Long distance double drum flexible coal mining machine

Abstract

The application discloses a long-distance double-roller flexible coal mining machine, which comprises a driving part, a double-roller cutting head, a conveying part and a walking part. The driving part drives the rotation of a spiral drill rod through a hydraulic motor, the spiral drill rod drives the cutting head to cut a coal seam, and the gear and rack system is used to realize the advancing and retreating of the equipment. The conveying part adopts a flexible drill rod box structure, the spiral drill rod transmits torque, the drill rod box bears the pushing and pulling force, the angle between the drill rod boxes is adaptively adjusted according to the actual terrain change, and the vibration and impact generated during the drilling process of the equipment are reduced. The double-roller cutting head adaptively adjusts the coal mining height, and meets the efficient coal mining demand under different height coal seams. The walking part supports the equipment through a track to reduce the bottom lying amount as much as possible, and the angle of the equipment is adjusted through a hydraulic oil cylinder to meet the demand of the coal mining operation in the horizontal, downward and upward directions. The application has the advantages of high efficiency, stability and strong adaptability, and is suitable for long-distance coal mining operation in complex coal seams.

Description

Technical Field

[0001] This invention belongs to the field of coal mining machine technology, and particularly relates to a long-distance double-drum flexible coal mining machine. Background Technology

[0002] With increasing coal mining depth and more complex mining conditions, the adaptability and efficiency of traditional coal mining equipment in complex coal seams are significantly limited. Rigidly connected drill rod structures struggle to adapt to coal seam undulations and geological changes, easily leading to severe vibrations and impacts due to concentrated loads. Furthermore, traditional coal mining equipment has limited operating distances, failing to meet the demands of long-distance mining. The auger drill rods of traditional equipment typically bear both torque and thrust simultaneously, resulting in uneven stress distribution and affecting system stability and performance. In soft coal seams, the direct contact pressure between the drill rod and the coal seam creates by traditional equipment is relatively high, easily causing coal seam collapse or equipment jamming, further reducing mining efficiency. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide a long-distance double-drum flexible coal mining machine, which adopts a double-drum cutting head to adapt to the undulations of the coal seam, and mines coal with high efficiency. Through the flexible connection design of the auger drill rod and drill rod box, it can achieve adaptive adjustment, adapt to complex geological conditions, and reduce the vibration and impact generated by the equipment during drilling. It is suitable for complex coal seam and long-distance mining operations.

[0004] Technical solution: The present invention provides a long-distance double-drum flexible coal mining machine, comprising a drive unit, a conveying unit, a double-drum cutting head, and a traveling unit; the drive unit is placed above the traveling unit, one end of the conveying unit is connected to the drive unit, and the other end is connected to the double-drum cutting head; the drive unit provides power to the double-drum cutting head through the conveying unit.

[0005] Furthermore, the drive unit includes a drive motor and a travel motor. The drive motor is connected to the spiral drill rod of the conveying unit via a pin shaft to provide torque transmission. The drive unit housing is fixedly connected to the drill rod box of the conveying unit. The travel motor drives the gear rack to realize the drilling and retraction of the coal mining machine.

[0006] Furthermore, a rack is provided below the drive unit, and the walking motor drives the rack and pinion mechanism to push the auger drill rod and the cutting head forward, thereby realizing long-distance coal mining operations.

[0007] Furthermore, the conveying unit includes a drill rod box, a spiral drill rod, a flexible connection part of the drill rod box, and a flexible connection part of the spiral drill rod; the flexible connection part of the drill rod box includes a male connector, a female connector, and pin III; the flexible connection part of the spiral drill rod includes a male connector, a female connector, a cross shaft, a limiting block, pin II, and pin I.

[0008] Furthermore, the male and female connectors in the flexible connection part of the drill pipe box are fixed to both ends of the drill pipe box by welding. The horizontal axis of the male connector is inserted into the cylindrical groove of the female connector and fixed and positioned by pin III. The male and female connectors of the flexible connection part of the spiral drill pipe are fixed to both ends of the spiral drill pipe by threads. The limiting block is fixed to the end face of the female connector by screws, and the cross shaft is fixed in the middle of the female connector.

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

[0010] Furthermore, the dual-drum cutting head is driven by the rotation of a spiral drill rod and can adapt to the undulations of the coal seam for high-efficiency coal mining.

[0011] Furthermore, the walking unit is used to support and move the coal mining machine, and to ensure that the equipment can move smoothly during operation and adapt to the terrain changes of complex coal seams.

[0012] Furthermore, the traveling unit is connected to the conveying unit via four independently controlled hydraulic cylinders, which can adjust the coal mining height and angle to meet the needs of downward mining, upward mining, and horizontal mining operations.

[0013] Furthermore, the walking unit includes two sets of tracks, with an oil tank and a motor installed above the tracks to provide power to the hydraulic motor of the drive unit.

[0014] Furthermore, the spiral drill rod of the conveying unit is responsible for torque transmission, and the drill rod box bears the pushing and pulling force and gravity, which optimizes the mechanical performance of the system, reduces the uneven stress on the structure, and significantly improves the working distance of the coal mining machine.

[0015] Furthermore, the drive unit, conveying unit, and walking unit adopt a modular design, making each component easy to disassemble and maintain, thereby improving the operating efficiency and service life of the equipment.

[0016] Preferably, the conveying section is a flexible drill rod box structure suitable for complex coal seams. This structure allows for angle adjustment within a certain range while the auger drill rod transmits torque and the drill rod box bears the push and pull forces, making the equipment operate more smoothly under complex geological conditions, thereby improving conveying efficiency and equipment operation stability.

[0017] Specifically, the auger drill pipe includes a drill pipe cylinder, auger blades, and a flexible connecting part; the drill pipe box includes a sliding bearing seat, a drill pipe box body, and a flexible connecting part. Both can adaptively adjust their angle to pass through the coal seam when it fluctuates.

[0018] The long-distance flexible coal mining machine of the present invention adopts a combination of hydraulic motor drive and gear rack propulsion, which 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 significant advantages:

[0020] 1. Through the flexible connection design of the auger drill rod and drill rod box, it can make adaptive adjustments within a certain angle range to adapt to complex coal seam terrain, reduce impact vibration and stress concentration, and improve operational stability.

[0021] 2. The auger drill rod is only responsible for torque transmission, while the drill rod box bears the pushing and pulling forces and gravity, thus avoiding the operational instability caused by load superposition in traditional structures. This division of labor optimizes the mechanical performance of the system and reduces uneven stress on the structure, effectively extending the working distance of the coal mining machine.

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

[0023] 4. The angle of the drill pipe box of the present invention is adjustable, and different height limit blocks 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 needs of different working conditions, ensuring the flexibility of the equipment while effectively preventing structural stress or operational instability caused by excessive angle.

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

[0025] 6. The walking mechanism adopts a double track design to minimize the amount of time spent on the bottom, effectively reducing damage to the bottom of the coal seam during mining operations and ensuring that the coal mining machine moves smoothly under complex coal seam conditions.

[0026] 7. The traveling mechanism is equipped with four independently adjustable hydraulic cylinders, which can realize mining operations at different angles, including downward mining, upward mining, and multi-angle mining, adapting to various coal seam dip angles and improving operational flexibility and applicability. Attached Figure Description

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

[0028] Figure 2 Schematic diagram of the drive unit of the coal mining machine;

[0029] Figure 3 This is a top view of the connection between the two drill rod boxes of the coal mining machine's traveling section;

[0030] Figure 4 This is a schematic diagram of the flexible connection part of the auger drill pipe;

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

[0032] Figure 6 This is a structural diagram of the walking mechanism;

[0033] In the diagram, 1-drive unit, 1-1-drive motor, 1-2-travel motor, 1-3-gear and rack, 1-4-drive unit housing, 2-conveying unit, 2-1-drill rod box, 2-2-auger drill rod, 2-3-flexible connection of drill rod box, 2-3-1-male connector one, 2-3-2-pin III, 2-3-3-female connector one, 2-4-flexible connection of auger drill rod, 2-4-1-auger drill rod male connector, 2-4-2-limiting block, 2-4-3-spring pin, 2-4-4-auger drill rod female connector, 2-4-5-cross shaft, 2-4-6-pin II, 2-4-7-pin I, 3-double roller cutting head, 4-travel unit, 4-1-hydraulic cylinder, 4-2-travel track, 4-3-support beam. Detailed Implementation

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

[0035] like Figure 1 As shown, a long-distance double-drum flexible coal mining machine mainly includes a drive unit 1, a conveying unit 2, a double-drum cutting head 3, and a traveling unit 4. The working principle is that the drive motor 1-1 of the drive unit 1 drives the spiral drill rod 2-2 to rotate, transmitting power to the double-drum cutting head 3 to achieve efficient cutting of the coal seam. The cut coal falls into the drill rod box 2-1 and is conveyed to the scraper conveyor by the spiral drill rod 2-2. During drilling, the drive unit 1 drives the gear and rack mechanism 1-3 through the traveling motor 1-2, causing the conveying unit 2 and the double-drum cutting head 3 to move forward. Simultaneously, the drill rod box 2-1 of the conveying unit 2 is connected section by section, and the double-drum cutting head 3 can adaptively adjust according to the coal seam height. During retraction, the drive unit reverses the direction, driving the conveying unit 2 and the double-drum cutting head 3 backward, and the drill rod box 2-1 is disassembled section by section, allowing the double-drum cutting head 3 to exit the borehole.

[0036] like Figure 2As shown, the drive unit 1 mainly consists of a drive motor 1-1, a travel motor 1-2, a gear and rack 1-3, and a drive unit housing 1-4. The drive motor 1-1 is connected to the auger drill rod 2-2 via pin II 2-4-6, and is responsible for transmitting torque to the double-drum cutting head 3. The drive unit housing 1-4 is connected to the drill rod box 2-1, and the travel motor 1-2 drives the gear and rack 1-3 to move, thereby realizing the drilling and retraction control of the drilling rig.

[0037] like Figure 3 As shown, the conveying unit 2 mainly consists of a drill pipe box 2-1, a spiral drill pipe 2-2, a flexible connecting part 2-3 of the drill pipe box, and a flexible connecting part 2-4 of the spiral drill pipe. The drill pipe box supports the spiral drill pipe through sliding bearings, which are composed of split bearing bushes to reduce rotational friction and enhance structural stability. The flexible connecting part 2-3 of the drill pipe box is welded to both ends of the drill pipe box 2-1, and the flexible connecting part 2-4 of the spiral drill pipe is fixed to both ends of the spiral drill pipe 2-2 by a spiral.

[0038] like Figure 4 As shown, the flexible connection part 2-3 of the drill pipe box includes a male connector 2-3-1, a pin Ⅲ 2-3-2, and a female connector 2-3-3. The female connector 2-3-3 has a cylindrical groove of a certain depth in the axial direction, with tapered sides and a through hole in the vertical direction. The male connector 2-3-1 extends a certain length of horizontal shaft to mate with the cylindrical groove of the female connector 2-3-3, and then the pin Ⅲ 2-3-2 is inserted for positioning. Specifically, the male connector 2-3-1 has tapered inclined surfaces on both sides, and both the male connector 2-3-1 and the female connector 2-3-3 are fixed to both ends of the drill pipe box 2-1 by welding. This design allows the drill pipe box 2-1 to flexibly adjust its angle within a certain range, avoiding equipment jamming or damage due to complex coal seam terrain.

[0039] like Figure 5As shown, the flexible connection part 2-4 of the auger drill pipe includes an auger drill pipe male connector 2-4-1, a limiting block 2-4-2, a spring pin 2-4-3, an auger drill pipe female connector 2-4-4, a cross shaft 2-4-5, a pin II 2-4-6, and a pin I 2-4-7. Specifically, the male connector 2-4-1 and the female connector 2-4-4 have different through holes in the radial direction. The cross shaft 2-4-5 passes through the through hole of the male connector 2-4-1 through the pin I 2-4-7 and is fixed in the middle of the auger drill pipe male connector 2-4-1. The limiting block 2-4-2 is fixed to the end face of the male connector 2-4-1 by threads and is located behind the cross shaft 2-4-5. Pin II 2-4-6 passes through the hole in pin I 2-4-7 and the hole in the cross shaft 2-4-5, enabling the male connector 2-4-1 to mate with the female connector 2-4-4. The spring pin 2-4-3 passes into the hole in pin II 2-4-6 to limit the movement of pin II 2-4-6. This structure allows the auger drill rod 2-2 to self-adjust within a certain angle range, adapting to complex coal seam terrain and reducing impact vibration and stress concentration.

[0040] like Figure 6 As shown, the traveling unit 4 includes hydraulic cylinders 4-1, traveling tracks 4-2, and support beams 4-3. The traveling tracks 4-2 are responsible for moving the working face of the coal mining machine. The support beams 4-3 are welded to the traveling tracks, and four hydraulic cylinders 4-1 are placed on the support beams. The extension and retraction of the hydraulic cylinders 4-1 control the coal mining height and angle. The support beams 4-3 support the drive unit 1 and the conveying unit 2 of the coal mining machine.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A longwall twin drum flexible coal shearer characterised in that, The utility model provides a double drum cutting head drilling rig, including drive part (1), conveying part (2), double drum cutting head (3) and walking part (4), drive part (1) is placed in the upper walking part (4), one end of conveying part (2) is connected with drive part (1), and the other end is connected with double drum cutting head (3), drive part (1) provides power for double drum cutting head (3) through conveying part (2), The conveying part (2) includes a drill pipe box (2-1), a screw drill pipe (2-2), a drill pipe box flexible connection part (2-3), and a screw drill pipe flexible connection part (2-4). The drill pipe box flexible connection part (2-3) includes a male connector one (2-3-1), a female connector one (2-3-3), and a pin shaft III (2-3-2). The female connector one (2-3-3) has a cylindrical slot of a certain depth in the axial direction, the two sides of the slot have a certain taper, and a through hole is provided in the vertical direction. The male connector one (2-3-1) has a certain length of transverse shaft that cooperates with the cylindrical slot of the female connector one (2-3-3), and then a pin shaft III (2-3-2) is inserted to realize positioning. The two sides of the male connector one (2-3-1) are provided with tapered inclined surfaces. The male connector one (2-3-1) and the female connector one (2-3-3) are fixed on both ends of the drill pipe box (2-1) by welding. The screw drill pipe flexible connection part (2-4) includes a male connector (2-4-1), a female connector (2-4-4), a cross shaft (2-4-5), a limiting block (2-4-2), a pin shaft II (2-4-6), and a pin shaft I (2-4-7). The male connector (2-4-1) and the female connector (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 connector (2-4-1) through the pin shaft I (2-4-7) and is fixed in the middle of the screw drill pipe male connector (2-4-1). The limiting block (2-4-2) is fixed on the end face of the male connector (2-4-1) by screwing 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 butt joint of the male connector (2-4-1) and the female connector (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).

2. A longwall twin drum flexible coal face machine according to claim 1 wherein, The drive part (1) includes a drive motor (1-1) and a walking motor (1-2). The drive motor (1-1) is connected with the screw drill pipe (2-2) of the conveying part (2) through the pin shaft II (2-4-6) to provide torque transmission. The drive part housing (1-4) is fixedly connected with the drill pipe box (2-1) of the conveying part (2). The walking motor (1-2) drives the gear rack (1-3) to realize the drilling and retraction of the coal mining machine.

3. A longwall twin drum flexible coal face machine according to claim 1 or 2 wherein, In the structure of the drill pipe box (2-1), the screw drill pipe (2-2) in the conveying part (2) is supported in the drill pipe box (2-1) by a sliding bearing composed of split bushings.

4. A longwall twin drum flexible coal face machine according to claim 1 or 2 wherein, The double drum cutting head (3) is driven to rotate by the screw drill pipe (2-2).

5. The longwall twin drum flexible coal face machine of claim 1, wherein, The walking part (4) is connected with the conveying part (2) through four independently controlled hydraulic oil cylinders (4-1).

6. A longwall twin drum flexible coal face machine according to claim 1 or 5, characterised in that, The walking part (4) includes two sets of caterpillar belts (4-2), and oil tanks and motors are arranged above the caterpillar belts (4-2) to provide power for the driving motor (1-1).

7. A longwall twin drum flexible coal face machine according to claim 1 or 2, characterised in that, The screw drill rod (2-2) of the conveying part is responsible for torque transmission, and the drill rod box (2-1) bears the pushing and pulling force and gravity.

8. The longwall twin drum flexible coal face machine of claim 1, wherein, The driving part (1), the conveying part (2) and the walking part (4) adopt a modular design.

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