New type spraying robot positive pressure explosion-proof system

Abstract

The invention relates to an explosion-proof system, more particularly, to a new type spraying robot positive pressure explosion-proof system, comprising: a control system, a robot body, a combustible gas content detection device, a first pressure switch, a second pressure switch, a first two-position three-way direction changing valve, a second two-position three-way direction changing valve, a third two-position three-way direction changing valve, a proportion control valve and a flow switch. The control system is electrically connected with the robot body, the combustible gas content detection device, the first pressure switch, the second pressure switch, the first two-position three-way direction changing valve, the second two-position three-way direction changing valve, the third two-position three-way direction changing valve, the proportion control valve and the flow switch through control cables. According to the invention, a proportion valve and a gas controlled three-position five-way direction changing valve are used to realize the positive pressure explosion prevention of a spraying robot. When the spraying robot enters an operation mode and is electrified, the pressure flow closed loop control can be realized so as to reduce the unnecessary manual intervention or alarming and out-of-service of the spraying robot caused by the positive pressure fluctuation in the robot housing.

Description

technical field [0001] The invention relates to an explosion-proof system, in particular to a novel positive-pressure explosion-proof system for a spraying robot. Background technique [0002] The positive pressure explosion-proof system of the existing positive pressure ventilation type spraying robot cannot automatically adjust the flow rate of the ventilation gas at the gas outlet when the internal pressure changes, and can only be adjusted manually through the throttle valve at the front air inlet Intake flow. [0003] Some products have been improved. For example, a Chinese patent discloses a spraying robot explosion-proof device, application number: 201220104506.3, application date: 2012-03-20, including a sealed chamber, a positive pressure and flow pick-up system fixed inside the sealed chamber, located at The air compressor outside the sealed chamber is connected to the pressure reducing valve and the pneumatic conduit at the outlet of the air compressor, connected...

AI Technical Summary

Problems solved by technology

[0004] The above technical solution mainly performs explosion-proof protection by adjusting the gas in the sealed cavity. Its shortcoming is that it only controls the positive pressure in the sealed cavity and cannot control the automatic adjustment of the positive pressure inside the shell of the spraying robot.

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