Prefabricated box girder hydraulic formwork

Abstract

The utility model relates to the technical field of prefabricated box girder pouring, and discloses a prefabricated box girder hydraulic formwork which comprises an outer formwork, a base is installed on the lower side of the outer formwork, a plurality of sets of supporting frames are connected between the upper side of the base and the outer formwork, an inner formwork is arranged on the inner side of the outer formwork and comprises a base, and side plates are rotationally connected to the two opposite sides of the base respectively. And a connecting plate is installed on the upper side of the middle of the base, and first cutting grooves matched with installation of the top plate are formed in the two opposite sides of the upper portion of the connecting plate correspondingly. Compared with the prior art, the inner mold has the advantages that the inner mold is composed of the base, the two side plates and the two top plates which are connected into a trapezoidal structure, the connecting blocks are located among the base, the two side plates and the two top plates, and the hydraulic structures are installed on the connecting blocks, so that the base, the side plates and the top plates can be separated from a prefabricated box girder in advance; and the winch can conveniently and stably pull the inner mold out of the prefabricated box girder, and the efficiency of pulling the inner mold out of the prefabricated box girder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated box beam casting, in particular to a prefabricated box beam hydraulic template. Background Art

[0002] A box girder is a type of beam used in bridge construction. It is hollow inside with flanges on both sides, resembling a box, hence its name. It can be either single-box or multi-box. Reinforced concrete box girders are categorized as precast or cast-in-place. Precast box girders are cast in a separate location and then erected using a bridge-erecting machine after the lower portion of the structure is completed. This accelerates construction progress and reduces time, leading to their widespread use.

[0003] At present, bridge box girders are prefabricated using formwork. Before pouring concrete, the inner and outer formwork need to be assembled. After pouring concrete, the formwork needs to be disassembled. The inner formwork is disassembled by using a winch to fix the wire rope to the end of the inner formwork, and then the inner formwork is pulled out of the prefabricated box girder through the continuous rotation of the winch. However, since the outer surface of the inner formwork is in direct contact with the inner wall surface of the prefabricated box girder, and the concrete will also produce a certain adhesion force to the inner formwork when solidifying, the inner formwork is a fixed structure and cannot be separated from the prefabricated box girder in advance. Therefore, the output power of the winch needs to be increased to stably pull the inner formwork out of the prefabricated box girder, which affects the efficiency of pulling the inner formwork out of the prefabricated box girder.

[0004] In response to the above technical problems, this application proposes a prefabricated box girder hydraulic formwork. Utility Model Content

[0005] 1. Technical Problems Solved

[0006] The technical problem to be solved by the present invention is that since the outer surface of the inner mold is in direct contact with the inner wall surface of the prefabricated box beam, the inner mold cannot be separated from the prefabricated box beam in advance, and the output power of the winch needs to be increased to be able to stably pull the inner mold out of the prefabricated box beam.

[0007] 2. Technical Solution

[0008] In order to solve the above technical problems, the technical solution provided by the utility model is: a prefabricated box beam hydraulic formwork, including an outer mold, a base is installed on the lower side of the outer mold, a plurality of support frames are connected between the upper side of the base and the outer mold, an inner mold is provided on the inner side of the outer mold, and the inner mold includes a base, the base is rotatably connected to side panels on opposite sides, a top plate is rotatably installed on the upper side of the side panel, a connecting plate is installed on the upper middle side of the base, and grooves are provided on opposite sides of the upper side of the connecting plate to cooperate with the installation of the top plate.

[0009] As an improvement, multiple sets of connecting ears 1 are installed on two opposite sides of the bottom of the base, multiple sets of connecting ears 2 that are rotatably connected to the connecting ears 1 are installed on the lower side of the side panel, a connecting shaft is installed on the upper side of the side panel, and a sleeve that is rotatably connected to the connecting shaft is installed on one side of the top plate.

[0010] As an improvement, multiple sets of limiting sliding frames are installed on the side of the side plate close to the connecting plate, and sliding rods are sliding inside the multiple sets of limiting sliding frames. Hydraulic rods are installed at both ends of the sliding rods, and the other end of the hydraulic rods is installed on the connecting plate.

[0011] As an improvement, a limiting strip is provided on the side of the base, and a slot is provided on the outer side of the lower portion of the side panel for the limiting strip to be snapped into.

[0012] As an improvement, multiple groups of hydraulic rods 2 are installed on the lower side of the connecting plate, and blocks are installed at the lower ends of the hydraulic rods 2. A through hole is provided at the bottom of the base for the blocks to pass through, and an elastic sealing frame is provided on the outside of the blocks.

[0013] As an improvement, a groove 2 is provided on the side of the lower side wall of the top plate close to the connecting plate, and multiple groups of limiting sliding frames 2 are installed at the bottom of the groove 2. Sliding rods 2 pass through the multiple groups of limiting sliding frames 2, and connecting blocks are respectively installed at both ends of the sliding rods 2, and a hydraulic rod 3 is installed on one side of the connecting block.

[0014] As an improvement, the sliding rod 2 and the connecting block are located inside the cutting groove 1, and the bottom of the cutting groove 1 is provided with an installation groove for matching the installation of the hydraulic rod 3.

[0015] As an improvement, an arc-shaped convex strip is installed on one side of the top plate close to the side plate, and the arc-shaped convex strip is located above the sleeve.

[0016] 3. Beneficial Effects

[0017] The advantages of the present invention compared with the prior art are that the inner mold is composed of a base, two groups of side panels and two groups of top panels, which are connected to form a trapezoidal structure; the connecting block is located between the base, the two groups of side panels and the two groups of top panels; a hydraulic structure is installed on the connecting block, which can enable the base, the side panels and the top panel to be separated from the prefabricated box beam in advance, making it easier for the winch to stably pull the inner mold out of the prefabricated box beam, thereby improving the efficiency of pulling the inner mold out of the prefabricated box beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of a structure of a prefabricated box beam hydraulic formwork.

[0019] Figure 2 The utility model is a schematic diagram of the inner mold structure of a prefabricated box beam hydraulic template.

[0020] Figure 3The utility model is a schematic diagram of the upper side structure of a base of a prefabricated box beam hydraulic formwork.

[0021] Figure 4 The utility model is a schematic diagram of the side plate structure of a prefabricated box beam hydraulic formwork.

[0022] Figure 5 The utility model is a schematic diagram of a slide rod-connecting structure of a prefabricated box beam hydraulic formwork.

[0023] Figure 6 The utility model is a schematic diagram of the upper structure of the top plate of a prefabricated box beam hydraulic formwork.

[0024] Figure 7 The utility model is a schematic diagram of the lower side structure of the top plate of a prefabricated box beam hydraulic formwork.

[0025] As shown in the figure: 1. Outer mold; 2. Base; 3. Support frame; 4. Base; 5. Side panel; 6. Top panel; 7. Connecting plate; 8. Connecting ear 1; 9. Connecting ear 2; 10. Limiting strip; 11. Slot; 12. Connecting shaft; 13. Sleeve; 14. Limiting slide frame 1; 15. Slide rod 1; 16. Hydraulic rod 1; 17. Hydraulic rod 2; 18. Stop block; 19. Elastic sealing frame; 20. Mounting groove; 21. Cutting groove 1; 22. Hydraulic rod 3; 23. Connecting block; 24. Slide rod 2; 25. Cutting groove 2; 26. Limiting slide frame 2; 27. Arc-shaped convex strip. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] As attached Figure 1 , Attachment Figure 3 , Attachment Figure 4 and attached Figure 6 As shown, a prefabricated box beam hydraulic formwork comprises an outer formwork 1, a base 2 is mounted on the lower side of the outer formwork 1, a plurality of support frames 3 are connected between the upper side of the base 2 and the outer formwork 1, an inner formwork is provided on the inner side of the outer formwork 1, and the inner formwork comprises a base 4, side panels 5 are rotatably connected to the opposite sides of the base 4, a top panel 6 is rotatably mounted on the upper side of the side panels 5, a connecting plate 7 is mounted on the upper side of the middle of the base 4, and grooves 21 are provided on the opposite sides of the upper portion of the connecting plate 7 for fitting with the top panel 6;

[0028] The bottom of the base 4 is provided with a plurality of connecting ears 8 on opposite sides thereof, and the lower side of the side panel 5 is provided with a plurality of connecting ears 9 rotatably sleeved with the connecting ears 8, so as to realize the rotational connection between the side panel 5 and the base 4. The upper side of the side panel 5 is provided with a connecting shaft 12, and one side of the top panel 6 is provided with a sleeve 13 rotatably sleeved with the connecting shaft 12, so as to realize the rotational connection between the top panel 6 and the side panel 5.

[0029] Through the above structure, the inner mold is placed inside the outer mold 1, and the inner mold and the outer mold 1 are connected at both ends by baffles. The baffles, the inner mold and the outer mold 1 are also used to limit the concrete. The top plate 6 rotates downward and can be separated from the upper side wall of the prefabricated box beam. The side plate 5 rotates toward the connecting plate 7 and can be separated from the side wall of the prefabricated box beam. The base 4 can move upward and can be separated from the bottom of the prefabricated box beam. The specific structure is as follows:

[0030] Combined with attachment Figure 3 , Attachment Figure 4 and attached Figure 7 As shown, a second groove 25 is provided on the side of the lower side wall of the top plate 6 close to the connecting plate 7, and multiple groups of limiting slide frames 26 are installed at the bottom of the second groove 25. Slide rods 24 are passed through the multiple groups of limiting slide frames 26. Connecting blocks 23 are respectively installed at both ends of the second slide rod 24. A hydraulic rod 3 22 is installed on one side of the connecting block 23. The second slide rod 24 and the connecting block 23 are located inside the first groove 21. The bottom of the first groove 21 is provided with a mounting groove 20 for matching the installation of the hydraulic rod 3 22.

[0031] Through the above structure, the top plate 6 is first disengaged, and multiple groups of hydraulic rods 3 22 are actuated simultaneously. The hydraulic rods 3 22 contract, driving the connecting block 23 and the slide bar 2 24 to move downward inside the groove 1 21. The slide bar 24 slides inside the limit slide frame 2 26, pulling multiple groups of limit slide frames 2 26 to move downward, thereby driving the top plate 6 to start disengaging from the top of the prefabricated box beam on the side close to the connecting plate 7, until the top plate 6 is completely disengaged from the top of the prefabricated box beam.

[0032] Combined with attachment Figure 3 , Attachment Figure 4 and attached Figure 5 As shown, a plurality of groups of limit sliding frames 14 are installed on the side of the side plate 5 close to the connecting plate 7. A sliding rod 15 slides inside the plurality of groups of limit sliding frames 14. A hydraulic rod 16 is installed at each end of the sliding rod 15. The other end of the hydraulic rod 16 is installed on the connecting plate 7.

[0033] A limiting strip 10 is provided on the side of the base 4 , and a slot 11 is provided on the outer side of the lower portion of the side panel 5 for engaging with the limiting strip 10 .

[0034] Through the above structure, after the top plate 6 is detached, the side plate 5 is detached. The multiple sets of hydraulic rods 16 are actuated simultaneously. The hydraulic rods 16 contract, driving the slide rods 15 to move. The slide rods 15 slide inside the limit slide frame 14, pulling the multiple sets of limit slide frames 14 and the side plate 5 toward the connecting plate 7. The side plate 5 begins to detach from the precast box girder side wall on the side close to the connecting plate 7 until the side plate 5 is completely detached from the precast box girder side wall.

[0035] An arc-shaped ridge 27 is installed on the side of the top plate 6 close to the side plate 5. The arc-shaped ridge 27 is located above the sleeve 13. After the top plate 6 is detached, the arc-shaped ridge 27 rotates downward, so that an arc-shaped groove appears on the concrete, so that the upper side of the side plate 5 has a certain rotation range, ensuring that the side plate 5 can be completely detached from the side wall of the prefabricated box beam, and the upper side of the side plate 5 will not contact the top of the prefabricated box beam when the side plate 5 rotates at a small angle.

[0036] Combined with attachment Figure 2 and attached Figure 3 As shown, multiple groups of hydraulic rods 17 are installed on the lower side of the connecting plate 7, and a stopper 18 is installed at the lower end of the hydraulic rod 17. A through hole is provided at the bottom of the base 4 for the stopper 18 to pass through, and an elastic sealing frame 19 is provided on the outside of the stopper 18.

[0037] Through the above structure, after the top plate 6 and the side plate 5 are separated, the side plate 5 is restored to contact with the side wall of the prefabricated box beam, so that the upper side of the side plate 5 is a distance away from the arc-shaped groove at the top of the prefabricated box beam, and finally the base 4 is separated from the bottom of the prefabricated box beam, and multiple groups of hydraulic rods 17 are actuated at the same time. The block 18 is initially located in the through hole at the bottom of the base 4, so that the base 4 is a complete plane, and the elastic sealing frame 19 is used to prevent concrete from entering the through hole. The hydraulic rod 17 is extended to push the block 18 out of the through hole, supported at the bottom of the prefabricated box beam, and the base 4 is moved upward for a distance and separated from the bottom of the prefabricated box beam. After the base 4, the side plate 5 and the top plate 6 are all separated from the prefabricated box beam, the winch can stably pull the inner mold out of the prefabricated box beam, thereby improving the efficiency of pulling the inner mold out of the prefabricated box beam.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0040] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A prefabricated box beam hydraulic formwork, comprising an outer formwork (1), a base (2) being installed on the lower side of the outer formwork (1), a plurality of support frames (3) being connected between the upper side of the base (2) and the outer formwork (1), an inner formwork being provided on the inner side of the outer formwork (1), and characterized in that: The inner mold includes a base (4), the base (4) is rotatably connected to side plates (5) on opposite sides, a top plate (6) is rotatably mounted on the upper side of the side plates (5), a connecting plate (7) is mounted on the upper side of the middle of the base (4), and a groove (21) is provided on opposite sides of the upper part of the connecting plate (7) for matching the installation of the top plate (6).

2. The prefabricated box beam hydraulic formwork according to claim 1, characterized in that: The bottom of the base (4) is provided with a plurality of groups of connecting ears (8) on opposite sides, the lower side of the side plate (5) is provided with a plurality of groups of connecting ears (9) rotatably sleeved with the connecting ears (8), the upper side of the side plate (5) is provided with a connecting shaft (12), and one side of the top plate (6) is provided with a sleeve (13) rotatably sleeved with the connecting shaft (12).

3. The prefabricated box beam hydraulic formwork according to claim 1, characterized in that: A plurality of groups of position-limiting sliding frames (14) are installed on one side of the side plate (5) close to the connecting plate (7), and a sliding rod (15) slides inside the plurality of groups of position-limiting sliding frames (14). A hydraulic rod (16) is installed at both ends of the sliding rod (15), and the other end of the hydraulic rod (16) is installed on the connecting plate (7).

4. The prefabricated box beam hydraulic formwork according to claim 1, characterized in that: A limiting strip (10) is provided on the side of the base (4), and a slot (11) for fitting the limiting strip (10) is provided on the outer side of the lower portion of the side plate (5).

5. The prefabricated box beam hydraulic formwork according to claim 1, characterized in that: A plurality of groups of hydraulic rods (17) are installed on the lower side of the connecting plate (7), and a stopper (18) is installed at the lower end of the hydraulic rod (17). A through hole for the stopper (18) to pass through is provided at the bottom of the base (4), and an elastic sealing frame (19) is provided on the outer side of the stopper (18).

6. The prefabricated box beam hydraulic formwork according to claim 1, characterized in that: A second cutting groove (25) is provided on the side of the lower side wall of the top plate (6) close to the connecting plate (7), and a plurality of groups of second limiting sliding frames (26) are installed at the bottom of the second cutting groove (25). A second sliding rod (24) passes through the interior of the plurality of groups of second limiting sliding frames (26), and a connecting block (23) is installed at both ends of the second sliding rod (24), and a hydraulic rod (22) is installed on one side of the connecting block (23).

7. The prefabricated box beam hydraulic formwork according to claim 6, characterized in that: The second slide bar (24) and the connecting block (23) are located inside the first cut groove (21), and the bottom of the first cut groove (21) is provided with an installation groove (20) for matching the installation of the third hydraulic rod (22).

8. The prefabricated box beam hydraulic formwork according to claim 2, characterized in that: An arc-shaped convex strip (27) is installed on one side of the top plate (6) close to the side plate (5), and the arc-shaped convex strip (27) is located above the sleeve (13).

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