Side blowing cooling device of polypropylene fiber spinning machine

Abstract

The utility model provides a side blowing cooling device of a polypropylene fiber spinning machine, which relates to the technical field of polypropylene fiber spinning and comprises a device body, the device body sequentially comprises a blowing port, a connecting section, an air supply pipeline, a blowing fan and an air control box from front to back, and the side wall of the air control box is provided with an air inlet notch and an air outlet. The air control mechanism comprises a driving motor, a driving lead screw and a blocking sliding piece, a driving nut is fixed to a blocking sliding block, the driving nut is in threaded connection with the driving lead screw, the blocking sliding block is attached to the outer wall of the air inlet notch in a sliding mode, and an ultrasonic humidifier and a plate type heater are installed in the air control box. A debugging mechanism is mounted on the inner side of the air outlet and comprises a mounting shell, a condensation pipe, a condensation water tank and a condensation pump. The air speed, the air temperature and the air humidity can be adjusted through the air control box, so that the cooling of the tows by air blowing is kept in an optimal state.

Description

Technical Field

[0001] The utility model relates to the technical field of polypropylene fiber spinning, in particular to a side-blowing cooling device for a polypropylene fiber spinning machine. Background Art

[0002] Side-blowing cooling is a critical step in polypropylene fiber spinning. The polypropylene fiber is extruded from the spinneret through the spinning melt to form a melt stream. This stream is rapidly cooled into nascent fibers by side (annular) air blowing, and the melt eventually forms fibers. Within a distance of approximately 10-15 cm from the spinneret surface, the melt stream maintains a high temperature and good fluidity. This distance is generally a windless zone to prevent the melt stream from being disturbed. Under the action of external forces such as spinning tension, the melt stream quickly stretches and thins, increasing in speed. At the same time, due to contact with the cooling air from the side-blowing cooling system, the stream temperature gradually decreases. When the melt solidifies, fineness changes essentially cease, and the viscous stream becomes a solid fiber.

[0003] Due to the diversity of fiber production specifications, the constant wind speed in the side-blown cooling zone where polypropylene is melt-cooled and formed restricts the cooling and forming of the polypropylene melt. Too fast side-blown cooling will cause a skin-core effect in the tow, and too slow cooling will cause excessive drawing of the spinneret, resulting in perfect crystallization and affecting the winding and drawing process. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a side-blowing cooling device for a polypropylene fiber spinning machine, which solves the problems raised in the above-mentioned background technology.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A side-blowing cooling device for a polypropylene fiber spinning machine comprises a device body, which comprises, from front to back, an air blowing port, a connecting section, an air supply duct, an air blowing fan and an air control box. An air inlet slot and an air outlet are provided on the side wall of the air control box. The width of the air inlet slot gradually increases from top to bottom. The air inlet slot is connected to an air control mechanism. The air outlet is connected to the air supply duct. The air control mechanism comprises a driving motor fixed on the outer wall of the air control box, a driving screw connected to the output end of the driving motor and a blocking slide slidingly fitted on the side wall of the air control box. A driving nut is fixed on the blocking slide, and the driving nut is threadedly connected to the driving screw. The blocking slide slides and fits on the outer wall of the air inlet slot.

[0009] Preferably, a guide rail parallel to the driving screw is installed on the side wall of the air control box, and the blocking slide is slidably installed on the guide rail.

[0010] Preferably, a horizontal partition is provided in the air control box, and the horizontal partition divides the air control box into two upper and lower air supply spaces. An ultrasonic humidifier is installed in the upper air supply space, and a plate heater is installed in the lower air supply space.

[0011] Preferably, a debugging mechanism is installed on the inner side of the air outlet, and the debugging mechanism includes a mounting shell, a condenser, a condensate water tank and a condensate pump. An air intake opening is provided at the upper end of the mounting shell, and a guide impeller is installed on the air intake opening. The side wall of the mounting shell is connected to an exhaust duct, and a connecting flange is provided at the end of the exhaust duct. The air supply duct is connected to the connecting flange, the condenser is connected to the condensate water tank, the condenser pump is installed on the condenser, the condenser passes through the interior of the mounting shell, and a drain pipe is provided on the bottom wall of the mounting shell.

[0012] Preferably, a temperature sensor, a humidity sensor and a wind speed sensor are installed in the air blowing port.

[0013] (3) Beneficial effects

[0014] The utility model provides a side-blowing cooling device for a polypropylene fiber spinning machine, which has the following beneficial effects:

[0015] 1. In the present invention, by arranging an air control mechanism on the outside of the air inlet slot, the air inlet volume in the air control box can be adjusted, thereby changing the speed of the cooling air blown out of the air outlet, making the air blowing uniform and improving the quality uniformity of the tow.

[0016] 2. The utility model humidifies and preheats the air in the air control box through an ultrasonic humidifier and a plate heater, and cools and condenses the air blown out of the air control box through the condenser tube of the debugging mechanism. When used in conjunction with the cooling air, the temperature and humidity of the blown out can be maintained at a stable level, so that the tow can achieve a better cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a side-blowing cooling device for a polypropylene fiber spinning machine according to the present invention;

[0018] Figure 2 It is a structural diagram of the wind control mechanism in this utility model.

[0019] In the figure: 1. Air outlet; 2. Connecting section; 3. Air supply duct; 4. Air blower; 5. Air control box; 6. Air inlet slot; 7. Horizontal partition; 8. Ultrasonic humidifier; 9. Plate heater; 10. Mounting shell; 11. Condensation pipe; 12. Condensate tank; 13. Condensation pump; 14. Intake opening; 15. Exhaust duct; 16. Drive motor; 17. Blocking slide; 18. Drive screw; 19. Drive nut; 20. Guide rail. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1 As shown, a side-blowing cooling device for a polypropylene fiber spinning machine includes a device body, which includes, from front to back, an air blowing port 1, a connecting section 2, an air supply duct 3, an air blowing fan 4 and an air control box 5. A temperature sensor, a humidity sensor and a wind speed sensor are installed in the air blowing port 1. An air inlet slot 6 and an air outlet are provided on the side wall of the air control box 5. The air inlet slot 6 is connected to an air control mechanism, and the air outlet is connected to the air supply duct 3. Under the action of the air blowing fan 4, a negative pressure is generated in the air control box 5, and the outside air is sucked into the air control box 5 through the air inlet slot 6. After passing through the air control box 5, the air is blown out through the air supply duct 3, the connecting section 2 and the air outlet to cool the filament bundle.

[0022] Further, a horizontal partition 7 is provided in the air control box 5, and the horizontal partition 7 divides the air control box 5 into two upper and lower air supply spaces. An ultrasonic humidifier 8 is installed in the upper air supply space, and a plate heater 9 is installed in the lower air supply space. A debugging mechanism is installed on the inner side of the air outlet, and the debugging mechanism includes an installation shell 10, a condenser pipe 11, a condensate water tank 12 and a condensate pump 13. An air intake opening 14 is provided at the upper end of the installation shell 10, and a guide impeller is installed on the air intake opening 14. The side wall of the installation shell 10 is connected to an exhaust pipe 15, and a connecting flange is provided at the end of the exhaust pipe 15. The air supply pipe 3 is connected to the connecting flange, the condenser pipe 11 is connected to the condensate water tank 12, and the condensate pump 13 is installed on the condenser pipe 11. The condenser pipe 11 passes through the interior of the installation shell 10, and a drain pipe is provided on the bottom wall of the installation shell 10, which enters the outside of the air control box 5 under negative pressure. The boundary air is humidified by the ultrasonic humidifier 8, which increases the humidity in the internal air and the specific heat and heat transfer coefficient of the side-blown air, and can improve the cooling efficiency of the cold air on the yarn bundle under the ventilation wind speed. The cold air with a larger humidity enters the installation shell 10 through the air intake opening 14 and contacts the condenser 11 with a lower temperature, which can partially condense the moisture in the air. By setting the temperature in the condensation water tank 12, the humidity of the side-blown air can be controlled to keep it within a stable range; at the same time, the air flow in the control box 5 is preheated by the plate heater 9, and the condensation water flow rate in the condenser 11 can be adjusted by adjusting the condensation pump 13, so as to adjust the heat exchange rate between the condenser 11 and the air flow flowing through the condenser 11, so as to keep the temperature of the side-blown air stable, improve the tension and the stability of the properties of the finished yarn; in addition, the debugging mechanism adopts a counter-type cooling and dehumidification adjustment method to avoid the situation where the temperature and humidity are too high and cannot be adjusted due to sensor delay.

[0023] like Figure 2 As shown, the width of the air inlet slot 6 gradually increases from top to bottom, and the air control mechanism includes a driving motor 16 fixed on the outer wall of the air control box 5, a driving screw 18 connected to the output end of the driving motor 16, and a blocking slide 17 slidingly fitted on the side wall of the air control box 5, a driving nut 19 is fixed on the blocking slide, and the driving nut 19 is threadedly connected to the driving screw 18, and the blocking slide slides and fits on the outer wall of the air inlet slot 6, and a guide rail 20 parallel to the driving screw 18 is installed on the side wall of the air control box 5, and the blocking slide is slidably installed on the guide rail 20, and the driving motor 16 can drive the blocking slide to slide on the surface of the air control box 5 through the threaded driving screw 18 and the driving nut 19, so as to block and change the connection area of ​​the air inlet slot 6, and adjust the wind speed by changing the air intake volume, so that the wind blown out by the side blowing cooling device can just complete the cooling of the filament bundle without causing filament bundle disturbance.

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A side-blowing cooling device for a polypropylene fiber spinning machine, comprising a device body, characterized in that: The device body includes, from front to back, an air blowing port, a connecting section, an air supply duct, a air blowing fan and an air control box. The side wall of the air control box is provided with an air inlet slot and an air outlet. The width of the air inlet slot gradually increases from top to bottom. The air inlet slot is connected to an air control mechanism, and the air outlet is connected to the air supply duct. The air control mechanism includes a driving motor fixed on the outer wall of the air control box, a driving screw connected to the output end of the driving motor and a blocking slide slidingly fitted on the side wall of the air control box. A driving nut is fixed on the blocking slide, and the driving nut is threadedly connected to the driving screw. The blocking slide slides and fits on the outer wall of the air inlet slot.

2. The side-blowing cooling device for a polypropylene fiber spinning machine according to claim 1, characterized in that: A guide rail parallel to the driving screw is installed on the side wall of the air control box, and the blocking slide is slidably installed on the guide rail.

3. The side-blowing cooling device for a polypropylene fiber spinning machine according to claim 2, characterized in that: A horizontal partition is provided in the air control box, which divides the air control box into two upper and lower air supply spaces. An ultrasonic humidifier is installed in the upper air supply space, and a plate heater is installed in the lower air supply space.

4. The side-blowing cooling device for a polypropylene fiber spinning machine according to claim 3, characterized in that: A debugging mechanism is installed on the inner side of the air outlet, and the debugging mechanism includes a mounting shell, a condenser, a condensate water tank and a condensate pump. An air intake opening is provided at the upper end of the mounting shell, and a guide impeller is installed on the air intake opening. The side wall of the mounting shell is connected to an exhaust pipe, and a connecting flange is provided at the end of the exhaust pipe. The air supply pipe is connected to the connecting flange, the condenser is connected to the condensate water tank, the condenser pump is installed on the condenser, and the condenser passes through the interior of the mounting shell. A drain pipe is provided on the bottom wall of the mounting shell.

5. The side-blowing cooling device for a polypropylene fiber spinning machine according to claim 4, characterized in that: A temperature sensor, a humidity sensor and a wind speed sensor are installed in the air blowing port.

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