CN210671326U - Double-cylinder screen cleaning device and longitudinal axial flow ratoon rice combine harvester thereof - Google Patents

Double-cylinder screen cleaning device and longitudinal axial flow ratoon rice combine harvester thereof Download PDF

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CN210671326U
CN210671326U CN201921203547.6U CN201921203547U CN210671326U CN 210671326 U CN210671326 U CN 210671326U CN 201921203547 U CN201921203547 U CN 201921203547U CN 210671326 U CN210671326 U CN 210671326U
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double
cleaning
sieve
sliding plate
fan
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李耀明
王晗昊
李佳圣
陈安娅
黄铭森
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Jiangsu University
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Jiangsu University
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Abstract

The utility model provides a double-cylinder sieve cleaning device and a longitudinal axial flow ratoon rice combine harvester thereof, which comprises a double-cylinder sieve and a double-outlet cleaning fan, wherein the lower air outlet of the double-outlet cleaning fan is positioned in front of the double-cylinder sieve and is used for being matched with the double-cylinder sieve to blow out large impurities; the upper air outlet of the double-outlet cleaning fan is positioned above the double-cylinder sieve and used for directly blowing the light and impurity residues discharged by the threshing device out of the machine. The grain sliding plate and the shaking plate divide the cleaning chamber into an upper cleaning area and a lower cleaning area, and the upper cleaning area is used for directly blowing the light and impurity residues discharged by the threshing device out of the machine; the lower cleaning area is used for blowing large impurities out of the machine. The utility model discloses the preliminary selection by winnowing is carried out in limited vertical space between make full use of thresher and the cleaning mechanism, can reduce the design power of drum sieve, and the rational utilization fan will be light and miscellaneous directly blow off outside, and need not be through the shedding of drum sieve.

Description

Double-cylinder screen cleaning device and longitudinal axial flow ratoon rice combine harvester thereof
Technical Field
The utility model relates to a harvester cleaning plant field or agricultural harvesting equipment field, in particular to two drum sieve cleaning plant and axis of ordinates stream ratooning rice combine thereof.
Background
The ratoon rice is a rice variety which is cultivated by using dormant buds surviving on rice stakes after harvesting to ensure that the rice is spilt and ripened again, compared with the traditional rice, the ratoon rice has a plurality of advantages, in recent years, the single yield of the rice reaches the bottleneck, and the planting of the ratoon rice can effectively improve the multiple cropping index and the rice yield. When first season rice is harvested, the crop is cauliflower green and has high water content; in order to ensure that the rice stumps can be used for heading again in the second season, the first harvest season of the ratoon rice has high agronomic requirements for stubble remaining; meanwhile, the rolling of the harvester on the cut rice piles is inevitable, and the loss should be reduced as much as possible.
Threshing devices are important working components of combine harvesters for separating fed crop kernels from their stalks. According to the arrangement characteristics of the threshing cylinders, the commonly used threshing device can be roughly divided into a transverse axial flow threshing device and a longitudinal axial flow threshing device, wherein the transverse axial flow threshing device is simple in structure, convenient to maintain and universal in accessories, but the harvesting varieties are single, and compared with the longitudinal axial flow threshing device, the longitudinal axial flow threshing device is large in threshing area and good in effect and is suitable for various crops.
The cleaning plant is an important component of the rice and wheat combine harvester, and the quality of the performance of the cleaning plant directly influences the operation effect of the whole machine. The fan vibrating screen type cleaning device is high in stability and adaptability, is widely used at present, but is large and complex in structure, high in power demand and large in vibration, and the cleaning efficiency is reduced and blockage is easy to occur when the moisture content of the threshed objects is high, so that the working requirement of the ratooning rice harvester cannot be completely met. The agronomic requirement of high stubble remaining during harvesting of the ratoon rice in the first season is that only the length of about 40cm below the head of the rice spike is harvested, compared with the harvest of the traditional rice, the water content of the rice thresher is high, the grain content is extremely high and can reach 80 to 90 percent, and the rest is the combination of light impurities and short stalks, so that the harvest of the ratoon rice is more suitable for using a cylinder screen cleaning mechanism compared with the harvest of the traditional rice under the appropriate feeding amount.
Compared with a vibrating screen cleaning device, the double-cylinder screen cleaning device has the advantages of simple structure, reliable work, light weight, small vibration, good moisture performance, good cleaning effect on materials with high grain content and low impurity content, and conforms to the characteristics of regenerated rice threshing products. However, due to its structural characteristics, the conventional cylinder screen cleaning mechanism is usually used in conjunction with a horizontal axial flow threshing cylinder, as shown in fig. 1, a cylinder screen is horizontally arranged in a casing, a cylinder screen shaft, a threshing cylinder shaft and a fan shaft are arranged in parallel, a front screen is positioned under the threshing cylinder, the threshed material firstly falls on the front cylinder screen, a rear cylinder screen only receives the material thrown by the front cylinder screen, under the coordination of the rotation of the front screen and the fan airflow, seeds with high suspension speed pass through the cylinder screen and fall into a grain conveying auger, light impurities with low suspension speed are blown out of the machine, and impurities such as stalk blades and the like are blown out of the casing by the airflow after being thrown by the rear cylinder screen. Therefore, the light impurities, the short stalks and the stalk blades need to be thrown out through the cylindrical screen, and the rated power of the cylindrical screen is increased; and the air port of the fan blows the light impurity, the short stalks and the stalk blades out of the casing from the bottom of the cylindrical screen, so that the utilization rate of the fan is not high.
Disclosure of Invention
To exist not enough among the prior art, the utility model provides a two drum sieve cleaning plant and axis of ordinates flow ratooning rice combine thereof, the preliminary selection by winnowing is carried out in limited vertical space between make full use of thresher and the cleaning mechanism, can reduce the design power of drum sieve, and the rational utilization fan will be light miscellaneous remaining direct blow off machine outside, and need not be through the shedding of drum sieve.
The utility model discloses a realize above-mentioned technical purpose through following technological means.
A cleaning device with double cylindrical sieves comprises the double cylindrical sieves and a cleaning fan with double outlets, wherein the lower air outlet of the cleaning fan with double outlets is positioned in front of the double cylindrical sieves and is used for being matched with the double cylindrical sieves to blow out large impurities out of the machine; the upper air outlet of the double-outlet cleaning fan is positioned above the double-cylinder sieve and is used for directly blowing the light and impurity residues discharged by the threshing device out of the machine.
Further, the lower air outlet of the double-outlet cleaning fan is divided into an upper air duct and a lower air duct by an air deflector; the upper air duct is used for blowing air flow to the upper part of the double-cylinder screen shaft, and the lower air duct is used for blowing air flow to the lower part of the double-cylinder screen shaft.
Further, the angle a of the air inlet of the double-outlet cleaning fan is not less than 120 degrees, and the angle b of the lower air outlet of the double-outlet cleaning fan is 120-140 degrees; the angle c of the upper air outlet of the double-outlet cleaning fan is 90-100 degrees.
Further, the double-cylinder screen comprises a front cylinder screen and a rear cylinder screen, and the diameter of the rear cylinder screen is 0.8-1 time of that of the front cylinder screen; the rotating speed of the rear cylindrical screen is not less than that of the front cylindrical screen.
Further, the double-cylinder screen adopts a fence type screen, and the gap between the screens is 10mm to 20 mm.
The threshing device further comprises a grain sliding plate and a shaking plate, wherein the grain sliding plate and the shaking plate divide the cleaning chamber into an upper cleaning area and a lower cleaning area, and the upper cleaning area is used for directly blowing light and impurity residues discharged by the threshing device out of the machine; the lower cleaning area is used for blowing large impurities out of the machine.
Further, a seed sliding plate and a shaking plate which form a funnel shape are arranged between the double-cylinder screen and the threshing device; the upper air outlet of the double-outlet cleaning fan is positioned above the seed sliding plate.
Furthermore, one end of the seed slide plate is positioned below the upper air outlet of the cleaning fan, and the other end of the seed slide plate extends to the edge of the double-cylinder screen; the included angle between the plane formed by the edge of the tail end of the seed sliding plate and the axial lines of the double-cylinder screen shaft and the horizontal plane is more than 45 degrees; the included angle between the grain sliding plate and the horizontal plane is larger than the internal friction angle of the threshing grains.
Furthermore, a guide strip is arranged on the seed sliding plate and used for guiding the materials stacked on two sides of the seed sliding plate to the middle.
Furthermore, the guide strips are symmetrically distributed on the seed sliding plate in a splayed shape, and the included angle between the guide strips symmetrically distributed in the splayed shape is 40-80 degrees; the guide strips symmetrically distributed in the shape of the Chinese character 'ba' equally divide the blanking port of the seed slide plate into equal widths. Because the threshing material of the longitudinal axial flow threshing device is large in blanking amount at the front part of the cleaning chamber and uneven in transverse distribution, the threshing material is in a rule of 'high at two sides and low at the middle', and the materials piled at two sides of the seed grain sliding plate are guided to the middle by the flow guide strips symmetrically distributed in a 'splayed' shape.
Furthermore, one end of the shaking plate is positioned below the other end of the threshing device, and the other end of the shaking plate is positioned above the double-cylinder sieve; and one end of the shaking plate is provided with a vibration mechanism for enabling the shaking plate to swing between an included angle of 10-25 degrees with the horizontal plane.
A longitudinal axial flow ratoon rice combine harvester comprises the double-cylinder screen cleaning device.
The beneficial effects of the utility model reside in that:
1. double cylinder sieve cleaning plant, clean fan make full use of thresher and clean limited longitudinal space between the mechanism and carry out preliminary selection by winnowing through two exports, can reduce the design power of cylinder sieve, the rational utilization fan will be light and miscellaneous after directly blow off outside, and need not be through throwing of cylinder sieve.
2. Double cylinder sieve cleaning plant, clean the fan through double cylinder sieve and two exports and use in axis of ordinates flows ratooning rice combine, can the two advantage of the two separately of make full use of, accord with the material characteristic of ratooning first season rice, can effectively improve ratooning rice combine's work effect.
3. Two drum sieve cleaning plant, two export cleaning fan can adapt to the operating condition under the various different feeding volume on the basis of subtracting heavy damping.
4. Double cylinder sieve cleaning plant, air outlet department separates into upper air duct and lower wind channel through the aviation baffle under, with air current two cylinder sieve axle tops and below of leading respectively, can not only effectively improve cleaning ability, can also compensate the limited shortcoming of preceding cylinder sieve diameter.
5. Double drum sieve cleaning plant, the drum sieve passes through the pulley drive, can change the rotational speed of drum sieve through the band pulley of changing different diameters to and the different rotational speed cooperations of drum sieve around realizing, thereby adapt to different operating condition, improve and clean efficiency.
6. Double cylinder sieve cleaning plant, cylinder sieve adopt grid type screen cloth, can greatly improve the rate of sieving through of seed grain, be fit for the characteristics that regenerated rice takes off that the seed grain content is high, be difficult for causing the jam, improved cleaning efficiency.
7. Two drum sieve cleaning plant, the seed grain distribution condition that the thresher threshed out the thing is for reducing gradually from the front to back seed grain content for the axis of ordinates flows, 2/3 partial seed grains easily take place to pile up before the casing, the angle between seed grain slide and the horizontal plane is greater than the internal friction angle of rice seed grain, can guarantee that the seed grain slides in preceding drum sieve smoothly.
8. Two drum sieve cleaning plant, the seed grain distribution condition that the thresher threshed the thing is for rising gradually from the centre to both sides seed grain content, can make to shed the thing and fall on preceding drum sieve uniformly through being equipped with the water conservancy diversion strip at seed grain slide upper surface, reduce and clean the load, improve and clean the effect.
9. Longitudinal axis flow ratoon rice combine, longitudinal space between its threshing cylinder and the cleaning sieve is less, fan is cleaned in two exports, seed grain slide and shake the board and cut apart into two upper and lower regions with the cleaning room, and casing latter half adopts the shake board can shake the thing and shake off to preceding drum sieve in limited inclination, reserve out more longitudinal space, the space between shake board and the concave plate sieve has constituted the air outlet, the thing of threshing out has passed through the selection by winnowing of cleaning fan on the in-process of drum sieve earlier along seed grain slide and shake board fall into, thereby the material has carried out twice cleaning in limited space, the quality of cleaning is improved.
Drawings
FIG. 1 is a schematic view of a cylindrical screen cleaning mechanism in the prior art;
FIG. 2 is a schematic structural view of the cleaning device with double cylindrical screens of the utility model;
FIG. 3 is a schematic view of the angles of the air inlets and the air outlets of the double-outlet cleaning fan of the utility model;
fig. 4 is a schematic structural diagram of the cylindrical screen according to the present invention;
fig. 5 is a schematic structural view of the seed slide plate of the present invention;
fig. 6 is a top view of the seed slide plate of the present invention;
fig. 7 is a schematic structural diagram of the shaking plate according to the present invention.
In the figure:
1-a cleaning fan with double outlets; 2-a wind deflector; 3-a cylindrical screen; 4-kernel sliding plate; 5-a grain conveying screw conveyor; 6-shaking the board; 7-a vibration mechanism; 8-concave sieve; 301-front cylindrical screen; 302-back cylinder screen; 401-guide strips.
Detailed Description
The invention will be further described with reference to the drawings and the following examples, but the scope of the invention is not limited thereto.
As shown in fig. 2, the cleaning and sorting device with double cylindrical sieves of the utility model comprises a longitudinal axial flow threshing device, a grain conveying auger 5, double cylindrical sieves 3 and a cleaning and sorting fan 1 with double outlets, wherein the longitudinal axial flow threshing device is positioned above the double cylindrical sieves 3, and the grain conveying auger 5 is positioned at the bottom of the double cylindrical sieves 3; the longitudinal axial flow threshing device and the grain conveying auger 5 are of the prior structure and are not described. The lower air outlet of the cleaning fan 1 with double outlets is positioned in front of the double cylindrical screens 3 and is used for being matched with the double cylindrical screens 3 to blow out the large impurities out of the machine; the upper air outlet of the double-outlet cleaning fan 1 is positioned above the double-cylinder sieve 3 and is used for directly blowing the light and impurity residues discharged by the threshing device out of the machine. The double-outlet cleaning fan 1 makes full use of the limited longitudinal space between the threshing device and the cleaning mechanism to carry out primary air separation, the design power of the cylindrical screen can be reduced, the fan is reasonably utilized, light and impurity residues are directly blown out of the cylindrical screen, and throwing through the cylindrical screen is not needed.
The lower air outlet of the cleaning fan 1 with double outlets is divided into an upper air duct and a lower air duct by an air deflector 2; the upper air duct is used for blowing air flow to the upper part of the sieve shaft of the double-cylinder sieve 3, and the lower air duct is used for blowing air flow to the lower part of the sieve shaft of the double-cylinder sieve 3. The lower air outlet is divided into an upper air duct and a lower air duct by the air deflectors, and air flow is respectively guided to the upper part and the lower part of the sieve shaft of the double-cylinder sieve 3, so that the cleaning capacity can be effectively improved, and the defect that the diameter of the front cylinder sieve is limited can be overcome.
The double-outlet cleaning fan 1 can be a cross-flow fan, as shown in fig. 2, the angle a of the air inlet of the double-outlet cleaning fan 1 is not less than 120 degrees, and the angle b of the lower air outlet of the double-outlet cleaning fan 1, namely the central angle corresponding to the lower diffusion arc, is 120-140 degrees; the central angle corresponding to the diffusion arc on the angle c of the upper air outlet of the double-outlet cleaning fan 1 is 90-100 degrees.
The double-cylinder screen 3 comprises a front cylinder screen 301 and a rear cylinder screen 302, and is used in the longitudinal axial flow ratoon rice combine harvester through the double-cylinder screen and the double-outlet cleaning fan, so that the respective advantages of the double-cylinder screen and the double-outlet cleaning fan can be fully utilized, the material characteristics of ratoon rice in first season rice are met, and the working effect of the ratoon rice combine harvester can be effectively improved. The rotation speed of the front cylindrical sieve 301 and the rotation speed of the rear cylindrical sieve 302 can be different, and the rotation speed of the front cylindrical sieve 301 and the rotation speed of the rear cylindrical sieve 302 are different by utilizing different belt rotations through any transmission shaft in the harvester. The rotating speed of the cylindrical screen can be changed by replacing belt wheels with different diameters, and the matching of the front cylindrical screen and the rear cylindrical screen with different rotating speeds is realized, so that the cleaning machine is suitable for different working conditions, and the cleaning efficiency is improved; the diameter of the rear cylindrical screen 302 is 0.8-1 times of that of the front cylindrical screen 301; the rotating speed of the rear cylindrical screen 302 is not less than that of the front cylindrical screen 301. As shown in figure 3, the double-cylinder screen 3 adopts a fence type screen, the gap between the screens is 10mm to 20mm, the screening penetration rate of grains can be greatly improved, the double-cylinder screen is suitable for the characteristic of high grain content of the threshing material of the regenerated rice, the blockage is not easy to cause, and the cleaning efficiency is improved.
As shown in fig. 2, 5 and 6, the grain sliding plate 4 and the shaking plate 6 divide the cleaning room into an upper cleaning area and a lower cleaning area, and the upper cleaning area is used for directly blowing the light and impurity residues discharged by the threshing device out of the machine; the lower cleaning area is used for blowing large impurities out of the machine. A seed sliding plate 4 and a shaking plate 6 which form a funnel shape are arranged between the double-cylinder screen 3 and a concave plate screen 8 of the threshing device; the upper air outlet of the double-outlet cleaning fan 1 is positioned above the seed sliding plate 4. One end of the seed slide plate 4 is positioned below the upper air outlet of the cleaning fan 1, and the other end of the seed slide plate 4 extends to the edge of the front cylindrical screen 301; the included angle between the plane formed by the edge of the tail end of the seed sliding plate 4 and the axis of the sieve shaft of the front cylindrical sieve 301 and the horizontal plane is more than 45 degrees; the included angle between the grain sliding plate 4 and the horizontal plane is larger than the internal friction angle of the threshing grains. The grain distribution of the threshing material of the longitudinal axial flow threshing device is gradually reduced from front to back, 2/3 parts of grains in the front of the casing are easy to accumulate, and the angle between the grain sliding plate and the horizontal plane is larger than the internal friction angle of rice grains, so that the grains can be ensured to smoothly slide into the front cylindrical sieve. The kernel sliding plate 4 is provided with a flow guide strip 401 for guiding the materials piled on two sides of the kernel sliding plate 4 to the middle. The guide strips 401 are symmetrically distributed on the seed sliding plate 4 in a splayed shape, and the included angle between the guide strips 401 symmetrically distributed in the splayed shape is 40-80 degrees; the guide strips 401 symmetrically distributed in the shape of the Chinese character 'ba' equally divide the blanking port of the seed slide plate 4 into equal widths. Because the big and horizontal distribution of the anterior blanking volume of vertical axis stream cylinder eduction in the cleaning room is uneven, is the law of "both sides height in the middle of low", consequently, two water conservancy diversion strips 401 that are "eight" word form distribution are established to seed grain slide 4 upper surface, with the material direction centre of piling up of both sides, two water conservancy diversion strips 401 symmetric distribution, the two is 20 to 40 with the contained angle of symmetry axis, and two water conservancy diversion strips 401 divide into the three regions that length equals with seed grain slide 4 blanking department, as shown in fig. 6.
As shown in fig. 2 and 7, one end of the shaking plate 6 is located below the other end of the concave sieve 8 of the threshing device, and the other end of the shaking plate 6 is located above the rear cylindrical sieve 302; one end of the shaking plate 6 is provided with a vibration mechanism 7, and the vibration mechanism 7 is an eccentric vibration mechanism and is used for enabling the shaking plate 6 to swing between an included angle of 10 degrees and 25 degrees with a horizontal plane.
The utility model provides a vertical axis flows ratoon rice combine harvester, include two drum sieve cleaning plant, the longitudinal space between its thresher and the cleaning sieve is less, through two export cleaning fan 1, seed grain slide 4 and shake board 6 have been cut apart into two upper and lower regions with the cleaning room, and the casing latter half adopts shake board 6 can shake off the thing to preceding drum sieve 301 in limited inclination, reserve out more longitudinal space, the space between shake board 6 and the notch board sieve 8 has constituted the air outlet, the thing that takes off has earlier passed through the selection by winnowing of cleaning fan air outlet on the in-process that falls into preceding drum sieve along seed grain slide 4 and shake board 6, thereby material has carried out twice in limited space, cleaning quality has been improved.
The working process is as follows:
as shown in fig. 2, the threshed material falls on the grain sliding plate 4 and the shaking plate 6 above the cleaning mechanism from the longitudinal direction of the whole threshing device, according to the characteristics of the longitudinal axial flow threshing cylinder, the grain content of the threshed material in the length range of 2/3 in the front of the mechanism is high, the threshed material is unevenly distributed, the fallen grains are easy to accumulate, the grain content of the threshed material in the length range of 1/3 is low, the threshed material is evenly distributed, and the included angle between the grain sliding plate 4 and the horizontal plane is larger than the inner friction angle of the grains, so the threshed material can slide down along the grain sliding plate 4; the shaking plate 6 can be a corrugated plate by shaking at a certain frequency, the threshed objects falling on the shaking plate can be pushed forwards, the guide strips welded on the upper surface of the grain sliding plate 5 are beneficial to transversely and uniformly falling the threshed objects above the front cylindrical sieve 301, simultaneously, airflow blown out from the air outlet of the double-outlet cleaning fan 1 can carry out primary air separation on the threshed objects in the process of falling the threshed objects to the front cylindrical sieve 301, and light impurities in the threshed objects can be blown out of the air outlet formed between the rear part of the shaking plate 6 and the concave plate sieve 8 along with the airflow. The cylindrical sieve 3 adopts a fence type sieve mesh, so that the grain penetration rate is effectively improved, the cylindrical sieve 3 rotates at a constant speed, particles with smaller sizes in the threshed objects, such as grains and some fine impurities, pass through the sieve mesh, wherein the floating coefficient of the grains is larger, the grains fall into the grain conveying auger 6 after passing through the lower part of the cylindrical sieve 3, the floating coefficient of the fine impurities is smaller, the fine impurities are blown out of the cylindrical sieve 3 and are discharged out of the machine under the action of air flow, and the large impurities such as short stems, blades and the like which do not pass through the sieve mesh are thrown backwards by the front cylindrical sieve 301 and the rear cylindrical sieve 302 in sequence and are blown out of the machine through an impurity outlet under the coordination of the air.
The embodiment is a preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and any obvious improvement, replacement or modification which can be made by those skilled in the art without departing from the essence of the present invention belongs to the protection scope of the present invention.

Claims (12)

1. A cleaning device with double cylindrical sieves is characterized by comprising double cylindrical sieves (3) and a cleaning fan (1) with double outlets, wherein the lower air outlet of the cleaning fan (1) with double outlets is positioned in front of the double cylindrical sieves (3) and used for being matched with the double cylindrical sieves (3) to blow large impurities out of the machine; the upper air outlet of the double-outlet cleaning fan (1) is positioned above the double-cylinder sieve (3) and is used for directly blowing the light and impurity residues discharged by the threshing device out of the machine.
2. A cleaning device with double cylindrical screens according to claim 1, characterized in that the lower air outlet of the cleaning fan (1) with double outlets is divided into an upper air duct and a lower air duct by an air deflector (2); the upper air duct is used for blowing air flow to the upper side of the sieve shaft of the double-cylinder sieve (3), and the lower air duct is used for blowing air flow to the lower side of the sieve shaft of the double-cylinder sieve (3).
3. A double-cylinder screen cleaning plant according to claim 1, characterized in that the air inlet angle a of the double-outlet cleaning fan (1) is not less than 120 °, and the lower air outlet angle b of the double-outlet cleaning fan (1) is 120 ° -140 °; the angle c of the upper air outlet of the double-outlet cleaning fan (1) is 90-100 degrees.
4. A double cylindrical screen cleaning plant according to claim 1, characterized in that the double cylindrical screen (3) comprises a front cylindrical screen (301) and a rear cylindrical screen (302), the rear cylindrical screen (302) having a diameter 0.8-1 times the diameter of the front cylindrical screen (301); the rotating speed of the rear cylindrical screen (302) is not less than that of the front cylindrical screen (301).
5. A double cylindrical screen cleaning plant according to claim 1, characterized in that the double cylindrical screen (3) employs a barrier type screen mesh, the screen mesh gap being between 10mm and 20 mm.
6. A cleaning plant with double cylindrical screens as claimed in claim 1, characterized by further comprising a grain sliding plate (4) and a shaking plate (6), wherein the grain sliding plate (4) and the shaking plate (6) divide the cleaning room into an upper cleaning area and a lower cleaning area, and the upper cleaning area is used for directly blowing the light and impurity residue discharged by the cleaning plant out of the machine; the lower cleaning area is used for blowing large impurities out of the machine.
7. A cleaning and sorting plant according to claim 1, characterized in that a grain sliding plate (4) and a shaking plate (6) forming a funnel shape are provided between the double cylindrical screen (3) and the threshing device; the upper air outlet of the double-outlet cleaning fan (1) is positioned above the seed sliding plate (4).
8. A cleaning plant with double cylindrical screens according to claim 6, characterized in that one end of the grain sliding plate (4) is positioned below the upper air outlet of the cleaning fan (1), and the other end of the grain sliding plate (4) extends up to the edges of the double cylindrical screens (3); the included angle between the plane formed by the edge of the tail end of the seed sliding plate (4) and the axis of the sieve shaft of the double-cylinder sieve (3) and the horizontal plane is more than 45 degrees; the included angle between the kernel sliding plate (4) and the horizontal plane is larger than the internal friction angle of the threshing kernels.
9. A cleaning and sorting device with double cylindrical screens as claimed in claim 6, characterized in that the grain sliding plate (4) is provided with guide strips (401) for guiding the materials piled on both sides of the grain sliding plate (4) to the middle.
10. A cleaning and sorting device with double cylindrical screens according to claim 9, characterized in that the guide strips (401) are symmetrically distributed in a splayed shape on the grain sliding plate (4), and the included angle between the guide strips (401) symmetrically distributed in a splayed shape is 40-80 degrees; the guide strips (401) symmetrically distributed in the shape of a Chinese character 'ba' equally divide the blanking port of the seed slide plate (4) into equal widths.
11. A cleaning and sorting plant according to claim 6, characterized in that the shaker deck (6) has one end below the other end of the thresher deck and the other end of the shaker deck (6) is above the double cylindrical screen (3); and one end of the shaking plate (6) is provided with a vibration mechanism (7) for enabling the shaking plate (6) to swing between an included angle of 10 degrees to 25 degrees with the horizontal plane.
12. A longitudinal axial flow ratoon rice combine harvester, characterized in that it comprises a double cylindrical screen cleaning device according to any one of claims 1-11.
CN201921203547.6U 2019-07-29 2019-07-29 Double-cylinder screen cleaning device and longitudinal axial flow ratoon rice combine harvester thereof Active CN210671326U (en)

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CN201921203547.6U CN210671326U (en) 2019-07-29 2019-07-29 Double-cylinder screen cleaning device and longitudinal axial flow ratoon rice combine harvester thereof

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Application Number Priority Date Filing Date Title
CN201921203547.6U CN210671326U (en) 2019-07-29 2019-07-29 Double-cylinder screen cleaning device and longitudinal axial flow ratoon rice combine harvester thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110476592A (en) * 2019-07-29 2019-11-22 江苏大学 A kind of double drum sieve cleaning plants and its longitudinal axial flow ratooning rice combined harvester

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110476592A (en) * 2019-07-29 2019-11-22 江苏大学 A kind of double drum sieve cleaning plants and its longitudinal axial flow ratooning rice combined harvester

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