Quick-release prefabricated concrete small box girder high-strength inner steel formwork

Abstract

The utility model belongs to prefabricated box girder technical field and provide a kind of quick-release prefabricated concrete small box girder high-strength inner steel formwork, it includes: left formwork, right formwork, deformation support and positioning frame, left formwork and right formwork are constituted by upper movable die and lower movable die, upper movable die bottom and lower movable die top articulate, to make upper movable die top rotate inward to reduce the size of left formwork or right formwork, deformation support is vertically set between upper movable die and lower movable die, and deformation support includes: upper support pole, lower support pole and push-pull plate, the lower end of upper support pole and the upper end of lower support pole articulate, and the upper end of upper support pole and the lower end of lower support pole are movably connected with upper movable die and lower movable die respectively.The utility model improves the support positioning structure of traditional pure mechanical inner mould, does not need to use a large number of bolts to position again, realizes the appearance of inner mould fast to prop up, ensures the forming speed of box girder hollow cavity, strengthens the stability of inner support simultaneously, to eliminate security risk.

Description

Technical Field

[0001] This utility model belongs to the field of precast box girder technology, specifically relating to a quick-release precast concrete small box girder high-strength inner steel formwork. Background Technology

[0002] Concrete box girders are widely used in the construction of bridges, culverts and other projects. The inside of a concrete box girder is hollow, and an inner mold is needed to form the hollow cavity during the pouring process. The hollow concrete box girder is formed by pouring concrete outside the inner mold.

[0003] Traditional internal molds commonly include fully automatic hydraulic molds and purely mechanical molds. Due to the high price and maintenance costs of fully automatic hydraulic molds, purely mechanical molds are more widely used. However, since traditional purely mechanical molds require manual disassembly and positioning, it is necessary to ensure the stability of the overall structure of the purely mechanical mold to protect the personal safety of workers.

[0004] Currently, the traditional purely mechanical inner mold support and positioning method is too cumbersome, requiring a large number of bolts for connection and fixation, resulting in extremely low disassembly and assembly efficiency and extremely high labor intensity for workers. This makes it impossible to quickly support and fix the shape of the inner mold, reducing the forming speed of the box girder's hollow cavity, and also makes it impossible to quickly reduce the size of the inner mold, thus reducing the speed at which the inner mold is extracted from the box girder's hollow cavity.

[0005] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0006] The purpose of this invention is to overcome the problem that the support and positioning of traditional purely mechanical inner molds requires a large number of bolts for connection and fixation, and to provide a quick-release high-strength inner steel formwork for precast concrete small box girders.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A quick-release precast concrete small box girder high-strength internal steel formwork includes: a left formwork, a right formwork, a deformation support, and a positioning frame. Both the left and right formworks are composed of an upper movable mold and a lower movable mold. The bottom of the upper movable mold is hinged to the top of the lower movable mold, allowing the top of the upper movable mold to rotate inward to reduce the size of the left or right formwork. The deformation support is erected between the upper and lower movable molds and includes: an upper support rod, a lower support rod, and a push-pull plate. The lower end of the upper support rod is hinged to the upper end of the lower support rod. The upper end of the upper support rod and the lower end of the lower support rod are movably connected to the upper and lower movable molds, respectively. The push-pull plate is horizontally positioned along the length of the formwork. The upper moving mold is located within the left or right template and is connected to it via the hinge shafts of the upper and lower support rods. The push-pull plate laterally displaces the hinged ends of the upper and lower support rods, causing them to swing forward or backward, thereby pulling down or supporting the upper moving mold. The positioning frame includes a cover plate and a positioning plate. One side of the cover plate is hinged to the top of the push-pull plate, and the positioning plate is located on the other side of the cover plate. By rotating the cover plate, the positioning plate is moved to the middle of one side of the deformable support, so that the positioning plate simultaneously contacts the lower end of the upper support rod and the upper end of the lower support rod to restrict its movement. The joint between the left and right templates is connected by a connecting frame.

[0009] In the quick-release precast concrete small box girder high-strength inner steel formwork described above, preferably, the inner sides of the ends of the left formwork and the right formwork are provided with connecting plates along the edges.

[0010] The connecting plate has mounting holes on its surface to connect multiple template sections into one piece.

[0011] The connecting plate is disconnected from the hinge joint between the upper moving mold and the lower moving mold.

[0012] Preferably, pull rings are provided at both ends of the push-pull plate.

[0013] Preferably, the push-pull plate directly corresponds to the hinge point between the upper moving mold and the lower moving mold.

[0014] Preferably, the upper end of the upper support rod and the lower end of the lower support rod are both hinged to a steering seat, and the steering seat is hinged to the upper moving mold or the lower moving mold, and the rotation direction of the steering seat is perpendicular to the rotation direction of the upper support rod or the lower support rod.

[0015] Preferably, both the left and right templates have ribs along their edges inside, and the ribs are disconnected from the hinge point of the upper and lower moving molds.

[0016] Preferably, the connecting frame includes a main board and a support plate, wherein the main board is horizontally disposed inside the joint between the left template and the right template.

[0017] Preferably, the support plates extend horizontally from both sides of the motherboard;

[0018] The end of the support plate is attached to and connected to one side of the corresponding rib plate.

[0019] Preferably, a reinforcing plate is connected to the end of the support plate.

[0020] Preferably, the side of the push-pull plate is provided with a limiting hole;

[0021] One end of the reinforcing plate connected to the support plate can be rotated so that the other end of the reinforcing plate is inserted into the limiting hole.

[0022] Beneficial effects: This utility model improves the support and positioning structure of the traditional purely mechanical inner mold, eliminating the need for a large number of bolts for positioning. It enables the rapid support of the inner mold's shape, ensuring the forming speed of the box girder's hollow cavity. At the same time, it enhances the stability of the inner support to eliminate safety hazards. It also enables the rapid reduction of the inner mold's size to speed up the removal of the inner mold from the box girder's hollow cavity and improve work efficiency. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0024] Figure 1 This is a front view schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the overall structure of the left template of this utility model;

[0027] Figure 4 This is an overall schematic diagram of the right template structure of this utility model;

[0028] Figure 5 This is a schematic diagram showing the vertical unfolding of the push-pull plate and positioning plate structure of this utility model;

[0029] Figure 6 This is a schematic diagram showing the upper and lower unfolded structure of the push-pull plate and connecting frame of this utility model.

[0030] In the diagram: 1. Upper moving mold; 2. Lower moving mold; 3. Upper support rod; 4. Lower support rod; 5. Push-pull plate; 6. Cover plate; 7. Positioning plate; 8. Connecting plate; 9. Steering seat; 10. Rib plate; 11. Main plate; 12. Support plate; 13. Reinforcing plate; 14. Limiting hole. Detailed Implementation

[0031] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0032] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0034] This embodiment aims to provide a quick-release precast concrete small box girder high-strength inner steel formwork, whose main function is to replace the bolt positioning structure in another way to achieve rapid support for the shape of the inner formwork and rapid reduction of the size of the inner formwork.

[0035] Reference Figures 1-4 It includes: a left template, a right template, a deformation bracket, and a positioning frame. Similar to traditional inner molds, both the left and right templates are composed of an upper moving mold 1 and a lower moving mold 2. The bottom of the upper moving mold 1 is hinged to the top of the lower moving mold 2, so that the top of the upper moving mold 1 can rotate inward to reduce the size of the left or right template. A connecting plate 8 is welded along the edge on the inner side of the ends of the left and right templates. The surface of the connecting plate 8 is provided with mounting holes for mounting bolts. Multiple template sections are connected as one unit through the connecting plate 8, and the connecting plate 8 is disconnected from the hinge of the upper moving mold 1 and the lower moving mold 2 to avoid interference with the rotation of the upper moving mold 1.

[0036] Ribs 10 are welded along the edges inside both the left and right templates. The ribs 10 are disconnected from the hinge of the upper moving mold 1 and the lower moving mold 2 to avoid interference with the rotation of the upper moving mold 1. Multiple ribs 10 are evenly spaced along the length of the left or right template.

[0037] Both the left and right templates are equipped with deformation supports, which are erected between the upper moving mold 1 and the lower moving mold 2. Multiple deformation supports are evenly spaced along the length of the left or right template, with each support located between two adjacent ribs 10. Each deformation support includes an upper support rod 3, a lower support rod 4, and a push-pull plate 5. The lower end of the upper support rod 3 is hinged to the upper end of the lower support rod 4. The upper ends of the upper support rod 3 and the lower ends of the lower support rod 4 are movably connected to the upper moving mold 1 and the lower moving mold 2, respectively. The push-pull plate 5 is horizontally positioned within the left or right template along its length and is connected to the upper support rod 3 and the lower support rod 4 via a hinge. The connecting shaft is integrated with it. The push-pull plate 5 directly corresponds to the hinge of the upper moving mold 1 and the lower moving mold 2. Specifically, the upper end of the upper support rod 3 and the lower end of the lower support rod 4 are both hinged with a steering seat 9. The steering seat 9 is also hinged to the upper moving mold 1 or the lower moving mold 2. The rotation direction of the steering seat 9 is perpendicular to the rotation direction of the upper support rod 3 or the lower support rod 4. Both ends of the push-pull plate 5 are provided with pull rings. The pull rings facilitate the lateral displacement of the push-pull plate 5 by the winch, so as to pull the hinge ends of the upper support rod 3 and the lower support rod 4 to swing forward or backward synchronously, thereby pulling down or supporting the upper moving mold 1 to realize the reduction of the size of the inner mold or to support the outer shape of the inner mold.

[0038] Reference Figures 3-5 The positioning frame includes a cover plate 6 and a positioning plate 7. One side of the cover plate 6 is hinged to the top of the push-pull plate 5, and the positioning plate 7 is welded to the other side of the cover plate 6. The two ends of the cover plate 6 can be flush with the two ends of the push-pull plate 5. By rotating the cover plate 6, the positioning plate 7 can be moved to the middle of one side of the deformable bracket, so that the positioning plate 7 simultaneously contacts the lower end of the upper support rod 3 and the upper end of the lower support rod 4 to restrict its movement, thereby keeping the deformable bracket in a vertical state. The positioning plate 7 is provided in multiple sets along the length of the cover plate 6 corresponding to the deformable bracket, with two in each set to fit against both sides of the deformable bracket. The traditional positioning method for this part is to fix the lower end of the upper support rod 3 and the upper end of the lower support rod 4 with bolts. Since there are many deformable brackets, workers need to frequently install bolts, which is extremely laborious. Therefore, it is necessary to improve the positioning method of the deformable bracket.

[0039] Reference Figures 2-6 The upper and lower joints of the left and right templates are connected as one unit by a connecting frame, which includes a main board 11 and a support plate 12. The main board 11 is horizontally arranged inside the joint of the left and right templates. Support plates 12 extend horizontally on both sides of the main board 11, and the number of support plates 12 is evenly distributed along the length of the main board 11. The end of the support plate 12 can be widened to cover one side of the corresponding rib plate 10 and connected to it by bolts.

[0040] In this embodiment, the side of the push-pull plate 5 is provided with limiting holes 14, and multiple limiting holes 14 are evenly spaced along the length of the push-pull plate 5. Each limiting hole 14 is located between two adjacent deformable supports. The end of the support plate 12 of the connecting frame located below is connected to a reinforcing plate 13. One end of the reinforcing plate 13 is connected to the end of the corresponding support plate 12 and the rib plate 10 by bolts, and the other end extends toward the push-pull plate 5. Before the end of the support plate 12 is fastened to the rib plate 10 by bolts, the reinforcing plate 13 can be rotated so that its swing end is inserted into the limiting hole 14, thereby limiting the front and rear displacement of the push-pull plate 5. By working together with the positioning plate 7, the deformable support is stabilized to prevent deformation and eliminate safety hazards.

[0041] In actual use, the upper moving molds 1 of the left and right templates are first lifted upward by pulling the push-pull plate 5. At this time, the deformable support becomes vertical. The rotating cover plate 6 moves the positioning plate 7 to the side of the deformable support to limit its deformation and stabilize its support state. Then, the upper and lower moving molds 2 of the left and right templates are joined together, and the upper and lower joints of the left and right templates are fixed by the connecting frame. During this period, before the connecting frame below is completely fastened to the rib plate 10, the reinforcing plate 13 is rotated so that its swing end is inserted into the limiting hole 14 on the push-pull plate 5 to limit its lateral displacement. This allows the reinforcing plate 13 and the positioning plate 7 to work together to stabilize the deformable support and enhance its stability.

[0042] The internal steel formwork provided in this embodiment improves the support and positioning structure of traditional purely mechanical internal formwork, eliminating the need for a large number of bolts for positioning. It enables rapid support of the internal formwork's shape, ensuring the forming speed of the box girder's hollow cavity, while enhancing the stability of the internal support to eliminate safety hazards. It also enables rapid reduction of the internal formwork's size to accelerate the removal of the internal formwork from the box girder's hollow cavity and improve work efficiency.

[0043] It is understood that the above description is merely exemplary and the embodiments of this application do not limit the scope of the application.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. A high-strength inner steel formwork for prefabricated concrete small box girder with quick release, comprising: A left template and a right template, each composed of an upper moving mold and a lower moving mold, wherein the bottom of the upper moving mold is hinged to the top of the lower moving mold, so that the top of the upper moving mold rotates inward to reduce the size of the left template or the right template, characterized in that it includes: A deformable support is erected between the upper moving mold and the lower moving mold. The deformable support includes an upper support rod, a lower support rod, and a push-pull plate. The lower end of the upper support rod is hinged to the upper end of the lower support rod. The upper end of the upper support rod and the lower end of the lower support rod are respectively movably connected to the upper moving mold and the lower moving mold. The push-pull plate is horizontally arranged in the left or right template along the length of the template and is connected to it as a whole through the hinge axis of the upper and lower support rods. The lateral displacement of the push-pull plate pulls the hinge ends of the upper and lower support rods to swing forward or backward, thereby pulling down or supporting the upper moving mold. The positioning frame includes a cover plate and a positioning plate. One side of the cover plate is hinged to the top of the push-pull plate, and the positioning plate is located on the other side of the cover plate. By rotating the cover plate, the positioning plate is moved to the middle of one side of the deformable bracket so that the positioning plate simultaneously contacts the lower end of the upper support rod and the upper end of the lower support rod to restrict its movement. The left template and the right template are connected as one unit by a connecting frame.

2. The quick-release prefabricated concrete small box girder high-strength inner steel formwork according to claim 1, characterized in that, Both the left template and the right template have connecting plates along their inner edges at their ends; The connecting plate has mounting holes on its surface to connect multiple template sections into one piece. The connecting plate is disconnected from the hinge joint between the upper moving mold and the lower moving mold.

3. The quick-release precast concrete small box girder high-strength inner steel formwork according to claim 1, characterized in that, Both ends of the push-pull plate are equipped with pull rings.

4. The quick-release precast concrete small box girder high-strength inner steel formwork according to claim 1, characterized in that, The push-pull plate directly corresponds to the hinge point between the upper moving mold and the lower moving mold.

5. The quick-release precast concrete small box girder high-strength inner steel formwork according to claim 1, characterized in that, The upper end of the upper support rod and the lower end of the lower support rod are both hinged to a steering seat, which is in turn hinged to the upper moving mold or the lower moving mold, and the rotation direction of the steering seat is perpendicular to the rotation direction of the upper support rod or the lower support rod.

6. The quick-release precast concrete small box girder high-strength inner steel formwork according to claim 1, characterized in that, Both the left and right templates have ribs along their edges inside, and the ribs are disconnected from the hinge point of the upper and lower moving molds.

7. The quick-release precast concrete small box girder high-strength inner steel formwork according to claim 6, characterized in that, The connecting frame includes a main board and a support plate, with the main board horizontally positioned inside the joint between the left template and the right template.

8. The quick-release precast concrete small box girder high-strength inner steel formwork according to claim 7, characterized in that, The support plates extend horizontally from both sides of the motherboard. The end of the support plate is attached to and connected to one side of the corresponding rib plate.

9. The quick-release precast concrete small box girder high-strength inner steel formwork according to claim 8, characterized in that, A reinforcing plate is connected to the end of the support plate.

10. The quick-release precast concrete small box girder high-strength inner steel formwork according to claim 9, characterized in that, The side of the push-pull plate is provided with a limiting hole; One end of the reinforcing plate connected to the support plate can be rotated so that the other end of the reinforcing plate is inserted into the limiting hole.

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