A roof supporting truss device for a high fully-mechanized caving mining roadway in an extra-thick coal seam

Abstract

The application discloses a kind of thick coal seam high fully mechanized caving coal mine roadway roof supporting truss device, belong to coal mine roadway supporting technical field;Truss device includes the first bracing plate and second bracing plate fixed in roadway roof bottom;First bracing plate is provided with steel wire mesh between second bracing plate;First bracing plate bottom sliding installation has mobile seat;The bottom of mobile seat is provided with driving plate, and driving plate both sides are symmetrically rotatably connected with first connecting plate, and first connecting plate is rotatably connected with second connecting plate, and second connecting plate rotatably installs L type roof, and driving member drives first connecting plate and second connecting plate movement, so that driving plate, first connecting plate and second connecting plate form M type from U type;The application solves the problem that existing fixed steel wire mesh is not convenient for coal block and slag to fall off, avoids the influence of coal block and slag accumulation on steel wire mesh load bearing.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coal mine roadway support, and particularly relates to a high fully-mechanized caving mining coal mine roadway roof support truss device for super-thick coal seams. BACKGROUND

[0002] In the process of high fully-mechanized caving mining of super-thick coal seams, the support of the coal mine roadway roof is a key link to ensure the safety and efficiency of mining operations. High fully-mechanized caving mining of super-thick coal seams is a mining technology used for coal mines with large coal seam thickness and complex geological conditions. This technology gradually releases the top coal in the upper part of the coal seam through comprehensive mechanized top coal caving to achieve efficient mining of coal. In this process, the coal mine roadway roof is subjected to great pressure and complex stress changes, and is prone to roof collapse, roof fall and other safety accidents, so a reliable support device is needed to ensure the stability of the roadway roof.

[0003] At present, the existing high fully-mechanized caving mining coal mine roadway roof support truss device for super-thick coal seams usually uses a method of directly fixing steel wire mesh on the roof for support. This fixing design can support the roof to some extent and prevent the roof rock from falling. However, in the actual mining process, due to the frequent movement of large mechanical equipment inside the roadway and the disturbance of the roof by mining operations, some rocks will fall off the top of the coal mine. The falling coal and slag will accumulate on the steel wire mesh, and the existing fixed steel wire mesh design is not convenient for the discharge of these falling coal and slag. With the continuous accumulation of coal and slag, not only will it increase the load bearing burden of the steel wire mesh and affect its support effect, but it may also cause other safety hazards, such as hindering the passage of personnel and equipment, affecting the ventilation effect, and thus adversely affecting the safety and efficiency of coal mining operations. SUMMARY

[0004] The present application overcomes the shortcomings of the prior art and provides a high fully-mechanized caving mining coal mine roadway roof support truss device for super-thick coal seams. The present application is achieved through the following technical solutions:

[0005] A high fully-mechanized caving mining coal mine roadway roof support truss device for super-thick coal seams, comprising a first support plate fixed in the middle of the bottom of the roadway roof and a second support plate fixed on both sides of the bottom of the roadway roof; both sides of the first support plate and the second support plate are connected with support legs; a steel wire mesh is arranged between the first support plate and the second support plates on both sides; a moving seat is slidably installed between the top ends of the two support legs at the bottom of the first support plate; one end of the steel wire mesh is connected to the moving seat through a tension spring, and the other end of the steel wire mesh is hingedly connected to the second support plate;

[0006] The bottom of the moving seat is provided with a driving plate, the top end of the driving plate is symmetrically fixedly connected with a pull rod, and the pull rod is slidably connected with the moving seat; the two sides of the driving plate are symmetrically rotatably connected with first connecting plates, the ends away from the driving plate of the two first connecting plates are rotatably connected with second connecting plates respectively, the ends away from each other of the two second connecting plates are rotatably installed with L-shaped top plates, a driving piece for driving the driving plate to move is arranged between the two legs of the first supporting plate, torsion springs are installed at the connection between the driving plate and the first connecting plate and the connection between the first connecting plate and the second connecting plate, and the directions of the forces of the torsion springs are opposite; the driving piece drives the first connecting plate and the second connecting plate to move, so that the driving plate, the first connecting plate and the second connecting plate are changed from the U-shaped structure to the M-shaped structure.

[0007] Further, the driving piece comprises a driving threaded rod and a bidirectional threaded rod, the inside of each of the two legs connected with the first supporting plate is rotatably installed with the driving threaded rod, the inside of each of the two legs connected with the first supporting plate is installed with a motor, the output end of the motor is fixedly connected with the corresponding driving threaded rod, the two ends of the driving plate are threadedly connected with the corresponding driving threaded rods respectively, one side of each of the two second connecting plates is rotatably installed with a threaded sliding block, one end of the driving plate is rotatably installed with the bidirectional threaded rod, and the two ends of the bidirectional threaded rod are threadedly connected with the corresponding threaded sliding blocks respectively.

[0008] Further, one side of the threaded sliding block is fixedly connected with a large sprocket, the connection between the L-shaped top plate and the second connecting plate is fixedly connected with a small sprocket, the large sprocket and the small sprocket are drivingly connected through a chain, the middle part of the bidirectional threaded rod is fixedly connected with a gear, one side of each of the two legs connected with the first supporting plate is fixedly connected with a rack, and the gear is intermittently meshingly connected with the corresponding rack.

[0009] Further, the gear ratio of the large sprocket and the small sprocket is 3:1.

[0010] Further, the two ends of the moving seat are respectively installed with a pressing piece, the two sides of the moving seat are symmetrically slidably installed with pressing seats, the bottom end of each of the pressing seats is slidably installed with a rubbing plate along the length direction, and the bottom end of the rubbing plate is in contact connection with the top end of the steel wire mesh; the pressing piece acts on the pressing seat, so that the pressing seat drives the rubbing plate to press on the steel wire mesh, and the coal blocks and slag embedded on the steel wire mesh are conveniently cleaned.

[0011] Further, the bottom end of the rubbing plate is fixedly connected with spherical blocks at equal intervals, and the spherical blocks are embedded in the holes of the steel wire mesh.

[0012] Further, the lower pressing piece comprises a conical friction wheel, an upward friction strip and a downward friction groove; the conical friction wheel is symmetrically and slidably installed at the inner side of the two ends of the moving seat, the upward friction strip is symmetrically and fixedly connected to the top of the two ends of the first supporting plate, the downward friction groove is formed at the side of the corresponding supporting leg, the conical friction wheel is frictionally connected to the downward friction groove at one side, long and short sliding grooves are respectively formed at the two sides of the supporting leg connected with the first supporting plate, the end of the short sliding groove is in communication with the bottom of the long sliding groove, the other end of the short sliding groove is in communication with the middle of the long sliding groove, and the communication parts of the short sliding groove and the long sliding groove are fixedly connected with triangular guide blocks; the conical friction wheel is rotatably connected with a switching block at one side, the switching block is slidably connected with the inner wall of the long sliding groove, the switching block is fixedly connected with a return spring inside, the switching block is slidably connected with an elastic block at one end, the elastic block is fixedly connected with the return spring, and the conical friction wheel is fixedly connected with a pushing rod, and the pushing rod is slidably connected with the lower pressing seat.

[0013] Further, the inclined surface of the triangular guide block at the end of the short sliding groove and the bottom of the long sliding groove faces the long sliding groove, and the inclined surface of the triangular guide block at the other end of the short sliding groove and the middle of the long sliding groove faces the short sliding groove.

[0014] Further, the bottom end of the lower pressing seat is fixedly connected with a connecting block, the paddle is provided with a groove, the connecting block is located in the groove, a first spring is connected between the side wall of the groove and the connecting block, so that the connecting block is slidably connected with the paddle; one end of the two paddles is fixedly connected with a connecting rod, the side of the corresponding supporting leg is fixedly connected with a protruding block, the outer wall of the connecting rod is in contact with the outer wall of the protruding block, and the heights of the protrusions on the protruding block are different.

[0015] Further, a planar threaded groove is formed in the moving seat, a plurality of tension springs are fixedly installed in the planar threaded groove, and a plurality of groups of flexible steel wire ropes are fixedly connected to one end of the steel wire mesh.

[0016] The beneficial effects of the present application relative to the prior art are as follows:

[0017] 1. The present application is convenient for cleaning the fallen coal and slag: when it is necessary to clean the fallen coal and slag on the steel wire mesh, the motor is started to drive the driving threaded rod to rotate, so that the falling plate is lowered, and the first connecting plate and the second connecting plate are moved, the originally U-shaped structure is changed into a M-shaped structure, the L-shaped top plate is retracted, one end of the steel wire mesh is inclined, the length is changed, and the flexible steel wire rope is stretched to stretch the tension spring to adapt to the operation. In this process, the coal and slag on the steel wire mesh can slide down along the inclined steel wire mesh, effectively solving the problem that the existing fixed steel wire mesh is not convenient for discharging the fallen coal and slag, avoiding the influence of the accumulation of coal and slag on the load bearing of the steel wire mesh, ensuring the supporting effect, and eliminating the safety hazards that may be caused by the accumulation of coal and slag, such as hindering the passage of personnel and equipment, affecting the ventilation effect, etc., ensuring the safety and efficiency of coal mining operation.

[0018] 2, prevent coal block slag into the device inside: in the process of moving seat down, the conical friction wheel and the friction slot friction contact starts to rotate, drive the lever to make the lower seat along the mobile seat both sides down. The lower seat of the lower part of the steel mesh with the mobile seat connection gap, prevent coal block slag into the device inside, avoid the device failure or run not smooth caused by coal block slag into, prolong the service life of the device, reduce the maintenance cost; the other hand for the subsequent plate provides support, ensure the stability of the overall structure and the integrity of the function.

[0019] 3, provide irregular wobble force to promote coal block slag discharge: in the leg side design has the convex block of the convex height is not same, when the mobile seat down, the connecting stick on the plate along the convex block surface running, since the plate and the connecting block between the design has the first spring, and the lower seat can only move up and down, the plate can only move along the length direction of the lower seat, the connecting stick with the plate along the convex block convex direction movement, and through the first spring reset, so that the plate on the spherical block constantly friction steel mesh form wobble. This irregular wobble force can further promote the coal block slag on the steel wire mesh discharge, improve the cleaning effect, ensure that the steel wire mesh always keep good working condition, provide reliable support for coal mine roadway roof. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 for the overall structure of the present invention schematic diagram;

[0021] Figure 2 for the first support plate and the position structure of the mobile seat schematic diagram;

[0022] Figure 3 for the mobile seat local section structure schematic diagram;

[0023] Figure 4 for the drive member structure schematic diagram;

[0024] Figure 5 for the structure of the mobile seat schematic diagram;

[0025] Figure 6 for the rack position structure schematic diagram;

[0026] Figure 7 for the position structure of the upper friction strip schematic diagram;

[0027] Figure 8 for the long chute position structure schematic diagram;

[0028] Figure 9 for the drive plate, the first connecting plate and the second connecting plate of the explosion diagram;

[0029] Figure 10Structure schematic view of partial section of pressing seat and rubbing plate of the present application;

[0030] Figure 11 Structure schematic view of partial section of long slide groove and short slide groove of the present application;

[0031] Figure 12 Structure schematic view of convex block of the present application;

[0032] Figure 13 Structure schematic view of switching block of the present application;

[0033] Figure 14 Structure schematic view of Figure 13 Enlarged view at A;

[0034] Figure 15 Structure schematic view of Figure 3 Enlarged view at B;

[0035] Figure 16 Structure schematic view of Figure 8 Enlarged view at C.

[0036] In the figure: 1, leg; 2, first support plate; 3, steel wire mesh; 4, moving seat; 5, planar threaded groove; 6, tension spring; 7, flexible steel wire rope; 8, driving plate; 9, first connecting plate; 10, second connecting plate; 11, L-shaped top plate; 12, pressing seat; 13, rubbing plate; 14, pull rod; 15, second support plate; 21, driving threaded rod; 22, threaded sliding block; 23, bidirectional threaded rod; 24, large chain wheel; 25, small chain wheel; 26, gear; 27, rack; 31, conical friction wheel; 32, ascending friction strip; 33, descending friction groove; 34, long slide groove; 35, short slide groove; 36, triangular guide block; 37, switching block; 38, return spring; 39, elastic block; 310, shifting rod; 51, connecting block; 52, first spring; 53, connecting stick; 54, convex block. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear, the present application is further described in detail in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application. The technical solutions of the present application are described in detail below in combination with embodiments and drawings, but the protection scope is not limited by this.

[0038] Referring to Figures 1 to 16The embodiment provides a roof support truss device for high fully-mechanized coal mining in an extra-thick coal seam, which comprises a first support plate 2 located at the middle of the bottom of a roadway roof and a second support plate 15 located at the two sides of the bottom of the roadway roof; the first support plate 2 and the second support plate 15 are both rectangular structures, and the bottom of the first support plate 2 and the bottom of the second support plate 15 are both connected with supporting legs 1; the first support plate 2 and the second support plate 15 are both fixedly installed on the roadway roof of the coal mine through anchor rods, a steel wire mesh 3 is installed between the first support plate 2 and the second support plates 15 on the two sides; a moving seat 4 is slidingly installed between the top ends of the two supporting legs 1 at the bottom of the first support plate 2; a planar threaded groove 5 is formed in the moving seat 4, a plurality of tension springs 6 are fixedly installed in the planar threaded groove 5, and one end of the steel wire mesh 3 is fixedly connected with a plurality of groups of flexible steel wire ropes 7; the plurality of groups of flexible steel wire ropes 7 are in one-to-one correspondence with and fixedly connected with the plurality of groups of tension springs 6; the other end of the steel wire mesh 3 is hingedly connected with the second support plate 15.

[0039] A driving plate 8 is arranged at the bottom of the moving seat 4, the top end of the driving plate 8 is symmetrically fixedly connected with a pull rod 14, the pull rod 14 is slidingly connected with the moving seat 4, first connecting plates 9 are symmetrically and rotationally connected to the two sides of the driving plate 8, the ends, away from the driving plate 8, of the two first connecting plates 9 are respectively rotationally connected with second connecting plates 10, L-shaped roof plates 11 are rotationally installed at the ends, away from each other, of the two second connecting plates 10, a driving member for driving the driving plate 8 to move is arranged between the two supporting legs 1 at the bottom of the first support plate 2, torsion springs are installed at the connection between the driving plate 8 and the first connecting plate 9 and the connection between the first connecting plate 9 and the second connecting plate 10, and the directions of the forces of the torsion springs are opposite; when the driving member drives the first connecting plate 9 and the second connecting plate 10 to move, the driving plate 8, the first connecting plate 9 and the second connecting plate 10 will form a M-shaped type from the original U-shaped type; the initial state of the roadway roof truss device of the coal mine is that the first support plate 2 and the second support plate 15 are both close to the inside of the coal mine roadway, and are fixed on the roadway roof through anchor rods, the supporting legs 1 provide support force for the first support plate 2 and the second support plate 15, one end of the steel wire mesh 3 is hingedly connected to the second support plate 15, and the other end is installed on the moving seat 4 of the first support plate 2, because there is a certain height difference between the first support plate 2 and the moving seat 4, the top of the L-shaped roof plate 11 abuts against the edge of the steel wire mesh 3 close to the moving seat 4, so that the steel wire mesh 3 is prevented from not being close to the roadway roof.

[0040] Please refer to Figure 2 , 4 , 6 and Figure 9As shown, the driving member includes a driving threaded rod 21 and a bidirectional threaded rod 23, the driving threaded rod 21 is rotatably installed in the two legs 1 connected with the first supporting plate 2, a motor is installed in the two legs 1 connected with the first supporting plate 2, the output end of the motor is fixedly connected with the corresponding driving threaded rod 21, the both ends of the driving plate 8 are respectively threadedly connected with the corresponding driving threaded rod 21, a threaded sliding block 22 is rotatably installed on one side of the two second connecting plates 10, the one end of the driving plate 8 is rotatably installed with the bidirectional threaded rod 23, the both ends of the bidirectional threaded rod 23 are respectively threadedly connected with the corresponding threaded sliding block 22, a large chain wheel 24 is fixedly connected on one side of the threaded sliding block 22, a small chain wheel 25 is fixedly connected at the connection between the L-shaped top plate 11 and the second connecting plate 10, the large chain wheel 24 and the small chain wheel 25 are drivingly connected through a chain, the middle part of the bidirectional threaded rod 23 is fixedly connected with a gear 26, the two legs 1 connected with the first supporting plate 2 are both fixedly connected with a rack 27 on one side, the gear 26 is intermittently meshingly connected with the corresponding rack 27, the gear ratio of the large chain wheel 24 and the small chain wheel 25 is 3:1; when it is needed to clean the coal mine falling debris on the steel wire mesh 3, first start the two motors, and then drive the two driving threaded rods 21, since the both ends of the driving plate 8 are threadedly connected with the driving threaded rod 21, the driving plate 8 descends, since the driving plate 8 is designed with a pull rod 14, and there is a movement redundancy between the pull rod 14 and the moving seat 4, initially the driving plate 8 descends, the driving plate 8 drives the first connecting plate 9 and the second connecting plate 10 to descend, so that the original L-shaped top plate 11 gradually does not contact the steel wire mesh 3, with the descending of the driving plate 8, the pull rod 14 drives the moving seat 4 to descend, at this time the steel wire mesh 3 gradually begins to tilt, when the gear 26 meshes with the rack 27 after the driving plate 8 descends to a certain position, the bidirectional threaded rod 23 rotates with the movement of the driving plate 8, at this time the two threaded sliding blocks 22 on the two second connecting plates 10 move close to each other, since there is a torsion spring between the driving plate 8 and the two first connecting plates 9, and there is a torsion spring between the first connecting plate 9 and the second connecting plate 10, and the directions of their elastic force are opposite, at this time the close of the threaded sliding blocks 22 makes the first connecting plate 9 rotate upward along the hinge of the driving plate 8, and the second connecting plate 10 rotates downward along the hinge of the first connecting plate 9, at this time the driving plate 8, the first connecting plate 9 and the second connecting plate 10 are formed into a M-shaped type from the original U-shaped type. This design is to avoid the coal block debris falling on the L-shaped top plate 11 and the driving plate 8 when the steel wire mesh 3 tilts, so as to affect the later operation. Since the mutual close of the threaded sliding blocks 22 makes the second connecting plate 10 fold, at this time the threaded sliding block 22 rotates 60 degrees relative to the second connecting plate 10, at this time the large chain wheel 24 also rotates, finally making the small chain wheel 25 rotate, the gear ratio of the large chain wheel 24 and the small chain wheel 25 is 3:1, so the large chain wheel 24 rotates 60 degrees, and the small chain wheel 25 rotates 180 degrees, the L-shaped top plate 11 is retracted.

[0041] The two ends of the moving seat 4 are respectively provided with a pressing part, and the two sides of the moving seat 4 are symmetrically provided with a pressing seat 12 which is slidably arranged along the length direction, and the bottom end of the pressing seat 12 is slidably provided with a rubbing plate 13, the bottom end of the rubbing plate 13 is in contact with the top end of the steel wire mesh 3, the bottom end of the rubbing plate 13 is fixedly provided with a spherical block at equal intervals, and the spherical block is embedded in the hole of the steel wire mesh 3. The pressing part acts on the pressing seat 12, so that the pressing seat 12 drives the rubbing plate 13 to press on the steel wire mesh 3, thereby facilitating the cleaning of the coal blocks and slag embedded in the steel wire mesh 3.

[0042] Please refer to Figure 7 、 8 , 11, 12, 13 and Figure 14 , the pressing part comprises a conical friction wheel 31, an upward friction strip 32 and a downward friction groove 33; the two ends of the moving seat 4 are symmetrically provided with the conical friction wheel 31 which is slidably arranged in the inner side, the two ends of the first supporting plate 2 are symmetrically fixedly provided with the upward friction strip 32, one side of the corresponding supporting leg 1 is provided with the downward friction groove 33, one side of the conical friction wheel 31 is in frictional connection with the downward friction groove 33, the two sides of the supporting leg 1 connected with the first supporting plate 2 are respectively provided with a long sliding groove 34 and a short sliding groove 35, one end of the short sliding groove 35 is in communication with the bottom of the long sliding groove 34, the other end of the short sliding groove 35 is in communication with the middle of the long sliding groove 34, and the communication parts of the short sliding groove 35 and the long sliding groove 34 are fixedly provided with a triangular guide block 36, one side of the conical friction wheel 31 is rotatably connected with a switching block 37, the switching block 37 is in sliding connection with the inner wall of the long sliding groove 34, the inside of the switching block 37 is fixedly provided with a reset spring 38, one end of the switching block 37 is slidably provided with an elastic block 39, the elastic block 39 is fixedly connected with the reset spring 38, the middle of the conical friction wheel 31 is fixedly provided with a push rod 310, and the push rod 310 is in sliding connection with the pressing seat 12; since one side of the supporting leg 1 is designed with the upward friction strip 32 and the downward friction groove 33, the downward movement of the moving seat 4 will make the conical friction wheel 31 in frictional contact with the downward friction groove 33, so that the conical friction wheel 31 starts to rotate, the rotation of the conical friction wheel 31 will drive one end of the push rod 310 to rotate along the center of the conical friction wheel 31, so that the pressing seat 12 moves downward along the two sides of the moving seat 4, and the downward movement of the pressing seat 12 has two purposes, one is to block the gap between the steel wire mesh 3 and the moving seat 4 to prevent the coal blocks and slag from entering, and the other is to provide support for the rubbing plate 13 behind, since the coal blocks and slag may be embedded in the hole of the steel wire mesh 3, it is necessary to constantly shake one end of the steel wire mesh 3 to make the steel wire mesh 3 constantly change the inclination angle, so the driving screw rod 21 drives the moving seat 4 to move downward, so that one end of the conical friction wheel 31 of the moving seat 4 is in contact with the downward friction groove 33 when it moves downward, and the conical friction wheel 31 is in contact with the upward friction strip 32 when it moves upward, so that it always rotates counterclockwise, thereby making the rubbing plate 13 always contact one end of the steel wire mesh 3.

[0043] And how to make the taper friction wheel 31 between the rising friction strip 32 and the falling friction groove 33 form switching, it is through the long chute 34 and the short chute 35 opened on one side of the support leg 1; when the switching block 37 is located in the long chute 34, the taper friction wheel 31 is in contact with the falling friction groove 33, the specific movement is: the switching block 37 is initially located at the top end of the long chute 34, at this time, as the moving seat 4 descends, the elastic block 39 on the switching block 37 begins to slide in the long chute 34, because the two ends of the short chute 35 are connected with the long chute, and the triangular guide block 36 is designed at the connection position, the inclined surface of the triangular guide block 36 at one end of the short chute 35 connected with the bottom of the long chute 34 faces the long chute 34, and the inclined surface of the triangular guide block 36 at the other end of the short chute 35 connected with the middle of the long chute 34 faces the short chute 35; therefore, when the elastic block 39 moves to the end of the short chute 35 connected with the bottom of the long chute 34, the elastic block 39 passes through the inclined surface of the triangular guide block 36 and begins to compress the reset spring 38, and comes to the inside of the short chute 35, at this time, the moving seat 4 rises, the taper friction wheel 31 is displaced and in contact with the rising friction strip 32, when the elastic block 39 moves to the other end of the short chute 35 connected with the middle of the long chute 34, the elastic block 39 passes through the inclined surface of the triangular guide block 36 and begins to compress the reset spring 38, and comes to the inside of the long chute 34, at this time, the moving seat 4 descends, the taper friction wheel 31 is displaced and in contact with the falling friction groove 33.

[0044] Please refer to Figure 10 and Figure 12 As shown in the drawings, the bottom end of the pressing seat 12 is fixedly connected with a connecting block 51, the platen 13 is provided with a groove, the connecting block 51 is located in the groove, and a first spring 52 is connected between the side wall of the groove and the connecting block 51, so that the connecting block 51 is in sliding connection with the platen 13; one end of the two platens 13 is fixedly connected with a connecting rod 53, and the side of the corresponding support leg 1 is fixedly connected with a protruding block 54, the outer wall of the connecting rod 53 is in contact with the outer wall of the protruding block 54, and the protruding heights of the protruding blocks 54 are different; in order to provide irregular shaking force for the steel wire mesh 3, the protruding block 54 is arranged on one side of the support leg 1, and the protruding heights of the protruding blocks 54 are different; when the moving seat 4 descends, the connecting rod 53 on the platen 13 runs along the outer surface of the protruding block 54, the platen 13 is connected with the connecting block 51 through the first spring 52, and because the pressing seat 12 moves downward at this time, the platen 13 can only move along the length direction of the pressing seat 12, so the connecting rod 53 carries the platen 13 to move along the protruding direction of the protruding block 54, and then resets through the first spring 52, so that the spherical blocks on the platen 13 continuously rub against the steel wire mesh 3 to form shaking.

[0045] The working principle of a thick coal seam high fully-mechanized caving coal mine roadway roof support truss device:

[0046] The initial state of the coal mine roadway roof truss device is that the first support plate 2 and the second support plate 15 are close to the coal mine roadway roof, and are fixed on the roadway roof by anchor rods, and the support leg 1 provides support force for the first support plate 2 and the second support plate 15, the steel wire mesh 3 is arranged between the first support plate 2 and the second support plate 15, one end of the steel wire mesh 3 is hinged to the second support plate 15, the other end is installed on the moving seat 4 of the first support plate 2, and the L-shaped roof 11 top abuts against the edge of the steel wire mesh 3 close to the moving seat 4, avoiding that the steel wire mesh 3 is not close to the roadway roof.

[0047] When it is necessary to clean the coal and slag falling off the steel wire mesh 3, first, start two motors, the motors drive two drive threaded rods 21, because the two ends of the driving plate 8 are threadedly connected with the drive threaded rods 21, so the driving plate 8 is lowered, because the driving plate 8 is provided with a pull rod 14, and there is movement redundancy between the pull rod 14 and the moving seat 4, so at the beginning, the driving plate 8 is lowered, the driving plate 8 drives the first connecting plate 9 and the second connecting plate 10 to lower, so that the original L-shaped roof 11 gradually does not contact the steel wire mesh 3, with the lowering of the driving plate 8, the pull rod 14 drives the moving seat 4 to lower, at this time, the steel wire mesh 3 gradually begins to tilt, when the driving plate 8 is lowered to a certain position, the gear 26 and the rack 27 are engaged, the bidirectional threaded rod 23 rotates with the movement of the driving plate 8, at this time, the two threaded blocks 22 on the two second connecting plates 10 are close to each other, because there is a torsion spring between the driving plate 8 and the two first connecting plates 9, and there is a torsion spring between the first connecting plate 9 and the second connecting plate 10, and the directions of their elastic forces are opposite, at this time, the close of the two threaded blocks 22 makes the first connecting plate 9 rotate upward along the hinge of the driving plate 8, and the second connecting plate 10 rotates downward along the hinge of the first connecting plate 9, at this time, the driving plate 8, the first connecting plate 9 and the second connecting plate 10 are formed into a M-shaped type from the original U-shaped type, this design is to avoid that the coal and slag fall on the L-shaped roof 11 and the driving plate 8 when the steel wire mesh 3 tilts, so as to affect the later operation, because the close of the threaded blocks 22, the second connecting plate 10 is folded, at this time, the threaded blocks 22 rotate 60 degrees relative to the second connecting plate 10, at this time, the large sprocket 24 also rotates, finally making the small sprocket 25 rotate, the gear ratio of the large sprocket 24 and the small sprocket 25 is 3:1, so the large sprocket 24 rotates 60 degrees, and the small sprocket 25 rotates 180 degrees, the L-shaped roof 11 is retracted.

[0048] At the same time, one end of the steel wire mesh 3 needs to tilt, so the length needs to change, at this time, the steel wire mesh 3 pulls the flexible steel wire rope 7, so that the tension spring 6 is stretched, and the length of the steel wire mesh 3 is changed, to adapt to the subsequent operation.

[0049] Because the side of the leg 1 of the first support plate 2 bottom is designed with the rising friction strip 32 and the falling friction groove 33, the falling of the moving seat 4 will make the conical friction wheel 31 friction contact with the falling friction groove 33, and the rotation of the conical friction wheel 31 will drive the one end of the lever 310 to rotate along the center of the conical friction wheel 31, so that the lower pressing seat 12 falls along the two sides of the moving seat 4, and the falling of the lower pressing seat 12 has two purposes: one is to block the gap between the steel wire mesh 3 and the moving seat 4, avoiding the coal block and slag entering; the other is to provide support for the following rubbing plate 13, because the coal block and slag may be embedded in the hole of the steel wire mesh 3, so it is necessary to constantly shake one end of the steel wire mesh 3 to make the steel wire mesh 3 change the inclination angle constantly, so that the driving threaded rod 21 drives the moving seat 4 to fall, and when the one end of the conical friction wheel 31 falls and contacts with the falling friction groove 33, the conical friction wheel 31 contacts with the rising friction strip 32 when rising, so that it always forms counterclockwise rotation, so that the rubbing plate 13 always contacts one end of the steel wire mesh 3; and the conical friction wheel 31 can switch between the rising friction strip 32 and the falling friction groove 33: that is, the long sliding groove 34 and the short sliding groove 35 are opened on the side of the leg 1 of the first support plate 2 bottom, when the switching block 37 is located in the long sliding groove 34, the conical friction wheel 31 contacts with the falling friction groove 33, and the specific movement is: the switching block 37 is initially located at the top end of the long sliding groove 34, at this time, as the moving seat 4 falls, the elastic block 39 on the switching block 37 begins to slide in the long sliding groove 34, because the short sliding groove 35 is provided with the triangular guide block 36 at both ends of the communication with the long sliding groove 34, the inclined surface of the triangular guide block 36 at the end of the short sliding groove 35 connected with the bottom of the long sliding groove 34 faces the long sliding groove 34, and the inclined surface of the triangular guide block 36 at the middle of the short sliding groove 35 connected with the long sliding groove 34 faces the short sliding groove 35, so when the elastic block 39 moves to the end of the short sliding groove 35 connected with the bottom of the long sliding groove 34, the elastic block 39 passes through the inclined surface of the triangular guide block 36 at this position, starts to compress the reset spring 38, and comes to the inside of the short sliding groove 35, at this time, as the moving seat 4 rises, the conical friction wheel 31 is displaced and contacts with the rising friction strip 32, when the elastic block 39 moves to the end of the short sliding groove 35 connected with the middle of the long sliding groove 34, the elastic block 39 passes through the inclined surface of the triangular guide block 36 at this position, starts to compress the reset spring 38, and comes to the inside of the long sliding groove 34, at this time, as the moving seat 4 falls, the conical friction wheel 31 is displaced and contacts with the falling friction groove 33.

[0050] At this time, in order to provide irregular shaking force for the steel wire mesh 3, the protruding blocks 54 are designed on the side of the supporting leg 1 of the first supporting plate 2 bottom, and the heights of the protruding blocks are all different, when the moving seat 4 is lowered, the connecting stick 53 on the rubbing plate 13 runs along the outer surface of the protruding blocks 54, the first spring 52 is connected between the rubbing plate 13 and the connecting block 51, due to the downward movement of the pressing seat 12, and the rubbing plate 13 can only move along the length direction of the pressing seat 12, so the connecting stick 53 carries the rubbing plate 13 to move along the protruding direction of the protruding blocks 54, and then resets through the first spring 52, so that the spherical blocks on the rubbing plate 13 continuously rub the steel wire mesh 3 to form shaking, and the coal blocks and slag pieces clamped in the apertures of the steel wire mesh 3 are shaken off.

[0051] It is to be understood that the terminology used herein such as first and second, etc. is only used to distinguish one entity or action from another entity or action, and does not necessarily require or imply that there is any such actual relationship or order between the entities or actions. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0052] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific embodiments of the present application cannot be limited to this. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the present application, and all of them should be regarded as falling within the scope of patent protection determined by the submitted claims.

Claims

1. A roof support truss device for a coal mine roadway in a high-slack coal seam mining operation, characterized in that, It includes a first support plate (2) fixed in the middle of the bottom of the tunnel roof and a second support plate (15) fixed on both sides of the bottom of the tunnel roof; both sides of the first support plate (2) and the second support plate (15) are connected to support legs (1); a wire mesh (3) is provided between the first support plate (2) and the second support plates (15) on both sides; a movable seat (4) is slidably installed between the top ends of the two support legs (1) at the bottom of the first support plate (2); one end of the wire mesh (3) is connected to the movable seat (4) by a tension spring (6), and the other end of the wire mesh (3) is hinged to the second support plate (15); A driving plate (8) is provided at the bottom of the movable seat (4). A pull rod (14) is symmetrically fixedly connected to the top of the driving plate (8). The pull rod (14) is slidably connected to the movable seat (4). First connecting plates (9) are symmetrically rotatably connected to both sides of the driving plate (8). A second connecting plate (10) is rotatably connected to the ends of the two first connecting plates (9) away from the driving plate (8). An L-shaped top plate (11) is rotatably installed at the ends of the two second connecting plates (10) away from each other. In the initial state, the top of the L-shaped top plate (11) abuts against... The edge of the wire mesh (3) is provided; between the two legs (1) at the bottom of the first support plate (2), a driving component is provided for driving the moving plate (8) to move. Torsion springs are installed at the connection between the moving plate (8) and the first connecting plate (9) and the connection between the first connecting plate (9) and the second connecting plate (10), and the forces of the torsion springs are opposite. The driving component drives the first connecting plate (9) and the second connecting plate (10) to move, so that the moving plate (8), the first connecting plate (9) and the second connecting plate (10) form an M-shaped structure from the U-shape. The movable seat (4) is symmetrically and slidably mounted with a pressure seat (12) on both sides. The bottom end of the pressure seat (12) is slidably mounted with a washboard (13) along the length direction. The bottom end of the pressure seat (12) is fixedly connected with a connecting block (51). A groove is provided on the washboard (13). The connecting block (51) is located in the groove. A first spring (52) is connected between the side wall of the groove and the connecting block (51), so that the connecting block (51) and the washboard (13) are slidably connected. A connecting rod (53) is fixedly connected to one end of the two washboards (13). A protrusion (54) is fixedly connected to one side of the corresponding support leg (1). The outer wall of the connecting rod (53) is in contact with the outer wall of the protrusion (54). The heights of the protrusions on the protrusion (54) are different.

2. The roof support truss device for a coal mine roadway in a high-slack coal seam according to claim 1, characterized in that, The driving component includes a driving threaded rod (21) and a bidirectional threaded rod (23). The two legs (1) connected to the first support plate (2) are rotatably equipped with driving threaded rods (21). The two legs (1) connected to the first support plate (2) are equipped with motors. The output end of the motor is fixedly connected to the corresponding driving threaded rod (21). The two ends of the driving plate (8) are threadedly connected to the corresponding driving threaded rods (21). The two second connecting plates (10) are rotatably equipped with threaded sliders (22) on one side. The two ends of the driving plate (8) are rotatably equipped with bidirectional threaded rods (23). The two ends of the bidirectional threaded rods (23) are threadedly connected to the corresponding threaded sliders (22).

3. The roof support truss device for a coal mine roadway in a high-slack coal seam according to claim 2, characterized in that, A large sprocket (24) is fixedly connected to one side of the threaded slider (22), a small sprocket (25) is fixedly connected to the connection between the L-shaped top plate (11) and the second connecting plate (10), the large sprocket (24) and the small sprocket (25) are connected by chain drive, a gear (26) is fixedly connected to the middle of the bidirectional threaded rod (23), and a rack (27) is fixedly connected to one side of the two legs (1) connected to the first support plate (2), and the gear (26) and the corresponding rack (27) are intermittently meshed.

4. The roof support truss device for ultra-thick coal seams in fully mechanized longwall mining as described in claim 3, characterized in that, The gear ratio of the large sprocket (24) to the small sprocket (25) is 3:

1.

5. The roof support truss device for ultra-thick coal seam high fully mechanized longwall mining roadways according to claim 1, characterized in that, The movable seat (4) is equipped with a pressure component at both ends. The bottom end of the rubbing board (13) is in contact with the top end of the wire mesh (3). The pressure component acts on the pressure seat (12), causing the pressure seat (12) to drive the rubbing board (13) to press on the wire mesh (3), which facilitates the cleaning of coal chunks and slag embedded in the wire mesh (3).

6. The roof support truss device for a coal mine roadway in a high-slack coal seam according to claim 5, characterized in that, The bottom end of the washboard (13) is fixedly connected with spherical blocks at equal intervals, and the spherical blocks are embedded in the holes of the wire mesh (3).

7. A roof support truss device for a coal mine roadway in a high-slack coal seam according to claim 5, characterized in that, The pressing component includes a conical friction wheel (31), an upward friction strip (32), and a downward friction groove (33); the conical friction wheel (31) is symmetrically slidably installed on the inner sides of both ends of the movable seat (4), and the upward friction strip (32) is symmetrically fixedly connected to the top of both ends of the first support plate (2). A downward friction groove (33) is opened on one side of the corresponding support leg (1). One side of the conical friction wheel (31) is rubbed against the downward friction groove (33). A long sliding groove (34) and a short sliding groove (35) are opened on both sides of the support leg (1) connected to the first support plate (2). One end of the short sliding groove (35) is connected to the bottom of the long sliding groove (34), and the short sliding groove (35) is connected to the bottom of the long sliding groove (34). 5) The other end is connected to the middle of the long slide (34), and the short slide (35) and the long slide (34) are both fixedly connected with triangular guide blocks (36); a switching block (37) is rotatably connected to one side of the conical friction wheel (31), the switching block (37) is slidably connected to the inner wall of the long slide (34), the reset spring (38) is fixedly connected inside the switching block (37), a spring block (39) is slidably connected to one end of the switching block (37), the spring block (39) is fixedly connected to the reset spring (38), the conical friction wheel (31) is fixedly connected with a lever (310), and the lever (310) is slidably connected to the lower pressure seat (12).

8. A roof support truss device for a coal mine roadway in a high-slack coal seam according to claim 7, characterized in that, The inclined surface of the triangular guide block (36) at the connection point between one end of the short slide (35) and the bottom of the long slide (34) faces the long slide (34), and the inclined surface of the triangular guide block (36) at the connection point between the other end of the short slide (35) and the middle of the long slide (34) faces the short slide (35).

9. A roof support truss device for a coal mine roadway in a high-slack coal seam according to claim 1, characterized in that, The movable seat (4) has a planar threaded groove (5) inside. Several tension springs (6) are fixedly installed inside the planar threaded groove (5). Several sets of flexible steel wire ropes (7) are fixedly connected to one end of the wire mesh (3). Several sets of flexible steel wire ropes (7) correspond one-to-one with several sets of tension springs (6) and are fixedly connected.

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