A type of bouncing screen with a variable tilt angle during operation

Abstract

This application discloses a bouncing screen with a variable tilt angle of the screen plate during operation. The screen plate can change its tilt angle during movement, enabling not only the screening of coarse and fine materials but also the breaking down and separating of light and heavy materials, thus improving work efficiency and broadening its application range. The bouncing screen includes: a frame, a screen plate system, an eccentric rotation system, a drive system, and a conveying system. The frame provides space for the screen plate system, eccentric rotation system, drive system, and conveying system. The screen plate system has multiple screen plates arranged sequentially along a second direction, with the screen plates forming an angle with the ground. Each screen plate is correspondingly equipped with an eccentric rotation system connected to the second screen plate end face, used to drive the screen plate in reciprocating motion to achieve material screening. The drive system drives each eccentric wheel to rotate, providing power to the eccentric rotation system. The conveying system transports the material screened by the screen plate system.

Description

Technical Field

[0001] This application relates to the field of screening equipment technology, and more specifically, to a bouncing screen with a screen plate tilt angle that can be adjusted during operation. Background Technology

[0002] Currently, screening equipment on the market includes drum screens, vibrating screens, and bouncing screens. Among them, bouncing screens are suitable for screening construction waste and are widely used. In existing technology, the main body of a bouncing screen consists of three parts: the screen plate is tilted by the frame, the motor drives the eccentric rotating mechanism to generate motion, and the motion is transmitted to the screen plate through the eccentric rotating mechanism, causing the screen plate to generate an elliptical motion trajectory. This not only completes the screening function of coarse and fine materials, but also disperses and separates light and heavy materials. However, when screening materials with different moisture contents and different types of materials in environments with different altitudes and humidity levels, the screen plate tilt angle corresponding to the highest screening efficiency is different. When materials first enter the screening machine, they are in an agglomerated state. After entering the screening machine, they are dispersed. The screening efficiency of agglomerated materials is different from that of dispersed materials. Dispersing the materials significantly reduces the interaction force between them, and the downward movement speed of heavy materials and the upward movement speed of light materials also increase accordingly. In existing technologies, the tilt angle of the screen plate in a bouncing screen is generally controlled by the structural design of the frame, and the tilt angle of the screen plate does not change during the operation of the bouncing screen. If the composition of construction waste is complex and the screening environment cannot be maintained, the constant tilt angle of the screen plate during the operation of the bouncing screen will not be able to adapt to the screening of most materials and will reduce the screening efficiency. Summary of the Invention

[0003] This application provides a bouncing screen with a variable tilt angle of the screen plate during operation. The tilt angle of the screen plate can change during the movement, which can not only screen coarse and fine materials, but also break up and separate light and heavy materials. It solves the problem in the prior art that the tilt angle of the screen plate does not change during the operation of the bouncing screen, which makes it unable to adapt to the screening of most materials. It improves work efficiency and has a wider range of applications.

[0004] The specific technical solution is as follows:

[0005] This application provides a bouncing screen with a variable tilt angle of the screen plate during operation, including:

[0006] A frame, wherein the frame is provided with a cavity structure with openings at both ends, the cavity structure including a first opening end and a second opening end, the first opening end being the opening end of the cavity structure close to the ground along a first direction, and the second opening end being the opening end of the cavity structure away from the ground along the first direction;

[0007] A sieve plate system, wherein the sieve plate system is disposed within the cavity structure, the sieve plate system comprising:

[0008] A sieve plate, wherein a plurality of sieve plates are provided in the cavity structure, and the sieve plates are disposed near the second opening end. The plurality of sieve plates are arranged sequentially along the second direction, and the sieve plates are disposed at an angle to the ground. The sieve plate includes a first sieve plate end face and a second sieve plate end face. The first sieve plate end face is the end face of the sieve plate away from the ground, and the second sieve plate end face is the end face of the sieve plate close to the ground.

[0009] An eccentric rotation system is provided for each of the screen plates. The eccentric rotation system is disposed within the cavity structure and connected to the second end face of the screen plate, for driving the screen plate to reciprocate. The eccentric rotation system includes:

[0010] An eccentric wheel is disposed within the cavity structure;

[0011] A connecting plate is disposed on the second end face of the sieve plate. A first sliding groove is provided on the side surface of the connecting plate away from the sieve plate, and the first sliding groove extends along the long side of the sieve plate.

[0012] A fixing block is fixedly disposed at the first end of the first groove;

[0013] A slider, which is slidably disposed at the second end of the first groove;

[0014] The first fixing rod is fixedly installed inside the cavity structure;

[0015] The second fixing rod is fixedly installed inside the cavity structure. The first fixing rod and the second fixing rod are arranged sequentially along a third direction, and the height of the second fixing rod is less than the height of the first fixing rod.

[0016] The first diagonal brace has one end rotatably connected to the first fixed rod and the other end rotatably connected to the fixed block. A second sliding groove is provided in the middle of the first diagonal brace. The second sliding groove extends along the long side of the first diagonal brace and penetrates the opposite two side surfaces of the first diagonal brace.

[0017] The second diagonal brace has one end rotatably connected to the second fixed rod and the other end rotatably connected to the slider. A third sliding groove is provided in the middle of the second diagonal brace. The third sliding groove extends along the long side of the second diagonal brace and penetrates the opposite two sides of the second diagonal brace.

[0018] A sliding shaft, wherein the first diagonal brace and the second diagonal brace are sequentially passed through the sliding shaft, and the sliding shaft is slidably disposed in the second sliding groove and the third sliding groove;

[0019] A push rod, one end of which is connected to one end of the sliding shaft;

[0020] The mating wheel is rotatably connected to the other end of the push rod, and the mating wheel abuts against the eccentric wheel. When the eccentric wheel rotates, the eccentric wheel drives the push rod to reciprocate along the first direction through the mating wheel.

[0021] The cavity structure contains two support rods, which are arranged sequentially along the third direction and located on both sides of the eccentric wheel. Each support rod has a mounting groove at the end away from the ground in the first direction, and the mounting groove penetrates the opposite two sides of the support rod.

[0022] Each of the mounting slots has a support wheel that is rotatably disposed therein.

[0023] A movable rod has two mounting slots of the two support rods respectively passing through its two ends. A limiting groove is provided at the end of the movable rod near the first fixed rod, penetrating both opposite surfaces of the movable rod. A U-shaped groove is provided at the end of the movable rod near the second fixed rod, with the opening end of the U-shaped groove positioned along the third direction and facing outwards from the movable rod. In the first direction, two fourth sliding grooves are provided on the surface of the movable rod near the ground. The positions of the two fourth sliding grooves correspond one-to-one with the positions of the two mounting slots. Each support wheel in the mounting slot slides within the fourth sliding groove.

[0024] The moving rod is fixedly connected to two limiting rods, which extend along the first direction and are located on opposite sides of the eccentric wheel in the third direction, respectively abutting against the eccentric wheel. When the eccentric wheel rotates, the eccentric wheel drives the moving rod to reciprocate along the third direction through the two limiting rods.

[0025] Connecting blocks: Two connecting blocks are provided on the second end face of the sieve plate, and the two connecting blocks are arranged sequentially along the long side of the sieve plate, and the two connecting blocks are respectively located on both sides of the connecting plate;

[0026] The first connecting rod has one end slidably disposed in the limiting groove near the first fixed rod, and the other end of the first connecting rod is rotatably connected to the connecting block near the first fixed rod.

[0027] A limiting shaft, the two ends of which are respectively rotatably disposed in the U-shaped groove, and the limiting shaft extends along the second direction;

[0028] The second connecting rod has a fifth sliding groove that extends along the long side of the second connecting rod. The limiting shaft is slidably disposed in the fifth sliding groove. One end of the second connecting rod is rotatably connected to the connecting block near the second fixed rod.

[0029] A drive system for driving each of the eccentric wheels to rotate, the drive system comprising:

[0030] An electric motor, which is mounted on the frame;

[0031] The motor is connected to the eccentric wheel of each of the eccentric rotation systems via the speed reducer, driving the eccentric wheel to rotate;

[0032] A conveying system for conveying the material screened by the screen plate system, the conveying system comprising:

[0033] In the first direction, two conveyor belts are arranged between the frame and the ground. The two conveyor belts are arranged sequentially along the third direction, and each conveyor belt extends along the second direction. The position of each conveyor belt corresponds to the position of the first opening end, and the projection of each sieve plate in the first direction is located on the two conveyor belts respectively.

[0034] Wherein, the first direction, the second direction, and the third direction are mutually perpendicular, and the first direction is a direction perpendicular to the ground.

[0035] In some embodiments of this application, the sieve plate system further includes:

[0036] Side baffles: In the second direction, each of the first screen plate end faces of the screen plate is provided with a side baffle at the two opposite edges, the two side baffles are symmetrically arranged, and each side baffle has a sawtooth structure.

[0037] The screen plate has N baffles evenly spaced on the first screen plate end face of each screen plate. The cross-sectional shape of the baffle is the same as the single tooth shape of the side baffle. The N baffles and the two side baffles divide the first screen plate end face of the screen plate into N-1 screening areas.

[0038] In some embodiments of this application, each screening area other than the screening areas at both ends of the sieve plate is provided with two sets of sieve holes. Each set of sieve holes is located at both ends of the screening area along the second direction. The sieve holes penetrate the first end face and the second end face of the sieve plate. The projection of the eccentric rotation system corresponding to each sieve plate in the first direction is located between the projections of the two sets of sieve holes in each screening area of ​​the sieve plate in the first direction.

[0039] In some embodiments of this application, the sieve plate system further includes:

[0040] The first partition is provided on the second screen plate end face of each screen plate. The length of each first partition is the same as the length of the screen plate. The two first partitions are respectively provided on both sides of the eccentric rotation system in the second direction. The projection of each first partition in the first direction is located between the projection of the eccentric rotation system and the projection of the two sets of screen plates in the first direction. Each first partition is fixedly connected to the end face of the second screen plate by multiple bolts. A gasket is provided between the first partition and the screen plate.

[0041] The second partition is provided on each of the two sides of the screen plate along the third direction. The second partition is connected to the screen plate by a pin, and each second partition is located between two first partitions. The width of the second partition is the same as the distance between the two first partitions.

[0042] In some embodiments of this application, the single tooth shape of the side baffle is triangular, and the three angles of the triangle are 75°, 60° and 45°, respectively. The 45° angle faces the direction from the first link to the second link, and the 75° angle faces the direction from the second link to the first link.

[0043] In some embodiments of this application, there is a 180° phase difference between two adjacent eccentric wheels.

[0044] In some embodiments of this application, the rack includes:

[0045] The frame body is a rectangular cylindrical structure with openings at both ends, and the cavity structure is disposed within the frame body;

[0046] Mounting bracket, the mounting bracket is provided on the first side surface of the frame body, and the motor and the reducer are mounted on the mounting bracket;

[0047] A dustproof baffle is disposed on the first side surface of the frame body, and the position of the dustproof baffle corresponds to the position of the mounting bracket.

[0048] The first support column has an L-shaped vertical section. One first support column is provided at each of the two corners of the first side surface of the frame body near the ground. The horizontal part of each first support column is connected to the first side surface of the frame body, and the vertical part of each first support column is fixed by anchor bolts.

[0049] The second support column is provided at two corners away from the first support column on the second side surface of the frame body. Each second support column is fixed by the anchor bolts, and the anchor bolts of each second support column are on the same horizontal plane as the anchor bolts of each first support column.

[0050] Wherein, the first side surface of the rack body is one side surface of the rack body in the second direction, and the second side surface of the rack body is the side surface of the rack body closer to the ground.

[0051] In some embodiments of this application, a connecting reinforcing rib is provided between the mounting frame and each of the first support columns.

[0052] In some embodiments of this application, the rotational speed of the eccentric wheel is 140 r / min.

[0053] In some embodiments of this application, when the sieve plate is at its highest point in the first direction, the angle between the sieve plate and the ground is 9.3°, and when the sieve plate is at its lowest point in the first direction, the angle between the sieve plate and the ground is 13°.

[0054] The beneficial effects of the embodiments of this application are as follows:

[0055] This bouncing screen creates a path difference between the two ends of the screen plate along a first direction within the same motion cycle, thereby changing the tilt angle of the screen plate during movement. This solves the problem in existing technologies where the tilt angle of the screen plate remains constant during operation, making it unsuitable for screening most materials. Furthermore, this bouncing screen can not only screen coarse and fine materials but also break down and separate light and heavy materials, improving work efficiency and broadening its application range. In addition, the serrated structure design in the screen plate system not only provides power for the upward movement of materials but also reduces the impact on the downward movement, significantly improving the screening efficiency of the bouncing screen. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This application provides a schematic diagram of the structure of a bouncing screen with a variable tilt angle of the screen plate during operation, as provided in an embodiment of the present application.

[0058] Figure 2 A top view schematic diagram of a bouncing screen with a variable tilt angle of the screen plate during operation, provided as an embodiment of this application;

[0059] Figure 3 A schematic diagram of the structure of a sieve plate system and eccentric rotation system of a sieve plate tilting angle variable during operation, provided for an embodiment of this application;

[0060] Figure 4 An enlarged schematic diagram of the support wheel portion of a bouncing screen with a variable tilt angle of the screen plate during operation, provided in an embodiment of this application;

[0061] Figure 5 This is a schematic diagram of the structure of a bouncing screen with a variable tilt angle during operation, provided in an embodiment of this application, in which the screen plate system without the first and second partitions is installed and the eccentric rotation system is at the highest point in the first direction.

[0062] Figure 6 This is a schematic diagram of the structure of a bouncing screen with a variable tilt angle during operation, provided in an embodiment of this application, in which the screen plate system without the first and second partitions and the eccentric rotation system are at the lowest point in the first direction.

[0063] Figure 7 This application provides a schematic diagram of the structure of a sieve plate in a bouncing sieve with a variable tilt angle during operation, as shown in the embodiment of the present application.

[0064] Figure 8 A schematic diagram of a partially serrated structure of a bouncy screen with a variable tilt angle during operation, provided as an embodiment of this application;

[0065] Figure 9 A schematic diagram of the structure of an eccentric wheel in a bouncing screen with a variable tilt angle of the screen plate during operation, provided in an embodiment of this application;

[0066] Figure 10This is a schematic diagram of the structure of a sieve plate system and an eccentric rotation system for a bouncy sieve with a variable sieve plate tilt angle during operation, provided in an embodiment of this application.

[0067] Figure 11 An enlarged schematic diagram of the structure of the first and second partitions in a bouncing screen with a variable tilt angle during operation, provided in an embodiment of this application;

[0068] In the attached drawings, 100 is the frame, 101 is the frame body, 1011 is the first side surface of the frame body 101, 1012 is the second side surface of the frame body 101, 102 is the mounting frame, 103 is the dustproof baffle, 104 is the first support column, 1041 is the horizontal part of the first support column 104, 1042 is the vertical part of the first support column 104, 105 is the second support column, 106 is the connecting reinforcing rib, 107 is the cavity structure, 1071 is the second opening end of the cavity structure 107, 108 is the mounting plate, 200 is the sieve plate system, 201 is the sieve plate, 2011 is the first sieve plate end face of the sieve plate 201, 2012 is the second sieve plate end face of the sieve plate 201, 2013 is the screening area, 202 is the side baffle, 203 is the plate surface baffle, 204 is the first partition, 205 is the second partition, and 206 is the... Screen holes, 207 is a bolt, 208 is a pin, 300 is an eccentric rotation system, 301 is an eccentric wheel, 302 is a connecting plate, 303 is a fixing block, 304 is a slider, 305 is the first fixing rod, 306 is the second fixing rod, 307 is the first diagonal brace, 3071 is the second slide groove, 308 is the second diagonal brace, 3081 is the third slide groove, 309 is the second connecting rod, 3091 is the fifth slide groove, 3 10 is the top rod, 311 is the mating wheel, 312 is the support rod, 3121 is the mounting slot, 313 is the support wheel, 314 is the moving rod, 3141 is the fourth sliding groove, 3142 is the U-shaped groove, 315 is the limiting rod, 316 is the connecting block, 317 is the first connecting rod, 318 is the base, 400 is the drive system, 401 is the motor, 402 is the reducer, 500 is the conveying system, and 501 is the conveyor belt. Detailed Implementation

[0069] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0070] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The terms "comprising" and "having," and any variations thereof, in the embodiments and drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0071] This application discloses a bouncing screen with a variable tilt angle of the screen plate during operation. Detailed descriptions follow.

[0072] Figure 1 – Figure 11 This illustration shows a bouncing screen with a variable tilt angle of the screen plate during operation, according to an embodiment of this application. For example... Figure 1 – Figure 11 As shown, the bouncing screen mainly includes: a frame 100, a screen plate system 200, an eccentric rotation system 300, a drive system 400, and a conveying system 500. The frame 100 is the main structure of the bouncing screen and is mainly used to provide installation positions for the screen plate system 200, the eccentric rotation system 300, the drive system 400, and the conveying system 500. The screen plate system 200, the eccentric rotation system 300, and the drive system 400 are important parts of the bouncing screen. The screen plate system 200 is used to screen materials. The eccentric rotation system 300 is connected to the screen plate system 200 and is used to drive the screen plate system 200 to move, realizing the change of the tilt angle of the screen plate 201 during the movement. The drive system 400 is connected to the eccentric rotation system 300 and is used to drive the eccentric rotation system 300 to move, thereby driving the screen plate system 200 to move. The conveying system 500 is used to convey the material screened by the screen plate system 200.

[0073] In one embodiment, such as Figure 1 As shown, the frame 100 is provided with a cavity structure 107 with openings at both ends. The cavity structure 107 mainly provides installation positions for the screen plate system 200 and the eccentric rotation system 300, and also protects the screen plate system 200 and the eccentric rotation system 300. Specifically, the cavity structure 107 includes a first open end (not shown in the figure) and a second open end 1071. The first open end is the opening end of the cavity structure 107 close to the ground along a first direction, and the second open end 1071 is the opening end of the cavity structure 107 away from the ground along the first direction. The screen plate system 200 and the eccentric rotation system 300 are disposed within the cavity structure 107, and in the first direction, the screen plate system 200 is disposed closer to the second open end 1071, and the eccentric rotation system 300 is disposed closer to the first open end 1072.

[0074] like Figure 1 , Figure 3 and Figure 5 – Figure 8 As shown, the sieve plate system 200 is one of the important systems of the bouncing screen, used to realize the material screening function of the bouncing screen. Specifically, the sieve plate system 200 in this embodiment mainly includes multiple sieve plates 201, which are disposed in the cavity structure 107 and near the second opening end 1071 of the cavity structure 107. Further, the multiple sieve plates 201 are arranged sequentially along the second direction, and the sieve plates 201 are set at an angle to the ground. In addition, the sieve plate 201 includes a first sieve plate end face 2011 and a second sieve plate end face 2012. The first sieve plate end face 2011 is the end face of the sieve plate 201 away from the ground, and the material is screened through the first sieve plate end face 2011. The second sieve plate end face 2012 is the end face of the sieve plate 201 near the ground and is used for the connection between the sieve plate 201 and the eccentric rotation system 300.

[0075] like Figure 1 and Figure 3 – Figure 6As shown, the eccentric rotation system 300 is one of the important systems of the bouncing screen, used to drive the screen plate system 200. In this embodiment, each screen plate 201 is respectively provided with an eccentric rotation system 300. The eccentric rotation system 300 is disposed in the cavity structure 107 and is connected to the second screen plate end face 2012 of the screen plate 201. Through the movement of its own structure, it drives the screen plate 201 to reciprocate, so that the screen plate 201 can screen materials. During the movement of the screen plate 201, the tilt angle of the screen plate 201 is changed to adapt to the screening of more types of materials and improve the screening efficiency of the bouncing screen. Specifically, the eccentric rotation system 300 mainly includes an eccentric wheel 301, a connecting plate 302, a fixing block 303, a slider 304, a first fixing rod 305, a second fixing rod 306, a first diagonal brace 307, a second diagonal brace 308, a sliding shaft (not shown in the figure), a top rod 310, a mating wheel 311, a support rod 312, a support wheel 313, a moving rod 314, a limiting rod 315, a connecting block 316, a first connecting rod 317, a limiting shaft (not shown in the figure), and a second connecting rod 309. The eccentric wheel 301 is the connecting component between the eccentric rotation system 300 and the drive system 400. The eccentric wheel 301 is disposed within the cavity structure 107 and is located near the first opening end 1072.A connecting plate 302 is disposed on the second sieve plate end face 2012 of the sieve plate 201. A first sliding groove (not shown in the figure) is provided on the side surface of the connecting plate 302 away from the sieve plate 201, and the first sliding groove extends along the long side of the sieve plate 201. A fixing block 303 is fixedly disposed at the first end of the first sliding groove, and a slider 304 is slidably disposed at the second end of the first sliding groove. A first fixing rod 305 is fixedly disposed in the cavity structure 107, and a second fixing rod 306 is fixedly disposed in the cavity structure 107. The first fixing rod 305 and the second fixing rod 306 are arranged sequentially along the third direction. The height of the second fixed rod 306 is less than the height of the first fixed rod 305; one end of the first diagonal brace 307 is rotatably connected to the first fixed rod 305, and the other end of the first diagonal brace 307 is rotatably connected to the fixed block 303. A second sliding groove 3071 is provided in the middle of the first diagonal brace 307, extending along the long side of the first diagonal brace 307 and penetrating both opposite surfaces of the first diagonal brace 307; one end of the second diagonal brace 308 is rotatably connected to the second fixed rod 306, and the other end of the second diagonal brace 308 is rotatably connected to the slider 304. Furthermore, a third sliding groove 3081 is provided in the middle of the second diagonal brace 308. The third sliding groove 3081 extends along the long side of the second diagonal brace 308 and penetrates the opposite two side surfaces of the second diagonal brace 308. The sliding shaft passes through the first diagonal brace 307 and the second diagonal brace 308 in sequence and slides in the second sliding groove 3071 and the third sliding groove 3081. One end of the push rod 310 is connected to one end of the sliding shaft, and the mating wheel 311 is rotatably connected to the other end of the push rod 310. The mating wheel 311 abuts against the eccentric wheel 301. When the eccentric wheel 301 rotates, the eccentric wheel 308... 01 The top rod 310 is driven to reciprocate in the first direction by the mating wheel 311. The top rod 310 drives the screen plate 201 to reciprocate in the first direction through the cooperation of the first inclined support rod 307 and the second inclined support rod 308. At the same time, since the second inclined support rod 308 is slidably installed in the first groove of the connecting plate 302 through the slider 304, and the first inclined support rod 307 is fixed on the connecting plate 302 through the fixing block 303, the screen plate 201 can not only reciprocate in the first direction during operation, but also change the angle of inclination between the screen plate 201 and the ground.Two support rods 312 are fixedly installed inside the cavity structure 107. The two support rods 312 are arranged sequentially along a third direction and are located on both sides of the eccentric wheel 301. Each support rod 312 has a mounting slot 3121 at the end away from the ground in the first direction, and the mounting slot 3121 penetrates the opposite two side surfaces of the support rod 312. A support wheel 313 is rotatably installed in each mounting slot 3121. The two ends of the moving rod 314 pass through the mounting slots 3121 of the two support rods 312, and the end of the moving rod 314 near the first fixed rod 305 is provided with a limit groove. (Not shown in the figure) The limiting groove penetrates the opposite two sides of the moving rod 314. A U-shaped groove 3142 is provided at one end of the moving rod 314 near the second fixed rod 306. The open end of the U-shaped groove 3142 is arranged along the third direction and faces the outside of the moving rod 314. In the first direction, two fourth sliding grooves 3141 are provided on the side surface of the moving rod 314 near the ground. The positions of the two fourth sliding grooves 3141 correspond one-to-one with the positions of the two mounting through grooves 3121. The support wheel 313 in each mounting through groove 3121 slides in the fourth sliding groove 3141; the second screen plate end face 2 of the screen plate 201 Two connecting blocks 316 are provided on the 012, and the two connecting blocks 316 are arranged sequentially along the long side of the sieve plate 201, and the two connecting blocks 316 are respectively located on both sides of the connecting plate 302; one end of the first connecting rod 317 is slidably disposed in the limiting groove near the first fixed rod 305, and the other end of the first connecting rod 317 is rotatably connected to the connecting block 316 near the first fixed rod 305; both ends of the limiting shaft are respectively rotatably disposed in the U-shaped groove 3142, and the limiting shaft extends along the second direction; a fifth sliding groove 3091 is provided on the second connecting rod 309, and the fifth sliding groove 3091 extends along the long side of the second connecting rod 309. The limiting shaft is slidably disposed within the fifth sliding groove 3091. One end of the second connecting rod 309 is rotatably connected to the connecting block 316 near the second fixed rod 306. Two limiting rods 315 are fixedly connected to the moving rod 314. The limiting rods 315 extend along the first direction and are disposed on opposite sides of the eccentric wheel 301 in the third direction, respectively abutting against the eccentric wheel 301. When the eccentric wheel 301 rotates, the eccentric wheel 301 drives the moving rod 314 to reciprocate along the third direction through the two limiting rods 315, and adjusts the movement of the screen plate 201 through the first connecting rod 317 and the second connecting rod 309. In another embodiment, the eccentric rotation system 300 of the bouncing screen may also be provided with two top rods 310 and two mating wheels 311, and the eccentric wheel 301 adopts the following configuration. Figure 9 The structure shown has two push rods 310 respectively located at both ends of the sliding shaft, and each of them is engaged with the eccentric wheel 301 through a mating wheel 311, making the movement process more controllable.

[0076] In this application, the eccentric rotation system 300 achieves the purpose of changing the tilt angle of the screen plate 201 during the same cycle of movement at both ends in the third direction. Specifically, the eccentric rotation system 300 can adjust the fixed position of the fixing block 303 on the connecting plate 302 to regulate the fit between the first inclined support rod 307, the second inclined support rod 308, and the top rod 310. By using the fixing block 303 and the slider 304 to place the connection positions of the first inclined support rod 307 and the second inclined support rod 308 on both sides of the eccentric wheel 301, control over both ends of the screen plate 201 is enhanced. The two top rods 310 fit the contour of the same eccentric wheel 301, making the movement process more controllable. By adjusting the connection positions of the first inclined support rod 307 and the second inclined support rod 308 on the sieve plate 201 and the length of the top rod 310, the tilt angle of the sieve plate 201 during the movement can be adjusted. There are fewer control variables, the adjustment is simpler, and there is no need to optimize the profile of the eccentric wheel 301, which greatly reduces the design difficulty.

[0077] Furthermore, it is important to note that the design of the eccentric wheel 301 profile must consider coordinating the reciprocating motion in the first direction with the reciprocating motion in the third direction. It is also necessary to consider whether the eccentric wheel 301 profile will generate excessive impact force, shortening the lifespan of the equipment or components. The entire motion process should start from the lowest point of the screen plate 201 in the first direction, and push to one of the farthest points of the screen plate 201 in the third direction, where the speed in the first direction is at its maximum, throwing the material off the screen plate 201. The pushing motion then continues, decelerating and transitioning gently to the highest point of the screen plate 201 in the first direction. No far or near pauses are needed; the return stroke is the same as the pushing stroke, returning to the lowest point of the screen plate 201 in the first direction.

[0078] like Figure 1 As shown, the drive system 400 is the power system of the bouncing screen, used to drive each eccentric wheel 301 to rotate. Specifically, the drive system 400 mainly includes a motor 401 and a reducer 402. The motor 401 is mounted on the frame 100, and the motor 401 is connected to the eccentric wheel 301 of each eccentric rotation system 300 through the reducer 402, driving the eccentric wheel 301 to rotate.

[0079] like Figure 1As shown, the conveying system 500 is used to convey the material after screening by the screen plate system 200. Specifically, the conveying system 500 mainly includes conveyor belts 501. In the first direction, two conveyor belts 501 are arranged between the frame 100 and the ground. The two conveyor belts 501 are arranged sequentially along the third direction, and each conveyor belt 501 extends along the second direction. The setting position of each conveyor belt 501 corresponds to the setting position of the first opening end. The projection of each screen plate 201 in the first direction is located on the two conveyor belts 501, so that when the material after screening by the screen plate 201 falls from the two sides of the screen plate 201 in the third direction, it can fall onto the two conveyor belts 501 and be conveyed by the conveyor belts 501. At the same time, since there is a certain time difference in the falling of different types of materials, the conveyor belts 501 can also play a role in further separating materials.

[0080] In this application, the first direction, the second direction, and the third direction are mutually perpendicular, with the first direction being perpendicular to the ground and the second and third directions being parallel to the ground. However, it should be noted and understood that "perpendicular" in this application is not absolutely perpendicular, but can be 90°±10°, and similarly, "horizontal" in this application is not absolutely horizontal, but can be 180°±10°.

[0081] In another embodiment, such as Figure 3 and Figure 7As shown, the sieve plate system 200 also includes side baffles 202 and plate baffles 203. Specifically, in the second direction, each sieve plate 201 has a side baffle 202 disposed at the opposite edges of its first sieve plate end face 2011. The two side baffles 202 are symmetrically arranged, and each side baffle 202 has a serrated structure. N plate baffles 203 are evenly spaced on the first sieve plate end face 2011 of each sieve plate 201. The cross-sectional shape of the plate baffles 203 is the same as the single-tooth shape of the side baffles 202. The N plate baffles 203 and the two side baffles 202 divide the first sieve plate end face 2011 of the sieve plate 201 into N-1 screening areas 2013. Furthermore, except for the screening areas 2013 at both ends of the sieve plate 201, each of the remaining screening areas 2013 is provided with two sets of sieve holes 206. Each set of sieve holes 206 is located at both ends of the screening area 2013 along the second direction, and the sieve holes 206 penetrate the first sieve plate end face 2011 and the second sieve plate end face 2012 of the sieve plate 201. The projection of the eccentric rotation system 300 corresponding to each sieve plate 201 in the first direction is located between the projections of the two sets of sieve holes 206 in the first direction of each screening area 2013 of the sieve plate 201. The structural design of the side baffle 202 and the plate baffle 203 plays an auxiliary role in the screening operation of the sieve plate 201, and through the design of the sieve holes 206, it separates some materials with small particle size and poor rebound effect. Among them, the sieve holes in each set of sieve holes 206 are evenly distributed, and the number of rows, columns and the specific size of the sieve holes can be specifically designed according to the actual situation.

[0082] In some specific implementation processes, such as Figure 7 and Figure 8 As shown, the single tooth shape of the side baffle 202 is triangular, with three angles of 75°, 60°, and 45°. The 45° angle faces the direction from the first connecting rod 317 towards the second connecting rod 309, and the 75° angle faces the direction from the second connecting rod 309 towards the first connecting rod 317. The side baffle 202 adopts a sawtooth structure, and the shape and size of the plate baffle 203 are adapted to the sawtooth structure of the side baffle 202. This not only provides the material with a force to move towards the upper part of the screen plate 201 (i.e., the part of the screen plate 201 near the first connecting rod 317), but also, since the 75° angle is greater than the 45° angle, it is more conducive to providing an upward force to the material, while not affecting the downward movement of heavy materials.

[0083] In the embodiments of this application, such as Figure 10 and Figure 11As shown, the sieve plate system 200 also includes a first partition 204 and a second partition 205. The arrangement of the first partition 204 and the second partition 205 is to prevent the material separated from the sieve hole 206 from falling onto the components of the eccentric rotation system 300 and affecting the movement of the eccentric rotation system 300. In detail, each sieve plate 201 has two first partitions 204 on its second sieve plate end face 2012. The length of each first partition 204 is the same as the length of the sieve plate 201. The two first partitions 204 are respectively located on both sides of the eccentric rotation system 300 in the second direction. The projection of each first partition 204 in the first direction is located between the projection of the eccentric rotation system 300 and the two sets of sieve plates 201 in the first direction. Each first partition 204 is fixedly connected to the second sieve plate end face 2012 by multiple bolts 207. A gasket (not shown in the figure) is provided between the first partition 204 and the sieve plate 201 to avoid damage to the sieve plate 201 by the first partition 204 and the bolts 207, and to enhance the firmness of the first partition 204 fixed on the sieve plate 201. Each screen plate 201 has a second partition 205 on each of its two sides along the third direction. The second partition 205 is connected to the screen plate 201 by a pin 208, and each second partition 205 is located between two first partitions 204. The width of the second partition 205 is the same as the distance between the two first partitions 204. Thus, the arrangement of the two first partitions 204 and the two second partitions 205 isolates the screen holes 206 of the screen plate 201 from the components of the eccentric rotation system 300, preventing material from contaminating and damaging the eccentric rotation system 300.

[0084] In other specific implementation processes, such as Figure 1As shown, the frame 100 mainly includes: a frame body 101, a mounting frame 102, a dustproof baffle 103, two first support columns 104, and two second support columns 105. Specifically, the frame body 101 is a rectangular cylindrical structure open at both ends, with a cavity structure 107 disposed within it. The frame body 101 includes a first side surface 1011 and a second side surface 1012. The first side surface 1011 is one side surface of the frame body 101 in a second direction, and the second side surface 1012 is the side surface of the frame body 101 closest to the ground. The mounting frame 102 is mounted on the first side surface 1011 of the frame body 101, and the motor 401 and the reducer 402 are mounted on the mounting frame 102. A dust baffle 103 is disposed on the first side surface 1011 of the frame body 101, and the position of the dust baffle 103 corresponds to the position of the mounting frame 102, serving to shield the motor 401 and reducer 402 on the mounting frame 102 from dust. The vertical section of the first support column 104 is L-shaped. A first support column 104 is disposed at each of the two corners of the first side surface 1011 of the frame body 101 near the ground. The horizontal part 1041 of each first support column 104 is connected to the first side surface 1011 of the frame body 101, and the vertical part 1042 of each first support column 104 is fixed by anchor bolts. On the second side surface 1012 of the frame body 101, a second support column 105 is respectively provided at two corners away from the first support column 104. Each second support column 105 is fixed by anchor bolts, and the anchor bolts of each second support column 105 are on the same horizontal plane as the anchor bolts of each first support column 104. The arrangement of the first support column 104 and the second support column 105 provides support for the overall structure of the bouncing screen and provides space for the conveying system 500, so that the conveyor belt 501 is placed between the ground and the frame body 101, thereby facilitating the conveying of the screened material falling from the frame body 101 to the designated position. Furthermore, mounting plates 108 are provided on each first support column 104 and each second support column 105. The end faces of each mounting plate 108 near the ground are on the same horizontal plane, and each mounting plate 108 is provided with mounting holes. Anchor bolts are installed through the mounting holes, thereby achieving the installation of the first support columns 104 and the second support columns 105 on the same horizontal plane, ensuring that the bouncing screen is horizontally fixed on the ground. Furthermore, a connecting reinforcing rib 106 is provided between the mounting frame 102 and each first support column 104 to improve the strength of the mounting frame 102 and ensure the installation stability and firmness of the motor 401 and the reducer 402.

[0085] In addition, such as Figure 10As shown, the bouncing screen may also include two bases 318. The first fixed rod 305, the second fixed rod 306, and the two support rods 312 in each eccentric rotation system 300 are fixed on the two bases 318, so that the lengths of the first fixed rod 305, the second fixed rod 306, and the two support rods 312 are as small as possible, thereby improving the strength and stability of the overall structure of the eccentric rotation system 300.

[0086] Within one cycle of the screen plate's movement from its lowest point, the material leaves the screen plate when its vertical upward speed reaches its maximum, and falls back onto the screen plate just as it returns to its lowest point. This cycle represents the highest screening efficiency. However, in actual screening processes, materials not only influence each other but also must overcome air resistance, making it difficult to maintain peak screening efficiency consistently. Therefore, an average value is used instead. In the embodiments of this application, such as... Figure 3 , Figure 9 and Figure 10 As shown, the eccentric wheel 301 rotates at 140 r / min, ensuring that when the screen plate 201 is at its highest point in the first direction, the material is positioned higher than the screen plate 201. Furthermore, after passing the point of maximum speed of the screen plate 206, the material's acceleration is less than that of the screen plate 206, effectively improving screening efficiency. Additionally, the 180° phase difference between adjacent eccentric wheels 301 in the bouncing screen allows the screen plate 201 to alternately rise and disperse the material within the same cycle, resulting in even higher screening efficiency. Further, when the screen plate 201 is at its highest point in the first direction, such as... Figure 5 As shown, the angle between the sieve plate 201 and the ground is 9.3°. When the sieve plate 201 is at its lowest point in the first direction, as... Figure 6 As shown, the angle between the sieve plate 201 and the ground is 13°, which allows the tilt angle of the sieve plate 201 to be within the tilt range of 0°–15°, and ensures that the sieve plate 201 does not collide during its movement.

[0087] The above describes the various components of the bouncing screen with a variable screen plate inclination angle during operation, as provided in this embodiment, and their connection relationships. The following section will combine... Figure 1 – Figure 11 The complete structure and working principle of a bouncing screen with a variable tilt angle of the screen plate during operation are described in detail through a specific embodiment.

[0088] In this specific embodiment, the overall design of the rack 100 is as follows: Figure 1 and Figure 2 As shown, the frame 100 directly determines the size of the entire bouncing screen equipment, and its material can be stainless steel, carbon steel, cast iron, etc.

[0089] The sieve plate system 200 has a total area of ​​3000mm × 2220mm, consisting of three sieve plates 201 arranged side-by-side, each with an area of ​​3000mm × 740mm. Furthermore, the side baffles 202 have a serrated tooth root length of 40mm, matching the 3000mm length of the sieve plates 201, and are positioned at a moderate height above the first sieve plate end face 2011 in the first direction. Simultaneously, the cross-sectional shape of the plate baffles 203 is identical to the single tooth shape of the serrated structure. Seven plate baffles 203 are installed on the sieve plates 201. The sieve holes 206 are round holes with a diameter of 20mm. The overall design of the sieve plate 201 is as follows: Figure 7 As shown. Two sets of sieve holes 206 are respectively set on both sides of the screening area 2013. A connecting plate 302 and two connecting blocks 316 are provided on the second sieve plate end face 2012 of the sieve plate 201. The sieve plate 201 is connected to the eccentric rotation system 300 through the connecting plate 302 and the connecting blocks 316. Among them, the length of the first diagonal support rod 307 and the second diagonal support rod 308 in the eccentric rotation system 300 is 1500mm, the length of the top rod 310 is 300mm, the height of the eccentric wheel 301 shaft is 500mm, the position of the fixing block 303 is symmetrically spaced 2400mm with respect to the plane where the eccentric wheel 301 shaft is located, the height of the support rod 312 is 1000mm, the positional distance between the two connecting blocks 316 is 2400mm, and the length of the first connecting rod 317 and the second connecting rod 309 is 1000mm. Furthermore, when the sieve plate 201 is at its highest point in the first direction, the height difference between the left and right ends of the sieve plate 201 along the third direction is 676.37 mm. Figure 5 As shown, when the sieve plate 201 is tilted at an angle of 13° and is at its lowest point in the first direction, as... Figure 6 As shown, the height difference between the left and right ends of the screen plate 201 along the third direction is 485.31 mm. At this time, the tilt angle of the screen plate 201 is 9.3°. The tilt angle of the screen plate 201 is within the tilt range of the bouncing screen, and it can ensure that the screen plate 201 will not collide during its movement. The bouncing screen also uses a first partition 204 set at the front and rear of each eccentric rotation system 300 along the second direction, and a second partition 205 set between each eccentric rotation system 300 and the frame body 101 to prevent material from falling and affecting the operation of the mechanism. At the same time, a conveying system 500 is set below the screen plate system 200 and the eccentric rotation system 300 along the first direction, and the screened material is transported to the designated position for continuous operation via the conveyor belt 501.

[0090] In this specific embodiment, the drive system 400 drives the eccentric wheels 301 of the eccentric rotation system 300 to rotate. The motor 401 is connected to the eccentric wheels 301 of each eccentric rotation system 300 via a transmission shaft. The motor 401 provides the speed and torque through the reducer 402 to drive the transmission shaft to rotate. The transmission shaft drives the eccentric wheels 301 to rotate, and the eccentric wheels 301 transmit motion to the screen plate 201 through a structure connected to the screen plate 201. Furthermore, a support seat can be provided in the bouncing screen to support the transmission shaft and prevent the magnitude and direction of the force on the transmission shaft from changing during rotation, thus avoiding fatigue failure.

[0091] In summary, the bouncy screen with a variable tilt angle of the screen plate can achieve compound motion of the screen body in the up, down, left, and right directions during the working process, thereby realizing the screening of waste. Moreover, the bouncy screen only needs one motor to drive the screen plate to complete two movements in the up and down direction (i.e., the first direction) and the left and right direction (i.e., the third direction), and the stroke of the movement in both directions is adjustable.

[0092] The specific steps for using a bouncing screen with a variable screen plate in this work process are as follows:

[0093] 1. Household waste to be sorted is transported to the feed inlet by a belt pulley or other transport device and put into the bouncing screen, that is, it is put into the screen plate through the second opening end of the cavity structure.

[0094] 2. The motor drives the eccentric wheel to rotate, and the mating wheel between the push rod and the eccentric wheel rotates accordingly, which in turn drives the push rod, the first inclined support rod and the second inclined support rod to move, causing the screen plate to vibrate.

[0095] 3. The material on the sieve plate is subjected to vibration force and begins to vibrate.

[0096] 4. Finer particles pass through the sieve holes of the sieve plate and fall off, while coarser particles are blocked by the sieve plate and bounce back onto the material layer. Lighter materials have a greater displacement than heavier materials, so they will be differentiated when they fall onto the conveyor belt.

[0097] 5. The material passing through the sieve plate system is collected or discharged, completing the material screening process.

[0098] The specific adjustment method for the adjustable tilt angle of the sieve plate in this working process is as follows:

[0099] The screen plate moves up and down in the first direction using the motion principle of a cam push rod. The drive shaft rotates under the drive of the motor, which drives the eccentric wheel to rotate, thereby driving the push rod to move up and down. The second inclined support rod swings up and down with the slider as the fulcrum under the action of the push rod. The slider is hinged to the upper end of the second inclined support rod, so the slider also swings up and down. Since the slider is embedded in the first groove of the connecting plate and the connecting plate is fixed to the screen plate, the screen plate also moves up and down under the action of the slider.

[0100] The vertical movement amplitude of the screen plate is adjusted as follows: The vertical movement amplitude can be adjusted by changing the length of the push rod. When the push rod is shorter, the sliding block can move a smaller distance, the movement amplitude of the second diagonal support rod is smaller, the movement range of the sliding block is smaller, and consequently, the vertical movement amplitude of the screen plate is smaller. Conversely, when the push rod is longer, the sliding block can move a larger distance, the movement amplitude of the second diagonal support rod is larger, the movement range of the sliding block is larger, and consequently, the vertical movement amplitude of the screen plate is larger. Alternatively, the vertical movement amplitude of the screen plate can also be adjusted by changing the sliding block.

[0101] The left-right linear motion of the sieve plate along the third direction is accomplished by the combined action of the eccentric wheel, the moving rod, the first connecting rod, and the second connecting rod. The drive shaft rotates under the action of the motor, driving the eccentric wheel to rotate. The moving rod remains stationary in the first direction and reciprocates left and right under the support of the support wheel and the limit of the support rod. Since the sieve plate is connected to the first connecting rod and the second connecting rod through two connecting blocks respectively, the sieve plate also reciprocates left and right accordingly.

[0102] The left-right reciprocating motion amplitude of the sieve plate is adjusted by adjusting the eccentric wheel. The larger the eccentricity of the eccentric wheel, the greater the range of left-right reciprocating motion of the sieve plate; conversely, the smaller the eccentricity, the smaller the range of left-right reciprocating motion of the sieve plate.

[0103] It will be understood by those skilled in the art that the accompanying drawings are merely schematic diagrams of one embodiment, and the structures shown in the drawings are not necessarily essential for implementing this application. Furthermore, it should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0104] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, it should be noted in the description of this application that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component 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 application.

[0105] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope described in the claims.

Claims

1. A bouncing screen with a variable tilt angle of the screen plate during operation, characterized in that, include: A frame, wherein the frame is provided with a cavity structure with openings at both ends, the cavity structure including a first opening end and a second opening end, the first opening end being the opening end of the cavity structure close to the ground along a first direction, and the second opening end being the opening end of the cavity structure away from the ground along the first direction; A sieve plate system, wherein the sieve plate system is disposed within the cavity structure, the sieve plate system comprising: A sieve plate, wherein a plurality of sieve plates are provided in the cavity structure, and the sieve plates are disposed near the second opening end. The plurality of sieve plates are arranged sequentially along the second direction, and the sieve plates are disposed at an angle to the ground. The sieve plate includes a first sieve plate end face and a second sieve plate end face. The first sieve plate end face is the end face of the sieve plate away from the ground, and the second sieve plate end face is the end face of the sieve plate close to the ground. An eccentric rotation system is provided for each of the screen plates. The eccentric rotation system is disposed within the cavity structure and connected to the second end face of the screen plate, for driving the screen plate to reciprocate. The eccentric rotation system includes: An eccentric wheel is disposed within the cavity structure; A connecting plate is disposed on the second end face of the sieve plate. A first sliding groove is provided on the side surface of the connecting plate away from the sieve plate, and the first sliding groove extends along the long side of the sieve plate. A fixing block is fixedly disposed at the first end of the first groove; A slider, which is slidably disposed at the second end of the first groove; The first fixing rod is fixedly installed inside the cavity structure; The second fixing rod is fixedly installed inside the cavity structure. The first fixing rod and the second fixing rod are arranged sequentially along a third direction, and the height of the second fixing rod is less than the height of the first fixing rod. The first diagonal brace has one end rotatably connected to the first fixed rod and the other end rotatably connected to the fixed block. A second sliding groove is provided in the middle of the first diagonal brace. The second sliding groove extends along the long side of the first diagonal brace and penetrates the opposite two side surfaces of the first diagonal brace. The second diagonal brace has one end rotatably connected to the second fixed rod and the other end rotatably connected to the slider. A third sliding groove is provided in the middle of the second diagonal brace. The third sliding groove extends along the long side of the second diagonal brace and penetrates the opposite two sides of the second diagonal brace. A sliding shaft, wherein the first diagonal brace and the second diagonal brace are sequentially passed through the sliding shaft, and the sliding shaft is slidably disposed in the second sliding groove and the third sliding groove; A push rod, one end of which is connected to one end of the sliding shaft; The mating wheel is rotatably connected to the other end of the push rod, and the mating wheel abuts against the eccentric wheel. When the eccentric wheel rotates, the eccentric wheel drives the push rod to reciprocate along the first direction through the mating wheel. The cavity structure contains two support rods, which are arranged sequentially along the third direction and located on both sides of the eccentric wheel. Each support rod has a mounting groove at the end away from the ground in the first direction, and the mounting groove penetrates the opposite two sides of the support rod. Each of the mounting slots has a support wheel that is rotatably disposed therein. A movable rod has two mounting slots of the two support rods respectively passing through its two ends. A limiting groove is provided at the end of the movable rod near the first fixed rod, penetrating both opposite surfaces of the movable rod. A U-shaped groove is provided at the end of the movable rod near the second fixed rod, with the opening end of the U-shaped groove positioned along the third direction and facing outwards from the movable rod. In the first direction, two fourth sliding grooves are provided on the surface of the movable rod near the ground. The positions of the two fourth sliding grooves correspond one-to-one with the positions of the two mounting slots. Each support wheel in the mounting slot slides within the fourth sliding groove. The moving rod is fixedly connected to two limiting rods, which extend along the first direction and are located on opposite sides of the eccentric wheel in the third direction, respectively abutting against the eccentric wheel. When the eccentric wheel rotates, the eccentric wheel drives the moving rod to reciprocate along the third direction through the two limiting rods. Connecting blocks: Two connecting blocks are provided on the second end face of the sieve plate, and the two connecting blocks are arranged sequentially along the long side of the sieve plate, and the two connecting blocks are respectively located on both sides of the connecting plate; The first connecting rod has one end slidably disposed in the limiting groove near the first fixed rod, and the other end of the first connecting rod is rotatably connected to the connecting block near the first fixed rod. A limiting shaft, the two ends of which are respectively rotatably disposed in the U-shaped groove, and the limiting shaft extends along the second direction; The second connecting rod has a fifth sliding groove that extends along the long side of the second connecting rod. The limiting shaft is slidably disposed in the fifth sliding groove. One end of the second connecting rod is rotatably connected to the connecting block near the second fixed rod. A drive system for driving each of the eccentric wheels to rotate, the drive system comprising: An electric motor, which is mounted on the frame; The motor is connected to the eccentric wheel of each of the eccentric rotation systems via the speed reducer, driving the eccentric wheel to rotate; A conveying system for conveying the material screened by the screen plate system, the conveying system comprising: In the first direction, two conveyor belts are arranged between the frame and the ground. The two conveyor belts are arranged sequentially along the third direction, and each conveyor belt extends along the second direction. The position of each conveyor belt corresponds to the position of the first opening end, and the projection of each sieve plate in the first direction is located on the two conveyor belts respectively. Wherein, the first direction, the second direction, and the third direction are mutually perpendicular, and the first direction is a direction perpendicular to the ground.

2. The bouncing screen with a variable inclination angle of the screen plate during operation as described in claim 1, characterized in that, The sieve plate system also includes: Side baffles: In the second direction, each of the first screen plate end faces of the screen plate is provided with a side baffle at the two opposite edges, the two side baffles are symmetrically arranged, and each side baffle has a sawtooth structure. The screen plate has N baffles evenly spaced on the first screen plate end face of each screen plate. The cross-sectional shape of the baffle is the same as the single tooth shape of the side baffle. The N baffles and the two side baffles divide the first screen plate end face of the screen plate into N-1 screening areas.

3. The bouncing screen with a variable inclination angle of the screen plate during operation as described in claim 2, characterized in that, Except for the screening areas at both ends of the sieve plate, each of the remaining screening areas is provided with two sets of sieve holes. Each set of sieve holes is located at both ends of the screening area along the second direction. The sieve holes penetrate the first end face and the second end face of the sieve plate. The projection of the eccentric rotation system corresponding to each sieve plate in the first direction is located between the projections of the two sets of sieve holes in each screening area of ​​the sieve plate in the first direction.

4. The bouncing screen with a variable inclination angle of the screen plate during operation as described in claim 3, characterized in that, The sieve plate system also includes: The first partition is provided on the second screen plate end face of each screen plate. The length of each first partition is the same as the length of the screen plate. The two first partitions are respectively provided on both sides of the eccentric rotation system in the second direction. The projection of each first partition in the first direction is located between the projection of the eccentric rotation system and the projection of the two sets of screen plates in the first direction. Each first partition is fixedly connected to the end face of the second screen plate by multiple bolts. A gasket is provided between the first partition and the screen plate. The second partition is provided on each of the two sides of the screen plate along the third direction. The second partition is connected to the screen plate by a pin, and each second partition is located between two first partitions. The width of the second partition is the same as the distance between the two first partitions.

5. The bouncing screen with a variable inclination angle of the screen plate during operation as described in claim 2, characterized in that, The single tooth of the side baffle is triangular in shape, and the three angles of the triangle are 75°, 60° and 45° respectively. The 45° angle faces the direction from the first link to the second link, and the 75° angle faces the direction from the second link to the first link.

6. The bouncing screen with a variable inclination angle of the screen plate during operation as described in claim 1, characterized in that, There is a 180° phase difference between two adjacent eccentric wheels.

7. The bouncing screen with a variable tilt angle of the screen plate during operation as described in claim 1, characterized in that, The rack includes: The frame body is a rectangular cylindrical structure with openings at both ends, and the cavity structure is disposed within the frame body; Mounting bracket, the mounting bracket is provided on the first side surface of the frame body, and the motor and the reducer are mounted on the mounting bracket; A dustproof baffle is disposed on the first side surface of the frame body, and the position of the dustproof baffle corresponds to the position of the mounting bracket. The first support column has an L-shaped vertical section. One first support column is provided at each of the two corners of the first side surface of the frame body near the ground. The horizontal part of each first support column is connected to the first side surface of the frame body, and the vertical part of each first support column is fixed by anchor bolts. The second support column is provided at two corners away from the first support column on the second side surface of the frame body. Each second support column is fixed by the anchor bolts, and the anchor bolts of each second support column are on the same horizontal plane as the anchor bolts of each first support column. Wherein, the first side surface of the rack body is one side surface of the rack body in the second direction, and the second side surface of the rack body is the side surface of the rack body closer to the ground.

8. The bouncing screen with a variable tilt angle of the screen plate during operation as described in claim 7, characterized in that, A connecting reinforcing rib is provided between the mounting frame and each of the first support columns.

9. The bouncing screen with a variable inclination angle of the screen plate during operation as described in claim 1, characterized in that, The rotational speed of the eccentric wheel is 140 r / min.

10. The bouncing screen with a variable inclination angle of the screen plate during operation, as described in claim 1, is characterized in that... When the sieve plate is at its highest point in the first direction, the angle between the sieve plate and the ground is 9.3°, and when the sieve plate is at its lowest point in the first direction, the angle between the sieve plate and the ground is 13°.

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