A multi-tooth roller classifying crushing device

Abstract

The present application relates to the technical field of crushing device, and provides a multi-tooth roller grading crushing device, which comprises a crushing box body, a hopper and a drying mechanism, the drying mechanism comprises swing plates and air supply pipes, the swing plates are divided into two groups and are respectively located at the inner walls of the two sides of the hopper, the swing plates can swing and move away from the inner walls of the hopper to form a zigzag feeding channel in the hopper, and the air supply pipes are used for connecting external hot air supply units and supplying hot air above the swing plates. Through the swing plates which can swing to form a zigzag feeding channel in the hopper and the air supply pipes which supply hot air, the moisture content of the material is reduced, the adhesion of the material is reduced, and the possibility of the material adhering and accumulating on the tooth roller is reduced. Through the above technical scheme, the technical problem that there is no means to process the moisture and adhesion of the material itself to reduce the possibility of subsequent adhesion and accumulation on the tooth roller is solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of crushing devices, in particular, to a multi-tooth roller grading crushing device. BACKGROUND

[0002] Coal, as one of the important energy resources in the world, occupies an indispensable position in many fields such as industrial production, power supply and resident life. With the continuous development of the coal industry, the performance requirements of material crushing equipment are increasingly improved.

[0003] In the coal industry, toothed roll crushers are widely used in crushing operations of raw coal, washed coal, gangue, bauxite and other materials. Toothed roll crushers mainly crush large pieces of material into small pieces of the required size by extruding, shearing and splitting the material through the crushing teeth on the toothed roll. When facing some wet and sticky materials, due to the adhesion of wet and sticky materials, the material is easily adhered and accumulated between adjacent crushing teeth on the toothed roll during the crushing process, gradually forming material clumps, affecting the effective crushing of subsequent materials by the crushing teeth, and possibly causing the toothed roll to rotate poorly.

[0004] To solve this problem, some online cleaning devices currently exist in the industry, which usually use scrapers, brushes and other components to remove the material adhered to the toothed roll by directly contacting and scraping the surface of the toothed roll to maintain normal operation of the equipment. Although these cleaning devices can alleviate the problem of material adhesion and accumulation to some extent, they all clean the material that has adhered to the toothed roll, and lack effective means to treat the wet and sticky material itself to reduce the possibility of subsequent adhesion and accumulation on the toothed roll.

[0005] Therefore, it has become an important issue in the coal and related industries to develop a multi-tooth roller grading crushing device that can start from the characteristics of wet and sticky materials to reduce the possibility of material adhesion and accumulation on the toothed roll. SUMMARY

[0006] To overcome the above-mentioned defects, embodiments of the present application provide a multi-tooth roller grading crushing device, which solves the technical problem in the related art that there is a lack of means to treat wet and sticky materials themselves to reduce the possibility of subsequent adhesion and accumulation on the toothed roll.

[0007] According to one aspect, at least one embodiment of the present application provides a multi-tooth roller grading crushing device, comprising a crushing box body, a hopper and a drying mechanism, the crushing box body has a feed inlet and a discharge outlet, the hopper is arranged at the top of the crushing box body and communicates with the feed inlet;

[0008] The drying mechanism comprises swing plates and a gas supply pipe, the swing plates are multiple and swingly arranged on the inner wall of the hopper, the multiple swing plates are divided into two groups and located on the two inner walls of the hopper respectively, and the multiple swing plates can swing vertically and away from the inner wall of the hopper to form a zigzag feeding channel in the hopper.

[0009] The swing plates are provided with a plurality of air outlet holes, the gas supply pipe is arranged on the bottom surface of the swing plate and communicates with the plurality of air outlet holes, and the gas supply pipe is used for communicating with an external hot air supply unit and supplying hot air above the swing plate through the air outlet holes.

[0010] For example, the multi-tooth roller grading crushing device provided by at least one embodiment of the present application further comprises:

[0011] The swing plates are provided with limiting columns on both sides, the two side walls of the hopper are provided with a plurality of arc-shaped sliding grooves, and the plurality of limiting columns are arranged in one-to-one correspondence through the plurality of arc-shaped sliding grooves and are in sliding cooperation with the arc-shaped sliding grooves.

[0012] The two driving plates are symmetrically arranged on the outside of the hopper and slide, each driving plate corresponds to a group of swing plates, the driving plate is provided with a driving sliding groove, the limiting columns of the swing plates in the same group are in sliding cooperation with the driving sliding grooves of the driving plate, and the swing plates can swing vertically by means of the sliding cooperation of the limiting columns and the driving sliding grooves when the driving plates slide.

[0013] The hopper is provided with a bidirectional screw rod outside the hopper, the two driving plates are respectively threadedly connected to the two ends of the bidirectional screw rod, and the bidirectional screw rod can drive the two driving plates to slide towards each other or away from each other.

[0014] For example, the multi-tooth roller grading crushing device provided by at least one embodiment of the present application further comprises:

[0015] The swing plates are provided with a plurality of air outlet holes, the gas supply pipe is arranged on the bottom surface of the swing plate and communicates with the plurality of air outlet holes, and the gas supply pipe is used for communicating with an external hot air supply unit and supplying hot air above the swing plate through the air outlet holes.

[0016] For example, the multi-tooth roller grading crushing device provided by at least one embodiment of the present application further comprises:

[0017] A pair of coarse crushing rollers and a pair of fine crushing rollers are arranged in the crushing box, the coarse crushing rollers and the fine crushing rollers are arranged in an upper and lower interval, and are used for sequentially coarsely crushing and finely crushing the material.

[0018] For example, the multi-tooth roller grading crushing device provided by at least one embodiment of the present application further comprises:

[0019] A screen plate capable of vibrating is arranged between the coarse crushing roller and the fine crushing roller, the screen plate gradually decreases in height from the middle to both sides, and the screen plate can screen the material output by the coarse crushing roller, so that the material with a particle size smaller than the screen hole size of the screen plate falls between the two fine crushing rollers for fine crushing, and the material with a particle size larger than the screen hole size of the screen plate is guided to the gap between the fine crushing roller and the crushing box body.

[0020] The discharge port includes a fine material discharge port and a coarse material discharge port, the fine material discharge port is located below the gap between the two fine crushing rollers and is used for receiving the fine material crushed by the two fine crushing rollers, and the coarse material discharge port is located below the gap between the fine crushing roller and the crushing box body and is used for receiving the coarse material screened out by the screen plate.

[0021] For example, the multi-tooth roller grading crushing device provided by at least one embodiment of the present application further comprises:

[0022] Symmetrical guide plates inclined to adjacent sides are arranged below the screen plate, and the guide plates are used for guiding the material screened and fallen by the screen plate to the two fine crushing rollers for fine crushing.

[0023] For example, the multi-tooth roller grading crushing device provided by at least one embodiment of the present application further comprises:

[0024] A material distribution plate is arranged in the middle of the screen plate, and the material distribution plate is used for distributing the coarse material crushed by the coarse crushing roller to both sides of the screen plate.

[0025] For example, the multi-tooth roller grading crushing device provided by at least one embodiment of the present application further comprises:

[0026] A plurality of crushing teeth on the two coarse crushing rollers are arranged in an axial staggered manner, the material distribution plate is arranged in the middle of the screen plate in a vertical sliding manner, a plurality of flexible scrapers are arranged at the top end of the material distribution plate, the plurality of flexible scrapers are in the form of combs and correspond to the plurality of crushing teeth on the two coarse crushing rollers one by one.

[0027] The plurality of flexible scrapers can be driven by the material distribution plate to move upward and alternately flexibly abut the crushing teeth on the two coarse crushing rollers to clean the tooth gaps of the crushing teeth.

[0028] For example, the multi-tooth roller grading crushing device provided by at least one embodiment of the present application further comprises:

[0029] Both side walls of the crushing box body have lifting sliding grooves, the end portion of the material distribution plate is arranged in the lifting sliding grooves in a sliding manner, and the end portion of the material distribution plate is connected with a linear driving member used for driving the material distribution plate to lift.

[0030] For example, the multi-tooth roller grading crushing device provided by at least one embodiment of the present application further comprises:

[0031] The side wall of the crushing box body is hinged with a plurality of box doors horizontally corresponding to the coarse crushing roller or the fine crushing roller, and a telescopic member is arranged between the crushing box body and the box doors to drive the opening and closing of the box doors.

[0032] The embodiment of the present application has the following beneficial effects:

[0033] In the present application, when the device detects that the wet and sticky material needs to be processed, the swing plate swings away from the inner wall of the hopper under the action of external force, thereby forming a fold line-shaped feeding channel. The fold line-shaped feeding channel increases the conveying length of the material in the hopper without increasing the occupied space of the hopper, thereby providing more time for the contact and drying of the material and hot air.

[0034] The hot air generated by the external hot air supply unit is transported to the bottom surface of the swing plate through the air supply pipe and then sprayed out from the air outlet holes on the swing plate to flow upward to the material area above the swing plate. The hot air contacts the material and carries away the moisture on the surface of the material, thereby realizing the pre-drying of the material. At the same time, because the material falls back and forth between multiple swing plates and constantly stirs, the hot air can more uniformly contact each part of the material, thereby further improving the drying effect.

[0035] By arranging the swing plate capable of swinging to form a fold line-shaped feeding channel in the hopper and combining with the design of the air supply pipe to transport hot air, the drying of the wet and sticky material is realized. The fold line-shaped feeding channel increases the contact time of the material and hot air, and the stirring of the material enables the hot air to more comprehensively contact the material, thereby reducing the water content of the material and its stickiness, and reducing the possibility of the material adhering and accumulating on the tooth roller from the source. After the pre-drying treatment, the wet and sticky material can reduce the adhesion and accumulation on the tooth roller after entering the crushing box body, thereby improving the crushing efficiency and crushing quality. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some example embodiments of the present application. Other drawings can be obtained by those skilled in the art according to the content of the example embodiments of the present application and the drawings without paying creative labor.

[0037] Figure 1 FIG. 1 is a structural schematic diagram of a multi-tooth roller grading crushing device according to an embodiment of the present application;

[0038] Figure 2 FIG. 1 is a structural schematic diagram of a multi-tooth roller grading crushing device according to an embodiment of the present application; Figure 1A schematic diagram of the hopper structure in the embodiment;

[0039] Figure 3 for Figure 2 Enlarged view at point B in the middle;

[0040] Figure 4 for Figure 1 A schematic diagram of the internal structure of the hopper in the embodiment;

[0041] Figure 5 for Figure 1 A schematic diagram of the swing plate in the embodiment;

[0042] Figure 6 for Figure 5 Enlarged view at point C;

[0043] Figure 7 for Figure 1 A schematic diagram of the internal structure of the crushing chamber in the embodiment;

[0044] Figure 8 for Figure 1 A schematic diagram of the sieve plate in the embodiment;

[0045] Figure 9 for Figure 8 Enlarged view at point D;

[0046] Figure 10 for Figure 1 A schematic diagram of the material distribution plate in the embodiment;

[0047] Figure 11 for Figure 1 A schematic diagram of the crushing tooth structure of the coarse crushing roller in the embodiment;

[0048] Figure 12 for Figure 1 Enlarged view of point A in the middle.

[0049] In the diagram: 1. Crushing box, 2. Hopper, 3. Drying mechanism, 101. Feed inlet, 102. Discharge outlet, 4. Swing plate, 5. Air supply pipe, 401. Air outlet, 402. Limiting post, 201. Arc-shaped chute, 6. Drive plate, 601. Drive chute, 7. Bidirectional screw, 8. Buffer plate, 9. Buffer spring, 801. Vent hole, 10. Coarse crushing roller, 11. Fine crushing roller, 12. Screen plate, 1021. Fine material outlet, 1022. Coarse material outlet, 13. Guide plate, 14. Distributor plate, 1001. Crushing teeth, 15. Flexible scraper, 103. Lifting chute, 104. Box door. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0051] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0052] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 present invention.

[0055] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0056] like Figures 1-6The diagram illustrates a multi-toothed roller grading and crushing device according to an embodiment of the present invention, comprising a crushing chamber 1, a hopper 2, and a drying mechanism 3. The crushing chamber 1 has an inlet 101 and a outlet 102. The inlet 101 is located at the top of the chamber, and the outlet 102 is located at the bottom of the chamber for discharging the crushed material. The hopper 2 is located at the top of the crushing chamber 1 and is in close communication with the inlet 101. In the drying mechanism 3, multiple swing plates 4 are oscillatingly disposed on the inner wall of the hopper 2. The multiple swing plates 4 are divided into two groups, located on the inner walls of both sides of the hopper 2. When processing normal materials, the swing plates 4 are attached to the inner wall of the hopper 2, and the equipment operates normally. When processing wet and sticky materials, the swing plates 4 can swing away from the inner wall of the hopper 2 under external force. The multiple swing plates 4 cooperate with each other to form a zigzag feeding channel within the hopper 2. An air supply pipe 5 is located on the bottom surface of the swing plates 4 and communicates with several air outlets 401. One end of the air supply pipe 5 is used to connect to the external hot air supply unit, and the other end extends along the bottom surface of the swing plate 4, so that the hot air can be distributed to each air outlet 401 and hot air is supplied to the top of the swing plate 4.

[0057] Working principle: When the device detects that a wet and sticky material needs to be processed, the swing plate 4 swings under the action of external force, gradually moving away from the inner wall of the hopper 2, thus forming a zigzag feeding channel. The zigzag feeding channel increases the conveying length of the material in the hopper 2 without increasing the space occupied by the hopper 2, providing more time for the material to come into contact with hot air and dry.

[0058] Hot air generated by the external hot air supply unit is delivered to the bottom surface of the oscillating plate 4 through the air supply pipe 5, and then ejected from the air outlet 401 on the oscillating plate 4, flowing upward to the material area above the oscillating plate 4. The hot air comes into contact with the material, removing moisture from the material surface and achieving pre-drying of the material. At the same time, because the material falls back and forth between multiple oscillating plates 4, constantly tumbling, the hot air can more evenly contact all parts of the material, further improving the drying effect.

[0059] By incorporating a swing plate 4 within the hopper 2 that forms a zigzag feeding channel, and combining this with a hot air supply pipe 5, the drying of moist, sticky materials is achieved. The zigzag feeding channel increases the contact time between the material and the hot air, and the tumbling of the material allows the hot air to contact it more comprehensively, thereby reducing the material's moisture content and viscosity, and minimizing the likelihood of material adhering and accumulating on the toothed rollers. The pre-dried moist, sticky material, upon entering the crushing chamber 1, exhibits reduced adhesion and accumulation on the toothed rollers, improving crushing efficiency and quality.

[0060] In some examples, such as Figures 3-6As shown, a limiting post 402 is provided on the swing plate 4, protruding from the side of the swing plate 4. A number of arc-shaped grooves 201 are correspondingly provided on the side wall of the hopper 2. The arc-shaped grooves 201 can accommodate the movement trajectory of the limiting post 402 when the swing plate 4 swings. The limiting post 402 passes through the arc-shaped grooves 201 one by one, and its end protrudes from the side wall of the hopper 2, providing a guiding and limiting function for the swing of the swing plate 4.

[0061] Two drive plates 6 are slidably mounted on the outer wall of the hopper 2. Each drive plate 6 is provided with a drive groove 601. The ends of the limiting posts 402 of the two sets of swing plates 4 are respectively located in the drive grooves 601 of the two drive plates 6. When the drive plate 6 slides, the drive groove 601 provides a thrust to the limiting post 402, thereby driving the swing plate 4 to swing.

[0062] A bidirectional screw 7 is rotatably mounted on the outer wall of the hopper 2, with its two ends threadedly connected to two drive plates 6. The bidirectional screw 7 is driven to rotate by a motor mounted on the outer wall of the hopper 2. Because the threads at both ends of the bidirectional screw 7 are in opposite directions, rotation causes the two drive plates 6 to slide towards or away from each other. When the two drive plates 6 slide towards each other, the drive groove 601 generates a thrust on the limiting post 402, causing the limiting post 402 to slide along the arc-shaped groove 201, which in turn drives the swing plate 4 to swing, forming a zigzag feeding channel.

[0063] A buffer plate 8 is installed on the swing plate 4. The buffer plate 8 is connected to the swing plate 4 through multiple buffer springs 9 to buffer the impact force of falling materials. Several vent holes 801 are provided on the buffer plate 8 to ensure that the hot air blown out from the vent holes 401 of the swing plate 4 can flow normally and make full contact with the materials.

[0064] Working principle: The motor drives the bidirectional screw 7 to rotate, causing the two drive plates 6 to slide towards or away from each other. When the drive plates 6 slide, the drive groove 601 applies force to the limiting post 402. Under the guidance of the arc-shaped groove 201, the limiting post 402 drives the swing plate 4 to swing, realizing the synchronous driving of the swing of multiple swing plates 4, thereby forming a zigzag feeding channel.

[0065] When the material falls from above onto the buffer plate 8, the buffer spring 9 acts as a buffer, absorbing the impact force of the falling material and reducing the direct impact of the material on the swing plate 4, thus protecting the swing plate 4. At the same time, the vent holes 801 on the buffer plate 8 ensure that hot air can pass through the buffer plate 8 and come into contact with the material, thereby drying the material and ensuring that the drying effect is not affected.

[0066] In some examples, such as Figure 7As shown, a pair of coarse crushing rollers 10 and a pair of fine crushing rollers 11 are rotatably arranged inside the crushing chamber 1, with the coarse crushing rollers 10 and fine crushing rollers 11 spaced vertically. The coarse crushing rollers 10 are located at the top and are responsible for the initial crushing of the material entering the crushing chamber 1 from the hopper 2. The fine crushing rollers 11 are located below the coarse crushing rollers 10 and further crush the material after coarse crushing. A screen plate 12 is arranged between the coarse crushing rollers 10 and the fine crushing rollers 11. The height of the screen plate 12 gradually decreases from the middle to both ends, forming a shape that is high in the middle and low at both ends. The screen plate 12 is installed on the inner wall of the crushing chamber 1 by a movable connection, ensuring that the screen plate 12 can move within a certain range. An elastic element, such as a rubber pad, is provided between the screen plate 12 and the inner wall of the crushing chamber 1. At the same time, conventional vibration elements such as a vibrating motor are installed below the screen plate 12.

[0067] Working principle: The material first enters between the coarse crushing rollers 10. The crushing teeth 1001 on the coarse crushing rollers 10 squeeze, shear, and split the material, breaking large pieces into medium-sized particles. After coarse crushing, the material falls onto the screen plate 12, where it is screened. The material that meets the particle size requirements passes through the screen plate 12 and is guided by the guide plate 13 into the fine crushing rollers 11 for further crushing, further reducing the particle size and improving the crushing effect.

[0068] Driven by a vibrating motor, the screen plate 12 vibrates, causing smaller particles that meet the particle size requirements of the fine crushing roller 11 to fall through the screen holes. Guided by the guide plate 13, the material passing through the screen plate 12 is guided between the fine crushing rollers 11 for crushing and then discharged from the fine material outlet 1021 below. The design of the screen plate 12, which is higher in the middle and lower at both ends, causes larger particles that cannot pass through the screen plate 12 and do not meet the processing requirements of the fine crushing roller 11 to roll towards both ends, entering the gap between the fine crushing roller 11 and the crushing chamber 1, and finally falling out from the coarse material outlet 1022 below. This achieves the classification and discharge of materials of different particle sizes, facilitating subsequent targeted processing of the materials.

[0069] The coarse crushing roller 10 and the fine crushing roller 11 crush the material sequentially, achieving graded crushing. This allows the material to gradually reach the required particle size, resulting in better crushing effect and improved particle size uniformity and quality of the product. The screen plate 12 can screen the coarsely crushed material, removing large-diameter materials that do not meet the processing requirements of the fine crushing roller 11. This avoids potential clogging caused by these materials entering the fine crushing roller 11 and ensures the normal operation of the fine crushing roller 11.

[0070] In some examples, such as Figures 7-12As shown, a vertical distribution plate 14 is provided in the middle of the screen plate 12, which can disperse the material output from the coarse crushing roller 10 to both sides of the screen plate 12. Several rings of crushing teeth 1001 on the two coarse crushing rollers 10 are arranged axially staggered. The end of the distribution plate 14 is located in the lifting slide 103, which is used to guide the sliding of the distribution plate 14. Several flexible scrapers 15 are provided at the top of the distribution plate 14. These flexible scrapers 15 are comb-shaped, and their number corresponds to the number of rings of crushing teeth 1001 on the two coarse crushing rollers 10, and they are arranged one-to-one. Several doors 104 are hinged to the side wall of the crushing box 1. The positions of the doors 104 correspond to the coarse crushing roller 10 and the fine crushing roller 11, respectively, which facilitates the operation of maintenance and repair of the coarse crushing roller 10 and the fine crushing roller 11 by the operator. The two ends of the telescopic component are respectively hinged to the outer wall of the crushing box 1 and the doors 104. The telescopic component can be a hydraulic telescopic rod, an electric push rod, etc. When it is necessary to open the box door 104, the telescopic component extends, pushing the box door 104 to rotate around the hinge and open.

[0071] Working principle: The material output from the coarse crushing roller 10 is dispersed to both sides of the screen plate 12 under the action of the distribution plate 14, preventing material from accumulating in the middle area of ​​the screen plate 12. When it is necessary to clean the coarse crushing roller 10, first control the direction of rotation of the coarse crushing roller 10, such as... Figure 7 As shown, of the two coarse crushing rollers 10, the right coarse crushing roller 10 rotates clockwise, while the left coarse crushing roller 10 rotates counterclockwise, allowing the coarse crushing roller 10 to rotate along the inclined direction of its crushing teeth 1001. Then, a linear drive (such as a telescopic cylinder) pushes the distribution plate 14 upward, extending it out of the crushing chamber 1, causing the distribution plate 14 to move upward along the lifting chute 103, which in turn moves the comb-shaped flexible scraper 15 upward, gradually inserting it between the two coarse crushing rollers 10. Since the flexible scraper 15 corresponds one-to-one with the crushing teeth 1001, and the coarse crushing roller 10 rotates along the inclined direction of its crushing teeth 1001, the crushing teeth 1001 can provide a pushing force to the flexible scraper 15 during the slow rotation of the coarse crushing roller 10, causing the flexible scraper 15 to deform and thus abut against the gap between two adjacent rings of crushing teeth 1001 on the opposite coarse crushing roller 10, and finally abut against the outer circumferential surface of the coarse crushing roller 10. As the coarse crushing roller 10 rotates slowly, the flexible scraper 15 scrapes away the material accumulated on the roller surface, thus cleaning the coarse crushing roller 10. After cleaning, the flexible scraper 15, having lost its driving force, returns to its previous shape by pulling down the distribution plate 14 to its original position.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A multi-toothed roller grading and crushing device, characterized in that, It includes a crushing box (1), a hopper (2) and a drying mechanism (3). The crushing box (1) has a feed inlet (101) and a discharge outlet (102). The hopper (2) is located on the top of the crushing box (1) and communicates with the feed inlet (101). The drying mechanism (3) includes a swing plate (4) and an air supply pipe (5). There are multiple swing plates (4), all of which are swinging on the inner wall of the hopper (2). The multiple swing plates (4) are divided into two groups and are located on the inner walls of both sides of the hopper (2). The multiple swing plates (4) can swing vertically and move away from the inner wall of the hopper (2) to form a zigzag feeding channel in the hopper (2). The swing plate (4) is provided with a plurality of air outlets (401). The air supply pipe (5) is located on the bottom surface of the swing plate (4) and connects to the plurality of air outlets (401). The air supply pipe (5) is used to connect to an external hot air supply unit and supply hot air to the top of the swing plate (4) through the air outlets (401). The crushing box (1) is rotatably equipped with a pair of coarse crushing rollers (10) and a pair of fine crushing rollers (11). The coarse crushing rollers (10) and the fine crushing rollers (11) are arranged at intervals above and below each other to crush the material in a coarse and fine manner in sequence. A vibrating screen plate (12) is provided between the coarse crushing roller (10) and the fine crushing roller (11). A material distribution plate (14) is provided in the middle of the screen plate (12). The material distribution plate (14) is used to distribute the coarse material coarsened by the coarse crushing roller (10) to both sides of the screen plate (12). The crushing teeth (1001) on the two coarse crushing rollers (10) are arranged alternately along the axial direction. The material distribution plate (14) is slidably disposed in the middle of the screen plate (12) along the vertical direction. The top of the material distribution plate (14) is provided with several flexible scrapers (15). The several flexible scrapers (15) are comb-shaped and correspond one-to-one with the crushing teeth (1001) on the two coarse crushing rollers (10). Several of the flexible scrapers (15) can move upward under the drive of the material distribution plate (14) and alternately flexibly abut against the crushing teeth (1001) on the two coarse crushing rollers (10) to clean the gaps between the crushing teeth (1001).

2. The multi-toothed roller grading and crushing device according to claim 1, characterized in that, Both sides of the swing plate (4) have limiting posts (402), and the two side walls of the hopper (2) have several arc-shaped sliding grooves (201). Several limiting posts (402) are arranged to pass through several arc-shaped sliding grooves (201) one by one and slide with the arc-shaped sliding grooves (201). Two symmetrically distributed drive plates (6) are slidably arranged on the outside of the hopper (2). Each drive plate (6) corresponds to a set of swing plates (4). The drive plate (6) is provided with a drive groove (601). The limiting post (402) of the swing plate (4) in the same set is slidably engaged with the drive groove (601) of the drive plate (6). The swing plate (4) can swing vertically with the help of the sliding engagement of the limiting post (402) and the drive groove (601) when the drive plate (6) slides. A bidirectional screw (7) is rotatably provided on the outside of the hopper (2), and two drive plates (6) are threaded to the two ends of the bidirectional screw (7). The bidirectional screw (7) can drive the two drive plates (6) to slide towards or away from each other.

3. The multi-toothed roller grading and crushing device according to claim 1, characterized in that, A buffer plate (8) is provided on the swing plate (4), and a plurality of buffer springs (9) are connected between the swing plate (4) and the buffer plate (8). The buffer plate (8) has a plurality of vent holes (801).

4. The multi-toothed roller grading and crushing device according to claim 1, characterized in that, The sieve plate (12) gradually decreases in height from the middle to both sides. The sieve plate (12) can screen the material output by the coarse crushing roller (10) so that the material with a particle size smaller than the sieve hole size of the sieve plate (12) falls between the two fine crushing rollers (11) for fine crushing, and the material with a particle size larger than the sieve hole size of the sieve plate (12) is guided to the gap between the fine crushing roller (11) and the crushing box (1). The discharge port (102) includes a fine material discharge port (1021) and a coarse material discharge port (1022). The fine material discharge port (1021) is located below the gap between the two fine crushing rollers (11) and is used to receive the fine material after being crushed by the two fine crushing rollers (11). The coarse material discharge port (1022) is located below the gap between the fine crushing rollers (11) and the crushing box (1) and is used to receive the coarse material screened out by the screen plate (12).

5. The multi-toothed roller grading and crushing device according to claim 4, characterized in that, The screen plate (12) is symmetrically provided with guide plates (13) inclined to the adjacent side below it. The guide plates (13) are used to guide the material screened off by the screen plate (12) to the two fine crushing rollers (11) for fine crushing.

6. The multi-toothed roller grading and crushing device according to claim 1, characterized in that, The crushing box (1) has lifting grooves (103) on both sides. The end of the material distribution plate (14) is slidably disposed in the lifting groove (103). The end of the material distribution plate (14) is connected to a linear drive component for driving the material distribution plate (14) to rise and fall.

7. The multi-toothed roller grading and crushing device according to claim 1, characterized in that, The side wall of the crushing box (1) is hinged with a number of box doors (104). The number of box doors (104) corresponds horizontally to the coarse crushing roller (10) or the fine crushing roller (11). A telescopic member is provided between the crushing box (1) and the box doors (104). The telescopic member is used to drive the box doors to open and close.

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