Prestressed anchorage device easy to withdraw

Abstract

The utility model discloses a pre-stressed anchorage device easy to withdraw, which comprises an anchorage device body, the anchorage device body is composed of four splicing pieces, two right-angle surfaces of each splicing piece are respectively provided with incomplete grooves, the outer surface of the anchorage device body is sleeved with a fixed sleeve, the inner wall of the fixed sleeve is provided with internal threads, and the inner threads are connected with the splicing pieces. Internal threads are arranged on the outer surface of the anchorage device body, external threads are arranged on the outer surface of the anchorage device body, the fixing sleeve is connected with the anchorage device body through matching of the internal threads and the external threads, and a limiting mechanism is further arranged between the fixing sleeve and the anchorage device body. The anchor hole in the anchorage device body is detachable, and when an anchor cable needs to be withdrawn, only the anchorage device body needs to be detached into the splicing piece, the anchor hole is detached, and the anchor withdrawing work can be rapidly completed.

Description

Technical Field

[0001] The utility model relates to the technical field of anchors, in particular to a prestressed anchor that is easy to unanchor. Background Art

[0002] Anchor refers to the permanent anchoring device used in prestressed concrete. It is an anchoring tool used in post-tensioned structures or components to maintain the tension of prestressed tendons and transfer it to the concrete. It is also called a prestressed anchor.

[0003] After the anchor is used, it needs to be unanchored, that is, the anchor needs to be removed from the anchor cable. When unanchoring, additional auxiliary equipment such as a jack is needed to perform the unanchoring operation, which is relatively cumbersome. Therefore, a prestressed anchor that is easy to unanchor is proposed. Utility Model Content

[0004] The purpose of the present invention is to provide a prestressed anchor that is easy to unanchor, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a prestressed anchor that is easy to unanchor, comprising an anchor body, the anchor body being composed of four splicing parts, the two right-angled surfaces of the splicing parts being respectively provided with incomplete grooves, the outer surface of the anchor body being sleeved with a fixing sleeve, the inner wall of the fixing sleeve being provided with an internal thread, the outer surface of the anchor body being provided with an external thread, the fixing sleeve and the anchor body being connected by the cooperation of the internal thread and the external thread, and a limiting mechanism being further provided between the fixing sleeve and the anchor body.

[0006] As a further preferred embodiment of the present technical solution, the cross section of the splicing piece is a right-angled fan-shaped structure.

[0007] As a further preferred embodiment of the present technical solution, the incomplete grooves between two adjacent splicing pieces are spliced ​​to form an anchor hole, and the cross section of the anchor hole is a truncated cone structure.

[0008] As a further preferred embodiment of the present technical solution, a clip is provided in the anchor hole, and a through hole for acting on the anchor cable is opened at the axial center position of the clip.

[0009] As a further preferred embodiment of the present technical solution, the limiting mechanism includes a limiting bolt, matching holes are respectively provided on the arc-shaped surfaces of the four splicing parts, a limiting hole is provided on the fixed sleeve at the extended position of the matching hole, a limiting bolt is arranged in the limiting hole, and the limiting bolt and the matching hole are connected by threaded fitting.

[0010] As a further preferred embodiment of the present technical solution, four clamping blocks are fixedly mounted on one right-angled surface of the splicing piece, and four clamping slots are provided on another right-angled surface of the splicing piece, and the clamping blocks and the clamping slots are adapted to each other.

[0011] As a further preferred embodiment of the present technical solution, the anchor body and the fixing sleeve are both made of high-quality carbon structural steel.

[0012] The utility model provides a prestressed anchor that is easy to unanchor, which has the following beneficial effects:

[0013] The utility model adopts a unique structural design, in which the anchor body is spliced ​​together by four splicing parts, so that the anchor hole on the anchor body is detachable. When the anchor cable needs to be withdrawn, the anchor body only needs to be disassembled into the splicing parts and the anchor hole is separated, and the anchor withdrawal work can be completed quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the disassembly of the overall structure of the utility model;

[0016] Figure 3 This is a schematic diagram of a further breakdown of the overall structure of the utility model;

[0017] Figure 4 It is a structural diagram of the splicing piece in the utility model;

[0018] In the figure: 1. Anchor body; 2. Fixing sleeve; 3. Clip; 4. Splicing piece; 5. Incomplete groove; 6. Limit hole; 7. Matching hole; 8. Limit bolt; 9. Internal thread; 10. External thread; 11. Block; 11. Slot; 13. Anchor hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figures 1 to 4 As shown, in this embodiment, a prestressed anchor that is easy to unanchor includes an anchor body 1, which is composed of four splicing parts 4. The cross-section of the splicing part 4 is a right-angled fan-shaped structure, and two right-angled surfaces of the splicing part 4 are respectively provided with incomplete grooves 5. The outer surface of the anchor body 1 is provided with a fixing sleeve 2, and the inner wall of the fixing sleeve 2 is provided with an internal thread 9. The outer surface of the anchor body 1 is provided with an external thread 10. The fixing sleeve 2 and the anchor body 1 are connected by the cooperation of the internal thread 9 and the external thread 10. A limiting mechanism is also provided between the fixing sleeve 2 and the anchor body 1.

[0021] The incomplete grooves 5 between two adjacent splicing pieces 4 are spliced ​​to form an anchor hole 13 , and the cross section of the anchor hole 13 is a truncated cone structure.

[0022] Such arrangement enables the anchor hole 13 to be spliced ​​and formed, and when withdrawing the anchor cable, the anchor hole 13 can be disassembled to achieve rapid withdrawal.

[0023] A clip 3 is provided in the anchor hole 13 , and a through hole for acting on the anchor cable is opened at the axial center of the clip 3 .

[0024] Among them, the limiting mechanism includes a limiting bolt 8, and matching holes 7 are respectively opened on the arc-shaped surfaces of the four splicing parts 4. A limiting hole 6 is opened on the fixed sleeve 2 at the extended position of the matching hole 7. A limiting bolt 8 is arranged in the limiting hole 6, and the limiting bolt 8 and the matching hole 7 are connected by threaded fitting.

[0025] The limiting bolts 8 , the limiting holes 6 and the matching holes 7 can limit the position between the fixing sleeve 2 and the anchor body 1 , thereby preventing the fixing sleeve 2 from falling off the anchor body 1 .

[0026] Among them, four clamping blocks 11 are fixedly installed on one right-angled surface of the splicing piece 4, and four clamping slots 12 are opened on the other right-angled surface of the splicing piece 4. The clamping blocks 11 and the clamping slots 12 are adapted to each other.

[0027] By setting the block 11 and the slot 12, when the four splicing pieces 4 are spliced ​​together to form the anchor body 1, the block 11 on one splicing piece 4 will be embedded in the slot 12 on the adjacent splicing piece 4, thereby positioning the four splicing pieces 4 and ensuring that the external thread 10 on the outer surface of the anchor body 1 will not be skewed.

[0028] The anchor body 1 and the fixing sleeve 2 are both made of high-quality carbon structural steel. This configuration can ensure that the anchor body 1 and the fixing sleeve 2 will not be deformed during use.

[0029] The utility model provides a prestressed anchor that is easy to withdraw. The specific working principle is as follows:

[0030] When in use, the four splicing pieces 4 are spliced ​​into an anchor body 1, and the incomplete groove 5 between the two adjacent splicing pieces 4 will form an anchor hole 13. The card block 11 on one splicing piece 4 will be embedded in the card groove 12 on the adjacent splicing piece 4, thereby positioning the four splicing pieces 4, ensuring that the external thread 10 on the outer surface of the anchor body 1 will not be skewed. Then the fixing sleeve 2 is rotated and sleeved on the outer surface of the anchor body 1 until the limiting hole 6 on the fixing sleeve 2 is aligned with the matching hole 7 on the anchor body 1, thereby fixing the anchor body 1, and then the limiting bolt 8 is rotated and inserted into the limiting hole 6 and the matching hole 7 in turn, thereby limiting the fixing sleeve 2 and preventing the fixing sleeve 2 from falling off the anchor body 1. When the anchor cable needs to be withdrawn, it is only necessary to disassemble the anchor body 1 into the splicing pieces 4 and separate the anchor holes 13 to quickly complete the anchor withdrawal work.

[0031] 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 prestressed anchorage that is easy to unanchor, comprising an anchorage body (1), characterized in that: The anchor body (1) is composed of four splicing pieces (4), and two right-angled surfaces of the splicing pieces (4) are respectively provided with incomplete grooves (5). The outer surface of the anchor body (1) is provided with a fixing sleeve (2), and the inner wall of the fixing sleeve (2) is provided with an internal thread (9). The outer surface of the anchor body (1) is provided with an external thread (10). The fixing sleeve (2) and the anchor body (1) are connected by the cooperation of the internal thread (9) and the external thread (10), and a limiting mechanism is also provided between the fixing sleeve (2) and the anchor body (1).

2. The prestressed anchorage that is easy to unanchor according to claim 1, characterized in that: The cross section of the splicing piece (4) is a right-angled fan-shaped structure.

3. The prestressed anchorage that is easy to unanchor according to claim 1, characterized in that: The incomplete grooves (5) between two adjacent splicing pieces (4) are spliced ​​to form an anchor hole (13), and the cross section of the anchor hole (13) is a truncated cone structure.

4. The prestressed anchorage that is easy to unanchor according to claim 3, characterized in that: A clip (3) is provided in the anchor hole (13), and a through hole for acting on the anchor cable is opened at the axial center position of the clip (3).

5. The prestressed anchorage that is easy to unanchor according to claim 1, characterized in that: The limiting mechanism includes a limiting bolt (8), matching holes (7) are respectively provided on the arc-shaped surfaces of the four splicing parts (4), a limiting hole (6) is provided on the fixing sleeve (2) at an extended position of the matching hole (7), a limiting bolt (8) is provided in the limiting hole (6), and the limiting bolt (8) and the matching hole (7) are connected by threaded engagement.

6. The prestressed anchorage that is easy to unanchor according to claim 1, characterized in that: Four clamping blocks (11) are fixedly mounted on one right-angled surface of the splicing piece (4), and four clamping slots (12) are provided on another right-angled surface of the splicing piece (4), wherein the clamping blocks (11) and the clamping slots (12) are adapted to each other.

7. The prestressed anchorage that is easy to unanchor according to claim 1, characterized in that: The anchor body (1) and the fixing sleeve (2) are both made of high-quality carbon structural steel.

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