CN216338206U - Divide silk device, spinning equipment and polyacrylonitrile carbon fiber precursor - Google Patents

Abstract

The utility model discloses a yarn dividing device, spinning equipment and polyacrylonitrile carbon fiber precursor, wherein the yarn dividing device comprises a yarn dividing rod and a plurality of yarn dividing grooves which are arranged on the peripheral side wall of the yarn dividing rod at intervals along the axial direction, each yarn dividing groove is arranged in the peripheral direction and comprises a groove opening and a groove bottom, and the width of each yarn dividing groove is reduced from the groove opening to the groove bottom. According to the utility model, the filament separating groove is arranged, so that the polyacrylonitrile carbon fiber precursor is restrained when running in the rinsing groove and the oil feeding groove, the filament bundle interval is kept, the mutual winding of filament bundles is reduced, a large amount of stiff filaments generated in the filament bundle forming stage are prevented, the filament bundles are prevented from being wrapped in the filament bundles, and the continuous running of spinning is ensured; by arranging the filament dividing groove, the filament width can be unfolded to the maximum extent, and the full bobbin rate of the precursor filaments is improved to reach more than 85%; the width of the filament separating groove is reduced from the groove opening to the groove bottom, so that the bundling property of the filament bundles is kept, the water washing and oiling effects of the filament bundles are improved, and the filament bundle monofilament breakage is reduced.

Description

Divide silk device, spinning equipment and polyacrylonitrile carbon fiber precursor

Technical Field

The utility model belongs to the technical field of spinning processes, and particularly relates to a yarn splitting device, spinning equipment and polyacrylonitrile carbon fiber precursor.

Background

The preparation process of the polyacrylonitrile carbon fiber precursor generally comprises the following steps: the preparation and spinning of spinning dope, the formation of coagulating bath, one or more times of water washing and drafting, oiling, drying and winding and yarn winding are generally completed on spinning equipment. And (3) the tows formed by the coagulating bath are sequentially wound on a plurality of spinning rollers and enter a water washing tank, an oiling tank and the like under the guidance of the spinning rollers, so that the steps of water washing drafting, oiling and the like are completed.

In the process of continuous operation of spinning equipment, monofilaments in tows can be wound on spinning rollers in a relatively dispersed manner, so that the monofilaments in the tows between adjacent spinning rollers are distributed in a relatively dispersed manner, and then the monofilaments can be fully contacted with water or oil slurry in a water washing tank or an oil feeding tank, and the uniform water washing or oil feeding effect is realized.

However, because the number of the monofilaments of different varieties of polyacrylonitrile carbon fiber precursors is different, the volume difference of the precursors is large, and the differences of the widths of the precursors are large and the bundling property is poor when the precursors pass through the surface of a spinning roller; and because the overall dimension of the production line is fixed, in the process of producing different varieties of precursor, the number of the tows is fixed because the spindle positions of the tows are fixed, and the widths of the tows of different specifications and varieties are different, so that the tows are doubled, broken and adhered in the washing and oiling sections, the yield of the polyacrylonitrile carbon fiber precursor is further reduced, the quality is reduced, and the full bobbin rate of the obtained precursor is low.

The present invention has been made in view of this situation.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems that in the existing spinning equipment, when different varieties of polyacrylonitrile carbon fiber precursors pass through the surface of a spinning roller, the width difference of the precursors is large, the full bobbin rate is low, the bundling property is poor, and doubling, yarn breaking and adhesion are easily caused, the utility model provides the yarn dividing device, the spinning equipment and the polyacrylonitrile carbon fiber precursors, so that the polyacrylonitrile carbon fiber precursors are restrained when running in a washing tank and an oil feeding tank, the bundling property of tows is favorably kept, the tows are prevented from dispersing in a washing section, the tows and the tows can be spaced in an oil feeding section, the operation is convenient, the fiber width is expanded to the maximum extent, the washing and oiling effects of the tows are improved, and the breakage of monofilaments of the tows is reduced.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a divide silk device, includes and divides the lead screw and a plurality of branch silk grooves that set up along axial interval on the week lateral wall that divides the lead screw, every divides silk groove circumference to set up, divide the silk groove to include notch and tank bottom, divide the width in silk groove to reduce by notch to tank bottom.

Further, the wire dividing groove comprises an inner side wall connecting the groove opening and the groove bottom, and the inner side wall is obliquely arranged from the groove opening to the groove bottom;

preferably, the inner side wall is symmetrically disposed about the groove bottom.

Further, the inner side wall is arranged smoothly;

preferably, the inner side wall is in smooth transition connection with the groove bottom;

preferably, the inner side wall is a smooth arc-shaped side wall;

preferably, the circle center corresponding to the arc-shaped side wall is located above the arc-shaped side wall.

Further, the width of the filament dividing groove is in positive correlation with the number of monofilaments forming the filament bundle;

preferably, the width of the slit of the dividing groove is positively correlated with the number of filaments forming the filament bundle.

Furthermore, the number of the monofilaments forming the filament bundle is 1K-3K, and the width of the notch of the filament dividing groove is 6-12 mm;

and/or the number of the monofilaments forming the filament bundle is 6K-12K, and the width of the notch of the filament dividing groove is 10-18 mm;

and/or the number of the monofilaments forming the filament bundle is 24K-25K, and the width of the notch of the filament dividing groove is 20-30 mm;

and/or the number of the monofilaments forming the filament bundle is 35K-50K, and the width of the notch of the filament dividing groove is 35-50 mm.

The utility model also provides spinning equipment which comprises the yarn separating device in any technical scheme;

preferably, the device further comprises a rinsing bath and/or an oiling bath, the yarn dividing device is at least arranged in the rinsing bath and/or the oiling bath, and the tows correspondingly fall into the yarn dividing baths.

Furthermore, the central axis of the yarn dividing rod is positioned below the plane of the yarn bundle, and the yarn dividing groove is at least partially positioned above the plane of the yarn bundle;

preferably, the groove bottom of the filament dividing groove above the plane of the filament bundle is higher than the plane of the filament bundle;

preferably, the filament separating device is arranged in the rinsing bath, and the bottom of the filament separating bath is 3-5mm higher than the plane of the filament bundle; and/or the filament separating device is arranged in the upper oil groove, and the bottom of the filament separating groove is 8-10mm higher than the plane of the filament bundle;

preferably, the yarn dividing device is arranged in the oil feeding groove, and the edge of a notch of the yarn dividing groove is higher than the liquid level of the oil feeding.

The spinning device further comprises a first spinning roller and a second spinning roller, the first spinning roller guides the tows into a water washing tank and/or an oiling tank, the second spinning roller guides the tows out of the water washing tank and/or the oiling tank, and the splitting rod is arranged between the first spinning roller and the second spinning roller;

preferably, the central axis of the dividing rod is parallel to the central axes of the first spinning roller and the second spinning roller;

preferably, the distance from the dividing screw to the second spinning roller is less than 1/5 of the distance from the first spinning roller to the second spinning roller;

preferably, the distance between the dividing screw rod and the second spinning roller is 50-100 cm;

preferably, the distance from the dividing screw to the second spinning roller is 80-100 cm.

Furthermore, the rinsing bath and/or the oil feeding bath are/is provided with oppositely arranged mounting seats, two ends of the tapping rod are provided with mounting shafts arranged along the central axis direction of the tapping rod, and the mounting shafts are detachably arranged on the mounting seats;

preferably, the mounting seat is provided with a mounting hole, the central axis of the mounting hole is the same as the central axis of the mounting shaft, and the mounting shaft is inserted into the mounting hole and connected with the mounting hole;

preferably, the mounting seat is provided with a fastening hole communicated with the mounting hole, the spinning equipment further comprises a fastening piece, and the fastening piece is inserted into the fastening hole and abutted against the mounting shaft in the mounting hole;

preferably, the fastening hole is a threaded hole, the fastening piece is a bolt, and the bolt is inserted into the threaded hole and is abutted against the mounting shaft;

preferably, the mounting seat includes the arc backup pad and with arc backup pad down, goes up the arc backup pad and can dismantle with arc backup pad down and be connected, it forms with arc backup pad lock down to go up the arc backup pad the mounting hole.

The utility model also provides the polyacrylonitrile carbon fiber precursor, wherein the full bobbin rate of the polyacrylonitrile carbon fiber precursor is more than or equal to 85 percent, and the broken filament rate is 0 to 0.235 percent;

preferably, the broken filament rate of the polyacrylonitrile carbon fiber precursor is 0-0.147%;

preferably, the number of the monofilaments in the tows is 1K-24K, and the full bobbin percentage is 85-95%;

preferably, the full bobbin percentage of the polyacrylonitrile carbon fiber precursor with the monofilament number of 25K-50K in the filament bundle is 96-99%;

preferably, the breaking strength of the polyacrylonitrile carbon fiber precursor is more than or equal to 6.4cN/dtex, and the elongation at break is more than or equal to 13.0%;

preferably, the breaking strength of the polyacrylonitrile carbon fiber precursor is 6.4-6.8cN/dtex, and the elongation at break is 13-14.89%;

preferably, the polyacrylonitrile carbon fiber precursor is produced by adopting the spinning equipment in any one of the technical schemes.

After the technical scheme is adopted, compared with the prior art, the utility model has the following beneficial effects.

According to the utility model, the filament separating groove is arranged, so that the polyacrylonitrile carbon fiber precursor is restrained when running in the rinsing groove and the oil feeding groove, the filament bundle interval is kept, the mutual winding of filament bundles is reduced, a large amount of stiff filaments generated in the filament bundle forming stage are prevented, the filament bundles are prevented from being wrapped in the filament bundles, and the continuous running of spinning is ensured; by arranging the filament dividing groove, the filament width can be unfolded to the maximum extent, and the full bobbin rate of the precursor filaments is improved to reach more than 85%; the width of the filament separating groove is reduced from the groove opening to the groove bottom, so that the bundling property of the filament bundles is kept, the water washing and oiling effects of the filament bundles are improved, and the filament bundle monofilament breakage is reduced.

According to the utility model, the inner side wall of the filament dividing groove is in smooth transition connection with the groove bottom of the filament dividing groove, so that the bundling property of the filament dividing groove on filament bundles is further improved, and broken filaments of the filament bundles are reduced; meanwhile, the stress at the joint of the inner side wall and the bottom of the filament separating groove is prevented from being relatively concentrated, and the strength of the filament bundle is prevented from being influenced.

In the utility model, the width of the filament dividing groove is in positive correlation with the number of monofilaments forming the filament bundle, and the larger the number of the monofilaments forming the filament bundle is, the larger the width of the corresponding filament dividing groove is, so that the filament bundle can fall into the filament dividing groove completely, and the adhesion between the adjacent filament bundles is avoided; meanwhile, the wide difference of different varieties of raw yarns on the surface of the spinning roller is small, the washing and oiling effects are improved, and the bundling property of tows is improved.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model without limiting the utility model to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of the structure of the spinning apparatus of the present invention;

FIG. 2 is a top view of the spinning apparatus of the present invention;

FIG. 3 is a cross-sectional view of a spinning apparatus of the present invention;

FIG. 4 is a schematic view of the mount of the present invention;

FIG. 5 is a schematic view of the structure of the yarn separating device of the present invention;

fig. 6 is a partially enlarged view of a portion a of fig. 5 according to the present invention.

In the figure: 1. tow; 2. a filament separating device; 21. dividing the screw rod; 22. a wire dividing groove; 221. a notch; 222. the bottom of the tank; 223. an inner sidewall; 23. installing a shaft; 3. a rinsing bath; 31. a first spinning roller; 32. a second spinning roller; 4. a mounting seat; 41. mounting holes; 42. a fastener; 43. a fastening hole; 44. an upper arc-shaped support plate; 45. a lower arc-shaped support plate; 46. and (5) fastening the screw.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

as shown in fig. 1 to fig. 6, the utility model discloses a yarn splitting device 2 and a spinning device with the yarn splitting device 2, which are used for producing and preparing polyacrylonitrile carbon fiber precursor. Specifically, the wire dividing device 2 includes a wire dividing rod 21 and a plurality of wire dividing grooves 22 axially spaced on a peripheral side wall of the wire dividing rod 21, and each wire dividing groove 22 is circumferentially arranged. The wire dividing groove 22 comprises a notch 221 and a groove bottom 222, and the width of the wire dividing groove 22 is reduced from the notch 221 to the groove bottom 222.

According to the utility model, the filament dividing groove 22 is arranged, so that the polyacrylonitrile carbon fiber precursor is restricted when the water washing groove 3 and the oil feeding groove operate, the interval between the tows 1 is kept, the mutual winding of the tows 1 is reduced, a large amount of stiff filaments generated in the forming stage of the tows 1 are prevented, the broken filaments are prevented from being wrapped in the tows 1, and the continuous operation of spinning is ensured. By arranging the filament dividing groove 22, the filament width can be unfolded to the maximum extent, and the full bobbin rate of the precursor is improved to reach more than 85%. The width of the filament dividing groove 22 is reduced from the groove opening 221 to the groove bottom 222, so that the bundling property of the filament bundle 1 is kept, the water washing and oiling effects of the filament bundle 1 are improved, and the monofilament breakage of the filament bundle 1 is reduced.

Further, as an embodiment of the present embodiment, the wire dividing groove 22 includes an inner sidewall 223 connecting the notch 221 and the groove bottom 222, and the inner sidewall 223 is disposed obliquely from the notch 221 to the groove bottom 222. The inclination angle of the inner side wall 223 of the filament dividing groove 22 can be adjusted according to the number of single filaments in the filament bundle 1. In the embodiment, the inner side wall 223 is obliquely arranged from the notch 221 to the groove bottom 223, the tows 1 fall into the splitting groove 22 and are gathered together under the action of the inner side wall 223, and the bundling property of the tows 1 is improved.

As another embodiment of this embodiment, the inner sidewall is symmetrically disposed about the slot bottom. In the arrangement mode, the tows 1 falling into the splitting groove 22 are gathered from the two ends of the splitting groove 22 to the central area of the splitting groove 22, and on the basis of improving the bundling property of the tows 1, the cross section of the tows 1 is highly symmetrical, so that the practicability of the tows 1 is improved, and the mechanical property of the tows 1 is improved.

Example 2:

according to the utility model, the inner side wall 223 of the filament separating groove 22 is smoothly arranged, and the filament bundle 1 is in contact with the inner side wall 223 of the filament separating groove 22, so that the phenomena of broken filaments and broken filaments are not easy to generate, and the performance of the filament bundle 1 is improved.

As an embodiment of the present embodiment, the inner side wall 223 of the filament dividing groove 22 is in smooth transition connection with the groove bottom 222 of the filament dividing groove 22, so that the bundling property of the filament bundle 1 by the filament dividing groove 22 is further improved, and broken filaments of the filament bundle 1 are reduced. Meanwhile, the stress at the joint of the inner side wall 223 and the groove bottom 222 of the filament dividing groove 22 is prevented from being relatively concentrated, and the strength of the filament bundle 1 is prevented from being influenced.

Further, the inner side wall 223 of the filament separating groove 22 is a smooth arc-shaped side wall;

furthermore, the corresponding circle center of the arc-shaped side wall is located above the arc-shaped side wall, that is, the arc-shaped side wall is arranged from the inside of the filament dividing groove 22 to the outside of the filament dividing groove 22 in an outward concave manner. This arrangement ensures that the degree of frictional damage to the filament bundle 1 in the dividing groove 22 is minimized.

Example 3:

in the present embodiment, the width of the dividing groove 22 is in a positive correlation with the number of filaments forming the filament bundle 1. Specifically, the larger the number of monofilaments forming the filament bundle 1 is, the larger the width of the corresponding filament dividing groove 22 is, so that the filament bundle 1 can fall into the filament dividing groove 22 completely, and the occurrence of adhesion between the adjacent filament bundles 1 is avoided.

More specifically, the width of the notch 221 of the dividing groove 22 is in positive correlation with the number of monofilaments forming the filament bundle 1.

As an implementation mode of the embodiment, the number of the monofilaments forming the filament bundle is 1K-3K, and the width of the notch 221 of the filament dividing groove 22 is 6-12 mm;

the number of the monofilaments forming the filament bundle is 6K-12K, and the width of the notch 221 of the filament dividing groove 22 is 10-18 mm;

the number of the monofilaments forming the filament bundle is 24K-25K, and the width of the notch 221 of the filament dividing groove 22 is 20-30 mm;

the number of the monofilaments forming the filament bundle is 35K-50K, and the width of the notch 221 of the filament dividing groove 22 is 35-50 mm.

In the embodiment, the more the number of the monofilaments forming the filament bundle 1 is, the larger the width of the corresponding filament dividing groove 22 notch 221 is, so that the widths of the filament dividing grooves 22 notch 221 corresponding to the filament bundles 1 with different filament numbers are different, the difference of the widths of the protofilaments of different varieties on the surface of the spinning roller is smaller, the washing and oiling effects are improved, and the bundling property of the filament bundles 1 is improved.

Example 4:

the utility model also provides spinning equipment, which comprises the yarn separating device 2 in any one of the embodiments, and further comprises a water washing tank 3 and/or an upper oil tank. The filament dividing device 2 is at least arranged in the rinsing bath 3 and/or the upper oiling bath, and the tows 1 correspondingly fall into the plurality of filament dividing baths 22, so that the tows 1 are fully contacted with water or oil slurry, and carbon fiber precursors with performances meeting the standard can be obtained more quickly after the spinning equipment is started.

Further, the central axis of the dividing rod 21 is located below the plane of the filament bundle 1, and the dividing groove 22 is at least partially located above the plane of the filament bundle 1, so that the filament bundle 1 can be in contact with the dividing groove 22 on the dividing rod in the operation process and fall into the dividing groove 22, and mutual winding between different filament bundles 1 is avoided.

Preferably, the groove bottom of the dividing groove 22 above the plane of the tow 1 is arranged higher than the plane of the tow 1. The arrangement mode can enable the tows 1 to fall into the splitting grooves 22 sufficiently to improve the bundling performance of the tows 1. Meanwhile, the phenomenon that part of single precursor in the filament bundle 1 is positioned outside the filament dividing groove 22 and is mutually wound with the single precursor of other filament bundles 1 to cause filament sticking or filament breakage can be avoided.

Further preferably, the filament dividing device 2 is arranged in the rinsing tank 3, and the bottom of the filament dividing tank 22 is 3-5mm higher than the plane of the filament bundle. When the tows 1 move to the splitting rod 21, the tows can smoothly fall into the splitting groove 22, and different tows 1 are isolated from each other under the action of the splitting groove 22.

Or the filament separating device 2 is arranged in the upper oil groove, and the groove bottom of the filament separating groove 22 is 8-10mm higher than the plane of the filament bundle, so that the filament bundles 1 in the upper oil groove can be sufficiently separated, and the filament bundles 1 in the upper oil groove are prevented from being adhered to each other.

Preferably, the filament separating device 2 is arranged in the upper oil groove, and the edge of the notch 221 of the filament separating groove 22 is higher than the upper oil liquid level. In the arrangement mode, the tows 1 in the tow dividing groove 22 cannot fall out of the tow dividing groove 22 under the action of the oil slurry in the upper oil groove, and the mutual adhesion of the adjacent tows 1 under the action of the oil slurry is effectively avoided.

Example 5:

in the utility model, the spinning equipment further comprises a first spinning roller 31 and a second spinning roller 32, the first spinning roller 31 guides the tows 1 into the water washing tank 3 and/or the oiling tank, the second spinning roller 32 guides the tows 1 out of the water washing tank 3 and/or the oiling tank, and the dividing screw 21 is arranged between the first spinning roller 31 and the second spinning roller 32. The tows in the rinsing tank 3 and/or the upper oiling tank are guided out by the first spinning roller 31, are divided by the splitting tank 22 on the splitting rod 21, and are guided out by the second spinning roller 32.

In this embodiment, through dividing lead screw 21 to set up between first spinning roller 31 and second spinning roller 32, avoided tow 1 in by first spinning roller 31 to second spinning roller 32 transportation process, mutual adhesion, perhaps produced disconnected silk, reduced the parking that arouses by disconnected silk, promoted the production efficiency of precursor to the quality of precursor has effectively been improved.

Preferably, the central axis of the dividing rod 21 is parallel to the central axes of the first spinning roller 31 and the second spinning roller 32, so that the stress of the filament bundle 1 on the first spinning roller 31, the second spinning roller 32 and the dividing rod 21 is more uniform, the mechanical property of the filament bundle 1 is improved, and the mechanical property of the filament bundle 1 is more uniform and stable.

Further preferably, the distance from the dispensing rod 21 to the second spinning roller 32 is less than 1/5 of the distance from the first spinning roller 31 to the second spinning roller 32. That is, the dividing screw 21 is arranged close to the second spinning roller 32 in the utility model, so as to ensure that the tows 1 passing through the second spinning roller 32 are isolated from each other and do not wind, thereby providing greater convenience for subsequent drafting.

Further, as an embodiment of the present embodiment, the distance from the dividing rod 21 to the second spinning roller 32 is 50-100 cm; preferably, the distance between the dividing screw 21 and the second spinning roller 32 is 80-100cm, so that mutual independence of tows is further ensured, and the phenomena of twisting, yarn breakage, adhesion and broken yarns are avoided.

Example 6:

as another embodiment of the present invention, the rinsing bath 3 and/or the upper oil bath have oppositely disposed mounting seats 4, two ends of the tapping rod 21 have mounting shafts 23 disposed along the central axis direction of the tapping rod 21, and the mounting shafts 23 are detachably disposed on the mounting seats 4. Can dismantle the change according to actual demand in the production process to dividing silk pole 21, the user can select corresponding branch silk device 2 according to the quantity of the single precursor of the silk bundle 1 of actual production, when promoting the silk bundle 1 collectibility, increases the full bobbin rate of silk bundle 1.

In an embodiment of the present invention, the mounting seat 4 has a mounting hole 41, a central axis of the mounting hole 41 is the same as a central axis of the mounting shaft 23, and the mounting shaft 23 is inserted into the mounting hole 41 and connected to the mounting hole 41. The mounting shaft 23 can move in the mounting hole 41 along the central axis direction of the mounting hole 41, and a user can adjust the position of the mounting shaft 23 according to the actual position of the tow 1, and further adjust the position of the split rod 21, so that the tow 1 can fall into the split groove 22 on the split rod 21.

In another embodiment of this embodiment, the mounting seat 4 has a fastening hole 43 communicating with the mounting hole 41, and the spinning apparatus further includes a fastening member 42, wherein the fastening member 42 is inserted into the fastening hole 43 and abuts against the mounting shaft 23 in the mounting hole 41 to position the mounting shaft 23. After the user adjusts the position of the installation shaft 23, the installation shaft 23 can be positioned through the fastening piece 42, and the situation that the position of the filament bundle 1 moves in the operation process of the filament bundle 1 to cause that the filament bundle 1 cannot fall into the filament separating groove 22 completely is avoided.

More specifically, the fastening hole 43 is a threaded hole, and the fastening member 42 is a bolt inserted into the threaded hole to abut against the mounting shaft 23. The bolt is inserted into the threaded hole and is in threaded connection with the threaded hole, the connection mode is stable and reliable, and when a user needs to adjust the position of the tapping rod 21, the bolt is screwed out, so that adjustment can be performed.

In the utility model, as shown in fig. 4, the mounting seat 4 comprises an upper arc-shaped support plate 44 and a lower arc-shaped support plate 45, the upper arc-shaped support plate 44 is detachably connected with the lower arc-shaped support plate 45, and the upper arc-shaped support plate 44 and the lower arc-shaped support plate 45 are buckled to form the mounting hole 41.

Specifically, the upper arc-shaped support plate 44 and the lower arc-shaped support plate 45 are fixedly connected through a fastening screw 46. The mounting means is simple, and go up arc backup pad 44 and with arc backup pad 45 forming means is simple down, the user can be according to the model of the installation axle 23 of difference, change different last arc backup pad 44 and with arc backup pad 45 down for the practicality of mount pad 4 is stronger.

The utility model also discloses a polyacrylonitrile carbon fiber precursor, wherein the full bobbin percentage of the polyacrylonitrile carbon fiber precursor is more than or equal to 85 percent, the broken filament percentage is 0-0.235 percent, the breaking strength is more than or equal to 5.8cN/dtex, and the breaking elongation is more than or equal to 13.0 percent.

Preferably, the broken filament rate of the polyacrylonitrile carbon fiber precursor is 0-0.147%.

The polyacrylonitrile carbon fiber precursor with the number of the monofilaments in the tow 1 being 1K-24K has the full bobbin rate of 85-90 percent, the breaking strength of 5.8-6.8cN/dtex and the elongation at break of 13-17 percent.

The polyacrylonitrile carbon fiber precursor with the number of the monofilaments in the tow 1 of 25K-50K has the full bobbin rate of 93-95%, the broken filament rate of 0-0.148%, the breaking strength of 6.3-6.8cN/dtex and the elongation at break of 15-17%;

preferably, the polyacrylonitrile carbon fiber precursor is produced by the spinning equipment in any one of the embodiments.

The utility model also provides the following experimental examples:

experimental example 1:

in this experimental example, 1K, 3K, 12K, and 25K filaments were produced and prepared by the spinning apparatus of example 5, and the filament ratios of a plurality of groups of filaments were measured, wherein the filament ratio is filament axis number/total axis number.

In the present invention, the broken filament detection criteria are shown in table 1 below:

table 1:

according to the detection standards of table 1, if the broken filaments in the detected single-axis precursor do not meet the detection standards of table 1, the single-axis precursor is regarded as unqualified, and the single-axis precursor is the broken filament shaft.

The percentage of fuzz of the strand obtained in example 5 is shown in table 2 below:

table 2:

as is clear from table 2 above, the filament yields of the 1K, 3K, 12K, and 25K filaments prepared in example 5 were low. Namely, the protofilament prepared by the method has good quality.

Comparative example 1:

the difference between the comparative example and the experimental example 1 is that the spinning equipment adopted by the comparative example is not provided with the filament separating device 2 in the spinning process. The 1K, 3K, 12K and 25K protofilaments were produced and prepared in this comparative example, and the fuzz rate of a plurality of groups of protofilaments was monitored and counted as shown in Table 3 below:

table 3:

as can be seen from tables 2 and 3 of experimental example 1 and comparative example 1, the filament rate of the strands produced by the spinning apparatus of the present invention was much lower than that of the strands obtained in comparative example 1. Through setting up branch silk device 2 in spinning equipment can effectively promote protofilament intensity promptly, reduce the production of broken filament, promoted the quality of protofilament.

Experimental example 2:

in this experimental example, 1K, 12K, 25K, 26K, 35K, and 50K filaments were produced and prepared by the spinning apparatus of example 5, and the full package percentage of the plurality of filaments was measured.

The method comprises the steps that tows have the laying length along the axial direction of a filament tube on the filament tube, the corresponding laying lengths are preset for the tows of different specifications respectively, and in the production process, when the actual laying length is larger than or equal to the preset laying length, the tows are judged to be full, otherwise, the tows are not full. The full bobbin rate is the number of full bobbins/total number of production bobbins.

Specifically, the criteria for the full package rate are shown in the following table:

according to the above criteria, if the detected single strand is laid in a length that meets the detection criteria in table 1, it is considered that the strand is full.

The results are shown in table 4 below:

table 4:

variety of (IV) C	Total cylinder number (number)	Number of full bobbin	Percentage of full cylinder%
				1K	700	595	85
12K	650	598	92
				24K	710	675	95
25K	690	662	96
				35K	700	686	98
50K	720	713	99

As can be seen from table 4 above, the 1K, 12K, 25K, 26K, 35K, and 50K strands prepared in example 5 had high full package percentage.

Comparative example 2:

the difference between the comparative example and the experimental example 2 is that the spinning equipment adopted in the comparative example is not provided with a yarn separating device in the spinning process. The comparative example produces and prepares 1K, 12K, 25K, 26K, 35K and 50K protofilaments, and detects the full bobbin percentage of a plurality of groups of protofilaments, and the detection results are shown in the following table 5:

table 5:

variety of (IV) C	Total cylinder number (number)	Number of full bobbin	Percentage of full cylinder%
				1K	700	560	80
12K	650	533	82
				24K	710	596	84
25K	690	587	85
				35K	700	609	87
50K	720	648	90

As can be seen from tables 4 and 5 of experimental example 2 and comparative example 2, the full package fraction of the strands obtained by the spinning apparatus of the present invention is much higher than that of the strands obtained in comparative example 2, that is, the production efficiency of the strands produced by the spinning apparatus of the present invention is high.

Experimental example 3:

in this experimental example, 1K, 12K, 25K, 26K, 35K, and 50K strands were produced and prepared by the spinning apparatus of example 5, and the breaking strength and the breaking elongation of a plurality of groups of strands were measured, and the measurement results are shown in table 6 below:

table 6:

variety of (IV) C	Breaking strength (cN/dtex)	Elongation at Break (%)
			1K	6.4	13.00
12K	6.6	13.95
			24K	6.7	14.00
25K	6.7	14.05
			35K	6.7	14.89
50K	6.8	14.00

As can be seen from table 6, the raw yarn prepared by the spinning apparatus of the present invention has high breaking strength and elongation at break, i.e., the raw yarn produced by the spinning apparatus of the present invention has good mechanical properties.

According to the utility model, the filament separating device 2 is arranged on the spinning equipment, so that the full bobbin rate of the precursor filaments is increased, and the spinning efficiency of the precursor filaments is effectively improved. Meanwhile, through the arrangement of the filament dividing device 2, the quality of the protofilament is improved, broken filaments and broken filaments are reduced, and the breaking strength and the breaking elongation of the protofilament are improved.

The above embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention in any way, and although the present invention has been disclosed by the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications to the equivalent embodiments by using the technical contents disclosed above without departing from the technical scope of the present invention, and the embodiments in the above embodiments can be further combined or replaced, but any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims (10)

1. The utility model provides a divide silk device, includes and divides the lead screw and a plurality of branch silk grooves that set up along axial interval on dividing the week lateral wall of lead screw, every branch silk groove circumference sets up, divide the silk groove to include notch and tank bottom, its characterized in that: the width of the wire dividing groove is reduced from the groove opening to the groove bottom.

2. A filament separating device according to claim 1, wherein: the wire dividing groove comprises an inner side wall connecting the groove opening and the groove bottom, and the inner side wall is obliquely arranged from the groove opening to the groove bottom.

3. A filament separating device according to claim 2, wherein: the inner side wall is arranged smoothly.

4. A filament separating device according to any one of claims 1 to 3, wherein: the width of the dividing groove is in positive correlation with the number of filaments forming the filament bundle.

5. A filament separating device according to claim 4, wherein: the number of the monofilaments forming the filament bundle is 1K-3K, and the width of the notch of the filament dividing groove is 6-12 mm;

and/or the number of the monofilaments forming the filament bundle is 6K-12K, and the width of the notch of the filament dividing groove is 10-18 mm;

and/or the number of the monofilaments forming the filament bundle is 24K-25K, and the width of the notch of the filament dividing groove is 20-30 mm;

and/or the number of the monofilaments forming the filament bundle is 35K-50K, and the width of the notch of the filament dividing groove is 35-50 mm.

6. A spinning apparatus, characterized by: comprising a filament separating device according to any one of claims 1 to 5.

7. A spinning apparatus according to claim 6, characterised in that: the central axis of the yarn dividing rod is positioned below the plane of the yarn bundle, and the yarn dividing groove is at least partially positioned above the plane of the yarn bundle.

8. A spinning apparatus according to claim 6, characterised in that: still include first spinning roller and second spinning roller, first spinning roller is with leading-in wash bowl and/or the last oil bath of silk bundle, the second spinning roller is with leading-out wash bowl and/or the last oil bath of silk bundle, the depiler sets up between first spinning roller and the second spinning roller.

9. A spinning apparatus according to claim 8, characterised in that: the wash bowl and/or go up the mount pad that has relative setting on the oil groove, the both ends of dividing the lead screw have along the installation axle that divides lead screw central axis direction to set up, installation axle detachably sets up on the mount pad.

10. A polyacrylonitrile carbon fiber precursor is characterized in that: the full bobbin rate of the polyacrylonitrile carbon fiber precursor is more than or equal to 85 percent, and the broken filament rate is 0 to 0.235 percent.

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