Negative pressure winnowing device

Abstract

The invention relates to a negative pressure winnowing device, which belongs to the technical field of seed screening, and comprises a negative pressure unit, a suction unit and a scraping unit, the negative pressure unit comprises a negative pressure device, a dust collecting barrel arranged on the negative pressure device, a connecting pipe arranged on the dust collecting barrel, a valve arranged on the connecting pipe and a communicating pipe arranged on the valve; the lower end of the communicating pipe is arranged in the first dust collection cylinder or the third dust collection cylinder in a protruding mode, when the suction force is large, airflow vortexes exist in the first dust collection cylinder or the third dust collection cylinder, light empty shells can be sucked into the communicating pipe, heavy seeds stay on the outer side of the communicating pipe, and therefore the seeds can be sucked into the first dust collection cylinder or the third dust collection cylinder. Direct suction can be avoided, wrong suction is reduced, and waste of seeds is avoided. And a convex pipe is arranged in the dust collection cylinder. The device is simple in structure, can be quickly disassembled, and can be selected according to use requirements.

Description

Technical Field

[0001] The invention relates to the technical field of seed screening, and in particular to a negative pressure air separation device. Background Art

[0002] Seed impurity removal and screening is an important process, the purpose of which is to improve the quality of seeds and ensure the yield and quality after planting. Impurities that may exist in seeds include: stones, dust, seed shells, straw, leaves, insects, mold, etc. These impurities may be mixed in during the collection, processing and storage of seeds, affecting the purity and quality of seeds; there are two main ways to remove impurities from seeds: air selection and screen screening. In existing technologies, grain cleaning vehicles all use vertical air selection devices for impurity suction.

[0003] Only a small amount of seeds need to be used in the experiment. However, the grain winnowing and impurity removal device in the prior art is only suitable for a large amount of seeds. Its structure is bulky and is not suitable for use in small places such as laboratories or a small amount of seeds. Summary of the invention

[0004] The purpose of the present invention is to address the problems existing in the background technology and to provide a negative pressure air separation device which has a simple structure, can be quickly disassembled, and can be selected according to usage needs.

[0005] The technical solution of the present invention is: a negative pressure air separation device, comprising: A negative pressure unit, comprising a negative pressure device, a dust collecting cylinder arranged on the negative pressure device, a connecting pipe arranged on the dust collecting cylinder, a valve arranged on the connecting pipe, and a connecting pipe arranged on the valve; A suction unit, disposed at the lower end of the connecting pipe and connected to the connecting pipe; The scraping unit is arranged at the lower end of the suction unit.

[0006] Preferably, when the suction unit is a suction assembly 1, it includes a dust suction cylinder 1 arranged at the lower end of the connecting pipe, and a dust suction cylinder 2 arranged at the lower part of the dust suction cylinder and having an open groove.

[0007] Preferably, when the suction unit is suction assembly three, it includes a dust suction cylinder one arranged at the lower end of the connecting pipe, and a dust suction cylinder two arranged on the dust suction cylinder one and having a flat lower portion.

[0008] Preferably, when the suction unit is suction assembly 2, it includes a dust suction cylinder 3 arranged at the lower end of the connecting pipe, a connecting portion arranged at the lower end of the dust suction cylinder 3, and an arc-shaped cylinder arranged at the lower part of the connecting portion.

[0009] Preferably, a plurality of spoiler components in a spiral arc-shaped structure that fit the inner wall of the arc-shaped cylinder are arranged in the arc-shaped cylinder.

[0010] Preferably, the scraping unit comprises a scraping plate having an inclined surface and arranged on the second dust collecting cylinder, and an arc-shaped block arranged on the scraping plate.

[0011] Preferably, the scraping unit further comprises a roller rotatably arranged on the arc block, the diameter of the roller is greater than the thickness of the arc block, and the lower end of the roller protrudes out of the dust collection cylinder 2.

[0012] Preferably, the lower end of the connecting pipe is protruding into the dust collection tube.

[0013] Preferably, a convex tube is provided in the dust collecting barrel; and the connecting tube is embedded in the convex tube.

[0014] Preferably, the negative pressure device, the dust collecting cylinder, the connecting pipe, the valve, and the connecting pipe are all detachably connected and have an interference fit.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: In the present invention, negative pressure is generated by a negative pressure device, and the negative pressure sucks away the air in the connecting pipe through the dust collecting tube. When the valve is opened, the air in the suction unit is sucked away, generating negative pressure, thereby allowing outside air to enter from the lower part of the suction unit. When entering, if it is close to the seeds, the lighter seeds, i.e., empty shells and impurities, can be sucked away, while the heavier seeds will remain in place, or after entering the suction unit, the suction force is less than the gravity, causing it to fall, thereby enabling wind separation and impurity removal operations.

[0016] The present invention has a compact structure and can be disassembled and assembled, and occupies a small space, so it can be conveniently carried and transported. The present invention is only suitable for small-batch screening and is not suitable for large-scale screening work. It is more suitable for seedling raising places such as laboratories. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 It is a structural explosion diagram of an embodiment of the present invention; Figure 3 It is a structural cross-sectional view of an embodiment of the present invention; Figure 4 It is a structural side view of an embodiment of the present invention; Figure 5 It is an exploded view of the local structure of an embodiment of the present invention; Figure 6 It is a schematic diagram of the local structure of an embodiment of the present invention.

[0019] Figure numerals: 1. Negative pressure unit; 101. Negative pressure device; 102. Dust collecting cylinder; 103. Connecting pipe; 104. Valve; 105. Connecting pipe; 1021. Convex pipe; 2. Suction component one; 201. Dust collecting cylinder one; 202. Dust collecting cylinder two; 2021. Opening groove; 3. Scraping unit; 301. Scraping plate; 302. Arc block; 303. Roller; 4. Suction component two; 401. Dust collecting cylinder three; 402. Connecting part; 403. Arc cylinder; 5. Turbine component. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0024] Embodiment 1 like Figure 1-6 As shown, a negative pressure air separation device proposed by the present invention includes a negative pressure unit 1, a suction unit, and a scraping unit 3; The negative pressure unit 1 includes a negative pressure device 101, a dust collecting cylinder 102 arranged on the negative pressure device 101, a connecting pipe 103 arranged on the dust collecting cylinder 102, a valve 104 arranged on the connecting pipe 103, and a connecting pipe 105 arranged on the valve 104; the lower end of the connecting pipe 105 protrudes into the dust collecting cylinder 201 or the dust collecting cylinder 3, 401, and the connecting pipe 105 protrudes into the dust collecting cylinder 201 or the dust collecting cylinder 3, 401, so that when the suction force is large, there is an air flow vortex, so that the lighter empty shells will be sucked into the connecting pipe 105, while the heavier seeds will stay on the outside of the connecting pipe 105, which can avoid being directly sucked in, reduce erroneous suction, and avoid wasting seeds. The dust collecting barrel 102 is provided with a convex pipe 1021. When the negative pressure device 101 stops working, the impurities entering the dust collecting barrel 102 will fall down, and the convex pipe 1021 can prevent the impurities from falling back into the suction unit, thereby preventing backflow. The flow rate of the negative pressure entering the suction component 1 2 or the suction component 2 4 can be controlled by the valve 104. The connecting pipe 103 is embedded in the convex pipe 1021. The suction unit is arranged at the lower end of the connecting pipe 105 and is connected to the connecting pipe 105. The scraping unit 3 is arranged at the lower end of the suction unit.

[0025] When the suction unit is a suction component 2, it includes a dust cylinder 201 arranged at the lower end of the connecting pipe 105, and a dust cylinder 202 arranged at the lower part of the dust cylinder 201 and having an open groove 2021; the dust cylinder 202 having the open groove 2021 at the lower part can ensure that after one side of the lower end of the dust cylinder 202 contacts the material tray, there is still a certain gap for seeds and air to enter, so that seeds can be more conveniently sucked without worrying about the lower end of the dust cylinder 202 being completely blocked.

[0026] When the suction unit is the suction component three, it includes the dust cylinder 1 201 arranged at the lower end of the connecting pipe 105, and the dust cylinder 2 202 arranged on the dust cylinder 1 201 and having a flat bottom. The flat dust cylinder 202 can provide relative sealing of the lower part of the dust cylinder 202. When sucking seeds with smaller particles or heavier mass, if the gap of the dust cylinder 202 is too large, the suction force will be affected, and the seeds cannot be quickly attached, resulting in the inability to quickly suck the seeds. The use of the flat dust cylinder 202 can freely adjust the gap between the lower end of the dust cylinder 202 and the material tray, without the current problem of insufficient airtightness, resulting in the inability to completely suck up the seeds.

[0027] The negative pressure device 101, the dust collecting tube 102, the connecting tube 103, the valve 104, and the connecting tube 105 can be detachably connected and have an interference fit. Through the interference fit and plug-in operation of the negative pressure device 101, the dust collecting tube 102, the connecting tube 103, the valve 104, and the connecting tube 105, they can be quickly disassembled and installed, and the interference fit can ensure the sealing. The negative pressure device 101, the dust collecting tube 102, the connecting tube 103, the valve 104, and the connecting tube 105 are all made of plastic and have a certain amount of elastic deformation, so they can be directly plugged and installed.

[0028] In this embodiment, negative pressure is generated by the negative pressure device 101, and the negative pressure sucks away the air in the connecting pipe 103 through the dust collecting tube 102. When the valve 104 is opened, the air in the suction unit is sucked away, generating negative pressure, so that the outside air enters from the lower part of the suction unit. When entering, if it is close to the seeds, the lighter seeds, i.e., empty shells and impurities, can be sucked away, while the heavier seeds will remain in place, or after entering the suction unit, the suction force is less than the gravity, causing it to fall, thereby enabling air separation and impurity removal operations.

[0029] The present invention has a compact structure and can be disassembled and assembled, and occupies a small space, so it can be conveniently carried and transported. The present invention is only suitable for small-batch screening and is not suitable for large-scale screening work. It is more suitable for seedling raising places such as laboratories.

[0030] Embodiment 2 like Figure 1-6 As shown, a negative pressure air separation device proposed by the present invention, compared with the first embodiment, the suction unit in this embodiment is a suction assembly 2 4, which includes a dust suction cylinder 3, 401 arranged at the lower end of the connecting pipe 105, a connecting portion 402 arranged at the lower end of the dust suction cylinder 3, 401, and an arc cylinder 403 arranged at the lower part of the connecting portion 402. A plurality of spoiler assemblies 5 in a spiral arc structure that fit the inner wall of the arc cylinder 403 are arranged in the arc cylinder 403.

[0031] In this embodiment, the negative pressure at the arc cylinder 403 can be reduced through the arc cylinder 403 with a spherical structure. After the seeds are sucked into the arc cylinder 403, due to the reduction of negative pressure, the seeds are affected by their gravity and automatically fall downward, and the spoiler component 5 can make the airflow rise in a spiral shape, so that the seeds can be relatively displaced in the arc cylinder 403, so that lighter seeds, i.e., empty shell seeds, can be quickly sucked into the connecting part 402, and then enter the negative pressure unit 1 through the dust suction cylinder three, 401 for collection. By adjusting the negative pressure, seeds with appropriate gravity can be screened, so that lighter seeds or impurities are directly sucked away, while heavier seeds cannot be sucked away, so that only seeds with moderate gravity can be stirred in the arc cylinder 403, so that the seeds can be screened.

[0032] Embodiment 3 like Figure 1-6 As shown, a negative pressure air separation device proposed by the present invention, compared with the first or second embodiment, the scraping unit 3 in this embodiment includes a scraping plate 301 with an inclined surface and arranged on the second dust suction cylinder 202, and an arc block 302 arranged on the scraping plate 301. The scraping unit 3 also includes a roller 303 rotatably arranged on the arc block 302, the diameter of the roller 303 is greater than the thickness of the arc block 302, and the lower end of the roller 303 protrudes from the second dust suction cylinder 202.

[0033] In this embodiment, the scraper plate 301 can push the seeds that are adhered or stuck in the material tray, so that the seeds can move. After the seeds move, they can be easily sucked into the suction component 1 2 or the suction component 2 4. The seeds are guided by the arc block 302, so that the seeds can easily enter the suction component 1 2 or the suction component 2 4, and the roller 303 can support the scraper plate 301, so that the scraper plate 301 supports the suction component 1 2 or the suction component 2 4, the minimum ground clearance can be controlled, and it can be easily moved to prevent jamming.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A negative pressure air separation device, characterized in that: include, A negative pressure unit (1), comprising a negative pressure device (101), a dust collecting cylinder (102) arranged on the negative pressure device (101), a connecting pipe (103) arranged on the dust collecting cylinder (102), a valve (104) arranged on the connecting pipe (103), and a connecting pipe (105) arranged on the valve (104); A suction unit, arranged at the lower end of the connecting pipe (105) and connected to the connecting pipe (105); The scraping unit (3) is arranged at the lower end of the suction unit.

2. A negative pressure air separation device according to claim 1, characterized in that: When the suction unit is suction assembly one (2), it comprises a dust suction cylinder one (201) arranged at the lower end of the connecting pipe (105), and a dust suction cylinder two (202) arranged at the lower part of the dust suction cylinder one (201) and having an open groove (2021).

3. A negative pressure air separation device according to claim 1, characterized in that: When the suction unit is suction assembly three, it comprises a dust suction cylinder one (201) arranged at the lower end of the connecting pipe (105), and a dust suction cylinder two (202) arranged on the dust suction cylinder one (201) and having a flat lower portion.

4. A negative pressure air separation device according to claim 1, characterized in that: When the suction unit is suction assembly two (4), it comprises a dust suction cylinder three (401) arranged at the lower end of the connecting pipe (105), a connecting portion (402) arranged at the lower end of the dust suction cylinder three (401), and an arc-shaped cylinder (403) arranged at the lower part of the connecting portion (402).

5. A negative pressure air separation device according to claim 4, characterized in that: The arc-shaped cylinder (403) is provided with a plurality of spoiler components (5) which are fitted to the inner wall of the arc-shaped cylinder (403) and have a spiral arc-shaped structure.

6. A negative pressure air separation device according to claim 2, characterized in that: The scraping unit (3) comprises a scraping plate (301) having an inclined surface and arranged on the second dust collecting cylinder (202), and an arc-shaped block (302) arranged on the scraping plate (301).

7. A negative pressure air separation device according to claim 6, characterized in that: The scraping unit (3) further comprises a roller (303) rotatably arranged on the arc block (302), the diameter of the roller (303) being greater than the thickness of the arc block (302), and the lower end of the roller (303) protruding from the second dust collecting cylinder (202).

8. A negative pressure air separation device according to claim 2, characterized in that: The lower end of the connecting pipe (105) is protruding into the first dust collecting cylinder (201).

9. A negative pressure air separation device according to claim 1, characterized in that: A convex tube (1021) is provided in the dust collecting cylinder (102); and the connecting tube (103) is embedded in the convex tube (1021).

10. The negative pressure air separation device according to claim 1, characterized in that: The negative pressure device (101), the dust collecting cylinder (102), the connecting pipe (103), the valve (104), and the connecting pipe (105) are all detachably connected and are interference-fitted.

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