Bidirectional prestress tensioning device suitable for complex surface

Abstract

The invention belongs to the field of building structure reinforcement, and particularly relates to a bidirectional prestress tensioning device suitable for a complex surface. Comprising a center connecting mechanism, four tensioning screws and four tensioning fixing mechanisms, the four faces of the center connecting mechanism are connected with the tensioning screws correspondingly, and the end, away from the center connecting mechanism, of each tensioning screw is connected with the corresponding tensioning fixing mechanism in a clamped mode through an adjusting nut; the tensioning and fixing mechanism is fixedly connected with the surface of a to-be-reinforced structure, the distance between the tensioning and fixing mechanism and the center connecting mechanism is shortened by tightening the adjusting nut, and the tensioning and fixing mechanism is used for tensioning and reinforcing the to-be-reinforced structure. Through cooperation of the tensioning fixing mechanism, the center connecting plate, the tensioning screw rod, the arc-shaped anchorage device and the rotating box, the self-leveling function of the tensioning screw rod on a complex surface is achieved, and the problem that the complex surface is not uniform in prestress reinforcement is solved by applying prestress in multiple directions at the same time.

Description

Technical Field

[0001] The invention belongs to the field of building structure reinforcement, and in particular relates to a bidirectional prestressed tensioning device suitable for complex surfaces. Background Art

[0002] In the existing external prestressed reinforcement technology, the relevant devices are mainly used for the reinforcement of planar structures, such as beams, ground, bridge decks, etc. The tensioning space of such structures is usually sufficient, and the reinforcement operation can be successfully completed in a large range. However, when applied to complex curved structures such as shield tunnels, it is difficult for existing tensioning devices to effectively apply prestress due to complex construction conditions and limited space. In this case, the tensioning capacity of the existing device is significantly limited, and it is difficult to achieve the expected reinforcement effect. In addition, the existing external prestressed reinforcement device is mainly used for unidirectional reinforcement, which is more suitable for structures where stress is concentrated in a certain direction. However, for in-plane reinforcement structures that need to apply stress in multiple directions, the existing technology is difficult to achieve comprehensive and effective reinforcement, resulting in the inability to provide sufficient structural reinforcement effects in some application scenarios. These problems limit the application scope of existing external prestressed reinforcement technology in the reinforcement of complex structures. Therefore, it is urgent to design a bidirectional prestressed tensioning device suitable for complex surfaces. Summary of the invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a bidirectional prestressing tensioning device suitable for complex surfaces, and specifically discloses the following technical solutions:

[0004] A bidirectional prestressed tensioning device suitable for complex surfaces comprises a central connecting mechanism, four tensioning screws and four tensioning fixing mechanisms, wherein the four sides of the central connecting mechanism are respectively connected with tensioning screws, and one end of each tensioning screw away from the central connecting mechanism is clamped with the tensioning fixing mechanism through an adjusting nut, and the tensioning fixing mechanism is fixedly connected to the surface of the structure to be reinforced. The distance between the tensioning fixing mechanism and the central connecting mechanism is shortened by tightening the adjusting nut, so as to perform tensioning reinforcement on the structure to be reinforced.

[0005] Furthermore, the central connection mechanism includes a cross-shaped central connection plate, and the four ends of the central connection plate are rotatably connected to a rotating box respectively, and one end of the tensioning screw away from the tensioning fixing mechanism is connected to the rotating box.

[0006] Furthermore, an installation groove is opened on the upper part of the rotating box, and the end of the tensioning screw away from the tensioning fixing mechanism passes through the installation groove and is fixedly connected to a limiting nut. The top of the installation groove is fixedly connected to a closing plate by a fixing bolt, and the closing plate is used to fix the tensioning screw in the installation groove.

[0007] Furthermore, fixed shafts are fixedly connected to both sides of the rotating box, and each of the rotating boxes is rotatably connected to one end of the central connecting plate through the fixed shafts on both sides thereof.

[0008] Furthermore, the tensioning and fixing mechanism includes a fixing plate, which is provided with a through hole, and one end of the tensioning screw away from the central connecting mechanism passes through the through hole and is threadedly connected with an adjusting nut, and the bottom end of the fixing plate is fixedly connected with an anchor rod, and the anchor rod is fixed in the rebar embedding hole on the surface of the structure to be reinforced.

[0009] Furthermore, an arc-shaped anchor is sleeved on the tensioning screw at a position between the fixing plate and the adjusting nut, the side of the arc-shaped anchor close to the fixing plate is a spherical surface, and the fixing plate is provided with a groove matching the spherical surface of the arc-shaped anchor.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] Through the coordination of the tensioning fixing mechanism, the center connecting plate, the tensioning screw, the arc anchor and the rotating box, the self-leveling function of the tensioning screw on the complex surface is realized, and the problem of uneven prestressing reinforcement on the complex surface is solved by applying prestress in multiple directions at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 It is a structural schematic diagram of the central connecting plate in the present invention.

[0014] Figure 3 It is a front view of the center connecting plate in the present invention.

[0015] Figure 4 It is a left view of the center connecting plate in the present invention.

[0016] Figure 5 It is a schematic diagram of the structure of the arc anchor in the present invention.

[0017] Figure 6 It is a schematic diagram of the structure of the fixing plate and the anchor rod in the present invention.

[0018] Figure 7 It is a structural schematic diagram of the rotating box in the present invention.

[0019] Figure 8 It is a top view of the rotating box in the present invention.

[0020] Fig. 9 It is a left view of the rotating box in the present invention.

[0021] Fig.10It is a front view of the rotating box in the present invention.

[0022] Fig.11 It is the installation schematic diagram of the present invention.

[0023] Among them: 1-fixed plate; 2-tensioning screw; 3-arc anchor; 4-limiting nut; 5-rotation box; 6-center connecting plate; 7-fixed shaft; 8-adjusting nut; 9-anchor rod; 10-closing plate; 11-structure to be reinforced. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Reference Figure 1-11 A bidirectional prestressed tensioning device suitable for complex surfaces includes a central connecting mechanism, four tensioning screws 2 and four tensioning fixing mechanisms. The four sides of the central connecting mechanism are respectively connected with tensioning screws 2. One end of each tensioning screw 2 away from the central connecting mechanism is clamped with the tensioning fixing mechanism through an adjusting nut 8. The tensioning fixing mechanism is fixedly connected to the surface of the structure to be reinforced 11. The distance between the tensioning fixing mechanism and the central connecting mechanism is shortened by tightening the adjusting nut 8, so as to perform tensioning reinforcement on the structure to be reinforced 11.

[0026] In this embodiment, the central connection mechanism includes a cross-shaped central connection plate 6, and the four ends of the central connection plate 6 are rotatably connected to a rotating box 5, and the end of the tensioning screw 2 away from the tensioning fixing mechanism is connected to the rotating box 5. The tensioning screw 2 is rotatably connected to the central connection plate 6 through the rotating box 5, so that the tensioning screw 2 can be automatically leveled.

[0027] In this embodiment, a mounting groove is opened on the upper part of the rotating box 5, and the end of the tensioning screw 2 away from the tensioning fixing mechanism passes through the mounting groove and is fixedly connected with the limiting nut 4. The tensioning screw 2 is clamped and limited with the rotating box 5 through the limiting nut 4, and the top of the mounting groove is fixedly connected with a closing plate 10 by a fixing bolt. The closing plate 10 is used to fix the tensioning screw 2 in the mounting groove, thereby achieving the effect of easy disassembly while ensuring the stability of the device structure.

[0028] In this embodiment, the upper portion of the installation groove is provided with an opening that is wide at the top and narrow at the bottom to facilitate the installation of the tensioning screw 2, and the lower portion of the closing plate 10 is also provided with a shape that is wide at the top and narrow at the bottom to match the opening.

[0029] In this embodiment, fixed shafts 7 are fixedly connected to both sides of the rotating box 5, and each rotating box 5 is rotatably connected to one end of the central connecting plate 6 through the fixed shafts 7 on both sides thereof. The rotating box 5 can rotate with the fixed shaft 7 as a fulcrum, so that the tensioning screw 2 automatically adjusts the angle during the prestressing process, ensuring that the prestress in all directions is evenly distributed, thereby enhancing the reinforcement effect.

[0030] In this embodiment, threaded holes are respectively opened on both sides of the rotating box 5, and one end of the fixed shaft 7 is threadedly connected to the threaded hole, thereby achieving a fixed connection between the rotating box 5 and the fixed shaft 7, and facilitating installation and disassembly.

[0031] In this embodiment, the tensioning and fixing mechanism includes a fixing plate 1, which is provided with a through hole. The end of the tensioning screw 2 away from the central connecting mechanism passes through the through hole and is threadedly connected with an adjusting nut 8. The bottom end of the fixing plate 1 is fixedly connected with an anchor rod 9. The anchor rod 9 is fixed in the anchor hole on the surface of the structure to be reinforced 11 and is fixed by pouring anchor glue. The fixing plate 1 can ensure the stability of the device during complex surface reinforcement through the fixing effect of the anchor rod 9, and effectively prevent the occurrence of displacement or loosening.

[0032] In this embodiment, an arc-shaped anchor 3 is sleeved on the tensioning screw 2 at a position between the fixed plate 1 and the adjusting nut 8. The tensioning screw 2 and the arc-shaped anchor 3 are slidably connected. The side of the arc-shaped anchor 3 close to the fixed plate 1 is a spherical surface. The fixed plate 1 is provided with a groove matching the spherical surface of the arc-shaped anchor 3. The arc-shaped anchor 3 can rotate in the groove of the fixed plate 1, so that the tensioning screw 2 can be automatically leveled, ensuring that it can adapt to the irregular shape of complex surfaces during prestressed reinforcement in different directions.

[0033] In actual work, according to the size of the prestress to be applied, set the appropriate torque value, and use an electric wrench or a digital wrench to tighten the adjustment nuts 8 in four directions to complete the application of bidirectional prestress. The four tensioning screws 2 are arranged in four different directions respectively. Through the synchronous action of the adjustment nuts 8, it is ensured that the prestress in each direction is applied evenly, thereby effectively improving the effect of structural reinforcement.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A bidirectional prestressed tensioning device suitable for complex surfaces, characterized in that: It includes a central connecting mechanism, four tensioning screws and four tensioning fixing mechanisms. The four sides of the central connecting mechanism are respectively connected to the tensioning screws. One end of each tensioning screw away from the central connecting mechanism is clamped with the tensioning fixing mechanism through an adjusting nut. The tensioning fixing mechanism is fixedly connected to the surface of the structure to be reinforced. The distance between the tensioning fixing mechanism and the central connecting mechanism is shortened by tightening the adjusting nut, so as to perform tension reinforcement on the structure to be reinforced.

2. A bidirectional prestressed tensioning device suitable for complex surfaces according to claim 1, characterized in that: The central connection mechanism comprises a cross-shaped central connection plate, and the four ends of the central connection plate are rotatably connected to a rotating box respectively, and one end of the tensioning screw away from the tensioning fixing mechanism is connected to the rotating box.

3. A bidirectional prestressed tensioning device suitable for complex surfaces according to claim 2, characterized in that: An installation groove is opened on the upper part of the rotating box, and the end of the tensioning screw away from the tensioning fixing mechanism passes through the installation groove and is fixedly connected to a limiting nut. The top of the installation groove is fixedly connected to a closing plate by a fixing bolt, and the closing plate is used to fix the tensioning screw in the installation groove.

4. A bidirectional prestressed tensioning device suitable for complex surfaces according to claim 2, characterized in that: The two sides of the rotating box are respectively fixedly connected with fixed shafts, and each of the rotating boxes is rotatably connected to one end of the central connecting plate through the fixed shafts on both sides thereof.

5. The bidirectional prestressed tensioning device suitable for complex surfaces according to claim 1, characterized in that: The tensioning and fixing mechanism includes a fixing plate, which is provided with a through hole. One end of the tensioning screw away from the central connecting mechanism passes through the through hole and is threadedly connected with an adjusting nut. The bottom end of the fixing plate is fixedly connected with an anchor rod, and the anchor rod is fixed in the rebar embedding hole on the surface of the structure to be reinforced.

6. A bidirectional prestressed tensioning device suitable for complex surfaces according to claim 5, characterized in that: An arc-shaped anchor is sleeved on the tensioning screw at a position between the fixing plate and the adjusting nut. The side of the arc-shaped anchor close to the fixing plate is a spherical surface. The fixing plate is provided with a groove matching the spherical surface of the arc-shaped anchor.

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