CN203565371U

CN203565371U - Winnowing dust removal device for grain cleaner

Info

Publication number: CN203565371U
Application number: CN201320636293.3U
Authority: CN
Inventors: 杨建华
Original assignee: Xi'an Segotep Corn Product Co Ltd
Current assignee: Xi'an Segotep Corn Product Co Ltd
Priority date: 2013-10-15
Filing date: 2013-10-15
Publication date: 2014-04-30
Anticipated expiration: 2023-10-15

Abstract

The utility model discloses a winnowing dust removal device for a grain cleaner. The winnowing dust removal device comprises a feed hopper, a receiving hopper and a negative pressure air pipe. The receiving hopper is provided with an inclined hopper wall, the outlet of the feed hopper faces the upper edge of the inclined hopper wall, grain particles flowing out from the feed hopper flows downwards along the inclined hopper wall, an air inlet is formed in the middle of the inclined hopper wall, and the negative pressure air pipe is vertically arranged at the position, facing the air inlet, above the inclined hopper wall. According to the winnowing dust removal device for the grain cleaner, rolling of the grain particles is achieved by fully utilizing the mixing effect of negative pressure suction force and the grain gravity. The winnowing dust removal device for the grain cleaner has the advantages that the dust removal effect is good, the work efficiency is high and the needed negative pressure is small, and the pollution to the ambient environment is reduced.

Description

The dust removal of pneumatic separation device of grain cleaner

Technical field

The utility model relates to grain processing field, especially a kind of dust removal of pneumatic separation device of grain cleaner.

Background technology

The cereal crops such as wheat, corn, cereal are before warehouse entry storage, need to clean grain, conventionally in grain, contain that to be greater than the stone, stalk etc. of grain large assorted, and it is little assorted to be less than the rubble of grain, broken grain etc., but also have in addition dust and with lighter organic assorted or gently assorted of the basically identical weight of grain size, such as mouldy grain, the grain of damaging by worms etc.By cleaner, above-mentioned impurity is removed from raw material, obtained clean grain finished product, facilitate following process, the hidden danger such as in the time of also can preventing from storing, grain be inflammable, grain goes mouldy, damage by worms.

The Chinese utility model patent " novel cylindrical grain cleaner " that disclosed application number in 2002 is 02232451.8, introduced a kind of dressing machine based on circular screen drum rolling screening, comprise interior screen drum, middle screen drum and outer screen drum, three screen drums are low early and high after in aggregates on screen drum frame with an inclination angle arranged in co-axial alignment, the rear end of inclination screen drum relies on outer screen drum to be fixed on backing roll, front end drives screen drum axle to rotate by transmission mechanism, realizes the unitary rotation of screen drum.At drum sieve, clean in grain process, on the circumference of different screen drums, be evenly equipped with the mesh of different scale, thereby realize the cleaning of the impurity of different size size, grain is entered by interior screen drum, and then is flowed out by outer screen drum, grain phase mutual friction under the rolling effect of cylinder, the dust of grain surface adhesion is dropped in rolling, and by the little assorted outlet of outer screen drum outer setting, discharged together with other little mixing, large mixing separated by inner core, and the impurity outlet being arranged by screen drum front end is discharged.

The problem that this mode of cleaning exists is to have adopted single screen drum to clean mode, thorough not to eliminating of dust, and in addition little mixing is directly disposed in air with dust, easily causes airborne dust, causes environmental pollution.In follow-up improvement technology, also the compound mode of cleaning that has other equipment to adopt screen drum to combine with selection by winnowing, such as in the process of grain vertical drop, add horizontal negative pressure wind to carry out dedusting, but because selection by winnowing mode designs unreasonable, cause dust removing effects all bad, and easily cause larger environmental pollution.

Summary of the invention

The utility model proposes a kind of dust removal of pneumatic separation device of grain cleaner, there is the features such as grain cleaning efficiency grain high, that clean gained is clean, airborne dust is few, environmental protection.

Concrete scheme of the present utility model is:

A kind of dust removal of pneumatic separation device of grain cleaner, comprise feed hopper, receiving hopper and negative-pressure air duct, receiving hopper contains an inclination headwall, the outlet of feed hopper is just to edge on described inclination headwall, the grain that feed hopper flows out flows downward along described inclination headwall, middle part at inclination headwall has air inlet, and described negative-pressure air duct is vertically set on the just position to air inlet, inclination headwall top.

In the dust removal of pneumatic separation device of above-mentioned grain cleaner, the outlet of feed hopper is flat, and grain is routed on the inclination headwall of receiving hopper in the mode of thin layer.

In the dust removal of pneumatic separation device of above-mentioned grain cleaner, air inlet is some the apertures that cloth becomes face battle array, and the yardstick of aperture is less than grain.

In the dust removal of pneumatic separation device of above-mentioned grain cleaner, the inclined-plane of inclination headwall and horizontal direction angle are 45 °-75 °.

In the dust removal of pneumatic separation device of above-mentioned grain cleaner, the inclined-plane of inclination headwall and the angle of horizontal direction are 60 °.

The useful technique effect the utlity model has is as follows:

Negative pressure dust removal of pneumatic separation device of the present utility model takes full advantage of the immixture of negative-pressure sucking and grain gravity, cause the rolling of grain, there is the features such as high, the required negative-pressure sucking of good dedusting effect, operating efficiency is little, reduce the pollution to surrounding environment and the harm to staff's health, there is the feature of environmental protection.

Accompanying drawing explanation:

Fig. 1 is traditional dust removal of pneumatic separation principle schematic;

Fig. 2 is efficient dust removal of pneumatic separation principle schematic of the present utility model;

Fig. 3 is the compound grain cleaner operation principle of the utility model environment-friendly type schematic diagram;

Reference numeral is as follows:

1-feed hopper; 2-grain; 3-negative-pressure air duct; 4-receiving hopper; 5-air inlet; 6-air-flow; 11-interior screen drum; 12-outer screen drum; 13-discharge bucket; 14-little assorted collecting box; 15-discharge auger; 16-2# negative-pressure air duct; 17-blower; 18-deep bead; 19-3# exhaust duct; 20-negative pressure house steward; 32-front support stand; The rotating shaft of 33-screen drum.

The specific embodiment

Traditional dust removal of pneumatic separation all adopts grain Vertical Free to fall, the dedusting mouth of pneumatic separator is just to the grain falling, as shown in Figure 1, grain 2 free-fallings in feed hopper 1, in the direction falling perpendicular to grain, be provided with negative-pressure air duct 3, the dust in grain is siphoned away, at feed hopper 1, just the position of negative-pressure air duct is provided with to air inlet 5.This method is because the barrier effect in grain whereabouts causes dust cleaning not thorough.

Dust removal of pneumatic separation device of the present invention is as shown in Figure 2: the outlet of feed hopper 1 is flat, grain 2 is routed in the mode of thin layer on the inclination headwall of receiving hopper 4, in the centre of inclination headwall, be provided with air inlet 5, directly over air inlet 5, be provided with negative-pressure air duct 3, the grain 2 first below of negative-pressure air duct 3 has become uniform thin layer and has arranged, under the effect of negative-pressure sucking and grain gravity, can on inclination headwall, form eddy current, and cause the rolling of thin layer grain, can reach like this effect of clean dust, simultaneously due to suction function, a part of dust in feed hopper 1, will be with air-flow inspiration negative-pressure air duct 3, therefore can be at very little wind-force in the situation that, realize clean dedusting, and dust is all siphoned away to dust collecting installation by negative-pressure air duct 3, reduced the pollution to environment.

As shown in Figure 2, air inlet is some the apertures that cloth becomes face battle array, and wherein the yardstick of aperture is less than grain, and the inclined-plane of inclination headwall and horizontal direction angle are 45 °-75 °, and preferably angle is 60 °.

As shown in Figure 3, the utility model is applied in compound grain cleaner, below screening unit and the dust removal of pneumatic separation unit of the compound grain cleaner of article.

Screening unit comprises the double-deck screen drum or the multilayer screen drum that around central shaft, rotate, comprises interior screen drum 11 and outer screen drum 12, and the mesh of interior screen drum 11 is greater than the size of grain 2, is mainly used in removing large the mixing being greater than in grain 2, such as stalk, stone etc.; The mesh of outer screen drum 12 is less than the size of grain, is mainly used in removing being less than the little assorted of grain, such as rubble, grain chip etc.Interior screen drum 11 and outer screen drum 12 coaxially arrange, and low early and high after with an inclination angle arranged in co-axial alignment on screen drum frame, the rear end of inclination screen drum is fixed on rotating backing roll, front end drives screen drum rotating shaft 33 by transmission mechanism, realize the high speed rotating of screen drum, and then reach the cleaning to the large small impurities of different size, large assorted outlet and product outlet large assorted and that grain is arranged by screen drum front end respectively that cleaning obtains enter in corresponding gathering-device, the little assorted little assorted collecting box that outer screen drum 12 bottoms arrange that enters.Large mixing discharged with the little assorted wind discharge auger that closes by correspondence.

For simplicity, this description does not provide the concrete mechanism part of above-mentioned common practise, the block diagram such as interior screen drum 11 and outer screen drum 12 have just been drawn, the Chinese utility model patent " novel cylindrical grain cleaner " that concrete structure can be 02232451.8 referring to application number.

When containing impurity grain, first enter after interior screen drum 11, under the rotation of screen drum, large assorted staying in interior screen drum 11, and in inclination angle enters the large assorted collecting box of screen drum front end setting, in remaining grain and the little assorted outer screen drum 12 entering by the mesh of interior screen drum 11, it is medium and small assorted in the mesh of outer screen drum 12 has entered little assorted collecting box 14, and grain 2 has entered grain discharge bucket 13 along the inclination angle of outer screen drum 12.Little assorted collecting box 14 is connected with wind closing type discharge auger 15, can avoid like this environmental pollution causing in little assorted discharge.

Dust removal of pneumatic separation unit arranges respectively the inlet and outlet of screening unit, as shown in Figure 3, be mixed with large assorted, little assorted, the pending grain 2 of dust is transported to feed hopper 1 by conveyer belt, after the flat outlet of feed hopper 1, be laid on the inclination headwall of receiving hopper 4, at the middle part of inclination headwall, be provided with air inlet 5, directly over air inlet 5, be provided with 1# negative-pressure air duct 3, grain 2 is under the effect of negative-pressure sucking and grain gravity, can form eddy current, and cause the rolling of thin layer grain, drive dust roll and be inhaled in 1# negative-pressure air duct 3, the grain of having removed dust enters in interior screen drum 11 and carries out size selection.

Equally outside on the grain discharge bucket 13 of screen drum 12, also be provided with dust removal of pneumatic separation unit, its principle is consistent with the principle of import, discharge bucket 13 contains an inclination headwall, the grain of exporting through outer screen drum 12 is laid in thin layer on the sloped sidewall of discharge bucket 13, middle part at inclination headwall has air inlet, and negative-pressure air duct 16 is vertically set on the just position to air inlet, inclination headwall top.

At the outlet of screen drum and entrance, dust removal of pneumatic separation unit is set respectively and has further increased dust removing effects, and work by negative pressure, dust is siphoned away, can greatly reduce the pollution to environment, reduce labor strength, simultaneously pneumatic separation device of the present utility model takes full advantage of the immixture of negative-pressure sucking and grain gravity, little to the requirement of wind-force, and good dedusting effect, operating efficiency are high.

Claims

1. the dust removal of pneumatic separation device of a grain cleaner, comprise feed hopper (1), receiving hopper (4) and negative-pressure air duct (3), it is characterized in that: described receiving hopper (4) contains an inclination headwall, the outlet of feed hopper (1) is just to edge on described inclination headwall, the grain that feed hopper (1) flows out flows downward along described inclination headwall, at the middle part of inclination headwall, have air inlet (5), described negative-pressure air duct (3) is vertically set on the just position to air inlet (5), inclination headwall top.

2. the dust removal of pneumatic separation device of grain cleaner according to claim 1, is characterized in that: the outlet of described feed hopper (1) is flat, and grain is routed on the inclination headwall of receiving hopper (4) in the mode of thin layer.

3. the dust removal of pneumatic separation device of grain cleaner according to claim 1, is characterized in that: described air inlet (5) becomes some apertures of face battle array for cloth, and the yardstick of aperture is less than grain.

4. the dust removal of pneumatic separation device of grain cleaner according to claim 1, is characterized in that: the inclined-plane of described inclination headwall and horizontal direction angle are 45 °-75 °.

5. the dust removal of pneumatic separation device of grain cleaner according to claim 4, is characterized in that: the inclined-plane of described inclination headwall and the angle of horizontal direction are 60 °.