Internal mold shared by multiple sections of large box girder of high-speed rail

Abstract

The utility model discloses an internal mold shared by multiple sections of a large box girder of a high-speed rail, which is characterized in that support columns are fixedly mounted at the bottom in the box girder internal mold side by side, a sliding seat is detachably mounted above the support columns, a lifting pulley is mounted at the bottom of the sliding seat, a lifting seat is mounted at the upper part of the sliding seat, and first pushing oil cylinders are movably hinged to two ends of the top of a top mold; piston shafts of the first pushing oil cylinders are movably hinged to the side dies at the corresponding positions, second pushing oil cylinders are movably hinged to the lower portions of the side dies, and piston shafts of the second pushing oil cylinders are movably hinged to the corner dies at the corresponding positions. According to the box girder inner mold installation device, installation work of a box girder inner mold can be rapidly completed, the third pushing oil cylinder, the second pushing oil cylinder and the first pushing oil cylinder are started, the top mold descends, the side mold and the corner mold are overturned to be separated from the inner wall of a box girder, then the lifting type idler wheels make contact with the bottom plate, and at the moment, the sliding bases can rise to be separated from the supporting columns; and the sliding seat and the box girder inner mold can be integrally pulled out from the interior of the box girder, the dismounting efficiency is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of box girder formwork technology, and more specifically, to a shared inner mold for multiple sections of high-speed railway large box girders. Background Technology

[0002] The shared section of the inner formwork for large box girders refers to an inner formwork system designed to save materials, reduce costs, and improve construction efficiency in bridge construction. This system can be reused in multiple box girder segments. This design is commonly used in the construction of precast or cast-in-place box girders, especially in long-span bridges or projects that require a large number of box girders with the same cross-section.

[0003] Traditional precast box girder formwork includes wooden formwork and ordinary combined steel formwork, but all of these formworks have problems such as low assembly and disassembly efficiency and time-consuming and labor-intensive assembly and disassembly. In particular, the inner formwork of the box girder requires workers to crawl into the box girder to disassemble it, and after disassembly, the inner formwork also needs to be transferred out, which is labor-intensive. Utility Model Content

[0004] The purpose of this utility model is to provide a shared inner mold for multiple sections of a high-speed railway box girder that can be quickly installed, disassembled, and transferred.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A multi-section shared inner mold for a high-speed railway box girder includes an inner mold set inside the outer mold of the box girder. The inner mold includes a top mold, a bottom plate, and two side molds. The two side molds are respectively hinged to both ends of the top mold. Corner molds are hinged to the bottom of each side mold. Support columns are fixedly installed side by side at the bottom of the inner mold. The support columns penetrate the bottom plate, and a sliding block is detachably installed above the support columns. A lifting pulley is installed at the bottom of the sliding block, and a lifting seat is installed on the upper part of the sliding block. A first pushing cylinder is hinged to both ends of the top of the top mold. The piston shaft of the first pushing cylinder is hinged to the corresponding side mold. A second pushing cylinder is hinged to the lower part of the side mold. The piston shaft of the second pushing cylinder is hinged to the corresponding corner mold.

[0006] Preferably, the lifting pulley includes a support plate and two rollers, which are rotatably installed at both ends of the lower surface of the support plate. A fourth push cylinder is fixedly installed on the upper part of the slide block, and the piston shaft of the fourth push cylinder passes through the bottom of the slide block and is fixedly connected to the support plate.

[0007] Preferably, a third push cylinder is fixedly installed at both ends of the bottom of the lifting seat, and the lower end of the third push cylinder is fixedly connected to the slide.

[0008] Preferably, the top mold, side mold, and corner mold are all fixedly connected to the lifting seat and the sliding seat via adjusting screws.

[0009] Preferably, positioning sleeves are fixedly installed at both ends of the top of the slide block, and the positioning sleeves are engaged with the corresponding support columns.

[0010] Preferably, the outer end of the corner mold and both ends of the bottom plate are inclined.

[0011] Preferably, both ends of the upper part of the pallet are fixedly connected to the slide block via telescopic rods.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] This invention enables the rapid installation of the inner formwork of a box girder. After the concrete has solidified and cured, the third, second, and first jacking cylinders are activated to lower the top formwork, while the side and corner forms flip and detach from the inner wall of the box girder. Then, the lifting rollers contact the base plate, at which point the slide can rise and detach from the support column, facilitating the overall pulling of the slide and the inner formwork of the box girder out of the box girder, thus improving disassembly efficiency and reducing the labor intensity of workers. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional view of a shared inner mold for multiple sections of a high-speed railway large box girder according to this utility model;

[0016] Figure 2 This is a structural diagram of the slide block of this utility model;

[0017] Figure 3 yes Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0018] In the diagram: 1. Box girder outer formwork; 2. Box girder inner formwork; 21. Top formwork; 22. Side formwork; 23. Corner formwork; 3. Base plate; 4. Sliding seat; 41. Positioning sleeve; 5. Lifting seat; 51. First jacking cylinder; 52. Second jacking cylinder; 53. Third jacking cylinder; 6. Lifting pulley; 61. Support plate; 62. Roller; 63. Telescopic rod; 64. Fourth jacking cylinder; 7. Support column. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0020] See Figures 1-2 As shown, this utility model provides a shared inner mold for multiple sections of a high-speed railway box girder, including an inner mold 2 set inside the outer mold 1 of the box girder. The inner mold 2 inside the outer mold 1 is made of steel template. The inner mold 2 includes a top mold 21, a bottom plate 3, and two side molds 22. The two side molds 22 are respectively hinged to both ends of the top mold 21. Corner molds 23 are hinged to the bottom of each side mold 22. Support columns 7 are fixedly installed side by side at the bottom of the inner mold 2. The support columns 7 penetrate the bottom plate 3, and a slide block 4 is detachably installed above the support columns 7. A lifting pulley 6 is installed at the bottom of the slide block 4, and a lifting seat 5 is installed on the upper part of the slide block 4. A first pushing cylinder 51 is hinged to both ends of the top of the top mold 21. The piston shaft of the first pushing cylinder 51 is hinged to the corresponding side mold 22. A second pushing cylinder 52 is hinged to the lower part of the side mold 22. The piston shaft of the second pushing cylinder 52 is hinged to the corresponding corner mold 23.

[0021] In this embodiment, the lifting pulley 6 includes a support plate 61 and two rollers 62. The two rollers 62 are rotatably installed at both ends of the lower surface of the support plate 61. A fourth push cylinder 64 is fixedly installed on the upper part of the slide block 4. The piston shaft of the fourth push cylinder 64 passes through the bottom of the slide block 4 and is fixedly connected to the support plate 61.

[0022] In this embodiment, a third push cylinder 53 is fixedly installed at both ends of the bottom of the lifting seat 5, and the lower end of the third push cylinder 53 is fixedly connected to the slide seat 4.

[0023] To ensure the stability of the top mold 21, side mold 22, and corner mold 23 during concrete pouring, in this embodiment, the top mold 21, side mold 22, and corner mold 23 are all fixedly connected to the lifting seat 5 and the sliding seat 4 via adjusting screws.

[0024] Furthermore, in this embodiment, positioning sleeves 41 are fixedly installed at both ends of the top of the slide block 4. The positioning sleeves 41 are engaged with the corresponding support columns 7. Specifically, the upper end of the support column 7 is inserted into the positioning sleeve 41.

[0025] like Figure 3 As shown, further, in order to ensure that the corner mold 23 can smoothly detach from the end of the base plate 3 when the second push cylinder 52 retracts, in this embodiment, the outer end of the corner mold 23 and both ends of the base plate 3 are set in an inclined shape.

[0026] Furthermore, to improve the stability of the lifting and lowering of the pallet 61, in this embodiment, both ends of the upper part of the pallet 61 are fixedly connected to the slide block 4 through telescopic rods 63.

[0027] The specific operating steps are as follows: The base plate 3 is fixed to the bottom of the box girder outer formwork 1 by the support column 7. The contact part between the support column 7 and the base plate 3 is sealed by the sealing ring. Then, the slide block 4 is placed on the support column 7. By activating the third jacking cylinder 53, the second jacking cylinder 52 and the first jacking cylinder 51, the top formwork 21, the side formwork 22 and the corner formwork 23 reach the predetermined position to form a complete box girder inner formwork 2. Then, concrete is poured.

[0028] After the concrete has solidified and cured, the third jacking cylinder 53, the second jacking cylinder 52 and the first jacking cylinder 51 are activated to lower the top formwork 21, and the side formwork 22 and the corner formwork 23 are flipped and detached from the inner wall of the box girder. Then the fourth jacking cylinder 64 is activated to make the roller 62 contact the bottom plate 3. At this time, the slide 4 can be raised and detached from the support column 7. Then the slide 4 is connected to the winch, and the winch can pull the slide 4 out from the inside of the box girder.

[0029] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, the patent owner may make various modifications or alterations within the scope of the appended claims, as long as they do not exceed the protection scope described in the claims of the present invention, they shall all be within the protection scope of the present invention.

Claims

1. A shared inner mold for multiple sections of a high-speed railway large box girder, comprising an inner mold for the box girder disposed within the outer mold of the box girder, characterized in that: The box girder inner mold includes a top mold, a bottom plate, and two side molds. The two side molds are movably hinged to both ends of the top mold. Corner molds are movably hinged to the bottom of each side mold. Support columns are fixedly installed side by side at the bottom of the inner mold of the box girder. The support columns pass through the bottom plate, and a slide block is detachably installed above the support column. A lifting pulley is installed at the bottom of the slide block, and a lifting seat is installed on the top of the slide block. A first pushing cylinder is movably hinged to both ends of the top of the top mold. The piston shaft of the first pushing cylinder is movably hinged to the corresponding side mold. A second pushing cylinder is movably hinged to the lower part of the side mold. The piston shaft of the second pushing cylinder is movably hinged to the corresponding corner mold.

2. The shared inner mold for multiple sections of a high-speed railway large box girder according to claim 1, characterized in that: The lifting pulley includes a support plate and two rollers. The two rollers are rotatably installed at both ends of the lower surface of the support plate. A fourth push cylinder is fixedly installed on the upper part of the slide block. The piston shaft of the fourth push cylinder passes through the bottom of the slide block and is fixedly connected to the support plate.

3. The shared inner mold for multiple sections of a high-speed railway large box girder according to claim 1, characterized in that: A third push cylinder is fixedly installed at both ends of the bottom of the lifting seat, and the lower end of the third push cylinder is fixedly connected to the slide.

4. The shared inner mold for multiple sections of a high-speed railway large box girder according to claim 1, characterized in that: The top mold, side mold, and corner mold are all fixedly connected to the lifting seat and sliding seat via adjusting screws.

5. The shared inner mold for multiple sections of a high-speed railway large box girder according to claim 1, characterized in that: Positioning sleeves are fixedly installed at both ends of the top of the slide block, and the positioning sleeves are engaged with the corresponding support columns.

6. The shared inner mold for multiple sections of a high-speed railway large box girder according to claim 1, characterized in that: The outer end of the corner mold and both ends of the base plate are inclined.

7. The shared inner mold for multiple sections of a high-speed railway large box girder according to claim 2, characterized in that: Both ends of the upper part of the pallet are fixedly connected to the slide block by telescopic rods.

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