Automatic control of the press.
1 Overview Compressed air is the main source of power for the machinery industry. At the same time, our company uses compressed air to collect air from air compressor stations. Several Ningguan stations supply air to users through transmission and communication, all of which are piston air pressure. Machine, which has 3 sets of 10, 1 air compressor, and 2 sets of 60 air compressors. The annual power consumption of these air compressors is very impressive. The demand for air pressure in all units of the company is between 0.6 and 0.68. Due to the variety of wind equipment and the large amount of air used, the air volume is often uneven. The system pressure varies greatly. When the system pressure is lower than 0.68, it can only be artificially stopped or manually drained; and below 0.6 must be artificial! Dynamic standby machine, 2 system exists. When the pressure of the air compressor is too high, the pressure of the air compressor is too high. When the pressure is low, only the shirt can be opened, and the compressed air is released by opening the vent valve to achieve the voltage regulation. The role, but the energy waste of this approach is quite amazing.
Air compressors frequently start and stop, resulting in an increase in equipment failure rate, and the cost of spare parts for operation and maintenance work is high.
The piston air compressor produces a large amount of oil and water into the pipe network, not only for the gauge pipe. History caused losses to CNC equipment.
The proposal of the 3 square frame is due to the stable requirements of the system for the air pressure and the high quality of the Ningfeng wind. The original piston air compressor can not meet the actual requirements, and the replacement of the replacement hall, the new screw 4 Then, each screw machine is equipped with a refrigerating dryer, and then the air compressor remote control system is used to remotely control the air compressor to meet the current production requirements.
4 The function realized by the remote monitoring system design completes the collection of all real-time parameter running states, and has the function of alarm history process.
The exhaust gas temperature alarm value of the configuration parameters is loaded and unloaded.
Compressor motor stator bearing temperature a total of 5 points of communication using only 5485 interface, the software is prepared to consider the scale of 8 compressors.
5 Remote monitoring system structure In the screw unit system, the industrial control system and the hole are used to form a monitoring system. The control machine adopts the hole as the lower position machine of the upper computer. The Shenzheng protocol can be used for remote monitoring through the network. In order to improve the network transmission speed, the data link layer uses the Ethernet called frequently. The entire system will be incompatible with the control technology pressure dynamic stability control technology computer technology communication technology network technology database technology 14 shape and cutting technology data, set and control technology organically.
The design of the monitoring system will adopt a control structure to realize the field layer of the control layer at the current level.
Management is responsible for the coordination and management of the entire system. The industrial computer is used to monitor and control the running state of the whole system in real time, and realize the data display data processing data storage alarm report printing of the process. And the lower position machine constitutes the on-site communication system, the aspect of the equipment state, that is, the process parameters are displayed to the user, and some output control operation commands are transmitted to the factory machine. Achieve remote control.
The control layer uses the hole 0 control system to sample and process the signal from the field. And, the ground feedback to the bamboo machine.
The field level controls the field through the micro-controller of each air compressor. Sensor transmitters, etc. The sensor transmitters are all installed in the field and digitally measured by an expansion module connected to the carmine layer. The organic combination of this level can guarantee the advanced nature and reliability of this automatic control system. The entire remote monitoring system structure 2.
6 joint control system software structure joint control system monitoring server front-end application program is developed with 06.0, set byte people adopt version 2.0, and the network structure adopts the popular 3 client server model.
6.1 The application mainly completes the following main functions: pressure analysis and control. Under normal production process conditions, the tracheal pressure is controlled within the set range ± 0.2, 2.
Each unit's control value is set, and its active and standby roles are modified online.
Realize the state of each unit according to the actual gas 1 and the maximum energy saving benefit.
Real-time monitoring of relevant parameters of each site for real-time trending of parameters and history of the cast of the trend 3 process flow visually has a report printing function in Chinese.
When a parameter exceeds the alarm limit or an abnormality, the corresponding text portion will flash, different alarms are limited to different colors, and an alarm sound is raised. Remind the operator to make a look. After the fault is removed, the report will be fired. This report is called to be saved in the fault alarm record so that it can be called at any time.
6.2 Server-side program introduction In order to increase the user authentication process.
Monitoring data of each compressor; network transmission data; above the monitoring parameters of the compressor are important data for remote monitoring. In order to ensure that the server does not affect the collection of several cents in the process of transmitting data, the data collection function is implemented by threads. The server-side monitoring data is read-only to the client, so there is no question of variable exclusive access.
6.3 monitoring terminal client software structure 30 knows that 1 is the server address, then call 36150, 18, such as 3 print 13 to send account information, where 1 is the input 0000 attached structure, then call 6, 5013, such as 1 anvil call, such as receiving monitoring The compressor monitoring data transmitted by the server displays the received data in real time, so that the monitoring personnel can have an intuitive understanding of the operation of the air compressor.
7 Conclusion By updating the original piston machine of the air compressor station into a screw machine and remotely monitoring the ten-pressure unit through the remote coupling system, the following main units can be started and stopped in a predetermined order. Avoid frequent start and stop of air compressors.
The system's pressure will be controlled to operate within the set range. According to the pressure change air compressor, the flow rate is automatically adjusted, and the running power is also reduced accordingly. This item can save electricity costs of 150,000 yuan per year. The operation and alarm signals of the air compressor can be transmitted to the monitoring room in real time, thus remotely operating the air compressor unit.
The compressed air is oil-free and water-free, meeting the needs of users.
1 Yukai Temple, the development tool of real-time control system under 498 environment. Computer Application Research, 20018玢6 Jing Tsinghua University Press, 2000.
3 Shi Lilian and so on. Development of air compressor unit monitoring system based on Zha
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