A suction separator for grain screening

Abstract

The utility model relates to a kind of air suction separators for grain screening, including left and right arrangement's winnowing chamber and settling chamber, and there is communicating port between winnowing chamber and settling chamber, and the upper portion of settling chamber is equipped with suction pipe, for connecting fan assembly, and the lower portion of settling chamber is equipped with miscellaneous outlet, and winnowing chamber includes grain passage, passage adjusting mechanism, the upper portion of grain passage is feed inlet, and the lower portion is discharge port, and passage adjusting mechanism includes adjusting box in the left side of grain passage, and hanging plate is equipped in adjusting box, and the bottom of hanging plate is hinged with guide plate, and guide plate is obliquely arranged and its end extends into grain passage, and tensile spring is equipped in adjusting box, and the lower end of tensile spring is connected on the upper side of guide plate.The guide plate can swing up and down self-adapting with the gravity condition of grain falling, to change the size of passage, more conducive to the separation of light impurities in grain.

Description

Technical Field

[0001] This utility model relates to the field of screening and impurity removal technology, specifically to a suction separator for grain screening. Background Technology

[0002] A grain suction separator is a relatively simple and effective air-separation cleaning device. It removes light impurities and dust from grain through a clever combination of airflow, gravity, and mechanical structure, making it indispensable in the cleaning process of grain processing plants (such as flour mills, rice mills, and feed mills). For example, the grain screening air-separation device disclosed in patent announcement number CN 209549984 U involves grain entering the material channel through the air-separation inlet on the air-separation box. A fan ventilates the air-separation box from one side of the inlet, blowing light impurities mixed in with the grain towards the ventilation channel. These light impurities then enter the air-separation chamber through the ventilation channel, falling to the bottom of the chamber. The material is then discharged downwards through the outlet of the material channel. This patent incorporates several inverted V-shaped material plates in the material channel to prevent some grain from being directly sucked away by the airflow. In practice, the grain flow rate at the inlet is not constant. When the grain flow rate is low, the material channel space is large, which is not conducive to generating sufficient airflow pressure; while when the grain flow rate is high, the bend in the channel formed by the inverted V-shaped material plates is not conducive to the grain falling. Utility Model Content

[0003] The purpose of this invention is to provide a suction separator for grain screening, which, through structural optimization, can adapt to the flow rate of the fed grain.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The grain screening air separator includes a left-right air separation chamber and a settling chamber. There is a connecting port between the air separation chamber and the settling chamber. The upper part of the settling chamber is equipped with an air suction pipe for connecting to the fan assembly. The lower part of the settling chamber is equipped with a waste outlet. The air separation chamber includes a grain channel and a channel adjustment mechanism. The upper part of the grain channel is the feed inlet and the lower part is the discharge outlet. The channel adjustment mechanism includes an adjustment box located on the left side of the grain channel. The adjustment box is equipped with a hanging plate. A guide plate is hinged to the bottom of the hanging plate. The guide plate is inclined and its end extends into the grain channel. The adjustment box is equipped with a tension spring. The lower end of the tension spring is connected to the upper side of the guide plate.

[0005] Furthermore, the grain channel has a slot on the left side for the guide plate to pass through, a first hanging ear is provided above the slot on the outside of the grain channel, and a second hanging ear is provided on the upper side of the guide plate. The two ends of the tension spring are respectively connected to the first hanging ear and the second hanging ear.

[0006] Furthermore, the adjustment box includes a rectangular box body and an outer cover plate, the cover plate being detachably connected to the box body, and a sealing strip being provided between the cover plate and the box body.

[0007] Furthermore, the box body is provided with an adjusting pad, the adjusting pad has an inclined threaded hole, and an adjusting rod is installed in the threaded hole. The upper end of the adjusting rod is located in the box body and is used to selectively abut against the lower side of the guide plate. The lower end of the adjusting rod is located outside the box body.

[0008] Furthermore, a rubber block is provided at the upper end of the adjusting rod.

[0009] Furthermore, a make-up air window is provided on the left side of the grain channel. The make-up air window includes multiple make-up air holes and is located below the regulating box.

[0010] Furthermore, the air supply window is provided with an air supply adjustment component, which includes a support vertical rod and a baffle plate. There are two support vertical rods, and slip rings are provided on both sides of the baffle plate in the width direction. The slip rings are sleeved on the support vertical rods, and locking nuts are provided on the support vertical rods to support the slip rings.

[0011] Furthermore, a support strip is provided on the outer side of the grain channel, and the bottom of the support vertical rod is fixed on the support strip. The support strip has a through hole that runs vertically through the grain channel, through which the baffle plate passes.

[0012] Furthermore, the air separation chamber is equipped with a partition that extends downward from the top of the grain channel. The partition divides the cavity of the air separation chamber into a grain channel arranged on the left and right and a dirt removal channel. The dirt removal channel is directly connected to the connecting port.

[0013] Furthermore, the settling chamber includes an upper chamber and a lower chamber, with the bottom of the upper chamber having a tapered structure; a baffle plate is provided in the upper chamber, and the baffle plate is located to the lower left of the suction pipe.

[0014] The beneficial effects of this utility model are: A channel adjustment mechanism is installed on the outside of the grain channel. A tension spring is housed within the adjustment box, with its lower end connected to the upper side of a guide plate. One end of the guide plate is hinged, and the other end extends into the grain channel. When the grain flow rate is high, the greater gravity pushes the guide plate downwards, causing it to swing downwards and increasing the actual discharge channel size. A larger opening allows the grain to flow down faster. When the flow rate is low, the guide plate can swing upwards due to the force of the tension spring, reducing the actual discharge channel size and decreasing the grain flow velocity. This also helps create a negative pressure chamber to increase airflow. This channel adjustment mechanism adapts to the grain flow rate.

[0015] Furthermore, a baffle is installed in the grain channel to prevent some of the grain coming down from the inlet from directly entering the connecting port due to the airflow force. The airflow must bypass the lower part of the baffle before changing direction and rising to the connecting port. Since the grain is relatively heavy, it is not easily carried away by the bent airflow, which is more conducive to the separation of impurities from the grain. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a partial cross-sectional view of the adjustment box of this utility model; Figure 4 This is a partial view of the air supply area of ​​this utility model.

[0017] 1. Grain channel; 11. Feed inlet; 12. Discharge outlet; 13. Partition; 2. Settling chamber; 21. Air intake; 22. Impurity outlet; 23. Connecting outlet; 24. Impurity baffle; 3. Adjustment box; 31. Box body; 32. Cover plate; 4. Air supply window; 41. Air supply hole; 51. Baffle plate; 52. Support bar; 53. Supporting vertical rod; 54. Locking nut; 61. Hanging plate; 62. Guide plate; 63. Tension spring; 64. Hinge; 71. Adjusting pad; 72. Adjusting rod; 73. Rubber block. Detailed Implementation 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0018] Embodiments of this utility model: like Figures 1 to 4 As shown, the grain screening air separator includes an air separation chamber and a settling chamber 2 arranged on the left and right sides. There is a connecting port 23 between the air separation chamber and the settling chamber 2, and the connecting port 23 is located at the top. The upper part of the settling chamber 2 is provided with an air intake 21 for connecting the fan assembly, and the lower part of the settling chamber 2 is provided with a waste outlet 22.

[0019] The fan assembly can adopt existing solutions without modification, such as the technical solutions mentioned in the background section. The fan assembly may include a suction fan and a matching dust collector, which are connected to the suction port 21 through a pipe. It can generate airflow within the device to separate light impurities from the grain.

[0020] The air separation chamber includes a grain channel 1 and a channel adjustment mechanism. The upper part of the grain channel 1 is the feed inlet 11 and the lower part is the discharge outlet 12. The grain to be screened flows in from the feed inlet 11 and is discharged through the discharge outlet 12 after impurity removal.

[0021] A partition 13 is provided in the air separation chamber, extending downwards from the top of the grain channel 1. The partition 13 divides the chamber into a grain channel 1 arranged on the left and right, and a removal channel. The removal channel is directly connected to the connecting port 23. By setting the partition 13, some of the grain coming down from the feed inlet 11 is prevented from directly entering the connecting port 23 due to the airflow force. After setting the partition 13, the grain can fall vertically for a certain distance. Since the airflow must bypass the lower part of the partition 13 before changing direction and rising again to the connecting port 23, the grain is relatively heavy and not easily carried away by the bent airflow, but impurities can be carried away, thus making it more convenient for impurities to be separated from the grain.

[0022] The channel adjustment mechanism includes an adjustment box 3 located on the left side of the grain channel 1. The adjustment box 3 contains a hanging plate 61, and a guide plate 62 is hinged to the bottom of the hanging plate 61 via a hinge 64 or a hinge chain. The guide plate 62 is inclined and its end extends into the grain channel 1, allowing it to swing up and down. A slot is provided on the left side of the grain channel 1 for the guide plate 62 to pass through. The slot is rectangular and its height is greater than the thickness of the guide plate 62, allowing the guide plate 62 to pass through and also accommodating its swing within a certain angle range in the vertical direction.

[0023] The regulating box 3 is equipped with a tension spring 63, the lower end of which is connected to the upper side of the guide plate 62. A first lug is located above the opening on the outer side of the grain channel 1, and a second lug is located on the upper side of the guide plate 62. The two ends of the tension spring 63 are connected to the first and second lugs respectively. When the grain flow rate is high, the greater gravity can press the guide plate 62 downwards, causing it to swing downwards and increasing the actual discharge channel in the grain channel 1. A larger opening allows the grain to flow down faster. When the flow rate is low, the guide plate 62 can swing upwards due to the force of the tension spring 63, reducing the actual discharge channel and decreasing the grain flow rate. This also helps to create a negative pressure cavity to increase the wind speed.

[0024] The housing 31 is equipped with an adjusting pad 71, which has an inclined threaded hole. An adjusting rod 72 is fitted into the threaded hole. The upper end of the adjusting rod 72 is located inside the housing 31 and is used to selectively abut against the lower side of the guide plate 62. The lower end of the adjusting rod 72 is located outside the housing 31. The adjusting rod 72 is inclined and can be a long bolt. The position of its upper end can be adjusted by screwing it to control the lower limit of the downward swing of the guide plate 62.

[0025] The upper end of the adjusting rod 72 is equipped with a rubber block 73, which increases the contact area and also has a certain buffering effect.

[0026] The aforementioned tension spring 63 and adjusting rod 72 are each provided in three spaced intervals in the front-to-back direction.

[0027] The regulating box 3 includes a rectangular box body 31 and an outer cover plate 32. The cover plate 32 is detachably connected to the box body 31 by screws, and a sealing strip is provided between the cover plate 32 and the box body 31 to achieve the sealing of the cavity of the regulating box 3 and avoid affecting the airflow in the screening chamber.

[0028] An air supply window 4 is provided on the left side of the grain channel 1. The air supply window 4 includes multiple air supply holes 41 and is located below the regulating box 3. After the fan is turned on, air can be introduced from the air supply holes 41.

[0029] Air supply adjustment components are provided at the four air supply windows. The air supply adjustment components include support rods 53 and baffle plates 51. There are two support rods 53. Support bars 52 are provided on the outside of the grain channel 1. The support bars 52 are set horizontally. The bottom of the support rods 53 is fixed on the support bars 52. The support bars 52 have through holes that run vertically through the vertically, allowing the baffle plates 51 to pass through.

[0030] Slip rings are provided on both sides of the baffle plate 51 in the width direction. The slip rings protrude to the left (i.e., perpendicular to the baffle plate 51) and are sleeved on the support rod 53. A locking nut 54 is provided on the support rod 53 to support the slip rings. By adjusting the position of the locking nut 54, the supported height of the slip rings can be changed, thereby changing the position of the baffle plate 51. Changing the position of the baffle plate 51 in the vertical direction can block part of the air supply hole 41, thereby adjusting the air supply volume. This adjustment can be made according to the specific grain type, dryness / moisture content, and the parameters of the matching fan.

[0031] The settling chamber 2 includes an upper chamber and a lower chamber. The bottom of the upper chamber has a constricted structure, meaning the upper cavity is large, which facilitates the concentration and downward movement of impurities. Furthermore, a baffle plate 24 is provided in the upper chamber, located to the lower left of the air intake 21. The airflow is redirected at the baffle plate 24 to prevent impurities from flying directly towards the air intake 21. Impurities are carried by the airflow through the connecting port 23. After entering the settling chamber 2, the cross-sectional area suddenly increases, the airflow velocity decreases rapidly, and the light impurities settle to the bottom under the action of gravity.

[0032] At the outlet 22, a shut-off valve (not shown) is installed, which is existing technology. Its function is to intermittently discharge the collected light impurities while preventing outside air from being drawn into the negative pressure system, thus ensuring stable suction performance.

[0033] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A suction separator for grain screening, comprising a left-right air separation chamber and a settling chamber, with a connecting port between the air separation chamber and the settling chamber, an air suction pipe at the top of the settling chamber for connecting to a fan assembly, and a waste outlet at the bottom of the settling chamber, characterized in that: The air separation chamber includes a grain channel and a channel adjustment mechanism. The upper part of the grain channel is the feed inlet and the lower part is the discharge outlet. The channel adjustment mechanism includes an adjustment box located on the left side of the grain channel. The adjustment box is equipped with a hanging plate, and a guide plate is hinged to the bottom of the hanging plate. The guide plate is inclined and its end extends into the grain channel. The adjustment box is equipped with a tension spring, and the lower end of the tension spring is connected to the upper side of the guide plate.

2. The suction separator for grain screening according to claim 1, characterized in that: The grain channel has a slot on the left side for the guide plate to pass through. The outer side of the grain channel is provided with a first hanging ear above the slot, and the upper side of the guide plate is provided with a second hanging ear. The two ends of the tension spring are respectively connected to the first hanging ear and the second hanging ear.

3. The suction separator for grain screening according to claim 1, characterized in that: The adjustment box includes a rectangular box body and an outer cover plate. The cover plate is detachably connected to the box body, and a sealing strip is provided between the cover plate and the box body.

4. The suction separator for grain screening according to claim 3, characterized in that: The box body is provided with an adjusting pad, and the adjusting pad has an inclined threaded hole. An adjusting rod is installed in the threaded hole. The upper end of the adjusting rod is located in the box body and is used to selectively abut against the lower side of the guide plate. The lower end of the adjusting rod is located outside the box body.

5. The suction separator for grain screening according to claim 4, characterized in that: The upper end of the adjusting rod is provided with a rubber block.

6. The suction separator for grain screening according to claim 1, characterized in that: The grain channel has a makeup air window on the left side, which includes multiple makeup air holes and is located below the regulating box.

7. The suction separator for grain screening according to claim 6, characterized in that: The air supply window is equipped with an air supply adjustment component, which includes a support vertical rod and a baffle plate. There are two support vertical rods. Slip rings are provided on both sides of the baffle plate in the width direction. The slip rings are sleeved on the support vertical rods. Locking nuts are provided on the support vertical rods to support the slip rings.

8. The suction separator for grain screening according to claim 7, characterized in that: The outer side of the grain channel is provided with a support bar, and the bottom of the support rod is fixed to the support bar. The support bar has a through hole that runs vertically through the grain channel, through which the baffle plate passes.

9. The suction separator for grain screening according to claim 1, characterized in that: The air separation chamber is equipped with a partition that extends downward from the top of the grain channel. The partition divides the cavity of the air separation chamber into a grain channel arranged on the left and right and a dirt removal channel. The dirt removal channel is directly connected to the connecting port.

10. The suction separator for grain screening according to claim 1, characterized in that: The settling chamber includes an upper chamber and a lower chamber. The bottom of the upper chamber has a tapered structure. A baffle plate is provided in the upper chamber and is located to the lower left of the suction pipe.

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