported on the two vertical plates 8. The drum 91 of the manual winch is located between the two vertical plates 8. The two ends of the roller 92 of the manual winch are rotatably connected to the two vertical plates 8 respectively. One end of the roller 92 of the manual winch is connected to the handle 93 of the manual winch on the outside of a vertical plate. The traction rope 10 is wound on the drum of the manual winch. One end of the traction rope 10 passes through the first steering wheel 6 and the second steering wheel 7 in sequence and is suspended by the tensioning jack 11.

[0011] In a specific implementation of this utility model, to ensure the stability of the vertical rod, stiffening plates 12 can be welded between the lower ends of the vertical rod and the top surface of the panel.

[0012] Since the upper crossbeam is a cantilever structure, in order to ensure the stability of the upper crossbeam structure during the specific implementation of this utility model, a diagonal brace 13 can be welded between the vertical rod and the upper crossbeam.

[0013] In a specific implementation of this utility model, two support plates 14 extending longitudinally along the upper crossbeam can be welded to the rear end and front end of the upper crossbeam respectively, and the first steering wheel 6 and the second steering wheel 7 can be rotatably arranged between the two support plates 14 at the rear end and front end of the upper crossbeam respectively.

[0014] In a specific implementation of this utility model, the front end of the upper crossbeam 5 can be extended a certain length in front of the front end of the base 1 to facilitate the installation of the tensioning jack at the end of the precast beam. To ensure the stability of the device's center of gravity, the length of the upper crossbeam extending to the front end of the base should not be too large, preferably 20-50cm.

[0015] When this invention is used for prestressing tensioning of precast beams, the device is pushed to the front of the tensioning end of the precast beam. A manual winch is used to raise and lower the jacks to the same elevation as the prestressing tendons to be tensioned. The horizontal position of the jacks is adjusted by moving the device forward, backward, left, and right, or by rotating the entire device, so that the jacks are aligned with the prestressing tendons to be tensioned. After tensioning one precast beam, the position and height of the jacks are adjusted again in the same way to tension the next prestressing tendon. After tensioning one precast beam, the device carrying the jacks is transferred to the next precast beam to be tensioned. When transferring the jacks, a manual winch can be used to temporarily lower the jacks onto the base panel to ensure the stability of the device's movement.

Claims

1. A precast beam tensioning jack transfer device, characterized in that: The system includes a base, a vertical rod, an upper crossbeam, and a manual winch. The base includes two parallel lower crossbeams spaced apart, each with a caster wheel at its bottom end. A panel is welded between the top surfaces of the two lower crossbeams. The lower end of the vertical rod is welded to the middle of the top surface of the panel near its rear end. The rear end of the upper crossbeam is welded to the upper end of the vertical rod. The upper crossbeam is parallel to the two lower crossbeams, and its front end extends in the same direction as the front ends of the two lower crossbeams. A first steering wheel is located at the rear end of the upper crossbeam, and a second steering wheel is located at the front end. Two parallel vertical plates spaced apart are welded to the top surface of the panel's rear end, outside the vertical rod. The manual winch is supported on the two vertical plates, with its drum located between them. Both ends of the winch's shaft are rotatably connected to the two vertical plates, and one end of the winch's shaft is connected to the winch's handle outside one of the vertical plates. A traction rope is wound around the winch's drum, with one end of the rope passing over the first and second steering wheels and suspending a tensioning jack.

2. The precast beam tensioning jack transfer device according to claim 1, characterized in that: The lower ends of the vertical rod are respectively welded to the top surface of the panel with stiffening plates on both sides.

3. The precast beam tensioning jack transfer device according to claim 1, characterized in that: A diagonal brace is welded between the vertical rod and the upper horizontal beam.

4. The precast beam tensioning jack transfer device according to claim 1, characterized in that: Two support plates extending longitudinally along the upper crossbeam are welded to the rear and front ends of the upper crossbeam, respectively. The first steering wheel and the second steering wheel are respectively rotatably disposed between the two support plates at the rear and front ends of the upper crossbeam.

5. The precast beam tensioning jack transfer device according to claim 1, characterized in that: The front end of the upper crossbeam extends 20-50cm in front of the front end of the base.

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