The future development direction of new type temperature control instrument

Ordinary temperature control instruments can not meet the needs of the current industrial production, temperature control instruments in the new direction is inevitable. What is the future development trend of the new temperature control instrument?

Over the years, traditional temperature control devices commonly use dynamic-type millivolt meters and electronic potentiometers as temperature-controlled instruments, combined with AC contactors. Although the cost is low, there are problems of poor temperature control accuracy and high power consumption. The traditional instrument has low temperature control accuracy and the temperature control deviation can reach ±10°C or more. It is difficult to guarantee the temperature requirements of the part process. Furnace temperature can only be controlled according to the gradient, the heating element is powered at full voltage, full power operation, so that the abnormal increase of electricity consumption of the electric furnace, resulting in waste of electrical energy, virtually increase the company's production costs.

At present, the temperature of traditional instruments that are used more often is indicated by pointers. The display is not intuitive, the accuracy is low, and the shock resistance is poor. Therefore, it is necessary to regularly verify the maintenance costs. It is very troublesome to replace the recording paper every day with the automatic balance recording controller of the circle chart, and it is not suitable for continuous process recording of more than 24 hours, and it is not easy to save. Less than requirements and other issues affect product quality. At the same time, traditional instruments have no time program control, over-temperature alarm, and other functions, and can not meet some process requirements that require temperature, insulation, cooling rate and other procedures to perform.

Therefore, the old temperature control equipment can no longer meet the needs of modern industrial production. Modern industry should make full use of high-precision and automated procedures with high intelligent temperature control technology to realize the automation of heat treatment temperature control process, and it is very necessary to replace traditional instruments. At present, the MZK intelligent temperature control cabinet is a new generation product designed and produced with the AI ​​or LU series artificial intelligence industrial regulator as the core technology. It consists of smart meters, power measuring instruments, thyristors or large solid-state relay temperature control units, AC contactor power supply units, sensors, switches and other components.

MZK series products have simple circuit and modular structure, and they are very convenient to use, maintain and extend functions. System control software The industrial control software uses the excellent Chinese-made configuration software MCGS Universal Edition as a development platform. It runs on Chinese Windows Windows. , Can support most of the data acquisition boards, smart meters, PLCs, inverters and other hardware on the current market, powerful.

The overall structure of the continuous drying furnace KCS type computer distributed control system designed according to the process requirements is shown in the overall structure of the continuous drying furnace system. The entire system consists of six furnace front control cabinets (including smart meters, programmable controllers, electric heating controllers, various types of contactors, switches, etc.) and an upper cabinet (including auxiliary equipment such as industrial control machines or personal computers and printers) )composition. The upper computer adopts an inexpensive personal PC. If the operating environment is poor, IPC is recommended, but the price is higher. The number of control zones is set to 24 points. If the number of heating control zones or devices is increased, it can be increased to hundreds (even infinite). The system communication AI series instrument adopts RS485 communication interface, the communication distance is as long as 1km, plus connects RS232/RS485 converter and upper computer connection. Communication interface is 8-bit data, 1 or 2 stop bits, no parity bit. The data adopts 16-bit sum check, and its error correction capability is tens of thousands times higher than the parity check, which ensures the correct and reliable communication data.

The use of high-precision smart meters can completely replace the existing conventional meter functions. More importantly, it can simulate human brain thinking and quickly and accurately complete tasks that cannot be replaced by traditional technologies. Based on the adoption of MZK type high-precision intelligent temperature controller and PLC as the lower computer, the corresponding interface and connection are selected, and the upper computer and related peripherals are purchased. Through the industrial control configuration software, a KCS distributed control system can be constructed. This type of system uses the perfect functions of the upper computer's industrial control software and is organically combined with advanced intelligent instruments and programmable controllers and other lower machines. It effectively and reliably realizes the automatic control of the heating furnace, thus making the equipment highly technical and The level of technology, and system performance is excellent, reliable, low cost, easy installation and use, has a high promotion value.