A variable diameter section self-expanding hollow grouting anchor bolt

Abstract

This utility model discloses a variable-diameter section self-expanding hollow grouting anchor bolt, relating to the field of rock strata technology. It includes a grouting anchor bolt body, an outer support ring slidably mounted on the surface of the grouting anchor bolt body, a connecting support plate welded to the surface of the outer support ring, an auxiliary support column welded to the surface of the connecting support plate, and an expansion support plate rotatably mounted on the surface of the auxiliary support column. In this variable-diameter section self-expanding hollow grouting anchor bolt, the expansion support plate extends outward within the rock strata cavity. At this time, the grouting anchor bolt body, through the outer support ring and the extension of the expansion support plate in the variable-diameter section, allows the grouting anchor bolt body to form a more sufficient and reliable contact with the grouting fluid. This achieves the effect of the expansion support plate forming a variable-diameter section self-expanding reinforcement of the grouting anchor bolt body, thus improving the strength of the grouting anchor bolt body. Simultaneously, the 60-degree extension between the expansion support plate and the outer support ring also improves the overall hook-like design between the grouting anchor bolt body and the grouting fluid.

Description

Technical Field

[0001] This utility model relates to the field of layered rock technology, and in particular to a variable diameter section self-expanding hollow grouting anchor bolt. Background Technology

[0002] Currently, grouting anchors are new products developed based on the actual needs of tunnel engineering, slope treatment engineering, and coal mine roadway engineering in my country. The anchor body of the grouting anchor adopts a hollow design, with the central hole serving as a high-pressure ventilation and water channel for drilling and a grouting channel. Compared with solid anchors, the hollow anchor design can achieve better rigidity and shear strength.

[0003] After grouting, grouting anchors need to wait for the mortar to fully solidify before they can achieve sufficient strength. However, most existing grouting anchors are typically integral threaded rods. Because they are integrally formed, their surface does not have good extension and reinforcement properties to ensure a stronger bond with the grout. Therefore, a higher-strength variable-diameter self-expanding hollow grouting anchor is needed. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to solve the problems raised in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a variable diameter section self-expanding hollow grouting anchor bolt, comprising a grouting anchor bolt body, an outer support ring slidably installed on the surface of the grouting anchor bolt body, a connecting support plate welded to the surface of the outer support ring, an auxiliary support column welded to the surface of the connecting support plate, an expansion support plate rotatably installed on the surface of the auxiliary support column, and a torsion spring rotatably sleeved on the surface of the auxiliary support column, with the two ends of the torsion spring respectively fixedly installed on the surface of the auxiliary support column and the surface of the connecting support plate.

[0006] Preferably, the expansion support plates are arranged in four groups on the surface of the outer support ring, and the four groups of expansion support plates are evenly arranged on the surface of the outer support ring.

[0007] Preferably, a limiting post is slidably installed on the inner side of the outer support ring, and an elastic component is slidably sleeved on the surface of the limiting post. The two ends of the elastic component are respectively fixedly installed on the surface of the limiting post and the inner side of the outer support ring.

[0008] Preferably, the inner thread of the outer support collar is fitted with a positioning chuck, the inner side of the grouting anchor body is provided with an anchor bolt groove, and the surface of the limiting support is slidably mounted on the inner wall of the anchor bolt groove on the grouting anchor body.

[0009] Preferably, the surface of the grouting anchor body is provided with grouting holes, and a plug is slidably installed on the inner wall of the grouting holes on the grouting anchor body.

[0010] Preferably, the surface of the grouting anchor body is provided with a tray and a positioning nut, and the surface of the positioning nut is abutted against the surface of the tray.

[0011] Preferably, the number of outer support rings can be adjusted and added according to the length of the grouting anchor body.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) The variable diameter section self-expanding hollow grouting anchor rod has an expansion support plate that extends outward inside the rock stratum. At this time, the grouting anchor rod body extends outward through the outer support ring in the variable diameter section after the expansion support plate extends outward. Therefore, the grouting anchor rod body can form a more sufficient and reliable contact with the grouting liquid through the expansion support plate, thereby realizing the effect of the expansion support plate forming a variable diameter section self-expanding reinforcement of the grouting anchor rod body. Thus, the strength of the grouting anchor rod body is improved. At the same time, the 60-degree extension between the expansion support plate and the outer support ring also improves the overall hook setting between the grouting anchor rod body and the grouting liquid, thereby further improving the strength between the grouting anchor rod body and the solidified grouting liquid.

[0014] (2) The variable diameter section is a self-expanding hollow grouting anchor rod. The operator then adjusts and presses the positioning clip and the outer support ring with the thread, so that the limiting support and the anchor bolt groove on the grouting anchor rod body form a fixed connection. At this time, the assembly and positioning between the outer support ring and the grouting anchor rod body are formed. This method ensures the ease of operation when positioning and assembling the outer support ring and the grouting anchor rod body. Therefore, it ensures the flexibility of the outer support ring and the grouting anchor rod body in the variable diameter section assembly operation, and also improves the good reinforcement effect of the grouting anchor rod body and the outer support ring. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a structural schematic diagram of a variable-diameter section self-expanding hollow grouting anchor rod according to the present invention;

[0017] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A;

[0018] Figure 3 This is a schematic diagram of the planar structure of the expansion support plate of this utility model;

[0019] Figure 4 This is a schematic diagram of the planar structure of the outer support ring of this utility model.

[0020] Reference numerals in the attached drawings: 1. Grouting anchor body; 2. Tray; 3. Positioning nut; 4. Grouting hole; 5. Plug; 6. Outer support collar; 7. Connecting support plate; 8. Auxiliary support column; 9. Expansion support plate; 10. Torsion spring; 11. Limiting support column; 12. Elastic component; 13. Positioning clip; 14. Anchor bolt groove. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a variable diameter section self-expanding hollow grouting anchor rod, including a grouting anchor rod body 1, a tray 2 and a positioning nut 3 are provided on the surface of the grouting anchor rod body 1, the surface of the positioning nut 3 is abutted on the surface of the tray 2, and the function of the tray 2 and the positioning nut 3 is to limit and position the grouting anchor rod body 1 for assembly and use.

[0026] Furthermore, the surface of the grouting anchor body 1 is provided with grouting holes 4, and a plug 5 is slidably installed on the inner wall of the grouting holes 4 on the grouting anchor body 1. By setting the plug 5 on the inner wall of the grouting holes 4 on the grouting anchor body 1, a sealing protection can be formed when it is not in use, and the plug 5 can be removed when the grouting anchor body 1 is grouting, so that the grout can self-expand and solidify in the diameter-changing section.

[0027] Furthermore, an outer support ring 6 is slidably installed on the surface of the grouting anchor body 1, a connecting support plate 7 is welded to the surface of the outer support ring 6, an auxiliary support 8 is welded to the surface of the connecting support plate 7, an expansion support plate 9 is rotatably installed on the surface of the auxiliary support 8, and a torsion spring 10 is rotatably sleeved on the surface of the auxiliary support 8. The two ends of the torsion spring 10 are respectively fixedly installed on the surface of the auxiliary support 8 and the surface of the connecting support plate 7.

[0028] Specifically, when grouting is performed after the installation of the grouting anchor body 1, once the grouting anchor body 1 reaches and is positioned within the rock stratum, the expansion support plate 9 at the outer support ring 6 of the grouting anchor body 1 slides to a predetermined position inside the rock stratum cavity. The expansion support plate 9 is then twisted by the torsion spring 10 with torsional properties on the auxiliary support column 8, thereby causing the expansion support plate 9 to extend outward within the rock stratum cavity. At this time, after the grouting anchor body 1 extends outward through the outer support ring 6 at the variable diameter section, the grouting anchor body 1 can form a more sufficient and reliable contact with the grouting fluid through the expansion support plate 9. This achieves the effect of the expansion support plate 9 forming a self-expanding reinforcement of the variable diameter section of the grouting anchor body 1, thus improving the strength of the grouting anchor body 1. At the same time, the 60-degree extension between the expansion support plate 9 and the outer support ring 6 also improves the overall hook setting between the grouting anchor body 1 and the grouting fluid, further enhancing the strength between the grouting anchor body 1 and the solidified grouting fluid.

[0029] Furthermore, a limiting support column 11 is slidably installed on the inner side of the outer support ring 6, and an elastic component 12 is slidably sleeved on the surface of the limiting support column 11. The two ends of the elastic component 12 are respectively fixedly installed on the surface of the limiting support column 11 and the inner side of the outer support ring 6. A positioning chuck 13 is threaded on the inner side of the outer support ring 6. An anchor bolt groove 14 is opened on the inner side of the grouting anchor bolt body 1, and the surface of the limiting support column 11 is slidably installed on the inner wall of the anchor bolt groove 14 on the grouting anchor bolt body 1.

[0030] Specifically, when it is necessary to install the outer support ring 6 at the appropriate position on the grouting anchor body 1, the outer support ring 6 only needs to slide to the predetermined position on the grouting anchor body 1. At this time, the limiting column 11 is pushed by the elastic performance of the compressed elastic component 12 to match and connect with the anchor bolt groove 14 on the grouting anchor body 1. Then, the operator adjusts the positioning chuck 13 and the outer support ring 6 to make thread adjustment and pressing, so that the limiting column 11 and the anchor bolt groove 14 on the grouting anchor body 1 form a fixed connection. At this time, the assembly and positioning between the outer support ring 6 and the grouting anchor body 1 are formed. This method ensures the ease of operation when positioning and assembling the outer support ring 6 and the grouting anchor body 1, thus ensuring the flexibility of the outer support ring 6 in the variable diameter section assembly operation with the grouting anchor body 1, and also improving the good reinforcement effect of the grouting anchor body 1 and the outer support ring 6.

[0031] Working principle: A variable diameter section self-expanding hollow grouting anchor bolt, when the outer support ring 6 needs to be installed at the appropriate position on the grouting anchor bolt body 1, only needs to slide the outer support ring 6 to the predetermined position on the grouting anchor bolt body 1. At this time, the limiting support column 11 is pushed by the elastic performance of the compressed elastic component 12 to match and connect with the anchor bolt groove 14 on the grouting anchor bolt body 1. Then the operator adjusts the positioning chuck 13 and the outer support ring 6 with thread adjustment and pressing, so that the limiting support column 11 and the anchor bolt groove 14 on the grouting anchor bolt body 1 form a fixed connection. At this time, the assembly and positioning between the outer support ring 6 and the grouting anchor bolt body 1 is formed.

[0032] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A variable-diameter self-expanding hollow grouting anchor rod comprising a grouting anchor rod body (1), characterized in that: The surface of the grouting anchor body (1) is slidably installed with an outer support ring (6), a connecting support plate (7) is welded to the surface of the outer support ring (6), an auxiliary support column (8) is welded to the surface of the connecting support plate (7), an expansion support plate (9) is rotatably installed on the surface of the auxiliary support column (8), and a torsion spring (10) is rotatably sleeved on the surface of the auxiliary support column (8). The two ends of the torsion spring (10) are respectively fixedly installed on the surface of the auxiliary support column (8) and the surface of the connecting support plate (7).

2. The self-expanding hollow grouting anchor rod of claim 1, wherein: The expansion support plate (9) is arranged in four groups on the surface of the outer support ring (6), and the four groups of expansion support plates (9) are evenly arranged on the surface of the outer support ring (6).

3. The self-expanding hollow grouting anchor rod of claim 1, wherein: A limiting post (11) is slidably installed on the inner side of the outer support ring (6). An elastic component (12) is slidably sleeved on the surface of the limiting post (11). The two ends of the elastic component (12) are respectively fixedly installed on the surface of the limiting post (11) and the inner side of the outer support ring (6).

4. The variable-diameter self-expanding hollow grouting anchor rod according to claim 3, characterized in that: The inner thread of the outer support ring (6) is fitted with a positioning chuck (13), and the inner side of the grouting anchor body (1) is provided with an anchor bolt groove (14). The surface of the limiting support column (11) is slidably installed on the inner wall of the anchor bolt groove (14) on the grouting anchor body (1).

5. The variable-diameter self-expanding hollow grouting anchor rod according to claim 1, characterized in that: The surface of the grouting anchor body (1) is provided with grouting holes (4), and a plug (5) is slidably installed on the inner wall of the grouting holes (4) on the grouting anchor body (1).

6. The variable-diameter self-expanding hollow grouting anchor rod according to claim 1, characterized in that: The surface of the grouting anchor body (1) is provided with a tray (2) and a positioning nut (3), and the surface of the positioning nut (3) is installed in contact with the surface of the tray (2).

7. The variable-diameter self-expanding hollow grouting anchor bolt according to claim 1, characterized in that: The number of outer support rings (6) can be adjusted and added according to the length of the grouting anchor body (1).

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