Hydraulic internal mold for prefabricated box girder

Abstract

The utility model relates to the technical field of building construction, in particular to a prefabricated box girder hydraulic internal mold which comprises a hydraulic internal mold body, and the hydraulic internal mold body comprises a wide-body mold plate, a variable-diameter mold plate and a narrow-body mold plate which are sequentially arranged in the length direction. Each of the wide-body template, the variable-diameter template and the narrow-body template comprises a bottom plate and two inner mold structures which are bilaterally symmetrically arranged relative to the bottom plate, each inner mold structure comprises an upper movable mold and a lower movable mold, the upper movable mold and the lower movable mold are hinged through a lug plate, the lower movable mold is provided with a hinged oil cylinder capable of turning over the upper movable mold, and the upper movable mold and the lower movable mold are hinged through a lug plate. The two lower moving dies which are symmetrically arranged can move towards each other or away from each other through a translation oil cylinder and a guide device, a sliding seat is further included, a roller is arranged on the sliding seat, and a jacking oil cylinder is arranged between the roller and the guide device. The problems that an existing box girder inner formwork is tedious in formwork removal process, and the construction efficiency is affected are solved, the formwork removal efficiency is greatly improved, and therefore the production efficiency of a prefabricated box girder is improved.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a hydraulic inner mold for precast box girders. Background Technology

[0002] Currently, Chinese patent number CN202321799803.9 discloses a hydraulic inner mold for highway box girders, including a hydraulic inner mold structure. The hydraulic inner mold structure has an internal cavity, and a fixed template is provided on the inner side wall of the cavity. The fixed template has a groove, and a movable template is provided at the top of the fixed template. A first connecting plate is provided at the top of the fixed template, and a first rotating groove is provided at the end of the first connecting plate away from the fixed template. A second connecting plate is provided at the end of the movable template near the fixed template, and a second rotating groove is provided at the end of the second connecting plate away from the movable template. A locking tooth is provided at the corner of the locking plate near the fixed template. This utility model, through its hydraulic inner mold structure, internal cavity, fixed template, movable template, first rotating rod, connecting rod, second rotating rod, locking plate, locking tooth, hydraulic cylinder, and insert plate, can achieve the closing and closing of inner molds for box girders of different specifications, increasing the applicability of the device and improving the forming effect of box girders. However, in actual use, the demolding process is still cumbersome, affecting construction efficiency. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model proposes a hydraulic inner mold for precast box girders.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic inner mold for precast box girders, comprising a hydraulic inner mold, wherein the hydraulic inner mold comprises a wide-body template, a variable-diameter template, and a narrow-body template arranged sequentially along the length direction, wherein the wide-body template, the variable-diameter template, and the narrow-body template each comprise a base plate and two inner mold structures symmetrically arranged on the left and right sides of the base plate, wherein the inner mold structure comprises an upper moving mold and a lower moving mold, wherein the upper moving mold and the lower moving mold are hinged together by an ear plate, and the lower moving mold is provided with a hinged hydraulic cylinder capable of flipping the upper moving mold, wherein the two symmetrically arranged lower moving molds are connected by a translation hydraulic cylinder and a guide device so that they can move toward each other or away from each other, and further comprising a slide block, wherein the slide block is provided with rollers, and a lifting hydraulic cylinder is provided between the rollers and the guide device.

[0005] In a further improvement, the slide block and the base plate are spaced apart.

[0006] In a further improvement, the articulated cylinder is hinged to the lower moving mold, and the piston rod of the articulated cylinder is hinged to the upper moving mold.

[0007] In a further improvement, the guiding device includes a guide cylinder and guide columns slidably disposed at both ends of the guide cylinder. The free ends of the guide columns are disposed on the lower moving mold. The lifting cylinder is disposed on the guide cylinder, and the piston rod of the lifting cylinder is disposed on the roller.

[0008] In a further improvement, the lifting cylinder is radially inserted into the guide cylinder, and the free end of the guide column is provided with a relief groove, the shape of which is adapted to the outer periphery of the lifting cylinder.

[0009] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This utility model greatly improves the demolding efficiency by adding a translation cylinder, a lifting cylinder, a sliding seat, and rollers, thereby improving the production efficiency of precast box girders. Due to the structural design of the hydraulic inner mold, the opening, closing, positioning, and adjustment of the inner mold structure are more rapid and accurate, while reducing labor intensity and operational difficulty. The hydraulic system has a high degree of automation, reducing manual operation and improving operational safety. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a top view of the hydraulic inner mold of this utility model;

[0012] Figure 3 This is a partial structural schematic diagram of the hydraulic inner diaphragm of this utility model;

[0013] Figure 4 This is a schematic diagram of the guiding device of this utility model.

[0014] icon:

[0015] 1. Box girder; 21. Wide-body formwork; 22. Variable-diameter formwork; 23. Narrow-body formwork; 201. Base plate; 202. Upper moving formwork; 203. Lower moving formwork; 204. Ear plate; 3. Hinge cylinder; 4. Translation cylinder; 5. Lifting cylinder; 6. Guide device; 61. Guide cylinder; 62. Guide column; 621. Relief groove; 71. Slide seat; 72. Roller. Detailed Implementation

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0017] refer to Figure 1-4This embodiment provides a hydraulic inner mold for a precast box girder, including a hydraulic inner mold comprising a wide-body template 21, a variable-diameter template 22, and a narrow-body template 23 arranged sequentially along the length direction. Each of the wide-body template 21, variable-diameter template 22, and narrow-body template 23 includes a base plate 201 and two inner mold structures symmetrically arranged relative to the base plate 201. The inner mold structure includes an upper moving mold 202 and a lower moving mold 203, which are hinged together by an ear plate 204. The lower moving mold 203 is equipped with a hinge cylinder 3 capable of flipping the upper moving mold 202; that is, the hinge cylinder 3 is hinged to the lower moving mold 203, and the piston rod of the hinge cylinder 3 is hinged to the upper moving mold 202, arranged symmetrically. The two lower moving molds 203 are connected by a translation cylinder 4 and a guide device 6, which allow them to move towards or away from each other. The guide device 6 includes a guide cylinder 61 and guide posts 62 slidably disposed at both ends of the guide cylinder 61. The free ends of the guide posts 62 are disposed on the lower moving molds 203. The lifting cylinder 5 is disposed on the guide cylinder 61, and the piston rod of the lifting cylinder 5 is disposed on the roller 72. The lifting cylinder 5 is radially inserted into the guide cylinder 61. The free end of the guide post 62 is provided with a relief groove 621. The shape of the relief groove 621 is adapted to the outer periphery of the lifting cylinder 5 to avoid the presence of the lifting cylinder 5 affecting the formation of the guide post 62, thereby ensuring the stability and reliability of the hydraulic inner mold during use.

[0018] In this embodiment, a slide block 71 is also included. The slide block 71 is supported by an external device. The slide block 71 is spaced apart from the base plate 201. The slide block 71 is provided with rollers 72. A lifting cylinder 5 is provided between the rollers 72 and the guide device 6.

[0019] In this embodiment, each cylinder of the entire inner mold structure is powered by a hydraulic station, which includes an oil pump, an oil tank, control valves, etc., to ensure that each movement of the hydraulic inner mold can be executed smoothly and accurately.

[0020] In practical applications, the number of articulated cylinders 3, translation cylinders 4 and lifting cylinders 5 can be flexibly configured according to the size and design requirements of the precast box girder 1 to ensure that the entire hydraulic inner mold can operate efficiently and stably.

[0021] In this invention, after the box girder 1 is cast and formed, during demolding, the hinge cylinder 3 is activated, causing the upper moving mold 202 and the lower moving mold 203 to rotate downwards. Then, the translation cylinder 4 is activated, bringing the two inner mold structures closer together. After that, the lifting cylinder 5 is activated, causing the entire inner mold body to rise. At this time, the inner mold body is completely separated from the inner cavity of the box girder 1, and the entire inner mold body can be easily moved out of the inner cavity of the box girder 1 via the track. Finally, the bottom plate 201 is removed.

[0022] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A hydraulic inner mold for precast box girders, comprising a hydraulic inner mold, wherein the hydraulic inner mold includes a wide-body template, a variable-diameter template, and a narrow-body template arranged sequentially along the length direction, characterized in that: The wide-body template, variable-diameter template, and narrow-body template all include a base plate and two inner mold structures symmetrically arranged on the left and right sides of the base plate. The inner mold structure includes an upper moving mold and a lower moving mold, which are hinged together by an ear plate. The lower moving mold is equipped with a hinge cylinder that can flip the upper moving mold. The two symmetrically arranged lower moving molds are connected by a translation cylinder and a guide device so that they can move towards each other or away from each other. It also includes a slide block with rollers on it. A lifting cylinder is provided between the rollers and the guide device.

2. The hydraulic inner mold for a precast box girder according to claim 1, characterized in that: The slide block and the base plate are spaced apart.

3. The hydraulic inner mold for a precast box girder according to claim 1, characterized in that: The hinge cylinder is hinged to the lower moving mold, and the piston rod of the hinge cylinder is hinged to the upper moving mold.

4. The hydraulic inner mold for a precast box girder according to claim 1, characterized in that: The guiding device includes a guide cylinder and guide columns slidably disposed at both ends of the guide cylinder. The free ends of the guide columns are disposed on the lower moving mold. The lifting cylinder is disposed on the guide cylinder, and the piston rod of the lifting cylinder is disposed on the roller.

5. The hydraulic inner mold for a precast box girder according to claim 4, characterized in that: The lifting cylinder is radially inserted into the guide cylinder, and the free end of the guide column is provided with a relief groove, the shape of which is adapted to the outer periphery of the lifting cylinder.

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