133results about How to "Accelerate off" patented technology

The invention relates to a mine liquid-CO2 fire preventing and extinguishing process and device for preventing and extinguishing fire by conveying liquid CO2 to an underground fire zone and injecting a fire zone by using the liquid CO2 and utilizing the liquid CO2 to asphyxiate oxygen in the fire zone, cool, decrease temperature and inertly suppress explosion. A mine liquid-CO2 fire preventing and extinguishing system comprises a liquid CO2 tank car (1), a liquid CO2 storage tank (2), a carburetor (10), a self-pressurization pipeline, a liquid inlet and outlet pipeline, and the like; and the fire preventing and extinguishing device comprises the liquid CO2 storage tank (2), the carburetor (10), the self-pressurization pipeline, the liquid inlet and outlet pipeline, and the like, wherein the self-pressurization pipeline comprises a self-pressurization liquid outlet pipeline and a self-pressurization gas intake pipeline and is combined with the carburetor (10) to form a self-pressurization system so as to realize the self comprehension of pressure in the tank. The invention solves the technical problem of the gasification and icing in the liquid CO2 tank and the pipeline conveying process, realizes safe transfer, storage, transmission and injection and has the advantages of high extinguishment speed, simpleness of operation, low cost, operation stability, remarkable fire extinguishment and prevention effects, wide practicability and the like.

A bottom-contacted top gate thin film transistor (TFT) with enhanced off current suppression is provided, along with an associated fabrication method. The method provided a substrate. Source and drain regions are formed overlying the substrate, each having a channel interface top surface. A channel is interposed between the source and drain, with contact regions immediately overlying the source/drain (S/D) interface top surfaces. A first dielectric layer is conformally deposited. Then, a second dielectric layer is formed overlying the S/D interface top surfaces, with an opening exposing a portion of the first dielectric overlying the channel. A gate is formed overlying the second dielectric layer and the exposed portion of the first dielectric layer.

The related magnetic latching relay with grating sheet comprises: a body; on the body, a moving and fixed contact head, an electromagnetic drive mechanism with permanent magnet to conduct or separate two contact heads. Wherein, some iron grating sheets are set between contact heads along running direction of the moving contact head. This invention generates cathode effect to accelerate arc-extinguishing, and improves performance of the relay.

The invention relates to a double-layer flame-retardant textile fabric and a manufacturing method thereof. The textile fabric is provided with two surface layers, wherein a flame-retardant hot melt adhesive is filled between the layers; the surface layers are formed by interweaving warps and wefts; the warps and the wefts are soaked in a specific flame-retardant chemical agent before weaving; the warps comprise stainless steel fibers, polyester kapok, kapok nylon filaments and 20 D chinlon matt FDY (Fully Drawn Yarn) filaments; the wefts comprise kapok, flax, wool and the 20 D chinlon matt FDY filaments; the cross section of each warp or each weft is flat rectangular, and the stiffness of the fabric can be improved. The warp and weft materials are soaked with the flame-retardant chemical agent, so that an effect for preventing a fire from spreading is realized, a fire retarding agent sprayed on the fabric has a surface inflaming retarding effect, the fire retarding agent is combined with the fabric, so that the fabric can be woven tightly, the air permeability is poor, and the flame-retardant effect of the fabric can be improved; and the manufacturing method of the fabric is simple, and a plurality of the warps and wefts are twisted, so that the stiffness and the impermeability of the fabric are improved.

The invention discloses a miniature circuit breaker with a high breaking capacity, which comprises a shell, wherein the shell is internally provided with a magnet yoke assembly, a moving contact assembly, an arc extinction system and an actuating mechanism. A magnet yoke, a wiring board and a connecting sheet in the magnet yoke assembly are designed into a whole to ensure that the structure of the magnet yoke assembly is simplified, the quantity of soldered dots of the magnet yoke assembly is reduced and the internal resistance of a circuit breaker is lowered; a moving contact in the moving contact assembly comprises a contact support and a contact which are connected, the specific gravity of the contact support is smaller than that of the moving contact, and a magnet conductive plate is additionally arranged on the back of the moving contact and used for accelerating the transfer of an electric arc, therefore, the breaking capacity of the circuit breaker is improved; and a plurality of linkage lug bosses used for multipolar linkage are arranged on a contact support body, thus the linkage performance of the multipole circuit breaker is effectively ensured. A coil is connected with the moving contact through an annealed copper wire in a spot welding manner, and the soldered spots are moved from the linkage lug bosses to the moving contact without influencing the linkage property of the multipole circuit breaker. The invention has the advantages of high breaking capacity, high consistency of the interelectrode linkage and good reliability performance.

The invention relates to a device (1) for protecting an electric installation against overvoltage comprising at least one protection component (10) provided with means for connecting to said electric installation, means for disconnecting the protection component (10) therefrom which are movable from a closed position to an open position, thereby forming an interstitial space (11) between the disconnecting and connecting means in such a way that an electric arc is formed therein. The inventive device is characterised in that it is provided with means (50) which approaches said electric arc from at least two different directions in order to reduce the cross-section thereof. Said invention is used for protecting against overvoltage.

The invention relates to the technical field of flexible direct current output, in particular to a fault processing system of a multi-terminal flexible direct-current transmission line and a control method of the fault processing system. The system comprises a high-voltage direct-current circuit breaker which is connected to the output ends of a flexible direct-current convertor station separately, and further comprises a current-limiting inductor and an energy dissipation circuit, wherein the current-limiting inductor and the energy dissipation circuit are connected between the output end ofthe flexible direct-current converter station and the high-voltage direct-current circuit breaker; the current-limiting inductor is connected with the energy dissipation circuit in parallel, and the current-limiting inductor is used for limiting the fault current; the energy dissipation circuit is used for dissipating energy of the fault current. By means of the method and the device, the effect that the current limiting inductor can better inhibit the peak of the fault current can be achieved, and the rising speed of the fault current is reduced, and the requirements of fault removal on the on-off capacity and the on-off speed of the high-voltage direct-current circuit breaker can be reduced; and an energy absorption resistor and a metal oxide lightning arrester MOA in the high-voltage direct-current circuit breaker jointly dissipate the energy of the fault current, so that the fault current can be accelerated to be extinguished, thereby improving the fault isolation speed.

The invention belongs to the field of high-voltage SF6 circuit breakers, in particular to a gas rotation energy separation type high-voltage SF6 circuit breaker and an energy separation method thereof. The circuit breaker comprises a piston (1), an air cylinder (2), a movable main contact (3), a movable arcing contact (4), a static arcing contact (5), a static main contact (6) and a nozzle (7), wherein a vortex diversion mechanism (8) is fixedly arranged near the end part of the movable arcing contact (4) on the upstream of the nozzle (7), consists of a group of flow deflector units (9) with intersected structures and can consist of a fan blade type flow deflector (16) or a screw type flow deflector (21). By the circuit breaker and the method, SF6 gas which flows out of the air cylinder is subjected to vortex motion, temperature gradient variation along the radial direction is formed in the motion process, and arc energy is quickly dissipated; and the circuit breaker has a high arc temperature reduction speed, a high insulating property, high breaking capacity and high operation reliability and is convenient to mount and maintain.

The invention provides an outdoor lighting device. The outdoor lighting device includes: a light source driving circuit board, on which a light source driving circuit is arranged; a light source board, on which a light emitting diode light source electrically connected to the light source driving circuit is installed, and the light emitting diode light source A plurality of light-emitting diodes are included, and the plurality of light-emitting diodes include small light-incidence-angle light-emitting diodes. The outdoor lighting device has the advantages of simple structure, low micro-current power consumption, no heat generation, strong anti-interference ability to power supply, explosion-proof function, long life without maintenance, good versatility, low cost, long-term lighting does not affect eye health, etc., mainly The performance parameters meet the requirements of relevant national standards, and the produced light-emitting diodes with small beam angles can be used in the lighting system, which greatly reduces the production cost and does not need to discard the light-emitting diodes with small beam angles.

The structure of the moving contact of the high-voltage DC sealed contactor mainly includes the first moving contact piece, the moving contact, the first upper bushing, the electromagnetic drive system, the second upper bushing, the first contact spring and the support washer, each of which passes through The riveting and fasteners and the corresponding fixing holes are connected in sequence; the contact structure adopts a two-way double breakpoint structure, and also includes a second moving contact piece located under the first moving contact piece, and a second moving contact piece set under the second moving contact piece. The supporting adjustment washer on the piece and a second contact spring 1 arranged outside the first contact spring; the first moving contact piece and the second moving contact piece are in double “J” shape. The invention adopts the "J"-shaped structure design of the double-moving contact piece to accelerate the movement and extinguishment of the arc when the contact is disconnected, and reduces the loss of the contact; the use of the moving contact piece and the contact spring structure effectively reduces the ignition between the main contacts. The effective adjustment of arc time, contact wear and contact pressure enables the four breakpoints to be effectively contacted and disconnected, thereby improving product performance and life.

The invention provides a preparation method of an eco-friendly glass fiber wall cloth. Glass fibers are modified and combined with a specially-produced coating. After glass fiber modification, an aluminum-magnesium layer is arranged on the surfaces of the fibers so that combination performances of the fibers and the coating are improved and flame resistance is substantially improved. Through use of silane-modified beta cyclodextrin and a silane coupling agent, bonding properties of the coating and the glass fibers are improved. Through use of micron-order magnesium-aluminum hydrotalcite, flame retardation performances and UV resistance are improved. Through use of titanium dioxide, antibacterial effects are obtained and UV-resistant and shielding agent effects are obtained.

An improved miniature DC circuit breaker, which solves the problems in the prior art that the magnetic energy of the permanent magnet decreases under the high temperature of the arc and affects the reliability of the work. device, handle, locking mechanism, soft connection, moving contact, static contact, outlet terminal and arc extinguishing chamber. The technical points are: a vertically placed The magnetic blowing arc extinguishing device composed of a permanent magnet and two magnetic guide sheets, the N pole of the permanent magnet covered by a heat-insulating sleeve is facing upwards, and the S pole is facing down, which is seamlessly adsorbed on the conductors of the N and S extremes of the permanent magnet. The magnetic sheet and the arc shield made of heat-resistant materials are respectively packaged on the inner side of the insulating base and the insulating cover, and the arc starting angle is connected with the static contact and extended to the bottom of the arc extinguishing chamber. Its compact structure and reasonable design can not only improve the working voltage and arc breaking ability, but also significantly reduce the electrical wear of the contacts and prolong the service life of the contacts.

The invention discloses a breaker with a novel arc extinguishing chamber. The breaker with the novel arc extinguishing chamber comprises the arc extinguishing chamber, a static contact current-conducting plate provided with a static contact embedded in the arc extinguishing chamber, and a movable contact embedded in the arc extinguishing chamber and capable of being connected or disconnected with the static contact; the static contact current-conducting plate is further provided with a magnet yoke, the magnet yoke is formed with an open holding groove, and the movable contact is located in the holding groove of the magnet yoke. According to the breaker with the novel arc extinguishing chamber, the static contact current-conducting plate is provided with the magnet yoke, when there is a short in the circuit, the magnet yoke would generate a magnetic field to increase the magnetic blowout intensity and accelerate the electric arc extinguishing. The movable contact is located in the holding groove of the magnet yoke, and therefore, the magnetic field would be in contact with an electric arc in the largest area, and the electric arc can be extinguished quickly.

The present invention relates to an aerosol generating article (100) having a first section (114) including a combustible heat source (102) and an aerosol-forming substrate(104) and a second section (118) including a tubular element (150) defining a recess (152) at one end of the second section(118). The first and second sections (114, 118) are integrally connected at a region of weakness(122) andare separable at the region of weakness. This enables the tubular element (150) to be placed over the combustible heat source(102), after use of the aerosol generating article, such that the combustible heat source is at least partially received in the recess (152) to reduce the ignition propensity of the smoking article. The first section is upstream of the second section when the first and second sections are integrally connected and the tubular element is at least partially open at both of its ends such that air may be drawn through the tubular element. The tubular element is either at thedownstream end of the second section such that the recess forms a mouth end cavity, or is at the upstream end such that the recess forms a transfer element.

Method is provided for after market conversion of a 4×4 vehicle produced by a manufacturer into a high mobility vehicle having increased maneuverability and on-road and/or off-road capability, relative to the 4×4 vehicle. The 4×4 vehicle has a chassis with a frame, front axle and rear axle, said chassis having a standard wheelbase. The method includes dismounting at least one of the front axle or rear axle from the frame; shortening said frame; and mounting the dismounted axle to the shortened frame so as to obtain a shortened chassis having a shortened wheelbase which is shorter than any standard wheelbase of the line of models produced by the manufacturer.

The invention discloses a universal conversion switch with a magnetic quenching function. The universal conversion switch comprises a square shaft, a contact box, a cam, a movable wafer, a static wafer, a movable contact base and a reset spring. The movable wafer is an elastic metal sheet, and a static contact matched with a movable contact is arranged at one end of the static wafer. According to the universal conversion switch, only one movable contact and static contact pair is arranged in one electric loop, contact and separation of the movable contact and the static contact are conducted by using the reset spring-back pressure of the movable wafer, the separation speed is high, the breaking capacity is high, arcing and burning phenomena are not prone to occurring in the contacts, the stability of the universal conversion switch is improved, and the service life of the universal conversion switch is prolonged. Meanwhile, magnetic steel is arranged at the part, close to the static contact, in the contact box, the magnetic field action direction of the magnetic steel enables electric arcs to move in the moving direction of the movable contact, the magnetic field generated by the magnetic steel enables the electric arcs which may be generated because of large current breaking between the movable contact and the static contact to be lengthened, arc extinguishing is accelerated, and therefore the breaking capacity and the reliability of the universal conversion switch are improved.

The invention relates to the technical field of power distribution cabinets, in particular to a safe and environment-friendly low-voltage power distribution cabinet which is characterized in that a bottom plate is fixedly mounted at the bottom end of a rectangular cylinder, a plurality of uniformly distributed ventilation openings are formed in two corresponding side surfaces of a cabinet body respectively, and connecting plates are fixedly mounted on two sides of each group of adjacent ventilation openings through screws respectively; each connecting plate is fixedly provided with a vertically-arranged U-shaped plate, a sliding plate matched with the two U-shaped plates is inserted between the two U-shaped plates, the inner side face of each sliding plate is fixedly provided with a flexible sealing plate, the inner side faces of the flexible sealing plates make contact with the surface of the cabinet body, and the flexible sealing plates cover all the ventilation openings. The bottomend of each sliding plate is fixedly connected with a lifting movement mechanism, and the two lifting movement mechanisms are in transmission connection to the same driving module. By arranging the flexible sealing plate capable of ascending and descending and the inert gas storage bottle capable of injecting inert gas into the cabinet body, fire extinguishing operation can be automatically conducted, and meanwhile, the fire extinguishing mode is quite environmentally friendly.

The invention provides an indoor lighting device. The indoor lighting device includes: a light source driving circuit board, on which a light source driving circuit is arranged; a light source board, on which an LED light source electrically connected to the light source driving circuit is installed, and the LED light source It includes a plurality of light emitting diodes, and the plurality of light emitting diodes include at least one of a medium beam angle light emitting diode and a large beam angle light emitting diode. The indoor lighting device has the advantages of simple structure, low micro-current power consumption, no heat generation, strong anti-interference ability to power supply, explosion-proof function, long life without maintenance, good versatility, low cost, long-term lighting does not affect eye health, etc., mainly The performance parameters meet the requirements of relevant national standards.

The invention discloses a fault restarting method for a parallel multi-terminal direct-current transmission line. The method comprises: a branch station connected with a faulty direct-current transmission line is selected as a leading station for fault restarting of the direct-current transmission line; all convertor stations control converters to extinguished fault currents and then the leading station is isolated from a terminal station with a VSC converter and a branch station of a terminal system by using switching equipment; and then the main station starts to establish a direct-current transmission line voltage, the connection and power of the whole parallel multi-terminal direct-current transmission system are restored if the direct-current transmission line voltage is established successfully, the faulty direct-current transmission line is isolated if the direct-current transmission line voltage establishment fails, and the connection and power of the rest of parallel multi-terminal direct-current transmission system are restored. With the method disclosed by the invention, after a direct-current transmission line fault occurs, the fault current is extinguished rapidly andthe power supply of the parallel multi-terminal direct-current transmission system is restored to the greatest extent; and the influence of station-to-station communication existence among all convertor stations is avoided.