A device for extracting hemp fibers from hemp stalks

Abstract

The utility model relates to a device for extracting hemp fibers from hemp rods. It sequentially comprises a bale opening, loosening and impurity removing part, an impurity removing and feeding part and a cleaning part. The cleaning part contains at least two cleaning machines, and between the outlet of the impurity removing and feeding part and the inlet of the first cleaning machine and between the outlet of the first cleaning machine and the inlet of the second cleaning machine, there are eighth conveyors. Its features are that: under the outlet of the bale opening, loosening and impurity removing part, there is a fifth conveyor which can run alternately in two directions and is perpendicular to the running direction, and the conveying belt of the fifth conveyor is a steel wire mesh conveying belt. The impurity removing and feeding part and the cleaning part each have two, and the front ends of the two impurity removing and feeding parts are respectively located under the two ends of the fifth conveyor. By using this device, the production efficiency can be greatly improved. It is suitable for extracting hemp fibers from baled hemp rods.

Description

Technical Field

[0001] This utility model relates to a hemp fiber production equipment. Specifically, it is a hemp fiber extraction machine for extracting hemp fibers from bundles of hemp stalks. Background Technology

[0002] In the hemp fiber production industry, it is well known that extracting textile-grade hemp fibers from bundles of hemp stalks requires a coarse treatment process: opening, loosening, and removing impurities using an integrated unpacking, loosening, and impurity removal machine. Then, a fine treatment process, consisting of multiple cleaning and carding machines, is used to further refine the coarsely treated hemp fibers, resulting in textile-grade fibers. The integrated unpacking, loosening, and impurity removal machine and the cleaning and carding machine are integrated and operate simultaneously. The integrated unpacking, loosening, and impurity removal machine has a larger capacity, reaching approximately 800 kg per hour. However, the cleaning and carding machine only produces about 200 kg per hour. Because the former's capacity is far greater than the latter's, it must operate intermittently while waiting for the latter, resulting in low production efficiency. Utility Model Content

[0003] The problem this invention aims to solve is to provide a device for extracting hemp fibers from hemp stalks. Using this device can greatly improve production efficiency.

[0004] The problem to be solved by this utility model is achieved through the following technical solution: This utility model discloses a device for extracting hemp fibers from hemp stalks, comprising, in sequence, an opening and loosening impurity removal section, an impurity removal feeding section, and a cleaning section. The cleaning section contains at least two cleaning machines, and an eighth conveyor is located between the outlet of the impurity removal feeding section and the inlet of the first cleaning machine, and between the outlet of the first cleaning machine and the inlet of the next cleaning machine. Its distinguishing feature is that a fifth conveyor, capable of bidirectional alternating operation and perpendicular to its direction of operation, is located below the outlet of the opening and loosening impurity removal section; the conveyor belt of this fifth conveyor is a wire mesh conveyor belt. There are two impurity removal feeding sections and two cleaning sections, with the front ends of the two impurity removal feeding sections located below the two ends of the fifth conveyor.

[0005] A further improvement of this utility model is that there is a sixth conveyor below the fifth conveyor, and the conveyor belt of the sixth conveyor is a belt conveyor belt, the length and width of which are adapted to the fifth conveyor.

[0006] A further improvement of this utility model is that the unpacking, loosening, and impurity removal section includes a first housing, which is a cuboid arranged horizontally, with inlet and outlet ports at its front and rear ends, respectively. Inside the first housing is a conveyor, a vibrating conveyor with a wire mesh conveyor belt. Above the conveyor is a main roller, which is perpendicular to the longitudinal direction of the first housing. Both ends of the main roller's shaft are rotatably connected to the side wall of the first housing. Above the main roller on both sides are inner front auxiliary rollers and inner rear auxiliary rollers, respectively. Radial steel nails are evenly distributed on the rolling surfaces of the main roller, inner front auxiliary rollers, and inner rear auxiliary rollers, and the radial steel nails on the main roller and the inner front and inner rear auxiliary rollers are arranged in an alternating pattern.

[0007] A further improvement of this utility model is that the conveyor includes a second conveyor and a third conveyor, with the second conveyor being higher than the third conveyor. Both are vibrating conveyors, and their adjacent ends are fitted together with a gap. The main roller is located above and behind the second conveyor.

[0008] A further improvement of this utility model is that the outer sides of the inner front auxiliary roller and the inner rear auxiliary roller are respectively provided with outer front auxiliary roller and outer rear auxiliary roller, and radial steel nails are evenly distributed on the outer front auxiliary roller and the outer rear auxiliary roller. The steel nails on the outer front auxiliary roller and the inner front auxiliary roller, and the radial steel nails on the outer rear auxiliary roller and the inner rear auxiliary roller are arranged in an alternating manner.

[0009] A further improvement of this utility model is that the outer sides of the outer front auxiliary roller and the outer sides of the outer rear auxiliary roller are respectively provided with a front baffle and a rear baffle, and the upper edges of the front baffle and the rear baffle are both connected to the top plate of the first chassis.

[0010] A further improvement of this utility model is that a first elevator is located within the first housing following the conveyor. This first elevator includes a first lower roller and a first upper roller. The first upper roller is located above and behind the first lower roller, and a tension roller is located below and adjacent to the first upper roller. The ends of the roller shafts of the first upper roller, tension roller, and first lower roller are all connected to the corresponding side walls of the first housing via bearings. Each of the first upper roller, tension roller, and first lower roller has a sprocket, and a first lifting curtain is fitted between the sprockets on the first lower roller and the first upper roller. The width of the first lifting curtain is adapted to the width of the conveyor, and it is evenly distributed with steel nails inclined in the forward direction. On the upper two sides of the first lifting curtain are a first uniform hemp roller and a first brush hemp roller, respectively. The ends of the roller shafts of the first uniform hemp roller and the first brush hemp roller are all connected to the corresponding side walls of the first housing via bearings, and their rolling surfaces are evenly distributed with radial steel nails.

[0011] A further improvement of this utility model is that a fourth conveyor, a belt conveyor, is located within the first housing below the rear of the conveyor, and a built-in screw conveyor is located below its rear end. The longitudinal direction of the built-in screw conveyor is perpendicular to the longitudinal direction of the fourth conveyor, and it contains a long groove with a semi-circular cross-section. One end of the long groove is connected to the wall of the first housing on the corresponding side, and the other end protrudes beyond the wall of the first housing on the other side. A screw shaft is located within the long groove, and both ends of the screw shaft are connected to the two end walls of the long groove by bearings.

[0012] A further improvement of this utility model is that the impurity removal feeding unit includes a second housing. The front and rear ends of the second housing have fiber inlets and fiber outlets, respectively. The fiber inlets are all located below the corresponding ends of the fifth conveyor. The fiber outlets are all located above the inlets of adjacent cleaning machines, and there is a guide plate between them. The front and rear parts of the second housing each contain a seventh conveyor and a second fiber elevator. The second fiber elevator contains a second lower roller and a second upper roller. The second upper roller is located above and behind the second lower roller. Both ends of the roller shafts of the second upper roller and the second lower roller are connected to the corresponding side walls of the second housing by bearings. Both the second upper roller and the second lower roller have sprockets, and a second lifting curtain is fitted between the sprockets on the second upper roller and the second lower roller. The width of the second lifting curtain is adapted to the width of the seventh conveyor, and it is evenly distributed with steel nails inclined in the forward direction. On the upper sides of the second lifting curtain are a second equalizing hemp roller and a second brushing hemp roller, respectively. Both ends of the roller shafts of the second equalizing hemp roller and the brushing hemp roller are connected to the corresponding side walls of the second housing by bearings, and their rolling surfaces are evenly distributed with radial steel nails. The front end of the seventh conveyor is higher than its rear end, with its front end located below the fiber outlet of the second housing and its rear end located above the lower end of the second fiber elevator.

[0013] A further improvement of this utility model is that a first conveyor for conveying bundles of hemp stalks is provided before the feed inlet of the first chassis. The height of the first conveyor is higher than that of the second conveyor, and their adjacent ends are fitted together in a gap-like manner.

[0014] As can be seen from the above scheme, a fifth conveyor, which operates bidirectionally and alternately and is perpendicular to the direction of its movement, is installed below the outlet of the unpacking, loosening, and impurity removal section. This fifth conveyor uses a wire mesh conveyor belt. There are two impurity removal feeding sections and two cleaning sections, with the front ends of the two impurity removal feeding sections located below the two ends of the fifth conveyor. Thus, by using a fifth conveyor perpendicular to the direction of the unpacking, loosening, and impurity removal section, and controlling its bidirectional alternating operation along its longitudinal direction via a controller, the system intermittently provides hemp fiber to be processed to both the two impurity removal feeding sections and the cleaning section simultaneously. One set of unpacking, loosening, and impurity removal section can provide hemp fiber to be processed to two or more sets of cleaning sections, thereby significantly improving the production efficiency of hemp fiber. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the device for extracting hemp fibers from hemp stalks according to this utility model; Figure 2 yes Figure 1 A schematic diagram of the AA rotating section; Figure 3 yes Figure 1 Enlarged schematic diagram of point I; Figure 4 yes Figure 1 Enlarged schematic diagram of point J; Figure 5 yes Figure 1 A magnified schematic diagram of the bullet cleaning machine. Detailed Implementation

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the device for extracting hemp fibers from hemp stalks according to this invention sequentially includes an unpacking and loosening impurity removal section, an impurity removal feeding section, and a cleaning section. The cleaning section contains six cleaning machines 35. An eighth conveyor 36 is provided between the outlet of the impurity removal feeding section and the inlet of the first cleaning machine 35, and between the outlet of the first cleaning machine 35 and the inlet of the next cleaning machine 35. A fifth conveyor 26, capable of bidirectional alternating operation and perpendicular to its operating direction, is provided below the outlet of the unpacking and loosening impurity removal section. The conveyor belt of the fifth conveyor 26 is a wire mesh conveyor belt. There are two impurity removal feeding sections and two cleaning sections, with the front ends of the two impurity removal feeding sections located below the two ends of the fifth conveyor 26, respectively. The fifth conveyor 26 can alternately provide hemp fibers to be processed to the two impurity removal feeding sections and the cleaning section.

[0017] in: A sixth conveyor 27 is installed below the fifth conveyor 26. The conveyor belt of the sixth conveyor 27 is a belt conveyor, the length and width of which are adapted to those of the fifth conveyor 26. Impurities falling onto the fifth conveyor 26 can be transported away through the sixth conveyor 27.

[0018] The unpacking, loosening, and impurity removal section includes a first housing 2, which is a rectangular parallelepiped arranged horizontally, with inlet and outlet ports machined at its front and rear ends, respectively. A vibrating conveyor is installed inside the first housing 2, with a wire mesh conveyor belt and a main roller 6 mounted above it. The main roller 6 is perpendicular to the longitudinal direction of the first housing 2, and both ends of its roller shaft are rotatably connected to the side wall of the first housing 2 via bearings. Inner front auxiliary rollers 5 and inner rear auxiliary rollers 7 are respectively installed above the sides of the main roller 6. Radial steel nails 19 are evenly distributed on the rolling surfaces of the main roller 6, inner front auxiliary rollers 5, and inner rear auxiliary rollers 7, and the radial steel nails 19 on the main roller 6, inner front auxiliary rollers 5, and inner rear auxiliary rollers 7 are arranged in an alternating pattern. The conveyor system includes a second conveyor 20 and a third conveyor 18, with the second conveyor 20 being higher than the third conveyor 18. Both are vibrating conveyors, and their adjacent ends are fitted with a gap. The main roller 6 is located above the rear of the second conveyor 20.

[0019] Outer front auxiliary roller 4 and outer rear auxiliary roller 8 are respectively provided on the outer sides of the inner front auxiliary roller 5 and the inner rear auxiliary roller 7. Radial steel nails 19 are evenly distributed on the outer front auxiliary roller 4 and the outer rear auxiliary roller 8. The steel nails on the outer front auxiliary roller 4 and the inner front auxiliary roller 5, and the radial steel nails 19 on the outer rear auxiliary roller 8 and the inner rear auxiliary roller 7 are arranged in an alternating manner.

[0020] The outer sides of the outer front auxiliary roller 4 and the outer sides of the outer rear auxiliary roller 8 are respectively provided with a front baffle 22 and a rear baffle 23, and the upper edges of the front baffle 22 and the rear baffle 23 are both connected to the top plate of the first chassis 2.

[0021] A first elevator is installed in the first housing 2 following the conveyor. This first elevator includes a first lower roller 14 and a first upper roller 11. The first upper roller 11 is located above and behind the first lower roller 14, and a tension roller 13 is located below the first upper roller 11. The rollers of the first upper roller 11, tension roller 13, and first lower roller 14 are all connected to their respective side walls of the first housing 2 by bearings. Each of the first upper roller 11, tension roller 13, and first lower roller 14 has a sprocket. A first lifting curtain 9 is fitted between the sprockets on the first lower roller 14 and the first upper roller 11. The width of the first lifting curtain 9 is adapted to the width of the conveyor, and it is evenly distributed with steel nails inclined in the forward direction. A first uniform hemp roller 10 and a first brush hemp roller 12 are respectively installed on the upper two sides of the first lifting curtain 9. The rollers of the first uniform hemp roller 10 and the first brush hemp roller 12 are also connected to their respective side walls of the first housing 2 by bearings, and their rolling surfaces are evenly distributed with radial steel nails 19.

[0022] A fourth conveyor 16 is installed inside the first housing 2 below the rear of the conveyor. This fourth conveyor 16 is a belt conveyor, and a built-in screw conveyor 15 is located below its rear end. The longitudinal direction of the built-in screw conveyor 15 is perpendicular to the longitudinal direction of the fourth conveyor 16. It contains a long groove 25 with a semi-circular cross-section. One end of the long groove 25 is connected to the wall of the first housing 2 on the corresponding side, and the other end protrudes outside the wall of the first housing 2 on the other side. A screw shaft 24 is installed inside the long groove 25, and both ends of the screw shaft 24 are connected to the two end walls of the long groove 25 by bearings.

[0023] Each of the impurity removal feeding units includes a second housing 28, with fiber inlets and fiber outlets machined at its front and rear ends, respectively. The fiber inlets are all located below the corresponding ends of the fifth conveyor 26. The fiber outlets are all located above the inlets of the adjacent cleaning machine 35, with guide plates 30 positioned between them. A seventh conveyor 31 and a second fiber elevator are respectively installed at the front and rear of the second housing 28. The second fiber elevator includes a second lower roller 33 and a second upper roller 34. The second upper roller 34 is located above and behind the second lower roller 33. Both ends of the roller shafts of the second upper roller 34 and the lower roller 33 are connected to the corresponding side walls of the second housing 28 via bearings. Sprockets are mounted on both the second upper roller 34 and the lower roller 33, and a second lifting curtain 32 is fitted between the sprockets on the second upper roller 34 and the lower roller 33. The width of the second lifting curtain 32 is adapted to the width of the seventh conveyor 31, and it is evenly distributed with steel nails inclined in the forward direction. The upper sides of the second lifting curtain 32 are respectively provided with a second equalizing roller 37 and a second brushing roller 29. The two ends of the roller shafts of the second equalizing roller 37 and the brushing roller 29 are connected to the corresponding side walls of the second housing 28 by means of bearings. Radial steel nails 19 are evenly distributed on their rolling surfaces. The front end of the seventh conveyor 31 is lower than its rear end. Its front end is located below the fiber inlet of the second housing 28, and its rear end is located above the lower end of the second fiber elevator.

[0024] To facilitate the conveying of hemp stalk bundles into the first housing 2, a first conveyor 21 for conveying hemp stalk bundles 1 is provided before the feed inlet of the first housing 2. The height of the first conveyor 21 is higher than that of the second conveyor 20, and their adjacent ends are fitted together in a gap-like manner.

[0025] The cleaning machine 35 includes a third housing 351. The eighth conveyor 36 is located in the upper part of the front inner cavity of the third housing 351, with its front end lower than its rear end. A cleaning roller 353 is located in the middle of the third housing 351. Both ends of the roller shaft of the cleaning roller 353 are connected to the corresponding housing wall of the third housing 351 by bearings. Its outer circumference is evenly distributed with steel nails 343 inclined counterclockwise. A roller assembly 352 is located between its upper left side and the upper end of the eighth conveyor 36, and a negative pressure transfer mesh cylinder 354 is located on its right side. Both ends of the negative pressure transfer mesh cylinder 354's cylinder shaft are connected to the corresponding housing wall by bearings. A bushing is mounted on the negative pressure transfer mesh cylinder 354's cylinder shaft, and the bushing is rotatably fitted with the cylinder shaft. A negative pressure bucket 358 is connected to the bushing. The small end of the negative pressure bucket 358 is connected to the bushing, and its large end faces the outer circumference of the cleaning roller 353. Negative pressure suction pipes 355 are provided at both ends of the bushing. The upper end of the negative pressure suction pipe 355 extends above the third housing 351 and is connected to an external vacuum machine. The lower end of each pipe is connected to the bushing and communicates with the negative pressure bucket 358. There is an upper baffle 356 and a lower baffle 345 between the negative pressure bucket 358 and the negative pressure transfer mesh cylinder 354. The front of the upper baffle 356 is higher than its rear, and there is a gap between its front and the roller assembly 352. Its rear is located above the lower edge of the large end of the negative pressure bucket 358, and there is a gap between the two. There is an arc-shaped grid plate 342 on the outer side of the cleaning roller 353 between the lower baffle 345 and the roller assembly 352, which is adapted to the outer circle of the cleaning roller 353. There is a gap between the arc-shaped grid plate 342 and the outer circle of the cleaning roller 353.

[0026] In this embodiment, the second conveyor 20, the third conveyor 18, the fifth conveyor 26, the seventh conveyor 31, and the eighth conveyor 36 are all vibrating conveyors. Each of the second conveyor 20, the third conveyor 18, the fifth conveyor 26, the seventh conveyor 31, and the eighth conveyor 36 has a triangular-shaped convex roller 17 installed between its upper and lower conveyor belts to drive the conveyor belts to vibrate up and down, causing impurities to fall off.

[0027] This invention also includes a controller. Each of the drive rollers of the first to tenth conveyors is connected to a motor, which is connected to the controller via a wire. For simplicity, the controller and motor are omitted from the accompanying drawings.

[0028] During operation, the first conveyor 21 feeds bundles of hemp stalks 1 into the unpacking, loosening, and impurity removal section through the feed inlet at the front end of the first housing 2. This section unpacks, loosens, and initially removes impurities from the bundles. After initial impurity removal, the hemp fibers exit from the discharge outlet of the unpacking, loosening, and impurity removal section and reach the longitudinal center of the fifth conveyor 26. The controller then controls the fifth conveyor 26 to alternately change its conveying direction to feed the impurity removal machines at both ends. The hemp fibers entering the impurity removal machines fall under the combined action of the seventh conveyor 31, the second lifting curtain 32, and the second brush roller 29, and are evenly distributed onto the eighth conveyor 36 via the guide plate 30. The conveyor belt of the eighth conveyor 36 carries the hemp fibers upwards from a low position into the roller assembly 352. Under the clamping of the roller assembly 352, the hemp fibers are repeatedly combed by the steel nails on the cleaning roller 353. After being combed, the hemp fibers and impurities are separated and enter the space between the arc-shaped grid 342 and the cleaning roller 353 along with the counterclockwise rotation of the cleaning roller 353. Under the action of the arc-shaped grid 342, the impurities in the hemp fibers fall onto the ninth conveyor 341 and are carried to the rear by the moving ninth conveyor 341.

[0029] Subsequently, the hemp fibers are thrown by the cleaning roller 353 between the upper baffle 356 and the lower baffle 345, which are opposite to the negative pressure bucket 358. Then, while the negative pressure transfer cylinder 354 rotates clockwise, the hemp fibers are adsorbed onto the outer surface of the negative pressure transfer cylinder 354 under the action of the negative pressure suction pipe 355. At this time, impurities in the hemp fibers are sucked into a separate dust removal system by the negative pressure suction bucket 358 through the negative pressure suction pipe 355 for processing. Afterward, the hemp fibers, along with the rotation of the negative pressure transfer cylinder 354, reach the space between the pressing roller 357 and the negative pressure transfer cylinder 354. Because the rotational linear velocity of the pressing roller 357 is greater than that of the negative pressure transfer cylinder 354, the hemp fibers are released from the adsorption state of the negative pressure transfer cylinder 354, thus completing the fine impurity removal of the hemp fibers and obtaining qualified spinnable hemp fibers.

Claims

1. An apparatus for extracting hemp fibers from hemp stalks, comprising, in sequence, an unpacking and loosening impurity removal section, an impurity removal feeding section, and a cleaning section; wherein the cleaning section contains at least two cleaning machines (35), and an eighth conveyor (36) is provided between the outlet of the impurity removal feeding section and the inlet of the first cleaning machine (35), and between the outlet of the first cleaning machine (35) and the inlet of the next cleaning machine (35); characterized in that: Below the outlet of the unpacking, loosening and impurity removal section is a fifth conveyor (26) that can operate bidirectionally and alternately and is perpendicular to its operating direction. The conveyor belt of the fifth conveyor (26) is a wire mesh conveyor belt. There are two impurity removal feeding sections and two cleaning sections. The front ends of the two impurity removal feeding sections are located below the two ends of the fifth conveyor (26).

2. The apparatus for extracting hemp fibers from hemp stalks according to claim 1, characterized in that: Below the fifth conveyor (26) is a sixth conveyor (27), whose conveyor belt is a belt conveyor belt, the length and width of which are adapted to the fifth conveyor (26).

3. The apparatus for extracting hemp fibers from hemp stalks according to claim 1, characterized in that: The unpacking, loosening, and impurity removal section includes a first housing (2), which is a cuboid arranged horizontally with inlet and outlet ports at the front and rear ends, respectively. Inside the first housing (2) is a conveyor, which is a vibrating conveyor with a wire mesh conveyor belt. Above it is a main roller (6), which is perpendicular to the first housing (2) longitudinally. Both ends of the roller shaft are rotatably connected to the side wall of the first housing (2). Above the two sides of the main roller (6) are inner front auxiliary rollers (5) and inner rear auxiliary rollers (7), respectively. Radial steel nails (19) are evenly distributed on the rolling surfaces of the main roller (6), inner front auxiliary rollers (5), and inner rear auxiliary rollers (7). The radial steel nails (19) on the main roller (6) and the inner front auxiliary rollers (5) and inner rear auxiliary rollers (7) are arranged in an alternating manner.

4. The apparatus for extracting hemp fibers from hemp stalks according to claim 3, characterized in that: The conveyor includes a second conveyor (20) and a third conveyor (18). The second conveyor (20) is higher than the third conveyor (18). They are both vibrating conveyors and are fitted together with gaps at their adjacent ends. The main roller (6) is located above the rear of the second conveyor (20).

5. The apparatus for extracting hemp fibers from hemp stalks according to claim 3, characterized in that: The outer sides of the inner front auxiliary roller (5) and the inner rear auxiliary roller (7) are respectively provided with outer front auxiliary roller (4) and outer rear auxiliary roller (8). Radial steel nails (19) are evenly distributed on the outer front auxiliary roller (4) and the outer rear auxiliary roller (8). The steel nails on the outer front auxiliary roller (4) and the inner front auxiliary roller (5), and the radial steel nails (19) on the outer rear auxiliary roller (8) and the inner rear auxiliary roller (7) are arranged in an alternating manner.

6. The apparatus for extracting hemp fibers from hemp stalks according to claim 5, characterized in that: The outer side of the outer front auxiliary roller (4) and the outer side of the outer rear auxiliary roller (8) are respectively provided with a front baffle (22) and a rear baffle (23), the upper sides of which are connected to the top plate of the first chassis (2).

7. The apparatus for extracting hemp fibers from hemp stalks according to claim 3, characterized in that: The first housing (2) following the conveyor contains a first elevator, which includes a first lower roller (14) and a first upper roller (11). The first upper roller (11) is located above and behind the first lower roller (14), and a tension roller (13) is located below the first upper roller (11). The rollers of the first upper roller (11), tension roller (13), and first lower roller (14) are all connected to the corresponding side walls of the first housing (2) by means of bearings. The first upper roller (11), tension roller (13), and first lower roller (14) are all equipped with chains. A first lifting curtain (9) is fitted between the sprockets on the first lower roller (14) and the first upper roller (11); the width of the first lifting curtain (9) is adapted to the width of the conveyor, and steel nails inclined in the forward direction are evenly distributed on it; the upper sides of the first lifting curtain (9) are respectively equipped with a first uniform hemp roller (10) and a first brush hemp roller (12), and the two ends of the roller shafts of the first uniform hemp roller (10) and the first brush hemp roller (12) are connected to the corresponding side walls of the first housing (2) by means of bearings, and radial steel nails (19) are evenly distributed on their rolling surfaces.

8. The apparatus for extracting hemp fibers from hemp stalks according to claim 3, characterized in that: The first housing (2) below the rear of the conveyor contains a fourth conveyor (16), which is a belt conveyor with a built-in screw conveyor (15) below its rear end. The longitudinal direction of the built-in screw conveyor (15) is perpendicular to the longitudinal direction of the fourth conveyor (16). It contains a long groove (25) with a semi-circular cross-section. One end of the long groove (25) is connected to the wall of the first housing (2) on the corresponding side, and the other end protrudes outside the wall of the first housing (2) on the other side. The long groove (25) contains a screw shaft (24), and both ends of the screw shaft (24) are connected to the two end walls of the long groove (25) by means of bearings.

9. The apparatus for extracting hemp fibers from hemp stalks according to claim 1, characterized in that: The impurity removal feeding section contains a second housing (28), which has a fiber inlet and a fiber outlet at its front and rear ends, respectively. The fiber inlets are located below the corresponding ends of the fifth conveyor (26). The fiber outlets are located above the inlets of the adjacent cleaning machine (35), and there is a guide plate (30) between them. The front and rear parts of the second housing (28) contain a seventh conveyor (31) and a second fiber elevator, respectively. The second fiber elevator contains a second lower roller (33) and a second upper roller (34). The second upper roller (34) is located above and behind the second lower roller (33). The two ends of the rollers of the second upper roller (34) and the second lower roller (33) are connected to the corresponding side walls of the second housing (28) by means of bearings. There are chains on the second upper roller (34) and the second lower roller (33). A second lifting curtain (32) is fitted between the sprockets on the second upper roller (34) and the second lower roller (33); the width of the second lifting curtain (32) is adapted to the width of the seventh conveyor (31), and steel nails inclined in the forward direction are evenly distributed on it; the upper sides of the second lifting curtain (32) are respectively equipped with a second uniform hemp roller (37) and a second brush hemp roller (29), and the two ends of the roller shafts of the second uniform hemp roller (37) and the second brush hemp roller (29) are connected to the corresponding side walls of the second housing (28) by means of bearings, and radial steel nails (19) are evenly distributed on their rolling surfaces; the front end of the seventh conveyor (31) is higher than its rear end, its front end is located below the fiber outlet of the second housing (28), and its rear end is located above the lower end of the second fiber elevator.

10. The apparatus for extracting hemp fibers from hemp stalks according to any one of claims 3 to 8, characterized in that: The first conveyor (21) for conveying hemp stalk bundles (1) is located in front of the feed inlet of the first housing (2). The height of the first conveyor (21) is higher than that of the second conveyor (20), and their adjacent ends are fitted together in a gap-like manner.

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