Collective doffing control system and control method of ring spinning frame

Abstract

The invention particularly relates to a collective doffing control system and method of a ring spinning frame, the control system comprises a collective doffing element, a host element, a ring rail control system and a human-computer interface, the host element receives a signal sent by the collective doffing element and sends a control signal to the collective doffing element, the human-computer interface receives signals sent by the host element and the collective doffing element, and controls the host element, the collective doffing element and the ring plate frequency converter through the human-computer interface; the collective doffing element mainly comprises a collective doffing switching power supply and a collective doffing PLC. The collective doffing switching power supply provides electric energy for the whole collective doffing element and the ring rail frequency converter. The host element mainly comprises a host switching power supply for providing electric energy for the whole host element and a host PLC (Programmable Logic Controller); the host PLC is in communication connection with the human-computer interface and the collective doffing PLC; the spinning machine can be prevented from being shut down due to operation errors of workers, and meanwhile the modification cost is reduced.

Description

Technical Field

[0001] The invention belongs to the field of ring spinning frames, and in particular relates to a collective doffing control system and a control method for a ring spinning frame. Background Art

[0002] At present, there are a large number of ring spinning machines that are not equipped with collective doffing devices. When these devices doff, workers need to manually pull out the yarn, which increases the labor intensity of the workers and reduces production efficiency and economic benefits. At the same time, due to the large number of ring spinning machines that are not equipped with collective doffing devices, the cost of modifying these devices is high, and the human-machine interface style of the control system in the ring spinning machine after the modification is quite different from that before the modification, resulting in the operator being unable to master the operation method of the collective doffing device proficiently, and the ring spinning machine is prone to malfunction and shutdown due to operating errors. Summary of the invention

[0003] The object of the present invention is to provide a collective doffing control system and control method for a ring spinning frame, which can avoid the failure and shutdown of the spinning frame caused by operating errors of the staff and reduce the transformation cost.

[0004] The technical solution of the present invention is: a collective doffing control system for a ring spinning frame, comprising: a collective doffing element, a host element, a steel ring plate control system and a human-machine interface, wherein the steel ring plate control system mainly comprises a steel ring plate inverter for controlling the operation of the steel ring plate in the spinning frame, the host element receives a signal sent by the collective doffing element, and sends a control signal to the collective doffing element, the human-machine interface receives signals sent by the host element and the collective doffing element, and controls the host element, the collective doffing element and the steel ring plate inverter through the human-machine interface;

[0005] The collective doffing element includes a servo motor and a plurality of solenoid valves required for the ring spinning frame to complete the collective doffing action, wherein the plurality of solenoid valves are used to respectively control the turning of the yarn guide plate, the inward and outward swing of the herringbone arm, and the inflation and deflation of the tube grabber, and the servo motor drives the collective doffing device to drive the spinning bobbin to move up and down; the collective doffing element also includes:

[0006] The collective doffing switch power supply is connected to the control terminal of the steel collar plate inverter. The collective doffing switch power supply converts the input 220V AC into 24V and provides power for the entire collective doffing element. At the same time, the collective doffing switch power supply provides power for the steel collar plate inverter through the 24V control terminal of the steel collar plate inverter.

[0007] The collective doffing PLC is connected to the host components through RS485. The collective doffing PLC is connected to multiple solenoid valves and servo motors. At the same time, the collective doffing PLC is also connected to the empty tube lifting motor and the full yarn lifting motor. The collective doffing PLC controls multiple solenoid valves and servo motors to complete the ring spinning frame's collection action. The collective doffing PLC controls the full yarn lifting motor to remove the full yarn spinning bobbin from the spinning frame, and the collective doffing PLC controls the empty tube lifting motor to place the empty spinning bobbin on the spinning frame;

[0008] The host component includes a spinning frame main shaft motor, a main shaft brake device, a cotton suction fan and a cleaner motor required for the ring spinning frame to complete the spinning operation. The spinning frame main shaft is driven by the spinning frame main shaft motor to make the spinning frame spin. The spinning frame main shaft is braked by the main shaft brake device to stop the spinning frame. During the spinning process of the spinning frame, the cotton suction fan provides negative pressure for the yarn, and the cleaner motor cleans the spinning frame. The host component also includes:

[0009] The host switching power supply provides power to the entire host components;

[0010] The host PLC is connected to the human-machine interface and the collective doffing PLC through RS485. The host PLC is connected to the spinning frame spindle motor, spindle brake device, cotton suction fan and cleaner motor required for the ring spinning frame to complete the spinning operation. The host PLC controls the ring spinning frame spindle motor, spindle brake device, cotton suction fan and cleaner motor required for the spinning operation. The host PLC receives the signal sent by the collective doffing PLC and sends the signal to the human-machine interface. The parameters set in the human-machine interface are distinguished by different PLC communication numbers, and different parameter information is sent to the host PLC and the collective doffing PLC respectively.

[0011] The steel collar plate frequency converter is connected to the human-machine interface via RS485, the information of the steel collar plate frequency converter is displayed on the human-machine interface, and parameters are set on the human-machine interface to control the operation of the steel collar plate frequency converter. The steel collar plate control system also includes a steel collar plate motor and a steel collar plate motor brake device. The steel collar plate motor is controlled by the steel collar plate frequency converter, the steel collar plate motor drives the steel collar plate to move up and down, and the steel collar plate motor brakes the steel collar plate motor through the steel collar plate motor brake device to stop the movement of the steel collar plate.

[0012] Furthermore, a collective doffing transformer is provided on the collective doffing switch power supply, and the collective doffing transformer converts 380V AC power into 220V AC power and outputs it to the collective doffing switch power supply.

[0013] Furthermore, the collective yarn dropping element also includes a collective yarn dropping servo driver, a collective yarn dropping circuit breaker, a collective yarn dropping contactor and a solid-state relay controlled by a collective yarn dropping PLC, the collective yarn dropping servo driver is connected to the servo motor, and the operation and stop of the servo motor are controlled by the collective yarn dropping servo driver; the collective yarn dropping circuit breaker includes a three-phase circuit breaker, a two-phase circuit breaker and a single-phase circuit breaker, wherein the servo motor, the empty tube lifting motor and the full yarn lifting motor are all connected with a three-phase circuit breaker, and multiple three-phase circuit breakers are connected according to power and current specifications The servo motor, the empty tube lifting motor and the full yarn lifting motor are respectively protected by circuits; the two-phase circuit breaker is connected to the collective yarn dropping transformer, and the collective yarn dropping transformer is protected by the two-phase circuit breaker; the collective yarn dropping switch power supply is protected by the single-phase circuit breaker; the servo motor and the full yarn lifting motor are both provided with the collective yarn dropping contactor, and the plurality of collective yarn dropping contactors respectively control the power on and off of the servo motor and the full yarn lifting motor; the solid-state relay is connected to the empty tube lifting motor, and the empty tube lifting motor is controlled to be powered on and off by the solid-state relay.

[0014] Furthermore, a host transformer is provided on the host switching power supply, and the host transformer converts 380V AC power into 220V AC power and outputs it to the host switching power supply.

[0015] Furthermore, the host components also include a host three-phase circuit breaker, a host two-phase circuit breaker, a host single-phase circuit breaker, a bridge rectifier stack and a host contactor controlled by a host PLC. The cotton suction fan and the cleaner motor are both connected to the host three-phase circuit breaker, and multiple host three-phase circuit breakers respectively protect the cotton suction fan and the cleaner motor. The host two-phase circuit breaker is connected to the host transformer, the host two-phase circuit breaker protects the host transformer, and the host single-phase circuit breaker protects the host switching power supply; the bridge rectifier stack is connected to the spindle brake device, and the spindle brake device is powered by the bridge rectifier stack; the cotton suction fan, the cleaner motor, the spindle brake device and the steel collar plate brake device are all connected to the host contactor, and multiple host contactors respectively control the power on and off of the cotton suction fan, the cleaner motor, the spindle brake device and the steel collar plate motor brake device.

[0016] A collective doffing control method for a ring spinning frame is applicable to the collective doffing control system of the ring spinning frame mentioned above. The control method is:

[0017] S1: Turn on the host switch power supply and the collective doffing switch power supply. The host switch power supply provides power for the host components, and the collective doffing switch power supply provides power for the collective doffing components and the collar plate inverter. At the same time, set different parameters on the human-machine interface. These parameters are distinguished by different PLC communication numbers, and these different parameter information are sent to the host PLC, collective doffing PLC and collar plate inverter respectively.

[0018] S2: After receiving the signal, the host PLC controls the cotton suction fan to start running, and then controls the spinning frame main shaft motor to start running. The spinning frame main shaft motor drives the spinning frame main shaft to run, so that the spinning frame starts spinning. In this process, the cotton suction fan provides negative pressure to the yarn;

[0019] S3: The host PLC sends the signal of the spinning frame main shaft operation to the human-machine interface for display. The human-machine interface sends the signal to the steel ring plate inverter, and sends the parameters of the full yarn position, lower limit and the upward and downward movement speed of the steel ring plate set on the human-machine interface to the steel ring plate inverter. After receiving the signal, the steel ring plate inverter controls the steel ring plate motor to drive the steel ring plate to gradually move upward. At the same time, the steel ring plate inverter sends the signal to the human-machine interface for display;

[0020] S4: When the collar plate inverter controls the collar plate motor to drive the collar plate to move up to the highest full yarn position, the collar plate inverter quickly lowers the collar plate to the lower limit position through the collar plate motor. When the collar plate motor drives the collar plate to move to the lower limit position, the host PLC controls the collar plate brake device to brake the collar plate motor to stop the collar plate from moving. The collar plate inverter sends a signal to the host PLC through the human-machine interface to stop the collar plate from moving. After receiving the signal, the host PLC controls the spindle brake device to brake the spindle of the spinning frame to stop spinning. Then, the host PLC controls the cotton suction fan to stop running, and the host components and the collar plate control system stop running. The host PLC sends a signal to stop the host components to the collective doffing PLC and the human-machine interface.

[0021] S5: After receiving the spindle stop signal sent by the host PLC, the collective doffing PLC controls the solenoid valve to flip up the yarn guide plate. The collective doffing PLC controls the servo motor to drive the collective doffing device to move up and down through the collective doffing servo driver. At the same time, the collective doffing PLC controls the inward and outward swing of the herringbone arm and the inflation and deflation of the tube grabber through multiple solenoid valves. Through the joint action of the collective doffing device, the herringbone arm and the tube grabber, the fully spun spinning bobbin is removed and placed on the convex plate under the spinning frame, and then the empty spinning bobbin is moved upward from the bottom of the spinning frame to be inserted into each spindle. After that, the collective doffing PLC controls the solenoid valve to drop the yarn guide plate. During this process, the collective doffing PLC sends a signal to the human-machine interface for display;

[0022] S6: The collective yarn dropping PLC sends the signal of the yarn guide plate falling to the host PLC. After receiving the signal, the host PLC controls the cotton suction fan and the spinning frame main shaft motor to run. The spinning frame main shaft motor drives the spinning frame main shaft to start running, ensuring that the spinning frame performs automatic spinning. While the spinning frame main shaft is running, the host PLC sends the signal to the steel collar plate inverter through the human-machine interface. The steel collar plate inverter controls the steel collar plate motor to run, so that the steel collar plate motor drives the steel collar plate to gradually move up; while the spinning frame is spinning, the collective yarn dropping PLC controls the full yarn lifting motor set at the tail of the spinning machine to remove the full spinning tube from the convex plate below the spinning machine, and place the spinning tube outside the spinning machine, and control the empty tube lifting motor at the tail of the spinning machine to put the empty spinning tube back on the top of the convex plate to prepare for the next collective yarn dropping of the spinning machine.

[0023] Further, in step S1, the input voltage of the external power supply is converted into the voltage output required by the host switching power supply through the host transformer, the host switching power supply converts the voltage output by the host transformer into the voltage output required by the host components, the host PLC controls the power supply of the cotton suction fan, the cleaner motor, the spindle brake device and the collar plate motor brake device through multiple host contactors, and the host PLC supplies power to the spindle brake device through the bridge rectifier stack; in this process, the host transformer is protected by the host two-phase circuit breaker, the host switching power supply is protected by the single-phase circuit breaker, and the cotton suction fan and the cleaner motor are protected by multiple host three-phase circuit breakers.

[0024] The input voltage of the external power supply is converted into the voltage output required by the collective doffing switching power supply through the collective doffing transformer, and the collective doffing switching power supply converts the output voltage of the collective doffing transformer into the voltage output required by the collective doffing element. The collective doffing PLC controls the servo motor and the full yarn lifting motor to be powered on respectively through multiple collective doffing contactors, and the collective doffing PLC controls the empty tube lifting motor to be powered on through the solid-state relay. In this process, the collective doffing transformer is protected by a two-phase circuit breaker, the collective doffing switching power supply is protected by a single-phase circuit breaker, and the servo motor, the empty tube lifting motor and the full yarn lifting motor are protected by multiple three-phase circuit breakers.

[0025] Further, in step S4, after the host PLC controls the cotton suction fan to stop running through the host contactor, the host PLC controls the cleaner motor, the spindle brake device and the steel collar plate motor brake device to cut off the power through multiple host contactors, so that the cleaner motor, the spindle brake device and the steel collar plate motor brake device stop running. At the same time, the host PLC sends a stop signal to the steel collar plate frequency converter through the human-machine interface, and the steel collar plate frequency converter controls the steel collar plate motor to stop running.

[0026] Further, in step S5, the signal transmission between the host PLC and the collective yarn doffing PLC includes: when the spinning frame performs collective yarn doffing, the host PLC sends a signal to the collective yarn doffing PLC, the collective yarn doffing PLC controls the collective yarn doffing element to start running, and the collective yarn doffing device of the collective yarn doffing element is at the moment of pulling out the spinning bobbin full of yarn, the collective yarn doffing PLC sends a signal to the host PLC, the host PLC controls the spindle brake device to brake the spinning frame main shaft through the bridge rectifier stack and the host contactor, and the host PLC controls the spinning frame main shaft to brake to prevent the spindle from reversing when the yarn is full; after the host PLC receives the signal sent by the collective yarn doffing PLC that the yarn guide plate has fallen, the host PLC controls the spindle brake device to release the restriction on the spinning frame main shaft, so that the spinning frame starts the next yarn drop, and at the same time, the host PLC sends a signal to the collective yarn doffing PLC during the spinning process, and the collective yarn doffing PLC controls the solenoid valve to put the yarn guide plate in a falling state.

[0027] Further, in step S5, the collective doffing PLC sends the alarm information of the collective doffing element in the collective doffing process of the ring spinning frame to the host PLC, and the host PLC sends the alarm information to the human-machine interface for display.

[0028] The beneficial effects of the present invention are as follows: different parameters are set through the human-machine interface, and these different parameter information are distinguished by different PLC communication station numbers, and different parameter information is sent to the host component and the collective yarn dropping component respectively, thereby realizing a control method for effectively utilizing the original human-machine interface and host components of the ring spinning frame equipment to complete the collective yarn dropping transformation, greatly reducing the transformation cost, adding a steel collar plate inverter to drive the steel collar plate motor, realizing the variable frequency speed regulation function of the steel collar plate, and retaining the original control and display style of the human-machine interface to the greatest extent, so that the staff can operate the modified ring spinning frame conveniently and quickly, avoiding the ring spinning frame failure and shutdown due to operating errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 It is a schematic diagram of the framework of the collective doffing control system of the present invention;

[0031] Figure 2 It is a schematic diagram of the framework of the collective doffing element of the present invention;

[0032] Figure 3It is a schematic diagram of the framework of the host component of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in addition, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Since there are a large number of ring spinning frames that are not equipped with collective doffing devices, the cost of modifying these devices is high, and the human-machine interface style of the control system in the ring spinning frame after the modification is quite different from that before the modification, resulting in the operator being unable to master the operation method of the collective doffing device proficiently, and the ring spinning frame is prone to malfunction and shutdown due to operating errors. In view of this, the inventor of the present application provides a collective doffing control system and control method for a ring spinning frame, which effectively utilizes the original human-machine interface and host components of the ring spinning frame equipment and adds the control components required for collective doffing, greatly reducing the modification cost. At the same time, the original human-machine interface display style is not changed, and the operator can quickly and accurately operate the modified ring spinning frame.

[0036] like Figure 1As shown, a collective doffing control system for a ring spinning frame includes: a collective doffing element 2, a host element 1, a steel ring plate control system 3 and a human-machine interface 4. The steel ring plate control system 3 mainly includes a steel ring plate inverter 303 for controlling the operation of the steel ring plate in the spinning frame. The host element 1 receives the signal sent by the collective doffing element 2 and sends a control signal to the collective doffing element 2. The human-machine interface 4 receives the signal sent by the host element 1 and the collective doffing element 2, and controls the host element 1, the collective doffing element 2 and the steel ring plate inverter 303 through the human-machine interface 4.

[0037] Among them, the steel collar plate inverter 303 is connected to the human-machine interface 4 through RS485, the information of the steel collar plate inverter 303 is displayed on the human-machine interface 4, and parameters are set on the human-machine interface 4 to control the operation of the steel collar plate inverter 303. The steel collar plate control system 3 also includes a steel collar plate motor 301 and a steel collar plate motor brake device 302. The steel collar plate motor 301 is controlled by the steel collar plate inverter 303. The steel collar plate motor 301 drives the steel collar plate to move up and down. During the spinning process, the steel collar plate is gradually moved up to ensure that the yarn is evenly wound on the spinning bobbin. The steel collar plate motor brake 301 is braked by the steel collar plate motor brake device 302 to stop the steel collar plate from moving.

[0038] Based on the above embodiment, the parameters set by the human-machine interface 4 are distinguished by the different PLC communication station numbers, and different parameter information is sent to the host component 1 and the collective yarn dropping component 2 respectively, so as to realize the control method of effectively utilizing the original human-machine interface 4 and the host component 1 of the ring spinning frame equipment to complete the collective yarn dropping transformation, which greatly reduces the transformation cost, and adds a steel collar plate inverter 303 to drive the steel collar plate motor 301, so as to realize the variable frequency speed regulation function of the steel collar plate, and retain the original control and display style of the human-machine interface 4 to the greatest extent, so that the staff can operate the modified ring spinning frame conveniently and quickly.

[0039] In this embodiment, if Figure 2 As shown, the collective yarn doffing element 2 includes a servo motor 204 and a plurality of solenoid valves 203 required for the ring spinning frame to complete the collective yarn doffing action, wherein the plurality of solenoid valves 203 respectively control the flipping of the yarn guide plate, the inward and outward swinging of the herringbone arm, and the inflation and deflation of the tube grabber, and the servo motor 204 drives the collective yarn doffing device to move the spinning bobbin up and down; the collective yarn doffing element also includes: a collective yarn doffing switch power supply 201 and a collective yarn doffing PLC 202.

[0040] The collective doffing switch power supply 201 is connected to the control terminal of the collar plate inverter 303. The collective doffing switch power supply 201 converts the input 220V AC power into 24V and provides power for the entire collective doffing element 2. At the same time, the collective doffing switch power supply 201 provides power for the collar plate inverter 303 through the 24V control terminal of the collar plate inverter 303. The collective doffing switch power supply 202 is provided with a collective doffing transformer 207. The collective doffing transformer 207 converts 380V AC power into 220V AC power and outputs it to the collective doffing switch power supply 202. The collective doffing PLC 202 It is connected to the host component 1 through RS485, and the collective yarn dropping PLC202 is connected to multiple solenoid valves 203 and a servo motor 204. At the same time, the collective yarn dropping PLC202 is also connected to an empty tube lifting motor 205 and a full yarn lifting motor 206. The collective yarn dropping PLC202 controls the servo motor 204 and multiple solenoid valves 203 to complete the gathering action of the ring spinning frame, and the full yarn lifting motor 206 is controlled by the collective yarn dropping PLC202 to remove the full yarn spinning bobbin from the spinning frame, and the empty yarn bobbin is placed on the spinning frame by controlling the empty tube lifting motor 205 through the collective yarn dropping PLC202.

[0041] Specifically, the collective yarn dropping element 2 also includes a collective yarn dropping servo driver 208, a collective yarn dropping circuit breaker 209, a collective yarn dropping contactor 210 and a solid-state relay 211 controlled by the collective yarn dropping PLC 202. The collective yarn dropping servo driver 208 is connected to the servo motor 204, and the operation and stop of the servo motor 204 are controlled by the collective yarn dropping servo driver 208; the collective yarn dropping circuit breaker 209 includes a three-phase circuit breaker 209-1, a two-phase circuit breaker 209-2 and a single-phase circuit breaker 209-3, wherein the servo motor 204, the empty tube lifting motor 205 and the full yarn lifting motor 206 are all connected with a three-phase circuit breaker 209-1, and multiple three-phase circuit breakers 209-1 are divided into The servo motor 204, the empty tube lifting motor 205 and the full yarn lifting motor 206 are respectively protected by circuit protection. The two-phase circuit breaker 209-2 is connected to the collective yarn dropping transformer 207, and the collective yarn dropping transformer 207 is protected by the two-phase circuit breaker 209-2. The single-phase circuit breaker 209-3 protects the collective yarn dropping switch power supply 201. The servo motor 204 and the full yarn lifting motor 206 are both provided with a collective yarn dropping contactor 210, and a plurality of collective yarn dropping contactors 210 respectively control the power on and off of the servo motor 204 and the full yarn lifting motor 206. The solid-state relay 211 is connected to the empty tube lifting motor 205, and the empty tube lifting motor 205 is controlled to be powered on and off by the solid-state relay 211.

[0042] Based on the above embodiment, the solenoid valve 203, servo motor 204, empty tube lifting motor 205 and full yarn lifting motor 206 required for the ring spinning frame to complete the collective yarn dropping action are fully controlled through the collective yarn dropping PLC 202 to ensure that the ring spinning frame can automatically perform the collective yarn dropping process. Among them, the collective yarn dropping device that drives the spinning tube to move up and down, the herringbone arm that drives the spinning tube to swing in and out, and the tube grabber that grabs the spinning tube by filling and releasing air are all commonly used equipment in the ring spinning frame in the prior art and are not described in detail in the present invention.

[0043] In this embodiment, if Figure 3 As shown, the host component 1 includes a spinning frame main shaft motor 103, a main shaft brake device 104, a cotton suction fan 105 and a cleaner motor 106 required for the ring spinning frame to complete the spinning operation. The spinning frame main shaft is driven by the spinning frame main shaft motor 103 to make the spinning frame spin. The spinning frame main shaft is braked by the main shaft brake device 104 to stop the spinning frame from spinning. During the spinning process of the spinning frame, the cotton suction fan 105 provides negative pressure for the yarn, and the cleaner motor 106 cleans the spinning frame. The host component 1 also includes: a host switch power supply 101 and a host PLC 102;

[0044] Among them, the host switching power supply 101 provides power for the entire host element 1. The host switching power supply 101 is provided with a host transformer 107. The host transformer 107 converts 380V AC power into 220V AC power and outputs it to the host switching power supply 101; the host PLC 102 is connected to the human-machine interface 4 and the collective yarn dropping PLC 202 through RS485. The host PLC 102 is connected to the ring spinning frame spindle motor 103, spindle brake device 104, cotton suction fan 105 and other components required for the spinning operation to be completed by the ring spinning frame. and cleaner motor 106, and the main engine PLC 102 controls the ring spinning frame spindle motor 103, spindle brake device 104, cotton suction fan 105 and cleaner motor 106 required for the spinning operation, and the main engine PLC 102 receives the signal sent by the collective doffing PLC 202, and sends the signal to the human-machine interface 4, and the parameters set in the human-machine interface 4 are distinguished by the different PLC communication numbers, and different parameter information is sent to the main engine PLC 102 and the collective doffing PLC 202 respectively;

[0045] Specifically, the host component 1 also includes a host three-phase circuit breaker 108, a host two-phase circuit breaker 109, a host single-phase circuit breaker 110, a bridge rectifier stack 111 and a host contactor 112 controlled by the host PLC 102. The cotton suction fan 105 and the cleaner motor 106 are both connected to the host three-phase circuit breaker 108. The plurality of host three-phase circuit breakers 108 protect the cotton suction fan 105 and the cleaner motor 106 respectively. The host two-phase circuit breaker 109 is connected to the host transformer 107. The host two-phase circuit breaker 109 protects the host transformer 107. Protection, the main engine single-phase circuit breaker 110 protects the main engine switch power supply 101; the bridge rectifier stack 111 is connected to the spindle brake device 104, and the spindle brake device 104 is powered by the bridge rectifier stack 111; the cotton suction fan 105, the cleaner motor 106, the spindle brake device 104 and the steel collar plate brake device 302 are all connected with the main engine contactor 112, and the multiple main engine contactors 112 respectively control the power on and off of the cotton suction fan 105, the cleaner motor 106, the spindle brake device 104 and the steel collar plate motor brake device 302.

[0046] Based on the described embodiment, the host PLC102 is the core control component for the operation of the host components. In order to facilitate the staff to quickly adapt to the collective yarn dropping modification of the spinning frame, the host PLC102 still uses the motion control and production statistics programs in the prior art, and only makes necessary program modifications to send and receive relevant signals of the collective yarn dropping PLC202.

[0047] like Figure 1-3 As shown, a collective doffing control method for a ring spinning frame is applicable to the collective doffing control system of the ring spinning frame mentioned above. The control method is:

[0048] S1: Turn on the host switch power supply 101 and the collective doffing switch power supply 201, the host switch power supply 101 provides power to the host element 1, wherein the input voltage of the external power supply is converted into the voltage output required by the host switch power supply 101 through the host transformer 107, and the host switch power supply 101 converts the voltage output by the host transformer into the voltage output required by the host element 1, and the host PLC 102 controls the cotton suction fan 105, the cleaner motor 106, the spindle brake device 104 and the collar plate motor brake device 302 to be energized through multiple host contactors 112, and the host PLC 102 supplies power to the spindle brake device 104 through the bridge rectifier stack 111; in this process, the host transformer 107 is protected by the host two-phase circuit breaker 109, the host switch power supply 101 is protected by the single-phase circuit breaker 110, and the cotton suction fan 105 and the cleaner motor 106 are protected by multiple host three-phase circuit breakers 108;

[0049] The collective doffing switch power supply 201 provides electric energy for the collective doffing element 2 and the collar plate frequency converter 303, wherein the input voltage of the external power supply is converted into the voltage output required by the collective doffing switch power supply 201 through the collective doffing transformer 207, and the collective doffing switch power supply 201 converts the voltage output by the collective doffing transformer 207 into the voltage output required by the collective doffing element 2, and the collective doffing PLC 202 controls the servo motor 204 and the full yarn lifting motor 206 to be powered on respectively through a plurality of collective doffing contactors 210, and the collective doffing PLC 202 controls the empty tube lifting motor 205 to be powered on through the solid-state relay 211; in this process, the collective doffing transformer 207 is protected by the two-phase circuit breaker 209-2, the collective doffing switch power supply 201 is protected by the single-phase circuit breaker 209-3, and the servo motor 204, the empty tube lifting motor 205 and the full yarn lifting motor 206 are circuit-protected by a plurality of three-phase circuit breakers 209-1;

[0050] At the same time, different parameters are set on the human-machine interface 4, and these parameters are distinguished by different PLC communication numbers, and these different parameter information are sent to the host PLC 102, the collective doffing PLC 202 and the ring plate inverter 303 respectively;

[0051] S2: After receiving the signal, the host PLC102 controls the cotton suction fan 105 to start running, and then controls the spinning frame main shaft motor 103 to start running through the host PLC202. The spinning frame main shaft motor 103 drives the spinning frame main shaft to run, so that the spinning frame starts spinning. In this process, the cotton suction fan 105 provides negative pressure to the yarn;

[0052] S3: The host PLC102 sends the signal of the spinning frame main shaft operation to the human-machine interface 4 for display, and the human-machine interface 4 sends the signal to the steel ring plate inverter 303, and sends the parameters of the full yarn position, the lower limit position and the upward and downward movement speed of the steel ring plate set on the human-machine interface 4 to the steel ring plate inverter 303. After receiving the signal, the steel ring plate inverter 303 controls the steel ring plate motor 301 to drive the steel ring plate to gradually move upward, and at the same time, the steel ring plate inverter 303 sends the signal to the human-machine interface 4 for display;

[0053] S4: When the collar plate inverter 303 controls the collar plate motor 301 to drive the collar plate to move up to the highest full yarn position, the collar plate inverter 303 quickly lowers the collar plate to the lower limit position through the collar plate motor 301. When the collar plate motor 301 drives the collar plate to move to the lower limit position, the host PLC202 controls the collar plate brake device 302 to brake the collar plate motor 301 to stop the collar plate from moving. The collar plate inverter 303 sends a signal of the collar plate stopping movement to the host PLC102 through the human-machine interface 4. After receiving the signal, the host PLC102 controls the spindle brake device 104 to brake the spindle of the spinning frame to stop spinning. Then, the host PLC102 controls the cotton suction fan 105 to stop running, the host component 1 and the collar plate control system 3 stop running, and the host PLC102 sends a signal of the host component 1 stopping running to the collective doffing PLC202 and the human-machine interface 4.

[0054] During this process, when the host PLC102 controls the cotton suction fan 105 to stop running through the host contactor 112, the host PLC102 controls the cleaner motor 106, the spindle brake device 104 and the steel collar plate motor brake device 302 to cut off power through multiple host contactors 112, so that the cleaner motor 106, the spindle brake device 104 and the steel collar plate motor brake device 302 stop running. At the same time, the host PLC102 sends a stop signal to the steel collar plate frequency converter 303 through the human-machine interface 4, and the steel collar plate frequency converter 303 controls the steel collar plate motor 301 to stop running.

[0055] S5: After receiving the spindle stop signal sent by the host PLC102, the collective yarn doffing PLC202 controls the solenoid valve 203 to flip up the yarn guide plate. The collective yarn doffing PLC202 controls the servo motor 204 to drive the collective yarn doffing device to move up and down through the collective yarn doffing servo driver 208. At the same time, the collective yarn doffing PLC202 controls the inward and outward swing of the herringbone arm and the inflation and deflation of the tube grabber through multiple solenoid valves 203. Through the joint action of the collective yarn doffing device, the herringbone arm and the tube grabber, the fully spun spinning tube is removed and placed on the convex plate under the spinning frame, and then the empty spinning tube is moved upward from the bottom of the spinning frame to be inserted into each spindle. After that, the collective yarn doffing PLC202 controls the solenoid valve 203 to drop the yarn guide plate. During this process, the collective yarn doffing PLC202 sends a signal to the human-machine interface 4 for display;

[0056] Among them, the signal transmission between the host PLC102 and the collective yarn dropping PLC202 includes: when the spinning frame performs collective yarn dropping, the host PLC102 sends a signal to the collective yarn dropping PLC202, the collective yarn dropping PLC202 controls the collective yarn dropping element 2 to start running, and the collective yarn dropping device of the collective yarn dropping element 2 is at the moment of pulling out the spinning bobbin full of yarn. The collective yarn dropping PLC202 sends a signal to the host PLC102, and the host PLC102 controls the spindle brake device 104 to brake the main shaft of the spinning frame through the bridge rectifier stack 111 and the host contactor 112. The host PLC102 controls the spindle brake of the spinning frame to prevent the spindle from being pulled out when the yarn is full. Reverse; after the host PLC102 receives the signal that the yarn guide plate has fallen from the collective yarn doffing PLC202, the host PLC102 controls the spindle brake device 104 to release the restriction on the main shaft of the spinning frame, so that the spinning frame starts the next spinning. At the same time, the host PLC102 sends a signal to the collective yarn doffing PLC202 during the spinning process, and the collective yarn doffing PLC202 controls the solenoid valve 203 to put the yarn guide plate in a falling state; at the same time, the collective yarn doffing PLC202 sends the alarm information of the collective yarn doffing element 2 during the collective yarn doffing process of the ring spinning frame to the host PLC102, and the host PLC102 sends the alarm information to the human-machine interface 4 for display;

[0057] S6: The collective yarn dropping PLC202 sends the signal of the yarn guide plate falling to the host PLC102. After receiving the signal, the host PLC102 controls the cotton suction fan 105 and the spinning frame main shaft motor 103 to run. The spinning frame main shaft motor 103 drives the spinning frame main shaft to start running to ensure that the spinning frame can automatically spin. While the spinning frame main shaft is running, the host PLC102 sends a signal to the steel ring plate inverter 303 through the human-machine interface 4. The steel ring plate inverter 303 controls the steel ring plate motor 301 to run. The steel ring plate motor 301 drives the steel ring plate to gradually move upwards, and at this time the ring spinning frame starts the next spinning process; while the spinning frame is spinning, the collective yarn dropping PLC202 controls the full yarn lifting motor 206 set at the tail of the spinning machine to remove the full spinning bobbin from the convex plate below the spinning frame, and place the spinning bobbin outside the spinning frame, and control the empty tube lifting motor 205 at the tail of the spinning machine to put the empty spinning bobbin back on the top of the convex plate, so as to prepare for the next collective yarn dropping of the spinning frame.

[0058] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A collective doffing control system for a ring spinning frame, characterized in that: include: A collective doffing element, a host element, a steel ring plate control system and a human-machine interface, wherein the steel ring plate control system mainly includes a steel ring plate frequency converter for controlling the operation of the steel ring plate in the spinning frame, the host element receives a signal sent by the collective doffing element, and sends a control signal to the collective doffing element, and the human-machine interface receives signals sent by the host element and the collective doffing element, and controls the host element, the collective doffing element and the steel ring plate frequency converter through the human-machine interface; The collective doffing element includes a servo motor and a plurality of solenoid valves required for the ring spinning frame to complete the collective doffing action, wherein the plurality of solenoid valves are used to respectively control the turning of the yarn guide plate, the inward and outward swing of the herringbone arm, and the inflation and deflation of the tube grabber, and the servo motor drives the collective doffing device to drive the spinning bobbin to move up and down; the collective doffing element also includes: The collective doffing switch power supply is connected to the control terminal of the steel collar plate inverter. The collective doffing switch power supply converts the input 220V AC into 24V and provides power for the entire collective doffing element. At the same time, the collective doffing switch power supply provides power for the steel collar plate inverter through the 24V control terminal of the steel collar plate inverter. The collective doffing PLC is connected to the host components through RS485. The collective doffing PLC is connected to multiple solenoid valves and servo motors. At the same time, the collective doffing PLC is also connected to the empty tube lifting motor and the full yarn lifting motor. The collective doffing PLC controls multiple solenoid valves and servo motors to complete the ring spinning frame's collection action. The collective doffing PLC controls the full yarn lifting motor to remove the full yarn spinning bobbin from the spinning frame, and the collective doffing PLC controls the empty tube lifting motor to place the empty spinning bobbin on the spinning frame; The host component includes a spinning frame main shaft motor, a main shaft brake device, a cotton suction fan and a cleaner motor required for the ring spinning frame to complete the spinning operation. The spinning frame main shaft is driven by the spinning frame main shaft motor to make the spinning frame spin. The main shaft of the spinning frame is quickly braked by the main shaft brake device to stop the spinning frame from spinning. During the spinning process of the spinning frame, the cotton suction fan provides negative pressure for the yarn, and the cleaner motor cleans the spinning frame. The host component also includes: The host switching power supply provides power to the entire host components; The host PLC is connected to the human-machine interface and the collective doffing PLC through RS485. The host PLC is connected to the spinning frame spindle motor, spindle brake device, cotton suction fan and cleaner motor required for the ring spinning frame to complete the spinning operation. The host PLC controls the ring spinning frame spindle motor, spindle brake device, cotton suction fan and cleaner motor required for the spinning operation. The host PLC receives the signal sent by the collective doffing PLC and sends the signal to the human-machine interface. The parameters set in the human-machine interface are distinguished by different PLC communication numbers, and different parameter information is sent to the host PLC and the collective doffing PLC respectively. The steel collar plate frequency converter is connected to the human-machine interface via RS485, the information of the steel collar plate frequency converter is displayed on the human-machine interface, and parameters are set on the human-machine interface to control the operation of the steel collar plate frequency converter. The steel collar plate control system also includes a steel collar plate motor and a steel collar plate motor brake device. The steel collar plate motor is controlled by the steel collar plate frequency converter, the steel collar plate motor drives the steel collar plate to move up and down, and the steel collar plate motor brakes the steel collar plate motor through the steel collar plate motor brake device to stop the movement of the steel collar plate.

2. A collective doffing control system for a ring spinning frame according to claim 1, characterized in that: The collective doffing switch power supply is provided with a collective doffing transformer, which converts 380V AC power into 220V AC power and outputs it to the collective doffing switch power supply.

3. A collective doffing control system for a ring spinning frame according to claim 2, characterized in that: The collective yarn dropping element also includes a collective yarn dropping servo driver, a collective yarn dropping circuit breaker, a collective yarn dropping contactor and a solid-state relay controlled by a collective yarn dropping PLC. The collective yarn dropping servo driver is connected to the servo motor, and the operation and stop of the servo motor are controlled by the collective yarn dropping servo driver; the collective yarn dropping circuit breaker includes a three-phase circuit breaker, a two-phase circuit breaker and a single-phase circuit breaker, wherein the servo motor, the empty tube lifting motor and the full yarn lifting motor are all connected with three-phase circuit breakers, and a plurality of three-phase circuit breakers respectively perform circuit protection on the servo motor, the empty tube lifting motor and the full yarn lifting motor according to power and current specifications, the two-phase circuit breaker is connected to the collective yarn dropping transformer, and the collective yarn dropping transformer is protected by the two-phase circuit breaker, and the single-phase circuit breaker protects the collective yarn dropping switch power supply; the servo motor and the full yarn lifting motor are both provided with the collective yarn dropping contactor, and a plurality of collective yarn dropping contactors respectively perform power-on and power-off control on the servo motor and the full yarn lifting motor; the solid-state relay is connected to the empty tube lifting motor, and the power-on and power-off control on the empty tube lifting motor is performed by the solid-state relay.

4. A collective doffing control system for a ring spinning frame according to claim 1, characterized in that: The host switching power supply is provided with a host transformer, and the host transformer converts 380V AC power into 220V AC power and outputs it to the host switching power supply.

5. A collective doffing control system for a ring spinning frame according to claim 4, characterized in that: The host components also include a host three-phase circuit breaker, a host two-phase circuit breaker, a host single-phase circuit breaker, a bridge rectifier stack and a host contactor controlled by a host PLC. The cotton suction fan and the cleaner motor are both connected to the host three-phase circuit breaker, and multiple host three-phase circuit breakers respectively protect the cotton suction fan and the cleaner motor. The host two-phase circuit breaker is connected to the host transformer, and the host two-phase circuit breaker protects the host transformer. The host single-phase circuit breaker protects the host switch power supply; the bridge rectifier stack is connected to the spindle brake device, and the spindle brake device is powered by the bridge rectifier stack; the cotton suction fan, the cleaner motor, the spindle brake device and the steel collar plate brake device are all connected to the host contactor, and multiple host contactors respectively control the power on and off of the cotton suction fan, the cleaner motor, the spindle brake device and the steel collar plate motor brake device.

6. A collective doffing control method for a ring spinning frame, characterized in that: A collective doffing control system for a ring spinning frame according to any one of claims 1 to 5, wherein the control method is: S1: Turn on the host switch power supply and the collective doffing switch power supply. The host switch power supply provides power for the host components, and the collective doffing switch power supply provides power for the collective doffing components and the collar plate inverter. At the same time, set different parameters on the human-machine interface. These parameters are distinguished by different PLC communication numbers, and these different parameter information are sent to the host PLC, collective doffing PLC and collar plate inverter respectively. S2: After receiving the signal, the host PLC controls the cotton suction fan to start running, and then controls the spinning frame main shaft motor to start running. The spinning frame main shaft motor drives the spinning frame main shaft to run, so that the spinning frame starts spinning. In this process, the cotton suction fan provides negative pressure to the yarn; S3: The host PLC sends the signal of the spinning frame main shaft operation to the human-machine interface for display. The human-machine interface sends the signal to the steel ring plate inverter, and sends the parameters of the full yarn position, lower limit and the upward and downward movement speed of the steel ring plate set on the human-machine interface to the steel ring plate inverter. After receiving the signal, the steel ring plate inverter controls the steel ring plate motor to drive the steel ring plate to gradually move upward. At the same time, the steel ring plate inverter sends the signal to the human-machine interface for display; S4: When the collar plate inverter controls the collar plate motor to drive the collar plate to move up to the highest full yarn position, the collar plate inverter quickly lowers the collar plate to the lower limit position through the collar plate motor. When the collar plate motor drives the collar plate to move to the lower limit position, the host PLC controls the collar plate brake device to brake the collar plate motor to stop the collar plate from moving. The collar plate inverter sends a signal to the host PLC through the human-machine interface to stop the collar plate from moving. After receiving the signal, the host PLC controls the spindle brake device to brake the spindle of the spinning frame to stop spinning. Then, the host PLC controls the cotton suction fan to stop running, and the host components and the collar plate control system stop running. The host PLC sends a signal to stop the host components to the collective doffing PLC and the human-machine interface. S5: After receiving the spindle stop signal sent by the host PLC, the collective doffing PLC controls the solenoid valve to flip up the yarn guide plate. The collective doffing PLC controls the servo motor to drive the collective doffing device to move up and down through the collective doffing servo driver. At the same time, the collective doffing PLC controls the inward and outward swing of the herringbone arm and the inflation and deflation of the tube grabber through multiple solenoid valves. Through the joint action of the collective doffing device, the herringbone arm and the tube grabber, the fully spun spinning bobbin is removed and placed on the convex plate under the spinning frame, and then the empty spinning bobbin is moved upward from the bottom of the spinning frame to be inserted into each spindle. After that, the collective doffing PLC controls the solenoid valve to drop the yarn guide plate. During this process, the collective doffing PLC sends a signal to the human-machine interface for display; S6: The collective yarn dropping PLC sends the signal of the yarn guide plate falling to the host PLC. After receiving the signal, the host PLC controls the cotton suction fan and the spinning frame main shaft motor to run. The spinning frame main shaft motor drives the spinning frame main shaft to start running, ensuring that the spinning frame performs automatic spinning. While the spinning frame main shaft is running, the host PLC sends the signal to the steel collar plate inverter through the human-machine interface. The steel collar plate inverter controls the steel collar plate motor to run, so that the steel collar plate motor drives the steel collar plate to gradually move up; while the spinning frame is spinning, the collective yarn dropping PLC controls the full yarn lifting motor set at the tail of the spinning machine to remove the full spinning tube from the convex plate below the spinning machine, and place the spinning tube outside the spinning machine, and control the empty tube lifting motor at the tail of the spinning machine to put the empty spinning tube back on the top of the convex plate to prepare for the next collective yarn dropping of the spinning machine.

7. A collective doffing control method for a ring spinning frame according to claim 6, characterized in that: In step S1, the input voltage of the external power supply is converted into the voltage output required by the host switching power supply through the host transformer, and the host switching power supply converts the voltage output by the host transformer into the voltage output required by the host components. The host PLC controls the power supply of the cotton suction fan, the cleaner motor, the spindle brake device and the collar plate motor brake device through multiple host contactors. At the same time, the host PLC supplies power to the spindle brake device through the bridge rectifier stack. In this process, the host transformer is protected by the host two-phase circuit breaker, the host switching power supply is protected by the single-phase circuit breaker, and the cotton suction fan and the cleaner motor are protected by multiple host three-phase circuit breakers. The input voltage of the external power supply is converted into the voltage output required by the collective doffing switching power supply through the collective doffing transformer, and the collective doffing switching power supply converts the output voltage of the collective doffing transformer into the voltage output required by the collective doffing element. The collective doffing PLC controls the servo motor and the full yarn lifting motor to be powered on respectively through multiple collective doffing contactors, and the collective doffing PLC controls the empty tube lifting motor to be powered on through the solid-state relay. In this process, the collective doffing transformer is protected by a two-phase circuit breaker, the collective doffing switching power supply is protected by a single-phase circuit breaker, and the servo motor, the empty tube lifting motor and the full yarn lifting motor are protected by multiple three-phase circuit breakers.

8. A collective doffing control method for a ring spinning frame according to claim 6, characterized in that: In step S4, after the host PLC controls the cotton suction fan to stop running through the host contactor, the host PLC controls the cleaner motor, the spindle brake device and the steel collar plate motor brake device to cut off the power through multiple host contactors, so that the cleaner motor, the spindle brake device and the steel collar plate motor brake device stop running, and at the same time, the steel collar plate inverter controls the steel collar plate motor to stop running.

9. A collective doffing control method for a ring spinning frame according to claim 6, characterized in that: In step S5, the signal transmission between the host PLC and the collective yarn doffing PLC includes: when the spinning frame performs collective yarn doffing, the host PLC sends a signal to the collective yarn doffing PLC, the collective yarn doffing PLC controls the collective yarn doffing element to start running, and the collective yarn doffing device of the collective yarn doffing element is at the moment of pulling out the spinning bobbin full of yarn, the collective yarn doffing PLC sends a signal to the host PLC, the host PLC controls the spindle brake device to brake the spinning frame main shaft through the bridge rectifier stack and the host contactor, and the host PLC controls the spinning frame main shaft to brake to prevent the spindle from reversing when the yarn is fully pulled out; after the host PLC receives the signal sent by the collective yarn doffing PLC that the yarn guide plate has fallen, the host PLC controls the spindle brake device to release the restriction on the spinning frame main shaft, so that the spinning frame starts the next yarn drop, and at the same time, the host PLC sends a signal to the collective yarn doffing PLC during the spinning process, and the collective yarn doffing PLC controls the solenoid valve to put the yarn guide plate in a falling state.

10. A collective doffing control method for a ring spinning frame according to claim 6, characterized in that: In step S5, the collective doffing PLC sends the alarm information of the collective doffing element in the collective doffing process of the ring spinning frame to the host PLC, and the host PLC sends the alarm information to the human-machine interface for display.

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