Blast-proof and anti-falling protector used in hazardous environment

Abstract

The invention discloses a blast-proof and anti-falling protector used in the hazardous environment. The protector comprises a conical casing of which the inner cavity is invertedly conical, and a conical iron core of which the external wall is arranged in the conical casing in an inverted conical shaped; nuts surrounding the conical iron core and belleville springs which are butted between the nuts and the inner cavity of the conical casing are arranged at the top end of the conical casing; a diode safety barrier is arranged on the conical casing; the nonessential safety end of the diode safety barrier is connected with a motive power source, and the essential safety end of the diode safety barrier is connected with a safety switch; a centrifugal block base and a centrifugal block which is arranged in the centrifugal block base and is fixed by a spring pressing sheet are arranged at the bottom of the conical iron core. According to the diode safety barrier, the safety switch s connected with the motive power source in series by the diode safety barrier, so that a non-energy-limited circuit does not affect an energy-limited circuit, the effect of isolating the non-energy-limited circuit from explosive substances can be realized, the blast-proof performance of the protector can be effectively guaranteed, and the risk of working in the potentially explosive atmospheres can be reduced. The blast-proof and anti-falling protector is used for the field of blast-proof protectors.

Description

technical field [0001] The invention relates to the field of explosion-proof safety devices, in particular to an explosion-proof and drop-proof safety device used in dangerous environments. Background technique [0002] The basic principle of the current construction hoist gear cone drum-shaped progressive anti-falling safety device is to drive the conical iron core through the centrifugal block, so that friction occurs between the conical iron core and the conical shell until the cage stops moving. At the same time of the braking process, the safety switch acts to cut off the power supply of the driving device. [0003] When the safety fall arrester of this structure is running at high speed, friction sparks will be generated between the outer surface of the conical iron core and the inner surface of the conical shell, and friction sparks will be generated when the centrifugal block collides with the inner surface of the conical iron core. Electrical sparks will be generat...

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Problems solved by technology

[0003] When the safety fall arrester of this structure is running at high speed, friction sparks will be generated between the outer surface of the conical iron core and the inner surface of the conical shell, and friction sparks will be generated when the centrifugal block collides with the inner surface of the conical iron core. Electrical sparks will be generated, and the temperature of the outer surface of the conical shell will rise sharply due to internal friction. Due to the above conditions, this type of anti-fall safety device cannot meet the requirements of explosion-proof performance

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