Self-locking anchorage device and application method thereof

Abstract

The invention discloses a self-locking anchorage device which comprises an anchor backing plate, a rear protection cover fixedly connected with the anchor backing plate and an anchorage device body installed in the rear protection cover in a limited mode. The device is characterized in that a locking ring is mounted between the rear protective cover and the anchor backing plate, and a locking block for locking the anchorage device body is slidably mounted in the locking ring; a plurality of supporting pressing strips are mounted on the anchorage device body; a connecting mechanism for the supporting pressing strip to rotate is installed between one end of the supporting pressing strip and the anchorage device body, and an elastic piece which facilitates outward expansion of the supporting pressing strip and can push the locking block to slide to lock the anchorage device body when the cable is pulled is installed between the other end of the supporting pressing strip and the anchorage device body. The supporting pressing strip is pushed by the elastic piece to expand outwards along the hinge, the size of the anchorage device body is increased, the locking block formed by splicing the multiple wedge blocks is pushed by the supporting pressing strip to move upwards during cable pulling, the inner diameter is reduced, limiting and self-locking are conducted on the anchorage device body, and therefore limiting and self-locking of the anchorage device body are facilitated, and the installation efficiency is improved; the construction period is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of anchorages, and in particular to a self-locking anchorage and an application method thereof. Background Art

[0002] Anchors refer to permanent anchoring devices used in prestressed concrete, and are widely used in highway bridges, railway bridges, urban interchanges, urban light rail, high-rise buildings, water conservancy and hydropower dams, and other fields. At present, during the installation of anchors, since components such as anchor pads are directly cast inside the bridge piers using concrete, they need to be cast in sections during construction. After tightening the steel cable for a section, concrete is cast for a section to facilitate the fixing of the steel cable. However, this method increases the construction period. Therefore, a self-locking anchor and its application method are proposed to improve construction efficiency and shorten the construction period. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and to provide a self-locking anchor and its application method In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-locking anchor, comprising an anchor plate, a rear protective cover fixedly connected to the anchor plate, and an anchor body limitedly installed in the rear protective cover; its characteristic is that a locking ring is installed between the rear protective cover and the anchor plate, and a locking block for locking the anchor body is slidably installed in the locking ring; a plurality of supporting strips are installed on the anchor body; a connecting mechanism for allowing the supporting strip to perform rotational movement is installed between one end of the supporting strip and the anchor body, and an elastic member is installed between the other end and the anchor body to facilitate the outward expansion of the supporting strip, and can push the locking block to slide and lock the anchor body when the cable is pulled.

[0004] Preferably, the locking block in the locking ring is assembled from a plurality of wedge blocks.

[0005] Preferably, the locking ring is provided with a tapered through hole adapted to the wedge block.

[0006] Preferably, the supporting strips are evenly installed on the anchor body along the circumference.

[0007] Preferably, the anchor body is also provided with an installation groove for installing the support strip.

[0008] Preferably, the anchor body is any anchoring form that can effectively anchor the prestressed tendons.

[0009] Preferably, the elastic member may be a spring, an elastic sheet or an elastic pad.

[0010] An application method of a self-locking anchor, characterized in that the application method is as follows: First, the supporting strip is pressed inward to compress the elastic part, and then the anchor body with the oil steel cable installed passes through the reserved hole, anchor pad and locking block embedded in the pier in turn to enter the rear protective cover. As the space inside the rear protective cover becomes larger, the supporting strip has no squeezing pressure on it, and the elastic part uses its own elasticity to expand the supporting strip outward, and then pulls the steel cable upward. The steel cable drives the anchor body to move upward, and the outward expanded supporting strip contacts the bottom surface of the locking block. As the steel cable is pulled, the locking block is pushed upward until the locking block is pushed to the top of the locking ring, and the upper end surface of the anchor body contacts the lower end surface of the locking block, thereby limiting the anchor body and the steel cable and self-locking.

[0011] The beneficial effects of the present invention are as follows: by utilizing elastic parts to push the supporting strips to expand outward along the hinges, the volume of the anchor body is increased; when the cable is pulled, the locking block assembled from a plurality of wedge blocks is pushed upward by the supporting strips to reduce the inner diameter and limit the anchor body for self-locking, thereby facilitating the limit self-locking of the anchor body, improving installation efficiency, and shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0013] Figure 2 It is a partial structural schematic diagram of the present invention.

[0014] Figure 3 It is a structural schematic diagram of the anchor body of the present invention.

[0015] Legend: 1. Anchor plate; 2. Locking ring; 201. Rear protective cover; 202. Conical through hole; 3. Anchor body; 301. Supporting strip; 302. Connecting mechanism; 303. Elastic member; 304. Anchor hole; 305. Mounting groove; 4. Locking block; 401. Wedge block. DETAILED DESCRIPTION

[0016] Next, we combine the attached Figure 1-3 The self-locking anchor and its application method described in the present invention are further explained.

[0017] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0018] Participate in the Figure 1-3As shown, a self-locking anchor in this embodiment comprises an anchor pad 1, a rear protective cover 201 fixedly connected to the anchor pad 1, and an anchor body 3 limitedly installed in the rear protective cover 201; it is characterized in that a locking ring 2 is installed between the rear protective cover 201 and the anchor pad 1, and a locking block 4 for locking the anchor body 3 can be slidably installed in the locking ring 2; a limiting platform for limiting the locking block 4 is also provided at the bottom of the locking ring 2; a plurality of supporting strips 301 are installed on the anchor body 3; a connecting mechanism 302 for allowing the supporting strip 301 to perform rotational movement is installed between one end of the supporting strip 301 and the anchor body 3, and a connecting mechanism 302 for facilitating the supporting strip 301 to perform rotational movement is installed between the other end and the anchor body 3 01 expands outward, and when the cable is pulled, the locking block 4 can be pushed to slide and lock the elastic member 303 of the anchor body 3; the elastic member 303 and the anchor body 3 and the supporting strip 301 can be fixed by screws or strong glue; the elastic member 303 can be selected from one of a spring, an elastic sheet or an elastic pad; by utilizing the elastic member 303 to push the supporting strip 301 to expand outward along the connecting mechanism 302, the volume of the anchor body 3 is increased, and when the cable is pulled, the locking block 4 assembled by a plurality of wedge blocks 401 is pushed upward through the supporting strip 301 to reduce the inner diameter and limit the anchor body 3 for self-locking, thereby facilitating the limit self-locking of the anchor body 3, improving the installation efficiency and shortening the construction period.

[0019] Participate in the Figure 1-2 As shown, the locking block 4 in the locking ring 2 is assembled with a plurality of wedge blocks 401; the locking ring 2 is provided with a conical through hole 202 adapted to the wedge block 401; by sliding the wedge block 401 along the conical through hole 202 in the locking ring 2, the inner diameter size formed by the assembly between the wedge blocks 401 can be changed, thereby facilitating the passage and self-locking of the anchor body 3.

[0020] Participate in the Figure 1 , 3 As shown, the support strips 301 are evenly installed on the anchor body 3 along the circumference; the anchor body 3 is also provided with a mounting groove 305 for mounting the support strips 301; the anchor body 3 is any anchoring form that can effectively anchor the prestressed tendons.

[0021] During the installation process of the present invention, the supporting pressure strip 301 is first pressed inward to compress the elastic member 303, thereby reducing the overall volume of the anchor body 3, and facilitating the installation of the anchor body 3. Then, the anchor body 3 with the installed steel cable passes through the reserved hole pre-buried in the pier, the anchor pad 1 and the locking block 4 in sequence to enter the rear protective cover 201. Since the wedge block 401 is at the lowermost end of the locking ring 2, the inner diameter formed by the assembly between the wedge blocks 401 is larger than the outer diameter of the overall anchor body 3. Therefore, the anchor body 3 can directly pass through the inner diameter circle formed by the assembly between the wedge blocks 401 to enter the rear protective cover 201. As the space inside the rear protective cover 201 becomes larger, the support strip 301 is no longer squeezed by it, and the elastic member 303 uses its own elasticity to expand the support strip 301 outward, thereby increasing the overall volume of the anchor body 3, and then pulls the steel cable upward, which drives the anchor body 3 to move upward, and the outward-expanded support strip 301 contacts the bottom surface of the wedge block 401. As the steel cable is pulled, the wedge block 401 is pushed upward until it is pushed to the top of the locking ring 2. At this time, the inner diameter assembled between the wedge blocks 401 is the same as the inner diameter on the anchor body 3, and the upper end surface of the anchor body 3 contacts the lower end surface of the wedge block 401, thereby limiting the position of the anchor body 3 and the steel cable and self-locking.

[0022] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A self-locking anchor, comprising an anchor plate (1), a rear protective cover (201) fixedly connected to the anchor plate (1), and an anchor body (3) limitedly mounted in the rear protective cover (201); wherein: A locking ring (2) is installed between the rear protective cover (201) and the anchor pad (1), and a locking block (4) for locking the anchor body (3) is slidably installed in the locking ring (2); a plurality of supporting strips (301) are installed on the anchor body (3); a connecting mechanism (302) for allowing the supporting strip (301) to perform rotational movement is installed between one end of the supporting strip (301) and the anchor body (3), and an elastic member (303) is installed between the other end and the anchor body (3) to facilitate the supporting strip (301) to expand outwards and to push the locking block (4) to slide and lock the anchor body (3) when the cable is pulled.

2. A self-locking anchor according to claim 1, characterized in that: The locking block (4) in the locking ring (2) is assembled from a plurality of wedge blocks (401).

3. A self-locking anchor according to claim 2, characterized in that: The lock ring (2) is provided with a tapered through hole (202) adapted to the wedge block (401).

4. A self-locking anchor according to claim 1, characterized in that: The supporting pressure strips (301) are evenly installed on the anchor body (3) along the circumference.

5. A self-locking anchor according to claim 4, characterized in that: The anchor body (3) is also provided with a mounting groove (305) for mounting the supporting pressure strip (301).

6. A self-locking anchor according to claim 5, characterized in that: The anchor body (3) is any anchoring form that can effectively anchor the prestressed tendons.

7. A self-locking anchor according to claim 1, characterized in that: The elastic member (303) may be a spring, an elastic sheet or an elastic pad.

8. The method for applying a self-locking anchor according to any one of claims 1 to 7, characterized in that: The application method is as follows: First, the supporting strip is pressed inward to compress the elastic part, and then the anchor body with the oil steel cable installed passes through the reserved hole, anchor pad and locking block embedded in the pier in turn to enter the rear protective cover. As the space inside the rear protective cover becomes larger, the supporting strip has no squeezing pressure on it, and the elastic part uses its own elasticity to expand the supporting strip outward, and then pulls the steel cable upward. The steel cable drives the anchor body to move upward, and the outward expanded supporting strip contacts the bottom surface of the locking block. As the steel cable is pulled, the locking block is pushed upward until the locking block is pushed to the top of the locking ring, and the upper end surface of the anchor body contacts the lower end surface of the locking block, thereby limiting the anchor body and the steel cable and self-locking.

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