72results about How to "Small operating power" patented technology

The invention discloses an arc-control device of a breaker, which comprises a piston rod, a piston, an air cylinder, a static contact, a moving contact and a nozzle, wherein the air cylinder is isolated by the piston to form a hot air chamber and a cold air chamber, the piston is sleeved at the periphery of the piston rod and is positioned between a first limiting surface and a second limiting surface of the piston rod, and the nozzle is provided with a first air channel and a second air channel which are respectively communicated with the hot air chamber and the cold air chamber. According to the invention, hot airflow of arc heating can enter the hot air chamber, and in arc blowout, the cold airflow in the cold chamber can blow away conductive particles, so that the phenomenon that in the traditional structure, the cutting-off is not successful due to heat breakdown and air bubbles of the airflow can be avoided; the mode of forming the pressure by pressure air of the piston and the mode of forming the pressure by arc heating expansion are integrated, so that the size of the arc-control device is reduced; through the limiting surfaces of the piston rod, the drive mode of the piston can automatically adapt to the magnitude of current; and the expansion pressure generated by arc drives the direction of the movement of the piston to be constant with the direction of the movement of the piston rod, so that the work of the breaker can be reduced.

The invention provides a dual-moving contact transmission device of a circuit breaker. The device has advantages of fast relative speed of contacts, low operation power of the mechanism, and low product cost. The dual-moving contact transmission device comprises a first connecting terminal and a second connecting terminal, a first contact assembly, a second arc contact, and a reversed transmission unit, wherein the first connecting terminal and the second connecting terminal are arranged coaxially. The first contact assembly includes a first pull rod, an air cylinder, a first arc contact, a nozzle, and a second pull rod, wherein the units are connected successively into one; one end of the reversed transmission unit is connected with the second pull rod and the other end is connected with a driving terminal of the second arc contact; the first pull rod is used for power inputting; and the reversed transmission unit is used for transmitting the motion and the force of the first pull rod to the second arc contact in parallel in a reversed manner. The horizontal motion of one pull rod is converted into horizontal motions of the two arc contacts. And the two arc contacts carry out opening or closing simultaneously, so that the relative speeds of the moving and static arc contacts increase and the operation power of the mechanism is reduced obviously.

The operating and driving mechanism applied to the driving mechanism in the breaker and switch disconnector etc. equipment includes following structure. The armature is fixed on the driving rod. The coil for detaching breaker (some time it can be left out), the permanent magnet, the pole shoes, the closing coil and the static iron core are set up around the circumference of the armature. The upper and the lower ends of the driving rod pass through the upper and the lower axial sleeves, which are inserted into the top end cover and the bottom end cover. There is the asistance mat slice on the bottom end cover. The top end cover is in the basin-typed structure. The static iron core, the top and the bottom end covers as well as the pole shoes can be made as the integrated piece.

The invention relates to a hydraulic operating mechanism for a high pressure switch and a hydraulic working cylinder of the hydraulic operating mechanism. The hydraulic working cylinder comprises a cylinder body which is provided with an inner cavity and a main piston which is assembled into the inner cavity of the cylinder body in a sealing sliding mode; an auxiliary piston independent to the piston rod is assembled in a rod cavity of the cylinder body along the left direction and the right direction in a sliding mode; the area difference exists between the total area of a left-side pressure acting surface, which is leftward and acted by hydraulic oil, of the auxiliary piston and the total area of a right-side pressure acting surface, which is rightward and acted by the hydraulic oil, of the auxiliary piston, and a left limiting structure and a right limiting structure for stopping the auxiliary piston at a left limiting part and a right limiting part in the motion stroke of the auxiliary piston are arranged in the rod cavity corresponding to the motion stroke set by the auxiliary piston. The hydraulic working cylinder provided by the invention reduces the acceleration after the motion speed of the piston rod meets the requirement; the hydraulic operating mechanism using the hydraulic working cylinder is further provided.

The invention embodiment discloses a double-action type linkage mechanism for a circuit breaker, which includes a first linkage mechanism and a second linkage mechanism with the same structure, wherein any one linkage mechanism comprises: a first insulated pull rod, a first connecting plate, a crank, a support and a second insulated pull rod. The first insulated pull rod is connected with a first contact of the circuit breaker. One end of the first connecting plate is connected on a first insulated pull rod by a first pin and the other end is connected with one end of the crank by a second pin. The other end of the crank is connected with the other end of the second insulated pull rod one end of which is connected with the second contact of the circuit breaker, and the middle portion of the crank is connected with one end of the support by a third pin. The other end of the support is fixedly connected on an arc extinguish chamber shell of the circuit breaker. The invention embodiment greatly reduces the operation work of the extra-high voltage circuit breaker and successes to run with power in an extra-high voltage AC experiment demonstration project.

The invention discloses a three-phase AC (Alternating Current) high-voltage vacuum contactor with a long service life, which can achieve 24kV voltage class and meet the requirements on one million-time mechanical life of a contactor. The three-phase AC high-voltage vacuum contactor with the long service life comprises a vacuum arc extinguish chamber arranged in an up-and-down structure, a soft connector, an insulating pull rod and a brake separating spring. A casing of the vacuum arc extinguish chamber is an integrated cylinder, the inner periphery of a shielding cylinder is provided with a convex ring of which the inner diameter is matched with the external diameter of the shielding cylinder, and the outer periphery of the shielding cylinder is connected with the inner periphery of the convex ring in a hermetic seal way; the radius of a wave trough of a corrugated tube is identical to that of a wave crest of the corrugated tube; the soft connector is formed by overlapping, tightly pressing and flattening a plurality of copper foil tapes with identical width and length; the insulating pull rod comprises a mandril of which the two ends are respectively provided with a blind hole, a connecting piece embedded in the blind holes of the mandril and an insulating sleeve sleeved outside the mandril in an attaching way, and the middle part of the outside surface of the insulating sleeve is provided with a plurality of layers of skirt rims at equal intervals; and a spring seat and a spring support seat of the brake separating spring are respectively and detachably installed on an armature and a substrate.

The present invention relates to a high-voltage vacuum circuit-breaker. It is composed of upper wiring flange, lower wiring flange, arc extinguishing unit, frame, supporting frame and control box. The frame is fixedly mounted on the supporting frame, the three-phase arc extinguishing unit is fixedly mounted on the frame, all the movable components of said arc extinguishing unit are mechanically connected on the spring mechanism in the control box, the arc extinguishing unit is characterized by that in its arc extinguishing chamber a vacuum tube is mounted, and its movable contact and static contact are mounted in the vacuum tube.

The invention provides an arc extinguishing chamber for an isolation breaker and the isolation breaker comprising the arc extinguishing chamber. The isolation breaker comprises the arc extinguishing chamber. A main static contact, a main moving contact, a static arc contact and a moving arc contact are correspondingly arranged in the arc extinguishing chamber in the up-down direction. When the isolation breaker is switched off, the main static contact and the static arc contact are located above the corresponding main moving contact and the corresponding moving arc contact, and the static arc contact and the moving arc contact are located on the inner side of the main static contact and the inner side of the main moving contact. A shielding case capable of shielding the static arc contact when the isolation breaker is switched off is arranged between the static arc contact and the main static contact. The shielding case is provided with a lower shielding end, and the lower shielding end is located below the static arc contact when the isolation breaker is switched off. Since the shielding case is arranged in the arc extinguishing chamber, the isolation breaker can be used as both a breaker and an isolation switch; the arc extinguishing chamber is simple in structure, convenient to use and capable of effectively lowering the design cost and the manufacturing cost of the isolation breaker, and has no additional requirements for the operation structure of an existing breaker.

The invention discloses an elastic pressure relief system for reducing breaker operation work. The elastic pressure relief system comprises a nozzle, a movable arc contact, a cylinder, a first flange, a second flange, a pull rod and a cylinder seat. The lower portion of the nozzle is fixed on the upper portion of the inner side of the cylinder, the upper portion of the nozzle extends out of the inner side of the cylinder, the upper end of the movable arc contact extends into the nozzle, an interval is reserved between the movable arc contact and the nozzle, and the lower end of the movable arc contact is connected with an inner side wall of the cylinder through the first flange. The lower portion of the cylinder is sleeved on the cylinder seat, an upper end cover of the cylinder seat is provided with the second flange, and the pull rod penetrates through the second flange to be fixedly connected with the first flange and drives the first flange to drive the cylinder to move. The first flange, the cylinder and the second flange are enclosed to form an air pressing chamber, and a pressure reducing valve and an air returning valve are arranged on the second flange. The pressure relief system is simple in structure, can effectively reduce the breaker operation work and does not influence arc quenching effect.

The invention relates to a self-energy dual-acting arc extinguishing chamber, and belongs to the technical field of a high-voltage switch. The automatic arc extinguishing chamber comprises a movable end part and a static end part, wherein the movable end part comprises a movable end pull rod, an air cylinder, an expansion chamber and an auxiliary nozzle, the static end part comprises a static arccontact, an arc extinguishing nozzle and a connection rod structure, the auxiliary nozzle is fixedly connected with the arc extinguishing nozzle, the static arc contact can be driven to achieve equal-speed deviation motion during the motion process of the movable end pull rod, the static arc contact is provided with a piston, an outer wall of the piston is matched with an inner wall profile of thearc extinguishing nozzle, a gap is formed between the outer wall of the piston and the inner wall profile, an air guide passage is formed in the static arc contact and communicates with a surface ofthe piston from an axis, high-voltage gas generated by an arc flows into an enclosed region formed between the piston and the arc extinguishing nozzle through the air guide passage, and the capacity of the expansion chamber is equivalently expanded. The self-energy dual-acting arc extinguishing chamber is provided with the air cylinder, the expansion chamber and an auxiliary piston, a three-air chamber structure is formed during the breaking process, the arc extinguishing speed is rapid, and an effect is good.

The invention discloses a rotary air-compressing load switch and a nozzle assembly thereof. The nozzle assembly comprises a rotary piston installed in a cylinder and a movable contact knife. The top of the rotary piston is inwardly recessed to form an air outlet corresponding to the cylinder. The air outlet is provided with a first lateral side and a second lateral side. The movable contact knife corresponds to the cylinder, is fixedly connected with the inner side of the rotary piston, and comprises a first blade and a second blade in parallel. Gaps are arranged between the first blade and the second blade, the first lateral side and the first blade and/or the second blade and the second lateral side such that a main nozzle, a first lateral nozzle and/or a second lateral nozzle are formed. Therefore, when the rotary piston rotationally compresses air in the cylinder, the air fast erupts from the air outlet via the nozzles. The nozzle assembly may control arc at a position which is the most beneficial to arc extinction and extinguishes the arc at the highest speed.

The invention relates to an electric spring operating mechanism belonging to the technical field of a high-voltage power switch. The electric spring operating mechanism comprises a base, a motor, a transmission shaft assembly, a lead screw assembly and a spring assembly, wherein the transmission shaft assembly is fixedly arranged on the base; one end of the spring assembly is connected with the base, and the other end of the spring assembly is connected with the transmission shaft assembly; both ends of the lead screw assembly are fixedly arranged on the base and are connected with the transmission shaft assembly; and the motor is connected with the lead screw assembly in a meshing mode. The invention satisfies the driving task of a fast grounding switch in a GIS (Gas Insulated Switchgear) so as to achieve the functions of fast switching-on and slow switching-off of the fast grounding switch. Besides, the electric spring operating mechanism has the advantages of simple structure, beautiful appearance, stable performance and high reliability.

The invention relates to an operating mechanism, and in particular designs a permanent magnet operating mechanism for a circuit breaker. The permanent magnet operating mechanism for a 50 kA vacuum circuit breaker comprises a main shaft, a transmission mechanism, a permanent magnet mechanism, a holding module and magnet steel which is matched with the holding module, wherein the holding module comprises a magnet steel shell. The permanent magnet operating mechanism is characterized in that the holding module adopts a multi-ring and multi-magnetic pole structure; and the multi-ring and multi-magnetic pole structure comprises a plurality of magnetic rings with different diameters, and the magnetic rings are arranged sequentially by taking a central shaft of the magnet steel shell as a center to form the multi-ring and multi-magnetic pole structure. The permanent magnet operating mechanism has the characteristics of big holding force at an on-position, little operation power of the permanent magnet operating mechanism, good compatibility, reliable performance and the like.

The invention relates to a transmission mechanism and a three-position switch using the same. The three-position switch comprises a transmission mechanism, an isolating moving contact and an isolating static contact. The transmission mechanism includes an isolating slide and a grounding slide of which the axial extension lines intersect with each other. A driving crank arm is hinged to the intersection. An isolating connector and a grounding connector are hinged to the driving crank arm. An isolating slider and a grounding slider are respectively assembled in the isolating slide and the grounding slide in a guide sliding manner. The isolating moving contact and a grounding moving contact are respectively mounted on the isolating slider and the grounding slider. The isolating connector is hinged to and fixedly connected with the isolating slider. The grounding connector is hinged to and fixedly connected with the grounding slider. Compared with the prior art, the moving distance of the grounding moving contact is smaller than that of the isolating moving contact when the isolating moving contact moves to the closing position, and the moving distance of the isolating moving contact is smaller than that of the grounding moving contact when the grounding moving contact moves to the closing position, both of which reduce the operation work needed by the transmission mechanism.

The invention discloses a grounding loop moving/static contact device for a load switch, belonging to the field of a high voltage switch gear. The invention provides a moving/static contact device which is characterized in that the capacity of arc resistance is strong, the electric field is uniform and two stations are designed in a direct-acting mode. The grounding loop moving/static contact device for a load switch comprises a static contact device, a conductive electrode, a moving contact device and a crank arm, wherein the moving contact device and the static contact device are arranged on the same axis; the moving contact device comprises an cylindrical intermediate electrode provided with contact blade slots at two ends, a sleeve and the conductive electrode, multiple contact blades are arranged in the contact blade slots, the conductive electrode is arranged in the cylinder of the intermediate electrode, the conductive electrode is communicated with the contact blade at the tail end of the intermediate electrode, the intermediate electrode is arranged in the sleeve, a guide slot is arranged on the outer surface of the sleeve, a boss is arranged at one end of the crank arm, the boss on the crack arm slides in the guide slot of the sleeve and drives the moving contact device to do a reciprocating motion along the axis.

The invention provides a three-position switch with switching on and self-locking functions. The switch comprises three fixed contacts (1, 2 and 5) and a movable contact (10). The movable contact (10) and the fixed contacts (1, 2 and 5) are always in good contact. Moreover, the movable contact (10) can rotate around a shaft (O2) between the fixed contact (1) and the fixed contact (2). The movable contact (10) is driven by a link mechanism (3, 4, 6, 7, 8, 9 and 11). A power shaft (O3) is arranged for providing driving force. The fixed contact (5) is connected with the fixed contact (1) and the fixed contact (2) through the movable contact (10). When the three-position switch is switched on, a crank arm of the link mechanism is located on the same straight line with connection plates (3 and 4) or connection plates (6 and 7), and the crank arm is in a dead point state; when the movable contact (10) is an active piece, the crank arm and the connection plates (3 and 4) or connection plates (6 and 7) can not move.

The invention discloses a circuit breaker phase-selection opening and closing device and a control method. The circuit breaker phase-selection opening and closing device comprises a circuit breaker and a circuit breaker opening and closing control system, and is characterized in that the circuit breaker comprises a first pole column, a second pole column and a third pole column, the first pole column, the second pole column and the third pole column are internally provided with a pressure sensor, the first pole column, the second pole column and the third pole column of the circuit breaker areprovided with a displacement sensor at the bottom, and the opening and closing control system comprises a main controller, a temperature sensor, a timer, a first driving circuit, a second driving circuit, a third driving circuit, a first motor, a second motor, a third motor, a wireless communication circuit, a first opening and closing operating mechanism, a second opening and closing operating mechanism and a third opening and closing operating mechanism. The circuit breaker phase-selection opening and closing device has a function of real-time compensation and a characteristic of stable opening and closing time.