A composite anchor

Abstract

The utility model discloses a composite anchor, belongs to the anchoring technical field, solves the problem that the existing high-strength concrete needs smaller reserved hole anchor. It includes anchor plate, clamping piece and extrusion sleeve, the anchor plate on be equipped with the hole that is consistent with the number of steel strand, the hole includes the tapered hole and through -hole, and the tapered hole of each near the side of end face all is equipped with the groove. The utility model discloses a composite anchor, can stagger clamping piece in depth, realizes greater density hole arrangement, effectively reduces the diameter of anchor plate, solves the problem that the high-strength concrete needs smaller reserved hole anchor.

Description

Technical Field

[0001] This utility model relates to the field of anchoring technology, and more specifically, to a composite anchor. Background Technology

[0002] In the current field of prestressed engineering technology, especially in wind power prestressed concrete structures, most prestressed concrete structures use wedge-type anchors to anchor the steel strands. However, the wedge-type anchors currently used are limited by the outer diameter of the wedges and the distance from the outer edge of the outermost conical hole of the stress-preventing anchor plate to the edge of the anchor plate. This means the anchor plate diameter cannot be designed too small, especially when an integral strand-threading construction process is required. This makes it impossible to meet the need for smaller reserved ducts in wind power prestressed concrete structures.

[0003] Therefore, there is an urgent need to design a composite anchor to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art. The purpose of this utility model is to provide a composite anchor that can stagger the wedges in depth to achieve a higher density of holes, effectively reduce the diameter of the anchor plate, and solve the problem of high-strength concrete requiring anchors with smaller reserved holes.

[0005] To achieve the above objectives, this utility model provides a composite anchor, including an anchor plate, a clamping plate, and a compression sleeve. The anchor plate is provided with channels corresponding to the number of steel strands. The channels include tapered holes and through holes. Each tapered hole has a groove on the side near the end face.

[0006] As a further improvement, the outer wall of the anchor plate is provided with external threads, and a nut is screwed onto the anchor plate through the external threads.

[0007] Furthermore, the conical holes and through holes are arranged in layers from the inside to the outside along the radial direction of the anchor plate.

[0008] Furthermore, the tapered holes and through holes are evenly distributed along the axis of the anchor plate.

[0009] Furthermore, each of the aforementioned through holes extends radially along the anchor plate to the outer wall of the anchor plate to form a U-shaped groove.

[0010] Furthermore, the tapered holes and through holes are arranged symmetrically at intervals.

[0011] Beneficial effects

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] This utility model's composite anchor uses a combination structure of clamping plates and extrusion sleeves. The clamping plates can be staggered in depth to reduce the hole spacing on the anchor plate, achieving a higher density of hole arrangement, effectively reducing the diameter of the anchor plate, meeting the requirements for smaller reserved channels, solving the problem of anchors with smaller reserved channels required for high-strength concrete, and also enabling overall threading, thus improving construction efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure during anchoring in Embodiment 1 of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of this utility model when applied in engineering.

[0018] Figure 5 This is a cross-sectional structural diagram of Embodiment 2 of the present invention;

[0019] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this utility model when applied in engineering.

[0020] Figure 7 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0021] Figure 8 This is a schematic diagram of the structure during anchoring in Embodiment 3 of this utility model;

[0022] Figure 9 This is a structural schematic diagram of Embodiment 4 of the present invention.

[0023] Among them: 1-anchor plate, 2-clamping plate, 3-extrusion sleeve, 4-steel strand, 5-tapered hole, 6-through hole, 7-sinkhole, 8-external thread, 9-nut. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0025] Example 1

[0026] See Figure 1-4This is a specific embodiment of the present invention. A composite anchor is applied to the fixed end of a steel strand. It includes an anchor plate 1, a clamping piece 2, and a compression sleeve 3. The anchor plate 1 has a number of channels corresponding to the number of steel strands 4 for threading the steel strands 4. The channels include conical holes 5 and through holes 6. That is, there are conical holes 5 and through holes 6 in the multiple channels. The conical holes 5 cooperate with the clamping pieces 2 to form a clamping anchor, and the through holes 6 cooperate with the compression sleeve 3 to form a compression anchor. Each conical hole 5 has a groove 7 on the side near the end face to ensure that the clamping pieces 2 do not protrude from the end face of the anchor plate 1, thereby affecting the installation of the compression sleeve 3 and ensuring that the compression sleeve 3 can have good contact with the end face of the anchor plate 1.

[0027] Preferably, the conical holes 5 and through holes 6 are arranged in layers from the inside to the outside along the radial direction of the anchor plate 1, and the conical holes 5 and through holes 6 are evenly distributed along the axis of the anchor plate 1. The positions of the conical holes 5 and through holes 6 are reasonably optimized so that the anchor plate 1 is subjected to more uniform force.

[0028] The composite anchorage in this embodiment, during construction:

[0029] (1) Pass the steel strand 4 through the multiple holes corresponding to the anchor plate 1, and install the clamp 2 in the conical hole 5 to initially fix the position of the steel strand;

[0030] (2) Install extrusion sleeves 3 on the steel strands 4 corresponding to the through holes 6. Use a special extrusion tool to tightly wrap the extrusion sleeves 3 around the steel strands 4 to form a strong connection point.

[0031] (3) Pass the anchor and steel strand through the hole as a whole, and fix them with Haver washers or nuts;

[0032] (4) Tensioning is performed at the tensioning end. The clamping plate 2 anchors the steel strand 4 in the conical hole 5 of the anchor plate 1, while the extrusion sleeve 3 is attached to the end face of the anchor plate 1.

[0033] The following table compares the diameters of ideally designed wedge-type compression sleeve anchors with those of ordinary wedge anchors in the same hole position:

[0034]

[0035]

[0036] As can be seen, the composite anchor in this embodiment uses a combination structure of clamp 2 and extrusion sleeve 3, which can stagger the clamps in depth, reduce the hole spacing on the anchor plate 1, achieve a higher density hole arrangement, effectively reduce the diameter of the anchor plate, meet the requirement of smaller reserved channels, solve the problem of anchors with smaller reserved channels for high-strength concrete, and at the same time achieve overall threading, improving construction efficiency.

[0037] Example 2

[0038] See Figure 5-6 This is another specific embodiment of the present utility model. This embodiment is basically the same as embodiment 1, except that an external thread 8 is provided on the outer wall of the anchor plate 1, and a nut 9 is screwed onto the anchor plate 1 through the external thread 8.

[0039] In this embodiment, the design allows the clip 2 and the compression sleeve 3 to be pre-installed on the anchor plate 1 during construction. Then, the anchor plate 1 is passed through the pre-drilled hole, and the nut 9 is screwed on. The anchor plate 1 can then be fixed on the anchor plate, making the installation of the anchor plate simpler and more convenient, and improving construction efficiency.

[0040] Example 3

[0041] participate Figure 7-8 This is another specific embodiment of the present utility model. This embodiment is basically the same as embodiment 1 or 2, except that each through hole 6 extends radially along the anchor plate 1 to the outer wall of the anchor plate 1 to form a U-shaped groove.

[0042] In this embodiment, the through hole 6 is made into a keyway assembly hole, which can reduce the material consumption of anchor plates and directly assemble pre-extruded finished extruded anchors without the need for the extrusion step after cable threading, thus effectively improving construction efficiency.

[0043] Example 4

[0044] See Figure 9 This is another specific embodiment of the present utility model. This embodiment is basically the same as embodiment 1 or 2, except that the conical hole 5 and the through hole 6 are arranged symmetrically at intervals.

[0045] The hole structure in this embodiment adopts a symmetrical and spaced arrangement design, which can achieve a dense hole arrangement, making the diameter of the anchor plate 1 smaller than that of ordinary anchors. This arrangement can prevent stress concentration caused by the small hole wall, improve the compressive strength of the anchor plate, and the shape and hole arrangement of the anchor plate at both ends (tensioning end and fixed end) are completely consistent through this arrangement.

[0046] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these will not affect the implementation effect of this utility model or the practicality of the patent.

Claims

1. A composite anchor, characterized in that, It includes an anchor plate (1), a clamping plate (2) and a compression sleeve (3). The anchor plate (1) is provided with a number of channels corresponding to the number of steel strands (4). The channels include tapered holes (5) and through holes (6). Each tapered hole (5) has a groove (7) on the side near the end face.

2. The composite anchorage according to claim 1, characterized in that, The outer wall of the anchor plate (1) is provided with external threads (8), and the anchor plate (1) is screwed with a nut (9) through the external threads (8).

3. A composite anchorage according to claim 1 or 2, characterized in that, The conical holes (5) and through holes (6) are arranged in layers from the inside to the outside along the radial direction of the anchor plate (1).

4. A composite anchorage according to claim 3, characterized in that, The tapered hole (5) and through hole (6) are evenly distributed along the axis of the anchor plate (1).

5. A composite anchorage according to claim 3, characterized in that, Each of the aforementioned through holes (6) extends radially along the anchor plate (1) to the outer wall of the anchor plate (1) to form a U-shaped groove.

6. A composite anchorage according to claim 1 or 2, characterized in that, The tapered holes (5) and through holes (6) are arranged symmetrically at intervals.

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