CN-121992941-A - Opposite-pull bolt

CN121992941ACN 121992941 ACN121992941 ACN 121992941ACN-121992941-A

Abstract

The invention discloses a split bolt which is used for tensioning two sides of a concrete wall forming template and comprises a screw rod penetrating through the templates at two sides and a conical cavity sleeved outside the screw rod, wherein a supporting piece for supporting the inner wall of the conical cavity is arranged on the screw rod, and the supporting piece enables the screw rod to be coaxially supported on the conical cavity. The PVC sleeve is replaced by a similar conical cylinder die originally, and the die is made of high-density polyethylene material, so that the smoothness is improved, and the die is convenient to demould. The lining is made of stainless steel, so that the strength is improved. The mold plate can meet the supporting force of the mold plate, is convenient to demold, can be recycled, saves materials to a greater extent, and achieves cost reduction and efficiency improvement.

Inventors

QIN SHAOQING
YU ZHENDONG
WANG ERYONG
YU ZHENHUA

Assignees

中国化学工程第四建设有限公司

Dates

Publication Date: 20260508
Application Date: 20260303

Claims (10)

1. The utility model provides a split bolt for the tensioning of concrete wall shaping template both sides, including the screw rod that passes both sides template, its characterized in that still includes the cover the outer toper chamber of screw rod, be provided with on the screw rod and support the support piece of toper intracavity wall, support piece makes the coaxial support of screw rod is in on the toper chamber.
2. The split bolt according to claim 1, wherein the tapered cavity is located on a tapered sleeve, the tapered sleeve comprises an inner cylinder and an outer cylinder nested with each other, the inner cylinder is made of metal, and the outer cylinder is made of polyethylene.
3. The split bolt according to claim 1, wherein the supporting member comprises a sliding sleeve which is sleeved on the screw in a sliding manner, a plurality of supporting rods which are supported between the sliding sleeve and the inner wall of the conical cavity are uniformly distributed on the circumference of the sliding sleeve, a spring which supports the sliding sleeve is sleeved on the screw, and a clamping part which pushes the spring towards the top end opening direction of the conical cavity is arranged on the screw.
4. The split bolt according to claim 3, wherein the supporting member comprises two sliding sleeves axially arranged along the screw rod, a plurality of supporting rods are uniformly distributed on the circumference of the sliding sleeves, the supporting rods are rotatably connected with the sliding sleeves through first shaft hinges, the end parts of the supporting rods on the two sliding sleeves are rotatably connected through second shaft hinges, and springs are supported between the sliding sleeves adjacent to the top port of the conical cavity and the top port of the conical cavity.
5. The split bolt of claim 4, wherein the second shaft hinge is provided with a guide wheel supporting the tapered cavity inner wall.
6. The split bolt of claim 4 wherein said tapered cavity top end opening is provided with a stop that supports said spring end.
7. The split bolt according to claim 4, wherein the plurality of support members are disposed along the axial direction of the screw, and springs are supported between the sliding sleeves of adjacent support members.
8. The split bolt according to claim 4, wherein the number of the conical cavities is two, the top ends of the two conical cavities are sleeved on the screw rod in an opposite mode, and the clamping part is a positioning nut in threaded fit with the screw rod.
9. The split bolt according to claim 8, wherein said support members are disposed in both of said tapered cavities, and said threaded rod is provided with a spring supported between said support members in both of said tapered cavities.
10. The split bolt of claim 8, wherein the bottom end opening of the tapered cavity is provided with a radially inward facing rib.

Description

Opposite-pull bolt Technical Field The invention relates to the technical field of concrete forming template fixing, in particular to a split bolt. Background In the construction process of building engineering, the traditional formwork reinforcing method for vertical structures such as walls, columns and the like is to apply wall-penetrating opposite-pull screws to the inside of the wall body to form a drawknot between the outer side formworks, bear lateral pressure and other loads of concrete, ensure that the spacing between the inner side formworks and the outer side formworks can meet design requirements, and simultaneously be fulcrums of the formworks and supporting structures thereof. However, the traditional counter-pulling screw turnover type is characterized in that a larger PVC plastic pipe is sleeved outside the counter-pulling screw and used in a wall body, and the counter-pulling screw turnover type is difficult to pull out and can not be reused after being integrated with concrete after being used, so that material waste can be caused. In order to prevent structural deformation in the casting and tamping process, steel supporting rods and measure reinforcing steel bars are additionally arranged before casting. And because the pipe diameter is smaller, the plugging is difficult during secondary grouting inwards. Disclosure of Invention In order to solve at least one technical problem, the invention provides a split bolt, a conical tube positioned in a wall body is sleeved outside a screw, the conical tube is favorable for taking out and recycling, a conical hole left after the conical tube is taken out is favorable for grouting and plugging, and the screw and the conical tube are supported by a supporting piece, so that the conical tube is prevented from deforming. The technical scheme includes that the split bolt is designed and used for tensioning two sides of a concrete wall forming template, the split bolt comprises a screw rod penetrating through the templates at two sides and a conical cavity sleeved outside the screw rod, a supporting piece for supporting the inner wall of the conical cavity is arranged on the screw rod, and the screw rod is coaxially supported on the conical cavity by the supporting piece. In some embodiments, the conical cavity is located on a conical sleeve, the conical sleeve comprises an inner cylinder body and an outer cylinder body which are nested with each other, the inner cylinder body is made of metal, and the outer cylinder body is made of polyethylene. In some embodiments, the support member comprises a sliding sleeve sleeved on the screw in a sliding manner, a plurality of support rods supporting between the sliding sleeve and the inner wall of the conical cavity are uniformly distributed on the circumference of the sliding sleeve, a spring supporting the sliding sleeve is sleeved on the screw, and a clamping part pushing the spring towards the top end opening direction of the conical cavity is arranged on the screw. In some embodiments, the support member comprises two sliding sleeves axially arranged along the screw, a plurality of support rods are uniformly distributed on the circumference of each sliding sleeve, the support rods are rotatably connected with the sliding sleeves through first shaft hinges, the end parts of the support rods on the two sliding sleeves are rotatably connected through second shaft hinges, and springs are supported between the sliding sleeves adjacent to the top ports of the conical cavities and the top ports of the conical cavities. In some embodiments, the second shaft hinge is provided with a guide wheel supporting the inner wall of the conical cavity. In some embodiments, the conical cavity top end is provided with a stop that supports the spring end. In some embodiments, the support members are a plurality of support members arranged along the axial direction of the screw rod, and springs are supported between the sliding sleeves of adjacent support members. In some embodiments, the two conical cavities are sleeved on the screw rod in an opposite mode, and the clamping part is a positioning nut in threaded fit with the screw rod. In some embodiments, the support members are disposed in both of the conical cavities, and the screw is provided with a spring supported between the support members in both of the conical cavities. In certain embodiments, the bottom end opening of the conical cavity is provided with a radially inward ledge. Compared with the prior art, the invention has the following beneficial effects: According to the invention, the tapered cavity structure is arranged outside the opposite-pull screw rod, and the opposite-pull screw rod is matched with the multipoint support piece, so that the stable tensioning of the template and the reliable positioning of the sleeve are realized. The conical sleeve adopts an inner metal outer high-density polyethylene composite structure, so that the overall strength and the