Device for releasing prestressed tension end concrete crushing steel strand

Abstract

The invention relates to a prestress tension end concrete crushing steel strand releasing device which comprises an anchor disc, an anchoring disc is fixedly arranged on the anchor disc, a perforated disc is fixedly arranged above the anchoring disc, a plurality of through holes are formed in the perforated disc, and a plurality of detection unit structures are evenly distributed on the periphery of the anchoring disc. A signal transmission antenna is arranged on the anchor disc, and an old anchor groove is formed in the bottom surface of the anchor disc; the stress surface is increased by adding the anchor disc, so that the bearing capacity of the tensioning end is improved, the stress condition of the tensioning end is mastered in real time through the detection unit structure, the stress direction and condition of the anchor are judged, and the bearing condition of the tensioning end can be found in time.

Description

Technical Field

[0001] The invention relates to the technical field of prestressed concrete, and in particular to a device for releasing the tension of a prestressed steel strand by crushing concrete at the tensioning end of the prestressed steel strand. Background Art

[0002] In the field of wind power generation, the foundation of the hybrid tower of onshore wind turbines is a hollow foundation, and the foundation adopts a gravity-type extended foundation. The prestressed anchoring system of the hybrid tower is embedded in the foundation. As the power of onshore wind power increases, the length of the prestressed steel strand bundle is also getting longer and longer, and the tensioning construction specifications of its long bundles are becoming more and more important. Prestressed construction should be given a particularly important position. Choosing the correct construction process and taking strict process control measures are the basis for ensuring the construction process of prestressed steel strands. In prestressed concrete structures, the tensioning end concrete is a component that transfers prestress between the prestressed steel strands and concrete. When the tensioning end concrete is damaged during the construction process, tension collapse will occur. This phenomenon usually occurs at the last anchor end of the tensioning process, which will cause the prestressed steel strand to lose its prestress. If it is not handled in time, it will have a significant impact on the entire structure. Summary of the invention

[0003] In view of the above problems existing in the prior art, the main purpose of the present invention is to provide a device for releasing the prestressed tensioning end concrete crushing steel strand.

[0004] The technical solution of the present invention is as follows: a device for releasing the tension of a prestressed tensioning end concrete crushing steel strand, comprising an anchor plate, on which an anchor plate is fixedly provided, above which a perforated plate is fixedly provided, on which a plurality of through holes are provided, and around which a plurality of detection unit structures are evenly distributed, on which a signal transmission antenna is provided, and on the bottom surface of which an old anchor groove is provided.

[0005] As a preferred embodiment, the detection unit structure includes an L-plate, one end of the L-plate is fixedly connected to a fastening bolt, and a rotating seat is fixedly provided on the side of the other end of the L-plate, and the rotating seat is rotatably connected to a cross bar, and vertical bars are provided at both ends of the cross bar. A spring is sleeved on the vertical bar, one end of the spring is in contact with the vertical bar, and a vertical pressure sensor is provided on the other end. A lateral pressure sensor is provided inside the anchor plate on one side of the rotating seat.

[0006] As a preferred implementation, a placement groove is provided around the anchor plate, the vertical rod is fixedly connected inside the placement groove, and the lateral pressure sensor is fixed inside the anchor plate.

[0007] As a preferred implementation, a power supply and a circuit board are provided inside the anchor plate, the vertical pressure sensor and the lateral pressure sensor are electrically connected to the circuit board, and the signal transmission antenna is electrically connected to a mobile terminal.

[0008] As a preferred implementation, one end of the L-plate contacts the lateral pressure sensor, and the fastening bolt fixes the connected steel strand.

[0009] As a preferred implementation, the steel strand passes through the through hole, the old anchoring system is provided in the old anchor groove, and a clip is provided on the through hole.

[0010] Compared with the prior art, the advantages and positive effects of the present invention are that the force-bearing surface is increased by adding an anchor plate, thereby improving the bearing capacity of the tensioning end, and the force condition of the tensioning end is grasped in real time through the detection unit structure, the force direction and condition of the anchor are judged, and the bearing condition of the tensioning end is discovered in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The present invention provides a schematic diagram of the overall structure of a device for releasing the tension of a prestressed tensioning end concrete crushing steel strand;

[0012] Figure 2 The present invention provides a schematic diagram of the position of the old anchor groove of a device for releasing the tension of a prestressed tensioning end concrete crushing steel strand;

[0013] Figure 3 The present invention provides a schematic structural diagram of a detection unit of a device for releasing the tension of a prestressed tensioning end concrete crushing steel strand.

[0014] Legend: 1. Anchor plate; 2. Anchor plate; 3. Perforated plate; 4. Through hole; 5. Detection unit structure; 51. L-plate; 52. Fastening bolt; 53. Rotating seat; 54. Cross bar; 55. Vertical bar; 56. Spring; 57. Vertical pressure sensor; 58. Horizontal pressure sensor; 6. Signal transmission antenna; 7. Old anchor groove. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example

[0020] A device for releasing the tension of a prestressed tensioning end concrete crushing steel strands comprises an anchor plate 1, an anchor plate 2 is fixedly provided on the anchor plate 1, a perforated plate 3 is fixedly provided above the anchor plate 2, a plurality of through holes 4 are provided on the perforated plate 3, a plurality of detection unit structures 5 are evenly distributed around the anchor plate 2, a signal transmission antenna 6 is provided on the anchor plate 1, an old anchor groove 7 is provided on the bottom surface of the anchor plate 1, the protruding end of the old anchor system is placed in the old anchor groove 7, the anchor plate 1 is fixed to the outer surface of the concrete, the contact area is increased, and the bearing capacity of the tensioning end is improved, the detection unit structure 5 is used to detect the vertical and lateral forces received, and the concrete prestressing condition is detected, so as to find problems in time and perform maintenance.

[0021] The detection unit structure 5 includes an L-plate 51, one end of which is fixedly connected to a fastening bolt 52, and a rotating seat 53 is fixedly arranged on the side of the other end of the L-plate 51, and the rotating seat 53 is rotatably connected to a cross bar 54, and vertical rods 55 are arranged at both ends of the cross bar 54, and a spring 56 is sleeved on the vertical rod 55, one end of the spring 56 is in contact with the vertical rod 55, and a vertical pressure sensor 57 is arranged at the other end. Inside the anchor plate 2, a lateral pressure sensor 58 is arranged on one side of the rotating seat 53, and the fastening bolt 52 is fixedly connected to the steel strand. When the steel strand moves vertically downward, it will drive the L-plate 51 to move as a whole. The spring 56 will be subjected to pressure and the pressure value will be detected. If the pressure values ​​around the anchor plate 2 are consistent, it means that the steel strand is not tilted, the old anchor system located in the concrete is evenly stressed, and the concrete is not damaged. If the pressure values ​​around the anchor plate 2 show a large deviation, it means that the outer surface of the concrete is damaged. The damaged concrete will have a part located inside the concrete and the other part exposed. At this time, the lateral pressure sensors 58 around the inside of the anchor plate 2 will detect the extrusion of the L plate 51 and generate data, which is convenient for detecting the damaged position and performing maintenance in time.

[0022] An accommodating groove is provided around the anchor plate 2, the vertical rod 55 is fixedly connected inside the accommodating groove, and the lateral pressure sensor 58 is fixed inside the anchor plate 2. Placing the vertical rod 55 and the lateral pressure sensor 58 inside the anchor plate 2 can protect the circuit components from damage and extend the service life of the equipment.

[0023] A power supply and a circuit board are provided inside the anchor plate 1. The vertical pressure sensor 57 and the lateral pressure sensor 58 are electrically connected to the circuit board. The signal transmission antenna 6 is electrically connected to the mobile terminal. The mobile terminal is used to observe the changes in concrete prestress, which is convenient for controlling the prestress and performing maintenance in time.

[0024] One end of the L-plate 51 is in contact with the lateral pressure sensor 58. When the pulling direction of the steel strand is not in a vertical pulling state but in an inclined state, the pressure in the inclined direction can be detected. If the pressure on the concrete is within the bearing range of the concrete, no maintenance is required. If it exceeds the bearing range of the concrete, maintenance is required.

[0025] The steel strand is passed through the through hole 4, and the old anchoring system is arranged in the old anchor groove 7 in a suspended state without being subjected to force. A clip is arranged on the through hole 4 of the old anchoring system, and the steel strand is fixed by the clip to prevent the steel strand from detaching.

[0026] Working principle:

[0027] As shown in the figure, when in use, align the old anchor system with the position of the old anchor groove 7 so that the old anchor system is suspended in the old anchor groove 7, and then fix the anchor plate 1 to the outer surface of the concrete, and expose the steel strand from the through hole 4. Fix the fastening bolt 52 to the outermost steel strand of the through hole 4. In a static state, there is no external pulling force. The pressure value generated by the spring 56 on the vertical pressure sensor 57 is the initial value. After the prestress of the concrete changes, the steel strand moves, and the pressure value generated by the spring 56 on the vertical pressure sensor 57 will be transmitted to the mobile terminal. The values ​​of the vertical pressure sensors 57 at multiple points on the end are analyzed. If the values ​​are consistent, it means that the force is uniform and the concrete prestressing has not damaged the concrete structure. If the values ​​fluctuate greatly, it means that the concrete is damaged and needs timely maintenance. When the steel strand moves tilted, the L-plate 51 can rotate. The pressure on one side of the rotation direction will be transmitted to the mobile terminal through the lateral pressure sensor 58 squeezed by the L-plate 51. The values ​​of the lateral pressure sensors 58 at multiple points on the mobile terminal are analyzed to determine the force in the rotation direction and grasp the situation of the concrete prestressing in real time.

[0028] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for releasing the tension of a prestressed steel strand by crushing concrete at the tensioning end, comprising an anchor plate (1), characterized in that: An anchor plate (2) is fixedly arranged on the anchor plate (1), a perforated plate (3) is fixedly arranged above the anchor plate (2), a plurality of through holes (4) are provided on the perforated plate (3), a plurality of detection unit structures (5) are evenly distributed around the anchor plate (2), a signal transmission antenna (6) is provided on the anchor plate (1), and an old anchor groove (7) is provided on the bottom surface of the anchor plate (1).

2. The device for releasing the prestressed steel strand by crushing the prestressed steel strand at the tensioning end according to claim 1, characterized in that: The detection unit structure (5) comprises an L-plate (51), one end of the L-plate (51) is fixedly connected to a fastening bolt (52), the other end of the L-plate (51) is fixedly provided with a rotating seat (53), the rotating seat (53) is rotatably connected to a cross bar (54), both ends of the cross bar (54) are provided with vertical rods (55), a spring (56) is sleeved on the vertical rod (55), one end of the spring (56) is in contact with the vertical rod (55), and the other end is provided with a vertical pressure sensor (57), and a lateral pressure sensor (58) is provided inside the anchor plate (2) and located on one side of the rotating seat (53).

3. The device for releasing the prestressed steel strand by crushing the prestressed steel strand at the tensioning end according to claim 2, characterized in that: The anchor plate (2) is provided with a placement groove around its periphery, the vertical rod (55) is fixedly connected inside the placement groove, and the lateral pressure sensor (58) is fixed inside the anchor plate (2).

4. The device for releasing the prestressed steel strand by crushing the prestressed steel strand at the tensioning end according to claim 1, characterized in that: A power source and a circuit board are provided inside the anchor plate (1); the vertical pressure sensor (57) and the lateral pressure sensor (58) are both electrically connected to the circuit board; and the signal transmission antenna (6) is electrically connected to a mobile terminal.

5. The device for releasing the prestressed steel strand by crushing the prestressed steel strand at the tensioning end according to claim 2, characterized in that: One end of the L-plate (51) contacts the lateral pressure sensor (58), and the fastening bolt (52) is fixedly connected to the steel strand.

6. The device for releasing the prestressed steel strand by crushing the prestressed steel strand at the tensioning end according to claim 1, characterized in that: The steel strand passes through the through hole (4), an old anchoring system is provided in the old anchor groove (7), and a clip is provided on the through hole (4).

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