101 results about "Dielectric gas" patented technology

A new and novel ozone generator with a dual dielectric barrier discharge design is disclosed where high-purity ozone is generated and whose concentration can be varied over a wide range. The simplified design of the ozone generator cell possesses a gas inlet and outlet connected to an annular, sealed dielectric gas envelope that supports both inner and outer electrodes that do not come into contact with the gas. The design eliminates the need for gaskets, o-rings or other methods applied to seal the ozone cell and reduces problems associated with potential interaction resulting from material compatability issues. The applied high voltage is provided by a simple self-resonating, push-pull oscillating circuit whose efficiency is optimized through application of an appropriate impedance matching device. The ozone is concentration is adjusted by varying the pulse width duty cycle of the applied voltage and gas flow rate. The design configuration of the ozone generating cell also eliminates the need for forced air or liquid cooling by natural convective air currents and conductive means.

The invention relates to a multi-stage multi-aperture ceramic dielectric gas fuel inflamer which includes an inflamer shell, a dust-removing wire netting or a metal brush, an air pipeline, a premixing chamber and a fuel gas pipeline. The invention is mainly characterized in that the inflamer shell is divided into an upper part and a lower part with a multi-aperture plate as a boundary. The inner part of the empty cavity at the upper part of the inflamer shell is sequentially provided with a ceramic multi-aperture dielectric of the large-aperture area which is arranged above a ceramic multi-aperture dielectric of the small-aperture area and the ceramic multi-aperture dielectric of the small-aperture area is arranged on the multi-aperture plate. The dust-removing wire netting or the metal brush is arranged under the multi-aperture plate and in the inflamer shell. The multi-aperture plate is imbedded into the middle of the upper and lower parts of the inflamer shell. The surrounding of the multi-aperture plate extends to the outside of the inflamer shell. The invention has the advantage that the multi-stage multi-aperture ceramic dielectric gas fuel inflamer has a higher thermal value range, thereby both the gas of a low thermal value or bum gas fuel and the gas of a higher thermal value can be burnt. The multi-aperture plate added in the inflamer has played a good role of radiating and can effectively prevent backfire or explosion.

A density sensor for monitoring a rate of leakage from the case of electrical switchgear filled with dielectric gas under pressure, the sensor comprising a fixing support mounted from the outside in the thickness of the case and communicating with the dielectric gas. A radiator is placed around the fixing support of the density sensor, thereby enabling a measurement artifact that is due to the exposure of the case and of the sensor to solar radiation to be transformed in such a manner that any risk of untimely crossing of a low density threshold is eliminated.

A relief valve for discharging a dielectric gas between two volumes (V1, V2) of a high-voltage or medium-voltage interrupting chamber. There is used as a closure member a flexible metal blade secured to the body, the closure member therefore being opened by deformation of the flexible blade from a closed position (FIG. 1) in which it is pressed against a closure member seat formed in the body to a fully open position in which it fits closely against a stop member secured to the valve body whilst remaining within its elastic limit, the open passage for the gas being open in this fully open position (FIG. 1A) and the return of the blade from its fully open position to its closed position being possible because of its flexibility.

The invention relates to a hybrid circuit-breaker which, for each pole, comprises a dielectric-gas interrupting chamber (1) which contains a first contact (1A) and a moving second contact (1B) that are disposed longitudinally to a first axis (AA′) and in which the first contact (1A) is connected to a first terminal (3A) of the network, said interrupting chamber (1) being connected in series with a vacuum bottle (2) which contains a fixed contact (2A) and a moving contact (2B) that are disposed longitudinally to a second axis (BB′) and in which the fixed contact (2A) is connected to a second terminal (3B) of the network, actuating means acting via a single control (4) to move said moving contacts between respective open positions and respective closed positions. According to the invention, said actuating means comprise a re-closure arrangement for re-closing the moving contact (2B) of the vacuum bottle, which re-closure arrangement enables said single control (4) to perform such re-closure before the moving contact (1B) of said interrupting chamber reaches its open position.

A limited flash-over electric power switch uses a dielectric gas regulator and a flash-over arrestor to greatly diminish the occurrences of high voltage flash-over during operation of a circuit interrupter. The dielectric gas regulator prevents the flow of the dielectric gas into the arc gap during an initial portion of the opening stroke of the interrupter contacts. Once the arc gap is sufficiently wide to greatly diminish the likelihood of a high voltage flash-over, the dielectric gas regulator allows the dielectric gas to flow into the arc gap to extinguish the arc. The flash-over arrestor snubs out incipient flash-over that may occur as the arc attempts to reform across the arc gap. The flash-over arrestor may be a conductive ring located on the interior surface of the nozzle in the region of the orifice.

A magnetic interrupter consisting of a stationary and moving butt contacts that open an electric circuit in dielectric gas (e.g., SF₆) contained in a sealed, pressurized insulating housing. One or both of the contacts contain a magnet with poles spaced apart in a radial plane perpendicular to the axial direction to spin the arc in the radial plane about the center of the contacts. Permanent magnets may be used to spin the arc so that the magnetic field is not affected by the magnitude of the arcing current, which makes the magnetic interrupter suitable for interrupting currents below fault level currents. One or both of the magnets may also be a field coil and a permanent magnet may be used in combination with a field coil.

A hybrid high-voltage or medium-voltage breaker device includes an enclosure filled with a dielectric gas, a vacuum switch, a gas switch and an operating rod. The vacuum switch includes a fixed first arc contact and a second arc contact which can move in translation in an axial direction of the enclosure. The gas switch includes a fixed or quasi-fixed third arc contact and a fourth arc contact which can move in translation. The operating rod is connected to the fourth contact. The device also includes a connection arrangement for electrically connecting the second and third contacts and a displacement arrangement connected to the connection arrangement and to the rod which separates the second and fourth contacts from the first and third contacts, respectively.

The hybrid-type interrupter device for high or medium voltage comprises: a casing filled with a dielectric gas; a vacuum interrupter having a first arcing contact which is fixed and a second arcing contact which can be moved in translation in the axial direction of the casing; means provided to exert a certain force on the second contact while the vacuum interrupter is allowing current to pass; a gas interrupter having a third arcing contact which is fixed and a fourth arcing contact which can be moved in translation; and a drive rod connected to the fourth contact. The device further comprises: connection means electrically interconnecting the second and third contacts, and capable of being moved in translation together with the second contact; displacement means connected to the connection means and to the rod for displacing them so as to separate the second and fourth contacts from the first and third contacts respectively, said displacement means comprising dead-stroke link means which make it possible to displace the rod over a determined dead stroke while also acting on the connection means to keep the vacuum interrupter closed during this displacement.

An electrical device containing a dielectric fluid, the dielectric fluid comprising heptafluoroisobutyronitrile or 2,3,3,3-tetrafluoro-2-(trifluoromethoxy) propanenitrile.

The invention discloses an experimental device for testing a diffusion coefficient and an osmotic coefficient of an unsaturated dielectric gas. The device mainly comprises a gas-supplying device, a main body reaction device and an outlet gas processing device. The gas-supplying device comprises a water-bath heating device for heating transmitted gas, simulating the temperature generated by landfill refuse degradation and temperature variation generated by the external temperature change; the main body reaction device is composed of three parts of a lower chamber, a middle chamber and an upperchamber, which are used for simulating refuse landfill gas, landfill covering soil (or GCL) and soil sample upper environment. The upper part is loaded to a porous stainless steel plate through an aircylinder to apply pressure to a soil sample (or GCL), so as to simulate the soil pressure at the upper part of the landfill covering soil (or GCL). The outlet gas collecting device is mainly composedof a gas collecting bottle, can be used for collecting and treating the gas after reaction, and the situation that the gas after experiment pollutes the air is avoided. The device is simple in structure and wide in application range.

A capacitor switch including a power contactor and an impedance contactor located within a relatively slender container filled with dielectric gas. The container may be a “dead tank” or an insulator. For the insulator configuration, the switch also includes a conductive cap housing a charging impedance located on the end of the insulator. The power contactor includes a relatively fixed probe contact and a linearly moving socket. The impedance contactor is ring-type butt contactor surrounding the penetrating contactor that includes a retracting (but otherwise fixed) contact that surrounds the fixed probe, and a traveling ring contact that surrounds and moves with the moving socket contact. The impedance contactor closes before the power contactor on the closing stroke to introduce the charging impedance into the circuit. A puffer mechanism retards the expansion of the retracting contact on the opening stroke, which causes the impedance contactor to open before the power contactor.

A power station switch having high nominal current, the switch comprising a break chamber containing a dielectric gas under pressure and mounted inside a protective sheath which may optionally carry a general flow of cooling air, and a radiator/heat-exchanger situated outside said sheath and connected to said break chamber in which said gas under pressure is put into continuous circulation. Said gas under pressure as cooled in the radiator/heat-exchanger is returned to the break chamber via a metal case of the break chamber that is designed to be grounded.

A microwave heating system comprises a microwave applicator cavity; a microwave power supply to deliver power to the applicator cavity; a dielectric support to support a generally planar workpiece; a dielectric gas manifold to supply a controlled flow of inert gas proximate to the periphery of the workpiece to provide differential cooling to the edge relative to the center; a first temperature measuring device configured to measure the temperature near the center of the workpiece; and, a second temperature measuring device configured to measure the temperature near the edge of the workpiece. The gas flow is controlled to minimize the temperature difference from center to edge, and may be recipe driven or controlled in real time, based on the two temperature measurements. The method is particularly useful for monolithic semiconductor wafers, various semiconducting films on substrates, and dielectric films on semiconducting wafers.

A method of measuring the density of a dielectric gas under pressure in a buried metal-clad electricity line consists in measuring the pressure and the temperature of the dielectric gas by means of a sensor mounted on the case of the line, and in compensating the pressure measurement as a function of the temperature measurement using constant density curves that have been corrected on the basis of a curve representing the difference between the temperature at the surface of the case of the line and the mean temperature of the gas inside the line for increasing amounts of current carried by the line conductor.

There is provided a plasma processing apparatus enabling uniform plasma processing over the entire surface of a sample, without causing abnormal discharge even when the electromagnetic field strength is strong as in the case of the inductive coupling method. The plasma processing apparatus includes a process chamber, a first dielectric vacuum window, an inductive coil, a radio-frequency power supply, a gas supply unit, and a sample holder. The gas supply unit includes a second dielectric gas guide plate and a third dielectric island member. The second dielectric gas guide plate is located near below the vacuum window, and has a gas inlet port in the center. The third dielectric island member is provided in a gap between the vacuum window and the gas guide plate. The dielectric constant of the third dielectric is higher than the dielectric constant of the first and second dielectrics.