A combined cleaning screen

Abstract

The utility model discloses a combined cleaning sieve, including box body and sieve, the inside parallel installation of box body has two slide rods, and the top of two slide rods is provided with sieve, in the utility model, through first motor drive main shaft rotation, main shaft helps transmission belt synchronous drive two auxiliary shafts rotation, makes main shaft and auxiliary shaft bottom's stirring impeller simultaneously rotates on the screen of sieve, carries out stirring, and turns over to the grain, makes the upper layer and lower layer grain constantly exchanges position, lets all grain can receive screening effect evenly, avoided the screening lag that grain accumulation caused, simultaneously, second motor drives disc cam rotation, and disc cam and sieve left side wall's concave resistance block interact, and cooperate the spring's elastic reset force on sieve right side wall guide rod, makes sieve through slide sleeve on two slide rods reciprocating sliding, and sieve's reciprocating sliding has increased the relative motion frequency of grain and screen, and the speed of small particle sundries through screen has been accelerated.

Description

Technical Field

[0001] This utility model relates to the field of cleaning screen technology, and in particular to a combined cleaning screen. Background Technology

[0002] Currently, during the production and processing of grains, it is necessary to screen the grains to remove fine particulate impurities through screening devices.

[0003] In the prior art, when screening grains using a screening device, the grains are poured into the screening device. During the screening process, the upper layer of grains is subjected to greater screening intensity, and the fine particles and impurities contained in the upper layer of grains slowly settle downwards, thereby reducing the screening speed of the grains.

[0004] To address this issue, a combined cleaning screen is proposed, which possesses the advantages of combined screening for impurity removal and improved screening rate, thereby solving the problems mentioned in the background technology. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a combined cleaning screen.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a combined cleaning screen, comprising a housing and a screen bucket. Two sliding rods are installed parallel to each other inside the housing, and a screen bucket is positioned above the two sliding rods. A screen mesh is fixed to the bottom surface of the screen bucket by screws, and a sliding sleeve that engages with the sliding rods is provided at the edge of the bottom surface of the screen bucket. A bracket is welded to the top surface of the housing, and a first motor is fixedly installed on the top of the bracket. The output end of the first motor is fixed to a main shaft via a coupling. Symmetrical mountings are placed on the inner side of the bracket about the main shaft. The device is equipped with two auxiliary shafts, and the upper surfaces of the two auxiliary shafts are respectively provided with transmission belts that are wound and connected to the main shaft. The bottom of the main shaft and the two auxiliary shafts are fixed with stirring impellers, and the stirring impellers extend above the screen of the sieve hopper. The left side wall of the sieve hopper is welded with a concave abutment block, and the right side wall of the sieve hopper is welded with several guide rods that are inserted and connected to the box body. The surface of the guide rods of the sieve hopper is fitted with springs that abut against the inner wall of the box body. The inner wall of the box body is fixed with a second motor, and the output end of the second motor is fixed with a disc-shaped cam connected to the concave abutment block.

[0007] As a further description of the above technical solution: a discharge nozzle is installed obliquely on the lower side of the screen hopper, and a vertical insert plate is installed at the connection between the discharge nozzle and the screen hopper. One end of the discharge nozzle extends to the outside of the box body, and a rectangular clearance opening is opened on the upper surface of the box body corresponding to the discharge nozzle.

[0008] As a further description of the above technical solution: a ramp is welded to the bottom of the inner side of the box, and a waste discharge port is opened on the lower surface of the box corresponding to the lowest point of the ramp.

[0009] As a further description of the above technical solution: the bottom of the sieve bucket is provided with a mounting opening, and the inner size of the mounting opening matches the size of the sieve mesh. A rectangular guide frame is welded to the bottom of the sieve bucket corresponding to the mounting opening, and the rectangular guide frame is offset from the sliding sleeve.

[0010] As a further description of the above technical solution: multiple guide rods are provided, and the multiple guide rods are arranged in parallel, and each guide rod has a limiting disk at one end extending out of the box.

[0011] As a further description of the above technical solution: the cross-section of the support is L-shaped, and triangular reinforcing blocks are welded to the inner side of the corner of the support, and the support is located directly above the screen hopper.

[0012] As a further description of the above technical solution: the top of the auxiliary shaft is rotatably connected to it via a bearing, and the stirring impellers of the main shaft and the auxiliary shaft are installed at the same height.

[0013] This utility model has the following beneficial effects: In this invention, a first motor drives the main shaft to rotate, which in turn drives two auxiliary shafts to rotate synchronously via a transmission belt. This causes the stirring impellers at the bottom of both the main and auxiliary shafts to rotate simultaneously above the screen in the sieve hopper, stirring and agitating the grain. This continuous exchange of positions between the upper and lower layers of grain ensures that all grain is evenly screened, preventing screening delays caused by grain accumulation. Simultaneously, a second motor drives a disc-shaped cam to rotate. The cam interacts with a concave abutment on the left side wall of the sieve hopper, and combined with the elastic restoring force of a spring on the guide rod on the right side wall, the sieve hopper slides back and forth on two sliding rods via a sliding sleeve. This reciprocating sliding increases the relative motion frequency between the grain and the screen, accelerating the passage of fine particles through the screen. This combined design of stirring and agitation with reciprocating sliding screening creates a synergistic impurity removal effect. Compared to a single screening method, this approach more comprehensively and thoroughly removes impurities from the grain, significantly shortening screening time and effectively increasing the screening rate. Attached Figure Description

[0014] Figure 1 This is a top view of the combined cleaning screen of this utility model; Figure 2 This is a schematic diagram of the internal structure of a combined cleaning screen according to the present invention; Figure 3 This is a schematic diagram of the structure of the screen bucket and the support frame; Figure 4 This is a 3D view of the sieve bucket.

[0015] Legend: 1. Housing; 2. Screen hopper; 3. Support frame; 4. First motor; 5. Screen; 6. Second motor; 7. Disc cam; 8. Concave stop block; 9. Guide rod; 10. Spring; 11. Discharge nozzle; 12. Vertical insert plate; 13. Slide rod; 14. Main shaft; 15. Auxiliary shaft; 16. Drive belt; 17. Sliding sleeve; 18. Inclined platform; 19. Waste discharge port; 20. Agitator impeller. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] According to an embodiment of the present invention, a combined cleaning screen is provided.

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4As shown, a combined cleaning screen according to an embodiment of the present invention includes a housing 1 and a screen hopper 2. Two sliding rods 13 are installed parallel to each other inside the housing 1, and the screen hopper 2 is positioned above the two sliding rods 13. A screen mesh 5 is fixed to the bottom surface of the screen hopper 2 by screws, and a sliding sleeve 17 that engages with the sliding rods 13 is provided at the edge of the bottom surface of the screen hopper 2. A bracket 3 is welded to the top surface of the housing 1, and a first motor 4 is fixedly installed on the top of the bracket 3. A main shaft 14 is fixed to the output end of the first motor 4 via a coupling. Two auxiliary shafts 15 are symmetrically installed on the inner side of the bracket 3 about the main shaft 14, and transmission belts 16 that are wound and connected to the main shaft 14 are respectively provided on the upper surface of the two auxiliary shafts 15. The main shaft 14 and the two auxiliary shafts... A stirring impeller 20 is fixed to the bottom of each of the 15 sieve hoppers, extending above the screen 5 of the sieve hopper 2. A concave abutment block 8 is welded to the left side wall of the sieve hopper 2, and several guide rods 9, which are inserted and connected to the housing 1, are welded to the right side wall of the sieve hopper 2. A spring 10 is fitted on the surface of the guide rods 9 of the sieve hopper 2, abutting against the inner wall of the housing 1. A second motor 6 is fixed to the inner wall of the housing 1, and a disc-shaped cam 7 connected to the concave abutment block 8 is fixed to the output end of the second motor 6. Two parallel sliding rods 13 inside the housing 1 provide a stable sliding support base for the sieve hopper 2. The two sliding rods 13 are horizontal and the spacing is adapted to the width of the sieve hopper 2, ensuring that the sieve hopper 2 will not deviate or shake during sliding. The bottom surface of the sieve hopper 2, located above the two sliding rods 13, is fixed with a screen 5 by screws. This detachable fixing method facilitates subsequent cleaning and replacement of the screen 5, and allows for flexible selection of appropriate screens 5 according to the particle size of different grains, enhancing the versatility of the equipment. A sliding sleeve 17 is provided at the bottom edge of the sieve hopper 2 and engages with the sliding rod 13. The inner wall of the sliding sleeve 17 is smoothed to reduce frictional resistance between it and the sliding rod 13, making the sliding of the sieve hopper 2 on the sliding rod 13 smoother and providing a stable motion foundation for efficient screening. The bracket 3 welded to the top of the housing 1 is made of high-strength steel and has sufficient load-bearing capacity. The first motor 4 is fixedly installed on its top with bolts to ensure that it will not loosen during high-speed operation. The main shaft 14, which is fixed to the output end of the first motor 4 through a coupling, is precisely coaxially connected with the motor output shaft to reduce energy loss during transmission. Two auxiliary shafts 15 are symmetrically installed on the inner side of the bracket 3 about the main shaft 14 and are symmetrically distributed on both sides of the main shaft 14. The transmission belts 16 provided on the upper surface of the two auxiliary shafts 15 are wound and connected to the main shaft 14 to form a synchronous transmission structure. Multi-axis synchronous rotation can be achieved by a single motor drive, simplifying the drive structure while ensuring the uniformity of screening. The stirring impeller 20, which is fixed at the bottom of the main shaft 14 and the two auxiliary shafts 15, extends above the screen 5 of the sieve hopper 2. The impeller blades are designed with an arc shape, which can generate a gentle and sufficient tumbling effect on the grain during rotation.The concave abutment block 8 welded to the left side wall of the sieve bucket 2 cooperates with the disc cam 7 fixed to the output end of the second motor 6 to provide driving force for the reciprocating motion of the sieve bucket 2; several guide rods 9 welded to the right side wall of the sieve bucket 2 and interpenetratingly connected to the housing 1 are arranged in parallel. One end of the spring 10 sleeved on the surface of the guide rod 9 abuts against the inner wall of the housing 1 and the other end abuts against the side wall of the sieve bucket 2, forming an elastic reset structure to ensure that the sieve bucket 2 can stably achieve reciprocating sliding under the action of the disc cam 7. For the first motor 4 and the second motor 6, the control method of this utility model is to control them by manually starting and stopping the switch. The wiring diagram of the power components and the power supply are common knowledge in the field. Moreover, this utility model is mainly used to protect mechanical devices, so the control method and wiring arrangement will not be explained in detail in this utility model. Please refer to Figure 1 and Figure 2 A discharge nozzle 11 is installed at an angle on the lower side of the sieve hopper 2, and a vertical insert plate 12 is inserted at the connection between the discharge nozzle 11 and the sieve hopper 2. One end of the discharge nozzle 11 extends to the outside of the housing 1. A rectangular clearance opening is provided on the upper surface of the housing 1 corresponding to the discharge nozzle 11. The connection between the discharge nozzle 11 and the sieve hopper 2 adopts a seamless welding process to ensure that there is no leakage of grain during the discharge process. The tilt angle of the discharge nozzle 11 is optimized (usually set to 30°-45°) to accelerate the discharge of grain by means of gravity and prevent the grain from accumulating in the discharge nozzle 11. The vertical plate 12 installed at the connection between the discharge nozzle 11 and the screen hopper 2 has a flat surface and fits tightly against the inner wall of the connection port. The opening and closing of the discharge channel can be flexibly controlled by inserting and removing the vertical plate 12, which facilitates the temporary closure of the discharge port during the screening process and ensures the continuity of the screening operation. One end of the discharge nozzle 11 extends to the outside of the box 1. The length of the extension is suitable for the external receiving and collecting device. The rectangular clearance opening on the upper surface of the box 1 corresponds to the discharge nozzle 11. Its size is slightly larger than the cross-section of the discharge nozzle 11, providing sufficient space for the discharge nozzle 11 to move synchronously with the screen hopper 2 and avoiding structural interference during the movement.

[0019] Please refer to Figure 2 The bottom inner side of the box 1 is welded with a ramp 18, and a waste discharge port 19 is opened on the lower surface of the box 1 at the lowest point of the ramp 18. The ramp 18 has a smooth transition design, and the slope angle is set according to the physical characteristics of fine particulate matter (generally 15°-25°), which can guide the fine particulate matter falling through the screen 5 to slide quickly along the ramp, effectively preventing the matter from accumulating at the bottom of the box 1. The waste discharge port 19 opened on the lower surface of the box 1 at the lowest point of the ramp 18 has no obvious protrusion at the connection with the ramp 18, ensuring that the matter can be discharged smoothly. The waste discharge port 19 can receive collection bags or conveying pipes externally to realize centralized treatment of fine particulate matter and maintain the cleanliness of the screening environment.

[0020] Please refer to Figure 1 and Figure 3 The bottom of the sieve hopper 2 has a mounting opening, the inner dimensions of which match the size of the screen 5. A rectangular guide frame is welded to the bottom of the sieve hopper 2 corresponding to the mounting opening, and the rectangular guide frame is offset from the sliding sleeve 17. The mounting opening at the bottom of the sieve hopper 2 has an inner dimension that matches the size of the screen 5, forming a precise fitting structure to prevent the screen 5 from shifting during the screening process. The rectangular guide frame welded to the bottom of the sieve hopper 2 corresponding to the mounting opening plays an auxiliary positioning and reinforcement role for the screen 5. The height of the guide frame is slightly lower than the thickness of the screen 5, which ensures the stability of the screen 5 after installation without affecting the normal screening and falling of the grain. The offset arrangement of the rectangular guide frame and the sliding sleeve 17 avoids structural interference between the two, ensuring that the sliding function of the sieve hopper 2 and the screening function of the screen 5 do not affect each other and can each play its role efficiently.

[0021] Please refer to Figure 4 Multiple guide rods 9 are provided, arranged in parallel. Each guide rod 9 has a limiting disc at one end extending out of the housing 1. The parallel arrangement and uniform spacing of the guide rods 9 form a stable guiding structure that effectively constrains the movement trajectory of the screen hopper 2, preventing it from tilting or deviating during reciprocating sliding. The limiting disc at the end of each guide rod 9 extending out of the housing 1 has a diameter larger than the cross-sectional diameter of the guide rod 9, effectively limiting the sliding stroke of the guide rod 9 and preventing it from falling out of the housing 1, thus ensuring the safety and stability of the equipment operation.

[0022] Please refer to Figure 2 and Figure 3 The support 3 has an L-shaped cross-section, and triangular reinforcing blocks are welded to the inner side of the corners. The support 3 is located directly above the sieve hopper 2. This structural design provides stable installation support for the first motor 4, main shaft 14, and auxiliary shaft 15, while reducing the space occupied above the sieve hopper 2, facilitating grain input and observation of the screening process. The triangular reinforcing blocks welded to the inner side of the corners of the support 3 utilize the stability principle of triangles to significantly improve the structural strength at the corners, effectively resisting the vibration and impact forces generated by motor operation and component movement during screening. The support 3's location directly above the sieve hopper 2 ensures that the stirring impellers 20 at the bottom of the main shaft 14 and auxiliary shaft 15 can accurately act on the grain inside the sieve hopper 2, ensuring that the stirring and tumbling action evenly covers the entire screening area of ​​the sieve hopper 2, improving screening uniformity.

[0023] Please refer to Figure 2 and Figure 3The top of the auxiliary shaft 15 is rotatably connected to the main shaft 14 and the auxiliary shaft 15 via a bearing. The stirring impellers 20 of the main shaft 14 and the auxiliary shaft 15 are installed at the same height. The bearings are high-precision rolling bearings, which have the characteristics of low friction coefficient and high rotational accuracy, reducing the resistance during the rotation of the auxiliary shaft 15 and ensuring the synchronous operation accuracy of the auxiliary shaft 15 and the main shaft 14. The fact that the stirring impellers 20 of the main shaft 14 and the auxiliary shaft 15 are installed at the same height means that all stirring impellers 20 can turn the grain on the same horizontal plane, avoiding the problem of insufficient turning intensity in some areas due to height differences. This ensures that the grain in different positions in the sieve hopper 2 receives uniform stirring, further improving the screening efficiency.

[0024] Working principle: In use, the grain to be screened is poured into the sieve hopper 2, and the first motor 4 and the second motor 6 are started. The first motor 4 drives the main shaft 14 to rotate through the coupling. The main shaft 14 drives the two auxiliary shafts 15 to rotate synchronously through the transmission belt 16. This causes the stirring impellers 20 at the bottom of the main shaft 14 and the auxiliary shafts 15 to rotate simultaneously above the screen 5 of the sieve hopper 2, stirring and turning the grain, breaking up the piled-up state of the grain, and allowing grain of different layers to fully contact the screen 5. Simultaneously, the second motor 6 drives the disc cam 7 to rotate. The disc cam 7 interacts with the concave abutment 8 on the left side wall of the sieve hopper 2, and with the elastic restoring force of the spring 10 on the guide rod 9 on the right side wall of the sieve hopper 2, the sieve hopper 2 slides back and forth on the two slide rods 13 through the sliding sleeve 17. Under the dual action of the reciprocating sliding of the sieve hopper 2 and the tumbling of the stirring impeller 20, the fine particles of impurities in the grain fall through the screen 5 onto the inclined platform 18 at the bottom of the inner side of the box 1, and slide along the slope of the inclined platform 18 to the waste discharge port 19 for discharge. The screened grain remains in the sieve hopper 2. When it needs to be discharged, the vertical insert plate 12 at the discharge nozzle 11 is pulled out, and the grain is discharged out of the box 1 through the discharge nozzle 11.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined cleaning screen, comprising a housing (1) and a screen hopper (2), characterized in that: Two sliding rods (13) are installed in parallel inside the housing (1), and a sieve hopper (2) is set above the two sliding rods (13). A screen (5) is fixed to the bottom surface of the sieve hopper (2) by screws, and a sliding sleeve (17) that fits into the sliding rod (13) is set at the edge of the bottom surface of the sieve hopper (2). A bracket (3) is welded to the top surface of the housing (1), and a first motor (4) is fixedly installed on the top of the bracket (3). The output end of the first motor (4) is fixed to the main shaft (14) by a coupling. Two auxiliary shafts (15) are symmetrically installed on the inner side of the bracket (3) about the main shaft (14), and the upper surface of the two auxiliary shafts (15) is respectively provided with a connection to the main shaft. (14) A transmission belt (16) is wound around the main shaft (14) and two auxiliary shafts (15) with stirring impellers (20) fixed at the bottom. The stirring impellers (20) extend to the screen (5) of the sieve bucket (2). A concave abutment (8) is welded to the left side wall of the sieve bucket (2). Several guide rods (9) that are inserted and connected to the box body (1) are welded to the right side wall of the sieve bucket (2). A spring (10) that abuts against the inner wall of the box body (1) is sleeved on the surface of the guide rods (9) of the sieve bucket (2). A second motor (6) is fixed to the inner wall of the box body (1). A disc cam (7) connected to the concave abutment (8) is fixed to the output end of the second motor (6).

2. The combined cleaning screen according to claim 1, characterized in that: The lower side of the sieve bucket (2) is inclinedly equipped with a discharge nozzle (11), and a vertical insert plate (12) is inserted at the connection between the discharge nozzle (11) and the sieve bucket (2). One end of the discharge nozzle (11) extends to the outside of the box body (1), and a rectangular clearance opening is provided on the upper surface of the box body (1) corresponding to the discharge nozzle (11).

3. The combined cleaning screen according to claim 1, characterized in that: The bottom of the inner side of the box (1) is welded with a ramp (18), and a waste outlet (19) is opened on the lower surface of the box (1) corresponding to the lowest point of the ramp (18).

4. The combined cleaning screen according to claim 1, characterized in that: The bottom of the sieve bucket (2) has an installation opening, and the inner size of the installation opening matches the size of the screen (5). A rectangular guide frame is welded to the bottom of the sieve bucket (2) corresponding to the installation opening, and the rectangular guide frame is misaligned with the sliding sleeve (17).

5. A combined cleaning screen according to claim 1, characterized in that: Multiple guide rods (9) are provided, and the multiple guide rods (9) are arranged in parallel, and each guide rod (9) is provided with a limiting disk at one end extending out of the box (1).

6. A combined cleaning screen according to claim 1, characterized in that: The cross-section of the support (3) is L-shaped, and a triangular reinforcing block is welded to the inner side of the corner of the support (3), and the support (3) is located directly above the screen hopper (2).

7. A combined cleaning screen according to claim 1, characterized in that: The top of the auxiliary shaft (15) is rotatably connected to the main shaft (14) and the auxiliary shaft (15) by a bearing, and the stirring impellers (20) of the main shaft (14) and the auxiliary shaft (15) are installed at the same height.

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