Vibrating screening device for heavy-duty screens

Abstract

The present invention relates to the technical field of screening devices, and specifically to a vibrating screening device for heavy-duty screens, comprising a frame, a walking mechanism, a chain plate feeder and a screen box, wherein the walking mechanism is installed at the bottom of the frame, the chain plate feeder is fixedly installed on the frame, the screen box is located on one side of the chain plate feeder, a receiving assembly is arranged in the screen box, the receiving assembly comprises a buffer module and a cleaning module, the buffer module and the cleaning module cooperate with each other to improve the screening efficiency, the vibrating screening device for heavy-duty screens can buffer large stones through the receiving assembly, reduce the noise and dust generated when large stones fall on the grate screening element, and optimize the construction environment, and on the other hand, can increase the distance between small stones and large stones, avoid being squeezed by large stones and stuck in the screening slot, resulting in blockage of the screening slot, and can be matched with a crushing assembly to crush stones that may be blocked, dredge the screening slot, and thus improve the screening efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of screening devices, in particular to a vibrating screening device for a heavy-duty screen. Background Art

[0002] The heavy-duty screen is a machine that makes the screen body vibrate periodically in the direction of the exciting force, and the material moves parabolically in a straight line on the screen surface, thereby achieving the purpose of screening.

[0003] In the process of stone mining and screening, the stone is transported to the screen box of the heavy-duty screen through the chain feeder, so that the screen box vibrates to screen the stone. The stepped grate screen plate in the screen box can make the stone be graded and screened in the process of sliding across the screen surface.

[0004] However, during the screening process, there will be stones whose volume is close to the screen slot of the screen box. When such stones and stones with larger volume enter the next step successively, the potential energy generated by the larger stone will easily squeeze the stone whose volume is close to the screen slot, causing it to get stuck in the screen slot, thereby causing the screen slot to be blocked and reducing the screening efficiency. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a vibrating screening device for a heavy-duty screen, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a vibrating screening device for a heavy-duty screen, comprising a frame, a walking mechanism, a chain plate feeder and a screen box, wherein the walking mechanism is installed at the bottom of the frame, the chain plate feeder is fixedly installed on the frame, the screen box is located on one side of the chain plate feeder, a receiving assembly is arranged in the screen box, the receiving assembly comprises a buffer module and a cleaning module, and the buffer module and the cleaning module cooperate with each other to improve the screening efficiency;

[0007] Wherein, the buffer module includes a grate screening component, the grate screening component is fixedly installed inside the screen box, an installation groove is opened at one end inside the grate screening component, steel columns are fixedly installed on the left and right sides of the bottom of the installation groove, a limiting block is fixedly installed on the top of the steel column, a first return spring is sleeved on the outer circumference of the steel column, a buffer component is movably installed on the outer surface of the steel column, a buffer spring is fixedly connected to the bottom of the buffer component, one end of the buffer spring away from the buffer component is fixedly connected to the bottom of the installation groove, and a receiving component is fixedly installed on the top of the buffer component.

[0008] Optionally, the cleaning module includes a gear, a first rotating shaft is fixedly installed in the middle of the gear, the first rotating shaft is movably installed in the installation groove, a tooth groove matching the gear is opened on the surface of the buffer, and the buffer and the gear are meshed with each other;

[0009] A driving member is fixedly sleeved on the outer surface of the first rotating shaft at one end, and a first elastic column is fixedly connected to a side of the mounting groove close to the driving member, and a follower is fixedly connected to the other end of the first elastic column, and a cleaning member is fixedly mounted on the top of the follower, and the bottom of the cleaning member is in active contact with the surface of the grate screening member, and a groove matching the follower is formed on the surface of the grate screening member, and a baffle is arranged above the groove, and the baffle is fixedly connected to the cleaning member, and an eccentric wheel is fixedly mounted on the outer surface of the first rotating shaft away from the driving member.

[0010] Optionally, a crushing assembly is provided in the installation groove, and the crushing assembly includes a reinforcing steel fixedly installed in the installation groove, the reinforcing steel connects two sides of the installation groove, both sides of the upper surface of the reinforcing steel are slidably installed with sliders, and the top of the slider is fixedly installed with a first fixing plate;

[0011] A second elastic column is arranged between the two first fixing plates, and the two ends of the second elastic column are respectively fixedly connected to the two first fixing plates, a crushing member is fixedly installed on the side of the first fixing plate away from the second elastic column, a through groove matching the first fixing plate is opened on the surface of the grate screening member, a wedge-shaped member is fixedly installed on the bottom of the receiving member, and the bottom of the receiving member is located in the gap between the two first fixing plates;

[0012] Second return springs are fixedly installed on both sides of the installation groove, the other end of the second return spring is fixedly connected to the second fixing plate, a first touch piece is fixedly installed on one side of the second fixing plate, and the wedge piece is located just above the middle of the gap between the two second fixing plates.

[0013] Optionally, a frequency increasing component is provided on the first rotating shaft, and the frequency increasing component includes a convergence wheel, and the number of the convergence wheels is two, and they are respectively fixedly mounted on two sides of the outer surface of the first rotating shaft;

[0014] The outer surface of the tightening wheel is fixedly connected with an elastic rope, and the outer surface of the elastic rope is movably equipped with a fixing buckle, the number of the fixing buckles is greater than one, and the fixing buckle is fixedly connected to the bottom of the grate bar screening component, and the outer surface of the elastic rope is fixedly equipped with a steel ball.

[0015] Optionally, a dredging component is provided in the installation groove, and the dredging component includes a pressure head, and the pressure head is located below the buffer component on a side away from the driving component;

[0016] A second rotating shaft is fixedly installed in the middle of the pressure head, and the second rotating shaft is movably installed between the grate screening element. Both ends of the second rotating shaft pass through the mounting groove and extend to the outside of the mounting groove. Both ends of the second rotating shaft are fixedly installed with clearing pieces, and a second touching piece is fixedly installed at the bottom of the clearing piece. A tooth opening is opened on the upper surface of the grate screening element.

[0017] Optionally, the second touching member is L-shaped, and a metal buffer layer is provided on the outer surface of the second touching member.

[0018] Optionally, the diameter of the limit block is greater than the diameter of the steel column, the bottom of the first return spring is fixedly connected to the bottom of the mounting groove, and the top of the first return spring is fixedly connected to the buffer member.

[0019] Optionally, the crushing piece is made of fine steel and has a serrated shape.

[0020] Optionally, the shape of the slider is T-shaped, and a T-shaped slide groove matched with the slider is opened inside the reinforcing steel, and lubricating oil is provided in the slide groove.

[0021] The present invention provides a vibrating screening device for a heavy-duty screen, which has the following beneficial effects:

[0022] 1. The vibrating screening device for heavy-duty screens can buffer large stones through the receiving components, reduce the noise and dust generated when large stones fall on the grate screening parts, and optimize the construction environment. On the other hand, it can increase the distance between small stones and large stones to prevent them from being squeezed by large stones and stuck in the screening slot, causing the screening slot to be blocked. The crushing component can crush the stones that may be blocked and dredge the screening slot, thereby improving the screening efficiency.

[0023] 2. The vibrating screening device for heavy-duty screens can increase the vibration frequency of the grate screening element through the frequency increasing component and the dredging component, and dredge the screening slots of the grate screening element to prevent blockage, thereby further improving the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 The structure of the grate screening element of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 3 The structure of the grate screening element of the present invention is shown in FIG. Figure 2 ;

[0027] Figure 4 The structure of the grate screening element of the present invention is shown in FIG. Figure 3 ;

[0028] Figure 5 It is a schematic diagram of the structure inside the installation slot of the present invention;

[0029] Figure 6 It is a schematic diagram of the positional relationship structure of the receiving component, the crushing component, the frequency increasing component and the dredging component of the present invention;

[0030] Figure 7 The schematic diagram of the positional relationship between the receiving assembly and the crushing assembly of the present invention is shown in FIG. Figure 1 ;

[0031] Figure 8 The schematic diagram of the positional relationship between the receiving assembly and the crushing assembly of the present invention is shown in FIG. Figure 2 ;

[0032] Fig. 9 The structure of the crushing component of the present invention is schematically shown. Figure 1 ;

[0033] Fig.10 The structure of the crushing component of the present invention is schematically shown. Figure 2 .

[0034] In the figure: 1, frame; 11, walking mechanism; 12, chain plate feeder; 13, screen box; 2, grate screening element; 21, mounting groove; 22, steel column; 23, limit block; 24, first return spring; 25, buffer element; 26, buffer spring; 27, receiving element; 28, gear; 29, first rotating shaft; 210, driving element; 211, first elastic column; 212, driven element; 213, cleaning element; 214, baffle; 215. Eccentric wheel; 3. Reinforcement steel; 31. Sliding block; 32. First fixed plate; 33. Second elastic column; 34. Crushing member; 35. Wedge-shaped member; 36. Second return spring; 37. Second fixed plate; 38. First contact member; 39. Through groove; 4. Clamping wheel; 41. Elastic rope; 42. Fixing buckle; 43. Steel ball; 5. Pressure head; 51. Second rotating shaft; 52. Clearing member; 53. Second contact member; 6. Tooth mouth. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] Example 1: Please refer to Figures 1 to 8 The present invention provides a technical solution: a vibrating screening device for a heavy-duty screen, comprising a frame 1, a traveling mechanism 11, a chain plate feeder 12 and a screen box 13, wherein the traveling mechanism 11 is installed at the bottom of the frame 1, the chain plate feeder 12 is fixedly installed on the frame 1, the screen box 13 is located on one side of the chain plate feeder 12, and a receiving assembly is arranged in the screen box 13, the receiving assembly comprises a buffer module and a cleaning module, and the buffer module and the cleaning module cooperate with each other to improve the screening efficiency;

[0037] Wherein, the buffer module comprises a grate screening member 2, which is fixedly mounted inside the screen box 13, a mounting groove 21 is provided at one end inside the grate screening member 2, steel columns 22 are fixedly mounted on both the left and right sides of the bottom of the mounting groove 21, a limit block 23 is fixedly mounted on the top of the steel column 22, a first return spring 24 is sleeved on the outer peripheral side of the steel column 22, a buffer member 25 is movably mounted on the outer surface of the steel column 22, a buffer spring 26 is fixedly connected to the bottom of the buffer member 25, one end of the buffer spring 26 away from the buffer member 25 is fixedly connected to the bottom of the mounting groove 21, and a receiving member 27 is fixedly mounted on the top of the buffer member 25;

[0038] The diameter of the limit block 23 is larger than the diameter of the steel column 22 , the bottom of the first return spring 24 is fixedly connected to the bottom of the mounting groove 21 , and the top of the first return spring 24 is fixedly connected to the buffer 25 ;

[0039] The cleaning module includes a gear 28, a first rotating shaft 29 is fixedly installed in the middle of the gear 28, and the first rotating shaft 29 is movably installed in the installation groove 21. The surface of the buffer 25 is provided with a tooth groove adapted to the gear 28, and the buffer 25 and the gear 28 are meshed with each other;

[0040] A driving member 210 is fixedly sleeved on the outer surface of the first rotating shaft 29 at one end, and a first elastic column 211 is fixedly connected to the side of the mounting groove 21 close to the driving member 210, and a driven member 212 is fixedly connected to the other end of the first elastic column 211, and a cleaning member 213 is fixedly installed on the top of the driven member 212, and the bottom of the cleaning member 213 is in active contact with the surface of the grate screening member 2, and a groove matching the driven member 212 is opened on the surface of the grate screening member 2, and a baffle 214 is arranged above the groove, and the baffle 214 is fixedly connected to the cleaning member 213, and an eccentric wheel 215 is fixedly installed on the outer surface of the first rotating shaft 29 away from the driving member 210.

[0041] Specifically, when in use, the present invention has the same process as that of the heavy-duty screen in the prior art. First, according to the working parameter range of the heavy-duty screen in the present invention, the stones are pre-screened, and the stones that do not meet the working parameter range of the heavy-duty screen in the present invention are pre-screened to avoid damage to the heavy-duty screen by oversized stones, so as to ensure the screening efficiency and the service life of the heavy-duty screen. Then, the pre-screened stones are transported to the inner cavity of the screen box 13 by the chain plate feeder 12 for vibration screening. During the screening process, the stones will gradually move downward. When the large stones enter the surface of the next grate screen component 2 from the surface of the previous grate screen component 2, they will first contact the receiving component 27. Under the pressure of the large stones, the receiving component 27 will move downward.

[0042] When the receiving member 27 moves downward, it will squeeze the buffer member 25, so that the buffer member 25 squeezes the first return spring 24 and the buffer spring 26, and the receiving member 27 is buffered by the resistance provided by the first return spring 24 and the buffer spring 26, thereby reducing the speed of the large stone when it descends, and the force when it contacts the surface of the grate screening member 2, thereby reducing the damage to the surface of the grate screening member 2 and improving the service life of the grate screening member 2. In addition, it can reduce the noise and dust generated when the large stone falls on the grate screening member 2, optimize the construction environment, on the other hand, reduce the descending speed of the large stone, so that the stone with a volume close to the screen slot has more time to move, increase the distance between it and the large stone, and avoid being squeezed by the large stone and stuck in the screen slot, resulting in blockage of the screen slot, thereby improving the screening efficiency;

[0043] Furthermore, when the large stone squeezes the receiving member 27 and causes the receiving member 27 to move downward, the receiving member 27 squeezes the buffer member 25 and moves downward together. When the buffer member 25 moves downward, it drives the gear 28 to rotate. The gear 28 can drive the first rotating shaft 29 to rotate, so that the first rotating shaft 29 drives the driving member 210 to rotate. When the driving member 210 rotates, it can drive the driven member 212. At this time, the first elastic column 211 will be stretched and deformed to provide a stroke for the driven member 212. When the driven member 212 moves, it will drive the cleaning member 213 to move, so that the cleaning member 213 can clean the stones close to the sieve slot before the large stone falls, further reducing the probability that the small stones are squeezed by the large stones and blocked.

[0044] Furthermore, when the first rotating shaft 29 rotates, the eccentric wheel 215 is driven to rotate, so that the eccentric wheel 215 touches the inner wall of the installation groove 21, thereby increasing the vibration frequency of the grate screening element 2, so that the stones at the grate screening element 2 receiving the stones fall faster, and can be moved away before the large stones fall, further preventing the probability of small stones being squeezed by large stones and blocked;

[0045] It should be noted that the baffle 214 can be provided on both sides of the cleaning member 213 to prevent gravel from entering the installation groove 21 .

[0046] Example 2: Please refer to Figure 3 , Figures 6 to 10 A crushing assembly is arranged in the mounting groove 21, and the crushing assembly includes a reinforcing steel 3 fixedly installed in the mounting groove 21, the reinforcing steel 3 connects two sides of the mounting groove 21, and sliders 31 are slidably installed on both sides of the upper surface of the reinforcing steel 3, and a first fixing plate 32 is fixedly installed on the top of the slider 31;

[0047] A second elastic column 33 is provided between the two first fixing plates 32, and both ends of the second elastic column 33 are fixedly connected to the two first fixing plates 32 respectively. A crushing member 34 is fixedly installed on one side of the first fixing plate 32 away from the second elastic column 33. A through groove 39 adapted to the first fixing plate 32 is provided on the surface of the grate screening member 2. A wedge-shaped member 35 is fixedly installed at the bottom of the receiving member 27, and the bottom of the receiving member 27 is located in the gap between the two first fixing plates 32.

[0048] A second return spring 36 is fixedly installed on both sides of the installation groove 21, and the other end of the second return spring 36 is fixedly connected to a second fixing plate 37, and a first contact member 38 is fixedly installed on one side of the second fixing plate 37. The wedge member 35 is located just above the middle of the gap between the two second fixing plates 37;

[0049] The crushing piece 34 is made of fine steel and has a sawtooth shape;

[0050] The shape of the slider 31 is T-shaped, and a T-shaped slide groove matched with the slider 31 is provided inside the reinforcing steel 3, and lubricating oil is provided in the slide groove.

[0051] On the basis of Example 1, when the receiving member 27 moves downward, it will drive the wedge member 35 to move downward, so that the wedge member 35 squeezes the two first fixed plates 32. At this time, the two sliders 31 will drive the two second elastic columns 33 to move. At the same time, the second elastic columns 33 are stretched and deformed to provide a stroke for the second elastic columns 33. When the second elastic columns 33 move, they will drive the crushing member 34 to move, so that the crushing member 34 enters the sieve slot. The crushing member 34 can be used to squeeze and crush the stones that may be blocked in the sieve slot, so as to avoid continuous blockage of the stones, thereby improving the screening efficiency.

[0052] Furthermore, when the wedge-shaped member 35 continues to descend, it will squeeze the second fixed plate 37. At this time, the second return spring 36 will be compressed and deformed to provide a stroke for the second fixed plate 37, so that the first contact member 38 can touch the inner wall of the mounting groove 21, thereby further increasing the vibration frequency of the grate screening member 2 at the point where the stone is received, and further increasing the falling speed of smaller stones, ensuring that when large stones fall to the surface of the grate screening member 2, there are no other stones at the bottom, thereby avoiding stone blockage caused by squeezing.

[0053] Example 3: Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 The first rotating shaft 29 is provided with a frequency increasing assembly, which includes a convergence wheel 4. The number of the convergence wheels 4 is two and they are fixedly mounted on both sides of the outer surface of the first rotating shaft 29 respectively;

[0054] The outer surface of the tightening wheel 4 is fixedly connected with an elastic rope 41, and the outer surface of the elastic rope 41 is movably installed with a fixing buckle 42, the number of the fixing buckles 42 is greater than one, and the fixing buckle 42 is fixedly connected to the bottom of the grate screening element 2, and the outer surface of the elastic rope 41 is fixedly installed with a steel ball 43;

[0055] A dredging assembly is disposed in the mounting groove 21, and the dredging assembly includes a pressure head 5, and the pressure head 5 is located below the buffer member 25 on the side away from the driving member 210;

[0056] A second rotating shaft 51 is fixedly installed in the middle of the pressure head 5, and the second rotating shaft 51 is movably installed with the grate screening element 2, and both ends of the second rotating shaft 51 pass through the installation slot 21 and extend to the outside of the installation slot 21, and both ends of the second rotating shaft 51 are fixedly installed with a dredging member 52, and a second contact member 53 is fixedly installed at the bottom of the dredging member 52, and a tooth opening 6 is opened on the upper surface of the grate screening element 2;

[0057] The second contact member 53 is L-shaped, and a metal buffer layer is disposed on the outer surface of the second contact member 53 .

[0058] On the basis of Example 1, when stones with a smaller volume are cleaned, the moving speed will be accelerated, which may easily lead to insufficient screening and increase the screening load of the screening slot;

[0059] The tooth opening 6 can be used to decelerate the stone when the smaller stone leaves the stone receiving portion on the surface of the grate screening element 2, that is, the portion close to the receiving member 27, and the first rotating shaft 29 can drive the tightening wheel 4 to rotate, so that the tightening wheel 4 tightens the elastic rope 41. At this time, the elastic rope 41 will become tighter from loose, so that the steel ball 43 touches the bottom of the grate screening element 2, thereby increasing the vibration frequency of the grate screening element 2 away from the receiving member 27, so as to fully screen the stone and improve the screening effect;

[0060] Furthermore, when the buffer member 25 moves downward, it will squeeze the pressure head 5, thereby causing the second rotating shaft 51 to rotate and the clearing member 52 to rotate upward, so that the clearing member 52 can enter the sieve slot, thereby clearing the sieve slot to avoid blockage. When the clearing member 52 rotates to the maximum stroke, the second touch member 53 will contact the bottom of the grate screening member 2, increasing the vibration frequency of the grate screening member 2 away from the receiving member 27, thereby further improving the screening efficiency.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibrating screening device for a heavy-duty screen, comprising a frame (1), a traveling mechanism (11), a chain plate feeder (12) and a screen box (13), wherein the traveling mechanism (11) is mounted at the bottom of the frame (1), the chain plate feeder (12) is fixedly mounted on the frame (1), and the screen box (13) is located on one side of the chain plate feeder (12), characterized in that: A receiving assembly is arranged in the screen box (13), the receiving assembly comprising a buffer module and a cleaning module, the buffer module and the cleaning module cooperate with each other to improve the screening efficiency; The buffer module comprises a grate screening element (2), the grate screening element (2) being fixedly mounted inside a screen box (13), a mounting groove (21) being provided at one end inside the grate screening element (2), steel columns (22) being fixedly mounted on both left and right sides of the bottom of the mounting groove (21), a limit block (23) being fixedly mounted on the top of the steel column (22), a first return spring (24) being sleeved on the outer peripheral side of the steel column (22), a buffer element (25) being movably mounted on the outer surface of the steel column (22), a buffer spring (26) being fixedly connected to the bottom of the buffer element (25), an end of the buffer spring (26) away from the buffer element (25) being fixedly connected to the bottom of the mounting groove (21), and a receiving element (27) being fixedly mounted on the top of the buffer element (25); The cleaning module comprises a gear (28), a first rotating shaft (29) is fixedly mounted in the middle of the gear (28), the first rotating shaft (29) is movably mounted in the mounting groove (21), a tooth groove matching the gear (28) is formed on the surface of the buffer (25), and the buffer (25) and the gear (28) are meshed with each other; A driving member (210) is fixedly sleeved on the outer surface of the first rotating shaft (29) at one end, a first elastic column (211) is fixedly connected to a side of the mounting groove (21) close to the driving member (210), a driven member (212) is fixedly connected to the other end of the first elastic column (211), a cleaning member (213) is fixedly mounted on the top of the driven member (212), the bottom of the cleaning member (213) is in active contact with the surface of the grate screening member (2), a notch matching the driven member (212) is provided on the surface of the grate screening member (2), a baffle (214) is provided above the notch, the baffle (214) is fixedly connected to the cleaning member (213), and an eccentric wheel (215) is fixedly mounted on the outer surface of the first rotating shaft (29) on the side away from the driving member (210); A crushing assembly is arranged in the installation groove (21), and the crushing assembly comprises a reinforcing steel (3) fixedly installed in the installation groove (21), the reinforcing steel (3) connecting two sides of the installation groove (21), sliding blocks (31) are slidably installed on both sides of the upper surface of the reinforcing steel (3), and a first fixing plate (32) is fixedly installed on the top of the sliding block (31); A second elastic column (33) is arranged between the two first fixing plates (32), and both ends of the second elastic column (33) are respectively fixedly connected to the two first fixing plates (32); a crushing member (34) is fixedly installed on one side of the first fixing plate (32) away from the second elastic column (33); a through groove (39) adapted to the first fixing plate (32) is provided on the surface of the grate screening member (2); a wedge-shaped member (35) is fixedly installed on the bottom of the receiving member (27); and the bottom of the receiving member (27) is located in the gap between the two first fixing plates (32); A second return spring (36) is fixedly mounted on both sides of the mounting groove (21); the other end of the second return spring (36) is fixedly connected to a second fixing plate (37); a first contact member (38) is fixedly mounted on one side of the second fixing plate (37); and the wedge member (35) is located directly above the middle of the gap between the two second fixing plates (37); A frequency increasing component is arranged on the first rotating shaft (29), and the frequency increasing component comprises a convergence wheel (4). The convergence wheels (4) are two in number and are respectively fixedly mounted on two sides of the outer surface of the first rotating shaft (29); An elastic rope (41) is fixedly connected to the outer surface of the tightening wheel (4), and a fixing buckle (42) is movably mounted on the outer surface of the elastic rope (41). The number of the fixing buckles (42) is greater than one, and the fixing buckle (42) is fixedly connected to the bottom of the grate screening element (2). A steel ball (43) is fixedly mounted on the outer surface of the elastic rope (41).

2. The vibrating screening device for heavy-duty screens according to claim 1, characterized in that: A dredging component is arranged in the installation groove (21), and the dredging component comprises a pressure head (5), and the pressure head (5) is located below the buffer member (25) on a side away from the driving member (210); A second rotating shaft (51) is fixedly mounted in the middle of the pressure head (5), the second rotating shaft (51) is movably mounted between the grate screening element (2), and both ends of the second rotating shaft (51) penetrate the mounting groove (21) and extend to the outside of the mounting groove (21), both ends of the second rotating shaft (51) are fixedly mounted with a dredging element (52), a second contact element (53) is fixedly mounted at the bottom of the dredging element (52), and a tooth opening (6) is provided on the upper surface of the grate screening element (2).

3. The vibrating screening device for heavy-duty screens according to claim 2, characterized in that: The second touching member (53) is L-shaped, and a metal buffer layer is provided on the outer surface of the second touching member (53).

4. The vibrating screening device for heavy-duty screens according to claim 3, characterized in that: The diameter of the limit block (23) is greater than the diameter of the steel column (22); the bottom of the first return spring (24) is fixedly connected to the bottom of the installation groove (21); and the top of the first return spring (24) is fixedly connected to the buffer component (25).

5. The vibrating screening device for heavy-duty screens according to claim 4, characterized in that: The crushing piece (34) is made of fine steel and is sawtooth-shaped.

6. The vibrating screening device for heavy-duty screens according to claim 5, characterized in that: The shape of the sliding block (31) is T-shaped, and a T-shaped sliding groove matching the sliding block (31) is provided inside the reinforcing steel (3), and lubricating oil is provided in the sliding groove.

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