A low-position top coal caving filling hydraulic support

Abstract

The invention discloses a low-position top coal caving and filling hydraulic support, the overall structure of which mainly includes a top beam, a shield beam, a tail beam, a column, front and rear connecting rods, a base, a compacting mechanism, a lifting and lowering dual-purpose scraper conveyor and a lifting mechanism, the lifting mechanism including a power system and a transmission device; the lifting and lowering dual-purpose scraper conveyor is suspended on the tail beam by a steel cable, the steel cable is wound on the driven wheel in opposite directions, and the force from the power system controls the lifting and lowering of the lifting mechanism via the transmission device; the lifting mechanism is connected to the lifting and lowering dual-purpose scraper conveyor through the steel cable, controls the lifting and lowering of the lifting and lowering dual-purpose scraper conveyor, coordinates the coal caving process and the filling process, and realizes the coal transportation and gangue filling work of the top coal caving working face. A hydraulic support is used to realize the timely connection of coal caving and filling operations, and the lifting and lowering dual-purpose scraper conveyor can effectively treat solid waste after coal transportation. It has a simple structure, convenient operation and good use effect.

Description

Technical Field

[0001] The invention relates to a filling hydraulic support, in particular to a low-position top coal caving filling hydraulic support suitable for a top coal caving mining working face that needs to be filled. Background Art

[0002] In recent years, solid filling coal mining technology has been widely used, but it is mostly used in fully mechanized mining faces, and top coal caving faces have not yet applied filling technology. Filling hydraulic support is the key equipment for the application of comprehensive mechanized filling coal mining technology in fully mechanized mining faces. It can effectively fill the goaf, handle solid waste such as gangue, and control surface subsidence.

[0003] At present, the top coal caving supports are mainly divided into high-position top coal caving supports, medium-position top coal caving supports and low-position top coal caving supports. Because the coal caving windows of the high-position and medium-position supports are higher, the top coal that falls behind the supports is difficult to recover. Therefore, the on-site top coal caving process mostly requires the use of low-position coal caving. In the lower coal seams with small mining heights and thick coal seams, low-position top coal caving hydraulic supports are needed to ensure the coal caving rate. For working faces with dual needs of coal caving and filling, there are currently no low-position top coal caving and filling hydraulic supports. Summary of the invention

[0004] Technical problem: The purpose of the present invention is to overcome the deficiencies in the prior art and provide a low-position top coal caving filling hydraulic support to meet the production requirements of the coal mine top coal caving comprehensive mechanized solid filling mining working face.

[0005] Technical solution: A low-position top coal caving and filling hydraulic support of the present invention comprises a top beam, a shield beam, a column, a base, a compacting mechanism, a tail beam, a pump fluid pipeline and a control system; a lifting dual-purpose scraper conveyor is arranged under the tail beam, the tail beam is in the shape of an inverted groove, a rectangular coal caving opening is opened in the middle of the top surface of the tail beam, T-shaped guide grooves are arranged on both sides of the end of the top surface of the tail beam, and a lifting mechanism controlled by a pump fluid pipeline and a control system is symmetrically arranged on the inner side of the groove of the tail beam, the lifting mechanism comprises a power system and a transmission device, the lifting mechanism is connected to the lifting dual-purpose scraper conveyor via a steel cable, controls the lifting and lowering of the lifting dual-purpose scraper conveyor, coordinates the coal caving process and the filling process, and realizes the coal transportation and gangue filling work of the top coal caving working face.

[0006] The power system includes a hydraulic cylinder connected to a pump fluid pipeline, the piston rod end of the hydraulic cylinder is fixed to the front end of the tail beam, a T-shaped guide slider is welded on the cylinder of the hydraulic cylinder, the T-shaped guide slider is installed in the T-shaped guide groove of the tail beam, and the hydraulic cylinder moves forward and backward along the T-shaped guide groove.

[0007] The transmission device includes a rack, a gear, a driving wheel, a driven wheel, a steel cable and a bearing seat. The rack is arranged on the cylinder barrel of the hydraulic cylinder opposite to the T-shaped guide slider. The gear and the driving wheel are fixed to the middle part of the inner side of the tail beam groove in sequence through the middle bearing seat. The gear is meshed with the rack, and moves forward or backward with the extension and contraction of the hydraulic cylinder and drives the driving wheel to rotate. There are two driven wheels, which are symmetrically arranged on the side bearing seats on the front and rear sides of the driving wheel. The two side bearing seats are respectively fixed at the two ends of the inner side of the tail beam groove. The driving wheel and the front and rear driven wheels are connected to the lifting and lowering dual-purpose scraper conveyor through the two ends. The steel cable is wound in reverse and fixed to achieve synchronous lifting; during transmission, the extension and contraction of the hydraulic cylinder drives the translation of the rack, and then drives the gear and the driving wheel to rotate synchronously, and the two driven wheels rotate synchronously with the driving wheel through the steel cable.

[0008] The lifting and dual-purpose scraper conveyor is provided with an open and close unloading port corresponding to the rectangular coal discharge port in the middle of the tail beam top surface. When discharging coal, the lifting and dual-purpose scraper conveyor descends to the ground, and the open and close unloading port is in a closed state to receive the dropped coal and transport the coal. When filling, the lifting and dual-purpose scraper conveyor rises to the set position, and the open and close unloading port is opened to transfer and drop the filling material into the goaf to facilitate the operation of the compaction mechanism.

[0009] Beneficial effects: Due to the adoption of the above technical solution, the present invention coordinates the coal discharge process and the filling process by controlling the rise and fall of the dual-purpose lifting scraper conveyor, and realizes the coal transportation and gangue filling work of the top coal caving working face. A hydraulic support is used to realize the timely continuation of coal discharge and filling operations, and a scraper conveyor is used to realize the two purposes of transportation and filling material transportation of the top coal caving working face. The coordinated compaction mechanism realizes timely filling after top coal caving, effectively handles gangue waste, and meets the requirements of green mining. It has a simple structure, is easy to operate, saves time and effort, has good use effect, and has wide practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of a hydraulic support for low-position top coal caving and filling coal mining according to the present invention.

[0011] Figure 2 It is a structural diagram of the tail beam and the scraper conveyor of the present invention.

[0012] Figure 3 It is a structural diagram of the lifting mechanism of the present invention.

[0013] Figure 4 It is a diagram of the internal structure of the tail beam of the present invention.

[0014] In the figure: top beam 1, shield beam 2, column 3, front and rear connecting rods 4, base 5, compacting mechanism 6, tail beam 7, dual-purpose scraper conveyor 8, hydraulic cylinder 9, rack 10, gear 11, driving wheel 12, driven wheel 13, steel cable 14, discharge port 15, T-shaped guide groove 16, bearing seats on both sides 17, middle bearing seat 18, coal discharge port 19, T-shaped guide slider 20. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the embodiments in the accompanying drawings:

[0016] A low-position top coal caving and filling hydraulic support of the present invention comprises a top beam 1, a shield beam 2, a column 3, a base 5, a compacting mechanism 6, a tail beam 7, a pumping liquid pipeline and a control system; a lifting dual-purpose scraper conveyor 8 is arranged below the tail beam 7, the tail beam 7 is in the shape of an inverted groove, a rectangular coal discharge port is opened in the middle of the top surface of the tail beam 7, and T-shaped guide grooves 16 are arranged on both sides of the ends of the top surface of the tail beam 7. A lifting mechanism controlled by a pumping liquid pipeline and a control system is symmetrically arranged on the inner side of the groove of the tail beam 7. The lifting mechanism comprises a power system and a transmission device. The lifting mechanism is connected to the lifting dual-purpose scraper conveyor 8 through a steel cable to control the lifting and lowering of the lifting dual-purpose scraper conveyor 8, coordinate the coal caving process and the filling process, and realize the coal transportation and gangue filling work of the top coal caving working face. A compacting mechanism 6 is hinged at the rear of the base 5 to realize the compaction of the filling material and avoid interference with the scraper conveyor.

[0017] The power system includes a hydraulic cylinder 9 connected to a pump fluid pipeline, the piston rod end of the hydraulic cylinder 9 is fixed to the front end of the tail beam 7, a T-shaped guide slider 20 is welded on the cylinder of the hydraulic cylinder 7, the T-shaped guide slider 20 is installed in the T-shaped guide groove 16 of the tail beam 7, and the hydraulic cylinder 7 moves forward and backward along the T-shaped guide groove 16.

[0018] The transmission device includes a rack 10, a gear 11, a driving wheel 12, a driven wheel 13, a steel cable 14 and a bearing seat. The rack 10 is arranged on the cylinder of the hydraulic cylinder 9 opposite to the T-shaped guide slider 20. The gear 11 and the driving wheel 12 are fixed to the middle part of the inner side of the groove of the tail beam 7 through the middle bearing seat 18 in turn. The gear 11 is meshed with the rack 10, and moves forward or backward with the extension and contraction of the hydraulic cylinder 9 and drives the driving wheel 12 to rotate. There are two driven wheels 13, which are symmetrically arranged on the side bearing seats 17 on the front and rear sides of the driving wheel 12. The two side bearing seats 17 are respectively fixed at the two ends of the inner side of the groove of the tail beam 7. The driving wheel 12 and the front and rear driven wheels 13 are connected to the lifting dual-purpose scraper conveyor 8 through the steel cable 14 at both ends. The two ends are connected to the lifting dual-purpose scraper conveyor 8 by reverse winding and fixing to achieve synchronous lifting; during transmission, the extension and contraction of the hydraulic cylinder 9 drives the translation of the rack 10, and then drives the gear 11 and the driving wheel 12 The two driven wheels 13 rotate synchronously with the driving wheel 12 through the steel cables 14 .

[0019] The lifting and dual-purpose scraper conveyor 8 is provided with an open and close unloading port 15 corresponding to the rectangular coal discharge port in the middle of the top surface of the tail beam 7. When discharging coal, the lifting and dual-purpose scraper conveyor 8 descends to the ground, and the open and close unloading port is in a closed state to receive the dropped coal and transport the coal. When filling, the lifting and dual-purpose scraper conveyor rises to the set position, and the open and close unloading port 15 is opened to transfer the filling material and drop it into the goaf to facilitate the operation of the compaction mechanism 6.

Claims

1. A low-position top coal filling hydraulic support, comprising a top beam, a shield beam, a column, a base, a compacting mechanism, a tail beam, a pump pipeline and a control system; characterized in that: A lifting and lowering dual-purpose scraper conveyor is provided below the tail beam. The tail beam is in the shape of an inverted groove. A rectangular coal discharge port is provided in the middle of the top surface of the tail beam. T-shaped guide grooves are provided on both sides of the ends of the top surface of the tail beam. A lifting mechanism controlled by a pump liquid pipeline and a control system is symmetrically provided on the inner side of the groove of the tail beam. The lifting mechanism includes a power system and a transmission device. The lifting mechanism is connected to the lifting and lowering dual-purpose scraper conveyor through a steel cable to control the lifting and lowering of the lifting and lowering dual-purpose scraper conveyor, coordinate the coal discharge process and the filling process, and realize the coal transportation and gangue filling work of the top coal discharge working face; The power system includes a hydraulic cylinder connected to the pump fluid pipeline, the end of the piston rod of the hydraulic cylinder is fixed to the front end of the tail beam, a T-shaped guide slider is welded on the cylinder of the hydraulic cylinder, and the T-shaped guide slider is installed in the T-shaped guide groove of the tail beam, which can drive the hydraulic cylinder to move forward and backward along the T-shaped guide groove; The transmission device comprises a rack, a gear, a driving wheel, a driven wheel, a steel cable and a bearing seat. The rack is arranged on the cylinder barrel of the hydraulic cylinder opposite to the T-shaped guide slider. The gear and the driving wheel are fixed to the middle part of the inner side of the tail beam groove in sequence through the middle bearing seat. The gear is meshed with the rack, and moves forward or backward with the extension and contraction of the hydraulic cylinder and drives the driving wheel to rotate. There are two driven wheels, which are symmetrically arranged on the side bearing seats on the front and rear sides of the driving wheel. The bearing seats on both sides are respectively fixed at the two ends of the inner side of the tail beam groove. The driving wheel and the front and rear driven wheels are connected to the steel cable on the lifting dual-purpose scraper conveyor through the two ends and are wound in reverse to achieve synchronous lifting. During transmission, the extension and contraction of the hydraulic cylinder drives the translation of the rack, thereby driving the gear and the driving wheel to rotate synchronously, and the two driven wheels rotate synchronously with the driving wheel through the steel cable respectively. The lifting and dual-purpose scraper conveyor is provided with an open and close unloading port corresponding to the rectangular coal discharge port in the middle of the tail beam top surface. When discharging coal, the lifting and dual-purpose scraper conveyor descends to the ground, and the open and close unloading port is in a closed state to receive the dropped coal and transport the coal. When filling, the lifting and dual-purpose scraper conveyor rises to the set position, and the open and close unloading port is opened to transfer and drop the filling material into the goaf to facilitate the operation of the compaction mechanism.

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