180results about How to "Quickly turn off" patented technology

The invention discloses a gas injection type parallel gap device. The protection device belongs to the field of lightening protection gap for power transmission lines of alternating-current and direct-current electric power systems. The device is connected with the two ends of a power transmission line insulator chain in parallel, under a lightening stroke, the device is broken down before the insulator chain can be broken down, and thus the insulator chain and the corresponding power transmission line can be protected; moreover, a high-speed high-voltage gas flow can be generated fast and acts on arcs to restrain formation and development of the arcs, the arcs are extinguished in a transient state, and thus the lightning trip-out rate and the lightening accident rate of an electric power system are reduced. The gas injection type parallel gap device comprises arc-control devices on the grounding side and the wire side, fixing devices and parallel spiral fittings installed at the two ends of the insulator train of the line. The arc-control device on the grounding side and the arc-control device on the wire side respectively comprise an arc extinguishing powder storage chamber, an arc air-termination ring, an insulating gas generation chamber, an arc spray channel and the like. With the device, the stability of the electric power system is improved, the on-load action frequency of a breaker is effectively reduced, the service life of electric power equipment such as a transformer is prolonged, and production, operation and maintenance cost is very low.

The invention discloses a compressed air foam extinguishing agent spraying gun and a method thereof. Foam extinguishing agent liquid is sprayed out of an annular spraying channel which is positioned at an inlet of an extinguishing agent spraying gun pipe and is tightly attached to the wall surface to form a flowing liquid film attached to the wall; under impact and cutting of high-speed air flow injected by a convergence-shaped nozzle in the center of the inlet of the extinguishing agent spraying gun pipe, the liquid film is damaged; under the action of surface tension, the liquid film is contracted and wraps compressed air for cutting the liquid film, so that a plurality of air foam balls are generated, and foam extinguishing agent liquid becomes high-speed flowing compressed air foams; and the compressed air foams are accelerated in a 'laval nozzle' type gun pipe and then sprayed at high speed. By the compressed air foam extinguishing agent spraying gun and the method thereof, the compressed air and the foam extinguishing agent are mixed in a gun body to generate the compressed air foam which is sprayed at high speed; fuel fire can be quickly extinguished, and reignition is avoided; fire with the same intensity can be extinguished; and a large number of foam extinguishing agents can be saved.

The invention discloses a compound portable fire extinguisher which is characterized in that: a fire extinguishing agent storage tank is arranged, and a tank port of the fire extinguishing agent storage tank is sealedly connected with a machine head assembly, an internal cavity of the fire extinguishing agent storage tank is provided with a separator plate connected with the bottom of the storage tank and the side surface of the storage tank, the internal cavity of the fire extinguishing agent storage tank is separated into a first cavity and a second cavity by the separator plate, and the upper parts of the first cavity and the second cavity are communicated with each other; a fire extinguishing agent straw system is arranged to form an inverted Y-shaped structure, a mixing cavity is arranged on the upper part, and the bottom of the mixing cavity is in parallel connection with a first fire extinguishing agent straw and a second fire extinguishing agent straw, an end port of the top of the mixing cavity is connected with a fire extinguishing agent inlet connecting pipe of the machine head assembly, and the first fire extinguishing agent straw and the second fire extinguishing agent straw are respectively inserted into the first cavity and the second cavity; the first cavity is used for being filled with 2-bromo-3,3,3-trifluoropropene or perfluorinated hexanone, and the second cavity is filled with water or water containing an inorganic salt additive. The compound portable fire extinguisher is the clean and efficient compound portable fire extinguisher with combination of clean gas and fine water mist.

The invention discloses a fireproof composite cable, which comprises a cable body formed by splicing more than one outer sheath layer and more than one connecting pieces, wherein the connecting piecesare arranged between adjacent outer sheath layers; each outer sheath layer is in fixed contact with the end surfaces of the corresponding connecting pieces; more than one cavity is disposed on the outer sheath layer and surround the outer sheath layer; each cavity is filled with an expansion body; each expansion body is filled with an inert gas; the bottom of each expansion body is provided witha bottom plate layer; more than one compression spring is arranged at the bottom of each bottom plate layer; the bottom of each compression spring is fixedly connected with the bottom surface of the cavity; and the outer end side of each expansion body is provided with a heat conducting piece. The fireproof composite cable, by using a method of thermal expansion, jets out the inert gas and a partof a fire extinguishing agent when there is a fire source in order to quickly extinguish the flame on the outer sheath layer and the surrounding flame, and can achieve one-side jet to realize slow rotation in order to well stay away from the fire source and well extinguish the fire.

The invention discloses a railway rescue station with smoke prevention and exhaust and personnel emergency evacuation functions. The railway rescue station is divided into an upper-layer structure, amiddle-layer structure and a lower-layer structure; the upper layer of the station is a smoke exhaust channel; the middle layer of the station is a rescue station body; the lower layer of the stationis an evacuation channel; a tunnel in the longitudinal range of the railway rescue station is composed of an upper-layer train tracking area and a lower-layer evacuation layer, and smoke exhaust portsare evenly formed in the upper portion of the inner side of a track of the upper-layer train tracking area; each smoke exhaust port is internally provided with a remote control smoke exhaust air valve; each smoke exhaust port is provided with a fire smoke detection module; the opposite sides of each smoke exhaust port are provided with directional jet fans; the upper portion of the train trackingarea is provided with mobile jet fan groups and movable fire extinguishing bins separately; escape staircases are arranged between the upper-layer train tracking area and the lower-layer evacuation layer. The railway rescue station mainly solves the problem that an evacuation platform cannot be arranged on a conventional rescue station for two two-hole single-line tunnel with short transverse distance, and the efficiency of smoke exhaust and personnel evacuation is improved.

The invention discloses a double-aerosol-extinguishant spraying device which comprises a high-shooting-speed fan or an aero-gas turbine, an aerosol extinguishant spraying tube, a water supply ring, a foamite supply ring, a superfine dry powder extinguishing agent spraying gun, a superfine water mist spraying nozzle, a foamite spraying nozzle, a first solenoid valve, a second solenoid valve and a third solenoid valve. The double-aerosol-extinguishant spraying device achieves mass flow and high-shooting-speed spraying. Double-aerosol-extinguishant jet flow sprayed by the double-aerosol-extinguishant spraying device is sprayed into an internal space of a building on fire, aerosol extinguishants are rapidly dispersed to generate a 'totally flooding' state and enter the interior of flames under the action of entrainment airflow of the flames, and consequently a fire in the building can be rapidly put out, and the flames are prevented from reburning.

The invention discloses an automatic fire extinguishing device suitable for a small power distribution cabinet. The device comprises a fixing box. A cylindrical barrel is fixedly mounted on the innertop wall of the fixed box. The bottom end of the cylindrical barrel is fixedly connected with a conical barrel. The bottom of the cylindrical barrel penetrates through the bottom wall of the fixed boxand extends to the outer side of the fixed box. A plurality of first storage boxes, a plurality of second storage boxes and a plurality of heat-resisting pipelines are symmetrically arranged on the inner side wall of the fixing box, each first storage box is provided with an opening mechanism and communicates with the corresponding heat-resisting pipeline through the opening mechanism, and an isolation mechanism is arranged in the cylindrical barrel. The fire extinguishing device is reasonable in structure, easy to install and suitable for small power distribution cabinets of various specifications. The device can automatically extinguish fire at the fire occurrence position at the initial stage of fire or in the smoldering state of an object, does not need manual monitoring, omits the process that managers discover the fire and find fire extinguishing device, and can remarkably reduce adverse effects caused by the fire.

A super-capacity lithium ion battery pack with a heat-transfer oil circulating radiating device mainly comprises a battery pack box body, a radiating pipe, a fin, lithium ion batteries and an oil conservator, wherein the battery pack box body adopts a full-oil charge seal type structure; the metal bellows expansion oil conservator is arranged at the top of the box body and is communicated with the battery pack box body through a guide pipe; clamping grooves are uniformly, internally and correspondingly formed in the top and bottom of the battery pack box body; each lithium ion battery is clamped between the clamping grooves which correspond up and down to keep vertical and stable; the fin is connected with the periphery of the battery pack box body; the connectors of the radiating pipe are respectively arranged at the upper and the lower end of the fin and communicated with the battery pack box body; under the heating, the heat-transfer oil forms a natural circulation convection in the battery pack box body. The lithium ion battery pack has a simple structure; the heat-transfer oil can serve as not only a cooling medium, but also an insulator, can continuously flow in the closed battery pack box body and the radiating pipe, without being corroded by moisture, is high in radiating, and can ensure the normal working of the super-capacity lithium ion battery pack.

The invention relates to a lifting type fire protection and fire extinguishing hood comprising an elevated platform, a canopy opening and closing support and a fire extinguishing canopy. The elevatedplatform is erected above fire protection equipment and is provided with a canopy lifting machine, the canopy opening and closing support includes a canopy roof main frame, a frame body opening and closing machine and a plurality of opening and closing supporting rods, a tubular lifting frame is connected with the canopy roof main frame, the frame body opening and closing machine is installed in an inner cavity of the canopy roof main frame and is provided with a rotating screw, the fire extinguishing canopy is of a circular canopy structure and is installed outside the canopy opening and closing support in a sleeving manner, a retractable skirt cover is arranged at the bottom of the fire extinguishing canopy, and a high-pressure gas tank is arranged on the elevated platform. According tothe embodiment, a fire extinguishing blanket and fire extinguishing gas are used in cooperation, once the fire protection equipment catches a fire, the canopy lifting machine and the frame body opening and closing machine can immediately support and open the fire extinguishing canopy, the equipment catching the fire is covered with the fire extinguishing canopy, meanwhile, the fire extinguishing gas is jetted into the fire extinguishing canopy, and a flame on the equipment catching the fire is quickly extinguished.

The invention relates to a high-voltage direct-current contactor which is suitable for medium load systems in electrical power, metallurgy, mines, petroleum, traffic transportation and the like, and is especially suitable for a capacitor charging loop on an electric locomotive converter. The high-voltage direct-current contactor comprises an engine part, an electromagnetic drive part, a transmission part, a magnetic blow-out part, an auxiliary contact and an arc extinguish chamber, wherein the engine part is provided with a base, a main frame and a main frame cover plate; the transmission part is provide with a push rod, a reset spring, a rotary rack, a moving main contact and a moving arc contact; the electromagnetic drive part is provided with a cylindrical yoke, a movable iron core and a coil, and a lining is arranged between the cylindrical yoke and the movable iron core; and the magnetic blow-out part is provided with an iron core, a magnetic conducting iron plate, a magnetic blow-out coil, a static arc contact, an upper connecting copper bar and a static main contact. The high-voltage direct-current contactor has the advantages of long electric service life, high breaking speed, strong shock resistance capacity, compact structure, small volume, good tightness and the like, and is convenient in assembly and maintenance.

The present invention provides a DC circuit breaker arc extinguishing chamber which comprises a shell with a mounting inner cavity and a plurality of metal gates which are installed in the mounting inner cavity side by side. An arc extinguishing space with two through ends is formed between any two adjacent metal gates. The shell also comprises a containing inner cavity for containing DC circuit breaker moving and static contacts, and the containing inner cavity communicates with one end of the arc extinguishing space. The shell side wall which forms the containing inner cavity is also provided with a first magnetic shield plate for shielding a magnetic field. When the moving and static contacts of the DC circuit breaker are disconnected to generate an electric arc, the first magnetic shield plate can protect the electric arc from being interrupted by an external magnetic field, the magnetic field generated at moving and static contact positions is gathered in the containing inner cavity such that the electric arc is rapidly and stably driven to the metal gates to extinguish the arc under the effect of the magnetic field generated at moving and static contact positions, and thus the stability of arc extinguishment is improved.

The invention discloses a battery connector, a battery module and an electric vehicle. The battery connector comprises a connecting sheet and a protecting assembly, wherein the connecting sheet is provided with a fuse part; the cross sectional area of the fuse part is smaller than that of the rest part; and the protecting assembly coats the outside of the fuse part. According to the battery connector of the electric vehicle disclosed by the embodiment of the invention, the fuse part of which the cross sectional area is smaller than that of the rest part is arranged on the connecting sheet; and the protecting assembly coats the outside of the fuse part, so that connection between batteries can be achieved; when a control circuit is abnormal, the connection between the batteries is timely cut off; the battery connector can play a protecting role in the batteries; an electric arc generated by fusing can be quickly extinguished; the risks of combustion, explosion and the like due to the fact that the electric arc breaks through the batteries are prevented; a potential safety hazard to a passenger can be avoided; and meanwhile, the protecting assembly can also support the housing ofthe fuse part to strengthen the connection reliability of the fuse part, so that the reliability of the connecting sheet is increased.

The invention discloses a fireproof type AC low-voltage power distribution cabinet which comprises a cabinet body rack. A hanging ring and ground legs are arranged at the top end and the bottom end of the cabinet body rack respectively. An instrument door is arranged on the front face of the side wall of the cabinet body rack, and instruments, buttons and a main switch are arranged on the surface of the instrument door. A smog sensing head and a nozzle are arranged in the middle of the top end of an inner cavity of the cabinet body rack. A partition plate is arranged in the cavity of the cabinet body rack. A control module and an extinguishing material storage tank are arranged at the rear end of the inside of the cabinet body rack, and the nozzle is connected with the extinguishing material storage tank through a guide tube. A waterproof slope is movably mounted at the top end of the cabinet body rack. According to the fireproof type AC low-voltage power distribution cabinet, fires can be found by the smog sensing head as soon as possible, and a fire extinguishing apparatus is used for extinguishing; meanwhile, the control module is powered off so that electric shock can be avoided, damage to peripheral facilities due to fact that extinguishing is not achieved in time can be prevented, and peripheral safety can be better guaranteed; meanwhile, the waterproof slope can effectively prevent sewage from corroding the power distribution cabinet, and thus fires caused by short circuit can be prevented.

The invention discloses a solid-phase type line span center lightning stroke flashover arc extinguishing lightning arrester. The solid-phase type line span center lightning stroke flashover arc extinguishing lightning arrester comprises lightning protection lines (3), conductive wires (6) and arc extinguishing lightning arresters (4); the arc extinguishing lightning arresters (4) are fixed at the span centers of lightning protection lines (3) and the conductive wires (6) respectively in pairs or at different positions of the spans of the lightning protection lines (3) and the conductive wires (6); and a pair of arc extinguishing lightning arresters (4) on each lightning protection line (3) and each conductive wire (6) form an arc extinguishing lightning protection gap between the lightning protection line and the conductive wire. As the solid-phase type arc extinguishing lightning protection technology is adopted, arc extinguishing becomes faster and more efficient, arc extinguishing energy packages have huge energy and can extinguish big arc rapidly and exactly; the arc extinguishing energy packages inside the span center lightning stroke flashover arc extinguishing lightning arrester can be converted automatically, so that effective actions under the condition of multiple lightning strokes are realized; an upper cover can be dismantled, so that the arc extinguishing energy packages can be replaced and repeated use is realized; the solid-phase type line span center lightning stroke flashover arc extinguishing lightning arrester is light in weight and convenient to install, cannot result in excessive bearing burden for the original conductive wires, the original lightning protection lines, and the original poles and towers, and is relatively strong in practicability.

The invention relates to a bipolar DC contactor which is widely used in the electricity, the metallurgy, the mine, the petroleum and the traffic transportation and other heavy load systems, especially in the main traction loop on an electric locomotive, comprising an insulating frame part, a transmission part, an electromagnetic driving part, a serial magnetic blow-out part, an arc extinction system and a subsidiary loop, wherein the insulating frame part includes a static contact wallboard, an incoming line bus bar insulating wallboard and a movable contact insulating wallboard; the transmission part comprises an armature, a movable contact insulating wallboard and a movable contact; the electromagnetic driving part includes a driving coil, an iron core and an armature; the serial magnetic blow-out part includes a magnetic blow-out iron core, a magnetic blow-out coil, a stainless steel electrode, a static contact arc leading angle and a static main contact; the air extinction system comprises an air extinction chamber and a ceramic grid; the subsidiary loop is provided with a module type quick-action switch. The invention has the advantages of long service life, rapid breaking speed, stable breaking arc voltage, self-clean contact, arc leading passage, compact structure, few safety misadventures and convenient installation and maintenance.

The invention relates to the technical field of new energy automobile equipment, and discloses a battery compartment throwing structure of a battery replacement type electric automobile, which comprises a chassis, a battery compartment is embedded in the bottom of the chassis, an exhaust pipe is arranged on one side of the battery compartment, and a sensor for monitoring whether a battery burns ornot is arranged in the battery compartment. According to the battery compartment throwing structure of the battery replacement type electric automobile, when it is detected that a battery spontaneously combusts, a large amount of nitrogen is instantly released through ignition of the gas production device, the battery compartment and the connecting compartment are integrally thrown out through rapid change of air pressure, and the situation that the battery is on fire to ignite the automobile, and consequently larger personnel and property losses are caused is avoided, and moreover, open firecan be rapidly extinguished, meanwhile, the temperature in the battery bin is restrained, secondary reburning of the battery is effectively avoided, enough time is reserved for throwing out of the battery, after the battery is thrown out, the battery is far away from a vehicle and is not completely separated from the vehicle, the throwing-out position of the battery can be conveniently controlled, and extra influences are reduced.

The invention discloses an operating device of a disconnecting switch and the disconnecting switch with the operating device. The operating device comprises a shell and a grounding operating mechanism. The grounding operating mechanism comprises a grounding operating shaft, a grounding transmission shaft, a transmission mechanism, a first elastic part, a driving part and a locking mechanism. The locking mechanism locks a driving arm after grounding switching-off is completed, and the driving part rotates forwards to a set position to unlock locking cooperation of the locking mechanism and thedriving arm. When the grounding operating mechanism is switched off, locking cooperation is formed between the driving arm and the locking mechanism, the transmission mechanism keeps the switched-offposition locked, and the effect of switching-off in-place limiting is achieved. When the grounding operating mechanism is switched on, the driving arm is locked at the switching-on front half way, thefirst elastic part keeps energy storage and starts to release energy after the driving arm and the locking mechanism are unlocked, and rapid switching-on is achieved. The grounding operating mechanism has a limiting keeping function during switching-off and an energy storage keeping function during switching-on.

The invention discloses an ashtray with a screw cover. The ashtray comprises an ashtray body and a screw cover body. A U-shaped groove is formed in the center of the ashtray body, the screw cover body corresponds to the U-shaped groove and comprises an end seat cover and a rotary handle, the rotary handle protrudes out of the upper end of the end seat cover, and a cigarette plugging extinguishing channel is arranged on the rotary handle. In this way, the U-shaped groove of the ashtray body can be sealed through the screw cover body after being filled with water, a cigarette end with sparks passes through the cigarette plugging extinguishing channel on the screw cover body to be plugged into the U-shaped groove to be extinguished and stored, the cigarette end is extinguished fast, and the water in the U-shaped groove is not prone to splashing.

The invention discloses a high-voltage electrical connector, which comprises a first contact member and a second contact member, wherein the first contact member and the second contact member are bothprovided with a contact region and a combustion region; The second contact part is fixed in the base of the plug, the first contact part is fixed in the socket, and the first contact part is providedwith a spring; Forming a double contact structure between the first contact member and the second contact member; A low-stress nickel layer is electroplated on that contact area, and a noble metal layer is electroplated on the low-stress nickel layer; A low-stress nickel layer, a noble metal layer and a tungsten-nickel alloy layer are sequentially plated on that combustion zone. The surface coating of the connector provided by the invention has good arc ablation resistance, low cost, allows live plug-in and pull-out of large-current silver plating or gold plating connectors, has firm combination between the plating layers, good arc ablation resistance and low cost, and meets the requirements of arc generation prevention and arc burn resistance for live plug-in and pull-out of large-current under large voltage.

The invention discloses a lamp tube capable of being compatible with a high frequency and a power frequency, which comprises a safety protection circuit, a rectification circuit, an LED driving circuit, an electronic ballast driving circuit A, a leakage current detection protection circuit B1 and an on-site IC driving circuit B2, wherein the safety protection circuit is respectively connected withan input end L and an input end N, the safety protection circuit is also respectively connected with the rectification circuit, the leakage current detection protection circuit B1 and the electronicballast driving circuit A, and the rectification circuit is connected with the on-site IC driving circuit B2. The invention further discloses an implementation method of the lamp tube capable of beingcompatible with the high frequency and the power frequency. According to the invention, the leakage current detection protection circuit B1 is arranged, and due to the fact that the lamp tube is powered on from two ends, the safety of the lamp tube in the dismounting and mounting process is guaranteed; and the on-site IC driving circuit B2 is arranged, unwanted harmonic components in the rectified output current are filtered out, and the constant current is output through oscillation of the on-site IC and a peripheral circuit thereof.

The invention discloses an automotive trim flame-resistant material and a preparing method thereof. The material comprises, by weight, 50-80 parts of polypropylene resin, 20-60 parts of anilmomethyl triethoxy silane, 10-40 parts of glass fiber reinforced polyethylene terephthalate, 20-30 parts of N-ethyl-p-toluenesulfonamide, 40-50 parts of barium sulfate, 40-50 parts of polyvinyl alcohol, 10-30 parts of dimethyl terephthalate, 20-60 parts of paraformaldehyde, 40-50 parts of arsenic trioxide, 2-8 parts of potassium oxide, 10-20 parts of dicyanodiamine, and 20-40 parts of adipic acid dihydrazide. According to the preparing method, the polypropylene resin, the anilmomethyl triethoxy silane, the glass fiber reinforced polyethylene terephthalate, the N-ethyl-p-toluenesulfonamide, the barium sulfate, the polyvinyl alcohol, the paraformaldehyde, the arsenic trioxide, the potassium oxide, the dicyanodiamine and the adipic acid dihydrazide are evenly mixed through a high-speed mixing machine for plasticizing fusion, dimethyl terephthalate injection is conducted at the same time, and the constituents are extruded after being mixed. The flame resistance of the automotive trim flame-resistant material is high.

The invention discloses a power supply processing device, which comprises an input port, an output port, a power supply converting module and a discharging module, wherein the input port is used for connecting with a power supply; the output port is used for connecting with at least one light-emitting diode; the power supply converting module is connected with the input port and the output port, and is provided with an equivalent capacitor which is connected in parallel with the light-emitting diode; the power supply converting module is used for receiving the power supply and converting into electric energy of a preset voltage or current form, and outputting to the light-emitting diode through the output port; the discharging module is connected with the power supply converting module, and is provided with a resistor; when the power supply is used for supplying power to the power supply converting module, the discharging module is used for controlling the resistor of the discharging module to be disconnected from the equivalent capacitor; and when the power supply stops supplying power to the power supply converting module, the discharging module is used for controlling the resistor of the discharging module to be connected in parallel with the equivalent capacitor.

The invention describes a miniature circuit breaker, which is characterized in that: the miniature circuit breaker comprises a torsional stretch dual-breaker arc extinguishing system, a linkage transmission mechanism and a tripping mechanism, which are arranged in a same axis, wherein the torsional stretch dual-breaker arc extinguishing system comprises a disc-shaped stationary contact and a disc-shaped moving contact which are provided in the same axis; a movement of the linkage transmission mechanism acts on the disc-shaped moving contact so as to enable the disc-shaped moving contact to simultaneously rotate and translate with respect to the disc-shaped stationary contact; under the action of the tripping mechanism, the disc-shaped stationary contact and the disc-shaped moving contact can be in a locked state or a tripped state.

The invention discloses a lightning protection device, which comprises a rotary arc extinguishing electrode, wherein the rotary arc extinguishing electrode comprises a ceramic shell; a transition electrode is fixedly inserted into the top of a rotary connecting rod; the rotary connecting rod is located in the ceramic shell and is fixedly sleeved with a rotary matching gear; the rotary matching gear is movably matched with telescopic racks arranged on the two sides; fixing plates extruding an air bag on the two sides are communicated with an air leakage ring through hollow connecting rods; theair leakage ring is communicated with an air passage of the rotary connecting rod through a passage formed inside; an arc blowing channel is formed in the transition electrode; a plurality of arc blowing holes are respectively formed in two ends of the transition electrode; and a pair of bimetal isolation sheets are fixedly mounted in the air passage of the rotary connecting rod. According to thelightning protection device, rapid extinguishing of electric arcs is achieved in a mixed arc extinguishing mode, the safety of an electric power system is guaranteed, manual intervention and an external power source are not needed, and the device is energy-saving, environmentally friendly, intelligent, practical and suitable for being widely popularized in the electric power system.

The invention belongs to the technical field of power circuit breakers, specially relates to a mechanical extrusion-type arc-extinguishing mechanism for a power circuit breaker. The arc-extinguishing mechanism includes a pressure bar, an electrical pendulum rod, an electrical fixed end, compression boards, a trigger lever, a pinch bar, a bottom conductive board and an upper conductive board. When the electrical pendulum rod is separated with the electrical fixed end, an electric arc is produced. Then the electric arc moves to the compression boards. At the same time, the electrical pendulum rod makes the trigger lever to move downward such that the trigger lever provides a downward force to the pinch bar. As a result, the pinch bar moves upwards and provides an upward force to the bottom conductive board. Then the bottom conductive board moves upwards along conductive board guide rails , which makes heat transfer cross-sectional area and heat storage capacity increased such that the electric arc is easier to be extinguished. When the pressure bar begins to move, the elastic end of the pressure bar is deformed. The deformation force produces time-delayed compression on the compression boards. When the electric arc enters into the spaces among the five compression boards, the electric arc is divided into four sections by the compression boards. At the same time, the distances between the compression boards are decreased therefore electric arc energy is released rapidly through the compression boards such that the electric arc is extinguished in short time. The mechanical extrusion-type arc-extinguishing mechanism has good arc extinguishing effect.

The invention belongs to the field of fire protection, particularly relates to an automatic fire extinguishing device suitable for electrical equipment. The automatic fire extinguishing device provides the following scheme aiming at the problems that an existing fire extinguishing device is generally heavier, so that the fire extinguishing device cannot be moved to a fire place in time under the emergency conditions of open fire and the like, and the use is more troublesome. The automatic fire extinguishing device comprises a base, two supporting shafts are symmetrically and rotationally connected to one side of the bottom of the base, wheels are fixedly installed at the bottom ends of the two supporting shafts, two wheels the same as the wheels on the supporting shafts are symmetrically and fixedly installed on the other side of the bottom of the base, and a swing rod is rotationally connected to the bottom of the base. By pushing a steering lever, the device can be conveniently moved, the moving direction of the device can be conveniently changed, meanwhile, when open fire is extinguished, the spraying directions of the multiple spraying pipes can be adjusted, rapid fire extinguishing can be achieved, and therefore good use convenience is achieved.

The invention provides a fire extinguishing system based on sound wave fire extinguishing and a fire extinguishing method thereof. The fire extinguishing system based on sound wave fire extinguishing comprises a waveform generator used for generating low-frequency sound wave analog electric signals, a power amplifier used for amplifying the low-frequency sound wave analog electric signals, an electro-acoustic transducer used for converting the amplified low-frequency sound wave analog electric signals into low-frequency longitudinal waves and directionally transmitting the low-frequency longitudinal waves in the transverse direction, and a partition body used for reflecting the low-frequency longitudinal waves to form a superposed sound field and carrying out reflection enhancement on the transmitted longitudinal waves in the advancing direction of the low-frequency longitudinal waves. A stable superposed sound field is formed in the interval space between the electro-acoustic transducer and the partition body, and a high pressure gradient generated in the superposed sound field can cause a transverse density difference at the moving position of the moving flame, so that the flame of the moving flame transversely deviates from a fuel area, the flame is quickly extinguished in the superposed sound field, and spreading and secondary ignition of moving flames are prevented.

An electromechanical switching device according to the present invention has a switch contact used for interrupting an electrical line, and an arc extinguishing device for extinguishing an arc generated during opening of an energized switch contact. The arc extinguishing device has a first permanent magnet and a second permanent magnet which are arranged opposite to each other at two sides of the switch contact and are magnetized in opposite directions in the way of repelling each other. A magnetic field which is superimposed with the arc generated during opening of the energized switch contact is generated through the first permanent magnet and the second permanent magnet. The resulting magnetic field exerts an electromagnetic force on the arc, while the force vector of the electromagnetic force is depended on the polarity of a current. The force vector always has a directional component regardless of the polarity of the arc, the directional component pushes the arc away from the switch contact. The arc extinguishing device and the switching device with the arc extinguishing device can be used for both DC and AC.

The invention provides an electrical switch rotation structure. The rotation structure comprises an upper cover, the upper cover is provided with a switch knob rod penetrating the upper cover, the switch knob rod is successively sleeved by a push plate and a limiting connection portion, the push plate and the switch knob rod are fixed, the limiting connection portion can move axially relative to the switch knob rod while rotating about the axis of the switch knob rod, and the circumference of the limiting connection portion and the circumference of the push plate are connected through multiple traction springs. The electrical switch rotation structure, through the design of traction by the multiple springs, a sufficient spring elastic force is generated, rapid rotation of the limiting connection portion is realized, an electrical switch contact sheet is driven to move rapidly, the opening time of the contact sheet is shortened, arcs are rapidly extinguished, and the springs with different elastic forces and materials with different strengths are selected along with the different electric power needing to be cut off so that convenience is provided for application of the product to different power occasions.