CN109372505B - Coal cutter stop mechanism suitable for large elevation mining angle and wide mining height range working face - Google Patents
Coal cutter stop mechanism suitable for large elevation mining angle and wide mining height range working face Download PDFInfo
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- CN109372505B CN109372505B CN201811507389.3A CN201811507389A CN109372505B CN 109372505 B CN109372505 B CN 109372505B CN 201811507389 A CN201811507389 A CN 201811507389A CN 109372505 B CN109372505 B CN 109372505B
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- 239000003245 coal Substances 0.000 title claims abstract description 112
- 238000005065 mining Methods 0.000 title claims abstract description 85
- 230000000903 blocking effect Effects 0.000 claims abstract description 61
- 239000000463 material Substances 0.000 claims description 102
- 238000003825 pressing Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 2
- 230000005484 gravity Effects 0.000 description 8
- 239000002817 coal dust Substances 0.000 description 6
- 238000007667 floating Methods 0.000 description 6
- 230000002146 bilateral effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/20—General features of equipment for removal of chippings, e.g. for loading on conveyor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/04—Safety devices
Abstract
The invention relates to a coal cutter stop mechanism suitable for a working face with a large elevation mining angle and a wide mining height range, which comprises a machine body stop device and a rocker arm stop device, wherein a machine body primary stop plate of the machine body stop device moves up and down relative to the machine body under the drive of a first telescopic mechanism, a machine body secondary stop plate of the machine body stop device moves up and down relative to the machine body primary stop plate under the drive of a second telescopic mechanism, the rocker arm stop plate of the rocker arm stop device moves in a straight line perpendicular to the extending direction of a rocker arm in a plane parallel to the front side surface of a rocker arm shell under the drive of a third telescopic mechanism, and a safety gap is kept between the foremost end of the machine body stop device and the rocker arm stop device and a rear end tooth cutting surface of a coal cutter drum. The invention can solve the problem of blocking and protecting the lower coal and the float coal in the upward mining state of large mining height and wide mining height range mining, and reduce the possibility of rollover of the coal mining machine.
Description
Technical Field
The invention relates to a material blocking mechanism of a coal cutter, which is particularly suitable for coal comprehensive mechanical exploitation occasions with large elevation angle and wide mining height range working surfaces, and belongs to the technical field of underground coal mining machinery.
Background
The mining of the working face of the coal seam with large elevation mining angle and wide mining height range mainly needs to solve the problems of coal wall collapse prevention and the mining matching of a coal mining machine and a bracket, so that the bracket usually adopts a top beam with a telescopic beam structure and is provided with a secondary side protection plate, and the inclined coal wall face can be supported to the greatest extent after the bracket is unfolded. The coal mining machine is low in plane control to adapt to a locally thinner coal seam and reduce the gravity center of the whole machine to prevent rollover, and meanwhile, the coal mining machine needs a large upper swing angle to keep a rocker arm to mine a thicker coal seam.
However, since the support frame is provided with the telescopic and secondary side protection plate mechanism, the whole top beam is thick, and the top beam is basically close to the top of the coal mining machine body when a local thin coal seam is mined, the top surface of the coal mining machine body is generally not provided with a top protection plate 6 (see figure 2) to avoid increasing the thickness, and the possibility that the gravity center approaches to a supporting point at the guide sliding shoe to increase rollover is avoided, namely, the top surface of the machine body is generally not provided with measures for blocking floating coal. In the actual mining process, particularly for thick coal beds, the rear lower half coal table of the upper coal mined by the front roller and the floating coal of the front roller are far higher than the top surface of the machine body of the coal mining machine, so that a large number of operators slide to the stand column of the support through the top surface of the machine body before the rear roller is mined, and serious potential safety hazards are generated. Although traders strengthen the protection of the net at the upright posts to prevent the flying and smashing injuries caused by massive coal blocks, the personal safety problem of operators cannot be fundamentally solved. At present, the problem is more remarkable under the conditions of large elevation mining angle and wide mining height range working face, especially the coal seam working face with the elevation mining angle exceeding 25 degrees and the coal seam thickness of 2-4 m.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the coal cutter material blocking mechanism which is suitable for the working face with large elevation and wide elevation, can solve the material blocking protection problem of lower coal and float coal in the mining process with large elevation and wide elevation, simultaneously takes the gravity center problem of the coal cutter into consideration, reduces the possibility of rollover of the coal cutter, and improves the adaptability of equipment to the large elevation and elevation.
The main technical scheme of the invention is as follows:
the utility model provides a coal-winning machine stock stop of adaptation big face of adopting of face of adopting height, includes fuselage stock stop and the rocking arm stock stop of installing in fuselage casing front side and rocking arm casing front side of coal-winning machine respectively, fuselage stock stop includes fuselage one-level striker plate and fuselage second grade striker plate, fuselage one-level striker plate is the reciprocating relatively fuselage under the drive of first telescopic machanism, fuselage second grade striker plate is the reciprocating relatively fuselage one-level striker plate under the drive of second telescopic machanism, the rocking arm stock stop includes rocking arm striker plate and third telescopic machanism, the rocking arm striker plate is the relative rocking arm of third telescopic machanism under the drive in the plane that is on a parallel with rocking arm casing front side is perpendicular to rocking arm extending direction's rectilinear motion, keep the safety gap between fuselage stock stop and rocking arm stock stop's the front end and the rear end tooth cutting face of coal-winning machine cylinder.
The first telescopic mechanism adopts a first oil cylinder, a cylinder barrel of the first oil cylinder is vertically fixed on the machine body shell, and the upper end of a cylinder rod of the first oil cylinder is fixedly connected with the upper end of the primary baffle plate of the machine body relatively; the second telescopic mechanism adopts a second oil cylinder, a cylinder barrel of the second oil cylinder is vertically fixed on the first-stage striker plate of the machine body, and the upper end of a cylinder rod of the second oil cylinder is relatively and fixedly connected with the upper end of the second-stage striker plate of the machine body; the third telescopic mechanism adopts a third oil cylinder, a cylinder barrel of the third oil cylinder is fixed on the rocker arm shell along the direction perpendicular to the extending direction of the rocker arm, and the upper end of a cylinder rod of the third oil cylinder is fixedly connected with the top end of the rocker arm baffle plate relatively.
The front side of the machine body shell is preferably provided with a middle groove which extends up and down, the large surface of the rear side of the primary baffle plate of the machine body is correspondingly provided with a lug which extends up and down, and the lug is matched with the middle groove and connected in an up-down sliding way.
The machine body primary material baffle is characterized in that a plate-shaped cavity with an open top is arranged in the machine body primary material baffle, the machine body secondary material baffle is arranged in the plate-shaped cavity and is connected with the machine body primary material baffle in a vertically sliding fit manner, and a cylinder barrel of the second oil cylinder is preferably vertically arranged in the convex block.
The rear large surface of the first-stage striker plate of the machine body is attached to the front side surface of the machine body shell, a first strip hole which extends vertically is further formed in the first-stage striker plate of the machine body, a circle of first annular boss is arranged at the rear part of the inner side of the first strip hole, the front plane of the first annular boss is formed into a first positioning step surface, a first pressing plate penetrates through the first strip hole to be fixed on the front side surface of the machine body shell, a first axial step surface which faces the front side surface of the machine body shell is arranged on the first pressing plate, and the first annular boss is limited between the first axial step surface and the front side surface of the machine body shell; the big laminating of rear side of rocking arm striker plate is in on the rocking arm casing leading flank, also can be equipped with the long hole of its extending direction perpendicular to rocking arm extending direction on the rocking arm striker plate correspondingly, the inboard rear portion in long hole of third is equipped with round third annular boss, the front plane of third annular boss constitutes the third location step face, and the third clamp plate passes long hole of third is fixed on the rocking arm casing leading flank, be equipped with on the third clamp plate towards the third axial step face of rocking arm casing leading flank, the third annular boss limit is located between the third axial step face with the rocking arm casing leading flank.
The beneficial effects of the invention are as follows:
when the coal mining machine provided with the material blocking mechanism of the invention is used for mining the coal seam with thicker upper limit, the material blocking device stretches out and can effectively block the lower coal table and the float coal until the coal is cut by the rear roller and is put into the scraper conveyor, particularly the rocker material blocking device is connected with the machine body material blocking device, so that the coal blocks are thoroughly prevented from sliding to the top surface of the machine body and entering the working space of operators, and the personal safety problem of operators is solved.
When the coal mining machine provided with the material blocking mechanism is used for mining the coal seam with the lower limit, the material blocking device is retracted, and the support telescopic beam can timely extend out of the support coal wall, so that the lateral overturning force of the coal mining machine caused by the outward protrusion of the coal body due to the influence of the ground pressure on the coal wall is reduced, and the safety and stability of the coal mining machine are improved.
The invention is arranged on the coal wall side of the machine body, and the gravity center of the whole machine is far away from the supporting point of the walking part, so that the counterweight is equivalently increased, the possibility of overturning the coal mining machine is greatly reduced, and the safety and stability of the coal mining machine are improved.
The main body of the invention is arranged between the end tooth cutting surface of the rear end of the roller and the side surface of the coal wall of the machine body, and has no influence on normal operations such as beveling of the coal cutter and the like, and the original coal mining process can be maintained; meanwhile, the invention is also positioned between the truncated tooth surface of the tail end tooth of the roller and the bracket expansion Liang Duanmian, and even if the bracket descends to the lower limit of exploitation, the bracket is not affected.
Drawings
FIG. 1a is a schematic general structure of an embodiment of the present invention;
FIG. 1b is a top view of FIG. 1 a;
FIG. 2 is an end view of the present invention when the shearer is mining;
FIG. 3a is a sectional view of the first telescoping mechanism in a retracted state;
FIG. 3b is a schematic cross-sectional view of FIG. 3 a;
FIG. 4 is a cross-sectional view of the first telescoping mechanism in an extended state;
FIG. 5a is a sectional view of the second telescoping mechanism in a retracted state;
FIG. 5b is a schematic cross-sectional view of FIG. 5 a;
FIG. 6 is a cross-sectional view of the first telescoping mechanism in an extended, second telescoping mechanism in a retracted state;
FIG. 7 is a cross-sectional view of the first telescopic mechanism in an extended, second telescopic mechanism in an extended position;
FIG. 8 is a schematic diagram of the connection structure between the components of the primary striker plate of the fuselage of configuration type (1);
FIG. 9 is a top cross-sectional view of the connection between the components of the primary fuselage baffle of configuration (1);
FIG. 10 is a schematic view of the connection between the components of the fuselage secondary dam of configuration type (1);
FIG. 11 is a top cross-sectional view of the connection between the components of the fuselage secondary dam of configuration (1);
FIG. 12 is a cross-sectional view of the third telescoping mechanism in a retracted state;
FIG. 13 is a cross-sectional view of the third telescoping mechanism in an extended state;
FIG. 14a is a schematic view of a partial structure of an embodiment of the fuselage dam assembly;
FIG. 14b is a top view of FIG. 14 a;
FIG. 15a is a schematic view of an embodiment of the rocker arm dam device;
FIG. 15b is a top view of FIG. 15 a;
FIG. 16a is a schematic view of an embodiment of the fuselage dam assembly of construction type (2);
fig. 16b is a top view of fig. 16 a.
Description of the drawings: 1. a machine body material blocking device; 11. a first telescopic mechanism; 111. a first cylinder lower pin; 112. a first cylinder; 113. a first cylinder upper pin; 12. a first-level material baffle of the machine body; 121. a first-stage right baffle plate of the machine body; 122. a first-stage middle baffle plate of the machine body; 123. a first-stage left baffle plate of the machine body; 124. a first connecting pin; 125. a first cross beam; 126. a first connection plate; 127. a bump; 128. a first positioning step surface; 129. a cavity; 130. a first elongated aperture; 131. a first platen; 1312. a first axial step surface; 132. a first screw; 14. a second telescopic mechanism; 141. a second cylinder lower pin; 142. a second cylinder; 143. a second oil cylinder is provided with a pin; 15. a second-level baffle plate of the machine body; 151. a second-stage right baffle plate of the machine body; 152. a material baffle plate in the second stage of the machine body; 153. a second-stage left baffle plate of the machine body; 154. a second connecting pin; 155. a second connecting plate; 161. a protection block; 162. a coal leakage hole is formed; 163. a coal leakage hole is formed; 164. an auxiliary plate; 165. welding blocks;
2. a rocker arm stop device; 21. a third telescopic mechanism; 211. a third cylinder lower pin; 212. a third cylinder; 213. a third oil cylinder is pinned; 22. a rocker arm baffle plate; 230. a third elongated aperture; 231. a third platen; 232. a third screw; 2312. a third positioning step surface; secondly, a rocker arm stop device on the rear rocker arm;
3. a fuselage housing; 31. a top surface of the fuselage housing; 32. the front side of the body shell; 33. a first cylinder hole; 34. a body cylinder connecting hole; 35. a middle groove; 36. a fuselage waist-shaped groove;
4. a rocker arm housing; 41. the top surface of the rocker arm shell; 42. the front side surface of the rocker arm shell; 43. a third cylinder hole; 44. a rocker arm cylinder connecting hole; 45. rocker arm waist type groove;
5. a bracket; 51. a front beam; 52. a second-stage guard board; fifthly, the state of a bracket for high mining height limit mining; fifthly, the state of a bracket for low mining height limit mining;
9. a machine body material blocking device; 91. a right stop device of the machine body; 911. a right baffle plate; 912. a right inner baffle plate; 92. a stop device in the machine body; 921. a middle baffle plate; 922. a middle inner baffle plate; 93. a left stop device of the machine body; 931. a left baffle plate; 932. left inner baffle.
Detailed Description
The invention discloses a coal cutter stop mechanism (simply called as stop mechanism) which is suitable for a working surface with a large elevation and a wide mining height range, and as shown in figures 1-16, the coal cutter stop mechanism comprises a machine body stop device 1 and a rocker arm stop device 2 which are respectively arranged on the front side of a machine body shell 3 and the front side of a rocker arm shell 4 of the coal cutter. The machine body material blocking device comprises a machine body primary material blocking plate 12, a machine body secondary material blocking plate 15, a first telescopic mechanism 11 and a second telescopic mechanism 14, wherein the machine body primary material blocking plate moves up and down relative to the machine body in a plane parallel to the front side 32 of the machine body shell under the driving of the first telescopic mechanism 11, and the machine body secondary material blocking plate moves up and down relative to the machine body primary material blocking plate in a plane parallel to the front side 32 of the machine body shell under the driving of the second telescopic mechanism 14. The rocker arm stop device comprises a rocker arm stop plate 22 and a third telescopic mechanism 21, wherein the rocker arm stop plate is driven by the third telescopic mechanism to do linear motion relative to a rocker arm in a plane parallel to the front side surface 42 of the rocker arm shell, and the linear motion is perpendicular to the extending direction of the rocker arm (the direction is also perpendicular to the large surface of the top surface of the rocker arm shell in general). And a safety gap is kept between the forefront ends of the machine body material blocking device and the rocker arm material blocking device and the rear end tooth cutting surface of the coal cutter drum.
When installing a support and a coal mining machine, the distance between the rearmost end of the movable parts of the machine body stop device and the rocker arm stop device and the foremost end plane possibly reached by the support is ensured, the effect after installation is shown as shown in fig. 2, the main bodies of the machine body stop device and the rocker arm stop device are arranged between the rear end tooth cutting surface of the roller and the front side large plane of the machine body shell (namely, in the gap A), and the whole body stop device and the rocker arm stop device are arranged between the rear end tooth cutting surface of the roller and the front end plane of the support 5 (namely, in the gap B). Since the movable parts of the machine body and rocker arms stop do not affect the lifting of the stand, it is possible to accommodate various intermediate conditions from a stand condition 5 "of low-mining-height limit mining to a stand condition 5' of high-mining-height limit mining. In fact, since the striker plate is substantially well below the top beam of the bracket (including the side protection plate) when the mining height is large, there is generally no risk of interference, and maintaining a space between the rearmost end of the movable member and the forwardmost plane that the bracket may reach is mainly considered to be the problem of interference prevention in the low mining height state.
When the first telescopic mechanism and the second telescopic mechanism are in the fully retracted state, the highest point of the whole body of the first-stage material baffle plate and the second-stage material baffle plate of the machine body is positioned at a position slightly higher than the shell of the machine body, and when the third telescopic mechanism is in the fully retracted state, the highest point of the rocker arm material baffle plate is positioned at a position slightly higher than the shell of the rocker arm. When mining lower coal seams, particularly near the lowest mining height range, each dam typically need not extend or need only extend a small amount; when a higher coal seam is mined, the machine body material blocking device needs to do the action of extending the material blocking plate, the rocker arms swing upwards, and meanwhile, the rocker arm material blocking device synchronously does the action of extending the material blocking plate so as to be matched with the action of blocking the coal at a high position on the coal wall side of the coal mining machine. When the first telescopic mechanism and the second telescopic mechanism are in the fully extended state, the positions of the highest points of the primary material baffle of the main body and the secondary material baffle of the main body are determined according to the height of coal to be intercepted when the corresponding coal mining machine is at the maximum limit mining height, but are generally lower than the bottom surface of the support 5 when the secondary guard plate 52 is in the retracted state.
The upper portion that the rocking arm striker plate is close to fuselage one end is provided with the chamfer to guarantee that the rocking arm striker plate can not interfere with fuselage one-level striker plate after swinging up along with the rocking arm. The size of the chamfer can be determined by combining the size of the upper swing angle of the rocker arm, and the chamfer can be large enough to ensure that a safe distance is reserved between the rocker arm baffle plate and the primary baffle plate of the machine body.
The first telescopic mechanism and the second telescopic mechanism are preferably provided with a plurality of sets respectively, and are arranged in a bilateral symmetry mode respectively.
In the high mining limit mining support state 5', although new coal walls can be cut out and protected by the front beam 51 and the secondary protection plate 52 which are stretched out, the floating coal and the coal table which are cut by the front roller are far higher than the top surface of the coal cutter body, so that the rocker arm baffle 22 of the rocker arm baffle device 2 on the front rocker arm and the primary baffle 12 and/or the secondary baffle 15 of the body baffle device 1 and the rocker arm baffle plate of the rocker arm baffle device 2' on the rear rocker arm stretch out through the action of the corresponding oil cylinders to effectively block the floating coal and the loose coal table, and keep the floating coal and the loose coal table on the side of the coal wall which is far away from the center of gravity of the coal cutter until the rear roller cuts and loads the scraper conveyor, thereby avoiding potential safety hazards to operators caused by sliding the floating coal or the coal body which collapses to the rear lower side through the rocker arm shell top surface 41 and the body shell top surface 31, and particularly having more remarkable effects in large-pitch mining angle and larger-thickness coal seam mining.
In the low mining height limit mining stand state 5", the stand is lowered to be close to the top surface 31 of the body shell, but the operation of the stand is not affected because of enough safe anti-collision gaps between the stand and the retracted body stop device 1 and the rocker arm stop device 2.
Because the gravity centers of the machine body material blocking device and the rocker arm material blocking device are always far away from the limit (front rocker arm lifting) gravity center of the whole coal mining machine and are positioned on the coal wall side of the coal mining machine, the whole gravity center distance of the coal mining machine can be greatly increased, and the side turning overturning moment caused by the collapse of loose coal bodies to the coal mining machine is effectively prevented.
In the embodiment shown in the drawings, the first telescopic mechanism adopts a first oil cylinder 112, a first oil cylinder hole 33 is formed in the body shell, a cylinder barrel of the first oil cylinder is vertically arranged in the first oil cylinder hole, the lower end of the first oil cylinder is fixed on the body shell through a first oil cylinder lower pin 111 arranged at the lower part of the first oil cylinder hole, the upper end of a cylinder rod of the first oil cylinder extends out of the first oil cylinder hole and is exposed above the top surface 31 of the body shell, and the upper end of the first oil cylinder upper pin 113 is relatively and fixedly connected with the upper end of the first-stage baffle plate of the body. The first oil cylinder lower pin is perpendicular to the front side surface of the machine body shell. The first cylinder upper pin is parallel to the front side surface of the machine body shell and the top surface of the machine body shell.
The second telescopic mechanism adopts a second oil cylinder 142, a cylinder barrel of the second oil cylinder is vertically fixed on the first-stage striker plate of the machine body, and the upper end of a cylinder rod of the second oil cylinder is relatively and fixedly connected with the upper end of the second-stage striker plate of the machine body.
The third telescopic mechanism adopts a third oil cylinder 212, a third oil cylinder hole 43 is formed in the rocker arm shell, a cylinder barrel of the third oil cylinder is arranged in the third oil cylinder hole along the direction perpendicular to the extending direction of the rocker arm, the lower end of the cylinder barrel of the third oil cylinder is fixed on the rocker arm shell through a third oil cylinder lower pin 211 arranged at the lower part of the third oil cylinder hole, the upper end of a cylinder rod of the third oil cylinder extends out of the third oil cylinder hole and is exposed above the top surface 41 of the rocker arm shell, and the upper pin 213 of the third oil cylinder is fixedly connected with the top end of the rocker arm stop plate relatively. And the lower pin of the third oil cylinder is perpendicular to the front side surface of the rocker arm shell. The third cylinder upper pin is parallel to the front side surface of the rocker arm shell and the top surface of the rocker arm shell. The rocker arm shell is also provided with a rocker arm oil cylinder connecting hole 44 for providing an operation space for mounting and fixing the third oil cylinder.
The front side of the machine body shell is provided with a middle groove 35 which extends up and down, the large surface of the rear side of the machine body primary baffle plate is provided with a lug 127 which extends up and down, the lug is matched with the middle groove and is connected with the middle groove in a vertical sliding way, and the connection plays a role in longitudinal positioning and guiding the machine body primary baffle plate. The middle groove is an up-down through groove and can be used for assisting coal leakage.
The machine body primary material baffle is internally provided with a plate-shaped cavity 129 with an open top, and the machine body secondary material baffle is arranged in the plate-shaped cavity and is connected with the machine body primary material baffle in an up-down sliding fit manner. The cylinder barrel of the second oil cylinder is vertically arranged in the convex block, the lower end of the cylinder barrel of the second oil cylinder is connected to the primary material baffle of the machine body through a lower pin 141 of the second oil cylinder, and the upper end of a cylinder rod of the second oil cylinder is relatively and fixedly connected with the upper end of the secondary material baffle of the machine body through an upper pin 143 of the second oil cylinder. The second oil cylinder lower pin and the second oil cylinder upper pin are horizontally parallel to the front side surface of the machine body shell. The cavity in the bump for accommodating the second cylinder tube is in front-back communication with the cavity 129. The machine body shell is also provided with a machine body oil cylinder connecting hole 34 for providing a mounting cavity for a joint of the first oil cylinder, an oil pipe and the like and an operation space during mounting and fixing.
The big laminating of the rear side of fuselage one-level striker plate is in on the fuselage casing leading flank 32, be equipped with the first rectangular hole 130 of vertical extension on the fuselage one-level striker plate, the inboard rear portion in first rectangular hole is equipped with round first annular boss, the front plane of first annular boss constitutes first location step face 128. The first pressing plate 131 passes through the first long strip hole and is fixed in the body kidney-shaped groove 36 on the front side of the body shell through the first screw 132, a first axial step surface 1312 facing the front side of the body shell is arranged on the first pressing plate, and the first annular boss is limited between the first axial step surface and the front side of the body shell. The first pressing plate mainly plays a role in positioning the primary baffle plate of the machine body perpendicular to the direction of the coal wall.
The big laminating of rear side of rocking arm striker plate is in on the rocking arm casing leading flank 42, be equipped with its extending direction perpendicular to rocking arm extending direction's the rectangular hole 230 of third on the rocking arm striker plate, the inboard rear portion in the rectangular hole of third is equipped with round third annular boss, the front plane of third annular boss constitutes third location step face 2312, and third clamp plate 231 passes in the rectangular hole of third is fixed in the rocking arm kidney slot 45 on the rocking arm casing leading flank through third screw 232, be equipped with on the third clamp plate towards the third axial step face of rocking arm casing leading flank, the annular boss of third is limited to be located between the third axial step face and the rocking arm casing leading flank. The third pressing plate plays a role in positioning the rocker arm material baffle plate perpendicular to the direction of the coal wall and a role in guiding the rectilinear movement of the rocker arm material baffle plate.
The dam mechanism is also preferably provided with one or more of the following auxiliary structures:
1. an upper coal leakage hole 162 can be formed in the primary baffle plate of the machine body, and the upper coal leakage hole is communicated with the plate-shaped cavity. When the machine body secondary baffle plate stretches out, an opening is formed at the corresponding position of the primary baffle plate and possibly enters the coal material, and when the machine body secondary baffle plate retracts, the coal material in the machine body secondary baffle plate can be extruded out through the upper coal leakage hole.
The parts of the first-stage baffle plate of the machine body, which are positioned at the front side and the rear side of the plate-shaped cavity, are respectively a front side plate and a rear side plate, the bottoms of the front side plate and the rear side plate can be connected through a plurality of ribs which are arranged at intervals, and a lower coal leakage hole 163 is formed between every two adjacent ribs. Because the second-stage baffle plate of the machine body is arranged in the first-stage baffle plate of the machine body and can stretch up and down, the possibility that coal dust enters the plate-shaped cavity is guaranteed, and once the coal dust enters, the coal dust can leak through the lower coal leakage hole. In addition, the ribs connect the front side plate and the rear side plate of the primary striker plate of the machine body, so that the strength of the primary striker plate of the machine body is also improved. In order to reduce the coal dust entering the plate-shaped cavity, sealing structures such as felts and the like can be arranged at the top of the first-stage baffle plate of the machine body and close to the edges of the gaps where the two-stage baffle plates are matched with each other.
2. The left and right edges of the main body primary material baffle are respectively fixed with an auxiliary plate 164, the auxiliary plates are attached to the front side surface of the main body primary material baffle, and are shielded in front of the adjacent ends of the corresponding rocker arm material baffle, so that coal dust is prevented from being extruded into or crossing the coal mining machine from a gap between the main body primary material baffle and the rocker arm material baffle in a low-mining-height state, and coal leakage is prevented.
3. The front side of the rocker arm shell is also provided with a strip-shaped welding block 165, the welding block is positioned between the roller on the corresponding rocker arm and the rocker arm baffle plate in the left-right direction and keeps a gap with the roller and the rocker arm baffle plate, and the welding block is shielded at the corresponding end part of the rocker arm baffle plate and is used for preventing the roller from rotating to squeeze coal dust between the rocker arm baffle plate and the side surface of the rocker arm shell.
4. The material blocking mechanism can be further provided with a plurality of protection blocks 161 which are dispersedly and fixedly arranged on the top surfaces of the machine body shell and the rocker arm shell, and are close to the rear sides of the corresponding material blocking plates, and the highest points of the protection blocks are slightly higher than the highest points of the corresponding machine body material blocking devices and the corresponding rocker arm material blocking devices in the retraction state. The protection block can prevent the corresponding striker plate from being bumped by the bracket due to front-back dislocation of the bracket in the lowest height-picking state.
The structural style of the machine body material blocking device can be selected from the following two choices:
(1) As shown in fig. 1, 8 and 9, the first-stage striker plate 12 is formed by sequentially splicing and fixing a first-stage left striker plate 123, a first-stage middle striker plate 122 and a first-stage right striker plate 121, which are arranged in a left-right manner, wherein the edges of the first-stage striker plate and the first-stage middle striker plate are in concave-convex jogged, and are connected through a plurality of first connecting pins 124 which are arranged at intervals up and down. The rear upper end edge of the primary fuselage stopper plate 12 is integrally reinforced by being connected to a first cross member 125. In this embodiment, be connected with first connecting plate 126 on the first crossbeam, first connecting plate is the biconvex ear structure of backward overhang, all is equipped with horizontal extension's about pinhole on the biconvex ear, the upper end of the jar pole of first hydro-cylinder is located between the biconvex ear of first connecting plate, wears to establish simultaneously the round pin on the first hydro-cylinder, the joint has realized jointly in the participation of first crossbeam, first connecting plate, first hydro-cylinder upper pin the upper end of the jar pole of first hydro-cylinder with the connection of the upper end of fuselage one-level striker plate.
The first telescopic mechanism is provided with two sets of bilateral symmetry, and simultaneously drives the first-stage striker plate of the machine body to realize lifting. The two sets of the convex blocks are matched with the corresponding middle grooves in a bilateral symmetry mode, the two convex blocks are respectively arranged on the first-stage left baffle plate and the first-stage right baffle plate of the machine body, and a set of second oil cylinders is arranged in each convex block.
As shown in fig. 1, 10 and 11, the second-stage striker 15 is formed by sequentially splicing and fixing a left-stage striker 153, a middle-stage striker 152 and a right-stage striker 151, and is connected by a plurality of second connecting pins 154 which are arranged at intervals up and down. The edge of the upper end part of the rear side of the machine body secondary material baffle 15 is connected with a second connecting plate 155, the second connecting plate is structurally identical to the first connecting plate, and the upper end of a cylinder rod of the second cylinder is connected with the upper end of the machine body secondary material baffle through the second connecting plate and a second cylinder upper pin.
(2) As shown in fig. 16, the body stop device 9 includes a left body stop device 93, a middle body stop device 92 and a right body stop device 91 which are separated from each other, and each of the separated devices is provided with the first body stop plate, the second body stop plate, the first telescopic mechanism and the second telescopic mechanism. The left striker plate 931 in the left striker device 93 of the main body is a first striker plate of the main body, and the left inner striker plate 932 is a second striker plate of the main body; the middle baffle 921 in the middle baffle device of the machine body is a first baffle of the machine body, and the middle inner baffle 922 is a second baffle of the machine body; the right striker plate 911 in the right striker device of the machine body is a first striker plate of the machine body, and the right inner striker plate 912 is a second striker plate of the machine body. The left material blocking device of the machine body, the middle material blocking device of the machine body and the right material blocking device of the machine body are mutually independent, the operation is flexible, and the connection strength and the operation convenience of the machine body are improved.
With reference to a shearer, the term "forward" as used herein refers to a direction toward the coal wall and "rearward" refers to a direction away from the coal wall.
The invention can protect the float coal of the front roller in a large mining height state, effectively prevent the coal from sliding to the space where an operator is located behind when crossing the machine body of the coal mining machine, simultaneously realize the limit mining in a low mining height state of the bracket, reduce the risk of side turning of the coal mining machine, and particularly have obvious advantages when mining on a large elevation mining angle and a wide mining height range of 20-30 degrees.
Claims (10)
1. The utility model provides a coal-winning machine stock stop of adaptation big face upward adopts angle, wide range working face of adopting which characterized in that: the rocker arm material blocking device comprises a rocker arm material blocking plate and a rocker arm material blocking device, wherein the rocker arm material blocking device and the rocker arm material blocking device are respectively arranged on the front side of a machine body shell of the coal mining machine and the front side of the rocker arm shell, the machine body material blocking device comprises a first-stage material blocking plate and a second-stage material blocking plate, the first-stage material blocking plate of the machine body moves up and down relative to the machine body under the driving of a first telescopic mechanism, the second-stage material blocking plate of the machine body moves up and down relative to the first-stage material blocking plate of the machine body under the driving of a second telescopic mechanism, the rocker arm material blocking plate comprises a rocker arm material blocking plate and a third telescopic mechanism, the rocker arm material blocking plate makes linear motion perpendicular to the extending direction of the rocker arm relative to the rocker arm in a plane parallel to the front side of the rocker arm shell under the driving of the third telescopic mechanism, and a safety gap is kept between the foremost end of the machine material blocking device and the rear end tooth cutting face of a drum of the coal mining machine; the first telescopic mechanism adopts a first oil cylinder, a cylinder barrel of the first oil cylinder is vertically fixed on the machine body shell, and the upper end of a cylinder rod of the first oil cylinder is fixedly connected with the upper end of the primary baffle plate of the machine body relatively; the second telescopic mechanism adopts a second oil cylinder, a cylinder barrel of the second oil cylinder is vertically fixed on the first-stage striker plate of the machine body, and the upper end of a cylinder rod of the second oil cylinder is relatively and fixedly connected with the upper end of the second-stage striker plate of the machine body; the third telescopic mechanism adopts a third oil cylinder, a cylinder barrel of the third oil cylinder is fixed on the rocker arm shell along the direction perpendicular to the extending direction of the rocker arm, and the upper end of a cylinder rod of the third oil cylinder is fixedly connected with the top end of the rocker arm baffle plate relatively; when the first telescopic mechanism and the second telescopic mechanism are in the fully extended state, the positions of the highest points of the first-stage material baffle plate and the second-stage material baffle plate of the machine body are determined according to the height of coal to be intercepted when the maximum limit mining height of the corresponding coal mining machine is reached.
2. The shearer dam mechanism for adapting to large elevation mining angles and wide mining height range working surfaces of claim 1, wherein: the front side of the machine body shell is provided with a middle groove which extends up and down, the large surface of the rear side of the primary baffle plate of the machine body is provided with a lug which extends up and down, and the lug is matched with the middle groove and is connected in an up-down sliding way.
3. The shearer dam mechanism for adapting to large elevation mining angles and wide mining height range working surfaces as claimed in claim 2, wherein: the machine body primary material baffle is characterized in that a plate-shaped cavity with an open top is arranged in the machine body primary material baffle, the machine body secondary material baffle is arranged in the plate-shaped cavity and is connected with the machine body primary material baffle in a vertically sliding fit manner, and a cylinder barrel of the second oil cylinder is vertically arranged in the convex block.
4. The shearer dam mechanism for adapting to large pitch angle and wide mining height range working surface as claimed in claim 3, wherein: the rear large surface of the first-stage striker plate of the machine body is attached to the front side surface of the machine body shell, a first strip hole which extends vertically is formed in the first-stage striker plate of the machine body, a circle of first annular boss is formed in the rear portion of the inner side of the first strip hole, the front plane of the first annular boss is formed into a first positioning step surface, a first pressing plate penetrates through the first strip hole to be fixed on the front side surface of the machine body shell, a first axial step surface which faces the front side surface of the machine body shell is formed in the first pressing plate, and the first annular boss is limited between the first axial step surface and the front side surface of the machine body shell; the big laminating of rear side of rocking arm striker plate is in on the rocking arm casing leading flank, be equipped with its extending direction perpendicular to rocking arm extending direction's the long hole of third on the rocking arm striker plate, the inboard rear portion in long hole of third is equipped with round third annular boss, the front plane of third annular boss constitutes the third location step face, and the third clamp plate passes the long hole of third is fixed on the rocking arm casing leading flank, be equipped with on the third clamp plate towards the third axial step face of rocking arm casing leading flank, the third annular boss limit is located between the third axial step face and the rocking arm casing leading flank.
5. The shearer dam mechanism for adapting to large pitch angle and wide mining height range working surface according to claim 4, wherein: the machine body primary baffle plate is provided with an upper coal leakage hole, the upper coal leakage hole is communicated with the plate-shaped cavity, the parts of the machine body primary baffle plate, which are positioned at the front side and the rear side of the plate-shaped cavity, are respectively a front side plate and a rear side plate, the bottoms of the front side plate and the rear side plate are connected through a plurality of ribs which are arranged at intervals, and a lower coal leakage hole is formed between every two adjacent ribs.
6. The shearer dam mechanism for adapting to large pitch angle and wide mining height range working surface according to claim 4, wherein: the left edge and the right edge of the primary material baffle of the machine body are respectively fixed with an auxiliary plate, the auxiliary plates are attached to the front side face of the primary material baffle of the machine body, and are shielded in front of the adjacent ends of the corresponding rocker arm material baffles.
7. The shearer dam mechanism for adapting to large pitch angle and wide mining height range working surface according to claim 4, wherein: the front side of the rocker arm shell is also provided with a strip-shaped welding block, the welding block is positioned between the roller on the corresponding rocker arm and the rocker arm baffle plate and keeps a gap with the roller on the corresponding rocker arm and the rocker arm baffle plate, and the welding block is shielded at the corresponding end part of the rocker arm baffle plate.
8. The shearer dam mechanism for adapting to large pitch angle and wide mining height range working surface according to claim 4, wherein: the rocker arm type material blocking device is characterized by further comprising a plurality of protection blocks, wherein the protection blocks are fixed on the top surfaces of the body shell and the rocker arm shell in a dispersing mode, and the highest points of the protection blocks are respectively higher than the highest points of the corresponding body material blocking device and rocker arm material blocking device in a retraction state.
9. The shearer loader stop of claim 1, 2, 3, 4, 5, 6, 7 or 8 adapted to large face pitch and wide range of face heights, wherein: the structural style of the machine body material blocking device has the following two choices: (1) The first-stage material baffle of the machine body is formed by splicing and fixing a first-stage left material baffle of the machine body, a first-stage middle material baffle of the machine body and a first-stage right material baffle of the machine body in turn left and right; the machine body secondary material baffle is formed by splicing and fixing a machine body secondary left material baffle, a machine body secondary middle material baffle and a machine body secondary right material baffle in turn left and right; (2) The machine body material blocking device comprises a machine body left material blocking device, a machine body middle material blocking device and a machine body right material blocking device which are mutually separated, and each separated device is respectively provided with a machine body primary material blocking plate, a machine body secondary material blocking plate, a first telescopic mechanism and a second telescopic mechanism.
10. The shearer dam mechanism for adapting to large face pitch angle and wide face pitch height range according to claim 1 or 2, wherein: the rear large surface of the first-stage striker plate of the machine body is attached to the front side surface of the machine body shell, a first strip hole which extends vertically is formed in the first-stage striker plate of the machine body, a circle of first annular boss is formed in the rear portion of the inner side of the first strip hole, the front plane of the first annular boss is formed into a first positioning step surface, a first pressing plate penetrates through the first strip hole to be fixed on the front side surface of the machine body shell, a first axial step surface which faces the front side surface of the machine body shell is formed in the first pressing plate, and the first annular boss is limited between the first axial step surface and the front side surface of the machine body shell; the big laminating of rear side of rocking arm striker plate is in on the rocking arm casing leading flank, be equipped with its extending direction perpendicular to rocking arm extending direction's the long hole of third on the rocking arm striker plate, the inboard rear portion in long hole of third is equipped with round third annular boss, the front plane of third annular boss constitutes the third location step face, and the third clamp plate passes the long hole of third is fixed on the rocking arm casing leading flank, be equipped with on the third clamp plate towards the third axial step face of rocking arm casing leading flank, the third annular boss limit is located between the third axial step face and the rocking arm casing leading flank.
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| CN201811507389.3A CN109372505B (en) | 2018-12-11 | 2018-12-11 | Coal cutter stop mechanism suitable for large elevation mining angle and wide mining height range working face |
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| CN201811507389.3A CN109372505B (en) | 2018-12-11 | 2018-12-11 | Coal cutter stop mechanism suitable for large elevation mining angle and wide mining height range working face |
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| CN109372505B true CN109372505B (en) | 2024-04-09 |
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