Anti-explosion and ventilation control system of pneumatic control motor

Abstract

The invention relates to an anti-explosion and ventilation control system of a pneumatic control motor. A pneumatic control loop module is connected with an air source, and the pneumatic control loop module is provided with a high flow rate purging pattern, a leakage compensation pattern and a small-flow rate purging pattern, and is communicated with the air inlet of an motor shell; a pressure relief valve module is connected with the pneumatic control loop module, and the pressure relief valve module has the function of opening or closing the vented exhaust port of the motor shell; an anti-explosion junction box is internally provided with a junction terminal which is used for alarming and also used in an interlock circuit, and the junction terminal is connected with an anti-explosion alarm / supercharge switch and a motor interlocking switch which are positioned in the pneumatic control loop module through anti-explosion cables. According to the invention, pneumatic elements are adopted, the defects existing in the ventilation control system of the traditional motor are overcome, and the design and manufacture costs of the system are lowered on the basis of ventilation and leakage compensation of the motor under inflammable and explosive dangerous environments.

Description

technical field [0001] The invention relates to a motor ventilation control system, in particular to an air-controlled motor explosion-proof ventilation control system in which all components of the system use pneumatic components. Background technique [0002] According to IEC standards or relevant national standards, to enable electrical equipment to be used normally in flammable, explosive and other hazardous environments, electrical equipment can adopt the following different types: flameproof type, increased safety type, intrinsically safe type, positive pressure type, Oil-filled type, sand-filled type, potted type, etc. For motors working in flammable and explosive environments such as flammable gas, water vapor or dust, the positive pressure type can be used to ensure the safe operation of the motor. The so-called "positive pressure" refers to the introduction of protective gas such as compressed air or inert gas into the motor casing, so that the pressure inside the...

AI Technical Summary

Problems solved by technology

The traditional motor ventilation control system is usually assembled by electrical components, because the electrical components are easy to generate electric sparks during work, which is easy to have adverse effects on the equipment

In addition, if the electrical components adopt an explosion-proof design, it will undoubtedly greatly increase the design and manufacturing costs of the system.

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