Rock hole anti-pulling anchoring part

Abstract

The utility model relates to the technical field of building construction, in particular to a rock hole anti-pulling anchoring part. The expansion cylinder comprises a mounting part and a plurality of fins, the plurality of fins are fixed on the mounting part, the plurality of fins define a cavity for the expansion cone to be inserted, the maximum outer diameter of the expansion cone is larger than the inner diameter of the cavity, a first inclined surface is arranged on one surface, close to the cavity, of each fin, and the inclination of the first inclined surface is equal to that of the expansion cone. Damage of the fins to the divergent cone is reduced, steps are prevented from being formed on the side wall of the divergent cone, and therefore the situation that the fins abut against the steps and cannot continue to deform is avoided.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and in particular to a rock hole pull-out anchor. Background Technology

[0002] Anchor bolts are the main load-bearing members in soil and rock reinforcement systems. Through longitudinal tension, the anchor bolt system enhances the tensile strength of the soil and rock mass, achieving stability. Before installing anchor bolts, anchor holes must be drilled in the ground, the anchor bolts are fixed into the holes, and the holes are grouted to complete the installation.

[0003] After the anchor hole is driven into the rock strata, pull-out anchoring is used to fix the anchor rod. Pull-out anchoring usually includes an expansion cone and an expansion tube. The expansion tube is equipped with several fins. The anchor rod is fixed to the expansion tube. When installing the anchor rod, the expansion cone and expansion tube are placed into the anchor hole together. Then, by tapping the anchor rod, the expansion cone is moved into the expansion tube, which causes the fins to deform and be squeezed between the expansion cone and the inner wall of the anchor hole. The anchor rod is fixed by the friction between the fins and the rock mass and the friction between the expansion cone and the fins.

[0004] However, during the process of striking the anchor bolt, the edge of the fin comes into contact with the sidewall of the expansion cone, which can easily cause damage to the sidewall of the expansion cone, forming a step and affecting its use. Utility Model Content

[0005] The purpose of this application is to provide a rock hole pull-out anchor for reducing damage to the expansion cone by the fins and avoiding the formation of steps on the sidewall of the expansion cone, thereby preventing the fins from abutting against the steps and being unable to continue deforming.

[0006] The rock hole pull-out anchor provided in this application adopts the following technical solution:

[0007] A rock hole pull-out anchor, comprising:

[0008] Expansion cone;

[0009] An expansion cylinder includes a mounting part and fins. Several fins are provided, and each of the fins is fixed on the mounting part. The fins form a cavity for the expansion cone to be inserted. The maximum outer diameter of the expansion cone is greater than the inner diameter of the cavity. A first inclined surface is provided on the side of the fin near the cavity, and the first inclined surface has the same inclination as the expansion cone.

[0010] Optionally, several of the fins are evenly distributed around the mounting portion.

[0011] Optionally, the expansion cone includes an expansion portion and a fixing portion. The fixing portion has a first sliding groove, and the expansion portion is slidably inserted into the first sliding groove. The fixing portion is provided with a fixing block, which can slide away from the fixing portion and can be inserted into the inner wall of the anchor hole.

[0012] Optionally, the fixing part is provided with a second sliding groove, the fixing block is slidably disposed in the second sliding groove and one end extends into the first sliding groove, the side of the fixing block near the expansion part is provided with a first guide surface, the expansion part can abut against the first guide surface and push one end of the fixing block to slide out of the second sliding groove.

[0013] Optionally, a second guide surface is provided at one end of the expansion portion near the first guide surface, and the second guide surface has the same slope as the first guide surface.

[0014] Optionally, the end of the fixing block away from the first groove is provided with a second inclined surface.

[0015] Optionally, there are two second inclined surfaces, which are arranged symmetrically to each other.

[0016] Optionally, the fin has an insertion hole, the expansion portion has a telescopic groove, a pin is slidably disposed in the telescopic groove, and an elastic element is disposed between the pin and the inner wall of the telescopic groove. One end of the elastic element acts on the pin and the other end acts on the inner wall of the telescopic groove. The fin can slide until the pin corresponds to the insertion hole and the pin is inserted into the insertion hole.

[0017] By setting the first inclined surface, this application reduces the pressure between the fin and the expansion cone, thereby avoiding the situation where steps are chiseled out on the expansion cone. This also reduces the possibility that the fin will be unable to continue bending and deforming due to the formation of steps, ensuring the normal use of pull-out anchoring.

[0018] Furthermore, this application uses a fixing block inserted into the inner wall of the anchor hole, and the expansion part is fixed to the fin, so that when the anchor rod is subjected to tension, the tension can be transmitted to the inner wall of the anchor hole through the pin, the expansion part and the fixing block, thereby further increasing the pull-out resistance of the anchor rod. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a rock hole pull-out anchor in Embodiment 1 of this application.

[0020] Figure 2 This is a cross-sectional structural schematic diagram of the expansion cylinder of Embodiment 1 of this application.

[0021] Figure 3 This is a cross-sectional structural schematic diagram of the expansion cone in Embodiment 2 of this application.

[0022] In the figure, 1 is the expansion cone; 11 is the expansion part; 111 is the second guide surface; 112 is the telescopic groove; 113 is the elastic element; 114 is the pin; 12 is the fixing part; 121 is the first slide groove; 122 is the second slide groove; 2 is the expansion cylinder; 21 is the mounting part; 22 is the fin; 221 is the first inclined surface; 23 is the cavity; 3 is the fixing block; 31 is the first guide surface; 32 is the second inclined surface. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below. Example 1:

[0024] A rock hole pull-out anchor, referring to Figure 1 and Figure 2 The system includes an expansion cone 1 and an expansion cylinder 2. When installing the anchor bolt, the anchor bolt is first fixed to the expansion cylinder 2. Then, the expansion cone 1 and the expansion cylinder 2 are placed into the anchor hole together, and the anchor bolt is tapped to make the expansion cone 1 insert into the expansion cylinder 2, thereby causing the expansion cylinder 2 to expand and press against the inner wall of the anchor hole and against the expansion cone 1. The anchor bolt is fixed by the friction between the expansion cylinder 2 and the expansion cone 1, and the friction between the expansion cylinder 2 and the inner wall of the anchor hole.

[0025] Specifically, the expansion cylinder 2 includes a mounting part 21 and fins 22. The anchor rod is fixed on the mounting part 21. Several fins 22 are provided, and all fins 22 are fixed on the mounting part 21. In this embodiment, the several fins 22 are evenly distributed around the mounting part 21, so that when the several fins 22 bend and deform, the force on the expansion cone 1 is uniform, and the connection is more stable. The fins 22 surround a circle and form a cavity 23 in the middle of the several fins 22 for the expansion cone 1 to insert. The maximum outer diameter of the expansion cone 1 is larger than the inner diameter of the cavity 23. Therefore, when the expansion cone 1 is inserted into the cavity 23, the several fins 22 will bend and deform under the guidance of the expansion cone 1 and insert between the expansion cone 1 and the inner wall of the anchor hole. The expansion cone 1 is fixed to the inner wall of the anchor hole through the interference fit between the fins 22 and the expansion cone 1, that is, the anchor rod is fixed.

[0026] Furthermore, each fin 22 has a first inclined surface 221 on the side near the cavity 23. The inclination of the first inclined surface 221 is the same as that of the expansion cone 1. When the expansion cone 1 is inserted into the cavity 23, the first inclined surface 221 fits against the expansion cone 1 and contacts the surface of the expansion cone 1. Under the simultaneous guiding action of the first inclined surface 221 and the expansion cone 1, the fin 22 undergoes bending deformation, causing it to deform away from the expansion cone 1. Due to the provision of the first inclined surface 221, the pressure between the fin 22 and the expansion cone 1 is reduced, and the fin 22 is guided, making it easier for the fin 22 to undergo bending deformation. This reduces the possibility of excessive pressure during the insertion of the expansion cone 1 into the cavity 23, which could cause steps to be chiseled on the side wall of the expansion cone 1, thus affecting the bending deformation of the fin 22. Example 2:

[0027] This embodiment has a structure that is largely the same as that of Embodiment 1, except for the improvement of the expansion cone 1.

[0028] Reference Figure 3 The expansion cone 1 includes an expansion part 11 and a fixing part 12. The top surface of the fixing part 12 is provided with a first sliding groove 121. The top of the expansion part 11 is cone-shaped and the bottom end of the expansion part 11 is slidably inserted into the first sliding groove 121. The fixing block 3 is provided with a fixing block 3. The fixing block 3 can slide away from the fixing part 12 and can be inserted into the inner wall of the anchor hole.

[0029] During the process of the expansion portion 11 being inserted into the cavity 23, the fixing portion 12 slides towards the inner wall of the anchor hole and is inserted into the inner wall of the anchor hole, thereby fixing the expansion cone 1 to the inner wall of the anchor hole. Furthermore, due to the interference fit between the fin 22 and the expansion portion 11, the fixing effect on the anchor rod is further enhanced, and the pull-out resistance is further increased.

[0030] Specifically, the fixing part 12 has a second sliding groove 122. The fixing block 3 is slidably disposed in the second sliding groove 122 with one end extending into the first sliding groove 121. The side of the fixing block 3 near the expansion part 11 has a first guide surface 31. The expansion part 11 can abut against the first guide surface 31 and push one end of the fixing block 3 out of the second sliding groove 122. When the fixing part 12 is placed at the bottom of the anchor hole, the expansion part 11 abuts against the first guide surface 31 and is inserted into the cavity 23. Striking the anchor rod causes the expansion cylinder 2 to move continuously downward, causing the fins 22 to deform. At the same time, the expansion part 11 moves downward and pushes the fixing block 3 away from the first sliding groove 121 through the first guide surface 31 and inserts it into the inner wall of the anchor hole, thereby fixing the fixing part 12 to the inner wall of the anchor hole.

[0031] Furthermore, a second guide surface 111 is provided at one end of the expansion portion 11 near the first guide surface 31. The second guide surface 111 has the same slope as the first guide surface 31. By providing the second guide surface 111, the pressure between the expansion portion 11 and the fixing block 3 is reduced, thereby reducing damage to the fixing block 3.

[0032] In this embodiment, the expansion part 11 is slidably disposed on the first guide surface 31, so that the expansion part 11 is connected to the fixing block 3. Therefore, when the expansion part 11 is subjected to an upward force, it will be transmitted to the fixing block 3 and to the inner wall of the anchor hole, thereby increasing the pull-out resistance of the anchor rod.

[0033] Furthermore, a second inclined surface 32 is provided at the end of the fixing block 3 away from the first sliding groove 121. By providing the second inclined surface 32, the pressure of the fixing block 3 when it is inserted into the inner wall of the anchor hole is reduced, thereby making it easier for the fixing block 3 to be chiseled into the inner wall of the anchor hole.

[0034] Furthermore, there are two second inclined surfaces 32, which are symmetrically arranged. By setting two second inclined surfaces 32, the pressure between the fixing block 3 and the inner wall of the anchor hole is further increased, which makes it easier for the fixing block 3 to be drilled into the inner wall of the anchor hole.

[0035] Furthermore, the fin 22 has an insertion hole (not shown in the figure), and the expansion portion 11 has a telescopic groove 112. A pin 114 is slidably disposed in the telescopic groove 112. An elastic element 113 is disposed between the pin 114 and the inner wall of the telescopic groove 112. One end of the elastic element 113 acts on the pin 114, and the other end acts on the inner wall of the telescopic groove 112. The fin 22 can slide until the pin 114 corresponds to the position of the telescopic groove 112, and the pin 114 is inserted into the telescopic groove 112. In this embodiment, the elastic element 113 is a spring.

[0036] During the bending deformation of fin 22, fin 22 moves downward continuously until pin 114 corresponds to the position of the insertion hole. At this time, elastic element 113 returns to its original state, driving pin 114 to reset, so that pin 114 is inserted into the insertion hole, fixing fin 22 and expansion part 11 to each other. At this time, fixing block 3 is inserted into the inner wall of anchor hole. When anchor rod is subjected to tension, it is transmitted to fin 22 through mounting part 21, then to pin 114 through fin 22, and then to expansion part 11 through expansion part 11. Expansion part 11 transmits the force to the inner wall of anchor hole through fixing block 3, thereby further increasing the pull-out resistance of anchor rod.

[0037] Furthermore, the end of the pin 114 away from the elastic element 113 is hemispherical, and during the downward movement of the fin 22, the pin 114 can be pressed into the telescopic groove 112 by the fin 22.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rock hole pull-out anchor, characterized in that, include: Expansion cone (1); An expansion cylinder (2) includes a mounting part (21) and fins (22). Several fins (22) are provided, and several fins (22) are fixed on the mounting part (21). Several fins (22) form a cavity (23) for the expansion cone (1) to be inserted. The maximum outer diameter of the expansion cone (1) is greater than the inner diameter of the cavity (23). A first inclined surface (221) is provided on the side of the fin (22) near the cavity (23). The first inclined surface (221) has the same inclination as the expansion cone (1).

2. The rock hole pull-out anchor according to claim 1, characterized in that, Several of the fins (22) are evenly distributed around the mounting portion (21).

3. The rock hole pull-out anchor according to claim 1, characterized in that, The expansion cone (1) includes an expansion part (11) and a fixing part (12). The fixing part (12) is provided with a first sliding groove (121). The expansion part (11) slides into the first sliding groove (121). The fixing part (12) is provided with a fixing block (3). The fixing block (3) can slide away from the fixing part (12) and can be inserted into the inner wall of the anchor hole.

4. The rock hole pull-out anchor according to claim 3, characterized in that, The fixing part (12) is provided with a second slide groove (122). The fixing block (3) is slidably disposed in the second slide groove (122) and one end extends into the first slide groove (121). The side of the fixing block (3) near the expansion part (11) is provided with a first guide surface (31). The expansion part (11) can abut against the first guide surface (31) and push one end of the fixing block (3) to slide out of the second slide groove (122).

5. A rock hole pull-out anchor as described in claim 4, characterized in that, The expansion portion (11) has a second guide surface (111) at one end near the first guide surface (31), and the second guide surface (111) has the same slope as the first guide surface (31).

6. The rock hole pull-out anchor according to claim 3, characterized in that, The fixed block (3) has a second inclined surface (32) at the end away from the first slide groove (121).

7. A rock hole pull-out anchor as described in claim 6, characterized in that, There are two second inclined planes (32), and the two second inclined planes (32) are arranged symmetrically to each other.

8. A rock hole pull-out anchor as described in any one of claims 3 to 7, characterized in that, The fin (22) has an insertion hole, and the expansion part (11) has a telescopic groove (112). A pin (114) is slidably disposed in the telescopic groove (112). An elastic element (113) is disposed between the pin (114) and the inner wall of the telescopic groove (112). One end of the elastic element (113) acts on the pin (114) and the other end acts on the inner wall of the telescopic groove (112). The fin (22) can slide until the pin (114) corresponds to the insertion hole and the pin (114) is inserted into the insertion hole.

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