CN111910271B - Spinning equipment and slow cooling device thereof - Google Patents
Spinning equipment and slow cooling device thereof Download PDFInfo
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- CN111910271B CN111910271B CN202010567230.1A CN202010567230A CN111910271B CN 111910271 B CN111910271 B CN 111910271B CN 202010567230 A CN202010567230 A CN 202010567230A CN 111910271 B CN111910271 B CN 111910271B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
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Abstract
The invention discloses spinning equipment and a slow cooling device thereof, wherein the slow cooling device comprises a vent window with a hollow cavity, a vent window jacket is sleeved outside the vent window, a gas channel for gas to pass through is arranged between the vent window jacket and the vent window, a plurality of gas outlet layers are axially arranged on the side wall of the vent window, any gas outlet layer is provided with a gas outlet slit, and the width of the gas outlet slit of each gas outlet layer along the flow direction of gas flow is gradually reduced along the flow direction of gas flow; the gas inlet unit is communicated with the gas channel, and a gas rectifier is arranged between the gas inlet unit and the gas channel. The present invention makes the amount of gas supplied into the hollow chamber gradually increased along the direction in which the nascent fiber passes, and can balance the instability of the pressure field and the temperature field of the gas caused by the passive replenishment of cold air into the hollow chamber, thereby contributing to the improvement of spinnability and fiber quality.
Description
Technical Field
The invention belongs to the technical field of structural design and application of fiber processing devices, and particularly relates to spinning equipment and a slow cooling device thereof.
Background
Melt spinning is one of the main processes for the preparation of chemical fibers, and melt spinning generally comprises the following steps: melting spinning raw materials, metering a molten spinning solution, extruding the spinning solution, cooling the spinning solution to form nascent fiber, stretching, oiling and winding.
For industrial yarn, whether high-strength high-modulus or high-modulus low-shrinkage industrial yarn, the high mechanical property is determined due to the special application. In the case of microaggregate structures, a prerequisite for achieving high mechanical properties is that the industrial filaments be oriented to the greatest possible extent.
The most significant factor influencing the quality of the primary fiber in the melt spinning process is the process of cooling the spinning melt trickle ejected from the spinneret plate into the primary fiber, the quality of the melt trickle cooling process directly influences the quality of the filament, and the cooling process of the melt is also accompanied with the recrystallization of the polymer and the redistribution process of crystal lattices, so that the cooling quality directly determines the finished quality of the filament.
Since the melt is usually ejected from the spinneret at a high temperature of several hundred degrees celsius, if it is cooled rapidly, it affects the crystallization of the polymer in the filaments, so that in the spinning process of partially melt-spun chemical fibers, such as in the spinning process of high-strength high-modulus industrial filaments, a slow cooling device is required between the spinneret and the side-blowing window in order to cool the nascent fibers slowly.
The slow cooler is generally a cavity round sleeve with two open ends, has the functions of heating and temperature control, can heat the atmosphere in the cavity and control the process temperature, and the nascent fiber can be slowly cooled after passing through the hot atmosphere in the cavity. The slow cooling can reduce the orientation degree of the nascent fiber, reduce the influence of a sheath-core structure and improve the draft multiple of the nascent fiber, thereby improving the mechanical property of the terminal fiber.
The slow cooler in the prior art is only a single cavity round sleeve with a heating control function, partial gas and heat can be taken away by fibers passing through the cavity hot atmosphere, and then new external cold air is passively supplemented into the cavity, so that an unstable air pressure field and an unstable air temperature field are generated in the cavity of the slow cooler. The unstable air pressure field can generate turbulent air flow, which disturbs the fiber in the stretching process of the melt nozzle, reduces the spinning stability and increases the unevenness of the fiber; the unstable air temperature field can cause the cooling working condition of the fiber on the spinning course to fluctuate, and the unevenness of the fiber can be increased; in addition, the cold air passively fed in is ambient air, the condition is not constant, and the spinning working condition is uncontrollable and unstable.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a slow cooling device for spinning equipment, aiming at improving the stability of a gas pressure field and a temperature field in the slow cooling device.
Another object of the present invention is to provide a spinning apparatus, comprising the slow cooling device for spinning apparatus.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a slow cooling device for spinning equipment, is including the transom window that goes out that has well plenum chamber, the outside cover that goes out the transom window is equipped with a transom window overcoat, go out the transom window overcoat with it is used for the gas passage that gas passes through to have between the transom window, be equipped with a plurality of layers of giving vent to anger along the axial on the lateral wall of going out the transom window, arbitrary layer of giving vent to anger all is provided with the slit of giving vent to anger, and the slit of giving vent to anger on each layer of giving vent to anger diminishes along the air current flow direction along the axial width gradually.
In the above scheme, the width of the air outlet slit along the air flow direction is gradually reduced along the air flow direction, the active air supply function of the air outlet window to the hollow cavity is increased, the conditions of air flow disturbance and temperature fluctuation generated in the stretching process of the melt sprayer are greatly improved, and the uniformity of the mechanical property of the nascent fiber is improved.
The gas inlet unit is communicated with the gas channel, and a gas rectifier is arranged between the gas inlet unit and the gas channel;
preferably, the air inlet unit comprises two air inlet pipes, and the two air inlet pipes are symmetrically arranged around the center of the air outlet window.
In the above scheme, the two air inlet pipes are symmetrically arranged about the center of the air outlet window, so that the spiral flowing state of the air flow can be further relieved, and the uniformity of the air flow is improved.
Furthermore, the gas rectifier comprises at least two annular rectifying plates which are stacked, rectifying slits are arranged on the annular rectifying plates, and the rectifying slits on two adjacent annular rectifying plates are arranged in a staggered manner;
preferably, the shape of the rectifying slit is selected from one or any combination of a circular slit, a strip slit, a square slit or an irregular slit.
Furthermore, the rectifying slits are distributed on the annular rectifying plate in a radial shape;
preferably, the equivalent dimension of the width of the rectifying slit in the circumferential direction is in the range of 0.5mm to 5 mm;
preferably, the distance between two adjacent rectifying slits in the circumferential direction ranges from 4mm to 6 mm.
In the above scheme, a space for gas to pass through is arranged between the two overlapped annular rectifying plates, the main body of each annular rectifying plate is provided with a rectifying slit for gas to pass through, and the gas firstly passes through a gas rectifier formed by overlapping and splicing a plurality of layers of annular rectifying plates in a staggered manner before entering a gas channel through the gas inlet unit. The gas rectifier in the scheme has the advantages of simple structure, easiness in realization and convenience in manufacturing, and the gas rectifier is simple and effective, so that the uniformity of the gas inflow can be further improved.
Furthermore, any air outlet layer is provided with even number of air outlet slits, and the air outlet slits arranged oppositely are symmetrical about the center of the air outlet window.
Further, the shape of the air outlet slit is selected from one or any combination of a round slit, a strip slit, a square slit or an irregular slit;
preferably, the width of the air outlet slit of each air outlet layer along the airflow flowing direction has an equivalent dimension along the airflow flowing direction in a range of 0.5mm to 20 mm.
In the scheme, the even number of air outlet slits are arranged on each air outlet layer of the air outlet window, so that when air enters the hollow cavity through the even number of air outlet slits, the uniformity of air flow can be kept, and the stability of an air field in the hollow cavity, including a pressure field and a temperature field, is improved. The outlet slits are arranged to be symmetrical about the center of the outlet window, so that the uniformity of the gas flow can be further improved.
Furthermore, a temperature control unit for adjusting and controlling the temperature of the gas in the hollow cavity is arranged outside the air outlet window sleeve;
preferably, the temperature control unit adjusts and controls the variation range of the gas temperature in the hollow cavity to be 320-400 ℃.
Further, the gas heating device also comprises a gas heating unit, wherein the gas heating unit is connected with the gas inlet unit;
preferably, the gas heating unit comprises electric heating or heating with a heating medium.
Further, the gas source unit is used for supplying gas and is connected with the gas heating unit;
preferably, a flow control unit is arranged between the gas source unit and the gas heating unit.
In the scheme, the gas temperature is set and the flow is adjusted by arranging the gas source, the flow control unit, the gas heating unit and the temperature control unit, so that the gas with adjustable temperature is quantitatively supplied.
A spinning device comprises the slow cooling device for the spinning device.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
1. The invention sets the air quantity supplied to the hollow chamber to be gradually reduced along the air flow direction of the air in the air passage, namely, the air quantity supplied to the hollow chamber is gradually increased along the passing direction of the primary fiber, thereby balancing the instability of the pressure field and the temperature field of the air caused by the passive supplement of cold air to the hollow chamber, and being beneficial to improving the spinnability and the quality of the fiber.
2. The two air inlet pipes are symmetrically arranged relative to the center of the air outlet window, so that the spiral flowing state of air flow can be further relieved, and the uniformity of the air flow is improved.
3. According to the invention, a space for gas to pass through is formed between the two stacked annular rectifying plates, the rectifying slits for gas to pass through are formed in the main body of each annular rectifying plate, and the gas passes through the gas rectifier formed by stacking and splicing the multiple layers of annular rectifying plates before entering the gas channel through the gas inlet unit, so that the gas rectifier is simple in structure, easy to realize, convenient to manufacture, simple and effective, and can further improve the uniformity of gas inlet flow.
4. The gas temperature control device is provided with the gas source, the flow control unit, the gas heating unit and the temperature control unit, so that the gas temperature is set and the flow is adjusted, the gas with adjustable temperature is quantitatively supplied, and the stability of the spinning working condition is facilitated.
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 invention, 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 without limiting the invention 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 slow cooling device according to the present invention;
FIG. 2 is a sectional view showing a part of the structure of the slow cooling apparatus of the present invention;
FIG. 3 is a schematic view of a fairing according to the invention;
in the figure: 1. a gas source; 2. a flow control unit; 3. a gas heating unit; 4. an air outlet window assembly; 41. a vent window; 42. a vent window outer sleeve; 43. a gas channel; 5. a hollow chamber; 7. an air outlet slit; 8. an air intake unit; 9. a gas rectifier; 10. an annular rectifying plate; 11. a rectifying slit; 12. a temperature control unit; 13. and a heat preservation unit.
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.
As shown in fig. 1 to 3, the present invention provides a slow cooling device for a spinning apparatus, including an air outlet window 41 having a hollow chamber 5, an air outlet window jacket 42 is sleeved outside the air outlet window 41, the air outlet window 41 and the air outlet window jacket 42 constitute an air outlet window assembly 4, an air passage 43 for passing air is provided between the air outlet window jacket 42 and the air outlet window 41, a plurality of air outlet layers are axially provided on a side wall of the air outlet window 41, any air outlet layer is provided with an air outlet slit 7, and the air outlet slit 7 of each air outlet layer gradually decreases along the axial width along the airflow flowing direction.
In detail, the slow cooling device is used for slowly cooling the nascent fiber in the spinning process of the high-strength high-modulus industrial yarn. This is because if the slow cooling device is not added, the outer skin of the nascent fiber will be cooled rapidly, becoming a tensile carrier with high orientation; the core of the nascent fiber is subjected to lower tension and lower orientation, and the lower orientation is obtained as a result of the addition of the sheath and the core; also, this severe skin-core layer structure inconsistency can lead to a reduction in the back stretch, and therefore overall low orientation. It is necessary to add a slow cooling device and the slow cooling device is required to have high temperature stability.
Specifically, the nascent fiber is sprayed out of a spinneret plate, passes through a hot atmosphere in a hollow cavity, and is slowly cooled by a slow cooling device. In the prior art, the nascent fiber takes away part of gas and heat when passing through the hot atmosphere in the hollow chamber, and then new external cold air is passively supplemented into the hollow chamber from the side far away from the spinneret plate, so that unstable pressure field and temperature field are generated by the gas in the hollow chamber. The unstable pressure field can generate turbulent airflow to disturb the fibers in the stretching process of the melt nozzle, so that the spinning stability is reduced, and the unevenness of the fibers is increased; the unstable temperature field can cause the cooling working condition of the fiber on the spinning course to fluctuate and can also increase the unevenness of the fiber; in addition, the cold air passively fed in is ambient air, the condition is not constant, and the spinning working condition is uncontrollable and unstable.
That is, when the temperature of the field in the slow cooling device is unstable, i.e. the working condition of the microstructure of the nascent fiber is unstable, the microstructure is different in the length direction of the fiber, and macroscopically shows as uneven performance.
When the air pressure in the slow cooling device is unstable, airflow disturbs the nascent fiber, namely the tension on the nascent fiber fluctuates, and the microstructure of the nascent fiber is different and the performance of the nascent fiber is uneven.
Therefore, as shown in fig. 2, the sidewall of the air outlet window 41 for supplying air into the hollow chamber 5 is provided with a plurality of air outlet layers along the axial direction, any air outlet layer is provided with an air outlet slit 7, and the width of the air outlet slit 7 of each air outlet layer along the airflow flowing direction is gradually reduced along the airflow flowing direction. I.e. the amount of gas supplied into the hollow chamber 5 is gradually decreased in the direction of the gas flow in the gas passage 43, i.e. the amount of gas supplied into the hollow chamber 5 is gradually increased in the direction in which the primary fibers pass. Therefore, the instability of the pressure field and the temperature field of the gas caused by the passive supplement of the cold air into the hollow cavity 5 is balanced, and the uniformity of the mechanical property of the nascent fiber is improved.
In the above scheme, the width of the air outlet slit 7 along the air flow direction is gradually reduced along the air flow direction, so that the active air supply function of the air outlet window 41 to the hollow cavity 5 is increased, and the conditions of air flow disturbance and temperature fluctuation generated in the stretching process of the melt sprayer are greatly improved.
Further, the slow cooling device of the present invention further includes an air inlet unit 8 for supplying air into the air passage 43. The air inlet unit 8 is communicated with the gas channel 43, and a gas rectifier 9 is arranged between the air inlet unit 8 and the gas channel 43; preferably, the air intake unit 8 includes two air intake pipes, and the two air intake pipes are symmetrically arranged about the center of the air outlet window 41.
The gas is supplied into the gas passage 43 through the gas inlet unit 8, and the gas supplied into the gas passage 43 by the gas inlet unit 8 spirally rises along the gas passage 43, so that the resistance to the flow of the gas is large. According to the invention, the gas rectifier 9 is arranged between the gas inlet unit 8 and the gas channel 43, so that the spirally rising gas flow is changed into the vertically rising gas flow, the flowing resistance of the gas flow can be effectively reduced, and the slow cooling effect of the slow cooling device is improved.
In some embodiments of the present invention, the air intake unit 8 includes two air intake pipes, and the two air intake pipes are symmetrically disposed about the center of the air outlet window 41. The spiral flowing state of the air flow can be further relieved, and the uniformity of the air flow is improved.
In the above solution, the gas actively supplied by the gas inlet unit 8 may be compressed air, inert gas or liquid vapor such as water vapor: compressed air is typically selected, inert gas may be selected when it is desired to reduce the effects of high temperature thermal oxidation, and water vapor may be selected when humidification is desired. The adaptability can be adjusted according to different conditions of the nascent fiber.
In some embodiments of the present invention, as shown in fig. 3, the gas rectifier 9 includes at least two stacked annular rectifying plates 10, the annular rectifying plates 10 are provided with rectifying slits 11, and the rectifying slits 11 on two adjacent annular rectifying plates 10 are arranged in a staggered manner.
In detail, a space for gas to pass through is formed between two stacked annular rectifying plates 10, rectifying slits 11 for gas to pass through are formed in the main body of each annular rectifying plate 10, and the gas passes through a gas rectifier 9 formed by stacking and splicing a plurality of layers of annular rectifying plates 10 before entering a gas channel 43 through a gas inlet unit 8.
The gas rectifier 9 in the scheme has the advantages of simple structure, easiness in realization and convenience in manufacturing. The compact and efficient gas rectifier 9 can further improve the uniformity of the intake air flow.
Preferably, the shape of the rectifying slits 11 is selected from one or any combination of a circular slit, a stripe slit, a square slit, or an irregular slit.
Further, the rectifying slits 11 are radially distributed on the annular rectifying plate 10.
Preferably, the equivalent dimension of the width of the rectifying slit 11 in the circumferential direction is in the range of 0.5mm to 5 mm.
Preferably, the distance between two adjacent rectifying slits 11 in the circumferential direction ranges from 4mm to 6 mm.
In the above scheme, the equivalent size of the width of the rectifying slits 11 along the circumferential direction, the distance between two adjacent rectifying slits 11 along the circumferential direction, and the number of layers of the annular rectifying plates 10 can be adaptively adjusted according to different conditions of the nascent fiber, so that the slow cooling device of the invention can be suitable for the slow cooling process of the nascent fiber with various specifications.
Further, the flow rate of the gas supplied into the gas rectifier 9 by the gas inlet unit 8 is related to the total fineness of the primary fibers, and the larger the total fineness is, the larger the gas flow rate should be, but the flow rate of the gas supplied into the gas rectifier 9 by the gas inlet unit 8 is generally less than 5m3/min。
Preferably, the air intake amount should be selected differently according to the specifications of the primary fibers. The total fineness is large, the air input is large, an annular rectifying plate with a large-size rectifying slit is selected, and the number of layers of the annular rectifying plate is increased.
In order to achieve better slow cooling effect, the distance between the uppermost end of the gas rectifier 9 and the nearest air outlet slit 7 is 10-30mm, preferably 20 mm.
In some embodiments of the present invention, any one of the air outlet layers of the air outlet window 41 is provided with an even number of air outlet slits 7, and the oppositely arranged air outlet slits 7 are symmetrical with respect to the center of the air outlet window 41.
In the above scheme, each gas outlet layer of the gas outlet window 41 is provided with even number of gas outlet slits 7, so that when gas enters the hollow chamber 5 through the even number of gas outlet slits 7, the uniformity of gas flow can be maintained, and the stability of a gas field in the hollow chamber 5, including a pressure field and a temperature field, is improved. The uniformity of the gas flow rate can be further improved by arranging the gas outlet slits 7 symmetrically with respect to the center of the gas outlet window 41.
In some embodiments of the present invention, the shape of the air outlet slit 7 is selected from one of a circular slit, a stripe slit, a square slit, or an irregular slit, or any combination thereof.
Preferably, the width of the air outlet slit 7 of each air outlet layer along the air flow direction is in the range of 0.5mm to 20mm along the equivalent dimension of the air flow direction.
In the above solution, as shown in fig. 2, the present invention sets the width of the air outlet slit 7 of each air outlet layer to be gradually reduced along the air flow direction, and the equivalent dimension of the width of the air outlet slit 7 of each air outlet layer along the air flow direction is in the range of 0.5mm to 20 mm. Therefore, for example, when 20 air outlet layers are disposed on the air outlet window 41, the width of the air outlet slits 7 of each air outlet layer along the air flow direction may be set to an arithmetic progression with 20mm as the initial width and 1mm as the tolerance, so that when the spinneret plate is disposed above the slow cooling device, the air flow direction is from bottom to top, the width of the air outlet slit 7 at the lowermost position is 20mm, and the width of the air outlet slit 7 at the uppermost position is 1mm, and the arrangement is gradually increased from top to bottom.
The width of the air outlet slit 7 along the airflow flowing direction, namely the size in the height direction, is set to be gradually increased from top to bottom, so that when the nascent fiber passes through the hollow chamber 5 from top to bottom, part of the airflow in the hollow chamber 5 can be taken away at the lower end of the hollow chamber 5, at the moment, the width of the air outlet slit 7 of the air outlet layer close to the air outlet window 41 is larger, the flow of the gas entering the hollow chamber 5 can be supplemented to be larger, the part of the gas is heated, and the part of the gas has certain heat, so that the instability of the pressure field and the temperature field of the gas caused by the fact that cold air is passively supplemented to the hollow chamber 5 can be balanced. The air pressure and the air temperature stability of the air field in the hollow cavity 5 are improved in an optimized mode, the stretching process of the melt spray head is stable, the primary fiber cooling process is stable and controllable, and the influence of a skin-core structure is reduced, so that the spinnability and the fiber quality are improved.
In some embodiments of the present invention, a temperature control unit 12 for adjusting and controlling the temperature of the gas in the hollow chamber 5 is disposed outside the air outlet window housing 42. Preferably, the outside of the temperature control unit 12 is further sleeved with a heat preservation unit 13, which can preserve heat of the gas in the hollow cavity 5 and keep the temperature of the gas constant.
Preferably, the temperature control unit 12 adjusts and controls the variation range of the gas temperature in the hollow chamber 5 to be 320-400 ℃.
Further, the slow cooling device further comprises a gas heating unit 3, and the gas heating unit 3 is connected with the gas inlet unit 8.
Preferably, the gas heating unit 3 includes electric heating or heating medium heating.
Specifically, the gas supplied into the hollow chamber 5 is heated by the gas heating unit 3, and the heating form may include various forms as long as the object of heating the gas in the present invention is achieved, such as the gas heating unit 3 includes electric heating or heating medium heating, etc. For example, if the heating temperature of the gas is set to 330 ℃, the temperature of the gas in the hollow chamber 5 can be set to 320 ℃ in the temperature control unit 12.
Of course, the gas heating unit 3 should also be provided with a control unit for controlling the heating temperature of the gas.
In the above solution, the present invention provides a combination of the gas heating unit 3 and the temperature control unit 12, so as to ensure that the temperature of the gas supplied into the hollow chamber 5 does not fluctuate, and further improve the stability of the pressure field and the temperature field of the gas in the hollow chamber 5.
Moreover, the gas heating unit 3 is independently arranged to heat the gas and then supply the heated gas into the gas outlet window 41, so that the gas can be heated more uniformly, and the adverse effect on the pressure field and the temperature field of the gas caused by nonuniform heating of the gas is avoided.
In some embodiments of the present invention, the slow cooling device further comprises a gas source 1 unit for supplying gas, and the gas source 1 unit is connected with the gas heating unit 3.
Preferably, a flow control unit 2 is arranged between the gas source 1 unit and the gas heating unit 3.
In the foregoing embodiments of the present invention, the gas actively supplied through the gas intake unit 8 may be compressed air, inert gas, or liquid vapor such as water vapor: compressed air is typically selected, inert gas may be selected when it is desired to reduce the effects of high temperature thermal oxidation, and water vapor may be selected when humidification is desired. The adaptability can be adjusted according to different conditions of the nascent fiber.
Therefore, the slow cooling device is also provided with an air source 1 for providing compressible air or inert gas or liquid steam, so that the continuity of air supply into the hollow chamber 5 is ensured fundamentally, and the stability of the air pressure and the air temperature of an air field inside the hollow chamber 5 is further improved.
Preferably, a flow control unit 2 for gas flow is further arranged between the gas source 1 unit and the gas heating unit 3. For example, the flow control unit 2 of the present invention can control the gas flow within the range of 0-10 m3H is used as the reference value. When the gas provided by the gas source 1 is compressed air, the flow control unit 2 can control the flow of the compressed air to be 0.5m3/h。
In the scheme, as shown in fig. 1, the gas source 1, the flow control unit 2, the gas heating unit 3 and the temperature control unit 12 are arranged to set the temperature and regulate the flow of the gas, so that the gas with adjustable temperature is quantitatively supplied, and the stability of the spinning working condition is facilitated.
The slow cooling device has practicability, has practical effects on providing slow cooling and gas protection functions, and is beneficial to improving the stability of the spinning process and improving the quality of fibers. And the application range is wide, and the method can be applied to various spinning machines such as pre-oriented yarns, fully drawn yarns and the like.
In some embodiments of the present invention, there is also provided a spinning apparatus, which can be applied to various spinning processes such as pre-oriented yarn, fully drawn yarn, etc., preferably a melt spinning apparatus.
The industrial yarn mainly utilizes the mechanical property, and has higher requirement on the uniformity of the mechanical property, so the control on the aggregation state structure is required to be accurate.
The spinning equipment comprises the slow cooling device and the spinneret plate, wherein the slow cooling device is arranged below the spinneret plate and used for creating a stable air pressure field and a temperature-adjustable and uniform air temperature field in a spinning process, so that a melt nozzle is stable in a stretching process, a fiber cooling process is stable and controllable, and the influence of a sheath-core structure is reduced, thereby being beneficial to improving spinnability and fiber quality.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a slow cooling device for spinning equipment, is including having the air outlet window of well plenum chamber, the outside cover of air outlet window is equipped with the air outlet window overcoat, the air outlet window overcoat with it is used for the gaseous gas passage who passes through to have between the air outlet window, its characterized in that:
the side wall of the air outlet window is provided with a plurality of air outlet layers along the axial direction, any air outlet layer is provided with an air outlet slit, the shape of the air outlet slit is selected from one or any combination of a strip slit, a square slit or an irregular slit, and the width of the air outlet slit of each air outlet layer along the axial direction is gradually reduced along the airflow flowing direction;
the airflow flowing direction is from bottom to top, the nascent fiber passes through the hollow cavity chamber from top to bottom, and the width of the air outlet slits of the air outlet layers along the airflow flowing direction is in an equal difference array.
2. The slow cooling device for the spinning equipment as claimed in claim 1, wherein: the gas inlet unit is communicated with the gas channel, and a gas rectifier is arranged between the gas inlet unit and the gas channel;
the air inlet unit comprises two air inlet pipes, and the two air inlet pipes are symmetrically arranged relative to the center of the air outlet window.
3. The slow cooling device for the spinning equipment as claimed in claim 2, wherein:
the gas rectifier comprises at least two annular rectifying plates which are stacked, rectifying slits are arranged on the annular rectifying plates, and the rectifying slits on two adjacent annular rectifying plates are arranged in a staggered mode;
the shape of the rectifying slit is selected from one of a circular slit, a strip-shaped slit, a square slit or an irregular slit or any combination thereof.
4. The slow cooling device for the spinning equipment as claimed in claim 3, wherein:
the rectifying slits are radially distributed on the annular rectifying plate;
the equivalent size range of the width of the rectifying slit along the circumferential direction is 0.5mm-5 mm;
the interval between two adjacent rectifying slits along the circumferential direction ranges from 4mm to 6 mm.
5. A slow cooling device for a spinning apparatus according to any one of claims 1 to 4, wherein:
any air outlet layer is provided with even number of air outlet slits, and the air outlet slits arranged oppositely are symmetrical about the center of the air outlet window.
6. The slow cooling device for the spinning equipment as claimed in claim 5, wherein:
the width of the air outlet slit of each air outlet layer along the airflow flowing direction has an equivalent dimension along the airflow flowing direction in the range of 0.5mm-20 mm.
7. A slow cooling device for a spinning apparatus according to any one of claims 2 to 4, wherein:
a temperature control unit for adjusting and controlling the temperature of the gas in the hollow cavity is arranged outside the air outlet window sleeve;
the temperature control unit adjusts and controls the change range of the gas temperature in the hollow cavity to be 320-400 ℃.
8. The slow cooling device for the spinning equipment as claimed in claim 7, wherein: the gas heating unit is connected with the gas inlet unit;
the gas heating unit comprises electric heating or heating by a heating medium.
9. The slow cooling device for the spinning equipment as claimed in claim 8, wherein: the gas source unit is connected with the gas heating unit;
and a flow control unit is arranged between the gas source unit and the gas heating unit.
10. A spinning apparatus, characterized by: comprising a slow cooling device for spinning apparatus as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010567230.1A CN111910271B (en) | 2020-06-19 | 2020-06-19 | Spinning equipment and slow cooling device thereof |
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| CN112921422B (en) * | 2021-01-20 | 2022-08-30 | 中国纺织科学研究院有限公司 | Hot box for drawing yarns |
| CN116905101B (en) * | 2023-09-12 | 2024-01-12 | 江苏恒力化纤股份有限公司 | Preparation method of high-quality polyester industrial yarn fiber |
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| CN2063527U (en) * | 1990-03-05 | 1990-10-10 | 宋建昌 | Nitrogen-filled slow cooling device |
| DE4131840A1 (en) * | 1991-09-25 | 1993-04-01 | Bayer Ag | Melt spinning polymeric optical fibre - by melt spinning using short insulated calming zone pressing against spinneret then cooling fibre in adjacent non-contact cooling zone |
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| CN102296372A (en) * | 2011-08-19 | 2011-12-28 | 苏州龙杰特种纤维股份有限公司 | Air blast cooling method and device for spinning coarse denier fiber |
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| CN203238362U (en) * | 2013-03-17 | 2013-10-16 | 浙江德科实业有限公司 | Rectifying layer for side blowing device for spinning |
| CN103352262A (en) * | 2013-07-08 | 2013-10-16 | 常熟市沪联印染有限公司 | Chemical fiber cross air blasting cooling device |
| CN204111954U (en) * | 2014-03-19 | 2015-01-21 | 福建省长乐市山力化纤有限公司 | A kind of with laterally air-cooled spinning shaft |
| CN206385280U (en) * | 2016-12-28 | 2017-08-08 | 福建闽瑞环保纤维股份有限公司 | A kind of ring blowing device in the cooling wind path that can stretch |
| CN206666688U (en) * | 2017-03-21 | 2017-11-24 | 长乐力恒锦纶科技有限公司 | A kind of spinning of high-strength polyamide 6 spins journey quenching air window with long |
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| CN111910271A (en) | 2020-11-10 |
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