Detachable bridge hollow slab core mold device

Abstract

The utility model discloses a detachable bridge hollow slab core mold device which comprises an outer sleeve, a plurality of first connecting pipes are arranged on the top and the bottom of the outer sleeve in the extending direction of the outer sleeve in a communicating mode, and first moving pieces are movably connected to the ends, away from the outer sleeve, of the first connecting pipes in an inserted mode. A first supporting plate is fixedly connected between the ends, away from the first connecting pipe, of the first moving pieces. The air inlet pipe is inflated and deflated, the first moving part and the second moving part are driven through air pressure, the first supporting plate and the second supporting plate are expanded and contracted, a supporting structure is rapidly constructed during installation, the core mold is conveniently taken out of the hollow plate during disassembly, pushing is conducted through the air pressure, and the core mold is convenient to assemble and disassemble. The first supporting plate and the second supporting plate can provide uniform supporting force in all directions, it is ensured that the internal shape is stable when the bridge hollow slab is poured, and the requirement of construction for the shape precision of the hollow slab is met.

Description

Technical Field

[0001] This utility model relates to the field of hollow slab core mold technology, and in particular to a detachable bridge hollow slab core mold device. Background Technology

[0002] Hollow slabs are made of cast concrete and have a hollow cross-section. They are lighter than solid slabs of the same span, making them easier to transport and install. They are also shorter than T-beams of the same span, so they are more commonly used in short-span bridges.

[0003] In existing technologies, hollow slab core molds mostly adopt a design of template combined with a support structure. During the molding stage of precast hollow slabs, the support structure can indeed provide stable support for the core mold side plates, ensuring the smooth molding of the hollow slab. However, once the precast hollow slab has completed the molding and curing process, the subsequent disassembly of the core mold becomes a thorny problem. Since the core mold is now tightly surrounded by the concrete-cast hollow slab and is also supported by the support structure, the disassembly of the core mold side plates is extremely difficult. In addition, when installing the support structure, each support component of the support structure needs to be installed one by one to correspond to the core mold side plates, which is a complicated and tedious operation. Therefore, a detachable bridge hollow slab core mold device is proposed to solve this problem. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0005] Demountable bridge hollow slab core mold device, including:

[0006] An outer tube is provided with multiple sets of connecting tubes at its top and bottom and extending along the direction of the outer tube. A movable component is movably inserted into the end of each connecting tube away from the outer tube. A support plate is fixedly connected between the ends of the multiple sets of movable components away from the connecting tubes.

[0007] An inner sleeve is coaxially nested inside the outer sleeve. Multiple sets of connecting pipes are provided on both sides of the inner sleeve and extending along the direction of the inner sleeve. One end of each connecting pipe penetrates the outer sleeve and extends to the outside of the outer sleeve. A movable component is movably inserted into the end of the connecting pipe extending to the outside of the outer sleeve. A support plate is fixedly connected between the ends of the multiple sets of movable components away from the connecting pipes.

[0008] The air intake pipe is provided in two sets, which are respectively connected to the outer sleeve and the inner sleeve.

[0009] The curvatures of the first support plate and the second support plate are matched, and the center axis of their curvatures coincides with the axis of the outer sleeve.

[0010] As an improvement to the above technical solution, the moving part one includes a moving rod one that is movably inserted into the end of the connecting pipe one, a piston one that is fixedly disposed at one end of the moving rod one located inside the connecting pipe one, and a spring one that is wound around the surface of the moving rod one and located in a section inside the connecting pipe one.

[0011] As an improvement to the above technical solution, the second movable component includes a second movable rod movably inserted into the end of the second connecting pipe, a second piston fixedly disposed at one end of the second movable rod located inside the second connecting pipe, and a second spring wound around the surface of the second movable rod and located in a section inside the second connecting pipe.

[0012] Multiple sets of fixing plates are provided inside the support plate one and support plate two, and the included angle between two adjacent sets of fixing plates is an acute angle.

[0013] As an improvement to the above technical solution, the first support plate and the second support plate are in the form of an arc shape.

[0014] The beneficial effects of this utility model are:

[0015] By inflating and deflating the air intake pipe, the gas pressure drives the moving parts one and two to expand and contract the support plates one and two. This allows for rapid construction of the support structure during installation and easy removal of the core mold from the hollow slab during disassembly. Driven by gas pressure, the support plates one and two can provide uniform support force in all directions, ensuring the stability of the internal shape of the bridge hollow slab during casting and meeting the construction requirements for the shape accuracy of the hollow slab. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the unfolded structure of support plate one and support plate two of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of support plate one and support plate two in their retracted state according to this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the outer sleeve and the inner sleeve of this utility model;

[0019] Figure 4 This is a structural schematic diagram of the support plate of this utility model.

[0020] Reference numerals: 10, outer sleeve; 11, connecting pipe one; 12, support plate one; 13, moving rod one; 14, piston one; 15, spring one; 20, inner sleeve; 21, connecting pipe two; 22, moving rod two; 23, piston two; 24, spring two; 25, support plate two; 30, fixing plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Demountable bridge hollow slab core mold device, including:

[0023] The outer tube 10 has multiple sets of connecting tubes 11 connected to its top and bottom and extending along the direction of the outer tube 10. A movable component is movably inserted into the end of the connecting tube 11 away from the outer tube 10. A support plate 12 is fixedly connected between the ends of the multiple sets of movable components away from the connecting tube 11.

[0024] The inner sleeve 20 is coaxially nested inside the outer sleeve 10. Multiple sets of connecting pipes 21 are provided on both sides of the inner sleeve 20 and extend in a direction connected to it. One end of the connecting pipe 21 passes through the outer sleeve 10 and extends to the outside of the outer sleeve 10. A movable component 2 is movably inserted into the end of the connecting pipe 21 extending to the outside of the outer sleeve 10. A support plate 25 is fixedly connected between the ends of the multiple sets of movable components 2 away from the connecting pipe 21.

[0025] The air intake pipe is provided in two sets, which are respectively connected to the outer sleeve 10 and the inner sleeve 20;

[0026] The curvatures of the first support plate 12 and the second support plate 25 are adapted to each other, and the center axis of their curvatures coincides with the axis of the outer sleeve 10.

[0027] Specifically, a rubber sleeve is fitted onto the device, and then two sets of air inlet pipes are used to inflate the outer sleeve 10 and the inner sleeve 20 respectively. First, gas is injected into the outer sleeve 10, and then the gas in the outer sleeve 10 enters the connecting pipe 11. The gas pressure in the connecting pipe 11 pushes the moving part 1 to slide outward along the connecting pipe 11. Multiple moving parts 1 slide synchronously, causing the support plate 12 to gradually expand outward. The expansion direction of the support plate 12 is radially outward along the outer sleeve 10. After the support plate 12 expands, another set of air inlet pipes inflates the inner sleeve 20. After the gas in the inner sleeve 20 enters the connecting pipe 21, it pushes... The second movable component slides outward along the second connecting pipe 21. Multiple sets of the second movable components drive the second support plate 25 to gradually expand outward. The expansion direction of the second support plate 25 is also radially outward along the inner sleeve 20. Since the curvatures of the first support plate 12 and the second support plate 25 are compatible, and their curvature center axes coincide with the axis of the outer sleeve 10, the first support plate 12 and the second support plate 25 can work together during the expansion process to jointly construct a support structure that conforms to the internal shape of the hollow bridge slab. When the first support plate 12 and the second support plate 25 have fully expanded to the predetermined position, the entire core mold device provides internal support for the casting of the hollow bridge slab. (Reference) Figure 1 Since support plate 12 and support plate 25 are opened by gas pressure pushing the moving parts, they can provide relatively uniform support force in all directions, ensuring the internal shape of the hollow slab of the bridge is stable during the casting process and meeting construction requirements. After the hollow slab of the beam is cast and reaches a certain strength, the outer sleeve 10 and inner sleeve 20 are released sequentially through the air inlet pipe. As the gas is released, the air pressure in connecting pipe 11 and connecting pipe 21 decreases, and moving parts 1 and 2 slide in opposite directions under their own elastic force, causing support plate 12 and support plate 25 to retract back to their initial positions. (Reference) Figure 2 At this point, the entire core mold device can be removed from the hollow bridge slab, completing the disassembly process for future use. The rubber sleeve can fill the tiny gaps between the area enclosed by support plate 12 and support plate 25, creating a more sealed space and preventing concrete slurry from seeping into the core mold during the pouring of the hollow bridge slab, thus ensuring the normal use of the core mold. At the same time, the surface of the rubber sleeve is relatively smooth and has less adhesion to the concrete, making it easier to remove the core mold from the concrete after the hollow slab is poured, reducing demolding resistance and avoiding damage to the inner wall of the formed hollow slab.

[0028] In one embodiment, the movable component includes a movable rod 13 movably inserted into the end of the connecting tube 11, a piston 14 fixedly disposed at one end of the movable rod 13 located inside the connecting tube 11, and a spring 15 wound around the surface of the movable rod 13 and located in a section inside the connecting tube 11. The gas pressure inside the connecting tube 11 pushes the piston 14, causing the movable rod 13 to slide outward along the connecting tube 11. The spring 15 is compressed during this process, making the movement of the movable rod 13 more stable. Multiple movable rods 13 slide synchronously, causing the support plate 12 to gradually expand radially outward along the outer sleeve 10.

[0029] In one embodiment, the second movable component includes a second movable rod 22 movably inserted into the end of the second connecting pipe 21, a second piston 23 fixedly disposed at one end of the second movable rod 22 located inside the second connecting pipe 21, and a second spring 24 wound around the surface of the second movable rod 22 and located in a section inside the second connecting pipe 21. The gas pressure inside the second connecting pipe 21 pushes the second piston 23, causing the second movable rod 22 to slide outward along the second connecting pipe 21. The second spring 24 is squeezed in this process, making the movement of the second movable rod 22 more stable. Multiple second movable rods 22 slide synchronously, causing the second support plate 25 to gradually expand radially outward along the inner sleeve 20.

[0030] In one embodiment, multiple sets of fixing plates 30 are provided within the support plate 12 and the support plate 25. The included angle between two adjacent sets of fixing plates 30 is an acute angle. The fixing plates 30 can increase the structural strength of the support plate 12 and the support plate 25, making them less prone to deformation when subjected to the pressure during the pouring of the hollow bridge slab. The acute angle can form a triangular structure between adjacent fixing plates 30. Utilizing the stability principle of triangles, the stability of the entire support structure is further improved, ensuring that the core mold device can maintain its shape during use and providing reliable support for the pouring of the hollow bridge slab.

[0031] In one embodiment, the support plate 12 and the support plate 25 are arc-shaped. When the two arc-shaped support plates 12 and 25 are enclosed, they can form an approximately circular sealed space. This facilitates the formation of a good sealing effect after a rubber sleeve is fitted on its surface, preventing concrete slurry from seeping into the core mold and ensuring the internal quality and structural integrity of the hollow slab.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A detachable hollow slab core mold device for bridges, characterized in that, include: The outer tube (10) has multiple sets of connecting tubes (11) at its top and bottom and extending along the outer tube (10) in a direction of communication. A movable component is movably inserted into one end of the connecting tube (11) away from the outer tube (10). A support plate (12) is fixedly connected between the ends of the multiple sets of movable components away from the connecting tubes (11). An inner sleeve (20) is coaxially nested inside the outer sleeve (10). Multiple sets of connecting pipes (21) are provided on both sides of the inner sleeve (20) and extending in the direction of the inner sleeve (20). One end of the connecting pipe (21) passes through the outer sleeve (10) and extends to the outside of the outer sleeve (10). A movable component (21) is movably inserted into the end of the connecting pipe (21) extending to the outside of the outer sleeve (10). A support plate (25) is fixedly connected between the ends of the multiple sets of movable components (21) away from the connecting pipe (21). The intake pipe is provided in two sets, which are respectively connected to the outer sleeve (10) and the inner sleeve (20); Among them, the curvature of the first support plate (12) and the second support plate (25) are adapted to each other, and the curvature center axis of the two coincides with the axis of the outer tube (10).

2. The detachable bridge hollow slab core mold device according to claim 1, characterized in that: The movable component includes a movable rod (13) movably inserted into the end of the connecting tube (11), a piston (14) fixedly disposed at one end of the movable rod (13) located inside the connecting tube (11), and a spring (15) wound around the surface of the movable rod (13) and located in a section inside the connecting tube (11).

3. The detachable bridge hollow slab core mold device according to claim 1, characterized in that: The second movable component includes a second movable rod (22) movably inserted into the end of the second connecting tube (21), a second piston (23) fixedly disposed at one end of the second movable rod (22) located inside the second connecting tube (21), and a second spring (24) wound around the surface of the second movable rod (22) and located in a section inside the second connecting tube (21).

4. The detachable bridge hollow slab core mold device according to claim 1, characterized in that: Multiple sets of fixing plates (30) are provided in the first support plate (12) and the second support plate (25), and the included angle between two adjacent sets of fixing plates (30) is an acute angle.

5. The detachable bridge hollow slab core mold device according to claim 1, characterized in that: The first support plate (12) and the second support plate (25) are arc-shaped.

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