CN204278196U - A kind of jacking cylinder underneath type prefabricated subsection box girder inner formwork - Google Patents

Abstract

A prefabricated segmental box girder inner mold with a jacking cylinder under it, including a jacking cylinder, a bracket, a top formwork and a side formwork, the top formwork is fixed on the top of the support, and the side forms are symmetrically installed on both sides of the top formwork And supported by lateral oil cylinders, the bottom of the support is symmetrically installed with a plurality of jacking oil cylinders with the central axis of the support as the symmetrical axis, and the jacking oil cylinders are supported on the beam-making pedestal or the ground. The device is safe and convenient to use, easy to remove from the mold, good overall stability, less disassembly and assembly of the template, and a large operating space, effectively reducing the labor intensity of workers and improving production efficiency.

Description

A prefabricated segmental box girder inner mold with jacking cylinder under it

technical field

The utility model relates to an inner mold of a prefabricated segmental box girder with a lower lifting oil cylinder.

Background technique

At present, prefabricated segmental girder box girders are widely used in China. In the prior art, the internal formwork of the prefabricated segmental box girder mostly adopts the structure that the jacking cylinder is placed on top, the top formwork is lowered separately, and the side formwork is moved laterally inward. However, the structure is complicated, there are many supporting screws, the formwork is difficult to disassemble and assemble, and the operating space is greatly limited, which consumes manpower and material resources, and the work efficiency is low.

Utility model content

The utility model overcomes the deficiencies of the prior art and provides a bottom-mounted jacking cylinder with safe and convenient use, simple demoulding, good overall stability, less disassembly and assembly of the template, and a large operating space, which effectively reduces the labor intensity of workers and improves production efficiency. Prefabricated segmental box girder internal formwork.

A prefabricated segmental box girder inner mold with a jacking cylinder under it, including a jacking cylinder, a bracket, a top formwork and a side formwork, the top formwork is fixed on the top of the support, and the side forms are symmetrically installed on both sides of the top formwork And supported by lateral oil cylinders, the bottom of the support is symmetrically installed with a plurality of jacking oil cylinders with the central axis of the support as the symmetrical axis, and the jacking oil cylinders are supported on the beam-making pedestal or the ground.

The bottom of the support is symmetrically installed with a plurality of height-adjustable support legs with the central axis of the support as the symmetry axis, so that after the jacking cylinder is supported in place, the adjustable support legs can bear the load during construction, ensuring that the jacking cylinder can be used in concrete pouring. No force during the process.

A roller set is installed on the bottom of the support, and a track is installed on the ground corresponding to the roller set, and the roller set is installed on the track.

The side templates are hinged on both sides of the top template, and the side templates can be contracted and stretched under the drive of the lateral oil cylinder.

The support includes a bottom support and a top support, the top formwork is fixed on the top support, and the top support and the side formwork are equipped with corresponding telescopic stay fixing points, and the telescopic stay is used to connect the side formwork The position is fixed.

Due to the adoption of the above structure, the utility model installs the jacking oil cylinder at the bottom of the bracket, which reduces the space for installing the jacking oil cylinder in the inner cavity and the separate lowering of the top template, so that the operating space becomes larger. The hinged connection between the top formwork and the side formwork, the shrinkage of the side formwork is controlled by the oil cylinder, the demoulding is simple, and saves the time of dismantling the top formwork and side formwork. At the same time, adjustable support legs are installed on the bottom bracket to withstand beam pouring The load generated at the time ensures that the oil cylinder is not stressed when the beam section is poured, and protects the jacking cylinder: the top formwork is directly installed and fixed on the top bracket, so that the formwork and the support form an integral body, effectively ensuring the operation space of the inner mold; the telescopic support rod is installed on the Between the top bracket and the side formwork, the section size of the formwork is controlled and the construction load is transferred to the top bracket; the support strut is installed at the front end of the top bracket to support the top bracket and transfer the construction load to the bottom form; the bottom bracket There are also rollers installed below, which are used to move the inner mold out of the beam-making platform through the track under the external traction after the prefabrication of the beam section is completed. In summary, the utility model has the advantages of simple demoulding, less disassembly and assembly of templates, large operating space, and convenient use.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the adjustable support leg and roller set of the present invention.

Fig. 3 is a schematic diagram of the structure of the utility model in the mold closing state.

Fig. 4 is a side view of the utility model.

In the figure: 1-jacking cylinder, 2-bottom bracket, 3-top formwork, 4-top support, 5-side cylinder, 6-side formwork, 7-telescopic strut, 8-support strut, 9-track , 10-adjustable support legs, 11-rollers, 12-bottom mold.

detailed description

Embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

As shown in FIGS. 1 to 4 , a prefabricated segmental box girder inner mold with a jacking cylinder under it includes a jacking cylinder 1 , a bracket, and a top formwork 3 , and the bracket includes a top bracket 4 and a bottom bracket 2 . The jacking cylinder 1 is installed and fixed on the bottom bracket 2, and the top formwork 3 is installed and fixed on the top bracket 4, wherein the top bracket 4 is equipped with a support strut 8 to bear the working load, as shown in Figure 4, the support strut 8 is It is arranged to support between the top bracket 4 and the bottom mold 12. The support struts 8 are installed at the front end of the top bracket 4 for supporting the top bracket 4 and transferring the construction load to the bottom mold 12. The bottom bracket 2 is equipped with several sufficient The adjustable support leg 10 and the roller set 11 that bear the load of the working state. The top formwork 3 is hingedly connected with the side formwork 6, and the shrinkage of the side formwork 6 is controlled by a lateral oil cylinder 5. The inner chamber of the box girder is equipped with a detachable telescopic strut 7 that increases the rigidity of the inner mold, and at least two rows of demoulding tracks 9 are arranged longitudinally below the roller group 11 .

When the utility model is erected, the jacking cylinder 1 is first controlled by the hydraulic system, and the piston rod of the jacking cylinder 1 is stretched out to lift the bottom support 2 into place, and the supporting struts 8 are installed to make the top formwork 3 meet the construction requirements. Then adjust the adjustable support leg 10 to allow the adjustable support leg 10 to bear the load during construction to ensure that the jacking cylinder 1 is not stressed. Then the lateral cylinder 5 is controlled by the hydraulic system to adjust the side formwork 6 in place, and the telescopic strut 7 is installed to fix the position of the formwork and strengthen the rigidity of the formwork. At this time, the inner mold is in a fully stretched state, and the concrete can be placed in this state, as shown in Figure 1 and Figure 2.

When the utility model closes the mold, the telescopic struts 7 and the support struts 8 are first removed, and the side formwork 6 is folded in by controlling the lateral oil cylinder 5 through the hydraulic system. Then adjust the adjustable support leg 10, and control the jacking cylinder 1 through the hydraulic system, so that the piston rod of the jacking cylinder 1 shrinks, and the inner mold as a whole drops to the design height. As shown in Figure 3, after the shrinking formwork is completed, the inner formwork can be removed from the poured prefabricated beam section by pulling the external hoist.

Claims (5)

1. a kind of jacking oil cylinder lower set type prefabricated segmental box girder internal mold, comprises jacking oil cylinder, support, top formwork and side formwork, described top formwork is fixed on the top of support, and described side formwork is symmetrically installed on the top formwork Both sides are supported by lateral oil cylinders, and the feature is that: the bottom of the support is symmetrically installed with a plurality of jacking cylinders with the central axis of the support as the symmetry axis, and the jacking cylinders are supported on the beam-making pedestal or the ground. 2. The inner mold of the prefabricated segmental box girder under the jacking cylinder according to claim 1, characterized in that: the bottom of the bracket is symmetrically mounted with a plurality of height-adjustable support legs with the central axis of the bracket as the symmetrical axis , so that after the jacking cylinder is supported in place, it can bear the load during construction through the adjustable support legs. 3. The inner mold of prefabricated segmental box girder under the jacking cylinder according to claim 1 or 2, characterized in that: a roller set is installed on the bottom of the support, and a roller set is installed on the ground corresponding to the roller set. track, and the roller set is installed on the track. 4. The inner formwork of the prefabricated segmental box girder under the jacking cylinder according to claim 3, characterized in that: the side formwork is hinged on both sides of the top formwork, and the side formwork can Driven by the oil cylinder, it shrinks and expands. 5. The inner mold of prefabricated segmental box girder under the jacking cylinder according to claim 4, characterized in that: the support includes a bottom support and a top support, the top formwork is fixed on the top support, and the top support Corresponding telescopic strut fixing points are installed on the side formwork, and the telescopic strut is used to fix the position of the side formwork.