High-strength self-locking anchor rod nut with multi-stage wedge-shaped locking pieces

Abstract

The application discloses a high-strength self-locking anchor rod nut with multi-stage wedge-shaped locking pieces, and belongs to the technical field of anchoring devices. The high-strength self-locking anchor rod nut comprises a self-locking anchor rod which is slidably inserted into an anchor rod hole formed in the ground of a construction site. The self-locking anchor rod is placed in the anchor rod hole, and the basic fastening of the self-locking anchor rod is completed by tightly fixing the nut to tightly adhere to the anchor rod pad. The lower end surface of the locking nut is gradually inserted into the conical groove on the upper end surface of the fixing nut, so that the inclined surface of the wedge-shaped locking piece and the inclined surface of the conical groove are extruded with each other. The deformation gap provides space for the radial contraction of the wedge-shaped locking piece. With the tightening of the locking nut, the extrusion force is converted into radial clamping force along the inclined surface, so that the wedge-shaped locking piece is contracted to the center, thereby tightly holding the self-locking anchor rod, and forming mechanical engagement with stronger meshing force. The mechanical self-locking structure can effectively prevent the nut from loosening, and greatly improves the reliability of the anchor rod system.

Description

Technical Field

[0001] This application relates to the field of anchoring device technology, and in particular to a high-strength self-locking anchor nut with multi-stage wedge-shaped locking plates. Background Technology

[0002] An anchor bolt is a geotechnical engineering support structure. By embedding it inside the rock or soil mass, it utilizes the bond force, friction, or mechanical locking between the bolt and the soil to transfer the load of unstable rock or soil to stable strata, thereby reinforcing the rock or soil mass and preventing collapse or deformation. It is widely used in tunnels, mines, slopes, foundation pits, underground engineering, and other scenarios, and is one of the core components ensuring engineering safety. The anchor bolt nut, as a key fastening component in the anchor bolt system, has the core function of applying preload to the anchor bolt through tightening and transferring this preload to the construction ground or rock surface through the anchor bolt pad.

[0003] The traditional anchor bolts commonly used in engineering currently have simple matching nuts with no dedicated self-locking structure. They rely solely on the basic friction of the threaded meshing surface to achieve locking. Under long-term dynamic loads such as vibration and impact, the friction is prone to decay, causing the nut to loosen. Therefore, an improvement has been made to a high-strength self-locking anchor bolt nut with multi-stage wedge-shaped locking plates. Utility Model Content

[0004] In view of the shortcomings of the prior art, this application provides a high-strength self-locking anchor nut with multi-stage wedge locking plates, which overcomes the shortcomings of the prior art and aims to solve the problems in the prior art.

[0005] To achieve the above objectives, this application provides the following technical solution: a high-strength self-locking anchor nut with multi-stage wedge-shaped locking plates, comprising a self-locking anchor that is slidably inserted into an anchor hole opened inside the ground at the construction site, an anchor pad being slidably sleeved on the outer wall of the self-locking anchor near its upper end, a fixing nut and a locking nut being threadedly sleeved on the outer wall of the self-locking anchor above the anchor pad from bottom to top, a conical groove being opened on the upper end face of the fixing nut, and a plurality of wedge-shaped locking plates being fixedly connected to the lower end face of the locking nut in a circumferential array, with an expansion joint provided between any two adjacent wedge-shaped locking plates, and the wedge-shaped locking plates being slidably inserted into the interior of the conical groove.

[0006] By adopting the above technical solution, anchor holes are opened to place self-locking anchors. By tightening the fixing nut to make it fit tightly against the anchor pad, the preload is transferred to the ground at the construction site through the anchor pad, thus completing the foundation fastening of the self-locking anchor. When tightening the locking nut, the wedge-shaped locking plate on its lower end face is gradually inserted into the conical groove on the upper end face of the fixing nut. The inclined surface of the wedge-shaped locking plate and the inclined surface of the conical groove are pressed against each other. The expansion joint provides space for the radial contraction of the wedge-shaped locking plate. As the locking nut is tightened, the compressive force is converted into radial clamping force along the inclined surface, causing the wedge-shaped locking plate to contract towards the center, thus tightly holding the self-locking anchor and forming a stronger mechanical engagement. Even under long-term dynamic loads such as vibration and impact, this mechanical self-locking structure can effectively prevent the nut from loosening, greatly improving the reliability of the anchor system.

[0007] As a preferred technical solution of this application, two threaded holes are symmetrically opened on both sides of the outer wall of the locking nut, and a clamping rod is threaded into the interior of each of the two threaded holes. The outer end of the clamping rod is provided with an internal hexagonal hole.

[0008] By adopting the above technical solution, the clamping rod is tightened with a tool so that one end of it presses against the self-locking anchor rod, thereby increasing the friction between the locking nut and the self-locking anchor rod, preventing the locking nut from rotating and loosening, and further enhancing the locking effect.

[0009] As a preferred technical solution of this application, the self-locking anchor bolt includes an anchor bolt body, and an anchor bolt head is fixedly connected to the lower end of the anchor bolt body. The anchor bolt head has a tapered structure design and its diameter increases sequentially from top to bottom. A sleeve is slidably sleeved on the outer wall of the anchor bolt body, and the lower end of the sleeve is provided with an outwardly expanded portion for use with the anchor bolt head.

[0010] By adopting the above technical solution, a force is applied to the casing using professional tools to move it downwards. During the downward movement, the outward expansion at the lower end of the casing comes into contact with the anchor head and expands outwards under its action, exerting a squeezing effect on the rock and soil around the anchor hole, thereby realizing the self-locking function of the self-locking anchor and improving the stability of the self-locking anchor.

[0011] As a preferred technical solution of this application, the outer wall of the anchor rod body is provided with connecting threads, and the fixing nut, locking nut and wedge locking plate are all provided with threaded grooves that mesh with the connecting threads.

[0012] By adopting the above technical solution, this threaded fit design can ensure that the fixing nut and locking nut are easy to install and remove on the anchor bolt body.

[0013] As a preferred technical solution of this application, the outer wall of the wedge-shaped locking piece abuts against the inner wall of the conical groove, and the inner wall of the wedge-shaped locking piece abuts against the outer wall of the anchor rod body.

[0014] By adopting the above technical solution, the outer wall of the wedge-shaped locking plate abuts against the inner wall of the conical groove. When the locking nut is tightened, the wedge-shaped locking plate is inserted into the conical groove. Due to the characteristics of the wedge structure, a radial clamping force is generated, which makes the wedge-shaped locking plate tightly hold the anchor rod body, thereby realizing the mechanical self-locking function. Even under long-term dynamic loads such as vibration and impact, this mechanical self-locking structure can effectively prevent the nut from loosening, greatly improving the reliability of the anchor rod system.

[0015] As a preferred technical solution of this application, the interior of the anchor bolt hole is filled with concrete mortar between the inner wall of the anchor bolt hole and the outer wall of the self-locking anchor bolt.

[0016] By adopting the above technical solution, the self-locking anchor rod and the surrounding soil and rock can be integrated into a whole, increasing the bonding force and friction between the self-locking anchor rod and the soil and rock, and improving the anchoring effect and bearing capacity of the self-locking anchor rod.

[0017] As a preferred technical solution of this application, the self-locking anchor rod, fixing nut, locking nut and wedge locking plate are all made of alloy structural steel.

[0018] By adopting the above technical solutions, alloy structural steel has high strength, high toughness, and good wear resistance and corrosion resistance. The use of alloy structural steel materials can ensure that the anchor system will not deform or break during long-term use, thus ensuring the safety and stability of the project.

[0019] In summary, the beneficial effects of this application are as follows: 1. In this application, anchor holes are provided for placing self-locking anchors. By tightening the fixing nut to make it fit tightly against the anchor pad, the preload is transferred to the ground at the construction site through the anchor pad, thus completing the foundation fastening of the self-locking anchor. When tightening the locking nut, the wedge-shaped locking plate on its lower end face is gradually inserted into the conical groove on the upper end face of the fixing nut. The inclined surface of the wedge-shaped locking plate and the inclined surface of the conical groove are pressed against each other. The expansion joint provides space for the radial contraction of the wedge-shaped locking plate. As the locking nut is tightened, the compressive force is converted into radial clamping force along the inclined surface, causing the wedge-shaped locking plate to contract towards the center, thereby tightly holding the self-locking anchor and forming a stronger mechanical engagement. Even under long-term dynamic loads such as vibration and impact, this mechanical self-locking structure can effectively prevent the nut from loosening, greatly improving the reliability of the anchor system.

[0020] 2. In this application, a tool is used to tighten the clamping rod, so that one end of it presses against the self-locking anchor rod, thereby increasing the friction between the locking nut and the self-locking anchor rod, preventing the locking nut from rotating and loosening, and further enhancing the locking effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a frontal sectional view of this application; Figure 3 This is a schematic diagram of the connection structure of the self-locking anchor rod of this application; Figure 4 This is a schematic diagram of the composition of the self-locking anchor bolt of this application; Figure 5 This is a partial structural diagram of this application; Figure 6 This is a schematic diagram of the locking nut of this application.

[0022] Explanation of reference numerals in the attached figures: 1. Construction site ground; 2. Anchor bolt hole; 3. Self-locking anchor bolt; 31. Anchor bolt body; 32. Anchor bolt head; 33. Sleeve; 34. Outer expansion part; 4. Anchor bolt pad; 5. Fixing nut; 6. Locking nut; 7. Conical groove; 8. Wedge locking plate; 9. Expansion joint; 10. Threaded hole; 11. Anti-locking rod; 12. Internal hexagonal hole. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this application easy to understand, the following describes this application in conjunction with specific implementation methods.

[0024] like Figure 1 - Figure 6As shown in the figure, this embodiment provides a high-strength self-locking anchor nut with multi-stage wedge-shaped locking plates, including a self-locking anchor 3 that is slidably inserted into an anchor hole 2 drilled inside the ground 1 of the construction site. An anchor pad 4 is slidably sleeved on the outer wall of the self-locking anchor 3 near the upper end. A fixing nut 5 and a locking nut 6 are threadedly sleeved on the outer wall of the self-locking anchor 3 above the anchor pad 4 from bottom to top. A conical groove 7 is formed on the upper end face of the fixing nut 5. Several wedge-shaped locking plates 8 are fixedly connected to the lower end face of the locking nut 6 in a circumferential array. An expansion joint 9 is provided between any two adjacent wedge-shaped locking plates 8. The wedge-shaped locking plates 8 are slidably inserted into the interior of the conical groove 7. In use, an anchor hole 2 is first drilled in the ground 1 of the construction site using a drilling device to place the self-locking anchor 3. The anchor nut 3 is then tightened. The nut 5 is tightened to fit tightly against the anchor plate 4, thereby transferring the preload to the ground 1 of the construction site through the anchor plate 4, completing the foundation tightening of the self-locking anchor 3. When tightening the locking nut 6, the wedge-shaped locking plate 8 on its lower end face is gradually inserted into the conical groove 7 on the upper end face of the nut 5, so that the inclined surface of the wedge-shaped locking plate 8 and the inclined surface of the conical groove 7 are pressed against each other. The expansion joint 9 provides space for the radial contraction of the wedge-shaped locking plate 8. As the locking nut 6 is tightened, the compressive force is converted into radial clamping force along the inclined surface, causing the wedge-shaped locking plate 8 to contract towards the center, thereby tightly holding the self-locking anchor 3 and forming a stronger mechanical engagement. Even under long-term dynamic loads such as vibration and impact, this mechanical self-locking structure can effectively prevent the nut from loosening, greatly improving the reliability of the anchor system.

[0025] In this embodiment, as Figure 1 , 2 As shown in Figure 6, two threaded holes 10 are symmetrically opened on both sides of the outer wall of the locking nut 6. A retaining rod 11 is threaded into the interior of each of the two threaded holes 10. The outer end of the retaining rod 11 is provided with an internal hexagonal hole 12. In use, the retaining rod 11 is turned with a tool so that one end of it presses against the self-locking anchor rod 3, thereby increasing the friction between the locking nut 6 and the self-locking anchor rod 3, preventing the locking nut 6 from rotating and loosening, and further enhancing the locking effect.

[0026] In this embodiment, as Figure 2 , 3As shown in Figure 4, the self-locking anchor bolt 3 includes an anchor bolt body 31, with an anchor bolt head 32 fixedly connected to the lower end of the anchor bolt body 31. The anchor bolt head 32 has a tapered structure design with its diameter increasing from top to bottom. A sleeve 33 is slidably sleeved on the outer wall of the anchor bolt body 31. The lower end of the sleeve 33 is provided with an outward expansion part 34 that works with the anchor bolt head 32. In use, a force is applied to the sleeve 33 using a professional tool to move it downward. During the downward movement, the outward expansion part 34 at the lower end of the sleeve 33 contacts the anchor bolt head 32 and expands outward under its action, generating a squeezing effect on the rock and soil around the anchor bolt hole 2, thereby realizing the self-locking function of the self-locking anchor bolt 3 and improving the stability of the self-locking anchor bolt 3.

[0027] In this embodiment, as Figure 3 , 4 As shown in Figure 5, the outer wall of the anchor body 31 is provided with connecting threads. The fixing nut 5, the locking nut 6 and the wedge locking plate 8 are all provided with threaded grooves that mesh with the connecting threads. In use, this threaded fit design can ensure that the fixing nut 5 and the locking nut 6 are easy to install and remove on the anchor body 31.

[0028] In this embodiment, as Figure 3 and 5 As shown, the outer wall of the wedge-shaped locking piece 8 abuts against the inner wall of the conical groove 7, and the inner wall of the wedge-shaped locking piece 8 abuts against the outer wall of the anchor rod body 31. In use, the outer wall of the wedge-shaped locking piece 8 abuts against the inner wall of the conical groove 7. When the locking nut 6 is tightened, the wedge-shaped locking piece 8 is inserted into the conical groove 7. Due to the characteristics of the wedge structure, a radial clamping force is generated, which makes the wedge-shaped locking piece 8 tightly hold the anchor rod body 31, thereby realizing the mechanical self-locking function. Even under long-term dynamic loads such as vibration and impact, this mechanical self-locking structure can effectively prevent the nut from loosening, which greatly improves the reliability of the anchor rod system.

[0029] In this embodiment, as Figure 2 As shown, the interior of the anchor hole 2 is filled with concrete mortar between the inner wall of the anchor hole 2 and the outer wall of the self-locking anchor 3. During use, this allows the self-locking anchor 3 to form a whole with the surrounding soil and rock, increasing the bonding force and friction between the self-locking anchor 3 and the soil and rock, and improving the anchoring effect and bearing capacity of the self-locking anchor 3.

[0030] In this embodiment, as Figure 3 and 6 As shown, the self-locking anchor bolt 3, fixing nut 5, locking nut 6, and wedge locking plate 8 are all made of alloy structural steel. When in use, alloy structural steel has high strength, high toughness, and good wear resistance and corrosion resistance. Using alloy structural steel can ensure that the anchor bolt system will not deform or break during long-term use, thus ensuring the safety and stability of the project.

[0031] Working principle: When using the high-strength self-locking anchor nut with multi-stage wedge locking plates of this application, firstly, use drilling equipment to drill anchor holes 2 on the ground 1 of the construction site. After drilling, clean the rock powder and debris inside the anchor hole 2 to ensure the hole wall is clean. Then, insert the self-locking anchor 3 into the anchor hole 2, and use professional tools to apply force to the sleeve 33 to move it downwards, so that the outward expansion part 34 at the lower end of the sleeve 33 contacts the anchor head 32 and expands outwards under its action to fit tightly against the inner wall of the anchor hole 2. Then, use grouting equipment to pour concrete mortar into the anchor hole 2 to ensure that the mortar fills the inner wall of the anchor hole 2. After the concrete mortar has solidified, the gap between the anchor plate 4 and the outer wall of the self-locking anchor 3 is filled. The anchor plate 4 is then slidably fitted onto the exposed part of the self-locking anchor 3, so that the lower surface of the anchor plate 4 is tightly attached to the ground 1 of the construction site. Then, the fixing nut 5 is threaded onto the anchor body 31, and the fixing nut 5 is tightened with a wrench to make it tightly attached to the anchor plate 4. Then, the locking nut 6 is tightened, so that the wedge-shaped locking piece 8 on its lower end face is gradually inserted into the conical groove 7 on the upper end face of the fixing nut 5 to form a mechanical locking structure. After the locking nut 6 is tightened, the abutment rod 11 is threaded into the threaded hole 10 on the outer wall of the locking nut 6, and the abutment rod 11 is tightened with an Allen wrench so that its inner end is tightly pressed against the outer wall of the anchor body 31, further increasing the friction between the locking nut 6 and the anchor body 31.

[0032] The present application has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on its spirit and principles, and these modifications and variations are also within the scope of the present application.

Claims

1. A high-strength self-locking anchor nut with multi-stage wedge-shaped locking plates, comprising a self-locking anchor (3) that slides into an anchor hole (2) opened inside the ground (1) of the construction site, characterized in that, An anchor pad (4) is slidably sleeved on the outer wall of the self-locking anchor (3) near the upper end. A fixing nut (5) and a locking nut (6) are threaded on the outer wall of the self-locking anchor (3) above the anchor pad (4) from bottom to top. A conical groove (7) is opened on the upper end face of the fixing nut (5). Several wedge-shaped locking pieces (8) are fixedly connected to the lower end face of the locking nut (6) in a circumferential array. An expansion joint (9) is provided between any two adjacent wedge-shaped locking pieces (8). The wedge-shaped locking pieces (8) are slidably inserted into the interior of the conical groove (7).

2. A high-strength self-locking anchor nut with multi-stage wedge-shaped locking plates according to claim 1, characterized in that, The locking nut (6) has two threaded holes (10) symmetrically opened on both sides of its outer wall. Each of the two threaded holes (10) has a locking rod (11) threaded into its interior. The outer end of the locking rod (11) has an internal hexagonal hole (12).

3. A high-strength self-locking anchor nut with multi-stage wedge-shaped locking plates according to claim 1, characterized in that, The self-locking anchor (3) includes an anchor body (31), and an anchor head (32) is fixedly connected to the lower end of the anchor body (31). The anchor head (32) has a tapered structure design and its diameter increases from top to bottom. A sleeve (33) is slidably sleeved on the outer wall of the anchor body (31). The lower end of the sleeve (33) is provided with an expansion part (34) that is used in conjunction with the anchor head (32).

4. A high-strength self-locking anchor nut with multi-stage wedge-shaped locking plates according to claim 3, characterized in that, The outer wall of the anchor body (31) is provided with connecting threads, and the fixing nut (5), locking nut (6) and wedge locking plate (8) are all provided with threaded grooves that mesh with the connecting threads.

5. A high-strength self-locking anchor nut with multi-stage wedge-shaped locking plates according to claim 4, characterized in that, The outer wall of the wedge-shaped locking piece (8) abuts against the inner wall of the conical groove (7), and the inner wall of the wedge-shaped locking piece (8) abuts against the outer wall of the anchor rod body (31).

6. A high-strength self-locking anchor nut with multi-stage wedge-shaped locking plates according to claim 1, characterized in that, The interior of the anchor hole (2) is filled with concrete mortar between the inner wall of the anchor hole (2) and the outer wall of the self-locking anchor (3).

7. A high-strength self-locking anchor nut with multi-stage wedge-shaped locking plates according to claim 1, characterized in that, The self-locking anchor (3), fixing nut (5), locking nut (6) and wedge locking plate (8) are all made of alloy structural steel.

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