Built-in extrusion type resin cartridge anchor rod drill bit for tunnel

Abstract

A built-in extrusion type resin cartridge anchor rod drill bit for a tunnel is characterized in that a drill bit body is in bolting connection with a hollow anchor rod through threads in the hollow anchor rod, the drill bit body is provided with a slag discharging cutter and a reamer to remove slag in an anchor hole, and a slurry outlet hollow body is provided with a slurry outlet hole and a slag blocking net on the surface to ensure normal slurry outlet and prevent slag from entering a hole. The connecting sleeve is provided with an external thread matched with the thread of the hollow anchor rod, and a cross-shaped breaking knife is arranged on the surface of the connecting sleeve, so that an anchoring agent can be effectively broken open, and the effect of sufficient grout reaction anchoring is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel anchor bolt technology, specifically relating to a tunnel-embedded extrusion resin cartridge anchor bolt drill bit. Background Technology

[0002] In tunnel construction, anchor bolt support technology is used to reinforce weak surrounding rock sections. Anchor bolt support employs resin materials and hollow anchor bolts for end anchoring, followed by prestressing reinforcement. However, existing technologies for anchor bolts with embedded anchoring agents suffer from limitations in drilling, grout removal, and anchoring agent removal. Furthermore, some anchoring agents are not fully encapsulated or cut, preventing complete extrusion. Therefore, new technical solutions are needed to address these issues. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a tunnel-embedded extrusion resin cartridge anchor drill bit to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A tunnel-embedded extrusion resin cartridge anchor drill bit includes a drill bit body (1), characterized in that the drill bit body (1) is composed of a rotating part (4) and a connecting sleeve (10), the rotating part (4) is connected to the connecting sleeve (10), and the connecting sleeve (10) is provided with external threads and is connected to the hollow anchor (2) through threaded area matching.

[0006] The rotating part (4) consists of a main body, a slag removal knife (3), a rotating rod (5), and a reamer (6). The rotating part (4) is conical at the front end. Multiple slag removal knives (3) are arranged in a plum blossom pattern on the rotating part (4). The rotating rod (5) is connected to the reamer (6) at the rear of the rotating part (4) and then connected to the connecting sleeve (10).

[0007] The connecting sleeve (10) consists of a slurry outlet hollow body (7), a slag-blocking mesh (8), and a breaking knife (11). The upper part of the connecting sleeve (10) is the slurry outlet hollow body (7), which has a slurry outlet hole (9). A slag-blocking mesh (8) is provided outside the slurry outlet hole (9). The connecting sleeve (10) is provided with external threads, and the breaking knife (11) is fixed inside the connecting sleeve (10).

[0008] The reamer (6) is cross-shaped, with an outward bevel angle of about 135° on the outside.

[0009] The hollow body (7) on the connecting sleeve (10) is provided with multiple slurry outlet holes (9). The slurry outlet holes (9) are elliptical and have an upward angle of about 135°.

[0010] The cutting blade (11) is a cross-shaped sheet alloy blade, which is thin at one end and thick at the other, with the thick end being about 2mm.

[0011] The beneficial effects of this utility model are:

[0012] 1. By setting multiple teardrop-shaped cutting tools on the drill bit body and two rows of ten-shaped reamers on the rotating body, the stone debris inside the anchor hole can be quickly removed during the installation of hollow anchor bolts, achieving the goal of rapid and accurate installation of hollow anchor bolts with built-in anchoring agent.

[0013] 2. By setting slurry outlet holes and surface baffles in the hollow slurry outlet body, normal slurry outlet and prevention of slag from entering the hole are ensured. The connecting sleeve is set with external threads that match the threads of the hollow anchor rod, and a cross-shaped cutting blade is set on the surface, which can effectively break the anchoring agent and achieve a full slurry outlet reaction and anchoring effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the utility model.

[0015] Figure 2 This is a schematic diagram of the connection structure of the utility model.

[0016] Figure 3 This is a schematic diagram of a utility model cutting tool.

[0017] Among them, 1 is the drill bit body, 2 is the hollow anchor rod, 3 is the slag removal cutter, 4 is the rotating part, 5 is the rotating rod, 6 is the reamer, 7 is the slurry discharge hollow body, 8 is the slag retaining net, 9 is the slurry discharge hole, 10 is the connecting sleeve, and 11 is the breaking cutter. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1 , 2 As shown in Figure 3, a tunnel-embedded extrusion resin cartridge anchor drill bit includes a drill bit body (1). The drill bit body (1) is composed of a rotating part (4) and a connecting sleeve (10). The rotating part (4) is connected to the connecting sleeve (10). The connecting sleeve (10) is provided with external threads and is connected to the hollow anchor (2) through threaded area matching.

[0020] The rotating part (4) consists of a main body, a slag removal knife (3), a rotating rod (5), and a reamer (6). The rotating part (4) is conical at the front end. Multiple slag removal knives (3) are arranged in a plum blossom pattern on the rotating part (4). The rotating rod (5) is connected to the reamer (6) at the rear of the rotating part (4) and then connected to the connecting sleeve (10).

[0021] The connecting sleeve (10) consists of a slurry outlet hollow body (7), a slag-blocking mesh (8), and a breaking knife (11). The upper part of the connecting sleeve (10) is the slurry outlet hollow body (7), which has a slurry outlet hole (9). A slag-blocking mesh (8) is provided outside the slurry outlet hole (9). The connecting sleeve (10) is provided with external threads, and the breaking knife (11) is fixed inside the connecting sleeve (10).

[0022] The reamer (6) is cross-shaped, with an outward bevel angle of about 135° on the outside.

[0023] The hollow body (7) on the connecting sleeve (10) is provided with multiple slurry outlet holes (9). The slurry outlet holes (9) are elliptical and have an upward angle of about 135°.

[0024] The cutting blade (11) is a cross-shaped sheet alloy blade, which is thin at one end and thick at the other, with the thick end being about 2mm.

[0025] The working principle of this utility model is as follows:

[0026] This device includes a drill bit body, which is bolted to the hollow anchor rod via threads inside the hollow anchor rod. The drill bit body is equipped with a slag removal cutter and a reamer to remove stone debris from the anchor hole. The slurry outlet hollow body is equipped with a slurry outlet hole and a slag-blocking mesh on the surface to ensure normal slurry outlet and prevent slag from entering the hole. The connecting sleeve is equipped with an external thread that matches the thread of the hollow anchor rod and has a cross-shaped cutting blade on its surface, which can effectively break the anchoring agent to achieve a full slurry outlet reaction and anchoring effect.

Claims

1. A tunnel built-in extrusion type resin cartridge anchor bit comprising a bit body (1), characterized in that, The drill bit body (1) consists of a rotating part (4) and a connecting sleeve (10). The rotating part (4) is connected to the connecting sleeve (10). The connecting sleeve (10) is provided with external threads and is connected to the hollow anchor rod (2) through threaded area matching. The rotating part (4) consists of a main body, a slag removal cutter (3), a rotating rod (5), and a reamer (6). The rotating part (4) is conical at the front end. Multiple slag removal cutters (3) are arranged in a plum blossom pattern on the rotating part (4). The rotating rod (5) is located behind the rotating part (4) and is connected to the reamer (6). The connecting sleeve (10) is connected to the connecting sleeve (10). The connecting sleeve (10) is composed of a slurry hollow body (7), a slag-blocking mesh (8), and a breaking knife (11). The upper part of the connecting sleeve (10) is the slurry hollow body (7). The slurry hollow body (7) is provided with a slurry outlet hole (9). The slurry outlet hole (9) is provided with a slag-blocking mesh (8). The connecting sleeve (10) is provided with an external thread. The breaking knife (11) is fixed inside the connecting sleeve (10). The reamer (6) is cross-shaped, with an external oblique angle of 135° on the outside. The breaking knife (11) is a cross-shaped sheet alloy knife, which is thin at one end and thick at the other end, with the thick end being 2mm.

2. The tunnel-embedded extrusion-type resin cartridge anchor drill bit according to claim 1, characterized in that, The hollow body (7) on the connecting sleeve (10) is provided with multiple slurry outlet holes (9), which are elliptical in shape and have an upward angle of 135°.

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