Intrinsically-safe circuit used for electronic detonator and time delay device used for electronic detonator

Abstract

The invention provides an intrinsically-safe circuit used for an electronic detonator and a time delay device used for the electronic detonator. By means of the intrinsically-safe circuit used for the electronic detonator and the time delay device used for the electronic detonator, potential production safety hazards, which possibly exist in coal mine operation, of the electronic detonator can be eliminated, so that the safety coefficient is high. The intrinsically-safe circuit comprises a current limiting module, a transient suppression module, a rectifier module, a blocking module and a receiving and transmitting auxiliary module which are electrically connected, wherein input ends of the current limiting module are connected with detonator leg wires, and the current limiting module is used for limiting the magnitude of current; an input end of the transient suppression module is connected with an output end of the current limiting module, and the transient suppression module is used for preventing surge pulses; an input end of the rectifier module is connected with an output end of the transient suppression module, and the rectifier module is used for converting alternating current into direct current; an input end of the blocking module is connected with an output end of the rectifier module, and the blocking module is used for preventing an energy storage module at a control end of the electronic detonator from discharging electricity to the detonator leg wires; and the receiving and transmitting auxiliary module is connected with an output end of the blocking module, and is used for clamping output signals.

Description

technical field [0001] The invention relates to the technical field of detonator blasting, in particular to an intrinsically safe circuit and a delay device for an electronic detonator. Background technique [0002] According to the provisions of GB3836.4-2010, intrinsically safe circuits refer to circuits that cannot ignite specified explosive gas mixtures under specified test conditions under normal operation or under specified fault conditions. The safest, because it will not detonate even in a fault state, that is, it is "essentially" safe, so it is called intrinsically safe, or intrinsically safe for short. [0003] In special industries such as coal mines or mines, it is required that the entire product must not have the risk of ignition due to high temperature or sparks under any circumstances. The current permitted electric detonators used in coal mines have the problem of detonator loss, which poses serious social security risks. The country Management agencies hav...

AI Technical Summary

Problems solved by technology

[0003] In special industries such as coal mines or mines, it is required that the entire product must not have the risk of ignition due to high temperature or sparks under any circumstances. The current permitted electric detonators used in coal mines have the problem of detonator loss, which poses serious social security risks. The country The management agency adopts various means to prevent the occurrence of such incidents. The most effective measure is to fully promote electronic detonators to replace ordinary detonators.

However, ordinary electronic detonators have not yet passed the coal safety certification, and there are huge hidden dangers in production safety when used in underground coal mines and inflammable and explosive gas environments, and cannot meet the requirements of intrinsic safety. Therefore, electronic delay detonators have not yet been widely used in underground blasting operations. Therefore, the development of electronic detonators that meet the requirements of intrinsic safety is an urgent need in the promotion process of electronic detonators.

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