Box girder ventilation hole and hoisting hole forming device

Abstract

The utility model discloses a box girder vent hole and hoisting hole forming device, which relates to the technical field of building construction and comprises at least one template component and at least one hole forming component. The template assembly is provided with an outer plate and an inner plate which are opposite to each other, the outer plate is provided with at least one first through hole, and the inner plate is provided with a second through hole opposite to each first through hole; the two axial ends of the supporting cylinder are open, the connecting rod is coaxially arranged in the supporting cylinder, the supporting plate is arranged on the side, away from the outer plate, of the inner plate, the supporting cylinder penetrates through the first through hole, the axial end of the supporting cylinder abuts against the end face, close to the outer plate, of the inner plate, and the end, close to the inner plate, of the connecting rod extends out of the supporting sleeve. And the end face of the supporting plate adjacent to the inner plate is in threaded connection with the second through hole. In the using process, the end portions, close to each other, of the supporting cylinder and the supporting plate clamp the inner plate, the supporting cylinder can be limited, and the situation that the supporting cylinder is affected by vibration in the concrete vibrating process and moves or the body position is changed is avoided.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a device for forming ventilation holes and hoisting holes for box girders. Background Technology

[0002] A box girder is a type of beam used in bridge engineering. It is hollow inside with flanges on both sides of the upper part, resembling a box, hence its name. To prevent cracking or damage to the box girder walls caused by thermal expansion and contraction due to the sealed internal space, ventilation holes connecting the inside and outside of the box girder must be provided during prefabrication. These ventilation holes also serve as hoisting holes for easy movement of the box girder.

[0003] Chinese patent application number CN202221045352.5 discloses "a forming mold for ventilation holes during the demolding construction of precast box girders, including a box girder and a forming tube cast inside the box girder. One end of the forming tube extends into the internal cavity of the box girder, facilitating ventilation and heat dissipation inside the box girder and reducing the danger to operators inside the box girder. This application has the effect of facilitating ventilation and heat dissipation inside the box girder and reducing the danger to operators inside the box girder."

[0004] The solution provided by this patent involves placing a forming tube or other hole-forming mold or tool within the box girder casting frame, pouring concrete into the frame, and removing the forming tube after the concrete has completely solidified, leaving a ventilation hole that connects the internal cavity of the box girder to the outside. This completes the process of forming the ventilation hole in the box girder. However, the concrete needs to be vibrated during box girder casting, and the solution provided by this patent does not limit the position of the forming tube or other hole-forming mold or tool, causing the mold or tool to easily shift or change position during concrete vibration, resulting in the final hole deviating from the original set position. Therefore, this application proposes a hole-forming device for box girder ventilation holes and lifting holes, which can limit the position of the box girder hole-forming mold or tool. Utility Model Content

[0005] The main purpose of this utility model is to provide a device for forming ventilation holes and hoisting holes for box girders, which aims to solve the technical problem of box girder hole forming molds or tools not being limited in related technologies.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A device for forming ventilation holes and hoisting holes for box girders, comprising:

[0008] At least one template component, the template component having an opposing outer plate and an inner plate, the outer plate having at least one first through hole, and the inner plate having a second through hole opposite to each first through hole;

[0009] At least one hole-forming assembly, the hole-forming assembly having a support cylinder with openings at both ends in the axial direction, a connecting rod coaxially mounted inside the support cylinder, and a support plate located on the side of the inner plate away from the outer plate; the support cylinder passes through the first through hole, and one end of its axial direction abuts against the end face of the inner plate adjacent to the outer plate; the end of the connecting rod located near the inner plate of the support cylinder extends out of the support sleeve, and passes through the second through hole and is threadedly connected to the end face of the support plate adjacent to the inner plate; the ends of the support cylinder and the support plate that are close to each other are clamped to the inner plate to limit the position of the support cylinder.

[0010] As a further improvement of this utility model, the inner wall of the support cylinder is provided with at least one limiting ring, and the area of ​​the side wall of the connecting rod opposite each limiting ring is provided with a limiting groove that matches the limiting ring. Each limiting ring is respectively engaged in each limiting groove to prevent the connecting rod from moving along the axial direction of the support cylinder.

[0011] As a further improvement of this utility model, the end face of the support plate adjacent to the inner plate is provided with a threaded hole, and the end of the connecting rod adjacent to the support plate is provided with a threaded section. The threaded section is threadedly connected to the threaded hole so that the connecting rod is threadedly connected to the support plate.

[0012] As a further improvement of this utility model, the end face of the inner plate away from the outer plate is provided with a groove corresponding to each second through hole, which is interference-fitted with the end face of the connecting rod connected to the support plate. The support plate is inserted into the groove to limit the position of the support plate.

[0013] As a further improvement of this utility model, one end of the connecting rod away from the support plate extends out of the support cylinder and is provided with a nut. The nut is used for external tools to sleeve or clamp the connecting rod and drive the connecting rod to rotate around its own axis.

[0014] As a further improvement of this utility model, the first through hole is interference-fitted with the outer wall of the support cylinder, and the second through hole is interference-fitted with the end of the connecting rod adjacent to the support plate.

[0015] As a further improvement of this utility model, the hole-forming assembly is also provided with a pull ring, and the end of the support cylinder away from the support plate is rotatably connected to the pull ring through two connecting ears.

[0016] The technical solution provided by this utility model can include the following beneficial effects:

[0017] In use, the outer plate supports the outer wall of the box girder, the inner plate supports the inner wall of the box girder, and the support cylinder passes through the first through hole, with one axial end abutting against the end face of the inner plate near the outer plate. Concrete is poured into the gap between the outer and inner plates, and after the poured concrete has completely solidified, it is removed to form the support cylinder. The process of forming ventilation holes or lifting holes can be completed during the pouring of the box girder. One end of the connecting rod passes through the second through hole and is threaded to the support plate. The ends of the support cylinder and the support plate that are close to each other clamp the inner plate to limit the support cylinder and prevent the support cylinder from being displaced or changing its position due to vibration during concrete vibration, thus preventing the final ventilation holes or lifting holes of the box girder from deviating from the original set position. Attached Figure Description

[0018] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0019] Figure 1 This is a structural schematic diagram of a device for forming ventilation holes and hoisting holes in box girders;

[0020] Figure 2 yes Figure 1 A three-dimensional structural diagram of the hole-forming component;

[0021] Figure label:

[0022] 1- Template assembly; 11- Outer plate; 11a- First through hole; 12- Inner plate; 12a- Second through hole; 12b- Groove; 2- Hole forming assembly; 21- Support cylinder; 21a- Limiting ring; 22- Connecting rod; 22a- Limiting groove; 22b- Threaded section; 22c- Nut; 23- Support plate; 23a- Threaded hole; 24- Pull ring. Detailed Implementation

[0023] 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 described embodiments are merely some, not all, of the embodiments of this utility model. Where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Figure 1 This invention illustrates an embodiment of a device for forming ventilation holes and hoisting holes in box girders, see [link / reference]. Figure 1In this embodiment, the hole-forming device for the ventilation holes and hoisting holes of the box girder includes: at least one template component 1 and at least one hole-forming component 2.

[0025] Among them, see Figure 1 The template assembly 1 has an outer plate 11 and an inner plate 12 facing each other. The outer plate 11 has at least one first through hole 11a, and the inner plate 12 has a second through hole 12a opposite to each first through hole 11a. The hole forming assembly 2 has a support cylinder 21 with openings at both ends in the axial direction, a connecting rod 22 coaxially installed in the support cylinder 21, and a connecting rod 22 provided in the inner plate 12. A support plate 23 on one side; the support cylinder 21 passes through the first through hole 11a, and one axial end abuts against the end face of the inner plate 12 near the outer plate 11. Concrete is poured into the gap between the outer plate 11 and the inner plate 12. After the poured concrete has completely solidified, it is taken out to form the support cylinder 21. The process of forming ventilation holes or hoisting holes can be completed during the casting of the box girder; the connecting rod 22 extends out of the support sleeve at the end of the support cylinder 21 near the inner plate 12 and passes through the second through hole 12a to connect with the end face of the support plate 23 near the inner plate 12. When the end of the support cylinder 21 near the inner plate 12 covers the second through hole 12a, and the connecting rod 22 cannot move along the axial direction of the support cylinder 21, the ends of the support cylinder 21 and the support plate 23 that are close to each other clamp the inner plate 12, which can limit the support cylinder 21 to avoid displacement or change of position of the support cylinder 21 due to vibration during the concrete vibration process, so as to prevent the final ventilation holes or hoisting holes of the box girder from deviating from the original set position.

[0026] Further, see Figure 2 The inner wall of the support cylinder 21 is provided with at least one limiting ring 21a. The area of ​​the side wall of the connecting rod 22 facing each limiting ring 21a is provided with a limiting groove 22a that matches the limiting ring 21a. Each limiting ring 21a is respectively clamped to the limiting groove 22a, which can prevent the connecting rod 22 from moving along the axial direction of the support cylinder 21. When the connecting rod 22 is connected to the support plate 23, the ends of the support cylinder 21 and the support plate 23 that are close to each other clamp the inner plate 12.

[0027] Further, see Figure 2 The end face of the support plate 23 near the inner plate 12 is provided with a threaded hole 23a, and the end of the connecting rod 22 near the support plate 23 is provided with a threaded section 22b. The threaded section 22b is threadedly connected to the threaded hole 23a, so that one end of the connecting rod 22 can be threadedly connected to the support plate 23 through the second through hole 12a.

[0028] Optionally, the inner diameter of the first through hole 11a matches the outer diameter of the support cylinder 21. When the support cylinder 21 passes through the first through hole 11a and concrete is poured, the concrete is less likely to flow out from the gap between the inner wall of the first through hole 11a and the outer wall of the support cylinder 21.

[0029] Optionally, the inner diameter of the second through hole 12a matches the outer diameter of the threaded section 22b, so that one end of the connecting rod 22 passes through the second through hole 12a while the end of the support cylinder 21 adjacent to the inner plate 12 cannot pass through the second through hole 12a.

[0030] Further, see Figure 1 Each second through hole 12a on the end face of the inner plate 12 away from the outer plate 11 is provided with a groove 12b that is interference-fitted with the end face of the connecting rod 22 of the support plate 23. The groove 12b limits the support plate 23 and prevents the support plate 23 from rotating around the axis of the connecting rod 22. Thus, when the connecting rod 22 is driven to rotate clockwise or counterclockwise around its own axis, the connecting rod 22 can be separated from the support plate 23 or threadedly connected.

[0031] Optionally, the end face of the support plate 23 adjacent to the inner plate 12 and the groove 12b are both circular. The circular shape of the end face of the support plate 23 adjacent to the inner plate 12 is offset from the axis of the connecting rod 22, which can prevent the support plate 23 from rotating around the axis of the connecting rod 22 when the support plate 23 is engaged in the groove 12b.

[0032] Optionally, the end face of the support plate 23 adjacent to the inner plate 12 and the groove 12b are not circular, which can prevent the support plate 23 from rotating around the axis of the connecting rod 22 when the support plate 23 is engaged in the groove 12b.

[0033] Further, see Figure 2 One end of the connecting rod 22 away from the support plate 23 extends out of the support cylinder 21 and is provided with a nut 22c. The nut 22c is used for external tools to sleeve or clamp the connecting rod 22, so as to drive the connecting rod 22 to rotate around its own axis with the help of external force, thereby realizing the process of threaded connection or separation between the connecting rod 22 and the support plate 23.

[0034] Further, see Figure 2 The hole-forming component 2 is also provided with a pull ring 24. The end of the support cylinder 21 away from the support plate 23 is rotatably connected to the pull ring 24 through two connecting ears so that the support cylinder 21 can be removed when the concrete is completely solidified during the box girder pouring.

[0035] Optionally, the pull ring 24 has a C-shaped structure, with its radial ends extending into the circular holes of the two connecting ears, so that the pull ring 24 can rotate around the axis of the circular holes of the connecting ears. When the pull ring 24 is not in use, it can be rotated to one side of the support cylinder 21 to avoid affecting the clamping of external tools or the connection of the nut 22c.

[0036] In this embodiment, the outer plate 11 supports the outer wall of the box girder, the inner plate 12 supports the inner wall of the box girder, the support cylinder 21 passes through the first through hole 11a, and one axial end abuts against the end face of the inner plate 12 near the outer plate 11. Concrete is poured into the gap between the outer plate 11 and the inner plate 12. After the poured concrete has completely solidified, it is taken out to form the support cylinder 21. The process of forming ventilation holes or lifting holes can be completed during the pouring of the box girder. One end of the connecting rod 22 passes through the second through hole 12a and is threaded to the support plate 23. The ends of the support cylinder 21 and the support plate 23 that are close to each other clamp the inner plate 12 to limit the support cylinder 21 and prevent the support cylinder 21 from being displaced or changing its position due to vibration during the concrete vibration process, so as to prevent the final ventilation holes or lifting holes of the box girder from deviating from the original set position.

[0037] 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 should be included within the protection scope of the present utility model.

Claims

1. A box girder vent, lifting hole forming apparatus, characterised in that, The application relates to a template assembly and a hole-forming assembly. The template assembly comprises at least one template component provided with opposite outer and inner plates, the outer plate is provided with at least one first through hole, and the inner plate is provided with a second through hole opposite to each first through hole. The hole-forming assembly comprises a support cylinder with openings at both axial ends, a connecting rod coaxially arranged in the support cylinder, and a support plate arranged on the side of the inner plate away from the outer plate; the support cylinder penetrates through the first through hole and abuts against the end surface of the inner plate close to the outer plate in the axial direction, the connecting rod is arranged at the end of the support cylinder close to the inner plate and extends out of the support cylinder, penetrates through the second through hole and is threadedly connected with the end surface of the support plate close to the inner plate, and the end portions of the support cylinder and the support plate close to each other clamp the inner plate to limit the support cylinder.

2. The box girder vent, lift hole forming apparatus of claim 1, wherein, The inner wall of the support cylinder is provided with at least one limiting ring, the side wall of the connecting rod is provided with a limiting groove matched with each limiting ring in the region opposite to the limiting ring, and each limiting ring is clamped into each limiting groove to prevent the connecting rod from moving in the axial direction of the support cylinder.

3. The box girder vent, lift hole forming apparatus of claim 2, wherein, The end surface of the support plate close to the inner plate is provided with a threaded hole, the end portion of the connecting rod close to the support plate is provided with a threaded section, and the threaded section is threadedly connected with the threaded hole to threadedly connect the connecting rod with the support plate.

4. The box girder vent, lift hole forming apparatus of claim 3, wherein, The end surface of the inner plate away from the outer plate is provided with a groove matched with the end surface of the connecting rod in the region corresponding to each second through hole, and the support plate is clamped into the groove to limit the support plate.

5. The box girder vent, lift hole forming apparatus of claim 4, wherein, The end of the connecting rod away from the support plate extends out of the support cylinder and is provided with a nut, the nut is used for sleeving or clamping the connecting rod by an external tool and driving the connecting rod to rotate around the axis of the connecting rod.

6. The box beam vent, lift hole forming apparatus of claim 5, wherein, The first through hole is matched with the outer wall of the support cylinder in an interference fit, and the second through hole is matched with the end portion of the connecting rod close to the support plate in an interference fit.

7. The box beam vent, lift hole forming apparatus of claim 6 wherein, The hole-forming assembly is further provided with a pull ring, and the end portion of the support cylinder away from the support plate is rotationally connected with the pull ring through two connecting ears.

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