Multi-section type large-expansion-angle expansion-shell anchor head

Abstract

The utility model discloses a multi-section type large-expansion-angle expansion shell anchor head, relates to the technical field of anchoring support, and aims to improve the expansion angle of expansion sheets and the expansion smoothness of the expansion sheets by improving the structure of an anchor head body, so that the practicability is better. Comprising an anchor head body and expansion pieces, diagonal planes are symmetrically arranged on the two sides of the anchor head body, and each diagonal plane comprises a connecting section and an angle expanding section which are connected with each other; wherein the axial included angle between the connecting section and the anchor head body is smaller than the axial included angle between the angle expanding section and the anchor head body; a screw hole is axially formed in the side, where the connecting section is located, of the anchor head body; a guide groove is formed in the side, where the angle expanding section is located, of the anchor head body; the expansion pieces are connected to the diagonal planes in a sliding mode through the guide grooves.

Description

Technical Field

[0001] This utility model relates to the field of anchoring support technology, specifically to a multi-segment large-angle expansion shell anchor head. Background Technology

[0002] Expansion shell anchor heads are common civil engineering structural components, typically used to reinforce and stabilize geological bodies such as rock and soil. They generally consist of an outer shell, inner core, anchor bolt, and anchor pad, each part employing a special design to effectively ensure the stability and reliability of the anchor head. They are usually made of high-quality alloy steel, possessing high strength and hardness, and are not prone to deformation or damage during long-term use. Installation is simple and quick, requiring only fixing and rotating the anchor bolt to tighten it, without complex procedures, making them widely applicable.

[0003] The utility model application CN202420201991.9 discloses an expansion shell anchor head for anchor bolts and anchor cables. This utility model, through the setting of a reciprocating screw, when the locking flap cannot move and expand after the anchor bolt and the expansion shell anchor head body are connected, the drive motor will drive the reciprocating screw to move. When the reciprocating screw moves, it will drive the position of the threaded ring to move, which in turn will drive the position of the square plate through the threaded ring, which in turn will drive the position of the locking flap to move, thereby achieving the purpose of automatically adjusting the position of the locking flap, thus improving the practicality of the expansion shell anchor head for anchor bolts and anchor cables.

[0004] Although this utility model solves the problem of the card flap (expansion piece) being unable to move, expand, or be difficult to adjust by driving a motor, the cost will increase if a motor is added since the expansion shell anchor head itself is a disposable item. Moreover, the structure is relatively complex and difficult to produce. At the same time, due to its structure, the opening angle of the card flap is small, and sometimes the inner diameter of the installation hole of the expansion shell anchor head is large due to factors such as complex terrain, and this structure cannot handle the situation well. Utility Model Content

[0005] I. Technical problems to be solved

[0006] This invention addresses the shortcomings of existing technologies by proposing a multi-segment, large-angle expansion shell anchor head. By improving the structure of the anchor head body, the opening angle of the expansion plates is increased, as is the smoothness of the expansion plates opening, resulting in better practicality.

[0007] II. Specific Technical Solutions

[0008] A multi-segment, large-angle expansion-shell anchor head includes an anchor head body and expansion plates. The anchor head body has symmetrically arranged beveled surfaces on both sides. Each beveled surface includes a connecting segment and an expanding segment. The angle between the connecting segment and the central axis of the anchor head body is smaller than the angle between the expanding segment and the anchor head body's axial direction. The anchor head body has an axially formed threaded hole on the side containing the connecting segment. A guide groove is provided on the side containing the expanding segment. The expansion plates are slidably connected to the beveled surfaces via the guide grooves.

[0009] Implementation principle and working principle:

[0010] In this design, the beveled surface consists of two sections: a connecting section and an expanding section. The expansion piece is slidably connected to the anchor head body via a guide groove on the expanding section side. During actual installation of the expanding shell anchor head, the expansion piece is pushed along the guide groove by the anchor rod. The range of angle change of the expansion piece during the entire process from the connecting section to the expanding section is larger than that of existing technologies, making it suitable for anchor head mounting holes with a wider diameter range and improving its practicality. At the same time, the guide groove is only set in the expanding section, which can maintain the guiding effect while making the expansion piece's movement more flexible and convenient.

[0011] Preferably, an installation strip is provided on the side of the expansion piece connected to the beveled surface, and a limiting protrusion is provided on the side of the installation strip opposite to the widened section. The limiting protrusion cooperates with the guide groove. The beneficial effect of this preferred embodiment is that when installing the expansion piece, the installation strip is directly inserted into the guide groove. Since the gap between the installation strip and the guide groove is relatively large, the installation is more convenient. Then, the cooperation between the limiting protrusion and the guide groove makes it easier for the expansion piece to slide out later, and can provide good support after the expansion piece slides out.

[0012] Preferably, the side of the expansion piece away from the oblique cut surface is provided with a serrated limiting step; the beneficial effect of this preferred option is that, through the action of the serrated limiting step, the effective surface area of ​​the expansion piece can be larger and the anchoring effect can be better when it is anchored.

[0013] Preferably, the anchor head body is further provided with an arc-shaped spring ring, which is snapped between the sawtooth limiting steps; the arc-shaped spring ring includes two free ends, which extend away from the anchor head body and then move away from each other; the beneficial effect of this preferred embodiment is that by setting the arc-shaped spring ring, it is possible to effectively prevent the anchor head expansion plate from falling off during installation, which would affect the subsequent anchoring strength or anchoring effect. The structure of the free ends allows the arc-shaped spring ring to be directly snapped into the anchor head body, making installation more convenient.

[0014] Preferably, the width of the expansion piece gradually decreases from the connecting section to the expansion section, and the anchor body is also provided with a grout outlet hole on the side where the expansion section is located, and the grout outlet hole communicates with the screw hole; the beneficial effect of this preferred embodiment is that by setting the grout outlet hole, it is convenient to discharge anchoring fluid through the grout outlet hole after anchoring.

[0015] The beneficial effects of this utility model are as follows:

[0016] In this design, the expansion joint has a greater range of angle changes along the connecting section and the expansion section when it slides out, resulting in a larger effective opening angle and better applicability. The combination of the installation strip and the guide groove facilitates the installation of the expansion joint and also provides good support for it. Furthermore, the addition of the arc-shaped spring ring effectively prevents the expansion joint from falling off during the anchor head installation process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the anchor head body of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall assembly of the anchor head of this utility model.

[0019] Figure 3 This utility model Figure 1 Axonometric drawing.

[0020] Figure 4 This is a schematic diagram of the expansion plate structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the arc-shaped spring coil of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] Anchor head body 1, oblique cut surface 101, connecting section 102, widened section 103, screw hole 104, guide groove 105, slurry outlet hole 106, expansion plate 2, installation strip 201, limiting protrusion 202, serrated limiting step 203, arc-shaped spring ring 3, free end 301. Detailed Implementation

[0024] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] like Figure 1-5 As shown:

[0026] A multi-segment, large-angle expansion-shell anchor head includes an anchor head body 1 and expansion plates 2, wherein, as... Figure 1 The anchor head body 1 has symmetrically arranged oblique cut surfaces 101 on both sides. Each oblique cut surface 101 includes a connecting section 102 and an expanding section 103 connected together. The angle between the connecting section 102 and the axial direction of the anchor head body 1 is smaller than the angle between the expanding section 102 and the axial direction of the anchor head body 1. The anchor head body 2 has a screw hole 104 along the axial direction on the side where the connecting section 102 is located. The anchor head body 1 has a guide groove 105 on the side where the expanding section 102 is located. The expansion piece 2 is slidably connected to the oblique cut surface 101 through the guide groove 105.

[0027] like Figure 1 , 2 In section 3, the oblique section 101 is divided into two segments: the lower segment is the connecting segment 101, and the upper segment is the expanding segment 102. The expansion piece 2 is slidably connected to the anchor head body 1 through the guide groove 105 on the side of the expanding segment 102. During the actual installation of the expanding shell anchor head, the expansion piece 2 is pushed by the anchor rod to slide along the guide groove 105. During the entire process of sliding from the connecting segment 101 to the expanding segment 102, the range of the angle change between the expansion piece 2 and the axial direction is larger than that of the prior art, which can be applied to anchor head installation holes with a wider range of diameters, making it more practical. At the same time, the guide groove 105 is only set in the expanding segment 102, which can make the expansion piece slide more flexibly and conveniently while maintaining the guiding effect.

[0028] In specific implementation, in order to ensure the support strength of the expansion piece 2 and the smoothness of the sliding of the expansion piece 2, the length ratio of the connecting section 101 to the expansion section 102 is preferably 1:2, wherein the angle between the connecting section 101 and the central axis of the anchor head body 1 is preferably 0-3°, and the angle between the expansion section and the central axis of the anchor head body 1 is preferably 10-20°, with 15° being the most optimal.

[0029] Specifically, to facilitate the movement of the expansion piece 2, an installation strip 201 is provided on the side of the expansion piece 2 connected to the beveled surface 101. A limiting protrusion 202 is provided on the side of the installation strip 201 opposite to the widened section. The limiting protrusion 202 and the cross section of the installation strip are T-shaped. The limiting protrusion 202 cooperates with the guide groove 105. Specifically, when installing the expansion piece 2, the bottom of the installation strip 201 is directly inserted into the guide groove 105. Since the gap between the bottom of the installation strip 201 and the guide groove 105 is relatively large, the installation is more convenient. Then, the cooperation between the limiting protrusion 202 and the guide groove 105 makes it easier for the expansion piece 2 to slide out later, and can provide good support after the expansion piece 2 slides out.

[0030] Specifically, a serrated limiting step 203 is provided on the side of the expansion piece 2 away from the oblique cut surface 101; an arc-shaped spring ring 3 is also provided circumferentially on the anchor head body 1, and the arc-shaped spring ring 3 is engaged between the serrated limiting steps 203; the arc-shaped spring ring 3 includes two free ends 301, which extend away from the anchor head body and then move in opposite directions; the setting of the arc-shaped spring ring 301 can effectively prevent the expansion piece from falling off during the installation of the anchor head, which would affect the subsequent anchoring strength or anchoring effect. The structure of 01 allows the arc-shaped spring ring 3 to be directly snapped into the anchor head body 1, making installation more convenient. Furthermore, the sawtooth limiting step 203 enables the expansion piece 2 to have a larger effective surface area during anchoring, resulting in better anchoring effect and also serving as a limiting function for the arc-shaped spring ring 3. During implementation, the arc-shaped spring ring 3 has an inwardly recessed transition section at the junction of the expansion piece 2 and the anchor head body 1. This inwardly recessed transition section improves the fit between the arc-shaped spring ring 3 and the anchor head body 1, thereby enhancing the limiting effect.

[0031] During implementation, the width of the expansion piece 2 gradually decreases from the connecting section 102 to the expansion section 103. The anchor body 1 is also provided with a grout outlet hole 106 on the side where the expansion section 103 is located. The grout outlet hole 106 is connected to the screw hole 104. The setting of the grout outlet hole 106 facilitates the grouting of anchoring fluid after anchoring.

[0032] In this design, the expansion piece 2 has a larger angle change range along the connecting section and the expansion section when it slides out, and the effective opening angle of the expansion piece is larger, making it more applicable. With the cooperation of the installation strip 201 and the guide groove 105, the expansion piece 2 is easy to install and can also be well supported. Combined with the setting of the arc spring ring 3, the expansion piece 2 can be effectively prevented from falling off during the installation of the anchor head 2.

[0033] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims.

Claims

1. A multi-section, large-fluke, swedged shank anchor head, characterized by: The anchor head body (1) is provided with two symmetrical chamfered surfaces (101) on both sides, each chamfered surface (101) comprises a connecting section (102) and an angle expanding section (103) connected with each other; the angle between the connecting section (102) and the central axis of the anchor head body (1) is smaller than the angle between the angle expanding section (103) and the axial direction of the anchor head body (1); the anchor head body (1) is provided with a screw hole (104) in the axial direction on the side where the connecting section (102) is located; the anchor head body (1) is provided with a guide groove (105) on the side where the angle expanding section (103) is located; the expansion piece (2) is slidably connected to the chamfered surface (101) through the guide groove (105).

2. The multi-stage big flare hank anchor head according to claim 1, characterized in that: The side of the expansion piece (2) connected to the chamfered surface (101) is further provided with a mounting strip (201), the side of the mounting strip (201) opposite to the angle expanding section (103) is provided with a limiting protrusion (202), and the limiting protrusion (202) is matched with the guide groove (105).

3. The multi-stage big-foreshortening foreshortening hull anchor head of claim 2, wherein: The side of the expansion piece (2) away from the chamfered surface (101) is provided with a sawtooth limiting step (203).

4. The multi-stage big-foreshortening foreshortening hull anchor head of claim 3, wherein: The anchor head body (1) is further provided with an arc spring ring (3), the arc spring ring (3) is clamped between the sawtooth limiting steps (203), the arc spring ring (3) comprises two free ends (301), and the two free ends (301) extend away from the anchor head body (1) and then diverge.

5. The multi-stage big-foreshortening foreshortening hull anchor head of claim 1, wherein: The width of the expansion piece (2) gradually decreases from the connecting section (102) to the angle expanding section (103).

6. The multi-stage big-foreshortening foreshortening hull anchor head of claim 1, wherein: The anchor head body (1) is further provided with a grout outlet hole (106) on the side where the angle expanding section (103) is located, and the grout outlet hole (106) is communicated with the screw hole (104).

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