Front crushing device of fully mechanized coal mining face crossheading reversed loader

Abstract

The utility model discloses a front crushing device of a fully mechanized coal mining face crossheading reversed loader, which belongs to the technical field of coal mining, solves the problem that large coal mined from a fully mechanized coal mining face blocks transportation equipment and an emergency exit, and comprises a fixed frame, a power jack and a detachable crushing head, the rectangular frame is provided with a plurality of first connecting trunnions and second connecting trunnions, a third connecting trunnion is arranged on the upper portion of the closed end of the V-shaped jaw plate frame, one end of the power jack is connected with the first connecting trunnions in a hinged mode, and the pushing end of the power jack is connected with the third connecting trunnion in a hinged mode. The second connecting trunnion is arranged between the two connecting holes in a hinged connection mode, and the lower portion of the jaw plate frame is connected with the detachable crushing head. The utility model effectively solves the influence of large block blockage during transportation treatment, has strong capacity of crushing large coal, reduces the time of the influence of large coal on transportation, and creates safe production conditions.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mining, and particularly relates to a pre - crushing device for a crossheading conveyor of a fully - mechanized coal mining face. Background Art

[0002] In the mining of fully - mechanized top - coal caving (mining) faces with thick coal seams and large mining heights, due to the large thickness of the coal seams and well - developed coal seam joints, large pieces of coal are prone to collapse during the normal production process of coal shearers. When large pieces of coal are transported to the lower outlet, due to their large volume, they often get blocked at the lower outlet and the feeding port of the conveyor, affecting the normal operation of the transportation system of the fully - mechanized coal mining face. In severe cases, it will lead to shutdown. In the past, large pieces of coal could only be broken by workers in the face entering the conveyor with pneumatic picks and sledgehammers in hand, which had a long impact on production time and increased the operation risk. Therefore, it is necessary to innovatively design a pre - crushing device for large pieces at the feeding port of the conveyor to crush large pieces of coal and gangue entering the feeding port of the conveyor, so as to solve the problems of large pieces of coal mined in the fully - mechanized coal mining face blocking the transportation equipment and safety exits. It changes from the original manual operation to hydraulic mechanized long - distance operation, improves the efficiency of crushing large pieces in the fully - mechanized coal mining face, reduces the manual labor intensity, keeps personnel away from dangerous areas, and improves operation safety. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a pre - crushing device for a crossheading conveyor of a fully - mechanized coal mining face to solve the problems of large pieces of coal mined in the fully - mechanized coal mining face blocking the transportation equipment and safety exits.

[0004] The technical solution of the utility model is: a pre - crushing device for a crossheading conveyor of a fully - mechanized coal mining face. The crossheading conveyor includes a conveyor chute cover plate, and it includes a fixed frame, a power jack, and a detachable crushing head. The fixed frame is arranged at the feeding port of the conveyor and is located above the conveyor chute cover plate. The fixed frame includes a rectangular frame. Multiple first connecting trunnions are arranged on the upper side of the rectangular frame facing the feeding port, and multiple second connecting trunnions are arranged on the lower side. The positions of the first connecting trunnions and the second connecting trunnions are opposite. It also includes a V - shaped jaw plate frame. The upper part of the closed end of the V - shaped jaw plate frame is provided with a third connecting trunnion. Connecting holes are respectively arranged at both ends of the opening of the V - shaped jaw plate frame. One end of the power jack is connected to the first connecting trunnion by hinge connection, the pushing end of the power jack is connected to the third connecting trunnion by hinge connection, the second connecting trunnion is arranged between the two connecting holes by hinge connection, and the lower part of the jaw plate frame is connected to the detachable crushing head.

[0005] As a further improvement of the utility model, the vertical movable angle α of the jaw plate frame is 40° - 50°.

[0006] As a further improvement of the utility model, the power jack is connected with a control end, and the control end is an operation valve group or an electromagnetic valve.

[0007] As a further improvement of the present utility model, triangular brackets are symmetrically connected to both sides of the rectangular frame respectively.

[0008] As a further improvement of the present utility model, a plurality of crushing pick tips are provided at the bottom of the detachable crushing head.

[0009] The beneficial effects of the present utility model are as follows: The fixed frame is installed at the feeding port section of the transfer machine in the transportation gateway of the fully mechanized coal mining face. The hydraulic jack is installed to cooperate with the detachable crushing head to complete mechanical activities, which is similar to the structure of an opening and closing jaw crusher, and forcibly fractures and crushes the large pieces of coal entering the chute of the transfer machine, effectively solving the problem of blockage of large pieces in the transfer machine. Since the hydraulic system of the fully mechanized coal mining face has sufficient power, the working torque and stroke of the jack are large, and it is equipped with a high-strength and sharp crushing head, which has a strong ability to crush large pieces of coal, reduces the influence time of large pieces of coal on transportation, and creates safe production conditions.

[0010] The problems solved and the advantages generated by the present utility model are as follows:

[0011] 1. It changes from the original manual use of pneumatic picks to crush large pieces to hydraulic mechanized long-distance operation, solves the problem of manually crushing large pieces of coal in the fully mechanized coal mining face, improves the efficiency of crushing large pieces of coal in the fully mechanized coal mining face, alleviates and reduces the manual labor intensity, realizes mechanized operation away from dangerous areas, reduces the implementation and preparation time of safety measures for personnel to enter the roadway and coal wall before crushing large pieces of coal, has a fast speed and high efficiency in crushing large pieces of coal, reduces production impact, and improves operation safety;

[0012] 2. It makes full use of the power source of the hydraulic system in the fully mechanized coal mining face, does not require adding new equipment, saves production costs, and the overall design size of the device is miniaturized and lightweight, which is suitable for the narrow working space of the fully mechanized coal mining face, does not affect the cooperation of the three machines and normal production, and has strong applicability;

[0013] 3. It fully considers the production environment and space factors in the fully mechanized coal mining face, has a simple structure, is flexible and convenient, all components are of detachable design, can be quickly disassembled and replaced, the connection mechanism design and installation position are convenient for daily inspection and maintenance, and has good maintainability;

[0014] 4. The overall device installation and layout are simple, flexible and convenient, which is convenient for daily fastening inspection, has high maintainability, and does not affect production operation;

[0015] 5. The telescopic working arm formed by the cooperation of the power jack and the detachable crushing head has a large remaining arm span, a large coverage range of large pieces of coal produced in the working face, no dead angle area, and also has the characteristics of simple processing and convenient replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 This is the structural decomposition diagram of the utility model;

[0018] Figure 3 This is the working state diagram of the utility model;

[0019] Figure 4 This is the structural connection block diagram of the utility model.

[0020] In the figure: 1 - fixed frame; 11 - rectangular frame; 12 - triangular support; 2 - power jack; 3 - jaw plate frame; 31 - connection hole; 32 - third connecting trunnion; 4 - detachable crushing head; 5 - loading machine floor chute; 6 - loading machine chute cover plate; 7 - first connecting trunnion; 8 - second connecting trunnion; 9 - crushing pick tip; 10 - pin shaft; 13 - bolt; 14 - control end; 15 - coal. Specific embodiments

[0021] The following further details the utility model in conjunction with the accompanying drawings and specific embodiments.

[0022] As Figures 1 - 4 shown, a pre - crushing device for a loading machine in the gate roadway of a fully - mechanized coal mining face. The loading machine in the gate roadway includes a loading machine chute cover plate 6, and comprises a fixed frame 1, a power jack 2 and a detachable crushing head 4. The fixed frame 1 is arranged at the feeding port of the loading machine and is located above the loading machine chute cover plate 6. The fixed frame 1 includes a rectangular frame 11. On the upper part of the side surface of the rectangular frame 11 facing the feeding port, there are a plurality of first connecting trunnions 7, and on the lower part, there are a plurality of second connecting trunnions 8. The positions of the first connecting trunnions 7 and the second connecting trunnions 8 are opposite. It also includes a V - shaped jaw plate frame 3. On the upper part of the closed end of the V - shaped jaw plate frame 3, there is a third connecting trunnion 32. At both ends of the opening of the V - shaped jaw plate frame 3, there are respectively connection holes 31. One end of the power jack 2 is connected to the first connecting trunnion 7 through a hinge connection, the pushing end of the power jack 2 is connected to the third connecting trunnion 32 through a hinge connection, the second connecting trunnion 8 is arranged between the two connection holes 31 through a hinge connection, and the lower part of the jaw plate frame 3 is connected to the detachable crushing head 4.

[0023] The vertical movement included angle α of the jaw plate frame 3 is 40° - 50°; the power jack 2 is connected with a control end 14, and the control end 14 is an operation valve group or an electromagnetic valve; on both sides of the rectangular frame 11, triangular supports 12 are symmetrically connected respectively; at the bottom of the detachable crushing head 4, there are a plurality of crushing pick tips 9.

[0024] This device is mainly applied to the unloading point at the tail of the transfer machine in the transportation gateway of the fully mechanized coal mining face. A crushing device is placed in front of the feeding port of the transfer machine, mainly to solve the problems that large-sized coal 15 produced in the working face clogs the feeding port of the transfer machine and that large chunks of coal 15 are pulled into the transfer machine, causing deformation of the chute cover plate 6 of the transfer machine. It reduces the need to stop the machine to crush large chunks of coal 15, improves production continuity, and reduces the safety hazards caused by the blockage and rolling of large chunks of coal 15 and the loosening and deformation of the chute cover plate 6 of the transfer machine.

[0025] The fixed frame 1 is fixedly connected to the feeding port of the transfer machine's floor chute 5 through high-strength bolts 13, specifically installed on the chute cover plate 6 of the transfer machine above it, thus forming a fixation. The triangular supports 12 respectively arranged on both sides of the rectangular frame 11 can effectively improve stability and ensure the stable operation of the work; the action mechanism consists of a power jack 2 and a jaw plate frame 3, and the working part consists of a jaw plate frame 3 and a detachable crushing head 4. The power jack 2 is arranged with bilateral jacks, with a larger crushing coverage range. After crushing, it can smoothly pass through the floor section of the transfer machine, reducing the jamming of large chunks of coal 15. During operation, the power jack 2 expands and contracts to drive the jaw plate frame 3 to drive the detachable crushing head 4, so that the crushing pick tip 9 reaches the crushing position of the target large chunk of coal 15. As Figure 3 shown by the arrow, the direction of the large chunk of coal 15 entering the transfer machine's floor chute 5 is indicated, and then extrusion crushing is carried out, enabling personnel to mechanize operations away from dangerous areas, reducing the implementation and preparation time of safety measures for personnel to enter the transfer machine's floor chute 5 before crushing large chunks of coal 15. The speed of crushing large chunks of coal 15 is fast and the efficiency is high.

[0026] The power jack 2 is hinged to the rectangular frame 11 through the first connecting ear shaft 7 and the pin shaft 10. The jaw plate frame 3 is connected to the rectangular frame 11 through the second connecting ear shaft 8 and the pin shaft 10. The pushing end of the power jack 2 is hinged to the third connecting ear shaft 32 through the pin shaft 10. The setting of multiple hinge connections can increase the swing stroke of the action mechanism device. The vertical swing angle α of the jaw plate frame 3 can reach 40° - 50°, and the covered diameter range of large chunks of coal 15 can reach 0.6 - 1.3 m. The power jack 2 has a large expansion and contraction margin, with a large coverage range for large chunks of coal 15 entering the transfer machine's floor chute 5 and no dead corner areas; the detachable crushing head 4 is connected to the jaw plate frame 3 through high-strength bolts 13, and it is convenient to replace in case of deformation and damage.

[0027] The overall design of this device features miniaturization and lightweight, making it suitable for the narrow working space of the fully mechanized coal mining face without affecting the matching relationship of the end supports. It has strong applicability. Each component is made by welding, with the characteristics of simple processing and convenient replacement. The welding points are reserved with openings to increase the welding strength and firmness. The fixed frame 1 and the connecting trunnions are made of thick-walled profiles, with reliable structural strength. The main connecting parts are connected and fixed using high-strength bolts 13, and there should be anti-loosening design. The design and installation position of the connecting mechanism are convenient for daily inspection and maintenance. The main working structure can be removed and replaced as a whole. The connecting parts can be visually inspected and tightened, with relatively high maintainability. The fixing method of the detachable breaker head 4 and the breaker pick tip 9 is simple, and pick teeth can be used. There is a solidified alloy head at its end, with high anti-shearing and impact resistance. The breaker pick tip 9 uses wear-resistant pick teeth, which can improve the breaking efficiency of large pieces of coal 15 and gangue, and reduce production impact. The control end 14 of this device is driven by the high-pressure liquid of the emulsion pump station in the fully mechanized coal mining face. An operation valve group or solenoid valve can be used. The hydraulic control pipeline and the operation valve can be extended to the front conveyor driver, enabling remote control, improving the level of automated operation and operation safety.

Claims

1. A pre-crushing device for a chute transfer machine of a fully mechanized mining working face, wherein the chute transfer machine comprises a chute cover plate of the transfer machine, and is characterized in that: The invention comprises a fixed frame (1), a power jack (2) and a detachable crushing head (4), wherein the fixed frame (1) is arranged at the feed inlet of the transfer machine and is located on the upper part of the chute cover plate (6) of the transfer machine, and the fixed frame (1) comprises a rectangular frame (11), wherein the upper part of the side of the rectangular frame (11) facing the feed inlet is provided with a plurality of first connecting ear shafts (7), and the lower part is provided with a plurality of second connecting ear shafts (8), wherein the first connecting ear shafts (7) and the second connecting ear shafts (8) are located opposite to each other; and further comprises a V-shaped jaw plate frame (3), a third connecting ear shaft (32) is provided at the upper part of the closed end of the V-shaped jaw frame (3), and connecting holes (31) are respectively provided at both ends of the opening of the V-shaped jaw frame (3), one end of the power jack (2) is connected to the first connecting ear shaft (7) by hinge connection, the pushing end of the power jack (2) is connected to the third connecting ear shaft (32) by hinge connection, the second connecting ear shaft (8) is arranged between the two connecting holes (31) by hinge connection, and the lower part of the jaw frame (3) is connected to the detachable crushing head (4).

2. The pre-crushing device of the chute transfer machine of the fully mechanized mining working face according to claim 1 is characterized by: The vertical movable angle α of the jaw plate frame (3) is 40°-50°.

3. A pre-crushing device for a fully mechanized mining face chute transfer machine according to claim 1 or 2, characterized in that: The power jack (2) is connected to a control end (14), and the control end (14) is an operating valve group or a solenoid valve.

4. The pre-crushing device of the chute transfer machine of the fully mechanized mining face according to claim 3 is characterized by: Triangular brackets (12) are symmetrically connected to both sides of the rectangular frame (11).

5. The pre-crushing device of the chute transfer machine of the fully mechanized mining face according to claim 4 is characterized by: The bottom of the detachable crushing head (4) is provided with a plurality of crushing pick tips (9).

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