Closed type circulating water cooling system of explosion-proof frequency converter applied to coal industry

Abstract

The invention discloses a closed type circulating water cooling system of an explosion-proof frequency converter applied to the coal industry. The cooling system is composed of a primary circulating system and a secondary circulating system, wherein the main circulating system can transfer the power consumption heat of the explosion-proof frequency converter to a system heat exchanger by utilizing water as a heat-conducting medium; heat exchange can be carried out between the system heat exchanger and the external circulating water, thus the explosion-proof frequency converter can be cooled; and the secondary circulating system can purify the cooling medium, reduce the electric conductivity of the cooling medium and also can stabilize the voltage of the whole system. The system provided by the invention greatly expands the applicability of the frequency converter, can be applied to places rich in dust and hazardous gas, has strong loading capacity and can be cooled by using the external circulating water with different voltages.

Description

technical field [0001] The invention relates to a closed circulating water cooling system, in particular to a closed circulating water cooling system applied to an explosion-proof frequency converter in the coal industry. Background technique [0002] With the rapid development of my country's economy, the demand for energy is increasing. Coal plays a pivotal role in my country's energy structure. However, for a long time, my country's coal industry has generally had such a status quo: backward mining equipment, low degree of automation, This is also one of the reasons for the high accident rate in the coal industry. Therefore, it is imminent to speed up the development of the equipment manufacturing industry in the coal mining industry. As the core component of the explosion-proof inverter, its safety and reliability have always been the focus of research and development. As a high-power power electronic device, the explosion-proof inverter is in the process of operation. I...

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Problems solved by technology

First of all, the working place of the explosion-proof frequency converter is located in a mine, which is a dangerous place. The air contains a lot of dust and combustible gas, so the explosion-proof frequency converter adopts a flameproof design. Air cooling; secondly, with the increasing power of mining equipment, the heat flux density of the power consumption generated by the inverter is increasing, and air cooling cannot meet the demand. The closed circulating water cooling system can use water as the heat transfer medium , to discharge the power consumption heat generated during the operation of the inverter out of the explosion-proof cavity of the explosion-proof inverter

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