Automatic impurity removal separator for coal conveying

Abstract

The invention belongs to the technical field of coal conveying, and particularly relates to an automatic impurity removal separator for coal conveying, which comprises a multi-stage screening device, a separation device, a separation device, a separation device, a separation device and a control device, and is characterized in that the multi-stage screening device comprises a screening cavity with a feeding end and a discharging end; a plurality of screening areas are sequentially arranged on the screening bottom face of the screening cavity in the material conveying direction, and screening parts with through hole diameters gradually increased in the conveying direction are arranged in the screening areas so that materials can be sorted according to the particle size. The plurality of material collecting devices are correspondingly arranged below the screening areas and the discharging end and are used for collecting materials with different granularities respectively; and the material conveying device is arranged below the multi-stage screening device and is used for receiving and conveying the materials discharged by the at least one material collecting device.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal conveying, and particularly relates to an automatic impurity removal and separation machine for coal conveying. BACKGROUND

[0002] The coal mine conveying device is a crucial equipment in coal mine production, mainly used for transporting coal from the mining working face to the ground or other designated locations, and common ones are the scraper conveyor and the belt conveyor.

[0003] At present, in the coal mine conveying process, since a large amount of impurities are contained in the coal mine, the coal mine usually needs to be de-impurified before being transported to other workstations.

[0004] For example, in the prior art, a Chinese utility model patent with the publication number CN221875855U discloses an impurity removal mechanism for coal conveying, which comprises a conveying frame, a cleaning mechanism is arranged above the conveying frame, the cleaning mechanism comprises a protection box fixedly connected with the conveying frame, a connecting rod is rotatably connected inside the protection box, a sliding block is fixedly connected to one end of the connecting rod, a sliding rail is slidably connected outside the sliding block, and a sliding rod is fixedly connected to the outer surface of the sliding rail.

[0005] The impurity removal mechanism for coal conveying in the prior art including the above, although can perform impurity removal to a certain extent, but the impurity removal effect is not ideal, because the coal impurity removal usually needs to remove both small-particle impurities and large-particle impurities, such as gangue, wood blocks, metal blocks and other large-particle impurities, and clay, pyrite and other mineral substances and some fine dust and other small-particle impurities, and the impurity removal mechanism in the prior art cannot screen out impurities of different particle sizes to retain coal of ideal size.

[0006] To solve the above problems, an automatic impurity removal and separation machine for coal conveying is proposed in the present application. SUMMARY

[0007] To solve the above problems in the prior art, the present application provides an automatic impurity removal and separation machine for coal conveying, which has the characteristics of convenient use and high impurity removal efficiency.

[0008] To achieve the above purpose, the present application provides the following technical scheme: an automatic impurity removal and separation machine for coal conveying, comprising:

[0009] The multi-stage screening device comprises a screening chamber having an inlet end and an outlet end; the screening bottom surface of the screening chamber is sequentially provided with a plurality of screening areas along the material conveying direction, and the screening area is provided with a screening component with a through hole aperture gradually increasing along the conveying direction, so as to separate the material according to the particle size;

[0010] A plurality of material collecting devices are correspondingly arranged below each screening area and the discharge end for collecting materials of different particle sizes respectively.

[0011] A material conveying device is arranged below the multi-stage screening device for receiving and conveying the materials discharged by the at least one material collecting device.

[0012] The multi-stage screening device further comprises a feeding hopper arranged at the feeding end of the screening chamber and a conveying mechanism arranged inside the screening chamber for conveying the materials to the discharge end.

[0013] The conveying mechanism comprises a rotating shaft rotatably arranged in the screening chamber, a helical blade fixed on the rotating shaft, and a first driving motor for driving the rotating shaft to rotate.

[0014] The screening component is a sieve hole directly processed on the bottom surface of the screening chamber.

[0015] The sieve hole comprises a first-stage sieve hole, a second-stage sieve hole, and a third-stage sieve hole with gradually increasing hole diameters.

[0016] The material collecting device comprises a first-stage lower hopper, a second-stage lower hopper, a third-stage lower hopper correspondingly arranged below each screening area, and a fourth-stage lower hopper arranged at the discharge end.

[0017] An electromagnetic vibrator is fixed on the bottom surface of the material collecting device for assisting in discharging and preventing clogging.

[0018] The material conveying device comprises a rack, a carrier roller rotatably arranged at both ends of the rack, a transmission belt tensioned on the two carrier rollers, and a second driving motor for driving the carrier roller to rotate.

[0019] A plurality of blocking bars for preventing materials from sliding are fixed on the outer surface of the transmission belt at equal intervals.

[0020] A support frame is further included and fixed on the bottom of the rack.

[0021] The material conveying device further comprises an auxiliary material guiding mechanism, which comprises a lifting frame arranged on the upper side of the lower end of the rack and a material guiding hopper fixed on the lifting frame for guiding the materials into the transmission belt.

[0022] The auxiliary material guiding mechanism further comprises a driving component connected with the lifting frame for driving the lifting frame to vertically ascend and descend to adjust the height position of the material guiding hopper.

[0023] The driving component comprises a double-shaft air cylinder fixed on the rack, and the piston rod of the double-shaft air cylinder is fixedly connected with the lifting frame.

[0024] The auxiliary guide mechanism further comprises a guide assembly, which comprises a bracket fixed on the frame and a guide column fixed on the bottom surface of the lifting frame, and the bracket is provided with a connecting hole in which the guide column is embedded and slides.

[0025] The present application has the following advantages:

[0026] In the present application, the multi-stage screening can be realized by the screening mechanism, the large and small impurities in the coal can be effectively screened out, the ideal size of the coal can be fully reserved, and the screening efficiency is high; the material conveying device can be set as required, which can be used for conveying the coal with appropriate size to other stations, and can also convey the impurities, thereby facilitating the recycling and treatment of the impurities.

[0027] Other additional advantages and benefits of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the present application;

[0029] Figure 2 is an axonometric structural schematic diagram of the material conveying device in the present application;

[0030] Figure 3 is an enlarged structural schematic diagram of the auxiliary guide mechanism in the present application; Figure 2

[0031] Figure 4 is a cross-sectional structural schematic diagram of the screening mechanism in the present application.

[0032] LIST OF REFERENCE NUMBERS:

[0033] 1, screening mechanism; 11, screening chamber; 111, first-stage screen hole; 112, second-stage screen hole; 113, third-stage screen hole; 12, feeding hopper; 13, conveying mechanism; 131, rotating shaft; 132, helical blade; 133, first driving motor; 14, first-stage discharging hopper; 15, second-stage discharging hopper; 16, third-stage discharging hopper; 17, fourth-stage discharging hopper; 18, electromagnetic vibrator; 2, material conveying device; 21, frame; 22, carrier roller; 23, transmission belt; 231, blocking strip; 24, second driving motor; 25, support frame; 26, auxiliary guide mechanism; 261, lifting frame; 262, guide hopper; 263, bracket; 2631, connecting hole; 264, double-shaft air cylinder; 265, guide column. DETAILED DESCRIPTION

[0034] ​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] Embodiment 1

[0036] The embodiment of the present application provides an automatic impurity separation machine for coal conveying, which comprises a multi-stage screening device, a plurality of material collecting devices and a material conveying device. The multi-stage screening device comprises a screening chamber 11 having a feeding end and a discharging end. A plurality of screening areas are sequentially arranged on the screening bottom surface of the screening chamber 11 along the material conveying direction. The screening areas are provided with screening components with gradually increasing through hole diameters along the conveying direction, so as to sort the materials according to particle size. A plurality of material collecting devices are correspondingly arranged below each of the screening areas and the discharging end, for collecting materials of different particle sizes respectively. A material conveying device 2 is arranged below the multi-stage screening device, for receiving and conveying the materials discharged by at least one of the material collecting devices. The multi-stage screening device is provided with screening components with gradually increasing through hole diameters on the screening bottom surface of the screening chamber 11, so as to automatically and continuously complete multi-stage sorting from fine to coarse during the conveying process of the materials, with high sorting precision and high efficiency. By correspondingly arranging a plurality of material collecting devices, the impurities in the coal can be accurately separated from the target product and collected in categories, which is convenient for differential treatment and resource utilization. The material conveying device 2 directly receives the sorted materials, realizes seamless connection between the screening and conveying processes, forms a continuous automatic production line, reduces manual intervention, and improves overall operation efficiency.

[0037] The multi-stage screening device further comprises a feeding hopper 12 arranged at the feeding end of the screening chamber 11, and a conveying mechanism 13 arranged inside the screening chamber 11 for conveying the materials to the discharging end. The feeding hopper 12 arranged at the feeding end of the screening chamber 11 and the conveying mechanism 13 inside the screening chamber 11 ensure that the materials can be uniformly and stably conveyed, providing a necessary prerequisite for subsequent efficient and accurate sorting.

[0038] The conveying mechanism 13 comprises a rotating shaft 131 rotatably installed in the screening chamber 11, a spiral blade 132 fixed on the rotating shaft 131, and a first driving motor 133 for driving the rotating shaft 131 to rotate. The conveying mechanism 13 adopts a spiral conveying mechanism comprising the rotating shaft 131 and the spiral blade 132, which can turn and stir the material while conveying the material, thereby helping to prevent the screen hole from being blocked and improving the screening efficiency. The mechanism is structurally solid, driven by the first driving motor 133, and runs smoothly and reliably, can withstand the abrasion and impact of coal material, and has low maintenance cost.

[0039] The screening component is a screen hole directly machined on the bottom surface of the screening chamber 11, which comprises a first screen hole 111, a second screen hole 112 and a third screen hole 113 with gradually increasing hole diameters. The screening component is the first screen hole 111, the second screen hole 112 and the third screen hole 113 directly machined on the bottom surface of the screening chamber 11. Such an integrated structure avoids the problems of looseness and damage of the additional screen mesh, and has better overall rigidity and wear resistance. The clearly divided screen holes with gradually increasing hole diameters enable different particle sizes of the material to be clearly and accurately separated, and the separation effect is stable.

[0040] The material collecting device comprises a first discharge hopper 14, a second discharge hopper 15, a third discharge hopper 16 and a fourth discharge hopper 17 arranged correspondingly below each screening area, and an electromagnetic vibrator 18 fixed on the bottom surface of each discharge hopper for assisting in discharging and preventing blockage. The bottom surface of each discharge hopper is fixed with an electromagnetic vibrator 18, which can effectively break the arch and clear the blockage through high-frequency micro-vibration, thereby ensuring that various materials can be smoothly discharged and fundamentally avoiding production interruption caused by blockage. This design significantly improves the continuity of equipment operation, reduces the number of cleaning stops, and thus greatly improves the production efficiency.

[0041] The material conveying device 2 comprises a rack 21, a carrier roller 22 rotatably installed at both ends of the rack 21, a transmission belt 23 tensioned on the two carrier rollers 22, and a second driving motor 24 for driving the carrier roller 22 to rotate. The outer surface of the transmission belt 23 is fixed with a plurality of blocking strips 231 for preventing the material from sliding. The material conveying device 2 further comprises a support frame 25 fixed to the bottom of the rack 21. The material conveying device 2 is a belt conveyor, which can realize large-angle or vertical lifting of the material and effectively save the floor space. The plurality of blocking strips 231 fixed on the outer surface of the transmission belt 23 can form independent material carrying units, which can effectively prevent the material from rolling back or sliding down during lifting, thereby ensuring the reliability of the lifting operation. The support frame 25 fixed to the bottom of the rack 21 provides stable support for the entire conveyor, thereby ensuring the stability and safety of the equipment under heavy load.

[0042] The material conveying device 2 further comprises an auxiliary material guiding mechanism 26, which comprises a lifting frame 261 arranged on the upper side of the lower end of the rack 21 and a material guiding hopper 262 fixed on the lifting frame 261 and used for guiding the material into the conveying belt 23. The auxiliary material guiding mechanism 26 comprises the lifting frame 261 and the material guiding hopper 262, which can accurately guide the material falling from the overhead discharge hopper to the center position of the conveying belt 23, effectively preventing the material from scattering and dust flying. By adjusting the height of the material guiding hopper 262 through the lifting frame 261, it can be flexibly aligned with different discharge hoppers, realizing the flexible operation demand of a single elevator serving multiple discharge points.

[0043] The auxiliary material guiding mechanism 26 further comprises a driving component connected with the lifting frame 261 and used for driving the lifting frame 261 to lift along the vertical direction to adjust the height position of the material guiding hopper 262. The auxiliary material guiding mechanism 26 further comprises a driving component for automatically driving the lifting frame 261 to lift along the vertical direction to adjust the height position of the material guiding hopper 262, which eliminates the tedious manual positioning operation, has high adjustment precision and speed, and improves the automation level. The driving component adopts a double-shaft air cylinder 264 symmetrically fixed on the rack 21, the piston rod of which is fixedly connected with the lifting frame 261, which can provide synchronous and stable driving force, ensuring stable and reliable lifting process without jamming or skewing.

[0044] The auxiliary material guiding mechanism 26 further comprises a guide assembly, which comprises a bracket 263 fixed on the rack 21 and a guide column 265 fixed on the bottom surface of the lifting frame 261, and the bracket 263 is processed with a connecting hole 2631 for embedding and sliding the guide column 265, which provides a solid guide for the lifting frame 261 and effectively prevents it from shaking or rotating during lifting. This guide structure transmits the lateral force generated during lifting to the rack 21, reducing the radial load of the driving components such as the double-shaft air cylinder 264, thereby protecting the driving components and prolonging their service life.

[0045] As shown in Figures 1 to 4 The present embodiment provides an automatic impurity separation machine for coal conveying. The core of the device includes a multi-stage screening device, a plurality of material collecting devices, and a material conveying device 2, which work together to realize continuous automatic impurity removal and particle size sorting of coal.

[0046] The main body of the multi-stage screening device is a horizontally placed cylindrical screening chamber 11, and a feeding hopper 12 is fixedly installed at the top of the feeding end for receiving the coal to be treated. A screw conveying mechanism composed of a rotating shaft 131, a screw blade 132 and a first driving motor 133 is arranged inside the screening chamber 11, which is responsible for smoothly conveying the material from the feeding end to the discharging end. The screening bottom surface of the screening chamber 11 is specially designed and sequentially processed with screen holes with gradually increasing hole diameters along the material conveying direction: a first-stage screen hole 111 (hole diameter 10 mm) near the feeding end, a second-stage screen hole 112 (hole diameter 30 mm) in the middle of the chamber, and a third-stage screen hole 113 (hole diameter 50 mm) near the discharging end. This integrally formed screen hole structure not only avoids the loosening and damage problems of the additional screen mesh, but also significantly improves the overall rigidity and wear resistance of the equipment.

[0047] Below the screening chamber 11, a first-stage discharge hopper 14, a second-stage discharge hopper 15, a third-stage discharge hopper 16 and a fourth-stage discharge hopper 17 are arranged corresponding to each screening area and the discharging end, forming a complete material collection system. The bottom surface of each discharge hopper is symmetrically installed with two electromagnetic vibrators 18, which effectively break the material arch and clean the blockage by generating high-frequency micro-vibration, ensuring smooth discharge of various materials. This design fundamentally avoids production interruption caused by blockage, significantly improving the continuity of equipment operation.

[0048] The material conveying device 2 adopts an inclined belt conveyor, which is located below the multi-stage screening device and is mainly used to lift and convey the target product (coal discharged from the third-stage discharge hopper 16) to the next process. The belt conveyor includes a rack 21 welded from profile steel, a carrier roller 22 rotatably installed at both ends of the rack, a transmission belt 23 tensioned between the carrier rollers, and a second driving motor 24 driving the carrier rollers to rotate. To improve the conveying reliability, a plurality of baffle strips 231 are fixed on the outer surface of the transmission belt 23 at equal intervals, forming independent material carrying units, which effectively prevent the coal from rolling back or falling off during inclined conveying. The support frame 25 fixed at the bottom of the rack 21 provides stable support for the entire belt conveyor, ensuring the stability and safety of the equipment during operation under heavy load.

[0049] To further enhance the adaptability of the device, the adjustable auxiliary guide mechanism 26 is arranged at the feeding end of the belt conveyor. The mechanism includes a lifting frame 261 arranged on the side of the frame 21, a guide hopper 262 fixed on the top of the lifting frame, a double-shaft pneumatic cylinder 264 symmetrically fixed on the frame, and a guide assembly composed of a bracket 263 and a guide column 265. The guide column 265 is fixed to the bottom surface of the lifting frame 261 and embedded in the connecting hole 2631 of the bracket 263, forming a precise sliding fit. By controlling the extension and retraction of the piston rod of the double-shaft pneumatic cylinder 264, the lifting frame 261 can drive the guide hopper 262 to stably lift along the vertical direction, so that the discharge port can accurately align with the discharge hopper at different heights. The setting of the guide assembly effectively prevents the deflection phenomenon during lifting, and at the same time transmits the lateral force to the frame, protecting the driving components from radial load.

[0050] In actual work process, first start the first drive motor 133, the second drive motor 24 and all electromagnetic vibrators 18. After the raw coal is thrown into the feeding hopper 12, it moves forward along the screening chamber 11 under the pushing of the rotating spiral blade 132. In this process, the fine particles smaller than 10 mm first pass through the first-level screen hole 111 and fall into the first-level discharge hopper 14; the medium particles of 10-30 mm then pass through the second-level screen hole 112 and fall into the second-level discharge hopper 15; the target coal of 30-50 mm passes through the third-level screen hole 113 and falls into the third-level discharge hopper 16; and the large block material larger than 50 mm finally falls into the fourth-level discharge hopper 17 from the discharge end. By controlling the double-shaft pneumatic cylinder 264 to lift the guide hopper 262 to the position of butt joint with the outlet of the third-level discharge hopper 16, the target coal accurately guided by the guide hopper 262 falls to the conveying belt 23, is supported by the baffle 231 and is conveyed upward to the designated work station, thereby completing the whole process of automatic impurity removal, separation and conveying of the coal.

[0051] The embodiment realizes accurate particle size separation of the coal through the multi-stage screening device, ensures smooth discharge of the material by the electromagnetic vibrator, realizes flexible operation by the adjustable auxiliary guide mechanism, finally forms a complete automatic production line, and significantly improves the efficiency and reliability of the coal impurity removal and separation, while reducing the manual intervention and maintenance cost.

[0052] Embodiment 2:

[0053] Please refer to Figures 1 to 4 The present application provides the following technical scheme: an automatic impurity removal and separation machine for coal conveying, comprising a screening mechanism 1 and a material conveying device 2 arranged below the screening mechanism 1, wherein the screening mechanism 1 comprises a screening chamber 11, a feeding hopper 12, a conveying mechanism 13, a first-level discharge hopper 14, a second-level discharge hopper 15, a third-level discharge hopper 16 and a fourth-level discharge hopper 17.

[0054] Further, by Figure 1 and Figure 4As shown, in the embodiment, the bottom side of the screening chamber 11 is machined with a first screen hole 111, a second screen hole 112 and a third screen hole 113 from the feeding end to the discharging end, and the diameters of the first screen hole 111, the second screen hole 112 and the third screen hole 113 increase gradually, the feeding hopper 12 is fixed to the top side of the feeding end of the screening chamber 11, the conveying mechanism 13 is arranged in the screening chamber 11 and used for pushing the coal from the feeding end to the discharging end, the first discharge hopper 14 is fixed to the bottom side of the screening chamber 11 and corresponds to the first screen hole 111, the second discharge hopper 15 is fixed to the bottom side of the screening chamber 11 and corresponds to the second screen hole 112, the third discharge hopper 16 is fixed to the bottom side of the screening chamber 11 and corresponds to the third screen hole 113, and the fourth discharge hopper 17 is fixed to the bottom side of the discharging end of the screening chamber 11, after the above scheme is used, in use, the conveying mechanism 13 is started, the coal to be removed is put into the feeding hopper 12, and the conveying mechanism 13 pushes the coal from the feeding end to the discharging end, in the process of pushing, the coal is screened through the first screen hole 111, the second screen hole 112 and the third screen hole 113 in turn, and different impurities are removed, for example, small-particle impurities are discharged from the first screen hole 111 and the second screen hole 112, large-particle impurities are discharged from the fourth discharge hopper 17, and the required coal is discharged from the third discharge hopper 16, and the discharged coal is transmitted through the material conveying device 2; the screening device 1 arranged in the embodiment can realize multi-stage screening, can effectively remove large-particle impurities and small-particle impurities in the coal, and fully retains the ideal size of the coal, and has high screening efficiency; the material conveying device 2 can be arranged as required, can be used for conveying the coal of the appropriate size to other stations, and can also convey the impurities, thereby facilitating recycling and processing of the impurities.

[0055] Alternatively, as shown in Figure 1 and Figure 4 As shown, in the embodiment, the conveying mechanism 13 includes a rotating shaft 131, a spiral blade 132 and a first driving motor 133, the rotating shaft 131 is rotationally installed in the screening chamber 11, the spiral blade 132 is fixed on the rotating shaft 131, and the first driving motor 133 is fixed to one end of the screening chamber 11 and used for driving the rotating shaft 131 to rotate, after the above scheme is used, in use, the first driving motor 133 is started to drive the rotating shaft 131 to rotate, and the spiral blade 132 rotates to push the coal.

[0056] Preferably, as shown in Figure 1 and Figure 4As shown in the drawings, in the embodiment, the screening mechanism 1 further comprises two electromagnetic vibrators 18, two electromagnetic vibrators 18 are symmetrically arranged on the bottom surface of the first hopper 14, the second hopper 15, the third hopper 16 and the fourth hopper 17. After the electromagnetic vibrators 18 are powered on, the electromagnetic vibrators 18 vibrate at high frequency, so that the first hopper 14, the second hopper 15, the third hopper 16 and the fourth hopper 17 vibrate, which facilitates reliable discharge of the coal and impurities and avoids blockage accidents.

[0057] Optionally, the screening mechanism 1 further comprises a second drive motor 18. Figure 1 and Figure 2 As shown in the drawings, in the embodiment, the material conveying device 2 comprises a rack 21, a carrier roller 22, a transmission belt 23, a second drive motor 24 and a support frame 25. Two racks 21 are symmetrically arranged, two carrier rollers 22 are symmetrically arranged and rotatably installed between the two racks 21, the transmission belt 23 is tensioned by the two carrier rollers 22, the second drive motor 24 is fixed to the outer wall of the rack 21 and used to drive the carrier roller 22 to rotate, and the support frame 25 is fixed to the bottom surface of the rack 21. After the above scheme is adopted, in use, the second drive motor 24 is started to drive the carrier roller 22 to rotate, and the transmission belt 23 rotates to convey the coal.

[0058] Preferably, the material conveying device 2 further comprises a plurality of blocking strips 231. Figure 1 and Figure 2 As shown in the drawings, in the embodiment, the material conveying device 2 further comprises a plurality of blocking strips 231, which are equally spaced and fixed to the outer wall of the transmission belt 23 in the short edge direction. After the above scheme is adopted, in use, the blocking strips 231 are used to support the coal, so that the coal does not slide down along the inclined surface of the transmission belt 23, and the reliability of the coal lifting is ensured.

[0059] Preferably, the material conveying device 2 further comprises a plurality of blocking strips 231. Figures 1 to 3 As shown in the drawings, in the embodiment, the material conveying device 2 further comprises an auxiliary material guiding mechanism 26, and the auxiliary material guiding mechanism 26 comprises a lifting frame 261 and a material guiding hopper 262. The lifting frame 261 is arranged on the upper side of the lower end of the rack 21, and the material guiding hopper 262 is fixed to the lifting frame 261. After the above scheme is adopted, in use, the material guiding hopper 262 is used for flow guiding to ensure that the coal reliably falls onto the transmission belt 23.

[0060] Preferably, the material conveying device 2 further comprises a plurality of blocking strips 231. Figures 1 to 3As shown, in the embodiment, the auxiliary guide mechanism 26 further comprises: two double-shaft air cylinders 264, which are fixed symmetrically on the rack 21, and the piston rods of the double-shaft air cylinders 264 are fixedly connected with the lifting frame 261. After the above scheme is adopted, in use, the height of the lifting frame 261 can be adjusted by starting the double-shaft air cylinders 264, so that the height of the guide hopper 262 is adjusted, the guide hopper 262 is conveniently connected with the first-stage discharge hopper 14, the second-stage discharge hopper 15, the third-stage discharge hopper 16 or the fourth-stage discharge hopper 17, and it is ensured that the coal reliably falls on the transmission belt 23.

[0061] Preferably, the circuit is connected by Figures 1 to 3 As shown, in the embodiment, further comprising: a support 263 and a guide column 265, the support 263 is fixed on the rack 21, and a connecting hole 2631 is processed in the support 263, and the guide column 265 is fixed on the bottom surface of the lifting frame 261 and embedded in the connecting hole 2631. After the above scheme is adopted, in use, when the lifting frame 261 moves in the vertical direction, the guide column 265 moves in the connecting hole 2631, the lifting frame 261 is guided, and the stability of the lifting frame 261 is improved.

[0062] It should be noted that the first drive motor 133, the electromagnetic vibrator 18, the second drive motor 24 and the double-shaft air cylinder 264 are all conventional devices purchased on the market, and the built-in power switch can be selected by the person skilled in the art according to the use requirement, the working principle thereof is the common knowledge of the person skilled in the art and has been fully disclosed by the prior art, and therefore will not be described in detail herein.

[0063] The circuit connection involved in the present application is a common means adopted by the person skilled in the art, and the technical inspiration can be obtained through a limited number of tests, and belongs to the widely used prior art.

[0064] The components not described in detail herein are the prior art.

[0065] The working principle and use process of the present application: in use, the first drive motor 133 is started to drive the rotating shaft 131 to rotate, the screw blade 132 is rotated, the second drive motor 24 is started to drive the carrier roller 22 to rotate, and the transmission belt 23 is rotated.

[0066] The coal to be removed is put into the feeding hopper 12, the screw blade 132 rotates and pushes the coal from the feeding end to the discharging end, in the process of pushing, the coal is screened by the first-stage screen hole 111, the second-stage screen hole 112 and the third-stage screen hole 113 in turn, and different impurities are removed, for example, small-particle impurities are discharged from the first-stage screen hole 111 and the second-stage screen hole 112, large-particle impurities are discharged from the fourth-stage discharge hopper 17, and the required coal is discharged from the third-stage discharge hopper 16, and the discharged coal is transported by the material conveying device 2.

[0067] The present application can realize multi-stage screening through the screening mechanism 1, can effectively screen out large and small impurities mixed in the coal, and fully retains the ideal size of the coal, and has high screening efficiency; the material conveying device 2 can be set as required, and can be used for conveying the coal with appropriate size to other stations, and can also convey the impurities, thereby facilitating the recycling and treatment of the impurities.

[0068] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. An automatic impurity removal and separation machine for coal conveying, characterized in that, include: A multi-stage screening device includes a screening chamber (11) with a feed end and a discharge end; the screening bottom surface of the screening chamber (11) is provided with multiple screening areas in sequence along the material conveying direction, and the screening areas are provided with screening components with through holes whose apertures gradually increase along the conveying direction, so as to sort the materials according to particle size; Multiple material collection devices are respectively arranged below each of the screening areas and the discharge end, for collecting materials of different particle sizes; The material conveying device (2) is located below the multi-stage screening device and is used to receive and convey the material discharged by at least one of the material collecting devices.

2. The automatic impurity removal and separation machine for coal conveying according to claim 1, characterized in that, The multi-stage screening device also includes a feed hopper (12) disposed at the feed end of the screening chamber (11) and a conveying mechanism (13) disposed inside the screening chamber (11) for conveying materials to the discharge end.

3. The automatic impurity removal and separation machine for coal conveying according to claim 2, characterized in that, The conveying mechanism (13) includes a rotating shaft (131) rotatably mounted in the screening chamber (11), a spiral blade (132) fixed on the rotating shaft (131), and a first drive motor (133) for driving the rotating shaft (131) to rotate.

4. The automatic impurity removal and separation machine for coal conveying according to claim 1, characterized in that, The screening component is a sieve hole directly machined on the bottom surface of the screening chamber (11); The sieve apertures include primary sieve apertures (111), secondary sieve apertures (112), and tertiary sieve apertures (113) with progressively increasing aperture sizes.

5. The automatic impurity removal and separation machine for coal conveying according to claim 1, characterized in that, The material collection device includes a primary discharge hopper (14), a secondary discharge hopper (15), a tertiary discharge hopper (16) respectively disposed below each screening area, and a quaternary discharge hopper (17) disposed at the discharge end. The bottom surface of each material collection device is fixed with an electromagnetic vibrator (18) for assisting in material discharge and preventing blockage.

6. The automatic impurity removal and separation machine for coal conveying according to claim 1, characterized in that, The material conveying device (2) includes a frame (21), idlers (22) rotatably mounted at both ends of the frame (21), a transmission belt (23) tensioned on the two idlers (22), and a second drive motor (24) for driving the idlers (22) to rotate. The outer surface of the conveyor belt (23) is fixed with multiple baffles (231) at equal intervals to prevent material from slipping. It also includes a support frame (25) fixed to the bottom of the frame (21).

7. The automatic impurity removal and separation machine for coal conveying according to claim 6, characterized in that, The material conveying device (2) further includes an auxiliary guiding mechanism (26), which includes a lifting frame (261) disposed on the upper side of the lower end of the frame (21) and a guide hopper (262) fixed on the lifting frame (261) for guiding the material into the conveyor belt (23).

8. The automatic impurity removal and separation machine for coal conveying according to claim 7, characterized in that, The auxiliary material guiding mechanism (26) also includes a driving component, which is connected to the lifting frame (261) and is used to drive the lifting frame (261) to rise and fall in the vertical direction to adjust the height position of the guide hopper (262).

9. The automatic impurity removal and separation machine for coal conveying according to claim 8, characterized in that, The driving component includes a dual-axis cylinder (264) symmetrically fixed on the frame (21), and the piston rod of the dual-axis cylinder (264) is fixedly connected to the lifting frame (261).

10. The automatic impurity removal and separation machine for coal conveying according to claim 8, characterized in that, The auxiliary material guiding mechanism (26) further includes a guiding component, which includes a support (263) fixed on the frame (21) and a guide post (265) fixed on the bottom surface of the lifting frame (261). The support (263) has a connecting hole (2631) for the guide post (265) to be inserted and slid.

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