A spinning drive system for reducing waste filament emissions

Abstract

The present invention relates to a spinning drive system for reducing waste filament emission, which comprises a motor, a metering pump, a transmission shaft, a PLC controller, a safety pin, a bearing, a stop pin, a brake, an upper flange and a lower flange; the upper flange includes a circular plate I and a vertical pipe I; the circular plate I is provided with a through hole a, a safety pin through hole I and an arc-shaped through hole; the lower flange includes a circular plate II and a vertical pipe II; the circular plate II is provided with a through hole b, a safety pin through hole II and a threaded through hole; an easily breakable section exists on the pin rod of the safety pin; along the rotation direction of the motor, one end of the arc-shaped through hole close to the safety pin through hole I is denoted as end C; the motor and the brake are respectively electrically connected to the PLC controller; the brake is used to stop the rotation of the motor shaft; when the easily breakable section is not broken, the stop pin does not contact end C; when the easily breakable section breaks, the motor sends a signal to the PLC controller. The present invention solves the problem of waste filament emission in the case of the fracture of the safety pin in the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of polyester equipment and relates to a spinning drive system for reducing waste filament discharge. Background Art

[0002] Currently, in the production process of polyester filament, a metering pump is used to meter the spinning melt. After being metered by the metering pump, the melt is extruded through a spinneret plate of a component and a spinning winding device to form polyester filament. The metering accuracy requirement of the metering pump for polyester filament is high, so the equipment cost of the metering pump is also high. Once damaged, it will incur high equipment maintenance costs. Therefore, in the transmission structure between the drive motor and the metering pump, a safety pin is provided between the upper flange and the lower flange.

[0003] As Figures 1 to 2 shown, the prior art spinning drive system includes a motor 1, a metering pump 2, a transmission shaft 3, a safety pin 5, a bearing 6, a brake 8, an upper flange 9 and a lower flange 10. The melt output by the metering pump 2 is extruded through a spinning component 21 to form a filament bundle 22. The safety pin 5 structure has a weak and easily breakable section in the middle part of the pin shaft (between the upper and lower flanges). The metering pump 2 is a gear pump. When there is a foreign object between the two gears, the metering pump 2 will get stuck. If the power is continuously output, the gears of the metering pump 2 will be damaged. Through the design of the easily breakable section of the safety pin 5, when the metering pump gets stuck and the load force exceeds the load of the safety pin, the safety pin breaks, thereby cutting off the power transmission between the upper and lower flanges to protect the gears of the metering pump 2 from damage.

[0004] However, when the power transmission between the upper and lower flanges is cut off, the rotation speed of the metering pump 2 will decrease, making the metering pump 2 unable to rotate synchronously with the motor 1. At this time, the gears of the metering pump 2 rotate passively under the action of the melt pressure in front of the pump. When the rotation speed of the gears of the metering pump 2 before the safety pin 5 breaks is close to the self-rotation speed of the gears of the metering pump 2 after the safety pin 5 breaks, it will cause uneven filament output of the metering pump 2, resulting in uneven fineness of the product. Usually, it can only be found during the quality inspection after the product processing is completed. At this time, the produced filaments will be treated as waste filaments, resulting in a large amount of waste filaments. When the rotation speed of the gears of the metering pump before the safety pin 5 breaks is much greater than the self-rotation speed of the gears of the metering pump 2 after the safety pin 5 breaks, it will cause broken ends. At this time, during the process of the maintenance worker arriving at the scene, troubleshooting and handling the fault, the self-rotation of the metering pump causes a large amount of waste filaments.

[0005] Patent CN 221610159 U discloses a metering pump pin-breaking automatic alarm device, which describes that an alarm occurs after the safety pin breaks to notify the operation and equipment personnel for maintenance in time. However, this patent can only reduce the fault handling time, and the time saved is limited, and it cannot fundamentally solve the problem of waste filament discharge.

[0006] Patent CN 209276692 U discloses a spinning metering pump broken wire slow discharge control system, which detects the breakage of the wire strip through fiber tension, and reduces the discharge of waste wire through the control system by reducing the speed, but it is only applicable to the breakage situation and cannot effectively solve the discharge of waste wire in the case of the safety pin breaking without wire breakage.

[0007] Therefore, it is of great significance to study a spinning drive system for reducing waste wire discharge. Summary of the Invention

[0008] The purpose of the present invention is to solve the problems existing in the prior art and provide a spinning drive system for reducing waste wire discharge.

[0009] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0010] A spinning drive system for reducing waste wire discharge includes a motor, a metering pump, a transmission shaft, a PLC controller, a safety pin, a bearing, a stop pin, a brake, an upper flange and a lower flange;

[0011] The upper flange includes a circular plate I and a vertical pipe I; a through hole a, a safety pin through hole I and an arc-shaped through hole are provided on the circular plate I; the lower end of the vertical pipe I is fixedly connected to the through hole a;

[0012] The lower flange includes a circular plate II and a vertical pipe II; a through hole b, a safety pin through hole II and a threaded through hole are provided on the circular plate II; the upper end of the vertical pipe II is fixedly connected to the through hole b;

[0013] The bearing is arranged in the through hole b of the circular plate II, and the outer ring of the bearing is fixedly connected to the inner wall of the through hole b;

[0014] One end of the transmission shaft is inserted into the vertical pipe II from bottom to top and is fixedly connected to the vertical pipe II, and the other end of the transmission shaft is connected to the metering pump;

[0015] The motor shaft of the motor passes through the vertical pipe I and the through hole a from top to bottom in sequence and is fixedly connected to the inner ring of the bearing; the motor shaft of the motor is fixedly connected to the vertical pipe I;

[0016] There is a gap between the circular plate I and the circular plate II; the pin head of the safety pin is placed on the circular plate I, the pin rod of the safety pin passes through the safety pin through hole I and the safety pin through hole II from top to bottom and is in clearance fit with the safety pin through hole I and the safety pin through hole II respectively; there is an easily breakable section on the pin rod of the safety pin, and the easily breakable section is located between the circular plate I and the circular plate II;

[0017] The stop pin passes through the threaded through hole and the arc-shaped through hole from bottom to top and is threadedly connected to the threaded through hole and in clearance fit with the arc-shaped through hole;

[0018] Along the rotation direction of the motor, the end of the arc-shaped through hole close to the safety pin through hole I is denoted as end C;

[0019] The motor and the brake are electrically connected to the PLC controller respectively; the brake is used to stop the rotation of the motor shaft; when the breakable section is not broken, the stop pin does not contact with end C; when the breakable section is broken, the motor current becomes smaller, changing from the running load state current to the no-load current, the motor sends a signal to the PLC controller, and the PLC controller shuts down the motor and starts the brake, so that the motor shaft no longer rotates. At this time, the transmission shaft, the circular plate II and the stop pin continue to rotate. When the stop pin contacts with end C, the transmission shaft also stops rotating, and the gears in the metering pump also stop rotating, so that no waste filaments are discharged.

[0020] As a preferred technical solution:

[0021] For a spinning drive system for reducing waste filament discharge as described above, the arc length of the arc-shaped through hole is 10% - 60% of the circumference of the circle where it is located.

[0022] For a spinning drive system for reducing waste filament discharge as described above, the safety pin includes a pin head I and a pin rod I; the pin rod I is composed of a cylindrical section I, a breakable section and a cylindrical section II, and the cylindrical section I is connected to the pin head I; wherein, the area of the circumscribed circle of the cross-section of the breakable section < the area of the cross-section of the cylindrical section I; the area of the circumscribed circle of the cross-section of the breakable section < the area of the cross-section of the cylindrical section II.

[0023] For a spinning drive system for reducing waste filament discharge as described above, the stop pin includes a pin head II and a pin rod II; the pin rod II is composed of a threaded section and a non-threaded section; one end of the threaded section is connected to the non-threaded section, and the other end is connected to the pin head II; the length of the threaded section is less than or equal to the thickness of the circular plate II.

[0024] For a spinning drive system for reducing waste filament discharge as described above, the inner diameter of the vertical pipe I is the same as the inner diameter of the through hole a, and the inner diameter of the vertical pipe II is the same as the inner diameter of the through hole b.

[0025] For a spinning drive system for reducing waste filament discharge as described above, along the rotation direction of the motor, one end of the arc-shaped through hole close to the safety pin through hole I is denoted as end C, and the end far from the safety pin through hole I is denoted as end D; when the breakable section is not broken, the peripheral surface of the stop pin contacts with end D. With such a design, the time when the motor current is the no-load current can be prolonged as much as possible, giving the PLC controller enough time to judge whether the safety pin is broken.

[0026] Beneficial effects:

[0027] The spinning drive system for reducing waste filament discharge of the present invention solves the problem of waste filament discharge in the case of the breakage of the safety pin in the prior art, eliminates the need for manual inspection of faults, avoids a large amount of waste filament discharge, and saves resources. Description of the Drawings

[0028] Figure 1 Schematic diagram of a spinning drive system of the prior art;

[0029] Figure 2 is Figure 1 Enlarged schematic diagram of area I in

[0030] Figure 3 Schematic diagram of a safety pin;

[0031] Figure 4 Schematic structural diagram of the spinning drive system of the present invention;

[0032] Figure 5 is Figure 4 Enlarged schematic diagram of area II in

[0033] Figure 6 Bottom view of the lower flange of the present invention;

[0034] Figure 7 Top view of the upper flange of the present invention;

[0035] Figure 8 Schematic diagram of the stop pin of the present invention;

[0036] Figure 9 Top view of area II of the spinning drive system of the present invention. The left figure shows the connection state between the stop pin and the circular arc hole before the safety pin breaks, and the right figure shows the connection state between the stop pin and the circular arc hole after the safety pin breaks;

[0037] Among them, 1 - motor, 2 - metering pump, 3 - transmission shaft, 4 - PLC controller, 5 - safety pin, 6 - bearing, 7 - stop pin, 8 - brake, 9 - upper flange, 10 - lower flange, 11 - through hole a, 12 - safety pin through hole I, 13 - circular arc through hole, 14 - through hole b, 15 - safety pin through hole II, 16 - threaded through hole, 17 - cylindrical section I, 18 - easily broken section, 19 - threaded section, 20 - non - threaded section, 21 - spinning component, 22 - tow. Specific embodiments

[0038] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0039] A spinning drive system for reducing waste tow emission, as Figures 4 to 5 shown, includes a motor 1, a metering pump 2, a transmission shaft 3, a PLC controller 4, a safety pin 5, a bearing 6, a stop pin 7, a brake 8, an upper flange 9 and a lower flange 10;

[0040] The melt output by the metering pump 2 is extruded through the spinning pack 21 to form a tow 22;

[0041] As Figure 7 shown, the upper flange 9 includes a circular plate I and a vertical pipe I; through holes a 11, a safety pin through hole I 12, and an arc-shaped through hole 13 are provided on the circular plate I; the lower end of the vertical pipe I is fixedly connected to the through hole a 11, and the arc length of the arc-shaped through hole 13 is 10% - 60% of the circumference of the circle where it is located; the inner diameter of the vertical pipe I is the same as the inner diameter of the through hole a 11;

[0042] As Figure 6 shown, the lower flange 10 includes a circular plate II and a vertical pipe II; through holes b 14, a safety pin through hole II 15, and a threaded through hole 16 are provided on the circular plate II; the upper end of the vertical pipe II is fixedly connected to the through hole b 14; the inner diameter of the vertical pipe II is the same as the inner diameter of the through hole b 14;

[0043] The bearing 6 is arranged in the through hole b 14 of the circular plate II, and the outer ring of the bearing 6 is fixedly connected to the inner wall of the through hole b 14;

[0044] One end of the transmission shaft 3 is inserted into the vertical pipe II from bottom to top and is fixedly connected to the vertical pipe II, and the other end of the transmission shaft 3 is connected to the metering pump 2;

[0045] The motor shaft of the motor 1 sequentially passes through the vertical pipe I and the through hole a 11 from top to bottom and is fixedly connected to the inner ring of the bearing 6; the motor shaft of the motor is fixedly connected to the vertical pipe I;

[0046] As Figure 3 shown, the safety pin 5 includes a pin head I and a pin rod I; the pin rod I is composed of a cylindrical section I 17, a breakable section 18, and a cylindrical section II, and the cylindrical section I 17 is connected to the pin head I; wherein, the area of the circumscribed circle of the cross-section of the breakable section 18 < the area of the cross-section of the cylindrical section I 17; the area of the circumscribed circle of the cross-section of the breakable section < the area of the cross-section of the cylindrical section II;

[0047] There is a gap between the circular plate I and the circular plate II; the pin head I of the safety pin 5 is placed on the circular plate I, the pin rod I of the safety pin 5 passes through the safety pin through hole I 12 and the safety pin through hole II 15 from top to bottom, and has a clearance fit with the safety pin through hole I 12 and the safety pin through hole II 15 respectively; the breakable section is located between the circular plate I and the circular plate II;

[0048] As Figure 8As shown, the stop pin 7 includes a pin head II and a pin rod II; the pin rod II consists of a threaded section 19 and a non-threaded section 20; one end of the threaded section 19 is connected to the non-threaded section 20, and the other end is connected to the pin head II; the length of the threaded section 19 is less than or equal to the thickness of the circular plate II; the stop pin 7 passes through the threaded through-hole and the arc-shaped through-hole from bottom to top, and is threadedly connected to the threaded through-hole 16 and has a clearance fit with the arc-shaped through-hole 13.

[0049] As Figure 9 shown, along the rotation direction of the motor 1, one end of the arc-shaped through-hole 13 close to the safety pin through-hole I 12 is denoted as end C, and the end far from the safety pin through-hole I 12 is denoted as end D; when the breakable section 18 is not broken, the peripheral surface of the stop pin 7 contacts end D and does not contact end C.

[0050] The motor 1 and the brake 8 are electrically connected to the PLC controller 4 respectively; the brake 8 is used to stop the rotation of the motor shaft of the motor 1; when the breakable section 18 breaks, the motor 1 sends a signal to the PLC controller 4, and the PLC controller 4 shuts down the motor 1 and starts the brake 8.

[0051] Specific usage process: When the breakable section 18 is not broken, the stop pin 7 does not contact end C; when the breakable section breaks, the current of the motor 1 becomes smaller, changing from the running load current of the motor 1 to the no-load current. The motor 1 sends a signal to the PLC controller 4, and the PLC controller 4 shuts down the motor 1 and starts the brake 8, so that the motor shaft of the motor 1 no longer rotates. At this time, the transmission shaft 3, the circular plate II, and the stop pin 7 continue to rotate. When the stop pin 7 contacts end C, the transmission shaft 3 also stops rotating, and the gears in the metering pump 2 also stop rotating, so that no waste wire is discharged.

Claims

1. A spinning drive system for reducing waste filament discharge, characterized in that, It includes a motor, a metering pump, a transmission shaft, a PLC controller, a safety pin, bearings, a stop pin, a brake, an upper flange and a lower flange; The upper flange includes a circular plate I and a vertical pipe I; through hole a, safety pin through hole I and an arc-shaped through hole are provided on the circular plate I; the lower end of the vertical pipe I is fixedly connected to the through hole a; The lower flange includes a circular plate II and a vertical pipe II; through hole b, safety pin through hole II and a threaded through hole are provided on the circular plate II; the upper end of the vertical pipe II is fixedly connected to the through hole b; The bearing is arranged in the through hole b, and the outer ring of the bearing is fixedly connected to the inner wall of the through hole b; One end of the transmission shaft is inserted into the vertical pipe II from bottom to top and is fixedly connected to the vertical pipe II, and the other end of the transmission shaft is connected to the metering pump; The motor shaft of the motor passes through the vertical pipe I and the through hole a from top to bottom in sequence and is fixedly connected to the inner ring of the bearing; the motor shaft of the motor is fixedly connected to the vertical pipe I; There is a gap between the circular plate I and the circular plate II; the pin head of the safety pin is placed on the circular plate I, the pin rod of the safety pin passes through the safety pin through hole I and the safety pin through hole II from top to bottom and has a clearance fit with the safety pin through hole I and the safety pin through hole II respectively; there is a breakable section on the pin rod of the safety pin, and the breakable section is located between the circular plate I and the circular plate II; The stop pin passes through the threaded through hole and the arc-shaped through hole from bottom to top and is threadedly connected to the threaded through hole and has a clearance fit with the arc-shaped through hole; Along the rotation direction of the motor, the end of the arc-shaped through hole close to the safety pin through hole I is denoted as end C; The motor and the brake are respectively electrically connected to the PLC controller; the brake is used to stop the rotation of the motor shaft; when the breakable section is not broken, the stop pin does not contact end C; when the breakable section is broken, the motor sends a signal to the PLC controller, and the PLC controller shuts down the motor and starts the brake.

2. The spinning drive system for reducing waste silk emission according to claim 1, wherein The arc length of the arc-shaped through hole is 10% - 60% of the circumference of the circle where it is located.

3. A spinning drive system for reducing waste filament discharge according to claim 1, characterized in that, The safety pin includes a pin head I and a pin rod I; the pin rod I is composed of a cylindrical section I, a breakable section and a cylindrical section II, and the cylindrical section I is connected to the pin head I; wherein, the area of the circumscribed circle of the cross-section of the breakable section < the area of the cross-section of the cylindrical section I; the area of the circumscribed circle of the cross-section of the breakable section < the area of the cross-section of the cylindrical section II.

4. A spinning drive system for reducing waste filament discharge according to claim 1, characterized in that, The stop pin includes a pin head II and a pin rod II; the pin rod II is composed of a threaded section and a non-threaded section; one end of the threaded section is connected to the non-threaded section, and the other end is connected to the pin head II; the length of the threaded section is less than or equal to the thickness of the circular plate II.

5. A spinning drive system for reducing waste filament emission according to claim 1, characterized in that, The inner diameter of the vertical pipe I is the same as the inner diameter of the through hole a, and the inner diameter of the vertical pipe II is the same as the inner diameter of the through hole b.

6. The spinning drive system for reducing waste filament discharge according to claim 1, characterized in that, Along the rotation direction of the motor, the end of the arc-shaped through hole close to the safety pin through hole I is denoted as end C, and the end far from the safety pin through hole I is denoted as end D; when the breakable section is not broken, the peripheral surface of the stop pin contacts end D.

Images