Cylinder precleaner with screen plate capable of being replaced quickly
The cylindrical primary cleaning screen with replaceable screen plates and adjustable tilt angle solves the problem of fixed screen cylinder parameters, realizes universal screening of different grain types, reduces equipment costs and management difficulty, and improves screening efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- COFCO ENG MAOSHENG EQUIP (HENAN) CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-21
AI Technical Summary
Existing cylindrical primary cleaning screens have fixed screen cylinder parameters that cannot be adjusted, resulting in a wide variety of specifications and poor versatility. Enterprises need to equip themselves with multiple specifications of equipment, which increases equipment and management costs.
A cylindrical primary cleaning screen with a quick-change screen plate and an adjustable screen cylinder inclination angle was designed. By changing the screen plate and adjusting the height of the support rollers, it can adapt to the screening needs of different types of grains and achieve flexible adjustment of the screen cylinder aperture and inclination angle.
It improves the versatility and screening efficiency of the cylindrical primary cleaning screen, reduces the production cost of enterprises, and expands the application range of the equipment.
Smart Images
Figure CN224142824U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of grain and granular material screening equipment, specifically relating to a cylindrical primary cleaning screen with a quickly replaceable screen plate used in grain screening and impurity removal. Background Technology
[0002] A cylindrical primary cleaning screen is a commonly used grain screening machine. It is generally suitable for the preliminary removal of impurities from grain materials before processing, such as corn, wheat, rice, and soybeans. It separates clean grains from impurities based on the density, thickness, and diameter of the material. The cylindrical primary cleaning screen is most effective at removing large impurities from grain materials, with high efficiency. After harvesting, the grain material enters the hopper of the cylindrical primary cleaning screen and automatically flows into the screen cylinder through a chute. During the rotation of the screen cylinder, the grain material is screened and impurities are removed. Particles smaller than the screen aperture pass through the screen holes and fall into the material outlet, while particles larger than the screen aperture remain inside the screen cylinder and eventually flow out from the impurity outlet, thus achieving the removal of large impurities from the grain material.
[0003] However, different types of grains have different particle sizes, and the flowability of grain materials is positively correlated with the particle size. The larger the grain particles, the better the flowability. Therefore, when designing and manufacturing existing cylindrical primary cleaning screens, parameters such as the screen cylinder aperture and the tilt angle of the screen cylinder need to be configured according to the type of grain being screened. Once the parameters are set, they cannot be adjusted. As a result, existing cylindrical primary cleaning screens have many specifications and poor versatility. Grain processing enterprises need to be equipped with multiple specifications of cylindrical primary cleaning screens, resulting in high equipment and management costs for grain processing enterprises. Utility Model Content
[0004] In summary, in order to overcome the shortcomings of the existing technology, this utility model provides a cylindrical primary cleaning screen with a quickly replaceable screen plate. The tilt angle of the screen cylinder is adjustable, and the cylindrical screen can be quickly replaced, so that the cylindrical primary cleaning screen can be used for the preliminary cleaning of different types of grains, effectively improving the versatility of the cylindrical primary cleaning screen.
[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is implemented as follows:
[0006] A cylindrical primary cleaning screen with a quick-change screen plate, comprising: a rotatable screen cylinder, one end of which is a feed end with a screen cylinder inlet at its center, and the other end of which is a discharge end with a discharge port; the screen cylinder is inclined and arranged downwards along the direction from the feed end to the discharge end; a discharge hopper is located below the screen cylinder; and a waste removal hopper is located below the discharge end of the screen cylinder; the screen cylinder includes a feed support cylinder at the feed end, a discharge support cylinder at the discharge end, a cylindrical screen located between the feed support cylinder and the discharge support cylinder, and a quick-opening latch. The feed support cylinder and the discharge support cylinder are connected by multiple support beams, which are evenly arranged around the circumference of the feed support cylinder and the discharge support cylinder. Circumferentially arranged annular mounting blocks are provided on the outer circumference of both the feed support cylinder and the discharge support cylinder. Each annular mounting block has an annular guide groove, and the openings of the annular guide grooves in two annular mounting blocks are arranged face to face. The cylindrical screen is formed by rolling a screen plate that passes through the annular guide groove along the circumference of the feed support cylinder and the discharge support cylinder. The two ends of the screen plate are connected at the joint of the cylindrical screen by quick-release buckles.
[0007] Furthermore, the discharge end of the screen cylinder is hinged to the drive mechanism, which drives the screen cylinder to rotate. A height-adjustable support roller mechanism is provided below the feed end of the screen cylinder. The support roller mechanism supports the screen cylinder. By adjusting the height of the support roller mechanism, the feed end of the screen cylinder can be raised or lowered, thereby adjusting the tilt angle of the screen cylinder.
[0008] Furthermore, the drive mechanism includes a drive shaft, a power motor, a transmission mechanism, a support frame, and a hinge structure. The main shaft of the power motor is connected to one end of the drive shaft through the transmission mechanism. The drive shaft is mounted on the support frame and connected to the support frame through a bearing assembly. The other end of the drive shaft is hinged to the impurity outlet end of the screen cylinder through the hinge structure.
[0009] Furthermore, the roller support mechanism includes rollers symmetrically arranged on both sides of the screen cylinder. The rollers are mounted on a crossbeam. Fixed frames are provided on both sides of the screen cylinder. A lifting groove extending along its height direction is provided in the fixed frame. The openings of the lifting grooves of the two fixed frames are arranged face to face. The two ends of the crossbeam are inserted into the lifting grooves. A lifting mechanism is provided on the fixed frame. The lifting mechanism is connected to the crossbeam and can drive the crossbeam to move up and down along the lifting groove.
[0010] Furthermore, the lifting mechanism includes a lifting screw, the lower end of which is hinged to the crossbeam, the upper end of which is threaded to the fixed frame, and the upper end of which is connected to a power device. The power device drives the lifting screw to rotate relative to the fixed frame, thereby causing the crossbeam to move up and down along the lifting groove. Both ends of the crossbeam are provided with connecting blocks located in the lifting groove. The lower end of the lifting screw is hinged to the connecting block. The connecting block is provided with an inner positioning hole. The fixed frame is provided with multiple outer positioning holes, which are arranged along the height direction of the fixed frame. The connecting block and the fixed frame are positioned and connected by a positioning pin passing through the inner positioning hole and the outer positioning hole.
[0011] Furthermore, the fixed frame is provided with a guide groove along its height direction, and the connecting block is provided with a guide block. The guide block and the guide groove cooperate with each other to guide the crossbeam when it moves up and down.
[0012] The beneficial effects of this utility model are as follows:
[0013] 1. The cylindrical screen of this utility model is formed by rolling a screen plate that is inserted into an annular guide groove along the annular guide groove. The joints of the cylindrical screen are connected by quick-opening buckles. By replacing the screen plates with different apertures, the screen cylinder can be used for the preliminary cleaning of different types of grain materials. The setting of the annular guide groove and quick-opening buckles can facilitate the replacement of the screen plates, realize the rapid replacement of the screen plates, save replacement time, and reduce the labor intensity of replacement.
[0014] 2. The discharge end of the screen cylinder of this utility model is hinged to the drive mechanism. The feed end of the screen cylinder is provided with an adjustable support roller to support the screen cylinder. By adjusting the height of the support roller, the height of the feed end of the screen cylinder can be adjusted, thereby achieving the purpose of adjusting the tilt angle of the screen cylinder, so that the screen cylinder can adapt to the tilt requirements of different types of grains.
[0015] 3. This utility model has a simple structure, low cost, convenient use, and wide application range. By adjusting the inclination angle of the screen cylinder and changing the cylindrical screen to alter the aperture of the screen cylinder, this cylindrical primary cleaning screen can be used for the preliminary cleaning of different types of grains, effectively improving its versatility. This increases screening efficiency and output, while also enhancing its versatility and application range, thus reducing enterprise production costs. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the sieve cylinder of this utility model;
[0018] Figure 3 For the present utility model Figure 2 A schematic diagram of the AA cross-sectional structure;
[0019] Figure 4 This is a schematic diagram of the structure of the roller support mechanism of this utility model;
[0020] Figure 5 For the present utility model Figure 4 Schematic diagram of the BB cross-sectional structure;
[0021] Figure 6 This is a schematic diagram of the feeding mechanism of this utility model. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings.
[0023] like Figure 1 , Figure 2 and Figure 3 As shown, a cylindrical primary cleaning screen with a quick-change screen plate includes a rotatable screen cylinder 1. One end of the screen cylinder 1 is a feed end 101 with a screen cylinder inlet 102 at its center, and the other end of the screen cylinder 1 is a waste outlet end 103 with a waste outlet. The screen cylinder 1 is inclined and arranged downwards along the direction from the feed end 101 to the waste outlet end 103. The screen cylinder 1 includes a feed support cylinder 104 located at the feed end 101, a waste outlet support cylinder 105 located at the waste outlet end 103, a cylindrical screen 106 located between the feed support cylinder 104 and the waste outlet support cylinder 105, and a quick-opening buckle 107. The waste outlet support cylinder 105 is provided with a spiral conveying blade 111. The feed support cylinder 104 and the discharge support cylinder 105 are connected by multiple support beams 108. The multiple support beams 108 are evenly arranged around the circumference of the feed support cylinder 104 and the discharge support cylinder 105. Circumferentially arranged annular mounting blocks 109 are provided on the outer circumference of both the feed support cylinder 104 and the discharge support cylinder 105. The annular mounting blocks 109 are provided with annular guide grooves 110. The openings of the annular guide grooves 110 in the two annular mounting blocks 109 are arranged face to face. The annular mounting blocks 109 have notches for inserting screen plates. The cylindrical screen 106 is formed by rolling a screen plate inserted in the annular guide groove 110 around the circumference of the feed support cylinder 104 and the discharge support cylinder 105. The two ends of the screen plate are connected at the joint of the cylindrical screen 106 by quick-opening buckles 107.
[0024] like Figure 1 , Figure 4 and Figure 5As shown, a discharge hopper 2 is provided below the screen cylinder 1, and a waste removal hopper 3 is provided below the waste discharge end 103 of the screen cylinder 1. The waste discharge end 103 of the screen cylinder 1 is hinged to the drive mechanism 4. The drive mechanism 4 drives the screen cylinder 1 to rotate. A height-adjustable support roller mechanism 5 is provided below the feed end 101 of the screen cylinder 1. The support roller mechanism 5 supports the screen cylinder 1. By adjusting the height of the support roller mechanism 5, the feed end 101 of the screen cylinder 1 can be raised or lowered, thereby adjusting the tilt angle of the screen cylinder 1. The drive mechanism 4 includes a drive shaft 401, a power motor 402, a transmission mechanism 403, a support frame 404, and a hinge structure 405. The main shaft of the power motor 402 is connected to one end of the drive shaft 401 through the transmission mechanism 403. The drive shaft 401 is mounted on the support frame 404 and connected to the support frame 404 through a bearing assembly. The other end of the drive shaft 401 is hinged to the waste discharge end 103 of the screen cylinder 1 through the hinge structure 405. The roller support mechanism 5 includes rollers 501 symmetrically arranged on both sides of the screen cylinder 1. The rollers 501 are mounted on the crossbeam 502. The screen cylinder 1 is provided with fixed frames 507 on both sides. The fixed frames 507 are provided with lifting grooves 503 extending along their height direction. The openings of the lifting grooves 503 of the two fixed frames 507 are arranged face to face. The two ends of the crossbeam 502 are inserted into the lifting grooves 503. The fixed frames 507 are provided with lifting mechanisms. The lifting mechanisms are connected to the crossbeam 502 and can drive the crossbeam 502 to move up and down along the lifting grooves 503. The lifting mechanism includes a lifting screw 504. The lower end of the lifting screw 504 is hinged to a crossbeam 502, and the upper end of the lifting screw 504 is threaded to a fixed frame 507. The upper end of the lifting screw 504 is connected to a power device, which drives the lifting screw 504 to rotate relative to the fixed frame 507, thereby causing the crossbeam 502 to move up and down along the lifting groove 503. Connecting blocks 505 located within the lifting groove 503 are provided at both ends of the crossbeam 502. The lower end of the lifting screw 504 is connected to the connecting blocks... The connecting block 505 is hinged and has an inner positioning hole. The fixing frame 507 has multiple outer positioning holes, which are arranged along the height direction of the fixing frame 507. The connecting block 505 and the fixing frame 507 are positioned and connected by a positioning pin 506 passing through the inner positioning hole and the outer positioning hole. The fixing frame 507 has a guide groove along its height direction, and the connecting block 505 has a guide block. The guide block and the guide groove cooperate with each other to guide the crossbeam 502 when it moves up and down.
[0025] like Figure 1 and Figure 6As shown, the feed end 101 of the screen cylinder 1 is provided with a feeding mechanism 6 connected to the screen cylinder inlet 102. The feeding mechanism 6 includes a feed hopper 601, an inclined chute 602, and a material distribution hopper 603 connected in sequence. The feed hopper 601 is located outside the screen cylinder 1. The inclined chute 602 passes through the screen cylinder inlet 102 from the outside to the inside of the screen cylinder 1, and the center of the inclined chute 602 is concentrically arranged with the screen cylinder inlet 102. The material distribution hopper 603 is located inside the screen cylinder 1. One end of the material distribution hopper 603 is connected to the inclined chute 602, and the opening at the other end of the material distribution hopper 603 is the material outlet 604. The material distribution hopper 603 is arranged inclined inside the screen cylinder 1. It is inclined in the opposite direction to the rotation direction of the screen cylinder 1 along the direction from the inclined chute 602 to the material outlet 604, and the material outlet 604 is located on the side opposite to the rotation direction of the longitudinal centerline of the screen cylinder 1. The feeding hopper 603 is arranged at an angle inside the screen cylinder 1, and its material outlet 604 is located on the side opposite to the rotation direction of the longitudinal centerline of the screen cylinder 1. This structure enables the material outlet 604 of the feeding mechanism 6 to be offset inside the screen cylinder 1, and its offset direction is opposite to the rotation direction of the screen cylinder 1. When the grain material enters the screen cylinder 1, the offset material outlet 604 can advance the drop point of the grain material along the tangential direction of the screen cylinder 1, thereby increasing the contact area between the grain material and the screen cylinder 1 and improving the utilization rate of the screening area of the screen cylinder 1.
[0026] A gravity discharge gate 605 is connected to the material outlet 604 of the feeding mechanism 6. The gravity discharge gate 605 includes a gate panel and a counterweight. The gate panel is hinged to the upper end of the material outlet 604 of the feeding hopper 603, and the counterweight is provided on the gate panel. The gravity discharge gate 605 can effectively reduce the initial velocity of the grain material when it enters the screen cylinder 1, thereby reducing the leap distance of the grain material when it flows out of the inclined chute 602, thus improving the utilization rate of the screening area of the screen cylinder 1 and improving the screening efficiency of the cylindrical primary cleaning screen.
[0027] In use, the power motor 402 is started. The power motor 402 drives the drive shaft 401 to rotate through the transmission mechanism 403, and drives the screen cylinder 1 to rotate through the hinge structure 405. The grain material enters from the feed hopper 601 of the feeding mechanism 6, slides down the inclined chute 602, is guided by the distribution hopper 603, and falls into the screen cylinder 1 from the material outlet 604. The screen cylinder 1 rotates, and the grain material entering the screen cylinder 1 moves in the rotation direction of the screen cylinder 1 under the action of the screen cylinder 1. At the same time, due to the inclined arrangement of the screen cylinder 1, the grain material moves along the rotation direction of the screen cylinder 1. The material moves towards the discharge port along the inclined direction of the screen cylinder 1. The screen cylinder 1 screens and removes impurities from the grain material. The material with particles smaller than the screen hole diameter passes through the screen hole of the screen cylinder 1 and falls into the discharge hopper 2. The impurities with particles larger than the screen hole diameter are left in the screen cylinder 1 and then conveyed to the discharge port under the action of the screw conveyor blades 111. They flow out from the discharge port and fall into the discharge hopper 3, thereby achieving the initial cleaning and removal of impurities from the grain material, removing impurities such as straw, stalks, stones, and soil clods.
[0028] When changing the type of grain and adjusting the aperture of the sieve cylinder 1, open the quick-release buckle 107 of the sieve cylinder 1, take out the existing sieve plate from the notch of the annular mounting block 109 along the annular guide groove 110, then insert the new sieve plate into the annular guide groove 110 and roll it into a new cylindrical sieve 106 along the annular guide groove 110, and then lock the quick-release buckle 107 of the new cylindrical sieve 106 again. When adjusting the tilt angle of the screen cylinder 1, remove the positioning pin 506 in the inner and outer positioning holes of the lifting mechanism, start the power unit of the lifting mechanism, the power unit drives the lifting screw 504 to rotate, and drives the crossbeam 502 to move up and down along the lifting groove 503 of the fixed frame 507, so that the support roller 501 on the crossbeam 502 moves up and down. Since the impurity discharge end 103 of the screen cylinder 1 is hinged to the drive mechanism 4, the support roller 501 moves up and down to raise or lower the height of the feed end 101 of the screen cylinder 1. Since the height of the impurity discharge end 103 of the screen cylinder 1 remains unchanged, raising the height of the feed end 101 of the screen cylinder 1 can increase the tilt angle of the screen cylinder 1, and lowering the height of the feed end 101 of the screen cylinder 1 can decrease the tilt angle of the screen cylinder 1.
[0029] It should be noted that the above-described embodiments are illustrative of the technical solution of this utility model and not limiting. Equivalent substitutions or other modifications made by those skilled in the art based on the prior art, as long as they do not exceed the concept and scope of the technical solution of this utility model, should be included within the scope of the claims of this utility model.
Claims
1. A cylinder cleaner with rapidly replaceable screen decks, characterized in that: The screen includes a rotatable screen cylinder (1), one end of which is the feed end (101) with a screen cylinder inlet (102) at its center, and the other end of which is the discharge end (103) with a discharge port. The screen cylinder (1) is inclined and arranged downwards along the direction from the feed end (101) to the discharge end (103). A discharge hopper (2) is provided below the screen cylinder (1), and a discharge hopper (3) is provided below the discharge end (103) of the screen cylinder (1). The screen cylinder (1) includes a feed support cylinder (104) located at the feed end (101), a discharge support cylinder (105) located at the discharge end (103), a cylindrical screen (106) located between the feed support cylinder (104) and the discharge support cylinder (105), and a quick-opening buckle (107). The feed support cylinder (104) The feed support cylinder (104) and the discharge support cylinder (105) are connected by multiple support beams (108). The multiple support beams (108) are evenly arranged around the feed support cylinder (104) and the discharge support cylinder (105). Circumferentially arranged annular mounting blocks (109) are provided on the outer circumference of the feed support cylinder (104) and the outer circumference of the discharge support cylinder (105). Circumferential guide grooves (110) are provided in the annular mounting blocks (109). The openings of the annular guide grooves (110) in the two annular mounting blocks (109) are arranged face to face. The cylindrical screen (106) is formed by rolling a screen plate that passes through the annular guide groove (110) around the circumference of the feed support cylinder (104) and the discharge support cylinder (105). The two ends of the screen plate are connected at the joint of the cylindrical screen (106) by quick-release buckles (107).
2. The quick-change cylinder cleaning screen according to claim 1, characterized in that: The discharge end (103) of the screen cylinder (1) is hinged to the drive mechanism (4). The drive mechanism (4) drives the screen cylinder (1) to rotate. A height-adjustable support roller mechanism (5) is provided below the feed end (101) of the screen cylinder (1). The support roller mechanism (5) supports the screen cylinder (1). By adjusting the height of the support roller mechanism (5), the feed end (101) of the screen cylinder (1) can be raised or lowered, thereby adjusting the tilt angle of the screen cylinder (1).
3. The quick-change cylinder cleaning screen according to claim 2, characterized in that: The drive mechanism (4) includes a drive shaft (401), a power motor (402), a transmission mechanism (403), a support frame (404), and a hinge structure (405). The main shaft of the power motor (402) is connected to one end of the drive shaft (401) through the transmission mechanism (403). The drive shaft (401) is mounted on the support frame (404) and connected to the support frame (404) through a bearing assembly. The other end of the drive shaft (401) is hinged to the impurity outlet end (103) of the screen cylinder (1) through the hinge structure (405).
4. The quick-change screen cylinder according to claim 2 or 3, characterized in that: The roller support mechanism (5) includes rollers (501) symmetrically arranged on both sides of the screen cylinder (1). The rollers (501) are mounted on the crossbeam (502). The screen cylinder (1) is provided with fixed frames (507) on both sides. The fixed frames (507) are provided with lifting grooves (503) extending along their height direction. The openings of the lifting grooves (503) of the two fixed frames (507) are arranged face to face. The two ends of the crossbeam (502) are inserted into the lifting grooves (503). The fixed frames (507) are provided with lifting mechanisms. The lifting mechanisms are connected to the crossbeam (502) and can drive the crossbeam (502) to move up and down along the lifting grooves (503).
5. The quick-change cylinder cleaning screen of claim 4, wherein: The lifting mechanism includes a lifting screw (504), the lower end of which is hinged to the crossbeam (502), the upper end of which is threaded to the fixed frame (507), and the upper end of which is connected to a power device. The power device drives the lifting screw (504) to rotate relative to the fixed frame (507), thereby driving the crossbeam (502) to move up and down along the lifting groove (503). The two ends of the crossbeam (502) are provided with connecting blocks (505) located in the lifting groove (503). The lower end of the lifting screw (504) is hinged to the connecting block (505). The connecting block (505) is provided with an inner positioning hole. The fixed frame (507) is provided with multiple outer positioning holes. The multiple outer positioning holes are arranged along the height direction of the fixed frame (507). The connecting block (505) and the fixed frame (507) are positioned and connected by a positioning pin (506) passing through the inner positioning hole and the outer positioning hole.
6. The quick-change cylinder cleaning screen of claim 5, wherein: The fixed frame (507) is provided with a guide groove along its height direction, and the connecting block (505) is provided with a guide block. The guide block and the guide groove cooperate with each other to guide the crossbeam (502) when it moves up and down.