A shearer drum maintenance and overturning platform

Abstract

The present application belongs to the technical field of coal mine machinery maintenance equipment, and particularly relates to a shearer drum maintenance and turnover platform, which comprises a base, the upper surface of the base is fixedly connected with a square hollow column, and the two side outer walls of the square hollow column are both provided with a moving through hole. The maintenance and turnover platform has the functions of maintenance height adjustment and air purification, and has the function of automatic fastening during the turnover of the shearer drum. The maintenance height adjustment can match the position of the drum with the height of the maintenance personnel, so as to facilitate the maintenance personnel to maintain the drum, and the air purification can avoid the smoke from drifting during welding maintenance, thereby improving the environmental protection of the platform, improving the comfort of the maintenance personnel, ensuring the quality of the shearer drum maintenance, and reducing the labor intensity of the maintenance personnel. In addition, after the turnover of the drum, there is no situation that the local part is always blocked and cannot be maintained, thereby improving the comprehensiveness and efficiency of the drum maintenance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mine machinery maintenance equipment, and particularly relates to a shearer drum maintenance and turnover platform. BACKGROUND

[0002] During use of the shearer drum, the tooth part is prone to damage due to direct contact with coal and rock and bearing of great friction and impact forces, and the drum body may be broken due to uneven stress or encountering hard foreign objects. After these damages occur, the shearer drum can be repaired by replacing the tooth, welding the drum body, etc. The reason for repair is that on the one hand, the performance of the shearer is restored to ensure efficient coal mining operation, and on the other hand, the cost is reduced to avoid high expenses caused by replacing a new drum. At the same time, timely repair can reduce safety hazards and prevent accidents caused by drum failure, thereby ensuring the safety of coal mine production and the safety of workers' lives.

[0003] At present, in the process of repairing the shearer drum, a shearer drum turnover device is used to facilitate operation and improve repair efficiency. For example, patent authorization announcement No. CN216966821U discloses a shearer drum maintenance and turnover platform. However, when repairing the shearer drum on the maintenance and turnover platform, the shearer drum still needs to be fastened manually, which not only increases the labor intensity of shearer drum repair work, affects the convenience and efficiency of repair, but also causes the bottom of the shearer drum to always contact the placement platform, making it impossible to effectively turn over the shearer drum, so that the bottom of the shearer drum cannot be exposed for repair, thereby affecting the comprehensiveness of the repair and the reliability of the use of the turnover platform.

[0004] In addition, when the existing shearer drum is welded and repaired on the maintenance and turnover platform, the smoke generated often disperses everywhere, which greatly affects the performance of the maintenance and turnover platform in the shearer drum repair work in terms of environmental protection, and reduces its environmental protection performance. From the perspective of the repair personnel, once they inhale these dispersed welding smoke, they are prone to feel unwell, which will cause the accuracy of the repair personnel to decrease when repairing the shearer drum, thereby adversely affecting the repair quality of the shearer drum.

[0005] Therefore, a shearer drum maintenance and turnover platform is proposed to solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a shearer drum maintenance and turnover platform to solve the above problems.

[0007] In order to achieve the above object, the following technical scheme is adopted in the present application: a coal winning machine drum maintenance and overturning platform, comprising a base, a square hollow column is fixedly connected to the upper surface of the base, moving through holes are formed in the outer walls of the two sides of the square hollow column, and a hollow box is slidably connected to the hole walls of the two moving through holes, a screw sleeve is fixedly connected to the outer wall of the hollow box, a screw rod is threadedly connected to the inner wall of the screw sleeve, the two ends of the screw rod are connected to the two ends of the square hollow column through rolling bearings, the top end of the screw rod penetrates through the upper surface of the square hollow column and is fixedly connected to a driven gear, a driving assembly and an air purification mechanism are fixedly connected to the top end outer wall of the square hollow column;

[0008] A circular hole is formed in the side end of the hollow box, a bearing is fixedly connected to the hole wall of the circular hole, a rotating column is fixedly connected to the inner wall of the inner ring of the bearing, a first self-locking motor is fixedly connected to the outer wall of the hollow box, the output end of the first self-locking motor is fixedly connected to the inner side end of the rotating column through the inner wall of the hollow box, a U-shaped welded maintenance and overturning platform is fixedly sleeved to the outer end of the rotating column, and a limiting mechanism is connected to the inner wall of the U-shaped welded maintenance and overturning platform;

[0009] An arc-shaped rod is fixedly connected to the side end of the U-shaped welded maintenance and overturning platform, a through hole is formed in the side end of the arc-shaped rod, and a balancing mechanism is connected to the hole wall of the through hole;

[0010] An electric hydraulic rod is fixedly connected to the upper surface of the square hollow column;

[0011] An installation plate is fixedly connected to the upper surface of the base, a PLC controller is fixedly connected to the outer surface of the installation plate, and the input end of the PLC controller is electrically connected to a control switch;

[0012] The limiting mechanism comprises a fixed cover and a movable cover, the outer wall of the fixed cover is fixedly connected to one side of the inner wall of the U-shaped welded maintenance and overturning platform, the outer wall of the movable cover is in movable contact with the other side of the inner wall of the U-shaped welded maintenance and overturning platform, a multi-stage electric hydraulic push rod is fixedly connected to the outer wall of the movable cover, an installation hole is formed in the outer wall of the U-shaped welded maintenance and overturning platform and matches the outer surface of the multi-stage electric hydraulic push rod, a circular hole is formed in the opposite side of the fixed cover and the movable cover, and a supporting cover is connected to the hole wall of the circular hole through a rotating bearing, a third self-locking motor is fixedly connected to the inner wall of the U-shaped welded maintenance and overturning platform, and a fourth self-locking motor is fixedly connected to the inner wall of the movable cover;

[0013] The output end of the third self-locking motor and the fourth self-locking motor is fixedly connected with a rectangular block, the inner wall of the support cover is provided with a connecting groove matched with the rectangular block, the opposite side of the two support covers is fixedly embedded with a plurality of rubber anti-skid blocks, the end of the support cover away from the rubber anti-skid block is fixedly connected with a plurality of universal ball bearings, and the output end of the third self-locking motor and the fourth self-locking motor is connected with the inner wall of the two support covers through the rectangular block respectively.

[0014] The balance mechanism comprises a mounting bearing fixedly connected with the inner wall of the through hole of the arc-shaped rod, a fixed tube fixedly connected with the inner wall of the mounting bearing, a conductive slip ring and a connecting ring fixedly connected with the two ends of the fixed tube respectively, a steel wire rope fixedly connected with the outer wall of the connecting ring, a hollow moving block fixedly connected with the moving end of the electric hydraulic rod, a T-shaped block slidingly connected with the inner wall of the hollow moving block, the lateral rod side end of the T-shaped block penetrating through the outer wall of the hollow moving block and being fixedly connected with the top end of the steel wire rope, a connecting hole and a rectangular hole matched with the outer wall of the lateral rod of the T-shaped block being formed in the side end of the hollow moving block, and a pressing switch fixedly connected with the hole wall of the connecting hole.

[0015] The outer wall of the steel wire rope is movably connected with a fixed pulley, the bottom end of the frame body of the fixed pulley is fixedly connected with the upper surface of the hollow plate, and the outer wall of the lateral rod of the T-shaped block movably sleeves the reset spring.

[0016] In the above-described coal mining machine drum maintenance and overturning platform, the driving assembly comprises a second self-locking motor fixedly connected with the outer wall of the top end of the square hollow column, and the output end of the second self-locking motor is fixedly connected with a driving gear engaged with a driven gear.

[0017] In the above-described coal mining machine drum maintenance and overturning platform, the air purification mechanism comprises a hollow plate fixedly connected with the outer wall of the top end of the square hollow column, a plurality of air inlet holes are formed in the lower surface of the hollow plate, a purification box is fixedly connected with the upper surface of the hollow plate, a gas pump is fixedly connected with the inner wall of the purification box, the air inlet end of the gas pump penetrates through the bottom end of the purification box and the top end of the hollow plate and communicates with the internal cavity of the hollow plate, two meshed plates are fixedly connected with the inner wall of the purification box, the outer walls of the two meshed plates are movably connected with an activated carbon composite filter element, a rectangular hole is formed in the top end of the purification box, and the hole wall of the rectangular hole is connected with a cover matched with the top end of the activated carbon composite filter element, the top end of the cover is fixedly connected with the top end of the purification box through bolts, and an exhaust bellows is fixedly connected with the side end of the purification box, and two directional iron wires are fixedly connected with the inner wall of the exhaust bellows.

[0018] In the above-described coal mining machine drum maintenance and overturning platform, the upper surface of the base is fixedly connected with a plurality of right-angle reinforcing blocks, and the side wall of the right-angle reinforcing block is fixedly connected with the outer wall of the square hollow column.

[0019] Compared with the existing technology, the advantages of a coal mining machine drum maintenance turning platform are:

[0020] 1. Through the provided screw, drive assembly and U-shaped welding maintenance flip platform, when the shearer drum is welded and repaired on the maintenance flip platform, the electric hydraulic rod pulls the wire rope and the arc rod to balance the forces at both ends of the U-shaped welding maintenance flip platform, avoiding long-term unilateral force deformation of the platform and improving the stability of the shearer drum. At the same time, the drive assembly cooperates with the screw, barrel sleeve and hollow box to adjust the height of the shearer drum on the U-shaped welding maintenance flip platform, so that the height of the shearer drum matches the height of the maintenance personnel, thereby facilitating maintenance work, improving welding maintenance efficiency and the working comfort of maintenance personnel.

[0021] 2. Through the air purification mechanism, when the coal mining machine drum is welded and maintained on the maintenance turning platform, the air purification mechanism can absorb the smoke generated by the welding of the coal mining machine drum to prevent the smoke from polluting the environment and causing discomfort to the maintenance personnel. In the high temperature environment in summer, clean air can be sprayed to the maintenance personnel to cool them down, allowing them to work comfortably, improving the accuracy of welding maintenance and ensuring the quality of maintenance.

[0022] 3. By setting up the first self-locking motor, U-shaped welding maintenance flipping platform and limiting mechanism, when the coal mining machine drum needs to be flipped over for maintenance, the coal mining machine drum is first clamped by the limiting mechanism, and then the first self-locking motor is started. The first self-locking motor rotates the U-shaped welding maintenance flipping platform 180 degrees through the rotating column, and drives the coal mining machine drum to flip. The limiting mechanism enables the coal mining machine drum to be automatically tightened during the flipping process, without manual operation, saving time and effort. This mechanism enables the coal mining machine drum maintenance flipping platform to have the function of automatic tightening during the flipping process, and no manual assistance is required, which reduces the labor intensity of maintenance personnel. At the same time, after the coal mining machine drum is flipped, there is no situation where part of it is always blocked and cannot be repaired, thereby improving the comprehensiveness of coal mining machine drum maintenance, as well as improving the convenience and efficiency of coal mining machine drum maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a coal mining machine drum maintenance and turning platform provided by the present invention;

[0024] Figure 2 This is a structural schematic diagram of an air purification mechanism in a coal mining machine drum maintenance and turnover platform provided by the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a portion of a limiting mechanism in a coal mining machine drum maintenance and turning platform provided by the present invention;

[0026] Figure 4 This is a structural schematic diagram of a balancing mechanism in a coal mining machine drum maintenance and turnover platform provided by the present invention;

[0027] Figure 5 is a structural schematic view of the exhaust bellows in the coal winning machine drum maintenance and turnover platform provided by the application;

[0028] Figure 6 is a structural schematic view of the rubber anti-skid block part in the coal winning machine drum maintenance and turnover platform provided by the application;

[0029] Figure 7 is a structural schematic view of the U-shaped welded maintenance and turnover platform in the coal winning machine drum maintenance and turnover platform provided by the application.

[0030] In the figure: 1 base, 2 square hollow column, 3 moving through hole, 4 hollow box, 5 screw cylinder cover, 6 drive assembly, 61 second self-locking motor, 62 driving gear, 63 electric hydraulic rod, 7 air purification mechanism, 71 hollow plate, 72 air inlet hole, 73 purification box, 74 air pump, 75 net partition, 76 activated carbon composite filter element, 77 cover, 78 exhaust bellows, 79 directional iron wire, 8 limiting mechanism, 81 fixed cover, 82 movable cover, 83 multi-stage electric hydraulic push rod, 84 support cover, 85 third self-locking motor, 86 fourth self-locking motor, 9 balancing mechanism, 91 mounting bearing, 92 fixed tube, 93 conductive slip ring, 94 connecting ring, 95 steel wire rope, 96 hollow moving block, 97 T-shaped block, 98 press switch, 10 screw rod, 11 driven gear, 12 bearing, 13 rotating column, 14 first self-locking motor, 15 U-shaped welded maintenance and turnover platform, 16 arc-shaped rod, 17 mounting plate, 18 PLC controller, 19 control switch, 20 rectangular block, 21 rubber anti-skid block, 22 universal ball, 23 fixed pulley, 24 return spring, 25 right-angle reinforcing block. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0032] As Figures 1-7As shown, a coal winning machine drum maintenance turnover platform, including base 1, the upper surface of base 1 is fixedly connected with square hollow column 2, the both sides of square hollow column 2 are provided with moving through hole 3, and the hole wall of two moving through holes 3 is slidably connected with hollow box 4, the outer wall of hollow box 4 is fixedly connected with screw sleeve 5, the inner wall of screw sleeve 5 is threadedly connected with screw rod 10, the both ends of screw rod 10 are connected with the both ends of square hollow column 2 through rolling bearing, the top end of screw rod 10 penetrates through the upper surface of square hollow column 2, and is fixedly connected with driven gear 11, the top end outer wall of square hollow column 2 is fixedly connected with driving assembly 6 and air purification mechanism 7, driving assembly 6 includes second self-locking motor 61 fixedly connected with the top end outer wall of square hollow column 2, the output end of second self-locking motor 61 is fixedly connected with driving gear 62 engaged with driven gear 11, the upper surface of square hollow column 2 is fixedly connected with electric hydraulic rod 63.

[0033] Air purification mechanism 7 includes hollow plate 71 fixedly connected with the top end outer wall of square hollow column 2, a plurality of air inlet holes 72 are formed in the lower surface of hollow plate 71, the upper surface of hollow plate 71 is fixedly connected with purification box 73, the inner wall of purification box 73 is fixedly connected with air pump 74, the air inlet end of air pump 74 penetrates through the bottom end of purification box 73 and the top end of hollow plate 71, and communicates with the internal cavity of hollow plate 71, the inner wall of purification box 73 is fixedly connected with two net partition plates 75, the outer walls of two net partition plates 75 are movably connected with activated carbon composite filter element 76, the top end of purification box 73 is provided with rectangular hole, and the hole wall of rectangular hole is connected with cover 77 matched with the top end of activated carbon composite filter element 76, the top end of cover 77 is fixedly connected with the top end of purification box 73 through bolts, the side end of purification box 73 is fixedly connected with exhaust bellows 78, the inner wall of exhaust bellows 78 is fixedly connected with two directional iron wires 79, the mechanism makes the coal winning machine drum maintenance turnover platform have air purification function, avoids smoke diffusion during welding maintenance, not only improves the environmental protection of coal winning machine drum maintenance turnover platform, but also improves the comfort of maintenance personnel work, thereby ensuring the quality of coal winning machine drum maintenance.

[0034] The side end of the hollow box 4 is provided with a circular hole, and the hole wall of the circular hole is fixedly connected with a bearing 12, the inner wall of the inner ring of the bearing 12 is fixedly connected with a rotating column 13, the outer wall of the hollow box 4 is fixedly connected with a first self-locking motor 14, the output end of the first self-locking motor 14 is fixedly connected with the inner side end of the rotating column 13 through the inner wall of the hollow box 4, the outer end of the rotating column 13 is fixedly sleeved with a U-shaped welded maintenance turnover platform 15, the inner wall of the U-shaped welded maintenance turnover platform 15 is connected with a limiting mechanism 8, the limiting mechanism 8 comprises a fixed cover 81 and a movable cover 82, the outer wall of the fixed cover 81 is fixedly connected with one side inner wall of the U-shaped welded maintenance turnover platform 15, the outer wall of the movable cover 82 is in movable contact with the other side inner wall of the U-shaped welded maintenance turnover platform 15, the outer wall of the movable cover 82 is fixedly connected with a multi-stage electric hydraulic push rod 83, the outer wall of the U-shaped welded maintenance turnover platform 15 is provided with a mounting hole matched with the outer surface of the multi-stage electric hydraulic push rod 83, the opposite sides of the fixed cover 81 and the movable cover 82 are both provided with a circular hole, and the hole wall of the circular hole is connected with a support cover 84 through a rotating bearing, the inner wall of the U-shaped welded maintenance turnover platform 15 is fixedly connected with a third self-locking motor 85, the inner wall of the movable cover 82 is fixedly connected with a fourth self-locking motor 86, the output ends of the third self-locking motor 85 and the fourth self-locking motor 86 are both fixedly connected with a rectangular block 20, the inner wall of the support cover 84 is provided with a connecting groove matched with the rectangular block 20, the opposite sides of the two support covers 84 are both fixedly embedded with a plurality of rubber anti-skid blocks 21, the end of the support cover 84 away from the rubber anti-skid block 21 is fixedly connected with a plurality of universal ball bearings 22, the universal ball bearings 22 can support the support cover 84 and facilitate the rotation of the support cover 84, the output ends of the third self-locking motor 85 and the fourth self-locking motor 86 are respectively connected with the inner walls of the two support covers 84 through the rectangular blocks 20, this mechanism has the function of automatic fastening during the turnover of the coal winning machine drum maintenance turnover platform, and does not need manual assistance, which reduces the labor intensity of the maintenance personnel, at the same time, after the turnover of the coal winning machine drum, there is no situation that local shielding exists and maintenance cannot be carried out, which improves the comprehensiveness of the maintenance of the coal winning machine drum.

[0035] The side end of the U-shaped welding repair turnover platform 15 is fixedly connected with an arc-shaped rod 16, a through hole is formed in the side end of the arc-shaped rod 16, and a balancing mechanism 9 is connected to the hole wall of the through hole. The balancing mechanism 9 comprises a mounting bearing 91 fixedly connected to the inner wall of the upper through hole of the arc-shaped rod 16, a fixed tube 92 fixedly connected to the inner wall of the mounting bearing 91, an electrically conductive slip ring 93 and a connecting ring 94 fixedly connected to the two ends of the fixed tube 92 respectively, the electrically conductive slip ring 93 being used for circuit cooperation in the device rotating structure, avoiding the winding of the power supply wire in the device rotating structure, ensuring the reliability of the device in the power supply line, the outer wall of the connecting ring 94 being fixedly connected with a steel wire rope 95, the moving end of the electric hydraulic rod 63 being fixedly connected with a hollow moving block 96, the inner wall of the hollow moving block 96 being slidably connected with a T-shaped block 97, the outer wall of the steel wire rope 95 being movably connected with a fixed pulley 23, the bottom end of the frame body of the fixed pulley 23 being fixedly connected with the upper surface of the hollow plate 71, the outer wall of the horizontal rod of the T-shaped block 97 movably sleeving a return spring 24, the elastic force of the return spring 24 being capable of conveniently resetting the T-shaped block 97 in the hollow moving block 96, the side end of the hollow moving block 96 being provided with a connecting hole and a rectangular hole matched with the outer wall of the horizontal rod of the T-shaped block 97, and the hole wall of the connecting hole being fixedly connected with a press switch 98. By controlling the moving end of the electric hydraulic rod 63 to retract through the control switch 19, the arc-shaped rod 16 is pulled again through the steel wire rope 95, the stress balance of the U-shaped welding repair turnover platform 15 is ensured, and the stability of the U-shaped welding repair turnover platform 15 in use is improved.

[0036] The upper surface of the base 1 is fixedly connected with a mounting plate 17, the outer surface of the mounting plate 17 is fixedly connected with a PLC controller 18, the input end of the PLC controller 18 is electrically connected with a control switch 19, the upper surface of the base 1 is fixedly connected with a plurality of right-angle reinforcing blocks 25, the side wall of the right-angle reinforcing block 25 is fixedly connected with the outer wall of the square hollow column 2, the right-angle reinforcing block 25 can improve the stability of the connection between the base 1 and the square hollow column 2, the second self-locking motor 62, the multi-stage electric hydraulic push rod 83, the third self-locking motor 85, the fourth self-locking motor 86 and the first self-locking motor 14 are electrically connected with the PLC controller 18, the air pump 74 is electrically connected with an external power supply through the press switch 98, and the above power supply equipment and electrical connection are prior art and will not be described herein.

[0037] The operating principle of the present invention is described as follows: When the damaged shearer drum needs welding repair, the damaged shearer drum is first moved to the U-shaped welding repair flip platform 15, and then the shearer drum is placed on the support cover 84 at the fixed cover 81. At this time, due to the heavy weight of the shearer drum, the U-shaped welding repair flip platform 15 away from the rotating column 13 will be slightly deformed. This deformation will pull the T-shaped block 97 to move through the wire rope 95 of the balancing mechanism 9. When the T-shaped block 97 moves on the hollow moving block 96, It will not only squeeze the return spring 24, but also squeeze the push switch 98. When the push switch 98 is energized, it will start the air purification mechanism 7. At the same time, the energized push switch 98 also sends an electrical signal to the PLC controller 18. The PLC controller 18 controls the moving end of the electric hydraulic rod 63 to retract a certain distance. At the initial stage of the retraction of the moving end of the electric hydraulic rod 63, the moving rod of the electric hydraulic rod 63 drives the hollow moving block 96 to move. The hollow moving block 96 pulls the wire rope 95 through the T-shaped block 97, and the tension of the wire rope 95 is used to pull the connecting ring 94 , the tension on the connecting ring 94 acts on the fixed tube 92, and then the fixed tube 92 can pull the arc rod 16 upward, and the fixed rod 16 causes the U-shaped welding maintenance flip platform 15 to be pulled upward on the side away from the rotating column 13. The upward pulling force of the arc rod 16 balances the squeezing of the rotating column 13 by the U-shaped welding maintenance flip platform 15 and the coal mining machine drum, and balances the forces on both sides of the U-shaped welding maintenance flip platform 15. At this time, the staff suspends the retraction of the electric hydraulic rod 63 by operating the switch 19, so that the wire rope The rope 95 keeps the curved rod 16 pulled, further preventing the U-shaped welding maintenance flip platform 15 from being deformed and damaged by the gravity of the shearer drum on one side due to being located at the rotating column 13 for a long time, and can improve the stability of the shearer drum on the U-shaped welding maintenance flip platform 15. When the shearer drum is not placed on the U-shaped welding maintenance flip platform 15, the pressure exerted by the U-shaped welding maintenance flip platform 15 on the rotating column 13 is small, and the rotating column 13 can reliably support the U-shaped welding maintenance flip platform 15.

[0038] Then, if the height of the coal mining machine drum does not match the height of the maintenance personnel and causes inconvenience in maintenance, the second self-locking motor 61 is started by operating the switch 19 and the PLC controller 18, the second self-locking motor 61 rotates the screw rod 10 counterclockwise or clockwise through the driving gear 62 and the driven gear 11, then the rotating screw rod 10 can adjust the height of the drum sleeve 5 and the hollow box 4, and when the height of the hollow box 4 is adjusted, the U-shaped welding maintenance turnover platform 15 can be adjusted in height by rotating the column 13, so that the height of the coal mining machine drum on the U-shaped welding maintenance turnover platform 15 matches the height of the maintenance personnel, thereby facilitating the maintenance personnel to maintain the damaged coal mining machine drum, and the second self-locking motor 61 is stopped after the height of the U-shaped welding maintenance turnover platform 15 is appropriate, because the second self-locking motor 61 has self-locking capability, the U-shaped welding maintenance turnover platform 15 with the adjusted height will not change, at the same time, the electric hydraulic rod 63 is controlled to move the end to contract by operating the switch 19, so that the steel wire rope 95 pulls the arc-shaped rod 16 again to ensure that the U-shaped welding maintenance turnover platform 15 is in force balance, the mechanism enables the coal mining machine drum maintenance turnover platform to have the function of adjusting the maintenance height, so that the maintenance personnel can conveniently maintain the coal mining machine drum, improve the efficiency of the coal mining machine drum welding maintenance, and improve the comfort of the maintenance personnel's work.

[0039] During the welding maintenance of the coal mining machine drum, the air pump 74 of the air purification mechanism 7 is started by the press switch 98, the air pump 74 sucks the smoke generated during the welding maintenance of the coal mining machine drum through the hollow plate 71 and the air inlet hole 72, the smoke is adsorbed and intercepted by the activated carbon composite filter element 76 in the purification box 73, and finally the clean air is discharged through the exhaust bellows 78, which can avoid the smoke generated during the welding maintenance of the coal mining machine drum from polluting the environment, and avoid the maintenance personnel from inhaling the welding smoke for a long time and feeling uncomfortable, and in the summer high temperature environment, the maintenance personnel controls the exhaust direction of the exhaust bellows 78 by the directional iron wire 79, the directional iron wire 79 has the characteristic of being arbitrarily bent, and by bending the directional iron wire 79, the exhaust direction of the exhaust bellows 78 can be stabilized, so that the clean air in the exhaust bellows 78 is sprayed to the maintenance personnel, which is convenient for the maintenance personnel to cool down, thereby enabling the maintenance personnel to work comfortably in the summer high temperature environment, and improving the precision of the welding maintenance of the coal mining machine drum and ensuring the maintenance quality of the coal mining machine drum.

[0040] During the welding maintenance process of the coal mining machine drum, the third self-locking motor 85 is controlled to rotate slowly through the operation switch 19 and the PLC controller 18, the third self-locking motor 85 rotates the supporting cover 84 on the fixed cover 81, and then the position of the coal mining machine drum is adjusted. At this time, due to the large weight of the coal mining machine drum, the friction force at the contact position between the coal mining machine drum and the surface of the supporting cover 84 is large, and the rubber anti-skid block 21 is matched, so that the situation that the coal mining machine drum falls during slow rotation can be avoided. Then, the third self-locking motor 85 is controlled to stop rotating after the coal mining machine drum is rotated to the position, so that the maintenance personnel can comprehensively maintain the side wall and the top surface of the coal mining machine drum. When the bottom of the coal mining machine drum needs to be maintained, the multi-stage electric hydraulic push rod 83 is controlled to extend through the operation switch 19 and the PLC controller 18, the multi-stage electric hydraulic push rod 83 pushes the movable cover 82 to approach the coal mining machine drum, and finally the movable cover 82 pushes the supporting cover 84 to clamp the top of the coal mining machine drum. The two supporting covers 84 can reliably clamp the coal mining machine drum. Then, the first self-locking motor 14 is controlled to rotate 180 degrees, the first self-locking motor 14 drives the U-shaped welding maintenance turnover platform 15 to rotate 180 degrees through the rotating column 13, the coal mining machine drum is turned over, and then the multi-stage electric hydraulic push rod 83 is controlled to retract. After the multi-stage electric hydraulic push rod 83 retracts, the coal mining machine drum is lowered through the movable cover 82, so that the coal mining machine drum is away from the fixed cover 81, and the maintenance personnel can conveniently maintain the top of the turned-over coal mining machine drum. The whole coal mining machine drum turnover maintenance process does not need manual fastening, and the turned-over coal mining machine drum can be comprehensively maintained. The mechanism has the function of automatic fastening during the turnover process of the coal mining machine drum maintenance turnover platform, and does not need manual assistance, reduces the labor intensity of the maintenance personnel, and at the same time, the turned-over coal mining machine drum does not exist the situation that local is always blocked and cannot be maintained, improves the comprehensiveness of the coal mining machine drum maintenance, and improves the convenience and efficiency of the coal mining machine drum maintenance.

[0041] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A shearer drum service turn platform comprising a base (1), characterised in that, The upper surface of the base (1) is fixedly connected with a square hollow column (2), both sides of the square hollow column (2) are provided with a moving through hole (3), and the hole walls of the two moving through holes (3) are slidably connected with a hollow box (4), the outer wall of the hollow box (4) is fixedly connected with a screw sleeve (5), the inner wall of the screw sleeve (5) is threadedly connected with a screw rod (10), both ends of the screw rod (10) are connected with both ends of the square hollow column (2) through rolling bearings, the top end of the screw rod (10) penetrates through the upper surface of the square hollow column (2) and is fixedly connected with a driven gear (11), the top end outer wall of the square hollow column (2) is fixedly connected with a driving assembly (6) and an air purification mechanism (7); The side end of the hollow box (4) is provided with a circular hole, and the hole wall of the circular hole is fixedly connected with a bearing (12), the inner wall of the inner ring of the bearing (12) is fixedly connected with a rotating column (13), the outer wall of the hollow box (4) is fixedly connected with a first self-locking motor (14), the output end of the first self-locking motor (14) is fixedly connected with the inner side end of the rotating column (13) through the inner wall of the hollow box (4), the outer end of the rotating column (13) is fixedly sleeved with a U-shaped welded maintenance turnover platform (15), the inner wall of the U-shaped welded maintenance turnover platform (15) is connected with a limiting mechanism (8); The side end of the U-shaped welded maintenance turnover platform (15) is fixedly connected with an arc-shaped rod (16), the side end of the arc-shaped rod (16) is provided with a through hole, and the hole wall of the through hole is connected with a balancing mechanism (9); The upper surface of the square hollow column (2) is fixedly connected with an electric hydraulic rod (63); The upper surface of the base (1) is fixedly connected with a mounting plate (17), the outer surface of the mounting plate (17) is fixedly connected with a PLC controller (18), and the input end of the PLC controller (18) is electrically connected with a control switch (19); The limiting mechanism (8) comprises a fixed cover (81) and a movable cover (82), the outer wall of the fixed cover (81) is fixedly connected with one side of the inner wall of the U-shaped welded maintenance turnover platform (15), the outer wall of the movable cover (82) is movably connected with the other side of the inner wall of the U-shaped welded maintenance turnover platform (15), the outer wall of the movable cover (82) is fixedly connected with a multi-stage electric hydraulic push rod (83), the outer wall of the U-shaped welded maintenance turnover platform (15) is provided with a mounting hole matched with the outer surface of the multi-stage electric hydraulic push rod (83), the opposite sides of the fixed cover (81) and the movable cover (82) are both provided with a circular hole, and the hole wall of the circular hole is connected with a supporting cover (84) through a rotating bearing, the inner wall of the U-shaped welded maintenance turnover platform (15) is fixedly connected with a third self-locking motor (85), and the inner wall of the movable cover (82) is fixedly connected with a fourth self-locking motor (86). The output end of the third self-locking motor (85) and the fourth self-locking motor (86) is fixedly connected with a rectangular block (20), the inner wall of the support cover (84) is provided with a connecting groove matched with the rectangular block (20), the opposite side of the two support covers (84) is fixedly embedded with a plurality of rubber anti-skid blocks (21), the end of the support cover (84) away from the rubber anti-skid block (21) is fixedly connected with a plurality of universal ball bearings (22), and the output end of the third self-locking motor (85) and the fourth self-locking motor (86) is connected with the inner wall of the two support covers (84) through the rectangular block (20) respectively. The balance mechanism (9) comprises a mounting bearing (91) fixedly connected with the inner wall of the through hole of the arc-shaped rod (16), a fixed tube (92) fixedly connected with the inner wall of the mounting bearing (91), a conductive slip ring (93) and a connecting ring (94) fixedly connected with the two ends of the fixed tube (92) respectively, a steel wire rope (95) fixedly connected with the outer wall of the connecting ring (94), a hollow moving block (96) fixedly connected with the moving end of the electric hydraulic rod (63), a T-shaped block (97) slidably connected with the inner wall of the hollow moving block (96), and the lateral rod side end of the T-shaped block (97) penetrates through the outer wall of the hollow moving block (96) and is fixedly connected with the top end of the steel wire rope (95). The outer wall of the steel wire rope (95) is movably connected with a fixed pulley (23), the bottom end of the frame body of the fixed pulley (23) is fixedly connected with the upper surface of the hollow plate (71), and the outer wall of the lateral rod of the T-shaped block (97) movably sleeves a return spring (24).

2. A shearer drum service inversion platform according to claim 1 wherein, The driving assembly (6) comprises a second self-locking motor (61) fixedly connected with the outer wall of the top end of the square hollow stand column (2), and the output end of the second self-locking motor (61) is fixedly connected with a driving gear (62) engaged with a driven gear (11).

3. A shearer drum service inversion platform according to claim 1 wherein, The air purification mechanism (7) comprises a hollow plate (71) fixedly connected with the outer wall of the top end of the square hollow column (2), a plurality of air inlet holes (72) are formed in the lower surface of the hollow plate (71), a purification box (73) is fixedly connected with the upper surface of the hollow plate (71), an air pump (74) is fixedly connected with the inner wall of the purification box (73), the air inlet end of the air pump (74) penetrates through the bottom end of the purification box (73) and the top end of the hollow plate (71) and communicates with the internal cavity of the hollow plate (71), two net partition plates (75) are fixedly connected with the inner wall of the purification box (73), the outer walls of the two net partition plates (75) are movably connected with an activated carbon composite filter element (76), a rectangular hole is formed in the top end of the purification box (73), the hole wall of the rectangular hole is connected with a cover (77) matched with the top end of the activated carbon composite filter element (76), the top end of the cover (77) is fixedly connected with the top end of the purification box (73) through bolts, an exhaust bellows (78) is fixedly connected with the side end of the purification box (73), and two directional iron wires (79) are fixedly connected with the inner wall of the exhaust bellows (78).

4. A shearer drum service inversion platform according to claim 1 wherein, The upper surface of the base (1) is fixedly connected with a plurality of right-angle reinforcing blocks (25), and the side wall of the right-angle reinforcing block (25) is fixedly connected with the outer wall of the square hollow column (2).

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