CN107654229B - Large-mining-height shearer-preventing coal cutter - Google Patents
Large-mining-height shearer-preventing coal cutter Download PDFInfo
- Publication number
- CN107654229B CN107654229B CN201711122182.XA CN201711122182A CN107654229B CN 107654229 B CN107654229 B CN 107654229B CN 201711122182 A CN201711122182 A CN 201711122182A CN 107654229 B CN107654229 B CN 107654229B
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- 239000003245 coal Substances 0.000 title claims abstract description 62
- 238000005065 mining Methods 0.000 claims abstract description 68
- 230000007246 mechanism Effects 0.000 claims abstract description 66
- 238000005520 cutting process Methods 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C31/00—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
- E21C31/02—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for cutting or breaking-down devices
- E21C31/04—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for cutting or breaking-down devices imparting both a rotary and reciprocating motion
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
- E21C25/10—Rods; Drums
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
Abstract
The large mining height anti-caving coal cutter has two ends connected to the rotating mechanism and the cutting mechanism separately; the rotating mechanism consists of a shell, a rotating motor arranged in the shell, a transmission mechanism of the rotating motor and two auxiliary hydraulic cylinders arranged on the shell of the rotating mechanism and the shell of the machine body; the rocker arm of the cutting mechanism is connected with a height-adjusting hydraulic cylinder arranged on the shell of the rotating mechanism; the cutting drum is eccentric. The coal cutter can enable the cutting mechanism to incline to one side of a coal wall to be mined through the rotating mechanism, and the cut coal wall presents a certain inclination angle, so that the ledge can be effectively prevented without external reinforcement; when the rotating mechanism rotates, two auxiliary hydraulic cylinders are used as main parts for bearing force, the cutting height of the cutting roller is regulated by a height regulating hydraulic cylinder arranged on a rotating mechanism shell and a rocker arm, and the equipment is not easy to damage during operation, so that safe production can be ensured; the upper end line and the lower end line of the inclined cutting roller are kept horizontal, so that the horizontal pushing of the mining working face can be ensured.
Description
Technical Field
The invention relates to the mining technology, in particular to a large mining height anti-caving coal cutter.
Background
In recent years, with the maturation of coal mining technology and the continuous improvement of mine mining equipment, large mining height working surfaces of 3.5m to 6m are increasingly put into mining and production. The large mining height working face has remarkable advantages from the aspects of coal resource quality and mining efficiency, but the problem of ledge is increasingly remarkable when the existing coal mining machine is adopted for mining, and the personal safety of staff on the large mining height working face is seriously influenced.
The existing coal mining machine generally consists of a machine body capable of moving along a scraper conveyor and cutting mechanisms connected with two ends of the machine body. The cutting mechanism consists of a rocker arm with one end hinged with the machine body and a cutting roller connected with the other end of the rocker arm, and the upper and lower heights of the cutting roller are adjusted by a hydraulic cylinder with one end hinged with the machine body and the other end hinged with the rocker arm. When coal is mined, the coal mining surface is vertical up and down due to the vertical state of the cutting roller, so that the coal mining surface is used for a large mining height working surface, and the ledge cannot be prevented. In order to prevent the lasting, the following methods are currently adopted:
The method is to realize the ledge prevention by injecting water into the shallow Kong Dongya of the coal seam. Although the method can prevent the ledge of the exploitation surface to a certain extent, a large amount of water needs to be injected into the coal seam, the working procedure is complex, the quality and the heat value of exploited coal are greatly reduced, and a large amount of water needs to be injected into the well, so that the water conveying pipeline is additionally added, and the production cost of enterprises is increased.
Another method is to prevent the coal wall caving and the front roof caving by a hydraulic bracket. The method needs to reform the original hydraulic support, and also considers the mutual matching relation between the hydraulic support and the coal mining machine in the mining process, so that the method has poor applicability to the mining working face with extra-large mining height.
Yet another method is to prevent coal wall spalling by grouting the coal wall. Although the method can effectively reduce the probability of mining the facing sides, the mined coal and slurry are solidified together, so that the quality of the coal is affected, and the screening and selection are not easy.
The fourth method is to incline the whole machine of the coal mining machine forwards to prevent the ledge. Although the method can prevent the ledge to a certain extent, the whole machine is inclined, so that the pressure on the sliding shoes at one side is increased, the service life of the sliding shoes is accelerated, the whole machine of the coal mining machine is easy to tilt to a certain extent, and the mining efficiency of a working face is greatly affected.
CN106437701a discloses an anti-shearer. The coal cutter drives the rocker arm to rotate up and down by using a rotating member which is arranged on the cutter body and can rotate up and down, so as to adjust the cutting height of the cutting roller; the motor and the gear transmission mechanism which are fixedly arranged in the rotating member are utilized to drive the rocker arm fixedly connected with the driven gear to axially rotate, and the cutting roller is driven to incline, so that the surface of the cut coal bed and a coal mining area show a certain inclination angle, and the aim of preventing the caving is fulfilled. Although the coal cutter can enable the rocker arm to drive the cutting roller to incline in theory, the following technical problems actually exist:
1. because the rocker arm and the roller of the large mining height coal mining machine are very heavy in mass, and the roller bears huge load in the cutting process, the rocker arm is directly fixedly connected with a driven gear in a gear transmission mechanism, the gear transmission mechanism is extremely damaged due to overlarge stress, and underground safe production and high-efficiency coal mining cannot be guaranteed.
2. The specification does not give a method for rotating the rotating member, the cutting height of the cutting drum is adjusted by rotating the rotating member, and all the gravity of the rocker arm and the cutting drum are applied to the rotating member, so that the safe operation of the equipment is difficult to ensure.
3. When the traditional drum of the coal mining machine cuts in an inclined state, the advancing direction of the mining surface can be inclined downwards continuously, the horizontal advancing direction of the original coal seam is deviated, the exploration mining layer is deviated, and the mining efficiency is low.
4. As can be seen from the drawings in the specification, the gear transmission mechanism of the coal mining machine is arranged in the machine body, two gears meshed with each other are transmitted side by side, the longitudinal height of the machine body of the coal mining machine is obviously increased, the center of the coal mining machine is upwards deviated, and the rocker arm and the roller of the coal mining machine easily cause the coal mining machine to turn over when the rocker arm and the roller tilt forwards; and this configuration is not easily implemented due to limited space downhole.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a large mining height anti-caving coal cutter.
The invention provides a large mining height anti-caving coal cutter, which comprises a machine body capable of moving along a scraper conveyor; two ends of the machine body are respectively connected with the rotating mechanism; the rotating mechanism is connected with the cutting mechanism.
The rotating mechanism comprises a rotating mechanism shell, a rotating motor, a speed reducer, a transmission shaft, a fixed support shaft, a first auxiliary hydraulic cylinder and a second auxiliary hydraulic cylinder; the rotating motor is fixedly arranged in the rotating mechanism shell, the rotating motor is connected with the fixed support shaft through the speed reducer and the transmission shaft, and the fixed support shaft is fixedly arranged in the machine body shell; the rotating mechanism shell is hinged with the machine body shell through a first auxiliary hydraulic cylinder and a second auxiliary hydraulic cylinder.
The cutting mechanism comprises a rocker arm and a cutting roller connected with the rocker arm through a transmission shaft; the rear end of the rocker arm is hinged with the rotating mechanism shell through a height-adjusting hydraulic cylinder arranged on the rotating mechanism shell; the cutting roller is an eccentric cutting roller with the inclination of 10-30 degrees.
Compared with the prior art, the coal mining machine has the following beneficial effects:
1. The cutting mechanism can incline to one side of the coal mining face through the rotating mechanism, so that the surface of the cut coal seam and the coal mining area present a certain inclination angle, the ledge can be effectively prevented without external reinforcement, the manpower and material resources are saved, and the production cost is reduced.
2. The rotation of the rotating mechanism is completed by the motor and the transmission mechanism thereof together with the two auxiliary hydraulic cylinders, and the two auxiliary hydraulic cylinders are used as main components for bearing force, so that the rotating mechanism is not easy to damage and the production safety in the pit is ensured.
3. The cutting height of the cutting roller is adjusted by a height-adjusting hydraulic cylinder which is arranged on the rotating mechanism shell and hinged with the rocker arm, so that the safe operation of the equipment can be ensured when the cutting height is adjusted.
4. The eccentric cutting roller with inclination is adopted, and the upper end line and the lower end line of the inclined eccentric cutting roller are parallel to the horizontal plane, so that effective cutting of coal beds at the top plate and the bottom plate can be realized to the greatest extent, and meanwhile, the horizontal pushing of a coal exploitation working surface can be ensured, and the defect that the pushing direction of the working surface is inclined downwards after the conventional roller is inclined is avoided.
4. The invention can adjust the inclination angle between the coal seam surface and the coal mining area at any time according to the change of the mining height, and is matched with the eccentric cutting roller with different inclinations for use, thereby being applicable to the ledge protection of the coal seam with different mining heights and having wide application range.
5. The rotating mechanism has compact structure and is not limited by underground limited space.
Drawings
FIG. 1 is a schematic view (three-dimensional perspective view) of a large mining height shearer of the present invention;
FIG. 2 is a transverse cross-sectional view of the rotary mechanism of FIG. 1 taken along the right side;
FIG. 3 is a longitudinal cross-sectional view of the rotary mechanism of FIG. 1 taken along the left side;
FIG. 4 is a side view of FIG. 1;
FIG. 5 is a schematic view of the shearer of FIG. 1 for high mining.
The symbols in the drawings illustrate: 1-a scraper conveyor; 2-a cutting drum; 3-a rotary mechanism housing; 4-a fuselage shell; 5-a first auxiliary hydraulic cylinder; 6-rocker arms; 7-scraping plates; 8-heightening the hydraulic cylinder; 9-walking slipper; 10-guiding sliding shoes; 11 (of the rocker arm and of the rotary mechanism housing); 12-pin rows; 13-a second auxiliary hydraulic cylinder; 14-a motor fixing plate; 15-a decelerator; 16-a transmission shaft; 17-fixing a supporting shaft; 18-a support shaft fixing plate; 19-fixing plate fastening bolts; 4-a fuselage shell; 20-supporting a shaft support plate; 21-a rotating electric machine; 22-rotating electric machine fastening bolts; 23-coal wall mining.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the large mining height anti-caving coal cutter of the invention comprises a machine body which can move along a scraper conveyor 1; two ends of the machine body are respectively connected with the rotating mechanism; the rotating mechanism is connected with the cutting mechanism. Wherein the scraper conveyor is provided with a pin row 12 and a scraper 7; the lower part of the machine body of the coal mining machine is provided with a traveling skid shoe 9 and a guide skid shoe 10 which are hinged with the machine body shell 4, and the traveling skid shoe is guided by the guide skid shoe which can move along the pin row, so that the coal mining machine can travel on the scraper conveyor, and the mined coal is transported away through the scraper.
Referring to fig. 2 and 3, the rotating mechanism includes a rotating mechanism housing 3, a rotating electric machine 21, a speed reducer 15, a transmission shaft 16, a fixed support shaft 17, a first auxiliary hydraulic cylinder 5, and a second auxiliary hydraulic cylinder 13; wherein the rotating electric machine is fixedly installed in the rotating mechanism housing by the motor fixing plate 14 and the rotating electric machine fastening bolt 22, the rotating electric machine is connected with the fixed support shaft through the speed reducer and the transmission shaft, and the fixed support shaft is fixedly installed in the body housing by the support shaft support plate 20, the support shaft fixing plate 18 and the fixing plate fastening bolt 19; the rotating mechanism shell is hinged with the machine body shell through a first auxiliary hydraulic cylinder 5 and a second auxiliary hydraulic cylinder 13.
With reference to figures 1,2 and 4, the cutting mechanism comprises a rocker arm 6 and a cutting drum 2 connected to the rocker arm by a transmission shaft (not shown); the middle part of the rocker arm is hinged with the rotating mechanism shell through a hinge shaft 11, the lower end of the rocker arm is hinged with a hydraulic rod of a height-adjusting hydraulic cylinder 8 which is hinged on the rotating mechanism shell, and the rocker arm is rotated by taking the hinge shaft as the center through the expansion and contraction of the hydraulic rod of the height-adjusting hydraulic cylinder, so that the cutting height of the cutting roller is adjusted; as shown in fig. 4, the cutting drum is an eccentric cutting drum with a slope of 10 ° to 30 ° (the specific slope is selected according to different mining heights).
In connection with fig. 5, the shearer is used for mining large mining heights, and an eccentric cutting drum with an inclination of alpha is selected and matched with the height H of the mining coal wall 23 and the required inclination angle alpha of the mining coal wall. In the mining process, the rotary mechanism and the cutting mechanism at two ends are driven by the machine body to reciprocate on the scraper conveyor, the rotary motor in the rotary mechanism and the first auxiliary hydraulic cylinder and the second auxiliary hydraulic cylinder hinged with the rotary mechanism shell are used for mutually matching to complete the rotary action of the rotary mechanism, the cutting mechanism is inclined to one side of the mining coal wall, at the moment, the upper end line and the lower end line of the cutting roller are kept parallel to the horizontal plane, and the cut mining coal wall can present an inclination angle alpha, so that the aim of preventing the ledge is fulfilled.
The invention can adjust the inclination angle of the mining wall according to the change of the mining height, and is matched with the eccentric cutting roller with different inclinations to be used for preventing the caving protection during the mining of the coal beds with different mining heights.
Claims (1)
1. A large mining height anti-caving coal mining machine comprises a machine body which can move along a scraper conveyor (1); two ends of the machine body are respectively connected with the rotating mechanism; the rotating mechanism is connected with the cutting mechanism; the method is characterized in that:
the cutting mechanism comprises a rocker arm (6) and a cutting roller (2) connected with the rocker arm through a transmission shaft; the rear end of the rocker arm is hinged with the rotating mechanism shell through a height-adjusting hydraulic cylinder (8) arranged on the rotating mechanism shell; the central axis of the cutting roller (2) is in an inclined state, the inclination angle between the central axis and the horizontal plane is alpha, and the alpha is 10-30 degrees;
The rotating mechanism comprises a rotating mechanism shell (3), a rotating motor (21), a speed reducer (15), a transmission shaft (16), a fixed support shaft (17), a first auxiliary hydraulic cylinder (5) and a second auxiliary hydraulic cylinder (13); the rotating motor is fixedly arranged in the rotating mechanism shell, the rotating motor is connected with the fixed support shaft through the speed reducer and the transmission shaft, and the fixed support shaft is fixedly arranged in the machine body shell (4); the rotary motor, the first auxiliary hydraulic cylinder hinged with the rotary mechanism shell and the second auxiliary hydraulic cylinder are mutually matched to complete the rotary action of the rotary mechanism, so that the cutting mechanism inclines to one side of the coal mining wall, the central axis of the cutting roller is parallel to the horizontal plane, and the cut coal mining wall presents an inclination angle alpha.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711122182.XA CN107654229B (en) | 2017-11-14 | 2017-11-14 | Large-mining-height shearer-preventing coal cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711122182.XA CN107654229B (en) | 2017-11-14 | 2017-11-14 | Large-mining-height shearer-preventing coal cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107654229A CN107654229A (en) | 2018-02-02 |
| CN107654229B true CN107654229B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711122182.XA Active CN107654229B (en) | 2017-11-14 | 2017-11-14 | Large-mining-height shearer-preventing coal cutter |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139001A (en) * | 2018-10-31 | 2019-01-04 | 攀枝花学院 | Double-ended shearer for large-mining-height working surface |
| US11761333B2 (en) | 2020-11-16 | 2023-09-19 | Joy Global Underground Mining Llc | Cutting assembly for longwall mining system |
| WO2022104193A1 (en) | 2020-11-16 | 2022-05-19 | Joy Global Underground Mining Llc | Cutting assembly for longwall mining system |
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| CN107654229A (en) | 2018-02-02 |
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