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200results about How to "Increase breaking speed" patented technology
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Semi-controlled active injection current high voltage direct current breaker and realization method thereof
ActiveCN103337851AReduce on-state lossExtended service lifeDc network circuit arrangementsHigh-voltage direct currentEngineering
The invention relates to a breaker of a direct current system, in particular to a semi-controlled active injection current high voltage direct current breaker and a realization method thereof. The breaker comprises a high speed switch-thyristor module branch, as well as a lightning arrester branch and a bridge circuit which are connected in parallel with the branch, wherein a capacitor-reactor series branch and a resistor-thyristor series branch are connected in parallel and then connected with middle points of two bridge arms of the bridge circuit; and the two ends of a capacitor are connected in parallel with a charging loop. The breaker is based on a direct current breaking principle by the traditional active injection current manner; semi-controlled power electronic devices are added; a high speed mechanical switch is adopted; the advantage of low loss during normal breakover is kept; and bidirectional current can be broken quickly without an arc. The breaker is simple in circuit topological structure, simple and convenient to control, mature in technology, easy to realize, great in current breaking capability, high in withstand voltage level and strong in expansion capability, and the cost is lowered greatly since the number of the adopted power electronic devices is small.
Owner:STATE GRID CORP OF CHINA +1
High-voltage DC circuit breaker and realization method thereof
ActiveCN104767171AReduce on-state lossRealize no arc breakingEmergency protective arrangements for automatic disconnectionCapacitanceMain branch
The invention relates to a circuit breaker and a realization method thereof, and particularly relates to a high-voltage DC circuit breaker and a realization method thereof. The DC circuit breaker, based on a secondary current transferring principle, comprises a main branch, a current transferring branch and an energy absorption branch in parallel connection. The DC circuit breaker is serially connected in a DC system. The main branch comprises at least one high-speed mechanical switch K and at least one current transferring module comprising a fully-controlled device in serial connection. The current transferring branch is a bridge circuit formed by thyristor valves, inductors and capacitors. The energy absorption branch is formed by a non-linear resistor. The invention also provides a high-voltage DC circuit breaker realization method. The circuit breaker provided by the invention has a simple topological structure, the control is simple and convenient, used power electronic devices are mainly half-controlled thyristors, the technology is mature, realization is easy, the current breaking ability is large, a voltage-withstanding grade is high, the extension ability is strong, and the cost is greatly reduced.
Owner:STATE GRID CORP OF CHINA +1
Direct-current breaker and cutoff method thereof
ActiveCN103178486AAccelerateLess seriesArrangements responsive to excess currentEnergy absorptionSemiconductor
The invention discloses a direct-current breaker including a converter circuit, a cutoff circuit and an energy-absorption circuit which are connected in parallel. A breaker comprises a control circuit which is connected to the converter circuit, the cutoff circuit, the energy-absorption circuit and a main circuit respectively. The converter circuit comprises converter units connected in series and at least one mechanical switch. The cutoff circuit comprises N cutoff units connected in series. Arc-less breaking of current can be realized rapidly with the direct current breaker controlled; and number of switches of a power semiconductor is greatly decreased on the premise of realizing two-way cutoff capacity is realized, and cost is reduced.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
Two-way line current breaking device and control method thereof
ActiveCN103972855AReduce on-state lossReduce lossHigh-tension/heavy-dress switchesArrangements responsive to excess currentPower semiconductor deviceNonlinear resistor
An apparatus for breaking a line bidirectional current and a control method therefor. The apparatus comprises a breaking current branch circuit (9) and an on-state current branch circuit (30), wherein the breaking current branch circuit (9) comprises one nonlinear resistor (13) being connected in parallel to one first power semiconductor device (5), or one nonlinear resistor (13) being connected in parallel to at least two first power semiconductor devices (5) mutually connected in series; and the on-state current branch circuit (30) comprises at least one bidirectional power semiconductor switch (12) being connected in series to at least one high-speed isolation switch (11). The apparatus also comprises a bridge-type branch circuit, wherein the bridge-type branch circuit comprises two bridge arms constituted by four identical current commutation branch circuits. The apparatus can break a bidirectional current.
Owner:NR ELECTRIC CO LTD +1
High-voltage direct-current circuit breaker based on rapid repulsion force mechanism and insulating transformer
InactiveCN103928913AReduced insulation requirementsEasy to solveEmergency protective circuit arrangementsEnergy absorptionTransformer
The invention discloses a high-voltage direct-current circuit breaker based on a rapid repulsion force mechanism and an insulating transformer. The circuit breaker topologically comprises a current conversion branch circuit, a main circuit breaker branch circuit, a rapid switching energy supply unit, a main loop electric reactor unit and a main loop isolation switching unit. The current conversion branch circuit is an LC oscillation branch circuit. The main circuit breaker branch circuit is formed by connecting an adjustable electric reactor and a plurality of rapid switching energy absorption voltage-sharing modules in series. Each rapid switching energy absorption voltage-sharing module is formed by connecting a rapid switch, a lightning arrester and an RC voltage-sharing branch circuit in parallel. The rapid switching energy supply unit ensures rapidity and cooperativity of actions of the rapid switches. The main loop electric reactor unit is used for reducing a fault current ascending rate. The main loop isolation switching unit is used for protecting internal components after the circuit breaker conducts breaking successfully. According to the high-voltage direct-current circuit breaker, on the basis of the rapid repulsion force mechanism and the insulating transformer, the breaking speed is high, the fault current is prevented from ascending to the larger amplitude, the voltage level borne by the circuit breaker is high, breaking reliability is high, the structure is simple, and the manufacturing cost is low.
Owner:HUAZHONG UNIV OF SCI & TECH
Full-solidity direct-current breaker and control method thereof
InactiveCN103997322ANovel and concise topologyVersatileElectronic switchingDc circuit breakerElectric power
The invention provides a full-solidity direct-current breaker and a control method of the full-solidity direct-current breaker. A topological structure of the direct-current breaker comprises a current conversion branch circuit, a current breaking branch circuit, an energy absorbing branch circuit and a residual current isolating switch, wherein the current conversion branch circuit is composed of a voltage bearing switch and a current conversion switch connected with the voltage bearing switch in series, the current breaking branch circuit is connected with the current conversion branch circuit in parallel, the current conversion branch circuit is connected with the energy absorbing branch circuit in parallel, the residual current isolating switch, the current conversion branch circuit, the current breaking branch circuit and the energy absorbing branch circuit are connected in series in a main loop of an electric transmission line, and the current conversion branch circuit, the current breaking branch circuit and the energy absorbing branch circuit are connected in parallel. The topological structure of the direct-current breaker is novel and simple and achieves complete functions, the control method is simple, the function of short circuit current non-arc rapid disconnecting can be achieved, the voltage bearing switch, the current conversion switch and a current braking switch can be connected in series or in parallel through power electronic devices to achieve modularization, the requirement for consistency of the power electronic devices is lowered, and in-series use is achieved easily.
Owner:XI AN JIAOTONG UNIV
High voltage direct current circuit breaker topology circuit
ActiveCN104158171AReduce on-state lossImprove flow capacityDc network circuit arrangementsMain branchPower flow
The invention provides a high voltage direct current circuit breaker topology circuit which comprises a main branch, a current transfer branch and an energy absorption branch. The main branch, the current transfer branch and the energy absorption branch are connected in parallel. According to the high voltage direct current circuit breaker topology circuit provided by the invention, the structure of a circuit topology is simple; a stable current zero crossing point is in a breaking process; and the high voltage direct current circuit breaker topology circuit has the advantages of convenient control, flexible application, easy realization, high current breaking capacity, high withstand voltage level, high expansibility and low equipment cost.
Owner:STATE GRID CORP OF CHINA +2
Circuit-breaker automatic closing contact device with high breaking capacity
ActiveCN101958211AImprove breaking capacityNo loss of positive closure performanceProtective switch operating/release mechanismsCircuit-breaking switch contactsTorsion springBreaking capacity
The invention relates to a circuit-breaker automatic closing contact device with high breaking capacity, which comprises a contact support, a rotating shaft, a fixed contact, a rotary dual-breakpoint moving contact installed on the contact support and a contact spring. The fixed contact and the moving contact are symmetrically distributed in relative to the rotating shaft, and an operating mechanism and an electromagnetic mechanism respectively drive the contact support to rotate through a control part of the operating mechanism and a control part of the electromagnetic mechanism of the contact device. Spring fixing shafts are symmetrically arranged on a shell on both sides of the contact support, one end of the contact spring is abutted against the shell, the other end is butted upon a torsion spring contact wire of the contact support, and the contact spring applies a torsion spring force to the contact support in the contact closing direction through the torsion spring contact wire. The automatic closing contact device without exogenic action has high breaking capacity, minimizes the influence of the contact spring on the breaking resistance of the moving contact while not reducing the reliable closing property of the contact, increases the breaking speed and the reliability of the contact and reduces arcing risk.
Owner:SHANGHAI NOARK ELECTRIC
Very high breaker in use for GIS
InactiveCN1959892AReduce manufacturing costReduce manufacturing difficultyHigh-tension/heavy-dress switchesAir-break switchesMotion resistanceBreaking capacity
The invention relate to breaker, especially to super high-voltage circuit breaker in use for GIS. The disclosed breaker includes breaking contactor mechanism, and operating mechanism for switching on / off resistances, and controlling action of breaking contactor mechanism. Through pull rod and regulating lever, one set of operating mechanism can control two sets of breaking contactor mechanism since technique of adjusting compression spring for moving contactor is utilized. The invention possesses breaking function at double speed, reduces kinetic resistance of moving contactor, and quickens breaking speed. Stepped breaking technique adopted in the invention lowers over voltage of operation greatly, as well as increases rated capacity and breaking capacity greatly. The invention also reduces cost of equipment and difficulties for manufacturing the disclosed breaker.
Owner:王光顺
Direct Current Switch-Off Device And Control Method Thereof
ActiveUS20190020193A1Reduce equipment costsImprove scalabilityEmergency protective arrangements for automatic disconnectionHigh-tension/heavy-dress switchesNonlinear resistorElectrical resistance and conductance
A direct current switch-off device comprises an on-state current branch circuit and a current commutating and breaking unit which are connected in parallel. The on-state current branch circuit has a mechanical switch (S) and a current transfer module which are connected in series. The current commutating and breaking unit comprises a bridge-type branch circuit and a current-breaking branch circuit. The current-breaking branch circuit and two bridge arms of the bridge-type branch circuit are connected in parallel. The current-breaking branch circuit comprises a nonlinear resistor (RI) and a valve group consisting of fully-controlled devices connected in series. The nonlinear resistor (RI) and the valve group are connected in parallel. Two ends of each fully-controlled device in the valve group are connected in parallel with a buffering and reclosing circuit.
Owner:NR ELECTRIC CO LTD +1
Low pressure all-purpose air breaker mechanism and control method thereof
InactiveCN101140830ASuccessful operationIncrease breaking speedSwitch power arrangementsProtective switch operating/release mechanismsActuatorForward current
An mechanism and its controlling method for the omnipotence airbreak circuit breaker under voltage is provided, which comprises bi-stable magnetic actuator noumenon and subordinate link mechanism. The rods L3 and L4 are welded with the rotating shaft 3 to form a one-piece construction. After switch on of moving contact, the fifth rod and the sixth rod are in same straight line and the subordinate link mechanism converts the electromagnetic force curves of the bi-stable magnetic actuator which is favorable for overcoming returning positive moment of the super spring. When switching on, the on-and-off switch is energized, wherein the closing coil is switched to forward current while the breaking coil is switched to the backward current. When switching off, the on-and-off switch is also energized, wherein the breaking coil is switched to forward current while the closing coil is switched to the backward current. The reaction spring improves the switching-off speed. The invention realizes the high thrust generated by minute-extension bi-stable magnetic actuator by simultaneously energizing the improved bi-stable magnetic actuator, subordinate link mechanism and on-and-off switch, meeting the requirements of test on short-time withstand of power switch and fast switching on and off.
Owner:SOUTHEAST UNIV
Composite temporary plugging agent for fracturing and preparation method of composite temporary plugging agent for fracturing
PendingCN110305652AImprove the blocking effectReduce harmDrilling compositionFracturing fluidSolvent
The invention provides a composite temporary plugging agent for fracturing and a preparation method of the composite temporary plugging agent for fracturing. The composite temporary plugging agent isprepared from, on the basis of the total mass of the composite temporary plugging agent, 5-90% of polyglycolic acid, 0.1-3% of a non-crosslinking fracturing fluid thickening agent, 0.1-5% of an oxidant, 0.01-2% of an activating agent, 0.2-3% of inorganic base and the balance solvent. Polyglycolic acid has a great plugging performance and a complete and thorough degradation property and can be decomposed into carbon dioxide and water, and under the condition that a reservoir temperature is in a range of 30-240 DEG C, self-degradation of polyglycolic acid can be realized, and polyglycolic acid is also available for synergistic degradation with a gel breaker, so that artificially-controllable complete degradation can be realized, reservoir damages can be reduced, and reservoir production capacity is increased to the greatest extent.
Owner:SHANGHAI BRANCH CHINA OILFIELD SERVICES +1
Clean air foam cracking liquid
The invention provides a clean air foam cracking liquid. The clean air foam cracking liquid is prepared by mixing the following components in percentage by mass: 0.4% to 1.5% of zwitter-ion surfactant, 0.3% to 2.0% of composite cation ion surfactant, 0.0% to 0.5% of foam stabilizer, 0.5% to 3.0% of clay stabilizer, 0.6% to 2.05 of low-molecular alcohol, and the balance of water. The clean air foamcracking liquid has the advantages that the anion ion surfactant is not contained, so that the preparation is simple; after indoor evaluation, the foam quality can reach 55% to 80%, the foam qualityis high, the viscosity is high, and the sand carrying ability is excellent; by utilizing the surfactant beams to mutually wind and adhere, the crosslinking agent is not required, the adhesive breakingspeed is quick, and the permeability of the reservoir can be well protected because the anion ion surfactant is not contained after adhesive breaking and the adsorption with stratum dose not occur; under the condition of lower adding amount of surfactant, the better temperature-resistant property is obtained; the cost is low, and the preparation technology is simple.
Owner:河北中大永迪生物科技有限公司
Unblocking agent for polymer gel profile control agent
InactiveCN101928557AIncrease breaking speedStrong glue breaking abilityDrilling compositionSalt resistancePolymer science
The invention discloses an unblocking agent for a polymer gel profile control agent. The unblocking agent for the polymer gel profile control agent comprises hydrogen peroxide and industrial hydrochloric acid, has the advantages of temperature resistance, salt resistance, fast gel breaking and strong gel breaking capability and solves the problems of slow gel breaking and insufficient gel breaking of the traditional polymer unblocking agent. The gel breaking time of the unblocking agent for the polymer gel profile control agent is shorter than 2 hours, the tolerable temperature reaches 85 DEG C and the maximum mineralization degree (based on sodium chloride) is 40,000 mg / L (the solution is prepared based on sea water); and 15 weight percent of hydrogen peroxide and 15 weight percent of industrial hydrochloric acid or 7.5 weight percent of hydrogen peroxide and 22.5 weight percent of industrial hydrochloric acid are mixed respectively, and the blocking can be completely removed after 2 hours of experiment.
Owner:CHINA NAT OFFSHORE OIL CORP +1
Method for preparing hydrophobic white carbon black
ActiveCN103191588AImprove hydrophobicityImprove performanceFoam dispersion/preventionEmulsionSilicon
The invention discloses a method for preparing hydrophobic white carbon black. The method comprises the following steps: 1, preparing macromolecular modifier emulsion, namely adding an emulsifying agent, and dispersing a macromolecular modifier in deionized water so as to prepare the macromolecular modifier emulsion; and 2, preparing the hydrophobic white carbon black, namely adding white carbon black into deionized water so as to prepare a white carbon black suspension with the concentration of 5-45%, mixing the macromolecular modifier emulsion prepared in step 1 with the white carbon black suspension according to a ratio of (1:1)-(1:6), adding alkali to regulate the pH value to be 7-12, heating to be 30-90 DEG C, drying and grinding to prepare the hydrophobic white carbon black, wherein the reaction time is controlled between 1-5 hours. The prepared hydrophobic white carbon black has good hydrophobicity, the defoaming performance of a high-silicone emulsion defoaming agent which is subsequently produced can be effectively improved, and the time and the cost for producing the defoaming agent are greatly reduced.
Owner:陈卫 +1
Control and protection switch electric appliance
ActiveCN101459018BNo critical bounceExtend your lifeSwitch power arrangementsArrangements responsive to excess currentMagnetic tension forceAutomatic control
Owner:扬州新菱电器有限公司
Line current breaking device and control method thereof
ActiveCN103971965AIncrease breaking speedHigh speedElectric switchesArrangements responsive to excess currentPower semiconductor devicePower flow
An apparatus (20) for breaking a current of a circuit (44) and a control method thereof. The apparatus (20) for breaking a current of a circuit (44) comprises a unidirectional direct current breaker (10) and a bridge branch circuit. The bridge branch circuit comprises two bridge arms formed by four identical commutating branch circuits (A, B, C, D), two groups comprising two commutating branch circuits each in the four commutating branch circuits are connected in series in the same direction, two formed bridge arms are connected in parallel, and each commutating branch circuit comprises a same-direction serial connection of at least one first power semiconductor device (7). Two bridge arms of the bridge branch circuit are both connected in parallel to the unidirectional direct current breaker (10), and two ends of the circuit (44) are separately connected to bridge arm middle points (3,4) of the two bridge arms. On the premise of enough high breaking speed and low loss, the apparatus (20) for breaking a current of a circuit (44) can greatly reduce the cost of the apparatus, and reduce the layout, mounting and wiring difficult of the apparatus and the device.
Owner:NR ELECTRIC CO LTD +1
Ballastless track base plate post-cast strip breaking device, system and method
PendingCN110359329AWill be damagedDoes not cause crack growthTrack maintainenceLocking mechanismEngineering
The invention discloses a ballastless track base plate post-cast strip breaking device, system and method, and relates to the technical field of concrete breaking equipment. The device comprises a lateral locking mechanism which is fixed on a rack. The rack is also fixedly provided with a guide shaft, and the rack is further provided with a driving mechanism which slides along the guide shaft anda lifting mechanism which enables the driving mechanism to move up and down. The output end of the driving mechanism is provided with a hollow shaft, and the input end of the hollow shaft is is connected with a rotary joint; and the output end of the hollow shaft is further fixedly provided with a high-pressure spray head, wherein the high-pressure spray head communicates with the interior of thehollow shaft. According to the ballastless track base plate post-cast strip breaking device, system and method, a post-cast strip can be broken without using an oppositely-cover plate, and during theconstruction, a reinforcement cage structure can be maximally retained, so that a concrete structure is removed without damaging reinforcing steel bar, and accordingly the breaking speed of the post-cast strip is improved by 20 times-50 times.
Owner:成都交大铁发轨道交通材料有限公司 +1
Method for preparing defoamer for cement mortar containing rubber emulsion
The invention relates to an organic silicon defoamer. The organic silicon defoamer comprises the following main materials in part by weight: 10 parts of dimethicone, 2 parts of hydroxyl silicone oil, 3 parts of polyether silicone oil and 1 to 5 parts of precipitated silicon dioxide. The method comprises the following steps of: preparing three kinds of silicone oil and the precipitated silicon dioxide by a three-roller grinding machine at the temperature of between 140 and 200 DEG C to obtain silicon paste; and adding the silicon paste and an emulsifier (1 to 3 parts of Tween 80, 1 to 3 parts of spunray and 1 part of spandex (OP)) into a stirring kettle, adding 30 to 50 parts of water while stirring, and stirring uniformly for half an hour to prepare uniform emulsion serving as the organicsilicon defoamer. The invention has the advantages that the organic silicon defoamer can be used for the preparation and using process of the cement mortar which is used for construction and containsthe rubber emulsion, has high defoaming and foam breaking capacity, can improve the breaking speed of air bubbles and reduce the generation quantity of the air bubbles, and has high compatibility andstability.
Owner:DALIAN RES & DESIGN INST OF CHEM IND
Electric lever type leakage preventing socket
ActiveCN101499591AIncrease breaking speedProtection securitySwitch operated by current/voltage unbalanceCoupling device detailsAc circuitTransformer
The invention provides a leakage protection socket, which comprises a transformer component, a trip coil component and a control circuit. The transformer component is used for detecting the current leakage in the alternating current circuit; the trip coil component comprises two fixed permanent magnets and an electromagnet which performs the reciprocating motion between the two permanent magnets; the electromagnet is provided with a lever component which can connect or disconnect the alternating current power supply along with the reciprocating motion of the electromagnet; when the socket is powered on, the control circuit controls the electromagnet of the trip coil component to be attached to one of two permanent magnets, so as to drive the lever component to connect the alternating current power supply; and when the transformer component detects that current leakage occurs in the alternating current circuit, the electromagnet is controlled to be attached to the other permanent magnet, so as to drive the lever component to disconnect the alternating current power supply. The invention has the advantages of small leakage action current, high-speed disconnection, and high reliability and sensitivity, thereby more effectively protecting the security of the personal and the electrical equipment.
Owner:ZHEJIANG CHINT BUILDING ELECTRICS
A high-voltage protective circuit breaker
InactiveCN108987205AImprove protectionAchieve protectionProtective switch operating/release mechanismsComputer moduleHigh pressure
The invention belongs to the technical field of circuit breakers, in particular to a high-voltage protection circuit breaker, comprising a housing, an input terminal, an output terminal, a circuit breaker module, an air cylinder, an output wire, an input wire, a fixing plate and a metal ball; An input terminal is arranged on the outer wall of the bottom of the housing; An output terminal is arranged on the left outer wall of the housing; Circuit break module is positioned inside that house, and the circuit breaker module is positioned on the right side of the housing; On the left inner wall ofthe cylinder mounting housing, the cylinder piston rod is connected with the circuit breaker module; The left end of the output line is connected with the output terminal, and the right end of the output line is located in the housing; One end of the input line is connected with the input terminal, and the other end of the input line is located in the housing; The fixing plate is arranged in theshell, and the fixing plate is installed through the front and rear walls of the shell. The number of metal balls is two, the metal balls are arranged up and down, and the metal balls are in contact with each other.
Owner:李涵
Reclaimed superglue and production method thereof
InactiveCN103012894AAccelerated swellingIncrease breaking speedPlastic recyclingBuilding insulationsTarWaste rubber
The invention discloses reclaimed superglue and a production method thereof. The reclaimed superglue comprises the following components: 78.5-89.6 percent of waste rubber powder, 10-20 percent of pine tar, 0.2-0.5 percent of activating agent B-480 and 0.2-1.0 percent of rosin. The production method comprises the following steps of: carrying out disassembly, coarse crushing, magnetic separation, fine crushing, magnetic separation, screening and magnetic separation on waste tyres in sequence to obtain 10-30 meshes waste rubber powder; feeding the 10-30 meshes waste powder rubber into a desulfurization machine by using a feeder, spraying the pine tar, the activating agent B-480 and the rosin into the desulfurization machine by a dosing machine, stirring and mixing, and desulfurizing for 40-80min at 290-310 DEG C to obtain plastic glue; processing the plastic glue by using three open mills and a refining mill in sequence to obtain the reclaimed superglue, wherein the roller distance of each open mill is set to be 1mm, the roller temperature of each open mill is controlled to be below 70 DEG C, the roller distance of the refining mill is controlled to be 0.2mm-0.4mm, the roller temperature of the refining mill is controlled to be below 90 DEG C; and then shearing the reclaimed superglue into glue blocks each of which is 20KG in weight, metering and packaging the glue blocks and warehousing the packaged glue blocks. The production method disclosed by the invention is continuous and automatic, low in energy consumption, free of water pollution and excellent in performance.
Owner:JINHU JINXIANG RUBBER TECH CO LTD
Control and protection switch electric appliance
ActiveCN101459018ANo critical bounceExtend your lifeSwitch power arrangementsArrangements responsive to excess currentMagnetic tension forceAutomatic control
The invention relates to a control and protecting switch apparatus, which belongs to the technical field of automatic control of electric motors. The control and protecting switch apparatus is mainly characterized in that a permanent magnet driving mechanism and a control circuit adapted to the permanent magnet driving mechanism are arranged on a base, when switching-off in work, magnetic force generated by pulse and electrodynamic force generated on a moving iron core enable the moving iron core to move to pull in a fixing iron core to form a closed magnetic circuit, and simultaneously a main contactor is enabled to be switch-on, the pull-in of the switch is kept by the magnetic force of a permanent magnet, when switching off, reverse magnetic force and reverse electrodynamic force generated on the moving iron core counteract the pull-in force of the permanent magnet, and the main contactor is fast switched-off under the action of a switch off tensional spring. For coils don't need to be electrified to work for a long time, the invention is high-efficient and energy-saving, has unheated coils, is fast in switching-off speed and not connected in contacts without critical bounce, and can efficiently prolong the service life of the contacts. The invention has extremely strong practicability, is an updated product of the existing control and protecting switch apparatus which utilizes an electromagnetic driving mechanism, and can be widely applied to power supplying circuits of electric motors.
Owner:扬州新菱电器有限公司
Operating mechanism for molded case circuit breaker
ActiveCN102034652AIncrease breaking speedIncreased accelerated breaking speedProtective switch operating/release mechanismsContact systemEnergy storage
The invention discloses an operating mechanism for a molded case circuit breaker, which comprises a handle, main tension springs, a bracket, a latch, a secondary buckle, an upper connecting rod, a lower connecting rod, a moving contact system and an accelerating breaking device. The accelerating breaking device comprises a tripper, a tripper rotating shaft and an energy storage spring, wherein the tripper is arranged on the tripper rotating shaft in a rotating way; the two ends of the tripper rotating shaft are fixed on the bracket; and one end of the energy storage spring is fixed, and the other end of the energy storage spring is connected to the tripper. When the circuit breaker is freely tripped, the energy storage spring can increase the rotating speed of the tripper to further increase the breaking speed of the whole mechanism. In switching-in and switching-off processes, as the tripper is buckled by the latch, the acting force of the energy storage spring may not increase the operating force of the handle in the switching-in and switching-off of the circuit breaker. In the operating mechanism, the breaking speed can be increased under the condition of not increasing the rigidity of the main tension springs, so the manufacturing cost of the operating mechanism is reduced and the service life of the operating mechanism is prolonged.
Owner:SHANGHAI LIANGXIN ELECTRICAL
Oscillation transfer and solid-state switch combined direct-current circuit breaker
ActiveCN112510647ASimple structureReduce on-state lossEmergency protective arrangements for automatic disconnectionEmergency protective arrangements for limiting excess voltage/currentCapacitor voltageTerminal voltage
The invention provides an oscillation transfer and solid-state switch combined direct-current circuit breaker, which is composed of a main current loop, a current transfer branch, an energy absorptionbranch and a control system. According to the invention, under the condition of small current on-off, a high-speed mechanical switch is controlled to be switched off to be connected with a corresponding power electronic device, current is transferred to a current transfer branch under the action of arc voltage, and then the power electronic device is controlled to be switched off, voltage at thetwo ends of a power electronic assembly rises and a lightning arrester is controlled to be connected; when a large-current short-circuit fault occurs, the high-speed mechanical switch is controlled tobe switched off to be conducted with the power electronic device; and a pre-charging capacitor injects reverse current into the fracture, the fracture current is subjected to zero-crossing arc extinguishing, short-circuit current is transferred to the current transfer branch and charges the capacitor, and when the capacitor voltage is greater than the lightning arrester conduction voltage, the lightning arrester is conducted. The novel direct-current circuit breaker has the characteristics of simple structure, low on-state loss, high full-current breaking speed and the like.
Owner:XI AN JIAOTONG UNIV +2
Energy routing system based on LCC-MMC, and direct current fault protection method
PendingCN113991662AIncrease breaking speedHigh breaking voltage levelFlexible AC transmissionElectric power transfer ac networkEnergy regulationVoltage control
The invention discloses an energy routing system based on LCC-MMC, and a direct current fault protection method, and belongs to the technical field of hybrid high-voltage direct current transmission. The topology of the system comprises a power grid phase control converter LCC, a modular multilevel converter MMC, an energy storage device BESS, an improved hybrid DC circuit breaker DCCB and a direct current bus. The energy regulation and control mode of the system comprises LCC side constant direct current voltage control, MMC alternating current side power decoupling control and energy storage interface Buck / Boost control. According to the direct current fault protection method of the system, energy storage unit power switching control and an improved hybrid direct current circuit breaker DCCB are combined to form a set of complete combined fault protection scheme. While the fault current is quickly isolated, the MMC side alternating current can be prevented from being distorted, the power supply quality of the system is greatly improved, reliable and stable operation of the alternating current power grid is ensured, and quick recovery of the system after the fault is facilitated.
Owner:YANSHAN UNIV
Electromagnetic-repulsion-driven high-speed piston type interrupter
ActiveCN103151189AMeet temperature rise requirementsSave energySwitch power arrangementsPistonCurrent limiting
The invention relates to an interrupter for quick current-limiting interruption during a short trouble of a power grid, in particular to an electromagnetic-repulsion-driven high-speed piston type interrupter. The electromagnetic-repulsion-driven high-speed piston type interrupter comprises a repulsion driving circuit, a repulsion coil, an input connecting terminal and an output connecting terminal, wherein the repulsion coil is connected in the repulsion driving circuit, a bridge body is connected between the input connecting terminal and the output connecting terminal in a bridging mode, an insulating sleeve is sleeved outside the bridge body, a repulsion plate is arranged below the bridge body and located above the repulsion coil, and an insulting block capable of breaking the bridge body off is fixed on the repulsion plate. An electromagnetic repulsion driving technology replaces an explosive driving technology, and thus defects of the explosive driving technology are overcome. The structure that the bridge body is connected between the two connecting terminals serves as a through-current circuit, so not only are the temperature-rising requirements of circulation of a large current met, but also energy required by interruption of the interrupter is reduced. The cost is greatly reduced, the interrupting speed and the interrupting reliability are greatly promoted, and the electromagnetic-repulsion-driven high-speed piston type interrupter has wide prospects for engineering application and good economic benefits.
Owner:NAVAL UNIV OF ENG PLA
Gas turbine guide flow disk
ActiveCN104895622ASimple structureRealize the technical effect of automatic stickingStatorsMachines/enginesStress levelGas turbines
The invention provides a gas turbine guide flow disk. Through arranging a flexible thin plate and adjusting a sealing structure, the pressing force of a sealing structure to a turbine disk is realized, so that the sealing structure can automatically bond to the turbine disk under the function of centrifugal force, so as to further guarantee the sealing reliability; the guide flow disk is positioned without the use of a 'snap ring'; besides, the gas turbine guide flow disk can eliminate the technical shortcomings of increased burden of turbine disk, raised stress level, and reduced rotate speed brought by the 'snap ring' in the prior art. The guide flow disk has good axial symmetry, good technique, and high reliability; for the thickness of a part having big radius of the guide flow disk and consisting of a fork, a middle section and a middle wheel plate is relatively thin, the centrifugal load is reduced; therefore, the stress level is decreased, the rupture rotate speed is improved, the fatigue service life is prolonged, weight is lightened, and the burden of the turbine disk is reduced, and demand of a high-performance aero-engine can be satisfied.
Owner:CHINA AVIATION POWER MACHINE INST
Honey decrystallization method and device
ActiveCN105495071AImprove heat transfer efficiencyIncrease the breaking speedFood preparationBee productsWater baths
The present invention discloses a honey decrystallization method and device and belongs to the technical field of bee product processing. The method includes the following steps: honey package barrel is washed clean and barrel lid is opened, the barrel is placed upside down in a crystal breaking chamber, and the air jet flow temperature is adjusted to 50-70 DEG C and the air flow speed is at 5-20 m / s to conduct air jet flow impact to break the crystal for 0.5-1.5 hours. After breaking the crystals, the honey flows into a honey melting chamber and the honey temperature is adjusted to a temperature of 40-60 DEG C to conduct crystal melting for 1-2 hours. The device includes: an air circulation channel (3), a heater (4), a fan (5), an air distribution pipe (6), a trailer (9), two sliding rails (10), two nozzles (11), a water bath heater (12), a steam heat exchanger (13), a stirring device (15), a heat exchange coil (16), a temperature sensor (17), and a temperature and air velocity sensor (19). The device is used to process the honey, which can effectively protect the biological activity of the honey, and the the device can save water and energy, is environmentally protective, and can achieve automatic control.
Owner:BEE RES INST CHINESE ACAD OF AGRI SCI +1
Long-break-distance contact structure capable of breaking rapidly
ActiveCN103617927AIncrease the maximum contact distanceIncrease breaking speedProtective switch operating/release mechanismsCircuit-breaking switch contactsMechanical engineeringBreaking capacity
Owner:浙江天正智能电器有限公司
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