DEVICE AND METHOD FOR SEPARATING LIGHT FLAKY CUT ROLLED STEMS (CRSs) BY THROWING ROLLER

Abstract

A device for separating light flaky cut rolled stems (CRSs) by a throwing roller is provided. The device includes a vertically provided separation bin, and a CRS guide device and a CRS distribution plate which are arranged in the separation bin. The present disclosure further provides a method for separating light flaky CRSs by using the device. The present disclosure achieves full separation of finished CRSs from light flaky CRSs. The device of the present disclosure is designed for the first time, and can be directly connected to a pneumatic CRS feeding and discharging section of a production line. The device of the present disclosure is compact and suitable for industrial production.

Claims

1. A device for separating light flaky cut rolled stems (CRSs) by a throwing roller, comprising: a vertically provided separation bin, and a CRS guide device and a CRS distribution plate which are arranged in the separation bin; the CRS guide device comprises a guide plate and a throwing roller; the guide plate is in the shape of a triangular prism, with a rectangular surface attached to a surface of the throwing roller and a rectangular surface formed as a guide surface; and the CRS distribution plate is arc-shaped and evenly provided with multiple air vents; and a CRS feed port is provided above the CRS guide device; the guide plate is provided on an upper portion of a side of the throwing roller, such that the guide surface guides CRSs fed through the feed port to the surface of the throwing roller; a suction port is provided above the CRS distribution plate and is connected to an external suction fan; and the CRS distribution plate is provided under a side of the CRS guide device, with a concave arc surface facing the CRS guide device.

2. The device for separating the light flaky CRSs by the throwing roller according to claim 1, wherein the rectangular surface of the guide plate attached to the surface of the throwing roller is formed as an inwardly concave arc surface, and the inwardly concave arc surface is adapted to the surface of the throwing roller; and the guide surface has an upper end provided under the feed port and a lower end provided on the surface of the throwing roller.

3. The device for separating the light flaky CRSs by the throwing roller according to claim 1, wherein the surface of the throwing roller is axially evenly provided with multiple homogenizing baffles; and the homogenizing baffles on the surface of the throwing roller are parallel to each other, and each of the homogenizing baffles is bent at a midpoint, forming a swallow-wing pattern with a tip facing forward on the surface of the throwing roller.

4. The device for separating the light flaky CRSs by the throwing roller according to claim 1, wherein the CRS distribution plate has an open area of 5.0-20.0%.

5. The device for separating the light flaky CRSs by the throwing roller according to claim 1, wherein a bottom portion of the separation bin is provided with a guide plate; a discharge port is provided at a bottom of the guide plate; and the discharge port is also located under the CRS distribution plate.

6. The device for separating the light flaky CRSs by the throwing roller according to claim 2, wherein an angle of the guide surface relative to a horizontal plane is adjustable; the throwing roller rotates in a direction of the tip facing forward; and the throwing roller has an adjustable rotation speed.

7. The device for separating the light flaky CRSs by the throwing roller according to claim 4, wherein an angle of a tangent plane of a convex arc surface of the CRS distribution plate relative to a horizontal plane is adjustable.

8. The device for separating the light flaky CRSs by the throwing roller according to claim 1, wherein the suction fan has an adjustable suction speed.

9. The device for separating the light flaky CRSs by the throwing roller according to claim 1, wherein the separation bin is in the shape of a rectangular parallelepiped.

10. A method for separating light flaky CRSs, using the device according to claim 1 any one of claims 1 to 9, and comprising the following steps: turning on the suction fan, and adjusting the suction speed of the suction fan; allowing CRSs fed through the feed port to slide down the guide surface (112) and rest between the homogenizing baffles of the throwing roller; rotating the throwing roller with the tip facing forward, such that the CRSs between the homogenizing baffles are dispersed axially and are thrown into the concave arc surface of the CRS distribution plate; forming a negative pressure in the separation bin by the suction fan, such that air flows from under the CRS distribution plate through the evenly distributed air vents to the concave arc surface of the CRS distribution plate to form a single layer of discretized CRSs above the concave arc surface of the distribution plate for fluidized separation; and allowing the light flaky CRSs to be sucked into the suction port, and allowing remaining finished CRSs to fall down to the guide plate by gravity and to be discharged from the discharge port; and separating light flaky CRSs at an arbitrary separation ratio to obtain finished CRSs by adjusting the angle of the guide surface relative to the horizontal plane, the rotation speed of the throwing roller, the angle of the tangent plane of the convex arc surface of the CRS distribution plate relative to the horizontal plane, and a suction volume of the suction fan.

11. The method for separating the light flaky CRSs according to claim 10, wherein in the device, the rectangular surface of the guide plate attached to the surface of the throwing roller is formed as an inwardly concave arc surface, and the inwardly concave arc surface is adapted to the surface of the throwing roller; and the guide surface has an upper end provided under the feed port and a lower end provided on the surface of the throwing roller.

12. The method for separating the light flaky CRSs according to claim 10, wherein in the device, the surface of the throwing roller is axially evenly provided with multiple homogenizing baffles; and the homogenizing baffles on the surface of the throwing roller are parallel to each other, and each of the homogenizing baffles is bent at a midpoint, forming a swallow-wing pattern with a tip facing forward on the surface of the throwing roller.

13. The method for separating the light flaky CRSs according to claim 10, wherein in the device, the CRS distribution plate has an open area of 5.0-20.0%.

14. The method for separating the light flaky CRSs according to claim 10, wherein in the device, a bottom portion of the separation bin is provided with a guide plate; a discharge port is provided at a bottom of the guide plate; and the discharge port is also located under the CRS distribution plate.

15. The method for separating the light flaky CRSs according to claim 11, wherein in the device, an angle of the guide surface relative to a horizontal plane is adjustable; the throwing roller rotates in a direction of the tip facing forward; and the throwing roller has an adjustable rotation speed.

16. The method for separating the light flaky CRSs according to claim 13, wherein in the device, an angle of a tangent plane of a convex arc surface of the CRS distribution plate relative to a horizontal plane is adjustable.

17. The method for separating the light flaky CRSs according to claim 10, wherein in the device, the suction fan has an adjustable suction speed.

18. The method for separating the light flaky CRSs according to claim 10, wherein in the device, the separation bin is in the shape of a rectangular parallelepiped.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG. 1 is a schematic diagram of a device for separating light flaky CRSs by a throwing roller according to the present disclosure;

[0030] FIG. 2 is a schematic diagram of a guide plate according to the present disclosure;

[0031] FIG. 3 is a schematic diagram of the guide plate integrated with a throwing roller rotating in a direction indicated by the arrow according to the present disclosure;

[0032] FIG. 4 is a schematic diagram of a distribution plate according to the present disclosure; and

[0033] FIG. 5 shows a photo of light flaky CRSs (right) separated by the device of the present disclosure and finished CRSs (left) obtained according to an embodiment of the present disclosure.

[0034] Reference Numerals: 1. guide device; 11. guide plate; 111. concave arc surface; 112. guide surface; 12. throwing roller; 121. homogenizing baffle; 1211. tip; 2. distribution plate; 21. air vent; 3. guide plate; T. separation bin; T1. feed port; T2. suction port; T22. suction fan; and T3. discharge port.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] In order to make the objectives, technical solutions and beneficial effects of the present disclosure clearer, the implementations of the present disclosure will be further described in detail under with reference to the drawings. The drawings and embodiments are not intended to limit the technical solutions of the present disclosure, and any variations and improvements made based on the teachings of the present disclosure all fall within the protection scope of the present disclosure.

[0036] As shown in FIG. 1, a device for separating light flaky CRSs by a throwing roller includes a vertically provided rectangular parallelepiped-shaped separation bin T, and a CRS guide device 1 and a CRS distribution plate 2 which are arranged in the separation bin T. The CRS guide device 1 includes a guide plate 11 and a throwing roller 12. A surface of the throwing roller 12 is axially evenly provided with multiple homogenizing baffles 121. The CRS distribution plate 2 is arc-shaped, and evenly provided with multiple air vents 21. A CRS feed port T1 is provided above the CRS guide device 1. The guide plate 11 is provided on an upper portion of the throwing roller 12 to guide CRSs fed through the feed port T1 to the surface of the throwing roller 12. A suction port T2 is provided above the CRS distribution plate 2, and is connected to an external suction fan T22. The CRS distribution plate 2 is provided under a side of the CRS guide device 1, with a concave arc surface facing the CRS guide device 1. A bottom portion of the separation bin T is provided with a guide plate 3. A discharge port T3 is provided at a bottom of the guide plate 3, and the discharge port T3 is located directly under the CRS distribution plate 2. The suction fan T22 connected to the suction port T2 has an adjustable suction speed.

[0037] As shown in FIG. 2, the guide plate 11 is in the shape of a triangular prism, with a rectangular concave arc surface 111 and a rectangular guide surface 112. The guide surface 112 has an upper end provided under the feed port T1 and a lower end provided on the surface of the throwing roller 12. The concave arc surface 111 of the guide plate 11 is adapted to the surface of the throwing roller 12. An angle of the guide surface 112 relative to a horizontal plane is adjustable. The throwing roller 12 has an adjustable rotation speed to prevent the CRSs from jamming and accumulating on the surface of the guide plate or the throwing roller. The guide plate 11 is formed by welding two rectangular straight plates and one concave arc plate with unequal areas, and it may be made of stainless steel 307. The concave arc surface 111 is in dynamic and close contact with the homogenizing baffles 121 of the throwing roller 12 to prevent the CRSs from being lifted by negative-pressure air at a bottom portion of the guide plate 11. The guide plate 11 may be pneumatically controlled.

[0038] As shown in FIG. 3, the homogenizing baffles 121 are axially and evenly arranged on the surface of the throwing roller 12. The homogenizing baffles 121 are parallel with each other and each are bent at a midpoint, forming a swallow-wing pattern with a tip 1211 facing forward on the surface of the throwing roller 12. The throwing roller 12 rotates with the tip 1211 facing forward. The throwing roller 12 is composed of a steel shaft body and a stainless steel cylinder body. The homogenizing baffles 121 may be made of silica gel or polyethylene (PE), and may have a height of 2.5-50 mm as required. At this height, the CRSs can be evenly distributed on the surface of the throwing roller, and quickly and evenly thrown to a fluidized separation space above a concave arc surface of the CRSs distribution plate 2, so as to discretize and homogenize the CRSs in a single layer.

[0039] As shown in FIG. 4, an open area of the evenly distributed air vents of the CRS distribution plate 2 is 5.0-20.0%. Thus, the air flows from under the CRS distribution plate to the concave arc surface of the CRS distribution plate through the evenly distributed air vents 21 to form an evenly distributed air pressure. Meanwhile, the air forms a positive pressure on the concave arc surface, such that the CRSs thrown by the throwing roller 12 are in flexible contact with the concave arc surface of the CRS distribution plate 2. The light flaky CRSs are turned over to run upward making the finished CRSs not easily broken. An angle of a tangent plane of a convex arc surface of the CRS distribution plate 2 relative to a horizontal plane is adjustable. The CRS distribution plate 2 may be made of stainless steel 307.

[0040] Multiple access doors may be provided on a wall of the separation bin T to monitor the fluidization and discretization of the CRSs, check a pneumatic conveying device, and perform routine maintenance of components.

[0041] A method for separating light flaky CRSs uses the above-mentioned device and includes the following steps: turn on the suction fan T22, and adjust the suction speed of the suction fan; adjust the angle of the guide surface 111 relative to the horizontal plane to be 60°, and adjust the angle of the tangent plane of the convex arc surface of the CRS distribution plate 2 relative to the horizontal plane to be 60°; set the rotation speed of the throwing roller to 80 rpm, and set an opening of the suction fan T22 to 25%; allow CRSs fed through the feed port T1 to slide down the guide surface 112 by gravity and negative-pressure air and rest between the homogenizing baffles 121 of the throwing roller 12, so as to evenly distribute the CRSs in an axial direction of the throwing roller; rotate the throwing roller 12 with the tip 1211 facing forward, such that the CRSs between the homogenizing baffles 121 are dispersed axially, and are thrown into the concave arc surface of the CRS distribution plate 2; form a negative pressure in the separation bin T by the suction fan T22, such that the air flows from under the CRS distribution plate 2 through the evenly distributed air vents 21 to the concave arc surface of the CRS distribution plate 2, so as to form a fluidized separation space above the concave arc surface of the distribution plate 2 to make a single layer of discretized and homogenized CRSs; and allow light flaky CRSs to be sucked into the suction port T2 by the negative-pressure air, and allow remaining high-density finished CRSs to fall to the guide plate 3 by gravity and to be discharged from the discharge port T3, where the discharge port T3 may be connected to equipment on an original production line. The discharge port of the device is provided under the CRS distribution plate, and is the only air inlet of the closed separation bin. The air entering from the discharge port flows from under the CRS distribution plate 2 through the evenly distributed air vents to the concave arc surface of the CRS distribution plate so as to form an evenly distributed air pressure. This further enables the CRSs thrown by the throwing roller to contact the concave arc surface flexibly, thereby making the CRSs not easily broken.

[0042] The device of the present disclosure was used to separate light flaky CRSs. The separated light flaky CRSs were 177.8 kg/lot, and the finished CRSs were 1543.4 kg/lot. Therefore, the separated light flaky CRSs accounted for 177.8/(177.8+1543.4)=10.33% by weight of the incoming CRSs. The separation effect is indicated by a photo shown in FIG. 5.

[0043] The above described are merely specific implementations of the present disclosure, and the protection scope of the present disclosure is not limited thereto. Any modification or replacement easily conceived by those skilled in the art within the technical scope of the present disclosure should fall within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.