Mechanism sand production multistage vibrating screen device

Abstract

The utility model discloses a mechanism sand production multistage vibration screen divides device, including vibration screen body, the screen cloth is set up inside the inside of vibration screen body upper and lower position, to pass through the screen cloth will vibration screen body inside divide into three layer screening space, the one side position combination of vibration screen body is provided with three layer's push material dredging assembly. Advantageous effect lies in: the one side position combination of utility model's vibration screen body is provided with three layer's push material dredging assembly, and three layer's push material dredging assembly corresponds each layer screening space and respectively extends to corresponding screening space, by this with the mode that push rod of push material dredging assembly drives push material board to translate in screening space, can pass through push material board to push and scatter the screening material in screening space, avoids the situation that the screening material is blocked and is discharged from the pipe because of the accumulation gathering in the front end of screening space, is favorable to ensuring that the discharge pipe can smoothly discharge screening material.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary components for manufactured sand production, specifically to a multi-stage vibrating screen device for manufactured sand production. Background Technology

[0002] Manufactured sand refers to sand produced through a manufactured sand production system. The finished product is more regular and better meets daily needs compared to natural sand. Existing manufactured sand production systems generally include raw material supply devices, vibrating feeders, crushers, and vibrating screens. During use, the stone supplied by the raw material supply device is crushed by the crusher. The crushed fine stone is then screened by the vibrating screen to separate two types of stones: one is the stone that passes through the screen mesh, and the other is the residual stone that passes through the screen mesh. The former type of stone can be processed into sand by post-processing devices (such as air classifiers or sand washing machines), while the latter type of stone is returned for further crushing.

[0003] The fineness modulus of manufactured sand produced by current manufactured sand production systems is generally around 3.5, which is considered coarse sand. Moreover, the manufactured sand produced contains a large number of particles with a particle size range of 2.5mm to 5mm. After one screening by the vibrating screen, the crushed sand with a particle size range of 0.6mm to 0.15mm cannot be screened out. These fine sands are often used as fine aggregates in concrete, resulting in the manufactured sand produced by the manufactured sand production system failing to meet the needs of the application. At the same time, after a period of use, the screen of the vibrating screen usually experiences a decrease in screening efficiency due to temporary blockage of the filter holes, which often requires shutdown for maintenance, making it inconvenient to use. In addition, the discharge position of the vibrating screen is also prone to blockage due to material accumulation, which is also inconvenient to clear. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage vibrating screen device for producing manufactured sand in order to solve the above problems, as detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides a multi-stage vibrating screen for producing manufactured sand, including a vibrating screen body. The screening and sliding direction of the vibrating screen body is inclined downward from back to front along the longitudinal direction. The vibrating screen body is provided with a double-layer screen along its own screening and sliding direction. The screen is unfolded and arranged in the upper and lower positions inside the vibrating screen body to divide the interior of the vibrating screen body into three screening spaces through the screen.

[0007] The vibrating screen body has a three-layer pusher and unblocking assembly on one side. The three layers of pusher and unblocking assembly correspond to each screening space and extend into the corresponding screening space. The pusher and unblocking assembly is used to push and disperse the screening material in the screening space and sweep and clean the bottom of the screening space.

[0008] Each of the material pushing and unblocking components is equipped with an idle locking component at a position extending outside the vibrating screen body, which is used to temporarily fix the material pushing and unblocking component when it is idle.

[0009] Preferably, the vibrating screen body is an eccentric vibrating screener.

[0010] Preferably, the sieve aperture of the upper sieve ranges from 2.5 mm to 3.5 mm, and the sieve aperture of the lower sieve ranges from 0.2 mm to 0.6 mm.

[0011] Preferably, U-shaped side seats are fixed on both sides of the inside of the vibrating screen body at positions corresponding to the edge of the screen mesh, and the screen mesh is unfolded and installed by means of fixed connection with the U-shaped side seats.

[0012] Preferably, the front of the vibrating screen body is open and closed with a front sealing plate. The front of the front sealing plate is fixed with a discharge pipe extending from each screening space. The discharge pipes are all inclined forward and downward. At the same time, the lowest position of the rear end of each discharge pipe is level with the bottom position of the front end of the corresponding screening space. The three discharge pipes are staggered from each other in the width direction.

[0013] Preferably, each of the material pushing and unblocking components includes a material pushing plate and a push rod. The material pushing plate extends vertically along one side of each screening space, with its bottom surface parallel to the bottom surface of the corresponding screening space. The bottom surface of each material pushing plate is covered with a buffer edging of buffer material, which contacts the bottom surface of the corresponding screening space. An mounting wing plate extends from the inward-facing side of the material pushing plate, with its bottom surface parallel to the bottom of the corresponding screening space. Multiple flexible bristles are evenly distributed and densely fixed to the bottom surface of each mounting wing plate, with the bottom ends of the flexible bristles contacting the bottom of the corresponding screening space. The push rod is horizontally fixed to the outward-facing side of the material pushing plate. A mating hole is horizontally opened on the side of the vibrating screen body at the position corresponding to the push rod, and the push rod passes coaxially through the corresponding mating hole in a horizontal sliding engagement manner.

[0014] Preferably, the outer side of the pusher plate is horizontally fixed with guide rods at positions corresponding to the front and rear of the push rod, and the side of the vibrating screen body is horizontally provided with guide holes at positions corresponding to the front and rear of the mating hole, and the guide rods are all coaxially passed through the corresponding guide holes in a horizontal sliding fit.

[0015] Preferably, all the flexible bristles are rubber bristles and their bottom ends are bent and deformed to contact and press against the bottom surface of the corresponding screening space. The outer ends of the push rod and the guide rod corresponding to the same layer are flush and fixedly connected together by a connecting end plate. At the same time, the outer side of the connecting end plate is fixedly installed with a handle for easy gripping.

[0016] Preferably, each of the idle locking components includes a mating sleeve, a guide sleeve, and a clamping stud. The mating sleeve and the guide sleeve are coaxially fixed on the outer side of the vibrating screen body at positions corresponding to the mating hole and the guide hole, respectively. The push rods all pass through the corresponding mating sleeves in a transverse sliding engagement manner, and the guide rods all pass through the corresponding guide sleeves in a transverse sliding engagement manner. The upper outer periphery of each mating sleeve is provided with a mounting hole along the radial direction, and the mounting holes are all through holes. The clamping stud is coaxially inserted into each mounting hole in a threaded engagement manner.

[0017] Preferably, the bottom end of each clamping stud is coaxially fixed with an elastic pressure block whose outer diameter is smaller than that of the mounting hole, and the top end of each clamping stud is coaxially fixed with a handle for easy gripping.

[0018] In the above-mentioned multi-stage vibrating screen device for producing manufactured sand, in practical use, a three-layer pusher and unblocking assembly is assembled on one side of the vibrating screen body. These three layers correspond to each screening space and extend into their respective screening spaces. By using the push rods of the pusher and unblocking assembly to drive the pusher plate to move horizontally within the screening space, the pusher plate can push and disperse the screened material within the screening space, preventing the screened material from accumulating at the front of the screening space and blocking the discharge pipe. This ensures smooth discharge of the screened material. Furthermore, because the pusher plate of the pusher and unblocking assembly has mounting wing plates extending and fixed to its side, and these mounting wing plates are parallel to the bottom of the corresponding screening space, and each mounting wing plate has multiple flexible bristles evenly distributed and densely fixed downwards on its bottom surface, with the bottom ends of the flexible bristles contacting the bottom of the corresponding screening space, the pusher plate then drives the pusher plate to move horizontally within the screening space. The flexible brush bristles sweep across the top surface of the screen, cleaning and unblocking the screen holes. This helps maintain a high and stable screening efficiency for manufactured sand. Furthermore, since the push rod of the material pushing and unblocking assembly is equipped with an idle locking component at its extension point outside the vibrating screen body, when the material pushing and unblocking assembly is idle and the push plate is pulled to the side of the vibrating screen body, the elastic block is pressed against the push rod by tightening the clamping stud. This prevents the push rod from sliding axially along the mating hole, thus temporarily fixing the material pushing and unblocking assembly when idle and preventing it from interfering with the normal screening of manufactured sand by the vibrating screen body. At the same time, simply loosening the clamping stud allows the push rod to be pushed axially along the mating hole again for use. The idle fixing and unlocking methods of the material pushing and unblocking assembly are simple and easy to operate.

[0019] The beneficial effects are as follows: 1. The vibrating screen body of this utility model is equipped with a three-layer pusher and unblocking component on one side. The three-layer pusher and unblocking component corresponds to each screening space and extends into the corresponding screening space. By using the push rod of the pusher and unblocking component to drive the pusher plate to move horizontally in the screening space, the pusher plate can push and disperse the screening material in the screening space, avoiding the situation where the screening material is blocked by accumulating at the front end of the screening space, which helps to ensure that the screening material can be discharged smoothly from the discharge pipe.

[0020] 2. The pusher plate of the pusher assembly has an extended mounting wing plate fixed to its side. The mounting wing plates are all parallel to the bottom of the corresponding screening space. At the same time, multiple flexible bristles are evenly distributed and densely fixed on the bottom surface of the mounting wing plates. The bottom ends of the flexible bristles are in contact with the bottom of the corresponding screening space. Then, by pushing the flexible bristles with the pusher plate, the flexible bristles can sweep the top surface of the screen and clean and unblock the screen holes. This helps to maintain the screen's high and stable efficiency in screening manufactured sand.

[0021] 3. The push rod of the material pushing and unblocking assembly is equipped with an idle locking component at the position where it extends outside the vibrating screen body. When the material pushing and unblocking assembly is not in use and the push plate is pulled to the side of the vibrating screen body, the elastic pressure block is pressed against the outside of the push rod by tightening the clamping stud. This locks the push rod and prevents it from sliding axially along the mating hole, thus achieving temporary fixation of the material pushing and unblocking assembly when it is idle, preventing it from interfering with the normal screening of manufactured sand by the vibrating screen body. At the same time, the push rod can be pushed to move axially along the mating hole again to use the material pushing and unblocking assembly by simply loosening the clamping stud. The method of fixing and releasing the material pushing and unblocking assembly when idle is simple and easy to operate. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an overall isometric schematic diagram of this utility model;

[0024] Figure 2 This is a utility model Figure 1 Cross-section diagram Figure 1 ;

[0025] Figure 3 This is a utility model Figure 2 Enlarged view of a portion at point A;

[0026] Figure 4 This is a utility model Figure 1 Cross-section diagram Figure 2 ;

[0027] Figure 5 This is a utility model Figure 4 A magnified view of section B;

[0028] Figure 6 This is a utility model Figure 1 Front view diagram;

[0029] Figure 7 This is a utility model Figure 1 A left-view diagram;

[0030] Figure 8 This is a utility model Figure 1 A diagram showing the view from the right.

[0031] The annotations in the attached figures are explained as follows:

[0032] 1. Material pushing and unblocking assembly; 101. Material pushing plate; 102. Mounting wing plate; 103. Flexible bristles; 104. Handle; 105. Connecting end plate; 106. Push rod; 107. Guide rod; 108. Mating hole; 109. Buffer edging; 1010. Guide hole; 2. Vibrating screen body; 201. Front sealing plate; 202. Discharge pipe; 203. Screen; 204. U-shaped side seat; 3. Idle locking assembly; 301. Handle; 302. Clamping stud; 303. Mounting hole; 304. Mating sleeve; 305. Guide sleeve; 306. Elastic pressure block. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] See Figures 1-8As shown, this utility model provides a multi-stage vibrating screening device for manufactured sand production, including a vibrating screen body 2. The screening and sliding direction of the vibrating screen body 2 is inclined downward from back to front along the longitudinal direction. The vibrating screen body 2 is provided with a double-layer screen 203 along its own screening and sliding direction. The screen 203 is unfolded and arranged in the upper and lower positions inside the vibrating screen body 2, so as to divide the interior of the vibrating screen body 2 into three layers of screening space through the screen 203, thereby realizing multi-stage vibrating screening of manufactured sand. A three-layer material pushing and unblocking assembly 1 is assembled on one side of the vibrating screen body 2. The three layers of material pushing and unblocking assembly 1 correspond to each screening space and extend into the corresponding screening space. They are used to push and disperse the screening material in the screening space and sweep and clean the bottom of the screening space. Specifically, each material pushing and unblocking assembly 1 includes a pusher plate 101 and a pusher rod 106. A pusher plate 101 is vertically extended along one side of each screening space, and the bottom end face of the pusher plate 101 is parallel to the bottom surface of the corresponding screening space. The bottom surface of the pusher plate 101 is covered and fixed with a buffer edge 109 of buffer material, and the buffer edge 109 contacts the bottom surface of the corresponding screening space. An installation wing plate 102 is extended and fixed to the inward side end face of the pusher plate 101, and the bottom end face of the installation wing plate 102 is parallel to the bottom of the corresponding screening space. The bottom surface of the installation wing plate 102 is evenly distributed with... Multiple flexible bristles 103 are densely fixed, and the bottom ends of the flexible bristles 103 all contact the bottom of the corresponding screening space. Push rods 106 are horizontally fixed on the outward-facing side face of the push plate 101. The side of the vibrating screen body 2 is provided with mating holes 108 at the corresponding push rods 106. The push rods 106 are all coaxially inserted through the corresponding mating holes 108 in a horizontal sliding fit. The purpose of this arrangement is that, firstly, by using the push rods 106 of the push unblocking component 1 to drive the push plate 101 to move horizontally within the screening space, the push plate 101 can push and disperse the screening material in the screening space, avoiding the situation where the screening material accumulates at the front end of the screening space and blocks the discharge pipe 202. At the same time, by using the push plate 101 to drive the flexible bristles 103 to move, the flexible bristles 103 can sweep and clean the screen holes of the screen 203 by sweeping the top surface of the screen 203.

[0035] See Figures 1-8As shown, each of the material pushing and unblocking components 1 is equipped with an idle locking component 3 at a position extending outside the vibrating screen body 2. This idle locking component 3 is used to temporarily fix the material pushing and unblocking component 1 when it is not in use. Specifically, each idle locking component 3 includes a mating sleeve 304, a guide sleeve 305, and a clamping stud 302. The mating sleeve 304 and guide sleeve 305 are coaxially fixed to the outer surface of the vibrating screen body 2 at positions corresponding to the mating hole 108 and guide hole 1010, respectively. Push rods 106 all pass through the corresponding mating sleeve 304 coaxially in a lateral sliding engagement manner, and guide rods 107 all pass through the corresponding guide sleeve 305 coaxially in a lateral sliding engagement manner. The upper outer periphery of each mating sleeve 304 has a radially arranged mounting hole 30. 3. All mounting holes 303 are through holes, and each mounting hole 303 is coaxially fitted with a clamping stud 302 by threaded connection. The purpose of this setting is that when the material pushing and unblocking component 1 is not in use and the material pushing plate 101 is pulled to the side of the vibrating screen body 2, the elastic pressure block 306 is pressed against the outside of the push rod 106 by tightening the clamping stud 302. This can lock the push rod 106 and prevent it from sliding axially along the mating hole 108, thereby achieving temporary fixation of the material pushing and unblocking component 1 when it is not in use. At the same time, it is only necessary to loosen the clamping stud 302 to push the push rod 106 to move axially along the mating hole 108 again to use the material pushing and unblocking component 1. The method of fixing and releasing the material pushing and unblocking component 1 when it is not in use is simple and easy to operate.

[0036] See Figures 1-5As shown, the following optimizations have been made to this application. Specifically, the vibrating screen body 2 is an eccentric vibrating screener, so that the vibrating screen body 2 can achieve good and stable grading and screening effect for refractory raw material particles. Optionally, the screen aperture range of the upper screen 203 is 2.5mm to 3.5mm, and the screen aperture range of the lower screen 203 is 0.2mm to 0.6mm. This setting ensures that the upper and lower screens 203 have suitable screen apertures, thereby ensuring that the produced manufactured sand can be screened into coarse manufactured sand with a larger particle size suitable for construction and fine manufactured sand with a smaller particle size suitable for use as fine aggregate in concrete. The crushed stone discharged through the corresponding discharge pipe 202 of the upper layer should be returned to the external crusher for re-crushing. Optionally, U-shaped side seats 204 are fixed on both sides of the vibrating screen body 2 at the edge of the reference screen 203, and the screen 203 is unfolded and installed by being fixedly connected to the U-shaped side seats 204, so as to realize the unfolding and fixing of the screen 203 with the help of the U-shaped side seats 204. The front of the vibrating screen body 2 is open and closed with a front sealing plate 201. The front of the front sealing plate 201 is fixed with a discharge pipe 202 extending from each screening space, and the discharge pipes 202 are all inclined forward and downward. At the same time, the lowest position of the rear end of each discharge pipe 202 is level with the bottom position of the front end of the corresponding screening space. The three discharge pipes 202 are staggered with each other in the width direction, so as to realize the separation and discharge of screening materials by means of the staggered discharge of the three discharge pipes 202, thus avoiding confusion.

[0037] See Figures 1-8As shown, guide rods 107 are horizontally fixed on the outer side of the pusher plate 101 at positions before and after the corresponding push rods 106. Guide holes 1010 are horizontally opened on the side of the vibrating screen body 2 at positions before and after the corresponding mating holes 108. The guide rods 107 are all coaxially inserted through the corresponding guide holes 1010 in a horizontal sliding fit. This arrangement facilitates stable guidance and correction of the movement of the pusher plate 101 by sliding the guide rods 107 coaxially along the guide holes 1010, thus avoiding misalignment of the pusher plate 101 as it rotates with the guide rods 107. The flexible bristles 103 are all rubber bristles, and their bottom ends are bent and deformed to contact and press against the bottom surface of the corresponding screening space. The outer ends of the push rods 106 and guide rods 107 in the same layer are flat and are fixedly connected together by the connecting end plate 105. At the same time, the outer side of the connecting end plate 105 is fixedly installed with handles 104 for easy gripping. The reason for this arrangement is that it is convenient to connect the push rods 106 and guide rods 107 into a whole for synchronous pushing by means of the connecting end plate 105, and it is convenient to push or pull the push rods 106 and push plates 101 by applying force by holding the handles 104. Alternatively, the bottom end of each clamping stud 302 is coaxially fixed with an elastic pressure block 306 whose outer diameter is smaller than that of the mounting hole 303, and the top end of each clamping stud 302 is coaxially fixed with a handle 301 for easy gripping. The consideration for this design is that, firstly, it is convenient to achieve a stable lock on the push rod 106 and prevent damage to the surface of the push rod 106 by deforming and pressing the elastic pressure block 306 against the outside of the push rod 106, and secondly, it is convenient to tighten the clamping stud 302 by applying force by holding the handle 301.

[0038] With the above structure, in practical use, a three-layer pusher and unblocking assembly 1 is assembled on one side of the vibrating screen body 2. The three layers of pusher and unblocking assembly 1 correspond to each screening space and extend into the corresponding screening space. In this way, the pusher 106 of the pusher and unblocking assembly 1 drives the pusher plate 101 to move horizontally within the screening space. The pusher plate 101 can push and disperse the screening material in the screening space, avoiding the situation where the screening material accumulates at the front end of the screening space and blocks the discharge pipe 202. This helps to ensure that the discharge pipe 202 can smoothly discharge the screening material. Since the pusher plate 101 of the pusher and unblocking assembly 1 has a mounting wing plate 102 fixed to its side, the mounting wing plate 102 is parallel to the bottom of the corresponding screening space. At the same time, multiple flexible bristles 103 are evenly distributed and densely fixed on the bottom surface of the mounting wing plate 102, and the bottom ends of the flexible bristles 103 are in contact with the bottom of the corresponding screening space. Then, the pusher plate 101 drives the flexible bristles 103 to move horizontally within the screening space. The 3-push-movement mechanism uses flexible bristles 103 to sweep and clean the screen holes of the screen 203 by sweeping the top surface of the screen 203. This helps maintain the screen 203's high and stable screening efficiency for manufactured sand. Furthermore, since the push rod 106 of the pushing and unblocking assembly 1 is equipped with idle locking components 3 at its extension points outside the vibrating screen body 2, when the pushing and unblocking assembly 1 is idle and the push plate 101 is pulled to the side of the vibrating screen body 2, the locking stud 3 can be tightened. The method of pressing the elastic block 306 against the outside of the push rod 106 can lock the push rod 106 from sliding axially along the mating hole 108, thereby achieving temporary fixation of the push material unblocking component 1 when it is idle, avoiding interference with the normal screening of manufactured sand by the vibrating screen body 2. At the same time, the push rod 106 can be pushed again to move axially along the mating hole 108 after loosening the clamping stud 302 to use the push material unblocking component 1. The method of fixing and releasing the push material unblocking component 1 when it is idle is simple and easy to operate.

[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multi-stage vibrating screen device for producing manufactured sand, comprising a vibrating screen body (2), characterized in that: The screening and sliding direction of the vibrating screen body (2) is inclined downward from back to front along the longitudinal direction. The vibrating screen body (2) is provided with a double-layer screen (203) along its own screening and sliding direction. The screen (203) is unfolded and set in the upper and lower positions inside the vibrating screen body (2) to divide the interior of the vibrating screen body (2) into three screening spaces through the screen (203). The vibrating screen body (2) is provided with a three-layer pusher and unblocking assembly (1) on one side. The three-layer pusher and unblocking assembly (1) corresponds to each screening space and extends into the corresponding screening space. It is used to push and disperse the screening material in the screening space and sweep and clean the bottom of the screening space by means of the pusher and unblocking assembly (1). The material pushing and unblocking component (1) is equipped with an idle locking component (3) at a position extending outside the vibrating screen body (2) to temporarily fix the material pushing and unblocking component (1) when it is idle.

2. The multi-stage vibrating screen device for producing manufactured sand according to claim 1, characterized in that: The vibrating screen body (2) is an eccentric vibrating screener.

3. The multi-stage vibrating screen device for producing manufactured sand according to claim 2, characterized in that: The sieve mesh (203) of the upper layer has a mesh size ranging from 2.5 mm to 3.5 mm, and the sieve mesh (203) of the lower layer has a mesh size ranging from 0.2 mm to 0.6 mm.

4. The multi-stage vibrating screen device for producing manufactured sand according to claim 3, characterized in that: The vibrating screen body (2) has U-shaped side seats (204) fixed on both sides inside at the position corresponding to the edge of the screen (203), and the screen (203) is unfolded and installed by being fixedly connected to the U-shaped side seats (204).

5. The multi-stage vibrating screen device for producing manufactured sand according to claim 4, characterized in that: The front of the vibrating screen body (2) is open and closed, with a front sealing plate (201) installed. The front of the front sealing plate (201) is fixed with a discharge pipe (202) extending from each screening space. The discharge pipes (202) are all inclined forward and downward. At the same time, the lowest position of the rear end of each discharge pipe (202) is level with the bottom position of the front end of the corresponding screening space. The three discharge pipes (202) are staggered from each other in the width direction.

6. A multi-stage vibrating screen for producing manufactured sand according to any one of claims 2-5, characterized in that: Each of the material pushing and unblocking components (1) includes a material pushing plate (101) and a push rod (106). The material pushing plate (101) is vertically extended along one side of each screening space, and the bottom surface of the material pushing plate (101) is parallel to the bottom surface of the corresponding screening space. The bottom surface of the material pushing plate (101) is covered and fixed with a buffer edge (109) of buffer material, and the buffer edge (109) contacts the bottom surface of the corresponding screening space. The inward-facing side surface of the material pushing plate (101) is fixed with a mounting wing plate (102), and the mounting wing plate (102) is... The bottom surfaces of the screens are all parallel to the bottom of the corresponding screening space. The bottom surfaces of the mounting wing plates (102) are all densely covered with multiple flexible bristles (103), and the bottom ends of the flexible bristles (103) are all in contact with the bottom of the corresponding screening space. The pusher plate (101) has the push rod (106) horizontally fixed on its outward-facing side surface. The vibrating screen body (2) has a mating hole (108) horizontally opened on its side at the position corresponding to the push rod (106), and the push rod (106) is coaxially inserted through the corresponding mating hole (108) in a horizontal sliding fit.

7. The multi-stage vibrating screen device for producing manufactured sand according to claim 6, characterized in that: The outer side of the pusher plate (101) is horizontally fixed with guide rods (107) at positions corresponding to the push rod (106) in front and behind. The side of the vibrating screen body (2) is horizontally provided with guide holes (1010) at positions corresponding to the mating hole (108) in front and behind. The guide rods (107) are all coaxially passed through the corresponding guide holes (1010) in a horizontal sliding fit.

8. The multi-stage vibrating screen device for producing manufactured sand according to claim 7, characterized in that: The flexible bristles (103) are all rubber bristles and their bottom ends are bent and deformed to contact and press against the bottom surface of the corresponding screening space. The outer ends of the push rod (106) and the guide rod (107) in the same layer are flat and are fixedly connected together by the connecting end plate (105). At the same time, the outer side of the connecting end plate (105) is fixedly installed with a handle (104) for easy gripping.

9. A multi-stage vibrating screen for producing manufactured sand according to claim 7 or 8, characterized in that: Each of the idle locking components (3) includes a mating sleeve (304), a guide sleeve (305), and a clamping stud (302). The outer side of the vibrating screen body (2) is coaxially fixed with the mating sleeve (304) and the guide sleeve (305) at the positions corresponding to the mating hole (108) and the guide hole (1010), respectively. The push rod (106) passes through the corresponding mating sleeve (304) in a transverse sliding fit, and the guide rod (107) passes through the corresponding guide sleeve (305) in a transverse sliding fit. The upper part of the outer periphery of the mating sleeve (304) is provided with a mounting hole (303) along the radial direction. The mounting holes (303) are all through holes. The clamping stud (302) is coaxially inserted into the mounting holes (303) in a threaded fit.

10. The multi-stage vibrating screen device for producing manufactured sand according to claim 9, characterized in that: The bottom end of each clamping stud (302) is coaxially fixed with an elastic pressure block (306) whose outer diameter is smaller than that of the mounting hole (303), and the top end of each clamping stud (302) is coaxially fixed with a handle (301) for easy gripping.

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