Precise positioning device for anchor bolt hole of prefabricated culvert cover plate

Abstract

The utility model discloses a prefabricated culvert cover plate anchor bolt hole accurate positioning device which comprises a bottom formwork and a side formwork arranged on the upper portion of the bottom formwork, anchor bolt hole vertical pipes are arranged in the centers of the two sides in the side formwork, and fixing screws in threaded connection with the bottom formwork are arranged in the anchor bolt hole vertical pipes. The anchor bolt hole vertical pipes are arranged on the two sides of the center of the interior of the side formwork for pouring the culvert cover plate, and the fixing screws are adopted for coaxial fixing, so that it is guaranteed that the anchor bolt hole vertical pipes cannot deflect, and the positions of the anchor bolt hole vertical pipes are more accurate; the position of the anchor bolt hole left in the concrete subsequently is more accurate, no error exists when the anchor bolt hole and the wall body preformed hole are installed correspondingly, and through accurate positioning and stable anchor bolt hole installation, the potential safety hazard of construction during maintenance due to inaccurate positioning is reduced.

Description

Technical Field

[0001] This utility model relates to the field of anchor bolt hole positioning for culvert covers, specifically to a device for precise positioning of anchor bolt holes in precast culvert covers. Background Technology

[0002] Culvert covers are structures used on the top of culverts (bridge substructures), primarily functioning to bear the loads of vehicles and pedestrians and provide water passage. Because culverts require frequent traffic, the design and construction of the covers are demanding. During installation, the anchor bolt holes on both sides of the cover must correspond to the pre-drilled holes in the wall. However, errors in the position of the anchor bolt holes occur during the casting of precast culvert covers. This error is mainly due to the skewness of the anchor bolt holes formed by the PVC pipe lining filling material during casting. Once skewed, the anchor bolt hole positions deviate, causing errors between the pre-drilled holes in the wall and the pre-drilled holes in the cover. This not only increases maintenance costs later but also affects the durability of the structure. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a device for precisely positioning anchor bolt holes in precast culvert cover plates.

[0004] This utility model is achieved through the following technical solution:

[0005] A device for precisely positioning anchor bolt holes in a precast culvert cover includes a bottom template and a side template installed on top. An anchor bolt hole vertical tubes are installed in the center of both sides inside the side templates. A fixing screw is installed inside the anchor bolt hole vertical tube and is threadedly connected to the bottom template. The upper part of the fixing screw is positioned and fixed by a pressure plate.

[0006] Alternatively, the pressure plate is positioned at the top of the anchor bolt hole riser and passes through the fixing screw, with a locking nut screwed onto the upper part of the pressure plate.

[0007] Alternatively, the bottom end of the fixing screw is threaded into a fixing nut that is fixed in an embedded hole inside the bottom template.

[0008] Alternatively, multiple limiting baffles are fixed to the lower outer side of the fixing screw to fit against the bottom template support and ensure that the fixing screw is perpendicular.

[0009] Alternatively, multiple limiting baffles may be set at an outer angle and their exterior may fit against the interior of the anchor bolt hole vertical pipe.

[0010] Alternatively, the top of the retaining screw can be fixed to the rotating handle.

[0011] Alternatively, four limiting brackets for restricting the side templates can be fixed to the upper part of the bottom template.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: By setting anchor bolt hole vertical pipes on both sides of the center inside the side formwork of the culvert cover slab and using fixing screws for coaxial fixation, this utility model ensures that the anchor bolt hole vertical pipes will not be deviated and the position is more accurate. The position of the anchor bolt holes left in the concrete is more accurate, and there will be no error when installing them corresponding to the reserved holes in the wall. Through precise positioning and stable anchor bolt hole installation, the safety hazards of construction during maintenance due to inaccurate positioning are reduced. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram showing the connection between the fixing screw and the bottom template in this practical application.

[0015] In the diagram: 1. Bottom template; 2. Limiting angle bracket; 3. Side template; 4. Reinforcing steel frame; 5. Anchor bolt hole vertical pipe; 6. Fixing screw; 7. Pressure plate; 8. Locking nut; 9. Embedded hole; 10. Fixing nut; 11. Limiting baffle. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0017] like Figure 1 As shown, a device for precise positioning of anchor bolt holes in a precast culvert cover includes a bottom template 1 and a side template 3 set above it. The bottom template 1 is made of steel plate with a thickness of 20mm. Anchor bolt hole vertical pipes 5 are set in the center of both sides inside the side template 3. The anchor bolt hole vertical pipes 5 are made of metal pipes. A fixing screw 6 is set inside the anchor bolt hole vertical pipe 5 and is threadedly connected to the bottom template 1. The upper part of the fixing screw 6 is positioned and fixed by a pressure plate 7.

[0018] like Figure 1 As shown, the pressure plate 7 is located at the top of the anchor bolt hole vertical pipe 5 and passes through the fixing screw 6. The upper part of the pressure plate 7 is provided with a locking nut 8 that is screwed to the fixing screw 6.

[0019] like Figure 2 As shown, the bottom end of the fixing screw 6 is threadedly fixed to the fixing nut 10 fixed in the embedding hole 9 inside the bottom template 1. The fixing nut 10 is welded in the embedding hole 9 and is flush with the top of the bottom template 1.

[0020] like Figure 2 As shown, multiple limiting baffles 11 are fixed to the lower outer side of the fixing screw 6, which are supported and attached to the bottom template 1 and ensure that the fixing screw 6 is perpendicular. The bottom of the limiting baffles 11 is higher than the fixing screw 6 by the body of a fixing nut 10. In this way, when the fixing screw 6 is connected to the fixing nut 10, the limiting baffles 11 are attached to the top of the bottom template 1.

[0021] like Figure 2 As shown, the multiple limiting baffles 11 are set at an outer angle and their outer surfaces are in contact with the inside of the anchor bolt hole vertical tube 5, which can ensure that the anchor bolt hole vertical tube 5 and the fixing screw 6 are coaxially set.

[0022] The top of the fixing screw 6 is fixed to the rotating handle, and the fixing screw 6 can be easily operated by rotating the handle.

[0023] Four limiting angle brackets 2 are fixed on the upper part of the bottom template 1 to restrict the side templates 3. The side templates 3 are fixed on the upper part of the bottom template 1 by the limiting angle brackets 2, ensuring that the fixing nut 10 is at the center of the side template 3.

[0024] The implementation principle of the precise positioning device for anchor bolt holes in precast culvert cover plates in this application is as follows:

[0025] First, place the side template 3 as a whole inside the limiting angle bracket 2 of the bottom template 1 for limiting and fixing. After placing it, put in the steel reinforcement cage 4. Then, insert the anchor bolt hole vertical pipe 5 from the bottom to the outside of the fixing screw 6. Then, rotate the upper part of the operating handle to screw the bottom of the fixing screw 6 into the fixing nuts 10 embedded on both sides of the center of the bottom template 1 that are matched with the side template 3, until the multiple limiting baffles 11 at the bottom of the fixing nuts 10 are in close contact with the bottom template 1, so as to realize the vertical connection between the fixing screw 6 and the bottom template 1.

[0026] After connection, the anchor bolt hole vertical pipe 5 is moved down to fit against the bottom template 1. During the downward movement, the lower inner side of the anchor bolt hole vertical pipe 5 is supported and positioned by multiple limiting baffles 11, achieving coaxial positioning of the anchor bolt hole vertical pipe 5 and the fixing screw 6. After positioning, the locking nut 8 on the upper part of the fixing screw 6 is rotated to press the lower pressure plate 7 onto the top of the anchor bolt hole vertical pipe 5, achieving tension and fixation. Then, concrete is poured into the side template 3. Two hours after pouring the concrete (when the concrete is in the initial setting state), the fixing screw 6 is rotated in the opposite direction to detach from the bottom template 1. Then, the loosened anchor bolt hole vertical pipe 5 is slowly pulled upward (a release agent can be applied to the outside of the anchor bolt hole vertical pipe 5). This makes the position of the anchor bolt hole left in the concrete more accurate, and there will be no error when installing it corresponding to the reserved hole in the wall. Through precise positioning and stable anchor bolt hole installation, the safety hazards of construction during maintenance due to inaccurate positioning are reduced.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A precision positioning device for precast culvert cover plate anchor bolt holes, comprising a bottom formwork (1) and a side formwork (3) arranged on the upper portion of the bottom formwork (1), characterized in that: The anchor hole vertical pipe (5) is internally provided with a fixed screw rod (6) which is threadedly connected with the bottom template (1), and the upper portion of the fixed screw rod (6) is positioned and fixed by the pressing plate (7).

2. The precast culvert cover plate anchor bolt hole precision positioning device according to claim 1, characterized in that: The pressing plate (7) is located at the top of the anchor hole vertical pipe (5) and passes through the fixed screw rod (6), and the upper portion of the pressing plate (7) is provided with a locking nut (8) which is threadedly connected with the fixed screw rod (6).

3. The precast culvert cover plate anchor bolt hole precision positioning device according to claim 2, characterized in that: The bottom end of the fixed screw rod (6) is threadedly fixed with a fixed nut (10) which is fixed in the embedded hole (9) which is opened in the inside of the bottom template (1).

4. The precast culvert cover plate anchor bolt hole precision positioning device according to claim 3, characterized in that: The lower portion of the fixed screw rod (6) is externally fixed with a plurality of limiting flanges (11) which are supported and adhered to the bottom template (1) and ensure that the fixed screw rod (6) is vertical.

5. The precast culvert cover plate anchor bolt hole precision positioning device according to claim 4, characterized in that: The external side of the plurality of limiting flanges (11) is provided with an inclination angle, and the outside thereof is adhered to the inside of the anchor hole vertical pipe (5).

6. The precast culvert cover plate anchor bolt hole precision positioning device according to claim 4, characterized in that: The top of the fixed screw rod (6) is fixed to a rotating handle.

7. The precast culvert cover plate anchor bolt hole precision positioning device according to claim 1, characterized in that: The upper portion of the bottom template (1) is fixed with four limiting angle frames (2) which limit the side template (3).

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