CN114506626A - Scraper conveyor for coal mining and control method - Google Patents

Scraper conveyor for coal mining and control method Download PDF

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Publication number
CN114506626A
CN114506626A CN202210221711.6A CN202210221711A CN114506626A CN 114506626 A CN114506626 A CN 114506626A CN 202210221711 A CN202210221711 A CN 202210221711A CN 114506626 A CN114506626 A CN 114506626A
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China
Prior art keywords
scraper conveyor
brake shoe
ledge
coal mining
swing arm
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Granted
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CN202210221711.6A
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Chinese (zh)
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CN114506626B (en
Inventor
朱旺虎
杜新利
于鲁晋
薛新顺
郑孟善
马天伦
赵俊岩
陈鑫
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Jiaozuo Shenhua Heavy Machinery Manufacturing Co ltd
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Jiaozuo Shenhua Heavy Machinery Manufacturing Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G19/00Conveyors 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
    • B65G19/18Details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G19/00Conveyors 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
    • B65G19/18Details
    • B65G19/20Traction chains, ropes, or cables
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G23/00Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
    • B65G23/44Belt or chain tensioning arrangements

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ship Loading And Unloading (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

The invention relates to a scraper conveyor for coal mining, wherein both ends of the scraper conveyor are provided with hoisting mechanisms, both baffle ledge and shovel ledge of a middle groove of the scraper conveyor are provided with longitudinal through holes, both the machine head and the machine tail are provided with hoisting mechanisms, the hoisting mechanisms are provided with two guys, each guy runs through the through holes on the same side of all the middle grooves, and both ends of each guy are connected with the hoisting mechanisms; the through hole is provided with a braking mechanism which is used for braking the pull rope. The scraper conveyor for coal mining can reduce the bending problem in the operation process and the left and right play problem caused by pushing, and improve the straightness of the scraper conveyor in the operation process, thereby reducing the friction loss problem between the scraper and the ledge and the chain breakage problem caused by the bending of the scraper conveyor.

Description

Scraper conveyor for coal mining and control method
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 coal fully mechanized mining working surface is composed of a coal mining machine, a scraper conveyor, a hydraulic support and the like. In the coal mining process, the straightness of the scraper conveyor needs to be maintained, the running resistance of the coal mining machine is reduced, and the problems of chain blocking and chain breaking are reduced.
When the scraper conveyor is pushed forward step by step, a bent section is inevitably formed. In the article "calculation of bent section length of face scraper conveyor" [ Jiangyu (Jiangyu, coal science and technology, 1985, 10 th era ], influence and control of bent section were analyzed. The bending section is too long, thereby increasing the time of beveling feed, prolonging the length of a coal mining operation line formed by each procedure and prolonging the cycle time of each cut of coal of the coal mining machine. The bending section is too short, the included angle between adjacent middle grooves is too large, and accidents such as top breakage or top groove separation of the scraper chain and groove staggering between chutes can occur during sliding. In addition, when the hydraulic cylinder is pushed, the force direction of the hydraulic cylinder at the bending section is deviated, which is also a main cause of the transverse movement of the scraper conveyor.
Disclosure of Invention
Aiming at the problems, the invention provides a scraper conveyor and a method for coal mining, and the specific scheme is as follows:
a kind of coal mining uses the drag conveyor, both ends of the drag conveyor have hoisting mechanisms, baffle ledge and shovel board ledge of the middle trough of the drag conveyor have longitudinal through holes, said aircraft nose and aircraft tail have hoisting mechanisms, the hoisting mechanism has two guys, each guy runs through the through hole of the same side of all middle troughs, both ends of the guy are connected with hoisting mechanism; the through hole is provided with a braking mechanism which is used for braking the pull rope.
Furthermore, 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, the movable brake shoe is provided with a driving mechanism, and the driving mechanism is used for controlling the brake shoe to open and close.
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 elongated slot, the swing arm is hinged in the elongated slot through a vertical shaft, and the movable brake shoe is fixed on the inner side part of the swing arm; swing arm outside portion is equipped with the 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 the 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 elongated slot, the swing arm is hinged in the elongated slot through a vertical shaft, and the movable brake shoe is fixed on the inner side part of the swing arm; a longitudinal hydraulic cylinder is arranged on the baffle ledge, the hydraulic cylinder is provided with a top head, a wedge-shaped top plate is arranged at the outer side part of the swing arm of the baffle ledge, the hydraulic cylinder is arranged along the longitudinal direction, the end part of the hydraulic cylinder is provided with the top head, and the top head is used for pushing the wedge-shaped top plate; the baffle ledge and the movable brake shoe of the shovel board ledge are connected through a connecting rod.
Furthermore, the inhaul cable is a steel wire rope, a shuttle-shaped body 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 spacing between the movable brake shoe and the fixed brake shoe is smaller than the maximum diameter of the shuttle body, and the maximum spacing 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 board ledge and the middle board of the middle trough 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 with the inner side part of the shovel plate of the lower base body; the hydraulic support is connected with the lower base body.
Furthermore, the hydraulic cylinder of the baffle ledge is provided with an inserting plate, the side of the baffle ledge of the lower base body is provided with a slot, and the inserting plate can be inserted into the slot.
When the scraper conveyor is pushed, in the turning section of the scraper conveyor, a movable brake shoe on the ledge side of a middle groove shovel plate of the front half section is closed, a movable brake shoe on the ledge side of a middle groove baffle plate of the rear half section is closed, and a winch at the front end of the scraper conveyor rolls a pull rope.
In another control method of the scraper conveyor for coal mining, when the scraper conveyor is pushed, the insert plate of the middle groove in the rear half section is separated from the slot in the turning section of the scraper conveyor.
The scraper conveyor for coal mining can reduce the bending problem in the operation process and the left and right play problem caused by pushing, and improve the straightness of the scraper conveyor in the operation process, thereby reducing the friction loss problem between the scraper and the ledge and the chain breakage problem caused by the bending of the scraper conveyor.
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 of the present invention;
FIG. 3 is a schematic cross-sectional view of a center tank of the present invention;
fig. 4 is an enlarged view of S in fig. 3.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to specific examples.
Example 1
As shown in fig. 1-4, the two ends of the scraper conveyor are provided with hoisting mechanisms, the baffle ledge 2 and the shovel ledge 3 of the middle groove 1 of the scraper conveyor are provided with longitudinal through holes 6, the machine head and the machine tail are provided with hoisting mechanisms, the hoisting mechanisms are provided with two guys 4, each guy runs through the through holes 6 on the same side of all the middle grooves, and the 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 pull rope. The hoisting mechanism can adopt a common hoisting machine 5, traction force can be applied to the guy cables 4 when the hoisting machine works, and the two guy cables 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 tail of the scraper conveyor. After the braking mechanism brakes, the pull rope is braked, and at the moment, when the winch works, the middle groove in a braking state can be pulled through the traction pull rope. This scheme can be at scraper conveyor pass in-process, applys a tensile force between each middle part groove, avoids skew, the dislocation problem that produces because of unbalanced atress between each middle part groove to can play the alignment effect to the middle part groove that produces the skew dislocation.
In the above scheme, the brake mechanism comprises a fixed brake shoe 7 and a movable brake shoe 8 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, the movable brake shoe is provided with a driving mechanism, and the driving mechanism is used for controlling the brake shoe to open and close. The brake of the corresponding through hole of the middle groove to the inhaul cable is realized through the opening and closing of the movable brake shoe. Wherein, the inner side wall is the side close to the central line of the middle groove, and the outer side wall is the side far away from the central line of the middle groove.
The driving mechanism structurally comprises a hydraulic cylinder 9 and a swing arm 10; the outer side wall of the through hole is provided with a longitudinal elongated slot, the swing arm is hinged in the elongated slot through a vertical shaft, and the movable brake shoe 8 is fixed on the inner side part of the swing arm; swing arm outside portion is equipped with the 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 11. When the hydraulic cylinder extends out, the swing arm can be driven to deflect towards the inner side by pushing the wedge-shaped top plate, and the movable brake shoe on the swing arm is closed relative to the fixed brake shoe at the moment, so that braking is realized. When the hydraulic cylinder retracts, thrust is not applied to the wedge-shaped top plate any more, and the brake shoe loses the braking force on the inhaul cable. In this embodiment, hydraulic cylinders can be arranged on the ledges at the two sides of the middle trough, and the hydraulic cylinders control the opening and closing of the movable brake shoes of the through holes at the single side.
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 spacing between the movable brake shoe and the fixed brake shoe is smaller than the maximum diameter of the shuttle body, and the maximum spacing 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 sliding problem caused by insufficient braking force of the movable brake shoe and the fixed brake shoe on the inhaul cable, and can improve the tension force 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 groove shovel plate of the front half section is closed, a movable brake shoe on the ledge side of a middle groove baffle plate of the rear half section is closed, and a winch at the front end of the scraper conveyor rolls a stay rope. In this method, the leading end of the scraper conveyor is determined according to the moving direction of the scraper conveyor, and the leading end is the end located forward in the moving direction.
As shown in figure 1, the middle grooves A-D are in the turning section, one end close to D is the front end, when the middle groove A-D is pushed, the middle groove shovel plate ledge side movable brake shoe of C-D is closed, the middle groove baffle ledge side movable brake shoe of A-B is closed, the rest movable brake shoes are opened, and the winch positioned at the front end works. At the moment, the middle grooves A-D are pushed forwards by a step pitch, the middle groove D is pushed in place, the front ends of the middle grooves A-D are drawn together and straightened towards the middle groove on the right side under the tensioning force of the inhaul cable, and the rear ends of the middle grooves B and C are drawn together under the tensioning force of the inhaul cable. Prevent the generation of lateral offset and dislocation under the action of lateral moment.
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 elongated slot, the swing arm is hinged in the elongated slot through a vertical shaft, and the movable brake shoe is fixed on the inner side part of the swing arm; a longitudinal hydraulic cylinder is arranged on the baffle ledge, the hydraulic cylinder is provided with a top head, a wedge-shaped top plate is arranged at the outer side part of the swing arm of the baffle ledge, the hydraulic cylinder is arranged along the longitudinal direction, the end part of the hydraulic cylinder is provided with the top head, and the top head is used for pushing the wedge-shaped top plate; the baffle ledge and the movable brake shoe of the shovel board 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, when the hydraulic cylinder extends out, the movable brake shoe on the side of the baffle ledge is closed, and the movable brake shoe on the side of the shovel board ledge is opened. This improvement can save the pneumatic cylinder use quantity, and it is great to set up the pneumatic cylinder degree of difficulty in addition at shovel board ledge side, and this difficult problem can be solved to this embodiment.
Example 3
Referring to fig. 3 and 4, this embodiment is modified from embodiment 1 or 2 in that the baffle ledge 2, the shovel ledge 3 and the intermediate plate 17 of the center trough are integrally cast as an upper base 18; the shovel plate 19 and the bottom plate 20 of the middle groove are integrally cast lower basal bodies 21; the lower part of the shovel plate ledge of the upper base body is hinged with 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 hinged shaft 16 relative to the lower base body, when the bending angle of a certain section of the scraper conveyor is too large, the chain is excessively tensioned, the upper base body automatically deflects, the bending angle is reduced, the chain breakage is prevented, and the influence of excessive abrasion between one side of the scraper and the ledge caused by centrifugal force is reduced. Because the articulated shaft is arranged on the ledge side of the shovel plate, the effect is only achieved when the scraper conveyor bends towards the ledge side of the baffle plate.
The hydraulic cylinder of the baffle ledge is provided with an inserting plate 14, the side of the baffle ledge of the lower base body is provided with a slot 15, the inserting plate can be inserted into the slot, and the inserting plate is inserted into the slot to realize the locking between the upper base body and the lower base body. When the hydraulic cylinder stretches, the control inserting plate is inserted into or separated from the inserting groove. The stroke positions of the hydraulic cylinders corresponding to the action positions of the flashboard and the movable brake shoe should not conflict.
The control method of the scraper conveyor for coal mining comprises the steps that when the scraper conveyor is pushed, the inserting plate of the middle groove in the rear half section of the turning section of the scraper conveyor is separated from the inserting groove, at the moment, the upper base body and the lower base body are unlocked, the upper base body can rotate relative to the lower base body, and chain breakage of the bending section is avoided.

Claims (9)

1. A scraper conveyor for coal mining is characterized in that: the two ends of the scraper conveyor are respectively provided with a hoisting mechanism, the baffle ledge and the shovel board ledge of the 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, the 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 pull rope.
2. The scraper conveyor for coal mining according to claim 1, characterized in that: 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, the movable brake shoe is provided with a driving mechanism, and the driving mechanism is used for controlling the brake shoe to be opened and closed.
3. The scraper conveyor for coal mining according to claim 2, characterized in that: the driving mechanism comprises a hydraulic cylinder and a swing arm; the outer side wall of the through hole is provided with a longitudinal elongated slot, the swing arm is hinged in the elongated slot through a vertical shaft, and the movable brake shoe is fixed on the inner side part of the swing arm; swing arm outside portion is equipped with the 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 the wedge roof.
4. The scraper conveyor for coal mining according to claim 2, characterized in that: the driving mechanism comprises a hydraulic cylinder and a swing arm; the outer side wall of the through hole is provided with a longitudinal elongated slot, the swing arm is hinged in the elongated slot through a vertical shaft, and the movable brake shoe is fixed on the inner side part of the swing arm; a longitudinal hydraulic cylinder is arranged on the baffle ledge, the hydraulic cylinder is provided with a top head, a wedge-shaped top plate is arranged at the outer side part of the swing arm of the baffle ledge, the hydraulic cylinder is arranged along the longitudinal direction, the end part of the hydraulic cylinder is provided with the top head, and the top head is used for pushing the wedge-shaped top plate; the baffle ledge and the movable brake shoe of the shovel board ledge are connected through a connecting rod.
5. The scraper conveyor for coal mining according to any one of claims 2 to 4, characterized in that: the pull cable is a steel wire rope, a shuttle-shaped body 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 spacing between the movable brake shoe and the fixed brake shoe is smaller than the maximum diameter of the shuttle body, and the maximum spacing between the movable brake shoe and the fixed brake shoe is larger than the maximum diameter of the shuttle body.
6. The scraper conveyor for coal mining according to claim 5, characterized in that: the baffle ledge, the shovel board ledge and the middle board of the middle trough 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 with the inner side part of the shovel plate of the lower base body; the hydraulic support is connected with the lower base body.
7. The scraper conveyor for coal mining according to claim 6, characterized in that: the hydraulic cylinder of the baffle ledge is provided with an inserting plate, the side of the baffle ledge of the lower base body is provided with a slot, and the inserting plate can be inserted into the slot.
8. A control method of a scraper conveyor for coal mining is characterized in that the scraper conveyor for coal mining according to claim 5 is used, 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 baffle plate of the middle trough of the rear half section is closed, and a winch at the front end of the scraper conveyor rolls a pull rope.
9. A control method of a coal mining scraper conveyor, which is characterized in that the coal mining scraper conveyor according to claim 7 is used, and when the scraper conveyor is pushed, an inserting plate of a middle groove in the rear half section of a turning section of the scraper conveyor is pulled out of an inserting groove.
CN202210221711.6A 2022-03-09 2022-03-09 Scraper conveyor for coal mining and control method Active CN114506626B (en)

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