Hydraulic inner form for precast box girder

Abstract

The utility model discloses a hydraulic inner mould for prefabricated box girder, and its component includes left bottom die and right bottom die, the fixed plate is fixedly installed on the left bottom die, the right end hinged connection of fixed plate has the connecting plate, the other end of connecting plate is hinged with right bottom die, the top of left bottom die is hinged together with left top die, the top of right bottom die is hinged together with right top die, the fixed plate is fixedly installed on right bottom die, and the oil cylinder seat is hinged with oil cylinder no.

Description

Technical Field

[0001] This utility model relates to a beam yard construction device for engineering construction, and more particularly to a hydraulic inner mold for precast box girders. Background Technology

[0002] The existing prefabricated inner molds for highway small box girders are generally assembled by the construction unit using steel welding near the construction site according to their needs. After the inner mold is assembled and the beam body is manufactured, it is necessary to separate the beam body from the inner mold. This usually requires the inner mold to be pulled out in sections using a winch. During the pulling process, friction occurs between the inner mold and the beam body, which often damages the inner mold. Manual repair and adjustment of the inner mold dimensions are required. The segmented pulling of the inner mold requires a lot of manual assembly, disassembly, and restoration of working dimensions, which is difficult and not conducive to improving product quality and production efficiency. Summary of the Invention

[0003] To solve the above problems, the technical solution of this utility model is: a hydraulic inner mold for precast box girders, comprising a left bottom mold and a right bottom mold. A fixing plate is fixedly installed on the left bottom mold, and a connecting plate is hinged to the right end of the fixing plate. The other end of the connecting plate is hinged to the right bottom mold. The top end of the left bottom mold is hinged to the left top mold, and the top end of the right bottom mold is hinged to the right top mold. A cylinder seat is fixedly installed on the right bottom mold, and a first cylinder and a second cylinder are hinged to the cylinder seat. The piston end of the first cylinder is hinged to the left bottom mold, and the piston end of the second cylinder is hinged to the right top mold. A third cylinder is also hinged to the left bottom mold, and the other end of the third cylinder is hinged to the left top mold.

[0004] The beneficial effects of this utility model are: after the beam body is manufactured, the left bottom mold, left top mold and right top mold can be contracted by hydraulic cylinder one, hydraulic cylinder two and hydraulic cylinder three, so that the outer surface of the mold is less in contact with the inner surface of the box girder, making it easier for the hydraulic inner mold to be demolded from the box girder without damaging the inner mold, and accurately restoring it to the working size, which is conducive to improving product quality and production efficiency. Attached Figure Description

[0005] Figure 1 This is a schematic diagram of the mold-closed state structure of this utility model.

[0006] Figure 2 This is a schematic diagram of the structure in the contracted state of this utility model.

[0007] In the diagram: left top mold 1, left bottom mold 2, fixed plate 3, hydraulic cylinder 1 4, right bottom mold 5, connecting plate 6, hydraulic cylinder seat 7, hydraulic cylinder 2 8, right top mold 9, hydraulic cylinder 3 10. Detailed Implementation

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0009] exist Figures 1 to 2 A hydraulic inner mold for precast box girders comprises a left bottom mold 2 and a right bottom mold 5. A fixing plate 3 is fixedly installed on the left bottom mold 2. A connecting plate 6 is hinged to the right end of the fixing plate 3. The other end of the connecting plate 6 is hinged to the right bottom mold 5. The top end of the left bottom mold 2 is hinged to the left top mold 1. The top end of the right bottom mold 5 is hinged to the right top mold 9. A cylinder seat 7 is fixedly installed on the right bottom mold 5. A first cylinder 4 and a second cylinder 8 are hinged to the cylinder seat 7. The piston end of the first cylinder 4 is hinged to the left bottom mold 2. The piston end of the second cylinder 8 is hinged to the right top mold 9. A third cylinder 10 is also hinged to the left bottom mold 2. The other end of the third cylinder 10 is hinged to the left top mold 1.

[0010] During demolding, cylinder 310 retracts first, causing the left top mold 1 to fold inward; cylinder 28 retracts, causing the right top mold 9 to fold inward; cylinder 14 retracts, causing the left bottom mold 2 to move towards the right bottom mold 5. At this time, most of the outer surface of the hydraulic inner mold is no longer in contact with the inner surface of the box girder, which allows for better separation of the two.

[0011] When the mold is closed, the left top mold 1, left bottom mold 2, right bottom mold 5, and right top mold 9 form a structure with a trapezoidal cross section.

[0012] In the description of this utility model, it should be understood that the terms "bottom", "one end", "middle", "other end", "upper", "side", "top", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0013] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic inner mold for precast box girders, comprising a left bottom mold (2) and a right bottom mold (5), characterized in that: A fixing plate (3) is fixedly installed on the left bottom mold (2). A connecting plate (6) is hinged to the right end of the fixing plate (3). The other end of the connecting plate (6) is hinged to the right bottom mold (5). The top end of the left bottom mold (2) is hinged to the left top mold (1). The top end of the right bottom mold (5) is hinged to the right top mold (9). A cylinder seat (7) is fixedly installed on the right bottom mold (5). A cylinder one (4) and a cylinder two (8) are hinged on the cylinder seat (7). The piston end of the cylinder one (4) is hinged to the left bottom mold (2). The piston end of the cylinder two (8) is hinged to the right top mold (9). A cylinder three (10) is also hinged on the left bottom mold (2). The other end of the cylinder three (10) is hinged to the left top mold (1).

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