Compound double-structure classificator

Abstract

The utility model discloses a compound double-structure classificator which comprises a grain discharging hopper, a feeding hopper arranged above the grain discharging hopper and two selecting units symmetrically arranged on the two sides of the grain discharging hopper, each selecting unit comprises a machine frame, an air chamber, a specific gravity table and a horizontal air screen, the air chamber, the specific gravity table and the horizontal air screen are sequentially connected to the machine frame from bottom to top, and a first fan is arranged in the air chamber. Due to the fact that the two concentration units run in parallel, the yield can be increased. On the premise that the yield is met, the power of each motor and each fan in a single concentration unit can be reduced, so that the single concentration unit is smaller in size, smaller in power, more stable in operation and lower in noise. Due to the fact that the size of the single selection unit is reduced, the selection unit can be used as a module to be produced in a factory, then transported and assembled according to the required yield after the selection unit is conveyed to the site, the production, transportation and assembly efficiency can be greatly improved, and debugging is more convenient and rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of grain machinery, in particular to a compound double-structured grain selector. Background Art

[0002] As grain production increases, the required grain sorting machine has a larger processing capacity. Especially for large grain processing plants, in order to improve the efficiency of grain processing, the grain processing output per unit time will be very large.

[0003] Therefore, the grain separator has a large processing capacity per unit time, requiring a larger air separator, gravity table, and fan. The corresponding supporting power will be increased accordingly, resulting in the grain separator being bulky and difficult to transport. Therefore, these large grain separators usually need to be disassembled after factory testing, then transported to the site for assembly and commissioning. The on-site assembly conditions are sometimes limited, making on-site assembly very inconvenient and inefficient.

[0004] In addition, these large grain sorting machines consume huge amounts of electricity. Once the working conditions change, such as the required processing volume decreases, the grain sorting machines need to run at full power, resulting in a waste of electricity.

[0005] The patent application with publication number CN210115244U discloses a compound specific gravity separator, which divides the material into two streams through the feed box and enters the grading screen for screening respectively. The multi-layer screen in the grading screen plays the role of grading and selecting the two streams of material separately to increase the output. Since it is installed on the same frame and uses the same grading screen and specific gravity table, if the output is too large, it will lead to a large volume and need to be disassembled at the factory and then assembled on site, which is inconvenient to transport and assemble. The patent with publication number CN220941737U discloses an efficient and large-flow grain separator, which is also set in the same frame and uses a set of cleaning devices to clean the grain, so it also has the above-mentioned problems. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a compound double-structured grain selector, which is used to solve the problem that the current large-scale grain selectors need to be disassembled before leaving the factory and then assembled on site, resulting in inconvenience in transportation and installation and low installation efficiency.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A compound double-structure concentrator comprises a grain hopper, an upper hopper arranged above the grain hopper, and two concentrating units symmetrically arranged on both sides of the grain hopper. Each concentrating unit comprises a frame, an air chamber, a specific gravity table and a horizontal air screen connected to the frame from bottom to top. A first fan is provided in the air chamber. The grain hopper and the upper hopper are both fixedly connected to the frame. The feed ends of the horizontal air screen are both facing inward. There are two dropouts at the bottom of the upper hopper, and the two dropouts correspond to the feed ends of the corresponding horizontal air screens respectively. The specific gravity finished product outlets of the two specific gravity tables correspond to the openings at the top of the grain hopper.

[0009] Furthermore, the upper hopper is fixedly connected to a bulk material feeding device at each dropout port, and each bulk material feeding device includes a cylinder, the top and side of the cylinder are provided with openings, and the bottom is sealed, the top of the cylinder corresponds to the dropout port of the upper hopper, the side of the cylinder is fixedly connected to the horizontal air screen, and the opening on the side of the cylinder corresponds to the feeding end of the horizontal air screen.

[0010] Furthermore, an upper bulk plate and a lower bulk plate are fixedly connected in sequence in the cylinder from top to bottom, the lower bulk plate and the bottom of the cylinder are both inclined and in opposite directions, the upper bulk plate and the lower bulk plate are staggered, and the opening on the side of the cylinder is located at a low point on the bottom of the cylinder.

[0011] Furthermore, the upper hopper includes a silo at the top and two drop pipes arranged in a herringbone shape at the bottom of the silo, and both drop pipes are provided with a plug plate for adjusting the material flow in the drop pipes.

[0012] Furthermore, it also includes a dust collector and a second fan connected to the air outlet of the dust collector. The horizontal air screens of the two selection units are both provided with wind covers, and the wind covers are both connected to the air inlet of the dust collector.

[0013] Furthermore, the top of the grain hopper is trapezoidal, and the openings are located at positions corresponding to the sides of the grain hopper and the trapezoid.

[0014] Furthermore, it includes an impurity collecting conveyor, and the frame is also fixedly connected with a vertical outlet pipe for screening large impurities, an outlet pipe for screening small impurities, an outlet pipe for gravity selection of light impurities and an outlet pipe for air selection of small impurities. The upper ends of the outlet pipe for screening large impurities, the upper ends of the outlet pipe for screening small impurities and the upper ends of the outlet pipe for air selection of small impurities respectively correspond to the impurity outlets corresponding to the horizontal air screen, the upper end of the outlet pipe for gravity selection of light impurities corresponds to the outlet of the gravity table for light impurities, and the lower ends of the outlet pipe for screening large impurities, the lower end of the outlet pipe for screening small impurities, the lower end of the outlet pipe for gravity selection of light impurities and the lower end of the outlet pipe for air selection of small impurities respectively correspond to the impurity collecting conveyor.

[0015] The positive effects of this utility model are:

[0016] This utility model adopts a dual structure, namely, two fine-graining units, to increase production. Each fine-graining unit comprises a frame, an air chamber fixedly connected to the frame from bottom to top, a specific gravity table, and a horizontal air screen. The parallel operation of the two fine-graining units increases production. While maintaining production capacity, the power of each motor and fan in a single fine-graining unit can be reduced, resulting in a smaller unit with lower power consumption, more stable operation, and lower noise. The reduced size of a single fine-graining unit allows the units to be manufactured as modules in a factory, then transported and assembled on-site according to the required production capacity. This significantly improves production, transportation, and assembly efficiency, and also facilitates and speeds commissioning. When the processing capacity of a single fine-graining unit meets production requirements, only one can be operated. While still meeting production requirements, this reduces power consumption and thus production costs. The utility model also features an impurity collection conveyor, which collects and discharges impurities emitted during operation, significantly reducing the workload of handling impurities and saving a significant amount of labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the appearance of the utility model;

[0018] Figure 2 yes Figure 1 Schematic diagram of the appearance after removing the frame, dust collector, and second fan;

[0019] Figure 3 It is a structural diagram of a bulk material feeding device;

[0020] Figure 4 It is a schematic diagram of the position between the upper hopper and the bulk material feeding device;

[0021] Figure 5 This is a schematic diagram of the position between the grain hopper and the specific gravity table;

[0022] Figure 6 This is a schematic diagram of the positions of the large impurities outlet pipe, the screening small impurities outlet pipe, the gravity separation light impurities outlet pipe, the air separation small impurities outlet pipe and the impurity collection conveyor;

[0023] In the picture:

[0024] 1. Frame; 2. Large impurity discharge port; 3. Horizontal air screen; 4. Connecting air duct; 5. Bulk material feeding device; 6. Upper hopper; 7. Dust collector; 8. Second fan; 9. Impurity collection conveyor; 10. Grain discharge hopper; 11. Outlet pipe for air separation of small impurities; 12. First fan; 13. Air chamber; 14. Outlet pipe for gravity separation of light impurities; 15. Outlet pipe for screening small impurities; 16. Outlet pipe for screening large impurities; 17. Specific gravity table; 18. Cylinder; 19. Upper bulk plate; 20. Lower bulk plate; 21. Silo; 22. Dropping pipe; 23. Insert plate. DETAILED DESCRIPTION

[0025] Example 1

[0026] like Figure 1 and Figure 2 As shown, a composite double-structure concentrator comprises a grain hopper 10, an upper hopper 6 positioned above the hopper 10, and two concentrating units symmetrically positioned on either side of the hopper 10. Each concentrating unit comprises a frame 1, an air chamber 15 fixedly connected to the frame 1, a specific gravity table 17, and a horizontal air screen 3, from bottom to top. The air chamber 15 houses a first fan 12. The structure and operating principles of the specific gravity table 17 and the horizontal air screen 3 are conventional and will not be further described here.

[0027] The grain discharge hopper 10 and the upper hopper 6 are both fixedly connected to the frame 1, the feed ends of the horizontal air screen 3 are both inward, and there are two dropouts at the bottom of the upper hopper 6, which correspond to the feed ends of the corresponding horizontal air screen 3 respectively, and the specific gravity finished product outlets of the two specific gravity tables 17 correspond to the openings at the top of the grain discharge hopper 10.

[0028] The upper hopper 6 includes a silo 21 at the top and two drop pipes 22 arranged in a herringbone shape at the bottom of the silo 21. Both drop pipes 22 are provided with an insert plate 23. By moving the insert plate 23, the flow rate of the material in the drop pipe 22 can be adjusted to adjust the output of the two selecting units so that the output of the two selecting units is close, the operation is more stable, and the load difference of the two selecting units due to the large difference in output is avoided.

[0029] This utility model utilizes two concentrating units operating in parallel to increase production. While maintaining production capacity, the power of a single concentrating unit can be reduced, resulting in a smaller, more power-efficient unit with more stable operation. Due to the reduced size of the individual concentrating units, the units can be manufactured and transported as modules, which can then be assembled on-site according to the required production capacity. This significantly improves transportation and assembly efficiency, and also makes commissioning more convenient and rapid.

[0030] When the processing capacity of a selection unit can meet the production demand, only one selection unit can be operated. While meeting the production demand, the power consumption can be reduced, thereby reducing production costs.

[0031] Example 2

[0032] Combine Figures 3 to 5 As shown, the difference between this embodiment and embodiment 1 is that:

[0033] The upper hopper 6 is fixedly connected to a bulk material feeding device 5 at each drop-out location. Each bulk material feeding device 5 includes a cylindrical body 18 made of steel sheet metal with a rectangular cross-section. The top and side of the cylindrical body 18 are provided with openings, and the bottom of the cylindrical body 18 is blocked. Two drop-out pipes are respectively inserted into the top of the corresponding cylindrical body 18, and there is a gap between the drop-out pipes and the corresponding cylindrical body 18. The side of the cylindrical body 18 is fixedly connected to the corresponding horizontal air screen 3, and the opening on the side of the cylindrical body 18 corresponds to the feed end of the horizontal air screen 3. The top of the grain hopper 10 is trapezoidal, and the openings are respectively located at positions corresponding to the sides of the grain hopper 10 and the trapezoid.

[0034] An upper bulk plate 19 and a lower bulk plate 20 are fixedly connected to the cylinder 18 from top to bottom. The lower bulk plate 20 and the bottom of the cylinder 18 are both inclined and inclined in opposite directions. The upper bulk plate 19 and the lower bulk plate 20 are staggered, and the opening on the side of the cylinder 18 is located at the bottom of the cylinder 18.

[0035] The grain to be screened is sent to the upper hopper 6 by the elevator, and then falls into the corresponding bulk material feeding device 5 from the two drop pipes at the bottom of the upper hopper 6. After that, it passes through the upper bulk plate 19 and the lower bulk plate 20 in turn, and is dispersed and enters the corresponding horizontal air screen 3 for screening.

[0036] The utility model also includes a dust collector 7 and a second fan 8 connected to the air outlet of the dust collector 7. The horizontal air screens 3 of the two selection units are both provided with air covers, and the air covers are both connected to the air inlet of the dust collector 7. The two air covers are connected by a connecting air duct 4, and the connecting air duct 4 is connected to the dust collector.

[0037] Example 3

[0038] Combine Figure 6 As shown, the difference between this embodiment and embodiment 2 is that:

[0039] The present invention further comprises an impurity collecting conveyor 9 at the bottom of the frame 1, the impurity collecting conveyor 9 being a belt conveyor. Furthermore, a vertical outlet pipe 16 for screening large impurities, an outlet pipe 15 for screening small impurities, an outlet pipe 14 for gravity selection of light impurities, and an outlet pipe 11 for air separation of small impurities are fixedly connected to the frame 1. The upper ends of the outlet pipe 16 for screening large impurities, the upper ends of the outlet pipe 15 for screening small impurities, and the upper ends of the outlet pipe 11 for air separation of small impurities correspond to the impurity outlets of the horizontal air screen 3, respectively. The upper end of the outlet pipe 14 for gravity selection of light impurities corresponds to the light impurity outlet of the gravity table 17, and the lower ends of the outlet pipe 16 for screening large impurities, the lower ends of the outlet pipe 15 for screening small impurities, the lower ends of the outlet pipe 14 for gravity selection of light impurities, and the lower ends of the outlet pipe 11 for air separation of small impurities are respectively located above the belt of the belt conveyor.

[0040] The impurities discharged from the large impurity screening outlet pipe 16, the small impurity screening outlet pipe 15, the gravity separation light impurity outlet pipe 14 and the air separation small impurity outlet pipe 11 can be collected together by the impurity collection conveyor 9 and then discharged uniformly, thereby greatly reducing the workload of collecting impurities and saving a lot of labor. In addition, the grain discharge port at the bottom of the grain hopper 10 can also be equipped with a belt conveyor to transport the selected grain.

[0041] The above-mentioned embodiments are described in a relatively detailed and specific manner, expressing preferred embodiments of the present invention. They are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. However, they are not limited to the present invention alone, and the patent scope of the present invention cannot be limited solely by these embodiments. That is, any equivalent changes or modifications made to the spirit disclosed by the present invention, for researchers or technicians in this field, without departing from the structure of the present invention, local improvements within the system and changes and conversions between subsystems, etc., are still within the patent scope of the present invention.

Claims

1. A compound double-structure concentrator, characterized in that: The invention comprises a grain discharge hopper (10), an upper hopper (6) arranged above the grain discharge hopper (10), and two selecting units symmetrically arranged on both sides of the grain discharge hopper (10), each selecting unit comprising a frame (1), an air chamber (13) connected to the frame (1) in sequence from bottom to top, a specific gravity table (17), and a horizontal air screen (3), wherein a first fan (12) is provided in the air chamber (13), the grain discharge hopper (10) and the upper hopper (6) are both fixedly connected to the frame (1), the feed end of the horizontal air screen (3) is both inwardly facing, the upper hopper (6) has two blanking ports at the bottom, the two blanking ports respectively corresponding to the feed end of the corresponding horizontal air screen (3), and the specific gravity finished product outlets of the two specific gravity tables (17) both correspond to the opening at the top of the grain discharge hopper (10).

2. A compound double-structure concentrator according to claim 1, characterized in that: The upper hopper (6) is fixedly connected to a bulk material feeding device (5) at each drop opening. Each bulk material feeding device (5) includes a cylinder (18). The top and side of the cylinder (18) are provided with openings, and the bottom is blocked. The top of the cylinder (18) corresponds to the drop opening of the upper hopper (6). The side of the cylinder (18) is fixedly connected to the horizontal air screen (3). The opening on the side of the cylinder (18) corresponds to the feeding end of the horizontal air screen (3).

3. A compound double-structure concentrator according to claim 2, characterized in that: An upper bulk plate (19) and a lower bulk plate (20) are fixedly connected in sequence from top to bottom in the cylinder (18). The lower bulk plate (20) and the bottom of the cylinder (18) are both inclined and inclined in opposite directions. The upper bulk plate (19) and the lower bulk plate (20) are staggered, and the opening on the side of the cylinder (18) is located at a low point on the bottom of the cylinder (18).

4. A compound double-structure concentrator according to claim 1, characterized in that: The upper hopper (6) comprises a silo (21) at the top and two drop pipes (22) arranged in a herringbone shape at the bottom of the silo (21). Both drop pipes (22) are provided with a plug plate (23) for adjusting the flow of materials in the drop pipes (22).

5. The compound double-structure concentrator according to claim 1, characterized in that: It also includes a dust collector (7) and a second fan (8) connected to the air outlet of the dust collector (7). The horizontal air screens (3) of the two selection units are both provided with wind covers, and the wind covers are both connected to the air inlet of the dust collector (7).

6. A compound double-structure concentrator according to claim 1, characterized in that: The top of the grain discharging hopper (10) is trapezoidal, and the openings are located at positions of the grain discharging hopper (10) corresponding to the sides of the trapezoid.

7. The compound double-structure concentrator according to claim 1, characterized in that: The machine also includes an impurity collecting conveyor (9). The frame (1) is also fixedly connected with a vertical large impurity screening outlet pipe (16), a small impurity screening outlet pipe (15), a gravity selection light impurity outlet pipe (14) and an air selection small impurity outlet pipe (11). The upper ends of the large impurity screening outlet pipe (16), the upper ends of the small impurity screening outlet pipe (15) and the upper ends of the air selection small impurity outlet pipe (11) respectively correspond to the corresponding impurity outlets of the horizontal air screen (3). The upper end of the gravity selection light impurity outlet pipe (14) corresponds to the gravity light impurity outlet of the gravity table (17). The lower ends of the large impurity screening outlet pipe (16), the lower ends of the small impurity screening outlet pipe (15), the lower ends of the gravity selection light impurity outlet pipe (14) and the lower ends of the air selection small impurity outlet pipe (11) respectively correspond to the impurity collecting conveyor (9).

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