CN2385517Y

CN2385517Y - Cleaning and sorting device for rice-wheat thresher

Info

Publication number: CN2385517Y
Application number: CN 99229131
Authority: CN
Inventors: 吴步云
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-09
Filing date: 1999-08-09
Publication date: 2000-07-05
Anticipated expiration: 2009-08-09

Abstract

The utility model relates to a cleaning and sorting device for rice-wheat thresher; a screw feeder with star-tooth-shaped blades is arranged at the lower part of a thresher cylinder; a corrugation mesh screen is positioned at the lower part of the screw feeder; the position of the mesh screen is connected with an air duct; the position of an outlet of the air duct is provided with a suction blower; a steel plate hanging spring, and a vibration screen provided with an eccentric wheel and supported by an arc steel plate spring are arranged at the lower part of the mesh screen. The utility model can effectively clean and sort to rice, wheat, grains and glumes; the utility model has the advantages of small size, high separation degree and good cleaning and sorting effect, which is an ideal leaning and sorting device for the rice-wheat threshers.

Description

The rice-wheat thresher cleaning plant

The utility model belongs to agricultural machinery, is specifically related to a kind of structure of thresher separating cleaning device.

Development along with agricultural production; the peasant is more and more higher to the requirement of threshing separating cleaning; but the separating mechanism great majority of (comprising combine) adopt vibratory sieve to add the centrifugal fan composition on the thresher at present; vibratory sieve mechanism complex structure; the bodily form is big; because move back and forth, machine vibration is big, fault is many.This device is the improvement to the dual-purpose spiral threshing board of former patent (94226844 *) rice wheat thresher paddy grain husk separating mechanism.

The purpose of this utility model is: design a kind of thresher cleaning plant, star profile of tooth blade screw feeder and ripple net are formed bolter and are replaced vibratory sieve, add blower fan and oscillating riddle and constitute complete cleaner-separator structure, improve thresher separating cleaning degree.

The purpose of this utility model is achieved in that the screw feeder at the bottom of thresher drum design one band star profile of tooth blade; the ripple mesh screen is positioned at the bottom of screw feeder; the mesh screen bottom connects the air channel; wind passage mouth has induced-draught fan; one oscillating riddle is arranged below the ripple mesh screen; for effect is cleaned in raising; the star dentate leaf is to subtract narrow along screw conveyor shaft gradually to the facewidth; breach increases; the helical pitch trend that diminishes has gradually designed time seed slide plate in the air channel; back seed slide plate and following shrouding, and in the air channel, designed air channel triangular in shape, a cross section and divided guidance tape; oscillating riddle hangs spring by steel plate and semielliptic spring supports; swing frame is arranged on the oscillating riddle, and its endoporus is a rectangle, and eccentric wheel is positioned at the hole; and only with the oblong aperture contact both sides of frame, make the parallel swing of sieve.

Fig. 1 is the utility model structural representation

Fig. 2 is the utility model star profile of tooth blade screw feeder and oscillating riddle structural representation

Among the figure: guidance tape, 5 times shroudings, 6 oscillating riddles, 7 star profile of tooth blade screw feeders, 8 ripple mesh screens are divided in 1 induced-draught fan, 2 times seed slide plates, 3 back seed slide plates, 4 air channels, and seed slide plates, 10 feeding mouths, 11 concave grates, 12 threshing cylinders, 13 grass outlets, 14 steel plates hang spring, 15 screw conveyor shafts, 16 slide plates, 17 arc steel plates and hang spring, 18 eccentric wheels, 19 servo-actuated covers, 20 swing frames, 21 blade breach, 22 star profile of tooth screw feeder blades, 23 frames, 24 air channels before 9

Further introduce the utility model implementation method and operation principle below in conjunction with accompanying drawing:

The screw feeder 7 that one band star profile of tooth blade is arranged in the bottom of threshing cylinder 12; ripple mesh screen 8 be positioned at screw feeder 7 below; mesh screen 8 connects air channel 24; wind passage mouth has induced-draught fan 1; below ripple mesh screen 8, also has oscillating riddle 6; star profile of tooth blade 22 subtracts narrow along the screw conveyor shaft 15 axial facewidth gradually; blade breach 21 increases; the trend that helical pitch diminishes gradually; there is following seed slide plate 2 in air channel 24; back seed slide plate 3 reaches shrouding 5 down; the middle and lower part, air channel also has air channel triangular in shape, a cross section to divide guidance tape 4; oscillating riddle 6 hangs spring 14 by steel plate and semielliptic spring 17 supports, and swing frame 20 is arranged on the oscillating riddle 6, and its endoporus is a rectangle; eccentric wheel 18 is positioned at the hole of swing frame 20, and contacts with the oblong aperture both sides are moving.

By star profile of tooth blade screw feeder 7; ripple mesh screen 8; first separation mechanism is formed (by following seed slide plate 2 in centrifugal induced-draught fan 1 and air channel 24; back seed slide plate 3; guidance tape 4 is divided in the air channel; following shrouding 5 constitutes the air channel); the rice wheat stalk is entered by spout 10; rice wheat head head is through threshing cylinder 12 threshings; the tangerine bar is discharged from grass outlet 13; grain; the short cane of grain husk shell and part; the fringe head is by concave grate 11; preceding seed slide plate 9 falls; stir through star profile of tooth blade screw feeder 7; grain and the little cane of clever shell drop to the air channel district by ripple mesh screen 8; during blower fan 1 high speed rotating; form very strong negative pressure, make air flow pass through air channel III; upper air duct I; lower air duct II enters blower fan, has different flotation velocity owing to drop to the emersion object in air channel district; the grain husk shell; little cane is promptly taken away by air-flow; outside blower fan discharge machine, grain fall to reclaim, the full cereal of part that is siphoned away by upper air duct I; when arriving IV district, air channel; wind speed decreased, this grain drop to down again on the seed slide plate 2, fall to reclaiming through lower air duct II.The first-class impurity of short cane, fringe that falls through concave grate 11 if can not pass through ripple mesh screen 8 promptly by star profile of tooth blade screw feeder outside an end discharge machine of its screw conveyor shaft 15.Attached separation (secondary separation mechanism) is made up of screw conveyor shaft 15, eccentric wheel 18, servo-actuated cover 19, swing frame 20, oscillating riddle 6, slide plate 16, leaf spring 14,17 etc., discharge by star profile of tooth blade screw feeder in the short cane, fringe head of body and also may be entrained with a spot of grain and clever shell, this part effluent is put on the oscillating riddle 6, swing through oscillating riddle 6, grain, clever shell drop on the slide plate 16 by mesh, enter again in the wind III district, body road, the grain husk shell is by the blower fan sucking-off, grain falls to reclaiming, the impurity of staying on the compass screen surface is discharged, and realizes separating at last.

The utility model has following advantage and effect:

1, screw feeder blade is split into some breach, causes radial clearance, screw feeder is rotated The time, grain, clever shell can be missed from indentation, there, fall through the ripple mesh screen again. Along with axially Pass, the blade breach increases gradually, and star profile of tooth width narrows down gradually, and the blade helical pitch is also pursued Decrescence little, grain is all leaked down from mesh, mainly be long and screw feeder can be discharged Cane, big fringe head are finished main grain centrifugation thereby reach.

2, oscillating riddle is established eccentric wheel realization at the screw feeder axle head.Sieve can only horizontal aspect swings and does not produce the vibration that reaches other directions up and down when eccentric wheel is rotated, an ad hoc swing frame, the swing frame endoporus is a rectangle, eccentric wheel only with the contact both sides of the oblong aperture of swing frame, add steel plate and hang spring and the vertical effect that reaches horizontal both direction of arc leaf spring, sieve can only be swung.

3, design main feature in air channel is: (1) air channel cross section is near more wide more apart from blower fan; (2) whole air channel district departs from the threshing cylinder vertical center line, near blower fan one side; (3) shrouding is made of garden camber line, tangent line and vertical line three parts down, and branch guidance tape of design is divided into I, II, four districts of III, IV in (4) air channel.

The utility model is simple in structure, and volume is little, and good separating effect, degree of cleaning are higher than other separating mechanisms, is the desirable dressing mechanism of rice-wheat thresher.

Claims

1, a kind of rice-wheat thresher cleaning plant; form by frame (23), threshing cylinder (12); it is characterized in that: bottom in threshing cylinder (12); one star profile of tooth blade screw feeder (7) is arranged; ripple mesh screen (8) is positioned at the bottom of screw feeder (7); mesh screen (8) locates to connect air channel (24), and there is induced-draught fan (1) in exit, air channel (24), and oscillating riddle (6) is positioned at the bottom of mesh screen (8).

2, a kind of rice-wheat thresher cleaning plant according to claim 1; it is characterized in that: have some blade breach (21) on the star profile of tooth blade (22) of screw feeder (7); the star dentate leaf is narrow for subtracting gradually along the axial facewidth of screw conveyor shaft (15), and breach increases, the structure that helical pitch reduces gradually.

3, a kind of rice-wheat thresher cleaning plant according to claim 1; it is characterized in that: oscillating riddle (6) hangs spring (14) by steel plate and arc leaf spring (17) supports; swing frame (20) is arranged on the oscillating riddle; its endoporus is a slot, eccentric wheel (18) be positioned at swing frame (20) hole and only with the oblong aperture contact both sides of frame.

4, a kind of rice-wheat thresher cleaning plant according to claim 1; it is characterized in that: by guidance tape (4) is divided in seed slide plate (2), back seed slide plate (3), air channel down, shrouding (5) constitutes down, the air channel divides guidance tape (4) cross section triangular in shape being positioned in the middle of the air channel air channel (24).