CN114506626B - Scraper conveyor for coal mining and control method - Google Patents
Scraper conveyor for coal mining and control method Download PDFInfo
- Publication number
- CN114506626B CN114506626B CN202210221711.6A CN202210221711A CN114506626B CN 114506626 B CN114506626 B CN 114506626B CN 202210221711 A CN202210221711 A CN 202210221711A CN 114506626 B CN114506626 B CN 114506626B
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- scraper conveyor
- brake shoe
- ledge
- plate
- groove
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- 239000003245 coal Substances 0.000 title claims abstract description 26
- 238000005065 mining Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000005452 bending Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/20—Traction chains, ropes, or cables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/44—Belt or chain tensioning arrangements
Abstract
The invention relates to a scraper conveyor for coal mining, wherein two ends of the scraper conveyor are provided with hoisting mechanisms, a baffle ledge and a shovel ledge of a middle groove of the scraper conveyor are provided with longitudinal through holes, the machine head and the machine tail are provided with hoisting mechanisms, each hoisting mechanism is provided with two inhaul cables, each inhaul cable penetrates through the through holes on the same side of all the middle grooves, and two ends of each inhaul cable are connected with the hoisting mechanisms; the through hole is provided with a braking mechanism which is used for braking the inhaul cable. The scraper conveyor for coal mining can relieve the bending problem in the running process and the left-right movement problem caused by pushing, and improves the straightness of the scraper conveyor in the running process, so that the friction loss problem between the scraper and the ledge and the chain breakage problem caused by bending of the scraper conveyor are reduced.
Description
Technical Field
The invention relates to a scraper conveyor for coal mining and a control method, and belongs to the technical field of coal mining equipment.
Background
The fully-mechanized coal mining face consists of a coal mining machine, a scraper conveyor, a hydraulic support and other equipment. In the coal exploitation process, the straightness of the scraper conveyor is required to be maintained, the running resistance of the coal mining machine is reduced, and the problems of chain clamping and chain breakage are solved.
As the scraper conveyor is advanced stepwise, there must be a curved section. The influence and control of the curved section was analyzed in the text of "calculation of the length of the curved section of the face scraper conveyor" [ Jiang Xueyun, "coal science technology," 10 th 1985 ]. The bending section is overlong, so that the time for cutting in a beveling way is prolonged, the length of a coal mining working line formed by each working procedure is prolonged, and the cycle time of each coal cutter of the coal cutter is prolonged. The bending section is too short, the included angle between the adjacent middle grooves is too large, and accidents such as breaking the scraper chain or separating grooves from the top, staggered grooves among the grooves and the like can occur during sliding. In addition, when the scraper conveyor is pushed, the stress direction of the bending section hydraulic cylinder is deviated, and the bending section hydraulic cylinder is also a main reason for causing the transverse movement of the scraper conveyor.
Disclosure of Invention
Aiming at the problems, the invention provides a scraper conveyor for coal mining and a method thereof, and the concrete scheme is as follows:
the scraper conveyor for coal mining is characterized in that two ends of the scraper conveyor are respectively provided with a hoisting mechanism, a baffle ledge and a shovel ledge of a middle groove of the scraper conveyor are respectively provided with a longitudinal through hole, the machine head and the machine tail are respectively provided with a hoisting mechanism, each hoisting mechanism is provided with two inhaul cables, each inhaul cable penetrates through the through holes on the same side of all the middle grooves, and two ends of each inhaul cable are connected with the hoisting mechanisms; the through hole is provided with a braking mechanism which is used for braking the inhaul cable.
Further, the braking mechanism comprises a fixed brake shoe and a movable brake shoe which are oppositely arranged, the fixed brake shoe is fixed on the inner side wall of the through hole, the movable brake shoe is arranged on the outer side wall of the through hole, and the movable brake shoe is provided with a driving mechanism for controlling the opening and closing of the movable brake shoe.
Further, the driving mechanism comprises a hydraulic cylinder and a swing arm; the outer side wall of the through hole is provided with a longitudinal long groove, the swing arm is hinged in the long groove through a vertical shaft, and the movable brake shoe is fixed on the inner side part of the swing arm; the swing arm lateral part is equipped with wedge roof, and the pneumatic cylinder is along vertical setting, and the tip of pneumatic cylinder is equipped with the top, and the top is used for promoting wedge roof.
Further, the driving mechanism comprises a hydraulic cylinder and a swing arm; the outer side wall of the through hole is provided with a longitudinal long groove, the swing arm is hinged in the long groove through a vertical shaft, and the movable brake shoe is fixed on the inner side part of the swing arm; the baffle ledge is provided with a longitudinal hydraulic cylinder, the hydraulic cylinder is provided with a plug, the outer side part of the swing arm of the baffle ledge is provided with a wedge-shaped top plate, the hydraulic cylinder is longitudinally arranged, the end part of the hydraulic cylinder is provided with the plug, and the plug is used for pushing the wedge-shaped top plate; the baffle ledge and the shovel plate ledge are connected by a connecting rod.
Furthermore, the inhaul cable is a steel wire rope, a shuttle body is sleeved on the steel wire rope, and the shuttle body is fixed on the steel wire rope through a fastening bolt; the minimum distance between the movable brake shoe and the fixed brake shoe is smaller than the maximum diameter of the shuttle body, and the maximum distance between the movable brake shoe and the fixed brake shoe is larger than the maximum diameter of the shuttle body.
Further, the baffle ledge, the shovel ledge and the middle plate of the middle groove are integrally cast upper matrixes; the shovel plate and the bottom plate of the middle groove are integrally cast lower matrixes; the lower part of the shovel plate ledge of the upper base body is hinged to the inner side part of the shovel plate of the lower base body; the hydraulic support is connected with the lower base body.
Further, the hydraulic cylinder of the baffle ledge is provided with a plugboard, the baffle ledge side of the lower base body is provided with a slot, and the plugboard can be inserted into the slot.
According to the control method of the scraper conveyor for coal mining, when the scraper conveyor is pushed, in the turning section of the scraper conveyor, the movable brake shoe on the ledge side of the middle trough shovel plate of the front half section is closed, the movable brake shoe on the ledge side of the middle trough baffle plate of the rear half section is closed, and a winch at the front end of the scraper conveyor rolls a guy rope.
According to the control method of the scraper conveyor for coal mining, when the scraper conveyor is pushed, the inserting plate of the middle groove of the rear half section is separated from the inserting groove in the turning section of the scraper conveyor.
The scraper conveyor for coal mining can relieve the bending problem in the running process and the left-right movement problem caused by pushing, and improves the straightness of the scraper conveyor in the running process, so that the friction loss problem between the scraper and the ledge and the chain breakage problem caused by bending of the scraper conveyor are reduced.
Drawings
FIG. 1 is a schematic view of a scraper conveyor according to the present invention;
FIG. 2 is a schematic view of the structure of the middle tank in the present invention;
FIG. 3 is a schematic cross-sectional view of a middle trough of the present invention;
fig. 4 is an enlarged schematic view of fig. 3 at S.
Detailed Description
The following describes the aspects of the present invention in detail with reference to specific examples.
Example 1
As shown in fig. 1-4, a scraper conveyor for coal mining is provided with hoisting mechanisms at two ends, a baffle ledge 2 and a shovel ledge 3 of a middle groove 1 of the scraper conveyor are provided with longitudinal through holes 6, a machine head and a machine tail are provided with hoisting mechanisms, each hoisting mechanism is provided with two guys 4, each guy penetrates through the through holes 6 at the same side of all the middle grooves, and two ends of each guy 4 are connected with the hoisting mechanisms; the through hole is provided with a braking mechanism which is used for braking the inhaul cable. The hoisting mechanism can adopt a common hoisting machine 5, traction force can be applied to the two guy ropes 4 when the hoisting machine works, and the two guy ropes 4 can be controlled by adopting two groups of independent hoisting machines or the same group of hoisting machines. The hoist 5 may be fixed to the head or the tail of the scraper conveyor. After the braking mechanism brakes, the stay rope is braked, and when the winch works, the middle groove in a braking state can be pulled by pulling the stay rope. According to the scheme, tension force can be applied between the middle grooves in the pushing process of the scraper conveyor, the offset and dislocation problem caused by unbalanced stress between the middle grooves is avoided, and the middle grooves with offset and dislocation can be straightened.
In the above scheme, the brake mechanism comprises a fixed shoe 7 and a movable shoe 8 which are oppositely arranged, the fixed shoe is fixed on the inner side wall of the through hole, the movable shoe is arranged on the outer side wall of the through hole, and the movable shoe is provided with a driving mechanism for controlling the movable shoe to open and close. The brake of the inhaul cable by the corresponding through hole of the middle groove is realized through the opening and closing of the brake shoe. Wherein, the inside wall refers to the side near the central line of the middle groove, and the outside wall refers to the side far away from the central line of the middle groove.
The structure of the driving mechanism comprises a hydraulic cylinder 9 and a swing arm 10; the outer side wall of the through hole is provided with a longitudinal long groove, the swing arm is hinged in the long groove through a vertical shaft, and the movable brake shoe 8 is fixed at the inner side part of the swing arm; the outside portion of the swing arm is provided with a wedge-shaped top plate, the hydraulic cylinder is arranged along the longitudinal direction, the end part of the hydraulic cylinder is provided with a plug, and the plug is used for pushing the wedge-shaped top plate 11. When the hydraulic cylinder stretches out, the wedge-shaped top plate is pushed to drive the swing arm to deflect inwards, and at the moment, the movable brake shoe on the swing arm is closed relative to the fixed brake shoe, so that braking is realized. When the hydraulic cylinder is retracted, pushing force is not applied to the wedge-shaped top plate any more, and the brake shoe loses braking force to the inhaul cable. In this embodiment, hydraulic cylinders can be arranged on both sides of the middle groove, and the hydraulic cylinders control the brake shoes of the single-side through holes to open and close.
In order to strengthen the braking effect of the braking mechanism on the inhaul cable, the inhaul cable 4 in the scheme is a steel wire rope, a shuttle-shaped body 12 is sleeved on the steel wire rope, and the shuttle-shaped body is fixed on the steel wire rope through a fastening bolt; the minimum distance between the movable brake shoe and the fixed brake shoe is smaller than the maximum diameter of the shuttle body, and the maximum distance between the movable brake shoe and the fixed brake shoe is larger than the maximum diameter of the shuttle body. The improvement can avoid the problem of sliding caused by insufficient braking force of the movable brake shoe and the fixed brake shoe on the inhaul cable, and can improve the tension between the middle grooves when the winch works.
The control method of the scraper conveyor for coal mining comprises the steps that when the scraper conveyor is pushed, in a turning section of the scraper conveyor, a movable brake shoe on the ledge side of a middle trough shovel plate of the front half section is closed, a movable brake shoe on the ledge side of a middle trough baffle plate of the rear half section is closed, and a winch at the front end of the scraper conveyor rolls a guy rope. In the method, the front end of the scraper conveyor is determined according to the pushing direction of the scraper conveyor, and the front end in the pushing direction is the front end.
As shown in figure 1, the middle groove A-D is positioned at the turning section, one end close to the D is the front end, when the middle groove shovel plate ledge side brake shoe of the C-D is pushed, the middle groove baffle ledge side brake shoe of the A-B is closed, the rest brake shoes are opened, and the winch positioned at the front end works. At this time, the middle grooves A-D are all pushed forward by a step distance, the middle groove D is pushed in place, the front end is closed and straightened towards the middle groove on the right side under the action of the tension force of the inhaul cable, and the rear ends of the middle grooves B and C are closed under the action of the tension force of the inhaul cable. Lateral offset and misalignment under the action of lateral moment are prevented.
Example 2
As shown in fig. 3, unlike the drive mechanism of embodiment 1, the drive mechanism of the present embodiment includes a hydraulic cylinder and a swing arm; the outer side wall of the through hole is provided with a longitudinal long groove, the swing arm is hinged in the long groove through a vertical shaft, and the movable brake shoe is fixed on the inner side part of the swing arm; the baffle ledge is provided with a longitudinal hydraulic cylinder, the hydraulic cylinder is provided with a plug, the outer side part of the swing arm of the baffle ledge is provided with a wedge-shaped top plate, the hydraulic cylinder is longitudinally arranged, the end part of the hydraulic cylinder is provided with the plug, and the plug is used for pushing the wedge-shaped top plate; the baffle ledge and the brake shoe of the shovel plate ledge are connected through a connecting rod 13. In the embodiment, the hydraulic cylinder is arranged on one side of the baffle ledge of the middle groove, and when the hydraulic cylinder stretches out, the brake shoe on the side of the baffle ledge is closed, and the brake shoe on the side of the shovel ledge is opened. The improvement can save the use quantity of the hydraulic cylinders, and in addition, the hydraulic cylinders are arranged on the side of the ledge of the shovel plate, so that the problem can be solved.
Example 3
As shown in fig. 3 and 4, the following modifications are made in this embodiment on the basis of embodiment 1 or 2, in which the baffle ledge 2, the shovel ledge 3 and the intermediate plate 17 of the intermediate groove are integrally cast upper base 18; the shovel plate 19 and the bottom plate 20 of the middle groove are integrally cast lower base 21; the lower part of the shovel plate ledge of the upper base body is hinged to the inner side part of the shovel plate of the lower base body; the hydraulic support is connected with the lower base body. The upper base body can rotate along the hinge shaft 16 relative to the lower base body, when a certain bending angle of the scraper conveyor is overlarge, the chain is excessively tensioned, the upper base body automatically deflects, the bending angle is reduced, chain breakage is prevented, and the influence of excessive abrasion of one side of the scraper and the ledge caused by centrifugal force is reduced. Since the hinge shaft is provided on the side of the ledge of the blade, this effect is exhibited only when the scraper conveyor is bent toward the side of the ledge of the baffle.
The hydraulic cylinder of the baffle ledge is provided with a plugboard 14, the baffle ledge side of the lower base body is provided with a slot 15, the plugboard can be inserted into the slot, and the plugboard can be inserted into the slot to realize the locking between the upper base body and the lower base body. When the hydraulic cylinder stretches out and draws back, the control plugboard is inserted into or taken out of the slot. The stroke position of the hydraulic cylinder corresponds to the action position of the plugboard and the brake shoe and is not in conflict.
The control method of the scraper conveyor for coal mining of the embodiment comprises that when the scraper conveyor is pushed, in a turning section of the scraper conveyor, a plugboard of a middle groove of a rear half section is separated from a slot, at the moment, an upper base body and a lower base body are unlocked, the upper base body can rotate relative to the lower base body, and chain breakage of the turning section is avoided.
Claims (4)
1. A control method of a scraper conveyor for coal mining is characterized by comprising the following steps: the two ends of the scraper conveyor are provided with hoisting mechanisms, the baffle ledge and the shovel ledge of the middle groove of the scraper conveyor are provided with longitudinal through holes, the machine head and the machine tail are provided with hoisting mechanisms, each hoisting mechanism is provided with two inhaul cables, each inhaul cable penetrates through the through holes on the same side of all the middle grooves, and the two ends of each inhaul cable are connected with the hoisting mechanisms; the through hole is provided with a braking mechanism which is used for braking the inhaul cable;
the brake mechanism comprises a fixed brake shoe and a movable brake shoe which are oppositely arranged, the fixed brake shoe is fixed on the inner side wall of the through hole, the movable brake shoe is arranged on the outer side wall of the through hole, and the movable brake shoe is provided with a driving mechanism which is used for controlling the movable brake shoe to open and close;
the driving mechanism comprises a hydraulic cylinder and a swing arm; the outer side wall of the through hole is provided with a longitudinal long groove, the swing arm is hinged in the long groove through a vertical shaft, and the movable brake shoe is fixed on the inner side part of the swing arm; the outer side part of the swing arm is provided with a wedge-shaped top plate, the hydraulic cylinder is arranged along the longitudinal direction, the end part of the hydraulic cylinder is provided with a plug, and the plug is used for pushing the wedge-shaped top plate;
the inhaul cable is a steel wire rope, a shuttle body is sleeved on the steel wire rope, and the shuttle body is fixed on the steel wire rope through a fastening bolt; the minimum distance between the movable brake shoe and the fixed brake shoe is smaller than the maximum diameter of the shuttle body, and the maximum distance between the movable brake shoe and the fixed brake shoe is larger than the maximum diameter of the shuttle body;
when the scraper conveyor is pushed, one end of the scraper conveyor, which is positioned at the front along the pushing direction, is the front end, and in the turning section of the scraper conveyor, the movable brake shoe on the ledge side of the middle groove shovel plate of the front half section is closed, and the movable brake shoe on the ledge side of the middle groove baffle plate of the rear half section is closed, so that a winch at the front end of the scraper conveyor scrolls a guy rope.
2. The control method of a scraper conveyor for coal mining according to claim 1, wherein: the baffle ledge, the shovel ledge and the middle plate of the middle groove are integrally cast upper matrixes; the shovel plate and the bottom plate of the middle groove are integrally cast lower matrixes; the lower part of the shovel plate ledge of the upper base body is hinged to the inner side part of the shovel plate of the lower base body; the hydraulic support is connected with the lower base body.
3. The control method of a scraper conveyor for coal mining according to claim 2, wherein: the hydraulic cylinder of the baffle ledge is provided with an inserting plate, the baffle ledge side of the lower base body is provided with an inserting groove, and the inserting plate can be inserted into the inserting groove.
4. A control method of a scraper conveyor for coal mining according to claim 3, wherein: when the scraper conveyor is pushed, the inserting plate of the middle groove of the rear half section is separated from the inserting groove in the turning section of the scraper conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210221711.6A CN114506626B (en) | 2022-03-09 | 2022-03-09 | Scraper conveyor for coal mining and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210221711.6A CN114506626B (en) | 2022-03-09 | 2022-03-09 | Scraper conveyor for coal mining and control method |
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| CN114506626A CN114506626A (en) | 2022-05-17 |
| CN114506626B true CN114506626B (en) | 2024-02-23 |
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