43results about How to "Close performance stable" patented technology

The invention belongs to the field of power distribution devices and specifically discloses a complete power distribution device, comprising a cabinet frame and a bus bar compartment, a cable compartment, a circuit breaker compartment and a control compartment, which are disposed in the cabinet frame and formed by metal partition boards. The circuit breaker compartment is provided with a built-incircuit breaker, and the circuit breaker is equipped with an axially fixedly connected vacuum bubble, an insulating cylinder, an electromagnetic actuator and an anti-ballistic device. The anti-ballistic device comprises a cylinder body and a piston built in the cylinder body; the side wall of the cylinder body is provided with a drainage device, a damping device and a drainage hole for connectingthe drainage device, the damping device and a rodless cavity. When the power distribution device is switched on, the anti-ballistic device absorbs part of the energy of a moving contact of the circuitbreaker before switch-on, and the piston acts to the drainage device to trigger the drainage device to drain, and the driving force for driving the moving contact to reversely bounce after being switched on is eliminated; the damping device allows a damping medium to flow into a rod cavity only through a damping hole in the piston, and the anti-ballistic device absorbs the energy of reverse bounce of the moving contact, thereby effectively suppressing the occurrence of switch-on bounce of the moving contact and avoiding the occurrence of switch-on bounce arcing.

The invention provides an arc extinguish chamber and a circuit breaker employing the same. The circuit breaker comprises the arc extinguish chamber and an operating mechanism, wherein the arc extinguish chamber comprises a first contact and a second contact; the second contact is provided with a moving end conducting rod; the operating mechanism is in direct transmission connection with the moving end conducting rod; and the first contact is a floating contact arranged through an elastic part. The arc extinguish chamber and the circuit breaker have the beneficial effects that the operating mechanism is in direct transmission connection with the moving end conducting rod, so that an insulated pull rod can be omitted; the weight of a moving component is reduced; and improvement of the breaking-closing speed is facilitated. The first contact is the floating contact, so that the second contact can push the first contact to further move a distance after being closed; certain bonding pressure can be kept between the two contacts after the elastic part is compressed; good closing performance is ensured; the influence on the closing performance since an overrun spring cannot be arranged after the insulated pull rod is directly removed is avoided; meanwhile, the second contact can obtain breaking initial kinetic energy through the elastic part; and the breaking speed is improved.

A coal storage silo feeding device comprises automatic air locking funnel devices 3 arranged on the top of a silo and a sealed spiral feeding device body 5. The automatic air locking funnel devices are arranged on the two sides of a conveying belt for conveying materials to the coal storage silo, and the sealed spiral feeding device body of the coal storage silo feeding device is arranged below a roller end of the conveying belt for conveying materials to the top of the coal storage silo. The feeding device has the functions of protecting the materials in the silo and sealing the silo at the same time, and air in the silo can be discharged through the feeding device.

The invention belongs to the field of switch cabinets, and particularly discloses a medium and high voltage switch cabinet, comprising a cable compartment, a busbar compartment, a circuit breaker compartment and a control compartment. A circuit breaker, an incoming line contact box and an outgoing line contact box are built in the circuit breaker compartment. A switch-on and switch-off mechanism is built in the circuit breaker, and the switch-on and switch-off is composed of an anti-bounce device, an electromagnetic driver, an insulating cylinder and a vacuum bubble, which are fixedly connected with each other on the axial direction. A piston of the anti-bounce device is provided with a damping hole, and an electric drainage device and a current blocking device, which communicate with eachother, the electric drainage device is triggered to perform electric drainage during switch-on to eliminate the promotion force of switch-on bounce of a moving contact of the circuit breaker, and thecurrent blocking device ensures that a damping medium flowing through the electric drainage device can only flow to a rodless cavity, so that the anti-bounce device absorbs the energy of the reversebounce of the moving contact. The anti-bounce device absorbs a part of energy during the switch-on of the moving contact of the circuit breaker, eliminates the promotion force for prompting the switch-on bounce and absorbs the bounce energy of the moving contact, so as to suppress the switch-on bounce of the moving contact of the circuit breaker, thereby avoiding the occurrence of switch-on bouncearcing.

The invention discloses an operating mechanism used for a three-station switch. The operating mechanism comprises partition plates, an output main shaft, a drive mechanism and a limiting mechanism, wherein the drive mechanism controls rotation of the output main shaft so that an output shaft connecting lever on the output main shaft can swing between the isolation station, the grounding station and the switch-on station, the drive mechanism comprises an operating main shaft, a grounding main shaft and a switch-on main shaft, and the operating main shaft drives the grounding main shaft and the switch-on main shaft so as to drive the output main shaft to rotate to the grounding position and the switch-on position. One end of the grounding main shaft and one end of the switch-on main shaft are respectively provided with a connecting lever and a spring, wherein the connecting levers and the springs can drive the output main shaft to rotate rapidly, and the limiting mechanism locks the output shaft connecting lever located in the isolation station or the grounding station or the switch-on station. The operating mechanism used for the three-station switch has good switching-on performance, the output main shaft can be accurately limited in the isolation position or the grounding position or the switch-on position, abrasion among all parts can be reduced, and the mechanical service life of limiting parts can be prolonged to the maximum.