Material uniformizing structure for grain cleaning

Abstract

The utility model discloses a material uniformizing structure for grain cleaning in the field of grain cleaning equipment. Comprising a material receiving hopper, two material uniformizing plates, a gravity plate and a vibrator. The material uniformizing plates are fixed to the front side and the rear side of the material receiving hopper, the free ends of the material uniformizing plates incline downwards, and the free end of the first material uniformizing plate is located above the second material uniformizing plate. The two ends of the rotating shaft penetrate through the receiving hopper and are rotationally connected with the receiving hopper, a balance rod is arranged on the portion, penetrating out of the side face of the receiving hopper, of the rotating shaft, and a gravity block is arranged at the end, away from the rotating shaft, of the balance rod. The end, away from the rotating shaft, of the gravity plate inclines downwards and abuts against the inner wall of the front side of the receiving hopper under the action of the gravity block. After being preliminarily dispersed by the first material homogenizing plate and the second material homogenizing plate in the falling process, grains are gathered and dispersed in the length direction of the gravity plate until the gravity plate deflects and a gap is formed between the gravity plate and the inner wall of the material receiving hopper, so that the grains uniformly fall, the grains are dispersed, and the winnowing effect and the discharging uniformity are improved.

Description

Technical Field

[0001] The utility model relates to the field of grain cleaning equipment, in particular to a material equalizing structure used for grain cleaning. Background Art

[0002] In grain cleaning equipment such as grain cleaning screens, after being cleaned by a vibrating screen or a drum screen, the grain still contains some dust and light impurities, and needs to be finally cleaned by air separation before being transported to the next stage of equipment. Most of the current air separation systems are directly installed at the outlet of the vibrating screen or the drum screen, and the screened grain is directly air-separated and cleaned. However, since the grain coming out of the vibrating screen or the drum screen is usually less uniform, the grain is mixed with impurities, resulting in poor air separation effect. At the same time, the grain entering the next stage is not uniform enough, which affects the control of the subsequent feeding speed. Utility Model Content

[0003] In order to overcome the shortcomings of existing grain cleaning screens such as poor air selection effect, uneven discharge speed, and fluctuating flow rate, the technical problem to be solved by the utility model is to provide a material leveling structure for grain cleaning that can improve the air selection effect and discharge uniformity.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] The material equalizing structure for grain cleaning comprises a receiving hopper, a first material equalizing plate and a second material equalizing plate located in the top entrance of the receiving hopper, and a vibrator arranged on the outside of the bottom of the receiving hopper, the fixed ends of the second material equalizing plate and the first material equalizing plate are respectively arranged on the front and rear sides of the receiving hopper, the free ends are inclined downward, and the free end of the first material equalizing plate is located above the free end of the second material equalizing plate, a gravity plate is also provided in the top entrance of the receiving hopper, the gravity plate is located below the second material equalizing plate, and a rotating shaft is provided at one end of the gravity plate close to the rear side of the receiving hopper, the two ends of the rotating shaft pass through the left and right sides of the receiving hopper and are rotatably connected thereto, a balancing rod is provided at the parts of the two ends of the rotating shaft that pass through the side of the receiving hopper, a gravity block is provided at the end of the balancing rod away from the rotating shaft, the end of the gravity plate away from the rotating shaft is inclined downward, and abuts against the inner wall of the front side of the receiving hopper under the action of the gravity block.

[0006] Furthermore, the receiving hopper includes a straight tube section and a chute section located below the straight tube section, the vibrator is located below the chute section, and the first material equalizing plate, the second material equalizing plate and the gravity plate are all arranged in the straight tube section.

[0007] Furthermore, a material balancing tower is provided on the upper surface of the first material balancing plate, and the material balancing tower is a three-layer isosceles triangle plate structure which gradually decreases from bottom to top, and the top angle of the isosceles triangle plate faces the rear side of the receiving hopper, and the bottom edge is parallel to the length direction of the first material balancing plate. The bottom edges of the three isosceles triangle plates coincide, and the bottom angle gradually increases.

[0008] Furthermore, at least two material balancing towers are evenly spaced along the length direction of the first material balancing plate.

[0009] Furthermore, a plug plate is provided on the front side of the straight tube section, and strip holes are provided on both sides of the plug plate in the vertical direction. The plug plate is fixed to the outside of the straight tube section by fastening bolts passing through the strip holes, and an opening for the plug plate to pass through is provided at the portion where the chute section is connected to the straight tube section.

[0010] Furthermore, an upward flange is provided on the bottom plate at the outlet of the chute section, and a plurality of notches are evenly distributed on the flange.

[0011] Furthermore, the fixed ends of the first and second material equalizing plates are fixed to the receiving hopper by bolts, and ear plates are provided on the left and right sides of the first and second material equalizing plates near the free ends, and the ear plates are fixed to the left and right sides of the receiving hopper by bolts.

[0012] Furthermore, one end of the balance rod away from the rotating shaft is a threaded rod, and the gravity block includes a plurality of weight blocks, which are connected to the threaded rod and fixed to the threaded rod through two front and rear locking nuts.

[0013] The beneficial effect of the utility model is as follows: by arranging a first material equalizing plate, a second material equalizing plate and a gravity plate in the receiving hopper, the grain collides with the first material equalizing plate and the second material equalizing plate during the falling process and changes its travel route, thereby achieving initial dispersion, and then the grain gathers between the free end of the gravity plate and the front inner wall of the receiving hopper. As the accumulated grain gradually increases, the grain will be dispersed in the length direction of the gravity plate until the weight of the grain accumulated on the gravity plate is greater than the weight of the gravity block, and the gravity plate deflects, and a gap appears between the gravity plate and the inner wall of the receiving hopper, so that the grain falls evenly, thereby dispersing the grain and improving the air selection effect and the uniformity of the discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the material equalizing tower of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the plug board and the flange of the utility model;

[0017] Marked in the figure are, 1-receiving hopper, 2-first material equalizing plate, 3-second material equalizing plate, 4-gravity plate, 5-vibrator, 6-insert plate, 11-straight cylinder section, 12-chute section, 13-flanged edge, 14-notch, 21-material equalizing tower, 22-ear plate, 41-rotating shaft, 42-balance rod, 43-gravity block, 44-locking nut, 61-bar hole, 62-fastening bolt. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] It should be noted that if there are directional indication terms in the present invention, such as up, down, left, right, front, and back directions and orientation terms, they are for the purpose of facilitating the description of the relative position relationship between components, and are not for the absolute position of the related components or the position relationship between components. They are only used to explain the relative position relationship and movement of the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly. If there are terms related to quantity in the present invention, such as "multiple", "multiple", "several", etc., they specifically refer to two or more.

[0020] like Figure 1-3 As shown, the material equalizing structure for grain cleaning of the utility model comprises a receiving hopper 1, a first material equalizing plate 2 and a second material equalizing plate 3 located in the top entrance of the receiving hopper 1, and a vibrator 5 arranged on the outer side of the bottom of the receiving hopper 1, the fixed ends of the second material equalizing plate 3 and the first material equalizing plate 2 are respectively arranged on the front and rear sides of the receiving hopper 1, and the free ends are inclined downward, and the free end of the first material equalizing plate 2 is located above the free end of the second material equalizing plate 3, and a gravity plate 4 is also provided in the top entrance of the receiving hopper 1, and the gravity plate 4 is located below the second material equalizing plate 3, and a rotating shaft 41 is provided at one end of the gravity plate 4 close to the rear side of the receiving hopper 1, and the two ends of the rotating shaft 41 pass through the left and right sides of the receiving hopper 1 and are rotatably connected thereto, and a balancing rod 42 is provided at the parts of the two ends of the rotating shaft 41 that pass through the side of the receiving hopper 1, and a gravity block 43 is provided at the end of the balancing rod 42 away from the rotating shaft 41, and the end of the gravity plate 4 away from the rotating shaft 41 is inclined downward, and abuts against the inner wall of the front side of the receiving hopper 1 under the action of the gravity block 43.

[0021] In order to facilitate the arrangement of the first material balancing plate 2, the second material balancing plate 3 and the gravity plate 4 in the receiving hopper 1, the preferred solution of the receiving hopper 1 can be Figure 1The structure shown includes a straight tube section 11 and a chute section 12 located below the straight tube section 11, and the two can be integrally formed or welded together by two parts. The vibrator 5 is located below the chute section 12, and the first material equalizing plate 2, the second material equalizing plate 3 and the gravity plate 4 are all arranged in the straight tube section 11. Specifically, during installation, the fixed ends of the first material equalizing plate 2 and the second material equalizing plate 3 are fixed to the receiving hopper 1 by bolts, and the first material equalizing plate 2 and the second material equalizing plate 3 are provided with ear plates 22 on the left and right sides near the free ends, and the ear plates 22 are fixed to the left and right sides of the receiving hopper 1 by bolts. The through holes for the bolts to pass through on the fixed ends of the first material equalizing plate 2 and the second material equalizing plate 3 and the ear plates 22 are preferably strip holes, so as to facilitate the adjustment of the installation position. Regarding the installation method of the gravity block 43, the solution adopted by the utility model is that the end of the balance rod 42 away from the rotating shaft 41 is a threaded rod, and the gravity block 43 includes multiple ones, and an appropriate number is selected according to needs to be connected to the threaded rod, and then fixed to the threaded rod by two front and rear locking nuts 44.

[0022] When the entire material-evening structure is in use, it is set at the grain discharge port of the vibrating screen or the cylindrical screen, and the grain enters from the inlet at the top of the receiving hopper 1 and flows out from the outlet of the chute section 12. The air selection system is set at the outlet of the chute section 12. After being dispersed by the material-evening structure, the grain flows out evenly in the width direction of the chute section 12, so that the impurities and grain are more dispersed, and the impurities are more easily sucked away by the air selection system.

[0023] The material equalization process of the utility model is: Figure 1 As shown, the grain enters from the top of the straight tube section 11, first contacts and collides with the first material balancing plate 2, and spreads along the width direction of the first material balancing plate 2, then collides with the second material balancing plate 3, and further spreads along the width direction of the second material balancing plate 3, and then the grain reaches the gravity plate 4. Since the weight of the gravity block 43 is greater than the weight of the gravity plate 4 in the initial state, the gravity plate 4 tends to rotate clockwise around the rotation axis 41, so the free end of the gravity plate 4 will abut against the inner wall of the straight tube section 11. The grain that falls from the second material equalizing plate 3 will gather in the triangular space formed by the gravity plate 4 and the inner wall of the straight tube section 11. With the increase of grain and the vibration of the vibrator 5, the grain will spread in the width direction of the gravity plate 4 until the weight of the grain plus the gravity plate 4 is greater than the weight of the gravity block 43. The gravity plate 4 will rotate counterclockwise, and a gap will appear between its free end and the inner wall of the straight tube section 11. The grain will fall from the gap. Under the action of the vibrator 5, the efficiency of the grain falling from the gap can be accelerated, so that the grain and impurities can be evenly dispersed in the width direction of the chute section 12 and discharged from the outlet.

[0024] In order to improve the initial dispersion effect of grain when it enters the receiving hopper 1, a preferred solution is to provide a material balancing tower 21 on the upper surface of the first material balancing plate 2. According to the current general width of the vibrating screen is between one and two meters, therefore, in order to improve the dispersion effect, it is best to evenly space at least two material balancing towers 21 along the length direction of the first material balancing plate 2. The specific structure of the material balancing tower 21 is as follows: Figure 1 , Figure 2 As shown, the material balancing tower 21 is a three-layer isosceles triangle plate structure that gradually decreases from bottom to top, and the top angle of the isosceles triangle plate faces the rear side of the receiving hopper 1, and the bottom edge is parallel to the length direction of the first material balancing plate 2. The bottom edges of the three isosceles triangle plates overlap, and the bottom angle gradually increases. When the grain passes through the material balancing tower 21, it will be evenly spread to both sides of the material balancing tower 21, so that the grain is easier to be spread on the second material balancing plate 3 when it reaches the second material balancing plate 3, thereby improving the uniformity of grain distribution.

[0025] Since the gap between the gravity plate 4 and the straight tube section 11 is dynamically adjusted, if the incoming material speed is unstable, the outgoing material speed will also be unstable, so it is not easy to control the outgoing material speed. In order to better control the outgoing material speed of the entire material distribution structure, a further solution is to further provide an insert plate 6 on the front side of the straight tube section 11, such as Figure 1 , Figure 3 As shown, strip holes 61 are provided on both sides of the plug plate 6 in the vertical direction, and the plug plate 6 is fixed to the outside of the straight section 11 by fastening bolts 62 passing through the strip holes 61, and the portion where the chute section 12 is connected to the straight section 11 is provided with an opening for the plug plate 6 to pass through. When the position of the plug plate 6 needs to be adjusted, the fastening bolts 62 are first loosened, and then the plug plate 6 is moved upward or downward. A scale line can be set in the length direction of the strip hole 61, and the distance from the bottom of the plug plate 6 to the bottom plate of the chute section 12 is displayed by the position of the fastening bolts 62 on the scale line. Finally, after moving into position, the plug plate 6 is fixed by tightening the fastening bolts 62. The plug plate 6 can be adjusted according to the grain variety or actual production requirements, and plays a role in limiting the flow, preventing excessive flow from affecting the cleaning effect of subsequent equipment, and ensuring the stability of the grain discharge speed.

[0026] The grain particles coming out of the chute section 12 are relatively close to each other, which may easily block dust and other impurities during the air selection process. Figure 3 As shown, an upward flange 13 is also provided on the bottom plate at the outlet of the chute section 12, and a plurality of notches 14 are evenly distributed on the flange 13. When grains pass through the notches 14, there will be gaps between adjacent grain particles in the lateral direction, making it easier for wind and impurities to pass through the gaps, thereby further improving the wind selection effect.

Claims

1. A material balancing structure for grain cleaning, comprising a material receiving hopper (1), a first material balancing plate (2) and a second material balancing plate (3) located in a top entrance of the material receiving hopper (1), and a vibrator (5) arranged outside the bottom of the material receiving hopper (1), wherein the fixed ends of the second material balancing plate (3) and the first material balancing plate (2) are respectively arranged at the front and rear sides of the material receiving hopper (1), and the free ends are inclined downward, and the free end of the first material balancing plate (2) is located above the free end of the second material balancing plate (3), characterized in that: A gravity plate (4) is also provided in the top entrance of the receiving hopper (1). The gravity plate (4) is located below the second material equalizing plate (3). A rotating shaft (41) is provided at one end of the gravity plate (4) close to the rear side of the receiving hopper (1). Both ends of the rotating shaft (41) pass through the left and right sides of the receiving hopper (1) and are rotatably connected thereto. Balance rods (42) are provided at the parts of the two ends of the rotating shaft (41) that pass through the side of the receiving hopper (1). A gravity block (43) is provided at one end of the balance rod (42) away from the rotating shaft (41). The end of the gravity plate (4) away from the rotating shaft (41) is tilted downward and abuts against the inner wall of the front side of the receiving hopper (1) under the action of the gravity block (43).

2. The material distribution structure for grain cleaning according to claim 1, characterized in that: The receiving hopper (1) comprises a straight tube section (11) and a chute section (12) located below the straight tube section (11); the vibrator (5) is located below the chute section (12); and the first material balancing plate (2), the second material balancing plate (3) and the gravity plate (4) are all arranged in the straight tube section (11).

3. The material distribution structure for grain cleaning according to claim 1, characterized in that: A material balancing tower (21) is provided on the upper surface of the first material balancing plate (2). The material balancing tower (21) is a three-layer isosceles triangle plate structure that gradually decreases from bottom to top, and the top angle of the isosceles triangle plate faces the rear side of the receiving hopper (1), and the bottom edge is parallel to the length direction of the first material balancing plate (2). The bottom edges of the three isosceles triangle plates overlap, and the bottom angle gradually increases.

4. The material distribution structure for grain cleaning according to claim 3, characterized in that: At least two material balancing towers (21) are evenly spaced along the length direction of the first material balancing plate (2).

5. The material distribution structure for grain cleaning according to claim 2, characterized in that: A plug plate (6) is provided on the front side of the straight tube section (11), strip holes (61) are provided on both sides of the plug plate (6) in the vertical direction, the plug plate (6) is fixed to the outside of the straight tube section (11) by means of fastening bolts (62) passing through the strip holes (61), and an opening for the plug plate (6) to pass through is provided at a portion where the chute section (12) is connected to the straight tube section (11).

6. The material distribution structure for grain cleaning according to claim 2, characterized in that: An upward flange (13) is provided on the bottom plate at the outlet of the chute section (12), and a plurality of notches (14) are evenly distributed on the flange (13).

7. The material distribution structure for grain cleaning according to claim 1, characterized in that: The fixed ends of the first material balancing plate (2) and the second material balancing plate (3) are fixed to the receiving hopper (1) by means of bolts, and the first material balancing plate (2) and the second material balancing plate (3) are provided with ear plates (22) at positions close to the free ends on the left and right sides, and the ear plates (22) are fixed to the left and right sides of the receiving hopper (1) by means of bolts.

8. The material distribution structure for grain cleaning according to claim 1, characterized in that: One end of the balance rod (42) away from the rotating shaft (41) is a threaded rod, and the gravity blocks (43) include a plurality of weight blocks that are threaded onto the threaded rod and fixed to the threaded rod via two front and rear locking nuts (44).

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