In mechanical and electrical products in the application of homogeneous low feeding system

In mechanical and electrical products in the application of homogeneous low feeding system reached the dentsu Zhang Genjun welcome to e hall exhibition hall 3 PLC PLC programmable controller, PLC programming cable. 。 。 Abstract: the low to the fluid is common in textile processing, is also very important. In this paper, the uniform spray disc low feeding system complete electrical equipment adopted in mechanical and electrical products, meet the system requirements, in terms of price also has the very strong competitiveness. In addition, this article also introduces the uniform spray disc low feeding system structure and working principle of equipment, and the control architecture and program implementation. Keywords: low liquid to textile touch-screen PLC1. Device structure and working principle of the spray disc uniform low feeding system is introduced in this paper is a kind of can be all kinds of different liquid to liquid on the textile technology. Its working principle is this: in the highly rotating spray pan of water film, 'formed by the liquid by the strong centrifugal force and centrifugal line on the disk surface into a micron grade water mist high-speed jet to break through the fabric surface, homogeneous infiltration in fabric fiber layer technology, achieve rapid moisture regain, feel plump, shrinkage stability, increase the gram weight, the purpose of reducing energy consumption. This equipment is widely used in preshrinking machine, stenter setting machine, calender, blowing machine and steamer to wet process, has the following characteristics: 1) Touch screen set operation, PLC control; 2) According to the speed automatically adjust the volume of spray, fabric for liquid more uniform; 3) Recycling water spray multilayer filter to ensure that the spray tray of dynamic balance, spray tray using life; 4) Droplet size 30 ~ 70 um. As shown in figure 3, the process liquid or water pump (1) extracting tank (2), through the filter (3) to spray tray in the various spray plate (4) (5); When running open-width fabric 6 through liquid injection on it; Liquid is ejected into the fabric at the end of the flow through the return line 7 back to liquid trough; Through the pre-filter was clear away the impurities in the reflux liquid; Cleaning device pet-name ruby attending ⑾ guarantees for liquid cleaning unit, control unit ⑿ control of the device. Figure 1 spray disc uniform low feeding system equipment full tutu 2 spray pan evenly spray low feeding system tray body figure 3 disc uniform low to liquid system equipment process in figure 2. Electrical architecture diagram and selection according to the characteristics of the customer's equipment cabinet and compact, we offered the customer is configured with the following products: PLC, man-machine interface DVP14SS11R2 * 1: DOP - B05S100 inverter: VFD015M43A speed encoder other electrical accessories figure 4 control architecture in figure 3. Equipment working principle and program instruction 3. 1 HMI screen and work principle of this equipment is mainly used to have woven cloth of good humidification, the input signal has two, one is the host start signal, the other one is host speed pulse signal. When the host starts, spray plate of the motor running, the valve open, set according to the lowest frequency for the pump to run, when the host acc, PLC controller based on the current wheel speed pulse signal of real-time computing the actual linear velocity of cloth, according to the practical linear velocity and humidity set point control for water pump operation frequency, to control the humidity of the cloth. As shown in figure 5. Figure 5 system parameters set parameters: humidity is set is used to set the size of the water supply system parameters screen also set a minimum frequency of water supply and other auxiliary action. As shown in figure 6. Figure 6 user parameter monitoring: monitoring the current host the actual linear velocity and humidity set point. As shown in figure 7. Figure 7 monitoring picture 3. 2 3 PLC program. 2. 1 speed program: this part program principle is to use the high-speed calculation function of PLC built-in, calculated per unit time the number of pulses from speed encoder, then according to the related mechanical coefficient is converted into linear velocity, this value as a calculation for water pump frequency coefficient, and then according to the humidity value, calculate the actual required frequency of water supply. As shown in figure 8. Figure 8 speed program to introduce the other SS PLC high-speed count function, such as table 1, ES/EX/SS series model supports high speed counter, the total bandwidth of 20 KHZ. Table 1 SS PLC high-speed counting the input point for X0, X1 can be designed more high speed counter, phase 1 input up to 20 KHZ, but the two input point counting frequency combined still must be less than or equal to 20 KHZ bandwidth restrictions. If count of 2 phase input signal input, the counting frequency about 4 KHZ. Input point X2, X3 high-speed counter 1 phase input can be up to 10 KHZ. 3. 2. 2 fluid for frequency calculation: used for liquid frequency ( Humidity control) Calculated, when the machine starts, for water pump according to the lowest frequency operation first, after the machine speed increase, after calculation, more than the lowest operating frequency, frequency output in real terms, when the machine stops, then according to the lowest frequency operation, after the delay set time to stop. As shown in figure 9. Figure 9 3 for liquid frequency calculation. 2. 3 communication program: in SS PLC provides two communication port. In this article, SS COM1 port of PLC and touch screen communication, so use of SS PLC COM2 communication ( The communication interface RS485) mouth Convenient, support the MODBUS communication instruction, program communication as simple as sequential logic programming, people know about communication the bottom is not very also can quickly get started. Fast write MODBUS communication program to control such as in the whole series of products, such as frequency converter, temperature controller, servo, etc. As shown in figure 10. Figure 10 communication procedures 4. Conclusion the equipment electrical architecture is simple, function is rich, has won the customer's final approval.
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