Drilling box special for coal mine drilling machine

Abstract

The invention provides a special drill box for a coal mine drilling machine, which comprises a main body, a cylinder barrel, a piston, a spring, a spline shaft, a plurality of guide blocks and a compression ring, the main body is connected with the cylinder barrel through a connecting sleeve, the pressing sleeve is connected with the plurality of guide blocks, the guide blocks are slidably connected with claws, the compression ring is arranged on the peripheral sides of the plurality of guide blocks, and the main body is further connected with the cylinder barrel through an oil pipe; the main body is provided with a water inlet and an oil inlet, an unthreaded hole is formed in the cylinder barrel, the oil inlet is communicated with the unthreaded hole through an oil pipe, the spline shaft is provided with a water through hole communicated with the water inlet, the guide block can slide in the axial direction of the cylinder barrel, and the clamping jaw is used for clamping and fixing a drill rod. The drill box can automatically clamp and loosen a drill rod, compared with manual operation, the speed is higher, use is more convenient, and the operation efficiency of a drilling machine is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining equipment, and particularly relates to a special drill box for a coal mine drill rig. Background Art

[0002] Coal mine roadway support operations require drilling holes in coal seams or rock walls. Traditional support work mainly relies on a large amount of manual drilling, anchoring, etc.

[0003] Currently, coal mine roadway support operations are mainly completed by anchor protection drill rigs. The drill rig needs to use a drill box when drilling; the drill box can drive the drill pipe to rotate and can also achieve the water passing function. The water flow enables the impurities generated during the drilling process to be discharged and cleaned in time, preventing the drill pipe from being blocked and cooling the drill pipe, so as to facilitate the continuous operation of the drill pipe and improve the drilling efficiency. Currently, before starting the drilling operation, after the drill pipe is placed in the drill box, the drill box cannot automatically clamp and fix the drill pipe. Therefore, it is necessary for workers to fix the drill pipe on the drill box through the cooperation of an internal hexagonal structure or other manual operation methods. After the drilling operation of the drill rig is completed, the drill pipe still needs to be manually disassembled to be removed; that is, the coal mine roadway support operation has not been fully automated and continuous.

[0004] Coal mine drill rigs work in the harsh environment at the forefront of the roadway all year round, and there is always a risk of collapse at any time. Moreover, during the working process, the drill pipe needs to be replaced according to the on-site situation; currently, existing technologies have developed drill rigs that can automatically replace the drill pipe, but the fixing and disassembling processes of the drill pipe still require manual operation during the replacement process. Thus, manual operation is not only an important reason restricting the overall working efficiency of the drill rig, but also poses a considerable safety hazard to the operators.

[0005] In view of the above problems, it is particularly important to develop a special drill box for a coal mine drill rig that can automatically clamp or loosen the drill pipe to achieve automation, continuity, and safe operation of coal mine roadway support operations. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a special drill box for a coal mine drill rig in view of the deficiencies of the above-mentioned prior art. The device has a scientific and reasonable structural design. Using hydraulic power and spring elasticity as the power source, it can flexibly clamp and disassemble the drill pipe, fully isolate the waterway and the hydraulic oil circuit, has strong practicability and high safety, and can be widely used.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A special drill box for a coal mine drill, characterized in that it includes a main body, a cylinder barrel, a piston, a spring, a spline shaft, a guide block and a pressing ring. The main body is connected to the cylinder barrel through a connecting sleeve. A pressing sleeve is arranged in the cylinder barrel. The pressing sleeve is connected to a plurality of guide blocks. A claw is slidably connected to the guide block. A pressing ring is arranged on the circumferential side of the plurality of guide blocks. The main body is also connected to the cylinder barrel through a oil pipe. An inlet for water and an inlet for oil are arranged on the main body. A smooth hole is opened in the cylinder barrel. The inlet for oil is communicated with the smooth hole through an oil pipe. A spline shaft is arranged in the cylinder barrel. A main shaft is arranged in the main body. The main shaft is connected to the spline shaft. A water passing hole communicating with the inlet for water is arranged in the spline shaft and the main shaft. The guide block can slide along the axial direction of the cylinder barrel. The claw is used for clamping and fixing the drill pipe.

[0008] Preferably, the main body is fixedly connected to the connecting sleeve through a first connecting bolt. The connecting sleeve is fixedly connected to the cylinder barrel through a second connecting bolt. The cylinder barrel is fixedly connected to a gland through a third connecting bolt. A spline shaft is arranged in the cylinder barrel. One end of the spline shaft is slidably connected to the guide block through a keyway. A pressing sleeve is slidably sleeved on the outer wall part of the spline shaft close to the guide block. The guide block is connected to the pressing sleeve through a fourth connecting bolt. The water passing hole is opened through the central position of the spline shaft. The water passing hole is communicated with the inlet for water.

[0009] Preferably, a thrust ball bearing and a spring are sequentially arranged between the pressing sleeve and the connecting sleeve. The circumferential sides of the plurality of guide blocks are fixedly connected to the pressing ring through a fifth connecting bolt.

[0010] Preferably, a waterproof component is threadedly connected to one end of the spline shaft close to the guide block. A spring washer is arranged between the thrust ball bearing and the spring. A step for limiting the spring is arranged in the connecting sleeve. A clamping groove for clamping the drill pipe is arranged on the waterproof component.

[0011] Preferably, a copper water jacket and a main shaft are arranged in the main body. One end of the main shaft passes through the copper water jacket and is connected to a motor. The other end of the main shaft is key-connected to the spline shaft. A Gleitring is arranged in the sealing groove of the copper water jacket for the rotary seal of the main shaft. A first O-ring is arranged in the sealing groove of the main shaft for the static seal between the main shaft and the spline shaft. A drill box bearing is arranged between the main body and the copper water jacket to prevent the copper water jacket from rotating with the main shaft. A retaining ring is filled between the drill box bearing and the copper water jacket.

[0012] Preferably, a piston is sleeved on the spline shaft outside the pressing sleeve. A cylinder bearing is arranged at one end of the piston. The pressing sleeve is threadedly connected with a round nut, and the round nut can transmit the axial thrust of the cylinder bearing and the thrust ball bearing to the pressing sleeve. A first sealing ring and a second sealing ring are arranged in the sealing groove of the piston. A second O-ring is arranged in the sealing groove of the cylinder. A stop block for sealing the oil circuit is fixedly arranged on the side wall of the cylinder. A sealed oil cavity is formed among the piston, the gland, the cylinder and the stop block. The sealed oil cavity communicates with the light hole. By injecting hydraulic oil into the sealed oil cavity, the pressing sleeve is driven to move along the spline shaft, so that the guide block slides accordingly, and the claw is contracted and released.

[0013] Preferably, the side wall of the oil pipe is fixedly connected with the side wall of the connecting sleeve.

[0014] Preferably, there are three guide blocks in total. The cross section of the guide block is one-third of a ring. An inclined groove for connecting the claw is opened at the middle position of the guide block. The contact surface between the claw and the drill pipe is set to be V-shaped.

[0015] The present invention has the following advantages compared with the prior art: 1. The present invention can realize the automatic clamping and relaxation of the drill pipe by the claw, improve the working efficiency of the drilling rig. During the working process of the drilling rig, water can be injected into the water inlet to realize water passing through the drill hole, discharge impurities in the drill hole, and the oil and water are separated during the working process of the drill box. The water circuit and the oil circuit are arranged independently. A Gleason ring is used for sealing at the water circuit rotating part, prolonging the sealing life; the drill box is integrally divided into three sections for assembly, which is convenient for disassembly. For the parts that need to replace the sealing ring regularly, the replacement or maintenance efficiency can be greatly improved.

[0016] 2. The claw and the guide block for fixing the drill bit of the present invention both adopt a three-section split structure. The claw and the guide block can realize the clamping or relaxation of the drill pipe only through the cooperation between the inclined surfaces. The structure is simple and convenient for installation or disassembly. The contact surface between the claw and the drill pipe is designed as a "V" - shaped structure to limit the drill pipe and prevent the drill pipe from rotating during the drilling process. The following further describes the present invention in detail with reference to the drawings and embodiments. Description of the Drawings

[0017] Figure 1 is the three - dimensional structure schematic diagram of the present invention.

[0018] Figure 2 is the front - view sectional structure schematic diagram of the present invention.

[0019] Figure 3 is the front - view sectional structure schematic diagram of the main body in the present invention.

[0020] Figure 4 is the side - view sectional structure schematic diagram of the main body in the present invention.

[0021] Figure 5 is the local enlarged structural schematic diagram of part A in the present invention Figure 1 in the present invention.

[0022] Figure 6 is the front view sectional structural schematic diagram of the guide block in the present invention

[0023] Figure 7 is the top view structural schematic diagram of the guide block in the present invention

[0024] Figure 8 is the three-dimensional structural schematic diagram of the claw in the present invention

[0025] Description of the reference numerals: Detailed implementation manners

[0026] As Figures 1 to 8 shown, the present invention includes a main body 1, a cylinder barrel 6, a piston 17, a spring 22, a spline shaft 16, a guide block 9 and a pressing ring 10. The main body 1 is connected to the cylinder barrel 6 through a connecting sleeve 4. A pressing sleeve 15 is arranged inside the cylinder barrel 6. The pressing sleeve 15 is connected to a plurality of guide blocks 9. A claw 11 is slidably connected to the guide block 9. A pressing ring 10 is arranged on the circumferential sides of the plurality of guide blocks 9. The main body 1 is also connected to the cylinder barrel 6 through an oil pipe 3. An inlet a for water and an inlet c for oil are arranged on the main body 1. A light hole d is opened inside the cylinder barrel 6. The inlet c for oil is communicated with the light hole d through the oil pipe 3. A spline shaft 16 is arranged inside the cylinder barrel 6. A main shaft 23 is arranged inside the main body 1. The main shaft 23 is connected to the spline shaft 16. A water passing hole communicating with the inlet a for water is arranged inside the spline shaft 16 and the main shaft 23. The guide block 9 can slide along the axial direction of the cylinder barrel. The claw 11 is used for clamping and fixing a drill pipe. In this embodiment, the main body 1 is fixedly connected to the connecting sleeve 4 through a first connecting bolt 2. The connecting sleeve 4 is fixedly connected to the cylinder barrel 6 through a second connecting bolt 5. The cylinder barrel 6 is fixedly connected to a gland 7 through a third connecting bolt 13. A spline shaft 16 is arranged inside the cylinder barrel 6. The upper part of the spline shaft 16 is slidably connected to the guide block 9 through a keyway. A pressing sleeve 15 is slidably sleeved on the outer side wall part of the spline shaft 16 close to the guide block 9. The guide block 9 is connected to the pressing sleeve 15 through a fourth connecting bolt 8. The water passing hole is penetrated and opened at the central position of the spline shaft 16. The water passing hole is communicated with the inlet a for water.

[0027] In this embodiment, a thrust ball bearing 20 and a spring 22 are sequentially arranged between the pressing sleeve 15 and the connecting sleeve 4. The circumferential sides of the three guide blocks 9 are fixedly connected to the pressing ring 10 through a fifth connecting bolt 12.

[0028] In this embodiment, a waterproof component 14 is threadedly connected near the upper end of the spline shaft 16 close to the guide block 9. A spring washer 21 is arranged between the thrust ball bearing 20 and the spring 22. A step for limiting the spring 22 is arranged in the connecting sleeve 4, and a clamping groove for clamping the drill pipe is arranged on the waterproof component 14.

[0029] In this embodiment, a copper water jacket 26 and a main shaft 23 are arranged in the main body 1. One end of the main shaft 23 passes through the copper water jacket 26 and is connected to the motor, and the other end of the main shaft 23 is key-connected to the spline shaft 16. A Gleitring 27 is arranged in the sealing groove of the copper water jacket 26 for the rotary seal of the main shaft 23. A first O-ring 28 is arranged in the sealing groove of the main shaft 23 for the static seal between the main shaft 23 and the spline shaft 16. A drill box bearing 24 is arranged between the main body 1 and the copper water jacket 26 to prevent the copper water jacket 26 from rotating with the main shaft 23, and a retaining ring 25 is filled between the drill box bearing 24 and the copper water jacket 26.

[0030] In this embodiment, a piston 17 is sleeved outside the pressing sleeve 15 on the spline shaft 16. A cylinder bearing 18 is arranged at one end of the piston 17. The pressing sleeve 15 is threadedly connected to a round nut 19, and the round nut 19 can transmit the axial thrust of the cylinder bearing 18 and the thrust ball bearing 20 to the pressing sleeve 15. A first sealing ring 29 and a second sealing ring 32 are arranged in the sealing groove of the piston 17. A second O-ring 31 is arranged in the sealing groove of the cylinder 6. A stop block 30 for sealing the oil circuit is fixedly arranged on the side wall of the cylinder 6. A sealed oil cavity is formed among the piston 17, the gland 7, the cylinder 6 and the stop block 30. The sealed oil cavity communicates with the light hole d. By injecting hydraulic oil into the sealed oil cavity, the pressing sleeve 15 is driven to move along the spline shaft 16, so that the guide block 9 slides accordingly to make the jaws 11 contract and release.

[0031] In this embodiment, the side wall of the oil pipe 3 is fixedly connected to the side wall of the connecting sleeve 4.

[0032] In this embodiment, there are three guide blocks 9 in total. The cross section of the guide block 9 is one-third of a ring. An inclined groove 33 for connecting the jaws 11 is opened at the middle position of the guide block 9. The contact surface between the jaws 11 and the drill pipe is set to be V-shaped.

[0033] During use, first inject hydraulic oil into the oil inlet c of the main body 1, and the hydraulic oil flows into the sealed oil cavity through the oil circuit. As the pressure in the sealed oil cavity increases, the piston 17, cylinder bearing 18, bush 15 and round nut 19 are pushed, and then the bush 15 drives the guide block 9 to move towards the main body 1. The guide block 9 and the claw 11 are matched through the inclined groove structure to simultaneously release the three claws 11. At this time, place the bottom of the drill pipe in the card slot of the waterproof component 14. Subsequently, the injection into the oil inlet c of the main body 1 stops. Under the action of the spring thrust, the piston 17 and the bush 15 push the guide block 9 to rebound. At this time, the hydraulic oil is squeezed out, and the guide block 9 and the claw 11 are matched through the inclined groove structure again to simultaneously tighten the three claws 11, firmly fixing the drill pipe. Then start the motor to drive the main shaft 23, spline shaft 16, waterproof component 14 and drill pipe to rotate, and at the same time inject water through the water inlet a. The water flows into the drill pipe through the water passing hole, and at this time, the drilling operation can be started. After the drilling operation is completed, the injection into the water inlet a on the main body 1 stops, and then the oil inlet c injects hydraulic oil, and the three claws 11 are simultaneously released, and the drill pipe can be taken out.

[0034] The above is only a preferred embodiment of the present invention and does not impose any limitation on the present invention. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A special drill box for coal mine drilling rig, characterized in that: The invention comprises a main body (1), a cylinder (6), a piston (17), a spring (22), a spline shaft (16), a guide block (9) and a pressure ring (10), wherein the main body (1) is connected to the cylinder (6) via a connecting sleeve (4), a pressure sleeve (15) is arranged inside the cylinder (6), the pressure sleeve (15) is connected to a plurality of guide blocks (9), a slidably connected claw (11) is arranged on the guide block (9), and a pressure ring (10) is arranged on the peripheral side of the plurality of guide blocks (9), and the main body (1) is also connected to the cylinder (6) via an oil pipe (3); the main body A water inlet (a) and an oil inlet (c) are arranged on the main body (1); a light hole (d) is arranged in the cylinder (6); the oil inlet (c) is connected to the light hole (d) through an oil pipe (3); a spline shaft (16) is arranged in the cylinder (6); a main shaft (23) is arranged in the main body (1); the main shaft (23) is connected to the spline shaft (16); a water hole connected to the water inlet (a) is arranged in the spline shaft (16) and the main shaft (23); the guide block (9) can slide along the axial direction of the cylinder; and the clamping claw (11) is used to clamp and fix the drill rod.

2. A special drill box for coal mine drilling rigs according to claim 1, characterized in that: The main body (1) is fixedly connected to the connecting sleeve (4) via a first connecting bolt (2), the connecting sleeve (4) is fixedly connected to the cylinder (6) via a second connecting bolt (5), the cylinder (6) is fixedly connected to the pressure cover (7) via a third connecting bolt (13), a spline shaft (16) is arranged in the cylinder (6), one end of the spline shaft (16) is slidably connected to the guide block (9) via a keyway, a pressure sleeve (15) is slidably sleeved on the outer wall portion of the spline shaft (16) close to the guide block (9), the guide block (9) is connected to the pressure sleeve (15) via a fourth connecting bolt (8), the water through hole is penetrated at the center of the spline shaft (16), and the water through hole is connected to the water inlet (a).

3. A special drill box for coal mine drilling rigs according to claim 2, characterized in that: A thrust ball bearing (20) and a spring (22) are arranged in sequence between the pressing sleeve (15) and the connecting sleeve (4), and the peripheral sides of the plurality of guide blocks (9) are fixedly connected to the pressing ring (10) via fifth connecting bolts (12).

4. A special drill box for coal mine drilling rigs according to claim 3, characterized in that: One end of the spline shaft (16) close to the guide block (9) is threadedly connected to the waterproof component (14), a spring pressing sheet (21) is provided between the thrust ball bearing (20) and the spring (22), and a step of the limit spring (22) is provided in the connecting sleeve (4).

5. A special drill box for coal mine drilling rigs according to claim 2, characterized in that: A copper water jacket (26) and a main shaft (23) are arranged in the main body (1), one end of the main shaft (23) passes through the copper water jacket (26) and is connected to the motor, and the other end of the main shaft (23) is key-connected to the spline shaft (16), a Gly ring (27) is arranged in the sealing groove of the copper water jacket (26), a first O-ring (28) is arranged in the sealing groove of the main shaft (23), a drill box bearing (24) is arranged between the main body (1) and the copper water jacket (26), and a retaining ring (25) is filled between the drill box bearing (24) and the copper water jacket (26).

6. A special drill box for coal mine drilling rigs according to claim 3, characterized in that: A piston (17) is sleeved on the spline shaft (16) and is located outside the pressing sleeve (15). A cylinder bearing (18) is arranged at one end of the piston (17). The pressing sleeve (15) is threadedly connected to a round nut (19). A first sealing ring (29) and a second sealing ring (32) are arranged in the sealing groove of the piston (17). A second O-ring (31) is arranged in the sealing groove of the cylinder (6). A stopper (30) for sealing an oil circuit is fixedly arranged on the side wall of the cylinder (6). A sealed oil chamber is formed between the piston (17), the pressure cover (7), the cylinder (6) and the stopper (30). The sealed oil chamber is connected to the light hole (d).

7. The special drill box for coal mine drilling rig according to claim 1, characterized in that: The side wall of the oil pipe (3) is fixedly connected to the side wall of the connecting sleeve (4).

8. The special drill box for coal mine drilling rig according to claim 1, characterized in that: There are three guide blocks (9) in total. The cross section of the guide block (9) is one-third of a circular ring. An inclined groove (33) for connecting the claw (11) is provided in the middle of the guide block (9).

Images