CN204309092U - Rotary shaft box girder inner formwork - Google Patents

Abstract

The utility model belongs to the technical field of bridge box girder inner formwork construction. In order to solve the technical problems of difficult construction and long construction time in dismantling the prefabricated box girder inner formwork, the utility model provides a rotating shaft type box girder inner formwork, including the left half auxiliary formwork and the right half of the secondary template, the left half of the secondary template is connected with the right half of the secondary template, the left half of the secondary template includes inner mold 1 and inner mold 2, the inner mold 1 and inner mold 2 are connected by a rotating shaft, and the right half of the secondary template includes inner mold 3 and inner mold four, inner mold three and inner mold four are connected by a rotating shaft, the upper end of the inner mold is provided with an upper hinge point, the lower end of the inner mold is provided with a lower hinge point, and the upper hinge point and the lower hinge point are vertically arranged respectively, and the upper support rod and the lower hinge point are vertically arranged respectively. The upper hinge point is connected, the lower support rod is connected with the lower hinge point, the pull rod is perpendicular to the upper and lower support rods, the pull rod, the upper support rod and the lower support rod are connected by bolts, and one end of the pull rod is provided with a pull ring. The utility model has the advantages of simple structure, convenient removal of the inner mold, reduced labor intensity of workers, and improved work efficiency.

Description

Shaft type box girder inner mold

technical field

The utility model belongs to the technical field of bridge box girder inner mold construction, in particular to a rotating shaft type box girder inner mold.

Background technique

With the implementation of the western development strategy, more and more high-grade highways appear in the western and northern deep gullies and dangerous areas. The height of bridge piers is getting higher and higher, and there will be more and more prefabricated box girders. At present, the inner formwork of box girder used in construction projects adopts a single box structure, and there are partitions around the box, but during the removal process of the inner formwork, due to the limitation of the height of the box, the inner formwork must be dismantled into small pieces , It can only be removed from the beam body after disintegration, which is time-consuming and labor-intensive, and also reduces work efficiency.

Contents of the invention

The utility model provides a rotary shaft type inner mold for box girders to solve the technical problems of high construction difficulty and long construction time for dismantling the inner mold of the prefabricated box girder.

The technical scheme that the utility model adopts is as follows:

A rotary shaft type box girder inner formwork, comprising left half formwork, right half formwork, upper support bar, lower support bar, upper hinge point, lower hinge point, pull rod and pull ring, left half formwork includes inner mold one and Inner mold 2, the lower end of inner mold 1 is connected with the upper end of inner mold 2 through a rotating shaft, the right half of the auxiliary template includes inner mold 3 and inner mold 4, the lower end of inner mold 3 and the upper end of inner mold 4 are connected through a rotating shaft, and the left half of the auxiliary template The upper end and the lower end of the formwork are respectively connected with the upper end and the lower end of the right half secondary formwork, the upper ends of the inner mold 1 and the inner mold 3 are respectively provided with upper hinge points, and the lower ends of the inner mold 2 and inner mold 4 are respectively provided with lower hinge points, The upper hinge point and the lower hinge point are set vertically respectively, the upper end of the upper support rod is connected with the upper hinge point by bolts, the lower end of the lower support rod is connected with the lower hinge point by bolts, and the tie rod is arranged at the lower end of the upper support rod and connected with the upper support rod. The rod and the lower support rod are vertical, and the lower end of the pull rod, the upper support rod and the upper end of the lower support rod are connected by bolts, and one end of the pull rod is provided with a pull ring.

By adopting the utility model, when the concrete of the prefabricated box girder reaches a certain strength, the inner mold of the box girder is easily separated from the concrete by pulling the pull rod through the winch, which is safe and fast.

The beneficial effects of the utility model: the structure is simple, the inner mold is conveniently removed, the labor intensity of workers is reduced, and the work efficiency is improved.

Description of drawings

Fig. 1 is the utility model cross-sectional structure schematic diagram;

Fig. 2 is a schematic diagram of the longitudinal section of the utility model;

Fig. 3 is the structural representation of upper hinge point;

Fig. 4 is the structural representation of lower hinge point;

Fig. 5 is the structural representation of pull ring;

Fig. 6 is a structural schematic diagram of a rotating shaft;

In the figure: 1-inner mold one, 2-inner mold two, 3-inner mold three, 4-inner mold four, 5-rotating shaft, 6-upper support rod, 7-lower support rod, 8-upper hinge point, 9 -Hinge point, 10-pull rod, 11-pull ring.

Detailed ways

As shown in Figures 1 and 2, a rotating shaft type box girder inner formwork includes a left half auxiliary formwork, a right half auxiliary formwork, an upper support rod 6, a lower support rod 7, an upper hinge point 8, a lower hinge point 9, and a tie rod 10. And draw ring 11, the left half sub-formwork comprises inner mold one 1 and inner mold two 2, the lower end of inner mold one 1 is connected with the upper end of inner mold two 2 by rotating shaft 5, the right half sub-formwork comprises inner mold three 3 and inner mold Four 4, the lower end of inner mold three 3 and the upper end of inner mold four 4 are connected by rotating shaft 5, the upper end and the lower end of the left half auxiliary template are respectively connected with the upper end and the lower end of the right half auxiliary template, inner mold one 1 and inner mold three The upper end of 3 is respectively provided with upper hinge point 8, and the lower end of inner mold two 2 and inner mold four 4 is respectively provided with lower hinge point 9, and upper hinge point 8 and lower hinge point 9 are vertically arranged respectively, and the upper end of upper support rod 6 is connected with The upper hinge point 8 is connected by bolts, and the lower end of the lower support rod 7 is connected with the lower hinge point 9 by bolts. The lower end of the upper support rod 6 and the upper end of the lower support rod 7 are connected by bolts, and one end of the pull rod 10 is provided with a pull ring 11 .

Concrete making of the utility model:

1) For the production of inner mold 1 and inner mold 2, [8 channel steel is used as the skeleton, the length of each channel steel is determined according to the size of the inner mold of the box girder, and δ6 steel plate is used as the panel. After the materials are ready, weld the panel and the skeleton, and make a connection hole of φ18. The inner mold one and the inner mold two are connected by a rotating shaft.

2) For the production of inner mold 3 and inner mold 4, [8] channel steel is used as the skeleton, the length of each channel steel is determined according to the size of the inner mold of the box girder, and δ6 steel plate is used as the panel. After the materials are ready, weld the panel and the skeleton, and make a connection hole of φ18. Internal mold three and internal mold four are connected by rotating shaft.

3) The upper twist point and the lower twist point are made by welding the channel steel in [6] and the steel plate together, as shown in Figure 3 and 4.

4) For the production of the pull ring, use φ28 rebar with a length of 60cm, and bend it from the middle of the rebar into a semicircular structure with a radius of 11.2cm, as shown in Figure 5.

5) For the manufacture of the rotating shaft structure, divide the steel pipe with a diameter of 4.8cm into two sections with a length of 4cm and one section with a length of 8cm, and weld the steel pipes with a length of 4cm to the inner mold 1 and inner mold 3 respectively. The 8cm steel pipe is welded to the inner mold two and the inner mold four, as shown in Figure 6.

6) For the manufacture of the upper support rod and the lower support rod, use [8 channel steel with a length of 60cm, and connect the two ends with bolts.

Claims (1)

1. A shaft-type box girder inner mold, characterized in that: it includes a left half auxiliary formwork, a right half auxiliary formwork, an upper support rod (6), a lower support rod (7), an upper hinge point (8), and a lower hinge point (9), pull rod (10) and pull ring (11), the left half secondary formwork includes inner mold one (1) and inner mold two (2), the lower end of inner mold one (1) and inner mold two (2) The upper end is connected by a rotating shaft (5), the right half of the secondary formwork includes inner mold three (3) and inner mold four (4), the lower end of inner mold three (3) and the upper end of inner mold four (4) are connected by rotating shaft (5) , the upper end and the lower end of the left half of the auxiliary formwork are respectively connected with the upper and lower ends of the right half of the auxiliary formwork, the upper ends of the inner mold one (1) and the inner mold three (3) are respectively provided with upper hinge points (8), and the inner mold two (2) and the lower ends of the inner mold four (4) are respectively provided with a lower hinge point (9), and the upper hinge point (8) and the lower hinge point (9) are vertically arranged respectively, and the upper end of the upper support rod (6) is connected with the upper hinge point The point (8) is connected by bolts, the lower end of the lower support rod (7) is connected with the lower hinge point (9) by bolts, the pull rod (10) is arranged on the lower end of the upper support rod (6), and is connected with the upper support rod (6) Vertical to the lower support rod (7), the tie rod (10), the lower end of the upper support rod (6) and the upper end of the lower support rod (7) are connected by bolts, and one end of the pull rod (10) is provided with a pull ring (11) .