200results about How to "Increase breaking speed" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.