Anchor withdrawing structure of prestressed tool anchor

Abstract

The utility model belongs to the technical field of construction, and discloses an anchor withdrawing structure of a pre-stressed tool anchor, which comprises a tool anchor plate, a plurality of conical cavities are arranged in the tool anchor plate, tool clamping pieces attached to the conical cavities are mounted in the conical cavities, the tool clamping pieces are hollow conical bodies enclosed by split conical pieces, and the conical pieces are arranged in the conical cavities. A steel strand passes through the hollow conical body along the axis of the hollow conical body; and a conical anchor withdrawing guide sleeve is arranged between the outer wall of the tool clamping piece and the tool anchor plate. By using the anchor withdrawing structure of the prestressed tool anchor, putty impurities are not easy to accumulate in the conical cavity of the tool anchor plate, the tool anchor plate is clean and tidy, and the conical cavity and the outer surface of the clamping piece do not need to be repeatedly scrubbed.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, and more specifically to an anchor withdrawal structure of a prestressed tool anchor. Background Art

[0002] In the construction of prestressed anchors, after tensioning is completed, it is difficult for the tool clip to be withdrawn from the tool anchor plate hole. Construction workers will use the method of hammering the tool anchor plate to withdraw the anchor, but there may still be a situation where the anchor cannot be withdrawn; there is a great safety risk in withdrawing the anchor by using the front card jack. The current method to solve the problem of withdrawing the tool anchor is to apply lubricant inside the anchor plate hole and on the outer surface of the clip. In the construction of prestressed anchors, the tool clip often gets stuck in the cone hole of the anchor plate, making it very difficult to withdraw the anchor, or a plastic film is wrapped on the surface of the clip.

[0003] Current solutions and existing problems: Apply wax or grease lubricants to the tapered hole of the anchor plate and the outer surface of the clip; when the application is uneven, the ambient temperature is high or low, dust and impurities are mixed in the lubricant, affecting the withdrawal of the anchor.

[0004] Before construction, plastic film is wrapped on the surface of the clip, which is inconvenient to operate and cannot be reused; it is uneven when inserted into the tapered hole of the anchor plate, affecting the withdrawal of the anchor.

[0005] After searching CN202021130152, a prestressed tool anchor de-anchoring structure is disclosed, which is connected to the jack for prestressed tensioning, including a tool anchor plate, a tool clip, a gasket and a latch. The gasket is fixed to the piston of the jack, and a connecting hole is provided on the gasket; the latch is connected to the connecting hole; a concave slot is provided around the circumference of the tool anchor plate; the latch passes through the corresponding connecting hole and can be inserted into the slot. The tool anchor is limited by the latch, so that the tool anchor and the jack can be regarded as an integrated structure during the retraction of the jack's piston. During the retraction process, the tool anchor and the tool clip form relative movement, and then the tool clip falls off the tool anchor, and then the tool anchor is removed from the steel strand to complete the de-anchoring. In actual use, after the steel strand passes through the anchor plate, it is difficult to align the tool anchor groove and the gasket hole due to position differences, and the operating efficiency needs to be improved.

[0006] Therefore, providing a method that is convenient for construction operation, saves time and effort, is low in cost, and has a good use effect of the anchor withdrawal structure has great practical significance and great economic value. Utility Model Content

[0007] In view of the deficiencies of the above-mentioned prior art, the utility model provides an anchor withdrawal structure for a prestressed tool anchor. The structure of a tool clip, a tool anchor plate and a conical anchor withdrawal guide sleeve are designed in a coordinated manner. The conical anchor withdrawal guide sleeve is set as a hollow cone, which is convenient for inserting the tool clip and inserting it into the conical hole of the tool anchor plate during construction. This structure is convenient for construction, easy to operate, saves trouble and labor, has low cost and good effect.

[0008] The utility model is realized through the following technical solutions:

[0009] Disclosed is an anchor withdrawal structure for a prestressed tool anchor, comprising a tool anchor plate, wherein a plurality of conical cavities are arranged inside the tool anchor plate, wherein tool clips fitted with the conical cavities are installed in the conical cavities, wherein the tool clips are hollow cones surrounded by petal-type conical pieces, and are used for a steel strand to pass through along the axis of the hollow cone; a conical anchor withdrawal guide sleeve is arranged between the outer wall of the tool clip and the tool anchor plate, wherein the conical anchor withdrawal guide sleeve is a hollow cone, and the taper of the hollow cone is consistent with the taper of the conical cavity.

[0010] The anchor withdrawal structure of the prestressed tool anchor of the utility model is designed according to the structural characteristics of the tool anchor plate, and the conical anchor withdrawal guide sleeve and the conical cavity are used between the outer wall of the tool clip and the tool anchor plate. It is convenient to operate during construction, and the conical anchor withdrawal guide sleeve has a small friction coefficient when in direct contact with the wall of the anchor plate hole, and has small resistance during the tensioning process, which is conducive to the follow-up and anchor withdrawal of the tool clip, and is also conducive to multiple anchoring of the tool anchor. It has been verified through experiments that the anchor withdrawal effect is very good. Furthermore, the conical anchor withdrawal guide sleeve is made of polyethylene film material. The polyethylene film material has a small friction coefficient when in direct contact with the wall of the anchor plate hole, and has small resistance during the tensioning process, which is conducive to the follow-up and anchor withdrawal of the tool clip.

[0011] Furthermore, the tapering of the tapered anchor removal guide sleeve is 10°-20°.

[0012] Furthermore, the conical anchor withdrawal guide sleeve comprises a wide-mouth end face 1 and a narrow-mouth end face 1, and the diameter ratio of the wide-mouth end face 1 to the narrow-mouth end face 1 is 1.5-2:1.

[0013] Furthermore, the tool anchor plate is a cylinder, and the conical cavities are distributed in an annular direction along the center of the cylinder; the center of a circle formed by the central axes of the plurality of conical cavities coincides with the center of the cylinder.

[0014] Furthermore, a trumpet-shaped guide opening is provided at the opening end of the conical cavity.

[0015] Furthermore, the tool clamp is of a two-petal type, the inner wall of the tool clamp is semicircular, and the outer wall of the tool clamp is a cone that tightens from the second wide end face to the second narrow end face.

[0016] Furthermore, the second wide end surface of the tool clamp is exposed outside the conical cavity.

[0017] Furthermore, the tapered anchor withdrawal guide sleeve is placed in its entirety in the tapered cavity, and the size of its outer tapered surface is smaller than the length of the tapered cavity.

[0018] Furthermore, the tool clip has the same taper and length as the tapered anchor withdrawal guide sleeve. The tapered anchor withdrawal guide sleeve has a thickness of 0.1 mm and is the same size as the tool clip; it is easy to use, does not waste materials, is low in cost, and is easy to manufacture.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The anchor withdrawal structure of this prestressed tool anchor is designed according to the structural characteristics of the tool anchor plate. The conical anchor withdrawal guide sleeve and the conical cavity are used between the outer wall of the tool clip and the tool anchor plate. It is convenient to operate during construction. The conical anchor withdrawal guide sleeve has a small friction coefficient when in direct contact with the wall of the anchor plate hole, and the resistance is small during the tensioning process, which is conducive to the follow-up and anchor withdrawal of the tool clip, and is also conducive to the multiple anchoring of the tool anchor. The test proves that the anchor withdrawal effect is very good.

[0021] In addition, the conical anchor withdrawal guide sleeve is easy to produce in batches, and the materials used are easy to obtain and the cost is low.

[0022] By using the anchor withdrawal structure of the prestressed tool anchor, putty impurities are not easily accumulated in the conical cavity of the tool anchor plate, and the tool anchor plate is clean and tidy, and there is no need to repeatedly scrub the conical cavity and the outer surface of the clip.

[0023] In addition, after the anchor is withdrawn, the conical anchor withdrawal guide sleeve is easy to remove and can be used repeatedly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the anchor withdrawal structure of the prestressed tool anchor described in the utility model.

[0025] Figure 2 It is a schematic diagram of the AA cross-sectional structure of the anchor withdrawal structure of the prestressed tool anchor described in the utility model.

[0026] Among them, 1-steel strand, 2-tool clip, 21-wide end face two, 22-narrow end face two, 3-tool anchor plate, 31-conical cavity, 32-trumpet-shaped guide mouth, 4-conical anchor withdrawal guide sleeve, 41-wide end face one, 42-narrow end face one. DETAILED DESCRIPTION

[0027] In order to facilitate the description and understanding of the present invention, the following Figure 1-Figure 2 The embodiments of the present utility model are described in detail. Example 1

[0028] The anchor withdrawal structure of the prestressed tool anchor of this embodiment is to solve the problem that the tool clip is often stuck in the cone hole of the anchor plate during the construction of the prestressed anchor, making anchor withdrawal very difficult. There is no need to apply wax or grease lubricants on the cone hole of the anchor plate and the outer surface of the clip; it fundamentally avoids the problem of uneven application, when the ambient temperature is high or low, and when dust and dirt impurities are mixed in the lubricant, affecting anchor withdrawal.

[0029] The anchor withdrawal structure of the prestressed tool anchor includes a tool anchor plate 3. The tool anchor plate 3 of the present embodiment is provided with a plurality of conical cavities 31 distributed from the center to the outside. The conical cavities 31 in the present embodiment are distributed in an annular direction along the center of the cylinder; the center of a circle formed by the central axes of the plurality of conical cavities 31 coincides with the center of the cylinder.

[0030] A tool clamp 2 that fits the conical cavity 31 is installed in the conical cavity 31. The tool clamp 2 is a hollow cone surrounded by split-flange conical pieces, and is used for the steel strand 1 to pass through along the axis of the hollow cone; that is, a plurality of split-flange conical pieces surround a cylindrical channel to facilitate the placement and fixation of the steel strand 1. A conical anchor withdrawal guide sleeve 4 is provided between the outer wall of the tool clamp 2 and the tool anchor plate 3 in this embodiment. The conical anchor withdrawal guide sleeve 4 is a hollow cone, and the taper of the hollow cone is consistent with the taper of the conical cavity 31.

[0031] The tool clamp 2 in this embodiment is a two-petal type, including a wide end face 21 and a narrow end face 22 respectively disposed at both ends; the inner wall of the tool clamp 2 is semicircular, and the outer wall of the tool clamp 2 is a cone that tightens from the wide end face 21 to the narrow end face 22. The wide end face 22 of the tool clamp 2 is exposed outside the conical cavity 31.

[0032] The conical anchor withdrawal guide sleeve 4 is made of polyethylene film material. The polyethylene film material has a small friction coefficient when in direct contact with the anchor plate hole wall, and has a small resistance during the tensioning process, which is conducive to the follow-up and anchor withdrawal of the tool clip. The conical anchor withdrawal guide sleeve 4, the tool clip 2 and the conical cavity 31 in the utility model are all of the same taper, preferably 10°-20°, and 15° in this embodiment.

[0033] The conical anchor withdrawal guide sleeve 4 comprises a wide end face 41 and a narrow end face 42, wherein the diameter ratio of the wide end face 1 to the narrow end face 1 is 1.5-2: 1. The thickness of the conical anchor withdrawal guide sleeve 4 is 0.1 mm, and the friction coefficient between the conical anchor withdrawal guide sleeve and the anchor plate hole wall is small, and the resistance is small during the tensioning process.

[0034] For the convenience of use, the conical anchor withdrawal guide sleeve 4 is placed in the conical cavity 31 as a whole, and the outer conical surface size is smaller than the length of the conical cavity 31. The tool clip 2 and the conical anchor withdrawal guide sleeve 4 have the same taper and length size.

[0035] The anchor withdrawal structure of the prestressed tool anchor of the utility model is designed according to the structural characteristics of the tool anchor plate, and the conical anchor withdrawal guide sleeve and the conical cavity are used between the outer wall of the tool clip and the tool anchor plate. It is convenient to operate during construction, and the friction coefficient between the conical anchor withdrawal guide sleeve and the anchor plate hole wall is small, and the resistance is small during the tensioning process, which is conducive to the follow-up and anchor withdrawal of the tool clip, and is also conducive to multiple anchoring of the tool anchor. The test proves that the anchor withdrawal effect is very good. The above is only a preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of the utility model.

Claims

1. An anchor withdrawal structure for a prestressed tool anchor, characterized in that: The invention comprises a tool anchor plate (3), wherein a plurality of conical cavities (31) are arranged inside the tool anchor plate (3), wherein a tool clamp (2) which is in contact with the conical cavity (31) is installed inside the conical cavity (31), wherein the tool clamp (2) is a hollow cone formed by a split-flange conical plate, and is used for the steel strand (1) to pass through along the axis of the hollow cone; a conical anchor withdrawal guide sleeve (4) is arranged between the outer wall of the tool clamp (2) and the tool anchor plate (3), wherein the conical anchor withdrawal guide sleeve (4) is a hollow cone, and the taper of the hollow cone is consistent with the taper of the conical cavity (31).

2. The anchor withdrawal structure of the prestressed tool anchor according to claim 1, characterized in that: The conical anchor withdrawal guide sleeve (4) is made of polyethylene film material.

3. The anchor withdrawal structure of the prestressed tool anchor according to claim 2, characterized in that: The tapered anchor withdrawal guide sleeve (4) has a taper of 10°-20°.

4. The anchor withdrawal structure of the prestressed tool anchor according to claim 3 is characterized in that: The conical anchor withdrawal guide sleeve (4) comprises a wide end face 1 (41) and a narrow end face 1 (42), and the diameter ratio of the wide end face 1 to the narrow end face 1 is 1.5-2:

1.

5. The anchor withdrawal structure of the prestressed tool anchor according to claim 4, characterized in that: The tool anchor plate (3) is a cylinder, and the conical cavities (31) are distributed in an annular direction along the center of the cylinder; the center of a circle formed by the central axes of the plurality of conical cavities (31) coincides with the center of the cylinder.

6. The anchor withdrawal structure of the prestressed tool anchor according to claim 5, characterized in that: The open end of the conical cavity (31) is provided with a trumpet-shaped guide opening (32).

7. The anchor withdrawal structure of the prestressed tool anchor according to claim 1, characterized in that: The tool clamp (2) is of a two-petal type, comprising a wide-mouth end face (21) and a narrow-mouth end face (22) respectively arranged at two ends; the inner wall of the tool clamp (2) is semicircular, and the outer wall of the tool clamp (2) is conical, which is tightened from the wide-mouth end face (21) to the narrow-mouth end face (22).

8. The anchor withdrawal structure of the prestressed tool anchor according to claim 7, characterized in that: The second wide end surface (21) of the tool clamp (2) is exposed outside the conical cavity (31).

9. The anchor withdrawal structure of the prestressed tool anchor according to any one of claims 1 to 8, characterized in that: The conical anchor withdrawal guide sleeve (4) is placed as a whole in the conical cavity (31), and the size of its outer conical surface is smaller than the length of the conical cavity (31).

10. The anchor withdrawal structure of the prestressed tool anchor according to claim 9, characterized in that: The tool clamp (2) and the tapered anchor removal guide sleeve (4) have the same taper and length dimensions.

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