Anti-blocking dewatering screen

Abstract

The utility model discloses an anti-blocking dewatering screen, which relates to the technical field of dewatering screens, and can solve the technical problem that the dewatering screen is easy to block, a dewatering screen main body is connected with a dewatering screen power source, and the dewatering screen main body is connected to a base through an elastic support frame; the dewatering screen body is provided with a cover plate, a first dewatering screen is arranged below the cover plate, the tail end of the first dewatering screen is connected with the first discharging port, a second dewatering screen is arranged below the first dewatering screen, the tail end of the second dewatering screen is connected with the second discharging port, and a third discharging port is formed below the second dewatering screen. The cover plate is connected with a first striking device, the first striking device comprises a driving cylinder and a striking head, and the driving cylinder can drive the striking head to strike the first dewatering screen so as to remove materials blocked on the first dewatering screen. The vibrating screen is applied to material dewatering and screening and can effectively clean materials which are strongly adhered to the screen.

Description

Technical Field

[0001] The utility model relates to the technical field of dewatering screens, in particular to an anti-clogging dewatering screen. Background Art

[0002] Dewatering screens primarily dehydrate, desludging, and remove media. They are used for sand washing in aggregate plants, slime recovery in coal preparation plants, and tailings dry discharge in mineral processing plants. However, in actual use, high moisture content, high viscosity, and the presence of numerous fine particles often lead to screen clogging. This problem severely impacts the efficiency of the dewatering screen, the dewatering effect, and the lifespan of the equipment, thereby increasing production costs.

[0003] In the existing technology, although some dewatering screen equipment adopts anti-clogging measures, there are still limitations:

[0004] Chinese patent document CN220424724U discloses an anti-clogging high-frequency vibrating dewatering screen. This system utilizes a cleaning assembly that uses a brush roller to clean the screen, thereby preventing clogging. However, the brush roller suffers from rapid wear, insufficient cleaning force, and difficulty removing materials that adhere strongly to the screen. Furthermore, the brush roller has limited mechanical strength and is prone to damage or deformation when used with hard and viscous materials, impacting cleaning effectiveness and service life.

[0005] Chinese patent CN220026288U discloses an anti-clogging coarse sand dewatering screen. This screen uses a cleaning mechanism that uses a fan motor to drive a brush to clean the sand screening plate to prevent blockage. However, the brush in this cleaning mechanism is ineffective in removing wet materials with strong adhesion or materials stuck in the screen. Furthermore, the lifespan of the brush is also affected by the properties of the material, and frequent brush replacement increases maintenance costs.

[0006] Chinese patent CN218794360U discloses a dewatering screen with an anti-clogging mechanism. This mechanism prevents clogging by providing anti-clogging elements that match the filter holes on the screen. However, this anti-clogging element suffers from mechanical strength deficiencies, making it prone to damage during prolonged operation or when handling high-hardness materials. Furthermore, the anti-clogging element's cleaning effectiveness is limited, preventing it from completely removing some fine particles, thus impacting the overall performance of the dewatering screen.

[0007] In summary, the existing technology still has many shortcomings in solving the problem of dewatering screen blockage, especially when processing viscous water-containing materials, it is unable to effectively clean the materials that strongly adhere to the screen. A new technical solution is urgently needed to improve this situation. Utility Model Content

[0008] In order to solve one or more technical problems in the prior art, the utility model provides an anti-clogging dewatering screen:

[0009] It includes a dewatering screen body, the dewatering screen body is connected to a dewatering screen power source, and the dewatering screen body is connected to a base through an elastic support frame;

[0010] The dewatering screen body is provided with a cover plate, a first dewatering screen is provided below the cover plate, the end of the first dewatering screen is connected to the first discharge port, a second dewatering screen is provided below the first dewatering screen, the end of the second dewatering screen is connected to the second discharge port, and a third discharge port is provided below the second dewatering screen;

[0011] The cover plate is connected to a first striking device, which includes a driving cylinder and a striking head. The driving cylinder can drive the striking head to strike the first dewatering screen to remove materials blocked on the first dewatering screen.

[0012] A second striking device is connected below the first dewatering screen, and the second striking device includes an elastic component and a striking component. The upper end of the elastic component is connected to the bottom of the first dewatering screen, and the lower end of the elastic component is connected to the striking component. The striking component is arranged above the second dewatering screen.

[0013] Preferably, each of the second striking devices includes two elastic components, and the striking component is connected between the two elastic components.

[0014] Preferably, the elastic component is a spring, the striking component is a round roller, and the spring is connected to the roller shaft of the round roller via a connecting piece.

[0015] Preferably, the cover plate is provided with a feed port, and a first dust removal port is provided on one side of the feed port.

[0016] Preferably, a third silo is provided below the third discharge port.

[0017] Preferably, a second dust removal port is provided on one side of the third silo.

[0018] Preferably, it further comprises a dust recovery device, wherein the dust recovery device comprises a dust filter bin, a fan and an exhaust pipe;

[0019] The first dust removal port and / or the second dust removal port are connected to the air inlet of the dust filter bin through a pipeline, the exhaust port of the dust filter bin is connected to the air inlet of the fan, and the exhaust port of the fan is connected to the exhaust pipe.

[0020] Preferably, a dust concentration detector is connected to one side of the third discharge port.

[0021] Preferably, the tail of the cover plate is connected to the frame or shell of the dewatering screen body through a rotating shaft, and the side of the cover plate is connected to the base through a hydraulic cylinder.

[0022] Beneficial effects of the utility model:

[0023] The utility model, by providing a first striking device, can effectively remove strongly adhered water-containing materials from the first dewatering screen; by providing a second striking device, it can strike and remove clogged materials on the second dewatering screen. The combination of the first and second striking devices forms a dual striking and screening mechanism that can solve the problem of screen clogging in the prior art dewatering screens when processing materials with high moisture content, high viscosity, and a large number of fine particles. This improves screening efficiency and dewatering effects, ensures the continuous and stable operation of the dewatering screen, extends the service life of the equipment, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0025] Figure 1 This is a schematic diagram of the external structure of the anti-clogging dewatering screen according to an embodiment of the utility model;

[0026] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a schematic diagram of the internal structure of the dewatering screen body behind the hidden part of the shell according to the embodiment of the utility model. Figure 1 ;

[0028] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0029] Figure 5 This is a schematic diagram of the internal structure of the dewatering screen body behind the hidden part of the shell according to the embodiment of the utility model. Figure 2 ;

[0030] Figure 6 yes Figure 5 Enlarged view of point C in the middle;

[0031] Figure 7 This is a schematic diagram of the internal structure of the dewatering screen body behind the hidden part of the shell according to the embodiment of the utility model. Figure 3 ;

[0032] Figure 8 yes Figure 7 Enlarged view of point D in the middle.

[0033] In the picture:

[0034] 1. Dewatering screen body; 11. Cover plate; 111. Feed port; 112. First dust removal port; 113. Rotating shaft; 12. First dewatering screen; 13. First discharge port; 14. Second dewatering screen; 15. Second discharge port; 16. Third discharge port; 17. First striking device; 171. Drive cylinder; 172. Striking head; 18. Second striking device; 181. Elastic component; 1811. Spring; 182. Striking component; 1821. Round roller; 18211. Roller shaft; 183. Connecting piece;

[0035] 2. Power source of dewatering screen;

[0036] 3. Elastic support frame; 31. Upper fixed section; 32. Elastic section; 33. Lower fixed section;

[0037] 4. Base;

[0038] 5. Hydraulic cylinder;

[0039] 6. Third silo; 61. Second dust removal port;

[0040] 7. Dust recovery device; 71. Dust filter chamber; 72. Fan; 73. Exhaust duct;

[0041] 8. Dust concentration detector. DETAILED DESCRIPTION

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with examples. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present invention encompass such modifications and variations as come within the scope of the appended claims and their equivalents.

[0043] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention. The terms "connected", "connected", and "set" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0044] Example 1:

[0045] like Figures 1 to 8 As shown, an anti-clogging dewatering screen includes a dewatering screen body 1, the dewatering screen body 1 is connected to a dewatering screen power source 2, and the dewatering screen body 1 is connected to a base 4 through an elastic support frame 3;

[0046] The dewatering screen body 1 is provided with a cover plate 11, a first dewatering screen 12 is provided below the cover plate 11, the end of the first dewatering screen 12 is connected to the first discharge port 13, a second dewatering screen 14 is provided below the first dewatering screen 12, the end of the second dewatering screen 14 is connected to the second discharge port 15, and a third discharge port 16 is provided below the second dewatering screen 14;

[0047] The cover plate 11 is connected to a first striking device 17, which includes a driving cylinder 171 and a striking head 172. The driving cylinder 171 can drive the striking head 172 to strike the first dewatering screen 12 to remove the material stuck on the first dewatering screen 12;

[0048] A second striking device 18 is connected below the first dewatering screen 12, and the second striking device 18 includes an elastic component 181 and a striking component 182. The upper end of the elastic component 181 is connected to the bottom of the first dewatering screen 12, and the lower end of the elastic component 181 is connected to the striking component 182. The striking component 182 is arranged above the second dewatering screen 14. The vibration of the first dewatering screen 12 is transmitted to the striking component 182 through the elastic component 181, so that the striking component 182 strikes the second dewatering screen 14 to clear the material blocked on the second dewatering screen 14.

[0049] In practice, the base 4 can be mounted in two ways: 1. It can be securely connected to the production line's fixed frame via bolts or other fasteners, achieving tight integration with the entire production line. 2. Support legs or brackets can be installed at the bottom of the base 4. By adjusting the height of the legs or brackets, the dewatering screen can be placed directly on a flat surface. The number of first striking devices 17 can be flexibly set to one or more, depending on the size of the dewatering screen body 1 and the extent of material blockage. If multiple first striking devices 17 are provided, they can be evenly distributed to ensure that the striking range covers the entire screen area of ​​the first dewatering screen 12.

[0050] The connection method between the first and second discharge ports 13, 15 can be determined based on specific production requirements. If material segmentation is required, they can be connected to separate conveyor belts to achieve classified transportation of materials of different particle sizes. If segmentation is not required, both can be connected to the same conveyor belt to simplify the material transportation process. The third discharge port 16 can be used to recover fine particles, dust, water, slurry, and other substances that are smaller than the aperture of the second dewatering screen 14. A collection container or a recovery pipeline can be installed at the third discharge port 16 to transport the materials to a designated location.

[0051] The driving cylinder 171 can be an air cylinder, an oil cylinder or an electric cylinder. The end face of the impact head 172 can be set to a plane or a spherical surface. The dewatering screen power source 2 can adopt an electromagnetic vibrator or an eccentric block vibration motor. The elastic support frame 3 can be designed in a manner consisting of an upper fixed section 31, an elastic section 32 and a lower fixed section 33. The upper fixed section 31 can be connected to the outer shell or frame of the dewatering screen body 1 by welding, bolting, etc. In order to enhance the connection strength, a reinforcing rib can be provided on the upper fixed section 31; the lower fixed section 33 is welded or bolted to the base 4. The elastic section 32 can be selected from a compression spring. When the dewatering screen power source 2 is working, the vibration generated is transmitted to the elastic support frame 3 through the dewatering screen body 1. The elastic section 32 produces reciprocating elastic deformation, so that the dewatering screen body 1 maintains a stable vibration state.

[0052] The cover plate 11, first dewatering screen 12, and second dewatering screen 14 can be connected to the outer shell or frame of the dewatering screen body 1 via bolts and clips. The utility model provides two stages of dewatering screens. The first dewatering screen 12 can initially screen the material, intercepting larger particles and reducing the screening load of the second dewatering screen 14. This reduced screening load helps reduce the possibility of clogging of the second dewatering screen 14. The second dewatering screen 14 further screens smaller particles. When the first dewatering screen 12 becomes clogged, the first striking device 17 strikes the first dewatering screen 12, causing the clogged material to loosen and fall off more easily under the force of the strike, thereby resolving the blockage.

[0053] The present invention differs from existing methods such as brush roller cleaning or anti-clogging devices in that it uses a first striking device 17 to directly strike the screen to clear blockages. Existing brush rollers are prone to wear, lack cleaning power, and have limited mechanical strength. However, the present invention's first striking device 17, through a drive cylinder 171, drives a striking head 172 to forcefully impact the screen, effectively removing strongly adhered materials, improving cleaning effectiveness and screening efficiency, and reducing maintenance costs. This effectively resolves screen blockage issues, increases the efficiency and service life of the dewatering screen, and reduces production costs.

[0054] The elastic component 181 can be a spring 1811, or a rubber elastomer. The rubber elastomer has good elasticity and wear resistance, and can absorb vibration and impact. The striking component 182 can be cylindrical, or it can be plate-shaped, block-shaped or spherical. In the initial state, the elastic component 181 can be in contact with the mesh surface of the second dewatering screen 14, or a certain distance can be maintained. When the distance is maintained, the distance can be specifically set according to the material properties and blockage conditions. The number of second striking devices 18 can be set to one or more, and multiple second striking devices 18 can be arranged in parallel or staggered below the first dewatering screen 12 to ensure that multiple areas of the second dewatering screen 14 can be effectively struck.

[0055] Compared to existing methods that rely solely on the vibration of a single screen or simple cleaning components, the present invention adds a second striking device 18, which utilizes the vibration energy of the first dewatering screen 12, transferring it via elastic components 181 to striking components 182 to assist in cleaning the second dewatering screen 14. While existing cleaning methods using a single screen are difficult to effectively remove strongly adhering materials, the present invention's second striking device 18 enables coordinated cleaning of both screens without adding an additional power source, effectively improving cleaning efficiency and screening effectiveness, reducing energy consumption and equipment costs, and effectively reducing clogging of the second dewatering screen 14, ensuring continuous and stable operation of the dewatering screen.

[0056] Example 2:

[0057] Furthermore, each second striking device 18 includes two elastic components 181 , and the striking component 182 is connected between the two elastic components 181 .

[0058] In specific implementations, the striking member 182 can be designed in various shapes, such as roller, cylinder, plate, rod, etc. Different from the connection method of a single elastic member 181 and striking member 182, the use of two elastic members 181 to support one striking member 182 makes the striking member 182 more stable and more evenly stressed during the striking process, and can more effectively transmit vibration energy to the second dewatering screen 14, thereby enhancing the effect of clearing blocked materials.

[0059] Example 3:

[0060] Furthermore, the elastic component 181 is a spring 1811 , the striking component 182 is a round roller 1821 , and the spring 1811 is connected to the roller shaft 18211 of the round roller 1821 through a connecting piece 183 .

[0061] In a specific implementation, the connecting member 183 can be a metal column, the upper section of which is inserted into the spring 1811 and fixed by welding. The lower section of the metal column and the roller shaft 18211 can be connected by welding, threading or keying.

[0062] Example 4:

[0063] Furthermore, the cover plate 11 is provided with a feed port 111 , and a first dust removal port 112 is provided on one side of the feed port 111 .

[0064] During specific implementation, a feed port 111 is provided on the cover plate 11 so that the material can enter the interior of the dewatering screen in an orderly manner to prevent the material from scattering. The first dust removal port 112 can be connected to a variety of dust removal devices. If a stand-alone dust collector is used, a bag dust collector or a cyclone dust collector can be selected. The first dust removal port 112 can also be connected to the general dust removal pipeline in the factory area, and the dust generated during the screening process can be uniformly treated by a centralized dust removal system to prevent dust from overflowing and polluting the working environment. Unlike traditional open screening equipment, the utility model can achieve relative sealing of the screening process by providing a cover plate 11 and arranging a feed port 111 and a first dust removal port 112 on the cover plate 11, thereby reducing the pollution of the environment by dust overflow.

[0065] Example 5:

[0066] Furthermore, a third silo 6 is provided below the third discharge port 16 .

[0067] In practice, the third silo 6 can be used to collect and recover fine particles smaller than the aperture of the second dewatering screen 14, as well as moisture, dust, and slurry. The first and second discharge ports 13, 15 can also be connected to corresponding silos to store the screened materials. However, in most production lines, the materials screened by the first and second discharge ports 13, 15 constitute the primary component, and silos are typically not provided. Instead, materials are promptly removed by manual handling, vehicle transportation, or conveyor belt transport.

[0068] Example 6:

[0069] Furthermore, a second dust removal port 61 is provided on one side of the third silo 6 .

[0070] During specific implementation, during the operation of the dewatering screen, dust will accumulate inside the third silo 6. The second dust removal port 61 can be connected to the dust suction pipe to promptly suck out the dust accumulated inside the third silo 6 to prevent the dust from circulating inside the equipment and adhering to the screen again to cause blockage. At the same time, it can reduce the wear of dust on internal parts of the equipment, extend the service life of the equipment, and ensure the stability and reliability of the equipment operation.

[0071] Example 7:

[0072] Furthermore, it also includes a dust recovery device 7, which includes a dust filter bin 71, a fan 72 and an exhaust pipe 73;

[0073] The first dust removal port 112 and / or the second dust removal port 61 are connected to the air inlet of the dust filter bin 71 through a pipeline, the exhaust port of the dust filter bin 71 is connected to the air inlet of the fan 72, and the exhaust port of the fan 72 is connected to the exhaust pipe 73.

[0074] In specific implementation, the technical solution of the present invention can be combined with the existing PLC control system and dust detection device. After connecting to the PLC control system and dust detection device, the PLC can monitor the dust concentration of the dewatering screen in real time according to the preset program and the signal feedback from the dust detection device. When the dust concentration exceeds the set threshold, the PLC control device can control the dust recovery device 7 to increase the suction force to ensure that the dust is recovered in time. The dust recovery device 7 can reduce the risk of screen clogging due to dust accumulation by reducing the adhesion of dust to the screen surface.

[0075] Example 8:

[0076] Furthermore, a dust concentration detector 8 is connected to one side of the third discharge port 16 .

[0077] In specific implementations, the dust concentration detector 8 can be a laser dust concentration detector or a beta-ray dust concentration detector. The laser dust concentration detector uses the principle of laser scattering to measure dust concentration by detecting the intensity of scattered light after laser irradiation of dust particles. It has the characteristics of high measurement accuracy and fast response speed. The beta-ray dust concentration detector uses the attenuation of beta rays when passing through dust-laden air to measure dust concentration. The measurement results are accurate and reliable, and are not affected by factors such as dust color and particle size.

[0078] When connected to the PLC controller, when the dust concentration detector 8 detects that the dust concentration in the environment increases, the PLC controller can send a signal to the dust recovery device 7 based on the feedback signal of the dust concentration detector 8, so that it increases the suction force or adjusts the working mode to enhance the dust collection capacity.

[0079] Example 9:

[0080] Furthermore, the tail of the cover plate 11 is connected to the frame or shell of the dewatering screen body 1 through the rotating shaft 113 , and the side of the cover plate 11 is connected to the base 4 through the hydraulic cylinder 5 .

[0081] In practice, the hydraulic cylinder 5's ends are connected to the cover plate 11 and the base 4, respectively. The hydraulic cylinder 5 achieves telescopic movement through changes in internal hydraulic oil pressure. During operation, the hydraulic cylinder 5 can be connected to the cover plate 11 via a rotary joint or universal joint, enabling angular rotation. When equipment maintenance is required, the hydraulic cylinder 5 can be used to drive the cover plate 11 to flip, making it easier for operators to clean and inspect the screen.

[0082] Based on the technical solutions provided in the above embodiments, the anti-clogging dewatering screen of the present invention can be operated as follows during specific use:

[0083] Material Feed: Moisture-containing material enters the dewatering screen body 1 through the feed port 111 on the cover plate 11 and initially falls onto the surface of the first dewatering screen 12. Driven by the dewatering screen power source 2, the first dewatering screen 12 vibrates regularly, performing a preliminary screening of the material. During this process, the first dust removal port 112 is connected to the dust recovery device 7. Fan 72 draws air to create a negative pressure, continuously absorbing dust generated during the screening process and preventing it from spilling and contaminating the environment.

[0084] Screening and first blockage removal on the first dewatering screen 12: For materials with high water content and prone to compaction on the surface of the first dewatering screen 12, the first striking device 17 drives the striking head 172 via the drive cylinder 171 to periodically strike the screen surface. The striking head 172 can redisperse the material particles that have blocked the screen holes. The first dewatering screen 12 can be installed at a first inclination angle (usually 5°-15°, adjustable according to material characteristics) with respect to the horizontal plane. This first inclination angle creates a "high feed end and low discharge end" slope structure on the first dewatering screen 12. Large particles that cannot pass through the aperture of the first dewatering screen 12 move toward the end due to the screen vibration and are ultimately discharged from the first discharge port 13. Based on production needs, it can be connected to a conveyor belt or directly cleared.

[0085] Screening and Secondary Clearing of Small Particles on Second Dewatering Screen 14: Small particles screened by first dewatering screen 12 fall onto second dewatering screen 14. At this point, second striking device 18, connected to the bottom of first dewatering screen 12, vibrates with it, transmitting vibrational energy to striking component 182 via elastic component 181. Striking component 182 reciprocates above second dewatering screen 14, striking its surface and removing any compacted material adhering to it. Second dewatering screen 14 can be installed at a second inclination angle (typically 5°-15°, adjustable based on material characteristics) relative to the horizontal. This second inclination creates a "higher feed end and lower discharge end" slope on second dewatering screen 14. Small particles unable to pass through the apertures of second dewatering screen 14 are discharged through second discharge port 15, completing the secondary classification.

[0086] Recovery of fine particle materials and dust treatment: The fine particle materials, water, slurry, etc. that pass through the second dewatering screen 14 fall into the third discharge port 16 below and are discharged to the third silo 6 for recovery. The dust concentration detector 8 installed on one side of the third discharge port 16 monitors the dust concentration in the surrounding environment in real time. When the dust concentration detection value exceeds the set threshold, the fan 72 can be manually turned on by the operator, or automatically controlled by the PLC system. After the fan 72 is running, a negative pressure is formed in the third silo 6, and the dust-laden air enters the dust filter bin 71 through the second dust removal port 61. After being filtered by the filter bag, the clean air is discharged from the exhaust pipe 73, and the dust is collected and treated, thereby achieving efficient dust recovery and environmentally friendly discharge.

[0087] In summary, the utility model can be applied to material dehydration and screening to effectively clean materials that strongly adhere to the screen.

[0088] It should be noted that in order to clearly demonstrate the structural relationship of the internal key components of the present invention, some pipelines, lines, fixing frames and other components of the actual product are omitted in the drawings. However, the specific design schemes of these omitted components are all easily implemented by ordinary technicians in this field based on the technical scheme currently given in this utility model combined with conventional designs.

[0089] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dewatering screen with an anti-clogging function, comprising a dewatering screen body (1), the dewatering screen body (1) being connected to a dewatering screen power source (2), the dewatering screen body (1) being connected to a base (4) via an elastic support frame (3), characterized in that: The dewatering screen body (1) is provided with a cover plate (11), a first dewatering screen (12) is provided below the cover plate (11), the end of the first dewatering screen (12) is connected to a first discharge port (13), a second dewatering screen (14) is provided below the first dewatering screen (12), the end of the second dewatering screen (14) is connected to a second discharge port (15), and a third discharge port (16) is provided below the second dewatering screen (14); The cover plate (11) is connected to a first striking device (17), the first striking device (17) comprising a driving cylinder (171) and a striking head (172), the driving cylinder (171) being capable of driving the striking head (172) to strike the first dewatering screen (12) to remove materials blocked on the first dewatering screen (12); A second striking device (18) is connected below the first dewatering screen (12). The second striking device (18) includes an elastic component (181) and a striking component (182). The upper end of the elastic component (181) is connected to the bottom of the first dewatering screen (12), and the lower end of the elastic component (181) is connected to the striking component (182). The striking component (182) is arranged above the second dewatering screen (14).

2. The anti-clogging dewatering screen according to claim 1, characterized in that: Each of the second striking devices (18) includes two elastic components (181), and the striking component (182) is connected between the two elastic components (181).

3. The anti-clogging dewatering screen according to claim 2, characterized in that: The elastic component (181) is a spring (1811), the striking component (182) is a round roller (1821), and the spring (1811) is connected to the roller shaft (18211) of the round roller (1821) via a connecting member (183).

4. The anti-clogging dewatering screen according to claim 1, characterized in that: The cover plate (11) is provided with a feed port (111), and a first dust removal port (112) is provided on one side of the feed port (111).

5. The anti-clogging dewatering screen according to claim 4, characterized in that: A third material bin (6) is provided below the third discharge port (16).

6. The anti-clogging dewatering screen according to claim 5, characterized in that: A second dust removal port (61) is provided on one side of the third silo (6).

7. The anti-clogging dewatering screen according to claim 6, characterized in that: It also includes a dust recovery device (7), wherein the dust recovery device (7) includes a dust filter bin (71), a fan (72), and an exhaust pipe (73); The first dust removal port (112) and / or the second dust removal port (61) are connected to the air inlet of the dust filter bin (71) via a pipeline, the air outlet of the dust filter bin (71) is connected to the air inlet of the fan (72), and the air outlet of the fan (72) is connected to the exhaust pipe (73).

8. The anti-clogging dewatering screen according to claim 7, characterized in that: A dust concentration detector (8) is connected to one side of the third discharge port (16).

9. The anti-clogging dewatering screen according to any one of claims 1 to 8, characterized in that: The tail of the cover plate (11) is connected to the frame or shell of the dewatering screen body (1) via a rotating shaft (113), and the side of the cover plate (11) is connected to the base (4) via a hydraulic cylinder (5).

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