Positive pressure type explosion-proof control cabinet

Abstract

The invention provides a positive pressure type explosion-proof control cabinet and relates to the technical field of explosion-proof devices. The control cabinet is composed of a cabinet body, a maincavity element component, explosion-proof electromagnetic valves, throttle valves and pressure switches. The main cabinet body of the cabinet body is composed of an electrical cavity, an electrical cavity cabinet door, a wiring cavity and a wiring cavity door. An element component is arranged in the electrical cavity. An indicator light group and a button group are arranged on the electrical cavity cabinet door. An auxiliary box body door is arranged on the auxiliary cabinet body of the cabinet body. The inlet end of the cabinet body is connected with the explosion-proof electromagnetic valveI, the multi-stage oil-water filter and a throttle valve I in turn. The drainage end of the cabinet body is connected with the throttle valve II and the explosion-proof electromagnetic valve II in turn. The pressure switch I, the pressure switch II, the pressure switch III and a pressure gauge are connected with the pipeline of the cabinet body. An explosion-proof control box is in circuit connection with the throttle valve I, the throttle valve II, the indicator light group and the button group. According to the invention, the control cabinet has a wide application range; due to the passivity and stability of an inert gas, the inert gas is filled into the control cabinet; the internal pressure of the cabinet body is always greater than the atmospheric pressure; and the electrical operation in the control cabinet is ensured.

Description

technical field [0001] The invention relates to the technical field of explosion-proof equipment, in particular to a positive pressure type explosion-proof control cabinet. Background technique [0002] In petrochemical and other production enterprises, the content of volatile gases such as flammable and explosive in the working environment is relatively high. Once these gases come into contact with sparks, flash explosion accidents are likely to occur. Therefore, try to avoid placing equipment that will generate sparks in the production workshop. However, due to Production requires that some control cabinets must be installed in these hazardous areas of explosive gas atmospheres, and the existing explosion-proof equipment is mostly of increased safety type. It is suitable for equipment that generates sparks or arcs under normal operation, so an explosion-proof control box suitable for a wide range of applications and explosive gas atmospheres is required. Contents of the ...

AI Technical Summary

Problems solved by technology

[0002] In petrochemical and other production enterprises, the content of volatile gases such as flammable and explosive in the working environment is relatively high. Once these gases come into contact with sparks, flash explosion accidents are likely to occur. Therefore, try to avoid placing equipment that will generate sparks in the production workshop. However, due to Production requires that some control cabinets must be installed in these hazardous areas of explosive gas atmospheres, and the existing explosion-proof equipment is mostly of increased safety type. Applicable to equipment that generates sparks or arcs during normal operation, so an explosion-proof control box suitable for a wide range of applications and explosive gas atmospheres is required

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