Leymus chinensis seed low-loss high-cleanliness separating screen
By designing a multi-layered screen structure and adjustable screen plates, combined with vibration and wind power, efficient sorting of sheepgrass seeds was achieved, solving the problems of large losses and low purity during the harvesting process, and improving harvesting efficiency and purity.
Patent Information
- Application Number
- CN202520416931.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Sheepgrass seeds suffer significant losses and low purity during harvesting, making them difficult to effectively separate and clean.
A sorting screen comprising a top screen, a middle screen, and a bottom screen was designed. The top screen consists of a corrugated screen and a woven screen, the middle screen consists of small sections of corrugated screen and a woven screen, and the bottom screen is a fish scale screen. Through multiple serrated screen plates and adjustable adjustment strips, combined with vibration and wind power, efficient sorting is achieved.
It effectively reduces harvesting losses of sheepgrass seeds, improves purity, reduces impurity content, and lowers the labor intensity of subsequent processing, thus solving the problem of sheepgrass seed harvesting.
Smart Images
Figure CN223915947U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural equipment technology, specifically to a low-loss, high-purity sorting sieve for sheepgrass seeds. Background Technology
[0002] Leymus chinensis is an important dominant species in meadow steppes and typical steppes in the eastern part of the Eurasian steppe region. It is widely distributed in the natural grasslands of eastern Inner Mongolia and Northeast China, and is also an important cultivated forage grass. Leymus chinensis is not only rich in nutrients and has high feed value, but it is also readily consumed by livestock. Furthermore, it possesses strong biological characteristics such as cold resistance, drought resistance, salt and alkali tolerance, and tolerance to poor soil conditions. Its rhizomes have a strong penetrating and invasive ability, and play a significant role in soil stabilization. It is an excellent plant for soil and water conservation and plays a vital role in the ecological restoration of degraded grasslands. In recent years, it has become an important grass species for grassland ecological restoration, promoting an increase in the area planted with seeds.
[0003] Leymus chinensis has a spike-like inflorescence, with an erect single spike growing at the top of the stem, and the seeds growing on the spike. Leymus chinensis seeds are slender and needle-like, consisting of a caryopsis and a lemma. The caryopsis is enclosed by the lemma, which is lanceolate. The weight of 1000 seeds is approximately 2 grams. Due to the irregular shape, light weight, awns, small size, low drift velocity, and similar physical properties between the seeds and broken stem fragments, the seed mixture is difficult to separate and clean during harvesting and cleaning using a combined pneumatic screen and mechanical equipment, resulting in significant losses and low purity, thus posing considerable challenges to harvesting and cleaning. Therefore, to reduce seed loss and improve seed purity during combined harvesting of Leymus chinensis seeds, it is necessary to improve the structure and configuration of the sorting screen. Utility Model Content
[0004] The purpose of this invention is to provide a low-loss, high-purity sorting sieve for sheepgrass seeds, thereby reducing seed loss and improving seed purity during joint harvesting of sheepgrass seeds.
[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:
[0006] A low-loss, high-cleanliness sorting sieve for sheepgrass seeds includes a sorting sieve body and a top sieve, a middle sieve, and a bottom sieve installed sequentially from top to bottom on the sorting sieve body. The top sieve includes a first sieve and a second sieve arranged closely together. The first sieve is a wave-shaped sieve. The second sieve includes a front sieve and a rear sieve. The front sieve includes multiple serrated sieve plates arranged at intervals along the cleaning direction and multiple adjustable long strips arranged parallel to the cleaning direction at adjustable angles. The rear sieve is a woven sieve. The middle sieve includes short sections of wave-shaped sieve and a rear woven sieve arranged closely together. The bottom sieve is a fish-scale sieve.
[0007] Furthermore, the upper ends of both sides of each adjustment strip are hinged to the front screen frame via a top rotating shaft, and the lower ends are hinged to the connecting strip on the corresponding side via a lower shaft. The connecting strip on each side is bolted to the front screen frame on the corresponding side.
[0008] Furthermore, the number of serrated sieve plates is 47, and the number of adjustable strip plates is 26.
[0009] Furthermore, the spacing between adjacent serrated screen plates is 15mm, and the spacing between the top rotating shafts of adjacent adjusting strips is 30mm.
[0010] Furthermore, the aperture of the rear sieve is 25mm × 25mm.
[0011] Furthermore, the aperture of the woven screen is 8mm × 14mm.
[0012] Furthermore, a guide plate is installed on the first screen.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] This application provides a low-loss, high-purity sorting device for harvesting Leymus chinensis seeds. Installed on a Leymus chinensis seed combine harvester, this device, through structural innovation of the sorting sieve, effectively reduces harvesting losses, improves the purity of harvested Leymus chinensis seeds, reduces the impurity content of the Leymus chinensis seed mixture, and lowers the labor intensity of subsequent processing. It can solve the problem restricting Leymus chinensis seed harvesting in my country and provide equipment support for Leymus chinensis seed harvesting. Attached Figure Description
[0015] Figure 1 The diagram shown is a schematic diagram of the sorting sieve structure according to an embodiment of this application;
[0016] Figure 2 The diagram shown is a schematic diagram of the layer structure of the top sieve, middle sieve, and bottom sieve in an embodiment of this application.
[0017] Figure 3 The diagram shown is a schematic representation of the top-layer sieve in an embodiment of this application.
[0018] Figure 4 The diagram shown is a schematic representation of the structure of the middle and bottom screens in an embodiment of this application.
[0019] In the diagram, the first screen is 1, the guide plate is 2, the sorting screen body is 3, the second screen is 4, the front screen is 41, the rear screen is 42, the bottom screen is 5, the middle screen is 6, the serrated screen plate is 7, the adjusting strip is 8, the lower shaft is 9, the top rotating shaft is 10, the connecting strip is 11, the front screen frame is 12, the bolt is 13, the rear woven screen is 14, the fish scale screen is 15, and the small section wave screen is 16. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0022] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.
[0023] Please see Figures 1-4 The diagram shows the structure of an embodiment provided by this utility model.
[0024] This embodiment provides a low-loss, high-cleanliness sorting sieve for sheepgrass seeds, including a sorting sieve body 3 and a top sieve, a middle sieve 6, and a bottom sieve 5 installed sequentially from top to bottom on the sorting sieve body 3. The top sieve includes a first sieve 1 and a second sieve 4 arranged closely together. The first sieve 1 is a wave-shaped sieve. The second sieve 4 includes a front sieve 41 and a rear sieve 42. The front sieve 41 includes multiple serrated sieve plates 7 arranged at intervals along the cleaning direction and multiple adjustable long strips 8 arranged parallel to the cleaning direction with adjustable angles. The rear sieve 42 is a woven sieve.
[0025] The middle layer screen 6 includes a small section of wave screen 16 and a rear woven screen 14 arranged closely together at the front and back.
[0026] The bottom sieve 5 is a fish scale sieve 15.
[0027] The operation process of the sorting screen provided in this application is as follows: After the field grass is harvested and threshed, the mixture falls onto the first screen 1 at the front end of the top screen. Driven by the vibration mechanism of the sorting screen, the grass mixture falling onto the wave-shaped screen is conveyed to the second screen 4 behind it. After passing through the second screen 4, it falls into the middle screen 4 and the bottom screen 5 for sorting.
[0028] It should be noted that the number of serrated screen plates 7 is 47, and the number of adjusting strip plates 8 is 26. The adjusting strip plates are parallel to each other. By swinging the connecting strips 11 connected to the sides, the 26 adjusting strip plates 8 can be rotated along the 26 top rotating shafts 10 respectively, thereby changing the angle of the adjusting strip plates and making the airflow more conducive to blowing away light impurities. The set adjusting strip plates are locked to the front screen frame 12 at the rear end with bolts 13. Specifically, the upper ends of both sides of each adjusting strip plate 8 are hinged to the front screen frame 12 through the top rotating shaft 10, and the lower ends are hinged to the corresponding side connecting strips 11 through the lower shaft body 9. Each side connecting strip 11 is connected to the corresponding side of the front screen frame with bolts 13. The adjusting strip plate 8 includes the top rotating shaft 10 at the upper end and multiple baffles spaced apart at the lower end of the top rotating shaft 10. The baffles are spaced apart with serrated screen plates, and the top rotating shaft 10 passes through the serrated screen plates and is rotatably connected. In addition, the spacing between adjacent serrated screen plates is set to 15mm, and the spacing between the rotating shafts at the top of the long strips is adjusted to 30mm. By using serrated screen plates and adjusting the long strips in an alternating arrangement in the front screen, the transmittance is relatively high. The cleaning wind speed is enhanced by the adjustment of the long strips, which strengthens the wind speed and facilitates the backward blowing of the mixture. In addition to the material that passes through the front screen 41 and falls into the lower screen, some long stems, sheep grass ears, and light impurities continue to be conveyed backward under the action of the vibrating screen body shaking, the serrations at the top of the serrated screen plates, and the wind force, and will not flow back. The conveyed material reaches the rear screen 42, which is a woven screen with a high transmittance. The woven screen has a aperture of 25mm×25mm and is made of crimped steel wire. Due to the high transmittance of the woven screen, ears and short stems that flow through the rear screen fall into the re-dewatering conveying chamber, while long sheep grass stems and fine impurities are discharged from the tail of the cleaning screen under the action of the vibrating screen body shaking and the wind force.
[0029] It should be noted that the vibration mechanism and other adjacent structures such as the re-extraction conveying chamber all adopt existing structures, so they will not be described in detail here.
[0030] It should be noted that the middle sieve mainly separates the sheepgrass mixture that falls through the top sieve. The middle sieve includes a small section of corrugated sieve 16 at the front end and a woven sieve 14 at the rear end. The corrugated sieve evenly disperses the sheepgrass seed mixture that falls from the front end of the top sieve and then conveys it to the rear woven sieve under the shaking action of the vibrating sieve body. The woven sieve at the rear end has elongated holes with a hole size of 8mm×14mm. Under the action of shaking and airflow, the sheepgrass mixture continues to be separated by the middle sieve. At this time, sheepgrass seeds, broken stems, etc. fall through the woven sieve into the lower sieve, while the unsorted spikelets, short stems, and other mixture materials continue to move backward and fall into the re-threshing conveying chamber from the tail of the middle sieve for re-threshing.
[0031] It should be noted that the bottom sieve primarily mixes and further sorts the Leymus chinensis seeds that fall from the middle sieve. The bottom sieve uses a fish-scale sieve 21 for sorting. By adjusting the mesh size of the fish-scale sieve, the Leymus chinensis seeds can pass through smoothly while minimizing the passage of broken stems, thus improving the purity of the Leymus chinensis seeds. After being sieved, the Leymus chinensis seed mixture falling onto the bottom sieve is further sieved. The seeds pass through the bottom sieve and fall into the seed conveying chamber, and are then transported to the seed box. The broken stems that pass through the upper surface of the bottom sieve fall into the re-threshing conveying chamber for further re-threshing.
[0032] In addition, a guide plate 2 is installed on the first screen.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A low-loss, high-purity sorting sieve for sheepgrass seeds, characterized in that, It includes a sorting screen body (3) and a top screen, a middle screen (6) and a bottom screen (5) installed sequentially from top to bottom on the sorting screen body (3). The top screen includes a first screen (1) and a second screen (4) arranged closely together. The first screen (1) is a wave-shaped screen. The second screen (4) includes a front screen (41) and a rear screen (42). The front screen (41) includes multiple serrated screen plates (7) arranged at intervals along the cleaning direction and multiple adjustable long strips (8) arranged at intervals perpendicular to the cleaning direction and with adjustable angles. The rear screen (42) is a woven screen. The middle layer screen (6) includes a small section of wave screen (16) and a rear woven screen (14) arranged closely together; the bottom layer screen (5) is a fish scale screen (15).
2. The low-loss, high-purity sorting sieve for sheepgrass seeds according to claim 1, characterized in that, The upper ends of each adjustment strip (8) are hinged to the front screen frame (12) via the top rotating shaft (10), and the lower ends are hinged to the corresponding side connecting strip (11) via the lower shaft (9). The connecting strip (11) on each side is connected to the corresponding side front screen frame via bolts (13).
3. The low-loss, high-purity sorting sieve for sheepgrass seeds according to claim 2, characterized in that, The number of the serrated sieve plates (7) is 47, and the number of the adjustable strip plates (8) is 26.
4. The low-loss, high-purity sorting sieve for sheepgrass seeds according to claim 3, characterized in that, The spacing between adjacent serrated sieve plates (7) is 15 mm, and the spacing between the top rotating shafts (10) of adjacent adjusting strips (8) is 30 mm.
5. The low-loss, high-purity sorting sieve for sheepgrass seeds according to claim 4, characterized in that, The aperture of the rear sieve (42) is 25mm × 25mm.
6. The low-loss, high-purity sorting sieve for sheepgrass seeds according to claim 5, characterized in that, The aperture of the rear woven screen (14) is 8mm × 14mm.
7. The low-loss, high-purity sorting sieve for sheepgrass seeds according to claim 6, characterized in that, A guide plate (2) is installed on the first screen (1).