Combined flexible grain separating device

Abstract

The application discloses a combined flexible grain threshing device and belongs to the technical field of agricultural machinery. The structure comprises a feeding stirrer, a flow guide cover, a cylinder cover, a threshing cylinder and a concave screen. The cylinder cover is fixedly arranged above the threshing cylinder. The concave screen is sleeved outside the threshing cylinder and fixedly connected below the cylinder cover. The feeding stirrer is fixedly arranged at the inlet end of the threshing cylinder. The flow guide cover is sleeved outside the feeding stirrer and fixedly connected to the front part of the concave screen. The application increases the diameter of the threshing rod teeth, increases the threshing area, reduces the contact stress between the rod teeth and the grains during threshing, and reduces the grain breakage. The threshing elements are staggered, the number of hits of the threshing objects is increased, the threshing efficiency is improved, and the power consumption of the cylinder is reduced. The flexible rod teeth are adopted, the threshing objects of different sizes are adapted, the contact probability of small threshing objects is increased, the complete threshing rate is improved, and the phenomenon that the threshing objects are broken due to mutual extrusion is prevented.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of agricultural machinery, in particular to a combined flexible grain threshing and separating device. BACKGROUND

[0002] It is an important goal to realize low-loss and high-efficiency corn threshing in corn harvesting. Threshing is the main cause of corn kernel breakage and crushing, which seriously affects the quality and quantity of harvested products, especially for corn kernels with high moisture content. With the continuous improvement of harvesting speed and feeding amount, corn crushing is serious, and the harvesting effect is poor, resulting in serious food waste. During the corn threshing process, the threshing elements directly contact the corn, which causes impact, crushing, rubbing and other effects on the corn ears, so as to realize the separation of corn kernels from the corn core shaft and obtain corn kernels.

[0003] The existing corn threshing device mainly includes a feeding inlet, an upper cover plate, a concave screen, a threshing drum and threshing elements. The threshing elements are mainly nail teeth, plate teeth, bar type and blade type. At present, there are mainly two threshing modes of axial flow threshing drum and differential roller. The corn enters the feeding inlet, and the ears are threshed under the combined action of impact, rubbing and extrusion of the threshing elements and the concave screen, and the kernels are leaked out of the gap of the concave screen and transported to the outlet. The axial flow threshing drum type threshing device has problems such as high breakage rate and crushing rate in the threshing process. The corn enters the middle of two differential counter-rotating rollers, and is threshed under the impact and rubbing action of the threshing elements on the rollers, and the kernels are leaked out of the gap between the two rollers and transported to the outlet. Although the differential roller type corn threshing device improves the threshing rate and reduces the crushing rate to some extent, the feeding amount is low due to structural problems. It can be found that the current threshing device has defects such as high breakage rate and low threshing efficiency. SUMMARY

[0004] The present application aims at the technical defects of the prior art, and provides a combined flexible grain threshing and separating device to solve the technical problems of the conventional threshing device, such as high breakage rate and low threshing efficiency.

[0005] To achieve the above technical purpose, the following technical scheme is adopted in the present application.

[0006] A combined flexible grain threshing and separating device, comprising a feeding auger, a flow guide cover, a drum cover, a threshing drum and a concave screen. The drum cover is fixedly arranged above the threshing drum, the concave screen is sleeved on the outer side of the threshing drum and fixedly connected below the drum cover, the feeding auger is fixedly arranged at the inlet end of the threshing drum, and the flow guide cover is sleeved on the outer side of the feeding auger and fixedly connected to the front part of the concave screen.

[0007] As preferred, the threshing cylinder comprises a threshing tooth bar and a width plate fixedly supported inside the threshing tooth bar, the threshing tooth bar is provided with threshing elements, the threshing elements comprise rigid bar teeth and flexible bar teeth, the diameters of the rigid bar teeth and the flexible bar teeth are both 20-25 mm, the rigid bar teeth are welded to the outside of the threshing tooth bar, the flexible bar teeth are hinged to the outside of the threshing tooth bar, the front part of the threshing cylinder is provided with 2-3 groups of the rigid bar teeth, the middle part of the threshing cylinder is provided with 5-6 groups of the flexible bar teeth, and the rear part of the threshing cylinder is provided with 3-4 groups of the rigid bar teeth.

[0008] As preferred, the concave sieve is provided with a plurality of steel lattice strips, the concave sieve is equally divided into a front concave sieve, a middle concave sieve and a rear concave sieve at the front part, the middle part and the rear part of the threshing cylinder, the gap between the steel lattice strips on the front concave sieve is 2-3 times the maximum length of the threshing objects, and the gap between the steel lattice strips on the middle concave sieve and the rear concave sieve is 1.5-2 times the maximum length of the threshing objects.

[0009] As preferred, the flexible bar teeth comprise a flinging shaft seat, a plurality of flinging shafts are hingedly arranged on the flinging shaft seat, the gap between adjacent two flinging shafts is greater than the maximum length of the threshing objects, and the distance d between the flinging shafts and the threshing tooth bar is greater than the sum of the length of the flinging shaft and the maximum length of the threshing objects.

[0010] As preferred, the threshing elements between adjacent two groups of threshing tooth bars are arranged in a staggered manner, and the staggered displacement is half of the gap between adjacent threshing elements.

[0011] As preferred, the direction of the steel lattice strips on the concave sieve is parallel to the direction of the axis of the threshing cylinder.

[0012] As preferred, the concave sieve comprises a concave sieve frame, the steel lattice strips are welded to the concave sieve frame, and the diameter of the steel lattice strips is 8-10 mm.

[0013] The application discloses a combined flexible grain threshing and separating device.

[0014] 1. The threshing bar teeth are thickened, the threshing area is increased, the contact stress between the bar teeth and the grains during threshing is reduced, and the grain breakage is reduced.

[0015] 2. The threshing elements are arranged in a staggered manner, the hitting times of the threshing objects are increased, the threshing efficiency is improved, and the power consumption of the cylinder is reduced.

[0016] 3. The flexible bar teeth are suitable for threshing different sizes of threshing objects (corns), the touching probability of small threshing objects is increased, the threshing rate is improved, the phenomenon that the threshing objects are pressed against each other to cause breakage is prevented, and the grain breakage rate is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 This is a perspective view of the entire invention;

[0018] Fig. 2 This is a front view of the threshing drum in this invention;

[0019] Fig. 3 This is a front view of the concave plate sieve in this invention;

[0020] Fig. 4 This is a perspective view of the flexible rod teeth in this invention;

[0021] In the picture:

[0022] 1. Feeding auger; 2. Flow guide hood; 3. Drum cover; 4. Threshing drum; 5. Concave plate screen; 6. Rigid rod teeth; 7. Spread disc; 8. Flexible rod teeth; 9. Threshing toothed rod; 10. Front concave plate screen; 11. Middle concave plate screen; 12. Rear concave plate screen; 13. Reinforcing steel grid strips; 14. Throwing shaft; 15. Throwing shaft seat. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in detail below. To avoid excessive and unnecessary detail, well-known structures or functions will not be described in detail in the following embodiments. The approximate language used in the following embodiments is for quantitative purposes, indicating that a certain degree of variation in quantity is permissible without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art to which this invention pertains.

[0024] Example 1

[0025] A combined flexible grain separating device, such as Figs. 1-4 As shown, it includes a feeding auger 1, a flow guide 2, a drum cover 3, a threshing drum 4, and a concave sieve 5; the drum cover 3 is fixedly disposed above the threshing drum 4, the concave sieve 5 is sleeved on the outside of the threshing drum 4 and fixedly connected to the bottom of the drum cover 3, the feeding auger 1 is fixedly disposed at the inlet end of the threshing drum 4, and the flow guide 2 is sleeved on the outside of the feeding auger 1 and fixedly connected to the front of the concave sieve 5.

[0026] Example 2

[0027] A combined flexible grain separating device, such as Figs. 1-4As shown, it comprises a feeding auger 1, a flow guide cover 2, a cylinder cover 3, a threshing cylinder 4, and a concave screen 5; the cylinder cover 3 is fixedly arranged above the threshing cylinder 4, the concave screen 5 is sleeved outside the threshing cylinder 4 and fixedly connected below the cylinder cover 3, the feeding auger 1 is fixedly arranged at the inlet end of the threshing cylinder 4, and the flow guide cover 2 is sleeved outside the feeding auger 1 and fixedly connected to the front part of the concave screen 5. The threshing cylinder 4 comprises a threshing tooth bar 9 and a width disc 7, the width disc 7 is fixedly supported inside the threshing tooth bar 9, the threshing tooth bar 9 is provided with threshing elements, the threshing elements comprise rigid bar teeth 6 and flexible bar teeth 8, the diameters of the rigid bar teeth 6 and the flexible bar teeth 8 are both 20-25 mm, the rigid bar teeth 6 are welded outside the threshing tooth bar 9, and the flexible bar teeth 8 are hinged outside the threshing tooth bar 9; the front part of the threshing cylinder 4 is provided with two to three groups of the rigid bar teeth 6, the middle part of the threshing cylinder 4 is provided with five to six groups of the flexible bar teeth 8, and the rear part of the threshing cylinder 4 is provided with three to four groups of the rigid bar teeth 6. The concave screen 5 is provided with a plurality of steel lattice strips 13, the concave screen 5 is equally divided into a front concave screen 10, a middle concave screen 11 and a rear concave screen 12 at the front part, the middle part and the rear part of the threshing cylinder 4, the gap between the steel lattice strips 13 on the front concave screen 10 is 2-3 times the maximum length of the threshing object, and the gap between the steel lattice strips 13 on the middle concave screen 11 and the rear concave screen 12 is 1.5-2 times the maximum length of the threshing object. The flexible bar teeth 8 comprise a flinging shaft seat 15, and a plurality of flinging shafts 14 are hingedly arranged on the flinging shaft seat 15 with a gap between adjacent two shafts being greater than the maximum length of the threshing object, and the distance d between the flinging shaft 14 and the threshing tooth bar 9 is greater than the sum of the length of the flinging shaft 14 and the maximum length of the threshing object. The threshing elements between adjacent two groups of the threshing tooth bar 9 are arranged in a staggered manner, and the staggered displacement is half the gap between adjacent threshing elements. The direction of the steel lattice strips 13 on the concave screen 5 is parallel to the direction of the axis of the threshing cylinder 4. The concave screen 5 comprises a concave screen frame, the steel lattice strips 13 are welded on the concave screen frame, and the diameter of the steel lattice strips 13 is 8-10 mm.

[0028] The above describes the embodiments of the present application in detail, but the above description is only the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the scope of the present application should be included in the protection scope of the present application.

Claims

1. A combined flexible grain cleaning and separating device, characterized in that, It includes feeding stirrups (1), fairing (2), drum cover (3), cylinder (4), concave sieve (5); The drum cover (3) is fixedly arranged above the cylinder (4), the concave sieve (5) is arranged outside the cylinder (4) and is fixedly connected below the drum cover (3), the feeding stirrup (1) is fixedly arranged at the inlet end of the cylinder (4), and the fairing (2) is arranged outside the feeding stirrup (1) and is fixedly connected to the front part of the concave sieve (5). The cylinder (4) includes a threshing tooth rod (9) and a width disc (7), the width disc (7) is fixedly supported inside the threshing tooth rod (9), the threshing tooth rod (9) is provided with a threshing element, the threshing element includes rigid rod teeth (6) and flexible rod teeth (8), the diameters of the rigid rod teeth (6) and the flexible rod teeth (8) are 20-25 mm, the rigid rod teeth (6) are welded outside the threshing tooth rod (9), the flexible rod teeth (8) are hinged outside the threshing tooth rod (9), the front part of the cylinder (4) is provided with 2-3 groups of rigid rod teeth (6), the middle part of the cylinder (4) is provided with 5-6 groups of flexible rod teeth (8), and the rear part of the cylinder (4) is provided with 3-4 groups of rigid rod teeth (6). The flexible rod teeth (8) include a flinging shaft seat (15), a plurality of flinging shafts (14) are hingedly arranged on the flinging shaft seat (15) and the gap between adjacent two shafts is greater than the maximum length of the threshing object seeds, and the distance d between the flinging shaft (14) and the threshing tooth rod (9) is greater than the sum of the length of the flinging shaft (14) and the maximum length of the threshing object seeds.

2. A combined flexible grain separating device according to claim 1, characterized in that A plurality of steel lattice strips (13) are arranged on the concave sieve (5), the concave sieve (5) is equally divided into a front concave sieve (10), a middle concave sieve (11) and a rear concave sieve (12) at the front part, the middle part and the rear part of the cylinder (4), the gap between the steel lattice strips (13) on the front concave sieve (10) is 2-3 times the maximum length of the threshing object seeds, and the gap between the steel lattice strips (13) on the middle concave sieve (11) and the rear concave sieve (12) is 1.5-2 times the maximum length of the threshing object seeds.

3. The combined flexible grain separating device according to claim 1, characterized in that, The threshing elements between adjacent two groups of threshing tooth rods (9) are arranged in a staggered manner, and the staggered displacement is half the gap between adjacent threshing elements.

4. The combined flexible grain separating device according to claim 2, wherein, The direction of the steel lattice strips (13) on the concave sieve (5) is parallel to the direction of the axis of the cylinder (4).

5. The combined flexible grain separating device according to claim 2, wherein, The concave sieve (5) includes a concave sieve frame, the steel lattice strips (13) are welded on the concave sieve frame, and the diameter of the steel lattice strips (13) is 8-10 mm.

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