Automatic reject bulk material discharge port filter screen and method of use

Abstract

The application relates to the technical field of filtering screens, in particular to an automatic large-block material removing discharging port filtering screen and a using method thereof, which comprises a crusher, a conveying pipe and a material pouring machine. A screening assembly is arranged below the material pouring machine. The screening assembly comprises a screening machine frame. A lower auxiliary filtering screen is arranged on the inner side of the screening machine frame. A pressure transmission mechanism is welded to the upper end of the screening machine frame. A synchronous vibration frame is welded to the upper end of the pressure transmission mechanism. An upper vibration screen is arranged on the inner side of the synchronous vibration frame. A flap assembly is rotatably connected to the inner side of the synchronous vibration frame. The pressure transmission mechanism comprises a deformation frame. Two clamping blocks are clamped on the deformation frame. A reset spring is fixedly connected between the two clamping blocks. In the application, a pressure sensor and an automatic execution mechanism are created. Large-block materials accumulated on each layer of screen are guided to a preset inclined plate. Finally, the large-block materials are automatically returned to the crusher through an inclined conveying belt for secondary crushing, so that planned shutdown caused by cleaning of the screen is avoided.

Description

Technical Field

[0001] This invention relates to the field of filter screen technology, specifically to an automatic filter screen for rejecting large pieces of material at the feed inlet and its usage method. Background Technology

[0002] A filter screen is a mechanical device that uses a screen to classify materials by particle size. Its working principle is to use screens with different apertures to allow materials smaller than the aperture to pass through, while materials larger than the aperture are intercepted, thereby achieving classification, impurity removal, or solid-liquid separation. Common filter screens include vibrating screens, rotary vibrating screens, and drum screens.

[0003] The vibrating screen consists of a screen box, screen mesh, vibrator and damping spring. It generates high-frequency vibration through the excitation device, causing the material to jump forward on the screen surface, thereby quickly completing the grading. It has the characteristics of large processing capacity, high screening efficiency and stable operation. The vibrating screen can be equipped with single or multiple screen meshes as needed, and can realize multi-level screening of materials in one go.

[0004] However, during the continuous operation of the vibrating screen, large pieces of material that cannot pass through will gradually accumulate on the screen surface. This not only increases the screen load, causing its weight to exceed the set threshold, but also hinders the screening process, resulting in decreased processing efficiency, increased energy consumption, and abnormal wear or failure of the equipment. If the machine is stopped for manual cleaning, it will significantly affect the continuity of production. Therefore, in order to address the above problems, an automatic material rejection filter screen for the feed inlet and its usage method are proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic filter screen for rejecting large pieces of material at the feed inlet and its usage method, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automatic material rejection filter screen for large materials and its usage method are disclosed, comprising a crusher, a conveying pipe, and a discharge machine. A screening assembly is located below the discharge machine. The screening assembly includes a screening frame, with a lower auxiliary filter screen installed inside the frame. A pressure transmission mechanism is welded to the upper end of the screening frame, and a synchronous vibration frame is welded to the upper end of the pressure transmission mechanism. An upper vibrating screen is installed inside the synchronous vibration frame, and a flap assembly is rotatably connected inside the synchronous vibration frame. The pressure transmission mechanism includes a deformation frame with two locking blocks. A return spring is fixedly connected between the two locking blocks. A push rod is welded to the outside of the locking blocks, and the push rod forms a rotating pair with a transmission rod via bolts. A fixed plate is fixedly connected through the transmission rod, and a sliding cap is slidably fitted onto the outside of the transmission rod. A compression spring is welded between the fixed plate and the sliding cap. A short rod is welded to one end of the transmission rod.

[0008] As a further optimization of the present invention, the crusher is connected to the inside of the feeder through a conveying pipe, the feeder outlet is located directly above the upper vibrating screen, a horizontal conveyor belt is provided at the bottom of the screening assembly, an inclined conveyor belt is placed on one side of the screening assembly, and a portion of the inclined conveyor belt is located directly above the crusher opening.

[0009] As a further optimization of the present invention, the screening frame includes a vibrating frame, an inclined plate is welded to the inner side of the vibrating frame, a feeding hopper is welded to one side of the vibrating frame, a vibrating frame is installed at the bottom of the vibrating frame, and a vibrating motor connected to the vibrating frame is installed inside the vibrating frame.

[0010] As a further optimization of the present invention, the inclined plate is located below the lower auxiliary filter screen, the inclined plate and the lower auxiliary filter screen form the same angle with the horizontal plane, and the inclined plate is positioned directly above the discharge hopper.

[0011] As a further optimization of the present invention, the lower auxiliary filter screen and the upper vibrating screen are parallel to each other, and the projections of the lower auxiliary filter screen and the upper vibrating screen in the vertical direction are exactly the same, and the projection of the synchronous vibration frame in the vertical direction is U-shaped.

[0012] As a further optimization of the present invention, the following features are provided: multiple flap assemblies are provided, and the multiple flap assemblies are evenly and equidistantly distributed in a linear array at the bottom end of the upper vibrating screen, and a belt is sleeved on the outside of the flap assemblies.

[0013] As a further optimization of the present invention, the flap assembly includes a shaft, which is fixedly connected to two pulleys and a strip plate. The two pulleys are symmetrically distributed at both ends of the strip plate, and the shaft and the strip plate are coaxially arranged.

[0014] As a further optimization of the present invention, the deformable frame is in the shape of a parallelogram, and the side of the sliding cap away from the compression spring is in close contact with the inner side of the deformable frame.

[0015] As a further optimization of the present invention, a portion of the transmission rod is inserted and passes through the deformation frame, one end of the transmission rod is arc-shaped, and the included angle between the short rod and the transmission rod is 90°.

[0016] A method for using an automatic material rejection filter screen at the feed inlet:

[0017] Step 1: Installation of each component of the device: Place the crusher and the feeder in the planned positions, connect the crusher and the feeder with the conveying pipe, then move the screening assembly directly below the feeder's discharge port, then thread the horizontal conveyor belt through the vibrating frame and place it at the bottom of the screening assembly, so that one end of the horizontal conveyor belt is directly below the feed hopper, and finally place the inclined conveyor belt on one side of the screening assembly, so that part of the inclined conveyor belt is below the inclined plate and part is above the crusher opening;

[0018] Step 2: The device filters the material: Simultaneously start the inclined conveyor belt, horizontal conveyor belt and vibrating motor to pour the material onto the inclined conveyor belt. After being conveyed by the inclined conveyor belt, the material falls into the crusher. After being initially crushed by the crusher, it is conveyed to the unloading machine through the conveying pipe. Then, it is poured from the unloading machine onto the upper vibrating screen installed in the synchronous vibrating frame. After being filtered by the upper vibrating screen, the material falls from the synchronous vibrating frame onto the lower auxiliary filter screen. After being filtered again by the lower auxiliary filter screen, it falls onto the bottom surface of the inner side of the vibrating frame and slides into the hopper. From the hopper, it falls onto the horizontal conveyor belt and is conveyed away.

[0019] Step 3: Self-cleaning activated when the upper vibrating screen becomes clogged and the weight exceeds the set threshold: Some materials that were not thoroughly crushed by the crusher fall onto the upper vibrating screen in the synchronous vibrating frame via the discharge machine. Materials that cannot pass through the screen holes of the upper vibrating screen will accumulate on the surface of the upper vibrating screen. The upper vibrating screen is pressed down by the gravity of the materials, which in turn presses down on the transmission mechanism. At this time, the deformation frame deforms, causing two locking blocks to approach and squeeze the reset spring. The locking blocks drive the push rod to push the transmission rod. The transmission rod pushes the sliding cap through the compression spring. As the compression spring is compressed, the transmission rod and the sliding cap gradually... As the transmission rod passes through the deformation frame, it drives the short rod to extend outward. At the same time, when the upper vibrating screen moves the synchronous vibrating frame downward, the synchronous vibrating frame will also drive the flip plate assembly and belt to move downward. When the outer side of the belt comes into contact with the short rod and friction occurs, the movement of the short rod will drive the belt to rotate around the pulley. The rotation of the pulley will drive the strip plate to rotate through the shaft, causing multiple adjacent strip plates to flip and close. The incompletely crushed material on the upper vibrating screen is shaken off and received by the strip plate before falling onto the inclined plate. Finally, it slides onto the inclined conveyor belt and is then conveyed by the inclined conveyor belt before falling into the crusher.

[0020] Step 4: Shaking off material when the lower auxiliary filter screen is clogged: When material passing through the upper vibrating screen falls onto the lower auxiliary filter screen, material that cannot pass through the screen holes of the lower auxiliary filter screen will accumulate on the lower auxiliary filter screen. The lower auxiliary filter screen is shaken by the vibrating motor according to the vibration frame, and the material will be shaken onto the inclined plate with a certain angle to the lower auxiliary filter screen, and finally slide onto the inclined conveyor belt, and then fall into the crusher after being conveyed by the inclined conveyor belt.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In this invention, a pressure sensing and automatic execution mechanism is created by setting a screening component, which guides the large pieces of material accumulated on each layer of screen to a preset inclined plate, and finally returns them to the crusher for secondary crushing through an inclined conveyor belt. This avoids unplanned downtime caused by cleaning the screen and transforms the discrete and intermittent production mode into a truly continuous assembly line operation.

[0023] 2. In this invention, through a purely mechanical intelligent response mechanism and precise grading and cyclic screening of materials, the raw materials are fully crushed and utilized, which not only avoids material waste but also ensures the uniformity of particle size of the final product. This improves the utilization rate of raw materials while reducing the burden of processing unqualified materials at the back end.

[0024] 3. The automatic cleaning mechanism introduced in this invention removes accumulated material in real time and automatically, keeping the screen in a good working state close to the design load. This greatly protects the screen and the vibration system, while also helping to reduce system energy consumption. From the perspective of system operation, it simplifies the operation process, and the cumulative energy saving effect is considerable over long-term operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the screening assembly structure of the present invention;

[0027] Figure 3 This is an exploded view of the screening assembly of the present invention;

[0028] Figure 4 This is a schematic diagram of the screening frame structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the installation position structure of the vibration motor of the present invention;

[0030] Figure 6 This is a schematic diagram of the pressure transmission mechanism of the present invention;

[0031] Figure 7 for Figure 3 Enlarged structural diagram at point A in the middle;

[0032] Figure 8 This is a schematic diagram of the flip-plate assembly structure of the present invention.

[0033] In the diagram: 1. Crusher; 2. Conveying pipe; 3. Discharger;

[0034] 4. Screening assembly;

[0035] 41. Screening machine frame; 411. Vibrating frame; 412. Inclined plate; 413. Feed hopper; 414. Vibrating frame; 415. Vibrating motor;

[0036] 42. Lower auxiliary filter screen;

[0037] 43. Pressure transmission mechanism; 431. Deformation frame; 432. Locking block; 433. Return spring; 434. Push rod; 435. Transmission rod; 436. Fixed plate; 437. Sliding cap; 438. Compression spring; 439. Short rod;

[0038] 44. Synchronous vibrating frame; 45. Upper vibrating screen;

[0039] 46. ​​Flip plate assembly; 461. Shaft; 462. Pulley; 463. Strip plate; 47. Belt; 5. Horizontal conveyor belt; 6. Inclined conveyor belt. Detailed Implementation

[0040] Please see Figures 1-8 The present invention provides a technical solution:

[0041] An automatic material rejection filter screen for large materials and its usage method include a crusher 1, a conveying pipe 2, and a discharge machine 3. A screening assembly 4 is installed below the discharge machine 3. The screening assembly 4 includes a screening frame 41, a lower auxiliary filter screen 42 installed inside the screening frame 41, a pressure transmission mechanism 43 welded to the upper end of the screening frame 41, a synchronous vibration frame 44 welded to the upper end of the pressure transmission mechanism 43, an upper vibrating screen 45 installed inside the synchronous vibration frame 44, and a flap assembly 46 rotatably connected inside the synchronous vibration frame 44. The force transmission mechanism 43 includes a deformation frame 431, on which two locking blocks 432 are clamped. A return spring 433 is fixedly connected between the two locking blocks 432. A push rod 434 is welded to the outside of the locking blocks 432. The push rod 434 forms a rotating pair with the transmission rod 435 through bolts. A fixed plate 436 is fixedly connected through the transmission rod 435. A sliding cap 437 is slidably sleeved on the outside of the transmission rod 435. A compression spring 438 is welded between the fixed plate 436 and the sliding cap 437. A short rod 439 is welded to one end of the transmission rod 435.

[0042] As a further implementation of this scheme, the inside of the crusher 1 is connected to the inside of the feeder 3 through the conveying pipe 2. The discharge port of the feeder 3 is located directly above the upper vibrating screen 45. A horizontal conveyor belt 5 is set at the bottom of the screening assembly 4, and an inclined conveyor belt 6 is placed on one side of the screening assembly 4. A part of the inclined conveyor belt 6 is located directly above the opening of the crusher 1. The material can be fed into the crusher 1 through the inclined conveyor belt 6. The material after the initial crushing by the crusher 1 can be sent into the screening assembly 4 through the conveying pipe 2 and the feeder 3 for screening. The qualified and unqualified materials are conveyed separately through the horizontal conveyor belt 5 and the inclined conveyor belt 6, respectively. The part conveyed by the inclined conveyor belt 6 will be recycled back into the crusher 1.

[0043] As a further implementation of this solution, the screening frame 41 includes a vibrating frame 411, an inclined plate 412 welded to the inner side of the vibrating frame 411, a feeding hopper 413 welded to one side of the vibrating frame 411, a vibrating frame 414 installed at the bottom of the vibrating frame 411, and a vibrating motor 415 connected to the vibrating frame 411 installed inside the vibrating frame 414. The inclined plate 412 is located below the lower auxiliary filter screen 42, and the inclined plate 412 and the lower auxiliary filter screen 42 form the same angle with the horizontal plane. The inclined plate 412 is set directly above the feeding hopper 413. The design of the relative position of the inclined plate 412 and the lower auxiliary filter screen 42 makes it possible for materials that cannot pass through the lower auxiliary filter screen 42 and remain on its surface to be shaken off onto the inclined plate 412 parallel to it due to its inclined setting, and slide off the inclined plate 412, thereby achieving the effect of diversion.

[0044] As a further implementation of this scheme, the lower auxiliary filter screen 42 and the upper vibrating screen 45 are parallel to each other, and the projections of the lower auxiliary filter screen 42 and the upper vibrating screen 45 in the vertical direction are exactly the same. The projection of the synchronous vibration frame 44 in the vertical direction is U-shaped. The parallel arrangement of the lower auxiliary filter screen 42 and the upper vibrating screen 45 forms a double-layer filter barrier, which improves the conveying efficiency and ensures the continuity of conveying and filtering.

[0045] As a further implementation of this solution, multiple flap assemblies 46 are provided. These multiple flap assemblies 46 are evenly and equidistantly distributed in a linear array at the bottom of the upper vibrating screen 45. A belt 47 is sleeved on the outside of each flap assembly 46. Each flap assembly 46 includes a shaft 461, which is fixedly connected to two pulleys 462 and a strip plate 463. The two pulleys 462 are symmetrically distributed at both ends of the strip plate 463. The shaft 461 and the strip plate 463 are coaxially arranged. This coaxial arrangement allows the pulleys 462 to rotate more stably through the shaft 461 when they rotate due to the friction of the belt 47.

[0046] As a further implementation of this solution, the deformation frame 431 is parallelogram in shape. The side of the sliding cap 437 away from the compression spring 438 is in close contact with the inner side of the deformation frame 431. A portion of the transmission rod 435 is inserted and passes through the deformation frame 431. One end of the transmission rod 435 is arc-shaped. The angle between the short rod 439 and the transmission rod 435 is 90°. The shape design of the deformation frame 431 allows it to deform to a certain extent when the upper end is compressed, so that the two locking blocks 432 on it change their relative positions as they deform. While the two locking blocks 432 compress the return spring 433 to deform and accumulate elastic potential energy, they also drive the transmission rod 435 to move through the push rod 434. The movement of the transmission rod 435 allows the short rod 439 to generate a frictional force in a predetermined vector direction when it comes into contact with the other components.

[0047] Workflow: Place the crusher 1 and the dumper 3 according to the planned positions, and connect the crusher 1 and the dumper 3 using the conveying pipe 2. Next, move the screening assembly 4 directly below the discharge port of the dumper 3. Then, thread the horizontal conveyor belt 5 through the vibrating frame 414 and place it at the bottom of the screening assembly 4, so that one end of the horizontal conveyor belt 5 is directly below the discharge hopper 413. Finally, place the inclined conveyor belt 6 on one side of the screening assembly 4, so that part of the inclined conveyor belt 6 is below the inclined plate 412 and part is above the opening of the crusher 1. Simultaneously start the inclined conveyor belt 6, the horizontal conveyor belt 5, and the vibrating motor 415 to dump the material on the inclined conveyor belt 6. The material, after being conveyed by the inclined conveyor belt 6, falls into the crusher 1. After being initially crushed by the crusher 1, it is conveyed through the conveyor pipe 2 to the unloading machine 3, and then poured from the unloading machine 3 onto the upper vibrating screen 45 installed in the synchronous vibrating frame 44. The material filtered by the upper vibrating screen 45 falls from the synchronous vibrating frame 44 onto the lower auxiliary filter screen 42, and is filtered again by the lower auxiliary filter screen 42, falling onto the inner bottom surface of the vibrating frame 411 and sliding into the discharge hopper 413. From the discharge hopper 413, it falls onto the horizontal conveyor belt 5 and is transported away. Some material that is not thoroughly crushed by the crusher 1 falls through the unloading machine 3. When material is placed on the upper vibrating screen 45 in the synchronous vibrating frame 44, material that cannot pass through the screen holes of the upper vibrating screen 45 will accumulate on the upper surface of the upper vibrating screen 45. The upper vibrating screen 45 is pressed down by the gravity of the material, which presses down on the transmission mechanism 43. At this time, the deformation frame 431 deforms, causing the two locking blocks 432 to approach and squeeze the return spring 433. The locking blocks 432 drive the push rod 434 to push the transmission rod 435. The transmission rod 435 pushes the sliding cap 437 through the compression spring 438. As the compression spring 438 is compressed, the transmission rod 435 and the sliding cap 437 gradually approach each other. The part of the transmission rod 435 that passes through the deformation frame 431 drives the short rod 439 outward. As the upper vibrating screen 45 moves the synchronous vibrating frame 44 downward, the synchronous vibrating frame 44 will also move the flip plate assembly 46 and belt 47 downward. When the outer side of the belt 47 comes into contact with the short rod 439 and generates friction, the movement of the short rod 439 will cause the belt 47 to rotate around the pulley 462. The rotation of the pulley 462 drives the strip plate 463 to rotate through the shaft 461, causing multiple adjacent strip plates 463 to flip and close. The incompletely crushed material on the upper vibrating screen 45 is shaken off and received by the strip plate 463 before falling onto the inclined plate 412, and finally slides onto the inclined conveyor belt 6. After being conveyed by the inclined conveyor belt 6, it falls into the crusher 1.When material passing through the upper vibrating screen 45 falls onto the lower auxiliary filter screen 42, material that cannot pass through the screen holes of the lower auxiliary filter screen 42 will accumulate on the lower auxiliary filter screen 42. The lower auxiliary filter screen 42 is then vibrated by the vibrating motor 415 according to the vibration frame 411, causing the material to fall onto the inclined plate 412, which has a certain angle with the lower auxiliary filter screen 42. Finally, the material slides onto the inclined conveyor belt 6, and after being conveyed by the inclined conveyor belt 6, it falls into the crusher 1.

[0048] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. An automatic filter screen for removing large pieces of material from the feed inlet, comprising a crusher (1), a conveying pipe (2), and a discharger (3), characterized in that: Below the feeding machine (3) is a screening assembly (4), which includes a screening frame (41). A lower auxiliary filter screen (42) is installed inside the screening frame (41). A pressure transmission mechanism (43) is welded to the upper end of the screening frame (41). A synchronous vibration frame (44) is welded to the upper end of the pressure transmission mechanism (43). An upper vibrating screen (45) is installed inside the synchronous vibration frame (44). A flip plate assembly (46) is rotatably connected inside the synchronous vibration frame (44). The pressure transmission mechanism (43) includes a deformation frame (431), on which two locking blocks (432) are mounted. A return spring (433) is fixedly connected between the two locking blocks (432). A push rod (434) is welded to the outside of the locking blocks (432). The push rod (434) forms a rotating pair with the transmission rod (435) by bolts. A fixed plate (436) is fixedly connected through the transmission rod (435). A sliding cap (437) is slidably mounted on the outside of the transmission rod (435). A compression spring (438) is welded between the fixed plate (436) and the sliding cap (437). A short rod (439) is welded to one end of the transmission rod (435).

2. The automatic large-piece material rejection filter screen according to claim 1, characterized in that: The inside of the crusher (1) is connected to the inside of the feeder (3) through the conveying pipe (2). The discharge port of the feeder (3) is located directly above the upper vibrating screen (45). A horizontal conveying belt (5) is provided at the bottom of the screening assembly (4). An inclined conveying belt (6) is placed on one side of the screening assembly (4). A part of the inclined conveying belt (6) is located directly above the opening of the crusher (1).

3. The automatic large-piece material rejection filter screen according to claim 1, characterized in that: The screening frame (41) includes a vibrating frame (411), an inclined plate (412) is welded to the inner side of the vibrating frame (411), a feeding hopper (413) is welded to one side of the vibrating frame (411), a vibrating frame (414) is installed at the bottom of the vibrating frame (411), and a vibrating motor (415) connected to the vibrating frame (411) is installed inside the vibrating frame (414).

4. The automatic large-piece material rejection filter screen according to claim 3, characterized in that: The inclined plate (412) is located below the lower auxiliary filter screen (42). The inclined plate (412) and the lower auxiliary filter screen (42) form the same angle with the horizontal plane. The inclined plate (412) is positioned directly above the feed hopper (413).

5. The automatic large-piece material rejection filter screen according to claim 1, characterized in that: The lower auxiliary filter screen (42) and the upper vibrating screen (45) are parallel to each other, and the projections of the lower auxiliary filter screen (42) and the upper vibrating screen (45) in the vertical direction are exactly the same. The projection of the synchronous vibration frame (44) in the vertical direction is U-shaped.

6. The automatic large-piece material rejection filter screen according to claim 1, characterized in that: Multiple flap assemblies (46) are provided, and the multiple flap assemblies (46) are evenly and equidistantly distributed in a linear array at the bottom of the upper vibrating screen (45). A belt (47) is sleeved on the outside of the flap assembly (46).

7. The automatic large-piece material rejection filter screen according to claim 6, characterized in that: The flap assembly (46) includes a shaft (461), which is fixedly connected to two pulleys (462) and a strip plate (463). The two pulleys (462) are symmetrically distributed at both ends of the strip plate (463), and the shaft (461) and the strip plate (463) are coaxial.

8. The automatic large-piece material rejection filter screen according to claim 1, characterized in that: The deformable frame (431) is parallelogram in shape, and the side of the sliding cap (437) away from the compression spring (438) is in close contact with the inner side of the deformable frame (431).

9. The automatic large-piece material rejection filter screen according to claim 1, characterized in that: Part of the transmission rod (435) is inserted and passes through the deformation frame (431). One end of the transmission rod (435) is arc-shaped. The included angle between the short rod (439) and the transmission rod (435) is 90°.

10. A method for using an automatic material rejection filter screen at the feed inlet according to any one of claims 1-9, characterized in that: S1: Installation of each component of the device: Place the crusher (1) and the feeder (3) in the planned positions, connect the crusher (1) and the feeder (3) using the conveying pipe (2), then move the screening assembly (4) directly below the discharge port of the feeder (3), then insert the horizontal conveyor belt (5) through the vibrating frame (414) and place it at the bottom of the screening assembly (4), so that one end of the horizontal conveyor belt (5) is directly below the feed hopper (413), and finally place the inclined conveyor belt (6) on one side of the screening assembly (4), so that part of the inclined conveyor belt (6) is below the inclined plate (412) and part is above the opening of the crusher (1); S2: The device filters the material: Simultaneously start the inclined conveyor belt (6), the horizontal conveyor belt (5) and the vibrating motor (415) to pour the material onto the inclined conveyor belt (6). After being conveyed by the inclined conveyor belt (6), the material falls into the crusher (1). After being initially crushed by the crusher (1), it is conveyed to the pouring machine (3) through the conveying pipe (2). Then, it is poured from the pouring machine (3) onto the upper vibrating screen (45) installed in the synchronous vibrating frame (44). After being filtered by the upper vibrating screen (45), the material will fall from the synchronous vibrating frame (44) onto the lower auxiliary filter screen (42). After being filtered again by the lower auxiliary filter screen (42), it falls onto the inner bottom surface of the vibrating frame (411) and slides into the hopper (413). It then falls onto the horizontal conveyor belt (5) through the hopper (413) and is conveyed away. S3: Self-cleaning is activated when the weight of the upper vibrating screen (45) exceeds the set threshold due to blockage: When some materials that are not thoroughly crushed by the crusher (1) fall onto the upper vibrating screen (45) in the synchronous vibrating frame (44) through the feeder (3), the materials that cannot pass through the screen holes of the upper vibrating screen (45) will accumulate on the upper surface of the upper vibrating screen (45). The upper vibrating screen (45) is pressed down by the gravity of the materials on the pressure transmission mechanism (43). At this time, the deformation frame (431) deforms and drives the two blocks (432) to approach and squeeze the reset spring (433). The blocks (432) drive the push rod (434) to push the transmission rod (435). The transmission rod (435) pushes the sliding cap (437) through the compression spring (438). As the compression spring (438) is compressed, the transmission rod (435) and the sliding cap (437) gradually approach each other. The part of the moving rod (435) that passes through the deformation frame (431) drives the short rod (439) to extend outward. At the same time, when the upper vibrating screen (45) drives the synchronous vibrating frame (44) to move down, the synchronous vibrating frame (44) will also drive the flip plate assembly (46) and belt (47) to move down. When the outer side of the belt (47) comes into contact with the short rod (439) and friction occurs, the movement of the short rod (439) will drive the belt (47) to rotate around the pulley (462). The rotation of the pulley (462) drives the strip plate (463) to rotate through the shaft (461), causing multiple adjacent strip plates (463) to flip and close. The material that is not completely crushed on the upper vibrating screen (45) is shaken off and then received by the strip plate (463) and falls onto the inclined plate (412), and finally slides onto the inclined conveyor belt (6). After being conveyed by the inclined conveyor belt (6), it falls into the crusher (1). S4: Shaking off material when the lower auxiliary filter screen (42) is blocked: When the material passing through the upper vibrating screen (45) falls onto the lower auxiliary filter screen (42), the material that cannot pass through the screen holes of the lower auxiliary filter screen (42) will accumulate on the lower auxiliary filter screen (42). The lower auxiliary filter screen (42) is shaken by the vibrating motor (415) according to the vibration frame (411), and the material will be shaken onto the inclined plate (412) with a certain angle to the lower auxiliary filter screen (42), and finally slide onto the inclined conveyor belt (6), and after being conveyed by the inclined conveyor belt (6), it falls into the crusher (1).

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