Buffer feeding unit and winnowing impurity remover

Abstract

The utility model discloses a buffering feeding unit which comprises a feeding hopper and at least one stage of material guiding plate which is used for receiving discharged materials of the feeding hopper and is arranged in an inclined mode, at least one side wall of the feeding hopper is settled to form a material overflowing groove, and the overflowing direction of the materials in the feeding hopper is the same as and / or opposite to the moving direction of the materials on the first material guiding plate on the uppermost layer. The utility model further provides a winnowing impurity remover, and the buffering feeding unit is used for feeding. The material guiding device has the advantages that the state of materials provided by the material guiding plate can be ensured to be consistent, the impact of the materials is reduced, and the damage of the materials is reduced. By means of buffering and uniform feeding of the buffering feeding unit, when materials gradually slide down on the material guide plate, impurities with small density gradually float to the surfaces of the materials, the impurities are sucked out through negative pressure provided by the negative pressure pipeline, and the impurity removal effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of particle material impurity removal, and in particular relates to a buffer feed unit and an air separation impurity remover. Background Art

[0002] The production and processing of rice and other grains involves multiple grinding and husking processes. After each processing step, it is basically necessary to remove foreign matter such as dust and rice husks from the rice. The existing technology generally uses negative pressure absorption to separate foreign matter such as rice husks.

[0003] The invention patent application with publication number CN109821598A discloses a rice cooling and bran extractor, in which rice is fed into a feed box through a chute, and falls into a grading screen surface through multi-stage guides, and a negative pressure suction hood is set on the inner side of the screen surface to separate debris. In the production of rice and other grains, the equipment at each level is generally at different heights, and the chute is used to connect two processes with a height difference before and after. Since the flow rate of the chute and the processing flow rate of the impurity removal equipment are much lower than the flow rate of the previous feeding, grinding and other processes, the setting angle and position of the chute when the upper and lower layers are connected by the chute are relatively complicated, and there will be a particularly large inclination angle, which will cause the material to slide down and accelerate in the chute and hit the side of the feed box at high speed, causing the material to be easily broken. And in the subsequent circulation process, the material cannot be effectively and evenly distributed, resulting in the inability to separate light foreign matter from the accumulated material flow, affecting the impurity removal effect. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a buffer feeding unit to reduce the impact of feeding through a chute and reduce material damage; in addition, the utility model also provides an air separator with the buffer feeding unit.

[0005] In the first aspect, the utility model provides a buffer feeding unit, comprising a feed hopper and at least one level of guide plate which receives the discharge of the feed hopper and is arranged obliquely, at least one side wall of the feed hopper is settled to form an overflow trough, and the direction in which the material overflows from the feed hopper is the same and / or opposite to the movement direction of the material on the topmost first guide plate.

[0006] When feeding, the utility model firstly falls into the feed hopper and falls on the first guide plate of the uppermost layer through the outlet of the feed hopper. Since the discharge speed of the hopper-shaped structure is slow, the material will gradually accumulate in the feed hopper. When the accumulation height reaches the height of the overflow trough, the material overflows from the overflow trough and falls on the first guide plate below, so that the impact force of the upper feeding equipment is buffered by the feed hopper and falls on the guide plate. The material is evenly distributed in the lateral space of the guide plate through the cooperation of the outlet of the feed hopper and the overflow trough, so that uniform feeding is achieved. No matter how the speed and angle of the material of the upper feeding equipment change, the material state provided to the guide plate can be guaranteed to be consistent, thereby reducing the impact of the material and reducing the damage of the material.

[0007] Preferably, the overflow groove is arranged on a side surface close to the upper end of the first guide plate.

[0008] Preferably, the discharge port at the bottom of the feed hopper is located above the first guide plate, and the discharge port is in a rectangular structure and the length direction is parallel to the width direction of the first guide plate.

[0009] Preferably, the upper side of the feed hopper side has an outer flange for mounting the feed hopper.

[0010] Preferably, when the number of the guide plates exceeds one, the lower end of the upper guide plate should be above the vertical projection area of ​​the material movement path on the lower guide plate.

[0011] The utility model also provides an air separation and impurity remover, which uses the buffer feeding unit to feed materials.

[0012] Preferably, it also includes a box body, the feed hopper is fixed at the feed end of the box body, at least one level of the guide plate is respectively installed obliquely in the box body, and the box body is also provided with a debris removal port, the debris removal port is connected to a negative pressure pipe, and the suction direction of the negative pressure pipe is toward the flow path of the material in the box body.

[0013] The utility model uses the buffering and uniform feeding of the buffering feeding unit. When the material gradually slides down the material guide plate, the debris with smaller density gradually floats to the surface of the material, and the debris is sucked out by the negative pressure provided by the negative pressure pipeline, thereby achieving the effect of removing debris.

[0014] Preferably, it also includes a fan, which is connected to an air duct, and the air outlet of the air duct is inclined upward and located below the outlet of the second material guide plate at the lowest layer.

[0015] Preferably, the bottom of the box body has a material discharge outlet below the outlet of the second material guide plate, and a material baffle is provided on one side of the material discharge outlet close to the second material guide plate.

[0016] Preferably, an air outlet baffle is provided on the end face of the air outlet, the air outlet baffle is respectively connected to the material baffle and the second material guide plate, and the air outlet baffle is provided with mesh holes at least in the area corresponding to the air outlet.

[0017] Preferably, the impurity removal port is located higher than the material flow path, and is located on the first side surface of the box body toward which the discharge end of the second material guide plate at the bottom layer is directed, or is located on the upper surface of the box body and close to the first side surface.

[0018] Preferably, the upper end of the first side surface is inclined toward the outside of the box body, and the inclination angle of the first side surface is 50°~80°.

[0019] Preferably, an air guide plate is provided on at least one side of the impurity removal port, and the end of the air guide plate is close to the surface of the second material guide plate at the bottom layer.

[0020] Preferably, a wind force detection hole is also provided on the side of the box body, and the wind force detection hole is closed by a cover plate.

[0021] The advantages of the buffer feed unit and the air separation impurity remover provided by the utility model are: when feeding, the material first falls into the feed hopper, and the material falls on the first guide plate of the uppermost layer through the outlet of the feed hopper. Since the discharge speed of the bucket-shaped structure is slow, the material will gradually accumulate in the feed hopper. When the accumulation height reaches the height of the overflow trough, the material overflows from the overflow trough and falls on the first guide plate below, so that the impact force of the upper feeding device is buffered by the feed hopper and falls on the guide plate, and the material is evenly distributed in the lateral space of the guide plate through the cooperation of the feed hopper outlet and the overflow trough, so as to achieve uniform feeding. No matter how the speed and angle of the material of the upper feeding device change, it can ensure that the material state provided to the guide plate is consistent, reducing the impact of the material and reducing the damage of the material. Through the buffering and uniform feeding of the buffer feed unit, when the material gradually slides down on the guide plate, the impurities with lower density gradually float to the surface of the material, and the impurities are sucked out by the negative pressure provided by the negative pressure pipe, so as to achieve the effect of impurity removal.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a schematic diagram of a buffer feed unit provided in an embodiment of the utility model;

[0025] Figure 2It is a schematic diagram of a feed hopper provided in an embodiment of the utility model;

[0026] Figure 3 This is one of the schematic diagrams of the multi-stage material guide plate provided in the embodiment of the utility model;

[0027] Figure 4 This is the second schematic diagram of the multi-stage material guide plate provided in the embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the air separation and impurity remover provided in an embodiment of the utility model.

[0029] Among them, there are a feed hopper 1, an overflow chute 11, a discharge port 12, an outer flange 13, a guide plate 2, a first guide plate 21, a second guide plate 22, a box body 3, a first side surface 31, a wind force detection hole 32, a debris removal port 4, a negative pressure duct 41, an air guide plate 42, a fan 5, an air duct 51, an air outlet baffle 52, a material discharge port 6, and a material baffle 61. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0031] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0032] Combination Figure 1-Figure 3 The present embodiment provides a buffer feeding unit, comprising a feed hopper 1 and at least one level of guide plate 2 which receives the discharge of the feed hopper 1 and is arranged obliquely, at least one side wall of the feed hopper 1 is settled to form an overflow groove 11, and the direction in which the material in the feed hopper overflows from the overflow groove 11 is the same as or opposite to the movement direction of the material on the topmost first guide plate 21.

[0033] When feeding, the material first falls into the feed hopper 1, and falls on the first guide plate 21 on the top layer through the outlet of the feed hopper 1. Since the discharge speed of the hopper-shaped structure is slow, the material will gradually accumulate in the feed hopper 1. When the accumulation height reaches the height of the overflow trough 11, the material overflows from the overflow trough 11 and falls on the first guide plate 21 below, so that the impact force of the upper feeding equipment is buffered by the feed hopper 1 and falls on the guide plate 2. Through the cooperation of the outlet 12 of the feed hopper 1 and the overflow trough 11, the material is evenly distributed in the lateral space of the guide plate 2, so as to achieve uniform feeding. No matter how the speed and angle of the material of the upper feeding equipment change, it can ensure that the material state provided to the guide plate 2 is consistent, thereby reducing the impact of the material and reducing the material damage.

[0034] When the material falls from the overflow chute 11 onto the guide plate 2, it moves downward along the guide plate 2. At the same time, when the material falls onto the guide plate 2, it disperses to both sides, so that the material is roughly evenly distributed in the lateral space of the guide plate 2. In some embodiments, the opening width l of the overflow chute 11 and the lateral width d of the guide plate 2 satisfy the relationship d / 2≤l≤d, and the central axis of the feed hopper 1 in the width direction coincides with the central axis of the guide plate 2.

[0035] Refer to Figure 1 In some embodiments, the overflow chute 11 is arranged toward the upper end of the first guide plate 21, that is, the direction of material overflowing from the overflow chute 11 is opposite to the movement direction of the material on the first guide plate 21, so as to increase the movement distance of the material on the first guide plate 21 and provide more sufficient lateral overflow space to make the material evenly distributed.

[0036] Combination Figure 2 The discharge port 12 at the bottom of the feed hopper 1 is located above the first guide plate 21. In some embodiments, the discharge port 12 is a rectangular structure, and the length direction of the discharge port 12 is parallel to the width direction of the first guide plate 21, so that the material flowing out of the discharge port 12 can also be evenly distributed in the width direction of the first guide plate 21.

[0037] The feed hopper 1 is preferably arranged above the first guide plate 21 in the vertical direction, and the discharge direction of the discharge port 12 falls on the first guide plate 21 in the vertical direction. In some embodiments, the discharge port 12 can also be perpendicular to the first guide plate 21 or form a certain angle with the surface of the first guide plate 21.

[0038] Refer to Figure 2 The upper side of the feed hopper 1 has an outer flange 13 for installing the feed hopper 1. The outer flange 13 can be installed and fixed by bolts and other fixing parts. The outer flange 13 can form a circle on the upper surface of the feed hopper 1, and can also have a notch at the position corresponding to the overflow groove 11.

[0039] refer to Figure 1 , Figure 3 and Figure 4 The guide plate 2 can be set as a multi-level inclined plate structure. The guide directions of the multi-level guide plates 2 can be staggered or completely the same. For the convenience of description, the uppermost guide plate is defined as the first guide plate 21, and the lowermost guide plate is defined as the second guide plate 22. Figure 1 In the illustrated embodiment, if only one level of the guide plate 2 is provided, the first guide plate 21 and the second guide plate 22 both refer to the only guide plate 2. In the case of multiple levels of the guide plates 2, the lower end of the upper guide plate 2 should be located above the vertical projection area of ​​the material movement path on the lower guide plate 2, so that the light impurities in the material are gradually separated from the material or located on the upper layer of the material through multiple conveying, so as to facilitate the subsequent process of dust removal by negative pressure.

[0040] This embodiment also provides an air separation and impurity remover, which uses the buffer feeding unit for feeding.

[0041] Specifically, refer to Figure 5 The air separation and impurity removal device includes a box body 3, the feed hopper 1 is fixed to the feed end of the box body 3, and at least one level of the guide plate 2 is installed obliquely inside the box body 3. During the specific installation, the two lateral ends of the guide plate 2 are respectively in contact with the two side surfaces of the box body 3. The box body 3 is also provided with an impurity removal port 4, and the impurity removal port 4 is connected to a negative pressure pipe 41, and the suction direction of the negative pressure pipe 41 is toward the flow path of the material in the box body 3.

[0042] Through the buffering and uniform feeding of the buffer feeding unit, when the material gradually slides down on the guide plate 2, the debris with lower density gradually floats to the surface of the material, and the debris is sucked out by the negative pressure provided by the negative pressure pipe 41, thereby achieving the effect of removing debris.

[0043] Furthermore, in order to improve the impurity removal effect, a fan 5 is also provided on the box body 3, and the fan 5 is connected to an air duct 51. The air outlet of the air duct 51 (not shown in the figure) is inclined upward and is located below the outlet of the second material guide plate 22 (when there is only one level of material guide plate, it is the material guide plate 2, the same below) of the lowest layer; after the material leaves the second material guide plate 22, the air duct 51 blows air to the material from below to blow out the light impurities therein, thereby making it easier for the impurities to be sucked away by the negative pressure pipe 41, thereby significantly improving the impurity removal effect.

[0044] The bottom of the box body 3 has a material discharge port 6 below the outlet of the second material guide plate 22, and a material baffle 61 is provided on the side of the material discharge port 6 close to the second material guide plate 22. The material baffle 61 separates the cavity space where the air duct 51 is located and the working space of the negative pressure pipe 41, ensuring that all materials can leave the box body 3 through the material discharge port 6.

[0045] Furthermore, an air outlet baffle 52 is provided on the end face of the air outlet of the air duct 51, and the air outlet baffle 52 is respectively connected to the material baffle 61 and the second material guide plate 22. The air outlet baffle 52 is provided with mesh holes at least in the area corresponding to the air outlet to ensure normal air outlet of the air duct 51 and prevent material from entering the air duct 51.

[0046] In some embodiments, the air outlet baffle 52 can be directly extended along the end of the second material guide plate 22 to connect to the material baffle 61. The material flows through the surface of the air outlet baffle 52. When passing through the air outlet area, the air duct 51 blows away the debris. Normal material flows out from the end of the air outlet baffle 52 and falls into the material discharge port 6, leaving the box 3.

[0047] In some embodiments, the upper end of the air outlet baffle 52 is connected to the lower surface of the second material guide plate 22, and the angle of the air outlet baffle 52 relative to the vertical direction is smaller than the angle of the second material guide plate 22 relative to the vertical direction. After the material leaves the end of the second material guide plate 22, it moves parabolically across the area of ​​the air outlet baffle 52, and the air duct 51 blows out the debris by continuous blowing, and normal materials leave the box 3 through the material discharge port 6.

[0048] Furthermore, the position of the impurity removal port 4 should be higher than the material flow path to prevent the material from entering the impurity removal port. In a preferred embodiment, the impurity removal port 4 is arranged on the first side surface 31 of the box body 3 facing the end of the second material guide plate 22, or is located on the upper surface of the box body 3 close to the first side surface 31, so that the impurity removal port 4 is as close as possible to the end of the second material guide plate 22 to maintain a good negative pressure dust removal effect.

[0049] In some embodiments, the first side surface 31 is arranged in the vertical direction, and the airflow blown out by the air duct 51 in the oblique upward direction will blow out the debris that moves obliquely downward with the material. Under the combined action of the two movements, some debris will move to the position of the first side surface 31 and be reflected downward by the first side surface 31 to enter the material discharge port 6.

[0050] To further improve the dust removal effect, in a preferred embodiment, the upper end of the first side surface 31 is inclined toward the outside of the box body 3, so that the debris can move upward after being reflected by the first side surface 31, and enter the debris removal port 4 under the action of negative pressure. The inclination angle of the first side surface 31 relative to the vertical plane is preferably 50° to 80°.

[0051] Furthermore, in order to improve the negative pressure dust removal effect, at least one side of the impurity removal port 4 is provided with an air guide plate 42 to constrain the airflow, and the end of the air guide plate 42 is close to the surface of the second material guide plate 22. The other side of the impurity removal port 4 is constrained by the first side surface 31 to form an impurity removal channel.

[0052] The side of the box body 3 is also provided with a wind force detection hole 32, which is arranged near the impurity removal port 4. The wind force detection hole 32 can be closed by a cover plate (not shown), and the cover plate can use a soft plug structure such as a rubber plug or a wooden plug, or a bolt or other structure. When the wind force detection hole 32 is opened, a wind force sensor can be inserted into the wind force detection hole 32 to detect the negative pressure wind force at the impurity removal port 4, so as to realize the quantitative detection and control of the negative pressure effect, so as to study and determine the optimal working parameters.

[0053] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, all of which are within the protection of the utility model.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. Buffer feeding unit, characterized in that, It includes a feed hopper and at least one level of guide plate that receives the discharge of the feed hopper and is arranged obliquely. At least one side wall of the feed hopper is settled to form an overflow trough. The direction in which the material in the feed hopper overflows is the same and / or opposite to the movement direction of the material on the uppermost first guide plate.

2. The buffer feed unit according to claim 1, characterized in that: The overflow groove is arranged on a side surface close to the upper end of the first material guide plate.

3. The buffer feed unit according to claim 1, characterized in that: The discharge port at the bottom of the feed hopper is located above the first guide plate. The discharge port is in a rectangular structure and its length direction is parallel to the width direction of the first guide plate.

4. The buffer feed unit according to claim 1, characterized in that: An outer flange for installing the feed hopper is provided above the side surface of the feed hopper.

5. The buffer feed unit according to claim 1, characterized in that: When the number of the guide plates exceeds one, the lower end of the upper guide plate should be above the vertical projection area of ​​the material movement path on the lower guide plate.

6. The wind separator is characterized by: Use the buffer feed unit described in any one of claims 1-5 to feed the material.

7. The wind separator according to claim 6, characterized in that: It also includes a box body, the feed hopper is fixed at the feed end of the box body, at least one level of the material guide plate is respectively installed obliquely in the box body, and the box body is also provided with a debris removal port, the debris removal port is connected to a negative pressure pipe, and the suction direction of the negative pressure pipe is toward the flow path of the material in the box body.

8. The wind separator according to claim 7, characterized in that: It also includes a fan, which is connected to an air duct, and the air outlet of the air duct is inclined upward and located below the outlet of the second material guide plate at the lowest layer.

9. The wind separator according to claim 8, characterized in that: The bottom of the box body is provided with a material discharge outlet below the outlet of the second material guide plate, and a material baffle is arranged on one side of the material discharge outlet close to the second material guide plate.

10. The wind separator according to claim 9, characterized in that: An air outlet baffle is disposed on the end surface of the air outlet, and the air outlet baffle is respectively connected to the material baffle and the second material guide plate, and the air outlet baffle is provided with mesh holes at least in the area corresponding to the air outlet.

11. The wind separator according to any one of claims 8 to 10, characterized in that: The position of the impurity removal port is higher than the material flow path, and is located on the first side surface of the box body toward which the discharge end of the second material guide plate at the bottom layer is facing, or is located on the upper surface of the box body and close to the first side surface.

12. The wind separator according to claim 11, characterized in that: The upper end of the first side surface is inclined toward the outer side of the box body, and the inclination angle of the first side surface is 50°~80°.

13. The wind separator according to any one of claims 7 to 10, characterized in that: An air guide plate is disposed at least on one side of the impurity removal port, and a distal end of the air guide plate is close to a surface of a second material guide plate at the lowest layer.

14. The wind separator according to claim 7, characterized in that: The side of the box body is also provided with a wind force detection hole, and the wind force detection hole is closed by a cover plate.

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