CN211079434U

CN211079434U - Apocynum venetum opener

Info

Publication number: CN211079434U
Application number: CN201921372198.0U
Authority: CN
Inventors: 凌受明; 易争志; 徐徳安; 龚茂春
Original assignee: Zhuzhou And Tianyuan Technology Development Co ltd
Current assignee: Zhuzhou And Tianyuan Technology Development Co ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-07-24
Anticipated expiration: 2029-08-22

Abstract

The utility model discloses a kendir opener, include: the feeding curtain is arranged at the feeding end of the apocynum venetum opener; the feeding roller is rotatably arranged at the rear part of the feeding curtain; the needle plate rollers are rotatably arranged behind the feeding rollers and are sequentially arranged along the feeding direction of the apocynum venetum opener; a group of dust cages are rotatably arranged behind each group of needle plate rollers; a hemp feeding plate is arranged between the dust cage and the adjacent rear needle plate roller, and a hemp feeding roller is rotatably arranged above each hemp feeding plate; the distance between the feeding roller and the needle plate roller which is next to the feeding roller is 1.5-2.6 mm; the distances between the plurality of hemp feeding plates and the needle plate roller which is next to the hemp feeding plates are smaller in sequence along the feeding direction, and the distances are all 2-6 mm; along the feeding direction, the rotating speeds of the multiple groups of needle plate rollers are sequentially increased, and the rotating speeds are all 1000-1300 r/min. The apocynum venetum opener can effectively reduce fiber damage during opening and improve the yield of opened fibers.

Description

Apocynum venetum opener

Technical Field

The utility model relates to a spinning equipment technical field particularly, relates to an apocynum venetum opener.

Background

The apocynum venetum fiber integrates the gloss of silk, the softness of cotton, the stiffness and comfort of hemp and the extensibility of velvet, and is recognized as the king of wild fiber by the textile industry. With the research, the medical health care function of the apocynum venetum is fully determined, the apocynum venetum health care tea can regulate blood pressure and improve the immunity of a human body, has certain curative effects on hypertension, tracheitis, nephritis, cold and cough and can delay senility.

The apocynum venetum fiber is a natural far infrared radiation material, can emit far infrared light waves of 4-16 mu m, can improve the blood metabolism capability of a human body, reduce arteriosclerosis and enhance the function of the human body. The apocynum venetum textile has an antibacterial effect, the inhibition rate of escherichia coli, candida albicans, staphylococcus aureus and the like reaches more than 95%, and the sterilization rate of the textile reaches 76-84% after the textile is washed for 20-30 times. In addition, the apocynum venetum textile can resist ultraviolet rays. Nowadays, apocynum venetum fibers are mostly used as medical care clothing and high-grade textiles. The yield of wild apocynum venetum (apocynum venetum) in Xinjiang today is reduced from eight million acres in the eighties of the last century to over one million acres, so that apocynum venetum fibers are very expensive and are in short supply.

Physical properties of the apocynum venetum fibers are as follows: 7-10% of bast can be stripped from the harvested raw ramie, and about 40% of refined dry ramie is refined by degumming, so that the refined dry ramie (fiber) extracted from the raw material is only 3-4% on average. The fineness of the apocynum venetum fiber is 2000 plus 2700Nm, is slightly thinner than that of ramie, has the length between 20 and 50mm and is close to that of cotton fiber. The strength of single fiber of the apocynum is 7.24CN, and the relative strength is more than 4 times of that of the cotton fiber; elongation at break 3.42%. The apocynum venetum fiber has the advantages of corrosion resistance, moisture resistance, small water shrinkage, large moisture absorption, fast moisture dispersion, excellent ventilation and better antistatic property than cotton. The apocynum venetum fiber also contains 18 amino acids.

In bast fiber of hemp, only apocynum venetum and ramie are single fiber spun, so apocynum venetum must be opened and separated into single fiber state before spinning. The fineness of the apocynum venetum fiber is similar to that of ramie, the average length of the fiber is similar to that of a cotton fiber, the surface of the apocynum venetum fiber is smooth and has no crimp, the orderliness of the length and the fineness are poor (see figure 1), the dynamic friction coefficient 0.5547 of the apocynum venetum fiber is larger than the static friction coefficient 0.4533 of the apocynum venetum fiber, the cohesive force between the apocynum venetum fiber is small, and the smoothness (fiber and metal) and the bundling property (fiber and fiber) of the apocynum venetum fiber cannot meet the basic process requirements of opening and separating into single fibers.

The serious defects in physical properties cause that when apocynum venetum fibers are opened by traditional equipment (a combined opening and picking machine), the fibers are seriously damaged, a plurality of useful fibers are broken, short fibers are scattered in a flying manner, the web formation is difficult, the yield of the opened fibers is low, the average length of the fibers after opening is reduced by more than 5mm compared with that before opening, the short fiber rate below 16mm is up to 20 percent, and a large amount of doubling is up to 13 percent. Such opening causes useless consumption of the apocynum venetum fibers, greatly increases the subsequent carding difficulty and deteriorates the quality and the yield of finished yarns.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a kendir opener to solve the opener among the prior art at least fibre damage when opening the kendir fibre serious, open the technical problem that the fibre yield is low.

In order to realize the above-mentioned purpose, the utility model provides an apocynum venetum opener, this apocynum venetum opener includes: the feeding curtain is arranged at the feeding end of the apocynum venetum opener and is used for placing the fine dried apocynum venetum; the feeding roller is rotatably arranged at the rear part of the feeding curtain and is used for holding and feeding the fine dried apocynum venetum into the apocynum venetum opener; the needle plate rollers are rotatably arranged behind the feeding roller and are sequentially arranged along the feeding direction of the apocynum venetum opener and used for opening and carding the fed apocynum venetum to form apocynum venetum fibers; a group of dust cages are rotatably arranged behind each group of needle plate rollers and are used for condensing the apocynum venetum fibers which are subjected to opening and carding by the front needle plate roller; a hemp feeding plate is arranged between the dust cage and the adjacent rear needle plate roller, a hemp feeding roller is rotatably arranged above each hemp feeding plate, and the hemp feeding plate and the hemp feeding roller are used for holding and feeding the apocynum fibers on the front dust cage onto the rear needle plate roller; the distance between the feeding roller and the needle plate roller which is next to the feeding roller is 1.5-2.6 mm; the distances between a plurality of hemp feeding plates and a needle plate roller which is next to the hemp feeding plates behind the hemp feeding plates are sequentially reduced along the feeding direction of the apocynum venetum opener, and the distances are all 2-6 mm; along the feeding direction of the apocynum venetum opener, the rotating speeds of the plurality of groups of needle plate rollers are sequentially increased, and the rotating speeds are all 1000-plus-one 1300 r/min.

Furthermore, steel needles are arranged on the needle plate rollers, and the needle planting density of a plurality of groups of needle plate rollers is gradually increased along the feeding direction of the apocynum venetum opener.

Furthermore, the axis of the steel needle is collinear with the circle center of the needle plate roller; the maximum outer diameter of the steel needle is 3.2-3.5mm, and the height of the implanted needle is 14-16 mm.

Furthermore, a scraping plate is arranged above each group of needle plate rollers and used for cleaning the steel needles on the needle plate rollers so as to improve the opening efficiency and the opening quality of the steel needles.

Furthermore, a leakage bottom is arranged below each group of needle plate rollers and is arranged in an arc shape along the circumferential direction of the needle plate rollers.

Furthermore, a hemp pressing roller is rotatably arranged above each group of the dust cages and is used for rolling the apocynum venetum fibers on the dust cages into fiber net rolls.

Furthermore, a plurality of riding wheels are arranged below each group of dust cages.

Furthermore, a rubber pressing plate is arranged at the position of each feeding roller and each group of the hemp feeding rollers, and the rubber pressing plates are tightly contacted with the feeding rollers or the hemp feeding rollers.

Furthermore, the feeding roller comprises a feeding upper roller and a feeding lower roller which are matched with each other, the apocynum venetum opener further comprises a speed reducing motor, the speed reducing motor is connected with the feeding lower roller through a chain and chain wheel transmission mechanism, a conjoined gear of the feeding lower roller is meshed with a conjoined gear of the feeding upper roller, and the feeding upper roller is connected with the plurality of feeding rollers through the chain and chain wheel transmission mechanism.

Furthermore, the apocynum venetum opener also comprises an exhaust fan which is communicated with the inner cavity of the dust cage through a ventilation pipeline.

Furthermore, the apocynum venetum opener also comprises a driving motor, and the driving motor drives a plurality of groups of needle plate rollers and a plurality of groups of dust cages to rotate through a transmission mechanism.

By applying the technical scheme of the utility model, a plurality of groups of needle plate rollers are arranged behind the feeding roller, a group of dust cages are arranged behind each group of needle plate rollers, and a hemp feeding plate and a matched hemp feeding roller are arranged between each group of dust cages and the next needle plate roller behind the dust cages; and the distance between the feeding roller and the needle plate roller which is next to the feeding roller is controlled to be 1.5-2.6 mm; along the feeding direction, the distances between a plurality of hemp feeding plates and the needle plate rollers which are next to the hemp feeding plates behind the hemp feeding plates are set to be reduced in sequence, and the control distances are all 2-6 mm; along the feeding direction, the rotating speeds of the needle plate rollers are set to be increased in sequence, and the rotating speeds are controlled to be 1000-1300 r/min. By adopting the structure, the fine and dry apocynum venetum is subjected to multi-group gradual opening and condensation to form a net, and the opening degree is changed from small to large; absorbing dust impurities in the opened fibers while agglomerating to form a net; after the treatment of a plurality of groups of working elements, the effect of fully opening the apocynum venetum into single fibers is achieved, and the fibers are protected from being damaged in the whole opening process to the maximum extent.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of an apocynum venetum opener of the embodiment of the utility model.

Fig. 2 is an enlarged view of fig. 1 after rotating 90 ° clockwise at a.

Fig. 3 is an enlarged view of fig. 1 after rotating 90 ° clockwise at B.

Fig. 4 is an enlarged view of fig. 1, rotated 90 ° clockwise.

Fig. 5 is an enlarged view of fig. 1 after rotating 90 ° clockwise.

Wherein the figures include the following reference numerals:

10. a feeding curtain; 20. a feeding roller; 21. feeding the upper roller; 22. feeding the lower roller; 30. a needle plate roller; 31. a steel needle; 40. a dust cage; 50. feeding a hemp board; 60. a bast feeding roller; 70. scraping the pattern plate; 80. a step of leaking; 90. a hemp pressing roller; 100. a riding wheel; 110. a rubber press plate; 120. a reduction motor; 130. an exhaust fan; 140. a frame; 150. a hemp conveying curtain.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather the intention is merely to facilitate a distinction between corresponding parts. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

The front side of the utility model is opposite to the feeding direction of the opener (see figure 1), and the rear side of the utility model is the same as the feeding direction of the opener.

Referring to fig. 1 to 5, a apocynum venetum opener according to an embodiment of the present invention mainly includes a frame 140, a feeding curtain 10, a feeding roller 20, four sets of faller rollers 30, four sets of dust cages 40, three feeding boards 50, three feeding rollers 60, and a feeding curtain 150, wherein the feeding curtain 10, the feeding roller 20, the faller rollers 30, the dust cages 40, the feeding boards 50, the feeding rollers 60, and the feeding curtain 150 are all installed on the frame 140, the feeding curtain 10 is disposed at a feeding end of the apocynum venetum opener for placing apocynum fine dried fibers, the feeding roller 20 is rotatably installed behind the feeding curtain 10 for holding the apocynum venetum dry fibers in the apocynum venetum opener, a plurality of sets of faller rollers 30 are rotatably installed behind the feeding roller 20 and are sequentially disposed in a feeding direction of the apocynum venetum opener, the carding roller 30 is used for opening apocynum venetum to form apocynum venetum fibers, a plurality of apocynum venetum feeding rollers 30 are rotatably installed behind the feeding cage 40, a plurality of feeding cages 40, a plurality of feeding rollers 30 are sequentially installed in a feeding direction of an apocynum venetum carding roller 352-2, a feeding roller 30 is arranged between adjacent pair of the feeding rollers 30, a feeding roller 30 is arranged in a feeding roller 30, a feeding roller is arranged in a feeding roller 30 feeding roller for feeding roller 30, a feeding roller 2, a feeding roller for feeding roller 30, a feeding roller for feeding roller 2, a condensing roller for feeding a condensing a distance of an apocynum carding roller is arranged in front of an apocynum carding roller, a dust cage for feeding roller is arranged in a condensing roller of an apocynum carding roller, a condensing roller, a dust cage for condensing roller, a distance of a plurality of an adjacent thereto, a dust cage 30, a dust cage is arranged in a plurality of an opening roller is arranged in a.

In the apocynum venetum opener, a plurality of groups of needle plate rollers 30 are arranged behind the feeding roller 20, a group of dust cages 40 are arranged behind each group of needle plate rollers 30, and a hemp feeding plate 50 and a matched hemp feeding roller 60 are arranged between each group of dust cages 40 and the next needle plate roller 30 behind; and the distance between the feeding roller 20 and the needle plate roller 30 which is next to the feeding roller is controlled to be 1.5-2.6 mm; along the feeding direction, the distances between a plurality of hemp feeding plates 50 and the needle plate rollers 30 which are next to the hemp feeding plates are set to be reduced in sequence, and the control distances are all 2-6 mm; along the feeding direction, the rotating speeds of the needle plate rollers 30 are set to be increased in sequence, and the rotating speeds are controlled to be 1000-1300 r/min. By adopting the structure, the fine and dry apocynum venetum is subjected to multi-group gradual opening and condensation to form a net, and the opening degree is changed from small to large; absorbing dust impurities in the opened fibers while agglomerating to form a net; after the treatment of a plurality of groups of working elements, the effect of fully opening the apocynum venetum into single fibers is achieved, and the fibers are protected from being damaged in the whole opening process to the maximum extent.

Referring to fig. 1 to 5, in the present embodiment, a plurality of steel needles 31 are provided on a needle plate roller 30; and, the density of the needle planting of the plurality of groups of needle plate rollers 30 is gradually increased along the feeding direction of the apocynum venetum opener. Specifically, in this embodiment, the needle density of the first to fourth groups of needle plate rollers 30 in the feeding direction is I17, II 19, III 21, IV 23T/inch². So set up, can further improve the effect of opening of apocynum venetum fibre, reduce the fibre damage.

Further, in the present embodiment, the axis of the steel needle 31 is collinear with the center of the needle plate roller 30; the maximum outer diameter of the steel needle 31 is 3.2-3.5mm, and the needle planting height is 14-16 mm.

Referring to fig. 1, in the present embodiment, a scraping plate 70 is installed above each group of needle plate rollers 30, and the scraping plate 70 is used for cleaning the steel needles 31 on the needle plate rollers 30 and preventing the steel needles 31 from returning flowers and blocking flowers, so as to achieve the effect of improving the opening efficiency and the opening quality of the steel needles 31.

Referring to fig. 1, in the present embodiment, one under-screen 80 is installed under each set of needle board rollers 30, and the under-screen 80 is arranged in an arc shape along the circumferential direction of the needle board rollers 30. During the process of opening the apocynum venetum by the rotation of the faller roll 30, dust in the opening fibers and part of useful fibers can fall downwards, and by installing the under screen 80 below the faller roll 30, the dust in the opening fibers can smoothly fall from the under screen 80, while part of the useful fibers are left on the under screen 80 and return to the needle surface of the faller roll 30 during the rotation of the faller roll 30. By arranging the screen 80 in an arc-shaped manner in the circumferential direction of the needle board roller 30, on the one hand, the useful fibers on the screen 80 can be better returned and, on the other hand, the opened fibers can be easily transferred to the next dust cage 40.

Referring to fig. 1, in the present embodiment, a pressure roller 90 is rotatably installed above each group of the dust cages 40, and the pressure roller 90 is used for rolling the opened apocynum venetum fibers condensed on the surfaces of the dust cages 40 into fiber net rolls with a certain density and a certain thickness, so as to increase the cohesion force between the fibers and facilitate the continuous and uniform transfer of the apocynum venetum fibers into net sheets.

Referring to fig. 1, in the present embodiment, a plurality of idlers 100 are installed below each group of the dust cages 40. Each dust cage 40 is supported and positioned by a plurality of supporting rollers 100 at two ends of the dust cage, and the supporting roller shafts are preferably eccentric shafts, so that the dust cage 40 can be conveniently installed and positioned, the dust cage 40 is accurately positioned, and the level and the balance are kept.

Referring to fig. 1 to 5, in the present embodiment, a rubber press plate 110 is provided at the feed roller 20 and each set of the feed rollers 60, and the rubber press plate 110 is in close contact with the feed roller 20 or the feed roller 60. The rubber pressing plate 110 plays a role in sealing, so that air flow is prevented from being discharged from the feeding roller 20 and the linen feeding roller 60, the feeding roller 20 and the linen feeding roller 60 can be effectively prevented from being wound with linen, and the working environment is improved. The feed roller 20 and the feed roller 60 may be spring-loaded or pneumatically-loaded, as shown in FIG. 1, in this embodiment by spring loading.

Referring to fig. 1, in the present embodiment, the feeding roller 20 includes a feeding upper roller 21 and a feeding lower roller 22 which are engaged with each other, the apocynum venetum opener further includes a reduction motor 120, the reduction motor 120 is connected to the feeding lower roller 22 through a chain sprocket transmission mechanism (not shown), a coupling gear (not shown) of the feeding lower roller 22 is engaged with a coupling gear (not shown) of the feeding upper roller 21, and the feeding upper roller 21 is connected to the plurality of feeding rollers 60 through the chain sprocket transmission mechanism. The arrangement is that the feeding upper roller 21 and the feeding lower roller 22 are driven by the speed reducing motor 120 to synchronously grab and hold the apocynum fine dried ramie placed on the feeding curtain 10, and the apocynum fine dried ramie is fed to the next needle plate roller 30 for opening and carding; and drives the feed roller 60 to feed the fibers on the feed plate 50 to the rear needle plate roller 30. The feeding roller 20 and the plurality of feed rollers 60 are driven by one speed reducing motor 120, the structure is simple, and the operation is convenient. The rotational speed of the feed roller 20 and the feed roller 60 can be controlled by controlling the gear ratio of the transmission gear.

In this embodiment, the apocynum venetum opener further comprises a suction fan 130, and the suction fan 130 is communicated with the inner cavity of the dust cage 40 through a ventilation pipeline. Specifically, the number of the suction fans 130 is two, wherein one suction fan 130 is communicated with the inner cavities of the first group and the second group of the dust cages 40 through a ventilation duct, and the second suction fan 130 is communicated with the inner cavities of the third group and the fourth group of the dust cages 40 through a ventilation duct. Therefore, the opened apocynum venetum fibers can be condensed into a net roll on the surface of the dust cage 40, so that the apocynum venetum fibers are convenient to continuously transfer, dust in the apocynum venetum fibers can be absorbed, the fiber quality is improved, and the working environment is improved.

In this embodiment, the apocynum venetum opener further includes a driving motor (not shown in the figure) which drives the plurality of groups of faller rollers 30 and the plurality of groups of dust cages 40 to rotate through a transmission mechanism. Specifically, the driving motor drives the needle plate roller 30 coaxially on the bearing block by a belt pulley and a belt; the needle plate rollers 30 respectively drive the rear group of needle plate rollers 30 and coaxial pinions on the gear seats through chain sprockets, and the pinions are meshed with the inner gear rings of the first group of dust cages 40 to enable the first group of dust cages 40 to rotate slowly; the coaxial other end of the gear seat drives the coaxial pinion on the second group of gear seat and the inner gear ring of the second group of dust cages 40 meshed with the coaxial pinion through the chain wheel and the chain, so that the second group of dust cages 40 rotate slowly; the needle plate rollers 30 and the dust cages 40 of the third and fourth groups are also driven by a drive motor.

The utility model discloses a bluish dogbane opener is the operation of working under totally closed state, is formed by wallboard and various closure plate assembly. Various airflows inside the machine enter the ventilating pipeline through the dust cage 40 and are discharged into the dust removing chamber through the exhaust fan 130, so that the airflows are not disordered and have no negative influence on opening, condensation and output, thereby ensuring the quality of opened fibrilia and the stable working operation. The speed reducing motor 120 and the driving motor are arranged outside the machine, which is beneficial to the full sealing of the machine and the working, maintenance and adjustment of the main machine.

Generally, the utility model discloses a kendir opener shortens greatly than traditional opener (scutcher) process flow, low in cost, and area is very little, and is very slight to kendir fibrous damage. The average length of the fibers after opening is reduced by less than 2mm compared with the average length of the fibers before opening; the opening rate of the short fiber (less than 16 mm) is about 9 percent; doubling is less than 8%; the opening yield is improved by more than 3 percent compared with the traditional opening. Use the utility model discloses an apocynum venetum opener can obviously reduce broken net, broken strip, broken end at the comb in-process of spinning, reduces the flyblow by a wide margin, has reduced intensity of labour, has improved operational environment, has saved apocynum venetum fibre's quantity, has improved production efficiency, has reduced manufacturing cost, establishes solid foundation for improving and stabilizing the resultant yarn quality.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An apocynum venetum opener characterized by comprising:

the feeding curtain (10) is arranged at the feeding end of the apocynum venetum opener and is used for placing the fine dried apocynum venetum;

the feeding roller (20) is rotatably arranged at the rear part of the feeding curtain (10) and is used for holding and feeding the apocynum venetum refined and dried apocynum venetum into the apocynum venetum opener;

the needle plate rollers (30) are rotatably arranged behind the feeding roller (20) and are sequentially arranged along the feeding direction of the apocynum venetum opener, and the needle plate rollers (30) are used for opening and carding the fed apocynum venetum to form apocynum venetum fibers;

a plurality of groups of dust cages (40), wherein a group of dust cages (40) is rotatably arranged behind each group of needle plate rollers (30), and the dust cages (40) are used for condensing apocynum venetum fibers which are subjected to opening and carding by the front needle plate rollers (30);

a hemp feeding plate (50) is arranged between the dust cage (40) and the needle plate roller (30) adjacent to the dust cage and behind the dust cage, a hemp feeding roller (60) is rotatably arranged above each hemp feeding plate (50), and the hemp feeding plates (50) and the hemp feeding rollers (60) are used for holding and feeding apocynum venetum fibers on the dust cage (40) in front onto the needle plate roller (30) behind the dust cage;

the distance between the feeding roller (20) and the needle plate roller (30) which is next to the feeding roller is 1.5-2.6 mm; the distances between a plurality of hemp feeding plates (50) and the needle plate rollers (30) which are close to the rear parts of the hemp feeding plates are sequentially reduced along the feeding direction of the apocynum venetum opener, and the distances are all 2-6 mm; along the feeding direction of the apocynum venetum opener, the rotating speeds of the plurality of groups of needle plate rollers (30) are sequentially increased, and the rotating speeds are all 1000-plus-1300 r/min.

2. The apocynum venetum opener according to claim 1, characterized in that steel needles (31) are provided on the faller rollers (30), and the density of the planted needles of a plurality of groups of the faller rollers (30) is gradually increased along the feeding direction of the apocynum venetum opener.

3. The apocynum venetum opener according to claim 2, characterized in that the axis of the steel needle (31) is collinear with the center of the needle plate roller (30); the maximum outer diameter of the steel needle (31) is 3.2-3.5mm, and the needle planting height is 14-16 mm.

4. The apocynum venetum opener according to claim 2, characterized in that a shaving board (70) is installed above each set of the faller rollers (30), and the shaving board (70) is used for cleaning the steel needles (31) on the faller rollers (30) to improve the opening efficiency and the opening quality of the steel needles (31).

5. The apocynum venetum opener according to claim 1, characterized in that a under screen (80) is installed under each set of the needle board rollers (30), and the under screen (80) is arranged in an arc shape along the circumferential direction of the needle board rollers (30).

6. The apocynum venetum opener according to claim 1, characterized in that a pressure roller (90) is rotatably mounted above each group of said cages (40), said pressure roller (90) being adapted to roll apocynum venetum fibers on said cages (40) into a web roll.

7. The apocynum venetum opener according to claim 1, characterized in that a plurality of riding wheels (100) are installed below each group of the dust cages (40).

8. The apocynum venetum opener according to claim 1, characterized in that a rubber press plate (110) is provided at the feed roller (20) and each set of the feed rollers (60), the rubber press plate (110) being in close contact with the feed roller (20) or the feed rollers (60).

9. The apocynum venetum opener according to claim 1, characterized in that the feeding roller (20) comprises a feeding upper roller (21) and a feeding lower roller (22) which are matched with each other, the apocynum venetum opener further comprises a speed reducing motor (120), the speed reducing motor (120) is connected with the feeding lower roller (22) through a chain and sprocket transmission mechanism, a conjoined gear of the feeding lower roller (22) is in meshed connection with a conjoined gear of the feeding upper roller (21), and the feeding upper roller (21) is connected with a plurality of the feeding rollers (60) through the chain and sprocket transmission mechanism.

10. The apocynum venetum opener according to claim 1, characterized in that it further comprises an exhaust fan (130), said exhaust fan (130) being in communication with the inner cavity of said dust cage (40) through a ventilation duct; the apocynum venetum opener further comprises a driving motor, and the driving motor drives a plurality of groups of the needle plate rollers (30) and a plurality of groups of the dust cages (40) to rotate through a transmission mechanism.