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56results about How to "Short breaking time" patented technology

High voltage direct current breaker with multiple fractures and tandem type

The invention relates to a high voltage direct current breaker with multiple fractures and a tandem type. The breaker comprises a multi-fracture breaker, an oscillation loop and a dissipative element. The multi-fracture breaker includes a plurality of single-phase breakers and fractures of all the single-phase breaker are in series connection through connection buses; the multi-fracture breaker is respectively in parallel connection with the oscillation loop and the dissipative element through the connection buses; and a fracture of each the single-phase breaker is respectively in parallel connection with an RC equalizer circuit. According to the invention, fractures of a plurality of single-phase breakers are in series connection so as to form a multi-fracture tandem structure; effects of high drop-out voltage, heavy drop-put current and short drop-out time and the like are realized; and demands of ultra-high voltage and extra-high voltage direct current power transmission projects can be completely met. In addition, the oscillation loop in the invention is used for generating oscillation currents; the dissipative element is used for absorbing line energy and restricting overvoltages after currents are switched off; and the RC damping circuit is used for improving equalizing voltages between fractures of all the single-phase breakers.
Owner:CHINA ELECTRIC POWER RES INST +1

Gas-steam combined cycle distributed energy three-power quick-cutting system and method

The invention discloses a gas-steam combined cycle distributed energy three-power quick-cutting system and method. The system comprises three units, each unit is provided with a high-voltage factory busbar and a working power supply incoming line for providing a working incoming line power source, the working power supply incoming line is connected with the low voltage side of the main transformerthrough a current limiting reactor, and the two ends of the current limiting reactor are connected with a high speed current limiting protection switch in parallel; different emergency power supply incoming line switches are connected between the buses for high-voltage plants of any two units, the connection condition between the buses for the high-voltage plants between the units is controlled through the on-off of the emergency power supply incoming line switches; the features of the stage distribution of the power utilization loads, many units and the small capacity of the gas-steam combined cycle distributed energy plant are fully utilized, the working power source is got from the independent low-voltage side, the dual emergency power supplies are taken from the buses of the high-voltage plants of the adjacent units to solve the problems of the large investment, the wide area and the large power angle in the existing plant power quick-cutting configuration scheme.
Owner:XIAN THERMAL POWER RES INST CO LTD

Rapid transfer switch device and system and application

The invention discloses a rapid transfer switch device and system and an application. The rapid transfer switch device comprises a working power supply vacuum circuit breaker, a standby power supply vacuum circuit breaker, a switching power supply, a frame base, a control module, a zero-crossing module and an output current measuring module; the working power supply vacuum circuit breaker, the standby power supply vacuum circuit breaker, the switching power supply, the control module and the zero-crossing module are fixed on the frame base; the control module is connected with the switching power supply, the zero-crossing module and the output current measuring module; the positive output end and the negative output end of the zero-crossing module are connected to moving contacts and static contacts of the working power supply vacuum circuit breaker and the standby power supply vacuum circuit breaker respectively; the output current measuring module is installed on the output bus of the working power supply vacuum circuit breaker and the output bus of the standby power supply vacuum circuit breaker; and the control module is used for sending a switching signal to the switching power supply and the zero-crossing module so as to achieve the two-way switching from the working power supply to the standby power supply, or from the standby power supply to the working power supply. The device disclosed by the invention is high in switching speed and high in reliability.
Owner:ANHUI HEKAI ELECTRICAL TECH CO LTD

Processing device of shielding layer at end part of shielding cable

A processing device of a shielding layer at an end part of a shielding cable comprises a carding needle punching assembly and a pulling and stripping movement mechanism, wherein the carding needle punching assembly comprises a fixed seat, a plurality of carding needles, a rotary disc and a punching driving element, the pulling and stripping movement mechanism comprises a pulling and stripping sliding block, a pulling and stripping sliding rail and a pulling and stripping driving element, the pulling and stripping sliding block is fixedly connected with the carding needle punching assembly, the pulling and stripping sliding rail is connected with the pulling and stripping sliding block in a sliding way, the pulling and stripping driving element can drive the pulling and stripping sliding block to slide on the pulling and stripping sliding rail, the pulling and stripping sliding rail is arranged along the axial direction of the shielding cable, and the pulling and stripping driving element can drive the carding needle punching assembly to axially move along the shielding cable by the pulling and stripping sliding block. In the processing device, the needle tip parts of the carding needles are punched into the shielding layer woven by metal wires in the whole circumferential direction and then axially move along the shielding cable, so that the metal wires woven together can be easily scattered; and compared with an existing wheel brushing mode, the processing device has the characteristics of short dispersing time and high efficiency.
Owner:东莞市诠智自动化设备科技有限公司

Split self-propelled construction method adopted in large-span subway tunnel second-liner arch apex

The invention discloses a self-propelled model board trolley construction method adopted in a large-span subway tunnel second-liner arch apex. Before double-side-wall pioneer drift method secondary lining construction, concrete at the joint of a temporary support and a primary-support structure is removed at first, and the three-step approach of inverted arch heading, side wall following and archapex closing is adopted in secondary lining construction. According to inverted arch heading, median septum H-steel at the bottom of the inside of an inverted arch construction section is locally dismantled during inverted arch construction, and then the inverted arch construction is conducted. According to side wall following, a horizontal part medium partition plate inside a side wall construction section is locally dismantled when a side wall within the inverted arch range is constructed. According to arch apex closing, an arch apex within the side wall range is constructed. By adoption ofthe self-propelled model board trolley construction method adopted in the large-span subway tunnel second-liner arch apex, the risks like structural distortion, ground surface settlement and tunnel unstability caused by high-risk large-span subsurface tunnel secondary lining construction under complicated geological conditions are eliminated.
Owner:CCCC SECOND HARBOR ENG

Direct-current circuit breaker and application method thereof

The invention discloses a direct-current circuit breaker and an application method thereof. The direct-current circuit breaker is characterized in that a through-current branch circuit is connected in series into a power line; a controlled power supply unit is connected with the through-current branch circuit, an oscillation branch circuit and a grounding unit; and an energy consumption branch circuit can be connected with the main through-flow branch circuit in parallel and can also be connected with the oscillation branch circuit. When the power line does not have a fault, the through-flow branch circuit conducts a direct-current load current, a direct-current system pre-charges the oscillation branch circuit and the controlled power supply unit, and the oscillation branch circuit realizes self-energy taking; and when a short-circuit fault occurs in the power line, the oscillation branch circuit generates an oscillation current which is equal to a fault current in amplitude and opposite to the fault current in direction by controlling the operation states of the controlled power supply unit and the through-flow branch circuit, so that the through-flow branch circuit is reliably turned off, the amplitude of an injection current is improved by adopting a controlled active oscillation boosting principle, and arc extinguishing on-off of the through-current branch circuit is realized.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1

Cell wall breaking method of tagetes fresh flower

The invention relates to a cell wall breaking method of tagetes fresh flower. The cell wall breaking method comprises the following steps of preparing a compound enzyme preparation, and breaking the cell wall of the fresh flower. The cell wall breaking method is characterized in that 1 to 3 parts of fungal xylanase and 5 to 2 parts of endoglucanase by weight are mixed to form the compound enzyme preparation; the compound enzyme preparation is applied to break the cell wall of the tagetes fresh flower; the usage amount of the compound enzyme preparation is equal to 0.005 to 0.03% of the usage amount of the fresh flower; the fresh flower is composted and fermented for 3 to 5 days at the environment temperature of 10 to 40 DEG C, so as to reach the cell wall breaking effect of the fresh flower. The cell wall breaking method has the advantages that the cell wall of the fresh flower can be quickly broken by the added enzyme preparation, and can be completely broken in 3 to 5 days, so that the cell wall breaking time is equal to 1/6 to 1/4 of original cell wall breaking time in the prior art; the extracting rate of lutein reaches 97.2%, and is at least increased by 7%; the cell wall breaking time is shortened, the production amount of wastewater is reduced, the production cycle of the product is shortened, and the cost is reduced.
Owner:QUJING BOHAO BIOTECH

Permanent magnet vacuum circuit breaker and air inflation cabinet

The invention provides a permanent magnet vacuum circuit breaker and an air inflation cabinet. The permanent magnet vacuum circuit breaker comprises a drive rod, an insulating pull rod, a connecting rod assembly, a flexible connecting piece, a vacuum arc-extinguishing chamber and a wire incoming terminal which are arranged in sequence along the straight line, wherein the insulating pull rod is connected with the drive rod; the connecting rod assembly is connected with the insulating pull rod; a contact spring is arranged on the connecting rod assembly in a sleeving mode; a positioning hole isformed in the flexible connecting piece in a penetrating mode; the connecting rod assembly passes through the positioning hole; the contact spring abuts between the flexible connecting piece and the connecting rod assembly; the vacuum arc-extinguishing chamber is internally provided with a movable contact and a static contact; the movable contact is connected with the connecting rod assembly; themovable contact can move relative to the static contact; the movable contact and the static contact can be connected separately; and the wire outgoing terminal is electrically connected with the static contact. Through the devices arranged in sequence along the straight line, the realized miniaturized permanent magnet circuit breaker can provide quicker break time and breaking capacity for the airinflation cabinet.
Owner:瑞熙恩电气(珠海)有限公司

Non-polarized low-voltage circuit breaker

Disclosed is a non-polarized low-voltage circuit breaker, relating to the technical field of electrical switches. The non-polarized low-voltage circuit breaker includes an operating mechanism, two static contact assemblies, a bridge type moving contact assembly and two arc extinguishing chambers. The bridge type moving contact assembly is arranged opposite to the static contact assemblies. The twostatic contact assemblies are input and output static contact assemblies. The bridge type moving contact assembly and the two static contact assemblies are cooperated to form a left moving and staticcontact fracture and a right moving and static contact fracture. The left and right moving and static contact fractures are closely adjacent to the matched arc extinguishing chambers. When a circuitis switched on and off, arc is formed between the left and right moving and static contact fractures and generated self-excited magnetic fields repel each other since the current directions of the arcare opposite to drive the arc at the left and right fractures to automatically enter the two arc extinguishing chambers to realize arc extinguishing. The circuit breaker has two switch fractures andtwo arc extinguishing chambers, the two switch fractures are connected in series, arc energy produced when the circuit is opened is born by the two fractures, and arc extinguishing is born by the twoarc extinguishing chambers, so that the circuit breaker is favorable for rapid arc extinguishing.
Owner:XIAMEN ANDAXING ELECTRIC GRP CO LTD

FPGA loading method based on ZYNQ chip

The invention discloses an FPGA loading method based on a ZYNQ chip. The FPGA loading method comprises the steps of power-on automatic loading during power-on starting and upper computer control loading after a ZYNQ system is started; the power-on automatic loading process is as follows: when the equipment is powered on and started, the loading mode of the FPGA is defaulted to be active loading, and at the moment, the FPGA actively reads a file from Flash2 and rapidly loads the file; the upper computer control loading process comprises the steps that after the ZYNQ system runs, a control daemon process automatically runs, a network port is monitored, and an upper computer command is responded; the upper computer establishes communication with the ZYNQ system by using a network port, a serial port and the like, and issues an FPGA code to be updated; the ZYNQ system receives the data, stores the data in a DDR3 memory, verifies the data and feeds back a verification result to the upper computer; and the ZYNQ system determines an equipment updating mode according to an instruction of the upper computer. The FPGA loading method based on the ZYNQ chip, provided by the invention, has the characteristics that the FPGA is quickly and conveniently updated, and the interruption working time of equipment is short.
Owner:成都亿凌特科技有限公司

Active oscillation type direct-current circuit breaker and application method thereof

The invention discloses an active oscillation type direct-current circuit breaker and an application method thereof. The direct-current circuit breaker comprises a through-flow branch circuit, an oscillation branch circuit and an energy consumption branch circuit, wherein the through-flow branch circuit is connected with the oscillation branch circuit in parallel, the energy consumption branch circuit is connected with the through-flow branch circuit in parallel, or the energy consumption branch circuit is connected with internal elements of the oscillation branch circuit, and when a direct-current system does not fail, the oscillation branch circuit is locked, and the through-flow branch circuit conducts a direct-current load current. When a breaking command is received, the operation states of internal elements of the oscillation branch circuit and the through-flow branch circuit are controlled, so that the oscillation branch circuit generates oscillation current of which the amplitude is rapidly increased until the oscillation current and the short-circuit current are equal in amplitude and opposite in direction, and the through-flow branch circuit is reliably switched off; therefore, the problems of large reignition risk, obvious system oscillation, relatively high equipment cost and the like during small-current switching-off are solved, and large-scale popularization and application of the direct-current circuit breaker in a direct-current power transmission and distribution system can be realized.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1

Permanent magnet vacuum circuit breaker

The invention discloses a permanent magnet vacuum circuit breaker which comprises a circuit breaking unit and a bearing device used for installing the circuit breaking unit, the circuit breaking unit comprises a permanent magnet mechanism, an insulating part, a connecting assembly, a contact pressure spring, a conducting strip, a vacuum arc-extinguishing chamber, a switch static contact and a synchronizing assembly, and the permanent magnet mechanism comprises a movable core iron pull rod and a dustproof cover used for protecting the movable core iron pull rod. The connecting assembly comprises a first connecting rod, the movable core iron pull rod and the first connecting rod are each provided with a milled flat structure, the synchronizing assembly comprises a synchronizing shaft, a transmission pin, a synchronizing base and a synchronizing contact arm, and the synchronizing base guides the synchronizing shaft and the transmission pin. According to the permanent magnet vacuum circuit breaker, a direct driving design is adopted, many transmission links are reduced, the energy consumption is reduced, and the transmission efficiency is ensured to the maximum extent. The permanent magnet vacuum circuit breaker disclosed by the invention is designed to be integrally miniaturized, so that the reliability of an on-off circuit of a gas insulated switchgear can be improved, and shorter on-off time can be obtained.
Owner:MURGE ELECTRIC CO LTD

Arc extinguish chamber and tank-type circuit breaker

The invention relates to an arc extinguish chamber and a tank-type circuit breaker. The arc extinguish chamber comprises: a moving contact assembly, which comprises a moving contact base and a nozzle, wherein the nozzle can reciprocate in the moving contact base; a static contact assembly which comprises a static contact base, a static support and a static arc contact, wherein the static arc contact is assembled in the static contact base in a guiding and sliding manner, and a rotating shaft is arranged on the inner side wall of the static support; a connecting rod mechanism which comprises a movable end connecting rod, a static end connecting rod and a rotating arm, wherein the rotating arm is rotationally assembled on the rotating shaft, the rotating arm is provided with a long section and a short section, one end of the movable end connecting rod is hinged to the nozzle, the other end of the movable end connecting rod is hinged to the long section, one end of the static end connecting rod is hinged to the static arc contact, and the other end of the static end connecting rod is hinged to the short section; and a plane which passes through the center line of the static contact base and is parallel to the hinge axis of the movable end connecting rod and the long section is defined as a reference plane, and the rotating axis of the rotating arm and the hinge axis of the static end connecting rod and the short section are located on the same side of the reference plane.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER +1

Dialkyl urea type supramolecular thickening agent and preparation method and application thereof

The invention relates to a dialkyl urea type supramolecular thickening agent and a preparation method and application thereof. The preparation method comprises the following steps of: taking diisocyanate and alkylamine as reaction materials, carrying out an addition reaction to obtain a dialkyl urea thickening agent, wherein the alkylamine is 2-ethylhexylamine; and diisocyanate is 2, 4-toluene diisocynate or 2, 4 / 2, 6-toluene diisocynate. The thickening agent has good thickening performance on various alkanes, supramolecular aggregates can be formed in a non-polar solvent through intermolecular hydrogen bonds, and the supramolecular aggregates are further entangled to form a spatial network structure. Compared with the traditional cross-linking type fracturing fluid, the supramolecular hydrocarbon fracturing fluid prepared from the thickening agent does not need crosslinking, has excellent shear restorability and good sand carrying performance, can quickly break gel when mixed with stratum crude oil without adding a gel breaker, has the characteristics of short gel breaking time and no residue, and is particularly suitable for fracturing construction of low-permeability compact unconventional oil and gas reservoirs with serious water sensitivity.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Low-loss arc-free composite multifunctional DC contactor

InactiveCN105938780AShort breaking timeStrong resistance to impact currentRelaysCapacitancePower circuits
The invention relates to a low-loss arc-free composite multifunctional DC contactor. The structure is as follows: an input anode bus in an external power circuit is simultaneously connected with one end of a protective capacitor C of an IGBT tube, a collector C of the IGBT tube and an input end of a contactor K; an output anode bus in the external power circuit is simultaneously connected with the other end of the protective capacitor C of the IGBT tube, a drain E of the IGBT tube and an output end of the contactor K; one end of a current and voltage transmitting circuit is connected with the input anode bus and the output anode bus in the external power circuit and the other end is connected with an AD sampling port of a microprocessor circuit; one end of a contactor drive circuit is connected with a contactor solenoid and the other end is connected with an end S1 of the microprocessor circuit; and two ports of one end of an IGBT tube drive circuit are connected with ends G and E of the IGBT tube respectively and the other end is connected with an end S2 of the microprocessor. The low-loss arc-free composite multifunctional DC contactor has the advantages of being free of an arc in breaking, short in break time, high in impact current resistance, low in loop loss, small in heat, small in size and the like.
Owner:武汉日新科技照明有限公司
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