3results about How to "Strong breaking ability" patented technology

The application relates to a bidirectional direct-current circuit breaker, a rated breaking method and a short-circuit breaking method, and belongs to the technical field of fault protection of a direct-current medium-high voltage power system. The bidirectional direct-current circuit breaker comprises a parallel main switch branch, a voltage-limiting energy-dissipating branch and a coupling commutation shutdown branch. The bidirectional direct-current circuit breaker provided by the application can realize breaking of different currents of the system under different operating conditions, such as a rated condition or a short-circuit condition, by controlling conduction of thyristors in the coupling commutation shutdown branch, only one set of pulse discharge circuit is used, current transfer and reliable shutdown of a large-capacity direct-current system under a high-current change rate short-circuit condition can be realized at the same time, and the bidirectional direct-current circuit breaker has the advantages of small size, strong breaking capacity, convenient control and reclosing function under a short-circuit fault condition.

The utility model provides a material scattering mechanism of a mica roasting kiln, and belongs to the technical field of mica processing and production. The technical problems of material blockage or insufficient scattering and the like in the prior art are solved. The material scattering mechanism of the mica roasting kiln comprises a scattering roller which is arranged above a metal conveying belt and located between a pre-drying area and a roasting area, the scattering roller is provided with a scattering structure distributed in the length direction of the scattering roller, and the two ends of the scattering roller are located on the two sides of the metal conveying belt respectively. A height adjusting mechanism capable of adjusting the height of a mica passing gap between the scattering roller and the metal conveying belt is arranged at the end part of each scattering roller, and one end of each scattering roller is connected with a rotary driver. The device has the advantages of good scattering effect, high applicability, good stability and the like.

The embodiment of the invention provides a miniature circuit breaker, and the circuit breaker comprises a tripping mechanism which comprises a moving contact support, moving contacts, a first actuating input part and a second actuating input part, and the first actuating input part and the second actuating input part are used for driving the moving contact support to move, so as to enable at least one moving contact to be separated from a corresponding fixed contact; the magnetic tripping assembly comprises a coil and an actuating part, and when the main loop current passing through the miniature circuit breaker is larger than a first preset short-circuit current threshold value, the actuating part acts under the action of an electromagnetic field generated by the coil so as to apply external force to the first actuating input part; the electronic release comprises a current sensor, a controller and an action actuator, the controller is configured to respond to the situation that the main loop current measured by the current sensor is larger than a preset overload current threshold value and smaller than a second preset short-circuit current threshold value, and the action actuator is controlled to apply external force to the second actuating input part; wherein the first preset short-circuit current threshold value is greater than the second preset short-circuit current threshold value.