Bending device capable of preventing slurry from entering

Abstract

The utility model belongs to the technical field of bridge construction, and particularly provides an anti-slurry-entering bending device which further comprises a sealing piece, the sealing piece is connected outside a stepped shaft between two side plates, and the problem that in the prior art, after prestress tensioning is completed, the top of a pull rod of the bending device needs to be sealed through foam glue, and the sealing piece is not used for sealing the top of the pull rod of the bending device is solved. The problem that the connecting pull rod cannot be detached due to the fact that cement paste enters the connecting position of the stepped shaft and the pull rod is solved. The sealing piece is adopted outside the stepped shaft to form a closed space, it is ensured that no cement paste enters the stepped shaft in the concrete construction stage, the cement paste is prevented from being bonded with the top of the pull rod, and it is ensured that the pull rod can be detached after the steel strand is released and tensioned.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology, and specifically relates to a bending device to prevent grout from entering. Background Technology

[0002] The bend riser is a key component in prestressed concrete precast beams with zigzag reinforcement. Currently, the bend risers used in engineering are mainly of two types: roller type and tie plate type. After prestressing is completed, the top of the tie rod of the bend riser must be sealed with foam adhesive to prevent cement slurry from entering at the connection between the stepped shaft and the tie rod, which could lead to the inability to remove the connecting bolt.

[0003] Chinese patent document CN111663447 discloses a prestressed bending anchoring device for pre-tensioned precast beams, which enables the bending device to rotate freely and be installed and removed quickly. After the prestressing is completed, the top of the connecting screw of the bending device still needs to be sealed with foam glue to prevent cement slurry from entering the connection between the stepped shaft and the connecting screw, which would make it impossible to remove the connecting screw. Utility Model Content

[0004] The present invention provides a grout-proof bending device, the purpose of which is to overcome the problem in the prior art that after the prestressing tensioning is completed, the top of the bending device's tie rod must be sealed with foam glue to prevent cement grout from entering the connection between the stepped shaft and the tie rod, thus making it impossible to remove the connecting tie rod.

[0005] Therefore, this utility model provides a slurry-preventing bender, comprising two side plates, multiple screws, multiple rollers, multiple nuts, and one stepped shaft. The two side plates are symmetrically distributed with a front-to-back gap. The multiple screws and the stepped shaft are sequentially and spaced between the two side plates from top to bottom. Both ends of each screw and both ends of the stepped shaft protrude from the side plates. Both ends of each screw and both ends of the stepped shaft are connected to the nuts via rollers. Both ends of the stepped shaft are connected to the nuts via rollers. Steel strands are connected between two adjacent rollers. The bender also includes a sealing element, with the stepped shaft between the two side plates externally connected to the sealing element.

[0006] Preferably, the sealing element is a cube or cuboid without a front or back face, and a pull rod hole is provided on the bottom surface of the sealing element.

[0007] Preferably, the bending device further includes a base plate, the bottom ends of the two side plates are connected through the base plate, and a sealing element is connected on the top of the base plate.

[0008] Preferably, the area of ​​the base plate is larger than the area below the seal.

[0009] Preferably, the seal is a cube or cuboid without a front, back, and bottom surface, and the bottom plate has a pull rod hole located inside the seal.

[0010] Preferably, the base plate and the side plate are welded together.

[0011] Preferably, the base plate does not extend beyond the outer side of the side plate.

[0012] Preferably, the base plate and the seal are welded together.

[0013] Preferably, the thickness of the base plate is greater than the thickness of the side plate.

[0014] Preferably, the material of the sealing element is steel plate.

[0015] The beneficial effects of this utility model are:

[0016] The grout-proof bending device provided by this utility model uses a sealing element to form a closed space on the outside of the stepped shaft, ensuring that no cement grout enters the stepped shaft during the concrete construction stage, preventing cement grout from sticking to the top of the tie rod, and ensuring that the tie rod can be disassembled after the steel strand is released. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is the main structural view of the anti-grout bending device (without a bottom plate);

[0019] Figure 2 This is a right view of the structure of the anti-grout bending device (without a bottom plate);

[0020] Figure 3 This is the main structural view of the anti-grout bending device (with a base plate);

[0021] Figure 4 This is a right view of the structure of the anti-grout bending device (with a base plate);

[0022] Figure 5 This is a partial structural diagram of a bender (with a base plate) used to prevent slurry from entering.

[0023] Explanation of reference numerals in the attached drawings: 1. Side plate; 2. Screw; 3. Roller; 4. Nut; 5. Stepped shaft; 6. Seal; 7. Base plate; 8. Tie rod; 9. Steel strand. Detailed Implementation

[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. Unless otherwise specified in the embodiments, conventional conditions or conditions recommended by the manufacturer should be followed.

[0025] Example 1:

[0026] like Figures 1-4 As shown, a slurry-preventing bender includes two side plates 1, multiple screws 2, multiple rollers 3, multiple nuts 4, and a stepped shaft 5. The two side plates 1 are symmetrically distributed with a gap between them. The multiple screws 2 and the stepped shaft 5 are sequentially and spaced apart between the two side plates 1 from top to bottom. Both ends of each screw 2 and both ends of each stepped shaft 5 protrude from the side plate 1. Both ends of each screw 2 and both ends of each stepped shaft 5 are connected to the nuts 4 through the rollers 3. Both ends of each stepped shaft 5 are connected to the nuts 4 through the rollers 3. Steel strands 9 are connected between two adjacent rollers 3. The bender also includes a sealing element 6, and the stepped shaft 5 between the two side plates 1 is externally connected to the sealing element 6.

[0027] Specifically, the step shaft 5 is connected to the tie rod 8. The connection between the step shaft 5 and the tie rod 8 is also located inside the seal 6. The outside of the step shaft 5 is sealed by the seal 6 to ensure that no cement slurry enters the step shaft 5 during the concrete construction stage, thus preventing the cement slurry from sticking to the top of the tie rod and ensuring that the tie rod can be removed after the steel strand 9 is released.

[0028] Example 2:

[0029] like Figure 1 and Figure 2 As shown, the sealing element 6 is a cube or cuboid without a front or back face, and a pull rod hole is provided on the bottom surface of the sealing element 6.

[0030] Specifically, this shape ensures sealing while saving materials and improving construction efficiency. The retained top, bottom, left, and right sides, when connected, can enhance the rigidity of the seal 6 and the two side plates 1. The tie rod hole facilitates the connection of the tie rod 8.

[0031] Example 3:

[0032] like Figures 3 to 5 As shown, the bending device also includes a base plate 7, the bottom ends of the two side plates 1 are connected through the base plate 7, and a sealing element 6 is connected on the base plate 7.

[0033] Specifically, the base plate 7 is laterally connected to two side plates 1, which significantly improves the bending and torsional stiffness and prevents the side plates 1 from undergoing lateral deformation when the steel strands 5 are tensioned. The base plate 7 serves as the fixed base for the sealing element 6, ensuring the installation flatness of the sealing element 6, achieving precise sealing fit with the stepped shaft 5, simplifying the positioning process of the sealing steel plate, and reducing installation errors.

[0034] Preferably, the area of ​​the base plate 7 is larger than the area below the seal 6.

[0035] Specifically, this structure ensures sealing performance.

[0036] Preferably, the sealing element 6 is a cube or cuboid without a front, back, and bottom surface, and the bottom plate 7 has a pull rod hole located inside the sealing element 6.

[0037] Specifically, the base plate 7, together with the sealing element 6, forms a leak-proof cavity, completely preventing cement slurry from entering the interior of the stepped shaft 5, avoiding the roller 3 from getting stuck or the tie rod 8 from being unable to be disassembled due to concrete seepage, thus saving materials; the tie rod hole facilitates the connection of the tie rod 8.

[0038] Preferably, the base plate 7 and the side plate 1 are welded together.

[0039] Specifically, the welded connection forms a rigid connection, improving bending and shear resistance and preventing deformation during concrete pouring; it ensures uniform stress distribution when the steel strands are tensioned, avoiding localized stress concentration; the welded structure is more compact and requires no additional connectors.

[0040] Preferably, the base plate 7 does not extend beyond the outer side of the side plate 1.

[0041] Specifically, this structure ensures airtightness while saving materials and has a compact design.

[0042] Preferably, the base plate 7 and the sealing element 6 are welded together.

[0043] Specifically, the welded connection ensures reliable sealing, resulting in a more compact structure that eliminates the need for additional connectors.

[0044] Preferably, the thickness of the base plate 7 is greater than the thickness of the side plate 1.

[0045] Specifically, the structure avoids the side plate 1 from bearing excessive out-of-plane bending moment, and the bottom plate 7 is a fixed base. The thickness of the bottom plate 7 is greater than the thickness of the side plate 1, which reduces welding deformation.

[0046] Preferably, the thickness of the base plate 7 is 1.2-1.5 times the thickness of the side plate 1.

[0047] Specifically, this thickness maximizes performance while using less material.

[0048] Preferably, the material of the sealing element 6 is steel plate.

[0049] Specifically, using steel plates can achieve better pressure resistance during sealing.

[0050] In the description of this utility model, it should be understood that if terms such as "front", "inside", "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting this utility model.

[0051] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A kind of anti-advance bending device, including 2 side plates (1), multiple screw rods (2), multiple rollers (3), multiple nuts (4) and a ladder shaft (5), 2 side plates (1) are symmetrically distributed in front and back interval, multiple screw rods (2) and ladder shaft (5) are sequentially connected in 2 side plates (1) between interval from top to bottom, both ends of each screw rod (2) and both ends of ladder shaft (5) are out of side plate (1), both ends of each screw rod (2) and both ends of ladder shaft (5) are connected nut (4) by roller (3), both ends of ladder shaft (5) are connected nut (4) by roller (3), steel strand (9) is connected between upper and lower adjacent two rollers (3);Its characterized in that: The bending device further comprises a sealing member (6) connected outside the stepped shaft (5) between the two side plates (1).

2. The slurry intrusion preventing turn-up as claimed in claim 1, wherein: The sealing member (6) is in the shape of a square or cuboid without front and back faces, and a pull rod hole is formed in the bottom face of the sealing member (6).

3. The slurry intrusion preventing turn-up as claimed in claim 1, wherein: The bending device further comprises a bottom plate (7) connecting the bottom ends of the two side plates (1), and the sealing member (6) is connected to the top face of the bottom plate (7).

4. The slurry intrusion preventing bender of claim 3, wherein: The area of the bottom plate (7) is larger than the bottom face of the sealing member (6).

5. The slurry intrusion preventing turn-up as claimed in claim 4, wherein: The sealing member (6) is in the shape of a square or cuboid without front, back and bottom faces, and a pull rod hole is formed in the bottom plate (7) and located in the sealing member (6).

6. The slurry intrusion preventing bender of claim 3, wherein: The bottom plate (7) and the side plate (1) are connected by welding.

7. The slurry intrusion preventing turn-up as claimed in claim 6, wherein: The bottom plate (7) does not exceed the outer side of the side plate (1).

8. The slurry intrusion preventing bender of claim 3, wherein: The bottom plate (7) and the sealing member (6) are connected by welding.

9. The slurry intrusion preventing bender of claim 7, wherein: The thickness of the bottom plate (7) is larger than the thickness of the side plate (1).

10. The slurry intrusion preventing bender of claim 1, wherein: The material of the sealing member (6) is steel plate.

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