WO2019091335A1

WO2019091335A1 - Mesh belt plane gyratory screen with function of removing large impurities first, and grain impurity removal method thereof

Info

Publication number: WO2019091335A1
Application number: PCT/CN2018/113573
Authority: WO
Inventors: 刘全义
Original assignee: 刘全义
Priority date: 2017-11-08
Filing date: 2018-11-02
Publication date: 2019-05-16
Also published as: WO2019091331A1; CN208427375U; CN208373576U; CN107716262A; CN109290190A; WO2019091332A1; WO2019091333A1; WO2019091330A1; CN109290191A; CN108372104A; CN208824949U; CN108212770A; CN108311389A; CN109225797A; WO2019091334A1; CN208583594U; CN108311390A

Abstract

Disclosed are a mesh belt plane gyratory screen with the function of removing large impurities first, and a grain impurity removal method thereof. The mesh belt plane gyratory screen comprises a screen frame (1), wherein a screen box (2) is suspended in the screen frame via rocker rods (9), swing rods or steel wire ropes; the screen box (2) is internally provided with a large- and medium-impurity mesh belt screen (3) and a small-impurity mesh belt screen (4); the screen box (2) is connected to a plane gyratory motion mechanism (5); the plane gyratory motion mechanism (5) provides the screen box (2) with a power source for performing a circular motion; two sides of the large- and medium-impurity mesh belt screen (3) and/or the small-impurity mesh belt screen (4) are connected to a side plate (22) via a sealing structure (6); a lower portion of the large- and medium-impurity mesh belt screen (3) is provided with a grain-guiding mechanism (7); an inlet of the small-impurity mesh belt screen (4) is located at the lower end of the grain-guiding mechanism (7); and the large- and medium-impurity mesh belt screen (3) and the small-impurity mesh belt screen (4) are both connected to a driving mechanism (8). With the above structure, the efficiency of impurity removal is improved, the impurity removal is more sufficient, and the quality is higher.

Description

First clearing mesh belt flat back sieve and its grain removal method

Technical field:

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.

Background technique:

At present, there is no large-scale grain cleaning equipment capable of simultaneously removing large, medium and small impurities. 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. If you clean 200 tons of raw grain per hour, you need to configure two sets of 100t/h drums for primary cleaning and four advanced 50t/h rotary screens for small and medium-sized, costing up to 800,000, and require four layers of work. Tower, the height is equivalent to 4 stories, the cost is more than 1 million, the sifting equipment plus the working tower plus the installation cost, etc., the comprehensive cost is more than 2 million, and the above costs have not been included in the levee related costs. . Moreover, the energy consumption required for the operation of the equipment is relatively high. The energy consumption of a 100t/h drum primary cleaning screen is 5.5kW, and the energy consumption of a 50t/h vibrating screen is 3.0kW. Therefore, 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.

Since the screening process of the mesh belt screen is free fall, the lower layer is also very susceptible to clogging in the secondary screening. Traditionally, 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.

In addition, cleaning up small miscellaneous, in order to clean up small rice as an example, 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.

Summary of the invention:

The object of the present invention is to provide a decontamination device with high processing capacity, high processing capacity, low construction height, low construction cost, and efficient separation of impurities, and a method for removing impurities.

The object of the invention is achieved in this way:

The utility model relates to a flat-screening screen with a clear and large mesh, and the composition comprises: a sieve frame, wherein the sieve frame is hung in the sieve frame, and the sieve box is provided with a large medium mesh screen and a small sieve a mesh screen with a sieve, wherein the screen box is connected to a flat-back motion mechanism, and the two sides of the large medium mesh screen and/or the small mesh screen are connected to the side plates through a sealing structure, the large and medium miscellaneous The lower part of the mesh belt screen is provided with a food guiding mechanism, and the large and medium mesh screen and the small mesh screen are connected to the driving mechanism.

The first clear and large mesh belt is flatly sifted, and the two sides of the large medium mesh screen and/or the small mesh screen are connected to the side plates through a sealing structure, and the sealing structure comprises a group a support roller or a support plate connected to the side plate, the edge of the large mesh screen and/or the small mesh screen is placed on the support roller or the support plate, The support rollers are in a single row or in multiple rows.

The first clear large mesh belt is flatly sifted, and the two sides of the large medium mesh screen and/or the small mesh screen are connected to the side plates through a sealing structure, and the sealing structure includes The side panel is connected to the body, and the body has a groove for clamping the edge of the large mesh screen and/or the edge of the small mesh screen, and the body adopts an integral or split structure.

The first clear large mesh belt is flatly sifted, and the two sides of the large medium mesh screen and/or the small mesh screen are connected to the side plates through a sealing structure, and the sealing structure includes The brackets of the side panel connection, the edges of the large mesh screen and/or the small mesh screen have elastic adjustment members that are in contact with the side panels or the brackets.

The first clear large mesh belt is flatly sifted, and the two sides of the large medium mesh screen and/or the small mesh screen are connected to the side plates through a sealing structure, and the sealing structure includes The side panel connecting body, the edge of the large mesh screen and/or the small mesh screen is sandwiched between the body and the elastic pressing member; or the sealing structure includes The body of the side panel connection, the edge of the large mesh screen and/or the small mesh screen extends between the body and the bracket or the idler.

The pre-clearing mesh belt is flat-backed, the food guiding mechanism is an inclined grain guiding plate or a belt conveyor, and the large-medium mesh belt is screened below the screen surface and/or The small mesh belt is provided with a roller under the sieve surface, and the flat return mechanism has a radius of gyration of 4-11 mm and a rotation frequency of 300-450 rpm.

The first clear and large mesh belt is flatly sifted, the large miscellaneous sieve is an annular mesh belt sieve, and the large medium and medium mesh screen has a sieve surface angle of 0-4 degrees, the large and medium-sized The mesh size of the mesh screen is greater than 1.5 times the size of the sieved grain, and the small mesh screen is an annular sieve surface having a composite layer, and the mesh angle of the small mesh screen is 0-5 degrees, the mesh size of the small mesh screen is less than 0.8 times of the size of the sieved grain, and the large and medium mesh screen and the small mesh screen are respectively set in two On the drum mentioned at the end, the drum on one side is connected to the driving mechanism, and the working surfaces of the drum and the roller are glued.

The first clear and large mesh belt is flatly sifted, and the large and medium mesh belt screen is provided with a conveying plate, and the conveying plate is a set of parallel guiding swash plates or discharging to both sides. When the swash plate is used, when the swash plate is used, the large and medium mesh screen of the lower layer is provided with a large impurity output mechanism in the outlet direction.

The first clear and large mesh belt is flatly sifted, the small miscellaneous mesh belt screen is a group, and the small miscellaneous mesh belt screen is provided with a slanted and outgoing sliding skateboard, The mesh belt is inclined to form a v-shaped structure or inclined to both sides of the mesh belt to form an inverted v-shaped structure. If the outgoing sliding plate is a v-shaped structure, the bottom has a spiral discharging mechanism, and the small mixed mesh belt sieve and / or the large and medium mesh belt screen is equipped with a cleaning roller or a cleaning brush, and the small miscellaneous mesh belt sieve is a group, which is respectively a large grain grain mesh sieve, a small grain grain mesh sieve, the The bottom of the deflector has a redirecting plate.

The invention discloses a method for removing grain by using the first-prepared mesh belt flat back sieve, and starts the mesh belt sieve and the flat return mechanism, and the grain first falls onto the large miscellaneous mesh belt sieve, and the straight belt and the rotation of the mesh belt are carried out. The circular motion of the mechanism is sifted under the spiral motion track, and the two sides of the screen surface of the large mesh screen are respectively placed on the sealing structure, and the sealing structure is connected with the side plates, effectively blocking the residue of the screen and being mixed. As the sieve residue, it is discharged; the sieve material enters the small miscellaneous mesh belt through the guide plate, and is sieved under the spiral motion track synthesized by the straight motion of the mesh belt and the circular motion of the rotary mechanism, and the sieve with the small miscellaneous mesh screen The sides of the surface are also placed on the sealing structures on both sides of the surface. The sealing structure on both sides of the small mesh screen is also connected with the side plates, effectively blocking the grain residue from falling, and the grain is collected as a sieve residue. The small substances in the sieve are collected and discharged.

Beneficial effects:

1. The large-scale mesh belt screen of the invention has a high output in the upper mesh belt flat screen, and the same floor space, the single-layer high-processing rice single-stage output can reach 100-300 tons per hour, the same floor space, treatment The ability is increased several times. And we can customize 2000 tons of extra large screens for customers' special needs. In addition, 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. When the screen surface moves to the drum and the screen surface is curved, The blockage in the sieve hole will be pulled out or loosened under the action of the flat back movement. When the screen surface moves downward, the material on the sieve surface will fall due to gravity and peaceful return, thereby achieving the effect of cleaning the screen surface. Can greatly save labor.

The invention adopts a flat screen surface, and can be easily bent around the drum. Since the front line of the sieve contains the flat back movement, the plane screen surface itself is not blocked, and the sieve residue is easy to roll off. In order to prevent the occurrence of roll-off formation of the sieve residue on both sides of the screen surface and the mixing of the undersize objects, the present invention fixes the sealing structure on the side plate, and the sealing structure of the present invention comprises a set of support rollers connected to the side plates or Supporting objects such as support plates or support frames, the edges of the large mesh screen and/or small mesh screens are placed on the supporting objects, and the large mesh screens and/or small mesh screens are supported by the supports. The seal and the support are driven by the drive motor, and the support rollers may be in a single row or in multiple rows.

A sealing structure for another sealing arrangement of the present invention includes a body coupled to the side panel, the body having an edge that grips the large mesh screen edge and/or the small mesh screen The groove, the large mesh belt screen edge and/or the edge of the small mesh screen are in the groove and slide forward along the groove. The body may be of a whole body or a split structure as needed. The sieve residue and the undersize are separated by a sealing device.

A sealing structure of another sealing scheme of the present invention includes a bracket connected to the side panel, the edge of the large mesh screen and/or the small mesh screen having the side panel or the The elastic adjustment member of the bracket contact. The effectiveness of the seal is ensured by an elastomeric seal. The sieve residue and the undersize are separated by a sealing device.

In another sealing scheme of the present invention, the sealing structure is connected to the body of the side plate, and the edge of the large mesh screen and/or the small mesh screen is clamped on the body and the elastic pressing member. Between; to ensure the position of the screen surface by elastic deformation, good sealing. The sieve residue and the undersize are separated by a sealing device.

A sealing structure of another sealing scheme of the present invention includes a body connected to the side panel, the rim of the large mesh screen and/or the small mesh screen extending into the body and the bracket Or between the rollers. There is basically no friction. The sieve residue and the undersize are separated by a sealing device.

The food guiding mechanism of the present invention is an inclined grain guiding plate or a belt conveyor, and the large and medium mesh belt screen surface and/or the small mesh belt screen surface is equipped with a roller, the present Under the screen surface of the invention, a roller is arranged to prevent the screen surface from sinking and deforming. Traditional cleaning screens need 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 lifting height is high. Above 30 meters, the fall of the grain layer is inevitable, and the crushing and downgrading are inevitable, and the energy consumption required for the operation of the equipment is high, so the comprehensive cost is high. The cleaning sieve of the invention has strong screening ability, and can remove large impurities and remove small and medium impurities, and one cleaning sieve can replace the traditional multiple cleaning sieve combination, and does not require a high working tower, thereby reducing food lifting. The height simplifies the configuration, which saves energy consumption and reduces costs, and significantly improves food grade and quality.

The large miscellaneous sieve of the present invention is an annular mesh belt sieve, and the sieve angle of the large medium mesh screen is 0-4 degrees, and the sieve size of the large medium mesh sieve is larger than that of the sieve. 1.5 times or more of the grain size, the small mesh belt sieve is an annular sieve surface having a composite layer, and the sieve mesh angle of the small mesh belt sieve is 0-5 degrees, and the small miscellaneous mesh belt The mesh size of the sieve is less than 0.8 times the size of the sieved grain, and the flat return mechanism has a radius of gyration of 4-11 mm and a swing frequency of 300-450 rpm. Achieve optimal screening parameters.

The two ends of the large and medium mesh screen and the small mesh screen of the present invention are respectively sleeved on the rollers on both ends, and the roller on one side is connected to the driving mechanism, and is driven by the driving mechanism. The side roller ring runs to form a belt transmission structure, and the working surfaces of the roller and the roller have glue hanging, which can significantly increase the friction force, effectively ensure the positioning of the screen, enhance the vibration screening effect of the rotation on the grain, and prevent Sliding and forward work efficiency due to sliding. The drum has a blocking edge, which can effectively overcome the deviation and drift of the conveyor belt and improve the service life of the mesh belt screen.

The lower part of the large and medium mesh belt screen of the invention is provided with a guide grain plate or a belt conveyor, and the sieved objects can be collected and guided to one end, so that the undersize material and the grain are entered from the end of the small mixed sieve, and the whole process is sieved, so that the small impurities can be obtained. More adequate, longer distance screening to improve the screening effect.

The large and medium mesh belt screen of the present invention is provided with a conveying plate, wherein the conveying plate is a set of parallel guiding swash plates, and the grain of the first layer of sieve mesh is concentrated to the starting end of the lower sieve surface. The length of the sieving can be effectively lengthened, and the quality of the sieving can be improved. When the swash plate is used, a large impurity output mechanism is arranged in the outlet direction of the large and medium mesh screen in the lower layer to prevent the sifting. According to the situation of sieving different plant straws, it is sometimes possible to use a discharge slanting plate which discharges to both sides, which can effectively prevent the screening of the secondary screening process.

According to the invention, 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 and outgoing slipperboard, and the splayed skateboard 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. can also be inclined to one side or both sides of the mesh belt (inverted v-shaped structure) In order to facilitate the removal of the undersize material; in order to sift the material with relatively high viscosity of the impurities, in order to update the working performance of the screen, the small mesh screen and/or the large and medium mesh screen are equipped with a cleaning roller or Clean the brush.

The small 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 polymer strip to ensure that the screen surface is in a dense mesh state. Has good rigidity and bending performance.

Due to the difference in grain size of the original grain, 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. In order to share the equipment of the invention for different food types and reduce the processing or storage unit expenditure, the small miscellaneous mesh belt screen of the invention is respectively provided with a large grain grain mesh screen, a small grain grain mesh screen, and is installed at the bottom of the deflecting swash plate. There is a hinged reversing plate, which can be selectively deflected by manually shifting the direction of the reversing plate, and enters a small miscellaneous mesh belt screen of different size sieve holes, and one device completes the process of removing various miscellaneous grains.

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 invention relates to a screening device comprising a large mesh screen and a small mesh screen, and the screening movement is a spiral motion. In order to avoid the mixing of the sundries and grain in the spiral motion, the sides of the screen surface of the large mesh screen and the small mesh screen are respectively placed on the sealing structures on both sides, the sealing structure and the side plates. Connected, effectively blocking the residue of the sieve.

BRIEF DESCRIPTION OF THE DRAWINGS:

Figure 1 is a schematic view of the structure of the product.

Figure 2 is a left side view of Figure 1.

Figure 3 is a schematic view of the structure of the screen box of the product (the parallel conveyor plate is installed in the large medium mesh screen).

Figure 4 is a schematic view showing the structure of the screen box of the product (the inverted medium-shaped belt plate is provided with an inverted v-shaped conveying plate).

Figure 5 is a left side view of Figure 4 (an inverted v-shaped conveyor plate is mounted in the large medium mesh screen).

Figure 6 is an enlarged view of the z-node structure of Figure 5.

Figure 7 is a schematic view showing the structure of the screen box of the product (screw conveyor or small mesh screen as a conveying plate).

Figure 8 is a schematic view of the structure of the screen box of the product (two small miscellaneous screens, the small miscellaneous screen has a v-shaped skid plate, and the inlet has a reversing plate 13).

Figure 9 is a schematic view of the structure of the screen box of the product (2 small miscellaneous screens having an inverted v-shaped slack in the small miscellaneous screen, the inlet having a redirecting plate 13, and the inlet of the small miscellaneous screen having an inlet distribution device 19).

Figure 10 is a left side view of Figure 9 (the split skateboard is an inverted v-shaped structure).

Figure 11 is a plan view of the hybrid skateboard in an inverted v-shaped configuration with a stud 18 in the middle.

Figure 12 is a schematic view of a large mesh belt screen structure with a sealed structure.

Figure 13 is a schematic view of a small mesh belt screen structure of a composite screen surface (removal drive mechanism, power input shaft 21, central circular shape is a schematic view of a dense mesh layer without a small mesh belt screen).

Figure 14 is a schematic view of the detail of the screen surface of the large and medium mesh screen (without coupling and drive).

Figure 15 is a schematic view of a small mesh belt screen having a structure of a punched hole 26 (without a coupling and a driving device).

Figure 16 is a schematic view of the structure of a large mesh screen with a punched 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 mounting structure of the grooved sealing structure, the body of which is integral.

Figure 19 is a schematic view of the mounting structure of the slotted sealing structure, the body of the sealing structure being separate.

Figure 20 is a schematic view showing the mounting structure of the sealing structure with a bracket.

Figure 21 is a schematic view showing the mounting structure of a sealing structure with a bracket.

Figure 22 is a schematic view showing the mounting structure of the sealing structure of the double idler.

Figure 23 is a schematic view showing the mounting structure of the sealing structure including the skirt and the upper baffle.

Figure 24 is a schematic view showing the mounting structure of the sealing structure with the lower portion being the idler and the upper baffle.

Figure 25 is a cross-sectional view taken along line A-A of Figure 24 .

Figure 26 is a schematic view showing the mounting structure of the sealing structure with the lower portion being the idler and the upper portion being the elastic sealing member.

Figure 27 is a schematic view showing the mounting structure of the sealing structure with the lower portion being the bracket.

Figure 28 is a schematic view showing the mounting structure of the sealing structure having the elastic end of the screen.

Detailed ways:

Example 1:

The utility model relates to a flat-screening screen with a clear and complicated mesh, which comprises: a sieve frame 1 in which the sieve box 2 is suspended by a rocker 9, a swing rod or a wire rope, the sieve box The medium and small mesh belt screen 3 and the small miscellaneous net belt screen 4 are installed, and the screen box connecting the flat back movement mechanism 5 provides the screen box with a power source for circular motion in the screen box through the flat back movement mechanism, It is ensured that the sieve residue does not fall on both sides in the flat back movement, and the sides of the large medium mesh screen and/or the small mesh screen are connected to the side plate 22 through the sealing structure 6 in order to improve the small a multi-screening effect, lengthening the length of the screen, the lower portion of the large-sized mesh screen is provided with a food guiding mechanism 7, and the inlet of the small mesh screen is located at the lower end of the food guiding mechanism, so that the whole The grain and the like which are sieved by the large and medium mesh screen are fully screened on the small miscellaneous sieve, and the large and medium mesh screen and the small mesh screen are connected to the driving mechanism 8, and the flat movement is performed. At the same time, the mesh belt is screened.

Example 2:

The first clear and large mesh belt flat back screen described in Embodiment 1, the two sides of the large medium mesh screen and/or the small miscellaneous mesh screen are connected to the side plates through a sealing structure, the sealing structure 6 includes a set of support rollers 61 or support plates 61 connected to the side plates, and the support rollers may be end rollers or full width rollers, which are different according to the width of the mesh belt. The edge of the mesh screen and the small mesh screen may be placed on the support roller or the support plate corresponding thereto, and the single row of support rollers or support plates are horizontally arranged according to the grain specific gravity and the screening thickness. Differently, the spacing of the support rolls needs to be determined according to calculations. The support rolls may be in a single row, and if necessary, a row of second row idler-sidewall anti-wearing rolls perpendicular to the horizontal rolls is arranged on the side walls.

Example 3:

The first clear large mesh belt flat back screen described in Embodiment 1 is connected to the side plates through the sealing structure on both sides of the large medium mesh screen and/or the small mesh screen, the sealing structure 6 Including a body 62 coupled to the side panel, the body having a groove 63 for gripping the edge of the large mesh screen edge and/or the small mesh screen, the large mesh belt Inserting the edge of the sieve edge and/or the small mesh screen into the groove, the body is disposed along the entire length of the side wall of the wall, and the groove and the screen face together form a sieve residue and a sieve space. The isolation space constitutes a sealed structure seal, and the body may adopt an integral structure or a split structure, and the upper and lower parts are fastened together, and are connected by a mechanical structure. Of course, the length direction may also be a plurality of segmented bodies, which facilitate partial maintenance. .

Example 4:

The first clear large mesh belt flat back screen described in Embodiment 1, the two sides of the large medium mesh screen and/or the small miscellaneous mesh screen are connected to the side plates through a sealing structure, and the sealing structure comprises a bracket 64 connected to the side panel, the edge of the large mesh screen and/or the small mesh screen has a resilient adjusting member 65 in contact with the side panel or the bracket, The space between the edge of the large mesh screen and/or the small mesh screen and the bracket is closed by elastic force to form a sealing structure.

Example 5:

The first clear large mesh belt flat back screen described in Embodiment 1, the two sides of the large medium mesh screen and/or the small miscellaneous mesh screen are connected to the side plates through a sealing structure, and the sealing structure comprises a body 66 connected to the side panel, the edge of the large mesh screen and/or the small mesh screen is sandwiched between the body and the elastic pressing member 67, and the elastic force is closed The space between the edge of the large mesh screen and/or the small mesh screen and the body 66 constitutes a sealed structure.

Example 6

The first clear large mesh belt flat back screen described in Embodiment 1, the sealing structure comprises a body 68 connected to the side plate, the large mesh belt screen and/or the small mesh screen The rim extends between the body and the bracket 69 or the idler. The space between the edge of the large mesh screen and/or the small mesh screen and the body 68 is closed by elastic force to form a sealing structure.

Example 7

The first clearing mesh belt of the

embodiment

1 or 2 or 3 or 4 or 5 or 6 is a flat screen, the food guiding mechanism 7 is an inclined grain guiding plate or a belt conveyor, the large A roller is arranged under the sieve surface of the medium mesh screen and/or below the small mesh belt screen surface, and the radius of rotation of the flat return mechanism is 4-11 mm, and the rotation frequency is 300-450 rpm. .

Example 8

The first clearing mesh belt of the

embodiment

1 or 2 or 3 or 4 or 5 or 6 or 7 is a flat screen, the large mixed sieve is an annular mesh belt sieve, and the large medium mesh screen is sieved. The sieve surface angle is 0-4 degrees, and the sieve size of the large medium mesh screen is more than 1.5 times that of the sieved grain size, and the small mesh belt sieve is a ring-shaped sieve with a composite layer. In the surface, the mesh angle of the small mesh screen is 0-5 degrees, and the mesh size of the small mesh screen is less than 0.8 times of the size of the sieved grain to achieve the best screening effect.

The large medium mesh screen and the small mesh screen are respectively sleeved on the rollers on both ends, and the roller on one side is connected to the driving mechanism 8, the roller and the drum The working faces of the rollers are all glued.

Example 9

The first clearing of the mesh belt of the

embodiment

1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 is carried out, wherein the large medium mesh belt screen is provided with a conveying plate 12, The conveying plate is a set of parallel guiding swash plates or discharging slanting plates which are discharged to both sides. When the guiding swash plate is used, the outlet direction of the large and medium mesh screens located in the lower layer is large Output mechanism 15.

Example 10:

Embodiment

1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 of the first clear mesh belt flat screen, the small mesh belt screen is a group, the small miscellaneous The mesh belt screen is provided with a slanting and outgoing slide plate 17, and the splayed slide plate may have a set of slide plates arranged in parallel along the mesh belt; or two cross-slide plates may be arranged obliquely opposite to each other to form a v-shaped structure. If it is a v-shaped structure, the bottom has a spiral discharge mechanism 18.

The detaching slide plate can also be inclined to the two sides of the mesh belt to form an inverted v-shaped structure, and the small impurities are discharged to the impurity removing passages 16 on both sides of the mesh belt.

For the volume-bonded material, the small mesh belt screen and/or the large medium-sized mesh belt screen is equipped with a cleaning roller or a cleaning brush, and the small miscellaneous mesh belt screen is a group, respectively The grain grain net has a sieve, the small grain grain net has a sieve, and the bottom of the guide swash plate has a redirection plate 13 .

Example 11

The invention discloses a method for removing impurities by using a first-prepared mesh belt flat back sieve according to one of the embodiments 1-10, and starts a mesh belt sieve and a flat return mechanism, and the grain first falls onto the large miscellaneous mesh belt sieve. Under the spiral motion track synthesized by the straight motion of the mesh belt and the circular motion of the rotary mechanism, the two sides of the screen surface of the large mesh screen are respectively placed on the sealing structure, and the sealing structure is connected with the side plates to effectively block the sieve residue. The large amount of debris is discharged, and the large amount is discharged as a sieve residue; the sieved material enters the small miscellaneous mesh belt through the guide plate, and is sieved under the spiral motion track synthesized by the straight motion of the mesh belt and the circular motion of the rotary mechanism. The sides of the screen surface of the small mesh screen are also placed on the sealing structures on both sides of the screen. The sealing structure on both sides of the small mesh belt screen is also connected with the side plates, effectively blocking the sediment residue and grain falling, and the grain as a sieve. The remaining objects are collected into the warehouse, and the small objects are collected and discharged.

Example 12

A pre-clear mesh belt flat return screen according to any one of embodiments 1 to 10, comprising: a sieve frame, wherein the sieve frame is connected to the sieve box by a boom or a rocker or a rocker, The sieve box is provided with a set of small miscellaneous mesh belt sieves and large and medium miscellaneous mesh belt screens, and the small miscellaneous mesh belt screen and the large medium miscellaneous mesh belt screen are provided with a flat return mechanism, and the small miscellaneous mesh belt screen a skid plate having an inclined surface below 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 In the grain entrance, each layer of small miscellaneous sieve corresponds to 1-3 said feeding openings, and the sieve surface of the small miscellaneous mesh screen is intersected with the hard wire cleaning roller, and the small miscellaneous mesh belt sieve One side is equipped with a suction and suction device.

Claims

The utility model relates to a flat-screening screen with a clear and large mesh, which comprises: a sieve frame, wherein the sieve frame is hung in the sieve frame, and the sieve box is equipped with a large and medium mesh a screen and a small mesh screen, the screen box is connected to a flat back movement mechanism, and the sides of the large medium mesh screen and/or the small mesh screen are connected to the side plates through a sealing structure, The lower part of the large and medium mesh screen is equipped with a food guiding mechanism, and the large and medium mesh screen and the small mesh screen are connected to the driving mechanism.
The pre-clearing mesh belt flat return screen according to claim 1, wherein: the large and medium mesh screen and/or the small miscellaneous mesh screen are connected to the side plates through a sealing structure. The sealing structure comprises a set of support rollers or support plates connected to the side plates, the edges of the large mesh screen and/or the small mesh screens are placed on the support rollers or the On the support plate, the support rollers are in a single row or in multiple rows.
The flat clear screen of the first clear large mesh belt according to claim 1, wherein: the sides of the large and medium mesh screen and/or the small mesh screen are connected to the side plates through a sealing structure. The sealing structure comprises a body connected to the side plate, the body having a groove for clamping the edge of the large mesh screen and/or the edge of the small mesh screen, the body adopting Whole or split structure.
The flat clear screen of the first clear large mesh belt according to claim 1, wherein: the sides of the large and medium mesh screen and/or the small mesh screen are connected to the side plates through a sealing structure. The sealing structure includes a bracket connected to the side panel, and the edge of the large mesh screen and/or the small mesh screen has elasticity of contact with the side panel or the bracket Adjustments.
The flat clear screen of the first clear large mesh belt according to claim 1, wherein: the sides of the large and medium mesh screen and/or the small mesh screen are connected to the side plates through a sealing structure. The sealing structure includes a body connected to the side plate, and the edge of the large mesh screen and/or the small mesh screen is sandwiched between the body and the elastic pressing member; or The sealing structure includes a body coupled to the side panel, the rim of the large mesh screen and/or the small mesh screen extending between the body and the bracket or the idler.
The pre-clearing mesh belt flat return screen according to claim 1 or 2 or 3 or 4 or 5, wherein the food guiding mechanism is an inclined grain guide or a belt conveyor, The roller belt is arranged under the screen surface of the large medium mesh belt and/or the small mesh belt screen surface, and the turning radius of the flat return mechanism is 4-11 mm, and the rotation frequency is 300-450 revolutions. /minute.
The pre-clear mesh belt flat return screen according to claim 1 or 2 or 3 or 4 or 5 or 6, wherein the large miscellaneous sieve is an annular mesh belt sieve, and the large and medium miscellaneous The screen angle of the mesh belt screen is 0-4 degrees, and the sieve size of the large medium mesh screen is larger than 1.5 times of the size of the sieved grain, and the small mesh belt sieve has a ring shape and has a composite The sieve surface of the layer, the sieve angle of the small mesh screen is 0-5 degrees, and the sieve size of the small mesh sieve is less than 0.8 times the size of the sieved grain, the large The medium mesh screen and the small mesh screen are respectively placed on the rollers on both ends, and the roller on one side is connected to the driving mechanism, and the roller and the roller work. There are hanging glue on the surface.
The pre-clearing mesh belt flat return screen according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, wherein: the large medium mesh belt screen is provided with a conveying plate, The conveying plate is a set of parallel guiding swash plates or a discharging slanting plate for discharging to both sides. When the guiding swash plate is used, the outlet of the large and medium mesh belt sifting in the lower layer is installed. Large miscellaneous output mechanism.
The pre-clear mesh belt flat return screen according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 wherein: said small miscellaneous mesh belt screen is a group, said The small miscellaneous mesh belt screen is provided with a slanted and outgoing slippery slide plate, and the detached slide plate is inclined along the mesh belt to form a v-shaped structure or inclined to both sides of the mesh belt to form an inverted v-shaped structure. Is a v-shaped structure, the bottom has a spiral discharge mechanism, the small mesh belt screen and/or the large medium mesh screen is equipped with a cleaning roller or a cleaning brush, and the small mesh belt sieve is One group is a large grain grain net with a sieve, a small grain grain net with a sieve, and the bottom of the deflector has a reversing plate.
The invention relates to a method for removing grain by using a clear-back mesh belt backing sieve according to any one of claims 1-9, which is characterized in that: the mesh belt sieve and the flat return mechanism are started, and the grain first falls into the large miscellaneous net. The screen is sieved under the spiral motion track of the straight motion of the mesh belt and the circular motion of the rotary mechanism. The two sides of the screen surface of the large mesh screen are respectively placed on the sealing structure, and the sealing structure is connected with the side plate. Effectively block the residue of the sieve, and discharge it as a sieve residue; the sieve material enters the small mesh belt through the guide plate, and is under the spiral motion track of the straight motion of the mesh belt and the circular motion of the rotary mechanism. After sieving, the sides of the screen surface of the small mesh screen are also placed on the sealing structures on both sides of the screen. The sealing structure on both sides of the small mesh screen is also connected with the side plates, effectively blocking the leftovers of the sieve. The grain is collected into the warehouse as a sieve residue, and the small objects in the sieve are collected and discharged.