Tensioning anchorage device for prestressed connector

Abstract

The tensioning anchorage device comprises a supporting plate, mounting holes are formed in the outer surface of the supporting plate, a mounting plate is arranged on one side of the supporting plate, a mounting cylinder is fixedly arranged on the side surface of the mounting plate, an anti-skid clamping mechanism is arranged at one end of the mounting plate, and the anti-skid clamping mechanism is arranged at the other end of the mounting plate. And retraction of the pull anchor is prevented through a multi-point clamping mode, so that the stability of the pull anchor is ensured. According to the tensioning anchorage device for the prestress connector, the fixed clamping plate and the movable clamping plate are adopted for relatively moving and clamping after the steel cable penetrates into the tensioning anchorage device, so that the steel cable is clamped in the tensioning process, the steel cable does not slip or retract relative to the center column in the tensioning process, and therefore it is guaranteed that the pre-tensioning force is kept; the pressing clamping sleeve is screwed into the mounting cylinder to extrude the extrusion block, so that the extrusion block can slide to drive the movable clamping plate to slide, the movable clamping plate and the fixed clamping plate are staggered to clamp the steel cable, and the friction force between the steel cable and the movable clamping plate and the friction force between the steel cable and the fixed clamping plate are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of tension anchors, in particular to a tension anchor for a prestressed connector. Background Art

[0002] The principle of prestressed connectors is to apply the principle of prestressing. By applying prestress on the components, the purpose of enhancing material strength and improving the bearing capacity of the structure is achieved. The basic structure of prestressed connectors consists of two parts: prestressed steel bars and anchors. The prestressed steel bars can withstand tension and are used in conjunction with the anchors. By fixing the anchors, the prestressed steel bars on the components reach a prestressed state. The threaded prestressed connector is composed of two parts, one end is internally threaded and the other end is externally threaded. Through the cooperation of internal and external threads, a prestressed connection is formed on the component. This connector has a simple structure, is easy to use, and has a wide range of applications. The channel steel prestressed connector is composed of two channel steels. The component prestressed steel bars pass through the channel steel to form a prestressed connection in the channel steel. It can be used to reinforce and strengthen components. In addition, the embedded prestressed connector is suitable for structures that require a long-term prestressed state. By fixing the prestressed steel bars on the anchors and embedding the anchors in the concrete, a prestressed connection is achieved, giving the components a long-term and stable bearing capacity. The prestressed connector is an advanced device for connecting and fixing components. It has the advantages of high structural strength and ease of use. It has been widely used in construction projects.

[0003] The classification of prestressed anchors includes tensioning end anchors and fixed end anchors. The former is installed at the end of the prestressed tendons and can be tensioned, while the latter is embedded in the concrete and does not need to be tensioned. The working principle of prestressed anchors is mainly based on the transmission and anchoring of tensioning stress. According to different uses and structural forms, prestressed anchors can be divided into many types, such as clip-type anchors, cone-plug anchors, grip-type anchors, etc. These anchors have their own characteristics and are suitable for different prestressed tensioning processes and engineering requirements. The principle of tensioning anchors is mainly to utilize the prestressing principle. By tensioning the anchors, pre-compression stress is generated, thereby improving the bearing capacity and deformation resistance of the structure. This pre-compression stress can offset part of the tensile stress generated by external loads, so that the structure maintains better working performance under stress. The basic principle of tensioning anchors is to transfer the tensile force of the prestressed tendons to the interior of the concrete through tensioning operations, thereby enhancing the stability and bearing capacity of the structure. Specifically, the design and manufacture of tensioning anchors take into account the use of high-strength materials to ensure that they can withstand larger The tension and pressure can ensure the safety and stability of the engineering structure. Before the anchor cable is tensioned, the anchor cable is first passed through the anchor, and then the anchor cable is connected to the prestressed steel strand. By starting the hydraulic pump, liquid is injected into the oil cylinder to extend the piston rod, thereby gradually stretching the anchor cable to generate prestress. When the preset tensioning force is reached, the hydraulic pump is turned off and the injection of liquid is stopped. At this time, the prestressed steel strand in the anchor cable has reached the predetermined tensioning force, and the stability and bearing capacity of the structure are improved. After the tensioning is completed, the anchor cable needs to be locked. Anchoring agents are usually used to fix the anchor cable in the rock and soil to ensure its long-term stability. However, during the tensioning process, as the tensioning force increases, the anchor cable is affected by the compression force and the surface roughness, and it is easy to slip, which causes the tensioning force to change before the anchor cable is fixed, affecting the safety and stability of the overall engineering structure. Utility Model Content

[0004] The purpose of the utility model is to provide a tensioning anchor for a prestressed connector, so as to solve the problem of slippage during the fixing process of the anchor cable proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tensioning anchor for a prestressed connector, comprising a support plate, an outer surface of which is provided with a mounting hole, a mounting plate is provided on one side of the support plate, and a mounting tube is fixedly provided on the side surface of the mounting plate, and an anti-slip clamping mechanism is provided at one end of the mounting plate, which prevents the retraction of the tension anchor by multi-point clamping to ensure the stability of the tension anchor.

[0006] Preferably, the anti-slip clamping mechanism includes: a center column, the center column is fixedly arranged on the outer surface of the mounting plate, and a penetration groove is provided inside the side surface of the center column, a fixed clamping plate is fixedly provided inside the penetration groove, and a sliding movable clamping plate is installed inside the penetration groove, a yield groove is provided on the outer surface of the center column, an extrusion block is fixedly provided on the outer surface of the movable clamping plate, a pressing sleeve is installed on the inner surface of the mounting cylinder, and an extrusion groove is provided on the inner surface of the pressing sleeve, the outer surfaces of the support plate, the mounting plate and the center column are penetrated by a steel cable, a positioning groove is provided on the outer surface of the support plate facing the mounting plate, and a support column is provided between the support plate and the mounting plate facing each other.

[0007] By adopting the above technical solution, the steel cable can be stably clamped during the tensioning process, preventing sliding and retraction during the tensioning process.

[0008] Preferably, the support plate and the mounting plate are concentrically designed, and the mounting tube is arranged on a side of the mounting plate facing away from the support plate.

[0009] By adopting the above technical solution, the support plate and the mounting plate can be supported by the hydraulic jack.

[0010] Preferably, the central column is concentric with the mounting plate, and the end of the central column away from the mounting plate is truncated into a cone shape.

[0011] By adopting the above technical solution, the central column can be stably supported by the mounting plate.

[0012] Preferably, the fixed splint and the movable splint are staggered, and one end of the steel cable is located between the ends of the fixed splint and the movable splint that face each other.

[0013] By adopting the above technical solution, the fixed clamp and the movable clamp can stably clamp and limit the inserted steel cable to prevent it from retracting.

[0014] Preferably, the extrusion block is designed as a right-angled trapezoid, and one end of the extrusion block passes through the clearance groove, and the inclined surface of the extrusion block fits with the inner surface of the extrusion groove.

[0015] By adopting the above technical solution, when the inclined surface of the extrusion block is under pressure, it can drive the movable clamping plate to slide and clamp the steel cable.

[0016] Preferably, the compression jacket is threadedly connected to the mounting tube, and the inner surface of the compression jacket is in contact with the outer surface of the center column.

[0017] By adopting the above technical solution, the compression sleeve can ensure stable extrusion of the extrusion block through the threaded connection with the mounting cylinder.

[0018] Preferably, the support columns are respectively engaged and installed with the support plate and the mounting plate through positioning grooves, and the support columns and the mounting holes are staggered.

[0019] By adopting the above technical solution, the support column can support and maintain the tension between the support plate and the mounting plate after the tensioning is completed.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the tension anchor for the prestressed connector:

[0021] 1. The fixed and movable splints are used to move relative to each other after the steel cable is inserted to clamp the steel cable during the tensioning process, so that the steel cable will not slip and retract relative to the center column during the tensioning process, thereby ensuring that the pre-tensioning force is maintained;

[0022] 2. Furthermore, the compression sleeve is screwed into the installation tube to squeeze the extrusion block, so that the extrusion block can slide to drive the movable splint to slide, and the movable splint and the fixed splint are used to clamp the steel cable in an alternating manner, thereby increasing the friction between the steel cable and the movable splint and the fixed splint, making the clamping more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the support plate, mounting hole and mounting plate connection of the utility model;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the overall cross-section of the utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the connection section of the installation cylinder, the center column and the compression jacket of the utility model;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the connection between the central column and the penetration groove of the utility model;

[0028] Figure 6 It is a schematic diagram of the overall three-dimensional explosion structure of the utility model.

[0029] In the figure: 1. Support plate; 2. Mounting hole; 3. Mounting plate; 4. Mounting tube; 5. Center column; 6. Insertion groove; 7. Fixed splint; 8. Movable splint; 9. Clearance groove; 10. Extrusion block; 11. Pressing sleeve; 12. Extrusion groove; 13. Steel cable; 14. Positioning groove; 15. Support column. DETAILED DESCRIPTION

[0030] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0031] See also Figures 1-6 The utility model provides a technical solution: a tension anchor for a prestressed connector, comprising a support plate 1, a mounting hole 2 being provided on the outer surface of the support plate 1, a mounting plate 3 being provided on one side of the support plate 1, and a mounting tube 4 being fixedly provided on the side surface of the mounting plate 3, and an anti-slip clamping mechanism being provided at one end of the mounting plate 3, which prevents the anchor from retracting by clamping at multiple points and ensures the stability of the anchor;

[0032] The support plate 1 and the mounting plate 3 are concentrically designed, and the mounting tube 4 is arranged on the side of the mounting plate 3 facing away from the support plate 1;

[0033] The anti-slip clamping mechanism includes: a center column 5, the center column 5 is fixedly arranged on the outer surface of the mounting plate 3, and a penetration groove 6 is opened inside the side surface of the center column 5, a fixed clamping plate 7 is fixedly arranged inside the penetration groove 6, and a sliding movable clamping plate 8 is installed inside the penetration groove 6, a yield groove 9 is opened on the outer surface of the center column 5, an extrusion block 10 is fixedly arranged on the outer surface of the movable clamping plate 8, a pressing sleeve 11 is installed on the inner surface of the mounting cylinder 4, and an extrusion groove 12 is opened on the inner surface of the pressing sleeve 11, the outer surfaces of the support plate 1, the mounting plate 3 and the center column 5 are penetrated by a steel cable 13, a positioning groove 14 is opened on the outer surface of the support plate 1 on the side facing the mounting plate 3, and a support column 15 is provided between the support plate 1 and the side facing the mounting plate 3;

[0034] The center column 5 is designed to be concentric with the mounting plate 3, and the end of the center column 5 away from the mounting plate 3 is designed to be frustum-shaped;

[0035] The fixed splint 7 and the movable splint 8 are staggered, and one end of the steel cable 13 is located between the ends of the fixed splint 7 and the movable splint 8 that face each other.

[0036] The extrusion block 10 is designed as a right-angled trapezoid, and one end of the extrusion block 10 passes through the clearance groove 9, and the inclined surface of the extrusion block 10 fits the inner surface of the extrusion groove 12;

[0037] The compression jacket 11 is threadedly connected to the mounting tube 4, and the inner surface of the compression jacket 11 is in contact with the outer surface of the center column 5;

[0038] The support column 15 is respectively engaged with the support plate 1 and the mounting plate 3 through the positioning groove 14, and the support column 15 and the mounting hole 2 are staggered;

[0039] During the anchoring process, the steel cable 13 is first passed through the support plate 1 and the mounting plate 3 at one time until one end of the steel cable 13 is inserted into the insertion groove 6 and passes through the center column 5. Then the clamping sleeve 11 is screwed into the mounting tube 4. At this time, the clamping sleeve 11 is pressed through the extrusion groove 12 to squeeze the inclined surface of the extrusion block 10 protruding from the give way groove 9. The extrusion block 10 slides and drives the movable clamping plate 8 to move toward the fixed clamping plate 7 to clamp the steel cable 13.

[0040] Then fix the support plate 1 to the fixed base through the mounting hole 2 and bolts, and then use the hydraulic jack to place it between the support plate 1 and the mounting plate 3 for support and tensioning until the support column 15 can be placed between the support plate 1 and the mounting plate 3 and engage with the positioning groove 14 on the side surface of the support plate 1. Then release the hydraulic jack so that the support column 15 supports the support plate 1 and the mounting plate 3. Then use an anchoring agent to fix one end of the steel cable 13 in the rock and soil to ensure its long-term stability.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tension anchor for a prestressed connector, comprising a support plate (1), wherein an outer surface of the support plate (1) is provided with a mounting hole (2), a mounting plate (3) is provided on one side of the support plate (1), and a mounting tube (4) is fixedly provided on the side surface of the mounting plate (3), characterized in that: One end of the mounting plate (3) is provided with an anti-slip clamping mechanism, which prevents the anchor from retracting by clamping at multiple points, thereby ensuring the stability of the anchor. The anti-slip clamping mechanism comprises: a central column (5), the central column (5) is fixedly arranged on the outer surface of the mounting plate (3), and a penetration groove (6) is provided inside the side surface of the central column (5), a fixed clamping plate (7) is fixedly provided inside the penetration groove (6), and a sliding movable clamping plate (8) is installed inside the penetration groove (6), a yielding groove (9) is provided on the outer surface of the central column (5), and an extrusion block is fixedly provided on the outer surface of the movable clamping plate (8) (10), a compression sleeve (11) is installed on the inner surface of the mounting tube (4), and an extrusion groove (12) is provided on the inner surface of the compression sleeve (11), the outer surfaces of the support plate (1), the mounting plate (3) and the center column (5) are penetrated by a steel cable (13), a positioning groove (14) is provided on the outer surface of the side facing the support plate (1) and the mounting plate (3), and a support column (15) is provided between the sides facing each other of the support plate (1) and the mounting plate (3).

2. A tension anchor for a prestressed connector according to claim 1, characterized in that: The support plate (1) and the mounting plate (3) are designed to be concentric, and the mounting tube (4) is arranged on a side of the mounting plate (3) facing away from the support plate (1).

3. The tension anchor for a prestressed connector according to claim 1, characterized in that: The central column (5) is designed to be concentric with the mounting plate (3), and the end of the central column (5) away from the mounting plate (3) is designed to be truncated cone-shaped.

4. A tension anchor for a prestressed connector according to claim 1, characterized in that: The fixed splint (7) and the movable splint (8) are designed to be staggered, and one end of the steel cable (13) is located between the ends of the fixed splint (7) and the movable splint (8) facing each other.

5. The tension anchor for a prestressed connector according to claim 1, characterized in that: The extrusion block (10) is designed as a right-angled trapezoid, and one end of the extrusion block (10) passes through the clearance groove (9), and the inclined surface of the extrusion block (10) fits the inner surface of the extrusion groove (12).

6. The tension anchor for a prestressed connector according to claim 1, characterized in that: The compression sleeve (11) is threadedly connected to the mounting tube (4), and the inner surface of the compression sleeve (11) is in contact with the outer surface of the center column (5).

7. The tension anchor for a prestressed connector according to claim 1, characterized in that: The support column (15) is respectively engaged and installed with the support plate (1) and the mounting plate (3) through the positioning groove (14), and the support column (15) and the mounting hole (2) are staggered.

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