Multi-variable-frequency spinning water suction intelligent control system

Abstract

The utility model relates to the field of textile industry automation control, in particular to a multi-frequency-conversion textile water suction intelligent control system, which comprises a water tank, a PLC (programmable logic controller) control unit, a frequency conversion module controlled by the PLC control unit and an analog quantity module connected with the PLC control unit. The analog quantity module is connected with the frequency conversion module through the MODBUS RTU communication network; the analog quantity module is further connected with an HMI human-machine interface, a water level detection module used for detecting the liquid level of the water tank and a pressure detection module used for detecting the pressure of the spinning water suction pipeline. In addition, the accuracy of suction pressure control in the spinning process is improved, the pump response speed is increased or decreased through switching, and then the textile quality and the production efficiency are optimized.

Description

Technical Field

[0001] The utility model belongs to the field of automatic control of the textile industry, and in particular relates to a multi-frequency textile water suction intelligent control system. Background Art

[0002] Previous textile water extraction control systems often employed a multi-frequency control scheme coupled with a single inverter. This approach limited control accuracy and flexibility, resulting in significant water pressure fluctuations when switching between frequency modes, making it difficult to meet the stringent constant pressure control requirements of modern textile processes. With the advancement of automation technology, applying PLC PID control strategies to multi-frequency systems has become a new approach to improving system performance and keeping pace with the data collection and application era.

[0003] The technical solution before improvement is as follows Figure 1 As shown, only one frequency converter is used for operation and adjustment. When the pressure is not reached, the frequency converter exits and switches to the power frequency pump. The water pump is continuously switched to work, and the power frequency is switched by contactors KM2\KM4\KM6\KM8\KM10. The switching process of the frequency converters KM1\KM3\KM5\KM7\KM9 will cause the water supply pressure to fluctuate and the frequent switching of the contactors will increase the failure rate. Utility Model Content

[0004] In order to solve the problem that the existing textile water suction system usually only uses one frequency converter for operation and adjustment, and switches the frequency converter's working frequency through a contactor, the switching process will cause the water supply pressure to fluctuate, resulting in low accuracy and large fluctuations in the suction water supply pressure; and the frequent switching of the contactor will increase the failure rate and cannot ensure stable production. The utility model provides a variable textile water suction control system with a low failure rate, and improves the accuracy of suction pressure control and the response speed of switching to increase or decrease pumps during the textile process, thereby optimizing textile quality and production efficiency.

[0005] The technical solution of the utility model is as follows:

[0006] A multi-frequency textile water suction intelligent control system includes a water tank, a PLC control unit, a frequency conversion module controlled by the PLC control unit, and an analog module connected to the PLC control unit; the analog module is connected to the frequency conversion module via a MODBUS RTU communication network; the analog module is also connected to an HMI human-machine interface, a water level detection module for detecting the liquid level of the water tank, and a pressure detection module for detecting the pressure of the textile water suction pipeline.

[0007] Preferably, the frequency conversion module includes 5 frequency converters, each of which controls a water suction pump and a motor connected to the water suction pump.

[0008] Preferably, the analog module is an FX2N-2AD analog module.

[0009] Preferably, the PLC control unit controls the frequency conversion module through a start-stop relay.

[0010] Preferably, the water level detection module realizes water level collection and detection through a liquid level sensor arranged in the water tank.

[0011] Preferably, the PLC control unit is a Mitsubishi FX3U-32MR PLC control chip.

[0012] Preferably, the pressure detection module realizes pressure detection through a remote pressure gauge arranged on the textile water suction pipeline.

[0013] Preferably, the water tank is connected to a water supply pipeline, and the water supply pipeline is provided with a start-stop relay controlled by the PLC control unit and a solenoid valve connected to the start-stop relay.

[0014] Preferably, the PLC control unit is connected to a fault light, the fault light is connected to a start-stop relay, and the start-stop relay is connected to the PLC control unit.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) Significantly improve control accuracy: The combination of PID algorithm and multi-frequency converter can achieve fine-tuning control of textile constant pressure suction, improving the consistency and quality of textiles.

[0017] (2) Improve system response speed: The PLC control module has a built-in PID algorithm to achieve fast communication and computing capabilities, enabling the system to quickly adapt to changes in the production process and reduce adjustment time.

[0018] (3) Enhance system stability and reliability: The variable frequency constant pressure water supply and pumping scheme of the utility model eliminates contactor interlocking and frequent switching, ensuring the long-term stable operation of the system.

[0019] (4) Optimize energy use: Precise control strategies reduce energy waste and comply with the production concept of energy conservation and emission reduction.

[0020] (5) Easy to maintain and upgrade: Standardized communication protocols and modular design facilitate system maintenance, expansion and technical upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The following is a schematic diagram of the circuit structure of an existing textile water suction control system;

[0022] Figure 2This is the secondary circuit diagram of the full-frequency constant-pressure water supply and suction system of this utility model;

[0023] Figure 3 This is the circuit principle diagram of the frequency converter of the utility model;

[0024] Figure 4 This is the full-frequency constant-pressure water supply control suction flow chart of the utility model;

[0025] Figure 5 This is a schematic diagram of the overall structure of the utility model;

[0026] In the figure: 1-PLC control unit, 2-frequency conversion module, 3-analog module, 4-HMI human-machine interface, 5-water level detection module, 6-pressure detection module, 7-water tank. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] See also Figure 2-5 A multi-frequency textile water suction intelligent control system includes a water tank 7, a PLC control unit 1, a frequency conversion module 2 controlled by the PLC control unit 1, and an analog module 3 connected to the PLC control unit 1; the analog module 3 is connected to the frequency conversion module 2 via a MODBUS RTU communication network; the analog module 3 is also connected to an HMI human-machine interface 4, a water level detection module 5 for detecting the liquid level of the water tank 7, and a pressure detection module 6 for detecting the pressure of the textile water suction pipeline.

[0029] See also Figure 3 In one embodiment of the present invention, the frequency conversion module 2 includes 5 frequency converters, each of which controls a water suction pump and a motor connected to the water suction pump. Figure 3 As shown in M1-M5, the frequency converter adjusts the speed of the motor and controls the output flow of the water suction pump by receiving the analog output signal feedback from the PLC control unit.

[0030] Furthermore, in a preferred embodiment of the present invention, the model of the inverter is Yaskawa CIPR-GA70B4103ABBA-AAAAAA.

[0031] In one embodiment of the present invention, the analog module 3 is an FX2N-2AD analog module.

[0032] See also Figure 2 In one embodiment of the present invention, the PLC control unit controls the frequency conversion module via a start-stop relay, and the start-stop relay is as follows: Figure 2 KA1-KA5 in.

[0033] See also Figure 2 and Figure 5 In one embodiment of the present invention, the water level detection module 5 realizes water level collection and detection through a liquid level sensor provided in the water tank 7 .

[0034] In one embodiment of the present invention, the PLC control unit is a Mitsubishi FX3U-32MR PLC control chip.

[0035] See also Figure 2 and Figure 5 In one embodiment of the present invention, the pressure detection module 6 realizes pressure detection by a remote pressure gauge provided on the textile water suction pipeline.

[0036] See also Figure 2 and Figure 5 In one embodiment of the present utility model, the water tank 7 is connected to a water supply pipeline, and the water supply pipeline is provided with a start-stop relay KA6 controlled by the PLC control unit and a solenoid valve connected to the start-stop relay KA6.

[0037] See also Figure 2 In one embodiment of the present utility model, the PLC control unit 1 is connected to a fault light, the fault light is connected to a start-stop relay KA7, and the start-stop relay KA7 is connected to the PLC control unit 1.

[0038] The working principle of this utility model is as follows:

[0039] See also Figure 4 , start the machine, the system determines whether the water level is normal, if the water level is insufficient, it will automatically replenish water first, when the water level fails to be replenished, the water level drops to the lower limit (1.5 meters), the alarm mechanism responds, the PLC control unit outputs a signal to connect the start-stop relay KA7 to alarm, the alarm light comes on, prompting the on-duty personnel to handle it.

[0040] When the water level is within the normal range, the PID communication control mechanism is triggered: Mitsubishi PLC has a built-in PID control algorithm, which receives the feedback signal of the pressure sensor in real time, calculates the ideal control output value, and then sends synchronous data frequency instructions to each inverter through the high-speed communication interface (MODBUSRTU) to achieve synchronous pressure regulation of the water pump speed, which can perform high-precision control of the water outlet pipe pressure. The PID algorithm can be dynamically adjusted according to the actual working conditions to ensure that the system responds quickly and maintains a constant water supply pressure to reach the terminal suction pressure.

[0041] The pressure sensor detects that the water supply pressure in the water outlet pipe is stable, and the workshop user end can simultaneously switch on and off the N branch suction work.

[0042] The water passes through the return main line in the water tank and returns to the water inlet end of the pool for closed circulation.

[0043] The communication function of the inverter of this utility model includes fault diagnosis and safety protection: comprehensive system monitoring is achieved through PLC programming, including equipment motor status monitoring, operating current, operating voltage, fault warning and emergency shutdown protection measures to ensure production safety.

[0044] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-frequency textile water suction intelligent control system, including a water tank, characterized in that: It also includes a PLC control unit, a frequency conversion module controlled by the PLC control unit, and an analog module connected to the PLC control unit; the analog module is connected to the frequency conversion module via a MODBUS RTU communication network; the analog module is also connected to an HMI human-machine interface, a water level detection module for detecting the water level in the water tank, and a pressure detection module for detecting the pressure in the textile water suction pipeline.

2. A multi-frequency textile water suction intelligent control system according to claim 1, characterized in that: The frequency conversion module includes five frequency converters, each of which controls a water suction pump and a motor connected to the water suction pump.

3. The multi-frequency textile water suction intelligent control system according to claim 1 is characterized in that: The analog module is the FX2N-2AD analog module.

4. The multi-frequency textile water suction intelligent control system according to claim 1 is characterized in that: The PLC control unit controls the frequency conversion module through the start-stop relay.

5. The multi-frequency textile water suction intelligent control system according to claim 1 is characterized in that: The water level detection module realizes water level collection and detection through a liquid level sensor arranged in the water tank.

6. The multi-frequency textile water suction intelligent control system according to claim 1 is characterized in that: The PLC control unit is Mitsubishi FX3U-32MR PLC control chip.

7. The multi-frequency textile water suction intelligent control system according to claim 1 is characterized in that: The pressure detection module realizes pressure detection through a remote pressure gauge arranged on the textile water suction pipeline.

8. The multi-frequency textile water suction intelligent control system according to claim 1 is characterized in that: The water tank is connected to a water supply pipeline, and the water supply pipeline is provided with a start-stop relay controlled by the PLC control unit and a solenoid valve connected to the start-stop relay.

9. The multi-frequency textile water suction intelligent control system according to claim 1 is characterized in that: The PLC control unit is connected to a fault light, the fault light is connected to a start-stop relay, and the start-stop relay is connected to the PLC control unit.

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