A frozen coal cleaning device for dumper hopper grate

Abstract

The present invention relates to a frozen coal cleaning device for a dumper hopper bin grate, which is characterized by comprising a steel rail, a flexible mobile shovel unit and an elastic crushing unit, steel rails are symmetrically arranged on the left and right sides of the bin grate, an elastic crushing unit is installed at the front end of the bin grate, and a flexible mobile shovel unit slidably installed on the steel rail is provided at the rear end of the bin grate. The present invention can effectively avoid the problem of large frozen coal piles climbing up, can assist the dumper to work efficiently, and meet the requirements of safe and efficient coal transportation.

Description

Technical Field

[0001] The invention relates to the technical field of frozen coal cleaning, and in particular to a frozen coal cleaning device for a hopper grate of a dumper. Background Art

[0002] The raw coal is formed into finished coal after coal washing. Unloading is an indispensable step in the transportation of finished coal. Since the coal blocks themselves are of different sizes and it is cold in winter, the coal blocks have a certain humidity, resulting in a large number of frozen coal blocks. During the bumpy long-distance transportation, the frozen coal blocks located lower in the car will be further compacted with the bumps, and the volume of the frozen coal will further increase. After a large amount of frozen coal is unloaded onto the grate by the tipper, the grate mouth will be blocked, causing the main coal unloading point to be blocked, and gradual accumulation will cause the grate to completely fail.

[0003] The traditional way to solve the problem of frozen coal blocks blocking the grate mouth is to stop work and clean the blockage point. Due to the high density of frozen coal, not only the workload is increased, but it is also time-consuming and labor-intensive, and the crushing effect is not very ideal. This treatment method cannot fundamentally improve the coal unloading efficiency, thus affecting the working efficiency of the coal railway system.

[0004] The existing cleaning crusher will affect the cleaning effect of frozen coal when encountering complex frozen coal conditions. For example, when the equipment encounters a large pile of frozen coal, it will vibrate severely, make loud noises, and have poor balance, which ultimately leads to poor reliability, high downtime and maintenance rates, and low efficiency in cleaning frozen coal. Especially in winter, the cleaning crusher may slip, and even get stuck or climb up due to the large pile of frozen coal.

[0005] Most common cleaning grate crushers are large in size and occupy a large space. They cannot be installed under the hopper bin of a car tipper and are not special cleaning grate devices for the hopper bin of a car tipper. In order to solve the problems of the crusher getting stuck or climbing up due to the large frozen coal pile, severe equipment shaking, loud noise and poor reliability, a frozen coal cleaning device for the hopper bin of a car tipper was developed. The cleaning device is installed under the car tipper to cooperate with the coal unloading process of the car tipper and perform subsequent coal block screening. Summary of the invention

[0006] In view of the problem that frozen coal blocks cannot fall into the coal bin at the mesh grate opening and cause blockage, the present invention provides a frozen coal cleaning device for the grate of the hopper bin of a tipping machine, which can clean up large-volume frozen coal piles or frozen coal blocks, and has an ideal grate cleaning effect. The device drives the traction bracket to move up and down through the extension and contraction of the hydraulic cylinder in the flexible mobile shovel unit, thereby driving the mobile shovel connected to the shock absorber to work, and shovels out the frozen coal blocks stuck in the mesh grate opening. At the same time, the driving trolley assembly is used to drive the mobile shovel to shovel the larger frozen coal blocks to the elastic crushing unit for crushing. The shock absorber can eliminate and reduce the vibration force transmitted to the flexible mobile shovel unit during the coal shoveling process and the vibration transmitted from the flexible mobile shovel unit to the mobile shovel. By using a shock-absorbing support in the elastic crushing unit and adding a seismic isolation layer, most of the energy generated by the crusher when working can be offset, thereby playing a shock-absorbing role, better protecting the equipment body structure, and improving the working efficiency of the tipping machine.

[0007] The present invention provides a frozen coal cleaning device for a dumper hopper grate, which is characterized by comprising steel rails, a flexible movable shovel unit and an elastic crushing unit, wherein the steel rails are symmetrically arranged on the left and right sides of the grate, the elastic crushing unit is installed at the front end of the grate, and the flexible movable shovel unit slidably installed on the steel rails is provided at the rear end of the grate.

[0008] Moreover, the flexible mobile shovel unit includes a driving trolley assembly and a retractable assembly located between the two driving trolley assemblies, the driving trolley assembly includes a cleaning shovel, a cover plate, a driving chassis, a hydraulic motor, a driving wheel and a slider, the driving chassis is installed inside the cover plate, a slider is installed in the middle of the driving chassis, and driving wheels are installed on the driving chassis on the front and rear sides of the slider, the driving wheels are driven by a hydraulic motor, an opening is provided on the inner side of the top of the cover plate, the two ends of the body pass through the opening and are connected to the tops of the sliders on both sides, and the cleaning shovel is installed at the front end of the cover plate;

[0009] The retractable assembly includes a main body, a hydraulic cylinder, a traction bracket, a mobile shovel shock absorber and a mobile shovel. The main body and the traction bracket are respectively installed between the left and right sliders. The traction bracket is driven to rise and fall by a hydraulic cylinder installed on the main body. The mobile shovels are evenly spaced at intervals on the bottom of the main body. The mobile shovel is hingedly installed with the main body, and a mobile shovel shock absorber connected to the traction bracket is installed on the mobile shovel.

[0010] Moreover, a rail groove for sliding on the rail is provided on one side of the bottom of the slider, an M-shaped groove is provided in the middle of the bottom surface of the slider, a supporting groove is provided on the top of the slider, a vertical groove is provided on the inner side of the slider, the bottom surface of the body is installed in the supporting groove, the middle part of the driving chassis is connected to the M-shaped groove, and a traction bracket is slidably installed in the vertical groove.

[0011] Moreover, a top U-shaped fork is provided on the top of the mobile shovel, a middle U-shaped fork is provided in the middle of the mobile shovel, the top U-shaped fork of the mobile shovel is hinged on the main body, the middle U-shaped fork of the mobile shovel is connected to one end of the shock absorber, and the other end of the shock absorber is connected to the traction bracket.

[0012] Moreover, the elastic crushing unit includes a shock-absorbing support, a bearing seat, a movable roller, a small-headed hammer, a coupling, a motor, a reducer, a reducer shock-absorbing support, a limit block and a large-headed hammer. The shock-absorbing support and the reducer shock-absorbing support are respectively installed on the two rails, the bearing seat is installed on the shock-absorbing support, and the reducer driven by the motor is installed on the reducer shock-absorbing support. The output shaft of the reducer is connected to one end of the movable roller through a coupling, and the other end of the movable roller is connected to the bearing seat. A small-headed hammer and a large-headed hammer are respectively installed on the roller body of the movable roller.

[0013] Moreover, the elastic crushing unit also includes a protective cover assembly, which includes a top inclined plate, a side steel plate, a rear steel plate, a rear impact iron block and a side impact plate. Side steel plates are arranged on the outer sides of the two steel rails, side impact plates are arranged on the inner sides of the side steel plates, rear steel plates are arranged at the rear of the two side steel plates, a rear impact iron block is arranged on the rear steel plate, and the top ends of the two side steel plates are covered with a top inclined plate.

[0014] Moreover, the shock absorber includes a left end pull ring, a shock absorber spring, a damper and a right end pull ring. The damper is installed inside the shock absorber spring, and the two ends of the damper are respectively connected to the left end pull ring and the right end pull ring arranged outside the shock absorber spring.

[0015] Moreover, the shock-absorbing support includes an upper pressure plate, a shock-absorbing spring and a fixed support. The upper pressure plate and the fixed support are slidably connected in the longitudinal direction, and a shock-absorbing spring is arranged between the upper pressure plate and the fixed support.

[0016] Moreover, the small-head hammers and large-head hammers are arranged in rows and at intervals on the moving roller.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention removes the frozen coal blocks stuck in the mesh grate opening by a mobile shovel, and flattens the frozen coal accumulated on the mesh grate, thereby avoiding the phenomenon of climbing or stopping when encountering a large accumulation of frozen coal, and shovels the larger frozen coal blocks to the elastic crushing unit for crushing.

[0019] 2. The mobile shovel shock absorber of the present invention eliminates and reduces the vibration force transmitted to the flexible mobile shovel unit during the coal shoveling process or the vibration transmitted from the flexible mobile shovel unit to the mobile shovel, increases the freedom of movement of the mobile shovel, effectively avoids the mobile shovel from getting stuck, stabilizes the center of gravity of the flexible mobile shovel unit, and makes the flexible mobile shovel unit run more smoothly and efficiently during the working process, avoiding the occurrence of equipment climbing or shutdown failures.

[0020] 3. When the flexible mobile shovel unit of the present invention encounters a pile of frozen coal, when the excitation frequency is lower than the natural frequency of the mobile shovel shock absorber, the mobile shovel shock absorber does not play a vibration isolation role, but plays a supporting role for the mobile shovel, assisting the mobile shovel to shovel and clean the frozen coal, and the mobile shovel shock absorber assists the mobile shovel to shovel the frozen coal; when the frozen coal pile is too large and the mobile shovel cannot shovel or shovel it away, the spring in the mobile shovel shock absorber will be compressed, allowing the mobile shovel to pass through the frozen coal pile that cannot be cleaned, reducing the shaking of the equipment when it cannot pass through obstacles, obtaining a good vibration isolation effect, and reducing the problem of crusher shutdown or climbing.

[0021] 4. The shock-absorbing support of the elastic crushing unit in the present invention offsets most of the energy generated by the crusher when it is working, plays a shock-absorbing role, better protects the equipment and extends the service life of the equipment; the slider is the medium connecting the driving trolley assembly, the rail and the flexible mobile shovel unit, which greatly reduces the number of parts of the whole machine.

[0022] 5. The flexible mobile shovel unit in the present invention has a small vertical volume. When the dumper dumps the coal pile into the hopper bin, there will be almost no frozen coal left on the upper part. The dumper will not be affected when unloading the car, and can operate continuously, which can greatly improve the working efficiency of the dumper.

[0023] 6. In the present invention, the small-head hammers and the large-head hammers on the movable roller are arranged alternately to form a mixed hammer head, which can crush frozen coal blocks of different sizes, thereby improving the crushing efficiency and reducing energy consumption.

[0024] 7. The driving trolley assembly in the present invention is driven by a hydraulic motor, which has high power density, strong power, directly drives the roller, and has fast power response; the roller makes the driving trolley assembly more stable during operation and the force on the rail is more balanced; the overall structure of the driving trolley assembly is compact, and under the action of the groove at the bottom of the slider, it cooperates with the rail to limit its vertical freedom, effectively avoiding the problem of the flexible mobile shovel unit stopping or climbing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the flexible mobile shovel unit of the present invention;

[0027] Figure 3a for Figure 2 AA section view;

[0028] Figure 3b It is an axonometric view of the drive trolley assembly of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the driving trolley assembly of the present invention in which the slider is omitted;

[0030] Figure 5 It is a structural schematic diagram of the elastic crushing unit of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the mobile shovel of the present invention;

[0032] Figure 7 It is a schematic diagram of the structure of the shock-absorbing support of the present invention;

[0033] Figure 8 It is a structural schematic diagram of the shock absorber of the mobile shovel of the present invention;

[0034] Fig. 9 It is a structural schematic diagram of the slider of the present invention;

[0035] Fig.10 It is a schematic structural diagram of the protective cover assembly of the present invention.

[0036] Description of reference numerals:

[0037] Flexible mobile shovel unit 1, driving trolley assembly 101, cleaning shovel 1011, cover plate 1012, body 1013, driving chassis 1014, driving wheel 1015, slider 1016, rail groove 10161, M-shaped groove 10162, support groove 10163, vertical groove 10164, bolt hole 10165, retracting assembly 102, hydraulic cylinder 1021, traction bracket 1022, hydraulic motor 1023, mobile shovel shock absorber 1024, left end pull ring 10241, shock absorbing spring 10242, damper 10243, right end pull ring 10244, mobile Shovel 1025, top U-shaped fork 10251, middle U-shaped fork 10252, elastic crushing unit 2, shock-absorbing support 201, upper pressure plate 2011, shock-absorbing spring 2012, fixed support 2013, bearing seat 202, movable roller 203, small head hammer 204, hammer head frame 205, coupling 206, motor 207, reducer 208, reducer shock-absorbing support 209, limit block 210, big head hammer 211, mesh screen 3, protective cover assembly 4, top inclined plate 401, side steel plate 402, rear side steel plate 403, rear impact iron block 404, side impact plate 405, rail 5. DETAILED DESCRIPTION

[0038] In order to fully describe the technical content, structural features, objectives and effects of the present invention, the following will be described in detail with reference to the accompanying drawings.

[0039] The frozen coal cleaning equipment for the dumper hopper is specially used under the dumper hopper and is used in conjunction with the dumper. The cleaning equipment is small in size and is arranged under the coal unloading system, above the coal bunker or conveyor belt to complete the crushing of frozen coal blocks. Figure 1 As shown, it includes a flexible mobile shovel unit 1, an elastic crushing unit 2, a mesh grate 3, a protective cover assembly 4 and a rail 5. The elastic crushing unit 2 is located inside the protective cover assembly 4, and the rail 5 is symmetrically installed on both sides of the mesh grate 3. The flexible mobile shovel unit 1 and the elastic crushing unit 2 are respectively connected to the first mounting end and the second mounting end of the rail 5, and the mesh grate 3 is installed at the bottom of the rail 5.

[0040] Flexible mobile shovel unit 1, such as Figure 2 As shown, it includes a driving trolley assembly 101 and a retractable assembly 102 . Specifically, there are two driving trolley assemblies 101 , which are symmetrically distributed on both sides of the retractable assembly 102 .

[0041] Drive trolley assembly 101, such as Figure 3a-Figure 3b As shown, it includes a cleaning shovel 1011, a cover plate 1012, a body 1013, a driving chassis 1014, a hydraulic motor 1023, a driving wheel 1015 and a slider 1016. The cover plate 1012 can resist the falling coal blocks. The cleaning shovel 1011 is located on the inner side of the connecting rail 5 and is used to clean the coal slag remaining on the rail 5 and shovel the coal slag into the middle of the mesh 3 to ensure that the driving trolley assembly 101 slides smoothly on the rail 5. Figure 8 As shown, a rail groove 10161 is provided on one side of the bottom of the slider 1016, and the rail groove 10161 retains the freedom of the slider 1016 in the front and rear directions. The slider 1016 will not move in the vertical direction. This structure can make the entire flexible mobile shovel unit 1 more stable when encountering a large coal pile during the forward movement, and will not shake violently, which can overcome the problem that the existing equipment encounters a large frozen coal pile or frozen coal block and causes the equipment to climb up; an M-shaped groove 10162 is provided at the bottom of the slider 1016, and a supporting groove 10163 is provided at the top of the slider 1016. Bolt holes 10165 are respectively provided on both sides of the supporting groove 10163, and bolts are used to fix the body 1013 and the slider 1016; a vertical groove 10164 is provided on one side of the slider 1016.

[0042] The cleaning shovel 1011 is located in front of the driving chassis 1014, the front end of the cover plate 1012 is connected to the cleaning shovel 1011, the inner side of the cover plate 1012 is provided with an opening for inserting the main body 1013, the bottom of the main body 1013 is connected to the support groove 10163, and the contact surface is reinforced with angle steel, the driving chassis 1014 is located inside the cover plate 1012, the middle part of the driving chassis 1014 is connected to the M-shaped groove 10162, the driving wheels 1015 are symmetrically installed at both ends of the driving chassis 1014, the output end of the hydraulic motor 1023 is connected to the driving end of the driving wheel 1015, the hydraulic motor 1023 is located on the outside of the driving trolley assembly 101, and the hydraulic station provides power for the hydraulic motor 1023 to drive the driving chassis 1014 to prevent the machine from overtravel and derailment; the rail groove 10161 is connected to the rail 5.

[0043] The retracting assembly 102 includes a hydraulic cylinder 1021, a traction bracket 1022, a mobile shovel shock absorber 1024 and a mobile shovel 1025. The traction bracket 1022 can make the mobile shovel 1025 more accurate and efficient when being retracted and released through the mobile shovel shock absorber 1024, which can make the structure of the entire retracting assembly 102 more compact and the center of gravity more stable, and can also assist the mobile shovel 1025 in accurate and efficient retraction. The mobile shovel shock absorber 1024, on the one hand, increases the degree of freedom of the mobile shovel 1025, effectively preventing the mobile shovel 1025 from getting stuck, and on the other hand, reduces the vibration of the flexible mobile shovel unit 1, stabilizes the center of gravity of the flexible mobile shovel unit 1, and makes the flexible mobile shovel unit 1 run more smoothly and efficiently.

[0044] like Figure 5 As shown, a top U-shaped fork 10251 is provided on the top of the mobile shovel 1025, a middle U-shaped fork 10252 is provided in the middle of the mobile shovel 1025, both ends of the traction bracket 1022 are connected to the vertical groove 10164, the top U-shaped fork 10251 of the mobile shovel 1025 is connected to the bottom of the body 1013 through a pin, the middle U-shaped fork 10252 of the mobile shovel 1025 is connected to one end of the mobile shovel shock absorber 1024 through a pin, and the other end of the mobile shovel shock absorber 1024 is connected to the mobile shovel through the pin. The traction bracket 1022 is connected, and the traction bracket 1022 is driven to rise and fall by a hydraulic cylinder 1021 installed on the main body 1013. The left and right ends of the traction bracket 1022 cooperate with the vertical groove 10164 of the slider 1016. The extension and retraction of the cylinder rod of the hydraulic cylinder 1021 drives the mobile shovel 1025 to complete the retraction and extension action. After the hydraulic cylinder 1021 is started, its cylinder rod will drive the traction bracket 1022 to move, and the mobile shovel 1025 will be lifted up through the mobile shovel shock absorber 1024 to complete the retracting process of the mobile shovel 1025.

[0045] Elastic crushing unit 2, such as Figure 4As shown, it includes a shock-absorbing support 201, a bearing seat 202, a movable roller 203, a small hammer 204, a hammer head frame 205, a coupling 206, a motor 207, a reducer 208, a reducer shock-absorbing support 209, a limit block 210 and a large hammer 211. The reducer shock-absorbing support 209 and the shock-absorbing support 201 are respectively used to add a seismic isolation layer between the reducer 208 and the rail 5 and between the bearing seat 202 and the rail 5. The seismic isolation layer serves as a soft connection with the rail 5, which can offset most of the energy generated by the crusher when it is working, thereby playing a shock-absorbing role, better protecting the equipment body 1013 structure, and extending the service life of the equipment. The power of the elastic crushing unit 2 is provided by the motor 207 and the reducer 208.

[0046] The shock-absorbing support 201 is located below the bearing seat 202, the reducer shock absorber 209 is located below the reducer 208, the shock-absorbing support 201 and the reducer shock-absorbing support 209 are respectively installed on the rails 5 located on both sides of the mesh 3, the upper end of the reducer shock-absorbing support 209 is connected to the housing of the reducer 208, the output shaft of the motor 207 is driven and connected to one end of the movable roller 203 through the reducer 208 and the coupling 206 in turn, the other end of the movable roller 203 is installed on the shock-absorbing support 201 through the bearing seat 202, the roller body of the movable roller 203 is respectively connected to the small head hammer 204 and the large head hammer 211 through the hammer head frame 205, the limit block 210 is connected to the end of the rail 5, the limit block 210 prevents the machine from overtravel and derailment, and ensures the safe operation of the equipment. Preferably, the movable roller 203, the small-head hammer 204, the hammer head frame 205 and the large-head hammer 211 constitute a rotating body assembly, and a hammer head frame is arranged on the roller body of the movable roller 203. Eight rows of small hammer heads 204 and six rows of large hammer heads 211 are installed on the movable roller through the hammer head frame to form a mixed hammer head. The small-head hammers 204 arranged in rows and the large-head hammers 211 arranged in rows are arranged alternately.

[0047] The protective cover assembly 4 is composed of steel plates and is installed above the working area of ​​the movable roller 203 in the elastic crushing unit 2 to prevent the broken coal blocks from splashing and fully cover the working area. Fig. 9 As shown, it includes a top inclined plate 401, a side steel plate 402, a rear steel plate 403, a rear impact iron block 404 and a side impact plate 405. The top inclined plate 401 of the protective cover assembly 4 slides the frozen coal pile in the dumper to the mesh grate 3 area, the side impact plate 405 blocks the splashing frozen coal blocks, and the rear impact iron block 404 performs secondary crushing on the coal blocks ejected from the crusher, so that its size is more consistent with the size of the mesh grate holes in the mesh grate 3 and leaks smoothly. Side steel plates 402 are arranged on the outside of the two steel rails 5, side impact plates 405 are arranged on the inner side of each side steel plate 402, a rear steel plate 403 is arranged at the rear between the two side steel plates 402, a rear impact iron block 404 is arranged on the inner surface of the rear steel plate 403, and a top inclined plate 401 is arranged on the top of the two side steel plates 402.

[0048] In a preferred embodiment of the present invention, the mobile shovel shock absorber 1024, such as Figure 7 As shown, it includes a left-end pull ring 10241, a shock-absorbing spring 10242, a damper 10243 and a right-end pull ring 10244. The shock-absorbing spring 10242 is located outside the damper 10243. The two ends of the damper 10243 are respectively connected to the inner end of the left-end pull ring 10241 and the inner end of the right-end pull ring 10244. The outer end of the left-end pull ring 10241 is connected to the middle U-shaped fork 10252 of the moving shovel 1025, and the outer end of the right-end pull ring 10244 is connected to the traction bracket 1022.

[0049] In a preferred embodiment of the present invention, the shock absorbing support 201, such as Figure 6 As shown, it includes an upper pressure plate 2011, a shock-absorbing spring 2012 and a fixed support 2013. The fixed support 2013 plays an overall supporting role to prevent the shock-absorbing spring 2012 from being crushed, and also plays a limiting role. The two ends of the shock-absorbing spring 2012 are respectively connected to the upper pressure plate 2011 and the mounting ends of the fixed support 2013, and the sliding end of the upper pressure plate 2011 is connected to the sliding end of the fixed support 2013.

[0050] Specifically, the hydraulic station is installed behind the starting position of the flexible mobile shovel unit 1, and the power of the hydraulic cylinder 1021 and the hydraulic motor 1023 in the flexible mobile shovel unit 1 is provided by the hydraulic station.

[0051] Compared with traditional equipment, this device uses multiple processes to completely crush the huge frozen coal piles or frozen coal blocks, and the cleaning effect is ideal; the structure adopts flexible mobile shovel units and elastic crusher components to adapt to complex and changeable working conditions, and solve the problem of frozen coal blocks not being able to fall into the coal bunker at the grate opening and causing blockage. This device has strong passability and high stability, effectively avoiding the problem of the device climbing up when encountering large frozen coal piles, and assisting the dumper system to work efficiently to meet the needs of safe and efficient coal transportation.

[0052] The following is a further description of a frozen coal cleaning device for a dumper hopper bin grate according to the present invention in conjunction with an embodiment:

[0053] The specific working process of the frozen coal cleaning device for the dumper hopper grate of the present invention is as follows:

[0054] First, the coal carriage pours coal into the hopper under the action of the dumper, and the frozen coal falls onto the mesh grate 3 through the hopper. Then the flexible mobile shovel unit 1 is started, and the flexible mobile shovel unit 1 first flattens the frozen coal pile accumulated on the mesh grate 3. The broken coal particles and coal blocks with a size smaller than the mesh grate holes will leak out, and the coal blocks with a size greater than or equal to the mesh grate holes will be stuck in the mesh grate holes or accumulated on the mesh grate 3.

[0055] Then, the mobile shovel 1025 in the flexible mobile shovel unit 1 removes the frozen coal blocks stuck in the mesh holes. When encountering a coal block that is too large and stuck in the mesh opening, the mobile shovel shock absorber 1024 connected to the U-shaped fork 10252 in the middle of the mobile shovel 1025 plays a buffering role, effectively avoiding the device of the present invention from getting stuck, and can smoothly pass through obstacles. At the same time, the mobile shovel shock absorber 1024 reduces the vibration of the flexible mobile shovel unit 1, stabilizes the center of gravity of the flexible mobile shovel unit 1, and makes the flexible mobile shovel unit 1 run more smoothly and efficiently;

[0056] For frozen coal blocks that are too large in size, the mobile shovel 1025, driven by the driving trolley components 101 symmetrically distributed on both sides of the retractable component 102 and assisted by the cleaning shovel 1011, moves the frozen coal blocks that are too large in size to the working area of ​​the elastic crushing unit 2. At the same time, in order to prevent the machine from overtravel and derailment, in addition to the stroke control, limit blocks 210 are respectively provided at both ends of the rail 5 to prevent exceeding the range, so as to ensure the safe operation of the equipment;

[0057] After the flexible mobile shovel unit 1 completes the corresponding work, the mobile shovel 1025 is retracted under the action of the hydraulic cylinder 1021 connected to the traction bracket 1022, and the hydraulic motor 1023 drives the driving wheel 1015 in the driving trolley assembly 101 to move, and the flexible mobile shovel unit 1 quickly returns, greatly improving the screening efficiency of the coal grate;

[0058] Finally, the elastic crushing unit 2 is started, and the elastic crushing unit 2 crushes the frozen coal blocks that are too large in volume shoveled by the mobile shovel 1025. Since the frozen coal blocks are of different sizes and have large volume differences, the crushing conditions are complex and changeable. The small-head hammers 204 and the large-head hammers 211 alternately distributed in double rows on the movable roller 203 can efficiently crush the frozen coal blocks that are too large. Since there is a large vibration during the crushing process, the reducer shock-absorbing support 209 under the reducer 208 and the shock-absorbing support 201 under the bearing seat 202 can effectively reduce the vibration, which not only prevents the parts of the device of the present invention from loosening and being damaged, but also can reduce the noise to a certain extent, so that the size of the frozen coal blocks that are too large is smaller than the mesh holes, so that they can leak to the bottom of the mesh 3.

[0059] The process flow of the device of the present invention is different from that of the traditional crusher. It adopts multiple processes for crushing, and the frozen coal blocks dumped on the grate 3 by the dumper are completely crushed, which greatly reduces the workload of the equipment and achieves the purpose of efficiently crushing the frozen coal.

[0060] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A frozen coal cleaning device for a dumper hopper grate, characterized in that: It includes steel rails, a flexible mobile shovel unit and an elastic crushing unit. The steel rails are symmetrically arranged on the left and right sides of the grate, the elastic crushing unit is installed at the front end of the grate, and the flexible mobile shovel unit is slidably installed on the steel rails at the rear end of the grate. The flexible mobile shovel unit includes a driving trolley assembly and a retractable assembly located between the two driving trolley assemblies. The driving trolley assembly includes a cleaning shovel, a cover plate, a driving chassis, a hydraulic motor, a driving wheel and a slider. The driving chassis is installed inside the cover plate, a slider is installed in the middle of the driving chassis, and driving wheels are installed on the driving chassis on both sides of the slider. The driving wheels are driven by a hydraulic motor. An opening is provided on the inner side of the top of the cover plate, and the cleaning shovel is installed at the front end of the cover plate. The retractable assembly comprises a body, a hydraulic cylinder, a traction bracket, a mobile shovel shock absorber and a mobile shovel. The body and the traction bracket are respectively installed between the left and right sliders. The traction bracket is driven to rise and fall by the hydraulic cylinder installed on the body. The mobile shovels are evenly spaced at intervals at the bottom of the body. The mobile shovels are hingedly installed with the body. The mobile shovel shock absorber connected to the traction bracket is installed on the mobile shovel. The two ends of the body pass through the opening and are connected to the tops of the sliders on both sides. A rail groove for sliding on the rail is provided on one side of the bottom of the slider, an M-shaped groove is provided in the middle of the bottom surface of the slider, a supporting groove is provided on the top of the slider, a vertical groove is provided on the inner side of the slider, the bottom surface of the body is installed in the supporting groove, the middle part of the driving chassis is connected to the M-shaped groove, and a traction bracket is slidably installed in the vertical groove; The elastic crushing unit includes a shock-absorbing support, a bearing seat, a movable roller, a small-headed hammer, a coupling, a motor, a reducer, a reducer shock-absorbing support, a limit block and a large-headed hammer. The shock-absorbing support and the reducer shock-absorbing support are respectively installed on the two rails, the bearing seat is installed on the shock-absorbing support, and the reducer driven by the motor is installed on the reducer shock-absorbing support. The output shaft of the reducer is connected to one end of the movable roller through a coupling, and the other end of the movable roller is connected to the bearing seat. A small-headed hammer and a large-headed hammer are respectively installed on the roller body of the movable roller.

2. The frozen coal cleaning device for the hopper grate of a dumper according to claim 1, characterized in that: The mobile shovel is provided with a top U-shaped fork at the top, and a middle U-shaped fork is provided at the middle of the mobile shovel. The top U-shaped fork of the mobile shovel is hinged on the body, the middle U-shaped fork of the mobile shovel is connected to one end of the shock absorber, and the other end of the shock absorber is connected to the traction bracket.

3. The frozen coal cleaning device for the hopper grate of a dumper according to claim 1, characterized in that: The elastic crushing unit also includes a protective cover assembly, which includes a top inclined plate, side steel plates, a rear steel plate, a rear impact iron block and a side impact plate. Side steel plates are arranged on the outer sides of the steel rails on both sides, side impact plates are arranged on the inner sides of the side steel plates, rear steel plates are arranged at the rear of the two side steel plates, a rear impact iron block is arranged on the rear steel plate, and the top ends of the two side steel plates are covered with a top inclined plate.

4. The frozen coal cleaning device for the hopper grate of a dumper according to claim 2, characterized in that: The shock absorber comprises a left pull ring, a shock absorber spring, a damper and a right pull ring. The damper is installed inside the shock absorber spring, and the two ends of the damper are respectively connected to the left pull ring and the right pull ring arranged outside the shock absorber spring.

5. The frozen coal cleaning device for the hopper grate of a dumper according to claim 1, characterized in that: The shock-absorbing support comprises an upper pressing plate, a shock-absorbing spring and a fixed support. The upper pressing plate and the fixed support are slidably connected in the longitudinal direction, and a shock-absorbing spring is arranged between the upper pressing plate and the fixed support.

6. The frozen coal cleaning device for the hopper grate of a dumper according to claim 1, characterized in that: The small head hammers and large head hammers are arranged in rows and at intervals on the moving roller.

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