Dry separation device for bamboo fibers and powder

Abstract

According to the dry-method separation device for the bamboo fibers and the powder, the separation mechanism is rotatably arranged in the barrel cover of the separation module, and the first separation part is used for supporting and stirring a mixed material, so that the standing time of the mixed material is prolonged, and the fibers and the powder in the mixed material are fully scattered; a negative pressure mechanism is matched for exhausting air at the top so that light powder can be output upwards in a concentrated mode, the second separation part separates fibers under the rotating centrifugal effect on the outer ring of the barrel cover so that the fibers can fall down rapidly in a concentrated mode, and therefore rapid separation and partitioned output of the fibers and the powder are achieved, mutual mixing is prevented, and the separation effect is improved; the technical problems existing in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of bamboo processing technology, and in particular to a dry separation device for bamboo fiber and powder. Background Technology

[0002] Bamboo is abundant in my country and has advantages such as a short renewable cycle, low price, high specific modulus and specific strength, and biodegradability, making it a relatively ideal renewable resource. During processing, bamboo yields bamboo fiber and bamboo powder, which can be further processed into refined bamboo products. It is necessary to separate these two materials. Traditional wet separation methods are cumbersome and energy-intensive.

[0003] Chinese patent CN201120032980.5 discloses a bamboo fiber airflow separation device, including a feeding roller, an opening roller, a stripping roller, a blower conveying pipe, an axial flow conveying fan, a volute conveying pipe, a conical cylinder, a volute, a core tube, an auger, an auger motor, a coarse fiber collection hopper, a dust cage conveying pipe, an arc-shaped air cutter, a dust cage with evenly distributed mesh, a suction pipe, a suction fan, a dust bag, a fine fiber vertical pipe, and a fiber collection box. The conical cylinder and auger are connected sequentially below the volute. The core tube located at the center of the volute is connected at its lower end to the conical cylinder and at its upper end to the dust cage conveying pipe. The suction pipe leading out from inside the dust cage is connected to the suction fan. The arc-shaped air cutter is tightly attached to the bottom of the dust cage, and the fine fiber vertical pipe is located to the side of the air cutter. Using this bamboo fiber airflow separation device can shorten the mechanical combing process, reduce energy consumption, and improve fiber yield.

[0004] However, in the existing technical solutions, bamboo fiber and powder are separated solely by airflow within a hollow cylinder. This requires high airflow control, is difficult to operate in practice, and results in the fiber and powder mixing together, leading to poor separation. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a dry separation device for bamboo fiber and powder. The separation module utilizes a rotating separation mechanism within a cylindrical enclosure. The first separation section supports and agitates the mixture, increasing its residence time and thoroughly dispersing the fibers and powders. A negative pressure mechanism at the top draws air to concentrate and upwardly output the lighter powders. The second separation section separates the fibers, which, under centrifugal force, around the outer ring of the enclosure for rapid and concentrated descent. This achieves rapid separation and zoned output of fibers and powders, preventing mixing and improving the separation effect, thus solving the technical problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A dry separation device for bamboo fiber and powder includes: a feeding mechanism; a separation module, wherein the feeding mechanism is connected to the top of the separation module to convey the mixture to be separated to the separation module; and a negative pressure mechanism, wherein the negative pressure mechanism is connected to the top of the separation module to ventilate the interior of the separation module; the separation module is vertically arranged and includes: a cylindrical cover, wherein the cylindrical cover is hollow; and a separation mechanism, wherein the separation mechanism is rotatably installed inside the cylindrical cover.

[0008] Preferably, the separation mechanism includes: a rotating shaft; and a first separation section, wherein a plurality of the first separation sections are arranged on the rotating shaft to agitate and support the mixture.

[0009] Preferably, the separation mechanism further includes: a second separation section, a plurality of second separation sections are arranged around the outer ring of the rotating shaft, and an annular fiber conveying channel is formed between the second separation section and the cylinder cover, wherein the fibers in the mixture are blocked in the fiber conveying channel by the second separation section and output downward.

[0010] Preferably, mounting plates are provided at both the upper and lower ends of the rotating shaft, and the two ends of the second separation part are respectively mounted on the mounting plates.

[0011] Preferably, an annular powder conveying channel is formed between the rotating shaft and the second separating part, and the powder in the mixture is output upward in the powder conveying channel under negative pressure.

[0012] Preferably, two adjacent second separation sections are spaced apart to allow airflow and powder to pass through; the first separation section extends from the gap between the second separation sections and its length is adapted to the inner diameter of the shroud.

[0013] Preferably, the first separation section is configured as a strip-shaped structure extending radially along the rotating shaft, with the side facing the top of the shroud being a tapered arc surface, so that a relative negative pressure difference is formed inside the shroud when the separation mechanism rotates.

[0014] Preferably, the shroud is configured as a tapered structure that is smaller at the top and larger at the bottom.

[0015] Preferably, the separation module further includes a drive mechanism, which is mounted on the shroud and connected to the separation mechanism, and drives the separation mechanism to rotate.

[0016] Preferably, the system further includes a discharge mechanism, which is in sealed communication with the bottom of the separation module to output the separated fibers.

[0017] Preferably, the discharge mechanism is configured as a auger structure.

[0018] Preferably, the negative pressure mechanism includes: an induced draft fan; and an outlet conveying pipe, one end of which is connected to the shroud and the other end of which is connected to the induced draft fan.

[0019] Preferably, the feeding mechanism includes an inlet conveying pipe, which is connected to the shroud.

[0020] The beneficial effects of this utility model are as follows:

[0021] (1) This utility model sets up a separation mechanism inside the cylinder of the separation module. The first separation part supports and stirs the mixture, increases the residence time of the mixture, and fully disperses the fibers and powders in the mixture. The negative pressure mechanism draws air at the top to concentrate the lightweight powders and output them upward. The second separation part separates the fibers under the centrifugal action of rotation on the outer ring of the cylinder so that they fall quickly and in a concentrated manner. This achieves rapid separation and zoned output of fibers and powders, prevents them from mixing, and improves the separation effect.

[0022] (2) By setting a narrow arc surface on the first separation part, according to the principle of fluid mechanics, the air pressure in the upper part of the cylinder is lower than that in the lower part when the separation mechanism rotates, thereby forming a relative negative pressure difference between the upper and lower parts, which promotes the powder to be adsorbed upward, improves the powder output efficiency, and saves energy.

[0023] (3) By setting the cylinder cover to a shape that is smaller at the top and larger at the bottom, the bamboo fiber is less likely to clog and the material is discharged quickly. In addition, because the space below the cylinder cover is larger, the gas flow rate below the cylinder cover is slow when the negative pressure mechanism is venting, which helps the bamboo fiber to sink and improves the separation efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the separation mechanism in this utility model;

[0026] Figure 3 This is a partially enlarged view of the separation mechanism in this utility model. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] Example 1

[0030] like Figure 1 As shown, a dry separation device for bamboo fiber and powder includes: a feeding mechanism 1; a separation module 2, wherein the feeding mechanism 1 is connected to the top of the separation module 2 to feed the mixture to be separated into the separation module 2; and a negative pressure mechanism 3, wherein the negative pressure mechanism 3 is connected to the top of the separation module 2 to ventilate the interior of the separation module 2; the separation module 2 is vertically arranged and includes: a cylindrical cover 4, wherein the cylindrical cover 4 is hollow; and a separation mechanism 5, wherein the separation mechanism 5 is rotatably installed inside the cylindrical cover 4.

[0031] As a preferred option, such as Figure 2 As shown, the separation mechanism 5 includes: a rotating shaft 51; and a first separation part 52, wherein a plurality of first separation parts 52 are distributed on the rotating shaft 51 to agitate and support the mixture.

[0032] In this embodiment, a separation mechanism 5 is rotatably installed inside the casing 4 of the separation module. A first separation part 52 is distributed on the rotating shaft 51 of the separation mechanism 5. The first separation part 52 supports and agitates the mixture, thereby increasing the residence time of the mixture and fully dispersing the powder adhering to the fiber, thus improving the separation efficiency. In conjunction with the negative pressure mechanism 3, air is drawn from the top to concentrate the lightweight powder and output it upward.

[0033] Preferably, the separation mechanism 5 further includes a second separation section 53, a plurality of second separation sections 53 being arranged around the outer ring of the rotating shaft 51, and an annular fiber conveying channel being formed between the second separation sections 53 and the cylindrical cover 4, wherein the fibers in the mixture are blocked by the second separation sections 53 within the fiber conveying channel and output downward.

[0034] Preferably, an annular powder conveying channel is formed between the rotating shaft 51 and the second separating part 53, and the powder in the mixture is output upward in the powder conveying channel under negative pressure.

[0035] In this embodiment, when the separation mechanism 5 rotates, the heavy bamboo fibers are thrown to the outer ring of the cylinder under centrifugal force. The second separation part 53 then blocks the fibers under the centrifugal force in the fiber conveying channel of the outer ring of the cylinder and concentrates them to fall quickly. Meanwhile, the light powder is smoothly output upward from the middle powder conveying channel under negative pressure. This achieves rapid separation and zoned output of fibers and powder, preventing them from mixing. The separation efficiency is high and the separation effect is good.

[0036] Preferably, mounting plates 54 are provided at both the upper and lower ends of the rotating shaft 51, and the two ends of the second separation part 53 are respectively mounted on the mounting plates 54.

[0037] As a preferred option, such as Figure 3 As shown, two adjacent second separation sections 53 are spaced apart to allow airflow and powder to pass through; the first separation section 52 extends from the gap between the second separation sections 53 and its length is adapted to the inner diameter of the cylindrical cover 4 to ensure support and agitation effects.

[0038] As a preferred option, such as Figure 1 As shown, the separation module 2 further includes a drive mechanism 6, which is mounted on the cylindrical cover 4 and connected to the separation mechanism 5, and drives the separation mechanism 5 to rotate.

[0039] Preferably, the system further includes a discharge mechanism 7, which is in sealed communication with the bottom of the separation module 2 to output the separated fibers.

[0040] Preferably, the discharge mechanism 7 is configured as a auger structure.

[0041] Preferably, the negative pressure mechanism 3 includes: a blower 31; and an outlet conveying pipe 32, one end of which is connected to the shroud 4 and the other end is connected to the blower 31.

[0042] Preferably, the feeding mechanism 1 includes an inlet conveying pipe 11, which is connected to the cylinder cover 4.

[0043] Example 2

[0044] The components in this embodiment that are the same as or corresponding to those in the above embodiments are referred to by the same reference numerals as those in the above embodiments. For the sake of simplicity, only the differences between this embodiment and the above embodiments are described below. The difference between this embodiment and the above embodiments is that:

[0045] As a preferred option, such as Figure 3 As shown, the first separation part 52 is configured as a strip-shaped structure extending radially along the rotating shaft 51, and its side facing the top of the cylindrical cover 4 is configured as a narrower arc surface 50, so that when the separation mechanism 5 rotates, a relative negative pressure difference is formed inside the cylindrical cover 4.

[0046] In this embodiment, by providing a narrower arc surface 50 on the first separation section 52, according to the principle of fluid mechanics, the air pressure in the upper part of the cylinder 4 is lower than the air pressure in the lower part when the separation mechanism 5 rotates, thereby forming a relative negative pressure difference between the upper and lower parts, which causes the powder to be adsorbed upward, improving the powder output efficiency while saving energy.

[0047] Example 3

[0048] As a preferred option, such as Figure 1 As shown, the cylindrical cover 4 is configured as a conical structure with a smaller top and a larger bottom.

[0049] In this embodiment, by setting the cylinder cover 4 to a shape that is smaller at the top and larger at the bottom, the bamboo fiber is less likely to clog when it falls, and the discharge is faster. In addition, because the space below the cylinder cover 4 is larger, the gas flow rate below the cylinder cover 4 is slow when the negative pressure mechanism 3 is venting, which helps the bamboo fiber to sink and improves the separation efficiency.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for dry separation of bamboo fibers from powder, characterized in that, include: Feeding mechanism (1); Separation module (2), wherein the feeding mechanism (1) is connected to the top of the separation module (2) to feed the mixture to be separated into the separation module (2); and A negative pressure mechanism (3) is connected to the top of the separation module (2) to ventilate the interior of the separation module (2); The separation module (2) includes: A cylindrical cover (4) is hollow; as well as Separation mechanism (5), which is rotatably installed inside the casing (4).

2. The bamboo fiber and powder dry separation device according to claim 1, characterized in that, The separation mechanism (5) includes: Shaft (51); and First separation section (52), a plurality of first separation sections (52) are distributed on the rotating shaft (51) to agitate and support the mixture.

3. The bamboo fiber and powder dry separation device according to claim 2, characterized in that, The separation mechanism (5) further includes: The second separation section (53) is arranged around the outer ring of the rotating shaft (51). A fiber conveying channel is formed between the second separation section (53) and the cylinder cover (4). The fibers in the mixture are blocked in the fiber conveying channel by the second separation section (53) and output downward.

4. The bamboo fiber and powder dry separation device according to claim 3, characterized in that, An annular powder conveying channel is formed between the rotating shaft (51) and the second separation section (53), and the powder in the mixture is output upward in the powder conveying channel under negative pressure.

5. The bamboo fiber and powder dry separation device according to claim 3, characterized in that, The two adjacent second separation sections (53) are spaced apart to allow airflow and powder to pass through; the first separation section (52) extends from the gap between the second separation sections (53) and its length is adapted to the inner diameter of the shroud (4).

6. The bamboo fiber and powder dry separation device according to any one of claims 2-5, characterized in that, The first separation part (52) is configured as a strip-shaped structure extending radially along the rotating shaft (51), and the side facing the top of the cylinder cover (4) is configured as a narrower arc surface (50) so that a relative negative pressure difference is formed inside the cylinder cover (4) when the separation mechanism (5) rotates.

7. The dry separation device for bamboo fiber and powder according to any one of claims 2-5, characterized in that, The cylindrical cover (4) is configured as a conical structure with a smaller top and a larger bottom.

8. The bamboo fiber and powder dry separation device according to any one of claims 1-5, characterized in that, The separation module (2) further includes: A drive mechanism (6) is mounted on the cover (4) and connected to the separation mechanism (5), which drives the separation mechanism (5) to rotate.

9. The bamboo fiber and powder dry separation device according to any one of claims 1-5, characterized in that, Also includes: The discharge mechanism (7) is connected to the bottom of the separation module (2) to output the separated fibers.

10. The bamboo fiber and powder dry separation device according to any one of claims 1-5, characterized in that, The negative pressure mechanism (3) includes: Exhaust fan (31); and The outlet conveying pipe (32) is connected at one end to the shroud (4) and at the other end to the induced draft fan (31).

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