Flexible brake control circuit of crown block brake

• Main Authors: XIAO XIANGTAO, OUYANG ZHENHUA, ZHANG JUEMIAO, ZHAO QINGXIANG
• Format: Patent
• Language: Chinese; English
• Published: 14.10.2022
• Subjects: BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

According to the flexible braking control circuit of the crown block brake, the in-phase input end A of a numerical value comparator A1 in a frequency converter is connected with the actual frequency of the frequency converter, the inverted input end B of the numerical value comparator A1 is connected with the manually set comparison frequency, and the high level or low level output by the numerical value comparator A1 is connected to digital quantity output ports DO and COM of the frequency converter. A normally open contact between the DO and the COM is used for controlling a coil of a power-off delay relay KT; a normally open contact which is electrified to be closed and opened in a delayed manner of the KT is connected with a coil of an intermediate relay KA; and the cart walking positive and negative rotation control relays KAz and KAf are connected in parallel with a normally open contact of the KA so as to control a coil of the brake contactor KM. The brake can be prevented from being closed when a car