A scraper screening conveyor

Abstract

A scraper screening conveyor, comprising an arc scraper conveyor and a reject recovery assembly. A circular scraper assembly is provided on the arc scraper conveyor. The conveying surface at the upper end of the arc scraper conveyor is arc-shaped. The circular scraper assembly includes an arc cover installed at the upper end of the arc scraper conveyor frame and a scraper installed inside the arc cover. A discharge hopper is connected to the left end of the arc cover. A screening assembly is connected to the lower side of the discharge hopper. The screening assembly includes an arc-shaped sliding screen section. A broken material outlet and a material outlet are respectively provided on the left side and the right side of the sliding screen section. The broken material outlet is connected to a first broken material conveying device or a second broken material conveying device. A discharge conveyor is provided on the lower side of the material outlet. The structure of the present invention is ingenious and novel. By improving the traditional arc scraper conveyor and adding a screening assembly and a reject recovery assembly, when used in cooperation with a threshing machine, the proportion of qualified products can be increased by more than 1%, and the floor area can be saved.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco processing, and particularly relates to a scraper screening conveyor. Background Art

[0002] In the tobacco leaf threshing and redrying production line and the air separation and impurity removal line, a scraper feeder is generally provided, and its function is to evenly feed materials (tobacco products) into the next-level equipment. Among these materials, about 1% of the leaves and fines smaller than 6.35 mm will enter the next-level equipment.

[0003] In the tobacco industry standard, the grading regulations for the quality of threshed tobacco leaves are as follows: leaves with a side length greater than 12.7 mm are called large and medium-sized leaves, leaves with a side length of 2.36 - 6.35 mm are called fragments, and leaves with a side length smaller than 2.36 mm are called fines; the quality requirements for the threshing process are: the fragment rate of superior tobacco is not more than 4%, the fragment rate of medium tobacco is not more than 5%, the fragment rate of inferior and low-grade tobacco is not more than 6%, and the fines are not more than 1.3%.

[0004] If the fragments and fines can be separated in the scraper conveying link, it means that about 1% of the unqualified products are removed at the feeding end of the thresher. Taking a thresher with a capacity of 6000 kg / h as an example, working 12 hours a day can reduce 720 kg of fragments and fines from entering the thresher. This is not only beneficial to avoiding further breakage of this part of the materials, but more importantly, removing 1% of the unqualified products at the feeding end of the thresher will at least increase the proportion of qualified products at the outlet end by 1%. And this data is one of the core processing parameters of the redrying enterprise, which will bring comprehensive advantages such as the enterprise's reputation and market share.

[0005] Therefore, a scraper screening conveyor is needed to solve this problem. Summary of the Invention

[0006] In view of the above situation, in order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a scraper screening conveyor without adding other screening devices and floor space, which effectively solves the above problems.

[0007] The technical solution it adopts is that the present invention includes an arc scraper conveyor, on which a circular scraper assembly is provided. The upper conveying surface of the arc scraper conveyor is arc-shaped. The circular scraper assembly includes an arc cover installed at the upper end of the arc scraper conveying frame and a scraper installed in the arc cover. The left end of the arc cover is connected with a discharge hopper, and a screening assembly is connected to the lower side of the discharge hopper. The screening assembly includes an arc-shaped chute screening section. A fine material outlet and a material outlet are respectively provided on the left side and the right side of the chute screening section. The fine material outlet is connected with a first fine material conveying device or a second fine material conveying device, and a discharge conveyor is provided on the lower side of the material outlet.

[0008] The beneficial effects of the present invention are as follows: The structure of the present invention is ingenious and novel. By improving the traditional arc scraper conveyor and adding a screening component and a reject recycling component, when used in conjunction with a leaf thresher, the proportion of qualified products can be increased by more than 1%, and good and significant economic benefits can be achieved. In addition, by arranging the screening component and the reject recycling component on the lower side of the arc scraper conveyor, the land area can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural diagram of the present invention

[0010] Figure 2 is a front view of the first embodiment of the present invention.

[0011] Figure 3 is a front view of the second embodiment of the present invention.

[0012] Figure 4 is a schematic structural diagram of the folding screening device of the present invention.

[0013] Figure 5 is a schematic structural diagram of the folding bin screening device of the present invention.

[0014] Figure 6 is a schematic structural diagram of the first shredding material conveying device of the present invention.

[0015] Figure 7 is a schematic structural diagram of the second shredding material conveying device of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following further details the specific embodiments of the present invention with reference to the accompanying drawings.

[0017] Embodiment 1:

[0018] Composed of Figure 1 , Figure 2 , Figure 4 and Figure 6Provided, the present invention includes an arc scraper conveyor 1, on which a circular scraper assembly is provided. The conveying surface at the upper end of the arc scraper conveyor 1 is arc-shaped. The circular scraper assembly includes an arc cover 2 installed at the upper end of the conveying frame of the arc scraper 3 and a scraper 3 installed inside the arc cover 2. The left end of the arc cover 2 is connected to a discharge hopper 4. By rotating the scraper 3, the material transported by the scraper 3 conveyor is scraped into the discharge hopper 4. A screening assembly is connected to the lower side of the discharge hopper 4. The screening assembly includes an arc-shaped chute screening section 5. The upper end of the chute screening section 5 is connected to the discharge hopper 4. A broken material outlet 6 and a material outlet 7 are respectively provided on the left side and the right side of the chute screening section 5. The broken material outlet 6 is connected to a first broken material conveying device or a second broken material conveying device. A discharge conveyor 8 is provided below the material outlet 7. Fragments smaller than 6.35 mm square in the material falling on the chute screening section 5 are transported and collected by the first broken material conveying device or the second broken material conveying device through the broken material outlet 6, while fragments larger than 6.35 mm square slide along the chute screening section 5 to the discharge conveyor 8 for collection and conveyance.

[0019] The screening assembly further includes a housing 9. The chute screening section 5 is a folding screen separator, which includes an arc-shaped first screen provided on the housing 9. A straight plate 11 inclined downward is provided at the lower end of the first screen. An acute angle is formed between the straight plate 11 and the first screen, that is, after the fragments pass through the first screen and fall on the straight plate 11, they fall again.

[0020] The first screen includes an arc-shaped plate 10, on which a plurality of through slots 12 are evenly distributed. The width of the through slots 12 is 2 - 10 mm, and the interval between two through slots 12 is 2 - 20 mm.

[0021] The first broken material conveying device includes a broken material bin 13. The upper end of the broken material bin 13 is connected to the lower end of the straight plate 11 extending out of the housing 9. The lower end of the broken material bin 13 is connected to a rotary feeder 14. The lower end of the rotary feeder 14 is connected to a Venturi conveyor 15. A compressed air source 16 is connected to the left end of the Venturi conveyor 15. A pneumatic conveying pipeline 17 is connected to the right end of the Venturi conveyor 15 to convey the fragments.

[0022] An opening and closing door 18 is further provided above the discharge conveyor 8. A buffer bin 19 is formed between the opening and closing door 18 and the housing 9, which can enable the material to accumulate in the buffer bin 19. After accumulating to a certain volume, it is conveyed by the discharge conveyor 8, which can save energy.

[0023] A frame 20 is further provided at the lower end of the discharge conveyor 8.

[0024] The pressure provided by the compressed air source 16 is greater than or equal to 0.1 MPa.

[0025] Embodiment 2:

[0026] Given by Figure 3 , Figure 5 and Figure 7 The present invention includes an arc scraper conveyor 1, on which a circular scraper assembly is provided. The upper conveying surface of the arc scraper conveyor 1 is arc-shaped. The circular scraper assembly includes an arc cover 2 installed at the upper end of the conveying frame of the arc scraper 3 and a scraper 3 installed inside the arc cover 2. The left end of the arc cover 2 is connected to a discharge hopper 4. By rotating the scraper 3, the scraper 3 scrapes the materials transported by the scraper 3 conveyor to the discharge hopper 4. A screening assembly is connected to the lower side of the discharge hopper 4. The screening assembly includes an arc-shaped chute screening section 5. The upper end of the chute screening section 5 is connected to the discharge hopper 4. A broken material outlet 6 and a material outlet 7 are respectively provided on the left side and the right side of the chute screening section 5. The broken material outlet 6 is connected to a second conveying device. A discharge conveyor 8 is provided under the material outlet 7. Fragments smaller than 6.35 mm square in the materials falling on the chute screening section 5 are transported and collected by the first broken material conveying device or the second broken material conveying device through the broken material outlet 6, while fragments larger than 6.35 mm square slide along the chute screening section 5 to the discharge conveyor 8 for collection and conveyance.

[0027] The screening assembly further includes a housing 9. The chute screening section 5 is a bin type screening device. The bin type screening device includes a trapezoidal aggregator 21. An aggregating port 22 is provided at the upper end of the aggregator 21. A second screen is installed on the aggregating port 22. A material port is further provided at the lower end of the aggregator 21. After the fragments pass through the second screen, they fall into the aggregator 21 for collection and then are discharged through the material port.

[0028] The second screen is a plurality of arc-shaped retaining bars 23 evenly distributed at the aggregating port 22. The distance between every two adjacent arc-shaped retaining bars 23 is 2 - 12 mm, and the diameter of the arc-shaped retaining bar 23 is 2 - 20 mm.

[0029] The second broken material conveying device includes a rotary feeder 14 connected to the material port. The lower end of the rotary feeder 14 is connected to a negative pressure mixing accelerator 24. The left end of the negative pressure mixing accelerator 24 is connected to a Roots blower 25. The right end of the negative pressure mixing accelerator 24 is connected to a pneumatic conveying pipeline 17 to convey the fragments.

[0030] An opening and closing door 18 is further provided on the upper side of the discharge conveyor 8. A buffer bin 19 is formed between the opening and closing door 18 and the housing 9, which can enable the materials to accumulate in the buffer bin 19. After accumulating to a certain volume, they are conveyed through the discharge conveyor 8, which can save energy.

[0031] A frame 20 is further provided at the lower end of the discharge conveyor 8.

[0032] When the present invention is in use, the incoming material is sent to the conveyor belt of the arc scraper conveyor 1 by the upstream conveyor. The belt feeds forward, and the material enters the scraper 3 part along the arc plate 10. The material is evenly scraped out by the scraper 3 into the discharge hopper 4 and enters the screening assembly. The material of the set specification is screened, and the unqualified material is removed and then enters the first or second shredding and conveying device for recycling. The qualified material enters the discharge conveyor 8 for conveying.

[0033] The beneficial effects of the present invention are as follows: The structure of the present invention is ingenious and novel. By improving the traditional arc scraper conveyor and adding a screening assembly and a reject recycling assembly, when used in cooperation with a threshing machine, the proportion of qualified products can be increased by more than 1%, and good and remarkable economic benefits can be obtained. In addition, by arranging the screening assembly and the reject recycling assembly on the lower side of the arc scraper conveyor, the land area can be saved.

[0034] The above specific embodiments / Examples are specific embodiments of the present invention and are used to illustrate the concept of the present invention. They are all explanatory and exemplary and should not be construed as limiting the embodiments and scope of the present invention. Except for the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and the specification of this application. These technical solutions include technical solutions that make any obvious substitutions and modifications to the embodiments described herein, and they are all within the protection scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text but includes all technical solutions that fall within the scope of the claims.

Claims

1. A scraper screening conveyor, comprising an arc scraper conveyor (1), a circular scraper assembly is provided on the arc scraper conveyor (1), the conveying surface at the upper end of the arc scraper conveyor (1) is arc-shaped, the circular scraper assembly includes an arc cover (2) installed at the upper end of the conveyor frame of the scraper (3) and a scraper (3) installed in the arc cover (2), a discharge hopper (4) is connected to the left end of the arc cover (2), and it is characterized in that, A screening component is connected to the lower side of the discharge hopper (4). The screening component includes an arc-shaped chute screening section (5). A broken material outlet (6) and a material outlet (7) are respectively arranged on the left side and the right side of the chute screening section (5). The broken material outlet (6) is connected to a first broken material conveying device or a second broken material conveying device. A discharge conveyor (8) is arranged on the lower side of the material outlet (7); An opening and closing door (18) is further arranged on the upper side of the discharge conveyor (8). A buffer bin (19) is formed between the opening and closing door (18) and the housing (9); The screening component includes a housing (9). The chute screening section (5) is a folding type screening device. The folding type screening device includes an arc-shaped first screen arranged on the housing (9). A straight plate (11) is arranged at the lower end of the first screen. An acute angle is formed between the straight plate (11) and the first screen; The screening component includes a housing (9). The chute screening section (5) is a bin type screening device. The bin type screening device includes an aggregator (21). An aggregate inlet (22) is arranged at the upper end of the aggregator (21). A second screen is installed on the aggregate inlet (22). A material outlet is further arranged at the lower end of the aggregator (21); The first screen includes an arc-shaped plate (10). A plurality of through grooves (12) are uniformly distributed on the arc-shaped plate (10); The second screen is a plurality of arc-shaped retaining rods (23) uniformly distributed at the aggregate inlet (22); The first broken material conveying device includes a broken material bin (13). The upper end of the broken material bin (13) is connected to the lower end of the straight plate (11) extending out of the housing (9). The lower end of the broken material bin (13) is connected to a rotary feeder (14). The lower end of the rotary feeder (14) is connected to a Venturi conveyor (15). The left end of the Venturi conveyor (15) is connected to a compressed air source (16). The right end of the Venturi conveyor (15) is connected to a pneumatic conveying pipeline (17); The second broken material conveying device includes a rotary feeder (14) connected to the material outlet. The lower end of the rotary feeder (14) is connected to a negative pressure mixing accelerator (24). The left end of the negative pressure mixing accelerator (24) is connected to a Roots blower (25). The right end of the negative pressure mixing accelerator (24) is connected to a pneumatic conveying pipeline (17).

2. The scraper screening conveyor according to claim 1, characterized in that, A frame (20) is further arranged at the lower end of the discharge conveyor (8).

3. The scraper screening conveyor according to claim 1, characterized in that, The pressure provided by the compressed air source (16) is greater than or equal to 0.1 MPa.

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