A special independent drill bit for integrated drilling and cutting in mining

Abstract

The invention discloses a special independent drill bit for integrated drilling and cutting for mining, which is characterized by comprising: a water inlet pipe, which is a non-rotating body, a water passage is provided inside and along its axial direction, and a bayonet hole is provided on its side; a water outlet pipe, which is a truncated cone structure, the lower bottom surface of which is connected to the water inlet pipe, and a plurality of water outlet pipes are provided inside and along its axial direction, and the plurality of water outlet pipes are all connected to the water passage; drill teeth are evenly distributed on the side wall of the water outlet pipe; the water inlet pipe is used as the inlet of the water flow, and flows out after being diverted to a plurality of water outlet pipes through the water passage. The problem of difficulty in replacing independent drill bits in coal mines in the prior art is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of conventional geological drilling, and in particular relates to a special independent drill bit for integrated drilling and cutting for mining. Background Art

[0002] Domestic research on high-pressure water jet permeability enhancement and gas blowout prevention technology began in the 1990s. The integrated drilling and cutting high-pressure water jet permeability enhancement and gas blowout prevention equipment and technology is suitable for shallow gas blowout prevention drilling holes because the integrated drilling and cutting independent drill bits are connected by threads. After a long period of deep hole construction, the connecting threads cannot be disassembled and replaced underground and need to be heated above ground before disassembly and replacement. It is difficult to replace the independent drill bit, which affects the construction progress. Summary of the invention

[0003] The purpose of the present invention is to provide a special independent drill bit for integrated drilling and cutting for mining, so as to solve the problem of difficulty in replacing the independent drill bit in the coal mine in the prior art.

[0004] The present invention adopts the following technical solution: a special independent drill bit for integrated drilling and cutting for mining, comprising:

[0005] A water inlet pipe is a non-rotating body, a water passage is provided inside the pipe along its axis, and a bayonet hole is provided on its side;

[0006] A water outlet pipe is a truncated cone structure, the bottom surface of which is connected to the water inlet pipe, and a plurality of water outlet pipes are arranged inside the water outlet pipe and along the axial direction thereof, and the plurality of water outlet pipes are connected to the water passage;

[0007] A plurality of drill teeth are evenly distributed on the side wall surface of the outlet pipe;

[0008] The water inlet pipe is used as the inlet of the water flow, and is divided into multiple water outlet pipes through the water channel before flowing out.

[0009] Furthermore, a threaded blind hole is coaxially arranged at one end of the water inlet pipe away from the water outlet pipe, and is used for detachably connecting the top rod.

[0010] Furthermore, the water passage has a passage path located on one side of the threaded blind hole and has a semicircular ring shape in cross section.

[0011] Further, the plurality of water outlet pipelines include:

[0012] At least two straight water holes are arranged in parallel on the upper bottom surface of the water outlet pipe along the axial direction of the water outlet pipe;

[0013] At least three water outlet holes are arranged at intervals on the side wall of the water outlet pipe; each water outlet hole is located between two drill teeth.

[0014] Furthermore, a spring, a bayonet and a bayonet bushing are installed in sequence from the inside to the outside in the bayonet hole, and the bayonet is used as a connecting part of the water inlet pipe.

[0015] Furthermore, the bayonet is a columnar structure, and a boss is provided on one side of the bottom end thereof;

[0016] The bayonet bushing is a circular ring structure with an opening on its inner ring wall; the opening is used for the bayonet and its upper boss to pass through, and is also used to limit the bayonet to the inner side of the bayonet bushing after the bayonet is rotated.

[0017] Furthermore, the side walls of the water inlet pipe are all rounded.

[0018] The beneficial effects of the present invention are: a special independent drill bit for integrated drilling and cutting for mining, including a drill bit connection method and a drill bit water passage; the tail end of the water inlet pipe is a square body, and a top rod connected by a thread is installed on the plane of the tail end, a bayonet hole is opened on the side of the tail end of the water inlet pipe, and a bayonet bushing is installed in the bayonet hole with an interference fit, and the bayonet fixing method can effectively improve the replacement efficiency of the independent drill bit, avoid the problem of low replacement efficiency caused by the threaded structure, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an independent drill bit specially used for integrated drilling and cutting for mining of the present invention;

[0020] Figure 2 yes Figure 1 The main cross-sectional view of

[0021] Figure 3 It is a top view of a special independent drill bit for integrated drilling and cutting for mining of the present invention;

[0022] Figure 4 The utility model is a stereoscopic schematic diagram of a bayonet of an independent drill bit specially used for integrated drilling and cutting for mining according to the present invention.

[0023] Among them, 1. boss, 2. ejector rod, 3. bayonet, 4. bayonet bushing, 5. spring, 6. water passage,

[0024] 7. Threaded blind hole, 8. Bayonet hole, 9. Rounded corner, 10. Water inlet pipe, 11. Water outlet pipe, 12. Straight water outlet hole,

[0025] 13. Water outlet. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The present invention discloses a special independent drill bit for integrated drilling and cutting for mining. Figure 1As shown, it includes: an inlet pipe 10, which is a non-rotating body, and a water passage 6 is provided inside and along its axial direction, and a bayonet hole 8 is opened on its side; a water outlet pipe 11, which is a truncated cone structure, and its lower bottom surface is connected to the water inlet pipe 10, and a plurality of water outlet pipes are provided inside and along its axial direction, and the plurality of water outlet pipes are connected to the water passage 6; a plurality of drill teeth are evenly distributed on the side wall of the water outlet pipe 11; the water inlet pipe 10 is used as the inlet of the water flow, and flows out after being diverted to a plurality of water outlet pipes through the water passage 6.

[0028] A special independent drill bit for integrated drilling and cutting for mining, including a drill bit connection method and a drill bit water passage; the tail end of a water inlet pipe is a square body, and a top rod connected by a thread is installed on the plane of the tail end, a bayonet hole is provided on the side of the tail end of the water inlet pipe, and a bayonet bushing is installed in the bayonet hole with an interference fit, and the bayonet fixing method can effectively improve the replacement efficiency of the independent drill bit, avoid the problem of low replacement efficiency caused by the threaded structure, and improve work efficiency.

[0029] In some embodiments, a threaded blind hole 7 is coaxially provided at one end of the water inlet pipe 10 away from the water outlet pipe 11, which is used for detachable connection to the top rod 2; a mounting hole for the top rod 2 is provided at the center of the plane at the rear end of the water inlet pipe 10, and the top rod 2 and the water inlet pipe 10 are connected by threads, and a water passage 6, whose passage path is located on one side of the threaded blind hole 7, the water passage 6 of the water inlet pipe 10 avoids the installation position of the top rod 2, and the water passage 6 of the water inlet pipe 10 cannot be connected with the bayonet hole, there are five water outlet holes at the front end of the water outlet pipe 11, two of which are directly connected to the water passage 6, and three water passages are evenly distributed between the three groups of drill teeth, and the cross-section of the water passage 6 of the water outlet pipe 11 is semicircular.

[0030] In some embodiments, Figure 3 As shown, the multiple water outlet pipes include: two straight water holes 12, which are arranged in parallel on the upper bottom surface of the water outlet pipe 11 along the axial direction of the water outlet pipe 11; three water outlet holes 13, which are spaced apart and arranged on the side wall surface of the water outlet pipe 11; each water outlet hole 13 is located between two drill teeth.

[0031] In some embodiments, Figure 2 , Figure 4 As shown, a spring 5, a bayonet 3 and a bayonet bushing 4 are sequentially installed in the bayonet hole 8 from the inside to the outside, and the bayonet 3 is used as a connection part of the water inlet pipe 10. The bayonet 3 is a columnar structure, and a boss 1 is arranged on one side of its bottom end; the bayonet bushing 4 is a circular ring structure, and an opening is arranged on its inner ring wall; the opening is used for the bayonet 3 and the boss 1 thereon to pass through, and is also used for limiting the bayonet 3 to the inner side of the bayonet bushing 4 after rotating the bayonet 3 to form an integral structure with the water inlet pipe 10, and the side walls of the water inlet pipe 10 are all chamfered 9.

[0032] The specific method of using the independent drill bit for integrated drilling and cutting for mining of the present invention is as follows: the water inlet pipe 10 and the push rod 2 are connected by threads; the water passage 6 of the water inlet pipe 10 avoids the installation position of the push rod 2, and the water passage 6 of the water inlet pipe 10 cannot be connected with the bayonet hole, the front end of the water outlet pipe 11 has five water outlet holes, two of which are directly connected to the water passage 6, and three water passages are evenly distributed between the three groups of drill teeth, so that the water in the water passage 6 can be quickly sprayed out, thereby cleaning the drill bit, the square axis of the water inlet pipe 10 has chamfered corners 9, and the cross section of the water passage 6 is a semicircular ring.

[0033] The bayonet hole on the side of the water inlet pipe 10 is installed with a bayonet bushing 4, which is installed in the bayonet hole by interference fit, and the bayonet bushing 4 and the water inlet pipe 10 are welded and reinforced outside the bayonet hole to form an integrated structure. The spring 5 is installed at the rear end of the bayonet bushing 4, and the boss 1 at the tail end of the bayonet 3 is installed into the bayonet hole through the opening of the bayonet bushing 4 and then rotated 90 degrees, and the spring 5 rebounds to push the boss 1 at the tail end of the bayonet 3 to a fixed position and lock it.

[0034] The present invention discloses an independent drill bit for integrated drilling and cutting for mining. Its water inlet pipe is a non-rotating body, such as a quadrangular prism, and its inlet end face can be connected to a push rod by a thread. A bayonet hole is provided on the side of the water inlet pipe, and a bayonet bushing is installed in the bayonet hole with an interference fit. The bayonet fixing method can effectively improve the replacement efficiency of the independent drill bit, avoid the problem of low replacement efficiency caused by the original drill bit being connected with other components by a threaded structure, and improve work efficiency.

Claims

1. A special independent drill bit for integrated drilling and cutting for mining, characterized in that: include: A water inlet pipe (10) is a non-rotating body, a water passage (6) is provided inside the pipe along its axis, and a bayonet hole (8) is provided on its side; A water outlet pipe (11) is a truncated cone structure, the bottom surface of which is connected to the water inlet pipe (10), and a plurality of water outlet pipes are arranged inside the water outlet pipe and along its axial direction, and the plurality of water outlet pipes are all connected to the water passage (6); A plurality of drill teeth are evenly distributed on the side wall surface of the water outlet pipe (11); The water inlet pipe (10) is used as an inlet for water flow, and is divided into a plurality of water outlet pipes through the water passage (6) before flowing out; A spring (5), a bayonet (3) and a bayonet bushing (4) are installed in sequence from the inside to the outside in the bayonet hole (8); the bayonet (3) is used as a connecting portion of the water inlet pipe (10); The latch (3) is a columnar structure, with a boss (1) provided on one side of its bottom end; The bayonet bushing (4) is a circular ring structure, and an opening is provided on its inner ring wall surface; the opening is used for allowing the bayonet (3) and the boss (1) thereon to pass through, and is also used for limiting the bayonet (3) to the inner side of the bayonet bushing (4) after the bayonet (3) is rotated.

2. The independent drill bit for integrated drilling and cutting for mining as claimed in claim 1, characterized in that: A threaded blind hole (7) is coaxially arranged at one end of the water inlet pipe (10) away from the water outlet pipe (11), and is used for detachably connecting the top rod (2).

3. The independent drill bit for integrated drilling and cutting for mining as claimed in claim 2, characterized in that: The water passage (6) has a passage path located on one side of the threaded blind hole (7) and has a semicircular ring shape in cross section.

4. A mining integrated drilling and cutting dedicated independent drill bit as claimed in any one of claims 1 to 3, characterized in that: The plurality of water outlet pipelines include: At least two straight water holes (12) are arranged in parallel on the upper bottom surface of the water outlet pipe (11) along the axial direction of the water outlet pipe (11); At least three water outlet holes (13) are arranged at intervals on the side wall surface of the water outlet pipe (11); each water outlet hole (13) is located between two drill teeth.

5. A mining integrated drilling and cutting dedicated independent drill bit as claimed in any one of claims 1 to 3, characterized in that: The side walls of the water inlet pipe (10) are all rounded (9).

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