WO2015066841A1

WO2015066841A1 - Method and apparatus for controlling dual-tank impregnation dual-drum loose dyeing

Info

Publication number: WO2015066841A1
Application number: PCT/CN2013/086562
Authority: WO
Inventors: 徐达明
Original assignee: 立信染整机械(深圳)有限公司
Priority date: 2013-11-05
Filing date: 2013-11-05
Publication date: 2015-05-14

Abstract

Disclosed are a method and apparatus for controlling dual-tank impregnation and dual-drum loose dyeing. The method mainly comprises: a dyeing machine is activated, a fabric is introduced, and at the same time a dye injection system is activated; the fabric is driven by a master drum (3) and a slave drum (4) for cycled dyeing; the fabric is dip-dyed twice; the rotational speed of the slave drum (4) is increased until the fabric touches a sensor device (11); and, the rotational speed of the slave drum (4) is reduced until the fabric moves away from touching the sensor device (11). The apparatus comprises the master drum (3), the slave drum (4), a passive wheel (5), a bottom tank (10), an upper tank (6) provided with the sensor (11), and a controller. The controller is provided with a control loop system, a fabric automatic slacking control system, a master drum speed control system, a slave drum speed control system, a slack alarm control system, and a tightened-state detection system. The method and apparatus are widely applicable in the dyeing and finishing industry.

Description

Method and device for controlling double-slot dip dyeing double drum loose dyeing

The present invention relates to a method and apparatus for dyeing, and more particularly to a method and apparatus for controlling dyeing of a double tank dip dyeing double drum. Background technique

The traditional method of dyeing cloth is to adopt the bottom tank dip dyeing method. The trough dyeing machine using this traditional method is a single-tank double-drum dyeing machine as shown in Fig. 1. The dyeing is done by immersing the cloth in the dye liquor of the bottom tank. . Due to the gravity of the cloth, they will squeeze each other at the bottom groove position, the water permeability will be deteriorated, and the dyeing liquid will not easily penetrate into the cloth, and the leveling property is poor. In order to ensure uniform dyeing, it is necessary to increase the bath ratio and increase the number of cloth cycles, which greatly increases the cost and energy consumption. Moreover, in the conventional method, the cloth is circulated in the bottom groove by the front and rear drum driving, and the main and secondary drum speeds are controlled by the tensioning method, that is, the main drum is pulled from the drum by the cloth pulling. Because the cloth is in a tight state for a long time, the leveling property is poor, especially when dyeing thick and heavy fabrics, the dyeing effect is difficult to reach the standard, which has been a major problem that plagues the development and application of the dyeing machine. Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus which can overcome the above-mentioned drawbacks of conventional dyeing machines and which can control the use of double-tank dip dyeing in a relaxed state, thereby improving the leveling property of dyeing.

The traditional trough dyeing machine is composed of a single-slot double drum. The dyeing method is to adopt the bottom tank dip dyeing method. According to the dyeing principle and the experiment, if the cloth is added to the dyeing opportunity for secondary dyeing, the dyeing leveling property will be more than that. The groove dyeing is much better. At the same time, if the cloth running between the master and the drum is always in a relaxed state for dyeing, the leveling property will be further improved, but it is necessary to solve a control problem, that is, how to control the speed from the drum to ensure different cloths. The cloths of different dyeing stages should be in a relaxed state, and the stacking of the cloth between the front drum and the passive wheel should not cause the machine to be poor. That is, a loose cloth detecting device is needed to detect the between the front drum and the rear drum. Stacking condition, and also requires an automatic control system that controls the speed of rotation from the drum The fabric slack control can be achieved.

The technical solution adopted by the present invention to solve the above technical problems is to provide a method for controlling double-slot dip dyeing double-roller loose dyeing, the steps of which include:

1) start the dyeing machine, put in the fabric, and start the dyeing system at the same time;

2) The fabric is cyclically dyed by the main roller and from the roller;

3) secondary impregnation of the fabric;

4) The rotation speed of the drum will be increased until the fabric touches the sensing device;

5) the rotation speed of the drum will be lowered until the fabric leaves the touch sensing device;

6) Repeat steps 4-5.

The technical solution adopted by the present invention to solve the above technical problems also provides a double-slot double-roller loose dyeing device for implementing the above method, the device comprising a main drum (3), a slave drum (4), a passive wheel (5), The bottom slot (6) further includes an upper slot (6) and a controller for the device sensing device (11).

The invention provides a double-slot double-roller loose dyeing device, wherein the upper tank (6) is installed between the main drum (3) and the slave drum (4), and a set of nozzles is mounted on the upper tank (6) ( 7).

The invention provides a double-slot double-roller loose dyeing device, which is provided with a controller, and the controller is respectively connected with the sensing device (11), the main roller (3) and the slave roller (4), and the controller is calculated The signal fed back by the sensing device (11) controls the rotational speed of the main drum and the slave drum.

The invention provides a double-slot double-roller loose dyeing device, wherein the sensing device (11) is mounted on an adjustable position movable bracket (12) on the upper slot (6).

The invention provides a double-slot double-roller loose dyeing device, wherein the upper tank (6) can be equipped with more than one sensing device (11).

The invention provides a double-slot double-roller loose dyeing device, wherein the controller is provided with a control loop system, an automatic cloth slack control system, a main drum speed control system, a slave drum speed control system, a slack alarm control system, Tighten the condition detection system.

The invention provides a double-slot double-roller loose dyeing device, the control loop system, the cloth automatic slack control system, the main drum speed control system, the slave drum speed control system, the slack alarm control system, and the tension state detection The system consists of a main drum speed control module, a drum speed control module, and a relaxation timeout alarm control module.

The invention provides a set of detecting device and an automatic slack control system, so that the cloth between the front drum and the driven wheel is in a relaxed state, and the invention provides the sensing between the roller and the driven wheel. The device (11), when the cloth is slack, will fall into contact with the sensing device (11) due to the gravity of the cloth, and the sensing device (11) generates a signal and introduces the signal into the signal conversion board, and the signal conversion board will The signal is introduced into the input point of the drum speed control module, and the inverter speed signal from the drum is also introduced into the drum speed control module, and the rotation speed of the slave drum is controlled by the control program of the drum speed control module. When the cloth is tightened, the cloth does not touch the sensing device (11). When the control module does not receive the cloth conductive signal, the cloth is in tension, that is, the speed needs to be adjusted from the drum, and the control module program will increase. The current signal of the current output port is used to increase the frequency of the inverter, so that the rotation speed is increased from the drum; when the rotation speed of the drum is increased, the cloth will be slackly operated, and when the drum speed control module receives the corresponding signal, the drum is required to be slowed down. Speed, otherwise there will be too many stackings causing poor running, so the control module program will reduce the current signal of the current output port to reduce the frequency of the inverter, thus slowing down the speed from the drum, so that the reciprocating automatic control from the drum The speed, so that the cloth continues to be in a proper relaxed state.

The invention has the outstanding advantages and effects, and the method and the device of the invention overcome the traditional dyeing machine work, the cloth will squeeze each other at the bottom groove position, the water permeability is deteriorated, and the dyeing liquid is not easily penetrated into the cloth, in order to The dyeing is uniform, and the bath ratio has to be increased, the number of times of the cloth is increased, the time consumption is low, and the leveling property is poor. The present invention increases the chance of dyeing the cloth once, greatly improves the dyeing leveling property, and at the same time makes the main The cloth running between the rollers is always dyed in a relaxed state, so that the leveling property is further improved, and the dyeing efficiency is improved, and the energy is largely saved. DRAWINGS

figure 1

figure 2

Figure 5 Schematic diagram of the control loop

Figure 6 main drum speed control block diagram

Figure 7 from the drum speed control block diagram

Figure 8 Relaxation timeout alarm control block diagram Figure 10 Dual detection device diagram

Figure 11 Schematic diagram of sensor installation in the master cylinder

Main cylinder

2. Work door

3. From the drum

4. Main roller

5. Passive wheel

6. Upper slot

7. Nozzle group

8. Separator

9. Cloth

10. Bottom slot

11. Sensing device

12. Activity bracket

The technical features of the present invention will be further described below with reference to the accompanying drawings and embodiments.

The embodiment of the method of the invention employs the following steps:

2) the fabric is cyclically dyed by the main roller and from the roller;

3) secondary dyeing of the fabric;

6) Repeat steps 4-5.

In the above-mentioned step 6, the rotational speed of the drum is constantly changing during the dyeing process, and is generally not fixed at a certain speed balance point.

The double-tank double drum dyeing apparatus for carrying out the above method is embodied as shown in Fig. 2. Compared with the traditional single-tank double-drum dyeing machine, an upper tank or dip tank is added between the master and slave cylinders for Secondary dip dyeing to improve leveling, at the same time, the swing frequency control from the drum, so that the cloth in the upper tank is in a relaxed state, so that the secondary dip dyeing effect will reach the best state, and the leveling property can be further improved. improve. In order to realize the slack control from the drum to the cloth, it is necessary to detect the running state of the cloth to adjust the rotation speed of the drum from time to time. Therefore, the cloth slack state detecting device and the automatic drum speed control system are important technical features of the double-slot double drum dyeing device.

The working process of the cloth slack state detecting device, as shown in Fig. 3, when the cloth is tightened, the cloth does not touch the sensing device 11; as shown in Fig. 4, when the cloth is slack, it will contact due to gravity. After the sensing device 11 starts to work, the signal is transmitted to the drum speed control module through the signal conversion board connected to the sensing device 11, so that the automatic swing frequency control of the slave roller is realized.

Control loop structure: As shown in Figure 5, the relevant control loop is mainly composed of control loop and high-power loop. The drum speed control module is the core of the whole control loop. Its external interface is mainly composed of digital and analog input, digital quantity and The simulation output is composed, for example, the Buson signal is connected to the digital input point of the drum speed control module, and the speed control of the inverter is completed by the 4-20 mA analog current of the drum speed control module, and the controller is controlled by the connection port and the drum speed. The module communication connection, the start and stop of the master-slave roller is controlled by the start-stop command transmitted from the controller; the high-voltage circuit is the connection between the master-slave roller motor and the inverter, when the inverter receives the 4-20 mA of the drum speed control module After simulating the current signal, the inverter corresponds to output a 15-50HZ three-phase power supply to the master-slave drum motor, thereby realizing the master-slave drum frequency control.

The signal conversion board converts the signal of the sensing device 11 into a relay switching action, which is mainly outputted by a power supply circuit, an input circuit, an amplification circuit, a comparison circuit, a drive circuit, and a relay contact.

Cloth automatic slack control system: The controller can edit and run the dyeing program and connect the drum speed control module. The drum speed control module is mainly composed of three major control modules: main drum speed control module, slave drum speed control module, relaxation timeout alarm Control module. The three modules execute the commands sent by the controller and complete the automatic control through the output port.

Main drum speed control flow: As shown in Figure 6, the main drum receives the start signal and runs at the speed set by the main drum that the controller has sent. When the stop signal is received, it is stopped after the main drum speed is cleared. .

From the drum speed control flow: As shown in Fig. 7, a timer is used in the speed control from the drum. The role of the timer in this process is to limit the specific time from the drum to a preset period of time. The speed is run to achieve the purpose of adjusting the tension of the cloth.

It is divided into three control stages. The first stage is the start-up operation. When the start signal is received, it runs from the drum at a lower speed than the main drum, so that the brake is tight, and when the start-up time exceeds the set time, it is transferred. High-frequency control; the second stage is high-frequency operation, running from the drum at a higher speed than the main drum, allowing the cloth to relax. When the loose cloth signal is detected or the running time exceeds the set value, it is transferred to the low-frequency control; the third stage is Low frequency operation, running from the drum at a lower speed than the main drum, so that the bra is tight. When the running time exceeds the set value, if the loose cloth signal is not detected, it will be transferred to the high frequency control, otherwise the low frequency will be pressed according to the set value again. control. If the outage signal is received at any of the above three stages, it will be stopped after the drum speed is cleared.

Slack alarm control flow: As shown in Figure 8, A represents the loose cloth signal in the block diagram. R3 represents the time limit set by the internal timer in the block diagram. After starting from the drum, the continuous monitoring of the loose cloth signal is started. If it is continuously maintained for more than the T3 set value, it is considered excessive slack (such as the main drum accident such as overload, slipping, cloth running out of the drum and causing the stacking ), an alarm will be issued to the controller and two rollers will be stopped until the "Reset" button is pressed.

Single-roller drive multi-blade running control device: In practical applications, one roller can drive multiple pieces of cloth to relax and tension, as shown in Figure 9, there are many cloths hanging from the drum and with the roller Operation, when any cloth touches the sensing device 11, the speed can be adjusted from the drum in real time, and each adjustment can eliminate the speed difference caused by the difference in the characteristics of the cloth, so that all the cloth can be made. Relax to the same level - tension control.

Tightening state detection system: In order to achieve an optimum slack-tensioning effect, a plurality of sensing devices 11 may be provided. As shown in Fig. 10, a sensing device is mounted above the cloth, when the cloth touches the device, It indicates that the cloth has been tightened. After the signal is processed by the drum speed control module, the speed from the drum can be accelerated in real time to let the cloth relax in real time.

Figure 11 is an enlarged schematic view showing the mounting structure of the sensor in the master cylinder. As shown, the attachment sensing device 11 and the inner wall of the master cylinder are a movable movable bracket 12 that allows the sensing device 11 to adjust its position within the master cylinder for use in different cloth detections.

Claims

claims

1. A method for controlling double-tank exhaust dyeing and double-roller loose dyeing. The steps include:

1) Start the dyeing machine, put in the fabric, and start the dye injection system at the same time;

2) The main roller and the slave roller drive the fabric to cyclically dye;

3) Secondary dip-dying of the fabric;

4) Increase the rotation speed of the drum until the fabric touches the sensing device;

5) Reduce the rotation speed of the drum until the fabric leaves the touch sensing device;

6) Repeat steps 4-5.

2. A double-trough double-drum loose dyeing device for implementing the method of claim 1, including a main drum (3), a slave drum (4), a driven wheel (5), and a bottom tank (10), and is characterized by also It includes an upper tank (6) equipped with a sensing device (11) and a controller (13).

3. A double-tank double-drum loose dyeing device according to claim 2, the upper tank (6) is installed between the main drum (3) and the slave drum (4), and is installed in the upper tank (6) There is a set of nozzles (7).

4. A double-slot double-drum loose dyeing device according to claim 2, further provided with a controller, which is connected to the sensing device (11), the main drum (3) and the slave drum (4) respectively. , the controller controls the rotation speed of the main drum and the slave drum by calculating the signal fed back by the sensing device (11).

5. A double-tank double-roller loose dyeing device according to claim 2, the sensing device (11) is installed on an adjustable position movable bracket (12) on the upper tank (6).

6. A double-tank double-roller loose dyeing device according to claim 2, wherein the upper tank (6) is equipped with more than one sensing device (11).

7. A double-tank double-roller loose dyeing device according to claim 4, the controller is provided with a control loop system, an automatic cloth relaxation control system, a main drum speed control system, a slave drum speed control system, and a relaxation system. Alarm control system, tensioning status detection system.

8. A double-tank double-roller loose dyeing device according to claim 7, the control loop system, the automatic cloth relaxation control system, the main drum speed control system, the slave drum speed control system, the slack alarm control system, The tensioning state detection system consists of the main drum speed control module, the slave drum speed control module, and the relaxation timeout alarm control module.