WO2019091330A1 - 小杂筛在上的网带平回筛及其进行粮食除杂的方法 - Google Patents

小杂筛在上的网带平回筛及其进行粮食除杂的方法 Download PDF

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Publication number
WO2019091330A1
WO2019091330A1 PCT/CN2018/113568 CN2018113568W WO2019091330A1 WO 2019091330 A1 WO2019091330 A1 WO 2019091330A1 CN 2018113568 W CN2018113568 W CN 2018113568W WO 2019091330 A1 WO2019091330 A1 WO 2019091330A1
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Prior art keywords
screen
small
mesh belt
mesh
sieve
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PCT/CN2018/113568
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English (en)
French (fr)
Inventor
刘全义
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刘全义
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Publication of WO2019091330A1 publication Critical patent/WO2019091330A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B07B1/36—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro in more than one direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/10—Screens in the form of endless moving bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4663—Multi-layer screening surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • B07B1/52—Cleaning with brushes or scrapers
    • B07B1/522—Cleaning with brushes or scrapers with brushes
    • B07B1/524—Cleaning with brushes or scrapers with brushes the brushes being rotating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • B07B1/54—Cleaning with beating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens

Definitions

  • the invention relates to a large-scale grain cleaning and cleaning device, in particular to an ultra-large grain cleaning and impurity removing device for removing large, medium and small impurities with an processing capacity of 100-500 tons per hour, and the traditional first Compared with the cleaning of the large mesh belt screen, the invention is more suitable for the food with less impurities or has been cleaned up.
  • the traditional equipment for handling large miscellaneous materials is mainly mesh belt screen and drum screen.
  • the output of mesh belt screen is generally 100-500t/h, and the drum screen is 50. -150t/h, the equipment for processing small and medium miscellaneous is mainly vibrating screen and rotary screen.
  • the output is generally 10-50t/h, and the medium and small miscellaneous screen with the processing capacity above 50t/h is regarded as an advanced large-scale equipment.
  • the energy consumption for processing 200 tons of raw grain needs 23kW or more. If you add a hoist, the energy consumption is higher. If you process more than 200 tons of raw grain per hour, you will need more complicated configuration and higher energy consumption.
  • the equipment also needs to be connected with accessories such as splitter and the cost is higher. After the grain harvest comes back, because it can't be put into the warehouse in time, the insects eat, rat, bird, and mold, and lose more than 10% of the harvested grain, solving the initial processing speed of grain is an urgent problem to be solved in the development of the country and the grain industry.
  • the traditional cleaning of large mesh belts is composed of a feeding hopper, a mesh belt conveying mechanism, a cleaning mechanism and a transmission system. It mainly removes large debris such as straw heads, long straws, bricks, and clods. After the harvest containing the grain naturally falls to the sieve surface, since the grain size of the grain is much smaller than the sieve hole, it falls through the sieve hole and flows to the grain discharge port; and if the particle size or length of the large impurity is larger than the sieve hole, it cannot or cannot pass through the sieve hole. On the screen surface, large impurities are transported to the impurity discharge port along with the advancement of the conveyor belt, thereby separating small particle size harvests such as grain and large impurities.
  • the lower layer is also very susceptible to clogging in the secondary screening.
  • the mesh belt screens are intermittent work, which is used for cleaning up large impurities. It is not suitable for cleaning and mixing. Because the mesh is smaller and more likely to be blocked, it is not used in the industry for cleaning and cleaning.
  • the traditional cleaning sieve output is generally 30-50 tons / hour, the output of 100 tons / hour of flat cleaning screen only a few manufacturers can produce.
  • the traditional cleaning screen surface is relatively fixed with the screen box, and only the flat back movement is carried out. Some small or broken raw grain is easily stuck in the sieve hole after work, causing the screen surface to be blocked and unable to be cleaned by itself.
  • the screen cleaning mechanism is not Ideally, the worker must clean the sieve surface once a day to clear the sieve hole, which is time consuming and laborious, otherwise it will affect the screening effect.
  • the object of the present invention is to provide a mesh belt flat return screen with strong processing capacity, large processing capacity, low construction height, low construction cost, self-clearing and method for removing impurities.
  • the mesh screen is arranged on the upper screen, and the composition comprises: a sieve frame, wherein the sieve frame is connected to the screen box by a boom or a rocker or a swing rod, and the screen box is provided with a set of small mesh belts.
  • a sieve and a large medium mesh screen wherein the small mesh screen and the large medium mesh screen are provided with a flat return mechanism, and the small mesh screen has a slippery slide under the screen surface
  • the large medium mesh screen and/or the small mesh screen have a rib, and the bottom of the waste slide is provided with a discharge mechanism.
  • the small hybrid screen is flatly screened on the upper mesh belt, and the rib is a polymer barrier plate fixed on both sides of the mesh belt, and the polymer barrier is an s-shaped or zig-shaped elastic belt or a A pair of butted baffles or a set of staggered baffles.
  • the small miscellaneous sieve is screened on the upper mesh belt, and the small miscellaneous mesh belt sieve is a group, and the small miscellaneous mesh belt sieve is equipped with an inlet distribution device, and the small miscellaneous mesh belt sieve
  • the feeding device of the large medium mesh screen is connected through the guiding trough.
  • the small miscellaneous sieve is flatly sifted on the upper mesh belt, the spurted slide plate is inclined toward the middle of the mesh belt screen, and the bottom of the smashing slide plate has a spiral discharge device; or
  • the side box plate of the screen box is inclined, the out-of-mesh slide plate is connected to the miscellaneous passage, and the out-of-skid slide plate is a set of inclined plates arranged opposite to each other with an inclination angle of 4-15 degrees, and the inclined plate is formed.
  • Concave surface, each layer of small miscellaneous sieve corresponds to 1-3 grain inlets.
  • the small miscellaneous sieve is flatly screened on the upper mesh belt, and the large and medium miscellaneous mesh belt screen is provided with a guiding swash plate, and the guiding swash plate is inclined along the mesh belt, and the high-end is located in the grain feeding.
  • the large medium mesh screen comprises a set of metal screens arranged in a row or a wire formed by an endless conveyor belt or a stamped screen endless belt, the large screen having a screen angle of 0 At -4 degrees, the large and medium mesh screen meshing holes are 1.5 times larger than the sieved grain.
  • the small miscellaneous screen is flatly sifted on the upper mesh belt, and the small miscellaneous mesh screen comprises a set of metal screens arranged in sequence or an endless belt formed by wire braiding or an endless belt of a stamped screen surface.
  • the small mesh screen comprises a composite screen surface, the small mesh screen has a screen angle of 0-5 degrees, and the small mesh screen has a sieve hole smaller than 0.8 times of the sieved grain.
  • the small mesh screen is flatly screened on the upper mesh belt, and the endless conveyor belt is sleeved on the rollers at both ends, the roller has a blocking edge, and the roller on one side is connected to the driving mechanism.
  • the working surface of the drum and the idler has a hanging glue, and the small mesh belt screen and/or the large medium mesh screen is equipped with a cleaning roller or a cleaning brush.
  • the compound movement mode of the movement puts the material of the mixture including grain after threshing into the small miscellaneous cleaning sieve, and rolls the grain through the bumps and the back movement in the process of straightening the net, and the grain moves under the block of the rib.
  • Small impurities such as dust, dust, straw, fines, etc., large-sized sieve materials including grain, enter the large and medium mesh screen, and the sieve material passes through the mesh belt in the large and medium mesh screen In the process of going straight, the bumps and the backs of the movement are rolled, the food is screened, and collected; the large objects in the screen are blocked by the ribs and introduced into the collector.
  • the small miscellaneous sieve is used for the method of removing the impurities in the upper mesh belt, and the plurality of small mesh belt screens are used to distribute the materials into the small mixed sieve surfaces of different layers through the inlet distribution device.
  • the inlet distribution device has a distribution trough, and the bottom end of the distribution trough has a set of grain inlets, and each layer of small miscellaneous sieves corresponds to 1-3 of the food inlets.
  • the small mesh sieve on the mesh screen of the present invention is more suitable for small mixed impurities and large mixed comparison. Less food types, especially suitable for grain processing before and after warehousing.
  • the invention has high processing yield and the same floor space, and the single-layer high-treatment rice can produce 50-300 tons per hour, and can customize 2000 tons of extra large sieve according to the special needs of customers.
  • the screen surface of the present invention performs linear motion, and the screen box performs a flat motion to form a compound motion mode. The composite motion enables the screen surface to have a self-cleaning function.
  • the idler roller is arranged under the sieve surface of the invention to prevent the sieve surface from sinking and deforming.
  • the traditional cleaning screen needs to be equipped with two types of screens to deal with large and medium and small impurities. It requires several floors of work towers, and there are many suction points. It is necessary to configure multiple pulse dust collectors. The configuration is cumbersome and the hoist is high. Above 30 meters, the energy consumption required for equipment operation is high, so the overall cost is high.
  • the cleaning screen of the invention can remove large impurities and remove small and medium impurities, and a cleaning screen can replace the traditional multiple cleaning screens to complete the wages, and does not require a higher working tower, which reduces the height of the grain lifting and simplifies.
  • the configuration completes multiple screening processes in a closed space, which saves energy consumption and reduces costs, improves screening quality, reduces pollution and backsocks.
  • the small miscellaneous mesh belt screen of the invention has a slanting and outgoing skid plate below the sieve surface, so that the sieve material can be discharged in time, and the sieve residue falls from the small miscellaneous mesh belt to the large and medium mesh screen, and the sieve in the large and medium mesh screen
  • a large miscellaneous sifting is carried out, and the large and small miscellaneous and the Longview are quickly outputted in three ways, and the sieving effect is effectively improved in a relatively short period of time.
  • the large and medium mesh belt screen of the invention may be provided with a conveying plate, wherein the conveying plate is a set of parallel guiding swash plates, which can effectively lengthen the length of the sifting and improve the screening quality, and when the swash plate is used,
  • the large-medium mesh belt screen located in the lower layer is provided with a large impurity output mechanism in the outlet direction. According to the situation of sieving different plant straws, it is sometimes possible to use a discharge swash plate which discharges to both sides to prevent clogging in the secondary screening process.
  • the screen surface of the mesh belt screen of the present invention has various forms, which may be formed by sequentially arranging metal sieve sheets, or formed by braiding of wires, or stamping. If a sieve piece hinged at one end is used, when running to the lower layer, Open the sieve surface so that the sieve material can be discharged smoothly, avoiding internal blockage. Different types of sieve surface can be used for different types of raw grain screening requirements.
  • the mesh belt screen of the invention combines a circular motion during travel to form a spiral track of grain, which significantly improves the screening effect. It cannot be ignored that in the flat back movement, the grain will inevitably roll to both sides, in order to In order to avoid the mixing of the sieve residue, the large medium mesh screen and/or the small mesh screen have a rib, and the screen surface of the invention adopts an s-shaped rib or a zigzag rib, and the rib is adopted.
  • the polymer barrier plate has elasticity in the longitudinal direction - that is, ductility, and can adapt to the linear or curved movement of the screen surface: it can effectively block the grain from scattering outside the screen surface during the plane movement, and bends When it is centered around the center, it will rotate through the drum with the screen surface. Since the s-shaped rib or the zigzag rib has a relatively large occupation width, the rib of the present invention may also be discontinuous.
  • the present invention provides a cross-section or overlapping rib, when bending,
  • the upper part of the ribs can be separated and unfolded from each other, so that the effect of blocking during the plane sieving movement and the circumferential expansion when bending can be achieved, so that the rib can smoothly rotate through the drum along with the screen surface.
  • the large and medium mesh screen is equipped with rollers and/or small under the sieve surface.
  • the idler belt is equipped with a roller under the sieve surface, and the distance between the rollers is generally 0.3-0.8 meters.
  • the screen angle of the large medium mesh screen is 0-4 degrees, and the sieve hole of the large medium mesh screen is more than 1.5 times the grain size;
  • the screen angle of the mesh screen is 0-5 degrees, and the sieve hole of the small mesh belt sieve is smaller than 0.8 times of the grain size, so that the grain screening effect is the best.
  • the small miscellaneous mesh belt screen of the invention comprises a composite screen surface, comprising a rigid skeleton screen surface of a spiral steel wire and a dense mesh screen surface, or a small mixed sieve surface reinforced by a composite polymer strip to ensure that the sieve surface is in a dense mesh opening state. It has better rigidity and bending performance.
  • the endless conveyor belt of the present invention is sleeved on the rollers at both ends to form a belt transmission structure, and the drum has a blocking edge, which can effectively overcome the deviation and drift phenomenon of the conveyor belt, and the roller and/or the idler roller There is glue on the work surface to increase friction.
  • a plurality of working sieves can be formed into a group of small mesh belt screens, which are arranged in the same screen box on the upper and lower sides, in order to avoid the mixed materials with the lower layer in order to clean the undersize materials, wherein the bottom is from the bottom to the second small
  • the small mesh belt screen of the miscellaneous mesh belt is provided with a slanted out-draft slide plate, and the splayed slide plate may be: a. a set of parallel plates inclined along the mesh belt; or b. 2 oppositely inclined
  • the v-shaped structure, the slanting slide plate inclined along the mesh belt is a v-shaped structure, and the bottom has a spiral discharge mechanism; c.
  • the small mesh screen and/or the large and medium mesh screen are equipped with a cleaning roller or Clean the brush.
  • the traditional grain removal machine can only use a kind of equipment for different kinds of mesh, such as cleaning up the impurities of the corn harvest and cleaning up the impurities of the rice harvest.
  • the small miscellaneous mesh belt screen of the invention is respectively provided with a large-grain grain mesh screen and a small-grain grain mesh screen, and the direction of the redirection plate is manually dialed. Selective diversion, enter the small mesh screen with different size sieve holes, one device to complete a variety of food removal process.
  • Figure 1 is a schematic view of the structure of the product.
  • Figure 2 is a left side view of Figure 1 (2 small mesh screens).
  • Figure 3 is a schematic view of the structure of the screen box of the product (the parallel conveyor plate is arranged in the large and medium mesh belt screen, and the floating slide plate of the small miscellaneous mesh belt screen is a v-shaped structure perpendicular to the traveling direction of the mesh belt).
  • Figure 4 is a schematic view of the structure of the screen box of the product (the parallel conveyor plate is arranged in the large medium mesh belt screen, and the unloading slide plate of the small miscellaneous mesh belt screen is an inverted v-shaped structure which is consistent with the traveling direction of the mesh belt).
  • Figure 5 is a left side view of Figure 4.
  • Figure 6 is a schematic view of the structure of the screen box of the product (the small miscellaneous mesh screen is a v-shaped structure perpendicular to the traveling direction of the mesh belt, and the discharge sliding plate of the large miscellaneous mesh screen is in the same direction as the traveling direction of the mesh belt. Inverted v-shaped structure).
  • Figure 7 is a left side view of Figure 6.
  • Figure 8 is a schematic view of the structure of the screen box of the product (two small mesh belt screens, the small miscellaneous mesh belt screen has a jigsaw slide, and the inlet of the small miscellaneous net screen has an inlet distribution device 19).
  • Figure 9 is a schematic view showing the structure of the impurity removing portion of the small miscellaneous mesh belt.
  • Figure 10 is a schematic view of a small mesh belt screen structure (without coupling and drive).
  • Figure 11 is a schematic view of a small mesh belt screen structure with a rib (removal drive mechanism. Power input shaft 21).
  • Figure 12 is a schematic view of a small mesh belt screen structure of a composite screen surface (the circular portion in the middle removes the small mixed screen surface).
  • Figure 13 is a schematic view of a large and medium mesh belt screen structure with a rib (removal drive mechanism, power input shaft 21).
  • Figure 14 is a left side view of Figure 13.
  • Figure 15 is a schematic view of a small mesh belt screen structure (without coupling and drive).
  • Figure 16 is a schematic view of a large and medium mesh belt screen structure (without coupling and drive).
  • Figure 17 is a schematic view showing the structure of the flat return mechanism (the heavy wheel 22).
  • Figure 18 is a schematic view showing the structure of the s skirt.
  • Figure 19 is a plan view of Figure 18.
  • Figure 20 is a schematic view showing the structure of a butted baffle.
  • Figure 21 is a plan view of Figure 20.
  • Figure 22 is a schematic view showing the structure of a staggered baffle.
  • Figure 23 is a plan view of Figure 22.
  • Figure 24 is a schematic view showing the structure of a staggered baffle.
  • Figure 25 is a plan view of Figure 24.
  • Figure 26 is a schematic view showing the structure of an inlet distribution device. (24 is the grain entrance, 25 is the hopper of the inlet distribution device).
  • the mesh screen is arranged on the upper screen, and the composition comprises: a sieve frame, wherein the sieve frame is connected to the screen box by a boom or a rocker or a swing rod, and the screen box is provided with a set of small mesh belts.
  • Screen and large and medium mesh screen, the small mesh screen and the middle and middle mesh screen are equipped with a flat return mechanism, and the small mesh screen has a sloped surface under the screen surface.
  • the feeding device of the small mesh screen is equipped with an inlet distribution device, the inlet distribution device has a distribution groove, and the bottom end of the distribution groove has a set of grain inlets, each layer of small sieve and 1 - 3 corresponding feeding openings, the sieve surface of the small mesh screen is intersected with the hard wire cleaning roller, and the side of the small mesh screen is equipped with a suction and dust suction device.
  • the mesh belt is screened on the upper screen, and the composition comprises: a sieve frame 1, and the sieve frame is connected to the screen box 2 through a boom 9 or a rocker or a swing rod or a wire rope, and the screen box is installed a small mesh belt screen 4 and a large medium mesh screen 3, the screen box connecting the flat return mechanism 5, the large medium mesh screen and/or the small mesh screen having a rib 6.
  • the small mesh screen has a sloping and outgoing slide plate 17 below the screen surface, and the bottom of the waste slide plate is provided with a discharge mechanism 18.
  • the small hybrid screen described in the first embodiment has a flat mesh back screen, and the rib 6 is a polymer barrier plate fixed on both sides of the mesh belt, and the polymer barrier is s-shaped or zigzag-shaped. Elastic band or a set of butted baffles or a set of staggered baffles. In order to enable the rib to rotate through the drum with the mesh belt, there may be various ways, and the polymer barrier plate 6 may be continuous, such as s-shaped, or zigzag, or W-shaped barrier tape, which may be used.
  • Nylon, plastic, rubber, etc.; can also be used as a discontinuous baffle, such as a pair of butted baffles 6 or a set of staggered baffles 6, the bottom of the discontinuous baffles can be connected, the upper part is separate , can move together to form a fan shape.
  • the rubber side is added on both sides of the screen surface, so that the overall width is larger than the width of the channel. In the channel, the two sides are rolled up, and the channel is widened at the turning point, and the baffle is naturally flattened and the screen surface is flattened and bent.
  • the small miscellaneous sieve of the embodiment 1 or 2 is sieved on the upper mesh belt, and the small miscellaneous mesh belt sieve is a group. If more than 2 small miscellaneous mesh belt screens work at the same time, the upper part is generally equipped with an inlet distribution device. 19.
  • the small The miscellaneous mesh belt screen is provided with a slanted and outgoing slippage skateboard 17, which can be inclined along the mesh belt or changed in a direction of 90 degrees---inclined to both sides of the mesh belt to form an inverted v-shaped structure, and impurities are emitted from both sides.
  • the position where the impurities are discharged to both sides also has the passage 16.
  • the small mesh belt screen is connected to the feeding device of the large medium mesh screen through the guiding trough.
  • the small hybrid screen of the embodiment 1 or 2 or 3 is laid flat on the upper mesh belt, if the impurity slides are disposed opposite to each other and are inclined along the mesh belt--the said slippery slide is a v-shaped structure, the bottom There is a spiral discharge mechanism 18.
  • the small mesh screen and/or the large and medium mesh screens are provided with a polygonal cleaning roll or a cleaning brush 20 that intersects the screen surface after turning.
  • the sloping slide is inclined to the side box of the screen box, and the slab is connected to the slanting board, and the slanting board is a set of slanting boards arranged at opposite angles, the inclination angle is 4- At 15 degrees, the inclined plates form a concave surface, and each layer of small miscellaneous sieves corresponds to 1-3 feeding openings.
  • the small hybrid screen of the embodiment 1 or 2 or 3 or 4 is provided with a flat belt back screen, and the large medium mesh screen is provided with a conveying plate 12, which is a set of parallel
  • the deflecting swash plate or the discharging swash plate which is discharged to both sides is provided with a secondary impurity output mechanism 15 in the outlet direction of the large and medium mesh screen of the lower layer.
  • the guiding swash plate is inclined along the mesh belt, the high end is located on the side of the grain inlet, or the guiding swash plate is inclined to both sides, and the lower end thereof is located on the side of the lateral plate of the box.
  • the small mesh screen and the large and medium mesh screen have a roller under the screen surface, and the guiding swash plate is a small sieve plate, and the flow guiding plate is below Has a small miscellaneous discharge mechanism.
  • the small hybrid screen of the embodiment 1 or 2 or 3 or 4 or 5 is sieved flat on the upper mesh belt, and the large medium mesh screen comprises a set of metal sieves arranged in sequence or formed by wire braiding.
  • the small hybrid screen of the embodiment 1 or 2 or 3 or 4 or 5 or 6 is sieved on the upper mesh belt, and the small hybrid mesh screen comprises a set of metal sieves arranged in sequence or formed by wire braiding.
  • An endless conveyor belt or an endless belt of a stamped screen, the small mesh belt screen comprising a composite screen surface, the small mesh belt screen having a screen angle of 0-5 degrees, the small miscellaneous mesh belt The sieve hole is 0.8 times smaller than the sieved grain.
  • the small hybrid screen of the embodiment 1 or 2 or 3 or 4 or 5 or 6 or 7 has a flat belt back screen on the upper mesh belt, and the endless conveyor belt formed by the large medium mesh screen and the small mesh belt screen are respectively placed on the On the drums at both ends, the drum has a blocking edge 14 to avoid the deviation of the screen surface, and can also block the food from being released to some extent, and the one-side drum is connected to the driving mechanism as a power source for the screen surface movement--- The driving wheel, the working surface of the roller and/or the roller can be glued to ensure a stable friction coefficient.
  • the small mesh screen and/or the large medium mesh screen are equipped with a cleaning roller or a cleaning brush 20.
  • the invention relates to a method for removing grain by using a small mesh sieve on one of the embodiments 1-8, and a driving mechanism for starting the mesh belt screening operation and a flat returning mechanism for driving the screen box to move back. , forming a compound movement mode of the flat-back movement and the straight-line movement of the net belt, and putting the material of the mixture including the grain after the threshing into the small miscellaneous cleaning sieve, rolling through the net belt straight forward and the peace back movement, the grain Under the blockage of the ribs, small impurities such as dust, dust, straw and fines are screened, and the large-sized sieve material including grain is passed through the guide trough 26 into the large and medium mesh screen.
  • the sieve residue material is rolled in the large and medium mesh belt screen through the bumps and the flat back movement during the straight process of the mesh belt, and the grain is sieved and collected; the large debris of the sieve is forwarded under the blocking of the rib, and the collector is introduced into the collector. .
  • the small miscellaneous sieve according to the embodiment 9 is used for the method of removing the impurities by the flat belt back screen, and the plurality of small mesh belt screens are used to distribute the materials into the small mixed sieve surfaces of different layers through the inlet distribution device.
  • the inlet distribution device has a distribution trough, and the bottom end of the distribution trough has a set of grain inlets, and each layer of small miscellaneous sieves corresponds to 1-3 of the food inlets.

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  • Combined Means For Separation Of Solids (AREA)

Abstract

公开了一种小杂筛在上的网带平回筛及其进行粮食除杂的方法。小杂筛在上的网带平回筛包括：筛架（1），筛架（1）通过吊杆（9）或者摇杆或者摆杆或者钢丝绳连接筛箱（2），筛箱中装有小杂网带筛（4）和大中杂网带筛（3），筛箱连接平回机构（5），大中杂网带筛和/或所述的小杂网带筛带有挡边（6），小杂网带筛的筛面下方具有倾斜的出杂滑板（17），出杂滑板（17）的底部装有出料机构（18）。网带平回筛用于后期粮食除杂。

Description

小杂筛在上的网带平回筛及其进行粮食除杂的方法 技术领域：
本发明涉及一种大型的粮食除杂清理设备，特别是一种每小时处理量可达100-500吨的用于清除大、中、小杂的超大型粮食清理除杂设备，与传统的先清理大杂的网带筛比较，本发明更是合适于大杂较少或者已经经过一次大杂清理的粮食。
背景技术：
目前市场上没有能够同时去除大中小杂的大型粮食清理设备，传统的用于处理大杂的设备主要是网带筛和滚筒筛，网带筛产量一般为100-500t/h，滚筒筛为50-150t/h，处理中小杂的设备主要是振动筛和回转筛，产量一般在10-50t/h，处理量50t/h以上的中小杂筛已经算是先进的大型设备。如果每小时清理200吨原粮，需要配置2台100t/h的滚筒初清筛处理大杂和4台先进的50t/h的回转筛处理中小杂，成本达到80万左右，同时需要四层的工作塔，高度相当于4层楼高，成本更要100万以上，筛理设备加上工作塔再加上安装费用等，综合成本在200万以上，且上述成本还未将提升机相关费用计入。而且设备运转需要的能耗较高，一台100t/h的滚筒初清筛能耗5.5kW，一台50t/h的旋振筛能耗3.0kW，因此处理200吨原粮能耗需23kW以上，若加上提升机则能耗更高。若每小时处理200吨以上的原粮则需要更繁琐的配置和更高的能耗，设备之间还需要分溜器等联接配件，成本则更高。粮食收获回来以后，由于不能及时入仓，虫吃、鼠叼、鸟衔、发霉，损失在收获粮食的10％以上，解决粮食初加工速度，是国家和粮食行业发展中亟待解决的问题。
传统清理大杂的网带初清筛由进料斗、网带输送机构、清理机构及传动系统组成。主要清除草绳头、长秸秆、砖头、土块等大型杂物。当含有粮食的收获物自然下落至筛面以后，由于粮食粒径远小于筛孔，通过筛孔落下流向粮食出料口；而大杂质粒度或长度大于筛孔，就不能或不易通过筛孔，而留在筛面上，大杂质随着输送网带的前行被输送到杂质出料口，从而将粮食等小粒径收获物和大杂质分离。
由于网带筛的筛分过程属于自由下落性质，下层也非常容易在二次筛分中堵塞。传统上，网带筛都是断续工作，用于清理大杂，对于清理中杂不能适应，因为网眼变小更容易堵塞，行业上没有将其用于进行中杂小杂的清理。
再说清理小杂，以清理水稻小杂为例，传统的清理筛产量一般在30-50吨/时，产量100吨/时的平回清理筛只有少数厂家能够生产。传统清理筛筛面与筛箱相对固定，并且只做平回运动，部分小杂或破碎的原粮经过工作中很容易卡在筛孔中，造成筛面堵塞，无法自行清理，筛面清理机构不理想，工人必须每天清理一次筛面，疏通筛孔，耗时耗力，否则就会影响筛理效果。
发明内容：
本发明的目的是提供一种处理能力强、处理量大，建设高度小、建设费用低、能够自清的网带平回筛及其进行粮食除杂的方法。
小杂筛在上的网带平回筛，其组成包括：筛架，所述的筛架通过吊杆或者摇杆或者摆杆连接筛箱，所述的筛箱中装有一组小杂网带筛和大中杂网带筛，所述的小杂网带筛和大中杂网带筛中间装有平回机构，所述的小杂网带筛的筛面下方具有出杂滑板，所述的大中杂网带筛和/或所述的小杂网带筛带有挡边，所述的出杂滑板的底部装有出料机构。
所述的小杂筛在上的网带平回筛，所述的挡边为固定在网带两边的高分子阻隔板，所述的高分子阻隔板为s形或之字形的弹性带或者一组对接的挡板或者一组交错的挡板。
所述的小杂筛在上的网带平回筛，所述的小杂网带筛为一组，所述的小杂网带筛装有入口分配装置，所述的小杂网带筛的通过导料槽连接大中杂网带筛的进料装置。
所述的小杂筛在上的网带平回筛，所述的出杂滑板向网带筛中部倾斜，所述的出 杂滑板底部具有螺旋排杂装置；或者所述的出杂滑板向所述的筛箱的侧箱板倾斜，所述的出杂滑板连接出杂通道，所述的出杂滑板为一组相向布置的斜板，倾斜角度为4-15度，所述的斜板形成凹面，每层小杂筛与1-3个进粮口相对应。
所述的小杂筛在上的网带平回筛，所述的大中杂网带筛中装有导流斜板，所述的导流斜板沿网带走向倾斜，其高端位于进粮口一侧，或者所述的导流斜板向两侧倾斜，其低端位于所述的箱体的侧向板一侧；所述的小杂网带筛和所述的大中杂网带筛的筛面下面均带有托辊，所述的导流斜板为小杂筛板，所述的导流筛板下方具有小杂出料机构，所述的小杂筛在上的网带平回筛，所述的大中杂网带筛包括一组金属筛片顺次排列或金属丝编结形成的环形传送带或者冲压筛面的环形传送带，所述的大杂筛的筛面角度为0-4度，所述的大中杂网带筛筛孔大于被筛分粮食的1.5倍。
所述的小杂筛在上的网带平回筛，所述的小杂网带筛包括一组金属筛片顺次排列或金属丝编结形成的环形传送带或者冲压筛面的环形传送带，所述的小杂网带筛包括复合的筛面，所述的小杂网带筛的筛面角度为0-5度，所述的小杂网带筛筛孔小于被筛分粮食的0.8倍。
所述的小杂筛在上的网带平回筛，所述的环形传送带套在两端的滚筒上，所述的滚筒带有阻挡边，一侧所述的滚筒连接所述的驱动机构，所述的滚筒和所述的托辊的工作面均有挂胶，所述的小杂网带筛和/或所述的大中杂网带筛装有清理辊或者清理刷。
利用所述的小杂筛在上的网带平回筛进行粮食除杂的方法，启动网带筛工作的驱动机构和驱动筛箱平回运动的平回机构，形成平回运动和网带直行运动的复合运动模式，将脱粒后的包括粮食在内的混合物的物料投入到小杂清理筛中，通过网带直行过程中的颠簸和平回运动的滚动，粮食在挡边的阻挡下前行，筛下灰尘尘土秸秆细屑之类小杂物质，包括粮食在内的大颗粒的筛余物料，进入大中杂网带筛，所述的筛余物料在大中杂网带筛中通过网带直行过程中的颠簸和平回运动的滚动，筛下粮食，收集起来；筛余大杂物体在挡边的阻挡下前行，导入收集器。
所述的小杂筛在上的网带平回筛进行粮食除杂的方法，采用多个小杂网带筛，通过入口分配装置将物料分配到不同层面的小杂筛面中，所述的入口分配装置具有分配槽，所述的分配槽底端具有一组进粮口，每层小杂筛与1-3个所述的进粮口相对应。
本发明的有益效果：
1.常规的先除大杂的过程中，经常有大量小杂随行的品种，能源浪费比较大，本发明的小杂筛在上的网带平回筛更适合小杂比较多、大杂比较少的粮食种类，特别适合一次仓储后加工前的粮食加工。本发明加工产量高，同样占地面积，单层高度处理水稻单台产量可达每小时50-300吨，并且可以根据客户的特殊需求定制2000吨的特大型筛。另外，本发明的筛面进行直线运动，筛箱进行平回运动，形成复合运动的模式，这种复合运动使筛面具备了自清功能，当筛面运动到滚筒处，筛面弯曲时，筛孔内的堵塞物便会在平回运动下借力弹出或松动，筛面运动到朝下时，筛面上的物质会因重力和平回作用而下落，从而达到了筛面自动清理的效果，可大大节省人工劳动力。
本发明的筛面下面装有托辊，防止筛面下沉变形。传统清理筛需要配置两种筛型分别处理大杂和中小杂，需要几层楼高的工作塔，并且吸风点多，需要配置多个脉冲除尘器，配置繁琐，提升机较高，一般在30米以上，设备运转需要的能耗较高，因此综合成本高。本发明的清理筛既能够去除大杂也能去除中小杂，一台清理筛可代替传统的多个清理筛才能完成的工资，并且不需要较高的工作塔，降低了粮食提升的高度，简化了配置在一个封闭空间内完成了多个筛分工艺，既节约了能耗又降低了成本，提高了筛分质量减少污染和倒运工作。
本发明的小杂网带筛筛面下方具有倾斜的出杂滑板，可以使筛下物及时排出，筛余物从小杂网带筛落下到大中杂网带筛，在大中杂网带筛上再进行一次大杂的筛理，将大 杂小杂和朗视分三路快速输出，在比较短的时间内，有效提高筛理效果。
本发明的大中杂网带筛中可以装有输送板，所述的输送板为一组平行的导流斜板，可以有效加长筛理长度，提高筛分质量，采用导流斜板时，位于下层的所述的大中杂网带筛的出口方向装有大杂输出机构。根据筛理不同植物秸秆的情况，有时也可以采用向两侧出料的出料斜板，以防止二次筛分过程堵塞。
本发明的网带筛的筛面具有多种形式，可由金属筛片顺次排列形成，或为金属丝编结形成，或者冲压形成，如果采用一端铰接的筛片，在运行到下层的时候，可以打开筛面，使得筛下物顺利排出，避免内堵，采用不同形式的筛面，可以适用于不同种类的原粮筛分要求。
本发明的网带筛由于在行进中复合了圆运动，形成粮食的螺旋轨迹，显著提高了筛分效果，不可忽视的是平回运动中，粮食无可避免的会滚落到两侧，为了避免筛余物的混杂，所述的大中杂网带筛和/或小杂网带筛带有挡边，本发明的筛面上采用s形的挡边或者之字形挡边，挡边采用高分子阻隔板，当弯曲部分展开时，长度方向具有弹性—即可延展性，能够适应筛面的直线或弯曲2种运动方式：在平面运动时能有效阻挡粮食散落到筛面以外，弯转时围绕中心展开随筛面转过滚筒。由于用s形的挡边或者之字形挡边占用宽度比较大，本发明的挡边也可以是不连续式的，例如本发明提供了截面对接的或者搭接的挡边，在弯转时，挡边之间上部拉开可以相互分离、展开，因此都能实现平面筛分运动时阻挡、和弯转时圆周展开的效果，使得挡边能够随着筛面顺利转过滚筒。为了解决粮食在两侧落下的问题。
对于筛理面积比较大的设备，为了避免筛面因中部物料较多带来的堆积、筛面变形和寿命较短的问题，大中杂网带筛筛面下面装有托辊和/或小杂网带筛筛面下面装有托辊，托辊之间的距离一般在0.3-0.8米。
为了强化筛理效果，对于所述的大中杂网带筛的筛面角度为0-4度，所述的大中杂网带筛的筛孔大于粮食尺寸的1.5倍以上；所述的小杂网带筛的筛面角度为0-5度，所述的小杂网带筛的筛孔小于粮食尺寸的0.8倍，使得粮食筛分效果最佳。
本发明的小杂网带筛包括复合的筛面，包括螺旋钢丝的刚性骨架筛面和密孔筛面，或者复合高分子条加强的小杂筛面，保证筛面在较密的筛孔状态下具有较好的刚性和弯转性能。
本发明所述的环形传送带套在两端的滚筒上，形成带传动结构，所述的滚筒具有阻挡边，能够有效克服传送带的偏离和漂移现象，所述的滚筒和/或所述的托辊的工作面有挂胶，增加摩擦力。
根据情况本发明可以将多个工作筛组成一组小杂网带筛，上下布置在同一个筛箱中，为了清理筛下物避免与下层的粮食混杂，其中自下而上从第二个小杂网带筛起所述的小杂网带筛装有倾斜的出杂滑板，所述的出杂滑板可以是：a.一组沿网带倾斜的平行板；或者b.2个相向倾斜成v型结构、沿网带倾斜的所述的出杂滑板如果是v形结构，则底部具有螺旋排杂机构；c.也可以向网带一侧或者两侧倾斜形(成倒v型结构)，便于筛下物清除；筛分杂质粘性比较大的物料时，为了更新筛网的工作性能，所述的小杂网带筛和/或所述的大中杂网带筛装有清理辊或者清理刷。
由于原粮的粒度差异，传统的粮食除小杂机械只能为一种粮食除杂，例如清理玉米收获物的杂质和清理水稻收获物的杂质，就需要分别使用不同筛孔的设备。为了不同粮食种类共享本发明的设备，减少仓储单位开支，本发明的小杂网带筛分别设置了大颗粒粮食网带筛、小颗粒粮食网带筛，通过人工拨动改向板的方向，进行选择性导流，进入不同大小筛孔的小杂网带筛，一台设备完成多种粮食的除小杂过程。
附图说明：
附图1是本产品的结构示意图。
附图2是附图1的左视图(2个小杂网带筛)。
附图3是本产品筛箱的结构示意图(大中杂网带筛中装有平行的输送板，小杂网带筛的出杂滑板为与网带行进方向垂直的v型结构)。
附图4是本产品筛箱的结构示意图(大中杂网带筛中装有平行的输送板，小杂网带筛的出杂滑板为与网带行进方向一致的倒v型结构)。
附图5是附图4的左视图。
附图6是本产品筛箱的结构示意图(小杂网带筛的出杂滑板为与网带行进方向垂直的v型结构，大杂网带筛的出料滑板为与网带行进方向一致的倒v型结构)。
附图7是附图6的左视图。
附图8是本产品筛箱的结构示意图(2个小杂网带筛，小杂网带筛中具有出杂滑板，小杂网带筛的入口具有入口分配装置19)。
附图9是小杂网带筛除杂部分结构示意图。
附图10小杂网带筛结构示意图(不带联轴器和驱动装置)。
附图11是带有挡边的小杂网带筛结构示意图(拆除驱动机构。动力输入轴21)。
附图12是复合筛面的小杂网带筛结构示意图(中间的圆形部分去除了小杂筛面)。
附图13是带有挡边的大中杂网带筛结构示意图(拆除驱动机构。动力输入轴21)。
附图14是附图13左视图。
附图15是小杂网带筛结构示意图(不带联轴器和驱动装置)。
附图16是大中杂网带筛结构示意图(不带联轴器和驱动装置)。
附图17是平回机构的结构示意图(偏重轮22)。
附图18是s裙边的结构示意图。
附图19是附图18的俯视图。
附图20是对接的挡板的结构示意图。
附图21是附图20的俯视图。
附图22是交错的挡板的一种结构示意图。
附图23是附图22的俯视图。
附图24是交错的挡板的一种结构示意图。
附图25是附图24的俯视图。
附图26是入口分配装置的结构示意图。(24是入粮口，25是入口分配装置的料斗)。
具体实施方式：
实施例1
小杂筛在上的网带平回筛，其组成包括：筛架，所述的筛架通过吊杆或者摇杆或者摆杆连接筛箱，所述的筛箱中装有一组小杂网带筛和大中杂网带筛，所述的小杂网带筛和大中杂网带筛中间装有平回机构，所述的小杂网带筛的筛面下方具有倾斜面的出杂滑板，所述的小杂网带筛的进料装置装有入口分配装置，所述的入口分配装置具有分配槽，所述的分配槽底端具有一组进粮口，每层小杂筛与1-3个所述的进粮口相对应，所述的小杂网带筛的筛面与硬丝清理辊相贯，所述的小杂网带筛的一侧装有吸风吸尘设备。
实施例2
小杂筛在上的网带平回筛，其组成包括：筛架1，所述的筛架通过吊杆9或者摇杆或者摆杆或者钢丝绳连接筛箱2，所述的筛箱中装有小杂网带筛4和大中杂网带筛3，所述的筛箱连接平回机构5，所述的大中杂网带筛和/或所述的小杂网带筛带有挡边6，所述的小杂网带筛的筛面下方具有倾斜的出杂滑板17，所述的出杂滑板的底部装有出料机构18。
实施例2：
实施例1所述的小杂筛在上的网带平回筛，所述的挡边6为固定在网带两边的高分子阻隔板，所述的高分子阻隔板为s形或之字形的弹性带或者一组对接的挡板或者一组交错的 挡板。为了使挡边能够随着网带转过滚筒，可以有多种方式，所述的高分子阻隔板6可以是为连续的，比如s形，或之字形、或W形的阻隔带，可以采用尼龙、塑料、橡胶等材质；也可以做不连续的挡板例如一组对接的挡板6或者一组交错的挡板6，不连续挡板的的底部之间可以有连接，上部是分开的，可以相互运动展开成扇形。或者筛面两侧加橡胶边，使得整体宽度大于通道宽度，在通道中是两边卷起向上，到了转弯处通道放宽，挡板自然落平和筛面一样，放平过弯。
实施例3：
实施例1或2述的小杂筛在上的网带平回筛，所述的小杂网带筛为一组，如果超过2个小杂网带筛同时工作，上部一般装有入口分配装置19，考虑到最下面一个小杂网带筛可以通过底板将分离出的小杂排出不会混入粮食中，所以自下而上第二个所述的小杂网带筛起，所述的小杂网带筛装有倾斜的出杂滑板17，所述的出杂滑板可以沿网带倾斜、或者换90度方向---向网带两侧倾斜形成倒v型结构，从两侧出杂质，向两侧出杂质的位置也具有通道16。所述的小杂网带筛的通过导料槽连接大中杂网带筛的进料装置。
实施例4：
实施例1或2或3所述的小杂筛在上的网带平回筛，如果出杂滑板相向设置并且沿网带倾斜----所述的出杂滑板是v形结构，则底部具有螺旋排杂机构18。
对于容积粘结的物料，所述的小杂网带筛和/或所述的大中杂网带筛在转弯后装有多边形的清理辊或者与筛面相贯的清理刷20。
或者所述的出杂滑板向所述的筛箱的侧箱板倾斜，所述的出杂滑板连接出杂通道，所述的出杂滑板为一组相向布置的斜板，倾斜角度为4-15度，所述的斜板形成凹面，每层小杂筛与1-3个进粮口相对应。
实施例5：
实施例1或2或3或4所述的小杂筛在上的网带平回筛，所述的大中杂网带筛中装有输送板12，所述的输送板为一组平行的导流斜板或者向两侧出料的出料斜板，位于下层的所述的大中杂网带筛的出口方向装有二次杂质输出机构15。向两侧出料的出料斜板和侧壁之间具有出粮通道16。所述的导流斜板沿网带走向倾斜，其高端位于进粮口一侧，或者所述的导流斜板向两侧倾斜，其低端位于所述的箱体的侧向板一侧；所述的小杂网带筛和所述的大中杂网带筛的筛面下面均带有托辊，所述的导流斜板为小杂筛板，所述的导流筛板下方具有小杂出料机构。
实施例6：
实施例1或2或3或4或5所述的小杂筛在上的网带平回筛，所述的大中杂网带筛包括一组金属筛片顺次排列或金属丝编结形成的环形传送带或者冲压筛面的环形传送带，所述的大杂筛的筛面角度为0-4度，所述的大中杂网带筛筛孔大于被筛分粮食的1.5倍。
实施例7：
实施例1或2或3或4或5或6所述的小杂筛在上的网带平回筛，所述的小杂网带筛包括一组金属筛片顺次排列或金属丝编结形成的环形传送带或者冲压筛面的环形传送带，所述的小杂网带筛包括复合的筛面，所述的小杂网带筛的筛面角度为0-5度，所述的小杂网带筛筛孔小于被筛分粮食的0.8倍。
实施例8：
实施例1或2或3或4或5或6或7所述的小杂筛在上的网带平回筛，大中杂网带筛和小杂网带筛形成的环形传送带都分别套在两端的滚筒上，所述的滚筒带有阻挡边14，避免筛面偏离，也能一定程度上阻挡粮食脱出，一侧滚筒连接所述的驱动机构，做为筛面运动的动力源---主动轮，所述的滚筒和/或所述的托辊的工作面都可以有挂胶，保证维持稳定的摩擦系数。
所述的小杂网带筛和/或所述的大中杂网带筛装有清理辊或者清理刷20。
实施例9：
一种利用实施例1-8之一所述的小杂筛在上的网带平回筛进行粮食除杂的方法，启动网带筛工作的驱动机构和驱动筛箱平回运动的平回机构，形成平回运动和网带直行运动的复合运动模式，将脱粒后的包括粮食在内的混合物的物料投入到小杂清理筛中，通过网带直行过程中的颠簸和平回运动的滚动，粮食在挡边的阻挡下前行，筛下灰尘尘土秸秆细屑之类小杂物质，包括粮食在内的大颗粒的筛余物料，经导料槽26进入大中杂网带筛，所述的筛余物料在大中杂网带筛中通过网带直行过程中的颠簸和平回运动的滚动，筛下粮食，收集起来；筛余大杂物体在挡边的阻挡下前行，导入收集器。
实施例10
实施例9所述的小杂筛在上的网带平回筛进行粮食除杂的方法，采用多个小杂网带筛，通过入口分配装置将物料分配到不同层面的小杂筛面中，所述的入口分配装置具有分配槽，所述的分配槽底端具有一组进粮口，每层小杂筛与1-3个所述的进粮口相对应。

Claims (10)

  1. 一种小杂筛在上的网带平回筛，其组成包括：筛架，网带平回筛，所述的筛架通过吊杆或者摇杆或者摆杆连接筛箱，其特征是：所述的筛箱中装有一组小杂网带筛和大中杂网带筛，所述的小杂网带筛和大中杂网带筛中间装有平回机构，所述的小杂网带筛的筛面下方具有出杂滑板，所述的大中杂网带筛和/或所述的小杂网带筛带有挡边，所述的出杂滑板的底部装有出料机构。
  2. 根据权利要求1所述的小杂筛在上的网带平回筛，其特征是：所述的挡边为固定在网带两边的高分子阻隔板，所述的高分子阻隔板为s形或之字形的弹性带或者一组对接的挡板或者一组交错的挡板。
  3. 根据权利要求1或2所述的小杂筛在上的网带平回筛，其特征是：所述的小杂网带筛为一组，所述的小杂网带筛装有入口分配装置，所述的小杂网带筛的通过导料槽连接大中杂网带筛的进料装置。
  4. 根据权利要求1或2或3所述的小杂筛在上的网带平回筛，其特征是：所述的出杂滑板向网带筛中部倾斜，所述的出杂滑板底部具有螺旋排杂装置；或者所述的出杂滑板向所述的筛箱的侧箱板倾斜，所述的出杂滑板连接出杂通道，所述的出杂滑板为一组相向布置的斜板，倾斜角度为4-15度，所述的斜板形成凹面，每层小杂筛与1-3个进粮口相对应。
  5. 根据权利要求1或2或3或4小杂筛在上的网带平回筛，其特征是：所述的大中杂网带筛中装有导流斜板，所述的导流斜板沿网带走向倾斜，其高端位于进粮口一侧，或者所述的导流斜板向两侧倾斜，其低端位于所述的箱体的侧向板一侧；所述的小杂网带筛和所述的大中杂网带筛的筛面下面均带有托辊，所述的导流斜板为小杂筛板，所述的导流筛板下方具有小杂出料机构。
  6. 根据权利要求1或2或3或4或5所述的小杂筛在上的网带平回筛，其特征是：所述的大中杂网带筛包括一组金属筛片顺次排列或金属丝编结形成的环形传送带或者冲压筛面的环形传送带，所述的大杂筛的筛面角度为0-4度，所述的大中杂网带筛筛孔大于被筛分粮食的1.5倍。
  7. 根据权利要求1或2或3或4所述的小杂筛在上的网带平回筛，其特征是：所述的小杂网带筛包括一组金属筛片顺次排列或金属丝编结形成的环形传送带或者冲压筛面的环形传送带，所述的小杂网带筛包括复合的筛面，所述的小杂网带筛的筛面角度为0-5度，所述的小杂网带筛筛孔小于被筛分粮食的0.8倍。
  8. 根据权利要求6或5所述的小杂筛在上的网带平回筛，其特征是：所述的环形传送带套在两端的滚筒上，所述的滚筒带有阻挡边，一侧所述的滚筒连接所述的驱动机构，所述的滚筒和所述的托辊的工作面均有挂胶，所述的小杂网带筛和/或所述的大中杂网带筛装有清理辊或者清理刷。
  9. 一种利用权利要求1-7之一所述的小杂筛在上的网带平回筛进行粮食除杂的方法，其特征是：启动网带筛工作的驱动机构和驱动筛箱平回运动的平回机构，形成平回运动和网带直行运动的复合运动模式，将脱粒后的包括粮食在内的混合物的物料投入到小杂清理筛中，通过网带直行过程中的颠簸和平回运动的滚动，粮食在挡边的阻挡下前行，筛下灰尘尘土秸秆细屑之类小杂物质，包括粮食在内的大颗粒的筛余物料，经导料槽进入大中杂网带筛，所述的筛余物料在大中杂网带筛中通过网带直行过程中的颠簸和平回运动的滚动，筛下粮食，收集起来；筛余大杂物体在挡边的阻挡下前行，导入收集器。
  10. 根据权利要求8所述的小杂筛在上的网带平回筛进行粮食除杂的方法，其特征是：采用多个小杂网带筛，通过入口分配装置将物料分配到不同层面的小杂筛面中，所述的入口分配装置具有分配槽，所述的分配槽底端具有一组进粮口，每层小杂筛与1-3个所述的进粮口相对应。
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