Prestressed steel wire rope tensioning and anchoring device

Abstract

The utility model discloses a prestressed steel wire rope tensioning and anchoring device, and belongs to the technical field of building construction. Comprising an anchor plate, a wedge-shaped groove, a wedge-shaped block and a spring, the anchor plate is provided with a steel wire rope channel and a fixing hole, and the fixing hole is used for installing a bolt; the wedge-shaped groove is formed in the anchor plate; the steel wire rope channel is communicated with the wedge-shaped groove and the outside of the anchor plate; the wedge-shaped block is arranged in the wedge-shaped groove and provided with a stop groove, and the stop groove is used for limiting the steel wire rope; the spring is arranged in the wedge-shaped groove and abuts against the wedge-shaped block. Due to the design of the wedge-shaped groove and the wedge-shaped block, automatic locking can be effectively achieved when prestress is applied, the spring provides initial fixing force, and it is guaranteed that the steel wire rope does not slip when inserted; the wedge-shaped groove and the wedge-shaped block in the anchor plate enable the inserted steel wire rope to be locked when the steel wire rope is pulled out, and the steel wire rope at the anchoring end cannot be exposed outside the anchor plate.

Description

Technical Field

[0001] The utility model relates to the field of construction engineering, in particular to a prestressed steel wire rope tensioning and anchoring device. Background Art

[0002] Prestressed steel wire ropes are widely used in the field of construction engineering, especially in the construction of bridges, tunnels, high-rise buildings and large infrastructure. Its main purpose is to enhance the tensile strength and overall stability of concrete structures by applying prestress, thereby improving the bearing capacity and service life of buildings. The application of prestressed steel wire ropes effectively improves the mechanical properties of the structure, reduces the occurrence of cracks, and improves the durability of the structure.

[0003] The prestressed steel wire rope tensioning anchor device applies a predetermined tension to the prestressed steel wire rope during the construction process and then fixes it in the concrete structure. It ensures that the prestressed steel wire rope remains in a stressed state after the prestress is applied, thereby transferring the prestress to the concrete structure and increasing the stability and bearing capacity of the structure.

[0004] A utility model patent with publication number CN205617660U discloses a rewinding prestressed steel wire rope anchoring system, but the anchoring device in the system still has some problems when in use.

[0005] Among them, the steel wire rope of the tensioning anchor device is locked outside the anchor plate, and part of the steel wire rope at the locking part will be exposed. This not only makes the steel wire rope susceptible to corrosion and mechanical damage in the environment, reducing its service life and bearing capacity, but also increases the potential safety hazards during construction. In addition, there are also deficiencies in the uniform distribution of tensioning force and construction convenience. Therefore, an improved prestressed steel wire rope tensioning anchor device is urgently needed to solve the problem of exposed steel wire ropes and improve construction safety and structural durability. Summary of the invention

[0006] In view of the above-mentioned problems, the utility model aims to provide a prestressed steel wire rope tensioning anchoring device to at least improve the phenomenon of the steel wire rope being exposed at the anchoring end.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A prestressed steel wire rope tensioning anchoring device comprises an anchor plate, wherein the anchor plate is provided with a steel wire rope passage and a plurality of fixing holes, wherein the plurality of fixing holes are used for installing bolts, and a wedge-shaped groove is provided inside the anchor plate, wherein the steel wire rope passage axially connects the narrow end of the wedge-shaped groove and the outside of the anchor plate, and a self-locking mechanism for fixing the steel wire rope is provided inside the wedge-shaped groove.

[0009] By adopting the above technical solution, the wire rope is inserted from the wire rope channel into the anchor plate until it is inside the wedge-shaped groove. When the wire rope is pulled out, the design of the wedge-shaped groove and the internal self-locking mechanism utilizes the wedging effect of the wedge block to produce a self-locking effect, thereby automatically locking the wire rope and anchoring the wire rope. The design of the wedge-shaped groove and the self-locking mechanism being completely inside the anchor plate prevents the wire rope at the anchoring end from being exposed outside the anchor plate, reduces corrosion and mechanical damage to the wire rope by the external environment, and improves the durability and safety of the structure.

[0010] Furthermore, the self-locking mechanism includes: a wedge block, which is slidably arranged in the wedge groove and is used to limit the wire rope; and a spring, which is arranged inside the wedge groove and abuts against the wedge block.

[0011] By adopting the above technical solution, the design of the wedge block and the spring provides a preliminary fixing force when the prestress is applied. The thrust of the spring ensures that the wedge block always keeps the steel wire rope pressed tightly to prevent the steel wire rope from slipping during the insertion process. The wedge block is further wedged under the action of the prestress to achieve a tight lock, which increases the reliability and durability of the self-locking mechanism.

[0012] Furthermore, each wedge-shaped groove is evenly and symmetrically provided with at least two wedge-shaped blocks along the circumferential direction, and the centers of the at least two wedge-shaped blocks form a stop groove, and the wire rope runs through the stop groove.

[0013] By adopting the above technical solution, multiple wedge blocks evenly arranged circumferentially ensure that the wire rope is evenly stressed in all directions. The symmetrical design of the wedge blocks enables each wedge block to slide synchronously when stressed, achieving synchronous locking, improving the stability and durability of the self-locking mechanism, reducing local stress concentration, and avoiding single-point overload.

[0014] Preferably, a friction structure is provided on the surface of the retaining groove.

[0015] By adopting the above technical solution, the friction structure on the surface of the stop groove significantly increases the friction between the wire rope and the wedge block. The friction structure, such as the sawtooth or groove design, provides additional friction when the wire rope is prestressed, ensuring that the wire rope does not slip after the prestress is applied, thereby enhancing the locking effect and the safety of the device.

[0016] Preferably, the wedge-shaped groove is arranged in the middle of the anchor plate, and the wide end of the wedge-shaped groove is also connected to a wire rope channel.

[0017] By adopting the above technical solution, the completely internal wedge-shaped groove improves the protection effect of the wire rope. At the same time, the wire rope can smoothly penetrate into and pass through the anchor plate from one end, thereby improving construction efficiency, ensuring uniform application of prestress, and avoiding difficulties in alignment and adjustment.

[0018] Furthermore, the anchor plate is a two-half structure perpendicular to the axial direction of the fixing hole, and the wedge-shaped groove and the wire rope channel are evenly separated.

[0019] By adopting the above technical solution, in the rare case that disassembly and replacement may be required, the two-half anchor plate structure provides conditions for the disassembly of the entire anchoring device, making the disassembly and replacement process more convenient and reducing maintenance time and cost.

[0020] Compared with the prior art, the improvements of the present invention are:

[0021] 1. The design of the wedge-shaped groove and wedge-shaped block inside the anchor plate effectively realizes automatic locking when prestressing is applied, and the spring provides the initial fixing force to ensure that the wire rope does not slip when inserted; the wedge-shaped groove and wedge-shaped block inside the anchor plate lock the inserted wire rope when it is pulled out, and the wire rope at the anchor end will not leak outside the anchor plate. It can improve the corrosion and mechanical damage of the wire rope in the environment, and reduce the safety hazards during the construction process.

[0022] 2. Multiple wedge blocks evenly arranged around the circumference ensure that the wire rope is evenly stressed in all directions, reducing local stress concentration and single-point overload. In addition, the fully through wire rope channel design simplifies the installation process of the wire rope, improves construction efficiency, and ensures uniform application of prestress. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 This is a schematic cross-sectional structure diagram of a prestressed steel wire rope tensioning and anchoring device according to Embodiment 1 of the present utility model;

[0025] Figure 2 This is a schematic cross-sectional structure diagram of an anchor plate of a prestressed steel wire rope tensioning anchoring device according to Embodiment 1 of the utility model;

[0026] Figure 3 This is a structural schematic diagram of a wedge-shaped block of a prestressed steel wire rope tensioning and anchoring device according to the first embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the application of a prestressed steel wire rope tensioning anchoring device according to the first embodiment of the utility model;

[0028] Figure 5 This is a ray perspective view of a prestressed steel wire rope tensioning anchoring device according to the second embodiment of the utility model;

[0029] Figure 6This is a structural schematic diagram of a prestressed steel wire rope tensioning and anchoring device according to Embodiment 3 of the present utility model;

[0030] Among them: 1. anchor plate; 11. wire rope channel; 12. wedge-shaped groove; 13. fixing hole; 2. wedge-shaped block; 21. stop groove; 3. spring. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "front end", "back end", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0033] In the description of this application, it should also be noted 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 direct connection, or an indirect connection 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 this application can be understood according to specific circumstances.

[0034] Embodiment 1:

[0035] See attached Figures 1 to 4 A prestressed steel wire rope tensioning anchoring device shown includes an anchor plate 1, the anchor plate 1 is provided with a steel wire rope passage 11 and a plurality of fixing holes 13, the plurality of fixing holes 13 are used to install bolts, and a wedge-shaped groove 12 is provided inside the anchor plate 1, the steel wire rope passage 11 axially connects the narrow end of the wedge-shaped groove 12 and the outside of the anchor plate 1, and a self-locking mechanism for fixing the steel wire rope is provided inside the wedge-shaped groove 12. The steel wire rope is inserted from the steel wire rope passage 11 into the inside of the wedge-shaped groove 12. When the steel wire rope is pulled out, the design of the wedge-shaped groove 12 and the internal self-locking mechanism utilizes the wedging effect of the wedge block 2 to produce a self-locking effect, thereby realizing automatic locking of the steel wire rope and anchoring the steel wire rope. The design of the wedge-shaped groove 12 and the self-locking mechanism being completely inside the anchor plate 1 prevents the steel wire rope at the anchoring end from being exposed outside the anchor plate 1, reduces the corrosion and mechanical damage of the steel wire rope by the external environment, and improves the durability and safety of the structure.

[0036] Furthermore, the self-locking mechanism includes a wedge block 2 and a spring 3. The wedge block 2 is slidably disposed in the wedge groove 12, and the wedge block 2 is used to limit the wire rope; the spring 3 is disposed inside the wedge groove 12, and the leftmost ring of the spring 3 is fixed to the inner side wall of the wedge groove 12, and the right side of the spring 3 abuts against the wedge block 2. The design of the wedge block 2 and the spring 3 provides a preliminary fixing force when prestress is applied. Specifically, the thrust of the spring 3 ensures that the wedge block 2 always keeps the wire rope pressed tightly to prevent the wire rope from slipping during the insertion process. The wedge block 2 is further wedged under the action of the prestress to achieve a tight lock, which can increase the reliability and durability of the self-locking mechanism.

[0037] Furthermore, if Figure 3 As shown, each wedge groove 12 is evenly and symmetrically arranged with at least two wedge blocks 2 along the circumference, and the centers of at least two wedge blocks 2 form a stop groove 21, and the wire rope runs through the stop groove 21. Specifically, the multiple wedge blocks 2 evenly arranged along the circumference ensure that the force on the wire rope is uniform in all directions. The symmetrical design of the wedge blocks 2 enables each wedge block 2 to slide synchronously when subjected to force, realize synchronous locking, improve the stability and durability of the self-locking mechanism, reduce local stress concentration, and avoid single-point overload.

[0038] Preferably, a friction structure is provided on the surface of the stop groove 21. The friction structure on the surface of the stop groove 21 can significantly increase the friction between the wire rope and the wedge block 2, ensuring that the wire rope does not slip after the prestress is applied, and improving the locking effect and the safety of the device. Specifically, the friction structure can be a serrated, rough surface, a groove structure, a convex point structure, a grid structure, a corrugated structure, sand embedded or a combination of these structures, thereby providing multiple ways to increase the friction and ensure that the wire rope is firmly locked.

[0039] For specific use, refer to Figure 4 After removing the spring 3, it can be used as a tensioning end. The wide end of the wedge block 2 abuts against the front card jack, and the wire rope can be tensioned.

[0040] Specific application cases:

[0041] In the production of precast concrete panels, in order to improve the tensile strength and durability of the precast panels, prestressed steel wire ropes need to be added to the precast panels. This process requires ensuring that the steel wire ropes can be firmly anchored in the precast panels and maintain a stable stress state during production and installation.

[0042] Application steps:

[0043] 1. Preparation. Set the anchor plate 1 in the prefabricated plate mold and ensure that the position of the anchor plate 1 meets the design requirements. Select prestressed steel wire rope and anchor plate 1 of appropriate specifications.

[0044] 2. Install the anchor plate 1. Fix the anchor plate 1 at the predetermined position of the prefabricated panel mold, and ensure that the fixing holes 13 of the anchor plate 1 are aligned with the reserved holes of the mold. Use bolts and fixing holes 13 to firmly install the anchor plate 1 in the mold.

[0045] 3. Insert the wire rope. Insert the prestressed wire rope from the wire rope channel 11 of the anchor plate 1, and gradually insert the wire rope into the wedge-shaped groove 12. Make sure that the wire rope runs through the entire anchor plate 1 until the tail of the wire rope reaches the other end of the mold.

[0046] 4. Preliminary locking. During the insertion of the wire rope, the wedge block 2 maintains the preliminary fixation of the wire rope under the action of the spring 3 to prevent the wire rope from slipping. After the preliminary fixation, the construction personnel check the position and locking of the wire rope to ensure that it meets the design requirements.

[0047] 5. Apply prestress. Use tensioning equipment to apply prestress to the wire rope, and gradually increase the tension according to the design requirements. During the prestressing process, the wedge block 2 is further wedged under the action of prestress to achieve the tightening and locking of the wire rope. After the prestress reaches the design value, stop tensioning and maintain the tension state of the wire rope.

[0048] 6. Pour concrete. Pour concrete while the wire rope is in a prestressed state. Ensure that the concrete evenly fills the mold, especially the area around the anchor plate 1 and the wire rope. After the concrete is poured, vibrate and plaster the surface to ensure the flatness and density of the precast panel surface.

[0049] 7. Demoulding. After the concrete hydration reaches the curing requirements, demoulding operation is carried out. Then the concrete precast slab is cured.

[0050] In the specific use process, the steel wire rope passes through the steel wire rope channel 11 and enters the wedge groove 12. At this time, the steel wire rope pushes the wedge block 2 to overcome the thrust of the spring 3. The two wedge blocks 2 separate to increase the inner diameter of the stop groove 21, and the steel wire rope can be inserted into the stop groove 21. When the steel wire rope is pulled, the spring 3 first pushes the wedge block 2 to move so that the inner diameter of the stop groove 21 decreases. The steel wire rope obtains initial friction between the inner wall of the stop groove 21 and the wedge block 2. This friction drives the wedge block 2 to move toward the narrow end of the wedge groove 12, so that the steel wire rope can be anchored. In the entire use process, the anchoring part is inside the anchor plate 1. Under the premise of achieving self-locking anchoring, at least the phenomenon of the steel wire rope exposed at the anchoring end is improved.

[0051] Embodiment 2:

[0052] Reference Figure 5On the basis of the first embodiment, in the second embodiment, the wedge-shaped groove is arranged in the middle of the anchor plate, and the wide end of the wedge-shaped groove is also connected with a wire rope channel. In this embodiment, the wire rope channel 11 that passes through the wide end of the wedge-shaped groove 12 has a larger inner diameter than the part that passes through the narrow end of the wedge-shaped groove 12, and is used to bend the excessively long part of the wire rope, and there is a corresponding cylindrical plug to seal and form an interference fit. The design of the fully through wire rope channel 11 can facilitate the installation and tensioning of the wire rope. On the basis of the first embodiment, the construction efficiency can be improved, the uniform application of prestress can be ensured, and the difficulty of alignment and adjustment can be avoided.

[0053] When used specifically, the second embodiment can also be used as a tensioning end, with the portion of the wire rope passage 11 that is connected to the wide end of the wedge-shaped groove 12 facing outward and abutting against the front card jack for wire rope tensioning. A joint can also be added to the front end of the jack to extend into the wedge-shaped groove 12 for tensioning, and the spring 3 inside the wedge-shaped groove 12 needs to be removed at this time.

[0054] Embodiment three:

[0055] Reference Figure 6 On the basis of the second embodiment, in the third embodiment, the anchor plate 1 is a two-half structure along the axial direction of the fixing hole 13, and the wedge-shaped groove 12 and the wire rope channel 11 are evenly separated. In the rare case where disassembly and replacement may be required, the two-half structure of the anchor plate 1 provides conditions for disassembly of the entire anchoring device, making the disassembly and replacement process more convenient, and reducing maintenance time and cost.

[0056] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A prestressed steel wire rope tensioning anchoring device, comprising an anchor plate (1), wherein the anchor plate (1) is provided with a steel wire rope passage (11) and a plurality of fixing holes (13), wherein the plurality of fixing holes (13) are used for installing bolts, and wherein: A wedge-shaped groove (12) is provided inside the anchor plate (1), the wire rope passage (11) axially connects the narrow end of the wedge-shaped groove (12) and the outside of the anchor plate (1), and a self-locking mechanism for fixing the wire rope is provided inside the wedge-shaped groove (12).

2. A prestressed steel wire rope tensioning anchoring device according to claim 1, characterized in that: The self-locking mechanism comprises: A wedge block (2), the wedge block (2) being slidably disposed in the wedge groove (12), the wedge block (2) being used to limit the position of the steel wire rope; A spring (3), wherein the spring (3) is arranged inside the wedge-shaped groove (12), and the spring (3) abuts against the wedge-shaped block (2).

3. A prestressed steel wire rope tensioning anchoring device according to claim 2, characterized in that: Each of the wedge-shaped grooves (12) is evenly and symmetrically provided with at least two wedge-shaped blocks (2) along the circumferential direction, and the centers of the at least two wedge-shaped blocks (2) form a stop groove (21), and the steel wire rope passes through the stop groove (21).

4. A prestressed steel wire rope tensioning anchoring device according to claim 3, characterized in that: The surface of the retaining groove (21) is provided with a friction structure.

5. The prestressed steel wire rope tensioning anchoring device according to claim 1, characterized in that: The wedge-shaped groove (12) is arranged in the middle of the anchor plate (1), and the wide end of the wedge-shaped groove (12) is also connected to a wire rope channel (11).

6. A prestressed steel wire rope tensioning anchoring device according to claim 5, characterized in that: The anchor plate (1) is a two-half structure perpendicular to the axial direction of the fixing hole (13), and evenly separates the wedge-shaped groove (12) and the wire rope channel (11).

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