Compact structure concentrator

Abstract

The present invention provides a compact concentrator with a more compact structure and lower manufacturing cost, and relates to grain sorting equipment. The compact concentrator comprises a frame and a hopper, a vibrating screen, a vibrating device and a specific gravity fan installed on the frame. The vibrating device is connected to the vibrating screen to drive the vibrating screen to vibrate. The vibrating screen comprises a screen box, and the screen box is provided with a large impurity screen plate, a material flow structure, a small impurity screen plate and a specific gravity concentrator from top to bottom. The concentrator of the present invention has a lower manufacturing cost and is more convenient in terms of placement and transportation.

Description

Technical Field

[0001] The invention relates to grain sorting equipment, in particular to a compact grain sorting machine. Background Art

[0002] With the development of modern agriculture and the transfer of rural land, agricultural mechanization has become more and more common, and grain cleaning equipment has become one of the necessary equipment for every farmer. Since my country is mainly based on small-scale peasant economy, farmers pay great attention to the convenience of placement and transportation of screening equipment when purchasing grain cleaning equipment. The current grain cleaning equipment on the market has an unreasonable structure and occupies a large area, which makes it inconvenient in placement and transportation.

[0003] Patent CN205887412U discloses a compact screening machine, which includes a frame, a hopper, a first screen body, an air separation and dust removal device, a second screen body, a specific gravity selection table, a specific gravity table fan and a vibration device. The screening machine mainly sets the first screen body and the second screen body above the specific gravity selection table, and the screen box will not exceed the two sides of the specific gravity selection table. Under the premise of ensuring the screening range of the screen box, the structure of the whole machine can be compact and the floor space can be reduced. Since the air separation and dust removal device of the screening machine is set above the first screen body, that is, the air separation and dust removal device of the screening machine needs to be set separately, it is bound to occupy a certain space, so the structure of the screening machine is not compact enough, and the manufacturing cost is also high. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a compact concentrator with a more compact structure and lower manufacturing cost.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a compact concentrator, comprising a frame and a hopper, a vibrating screen, a vibrating device and a specific gravity fan installed on the frame, wherein the vibrating device is connected to the vibrating screen to drive the vibrating screen to vibrate, and the vibrating screen comprises a screen box, wherein the screen box is provided with a large impurity screen plate, a material flow structure, a small impurity screen plate and a specific gravity concentrator in sequence from top to bottom;

[0006] The large impurity screen plate is arranged below the hopper, the cavity above the small impurity screen plate forms a light impurity air selection channel, the specific gravity selection platform is arranged obliquely, and the cavity above the specific gravity selection platform forms a specific gravity screening channel; the higher end of the specific gravity screening channel is connected to the stone outlet, and the lower end is connected to the second grain outlet; one end of the light impurity air selection channel is connected to the specific gravity screening channel through the air guide structure, and the other end is connected to the light impurity outlet;

[0007] The specific gravity fan is arranged below the specific gravity selection table.

[0008] Furthermore, the small impurity screening plate is tilted and the tilting direction is the same as the tilting direction of the specific gravity screening table, and the lower end of the light impurity air selection channel is connected to the specific gravity screening channel.

[0009] Furthermore, the flow structure includes a main flow plate and an auxiliary flow plate respectively arranged at both ends of the large impurity screen plate, and the main flow plate and the auxiliary flow plate are arranged in an eight-shaped shape, thereby forming a first grain outlet whose extension direction is perpendicular to the extension direction of the light impurity air selection channel.

[0010] Furthermore, the grain outlet end of the main flow plate is lower than the grain outlet end of the auxiliary flow plate and extends outwards.

[0011] Furthermore, the specific gravity screening channel has a top plate with one end connected to the grain outlet end of the main flow plate, the top plate is inclined toward the air inlet of the light impurity air selection channel, and the air guide structure includes the top plate.

[0012] Furthermore, the air guide structure also includes a plurality of air guide plates arranged in the specific gravity screening channel and inclined toward the air inlet of the light impurity air selection channel, the air guide surface of the air guide plate is an inwardly concave arc surface, and the air guide plates are arranged at intervals along the extension direction of the light impurity air selection channel.

[0013] Furthermore, the cross-sectional area of ​​the light impurity air selection channel at the impurity outlet end gradually decreases from the inside to the outside.

[0014] Furthermore, the small impurity sieve plate is a fish scale hole sieve plate, and the fish scale holes are arranged toward the light impurity outlet.

[0015] Furthermore, a stone outlet regulating baffle for adjusting the outlet opening is provided at the stone outlet.

[0016] Furthermore, the vibrating screen also includes a chute connected to the second grain outlet, and the chute is inlaid with a magnet.

[0017] The beneficial effects of the present invention are as follows: the large impurity screen plate, material flow structure, small impurity screen plate and specific gravity selection table of the selector of the present invention are arranged in the screen box from top to bottom in sequence, the light impurity air selection channel formed in the space above the small impurity screen plate is communicated with the specific gravity screening channel formed in the space above the specific gravity selection table, and the air flow generated by the specific gravity fan is reused through the air guide structure, so there is no need to set up a separate air selection and dust removal device, the selector has lower manufacturing cost and more compact structure, and the selector is more convenient in placement and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the vibrating screen of the present invention;

[0020] Figure 3 yes Figure 2 Sectional view along AA;

[0021] Figure 4 yes Figure 2 The enlarged schematic diagram of point B in the middle;

[0022] As shown in the figure: frame 1, hopper 2, vibrating screen 3, vibrating device 4, specific gravity fan 5, extension direction of light impurity air selection channel 6, screen box 31, light impurity air selection channel 33, specific gravity screening channel 34, second grain outlet 35, stone outlet 36, light impurity outlet 37, first grain outlet 38, air guide plate 39, large impurity outlet 40, uniform air plate 51, stone outlet adjustment baffle 361, large impurity screen plate 311, small impurity screen plate 312, specific gravity selection table 313, main flow plate 321, auxiliary flow plate 322, top plate 341, sifter 314, magnet 315, impurity outlet end 331 of light impurity air selection channel, air inlet 332 of light impurity air selection channel, and fish scale hole 3121. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 , Figure 2 As shown, the compact structure of the present invention is the same as the existing screening machine, including a frame 1 and a hopper 2, a vibrating screen 3, a vibrating device 4 and a specific gravity fan 5 installed on the frame 1. The vibrating device 4 includes a motor and a cam connecting rod mechanism. The motor is connected to the vibrating screen 3 through a cam connecting mechanism to drive the vibrating screen 3 to vibrate. In order to make the structure of the concentrator more compact, the vibrating screen 3 of the present concentrator includes a screen box 31, and the screen box 31 is provided with a large impurity screen plate 311, a material flow structure, a small impurity screen plate 312 and a specific gravity concentrating platform 313 from top to bottom. The large impurity screen plate 311, the material flow structure, the small impurity screen plate 312 and the specific gravity concentrating platform 313 can be arranged in the screen box 31 by welding, bolt connection, etc. The function of the material flow structure is to gather the grains that fall from the large impurity screen plate 311 so that they can enter the light impurity air selection channel 33 for air selection. The large impurity screen plate 311 is arranged below the hopper 2, the small impurity screen plate 312 and the wall plate of the screen box 31 form an upper cavity to form a light impurity air selection channel 33, the specific gravity selection platform 313 is arranged obliquely (compared to the horizontal plane), and the specific gravity selection platform 313 and the wall plate of the screen box 31 form an upper cavity to form a specific gravity screening channel 34; the higher end of the specific gravity screening channel 34 is connected to the stone outlet 36 arranged on the screen box 31, and the lower end is connected to the second grain outlet 35 arranged on the screen box 31, one end of the light impurity air selection channel 33 is connected to the specific gravity screening channel 34 through the air guide structure, and the other end is connected to the light impurity outlet 37 arranged on the screen box 31. The specific gravity fan 5 is arranged below the specific gravity selection platform 313.

[0025] The sieve holes of the gravity selection table 313 need to be smaller than the grain size, and the sieve holes of the large and small sieve plates 311 and 312 need to be larger than the grain size. The gravity selection table 313 and the large and small sieve plates 311 can be conventional ordinary sieve plates, and the figure shows existing fish scale sieve plates. According to the type of the gravity fan 5, the gravity fan 5 of the present invention is also provided with a serrated uniform wind plate 51 to ensure that the wind blows evenly to the gravity selection table 313. The wind guide structure can be a pipe.

[0026] Among them, the small impurity sieve plate 312 can be set horizontally, and the concentrator of the present invention preferably has the small impurity sieve plate 312 tilted, so that the light impurity air selection channel 33 is also tilted, and the lower end of the light impurity air selection channel 33 is connected to the specific gravity screening channel 34. In this way, part of the grain can pass through the sieve holes of the small impurity sieve plate 312 to enter the specific gravity screening channel 34, and part of the grain can enter the specific gravity screening channel 34 from the lower end of the small impurity sieve plate 312 (light impurity air selection channel 33), and the screening efficiency of the grain is high. The tilt direction of the small impurity sieve plate 312 is the same as the tilt direction of the specific gravity selection table 313 (the tilt angle may be different), which is convenient for sending impurities out.

[0027] When in use, grains enter the large impurity sieve plate 311 of the vibrating screen 3 from the hopper 2, and the large impurities with a volume larger than the grains in the grains are sieved out by the large impurities sieve plate 311. The large impurities remain on the large impurities sieve plate 311 and are discharged from the large impurities outlet 40. After the grains pass through the sieve holes of the large impurity sieve plate 311, they are gathered by the flow structure and fall into the light impurity air selection channel 33, and then enter the specific gravity screening channel 34 through the small impurity sieve plate 312. In this process, the airflow generated by the gravity fan 5 passes through the sieve holes of the gravity selection table 313, blows up the grains on the gravity selection table 313, and the grains flow out from the second grain outlet 35 under the action of gravity. The heavier stones are discharged from the stone outlet 36 under the vibration of the gravity selection table 313. A part of the airflow passing through the gravity selection table 313 enters the light impurity air selection channel 33 after being guided by the air guide structure, and flows out from the light impurity outlet 37 along the light impurity air selection channel 33, so as to use this part of the airflow to air-select the grains entering the light impurity air selection channel 33 to sort out the light impurities mixed in the grains. In this way, the selector does not need to set up a separate air selection dust removal device and auxiliary structure, the selector has a lower manufacturing cost and a more compact structure, and the selector is more convenient in terms of placement and transportation, which is particularly suitable for individual farmers in my country. The materials are screened three times in the whole process, and the screening effect of the selector is also good.

[0028] like Figure 2As shown, the flow structure includes a main flow plate 321 and an auxiliary flow plate 322 respectively arranged at both ends of the large impurity screen plate 311. The main flow plate 321 and the auxiliary flow plate 322 can be welded to the wall of the screen box 31. The main flow plate 321 and the auxiliary flow plate 322 are arranged in an eight-shaped shape, thereby forming a first grain outlet 38 whose extension direction is perpendicular to the extension direction 6 of the light impurity air selection channel. The extension direction 6 of the light impurity air selection channel refers to the connection end from the light impurity air selection channel 33 and the specific gravity screening channel 34 to the connection end of the light impurity air selection channel 33 and the light impurity outlet 37. The extension direction of the first grain outlet 38 is perpendicular to the extension direction 6 of the light impurity air selection channel. In this way, when the grains are gathered by the flow structure and enter the light impurity air selection channel 33 from the first grain outlet 38, a grain curtain with the largest windward surface will be formed, which is conducive to the airflow to sort out the light impurities in the grains.

[0029] The grain outlet end of the main flow plate 321 and the grain outlet end of the auxiliary flow plate 322 can be arranged flush with each other. Figure 2 In the embodiment, the grain outlet end of the main flow plate 321 is lower than the grain outlet end of the auxiliary flow plate 322 and extends outward, so that the first grain outlet 38 discharges along the wind direction in the light impurity air separation channel. This is not only conducive to the rapid separation of light impurities from impurity-containing grains under the action of gravity and wind, improving the air separation efficiency and avoiding the blockage of the first grain outlet 38, but also more conducive to the light impurities being discharged from the light impurity outlet 37 along with the air flow, avoiding the formation of turbulence in the light impurity air separation channel 33, affecting the air separation effect.

[0030] Figure 2 As shown, the specific gravity screening channel 34 has a top plate 341 connected to the grain outlet end of the main flow plate 321 at one end, and the top plate 34 is inclined toward the air inlet 332 of the light impurity air selection channel, and the top plate 341 constitutes an air guide structure, so that the lower end surface of the top plate 341 can be used to guide the air. The top plate 341 can be welded to the box wall of the screen box 31.

[0031] If the wind is guided only by the top plate 341, the wind flow will be mainly concentrated at the upper end of the wind selection channel 33, which will cause the problem of not being easy to select light impurities. Figure 2 In the specific gravity screening channel 34, a plurality of air guide plates 39 are arranged obliquely toward the air inlet 332 of the light impurity air selection channel. The air guide surface of the air guide plate 39 is an inwardly concave arc surface, and the air guide plates 39 are arranged at intervals along the extension direction of the light impurity air selection channel 33. The air guide surface of the air guide plate 39 is an inwardly concave arc surface, which can reduce the wind energy loss during the air guiding process. There are multiple air guide plates 39 and they are arranged at intervals along the extension direction 6 of the light impurity air selection channel. In this way, while increasing the air volume of the air selection, the air flow can be introduced into the light impurity air selection channel 33 in layers through the air guide plates and the top plate. In this way, the air flow in the air selection channel 33 is uniform, and the selection effect of the selection machine is better.

[0032] like Figure 3As shown, one end of the light impurity air separation channel 33 connected to the light impurity outlet 37 is the light impurity air separation channel impurity outlet end 331, and the cross-sectional area of ​​the light impurity air separation channel impurity outlet end 331 gradually decreases from the inside to the outside. In this way, the closer to the light impurity outlet 37 in the light impurity air separation channel 33, the greater the wind force. In this way, the slightly heavier impurities such as short stems and small weeds that are not screened out by the large impurity screen plate 311 during the vibration of the small impurity screen plate 312 are pushed toward the light impurity outlet 37 under the synergistic effect of the airflow and the small impurity screen plate 312. Because the closer to the light impurity outlet, the greater the wind force, these impurities can be separated and blown out, and the air separation effect of the selector is better. Similarly, in order to facilitate the discharge of heavier impurities such as stones screened out on the specific gravity screening table, the cross-sectional area of ​​the end connected to the stone outlet of the specific gravity screening table also gradually decreases from the inside to the outside. Among them, refer to Figure 4 The small impurity sieve plate 312 is a fish scale hole sieve plate, and its fish scale holes 3121 are arranged toward the light impurity outlet 37. Compared with the ordinary sieve plate, the fish scale hole sieve plate has a better vibration sorting effect and can guide the wind flow direction.

[0033] The stone outlet 36 is also provided with a stone outlet adjustment baffle 361 for adjusting the outlet opening. Specifically, the stone outlet adjustment baffle 361 is bolted to the screen box 31, and the bolt hole of the stone outlet adjustment baffle 361 is a bar hole. When the grain type, wind flow size, etc. change, the outlet opening size of the stone outlet 36 is adjusted by the stone outlet adjustment baffle 361 to prevent the air flow from blowing the grain out of the stone outlet 36.

[0034] like Figure 3 As shown, the vibrating screen 3 also includes a sifter 314 connected to the second grain outlet 35. The sieve holes of the sifter 314 are smaller than the grain diameter. The sifter can sort out a part of impurities in the grain that are smaller in volume than the grain but have a specific gravity equivalent to that of the grain. A magnet 315 is embedded on the sifter 314 to sort out iron impurities in the grain.

Claims

1. A compact concentrator, comprising a frame (1), a hopper (2) mounted on the frame (1), a vibrating screen (3), a vibrating device (4) and a specific gravity fan (5), wherein the vibrating device (4) is connected to the vibrating screen (3) to drive the vibrating screen (3) to vibrate, and characterized in that: The vibrating screen (3) comprises a screen box (31), wherein the screen box (31) is provided with a large miscellaneous screen plate (311), a material flow structure, a small miscellaneous screen plate (312) and a specific gravity selection table (313) in sequence from top to bottom; The large impurity sieve plate (311) is arranged below the hopper (2); the cavity above the small impurity sieve plate (312) forms a light impurity air selection channel (33); the specific gravity selection platform (313) is arranged obliquely; the cavity above the specific gravity selection platform (313) forms a specific gravity screening channel (34); the higher end of the specific gravity screening channel (34) is connected to the stone outlet (36), and the lower end is connected to the second grain outlet (35); one end of the light impurity air selection channel (33) is connected to the specific gravity screening channel (34) through an air guide structure, and the other end is connected to the light impurity outlet (37); The specific gravity fan (5) is arranged below the specific gravity selection table (313); The small impurity screening plate (312) is tilted and its tilting direction is the same as that of the specific gravity screening platform (313); the lower end of the light impurity air selection channel (33) is connected to the specific gravity screening channel (34); The material flow structure comprises a main material flow plate (321) and an auxiliary material flow plate (322) respectively arranged at two ends of the large impurity screen plate (311), wherein the main material flow plate (321) and the auxiliary material flow plate (322) are arranged in an eight-shaped shape, thereby forming a first grain outlet (38) extending in a direction perpendicular to the extension direction (6) of the light impurity air selection channel; The grain outlet end of the main flow plate (321) is lower than the grain outlet end of the auxiliary flow plate (322) and extends outwards; The specific gravity screening channel (34) has a top plate (341) whose one end is connected to the grain outlet end of the main flow plate (321), the top plate (341) is inclined toward the air inlet (332) of the light impurity air selection channel, and the air guide structure includes the top plate (341); The air guide structure further comprises a plurality of air guide plates (39) arranged in the specific gravity screening channel (34) and inclined toward the air inlet (332) of the light impurity air selection channel, the air guide surface of the air guide plates (39) being an inner concave arc surface, and the air guide plates (39) being arranged at intervals along the extension direction (6) of the light impurity air selection channel; The stone outlet (36) is also provided with a stone outlet adjustment baffle (361) for adjusting the outlet opening.

2. The compact concentrator according to claim 1, characterized in that: The cross-sectional area of ​​the light impurity air selection channel impurity outlet end (331) gradually decreases from the inside to the outside.

3. The compact concentrator according to claim 2, characterized in that: The small impurity sieve plate (312) is a fish scale hole sieve plate, and its fish scale holes (3121) are arranged toward the light impurity outlet (37).

4. The compact concentrator according to claim 1, characterized in that: The vibrating screen (3) further comprises a sifter (314) connected to the second grain outlet (35), and a magnet (315) is embedded on the sifter (314).

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