Yielding energy-absorbing full-anchor bolt

Abstract

The utility model relates to a yielding energy-absorbing full anchor rod which comprises a hollow rod body and a solid rod body inserted into the rear end of the hollow rod body, a tray and a nut are arranged on the solid rod body, a grouting assembly is arranged between the tray and the nut, a stirring head is fixedly connected to the front end of the hollow rod body, and a yielding energy-absorbing block pressed on the solid rod body is fixedly connected to the rear end of the hollow rod body. Yielding energy absorption is achieved through resistance generated when the yielding energy absorption block and the solid rod body move relative to each other, anchoring is achieved at the hole bottom through a resin anchoring agent, anchoring is achieved at the hole opening through grouting, and therefore pressure release is facilitated; and the shearing resistance of the product can be improved by grouting and full anchoring.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor rods, in particular to a full-anchor anchor rod that allows pressure and absorbs energy. Background Art

[0002] At present, most anchor rods on the market use pressure-releasing bubble structures. In order to achieve pressure-releasing, this type of anchor rod cannot be fully grout-anchored, and the shear resistance of the rod is seriously insufficient. Full-anchor anchor rods are mostly hollow grouting anchor rods, and there are few casing grouting anchor rods. These two types of grouting anchor rods can achieve full grouting anchoring, but cannot achieve pressure-releasing function. In the current deep well mining, support requirements are getting higher and higher, requiring support products to absorb a certain amount of energy, which is conducive to pressure release, and full grouting anchoring can improve the shear resistance of the product. Utility Model Content

[0003] The utility model aims at the deficiencies of the prior art and provides a pressure-absorbing full-anchor anchor rod, which can realize the pressure-absorbing energy function and can also be used for grouting full-anchor.

[0004] The utility model is realized through the following technical scheme, which provides a pressure-absorbing full-anchor anchor rod, including a hollow rod body and a solid rod body inserted into the rear end of the hollow rod body, the rear end of the hollow rod body is fixedly connected with a pressure-absorbing block press-fitted on the solid rod body, the inner circle of the pressure-absorbing block is provided with a press-fitting protrusion, and the solid rod body is provided with a press-fitting groove adapted to the press-fitting protrusion.

[0005] The solid rod body and the hollow rod body in this scheme are both anchored in the hole. When a certain force is reached, the solid rod body is pulled out of the pressure-absorbing energy block, and the press-fit protrusions on the inner ring of the pressure-absorbing energy block deform the outer ring of the solid rod body. This process realizes pressure-absorbing energy.

[0006] As an optimization, the pressure-absorbing block is threadedly connected to the hollow rod body, thereby achieving fixation of the pressure-absorbing block.

[0007] As an optimization, a tray and a nut are mounted on the solid rod body, and a grouting assembly is mounted between the tray and the nut. Grout is injected through the grouting assembly to achieve grouting full anchoring.

[0008] As an optimization, the grouting assembly includes a grouting body and a grouting connecting pipe connected to the grouting body. The front end of the grouting body is fixedly connected with a grouting sleeve sleeved on the solid rod body, and the rear end of the grouting body is equipped with a sealing plug. In this solution, one end of the grouting body is connected to the grouting sleeve, and the other end is a conical hole, which cooperates with the conical structure of the sealing plug. The grouting connecting pipe is connected to the outer cylinder of the grouting body. The grouting connecting pipe is connected to the grouting body and the inside of the grouting sleeve to form a space. During grouting, the slurry flows along the space to the inside of the drill hole to achieve grouting of the solid rod body part.

[0009] As an optimization, the front end of the hollow rod body is fixed with a stirring head. The stirring head in this solution can fully stir the resin anchor, which is conducive to the resin anchor flowing from the bottom of the drill hole to the hole mouth, and is used to block the front end of the hollow rod body to prevent the resin from entering the hollow rod body during the installation process of the anchor.

[0010] As an optimization, a protrusion is provided outside the hollow rod body to improve the resin anchoring effect.

[0011] As an optimization, the hardness of the solid rod body is less than the hardness of the press-fitting protrusion, so that the outer ring of the solid rod body can be deformed by the press-fitting protrusion, and continuous pressure release can be achieved in the whole release process.

[0012] As an optimization, the outer ring of the solid rod body is fixedly connected with a blocking ring located in front of the pressure-releasing energy-absorbing block to prevent the solid rod body from completely detaching from the pressure-releasing energy-absorbing block.

[0013] As an optimization, a partition is provided on the hollow rod body behind the pressure-absorbing block, which separates the rod body from the grouting material when the rod body is fully anchored by grouting.

[0014] The beneficial effects of the utility model are as follows: the utility model is a pressure-absorbing full-anchor anchor rod, which realizes pressure-absorbing energy by the resistance when the pressure-absorbing energy block and the solid rod body move relative to each other, and the bottom of the hole is anchored by a resin anchoring agent, and the hole mouth is anchored by grouting, which is beneficial to pressure release, and the shear resistance of the product can be improved by grouting the full anchor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional schematic diagram of the grouting component of the utility model;

[0017] Figure 3 It is a schematic diagram of the pressure-releasing process of the solid rod body and the pressure-releasing energy-absorbing block of the utility model;

[0018] Figure 4 It is a schematic diagram of the pressure-releasing process of the solid rod body and the pressure-releasing energy-absorbing block of the utility model;

[0019] Figure 5 It is a schematic diagram of the pressure-releasing process of the solid rod body and the pressure-releasing energy-absorbing block of the utility model;

[0020] Figure 6 It is a cross-sectional schematic diagram of the utility model in use;

[0021] As shown in the figure:

[0022] 1. Mixing head, 2. Hollow rod body, 3. Blocking ring, 4. Solid rod body, 5. Pressure absorbing block, 6. Partition, 7. Tray, 8. Grouting assembly, 9. Nut, 81. Grouting body, 82. Grouting connecting pipe, 83. Sealing plug, 84. Grouting sleeve. DETAILED DESCRIPTION

[0023] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0024] like Figures 1 to 6 As shown, the utility model is a pressure-absorbing full-anchor anchor rod, including a hollow rod body 2 and a solid rod body 4 inserted into the rear end of the hollow rod body 2. The outside of the hollow rod body 2 is provided with a protrusion to improve the resin anchoring effect. The front end of the hollow rod body 2 is fixedly connected to a stirring head 1. The stirring head 1 has a stirring tooth structure, which can fully stir the resin anchoring agent, which is beneficial for the resin anchoring agent to flow from the bottom of the drill hole to the hole mouth, and is also used to block the front end of the hollow rod body 2 to prevent the resin from entering the hollow rod body during the installation process of the anchoring.

[0025] A pressure-releasing energy-absorbing block 5 which is press-fitted onto the solid rod body 4 is fixedly connected to the rear end of the hollow rod body 2 . In this embodiment, the pressure-releasing energy-absorbing block 5 is threadedly connected to the hollow rod body 2 .

[0026] The pressure absorbing block 5 is cylindrical in shape, and has a hole along the axis of the cylinder that matches the solid rod 4. After the two are assembled, the pressure absorbing block 5 and the solid rod 4 are pressed together by a machine. In order to ensure that the two materials do not stick together, a spray material can be attached to the solid rod 4 before pressing.

[0027] The inner circle of the pressure-absorbing block 5 is provided with a press-fitting protrusion, and the solid rod body 4 is provided with a press-fitting groove adapted to the press-fitting protrusion. The press-fitting protrusion in this embodiment is annular, and when the pressure is released, the press-fitting protrusion moves axially relative to the solid rod body 4, and the compression deformation of the press-fitting groove is increased to achieve continuous pressure release.

[0028] The hardness of the solid rod body 4 is less than the hardness of the press-fit protrusion. The energy-absorbing block 5 is made of a material with high yield strength and high toughness. The solid rod body material is heat-treated, and the heat-treated hardness does not exceed HRC10.

[0029] The outer ring of the solid rod body 4 is fixedly connected with a blocking ring 3 located in front of the pressure-releasing energy-absorbing block 5 to prevent the solid rod body 4 from completely detaching from the pressure-releasing energy-absorbing block 5.

[0030] The solid rod body 4 is provided with a tray 7 and a nut 9 . The rear end of the solid rod body is processed with threads for screwing the nut 9 . A grouting assembly 8 is provided between the tray 7 and the nut 9 .

[0031] The grouting assembly 8 includes a grouting body 81 and a grouting connecting pipe 82 connected to the grouting body 81 . A grouting sleeve 84 sleeved on the solid rod body 4 is fixedly connected to the front end of the grouting body 81 , and a sealing plug 83 is installed at the rear end of the grouting body 81 .

[0032] The grouting sleeve 84 is a flexible thin-walled tube with rough concave and convex patterns on the outer wall. To ensure that the slurry can pass through the grouting channel more smoothly, several grouting holes are drilled on the grouting sleeve 84. One end of the grouting body 81 is connected to the grouting sleeve 81, and the other end is a tapered hole, which cooperates with the tapered structure of the sealing plug 83. The grouting connecting pipe 82 is connected to the outer cylinder of the grouting body 81. The grouting connecting pipe 82 is connected to the grouting body 81 and the inside of the grouting sleeve 84 to form a space. During grouting, the slurry flows along the space to the inside of the drilled hole to achieve grouting of the solid rod part.

[0033] The hollow rod body 2 behind the pressure-absorbing block 5 is provided with a partition 6. After the assembly is completed, a part of the solid rod body is sheathed inside the hollow rod body, and a part of it is left outside. The rod body left outside is covered with a partition material except for the threaded part, and the rod body is separated from the grouting material when the rod body is grouted and fully anchored.

[0034] The grouting sleeve assembly is sleeved on the solid rod body (the grouting sleeve 84 is sleeved on the outside of the interlayer), the grouting sleeve 84 passes through the tray 7 and is sleeved on the solid rod body 4, the nut 9 is pressed on one end of the sealing plug 83 of the grouting sleeve assembly, and the sealing plug is pressed after the end anchor, sealing the gap around the rod body to prevent the slurry from flowing out. In this way, the grouting is fully anchored in the borehole, and the pressure absorption energy can be achieved.

[0035] In this embodiment, the resin anchoring end is processed by a hollow rod body with spiral ribs on the outside, with an outer diameter of 36mm, an inner hole of 28mm, a length of 600mm, and an M30X2 internal thread processed on one end. The stirring head has stirring teeth with a maximum outer diameter of 36mm. The pressure absorbing block has an outer diameter of 35mm and a length of 60mm. The energy absorbing block has an external thread connected to the hollow rod body. The solid rod body has a diameter of 22mm, and one end is rolled with an M24 thread. The outer diameter of the grouting sleeve is 28mm.

[0036] The use of the utility model:

[0037] After drilling, insert the resin anchor into the drilled hole, push the resin anchor into the bottom of the hole through the solid rod 4 and the hollow rod 2, rotate the solid rod 4 and the hollow rod 2 to fully stir the resin anchor, which is conducive to the resin anchor flowing from the bottom of the drilled hole to the hole mouth.

[0038] The tray 7 and the grouting assembly 8 are installed at the hole mouth and fastened with the nut 9. Grouting is performed through the grouting connecting pipe 82. The slurry flows along the space to the inside of the borehole to achieve grouting of the solid rod part.

[0039] When a certain force is reached, the solid rod body 4 is pulled out from the pressure-absorbing energy block 5, and the press-fitting protrusions on the inner circle of the pressure-absorbing energy block 5 deform the outer circle of the solid rod body 4. This process realizes pressure-absorbing energy.

[0040] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A pressure-absorbing full-anchor anchor bolt, characterized in that: The invention comprises a hollow rod body (2) and a solid rod body (4) inserted into the rear end of the hollow rod body (2); a pressure-absorbing block (5) press-fitted on the solid rod body (4) is fixedly connected to the rear end of the hollow rod body (2); a press-fitting protrusion is provided on the inner ring of the pressure-absorbing block (5); and a press-fitting groove adapted to the press-fitting protrusion is provided on the solid rod body (4).

2. The pressure-absorbing full-anchor anchor rod according to claim 1, characterized in that: The pressure-absorbing energy block (5) is threadedly connected to the hollow rod body (2).

3. The pressure-absorbing full-anchor anchor rod according to claim 1, characterized in that: The solid rod body (4) is provided with a tray (7) and a nut (9), and a grouting assembly (8) is provided between the tray (7) and the nut (9).

4. The pressure-releasing energy-absorbing full-anchor anchor bolt according to claim 3, characterized in that: The grouting assembly (8) comprises a grouting body (81) and a grouting connection pipe (82) connected to the grouting body (81); a grouting sleeve (84) sleeved on the solid rod body (4) is fixedly connected to the front end of the grouting body (81); and a sealing plug (83) is installed at the rear end of the grouting body (81).

5. The pressure-releasing energy-absorbing full-anchor anchor bolt according to claim 1, characterized in that: The front end of the hollow rod body (2) is fixedly connected to a stirring head (1).

6. The pressure-releasing energy-absorbing full-anchor anchor bolt according to claim 1, characterized in that: The hollow rod body (2) is provided with a protrusion on the outside.

7. The pressure-absorbing full-anchor anchor rod according to claim 1, characterized in that: The hardness of the solid rod body (4) is smaller than the hardness of the press-fitting protrusion.

8. The pressure-releasing energy-absorbing full-anchor anchor bolt according to claim 1, characterized in that: The outer ring of the solid rod body (4) is fixedly connected to a blocking ring (3) located in front of the pressure-absorbing energy block (5).

9. The pressure-releasing energy-absorbing full-anchor anchor bolt according to claim 1, characterized in that: A partition layer (6) is provided on the hollow rod body (2) behind the pressure-absorbing energy block (5).

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