Efficient wear-resistant fire coal crushing and screening all-in-one machine

Abstract

The invention belongs to the technical field of coal crushing and screening, and particularly relates to an efficient wear-resistant fire coal crushing and screening all-in-one machine which comprises a processing box and a feeding conveying belt mechanism, and a crushing rotating mechanism used for crushing fire coal, a throwing crushing mechanism and a screening mechanism are arranged in the processing box. The throwing and crushing mechanism is arranged between the feeding conveying belt mechanism and the crushing and rotating mechanism in a matched mode. The screening mechanism is used for screening the coal crushed by the crushing and rotating mechanism; coal falling into the processing box is received through a combination body of the throwing plate and the auxiliary baffle, every time the throwing plate deflects, the correspondingly arranged coil springs are tightened to store force, and after the throwing plate deflects by a certain angle, the elastic force is released, so that the received coal is conveniently and rapidly thrown onto the crushing baffle to be preliminarily crushed, and the crushing efficiency is improved. Initial force and gravity in the coal throwing process are used for primary impact crushing, so that the load of the coal crushed by the rolling column is reduced, and the abrasion is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of coal crushing and screening, and in particular relates to a high-efficiency wear-resistant coal crushing and screening integrated machine. Background Art

[0002] The coal raw materials used in coal-fired power plants need to be crushed before they are burned in order to ensure the combustion effect. Therefore, crushing equipment is needed to crush them, and in order to ensure the crushing effect, the crushed coal materials also need to be screened.

[0003] The existing coal raw material crushing and screening are integrated in a set of equipment. The equipment generally uses pairs of rotating crushing rollers to crush the coal. According to the crushing needs, the crushing rollers are generally set to multiple levels, and then the crushed coal is screened through a screening filter or filter plate. Those that do not meet the requirements are sent back to the crushing position for crushing again.

[0004] However, the existing coal raw material crushing and screening equipment directly crushes large pieces of coal raw materials through rotating crushing rollers and other components. Therefore, the crushing roller will bear a large load when it starts to crush. The rolling and friction between the coarse particles or large pieces of coal are relatively strong, which can easily cause a certain degree of wear on the crushing roller, affecting its use, and the crushing effect will deteriorate over time. Furthermore, when the crushing roller and other components are worn to a certain extent and need to be replaced, since they are located inside the equipment and are large in size, it is not convenient to disassemble and maintain the worn crushing roller as a whole. Therefore, it is necessary to reduce the wear rate of the crushing roller, thereby reducing the maintenance frequency. Summary of the invention

[0005] The purpose of the present invention is to provide an efficient and wear-resistant coal crushing and screening integrated machine to solve the technical problem in the prior art that when coal raw material crushing and screening equipment directly squeezes and crushes coal materials through components such as crushing rollers, wear easily occurs, affecting use.

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

[0007] The high-efficiency wear-resistant coal crushing and screening integrated machine comprises a processing box and a feeding conveyor belt mechanism, wherein a crushing and rotating mechanism for crushing coal is arranged inside the processing box, and further comprises:

[0008] A throwing and crushing mechanism, wherein the throwing and crushing mechanism is arranged between the feeding conveyor belt mechanism and the crushing rotating mechanism, and the throwing and crushing mechanism comprises a rotating throwing mechanism and a crushing baffle, and 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 crushed by the crushing and rotating mechanism. The screening mechanism includes a recovery and conveying mechanism, which is used to recover the coal blocked by the screening and convey it to the top of the crushing and rotating mechanism for re-crushing.

[0010] Preferably, the crushing and rotating mechanism includes two rolling columns arranged inside the processing box for rotating in cooperation with each other, and two transmission gears arranged coaxially with the two rolling columns, wherein each of the rolling columns has circumferentially distributed convex teeth on the surface, the convex teeth on the surfaces of the two rolling columns are intertwined with each other, the two transmission gears are meshed with each other and are simultaneously located outside the processing box, and a driving motor for driving one of the transmission gears to rotate is also fixedly installed on the outside of the processing box through a mounting seat.

[0011] More preferably, the rotating throwing mechanism is located below the discharge end of the feed conveyor belt mechanism, and the rotating throwing mechanism includes a throwing plate and an auxiliary baffle that are integrally connected, the auxiliary baffle is bent upward on the side away from the throwing plate, 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, and a connecting shaft that is rotatably connected to the inner wall of the processing box is fixedly connected to one side of the connection between the throwing plate and the auxiliary baffle, and a disc spring is arranged between the connecting shaft and the inner wall of the processing box, and an intermittent transmission mechanism is arranged 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 fixedly connected to the connecting shaft, the missing gear is coaxially fixedly connected to one of the transmission gears, and the missing gear cooperates with the linkage gear.

[0013] Furthermore, a plurality of spherical grooves are evenly distributed on one side of the throwing plate facing the crushing baffle.

[0014] Furthermore, a plurality of conical protrusions are evenly distributed on a side of the crushing baffle facing the throwing plate.

[0015] Preferably, both sides of the crushing baffle are fixedly connected with mounting clamps, and both sides of the processing box are provided with clamping grooves matching with the mounting clamps.

[0016] Furthermore, the screening mechanism also includes an inclined screen plate and an arc receiving plate. The higher side of the inclined screen plate is aligned below the crushing and rotating mechanism, and the lower side of the inclined screen plate is fixedly connected to the arc receiving plate. The recovery and conveying mechanism is cooperatively arranged between the arc receiving plate and the crushing and rotating mechanism.

[0017] Furthermore, the recovery conveying mechanism includes a conveyor belt body, a transmission wheel and a scraper. There are two transmission wheels, and the two transmission wheels are rotatably connected to the inner wall of the processing box. The conveyor belt body is cooperatively connected between the two transmission wheels. There are multiple scrapers, and they are equidistantly distributed along the conveyor belt body. The scraper is cooperated with an arc receiving plate. When each scraper passes the position of the transmission wheel close to the arc receiving plate, the end of the scraper just contacts the arc receiving plate. A transition guide plate is provided on one side of the top of the conveyor belt body. The transition guide plate is used to guide the coal pushed by the conveyor belt body through the scraper to the crushing rotating mechanism. The transition guide plate also cooperates with a throwing plate, and a plurality of crushing convex balls are evenly distributed on a side of the throwing plate close to the transition guide plate.

[0018] Preferably, the missing gear and the transmission wheel on the upper side of the rolling column are both coaxially fixedly connected with a synchronous wheel, and a synchronous belt is cooperatively connected between the two synchronous wheels.

[0019] The beneficial effects of the present invention are:

[0020] The present invention catches the coal that falls into the processing box through the combination of the throwing plate and the auxiliary baffle plate, and during the rotation of the rolling column, the rolling column drives the throwing plate to rotate intermittently through the cooperation of the transmission gear and the missing gear. Whenever the throwing plate is deflected, the correspondingly arranged disc spring is tightened and stored, and the elastic force is released after the deflection to a certain angle, so that the caught coal can be quickly thrown onto the crushing baffle plate for initial crushing, that is, the coal is initially impacted and crushed by relying on the inertia force and gravity during the throwing process, so that the coal load for crushing and processing by the rolling column is reduced, thereby reducing wear.

[0021] In addition, the present invention screens the coal crushed by the rolling columns through the inclined screen plate, and the coal that has not passed through the inclined screen plate slides onto the arc receiving plate. The running conveyor belt relies on the scraper to scrape up the coal on the arc receiving plate, and then transports it again between the two rolling columns. During the transportation process, the coal is guided by the transition guide plate, and the throwing plate that deflects and accumulates force during the guiding process is squeezed onto the transition guide plate, and the coal that has not been screened and is about to enter between the rolling columns is crushed again in advance, thereby ensuring the crushing and screening effect and reducing the wear of the rolling columns.

[0022] On this basis, in the process of the present invention driving the crushing column to rotate and crush the coal through the cooperation of two transmission gears, one of the transmission gears drives the throwing plate to swing back and forth through the missing gear and the linkage gear, and also drives the conveyor belt body to run through the synchronous wheel and the synchronous belt. There is no need to separately control the rotation of the conveyor belt body and the throwing plate. It can ensure that only the operation of the crushing column is controlled to realize the linkage of the conveyor belt body and the throwing plate, thereby improving the convenience of operation settings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0025] Figure 2 It is a structural schematic diagram of the relative position distribution of the rolling column, the crushing baffle and the throwing plate in the present invention;

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

[0027] Figure 4 It is a structural schematic diagram of the rotary throwing mechanism in the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the transmission gear, the missing gear and the linkage gear in the present invention;

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

[0030] Figure 7 It is a schematic diagram of the state of the transition guide plate when the rotation throwing mechanism in the present invention is squeezed during the deflection and force storage process;

[0031] In the figure: 1. processing box; 2. feeding conveyor belt mechanism; 3. discharging inclined guide plate; 4. rolling column; 5. crushing baffle; 6. rotating throwing mechanism; 7. inclined screen plate; 8. transition guide plate; 9. arc receiving plate; 10. conveyor belt body; 11. transmission wheel; 12. scraper; 13. ball groove; 14. crushing convex ball; 15. throwing plate; 16. auxiliary baffle; 17. transmission gear; 18. driving motor; 19. missing gear; 20. synchronous wheel; 21. synchronous belt; 22. linkage gear; 23. slot; 24. mounting card plate; 25. conical protrusion; 26. connecting shaft. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In this technical solution, if Figure 1-3 As shown, the high-efficiency wear-resistant coal crushing and screening integrated machine comprises a processing box 1, a discharging inclined guide plate 3 is fixedly arranged at the bottom of the processing box 1, and a feeding conveyor belt mechanism 2 is fixedly arranged on one side of the top, and the feeding conveyor belt mechanism 2 is horizontally arranged to continuously convey coal from the top of the processing box 1 into the processing box 1; a crushing rotating mechanism for crushing coal is arranged inside the processing box 1, and the integrated machine also includes a throwing crushing mechanism and a screening mechanism;

[0035] The throwing and crushing mechanism is arranged between the feed conveyor belt mechanism 2 and the crushing rotating mechanism. The throwing and crushing mechanism includes a rotating throwing mechanism 6 and a crushing baffle 5. The rotating throwing mechanism 6 is used to throw the coal transported by the feed conveyor belt mechanism 2 onto the crushing baffle 5 for crushing; this can reduce the load of the crushing rotating mechanism and reduce the wear of the crushing rotating mechanism; the screening mechanism is arranged below the crushing rotating mechanism, and is used to screen the coal crushed by the crushing rotating mechanism. The screening mechanism includes a recovery and conveying mechanism, and the recovery and conveying mechanism is used to recover the coal blocked by the screening and convey it to the top of the crushing rotating mechanism for re-crushing.

[0036] In some specific embodiments, in combination Figure 2 and Figure 6As shown, the crushing and rotating mechanism includes two rolling columns 4 that cooperate with each other and are rotatably arranged inside the processing box 1, and two transmission gears 17 that are coaxially arranged with the two rolling columns 4, wherein each rolling column 4 has convex teeth distributed circumferentially on the surface, and the convex teeth on the surfaces of the two rolling columns 4 are intertwined with each other, so as to crush the coal during the rotation of the rolling columns 4. The two transmission gears 17 are meshed with each other and are simultaneously located outside the processing box 1. A driving motor 18 for driving one of the transmission gears 17 to rotate is also fixedly installed on the outside of the processing box 1 through a mounting seat, so as to Figure 2 From the perspective of the angle of view, the two rolling columns 4 are driven to rotate by the driving motor 18, the left rolling column 4 rotates clockwise, and the right rolling column 4 rotates counterclockwise.

[0037] In some specific embodiments, such as Figures 2 to 4 As shown, the rotating throwing mechanism 6 is cooperated to be located below the discharge end of the feed conveyor belt mechanism 2, the rotating throwing mechanism 6 includes a throwing plate 15 and an auxiliary baffle 16 that are integrally connected, and a V-shaped structure is formed between the auxiliary baffle 16 and the throwing plate 15, and the crushing baffle 5 is cooperated to be arranged on one side of the throwing plate 15. It should be noted that in order to ensure that the coal falls between the two rolling columns 4 after being thrown and crushed, the relative positions of the crushing baffle 5, the rotating throwing mechanism 6 and the rolling column 4 can be adjusted, so that the rotating throwing mechanism 6 is as close as possible to the bottom of the feed conveyor belt mechanism 2, the crushing baffle 5 is as close as possible to between the two rolling columns 4, and one side of the connection between the throwing plate 15 and the auxiliary baffle 16 is fixedly connected to the processing box 1, and a coil spring is arranged between the connecting shaft 26 and the inner wall of the processing box 1. The initial position of the throwing plate 15 is a vertical position. At this time, the coil spring is in the original state and no rebound force is generated. When the throwing plate 15 rotates counterclockwise relying on the connecting shaft 26, the coil spring generates a rebound force, and releases the rebound force after rotating to the corresponding position, and the throwing plate 15 rotates quickly. The side of the auxiliary baffle 16 away from the throwing plate 15 is bent upward and tilted. When the feeding conveyor belt mechanism 2 transports the coal to the inside of 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 arranged between the connecting shaft 26 and one of the transmission gears 17.

[0038] Among them, Figure 5 As shown, the intermittent transmission mechanism includes a linkage gear 22 and a missing gear 19 , the linkage gear 22 is coaxially fixedly connected to the connecting shaft 26 , the missing gear 19 is coaxially 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 Figure 5The perspective shown in the figure shows that if the missing gear 19 is coaxially fixedly connected with the transmission gear 17 on the right, the missing gear 19 can be directly meshed with the linkage gear 22 after rotating a certain angle, driving the linkage gear 22 to rotate clockwise. If the missing gear 19 is coaxially fixedly connected with the transmission gear 17 on the left, a gear is added between the missing gear 19 and the linkage gear 22 for transition transmission to ensure that the linkage gear 22 rotates clockwise. In this way, when the drive motor 18 drives the transmission gear 17 to rotate, so that the rolling column 4 inside the processing box 1 rotates, the missing gear 19 rotates synchronously. When the effective tooth body part of the missing gear 19 rotates to the bottom of the linkage gear 22, the two mesh with each other, and then the missing gear 19 rotates to the bottom of the linkage gear 22. 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. The coil spring is tightened to generate a rebound force. At this time, the coal transported by the feed conveyor belt mechanism 2 falls on 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 thrust in the rotation direction, and then the coil spring instantly releases the rebound force, so that the throwing plate 15 rebounds and resets quickly, making it easier to throw the received coal toward the crushing baffle 5, so that the coal block hits the crushing baffle 5 and is initially crushed, and then falls between the crushing columns 4 for further crushing and crushing, and so on.

[0040] It should be noted that whenever the throwing plate 15 rotates to a vertical position, the auxiliary baffle 16 is located below to catch the continuously falling coal, and then when the throwing plate 15 deflects again, it is convenient to guide the caught coal to slide onto the throwing plate 15 for easy throwing.

[0041] In some specific implementation schemes, in order to facilitate the throwing plate 15 to effectively throw the coal, a plurality of spherical grooves 13 are evenly distributed on the side of the throwing plate 15 facing the crushing baffle 5. When the throwing plate 15 is deflected to allow the coil spring to accumulate force, the coal that slides onto the throwing plate 15 is retained by the spherical grooves 13, facilitating subsequent throwing.

[0042] In some specific embodiments, in order to facilitate the crushing of coal that hits the crushing baffle 5, a plurality of conical protrusions 25 are evenly distributed on the side of the crushing baffle 5 facing the throwing plate 15. When the coal is thrown onto the crushing baffle 5, the crushing effect is enhanced by relying on the tip of the conical protrusion 25.

[0043] In some specific embodiments, such as Figure 5 As shown, both sides of the crushing baffle 5 are fixedly connected with mounting clamps 24, and both sides of the processing box 1 are provided with card slots 23 that cooperate with the mounting clamps 24. After the crushing baffle 5 is clamped together by the mounting clamps 24 and the card 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 the crushing baffle 5 can still crush the coal by impact even if it is deformed, and the replacement frequency is low. At the same time, since the coal is crushed in advance, the crushing load of the crushing column 4 is reduced, and the wear of the crushing column 4 is reduced, so the efficient operation of the entire machine can be guaranteed.

[0045] In some specific embodiments, such as Figure 3 As shown, the screening mechanism also includes an inclined screen plate 7 and an arc receiving plate 9. The higher side of the inclined screen plate 7 is aligned below the crushing and rotating mechanism, and the lower side of the inclined screen plate 7 is smoothly connected to the arc receiving plate 9, and the inclined screen plate 7 is fixed relative to the inner wall of the processing box 1. The coal crushed by the crushing and rotating mechanism falls on the inclined screen plate 7, and then slides down along the inclined screen plate 7. Screening is achieved during the sliding process, and the coal that has not passed the sliding slides to the position of the arc receiving plate 9. The recovery and conveying mechanism is cooperatively arranged between the arc receiving plate 9 and the crushing and rotating mechanism.

[0046] Among them, the recovery conveying mechanism includes a conveyor belt body 10, a transmission wheel 11 and a scraper 12. There are two transmission wheels 11, one of which is close to the position of the circular arc receiving plate 9, and the other is close to the position on the upper side of the rolling column 4. The two transmission wheels 11 are rotatably connected to the inner wall of the processing box 1 through a rotating shaft. The conveyor belt body 10 is connected between the two transmission wheels 11. There are multiple scrapers 12, which are evenly distributed along the conveyor belt body 10. The scrapers 12 are perpendicular to the surface of the conveyor belt body 10 and are fixedly arranged. The scrapers 12 are arranged in cooperation with the circular arc receiving plate 9, that is, when each scraper 12 passes the position of the transmission wheel 11 close to the circular arc receiving plate 9, the end of the scraper 12 just contacts the circular arc receiving plate 9, and the coal falling on the circular arc receiving plate 9 is scraped off the belt The coal is transported upwards; a transition guide plate 8 is arranged on one side of the top of the conveyor belt body 10. The transition guide plate 8 is used to guide the coal pushed by the conveyor belt body 10 through the scraper 12 to the crushing rotating mechanism, so as to facilitate crushing again. The transition guide plate 8 is also matched with the throwing plate 15. A plurality of crushing convex balls 14 are evenly distributed on the side of the throwing plate 15 close to the transition guide plate 8. Whenever the throwing plate 15 deflects away from the crushing baffle 5, the throwing plate 15 is pressed against the transition guide plate 8. In this way, when the conveyor belt body 10 transports the coal that is not fully crushed to the transition guide plate 8, the rotating throwing plate 15 relies on the crushing convex balls 14 to squeeze the coal on the transition guide plate 8, so that the coal that is about to fall back onto the crushing rotating mechanism is further crushed in advance, which can reduce the crushing load of the crushing rotating mechanism and reduce wear.

[0047] In some specific embodiments, the missing gear 19 and the transmission wheel 11 on the side above the rolling column 4 are coaxially fixedly connected with 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 cooperate to drive the transmission wheel 11 to rotate, thereby making the conveyor belt body 10 operate without the need for separate control.

[0048] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

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

[0050] During the rotation of the rolling column 4, the transmission gear 17 coaxially connected to one of the rolling columns 4 drives the missing gear 19 to rotate synchronously. When the effective tooth body part of the missing gear 19 rotates to below the linkage gear 22, the two mesh with each other, and 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 is tightened to generate a rebound force, and when the throwing plate 15 rotates in the direction of the tightening of the coil spring, the coal slides into the spherical groove 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 thrust in the rotation direction, that is, the missing gear 19 is separated from the linkage gear 22, and then the disc spring instantly releases the rebound force, so that the throwing plate 15 rebounds quickly and resets, so that it is convenient to throw the received coal to the crushing baffle 5, so that the coal block hits the crushing baffle 5 and is initially crushed, and then falls between the crushing columns 4 for further crushing and crushing, and so on and so forth, thereby avoiding the crushing column 4 from directly crushing larger coal, reducing its crushing load, and thus reducing wear.

[0051] The coal that is initially broken by throwing falls between the two rolling columns 4, is further broken, and then falls onto the inclined screen plate 7, and then slides down along the inclined screen plate 7. Screening is achieved during the sliding process, and the coal that does not pass through slides to the position of the arc 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 wheel 20 and the synchronous belt 21, so that the conveyor belt body 10 can operate. The conveyor belt body 10 scrapes up the coal that has not passed the screening on the arc receiving plate 9 through the scraper 12 and transports it upward. Finally, the transported coal falls on the transition guide plate 8, and then slides along the transition guide plate 8 to between the two rolling columns 4, so as to facilitate crushing again.

[0053] It should be noted that whenever the throwing plate 15 deflects away from the crushing baffle 5, the throwing plate 15 presses toward the transition guide plate 8. In this way, when the conveyor belt 10 transports the insufficiently crushed coal to the transition guide plate 8, the rotating throwing plate 15 relies on the crushing convex balls 14 to squeeze the coal on the transition guide plate 8, so that the coal that is about to fall back between the two rolling columns 4 is further crushed in advance. This can reduce the crushing load of the crushing rotating mechanism, reduce wear, and improve the crushing effect.

[0054] Finally, it should be noted that the above 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 aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An efficient and wear-resistant coal crushing and screening integrated machine, comprising a processing box and a feeding conveyor belt mechanism, wherein a crushing and rotating mechanism for crushing coal is arranged inside the processing box, characterized in that: The high-efficiency wear-resistant coal-fired crushing and screening integrated machine also includes: A throwing and crushing mechanism, wherein the throwing and crushing mechanism is arranged between the feeding conveyor belt mechanism and the crushing rotating mechanism, and the throwing and crushing mechanism comprises a rotating throwing mechanism and a crushing baffle, and the rotating throwing mechanism is used to throw the coal conveyed by the feeding conveyor belt mechanism onto the crushing baffle for crushing; The screening mechanism is used to screen the coal crushed by the crushing and rotating mechanism. The screening mechanism includes a recovery and conveying mechanism, which is used to recover the coal blocked by the screening and convey it to the top of the crushing and rotating mechanism for re-crushing.

2. The high-efficiency wear-resistant coal crushing and screening integrated machine according to claim 1 is characterized in that: The crushing and rotating mechanism includes two rolling columns that are arranged inside the processing box and rotate in cooperation with each other, and two transmission gears that are coaxially arranged with the two rolling columns, wherein each of the rolling columns has circumferentially distributed convex teeth on the surface, and the convex teeth on the surfaces of the two rolling columns are intertwined with each other. The two transmission gears are meshed with each other and are located outside the processing box at the same time. A driving motor for driving one of the transmission gears to rotate is also fixedly installed on the outside of the processing box through a mounting seat.

3. The high-efficiency wear-resistant coal crushing and screening integrated machine according to claim 2 is characterized in that: The rotating throwing mechanism is located below the discharge end of the feed conveyor belt mechanism, and includes an integrally connected throwing plate and an auxiliary baffle. The auxiliary baffle is bent upward on the side away from the throwing plate, 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, and one side of the connection between the throwing plate and the auxiliary baffle is fixedly connected to a connecting shaft rotatably connected to the inner wall of the processing box, and a disc spring is arranged between the connecting shaft and the inner wall of the processing box, and an intermittent transmission mechanism is arranged between the connecting shaft and one of the transmission gears.

4. The high-efficiency wear-resistant coal crushing and screening integrated machine according to claim 3 is characterized in that: The intermittent transmission mechanism comprises a linkage gear and a missing gear, wherein the linkage gear is coaxially fixedly connected to the connecting shaft, the missing gear is coaxially fixedly connected to one of the transmission gears, and the missing gear matches the linkage gear.

5. The high-efficiency wear-resistant coal crushing and screening integrated machine according to claim 3 is characterized in that: A plurality of spherical grooves are evenly distributed on one side of the throwing plate facing the crushing baffle.

6. The high-efficiency wear-resistant coal crushing and screening integrated machine according to claim 1 is characterized in that: A plurality of conical protrusions are evenly distributed on one side of the crushing baffle plate facing the throwing plate.

7. The high-efficiency wear-resistant coal crushing and screening integrated machine according to claim 1 is characterized in that: Both sides of the crushing baffle are fixedly connected with mounting clamps, and both sides of the processing box are provided with clamping grooves matched with the mounting clamps.

8. The high-efficiency wear-resistant coal crushing and screening integrated machine according to claim 4 is characterized in that: The screening mechanism also includes an inclined screen plate and an arc receiving plate. The higher side of the inclined screen plate is aligned below the crushing and rotating mechanism, and the lower side of the inclined screen plate is fixedly connected to the arc receiving plate. The recovery and conveying mechanism is cooperatively arranged between the arc receiving plate and the crushing and rotating mechanism.

9. The high-efficiency wear-resistant coal crushing and screening integrated machine according to claim 8 is characterized in that: The recovery conveying mechanism includes a conveyor belt body, a transmission wheel and a scraper. There are two transmission wheels, and the two transmission wheels are rotatably connected to the inner wall of the processing box. The conveyor belt body is connected between the two transmission wheels. There are multiple scrapers, which are evenly distributed along the conveyor belt body. The scraper is arranged in cooperation with an arc receiving plate. When each scraper passes the position of the transmission wheel close to the arc receiving plate, the end of the scraper just contacts the arc receiving plate. A transition guide plate is arranged on one side of the top of the conveyor belt body. The transition guide plate is used to guide the coal pushed by the conveyor belt body through the scraper to the crushing rotating mechanism. The transition guide plate also cooperates with a throwing plate, and a plurality of crushing convex balls are evenly distributed on one side of the throwing plate close to the transition guide plate.

10. The high-efficiency wear-resistant coal crushing and screening integrated machine according to claim 8, characterized in that: The missing gear and the transmission wheel on the upper side of the rolling column are both coaxially fixedly connected with a synchronous wheel, and a synchronous belt is cooperatively connected between the two synchronous wheels.

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