An explosion-proof elevator door control safety isolation module

Abstract

The invention provides a door-control safety type isolation module of an anti-explosion elevator. The door-control safety type isolation module comprises a power supply voltage-stabilizing circuit, a direct-current alternating-current conversion circuit, a first direct-current alternating-current conversion circuit, a second direct-current alternating-current conversion circuit, an isolation transformer, an input energy-limiting circuit, a first optical coupler, a second optical coupler, a first signal conversion detecting circuit, a second signal conversion detecting circuit and a function safe output circuit; the isolation module further comprises a triode control circuit, wherein one end of the triode control circuit is connected to a low-voltage end of the energy limiting circuit, and the other end of the triode control circuit is connected to a cathode of the second optical coupler; an anode of the first optical coupler is connected to a high-voltage end of the input energy limiting circuit; and a cathode of the first optical coupler is connected to an anode of the second optical coupler. The door-control safety type isolation module provided by the invention can weaken influence, caused by environmental gas corrosion, to a door-control switch, so that maintenance cost of a client is greatly reduced.

Description

technical field [0001] The invention relates to an isolation module, in particular to an explosion-proof elevator door control safety isolation module. Background technique [0002] Today, when explosion-proof technology is widely used, the isolation module is an important link in the explosion-proof system, and the technology is becoming more and more mature. For example, the utility model patent CN201172564Y in the prior art discloses an explosion-proof elevator door control safety isolation module, which has an explosion-proof function and functional safety output at the same time, forming a special isolation that can not only be applied to explosion-proof elevators, safety doors and other explosion-proof equipment Modules can also be used in conjunction with safety equipment. However, there are some problems that need to be improved: (1) In industrial sites, especially petrochemical sites, the environment of the site is poor, and the elevator door control switch is easi...

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Problems solved by technology

[0003] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide an explosion-proof elevator door control safety isolation module, which is used to solve the problem that the contact resistance of the door control switch in the prior art becomes larger due to the influence of the environment, so that the optocoupler leads Unstable communication, high hardware cost in the isolation module, etc.

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