Anchor rod butt joint device based on glue pouring connection

Abstract

The utility model provides an anchor rod butt joint device based on glue pouring connection, which comprises a connecting sleeve, and a connecting threaded cavity and a butt joint insertion cavity which are coaxially arranged are arranged in the connecting sleeve; the connecting threaded cavity is in threaded connection with a connecting section at the end part of the steel bar anchor rod; the butt joint inserting cavity is connected with one end of a fiber anchor rod in an inserted mode, and the inner diameter of the butt joint inserting cavity is larger than the diameter of the fiber anchor rod so that a glue pouring cavity can be formed. An annular fastening clamping groove is formed in the side wall of the annular face of the fiber anchor rod. The connecting sleeve is provided with a fastening assembly penetrating in the radial direction, and the end of the fastening assembly can be clamped into the annular fastening clamping groove to lock the fiber anchor rod. According to the utility model, the fiber anchor rod is fixedly connected through the epoxy resin glue and the fastening assembly, so that the connection is firm and reliable; and through matched use of the connecting threaded cavities and the threaded connecting sections at the ends of the steel bar anchor rods, the steel bar anchor rod connecting device is convenient to mount and dismount, sectional transportation, field assembly and connection of the steel bar anchor rods with different lengths are facilitated, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of anchoring technology, specifically to an anchor bolt docking device based on glue-filled connection. Background Technology

[0002] In the field of geotechnical engineering anchoring, anchor bolts are the core components for rock mass reinforcement. Reinforced steel anchor bolts are widely used due to their high strength and shear resistance, but they suffer from severe corrosion in humid, saline-alkali, or chemically corrosive environments, leading to a significant shortening of the anchoring system's lifespan. Fiber-reinforced composite material anchor bolts (such as glass fiber and basalt fiber anchor bolts) offer advantages such as lightweight, high strength, corrosion resistance, and fatigue resistance, making them particularly suitable for permanent projects or corrosive environments. However, their lower elastic modulus and smooth surface make reliable connection with traditional reinforced steel anchor bolts a persistent technical bottleneck.

[0003] The heterogeneous anchor connection schemes currently being tested in this project have significant drawbacks: pure glue-filled connections rely on the adhesive strength of epoxy resin, but the inertness of the fiber anchor surface leads to insufficient bond strength at the glue-reinforcement interface, making them prone to debonding failure under long-term loads; mechanical compression connections apply radial pressure to the fiber anchor, which can easily cause brittle damage and significantly reduce its tensile strength; threaded sleeve connections require machining threads on the surface of the fiber anchor, which disrupts the continuous fiber structure, creates stress concentration points, and accelerates the fracture of the anchor.

[0004] None of the above methods can simultaneously meet the following core requirements: achieving high-strength mechanical transfer between steel anchors and fiber anchors; protecting the integrity of fiber anchors and avoiding strength reduction at the connection; and providing a flexible construction solution that is detachable and adjustable on-site. Therefore, there is an urgent need to develop a dedicated docking device that can synergistically leverage the advantages of both types of anchors and possesses high reliability and ease of construction. Utility Model Content

[0005] The purpose of this invention is to provide an anchor bolt docking device based on glue-filled connection to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An anchor bolt docking device based on glue-filled connection includes a connecting sleeve. The connecting sleeve has a coaxially arranged connecting threaded cavity and a docking cavity. The connecting threaded cavity is threadedly connected to the connecting section at the end of the reinforcing bar anchor bolt. The docking cavity is inserted into one end of the fiber anchor bolt, and the inner diameter of the docking cavity is larger than the diameter of the fiber anchor bolt to form a glue-filled cavity. The annular sidewall of the fiber anchor bolt has an annular fastening groove. The connecting sleeve has a radially penetrating fastening component, the end of which can be engaged into the annular fastening groove to lock the fiber anchor bolt.

[0008] Furthermore, the fastening assembly includes: threaded through grooves equidistantly formed on the side wall of the connecting sleeve, the threaded through grooves communicating with the mating cavity; a fastening screw threadedly engaged with the threaded through grooves; and an operating part disposed at the outer end of the fastening screw.

[0009] Furthermore, the inner end of the fastening screw is tapered or hemispherical, and is adapted to engage with the shape of the annular fastening groove.

[0010] Furthermore, the cavity opening end of the docking cavity is provided with a mounting screw groove for fixing the sealing component.

[0011] Furthermore, the sealing assembly is detachably connected to the cavity opening end of the mating cavity. The sealing assembly includes: a sealing ring body inserted into the mating cavity; a connecting retainer ring fixed to the end of the sealing ring body, the connecting retainer ring being connected to the mounting screw groove via a positioning screw; at least one adhesive inlet / outlet penetrating the sealing ring body; and a sealing plug for sealing the adhesive inlet / outlet.

[0012] Furthermore, the adhesive liquid inlet and outlet are symmetrically arranged in two places.

[0013] As can be seen from the above technical solutions, the anchor bolt docking device based on glue-filled connection designed in this utility model fully utilizes the material performance advantages of epoxy resin glue and fastening components to fix and connect fiber anchor bolts, ensuring a firm and reliable connection. By using the connection threaded cavity in conjunction with the threaded connection section at the end of the steel anchor bolt, it facilitates installation and disassembly, making it convenient for segmented transportation, on-site assembly, and connection of steel anchor bolts of different lengths, thereby improving construction efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the left side of the exploded connection of the anchor bolt docking device of this utility model;

[0015] Figure 2 for Figure 1 Enlarged schematic diagram of the structural connection at point A in the middle;

[0016] Figure 3 This is a schematic diagram of the right side of the exploded connection of the anchor bolt docking device of this utility model;

[0017] Figure 4 for Figure 3 Enlarged schematic diagram of the structural connection at point B;

[0018] Figure 5 This is a schematic diagram showing the connection between the connecting sleeve and the sealing assembly of this utility model;

[0019] In the diagram: 1. Connecting sleeve; 11. Connecting threaded cavity; 12. Butt joint cavity; 13. Installation threaded groove; 2. Rebar anchor rod; 21. Connecting section; 3. Fiber anchor rod; 31. Fastening slot; 401. Threaded through groove; 402. Fastening screw; 403. Operating part; 501. Sealing ring body; 502. Connecting ring; 503. Positioning screw; 504. Adhesive inlet and outlet; 505. Sealing body. Detailed Implementation

[0020] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figure 1-5 The anchor bolt docking device based on glue-filled connection shown includes a connecting sleeve 1, which has a coaxially arranged connecting threaded cavity 11 and a docking cavity 12. The connecting threaded cavity 11 is threadedly connected to the connecting section 21 at the end of the steel anchor bolt 2. The docking cavity 12 is inserted into one end of the fiber anchor bolt 3, and the inner diameter of the docking cavity 12 is larger than the diameter of the fiber anchor bolt 3 (the diameter difference is preferably 0.5-2mm) to form a glue-filled cavity. The annular sidewall of the fiber anchor bolt 3 is provided with a wound annular fastening groove 31, which is set as an annular groove. The connecting sleeve 1 is provided with a radially penetrating fastening component, the end of which can be inserted into the annular fastening groove 31 to lock the fiber anchor bolt 3.

[0022] like Figure 1 As shown, for the docking work of the steel anchor rod 2 and the connecting sleeve 1, the threaded connection section 21 at the end of the steel anchor rod 2 is threadedly connected to the connecting threaded cavity 11 in the connecting sleeve 1, so as to realize the quick docking work of the steel anchor rod 2 and the connecting sleeve 1. The operation is convenient, and it is easy to transport in sections, assemble on site, and connect steel anchor rods of different lengths, which has good working flexibility.

[0023] The fastening assembly described in this preferred embodiment includes: threaded through grooves 401 equidistantly formed on the side wall of the connecting sleeve 1, the threaded through grooves 401 communicating with the mating cavity 12; a fastening screw 402 threadedly engaged with the threaded through grooves 401; and an operating part 403 located at the outer end of the fastening screw 402; the inner end of the fastening screw 402 is conical or hemispherical, conforming to the curved surface of the annular fastening groove 31 to achieve stress diffusion and avoid local crushing of fibers.

[0024] For the docking of the fiber anchor rod 3 and the connecting sleeve 1, the cavity end of the docking cavity 12 is provided with a mounting screw groove 13 for fixing the sealing assembly. The sealing assembly is detachably connected to the cavity end of the docking cavity 12. The sealing assembly includes: a sealing ring body 501 inserted into the docking cavity 12; a connecting retainer 502 fixed to the end of the sealing ring body 501, the connecting retainer 502 being connected to the mounting screw groove 13 by a positioning screw 503; two symmetrically arranged adhesive inlets and outlets 504 penetrating the sealing ring body 501; and a sealing plug 505 for sealing the adhesive inlets and outlets 504.

[0025] In practice, the anchor bolt connection operation is carried out in five stages:

[0026] First stage: Screw the threaded connection section 21 of the steel anchor rod 2 into the threaded cavity 11 until the end face abuts the bottom of the cavity;

[0027] Second stage: Insert the sealing ring 501 into the mating cavity 12 until the connecting ring 502 contacts the opening of the connecting sleeve 1, and then use the positioning screw 503 to fix the connecting ring 502.

[0028] The third stage: Insert the fiber anchor rod 3 into the inner side of the sealing ring 501 until the end of the fiber anchor rod 3 contacts the end of the steel anchor rod 2. At the same time, rotate the fiber anchor rod 3 so that its annular fastening groove 31 aligns with the threaded through groove 401. Then, the positioning screw 503 is used to lock the fastening groove 31 to achieve the positioning of the fiber anchor rod 3. The threaded through groove 401 in the fastening assembly is equidistantly arranged in the connecting sleeve 1, and the threaded through groove 401 is connected to the docking cavity 12. The threaded through groove 401 is threadedly connected to the fastening screw 402, and an operating part 403 is fixedly provided at one end of the fastening screw 402. The threaded through groove 401 and the fastening groove 31 on the fiber anchor rod 3 are positioned correspondingly, and the end of the fastening screw 402 is fitted and locked with the fastening groove 31. Radial mechanical locking is completed.

[0029] Fourth stage: When the fiber anchor 3 is inserted into the docking cavity 12 through the sealing ring 501, an epoxy resin cavity is formed between the outer wall of the fiber anchor 3 and the inner wall of the docking cavity 12. In order to further improve the docking firmness of the fiber anchor 3, epoxy resin is injected into one of the glue inlet / outlet 504. When the glue overflows from the other glue inlet / outlet 504, the injection can be stopped. Then, the two glue inlets / outlets 504 are sealed by the sealing ring 505. The lower glue inlet is the glue inlet, and the upper glue inlet also serves as an exhaust channel to ensure that the glue filling cavity is free of air gaps.

[0030] Fifth stage: Let stand until the epoxy resin cures (usually ≥24h) to form a dual anchoring system of mechanical locking and adhesive bonding.

[0031] During disassembly: First, unscrew the fastening screw 402 to release the mechanical lock, then heat to 80℃ to soften the epoxy resin adhesive, and then pull out the fiber anchor rod 3. Subsequently, the steel anchor rod 2 can be directly unscrewed out.

[0032] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An anchor bolt docking device based on glue-filled connection, characterized in that, include: A connecting sleeve (1) is provided with a connecting thread cavity (11) and a mating cavity (12) arranged coaxially. The connecting threaded cavity (11) is threadedly connected to the connecting section (21) at the end of the steel anchor rod (2); The docking cavity (12) is inserted into one end of the fiber anchor rod (3), and the inner diameter of the docking cavity (12) is larger than the diameter of the fiber anchor rod (3) to form a glue-filling cavity; The fiber anchor (3) has an annular fastening groove (31) on its annular sidewall; The connecting sleeve (1) is provided with a radially penetrating fastening component, the end of which can be engaged in the annular fastening groove (31) to lock the fiber anchor rod (3).

2. The anchor bolt docking device according to claim 1, characterized in that, The fastening assembly includes: Threaded through grooves (401) are equidistantly opened on the side wall of the connecting sleeve (1), and the threaded through grooves (401) are connected to the mating cavity (12); A fastening screw (402) that mates with the threaded through groove (401); An operating part (403) is provided at the outer end of the fastening screw (402).

3. The anchor bolt docking device according to claim 2, characterized in that, The inner end of the fastening screw (402) is tapered or hemispherical and is adapted to the shape of the annular fastening groove (31) for engagement.

4. The anchor bolt docking device according to claim 1, characterized in that, The cavity end of the docking cavity (12) is provided with a mounting screw groove (13) for fixing the sealing component.

5. The anchor bolt docking device according to claim 4, characterized in that, The sealing assembly is detachably connected to the cavity opening of the mating cavity (12), and the sealing assembly includes: The sealing ring (501) is inserted into the docking cavity (12); A connecting ring (502) is fixed to the end of the sealing ring body (501), and the connecting ring (502) is connected to the mounting screw groove (13) by a positioning screw (503); At least one adhesive inlet / outlet (504) penetrating the sealing ring (501); A sealing plug (505) for use as a sealant inlet / outlet (504).

6. The anchor bolt docking device according to claim 5, characterized in that, The adhesive inlet and outlet (504) are symmetrically arranged in two places.

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