34results about How to "Improve arc extinguishing efficiency" patented technology

The invention provides a breaker provided with an arc extinguishing mechanism with magnetic blowing and air-blowing functions, and mainly aims at solving the problems of poor breaking capacity and poor arc extinguishing effect due to the fact that the arc extinguishing mechanism of the breaker only has the magnetic blowing function or the air-blowing function. The breaker is characterized by also comprising a magnetic blowing device (4) and a gas production plate (5), wherein the magnetic blowing device (4) and the gas production plate (5) are correspondingly arranged between a static contact (22) and an arc extinguish chamber (3) and are used for guiding an electric arc generated when a moving contact (21) is separated from the static contact (22) to the arc extinguish chamber (3). According to the breaker provided with the arc extinguishing mechanism with the magnetic blowing and air-blowing functions provided by the invention, a magnetic blowing mechanism and the gas production plate are also arranged between the static contact and the arc extinguish chamber; and the electric arc generated when the moving contact is separated from the static contact is guided to the arc extinguish chamber, so that the arc extinguishing efficiency is improved; and the breaking capacity is relatively high.

The invention discloses a circuit breaker arc-extinguishing chamber which comprises a fixing plate and a plurality of arc chutes. The fixing plate comprises a bottom plate and two side plates symmetrically disposed at two opposite ends of the bottom plate. A plurality of exhaust passages are uniformly distributed on the bottom plate in the length direction of the bottom plate. A plurality of groups of fixing mechanisms are uniformly distributed on the side plates along the length direction of the side plates. The exhaust passages and the fixing mechanisms are successively staggered. The fixingmechanism includes a plurality of fixing holes uniformly distributed along the width direction of the side plate. The two opposite side ends of each arc chute are provided with fixed right angles recessed inward. Each fixed right angle is provided with a fixing block matching the fixing hole at a position corresponding to the fixing hole. One end of each fixing block penetrates through the corresponding fixing hole. The circuit breaker arc-extinguishing chamber is reasonable in structural design, good in impact resistance effect, good in heat dissipation effect, can improve arc extinguishingefficiency, and can improve the working stability of the circuit breaker when used.

The invention relates to a self-energy arc extinguishing chamber and a circuit breaker employing the same. The self-energy arc extinguishing chamber comprises a shell, wherein a piston cylinder barreland a piston cylinder bottom are arranged in the shell, a piston structure is arranged in the piston cylinder barrel and the piston cylinder bottom and moves in reciprocating way in response to breaking and closing operation of the arc extinguishing chamber, the piston structure, the piston cylinder barrel and the piston cylinder bottom form an air press chamber, a movable arc contact, a nozzle and an expansion chamber are arranged on the piston structure, the expansion chamber is corresponding to the movable arc contact and the nozzle, a pressure relief valve structure is arranged on the airpress chamber and is used for reducing pressure when the arc extinguishing chamber is broken, an air supplement passage is arranged on the air press chamber, and an air supplement valve structure isarranged on the air supplement passage and is opened to supplement air to the air press chamber when the arc extinguishing chamber is closed. The internal pressure of the air press chamber is abruptlyreduced during closing operation of the circuit breaker, the air supplement valve structure is opened, external sulfur hexafluoride gas rapidly enters the air press chamber through the air supplementpassage, the closing and air supplement operation is completed, the internal and external pressure difference is balanced, the closing resistance is effectively reduced, and the closing operation work is reduced.

The invention relates to the technical field of fuses, and discloses a fuse for a power distribution system. The fuse comprises an insulating part, a lower static contact is fixedly connected to the bottom end of one side of the insulating part, a lower moving contact is movably clamped to one side of the lower static contact, and a fusion tube is fixedly connected to the top end of the lower moving contact. A fuse wire assembly is movably connected in the fusion tube, the top end of the fuse wire assembly is in threaded connection with an upper moving contact, a support is fixedly connected to the top end of one side of the insulating part, an auxiliary hook is fixedly connected to the bottom end of one side of the support, and a contact spring is fixedly connected to one side of the support. The bottom end of the contact spring is fixedly connected with an abutting sheet, and the middle part of the inner side of the fusion tube is fixedly connected with an elastic plate. High pressure is formed through high temperature generated by fusing of the fuse assembly and gas generated by decomposition of the fuse assembly, so that the led-out insulating oil is heated to be decomposed and blown to the direction perpendicular to the electric arc, transverse blowing and longitudinal blowing can be combined, and the arc extinguishing efficiency is improved.

The invention relates to a circuit breaker, and particularly relates to an improvement of an arc extinguishing system of the circuit breaker. The circuit breaker comprises a contact system, wherein the contact system comprises a moving contact and a static contact, a magnetism increasing assembly is arranged around the moving contact, and the magnetism increasing assembly is encircled to form a magnetism increasing space which approximately surrounds the static contact and the moving contact. Through reasonable arrangement of the magnetism increasing assembly, the moving contact and an arc running channel, the arc running speed of the arc is increased, the arc extinguishing efficiency is improved, the arc is fully extinguished by an arc extinguishing grid pieces, and meanwhile, the arc jumps to the arc running channel from the moving contact as soon as the moving contact is repelled, so that the situation that the moving contact is continuously ablated and the electrical service life is affected is prevented.

The invention discloses a high-breaking miniature circuit breaker, which comprises a handle structure, a tripping assembly, a contact structure and a driving structure which are arranged in a shell, wherein the tripping assembly comprises a rotating wheel rotatably arranged in the shell, the driving structure comprises a driving plate rotatably abutted between the rotating wheel and a moving contact component, and locking plates respectively arranged on the rotating path of the driving plate and the rotating path of the rotating wheel, the driving plate and the locking plates form locking matching in the switching-on rotating process, and the rotating wheel drives the locking plates and the driving plate to release the locking matching, so that the moving contact component is in instant contact with the static contact. According to the invention, the miniature circuit breaker adopting the technical scheme has the characteristics of quickly switching on and switching off a circuit, reducing the fusion welding risk of the contacts, being beneficial to shortening the arc extinguishing time between the moving contact and the static contact, reducing the electric corrosion to the contacts and prolonging the electrical service life, being capable of bearing high voltage compared with a traditional circuit breaker, being capable of well meeting the use requirements of a high-voltage circuit, and reducing the setting cost.

The invention relates to the technical field of overvoltage protection devices, in particular to a method for improving the arc extinguishing efficiency of a multi-cavity structure by using a magnetic field, which can improve the performance of the multi-cavity arc extinguishing structure. According to the method for improving the arc extinguishing efficiency of the multi-cavity structure by using the magnetic field, when the multi-cavity structure is broken down to generate the arc, movement of the arc plasma in the structure can be further accelerated, the arc ejection and extinguishing time is shortened, and the arc extinguishing efficiency is improved. A non-constant magnetic field is arranged on the basis of an original chamber structure, the magnetic induction intensity of the magnetic field is 0.15 T, and the direction of the magnetic field is perpendicular to the central axis between electrodes in an arc extinguishing chamber unit and the central axis of a chamber nozzle. Through the magnetic field, on the basis of pneumatic pressure acceleration, the electric arc plasma is subjected to Lorentz force in the direction of the nozzle, the movement of the electric arc plasma is accelerated, the electric arc spraying and extinguishing time is shortened, and therefore the arc extinguishing efficiency of the multi-cavity structure is improved.

The invention discloses an arc extinguishing type switch device which comprises an insulating shell, a threaded cover and a wiring cylinder, the top of the insulating shell is sleeved with the threaded cover in a threaded mode, a threaded ring is fixed to the middle of the threaded cover in a penetrating mode, a connecting rod penetrates through the middle of the threaded ring in a threaded mode, and a plurality of stirring blades are fixedly installed on the surface of the middle of the connecting rod. The bottom of the connecting rod is sleeved with a rubber disc in a threaded mode. Two wiring cylinders are fixed to the side face of the insulating shell in a penetrating mode, a conducting rod is embedded into one end of each wiring cylinder in a threaded mode, the bottom of the inner wall of the insulating shell extends inwards to form a lining ring, and the bottom of the insulating shell is sleeved with a mounting cylinder in a threaded mode. The insulating shell is filled with conducting media with uncertain shapes and transformer oil, and the liquid level of the conducting media can ascend and descend to immerse the two conducting rods to be connected. The liquid level of the conducting medium rises to immerse the end parts of the two conducting rods, so that the two conducting rods form a current loop, and stable wiring of the two conducting rods can be ensured through a fixed and liquid connection mode.

The invention discloses a double-backflushing compression combined arc extinguishing lightning protection device, which comprises a semi-closed hollow cylinder with an opening in the upper end, wherein an upper backflushing pipeline (12), a middle compression arc extinguishing pipeline (13) and a lower backflushing pipeline (14) are sequentially arranged in the semi-closed hollow cylinder from topto bottom, the bottom of the upper backflushing pipeline (12) and the top of the lower backflushing pipeline (14) are each provided with a lightning arrester (1), a plurality of compression pipes (2)are arranged in the middle compression arc extinguishing pipeline (13), and a through hole is formed in the pipe wall of the bottom of the lower backflushing pipeline (14). According to the invention, the whole device is connected to the two ends of an insulator in parallel, and the breakdown voltage of the protected insulator string is greater than that of the parallel gap, so that the parallelgap is broken down preferentially when the power transmission line is struck by lightning, and flashover of the insulator is avoided.

The present invention provides a breaker and a distribution system. The breaker comprises a contact mechanism, an electromagnetic trip mechanism and an arc extinction mechanism. The contact mechanism can break off the fault current in a circuit; the electromagnetic trip mechanism comprises a static iron core, a movable iron core and a coil, the coil is arranged to generate an electromagnetic field when fault current is received to allow the static iron core to drive the movable iron core to perform motion along the axial direction to generate thrust for prompting the contact mechanism to release; the arc extinction mechanism is configured to cut off the arc generated when the contact mechanism breaks off the fault current, wherein the electromagnetic trip mechanism and the arc extinction mechanism are arranged at the same side of the contact mechanism, the electromagnetic trip mechanism is arranged in an inclination mode relative to the arc extinction mechanism to allow the distance between the end portion, far away from the contact mechanism, of the electromagnetic trip mechanism and the arc extinction mechanism to be larger than the distance between the end, close to the contact mechanism, of the electromagnetic trip mechanism and the arc extinction mechanism. The installation space of the arc extinction mechanism of the breaker is increased, and the breaking capacity of the breaker is improved.

The invention provides a contact direct-acting molded case circuit breaker, which comprises a shell, and an input terminal, an output terminal, a static contact, a moving contact, a magnetism tripping mechanism, a thermal tripping mechanism and the like located in the shell, wherein the static contact is connected with the input terminal; a handle is connected with a moving contact driving mechanism; the moving contact is connected with the moving contact driving mechanism and is connected with the output terminal through the magnetism tripping mechanism and the thermal tripping mechanism; and the magnetism tripping mechanism and the thermal tripping mechanism are matched with the moving contact driving mechanism for use. The contact direct-acting molded case circuit breaker is characterized in that a sliding way is arranged on the moving contact driving mechanism; the moving contact can move along the linear sliding way; and the static contact is located on the extending line of the sliding way. The contact direct-acting molded case circuit breaker has the beneficial effects that a rotation swinging movement mode is changed to a linear movement mode for the moving contact, direct strike of the moving contact enables generated arcs to be directly in an arc extinguishing sheet direction, the arc extinguishing efficiency can be greatly improved, and the breaking capacity of the switch is improved.

The invention discloses a high-power high-voltage direct-current contactor. The high-power high-voltage direct-current contactor comprises a base, a shell and an arc extinguishing cover, the arc extinguishing cover is clamped on the base, and the base and the arc extinguishing cover form an arc extinguishing cavity. A fixed contact and a moving contact are arranged in the arc extinguishing cavity,the fixed contact is fixedly arranged on the arc extinguishing cover, and the cross section of the moving contact is an equilateral trapezoid. The small end of the moving contact is opposite to the fixed contact, and the large end of the moving contact is fixedly arranged on a moving contact iron. The moving contact iron is arranged to be of a three-dimensional structure, and the electric arcs generated by the moving contact and the static contact are lengthened, so that the arc extinguishing efficiency is improved, and the arc extinguishing effect is improved. The magnetic steel is arrangedbetween the moving contacts and at the two sides of the moving contacts, so that an effective magnetic field is increased, and the rapid arc extinguishing can be achieved. Through the reinforcing connecting rod arranged on a take-up frame and the buckle arranged on the base, the explosion-proof protection is carried out on the arc extinguishing cover, and therefore the potential safety hazards arereduced.

The invention relates to a circuit breaker with an arc extinguishing effect. The circuit breaker comprises a shell, a moving contact, a fixed contact and an arc extinguishing chamber arranged in the shell, wherein the arc extinguishing chamber comprises an insulating box body and metal grid plates; a through groove for moving the moving contact up and down is reserved in each metal grid plate; thefixed contact is located at the lower part of the through groove; the edge parts of the metal grid plates are connected with the insulating box body; the metal grid plates are of a stepped structure;the thickness of a far end, relative to the fixed contact, of each metal grid plate is greater than that of a near end; a plurality of bumps are arranged on the surfaces of the metal grid plates; andthe bumps on the adjacent metal grid plates are oppositely arranged. The circuit breaker is provided with the arc extinguishing chamber, so that the circuit breaker can play a quick arc extinguishingrole in arcs and the service life of the circuit breaker is prolonged.