阅读说明：本技术 小型自走式元胡收获机 (Small self-propelled rhizoma corydalis harvester ) 是由 任志贵 梁永永 魏万行 杜杰 梁杨 王军利 魏伟峰 刘菊蓉 于 2021-03-01 设计创作，主要内容包括：本发明提供了小型自走式元胡收获机,该收获机包括收获机机体、设于收获机机体前端的元胡攫取收集机构以及设于收获机机体上的筛分机构,还包括收获机行走机构,收获机行走机构包括设于收获机机体上的滚轮和对称设在收获机机体两侧的履带式行走装置；履带式行走装置包括固定架,通过转轴与收获机机体上设有的大同步带轮转动连接,大同步带轮与固定架上设有的小同步带轮通过履带连接；第一驱动装置,设在收获机机体上,并通过第一链条与大同步带轮链传动。本发明解决了现有的元胡收获机体积庞大和笨重、行动不灵活以及收获时导致压实土壤致使土壤破碎效率低的问题。(The invention provides a small self-propelled rhizoma corydalis harvester which comprises a harvester body, a rhizoma corydalis seizing and collecting mechanism arranged at the front end of the harvester body, a screening mechanism arranged on the harvester body and a harvester travelling mechanism, wherein the harvester travelling mechanism comprises rollers arranged on the harvester body and crawler-type travelling devices symmetrically arranged at two sides of the harvester body; the crawler type walking device comprises a fixed frame, a large synchronous belt wheel and a small synchronous belt wheel, wherein the fixed frame is rotationally connected with the large synchronous belt wheel arranged on the harvester body through a rotating shaft; the first driving device is arranged on the harvester body and is driven by the chain of the first chain and the large synchronous belt wheel. The invention solves the problems that the existing rhizoma corydalis harvester is large and heavy in volume and inflexible in movement, and soil crushing efficiency is low due to soil compaction during harvesting.)

1. The small self-propelled rhizoma corydalis harvester comprises a harvester body, a rhizoma corydalis seizing and collecting mechanism arranged at the front end of the harvester body, and a screening mechanism arranged on the harvester body, and is characterized by further comprising a harvester walking mechanism, wherein the harvester walking mechanism comprises rollers (23) arranged on the harvester body and crawler-type walking devices symmetrically arranged on two sides of the harvester body; the crawler type walking device comprises

The fixed frame (20) is rotationally connected with a large synchronous belt wheel (16) arranged on the harvester body through a rotating shaft (15), and the large synchronous belt wheel (16) is connected with a small synchronous belt wheel (17) arranged on the fixed frame (20) through a crawler belt (19);

the first driving device (21) is arranged on the harvester body and is driven by the chain of the first chain and the large synchronous belt wheel (16).

2. The small self-propelled rhizoma corydalis harvester as claimed in claim 1, wherein the fixed frame (20) is a tripod, the large synchronous pulley (16) is rotatably connected with the top corner of the tripod through a rotating shaft (15), the number of the small synchronous pulleys (17) is two, the two small synchronous pulleys (17) are respectively rotatably connected with the two bottom corners of the tripod, and a plurality of auxiliary small wheels (18) are arranged on the bottom side of the tripod between the two small synchronous pulleys (17).

3. The small self-propelled rhizoma corydalis harvester as claimed in claim 1, wherein the rhizoma corydalis seizing and collecting mechanism comprises an excavating device for excavating rhizoma corydalis, two soil breaking devices for breaking the soil blocks carried by the excavated rhizoma corydalis, and a chain plate transmission device for transmitting the broken rhizoma corydalis, wherein three transmission shafts of the chain plate transmission device are arranged in a V shape, wherein a transmission shaft is connected with a second driving device (8) for driving the transmission shaft to rotate through a first belt, each first chain wheel arranged on each transmission shaft is connected through a second chain (7), a second chain wheel used for keeping the chain transmission between the second chain (7) and the first chain wheel on the transmission shaft is arranged right above the transmission shaft at the lowest point in the three transmission shafts arranged in a V shape, the two soil crushing devices and one soil crushing device and the second driving device (8) are synchronously driven through a second belt.

4. The small self-propelled rhizoma corydalis harvester as claimed in claim 3, wherein the digging device for digging rhizoma corydalis comprises a plurality of digging shovels (1) and a plurality of fixing plates (4) for fixing the digging shovels, the fixing plates (4) are uniformly arranged at the front end of the feeding port of the chain plate conveying device, each digging shovel (1) is in one-to-one correspondence with each fixing plate (4) and is detachably connected with each fixing plate, and the front end of each digging shovel (1) is in a convex arc structure.

5. The small self-propelled rhizoma corydalis harvester of claim 3, wherein the two soil breaking devices comprise a big (6) and a small (6) crushing roller, and protrusions (5) for breaking soil are arranged on the big (6) and the small (6) crushing rollers, and the big (6) crushing roller is positioned in front of the small crushing roller.

6. The small self-propelled rhizoma corydalis harvester of claim 5, wherein the chain plate conveyor is arranged below the large crushing roller (6) and the small crushing roller, a sieve hole for enabling crushed soil to fall is arranged on a chain plate (9) of the chain plate conveyor, and a first baffle (10) for preventing the upwardly conveyed rhizoma corydalis from falling is arranged on the side edge of the chain plate (9) of the chain plate conveyor.

7. The small self-propelled rhizoma corydalis harvester of claim 1, wherein the harvester body comprises a front frame (11) and a rear frame (24), the screening mechanism is arranged on the front frame (11), the crawler-type travelling device and the two rear rollers (23) of the harvester travelling mechanism are arranged on the rear frame (24), the front rollers (23) are arranged on the front frame (11), the front end of the front frame (11) is rotatably connected with the rhizoma corydalis grabbing and collecting mechanism, and the rear frame (24) is provided with a hand-held handle (27).

8. The small self-propelled rhizoma corydalis harvester of claim 7, wherein the screening mechanism is arranged below the front frame (11), the screening mechanism comprises a U-shaped frame (28) connected with the front frame, a screen (13) with a second baffle plate (14), a rocker (32), an eccentric wheel (33) and a third driving device (12), the screen (13) is positioned in the U-shaped frame (28), and is hinged with a plurality of vertical plates (30) symmetrically arranged on the outer side of the U-shaped frame (28), a plurality of rocker shafts (29) transversely arranged are hinged between the two symmetrically arranged vertical plates (30), one rocker shaft (29) close to one side of the third driving device (12) is connected with the lower end of a rocker (32), the high end of the rocker (32) is hinged on a wheel disc of an eccentric wheel (33), the eccentric wheel (33) is in key connection with an output shaft of a third driving device (12) arranged on the U-shaped frame (28).

9. The small self-propelled rhizoma corydalis harvester as claimed in claim 1, wherein two layers of screens (13) are arranged in the U-shaped frame (28), and the apertures of the two layers of screens (13) are sequentially reduced from top to bottom.

10. The small self-propelled rhizoma corydalis harvester as claimed in claim 1, wherein a limiting wheel (2) for limiting the penetration depth of the digging shovel (1) is further arranged above the digging device, and the limiting wheel (2) is fixedly connected with the digging shovel bottom plate (4) through a connecting rod (3).

Technical Field

The invention belongs to the technical field of rhizoma corydalis harvesting equipment, and particularly relates to a small self-propelled rhizoma corydalis harvester.

Background

Rhizoma corydalis is named as rhizoma corydalis and corydalis tuber, and has four effects of promoting blood circulation, removing blood stasis, regulating vital essence, relieving pain, clearing intestine and discharging feces as a traditional Chinese medicinal material, the rhizoma corydalis is mainly in the shape of earthy yellow, is roughly in the shape of an ellipsoid, and generally has the minimum diameter of 0.5cm and the maximum diameter of 2.5 cm. Corydalis tuber is produced in Xinyang, Pankanan and the like in east yang and south yang cities of Zhejiang at early stage, and has been developed in large scale in Hanzhong areas of Shaanxi in recent years. The yield of urban solid, county and area such as southern Zheng district in Hanzhong city in Shaanxi is large, and accounts for 60% -70% of the total yield of the whole country. But the mechanical level of rhizoma corydalis harvesting is lower at present, most of rhizoma corydalis is harvested by traditional manual harvesting, and the production efficiency is low. Therefore, there is a need to develop a small wheeled harvester suitable for harvesting rhizoma corydalis, so as to improve the labor productivity and increase the income.

With the continuous development of agricultural machinery equipment in recent years, some rhizoma corydalis harvesting machines, such as self-propelled high-efficiency rhizoma corydalis harvesters, have appeared, and the efficiency of the harvesters is improved compared with the traditional manual harvesting method. However, the corydalis tuber harvester is bulky and heavy, needs to be towed to a working place by a truck, is very inconvenient to use and inflexible to move, and is bulky and heavy, so that soil is compacted by the harvester during actual harvesting and is difficult to break.

Disclosure of Invention

The invention aims to solve the problems of heavy volume, inflexible action and low soil crushing efficiency caused by soil compaction of the harvester in the prior art, and provides a small-sized self-propelled rhizoma corydalis harvester. The digging device can effectively dig the rhizoma corydalis in the soil, and the crushing mechanism is divided into two stages, can effectively crush massive soil without large-area soil blockage. The screening and conveying mechanism is arranged below the crushing mechanism, the rhizoma corydalis and the soil are primarily separated, the soil leaks from the conveying belt, the rhizoma corydalis is conveyed to the next-stage independent screening mechanism, and the rhizoma corydalis and the soil are further screened and separated in the independent screening mechanism.

In order to achieve the purpose, the invention provides a small-sized self-propelled rhizoma corydalis harvester which comprises

The harvester comprises a harvester body, a rhizoma corydalis seizing and collecting mechanism arranged at the front end of the harvester body, a screening mechanism arranged on the harvester body and a harvester walking mechanism, wherein the harvester walking mechanism comprises rollers arranged on the harvester body and crawler-type walking devices symmetrically arranged on two sides of the harvester body; the crawler type walking device comprises

The fixed frame is rotationally connected with a large synchronous belt wheel arranged on the harvester body through a rotating shaft, and the large synchronous belt wheel is connected with a small synchronous belt wheel arranged on the fixed frame through a crawler belt;

the first driving device is arranged on the harvester body and is driven by the chain of the first chain and the large synchronous belt wheel.

Preferably, the mount is the tripod, big synchronous pulley rotates through pivot and tripod apex angle to be connected, little synchronous pulley is two, and two little synchronous pulleys rotate respectively and connect in two base angle departments of tripod, are located to be equipped with a plurality of supplementary steamboats on the tripod base between two little synchronous pulleys.

Preferably, the rhizoma corydalis grabbing and collecting mechanism comprises an excavating device for excavating the rhizoma corydalis, two soil breaking devices for breaking soil blocks carried on the excavated rhizoma corydalis and a chain plate transmission device for conveying the broken soil, three transmission shafts in the chain plate transmission device are arranged in a V shape, wherein one transmission shaft is connected with a second driving device for driving the transmission shaft to rotate through a first belt, each first chain wheel arranged on each transmission shaft is connected through a second chain, a second chain wheel for driving the second chain and the first chain wheel on the transmission shaft to be in chain transmission is arranged right above the transmission shaft at the lowest point in the three transmission shafts arranged in the V shape, and the two soil breaking devices and one soil breaking device are in synchronous transmission through the second belt.

Preferably, the digging device for digging rhizoma corydalis comprises a plurality of digging shovels and a plurality of fixing plates for fixing the digging shovels, the fixing plates are uniformly arranged at the front end of the feed inlet of the chain plate transmission device, each digging shovel is in one-to-one correspondence with each fixing plate and is detachably connected with each fixing plate, and the front end of each digging shovel is of a convex arc structure.

Preferably, the two soil crushing devices comprise a large crushing roller and a small crushing roller, and protrusions for crushing soil are arranged on the large crushing roller and the small crushing roller, and the large crushing roller is positioned in front of the small crushing roller.

Preferably, the chain plate transmission device is arranged below the large crushing roller and the small crushing roller, a sieve hole for enabling the crushed soil to fall is formed in a chain plate of the chain plate transmission device, and a first baffle plate for preventing the upwardly conveyed rhizoma corydalis from falling is mounted on a side edge of the chain plate transmission device.

Preferably, the harvester body comprises a front frame and a rear frame, the screening mechanism is arranged on the front frame, the crawler-type traveling device and the two rear rollers in the harvester traveling mechanism are arranged on the rear frame, the front rollers are arranged on the front frame, the front end of the front frame is rotatably connected with the rhizoma corydalis grabbing and collecting mechanism, and the rear frame is provided with a hand-held handle.

Preferably, the screening mechanism is arranged below the front frame and comprises a U-shaped frame connected with the front frame, a screen with a second baffle, a rocker, an eccentric wheel and a third driving device, the screen is positioned in the U-shaped frame and is hinged to a plurality of vertical plates symmetrically arranged on the outer side of the U-shaped frame, a plurality of rocker shafts are hinged between two symmetrically arranged vertical plates, one rocker shaft close to one side of the third driving device is connected with the lower end of the rocker, the high end of the rocker is hinged to a wheel disc of the eccentric wheel, and the eccentric wheel is in key connection with an output shaft of the third driving device arranged on the U-shaped frame.

Preferably, two layers of screen meshes are arranged in the U-shaped frame, and the aperture of the two layers of screen meshes is reduced from top to bottom in sequence.

Preferably, a limiting wheel used for limiting the digging depth of the digging shovel is further arranged above the digging device, and the limiting wheel is fixedly connected with the digging shovel bottom plate 4 through a connecting rod.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention not only can solve the problems of large volume and heavy weight of the rhizoma corydalis harvester in the prior art, but also can solve the problems of incomplete soil crushing, low medicine-soil separation rate and inconvenient machine use in the prior art.

2. The harvester walking mechanism is provided, the harvester walking mechanism combines the advantages of two walking modes of a common rubber wheel type walking mode and a conventional crawler type walking mode, the size of the whole harvester is small, the turning radius is small, the operation and the control are flexible, meanwhile, the harvester walking mechanism can walk to a working place through a crawler belt without the consignment of a truck, and is assisted by four idler wheels for supporting, so that the harvester walking mechanism can ensure that the harvester walking mechanism has larger driving force and can turn flexibly; the front part of the harvester is provided with a rhizoma corydalis grabbing and collecting mechanism which integrates a digging device, a soil crushing device and a chain plate transmission device. The rhizoma corydalis in the soil can be effectively excavated, the two-stage soil smashing device can effectively smash the massive soil without large-area soil blockage, the rhizoma corydalis after the soil smashing is conveyed to the screening mechanism by the conveying device, the massive soil leaks down from sieve holes on the chain plates in the conveying process, the soil which is not removed is conveyed to the screening mechanism along with the rhizoma corydalis, and the impurities which are not removed in the rhizoma corydalis and the soil are further separated.

3. The transmission shaft in the chain plate transmission device is arranged in a V shape, and the chain transmission is carried out through the first chain wheel, the second chain wheel and the second chain: firstly, in order to prolong the screening track of the rhizoma corydalis on the chain plate transmission device, the rhizoma corydalis is screened more sufficiently, secondly, the transverse size of the chain plate transmission device can be reduced through the design, the longitudinal size of the chain plate transmission device is increased, the space utilization rate is improved, the structure of the whole machine is more compact, the transmission angle of the rhizoma corydalis and soil block mixture of the soil breaking device in the soil breaking stage can be reduced through the design, and the phenomenon that the large rhizoma corydalis and soil block mixture which is not broken in time due to the fact that the transmission angle is too large rolls down to cause blockage is avoided.

Drawings

FIG. 1 is a top view of the small self-propelled rhizoma corydalis harvester of the present invention;

FIG. 2 is a front view of the small self-propelled rhizoma corydalis harvester of the present invention;

FIG. 3 is a schematic view of the sieving mechanism of the small self-propelled rhizoma corydalis harvester of the present invention;

fig. 4 is a partially enlarged view of the rhizoma corydalis seizing and collecting mechanism of the small self-propelled rhizoma corydalis harvester of the present invention.

In the figure: 1. digging shovel, 2, limiting wheel, 3, connecting rod, 4, fixing plate, 5, protrusion, 6, large crushing roller, 7, second chain, 8, second driving device, 9, chain plate, 10, first baffle, 11, front frame, 12, third driving device, 13, screen, 14, second baffle, 15, rotating shaft, 16, large synchronous belt wheel, 17, small synchronous wheel, 18, auxiliary small wheel, 19, crawler belt, 20, fixing frame, 21, first driving device, 22, speed reducer, 23, roller, 24, rear frame, 25, distribution box, 26, generator, 27, hand handle, 28, U-shaped frame, 29, rocker shaft, 30, riser, 32 rocker, 33. eccentric wheel.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the technical scheme in the embodiment of the invention is clearly and completely described below with reference to the attached drawings in the embodiment of the invention.

In the description of the present invention, it should be understood that the terms used in the description of the present invention for the orientation, such as "height", "length", "width", "front surface", are based on the description when the body is vertically placed, i.e., perpendicular to the ground, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Examples

As shown in fig. 1-4, the embodiment of the present invention is realized by adopting the following technical scheme, the small-sized self-propelled rhizoma corydalis harvester comprises a harvester body, a rhizoma corydalis seizing and collecting mechanism arranged at the front end of the harvester body, a screening mechanism arranged on the harvester body, and a harvester walking mechanism, wherein the harvester walking mechanism comprises four rollers 23 arranged on the harvester body and crawler-type walking devices symmetrically arranged at two sides of the harvester body; the crawler type walking device comprises

The fixed frame 20 is rotationally connected with a large synchronous belt wheel 16 arranged on the harvester body through a rotating shaft 15, and the large synchronous belt wheel 16 is connected with a small synchronous belt wheel 17 arranged on the fixed frame 20 through a crawler belt 19;

and the first driving device 21 is arranged on the harvester body and is driven by the chain of the large synchronous belt pulley 16 through a first chain.

Preferably, the fixed frame 20 is a tripod, the large synchronous pulley 16 is rotatably connected with a top corner of the tripod through the rotating shaft 15, the number of the small synchronous pulleys 17 is two, the two small synchronous pulleys 17 are respectively rotatably connected with two bottom corners of the tripod, and a plurality of auxiliary small wheels 18 are arranged on the bottom side of the tripod between the two small synchronous pulleys 17.

The harvester that designs should be for wheeled walking mode in order to reduce the complete machine size, consider simultaneously that ordinary rubber tire and soil area of contact are little, pressure is great, can produce darker indentation to soil at the walking in-process, and, if adopt conventional crawler-type walking mode, its weight size can rise by a wide margin, and turning radius is great, also can cause great damage to the farmland, consequently, three angie type athey wheels are adopted in this design, its bearing capacity is big, can work in some extreme environment, its overall dimension is little simultaneously, light in weight, it is with low costs, the advantage of having combined two kinds of walking modes of ordinary rubber wheeled and conventional crawler-type.

Furthermore, the rhizoma corydalis snatching and collecting mechanism comprises an excavating device for excavating the rhizoma corydalis, two soil breaking devices for breaking soil blocks carried on the excavated rhizoma corydalis and a chain plate transmission device for conveying the broken soil, three transmission shafts in the chain plate transmission device are arranged in a V shape, wherein one transmission shaft is connected with a second driving device 8 for driving the transmission shaft to rotate through a first belt, each first chain wheel arranged on each transmission shaft is connected through a second chain 7, a second chain wheel for enabling the second chain 7 to be in chain transmission with the first chain wheel on the transmission shaft is arranged right above the transmission shaft at the lowest point in the three transmission shafts arranged in the V shape, and the two soil breaking devices and one soil breaking device and the second driving device 8 are in synchronous transmission through a second belt.

Further, the digging device for digging rhizoma corydalis comprises a plurality of digging shovels 1 and a plurality of fixing plates 4 for fixing the digging shovels, the fixing plates 4 are uniformly arranged at the front ends of the feed inlets of the chain plate transmission devices, the digging shovels 1 are in one-to-one correspondence with the fixing plates 4 and are detachably connected, and the front ends of the digging shovels 1 are of convex arc structures.

Furthermore, the two soil crushing devices comprise a large crushing roller 6, a small crushing roller and bulges 5 which are arranged on the large crushing roller 6 and the small crushing roller and are used for crushing soil, the large crushing roller 6 is positioned in front of the small crushing roller, the large crushing roller is arranged in front of the large crushing roller, the gap between crushing rings of the large crushing roller is large, the soil is conveniently crushed preliminarily, and the soil is prevented from being adhered; after the small crushing roller is arranged, the gap between the crushing rings of the small crushing roller is smaller, and soil is crushed again, so that the soil is crushed into smaller particles, the crushing is more sufficient, and the crushing efficiency is improved.

Further, the chain plate transmission device is arranged below the large crushing roller 6 and the small crushing roller, a sieve hole for enabling crushed soil to fall is formed in a chain plate 9 of the chain plate transmission device, and a first baffle 10 for preventing the upwardly conveyed rhizoma corydalis from falling is installed on the side edge of the chain plate 9 of the chain plate transmission device.

Further, the harvester body comprises a front frame 11 and a rear frame 24, the screening mechanism is arranged on the front frame 11, a guide plate for receiving a chain plate transmission device to convey rhizoma corydalis and sending the rhizoma corydalis into the screening mechanism is integrally formed on the front frame 11, a crawler-type traveling device and two rear rollers 23 in the harvester traveling mechanism are arranged on the rear frame 24, the front rollers 23 are arranged on the front frame 11, the front end of the front frame 11 is rotatably connected with the rhizoma corydalis grabbing and collecting mechanism, and a hand handle 27 is arranged on the rear frame 24.

Further, the screening mechanism is arranged below the front frame 11, and the screening mechanism comprises a U-shaped frame 28 connected with the front frame, a screen 13 with a second baffle plate 14, a rocker 32, an eccentric 33 and a third driving device 12, the screen 13 is positioned in the U-shaped frame 28 and is hinged with a plurality of vertical plates 30 symmetrically arranged on the outer side of the U-shaped frame 28, a plurality of rocker shafts 29 are hinged between two symmetrically arranged vertical plates 30, one rocker shaft 29 close to one side of the third driving device 12 is connected with the lower end of the rocker 32, the high end of the rocker 32 is hinged on a wheel disc of the eccentric 33, and the eccentric 33 is connected with an output shaft key of the third driving device 12 arranged on the U-shaped frame 28.

Furthermore, two layers of screens 13 are arranged in the U-shaped frame 28, and the apertures of the screens 13 are sequentially reduced from top to bottom, because the smallest radial dimension of the rhizoma corydalis is generally 0.5cm, and the largest radial dimension is 2.5 cm. The first layer of sieve mesh aperture is 20mm, makes large granule rhizoma corydalis and tiny granule separately, makes things convenient for the pharmacy peasant to sell respectively. The aperture of the second layer of screen mesh is 5mm, so that rhizoma corydalis can not fall to the ground, smaller soil particles screened by vibration can leak down, and the weight of soil in the screen mesh is reduced.

Furthermore, a limiting wheel 2 used for limiting the soil penetration depth of the digging shovel 1 is further arranged above the digging device, and the limiting wheel 2 is fixedly connected with the digging shovel bottom plate 4 through a connecting rod 3.

The working principle is as follows:

when rhizoma corydalis is harvested, a first driving device 21 (a diesel engine) is started, power is transmitted to a large synchronous belt wheel 16 through a speed reducer 22 and a first chain, the large synchronous belt wheel 16, a small synchronous belt wheel 17, an auxiliary small wheel 18, a crawler 19 and a tripod 20 form a small triangular crawler type walking device together, the large synchronous belt wheel 16 transmits the power to the crawler 19, and the crawler 19 drives the whole vehicle to move forwards. The first drive unit 21 is a diesel engine and is connected to a generator 26 for converting mechanical energy into electrical energy for storage in a distribution box 25, which distribution box 25 supplies the second drive unit 8 and the third drive unit 12. Second drive arrangement 8 sets up three transmission shaft energy supplies for big crushing roller 6 simultaneously and being the V type through second belt and first belt transmission, because second chain 7 establishes and is being the V type and sets up on the three transmission shaft and be provided with the second belt between big crushing roller 6 and the little crushing roller, has consequently realized the rotation of big crushing roller 6 and little crushing roller and the transmission of second chain 7. The third driving device 12 drives the rocker shaft 29 arranged transversely between the risers 30 to rotate through the rocker 32, and drives the screen 13 to rock left and right due to the fact that the screen 13 is hinged to the risers 30. When the whole vehicle moves forward, the digging shovel 1 is inserted into soil, the rhizoma corydalis and the soil are dug out together and are conveyed into the chain plate 9 to be conveyed upwards, part of the soil is graded and crushed into small blocks by the large crushing roller 6 and the large crushing ring 5 arranged on the small crushing roller in the conveying process, and the small blocks fall to the ground through sieve holes of the chain plate 9 to realize primary screening. The rhizoma corydalis and the residual soil fall into the screen 13 when being transmitted to the tail end of the chain plate 9, and the screen 13 shakes left and right to enable the soil to be broken into smaller particles to fall from the meshes, so that secondary screening is completed.

The above disclosure is only for the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.