Direct-current circuit breaker cabinet with high safety

Abstract

The invention provides a direct-current circuit breaker cabinet with the high safety. With a handcart-carried circuit breaker, a sliding plate is driven by a lead screw to carry out micro adjustment on the circuit breaker, so that the circuit breaker is connected to a direct-current switch cabinet. Moreover, the lead screw is blocked by a linkage rod and a stopping plate. When a lock pin is locked, the linkage rod drives the stopping plate to move and, together with a protrusion arranged at the circuit breaker, carries out limiting. The lower end of the stopping plate is arranged in a slot ofthe lead screw and the stopping plate can not return if the lock pin is not turned on, so that the lead screw can not work; and the handcart and the circuit breaker are locked by mechanical linkage, so that the safety of the direct-current switch cabinet is improved and a problem that the lead screw can not be fixed simultaneously when the common handcart is locked is solved.

Description

technical field [0001] The invention relates to the field of DC switch cabinets, in particular to a DC circuit breaker cabinet with high safety performance. Background technique [0002] At present, my country's urban rail transit system is powered by DC system. However, most of its DC power supplies are provided by high-power silicon rectifier devices. Due to the low overload capacity of silicon rectifier device components, the requirements for DC power grid protection components are higher. Quickly analyze the important components in the rail transit of the DC special circuit breaker. At present, when the DC switchgear is used, the handcart is used to carry the circuit breaker in order to open and close the circuit breaker. Since the circuit breaker is moved by the handcart, there are strict requirements for the locking function of the handcart and the screw rod. Ensure that the circuit breaker cannot come out when the DC switchgear is working, otherwise it is easy to ca...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the purpose of the present invention is to provide a DC circuit breaker cabinet with high safety performance. The circuit breaker is carried by the handcart, and the sliding plate is driven by the screw to fine-tune the circuit breaker, so that the circuit breaker is connected to the DC switch cabinet. And the screw rod is blocked by the linkage rod and the blocking plate. When the lock pin is locked, the linkage rod drives the blocking plate to move and limit the position with the protrusion on the circuit breaker. The lower end of the blocking plate is located in the groove of the screw rod, and the locking pin It cannot return without opening the blocking plate, and the screw cannot work. The mechanical linkage locks the handcart and the circuit breaker, which improves the safety of the DC switchgear and solves the problem that the screw cannot be fixed at the same time when the ordinary handcart is locked.

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