A reinforced anchor bolt

Abstract

This invention discloses a reinforced anchor bolt, comprising an outer sleeve, an inner rod slidably connected within the outer sleeve, one end of the inner rod protruding to the outside of the outer sleeve, the inner rod being a tubular structure, and a screw rotatably connected within the outer sleeve, the screw being threadedly connected to the inner rod. When the screw rotates, the inner rod slides out from the outer sleeve, thereby changing the overall length of the anchor bolt. Compared with the prior art, the advantages of this invention are: the invention has a simple structure, and the relative positional relationship between the inner rod and the outer sleeve can be adjusted by rotating the screw, thereby adjusting the overall length of the anchor bolt. Targeted adjustments can be made according to different anchoring depth requirements, significantly improving the applicability of the device.

Description

Technical Field

[0001] This invention relates to an anchor bolt, specifically a reinforced anchor bolt. Background Technology

[0002] In engineering construction such as soil and rock reinforcement and tunnel support, anchor bolts are commonly used reinforcement components. Their main function is to connect the soil and rock mass with the support structure to improve overall stability. Currently, most anchor bolts in existing technology are fixed-length structures, which cannot be flexibly adjusted according to the anchoring depth requirements in actual construction. This results in a single specification of anchor bolt being only suitable for a single anchoring depth, limiting its applicability and causing many inconveniences in construction.

[0003] Meanwhile, some adjustable length anchors have complex structural designs and are cumbersome to operate, making them difficult for on-site construction personnel to operate quickly. Furthermore, their stability after adjustment is poor, making it difficult to meet the reinforcement requirements of actual projects. Summary of the Invention

[0004] The purpose of this invention is to provide a reinforced anchor bolt to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A reinforced anchor bolt includes an outer sleeve, an inner rod slidably connected inside the outer sleeve, one end of the inner rod protruding to the outside of the outer sleeve, the inner rod being a tubular structure, and a screw rod rotatably connected inside the outer sleeve, the screw rod being threadedly connected to the inner rod, the inner rod sliding out from the outer sleeve when the screw rod rotates, thereby changing the overall length of the anchor bolt.

[0006] As a further aspect of the present invention, a fixed end is fixedly connected to the end of the inner rod.

[0007] As a further embodiment of the present invention, the fixed end is a ratchet structure.

[0008] As a further embodiment of the present invention: a guide strip is provided on the outer side of the inner rod, the guide strip is aligned with the axial direction of the inner rod, and a guide groove is provided inside the outer sleeve that matches the cross-sectional shape of the guide strip, and the guide strip and the guide groove are slidably engaged.

[0009] As a further embodiment of the present invention: the guide strip is provided with several arc-shaped grooves, and several protruding rods are slidably connected to the side wall of the outer sleeve. The protruding rods abut against the surface of the guide strip. When the inner rod slides to the anchoring position, the protruding rods are exposed to the outside of the outer sleeve under the pressure of the guide strip.

[0010] As a further embodiment of the present invention: both the outer sleeve and the inner rod have through holes for the slurry to flow out.

[0011] As a further aspect of the present invention, the outer sleeve is provided with grouting holes for grouting.

[0012] As a further embodiment of the present invention: the outer sleeve is fitted with an anti-backflow umbrella-shaped rubber ring to prevent slurry from flowing out.

[0013] As a further embodiment of the present invention: a pad is provided on the outer side of the outer sleeve, and a locking bolt that restricts the position of the pad is threadedly connected to the outer side of the outer sleeve.

[0014] As a further aspect of the present invention, both the outer sleeve and the inner rod are made of stainless steel.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a simple structure, and the relative positional relationship between the inner rod and the outer sleeve can be adjusted by rotating the screw, thereby adjusting the overall length of the anchor rod. It can be adjusted in a targeted manner according to different anchoring depth requirements, which significantly improves the applicability of the device. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a reinforced anchor bolt.

[0017] Figure 2 This is a schematic diagram of the inner rod in a reinforced anchor bolt.

[0018] Figure 3 This is a cross-sectional view of a reinforced anchor bolt.

[0019] In the diagram: 1. Outer sleeve; 2. Inner rod; 3. Screw; 4. Fixed end; 5. Guide strip; 6. Arc-shaped groove; 7. Protruding rod; 8. Through hole; 9. Grouting hole; 10. Anti-backflow umbrella-shaped rubber ring; 11. Pad; 12. Locking bolt. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Please refer to the attached diagram. A reinforced anchor bolt consists of an outer sleeve 1 and an inner rod 2, both made of stainless steel. This effectively prevents moisture corrosion, extends the service life of the anchor bolt, and reduces subsequent maintenance costs. The inner rod 2 is slidably connected inside the outer sleeve 1, with one end exposed outside the outer sleeve 1. The inner rod 2 is designed with a tubular structure, which reduces the overall weight of the anchor bolt and facilitates subsequent grouting operations, allowing the grout to better penetrate the anchoring area.

[0025] To allow for adjustment of the overall length of the anchor bolt and adapt to different anchoring depths, a screw rod 3 is rotatably connected inside the outer sleeve 1. The screw rod 3 is threadedly connected to the inner rod 2. In actual use, workers only need to rotate the screw rod 3 to cause the inner rod 2 to slide within the outer sleeve 1, thereby adjusting the overall length of the anchor bolt to meet the depth requirements of different construction scenarios. The operation is simple and easy to implement.

[0026] At the exposed end of the inner rod 2, a fixed end 4 is fixedly connected. This fixed end 4 adopts a ratchet-type structure. The advantage of this structure is that after the anchor rod is anchored in place, multiple anchoring units each provide their corresponding anchoring effect, ensuring the overall stability of the anchoring and preventing the anchor rod from loosening after construction, which would affect the reinforcement effect. This structure is also suitable for complex soil and rock stress environments on site. The fixed end 4 can also be set in other ways, such as fixing rods evenly distributed at the end of the inner rod 2, with the fixing rods set perpendicular to the inner rod 2, thereby providing sufficient anchoring force. When the fixed end 4 is not set at the end of the inner rod 2, rotating the screw 3 can also completely retract the inner rod 2 into the outer sleeve 1, thus facilitating storage.

[0027] To ensure the inner rod 2 does not rotate while sliding within the outer sleeve 1 and to guarantee precise length adjustment, a guide strip 5 is provided on the outer side of the inner rod 2, with the guide strip 5 aligned with the axial direction of the inner rod 2. Correspondingly, a guide groove is formed inside the outer sleeve 1, with its cross-sectional shape perfectly matching that of the guide strip 5. The guide strip 5 slides smoothly with the guide groove, guiding the inner rod 2 to slide smoothly while restricting its rotation, ensuring operational accuracy during construction. The guide strip 5 has a circular or square cross-section. In this embodiment, the guide strip 5 has a semi-circular cross-section. Several guide strips 5 are provided as needed, evenly distributed on the outer side of the inner rod 2. In the illustrated state, two guide strips 5 are provided, located on either side of the inner rod 2.

[0028] Several arc-shaped grooves 6 are formed on the guide strip 5, while several protruding rods 7 are slidably connected to the side wall of the outer sleeve 1. The protruding rods 7 are always in contact with the surface of the guide strip 5. When the inner rod 2 slides to the preset anchoring position, the protruding rods 7 are squeezed by the arc-shaped grooves 6 on the guide strip 5 and thus exposed to the outside of the outer sleeve 1. In this way, the protruding structure of the protruding rods 7 after grouting can further improve the anchoring effect. The positions of the arc-shaped grooves 6 and the protruding rods 7 can be set in a one-to-one correspondence, that is, the protruding rods 7 will be pushed out simultaneously during the process of cooperating with the arc-shaped grooves 6. Alternatively, a staggered correspondence can be set, that is, when the arc-shaped grooves 6 move, they cooperate with some of the protruding rods 7, and the specific protruding rods 7 can be adjusted to be in the pushed-out state according to the anchoring requirements of the protruding rods 7.

[0029] To achieve grouting reinforcement and better bond between the anchor rod and the soil, through holes 8 are provided on the surfaces of both the outer sleeve 1 and the inner rod 2. These through holes 8 allow grout to flow out, enabling the grout to evenly penetrate into the soil-rock fissures around the anchor rod, enhancing the bond between the anchor rod and the soil, and improving the reinforcement effect. Simultaneously, the outer sleeve 1 is also equipped with grouting holes 9. During grouting, connecting the grouting pipe to the grouting holes 9 allows grout to be injected into the anchor rod, making the operation convenient and meeting the actual needs of on-site grouting construction.

[0030] An anti-backflow umbrella-shaped rubber ring 10 is fitted on the outside of the outer sleeve 1. Its main function is to prevent the injected grout from flowing back, ensuring that all the grout remains in the anchoring area, avoiding grout waste and reduced anchoring effect, and ensuring that the grout does not flow out before curing. Especially when anchoring the anchor rod in an upward inclined position, if the anti-backflow umbrella-shaped rubber ring 10 is not used, the grout will flow out and anchoring will not be possible. The anti-backflow umbrella-shaped rubber ring 10 is tightly attached to the outside of the outer sleeve 1 and is locked in position by its own elasticity. When it needs to be moved, the friction between the anti-backflow umbrella-shaped rubber ring 10 and the outer sleeve 1 is overcome by external force, thereby realizing position adjustment.

[0031] In addition, a pad 11 is fitted on the outer side of the outer sleeve 1, and a locking bolt 12 is threaded onto the outer side of the outer sleeve 1. The function of the locking bolt 12 is to restrict the position of the pad 11. The structure of the pad 11 and the locking bolt 12 is prior art and will not be described in detail here.

[0032] It should be noted that, during the anchoring construction, the outer side of the anchor bolt disclosed in this application can be wrapped with a fiber bushing to adapt to environments such as hollow masonry structures and to improve the applicability of the anchor bolt.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A reinforced anchor bolt, comprising an outer sleeve (1), characterized in that, An inner rod (2) is slidably connected inside the outer sleeve (1). One end of the inner rod (2) is exposed to the outside of the outer sleeve (1). The inner rod (2) is a tubular structure. A screw (3) is rotatably connected inside the outer sleeve (1). The screw (3) is threadedly connected to the inner rod (2). When the screw (3) rotates, the inner rod (2) slides out from inside the outer sleeve (1), thereby changing the overall length of the anchor rod.

2. The reinforced anchor bolt according to claim 1, characterized in that, The inner rod (2) is fixedly connected to a fixed end (4).

3. The reinforced anchor bolt according to claim 2, characterized in that, The fixed end (4) has a ratchet structure.

4. The reinforced anchor bolt according to claim 1, characterized in that, The inner rod (2) is provided with a guide strip (5) on the outside. The guide strip (5) is aligned with the axial direction of the inner rod (2). The outer sleeve (1) is provided with a guide groove that matches the cross-sectional shape of the guide strip (5). The guide strip (5) slides with the guide groove.

5. The reinforced anchor bolt according to claim 4, characterized in that, The guide strip (5) has several arc-shaped grooves (6), and the outer sleeve (1) has several protruding rods (7) slidably connected to the side wall. The protruding rods (7) abut against the surface of the guide strip (5). When the inner rod (2) slides to the anchoring position, the protruding rods (7) are exposed to the outside of the outer sleeve (1) under the pressure of the guide strip (5).

6. The reinforced anchor bolt according to claim 1, characterized in that, Both the outer sleeve (1) and the inner rod (2) have through holes (8) for supplying slurry outflow.

7. The reinforced anchor bolt according to claim 6, characterized in that, The outer sleeve (1) is provided with grouting holes (9) for grouting.

8. The reinforced anchor bolt according to claim 1, characterized in that, The outer sleeve (1) is fitted with an anti-backflow umbrella-shaped rubber ring (10) to prevent slurry from flowing back.

9. The reinforced anchor bolt according to claim 1, characterized in that, The outer sleeve (1) is fitted with a pad (11) on the outside, and a locking bolt (12) is threadedly connected to the outer sleeve (1) to limit the position of the pad (11).

10. The reinforced anchor bolt according to claim 1, characterized in that, Both the outer sleeve (1) and the inner rod (2) are made of stainless steel.

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