Patent ID: 7456753

Claim:
An internal pressure explosion-proof system, comprising: an internal pressure explosion-proof mechanism to be installed in a hazardous atmospher, the internal pressure explosion-proof mechnainsm having an internal pressure chamber to which inactive-gas/air is supplied; a control apparatus to be installed in a non-hazardous atmosphere to control the internal pressure explosion-proof mechanism; an inactive-gas/air supplying portion configured to supply inactive-gas/air to the internal pressure explosion-proof mechanism; an inactive-gas/air discharging portion configured to release the inactive-gas/air discharged from the internal pressure explosion-proof mechanism; a high-pressure abnormality detector configured to send a signal to the control apparatus when an internal pressure of the internal pressure explosion-proof mechanism becomes higher than a predetermined pressure; and an alarm configured to give warning when the signal of the high-pressure abnormality of the high-pressure abnormality detector is received, wherein the control apparatus makes the alarm generate warning and also makes the inactive-gas/air discharging portion release inactive-gas/air in the internal pressure explosion-proof mechanism when the control apparatus receives the signal of the high-pressure abnormality from the high-pressure abnormality detector, and wherein the internal pressure explosion-proof mechanism is a robot.