High-efficiency wear-resistant coal crushing and screening integrated machine

Abstract

The present application belongs to the technical field of coal crushing and screening, and particularly relates to a high-efficiency wear-resistant coal crushing and screening integrated machine, which comprises a processing box and a feeding conveyor belt mechanism, and the inside of the processing box is provided with a crushing rotating mechanism for crushing coal, a throwing and crushing mechanism and a screening mechanism, the throwing and crushing mechanism being cooperatively arranged between the feeding conveyor belt mechanism and the crushing rotating mechanism; the screening mechanism is used for screening the coal crushed by the crushing rotating mechanism; the coal falling into the processing box is caught by the combination of the throwing plate and the auxiliary baffle, and whenever the throwing plate is deflected, the correspondingly arranged coil spring is tightened to store force, and after being deflected by a certain angle, the elastic force is released, so that the caught coal can be conveniently thrown onto the crushing baffle for preliminary impact crushing, that is, the coal is preliminarily impacted and crushed by relying on the inertial force and gravity in the coal throwing process, so that the load of the coal crushed by the rolling column is reduced, thereby reducing the wear.

Description

Technical Field

[0001] This invention belongs to the field of coal crushing and screening technology, specifically relating to a high-efficiency wear-resistant integrated coal crushing and screening machine. Background Technology

[0002] Before coal is used in coal-fired power plants, it needs to be crushed to ensure combustion efficiency. Therefore, crushing equipment is required to crush the coal, and the crushed coal also needs to be screened to ensure the crushing effect.

[0003] Existing coal raw material crushing and screening are all integrated into one set of equipment. The equipment generally uses paired rotating crushing rollers to crush the coal. Depending on the crushing needs, the crushing rollers are usually set to multiple stages. Then, the crushed coal is screened through a screening screen or filter plate. If it does not meet the requirements, it is sent back to the crushing position for crushing again.

[0004] However, existing coal raw material crushing and screening equipment directly crushes large pieces of coal raw material by squeezing them with rotating crushing rollers and other components. Therefore, the crushing rollers bear a large load when crushing begins, and the rolling and friction between coarse particles or large pieces of coal is quite strong, which easily causes a certain degree of wear on the crushing rollers, affecting their use. Over time, this leads to a deterioration in crushing efficiency. Furthermore, when the crushing rollers and other components wear to a certain extent and need to be replaced, because they are located inside the equipment and are relatively large, it is not convenient to disassemble and maintain the worn crushing rollers as a whole. Therefore, it is necessary to reduce the wear rate of the crushing rollers and thus reduce the maintenance frequency. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency and wear-resistant integrated coal crushing and screening machine to solve the technical problem that existing coal raw material crushing and screening equipment is prone to wear and affects its use when the coal is crushed by directly squeezing the coal with components such as crushing rollers.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A high-efficiency, wear-resistant integrated coal crushing and screening machine includes a processing box and a feeding conveyor belt mechanism. The processing box is equipped with a crushing rotary mechanism for crushing coal, and also includes:

[0008] A throwing crushing mechanism is configured between the feeding conveyor belt mechanism and the crushing rotation mechanism. The throwing crushing mechanism includes a rotating throwing mechanism and a crushing baffle. The rotating throwing mechanism is used to throw the coal conveyed by the feeding conveyor belt mechanism onto the crushing baffle for crushing.

[0009] The screening mechanism is used to screen the coal after it has been crushed by the crushing rotary mechanism. The screening mechanism includes a recovery conveying mechanism, which is used to recover the coal blocked by the screening and convey it to the top of the crushing rotary mechanism for further crushing.

[0010] Preferably, the crushing and rotating mechanism includes two crushing columns that are rotatably arranged inside the processing box and two transmission gears that are coaxially arranged with the two crushing columns. Each crushing column has circumferentially distributed teeth on its surface. The teeth on the surfaces of the two crushing columns are interlocked. The two transmission gears mesh with each other and are located outside the processing box. A drive motor for driving one of the transmission gears to rotate is also fixedly installed on the outside of the processing box via a mounting base.

[0011] More preferably, the rotary throwing mechanism is located below the discharge end of the feeding conveyor belt mechanism. The rotary throwing mechanism includes a throwing plate and an auxiliary baffle that are integrally connected. The side of the auxiliary baffle away from the throwing plate is bent upwards, and a V-shaped structure is formed between the auxiliary baffle and the throwing plate. The crushing baffle is disposed on one side of the throwing plate. A connecting shaft that is rotatably connected to the inner wall of the processing box is fixedly connected to the side where the throwing plate and the auxiliary baffle are connected. A disc spring is disposed between the connecting shaft and the inner wall of the processing box. An intermittent transmission mechanism is disposed between the connecting shaft and one of the transmission gears.

[0012] Preferably, the intermittent transmission mechanism includes a linkage gear and a missing gear. The linkage gear is coaxially and fixedly connected to the connecting shaft, and the missing gear is coaxially and fixedly connected to one of the transmission gears, and the missing gear cooperates with the linkage gear.

[0013] Furthermore, the throwing plate has multiple spherical grooves evenly distributed on the side facing the breaking baffle.

[0014] Furthermore, the side of the breaking baffle facing the throwing plate has a plurality of cone-shaped protrusions evenly distributed.

[0015] Preferably, both sides of the crushing baffle are fixedly connected to mounting plates, and both sides of the processing box are provided with slots that cooperate with the mounting plates.

[0016] Furthermore, the screening mechanism also includes an inclined screen plate and a circular arc receiving plate. The higher side of the inclined screen plate is aligned with the lower side of the crushing and rotating mechanism and is fixedly connected to the circular arc receiving plate. The recycling and conveying mechanism is configured between the circular arc receiving plate and the crushing and rotating mechanism.

[0017] Furthermore, the recycling conveying mechanism includes a conveyor belt, drive wheels, and scrapers. Two drive wheels are provided, and both are rotatably connected to the inner wall of the processing box. The conveyor belt is connected between the two drive wheels. Multiple scrapers are provided and equidistantly distributed along the conveyor belt. Each scraper is configured to cooperate with an arc-shaped receiving plate. When each scraper passes the position of the drive wheel near the arc-shaped receiving plate, the end of the scraper contacts the arc-shaped receiving plate. A transition guide plate is provided on one side of the top of the conveyor belt. The transition guide plate guides the coal pushed by the scrapers onto the crushing and rotating mechanism. The transition guide plate also cooperates with a throwing plate, and multiple crushing protrusions are evenly distributed on the side of the throwing plate near the transition guide plate.

[0018] Preferably, the missing gear and the transmission wheel on the side near the top of the rolling column are both coaxially fixedly connected to a synchronous pulley, and the two synchronous pulleys are connected by a synchronous belt.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention uses a combination of a throwing plate and an auxiliary baffle to catch the coal falling into the processing box. During the rotation of the crushing column, the crushing column drives the throwing plate to rotate intermittently through the cooperation of transmission gears and missing gears. Whenever the throwing plate deflects, the corresponding coil spring tightens and stores force. After deflecting to a certain angle, the spring force is released, which facilitates the rapid throwing of the caught coal onto the crushing baffle for initial crushing. That is, the initial impact crushing is carried out by the inertia force and gravity of the coal during the throwing process. In this way, the coal load processed by the crushing column is reduced, thereby reducing wear.

[0021] Furthermore, this invention uses an inclined screen plate to screen the coal crushed by the rolling mill column. Coal that does not pass through the inclined screen plate slides onto the arc-shaped receiving plate. The running conveyor belt then uses scrapers to scrape up the coal on the arc-shaped receiving plate and transports it again between the two rolling mill columns. During the transport process, the coal is guided by a transition guide plate, and the deflecting and energy-accumulating throwing plate presses against the transition guide plate, pre-crushing the coal that has not been screened and is about to enter the space between the rolling mill columns, thereby ensuring the crushing and screening effect and reducing the wear of the rolling mill columns.

[0022] Based on this, the present invention uses two transmission gears to drive the rolling column to rotate and crush coal. One of the transmission gears drives the throwing plate to swing back and forth through the cooperation of the missing gear and the linkage gear. At the same time, it drives the conveyor belt to run through the synchronous pulley and the synchronous belt. There is no need to control the rotation of the conveyor belt and the throwing plate separately. It can be ensured that only the operation of the rolling column is controlled to achieve the linkage of the conveyor belt and the throwing plate, which improves the convenience of operation and setting. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram showing the relative positions of the crushing column, the crushing baffle, and the throwing plate in this invention;

[0026] Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the rotating throwing mechanism in this invention;

[0028] Figure 5 This is a schematic diagram of the structure in which the transmission gear, the missing gear, and the linkage gear are connected in this invention.

[0029] Figure 6 This is a schematic diagram of the structure in which the conveyor belt body and the missing gear are connected in the present invention;

[0030] Figure 7 This is a schematic diagram of the state of the transition guide plate under the squeezing action during the deflection and power storage process of the rotating throwing mechanism in this invention;

[0031] In the diagram: 1. Processing box; 2. Feeding conveyor belt mechanism; 3. Discharge inclined guide plate; 4. Crushing column; 5. Crushing baffle; 6. Rotary throwing mechanism; 7. Inclined screen plate; 8. Transition guide plate; 9. Arc receiving plate; 10. Conveyor belt body; 11. Drive wheel; 12. Scraper; 13. Spherical trough; 14. Crushing convex ball; 15. Throwing plate; 16. Auxiliary baffle; 17. Transmission gear; 18. Drive motor; 19. Missing gear; 20. Synchronous pulley; 21. Synchronous belt; 22. Linkage gear; 23. Slot; 24. Mounting plate; 25. Conical protrusion; 26. Connecting shaft. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] In this technical solution, such as Figure 1-3 As shown, the high-efficiency wear-resistant coal crushing and screening integrated machine includes a processing box 1. The bottom of the processing box 1 is fixedly equipped with a discharge inclined guide plate 3, and the top side is fixedly equipped with a feeding conveyor belt mechanism 2. The feeding conveyor belt mechanism 2 is horizontally arranged and continuously feeds coal into the processing box 1 from the top. The processing box 1 is equipped with a crushing and rotating mechanism for crushing coal. The integrated machine also includes a throwing crushing mechanism and a screening mechanism.

[0035] A throwing crushing mechanism is configured between the feeding conveyor belt mechanism 2 and the crushing rotation mechanism. The throwing crushing mechanism includes a rotating throwing mechanism 6 and a crushing baffle 5. The rotating throwing mechanism 6 is used to throw the coal conveyed by the feeding conveyor belt mechanism 2 onto the crushing baffle 5 for crushing. This reduces the load on the crushing rotation mechanism and reduces its wear. A screening mechanism is configured below the crushing rotation mechanism to screen the coal after it has been crushed. The screening mechanism includes a recovery conveying mechanism, which is used to recover the coal blocked by the screening and convey it to the top of the crushing rotation mechanism for further crushing.

[0036] In some specific implementation plans, combined with Figure 2 and Figure 6As shown, the crushing and rotating mechanism includes two mating rollers 4 rotatably arranged inside the processing box 1, and two transmission gears 17 coaxially arranged with the two rollers 4 respectively. Each roller 4 has circumferentially distributed teeth on its surface, and the teeth on the surfaces of the two rollers 4 interlock to facilitate crushing the coal during the rotation of the rollers 4. The two transmission gears 17 mesh with each other and are located outside the processing box 1. A drive motor 18 for driving one of the transmission gears 17 is fixedly mounted outside the processing box 1 via a mounting base. Figure 2 From the perspective of the drive motor 18, the two compaction columns 4 are driven to rotate, with the left compaction column 4 rotating clockwise and the right compaction column 4 rotating counterclockwise.

[0037] In some specific implementation plans, such as Figures 2 to 4 As shown, the rotary throwing mechanism 6 is located below the discharge end of the feeding conveyor belt mechanism 2. The rotary throwing mechanism 6 includes an integrally connected throwing plate 15 and auxiliary baffle 16, with the auxiliary baffle 16 and the throwing plate 15 forming a V-shaped structure. The crushing baffle 5 is disposed on one side of the throwing plate 15. It should be noted that, in order to ensure that the coal falls between the two crushing columns 4 after being thrown and crushed, the relative positions of the crushing baffle 5, the rotary throwing mechanism 6, and the crushing columns 4 can be adjusted so that the rotary throwing mechanism 6 is as close as possible to the bottom of the feeding conveyor belt mechanism 2, and the crushing baffle 5 is as close as possible to the two crushing columns 4. A processing box is fixedly connected to one side of the connection between the throwing plate 15 and the auxiliary baffle 16. A connecting shaft 26 is rotatably connected to the inner wall of the processing box 1, and a coil spring is provided between the connecting shaft 26 and the inner wall of the processing box 1. The initial position of the throwing plate 15 is vertical, at which time the coil spring is in its original state and no rebound force is generated. When the throwing plate 15 rotates counterclockwise by the connecting shaft 26, the coil spring generates a rebound force. After rotating to the corresponding position, the rebound force is released, and the throwing plate 15 rotates quickly. The side of the auxiliary baffle 16 away from the throwing plate 15 bends upward and tilts up. When the feeding conveyor belt mechanism 2 transports coal into the processing box 1, the coal falls between the V-shaped structure formed by the auxiliary baffle 16 and the throwing plate 15. An intermittent transmission mechanism is provided between the connecting shaft 26 and one of the transmission gears 17.

[0038] Among them, such as Figure 5 As shown, the intermittent transmission mechanism includes a linkage gear 22 and a missing gear 19. The linkage gear 22 is coaxially and fixedly connected to the connecting shaft 26, and the missing gear 19 is coaxially and fixedly connected to one of the transmission gears 17, and the missing gear 19 cooperates with the linkage gear 22.

[0039] It should be noted that, with Figure 5As shown in the diagram, if the missing gear 19 is coaxially and fixedly connected to the right-side transmission gear 17, the missing gear 19 can directly mesh with the linkage gear 22 after rotating a certain angle, causing the linkage gear 22 to rotate clockwise. If the missing gear 19 is coaxially and fixedly connected to the left-side transmission gear 17, a gear is added between the missing gear 19 and the linkage gear 22 for transitional transmission, ensuring that the linkage gear 22 rotates clockwise. Thus, when the drive motor 18 drives the transmission gear 17 to rotate, causing the rolling column 4 inside the processing box 1 to rotate, the missing gear 19 rotates synchronously. When the effective tooth portion of the missing gear 19 rotates to below the linkage gear 22, the two mesh with each other, and then the missing gear... When the missing gear 19 rotates, it drives the linkage gear 22 to rotate. The linkage gear 22 then drives the throwing plate 15 to deflect away from the crushing baffle 5 via the connecting shaft 26. The coil spring tightens and generates a rebound force. At this time, the coal conveyed by the feeding conveyor belt mechanism 2 falls onto the throwing plate 15. After the missing gear 19 rotates a certain angle, its missing position coincides with the linkage gear 22. At this time, the linkage gear 22 has no rotational thrust. Then, the coil spring releases the rebound force instantly, so that the throwing plate 15 quickly rebounds and resets, making it easier to throw the caught coal onto the crushing baffle 5. This causes the coal to hit the crushing baffle 5 and be initially crushed, and then fall between the crushing columns 4 for further crushing. This process is repeated.

[0040] It should be noted that whenever the throwing plate 15 rotates to the vertical position, the auxiliary baffle 16 is positioned below to catch the continuously falling coal. Then, when the throwing plate 15 deflects again, it facilitates guiding the caught coal to slide onto the throwing plate 15 for easy throwing.

[0041] In some specific implementations, in order to facilitate the effective throwing of coal by the throwing plate 15, multiple spherical grooves 13 are evenly distributed on the side of the throwing plate 15 facing the crushing baffle 5. When the throwing plate 15 deflects and the coil spring stores force, the coal that slides onto the throwing plate 15 is held in place by the spherical grooves 13, which facilitates subsequent throwing.

[0042] In some specific implementations, in order to facilitate the crushing of coal impacting the crushing baffle 5, the side of the crushing baffle 5 facing the throwing plate 15 is evenly distributed with multiple conical protrusions 25. When coal is thrown onto the crushing baffle 5, the tip of the conical protrusion 25 enhances the crushing effect.

[0043] In some specific implementation plans, such as Figure 5 As shown, both sides of the crushing baffle 5 are fixedly connected with mounting plates 24, and both sides of the processing box 1 are provided with slots 23 that cooperate with the mounting plates 24. After the crushing baffle 5 is engaged by the mounting plates 24 and the slots 23, if the crushing baffle 5 is deformed due to long-term impact and needs to be replaced, the crushing baffle 5 can be directly removed.

[0044] It should be noted that even if the crushing baffle 5 is deformed, it can still crush coal by impact, and the replacement frequency is low. At the same time, since the coal is crushed in advance, the crushing load on the roller 4 is reduced, and the wear of the roller 4 is reduced, thus ensuring the efficient operation of the entire machine.

[0045] In some specific implementation plans, such as Figure 3 As shown, the screening mechanism also includes an inclined screen plate 7 and an arc-shaped receiving plate 9. The higher side of the inclined screen plate 7 is aligned with the lower side of the crushing and rotating mechanism and smoothly connected to the arc-shaped receiving plate 9. The inclined screen plate 7 is fixedly set relative to the inner wall of the processing box 1. The coal crushed by the crushing and rotating mechanism falls onto the inclined screen plate 7 and then slides down the inclined screen plate 7. Screening is achieved during the sliding process. The coal that does not pass through slides down to the position of the arc-shaped receiving plate 9. The recycling and conveying mechanism is set between the arc-shaped receiving plate 9 and the crushing and rotating mechanism.

[0046] The recycling and conveying mechanism includes a conveyor belt 10, drive wheels 11, and scrapers 12. Two drive wheels 11 are provided, one near the location of the arc-shaped receiving plate 9, and the other near the top of the rolling column 4. Both drive wheels 11 are rotatably connected to the inner wall of the processing box 1 via a rotating shaft. The conveyor belt 10 is connected between the two drive wheels 11. Multiple scrapers 12 are provided and evenly distributed along the conveyor belt 10. The scrapers 12 are perpendicular to the surface of the conveyor belt 10 and are fixedly installed. The scrapers 12 are configured to cooperate with the arc-shaped receiving plate 9, meaning that when each scraper 12 passes the location of the drive wheel 11 near the arc-shaped receiving plate 9, the end of the scraper 12 contacts the arc-shaped receiving plate 9, scraping away the coal falling on the arc-shaped receiving plate 9. The conveyor belt 10 is conveyed upwards. A transition guide plate 8 is provided on one side of the top of the conveyor belt 10. The transition guide plate 8 is used to guide the coal pushed by the scraper 12 of the conveyor belt 10 to the crushing and rotating mechanism for further crushing. The transition guide plate 8 also cooperates with the throwing plate 15. Multiple crushing protrusions 14 are evenly distributed on the side of the throwing plate 15 near the transition guide plate 8. Whenever the throwing plate 15 deflects away from the crushing baffle 5, the throwing plate 15 presses against the transition guide plate 8. In this way, when the conveyor belt 10 conveys the coal that has not been fully crushed to the transition guide plate 8, the rotating throwing plate 15 uses the crushing protrusions 14 to squeeze the coal on the transition guide plate 8, so that the coal that is about to fall back onto the crushing and rotating mechanism is further crushed in advance. This can reduce the crushing load of the crushing and rotating mechanism and reduce wear.

[0047] In some specific implementations, the missing gear 19 and the transmission wheel 11 on the side near the top of the rolling column 4 are both coaxially fixedly connected to a synchronous wheel 20, and a synchronous belt 21 is connected between the two synchronous wheels 20. When the rolling column 4, the corresponding transmission gear 17 and the missing gear 19 rotate synchronously, the synchronous wheel 20 and the synchronous belt 21 work together to drive the transmission wheel 11 to rotate, thereby making the conveyor belt 10 run without separate control.

[0048] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios:

[0049] First, the coal to be crushed is continuously conveyed from the top of the processing box 1 by the feeding conveyor belt mechanism 2, and the coal falls into the V-shaped clamp formed by the auxiliary baffle 16 and the throwing plate 15.

[0050] During the rotation of the crushing column 4, the transmission gear 17 coaxially connected to one of the crushing columns 4 drives the missing gear 19 to rotate synchronously. When the effective tooth portion of the missing gear 19 rotates to below the linkage gear 22, the two mesh with each other. Then, the missing gear 19 drives the linkage gear 22 to rotate, and the linkage gear 22 drives the throwing plate 15 to deflect away from the crushing baffle 5 through the connecting shaft 26. During this process, the coil spring tightens and generates a rebound force. As the throwing plate 15 rotates in the direction of coil spring tightening, the coal slides into the spherical grooves 13 distributed on the surface of the throwing plate 15. After the missing gear 19 rotates a certain angle, its missing position coincides with the linkage gear 22. At this time, the linkage gear 22 has no rotational thrust, that is, the missing gear 19 and the linkage gear 22 separate. Then, the coil spring releases its rebound force instantly, so that the throwing plate 15 quickly rebounds and resets, making it easier to throw the caught coal onto the crushing baffle 5. The coal blocks are initially crushed by hitting the crushing baffle 5, and then fall between the crushing columns 4 for further crushing. This process is repeated to avoid the crushing columns 4 directly crushing larger coal, reduce its crushing load, and thus reduce wear.

[0051] The coal, after being thrown and initially crushed, falls between the two crushing columns 4 for further crushing, and then falls onto the inclined screen plate 7. It then slides down the inclined screen plate 7, where it is screened. Coal that does not pass through slides down to the location of the arc-shaped receiving plate 9.

[0052] During the rotation of the missing gear 19, it drives the transmission wheel 11 to rotate through the cooperation of the synchronous pulley 20 and the synchronous belt 21, thereby making the conveyor belt 10 run. The conveyor belt 10 scrapes up the coal that has not passed the screening on the arc receiving plate 9 through the scraper 12 and conveys it upward. Finally, the conveyed coal falls on the transition guide plate 8 and then slides down between the two crushing columns 4 along the transition guide plate 8, which is convenient for further crushing.

[0053] It should be noted that whenever the throwing plate 15 deflects away from the crushing baffle 5, the throwing plate 15 presses against the transition guide plate 8. Thus, when the conveyor belt 10 transports the coal that has not been sufficiently crushed to the transition guide plate 8, the rotating throwing plate 15 relies on the crushing convex ball 14 to squeeze the coal on the transition guide plate 8, so that the coal that is about to fall back between the two crushing columns 4 is further crushed in advance. This can reduce the crushing load of the crushing rotation mechanism, reduce wear, and improve the crushing effect.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency wear-resistant coal crushing and screening all-in-one machine, comprising a processing box and a feeding conveyor belt mechanism, the inside of the processing box is provided with a crushing rotating mechanism for crushing coal, characterized in that, The high-efficiency wear-resistant coal crushing and screening integrated machine further comprises: A throwing and crushing mechanism is arranged between the feeding conveyor belt mechanism and the crushing rotating mechanism, and comprises a rotating throwing mechanism and a crushing baffle. The rotating throwing mechanism is used for throwing the coal conveyed by the feeding conveyor belt mechanism onto the crushing baffle for crushing. A screening mechanism is used for screening the coal crushed by the crushing rotating mechanism. The screening mechanism comprises a recycling conveying mechanism, which is used for recycling and conveying the screened coal that is blocked to the upper part of the crushing rotating mechanism for re-crushing treatment. The crushing rotating mechanism comprises two rolling columns arranged in the processing box in cooperation with each other, two transmission gears coaxially arranged with the two rolling columns, wherein the surface of each rolling column is circumferentially distributed with a protruding tooth, the protruding teeth on the surfaces of the two rolling columns are intertwined with each other, the two transmission gears are engaged with each other and located outside the processing box, and the outside of the processing box is further fixedly installed with a driving motor for driving one of the transmission gears to rotate through a mounting seat. The rotating throwing mechanism is arranged below the discharge end of the feeding conveyor belt mechanism and comprises an integrated throwing plate and an auxiliary baffle. The side of the auxiliary baffle away from the throwing plate is upwardly bent and raised, and a V-shaped structure is formed between the auxiliary baffle and the throwing plate. The crushing baffle is arranged on one side of the throwing plate. One side of the connection between the throwing plate and the auxiliary baffle is fixedly connected with a connecting shaft rotationally connected with the inner wall of the processing box, and a coil spring is arranged between the connecting shaft and the inner wall of the processing box. An intermittent transmission mechanism is arranged between the connecting shaft and one of the transmission gears. The intermittent transmission mechanism comprises a linkage gear and a missing gear. The linkage gear is coaxially fixedly connected with the connecting shaft, and the missing gear is coaxially fixedly connected with one of the transmission gears and cooperates with the linkage gear. The screening mechanism further comprises an inclined sieve plate and a circular arc material collecting plate. The higher side of the inclined sieve plate is aligned below the crushing rotating mechanism, and the lower side of the inclined sieve plate is fixedly connected with the circular arc material collecting plate. The recycling conveying mechanism is arranged between the circular arc material collecting plate and the crushing rotating mechanism. The recycling conveying mechanism comprises a conveyor belt body, transmission wheels and scrapers. The transmission wheels are arranged in two numbers and are rotationally connected with the inner wall of the processing box. The conveyor belt body is connected between the two transmission wheels. The scrapers are arranged in multiple numbers and are equidistantly distributed along the conveyor belt body. The scrapers are arranged in cooperation with the circular arc material collecting plate. When each scraper passes through the position of the transmission wheel close to the circular arc material collecting plate, the end of the scraper is in contact with the circular arc material collecting plate. A transition guide plate is arranged on one side of the top of the conveyor belt body and is used for guiding the coal pushed by the conveyor belt body through the scrapers to the crushing rotating mechanism. The transition guide plate cooperates with the throwing plate. The side of the throwing plate close to the transition guide plate is uniformly distributed with multiple crushing convex balls. The missing gear is coaxially fixedly connected with a synchronous wheel on the transmission wheel near the upper side of the rolling column, and a synchronous belt is connected between the two synchronous wheels.

2. The high-efficiency wear-resistant coal crushing and screening all-in-one machine according to claim 1, characterized in that, The throwing plate is uniformly provided with a plurality of ball-shaped grooves on the side facing the crushing baffle.

3. The high-efficiency wear-resistant coal crushing and screening all-in-one machine according to claim 1, characterized in that, The crushing baffle is uniformly provided with a plurality of conical protrusions on the side facing the throwing plate.

4. The high-efficiency wear-resistant coal crushing and screening all-in-one machine according to claim 1, characterized in that, The crushing baffle is uniformly provided with a plurality of conical protrusions on the side facing the throwing plate. The crushing baffle is uniformly provided with a plurality of conical protrusions on the side facing the throwing plate.

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