Winnowing screen

Abstract

A feeding port is formed in the top of a vertical bin body, a discharging port is formed in the bottom of the vertical bin body, a supporting frame is arranged at the bottom of the vertical bin body, and moving wheels are arranged on the supporting frame. A fan is arranged on the side portion of the vertical bin body, a winnowing outlet is formed in the side opposite to the fan, a dust blocking frame is arranged outside the winnowing outlet, a dust blocking net is arranged on the periphery of the dust blocking frame, and an impurity outlet is formed in the bottom of the dust blocking net. By means of the structural arrangement, grains fall down from the top, are blocked by the multiple stages of blocking plates and fall down in a waterfall mode, in the falling process, impurities such as rice husks, chaff and beancurd skin are blown to the winnowing outlet through the draught fan, airflow can be blown to the outside through the dust blocking net, and the impurities flow out through the impurity outlet and are reserved in the dust blocking net. The winnowing screen is simple in structure, high in impurity removal efficiency, good in effect, capable of freely and flexibly moving and being used in cooperation with external grain conveying equipment, and is an ideal winnowing screen.

Description

Technical Field

[0001] The utility model relates to the technical field of material screening, and discloses a pneumatic sieve. Background Art

[0002] The utility model relates to the technical field of grain screening, and particularly relates to a pneumatic sieve.

[0003] Existing material sieves usually adopt a vibrating screening structure, which drives the material sieve to shake horizontally or vertically through a driving motor for screening, so as to realize the separation of fine-grained materials from standard grains.

[0004] However, the technical disadvantages of this design are as follows: the entire material screening site is an open design, and during the screening process of the material, dust is flying everywhere, and the surrounding environment of the equipment is poor; moreover, for example, when screening some grains with chaff, it is impossible to separate the chaff from the fine materials, resulting in incomplete separation; furthermore, when screening some bean products, it is impossible to remove impurities such as bean skins in the bean products.

[0005] In view of this structural design, as professionals in this industry and technology, it is necessary to change the equipment structure on the basis of the existing material sieve, and remove the chaff impurities in the material by setting up a material pneumatic separation device. Summary of the Invention

[0006] To overcome the deficiencies of the prior art, the utility model provides a pneumatic sieve, which removes light impurities in materials such as grains by setting the material to fall vertically and blowing vertically by a blower during the falling process.

[0007] To achieve the above technical purpose, the utility model adopts the following scheme: a pneumatic sieve is provided with a vertical bin body, an inlet is arranged at the top of the vertical bin body, an outlet is arranged at the bottom of the vertical bin body, a support frame is arranged at the bottom of the vertical bin body, and moving wheels are arranged on the support frame; a blower is arranged on the side of the vertical bin body, a pneumatic separation outlet is arranged on the side opposite to the blower, a dust blocking frame is arranged outside the pneumatic separation outlet, a dust blocking net is arranged around the dust blocking frame, and an impurity outlet is arranged at the bottom of the dust blocking net.

[0008] Support legs are arranged at the bottom of the vertical bin body, and moving wheels are arranged on the support legs, so that the flexible movement of the equipment can be realized through the moving wheels.

[0009] A plurality of blowers are vertically arranged at intervals on the side wall of the vertical bin body, and the air flow on one side of the pneumatic separation outlet is blown through the plurality of blowers.

[0010] A plurality of blocking plates are arranged inside the vertical bin body, and the plurality of blocking plates at least include one of a top blocking plate and a bottom blocking plate.

[0011] The top baffle is in a U-shaped setting. The top baffle includes a top plate and inclined diversion plates on both sides. Side baffles are provided at the bottom edges of each inclined diversion plate. Top diversion holes are provided on the top baffle. Side diversion holes are provided on the inclined diversion plates. Edge diversion holes are provided between the inclined diversion plates and the side baffles.

[0012] The bottom baffle is horizontally arranged, and a number of bottom diversion holes are provided on the bottom baffle.

[0013] The feed inlet is a tapered feed inlet, and the material receiving range at the feed end is enlarged through the tapered feed inlet.

[0014] The dust blocking rack is horizontally extended. The bottom surface of the dust blocking rack is inclined and a bottom sealing plate is provided at the bottom. An impurity outlet is connected to the edge of the bottom sealing plate.

[0015] The beneficial effects of the present utility model are as follows: Through the above design, a feed inlet is provided at the top of the vertical bin body, a discharge outlet is provided at the bottom of the vertical bin body, a support frame is provided at the bottom of the vertical bin body, and moving wheels are provided on the support frame. A blower is provided on the side of the vertical bin body, an air separation outlet is provided on the side opposite to the blower, a dust blocking rack is provided outside the air separation outlet, a dust blocking net is provided around the dust blocking rack, and an impurity outlet is provided at the bottom of the dust blocking net. Through the above structural settings, after the grains fall from the top and are blocked by multiple baffles, they fall in a waterfall shape. During the falling process, the blower blows impurities such as chaff, bran, and bean skins towards the air separation outlet, the air flow can blow outwards through the dust blocking net, and the impurities flow outwards through the impurity outlet and are retained in the dust blocking net. The structure of the present utility model is simple, the impurity removal efficiency is high, the effect is good, it can be moved flexibly at will and used in cooperation with external grain conveying equipment, and it is an ideal air separation sieve. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 It is a front view structural schematic diagram of the present utility model;

[0018] Figure 3 It is a side view structural schematic diagram of the present utility model;

[0019] Figure 4 It is a structural schematic diagram of the baffle setting;

[0020] In the attached drawings, 1 is a vertical bin body, 10 is a fan fixing hole, 11 is a tapered feed inlet, 12 is a discharge port, 13 is a pneumatic separation outlet, 2 is a support frame, 21 is a reinforcing rod, 22 is a moving wheel, 3 is an upper fan, 31 is a lower fan, 4 is a top baffle, 40 is an upper support rod, 41 is a top plate, 411 is a top diversion hole, 42 is an inclined diversion plate, 421 is a side diversion hole, 43 is an outer baffle, 431 is an outer side diversion hole, 44 is an inner baffle, 441 is an inner side diversion hole, 5 is a bottom baffle, 50 is a lower support rod, 51 is a bottom diversion hole, 6 is a dust-proof rack, 61 is a dust-proof rack cross bar, 62 is a dust-proof rack arc-shaped rod, 63 is an inclined support rod, 64 is a dust-proof net, 65 is a bottom sealing plate, and 66 is an impurity outlet. Detailed implementation mode

[0021] Referring to the attached drawings, the present utility model discloses a pneumatic separation sieve, and the specific structure of the pneumatic separation sieve is disclosed and shown in detail in this embodiment.

[0022] A pneumatic separation sieve is provided with a vertical bin body 1 having a square structure, and a feed inlet is provided at the top of the vertical bin body 1. In this embodiment, in order to improve the feeding efficiency, the feed inlet is a tapered feed inlet 11, and the cross-sectional area of its top is larger than that of the bottom, so as to expand the feeding range of the feeding end through the tapered feed inlet 11.

[0023] A discharge port 12 is provided at the center of the bottom of the vertical bin body 1. The discharge port 12 is provided with a taper, and the discharge port 12 with a taper structure can concentrate the discharge end in a smaller area, which is convenient for external connection. Support frames 2 are respectively provided at the four corners of the bottom of the vertical bin body 1, and moving wheels 22 are provided on the bottom surface of each support frame 2. In order to improve the assembly strength, a reinforcing rod 21 is provided between the support frame 2 and the vertical bin body 1. The provision of the moving wheels 22 enables the flexible movement of this equipment between the material conveyor belt or the bagging machine, making it more convenient to use.

[0024] Fan fixing holes 10 are provided on the side of the vertical bin body 1. In this embodiment, two fan fixing holes 10 are provided, which respectively fix the upper fan 3 and the lower fan 31. A pneumatic separation outlet 13 is provided on the side opposite to the upper fan 3 and the lower fan 31. A dust-proof rack is connected to the outside of the pneumatic separation outlet 13. The dust-proof rack is composed of a dust-proof rack cross bar 61, a dust-proof rack arc-shaped rod 62, an inclined support rod 63 and a bottom sealing plate 65. A dust-proof net 64 is wrapped around the dust-proof rack cross bar 61, the dust-proof rack arc-shaped rod 62 and the inclined support rod 63. An impurity outlet 66 is connected to the bottom of the dust-proof net 64. The bottom sealing plate 65 is inclined and has a plate-like structure, and the impurity material falling on the bottom sealing plate 65 can slide into the impurity outlet 66.

[0025] In this embodiment, an upper blower 3 and a lower blower 31 are arranged on the side of the vertical bin body 1. In order to achieve orderly dispersion of the grain during its fall, a top baffle 4 is specifically arranged above the upper blower 3, and a bottom baffle 5 is arranged between the upper blower 3 and the lower blower 31. When installing the upper blower 3 and the lower blower 31, it should be noted that the upper blower 3 and the lower blower 31 are installed at an upper and lower interval and blow towards the side of the air separation outlet 13.

[0026] The described top baffle 4 is supported by an upper support rod 40 and welded to the inner wall of the vertical bin body 1. The top baffle 4 is arranged in a U-shaped configuration. As Figure 4 shown, the top baffle 4 includes a top plate 41 and inclined diversion plates 42 on both sides. A number of top diversion holes 411 are horizontally arranged at intervals on the top plate 41. A number of side diversion holes 421 are arranged at intervals on the two inclined diversion plates 42. Side baffle plates 43 are vertically arranged on the left and right sides of the two inclined diversion plates 42 respectively. An edge diversion hole 431 is arranged between the inclined diversion plate 42 and the side baffle plate 43. After the grain enters the interior of the vertical bin body 1 from the external tapered feed inlet 11, the top material falls at intervals through a number of top diversion holes 411 horizontally arranged on the top plate 41. When the grain accumulates due to excessive amount, it is diverted to the left and right sides by the two inclined diversion plates 42. At the same time, the side diversion holes 421 arranged at intervals on the two inclined diversion plates 42 can divert the grain sliding down from the side to fall. Finally, the side baffle plates 43 block the grain from continuing to slide outwards, and at the same time, all the grain is diverted downwards through the outer side diversion holes 431.

[0027] Through the above structural arrangement, when the external instantaneously supplies grain into the tapered feed inlet 11, if the instant supply amount increases, in order to prevent the material from accumulating at this tapered feed inlet 11 or avoid a large amount of material falling instantaneously and affecting the air separation, the top baffle 4 can be used to achieve diversion, so that the falling grain falls in a dispersed manner, improving the air flow through rate, and blowing and separating light impurities such as chaff and bean skins in the grain by air flow.

[0028] Furthermore, the present utility model adopts double blowers for secondary air separation. A bottom baffle 5 is specifically arranged between the upper blower 3 and the lower blower 31. The bottom baffle 5 is horizontally arranged. Those skilled in the art can form the bottom baffle 5 by setting a flat plate structure, and the bottom baffle 5 is supported and erected in the vertical bin body 1 through a plurality of lower support rods 50. A number of bottom diversion holes 51 are vertically arranged on the bottom baffle 5. After the grain enters from the tapered feed inlet 11, it is first blocked and diverted by the top baffle 4, so that the grain is evenly distributed in the middle and on both sides, and then secondary diversion is achieved through the bottom baffle 5. This can promote the screening effect and screening efficiency of the grain material.

[0029] In summary, with the above structural settings of the present utility model, after the grains fall from the top and are blocked by multiple baffle plates, they fall in a waterfall shape. During the falling process, the blower blows impurities such as chaff, bran, and bean skins towards the air separation outlet, and the air flow can blow outwards through the dust-proof net, and the impurities flow outwards through the impurity outlet. The present utility model has a simple structure, high impurity removal efficiency, good effect, can be moved freely and flexibly, and can be used in cooperation with external grain conveying equipment, and is an ideal air separation sieve.

Claims

1. A wind selection screen, characterized in that: It includes a vertical silo body, a feed port is arranged at the top of the vertical silo body, a discharge port is arranged at the bottom of the vertical silo body, a support frame is arranged at the bottom of the vertical silo body, and a moving wheel is arranged on the support frame; a fan is arranged on the side of the vertical silo body, and a wind selection outlet is arranged on the side opposite to the fan, a dust blocking frame is arranged outside the wind selection outlet, a dust blocking net is arranged on the periphery of the dust blocking frame, and an impurity outlet is arranged at the bottom of the dust blocking net.

2. A winnowing screen according to claim 1, characterized in that: The bottom of the vertical warehouse body is provided with supporting legs, and the supporting legs are provided with moving wheels.

3. The winnowing screen according to claim 1, characterized in that: A plurality of fans are vertically spaced apart on the side wall of the vertical bin body, and the airflow on one side of the air selection outlet is blown by the plurality of fans.

4. The winnowing screen according to claim 1, characterized in that: A multi-stage blocking plate is arranged inside the vertical warehouse body, and the multi-stage blocking plate includes at least one of a top blocking plate and a bottom blocking plate.

5. A winnowing screen according to claim 4, characterized in that: The top baffle plate is arranged in a "J" shape, and includes a top plate and inclined guide plates on both sides, and a side baffle plate is arranged at the bottom edge of each inclined guide plate; a top guide hole is arranged on the top baffle plate; a side guide hole is arranged on the inclined guide plate; and an edge guide hole is arranged between the inclined guide plate and the side baffle plate.

6. A winnowing screen according to claim 4, characterized in that: The bottom blocking plate is arranged horizontally, and a plurality of bottom flow guide holes are arranged on the bottom blocking plate.

7. The winnowing screen according to claim 1, characterized in that: The dust blocking frame is horizontally extended, the bottom surface of the dust blocking frame is inclined and a bottom sealing plate is arranged at the bottom, and the edge of the bottom sealing plate is connected to the impurity outlet.

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