Electromagnetic excitation screening equipment

Abstract

The utility model relates to the technical field of screening equipment, and provides electromagnetic excitation screening equipment which is characterized in that a screen is arranged on a screen box; the first beating piece is arranged on the screen box in a relatively rotating mode and located below the screen, and the included angle between the first beating piece and the screen is alpha; the second beating piece is arranged on the screen box in a relatively rotating mode and located below the screen, the included angle beta between the second beating piece and the screen is larger than alpha and smaller than 90 degrees; the vibration exciter is arranged on the screen box and provided with an output rod used for reciprocating vibration excitation, and the output rod is in transmission connection with the first striking piece and the second striking piece and used for driving the first striking piece and the second striking piece to rotate and strike the screen. By means of the technical scheme, the screen cloth can vibrate up and down and can also generate certain inclined vibration, the vibration mode is beneficial to better layering and through screening of fine-grain materials on the screen face, and the screening efficiency can be greatly improved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of screening equipment technology, and more specifically, to an electromagnetically vibrating screening device. Background Technology

[0002] In coal and mineral processing, the screening and desliming of fine materials are crucial for improving concentrate quality and ensuring the smooth operation of subsequent processes. Traditional high-frequency screens often suffer from low screening efficiency, easy screen clogging, and unstable amplitude when processing fine materials. These devices typically use the centrifugal force generated by a mechanical inertial vibrator to drive the entire vibrating screen box to reciprocate at a certain vibration angle. The material is classified and conveyed under the action of vibration on the screen plate or screen with a certain screen aperture size.

[0003] Current screening equipment struggles to adapt to the screening needs of materials with varying properties, resulting in ineffective stratification and screening of fine particles on the screen surface. This negatively impacts desliming efficiency and concentrate recovery. With the continuous development of mineral resources and the increasing complexity of ore properties, the performance requirements for screening equipment are also rising. There is an urgent need for a high-efficiency, stable, and adaptable screening system to meet the demands of mineral processing production. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide an electromagnetically excited screening device, which solves the technical problem in the related art that screening devices are difficult to adapt to the screening needs of materials with different properties.

[0005] According to one aspect, at least one embodiment of this disclosure provides an electromagnetically excited screening device, comprising:

[0006] sieve box,

[0007] A screen, which is disposed on the screen box;

[0008] The first striking element is rotatably disposed on the sieve box and located below the sieve mesh, and the included angle between the first striking element and the sieve mesh is α.

[0009] The second striking element is rotatably disposed on the sieve box and located below the sieve mesh. The included angle between the second striking element and the sieve mesh is β, where α < β < 90°.

[0010] A vibrator is disposed on the screen box. The vibrator has an output rod for reciprocating vibration. The output rod is pulsatorically connected to the first striking member and the second striking member, and is used to drive the first striking member and the second striking member to rotate and strike the screen.

[0011] For example, in at least one embodiment of the electromagnetic vibrating screening device provided in this disclosure, the electromagnetic vibrating screening device further includes:

[0012] A first support rod is rotatably mounted on the sieve box and located below the sieve mesh. The length direction of the first support rod is arranged along the width direction of the sieve mesh, and a plurality of first striking elements are arranged on the first support rod along the length direction.

[0013] A first connecting rod, one end of which is connected to the first support rod, and the other end which is slidably disposed relative to the output rod. After the first connecting rod slides, it is used to move closer to or further away from the axis of the output rod, and drives the first striking element to rotate and strike the screen through the first support rod.

[0014] For example, in at least one embodiment of the electromagnetic vibrating screening device provided in this disclosure, the electromagnetic vibrating screening device further includes:

[0015] The second support rod is rotatably mounted on the screen box and located below the screen mesh. The length direction of the second support rod is along the width direction of the screen mesh, and a plurality of second striking elements are arranged on the second support rod along the length direction.

[0016] The second connecting rod has one end connected to the second support rod and the other end slidably disposed relative to the output rod. After sliding, the second connecting rod is used to move closer to or further away from the axis of the output rod, and drives the second striking element to rotate and strike the screen through the second support rod.

[0017] For example, in at least one embodiment of the electromagnetic vibrating screening device provided in this disclosure, the vibrator is located outside the screen box and between the first support rod and the second support rod. The electromagnetic vibrating screening device further includes:

[0018] A positioning seat is disposed on the output rod, and the side of the positioning seat away from the screen box has a sliding groove, the length direction of which is arranged along the length direction of the screen.

[0019] The first connecting seat has one end slidingly engaged with the slide groove and the other end hinged to the first connecting rod;

[0020] The second connecting seat has one end slidingly engaged with the slide groove and the other end hinged to the second connecting rod.

[0021] For example, in at least one embodiment of the present disclosure, an electromagnetic vibrating screening device is provided, which further includes a pressure cover. The pressure cover is detachably connected to the positioning seat and is located outside the slide groove, so that the first connecting seat and the second connecting seat are slidably disposed between the positioning seat and the pressure cover.

[0022] For example, in an electromagnetic vibrating screening device provided in at least one embodiment of this disclosure, the screen box has a mounting hole, and the electromagnetic vibrating screening device further includes a buffer sleeve, which is fitted around the first support rod or the second support rod and inserted into the mounting hole.

[0023] For example, in an electromagnetic vibrating screening device provided in at least one embodiment of this disclosure, the inner end of the buffer sleeve has an inner anti-detachment protrusion, which is located inside the screen box and contacts the inner wall of the screen box.

[0024] For example, in an electromagnetic vibrating screening device provided in at least one embodiment of this disclosure, the outer end of the buffer sleeve has an outer anti-detachment protrusion, which is located between the outer wall of the screen box and the first connecting rod, or the outer anti-detachment protrusion is located between the outer wall of the screen box and the second connecting rod.

[0025] For example, in an electromagnetic vibrating screening device provided in at least one embodiment of this disclosure, the electromagnetic vibrating screening device further includes a first protective cap, which is detachably disposed on the upper end of the first striking member for contacting the screen.

[0026] For example, in an electromagnetic vibrating screening device provided in at least one embodiment of this disclosure, the electromagnetic vibrating screening device further includes a second protective cap, which is detachably disposed on the upper end of the second striking member for contacting the screen.

[0027] The beneficial effects of the embodiments disclosed herein are as follows: The screen box, as the supporting structure of the entire equipment, bears the screen and the material. The screen is mounted on the screen box. After the material falls onto the screen, under the vibration of the screen, fine particles smaller than the screen aperture size pass through the screen and fall below it, achieving screening. The vibrator is mounted on the screen box to provide vibration energy. The vibrator transmits the excitation force to the first and second striking elements through a reciprocating output rod. Because the angles between the two striking elements and the screen are different, the components of the force they exert on the screen in the horizontal and vertical directions are also different. This results in the screen not only vibrating up and down but also producing a certain degree of tilting vibration. This vibration pattern helps fine particles to better separate and pass through the screen, greatly improving screening efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of one embodiment of the present disclosure;

[0030] Figure 2 for Figure 1 A schematic diagram of the connection structure between the vibrator and the first and second striking components in the embodiment;

[0031] Figure 3 for Figure 2 A schematic diagram of the connection structure between the first connecting seat, the second connecting seat, and the positioning seat;

[0032] Figure 4 for Figure 2 A schematic diagram of the connection structure between the first support rod and the screen box.

[0033] In the diagram: 1. Screen box; 101. Mounting hole; 2. Screen mesh; 3. First striking component; 4. Second striking component; 5. Vibrator; 501. Output rod; 6. First support rod; 7. First connecting rod; 8. Second support rod; 9. Second connecting rod; 10. Positioning seat; 1001. Slide groove; 11. First connecting seat; 12. Second connecting seat; 13. Pressure cover; 14. Buffer sleeve; 1401. Inner anti-detachment protrusion; 1402. Outer anti-detachment protrusion; 15. First protective cap; 16. Second protective cap; 17. Support frame; 18. Feed box; 19. Discharge port. Detailed Implementation

[0034] The present disclosure 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 present disclosure and are not intended to limit the scope of the disclosure.

[0035] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; 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."

[0036] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" 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 connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0037] In this disclosure, unless otherwise expressly 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.

[0038] 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 this disclosure.

[0039] 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.

[0040] like Figures 1-2 As shown, an electromagnetic vibrating screening device according to an embodiment of this disclosure includes a screen box 1, a screen 2, a first striking element 3, a second striking element 4, and a vibrator 5. The screen box 1 serves as the supporting structure for the entire device, bearing the screen 2 and the material, and providing a mounting foundation for the screen 2, the first striking element 3, the second striking element 4, and the vibrator 5. The screen box 1 is typically made of high-strength metal, such as high-quality carbon structural steel or alloy steel, to ensure it can withstand the weight of the material and the various forces generated during vibration. The screen box 1 is inclined on a support frame 17, such as... Figure 1 As shown, the left end of the screen box 1 is inclined downward, the feed box 18 is located at the right end of the screen box 1 and above the screen 2, and the bottom of the left end of the screen box 1 is provided with a discharge port 19.

[0041] Screen 2 is mounted on screen box 1. The width of screen 2 is set along the front-to-back direction, and screen 2 is also inclined downwards at the left end. Screen 2 is used to screen materials, and the selection of its material and type depends on the properties of the material, particle size requirements, and screening accuracy. After the material in feed box 18 flows out, it falls onto screen 2. Under the vibration of screen 2, fine particles smaller than the screen hole size pass through screen 2 and fall below screen 2, and then are discharged from discharge port 19, thus achieving screening.

[0042] The first striking element 3 is rotatably mounted on the screen box 1 and located below the screen 2. The upper end of the first striking element 3 is inclined to the left towards the discharge port 19, and the angle between the first striking element 3 and the screen 2 is α. The second striking element 4 is rotatably mounted on the screen box 1 and located below the screen 2. The upper end of the second striking element 4 is inclined to the left towards the discharge port 19, and the angle between the second striking element 4 and the screen 2 is β, where α < β < 90°. Both the first striking element 3 and the second striking element 4 are rod-shaped, and the length of the first striking element 3 is greater than the length of the second striking element 4, so that α < β. Both the first striking element 3 and the second striking element 4 are made of high-strength, high-toughness alloy steel to withstand long-term impact and vibration loads.

[0043] Vibrator 5 is installed on screen box 1 to provide vibration energy. Vibrator 5 is preferably an electromagnetic vibrator. Multiple vibrators 5 are installed on both the front and rear sides of screen box 1. All vibrators 5 located on the same side of screen box 1 are arranged along the length of screen box 1, and the vibrators 5 on the front and rear sides are symmetrically arranged. Vibrator 5 has an output rod 501 for reciprocating vibration. When not working, the axial direction of the output rod 501, i.e., the vibration direction, is perpendicular to the screen surface of screen mesh 2. The output rod 501 is connected to the first striking member 3 and the second striking member 4 for driving the first striking member 3 and the second striking member 4 to rotate and strike screen mesh 2.

[0044] In use, the vibrator 5 transmits the excitation force to the first striking element 3 and the second striking element 4 through the reciprocating excitation output rod 501. Since the angle between the two striking elements and the screen 2 is different, the components of the force they exert on the screen 2 in the horizontal and vertical directions are also different. This causes the screen 2 to vibrate not only up and down, but also to produce a certain degree of tilting vibration. This vibration mode helps fine particles to be better separated and screened on the screen surface, which can greatly improve the screening efficiency.

[0045] In some examples, an electromagnetic vibrating screening device further includes a first support rod 6 and a first connecting rod 7. The first support rod 6 is rotatably mounted on the screen box 1 and located below the screen 2. The length direction of the first support rod 6 is set along the width direction of the screen 2. A plurality of first striking elements 3 are arranged on the first support rod 6 along the length direction. One end of the first connecting rod 7 is connected to the first support rod 6, and the other end is slidably mounted relative to the output rod 501. After the first connecting rod 7 slides, it is used to move closer to or away from the axis of the output rod 501, and drives the first striking elements 3 to rotate and strike the screen 2 through the first support rod 6.

[0046] For example, such as Figure 1 and Figure 2 As shown, the length of the first support rod 6 is arranged along the width direction of the screen 2, i.e., the front-to-back direction. The first support rod 6 is rotatably mounted on the screen box 1 via bearings or bushings to ensure smooth rotation. The lower end of the first striking element 3 is firmly fixed to the first support rod 6, for example, by welding, key connection, or bolt connection. The number and spacing of the first striking elements 3 on the first support rod 6 can be set according to the width of the screen 2 and the screening requirements. When the output rod 501 reciprocates, one end of the first connecting rod 7 slides closer to or away from the axis of the output rod 501, and the other end of the first connecting rod 7 can drive the first support rod 6 to rotate synchronously. Multiple first support rods 6 are spaced apart along the length of the screen 2. The front and rear ends of the first support rod 6 are slidably set relative to the output rod 501 of the corresponding vibrator 5 via the first connecting rod 7. The number and spacing of the first support rods 6 can be set according to the length of the screen 2 and the screening requirements.

[0047] In use, the output rod 501 of the vibrator 5 drives the first support rod 6 to rotate via the first connecting rod 7. Since the first striking element 3 is fixed on the first support rod 6, the first striking element 3 rotates accordingly and strikes the screen 2. Multiple first striking elements 3 arranged along the length of the first support rod 6 can generate striking force at different positions on the screen 2, making the vibration of the screen 2 more uniform in that direction. This helps the material to be better stratified and pass through the screen in that area, further improving the screening efficiency.

[0048] In some examples, an electromagnetic vibrating screening device further includes a second support rod 8 and a second connecting rod 9. The second support rod 8 is rotatably mounted on the screen box 1 and located below the screen 2. The length direction of the second support rod 8 is arranged along the width direction of the screen 2. A plurality of second striking elements 4 are arranged on the second support rod 8 along the length direction. One end of the second connecting rod 9 is connected to the second support rod 8, and the other end is slidably mounted relative to the output rod 501. After the second connecting rod 9 slides, it is used to move closer to or away from the axis of the output rod 501, and drives the second striking elements 4 to rotate and strike the screen 2 through the second support rod 8.

[0049] For example, such as Figure 1and Figure 2 As shown, the length of the second support rod 8 is along the width direction of the screen 2, i.e., the front-to-back direction. The second support rod 8 is rotatably mounted on the screen box 1 via bearings or bushings to ensure smooth rotation. The lower end of the second striking element 4 is firmly fixed to the second support rod 8, for example, by welding, key connection, or bolt connection. The number and spacing of the second striking elements 4 on the second support rod 8 can be set according to the width of the screen 2 and the screening requirements. When the output rod 501 reciprocates, one end of the second connecting rod 9 slides closer to or away from the axis of the output rod 501, and the other end of the second connecting rod 9 can drive the second support rod 8 to rotate synchronously. Multiple second support rods 8 are spaced apart along the length of the screen 2. The front and rear ends of the second support rod 8 are slidably mounted relative to the output rod 501 of the corresponding vibrator 5 via the second connecting rod 9. The number and spacing of the second support rods 8 can be set according to the length of the screen 2 and the screening requirements.

[0050] In use, the output rod 501 of the vibrator 5 drives the second support rod 8 to rotate via the second connecting rod 9. Since the second striking element 4 is fixed on the second support rod 8, the second striking element 4 rotates accordingly and strikes the screen 2. Multiple second striking elements 4 arranged along the length of the second support rod 8 can generate striking force at different positions on the screen 2, making the vibration of the screen 2 more uniform in that direction. This helps the material to be better stratified and pass through the screen in that area, further improving the screening efficiency.

[0051] In some examples, the vibrator 5 is located outside the screen box 1 and between the first support rod 6 and the second support rod 8. An electromagnetic vibrating screening device also includes a positioning seat 10, a first connecting seat 11 and a second connecting seat 12. The positioning seat 10 is mounted on the output rod 501. The side of the positioning seat 10 away from the screen box 1 has a sliding groove 1001. The length direction of the sliding groove 1001 is set along the length direction of the screen 2. One end of the first connecting seat 11 is slidably engaged with the sliding groove 1001, and the other end is hinged to the first connecting rod 7. One end of the second connecting seat 12 is slidably engaged with the sliding groove 1001, and the other end is hinged to the second connecting rod 9.

[0052] For example, such as Figure 2 and Figure 3As shown, the positioning seat 10 is securely mounted on the output rod 501 via interference fit, key connection, or threaded connection, with the slide groove 1001 located on the outside of the positioning seat 10. The movable ends of the first connecting seat 11 and the second connecting seat 12 form a sliding fit with the slide groove 1001, and the hinged ends are hinged to the first connecting rod 7 and the second connecting rod 9 via pins. The first connecting rod 7 and the first support rod 6, as well as the second connecting rod 9 and the second support rod 8, can be connected by bolts or quick-plug connections for easy disassembly and maintenance. To make the connection between the first connecting seat 11, the second connecting seat 12, and the positioning seat 10 more robust and reliable, the positioning seat 10 adopts an inner circle and outer square structure.

[0053] The positioning seat 10 provides positioning for the first connecting seat 11 and the second connecting seat 12, enabling them to reliably connect to the output rod 501 and transmit the movement of the output rod 501 to the first connecting seat 11 and the second connecting seat 12. The first connecting seat 11 and the second connecting seat 12 respectively transmit the movement of the output rod 501 to the first connecting rod 7 and the second connecting rod 9, thereby driving the first support rod 6 and the second support rod 8 to rotate.

[0054] In some examples, an electromagnetically vibrating screening device further includes a pressure cover 13, which forms a detachable connection with the positioning seat 10 and is located outside the slide groove 1001, so that the first connecting seat 11 and the second connecting seat 12 are slidably disposed between the positioning seat 10 and the pressure cover 13.

[0055] The pressure cap 13 is detachably connected to the positioning seat 10 via bolts or clips, allowing the first connecting seat 11 and the second connecting seat 12 to slide between the positioning seat 10 and the pressure cap 13 without detaching from the positioning seat 10. This detachable connection improves the maintainability of the equipment, reduces maintenance costs and difficulty, and enables quick replacement of damaged parts, minimizing equipment downtime. The pressure cap 13 alone is sufficient to position the first connecting seat 11 and the second connecting seat 12 on the positioning seat 10, resulting in a simple structure that is easy and quick to assemble and disassemble, saving time and effort.

[0056] In some examples, the screen box 1 has a mounting hole 101. An electromagnetically vibrating screening device also includes a buffer sleeve 14, which is fitted around the first support rod 6 or the second support rod 8 and is inserted into the mounting hole 101.

[0057] For example, such as Figure 2 and Figure 4As shown, the buffer sleeve 14 is made of rubber or polyurethane material with good elasticity, and has good shock absorption and buffering performance. The buffer sleeve 14 is fitted on the first support rod 6 or the second support rod 8 and inserted into the mounting hole 101 of the screen box 1, which plays a role in buffering and shock absorption. It can reduce the impact on the screen box 1 when the first support rod 6 and the second support rod 8 rotate, reduce the noise and vibration during equipment operation, and extend the service life of the screen box 1.

[0058] In some examples, the inner end of the buffer sleeve 14 has an inner anti-detachment protrusion 1401, which is located inside the sieve box 1 and contacts the inner wall of the sieve box 1.

[0059] For example, such as Figure 4 As shown, the inner anti-detachment protrusion 1401 is integrally formed with the buffer sleeve 14 and is ring-shaped. The inner anti-detachment protrusion 1401 is located inside the screen box 1 and fits against the inner wall of the screen box 1. Through its large outer diameter, it prevents the buffer sleeve 14 from sliding out of the screen box 1 or even falling off, which can improve the stability of the buffer sleeve 14 on the screen box 1.

[0060] In some examples, the outer end of the buffer sleeve 14 has an outer anti-detachment protrusion 1402, which is located between the outer wall of the screen box 1 and the first connecting rod 7, or the outer anti-detachment protrusion 1402 is located between the outer wall of the screen box 1 and the second connecting rod 9.

[0061] For example, such as Figure 4 As shown, the outer anti-detachment protrusion 1402 is integrally formed with the buffer sleeve 14 and is annular in shape. The outer anti-detachment protrusion 1402 is located on the outside of the screen box 1 and fits against the outer wall of the screen box 1. Through its large outer diameter, it prevents the buffer sleeve 14 from sliding into the screen box 1 or even detaching. The outer anti-detachment protrusion 1402 cooperates with the inner anti-detachment protrusion 1401 to make the installation of the buffer sleeve 14 on the screen box 1 more stable, prevent the buffer sleeve 14 from shifting during equipment operation, and ensure that the buffer sleeve 14 can continuously and effectively buffer the impact of the rotation of the support rod on the screen box 1.

[0062] In some examples, an electromagnetically vibrating screening device also includes a first protective cap 15, which is detachably mounted on the upper end of the first striking member 3 for contacting the screen 2.

[0063] For example, such as Figure 2 As shown, the first protective cap 15 is made of wear-resistant polyurethane material. Its shape is adapted to the upper end of the first striking part 3. It can be detachably installed on the upper end of the first striking part 3 by means of sleeve or buckle. When the first striking part 3 rotates, the first protective cap 15 directly contacts the screen 2. After severe wear, the first protective cap 15 can be directly replaced without replacing the first striking part 3, which can save costs. The top surface of the first protective cap 15 is arc-shaped, which can reduce wear on the screen 2.

[0064] In some examples, an electromagnetically vibrating screening device also includes a second protective cap 16, which is detachably disposed on the upper end of the second striking member 4 for contacting the screen 2.

[0065] For example, such as Figure 2 As shown, the second protective cap 16 is made of wear-resistant polyurethane material. Its shape is adapted to the upper end of the second striking member 4. It can be detachably installed on the upper end of the second striking member 4 by means of sleeve or buckle. When the second striking member 4 rotates, the second protective cap 16 directly contacts the screen 2. After severe wear, the second protective cap 16 can be directly replaced without replacing the second striking member 4, which can save costs. The top surface of the second protective cap 16 is arc-shaped, which can reduce wear on the screen 2.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure 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 this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. An electromagnetically excited screening device, characterized in that, include: Sieve box (1) A screen (2) is provided on the screen box (1); The first striking element (3) is rotatably disposed on the sieve box (1) and located below the sieve (2). The included angle between the first striking element (3) and the sieve (2) is α. The second striking element (4) is rotatably disposed on the sieve box (1) and located below the sieve (2). The included angle between the second striking element (4) and the sieve (2) is β, where α < β < 90°. The vibrator (5) is disposed on the screen box (1). The vibrator (5) has an output rod (501) for reciprocating vibration. The output rod (501) is connected to the first striking member (3) and the second striking member (4) for driving the first striking member (3) and the second striking member (4) to rotate and strike the screen (2).

2. The electromagnetic vibrating screening device according to claim 1, characterized in that, The electromagnetic vibrating screening device further includes: The first support rod (6) is rotatably mounted on the sieve box (1) and located below the sieve (2). The length direction of the first support rod (6) is arranged along the width direction of the sieve (2). A plurality of first striking elements (3) are arranged on the first support rod (6) along the length direction. The first connecting rod (7) has one end connected to the first support rod (6) and the other end slidably disposed relative to the output rod (501). After the first connecting rod (7) slides, it is used to move closer to or away from the axis of the output rod (501) and drive the first striking member (3) to rotate and strike the screen (2) through the first support rod (6).

3. The electromagnetic vibrating screening device according to claim 2, characterized in that, The electromagnetic vibrating screening device further includes: The second support rod (8) is rotatably mounted on the sieve box (1) and located below the sieve (2). The length direction of the second support rod (8) is arranged along the width direction of the sieve (2). Multiple second striking elements (4) are arranged on the second support rod (8) along the length direction. The second connecting rod (9) has one end connected to the second support rod (8) and the other end slidably disposed relative to the output rod (501). After the second connecting rod (9) slides, it is used to move closer to or away from the axis of the output rod (501) and drive the second striking member (4) to rotate and strike the screen (2) through the second support rod (8).

4. The electromagnetic vibrating screening device according to claim 3, characterized in that, The vibrator (5) is located outside the screen box (1) and between the first support rod (6) and the second support rod (8). The electromagnetic vibrating screening device further includes: Positioning seat (10), the positioning seat (10) is disposed on the output rod (501), the positioning seat (10) has a groove (1001) on the side away from the screen box (1), the length direction of the groove (1001) is arranged along the length direction of the screen (2); The first connecting seat (11) has one end slidingly engaged with the slide groove (1001) and the other end hinged to the first connecting rod (7); The second connecting seat (12) has one end slidingly engaged with the slide groove (1001) and the other end hinged to the second connecting rod (9).

5. The electromagnetic vibrating screening device according to claim 4, characterized in that, The electromagnetic vibrating screening device further includes a pressure cover (13), which is detachably connected to the positioning seat (10) and located outside the slide groove (1001) so that the first connecting seat (11) and the second connecting seat (12) are slidably disposed between the positioning seat (10) and the pressure cover (13).

6. The electromagnetic vibrating screening device according to claim 3, characterized in that, The screen box (1) has a mounting hole (101). The electromagnetic vibrating screening device also includes a buffer sleeve (14). The buffer sleeve (14) is fitted around the first support rod (6) or the second support rod (8) and is inserted into the mounting hole (101).

7. The electromagnetic vibrating screening device according to claim 6, characterized in that, The inner end of the buffer sleeve (14) has an inner anti-detachment protrusion (1401), which is located inside the sieve box (1) and in contact with the inner wall of the sieve box (1).

8. The electromagnetic vibrating screening device according to claim 6, characterized in that, The outer end of the buffer sleeve (14) has an outer anti-detachment protrusion (1402), which is located between the outer wall of the sieve box (1) and the first connecting rod (7), or the outer anti-detachment protrusion (1402) is located between the outer wall of the sieve box (1) and the second connecting rod (9).

9. The electromagnetic vibrating screening device according to claim 1, characterized in that, The electromagnetic vibration screening device further includes a first protective cap (15), which is detachably mounted on the upper end of the first striking member (3) for contacting the screen (2).

10. An electromagnetically vibrating screening device according to claim 1, characterized in that, The electromagnetic vibrating screening device further includes a second protective cap (16), which is detachably mounted on the upper end of the second striking member (4) for contacting the screen (2).

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