Detachable tensioning hole reserving device

Abstract

The utility model provides a detachable stretch-draw hole reserving device, which relates to the technical field of stretch-draw holes and comprises a template, the template comprises a left semicircular template and a right semicircular template, the left semicircular template and the right semicircular template are clamped and connected through an oblique seam, a detachable inner support is arranged on the inner side of the template, and the outer side of the template is provided with an outer support. And a sheath is arranged on the outer side of the template. According to the utility model, resources can be saved, repeated turnover can be realized, and cost and manufacturing cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tensioning hole openings, in particular to a detachable tensioning hole opening pre-reservation device. Background Art

[0002] With economic development, available land is reduced, and infrastructure, especially highway projects, mostly use elevated and ground road modes to solve traffic congestion problems. In order to reduce space occupation, viaducts mostly use large cantilever prestressed concrete cap beams and prestressed prefabricated beams. At the same time, the cross-sectional types of large cantilever cap beams are diversified, and the layout of prestressed tendons tends to be complex, especially deep buried anchors. In order to solve the problem of preserving tensioning holes and reduce construction costs, improve the quality of hole reservations and construction efficiency, it is urgent to design a detachable tensioning hole reservation device. Summary of the invention

[0003] In view of the above-mentioned prior art, the utility model proposes a detachable tensioning hole reservation device.

[0004] The utility model provides a detachable tensioning hole reservation device, comprising a template, wherein the template comprises a left semicircular template and a right semicircular template, the left semicircular template and the right semicircular template are connected by an oblique seam clamping connection, a detachable inner support is arranged on the inner side of the template, and a sheath is arranged on the outer side of the template.

[0005] Preferably, both sides of either end of the template are provided with stiffening ribs, and bolt holes are provided on the stiffening ribs, and the bolt holes are used to connect with the anchor plate.

[0006] Preferably, the angle of the bevel joint is 45 degrees.

[0007] Preferably, the inner support is connected to the template via a plurality of fixing bolts.

[0008] Preferably, the sheath is a rubber sheath that does not require roughening.

[0009] Preferably, a plurality of hollow portions are provided on the inner support.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the current deep buried anchor tensioning hole reservation is one-time, the steel consumption is relatively large, and the concrete cannot be directly connected when the anchor is sealed, which affects the durability of the prestressing. The utility model can save resources, can be repeatedly used, reduce costs and save construction costs. The utility model designs a bevel joint butt-jointed semicircular formwork. After removing the inner support and the bottom connecting anchor plate bolts, under appropriate external force, the two semicircular formworks can slide toward each other for demoulding, thereby achieving the purpose of removing the formwork. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1It is a schematic structural diagram of a detachable tensioning hole reservation device in an embodiment of the utility model.

[0012] Figure 2 It is a schematic diagram of the structure of the template in the embodiment of the utility model.

[0013] Figure 3 It is a schematic diagram of the structure of the inner support in the embodiment of the utility model.

[0014] Figure 4 It is a schematic diagram of the structure of the rubber sheath in the embodiment of the utility model.

[0015] In the figure: 1. Left semicircular formwork; 2. Right semicircular formwork; 3. Bevel joint; 4. Stiffening ribs; 5. Internal support; 6. Fixing bolts; 7. Rubber sheath. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0017] Example: Figure 1-4 A detachable tension hole reservation device is shown, comprising a tubular template, which is formed by 3mm thick steel plate, including a left semicircular template 1 and a right semicircular template 2, which are connected by a 45-degree bevel joint 3, and stiffening ribs 4 are provided on both sides of either end of the template, and bolt holes are provided on the stiffening ribs 4, which are used to connect with the anchor plate. A detachable tubular inner support 5 is provided on the inner side of the template, and the inner support 5 is connected to the template by eight fixing bolts 6. The inner support 5 is made of 2mm thick steel plate, and four evenly distributed hollow parts are opened in the middle along its periphery. The outer side of the template is sleeved with a rubber sheath 7 that does not require chiseling, as a grout-stopping belt.

[0018] The installation procedure of the reserved device is as follows: connect the semicircular formwork and the anchor plate with bolts, adjust the oblique joints of the two semicircular formworks to be smooth, put on the rubber sheath 7 to ensure close contact, install the inner support 5, tighten the fixing bolts 6 to tighten the formwork; finally, connect the formwork with the bottom formwork of the cap beam with bolts to prevent leakage.

[0019] The disassembly procedure of the reserved device is: loosen the fixing bolts 6, loosen and remove the inner support 5, loosen the connecting bolts between the template and the anchor plate, remove the rubber sheath 7, loosen the template along the normal direction, pull out the left semicircular template 1 and the right semicircular template 2 respectively, and recycle them.

[0020] In order to make the reserved formwork for the tensioning hole opening detachable and turnaround, this embodiment designs the traditional circular steel formwork that cannot be disassembled as a whole into a half-detachable formwork. The formwork is wrapped with a rubber sheath that does not require roughening, which can play a role in demoulding and roughening the concrete surface.

[0021] The above are only implementation methods of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure made using the contents of the specification and drawings of the present utility model, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present utility model.

Claims

1. A detachable tension hole reservation device, characterized in that: The template comprises a left semicircular template and a right semicircular template, the left semicircular template and the right semicircular template are connected by an oblique seam clamping connection, a detachable inner support is arranged on the inner side of the template, and a sheath is arranged on the outer side of the template.

2. The detachable tension hole reservation device according to claim 1, characterized in that: Both sides of either end of the template are provided with stiffening ribs, and bolt holes are provided on the stiffening ribs, and the bolt holes are used to connect with the anchor plate.

3. The detachable tension hole reservation device according to claim 1 or 2, characterized in that: The angled seam is 45 degrees.

4. The detachable tension hole reservation device according to claim 1 or 2, characterized in that: The inner support is connected to the template via a plurality of fixing bolts.

5. The detachable tension hole reservation device according to claim 1 or 2, characterized in that: The sheath is a rubber sheath that does not require chiseling.

6. The detachable tension hole reservation device according to claim 1 or 2, characterized in that: The inner support is provided with a plurality of hollow parts.

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