Prestressed anchor rod

Abstract

The utility model relates to the technical field of rock mass anchoring and supporting, and provides a pre-stressed anchor rod which comprises an anchor rod, a first stirring tool bit, a second stirring tool bit and a round pipe, one end of the anchor rod is coaxially connected with a threaded rod through a connecting sleeve, and the first stirring tool bit and the second stirring tool bit are arranged on the outer sides of the two ends of the round pipe in a sleeved mode respectively. An anchoring agent cartridge is placed in the round pipe, the first stirring tool bit is coaxially connected with the threaded rod, tool teeth used for rotationally cutting and stirring the round pipe and the anchoring agent cartridge are arranged in the first stirring tool bit, the anchoring agent cartridge is placed in the round pipe, and the first stirring tool bit and the second stirring tool bit are arranged at the two ends of the round pipe in a sleeving mode correspondingly. And the cutter teeth are arranged in the first stirring cutter head to rotationally cut and stir the round pipe and the anchoring agent cartridge and mix the round pipe and the anchoring agent cartridge, so that the anchoring agent cartridge is prevented from sliding out of a hole with a large elevation angle, and the anchoring effect and the construction efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rock mass anchoring and supporting, in particular to a prestressed anchor rod. Background Art

[0002] Prestressed anchor rod is a device used for rock anchoring and support. It actively reinforces the rock mass by applying a certain pre-compression stress to the rock mass. In tunnel construction, resin anchor rolls are widely used to fix prestressed anchor rods. Resin anchor rolls are a special curing resin with good adhesion and corrosion resistance. They can effectively fix prestressed anchor rods and improve the anchoring effect and durability.

[0003] At present, the loading method of resin anchor rolls is usually: drilling, blowing resin anchor rolls, inserting anchor rods and stirring and fixing. However, in actual applications, when the elevation angle of the radial drilling of the tunnel is too large, the resin rolls are easy to slip out, resulting in complicated or impossible subsequent operations, affecting construction efficiency and prestressed anchor fixing effect. Utility Model Content

[0004] The utility model aims to provide a prestressed anchor rod, which solves the above technical problems, avoids the anchoring agent roll from sliding out of a hole with a large elevation angle, and improves the anchoring effect and construction efficiency.

[0005] The embodiment of the utility model is realized through the following technical scheme: a prestressed anchor rod, comprising an anchor rod, one end of which is coaxially connected to a threaded rod through a connecting sleeve, and also comprising a first stirring blade head, a second stirring blade head and a circular tube, the first stirring blade head and the second stirring blade head are respectively sleeved on the outer sides of both ends of the circular tube, an anchor roll is placed in the circular tube, the first stirring blade head is coaxially connected to the threaded rod, and the first stirring blade head is provided with blade teeth for rotating and cutting the stirring circular tube and the anchor roll.

[0006] Furthermore, a coaxially arranged stepped hole is provided in the first stirring blade head, which is divided into a large diameter section and a small diameter section. A round tube is sleeved in the large diameter section, and a threaded rod is sleeved in the small diameter section. The blade teeth are evenly distributed on the step surface of the stepped hole.

[0007] Furthermore, the number of the blade teeth is at least three, and the blade teeth are distributed in rotational symmetry with the rotation axis of the first stirring blade head as the center.

[0008] Furthermore, the ends of the first stirring blade head and the second stirring blade head connected to the circular tube are both serrated.

[0009] Furthermore, the anchor rod is sequentially connected with a slurry stopper, a spherical washer, an anchor plate and a locking anchor nut from one end of the anchor rod away from the threaded rod, and the locking anchor nut is threadedly connected to the anchor rod.

[0010] Furthermore, the round tube is a PVC tube.

[0011] The utility model has at least the following advantages and beneficial effects: by placing an anchor roll in a circular tube, and respectively arranging a first stirring blade head and a second stirring blade head at both ends of the circular tube, blade teeth are arranged in the first stirring blade head to rotatably cut and stir the circular tube and the anchor roll, and mix them, thereby preventing the anchor roll from slipping out of a hole with a large elevation angle, thereby improving the anchoring effect and construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 A schematic diagram of the structure of a prestressed anchor rod provided by the utility model;

[0014] Figure 2 A cross-sectional view of a prestressed anchor rod provided by the utility model;

[0015] Figure 3 A schematic diagram of the structure of a first stirring blade in a prestressed anchor provided by the utility model;

[0016] Figure 4 A cross-sectional view of a first stirring blade in a prestressed anchor provided by the utility model;

[0017] Figure 5 A side view of a first stirring blade in a prestressed anchor provided by the utility model;

[0018] Icons: 1-anchor rod, 2-threaded rod, 3-first mixing blade, 30-step hole, 301-large diameter section, 302-small diameter section, 31-tooth, 4-second mixing blade, 5-round tube, 6-anchor agent roll, 7-slurry stop plug, 8-spherical washer, 9-anchor plate, 10-anchor nut, 11-connecting sleeve. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example

[0022] like Figure 1-5 As shown, in this embodiment, a prestressed anchor rod is mainly disclosed, which has a simple and reliable structure, can effectively simplify the construction steps, and prevent the anchoring agent roll 6 from slipping out of a hole with a larger elevation angle. Its main structure includes an anchor rod 1, a threaded rod 2, a first stirring blade head 3, a second stirring blade head 4 and a round tube 5. One end of the anchor rod 1 is coaxially connected to the threaded rod 2 through a connecting sleeve 11. The threaded rod 2 can be made of threaded steel. The connecting sleeve 11 adopts the existing technology and is a sleeve-shaped part with an internal thread. One end of the threaded rod 2 is threadedly connected to the anchor rod 1, and the other end is threadedly connected to the threaded rod 2. The first stirring blade head 3 and the second stirring blade head 4 are respectively sleeved on the outer sides of the two ends of the round tube 5 to form a relative loading space in the round tube 5. The round tube 5 can be a PVC tube. Anchoring agent roll 6 is placed in the round tube 5, that is, the anchoring agent roll 6 is placed in the above-mentioned loading space, and the first stirring blade head 3 and the threaded rod 2 are connected. The threaded rod 2 is coaxially connected, so that the anchor rod 1, the threaded rod 2, the first stirring blade head 3, the second stirring blade head 4 and the circular tube 5 are all coaxially arranged. The first stirring blade head 3 is provided with a blade tooth 31 for rotating, cutting and stirring the circular tube 5 and the anchoring agent roll 6. It should be noted that the anchoring agent roll 6 is usually cylindrical, wrapped with a protective coat on the outside, and contains an anchoring agent. The anchor rod 1 is driven to rotate and advance, and the threaded rod 2 is driven to rotate, so that the rotating blade teeth 31 of the first stirring blade head 3 destroy the protective coat, and then the anchoring agent in the anchoring agent roll 6 is rotated and stirred. At the same time, the blade teeth 31 gradually cut the end of the circular tube 5 into fragments and mix the fragments with the anchoring agent until the first stirring blade head 3 contacts the second stirring blade head 4 and the stirring is stopped. This can effectively prevent the delivered anchoring agent roll 6 from slipping out of the hole with a larger elevation angle, thereby improving the anchoring effect and construction efficiency.

[0023] Furthermore, in the specific implementation, if Figure 4 As shown, the first stirring blade head 3 provided in the embodiment of the utility model is provided with a coaxially arranged stepped hole 30, which is divided into a large diameter section 301 and a small diameter section 302, and the transition surface between the large diameter section 301 and the small diameter section 302 is a stepped surface, a round tube 5 is sleeved in the large diameter section 301, and a threaded rod 2 is sleeved in the small diameter section 302, and the blade teeth 31 are evenly distributed on the stepped surface of the stepped hole 30. In addition, the number of the blade teeth 31 includes at least three, and they are rotationally symmetrically distributed with the rotation axis of the first stirring blade head 3 as the center, so as to realize the rotational cutting and stirring of the round tube 5 and the anchor agent roll 6, thereby ensuring the uniformity and quality of the mixing.

[0024] Furthermore, in the specific implementation, if Figure 1 , Figure 3 , Figure 4 As shown, the ends of the first stirring blade head 3 and the second stirring blade head 4 provided in the embodiment of the utility model connected to the round tube 5 are both serrated, which can further crush the fragments of the round tube 5 so that they can be fully mixed with the anchor in the anchor roll 6.

[0025] Furthermore, in the specific implementation, if Figure 1 , Figure 2 As shown, the anchor rod 1 provided in the embodiment of the utility model is connected with a slurry stop plug 7, a spherical washer 8, an anchor plate 9 and a locking anchor nut 10 in sequence from the end away from the threaded rod 2. The locking anchor nut 10 is threadedly connected to the anchor rod 1. The slurry stop plug 7 is used to prevent the slurry from flowing out. The spherical washer 8 is tightly attached between the slurry stop plug 7 and the anchor plate 9 and is used to adjust the force so that the anchor plate 9 is as close to the drilling surface as possible. The anchor plate 9 is used to increase the force area. When in use, the locking anchor nut 10 is screwed to insert the slurry stop plug 7 into the opening, and the anchor plate 9 covers the opening to seal the opening to prevent the slurry in the hole from flowing out.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A prestressed anchor rod, comprising an anchor rod (1), one end of the anchor rod (1) being coaxially connected to a threaded rod (2) via a connecting sleeve (11), It is characterized in that The invention also comprises a first stirring blade head (3), a second stirring blade head (4) and a circular tube (5); the first stirring blade head (3) and the second stirring blade head (4) are respectively sleeved on the outer sides of both ends of the circular tube (5); an anchoring agent roll (6) is arranged inside the circular tube (5); the first stirring blade head (3) is coaxially connected to the threaded rod (2); and the first stirring blade head (3) is provided with blade teeth (31) for rotating, cutting and stirring the circular tube (5) and the anchoring agent roll (6).

2. A prestressed anchor rod as claimed in claim 1, It is characterized in that The first stirring blade head (3) is provided with a coaxially arranged stepped hole (30), which is divided into a large diameter section (301) and a small diameter section (302); the round tube (5) is sleeved in the large diameter section (301), and the threaded rod (2) is sleeved in the small diameter section (302); the blade teeth (31) are evenly distributed on the step surface of the stepped hole (30).

3. A prestressed anchor rod as claimed in claim 1 or 2, It is characterized in that The number of the blade teeth (31) is at least three, and they are distributed in rotational symmetry with the rotation axis of the first stirring blade head (3) as the center.

4. A prestressed anchor rod as claimed in claim 1, It is characterized in that The ends of the first stirring blade head (3) and the second stirring blade head (4) connected to the circular tube (5) are both serrated.

5. A prestressed anchor rod as claimed in claim 1, It is characterized in that The anchor rod (1) is sequentially connected with a grout stopper (7), a spherical washer (8), an anchor plate (9) and a locking anchor nut (10) from one end away from the threaded rod (2); the locking anchor nut (10) is threadedly connected to the anchor rod (1).

6. A prestressed anchor rod as claimed in claim 1, It is characterized in that The circular tube (5) is a PVC tube.

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