Coal screening equipment

Abstract

The embodiment of the invention provides coal screening equipment, and relates to the technical field of coal screening equipment. The coal screening equipment comprises a screening main body part, a dust collecting part, a water spraying and cleaning part and a water stain dispersing and draining part. The screening body part comprises a machine box, a rolling shaft and a motor, the rolling shaft is rotationally arranged in the machine box, the motor is installed on the outer side of the machine box to drive the rolling shaft to rotate, and a feeding hopper is arranged at the front end of the upper portion of the machine box. And the dust collecting part comprises a collecting tank, a dust hood and a fan. And high-pressure thin water columns sprayed out of the high-pressure spray head also fall into the case after impacting the impeller part, so that a certain wetting effect on the surface of the coal is achieved, and dust on the surface of the coal is prevented from being diffused into air. The water source falling on the surface is more dispersedly and centrifugally rotated into the dust hood by the rotating blade plate and falls into the case, so that the water source which impacts the impeller part falls and splashes more and more uniformly falls on the coal transported above the rolling shaft to further reduce the dust.

Description

Technical Field

[0001] The present application relates to the technical field of coal screening equipment, and in particular to a coal screening equipment. Background Art

[0002] Compared with vibrating screen equipment, roller screen equipment does not need to vibrate the screened materials during screening operations. Roller screen is more suitable for screening fragile materials such as coal.

[0003] When dry coal is screened using a roller screen, the dust in the coal is easily spread to the outside of the equipment when the rolling rollers screen the coal. Since the operator is located near the roller screen equipment, the spread dust will cause harm to the operator's body. The dust generated by the roller screen when screening coal needs to be cleaned in time to better protect the operator's health. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a coal screening device to solve the problem that when the roller screen is screening coal, the dust in the coal is easily diffused to the outside of the device, and the diffused dust will cause harm to the operator's body.

[0005] A coal screening device according to an embodiment of the present application includes: a screening body part, a dust collecting part, a water spray cleaning part and a water stain dispersion and drainage part.

[0006] The screening main body includes a chassis, a roller and a motor. The roller is rotatably arranged inside the chassis. The motor is installed outside the chassis to drive the roller to rotate. A hopper is arranged at the front end above the chassis. The dust collection part includes a collection tank, a dust hood and a fan. The dust hood is arranged above the chassis. The fan is installed on the top of the dust hood, and the fan dust removal port is connected to the collection tank through a ventilation pipe. A grid is fixed inside the dust hood. The water spray cleaning part includes a water spray pressurizing assembly and a high-pressure nozzle. The high-pressure nozzle is installed inside the dust hood. The water spray pressurizing assembly is installed on the chassis to pressurize water to the high-pressure nozzle. The water stain dispersion and drainage part includes a shaft, an impeller part and a blade. The shaft is rotatably arranged with the grid. The impeller part and the blade are fixedly sleeved on the outside of the shaft from top to bottom. The three groups of blades are located on the outside of the shaft and are tilted in a ring array.

[0007] The dry coal is loaded from the upper hopper to the top of the roller inside the chassis. The motor drives the roller to rotate, and multiple groups of rollers are set at an angle. The rotating multiple groups of rollers screen the coal transported from above. That is, large pieces of coal fall from the outlet along the rollers, and small pieces of coal fall from the gaps between adjacent rollers to the bottom of the chassis for discharge. When the coal is screened above the rollers, the running fan puts the inside of the dust hood in a negative pressure state. The dust hood absorbs the dust generated in the coal during the screening process inside the chassis. Finally, the dust will enter the collection tank through the ventilation pipe and be collected, which can reduce the dust from the chassis to the outside and has a good protective effect on the personnel around the equipment. The water spray pressurization component in the water spray cleaning part supplies water to the inside of the high-pressure nozzle. The high-pressure fine water source sprayed from the high-pressure nozzle impacts the impeller part, causing the impeller part to rotate around the shaft. At the same time, the high-pressure fine water column sprayed from the high-pressure nozzle will also fall into the inside of the chassis after impacting the impeller part, which has a certain wetting effect on the surface of the coal, preventing the dust on the surface of the coal from spreading into the air, and playing a role in curbing the spread of dust from the source of the coal. When the impeller part drives the shaft to rotate, the rotating shaft will drive the three sets of inclined blades to rotate synchronously. The length of the blade should be longer than the diameter of the impeller part. The water source that impacts the impeller part will fall on the top of the blade, and the rotating blade will make the water source that falls on the surface more dispersedly centrifugally fly into the dust hood and fall into the inside of the chassis, so that the water source that impacts the impeller part falls and splashes more and more evenly on the coal transported above the roller, and the water source after the impact can be better utilized. When the blade is driven to rotate, it can also generate a certain upward air flow, and cooperate with the original fan for secondary pressurization, so that the dust inside the chassis can be more efficiently sucked into the dust hood.

[0008] In some embodiments of the present application, the water spray pressurizing assembly includes a water pump and a connecting pipe, one end of the connecting pipe is connected to the water outlet port of the water pump, and the high-pressure nozzle is connected to the connecting pipe. The water pump draws water from an external source and pressurizes it, and the pressurized water source is finally sprayed out from the high-pressure nozzle through the connecting pipe.

[0009] In some embodiments of the present application, the water spray pressurizing assembly further includes a bottom plate, the bottom plate is fixed to the outside of the chassis, and the water pump is installed above the bottom plate.

[0010] In some embodiments of the present application, the water stain dispersion and drainage part also includes a support, the support is arranged on the grid, and the bottom end of the shaft is rotatably connected to the support.

[0011] In some embodiments of the present application, the water stain dispersion and drainage part also includes a limiting cover, and the limiting cover is fixedly arranged on the top end of the shaft.

[0012] In some embodiments of the present application, a fixing plate is provided outside the chassis, and the motor is installed at the bottom of the fixing plate.

[0013] In some embodiments of the present application, a plurality of groups of rollers are arranged obliquely downward inside the chassis, and each motor drives one of the rollers to rotate.

[0014] In some embodiments of the present application, the outside of the roller is provided with an annular structure and an axially positioned groove.

[0015] In some embodiments of the present application, the screened main body portion also includes a blanking plate, and the blanking plate is arranged at the rear end of the chassis.

[0016] In some embodiments of the present application, the chassis includes a box body and a base frame, the base frame is fixedly arranged at the bottom of the box body, and the screening main body part also includes a reinforcement beam, and the reinforcement beam is fixedly arranged inside the chassis to support the box body.

[0017] In some embodiments of the present application, the impeller portion includes a base, a sleeve, an impeller blade and an outer ring plate, the sleeve is fixedly mounted on the outside of the shaft rod, the base is fixedly mounted on the outside of the sleeve, a plurality of impeller blades are arranged in a ring array above the base, and the impeller blades are an arc-shaped structure, the outer ring plate is fixedly mounted on the periphery of the base, the base is arranged to be gradually inclined downward from the inside to the outside along the radial position of the shaft rod, the impeller blade is provided with a through hole near the bottom of the radial end of the shaft rod, a water outlet groove is provided on the base above the impeller blade, and the water outlet groove is located between two adjacent impeller blades.

[0018] The high-pressure water column sprayed from the high-pressure nozzle impacts the inner arc wall of the arc-shaped impeller blade above the base, and the water source falling between the impeller blades will fall on the inner side of the outer ring plate along the inclined base. The water source between adjacent impeller blades will gradually flow into the water outlet slot through the impeller blades at the end and fall on the top of the impeller. Since the impeller and the impeller part rotate synchronously, the impeller outside the shaft is always located below the water outlet slot, that is, three sets of water outlet slots are also opened above the base. The water source flowing into the water outlet slot will fall on the surface of the impeller, and the rotating impeller will quickly disperse the collected water source into the dust cover, so that the water source impacting the impeller blade in the impeller part can be collected more, and finally the water will be dispersed into water droplets by the rotating impeller and fall evenly on the coal block above the roller, which improves the dispersion utilization rate of the water source, and further disperses the impact water source more and more evenly on the coal surface, which can better reduce the dust generated when screening coal. When the fine water column sprayed by the high-pressure nozzle impacts the inner arc surface of the arc-shaped impeller blade, the arc-shaped impeller blade plays a certain role in guiding and buffering, which can reduce the splashing and diffusion of water stains impacting the impeller blade, that is, it can guide more water sources impacting the impeller blade to be collected and fall on the impeller blade. The height of the outer ring plate is lower than the height of the water column sprayed by the high-pressure nozzle, so as to avoid the outer ring plate blocking the water column sprayed by the high-pressure nozzle, and at the same time ensure that the outer ring plate surrounds the outside of the base to block the water source that is diffused outward due to centrifugal force.

[0019] The coal screening equipment also includes an airflow blocking part, which includes a beam plate, a flexible strip, a fixing bolt and an L-shaped limit card plate. A mounting groove is provided at the bottom of the beam plate, and a plurality of the flexible strips are adjacently arranged inside the chassis, and the top end of the flexible strip is inserted into the mounting groove. The limit card plate is arranged on one side of the flexible strip, and the fixing bolt connects the beam plate, the flexible strip and the limit card plate.

[0020] The rollers transport and screen the coal at the same time, and a certain amount of dust will be generated during the screening process. When the dust hood in the dust collection part absorbs the dust brought by the coal above the rollers inside the chassis, the multiple flexible strips in the airflow blocking part block the space between the dust hood and the side of the chassis. At this time, a large amount of air will flow into the chassis from the small coal discharge port at the bottom of the chassis, and the inflowing air will enter the dust hood together with the dust inside the chassis, and will eventually be absorbed by the collection tank. This design can not only effectively reduce the dust from the inside of the chassis to the outside, but also cause more dust inside the chassis to be sucked in and collected by the dust collection part. A plurality of flexible strips are arranged at the bottom of the beam slab. The flexible strips can be made of thin rubber belts with good flexibility, and the thickness of the flexible strips is preferably less than 2 mm. When the bottom of the flexible strip contacts the coal transported above the roller, the moving coal can also push the bottom of the corresponding flexible strip to move, so that the large piece of coal above the roller can be transported smoothly. At the same time, multiple sets of flexible strips can better block the open space between the dust hood and the chassis, further improving the dust removal efficiency. The top of the flexible strip is fixed to the installation slot by fixing bolts, and the limit card plays a stabilizing and limiting role. When a flexible strip is damaged, the corresponding flexible strip can be removed for replacement, saving the use of materials.

[0021] The beneficial effects of the present application are as follows: the present application obtains a coal screening device through the above-mentioned design, the dust hood will absorb the dust generated in the coal during the screening process inside the chassis, and the dust will eventually enter the collection tank through the ventilation pipe and be collected, which can reduce the dust from the chassis to the outside, and has a good protective effect on the personnel around the equipment. The high-pressure fine water column sprayed from the high-pressure nozzle will also fall into the inside of the chassis after impacting the impeller part, which has a certain wetting effect on the surface of the coal, preventing the dust on the surface of the coal from spreading into the air, and playing a role in curbing the spread of dust from the source of the coal. The rotating shaft will drive the three groups of inclined blades to rotate synchronously, and the rotating blades will make the water source falling on the surface more dispersedly centrifugally fly into the dust hood and fall into the inside of the chassis, so that the water source after impacting the impeller part falls and splashes more and more evenly falls on the coal transported above the roller to further reduce the dust.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic structural diagram of a coal screening device according to an embodiment of the present application; Figure 2 is a schematic diagram of the structure of the screening main body according to an embodiment of the present application; Figure 3 It is a schematic diagram of the structure of the dust collection part and the airflow blocking part according to an embodiment of the present application; Figure 4 is a schematic diagram of the structure of the interior of the dust hood and the water spray cleaning part according to an embodiment of the present application; Figure 5 is a schematic diagram of the structure of the water stain dispersion and drainage part according to an embodiment of the present application; Figure 6 is a schematic diagram of the structure of an impeller according to an embodiment of the present application; Figure 7 is a schematic diagram of the structure of the airflow blocking part according to an embodiment of the present application; Figure 8 It is a schematic diagram of the flexible strip and the limiting card plate structure according to an embodiment of the present application.

[0025] icon: 10-screening main body; 110-chassis; 120-roller; 130-motor; 140-upper hopper; 150-lower plate; 160-reinforcement beam; 20-dust collection part; 210-collection tank; 220-dust hood; 230-fan; 240-ventilation pipe; 250-grid; 30-water spray cleaning part; 310-water spray pressurization component; 311-bottom plate; 312-water pump; 313-connecting pipe; 320-high Pressure nozzle; 40-water stain dispersion and drainage part; 410-shaft; 420-impeller part; 421-base; 422-sleeve; 423-impeller blade; 424-outer ring plate; 425-water outlet slot; 426-through hole; 430-blade plate; 440-support; 450-limiting cover; 50-air flow blocking part; 510-beam plate; 520-flexible strip; 530-installation groove; 540-fixing bolt; 550-limiting card plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0027] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] A coal screening device according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0030] See also Figure 1-Figure 8 According to an embodiment of the present application, a coal screening device includes: a screening main body part 10, a dust collecting part 20, a water spray cleaning part 30 and a water stain dispersion and drainage part 40.

[0031] The screening main body 10 is a common roller screen device, which can screen dry coal. The dust collection part 20 cooperates with the water spray cleaning part 30 and the water stain dispersion and drainage part 40 to absorb and clean the dust generated when the screening main body 10 screens coal. At the same time, the water spray cleaning part 30 cooperates with the water stain dispersion and drainage part 40 to also play a role in dust reduction, effectively reducing the dust generated when the screening main body 10 screens coal, and protecting the physical safety of people around the equipment.

[0032] See also Figure 1-Figure 5The screening main body 10 includes a chassis 110, a roller 120 and a motor 130. The roller 120 is rotatably arranged inside the chassis 110, the motor 130 is installed outside the chassis 110 to drive the roller 120 to rotate, and an upper hopper 140 is arranged at the front end above the chassis 110. The dust collection part 20 includes a collection tank 210, a dust hood 220 and a fan 230. The dust hood 220 is arranged above the chassis 110, the fan 230 is installed on the top of the dust hood 220, and the dust removal port of the fan 230 is connected to the collection tank 210 through a ventilation pipe 240, and a grid 250 is fixed inside the dust hood 220. The water spray cleaning part 30 includes a water spray pressurizing assembly 310 and a high-pressure nozzle 320, the high-pressure nozzle 320 is installed inside the dust hood 220, and the water spray pressurizing assembly 310 is installed on the chassis 110 to pressurize the water supply to the high-pressure nozzle 320. The water stain dispersion and drainage part 40 includes a shaft 410, an impeller 420 and a blade 430. The shaft 410 is rotatably arranged with the grid 250, the impeller 420 and the blade 430 are fixedly sleeved on the outside of the shaft 410 from top to bottom, and three groups of blades 430 are located outside the shaft 410 and are tilted in a ring array.

[0033] The dried coal is loaded from the upper hopper 140 to the top of the roller 120 inside the chassis 110. The motor 130 drives the roller 120 to rotate, and the multiple groups of rollers 120 are tilted. The rotating multiple groups of rollers 120 screen the coal transported from above. That is, large pieces of coal fall from the outlet along the rollers 120, and small pieces of coal fall from the gaps between adjacent rollers 120 to the bottom of the chassis 110 for discharge. When the coal is screened above the rollers 120, the running fan 230 puts the inside of the dust hood 220 in a negative pressure state. The dust hood 220 absorbs the dust generated in the coal during the screening process inside the chassis 110. Finally, the dust will enter the collection tank 210 through the ventilation pipe 240 and be collected, which can reduce the dust from the chassis 110. Diffusion outward has a good protective effect on the personnel around the equipment.

[0034] The water spray pressurizing assembly 310 in the water spray cleaning part 30 supplies water to the inside of the high-pressure nozzle 320, and the high-pressure fine water source sprayed from the high-pressure nozzle 320 impacts the impeller part 420, so that the impeller part 420 rotates around the shaft 410. At the same time, the high-pressure fine water column sprayed from the high-pressure nozzle 320 will also fall into the inside of the chassis 110 after impacting the impeller part 420, which has a certain wetting effect on the surface of the coal, preventing the dust on the surface of the coal from spreading into the air, and playing a role in curbing the spread of dust from the source of the coal.

[0035] When the impeller part 420 drives the shaft 410 to rotate, the rotating shaft 410 will drive the three groups of inclined blades 430 to rotate synchronously. The length of the blade 430 is longer than the diameter of the impeller part 420. The water source that impacts the impeller part 420 will fall on the blade 430, and the rotating blade 430 will make the water source that falls on the surface more dispersedly centrifugally spin into the dust cover 220 and fall into the inside of the chassis 110, so that the water source that impacts the impeller part 420 falls and splashes more and more evenly on the coal transported above the roller 120, and the water source after the impact can be better utilized. When the blade 430 is driven to rotate, it can also generate a certain upward air flow, and cooperate with the original fan 230 for secondary pressurization, so that the dust inside the chassis 110 can be more efficiently sucked into the dust cover 220.

[0036] In the above specific implementation, please refer to Figure 4 The water spray pressurizing assembly 310 includes a water pump 312 and a connecting pipe 313, one end of the connecting pipe 313 is connected to the water outlet port of the water pump 312, and the high-pressure nozzle 320 is connected to the connecting pipe 313. The water pump 312 extracts and pressurizes the external water source, and the pressurized water source is finally sprayed out from the high-pressure nozzle 320 through the connecting pipe 313. The water spray pressurizing assembly 310 also includes a bottom plate 311, which is fixed to the outside of the chassis 110 by welding, and the water pump 312 is installed above the bottom plate 311. The bottom plate 311 can be used to support and install the water pump 312.

[0037] For details, please refer to Figure 5 The water stain dispersing and draining part 40 further includes a support 440, which is disposed on the grid 250, and the bottom end of the shaft 410 is rotatably connected to the support 440, and the support 440 increases the stability of the shaft 410. The water stain dispersing and draining part 40 further includes a limit cover 450, which is fixedly disposed on the top of the shaft 410.

[0038] For further information, see Figure 2 A fixing plate is fixed on the outside of the chassis 110 by bolts, and the motor 130 is installed at the bottom of the fixing plate. Multiple groups of rollers 120 are arranged obliquely downward inside the chassis 110, and each motor 130 drives a roller 120 to rotate. The roller 120 is provided with an annular structure and an axial groove on the outside.

[0039] Specifically, a sieve plate is provided outside the roller 120. The sieve plate is an annular mesh structure and is sleeved outside the roller 120 to support the moving coal blocks above the roller 120. The coal blocks have greater friction when moving, that is, the coal blocks can move more smoothly.

[0040] In a specific configuration, the screening main body 10 further includes a discharge plate 150 , which is disposed at the rear end of the chassis 110 , and is used to guide the discharge of large pieces of coal.

[0041] Furthermore, the chassis 110 includes a box body and a base frame, the base frame is fixedly arranged at the bottom of the box body, and the screening main body 10 also includes a reinforcement beam 160, which is fixedly arranged inside the chassis 110 to support the box body.

[0042] When the above-mentioned coal screening equipment is performing dust removal operations, part of the water sprayed from the high-pressure nozzle 320 onto the impeller part 420 is spun to the outside due to the centrifugal action of the impeller part 420, and it is difficult for a large amount of water to fall on the blade 430 and be evenly dispersed into the coal above the roller 120.

[0043] In the above specific implementation, please refer to Figure 4 , Figure 5 and Figure 6 The impeller part 420 includes a base 421, a sleeve 422, an impeller blade 423 and an outer ring plate 424. The sleeve 422 is fixedly sleeved on the outside of the shaft 410, and the sleeve 422 and the shaft 410 can be fixed by welding. The base 421 is fixedly sleeved on the outside of the sleeve 422. A plurality of impeller blades 423 are arranged in an annular array above the base 421, and the impeller blades 423 are arc-shaped structures. The outer ring plate 424 is fixedly sleeved on the periphery of the base 421, and the base 421, the sleeve 422, the base 421 and the impeller blades 423 are integrally formed. The base 421 is arranged to be gradually tilted downward from the inside to the outside along the radial position of the shaft 410, and a through hole 426 is arranged at the bottom of the radial end of the impeller blade 423 near the shaft 410, and a water outlet groove 425 is arranged on the base 421 above the blade 430, and the water outlet groove 425 is located between two adjacent impeller blades 423.

[0044] The high-pressure water column sprayed from the high-pressure nozzle 320 impacts the inner arc wall of the arc-shaped impeller blade 423 above the base 421, and the water source falling between the impeller blades 423 will fall on the inner side of the outer ring plate 424 along the inclined base 421. The water source between adjacent impeller blades 423 will gradually flow into the water outlet slot 425 through the impeller blades 423 at the end and fall on the blade 430. Since the blade 430 and the impeller part 420 rotate synchronously, the blade 430 outside the shaft 410 is always located below the water outlet slot 425, that is, three groups of water outlet slots 425 are also opened above the base 421. The water source that flows into the water outlet groove 425 will fall on the surface of the blade 430. The rotating blade 430 will quickly disperse the collected water source into the dust hood 220, so that the water source that impacts the impeller blade 423 in the impeller part 420 can be collected more. Finally, the rotating blade 430 will disperse the water into water droplets that evenly fall on the coal blocks above the roller 120, thereby improving the dispersion utilization rate of the water source, and further dispersing the impact water source more and more evenly on the coal surface, which can better reduce the dust generated when screening the coal.

[0045] When the fine water column sprayed by the high-pressure nozzle 320 impacts the inner curved surface of the arc-shaped impeller blade 423, the arc-shaped impeller blade 423 plays a certain role in guiding and buffering, which can reduce the splashing and diffusion of water stains impacting the impeller blade 423, that is, it can guide more water sources impacting the impeller blade 423 to be collected and fall on the top of the blade 430.

[0046] Among them, the height of the outer ring plate 424 is lower than the height of the water column sprayed by the high-pressure nozzle 320, so as to prevent the outer ring plate 424 from blocking the water column sprayed by the high-pressure nozzle 320, and at the same time ensure that the outer ring plate 424 surrounds the outside of the base 421 to block the water source that is diffused outward due to centrifugal force.

[0047] When the rollers 120 in the chassis 110 transport coal blocks for screening, and the dust hood 220 in the dust collecting part 20 collects dust, a large space is left between the side of the dust hood 220 and the chassis 110, and some dust can easily diffuse outward from this area.

[0048] See also Figure 7 and Figure 8 The coal screening equipment also includes an airflow blocking part 50, which includes a beam plate 510, a flexible strip 520, a fixing bolt 540 and a limit card plate 550 of an L-shaped structure. A mounting groove 530 is provided at the bottom of the beam plate 510, and a plurality of flexible strips 520 are adjacently arranged inside the chassis 110, and the top of the flexible strip 520 is inserted inside the mounting groove 530. The limit card plate 550 is arranged on one side of the flexible strip 520, and the fixing bolt 540 connects the beam plate 510, the flexible strip 520 and the limit card plate 550. The beam plate 510, the flexible strip 520 and the limit card plate 550 are all provided with mounting holes that match the fixing bolt 540.

[0049] The roller 120 transports and sieves the coal at the same time, and a certain amount of dust will be generated during the sieving process. When the dust hood 220 in the dust collection part 20 absorbs the dust brought by the coal above the roller 120 inside the chassis 110, the multiple flexible strips 520 in the airflow blocking part 50 block the space between the dust hood 220 and the side of the chassis 110. At this time, a large amount of air will flow into the chassis 110 from the broken coal discharge port at the bottom of the chassis 110, and the inflowing air will enter the dust hood 220 together with the dust inside the chassis 110, and finally be absorbed by the collection tank 210. This design can not only effectively reduce the dust from the inside of the chassis 110 to the outside, but also make the dust inside the chassis 110 more likely to be sucked in and collected by the dust collection part 20.

[0050] The bottom of the beam 510 is provided with a plurality of flexible strips 520, and the flexible strips 520 can be made of thin rubber strips with good flexibility, and the thickness of the flexible strips 520 is preferably less than 2 mm. When the bottom of the flexible strips 520 contacts the coal transported above the roller 120, the moving coal can also push the bottom of the corresponding flexible strips 520 to move, so that the large pieces of coal above the roller 120 can be transported smoothly. At the same time, the multiple sets of flexible strips 520 can also better block the open space area between the dust hood 220 and the chassis 110, further improving the dust removal efficiency.

[0051] The top of the flexible strip 520 is fixed to the mounting groove 530 by a fixing bolt 540, and the limiting clamp plate 550 plays a stabilizing and limiting role. When a certain flexible strip 520 is damaged, the corresponding flexible strip 520 can be removed and replaced, saving the use of materials.

[0052] It should be noted that the specific model specifications of the water pump 312, fan 230, and motor 130 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be described in detail. The power supply and principle of the water pump 312, fan 230, and motor 130 are clear to those skilled in the art and will not be described in detail here.

[0053] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0054] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A coal screening device, characterized in that: include: A screening main body (10), the screening main body (10) comprising a chassis (110), a roller (120) and a motor (130), the roller (120) being rotatably arranged inside the chassis (110), the motor (130) being installed outside the chassis (110) to drive the roller (120) to rotate, and an upper hopper (140) being arranged at the front end above the chassis (110); A dust collection part (20), the dust collection part (20) comprising a collection tank (210), a dust hood (220) and a fan (230), the dust hood (220) being arranged above the chassis (110), the fan (230) being mounted on the top of the dust hood (220), and the dust removal port of the fan (230) being connected to the collection tank (210) via a ventilation pipe (240), and a grid (250) being fixed inside the dust hood (220); A water spray cleaning part (30), the water spray cleaning part (30) comprising a water spray pressurizing assembly (310) and a high-pressure nozzle (320), the high-pressure nozzle (320) being installed inside the dust cover (220), and the water spray pressurizing assembly (310) being installed on the chassis (110) to supply pressurized water to the high-pressure nozzle (320); A water stain dispersion and drainage portion (40), the water stain dispersion and drainage portion (40) comprising a shaft (410), an impeller portion (420) and a blade (430), the shaft (410) being rotatably arranged with the grid (250), the impeller portion (420) and the blade (430) being fixedly sleeved on the outside of the shaft (410) from top to bottom, and three groups of the blades (430) being located on the outside of the shaft (410) and being tilted in a ring-shaped array.

2. A coal screening device according to claim 1, characterized in that: The water spray pressurizing assembly (310) comprises a water pump (312) and a connecting pipe (313), one end of the connecting pipe (313) being connected to a water outlet port of the water pump (312), and the high-pressure spray head (320) being connected to the connecting pipe (313).

3. A coal screening device according to claim 2, characterized in that: The water spray pressurizing assembly (310) further comprises a bottom plate (311), wherein the bottom plate (311) is fixed to the outside of the chassis (110), and the water pump (312) is installed above the bottom plate (311).

4. A coal screening device according to claim 1, characterized in that: The water stain dispersion and drainage portion (40) further comprises a support (440), wherein the support (440) is arranged on the grid (250), and the bottom end of the shaft (410) is rotatably connected to the support (440).

5. A coal screening device according to claim 4, characterized in that: The water stain dispersion and drainage portion (40) further comprises a limiting cover (450), wherein the limiting cover (450) is fixedly arranged on the top end of the shaft (410).

6. The coal screening device according to claim 1, characterized in that: A fixing plate is arranged outside the chassis (110), and the motor (130) is mounted on the bottom of the fixing plate.

7. The coal screening equipment according to claim 1, characterized in that: A plurality of groups of rollers (120) are arranged inside the housing (110) to be tilted downward, and each motor (130) drives one roller (120) to rotate.

8. A coal screening device according to claim 7, characterized in that: A sieve plate is arranged outside the roller (120).

9. The coal screening device according to claim 1, characterized in that: The screening main body part (10) further comprises a blanking plate (150), wherein the blanking plate (150) is arranged at the rear end of the chassis (110).

10. The coal screening device according to claim 1, characterized in that: The machine box (110) comprises a box body and a bottom frame, the bottom frame being fixedly arranged at the bottom of the box body, and the screening main body (10) further comprises a reinforcing beam (160), the reinforcing beam (160) being fixedly arranged inside the machine box (110) to support the box body.

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