Long-distance double-roller flexible coal mining machine

Abstract

The invention discloses a long-distance double-roller flexible coal mining machine. The long-distance double-roller flexible coal mining machine comprises a driving part, a double-roller cutting head, a conveying part and a walking part, the driving part drives the spiral drill rod to rotate through the hydraulic motor, the spiral drill rod drives the cutting head to cut a coal seam, and meanwhile propelling and retreating of the equipment are achieved through a gear and rack system. The conveying part is of a flexible drill rod box structure, a spiral drill rod transmits torque, drill rod boxes bear push-pull force, the angle between the drill rod boxes is adjusted in a self-adaptive mode according to actual terrain changes, and vibration and impact generated in the drilling process of equipment are reduced. The double-roller cutting head adjusts the coal mining height in a self-adaptive mode, and the efficient coal mining requirement under coal seams of different heights is met. The walking part reduces the dinting amount as much as possible through crawler belt supporting equipment, and the hydraulic oil cylinder adjusts the angle of the equipment to meet the requirements of downward mining, upward mining and horizontal coal mining operation. The method has the advantages of high efficiency, stability, high adaptability and the like, and is suitable for long-distance coal mining operation of complex coal seams.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal mining machines, and particularly relates to a long-distance double-drum flexible coal mining machine. Background Art

[0002] With the increase in the depth of coal resource mining and the complexity of mine mining conditions, the adaptability and mining efficiency of traditional coal mining equipment in complex coal seams are greatly limited. The rigidly connected drill pipe structure is difficult to adapt to the undulations of the coal seam and geological changes, and it is easy to cause serious vibration and impact of the equipment due to concentrated load. In addition, the operation distance of traditional coal mining equipment is limited and it is difficult to meet the requirements of long-distance mining. The spiral drill pipes of traditional equipment usually bear torque and pushing and pulling forces at the same time, resulting in uneven stress and affecting the system stability and performance. For soft coal seams, the traditional coal mining equipment has a relatively large contact pressure on the ground due to the direct contact between the drill pipe and the coal seam, which is easy to cause coal seam collapse or equipment jamming, further reducing the mining efficiency. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to provide a long-distance double-drum flexible coal mining machine, which uses double-drum cutting heads to adapt to the undulations of the coal seam for high-efficiency coal mining, and realizes adaptive adjustment through the flexible connection design of the spiral drill pipe and the drill pipe box, adapts to complex geological conditions, reduces the vibration and impact generated during the drilling process of the equipment, and is suitable for complex coal seams and long-distance mining operations.

[0004] Technical Solution: A long-distance double-drum flexible coal mining machine of the present invention includes a driving part, a conveying part, double-drum cutting heads and a traveling part; the driving part is placed above the traveling part, one end of the conveying part is connected to the driving part, and the other end is connected to the double-drum cutting heads; the driving part provides power for the double-drum cutting heads through the conveying part.

[0005] Further, the driving part includes a driving motor and a traveling motor, the driving motor is connected to the spiral drill pipe of the conveying part through a pin shaft to provide torque transmission; the driving part housing is fixedly connected to the drill pipe box of the conveying part, and the traveling motor drives the gear and rack to realize the drilling and retraction of the coal mining machine.

[0006] Further, a rack is provided below the driving part, and the traveling motor drives the gear and rack mechanism to push the spiral drill pipe and the cutting head forward to realize long-distance coal mining operations.

[0007] Further, the conveying part includes a drill pipe box, a spiral drill pipe, a drill pipe box flexible connection part and a spiral drill pipe flexible connection part; the drill pipe box flexible connection part includes a male joint, a female joint and a pin shaft III; the spiral drill pipe flexible connection part includes a male joint, a female joint, a cross shaft, a limit block, a pin shaft II and a pin shaft I.

[0008] Further, the male and female joints in the flexible connection part of the drill pipe box are fixed at both ends of the drill pipe box by welding. The horizontal axis of the male joint is inserted into the cylindrical groove of the female joint and fixed in position by pin III. The male and female joints of the flexible connection part of the screw drill pipe are fixed at both ends of the screw drill pipe by threads. The limit block is fixed to the end face of the female joint by screws, and the cross shaft is fixed in the middle of the female joint.

[0009] Further, in the structure of the drill pipe box, the screw drill pipe in the conveying part is supported in the drill pipe box by a sliding bearing. The sliding bearing is composed of split bearing bushes, which are used to reduce rotational friction and enhance structural stability.

[0010] Further, the double-drum cutting head is driven by the rotation of the screw drill pipe and can adapt to the undulations of the coal seam to efficiently mine coal.

[0011] Further, the traveling part is used to support and move the coal shearer and ensure that the equipment can move forward smoothly during operation and adapt to the terrain changes of complex coal seams.

[0012] Further, the traveling part is connected to the conveying part by four independently controlled hydraulic cylinders, which can adjust the coal mining height and angle to meet the requirements of downcutting, upcutting and horizontal coal mining operations.

[0013] Further, the traveling part includes two sets of crawlers. An oil tank and a motor are arranged above the crawlers to provide power for the hydraulic motors of the driving part.

[0014] Further, the screw drill pipe of the conveying part is responsible for torque transmission, and the drill pipe box bears the pushing and pulling forces and gravity, optimizing the mechanical properties of the system, reducing the uneven stress of the structure, and significantly increasing the operating distance of the coal shearer.

[0015] Further, the driving part, the conveying part and the traveling part adopt modular design, and each component is convenient for disassembly and maintenance, improving the operating efficiency and service life of the equipment.

[0016] Preferably, the conveying part is a flexible drill pipe box structure suitable for complex coal seams. This structure can allow a certain range of angle adjustment while the screw drill pipe transmits torque and the drill pipe box bears the pushing and pulling forces, enabling the equipment to operate more smoothly under complex geological conditions, thereby improving the conveying efficiency and the operating stability of the equipment.

[0017] Specifically, the screw drill pipe includes a drill pipe barrel, spiral blades and a flexible connection part of the screw drill pipe; the drill pipe box includes a sliding bearing seat, a drill pipe box body and a flexible connection part of the drill pipe box. Both can adaptively adjust the angle to pass through the coal seam when the coal seam undulates.

[0018] The long-distance flexible shearer of the present invention adopts a combination of hydraulic motor drive and rack and pinion propulsion, and can achieve efficient and stable coal mining operations under complex coal seam conditions.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages:

[0020] 1. Through the flexible connection design of the helical drill rod and the drill rod box, it can be adaptively adjusted within a certain angle range to adapt to the complex coal seam terrain, reduce impact vibration and stress concentration, and improve the running stability.

[0021] 2. The helical drill rod is only responsible for torque transmission, while the drill rod box bears the pushing and pulling forces and gravity, thus avoiding the problem of unstable operation caused by load superposition in the traditional structure. Through this division of labor design, the mechanical properties of the system are optimized, and the uneven stress of the structure is reduced. This design effectively extends the working distance of the shearer.

[0022] 3. Through the design of the drill rod box support structure, the present invention can effectively reduce the contact pressure on the coal seam compared with the traditional drill-type shearer, and is more suitable for the mining operation of soft coal seams.

[0023] 4. The angle of the drill rod box of the present invention can be adjusted, and limit blocks of different heights can be selected according to the actual situation of the coal seam to control the angle adjustment range. The height adjustment of the limit block can meet the requirements of different working conditions, ensuring the flexibility of the equipment and effectively preventing structural stress or unstable operation caused by excessive angles.

[0024] 5. A double-drum adaptive cutting head is adopted, which can automatically adjust the cutting height according to the undulation of the coal seam, reduce the efficiency loss caused by the irregularity of the coal seam, and improve the coal mining efficiency.

[0025] 6. The walking part adopts a double-track design, minimizing the amount of undercutting as much as possible, effectively reducing the damage to the bottom of the coal seam during coal mining operations, and ensuring the stable walking of the shearer under complex coal seam conditions.

[0026] 7. Four independently adjustable oil cylinders are provided in the walking part, which can realize downcutting, upcutting and multi-angle coal mining operations, adapt to various coal seam dips, and improve the operation flexibility and application range. Description of the drawings

[0027] Figure 1 is a schematic diagram of the long-distance double-drum flexible shearer of the present invention;

[0028] Figure 2 Schematic diagram of the structure of the shearer drive part;

[0029] Figure 3 is a top view of the connection of two drill rod boxes of the shearer walking part;

[0030] Figure 4 It is a schematic structural diagram of the flexible connection part of the spiral drill pipe;

[0031] Figure 5 It is a schematic structural diagram of the flexible connection part of the drill pipe box;

[0032] Figure 6 It is a schematic structural diagram of the traveling part;

[0033] In the figure, 1 - driving part, 1 - 1 - driving motor, 1 - 2 - traveling motor, 1 - 3 - gear rack, 1 - 4 - driving part housing, 2 - conveying part, 2 - 1 - drill pipe box, 2 - 2 - spiral drill pipe, 2 - 3 - flexible connection part of drill pipe box, 2 - 3 - 1 - male joint of drill pipe box, 2 - 3 - 2 - pin shaft Ⅲ, 2 - 3 - 3 - female joint of drill pipe box, 2 - 4 - flexible connection part of spiral drill pipe, 2 - 4 - 1 - male joint of spiral drill pipe, 2 - 4 - 2 - limiting block, 2 - 4 - 3 - spring pin, 2 - 4 - 4 - female joint of spiral drill pipe, 2 - 4 - 5 - cross shaft, 2 - 4 - 6 - pin shaft Ⅱ, 2 - 4 - 7 - pin shaft Ⅰ, 3 - double - drum cutting head, 4 - traveling part, 4 - 1 - hydraulic cylinder, 4 - 2 - traveling track, 4 - 3 - support beam. Detailed implementation manners

[0034] To further understand the technical solution of the present invention, in combination with the attached Figure 1 to the attached Figure 6 , the specific structure and working principle in the embodiments of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention and do not represent any formal limitation to the present invention.

[0035] As Figure 1 shown, a long - distance double - drum flexible coal mining machine mainly includes a driving part 1, a conveying part 2, a double - drum cutting head 3, and a traveling part 4. The working principle is that the driving motor 1 - 1 of the driving part 1 drives the spiral drill pipe 2 - 2 to rotate, transmits the power to the double - drum cutting head 3, and realizes the efficient cutting of the coal seam. The cut coal falls into the drill pipe box 2 - 1 and is conveyed to the scraper conveyor by the spiral drill pipe 2 - 2. During the drilling process, the driving part 1 drives the gear - rack 1 - 3 mechanism through the traveling motor 1 - 2, so that the conveying part 2 and the double - drum cutting head 3 move forward. At the same time, the drill pipe boxes 2 - 1 of the conveying part 2 are connected successively, and the double - drum cutting head 3 can be adaptively adjusted according to the coal seam height. During the retraction process, the driving part drives the conveying part 2 and the double - drum cutting head 3 to move backward in the reverse direction, and the drill pipe boxes 2 - 1 are disassembled successively to realize the withdrawal of the double - drum cutting head 3 from the drill hole.

[0036] As Figure 2As shown in the figure, the driving part 1 is mainly composed of a driving motor 1-1, a traveling motor 1-2, a rack and pinion 1-3, and a driving part housing 1-4. The driving motor 1-1 is connected to the auger 2-2 through a pin shaft II 2-4-6, and is responsible for transmitting torque to the cutting head 3. The driving part housing 1-4 is connected to the drill pipe box 2-1, and the traveling motor 1-2 drives the rack and pinion 1-3 to move, thereby realizing the drilling and retraction control of the drill rig.

[0037] As Figure 3 As shown in the figure, the conveying part 2 is mainly composed of a drill pipe box 2-1, an auger 2-2, a flexible connection part 2-3 of the drill pipe box, and a flexible connection part 2-4 of the auger. The drill pipe box supports the auger through a sliding bearing, and the sliding bearing is composed of a split bearing bush, which is used to reduce rotational friction and enhance structural stability. The flexible connection part 2-3 of the drill pipe box is welded to both ends of the drill pipe box 2-1, and the flexible connection part 2-4 of the auger is fixed to both ends of the auger 2-2 by screwing.

[0038] As Figure 4 As shown in the figure, the flexible connection part 2-3 of the drill pipe box includes a male joint 2-3-1 of the drill pipe box, a pin shaft III 2-3-2, and a female joint 2-3-3 of the drill pipe box. The female joint 2-3-3 of the drill pipe box has a cylindrical groove with a certain depth axially, and the two sides of the groove have a certain taper, and through holes are provided in the vertical direction. The male joint 2-3-1 extends a certain length of horizontal shaft to cooperate with the cylindrical groove of the female joint 2-3-3, and then inserts the pin shaft III 2-3-2 for positioning. Specifically, inclined surfaces with a certain taper are provided on both sides of the male joint 2-3-1, and both the male joint 2-3-1 and the female joint 2-3-3 are fixed to both ends of the drill pipe box 2-1 by welding. This design enables the drill pipe box 2-1 to flexibly adjust the angle within a certain range, avoiding jamming or damage of the equipment due to complex coal seam terrain.

[0039] As Figure 5As shown in the figure, the flexible connection part 2-4 of the auger drill pipe includes an auger drill pipe male joint 2-4-1, a limit block 2-4-2, a spring pin 2-4-3, an auger drill pipe female joint 2-4-4, a cross shaft 2-4-5, a pin shaft II 2-4-6 and a pin shaft I 2-4-7. Specifically, the male joint 2-4-1 and the female joint 2-4-4 are provided with different through holes in the radial direction. The cross shaft 2-4-5 passes through the through hole of the male joint 2-4-1 through the pin shaft I 2-4-7 and is fixed in the middle of the auger drill pipe male joint 2-4-1. The limit block 2-4-2 is fixed to the end face of the male joint 2-4-1 by threads and is located behind the cross shaft 2-4-5. The pin shaft II 2-4-6 passes through the hole of the pin shaft I 2-4-7 and the hole of the cross shaft 2-4-5 to realize the docking of the male joint 2-4-1 and the female joint 2-4-4. The spring pin 2-4-3 is inserted into the hole of the pin shaft II 2-4-6 to limit the pin shaft II 2-4-6. This structure can realize the adaptive adjustment of the auger drill pipe 2-2 within a certain angle range, adapt to the complex coal seam terrain, and reduce impact vibration and stress concentration.

[0040] As Figure 6 shown in the figure, the traveling part 4 includes a hydraulic cylinder 4-1, a traveling track 4-2 and a support beam 4-3. Among them, the traveling track 4-2 is responsible for the movement of the shearer working face. The support beam 4-3 is welded on the traveling track. Four hydraulic cylinders 4-1 are placed on the support beam. The mining height and angle are controlled by the expansion and contraction of the hydraulic cylinders 4-1. The support beam 4-3 supports the driving part 1 and the conveying part 2 of the shearer.

[0041] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification and equivalent change made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A long-distance double-drum flexible coal mining machine, characterized in that: The invention comprises a driving part (1), a conveying part (2), a double-drum cutting head (3) and a walking part (4); the driving part (1) is placed above the walking part (4); one end of the conveying part (2) is connected to the driving part (1), and the other end is connected to the double-drum cutting head (3); the driving part (1) provides power to the double-drum cutting head (3) through the conveying part (2).

2. A long-distance double-drum flexible coal mining machine according to claim 1, characterized in that: The driving part (1) comprises a driving motor (1-1) and a travel motor (1-2); the driving motor (1-1) is connected to the spiral drill rod (2-2) of the conveying part (2) via a pin shaft II (2-4-6) to provide torque transmission; the driving part housing (1-4) is fixedly connected to the drill rod box (2-1) of the conveying part (2); the travel motor (1-2) drives the gear rack (1-3) to realize the drilling and retreat of the coal mining machine.

3. A long-distance double-drum flexible coal mining machine according to claim 1, characterized in that: The conveying part (2) comprises a drill rod box (2-1), an auger rod (2-2), a drill rod box flexible connection part (2-3) and an auger rod flexible connection part (2-4); the drill rod box flexible connection part (2-3) comprises a male joint (2-3-1), a female joint (2-3-3) and a pin shaft III (2-3-2); the auger rod flexible connection part (2-4) comprises a male joint (2-4-1), a female joint (2-4-4), a cross shaft (2-4-5), a limit block (2-4-2), a pin shaft II (2-4-6) and a pin shaft I (2-4-7).

4. A long-distance double-drum flexible coal mining machine according to claim 3, characterized in that: The male joint (2-3-1) and the female joint (2-3-3) in the drill rod box flexible connection part (2-3) are fixed to the two ends of the drill rod box (2-1) by welding, the transverse axis of the male joint (2-3-1) is inserted into the cylindrical groove of the female joint (2-3-3), and is fixed in position by a pin III (2-3-2); the male joint (2-4-1) and the female joint (2-4-4) of the spiral drill rod flexible connection part (2-4) are fixed to the two ends of the spiral drill rod (2-2) by threads, the limit block (2-4-2) is fixed to the end face of the female joint (2-4-4) by screws, and the cross shaft (2-4-5) is fixed in the middle of the female joint (2-4-4).

5. A long-distance double-drum flexible coal mining machine according to claim 2 or 3, characterized in that: In the drill rod box (2-1) structure, the spiral drill rod (2-2) in the conveying part (2) is supported in the drill rod box (2-1) via a sliding bearing, and the sliding bearing is composed of a split bearing bush.

6. A long-distance double-drum flexible coal mining machine according to claim 2 or 3, characterized in that: The double-drum cutting head (3) is driven to rotate by the spiral drill rod (2-2).

7. The long-distance double-drum flexible coal mining machine according to claim 1 is characterized in that: The walking part (4) is connected to the conveying part (2) via four independently controlled hydraulic cylinders (4-1).

8. The long-distance double-drum flexible coal mining machine according to claim 1 or 7, characterized in that: The walking part (4) comprises two sets of crawlers (4-2), and an oil tank and a motor are arranged above the crawlers (4-2) to provide power for the hydraulic motor (1-1) of the driving part.

9. The long-distance double-drum flexible coal mining machine according to claim 2 or 3, characterized in that: The spiral drill rod (2-2) of the conveying part is responsible for torque transmission, and the drill rod box (2-1) bears the push-pull force and gravity.

10. The long-distance double-drum flexible coal mining machine according to claim 1, characterized in that: The driving part (1), the conveying part (2) and the walking part (4) adopt a modular design.

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