44results about How to "Reduce overpressure" patented technology

A valve arrangement for a pipeline protection system comprises a plurality of barrier valves in series with each other for coupling in a pipeline, wherein the valves are received in a metallic block.

The invention relates to a flexible packaging container that is made of plastic, wherein a region comprising an interior wall and an exterior wall is formed by means of sealed or glued seams. The interior wall is provided with one or more openings which allow gas to escape from the interior region of the container and to enter into the region between the interior and exterior walls, and the sealed or glued seams enclosing said region are, at least in a partial region, formed such that they allow gas to escape.

The invention discloses a system and a method for stabilizing frequency and voltage of the system during large load phase step of the isolated power grid system. The method includes: S1, increasing evaporation capacity of a boiler, starting a bypass system to maintain stability of steam pressure and automatically regulating opening of a bypass valve via a pressure control mode; and S2, opening a regulating valve of a steam turbine after a DEH (digital electric hydraulic) speed regulating system detects that the rotation speed of a generator set is reduced, and simultaneously reducing the opening of the bypass valve under a pressure feedback effect of the bypass system. By the aid of a large-capacity energy storage effect of the bypass system, the bypass valve is opened quickly, load of the boiler is reduced, and the system is protected against being in an over-voltage state; the bypass valve is closed quickly, output power of the generator set is quickly adjusted, large motor load is carried, balance of total power supply quantity is realized, and accordingly an isolated power grid outputs current with stable frequency and voltage under the condition of large load phase step; and required high power electric energy does not need to be outputted in advance, heat dissipation of the generator set of the isolated power grid can be realized effectively, debugging of the set is carried out conveniently, and cost is saved.

A method checks the operability of a tank-venting system for a motor vehicle having an internal combustion engine. The tank-venting system includes a fuel tank (10), an adsorption filter (20) and a filter line (12) connecting the adsorption filter to the fuel tank. The adsorption filter (20) has a venting line (22) and a switchover/check valve (70) is provided for closing off the venting line (22). The system includes a tank-venting valve (90) and a valve line (24) connecting the tank-venting valve to the adsorption filter. In the method, an overpressure relative to atmospheric pressure is introduced into the tank-venting system utilizing a drivable pressure source (50). An operating characteristic variable of the pressure source is detected while introducing the overpressure to determine the pressure course. A conclusion is drawn as to the presence of a leak from the pressure course. The overpressure is reduced by opening the tank-venting valve (90) and simultaneously closing said switchover/check valve (70).

The invention discloses a composting method of a dovetail groove metal plate clearance fit interface. The compositing method is realized through the explosive cladding method, the rolling method and the like. According to the method, after a base plate with dovetail grooves and a surface plate with dovetail grooves are in interference fit, the base plate and the surface plate are composited together through combination of a metallurgical bonding mode and a squeezing meshing mode of the dovetail grooves under the actions of energy of explosives or a rolling mechanism. Physical and chemical properties of metal sheets on the two sides of a dovetail groove combination interface are not changed, and large-area metal sheet composition can be conducted; the explosive charge for a unit of compositing area is small, and atmospheric pollution, noise pollution, explosion vibration and overpressure are reduced; during explosive welding of the metal sheets with the dovetail grooves, no boundary effect exists, the compositing effect on the periphery is good, and the lower limit and the upper limit of an explosive welding window are both increased. The compositing technology of the dovetail groove metal plate clearance fit interface can be applied to the fields such as chemical reaction containers and ships so as to meet the requirement for large-area metal composite plates.

The invention discloses a de-noising and dust removal blast hole stemming method for drilling blasting of earth and stone in urban and rural areas. According to the method, a stemming section comprises a bottom water bag, a middle inverted funnel and a conventional stemming material, the water bag is tied down by a traction rope and is lifted into a hole, the other end of the traction rope is tied to a bearing bar of an orifice of a blast hole, and the edge of the inverted funnel is clamped on the wall of the blast hole to be fixed. Most of shock wave energy generated by explosion can be converted into internal energy required by water vaporization and atomization and kinetic energy of water jet so as to weaken noise; meanwhile, the blasting dust can be wrapped by dispersed water mist to reduce pollution; and in addition, after the water bag is broken, the lower part of the funnel is filled with water, so that the strength of shock waves is indirectly reduced, the stemming time is prolonged, and the stemming effect is enhanced. The method provided by the invention can also be used in rock blasting construction of mines, water and electricity, traffic and other fields.

The invention provides an explosive cladding method for a groove type hot melt interface of a metal plate and an explosive device. According to the method, grooves are formed in the surface of a metal base plate at first, the grooved interface is cleaned up, raw materials of a covering plate are melted in a high-temperature furnace, a part of melted liquid flows into groove cavities, under the thermal action of the high-temperature liquid and the mechanical action of the grooves, primary combining of the covering plate and the base plate is achieved, then the covering plate is further squeezed into the grooves through an explosive method, the base plate and the covering plate squeeze each other and are combined closely, and tight combining force is achieved on the interface of the two metal plates. According to the explosive cladding method and the explosive device, the amount of explosives in unit area is small, a honeycomb aluminum explosive loading structure is adopted, the explosive amount and the cladding time can be saved, and meanwhile, atmospheric pollution, noise pollution, vibration and overpressure are reduced.

The invention discloses a fully sealed composite explosion-proof container comprising an end cover component and a container body. The end cover component is engaged and connected with the container body through a multi-tooth structure, and the end cover component comprises a cover plate of which the lower part is provided with a stainless steel jacket; the stainless steel jacket is internally provided with a high density aluminum foam layer, a separating plate, a low density aluminum foam layer and a spherical film from bottom to top in sequence; and the container body comprises a composite outer layer of which the interior is a metal inner barrel, and the upper part of the metal inner barrel is provided with an annular aluminum foam layer of which the bottom is provided with a separatingplate layer. According to the fully sealed composite explosion-proof container provided by the invention, the barrel is wound by carbon fiber reinforced epoxy resin matrix composites; and the structural strength is high, and the weight is light. The explosion-proof container has the advantages of the simple structure, quick opening and closure, reliable sealing and no fire phenomenon during explosion; the overpressure within the 30cm radius of the opening part is low, and less 20 kPa than the threshold that a human body can bear; and the explosion-proof container is light in weight, and can be handled by one person easily.

The invention relates to an explosion-proof double-layer high-pressure hydrogen storage tank. A tank body of the tank comprises an inner tank and an outer tank which are integrally connected by tank holders; an interlayer between the inner tank and the outer tank is filled with an explosion inhibitor, and the interlayer is provided with an explosion inhibitor inlet and an explosion inhibitor outlet; the inner tank is connected with the outer tank by a pipeline which leads to the outside of the tank, and the pipeline is separated from the interlayer. The storage tank is mainly used for storinghigh-pressure hydrogen. The storage tank can effectively prevent spontaneous combustion of high-pressure hydrogen due to accidental leakage and inhibit gas cloud explosion, and has simple structure and obvious economic advantage.

The invention relates to the technical field of valve design, and specifically discloses a pilot operated safety valve for high-temperature working conditions. The pilot operated safety valve for the high-temperature working conditions comprises a main valve, a pilot valve and a heat exchange device, wherein the pilot valve is connected with one end of the heat exchange device, a gas chamber of the main valve and the valve body cavity of the main valve through pressure pipes respectively, and the other end of the heat exchange device is connected with a dipper-shaped pipe arranged at the main valve through a pressure pipe. According to the pilot operated safety valve for the high-temperature working conditions, an inlet seal structure is designed in the pilot valve so as to prevent a medium from entering the gas chamber of the main valve through the pilot valve, and an outlet seal structure is designed in the pilot valve so as to prevent a medium in the gas chamber of the main valve from entering the outlet of the pilot valve; in addition, a metal hard seal structure is adopted in the sealing surface of the main valve, a valve flap of the main valve is mounted on a recoil plate and can swing slightly, and when the main valve is closed, the valve flap of the main valve can be automatically calibrated so as to improve the sealing performance of the main valve while the problem of high-temperature seal of the main valve is solved.

A carbonator for a beverage dispenser is characterized by a carbonator tank that is placed at a generally inaccessible first location in the beverage dispenser. Liquid and CO₂ are supplied to the tank to carbonate liquid in the tank and carbonated liquid at an outlet from the tank is delivered to a beverage dispensing valve. To control delivery of liquid to the carbonator tank and thereby the level of liquid in the tank, a liquid level sensor is fluid coupled to an interior of the tank and is placed in the beverage dispenser at a generally accessible second location that is remote from the first location and from the tank. Placement of the liquid level sensor remote from the carbonator tank and at an accessible location facilitates its repair and replacement.

Systems and methods for reducing an overpressure caused by an explosion of a vapor cloud are provided. In one or more embodiments, the system can include one or more sensors operable to detect the explosion of the vapor cloud. The system can also include one or more igniters operable to ignite the vapor cloud at locations throughout, after the explosion of the vapor cloud is detected, to provide a discrete combustion zone at each location. Each combustion zone can form a discrete pressure wave, thereby reducing the overpressure caused by the explosion of the vapor cloud.

The invention relates to the field of gas treatment, in particular to a liquid storage tank tail gas treatment system and method. The liquid storage tank tail gas treatment system comprises a purification unit, a pressure regulating unit, a tail gas treatment unit and a control unit, the purification unit communicates with the top of a liquid storage tank, and the pressure regulating unit comprises a gas extracting device and a gas supplementing device; and the gas extracting device communicates with the purification unit, the gas supplementing device communicates with the top of the liquid storage tank, the tail gas treatment unit comprises a tail gas recovery device and a tail gas incineration device which are arranged in parallel, and the control unit comprises a first controller and a second controller. According to the liquid storage tank tail gas treatment system, the whole-course closed recovery of tail gas at the top of a sulfur-containing sewage tank of a petrochemical refinery plant, the safety control of the liquid storage tank and the recovery of high-value light hydrocarbon are realized, the effect is remarkable effect, and the liquid storage tank tail gas treatment system can be applied and popularized in similar devices in petrochemical industry, coal chemical industry and the like.

The invention provides a fuel-supply system. The invention aims to realize a fact that a pressure control part can properly control a fuel pressure before reception of a target fuel pressure from a control device. The fuel-supply system is provided with the components of a fuel pump which is driven through a motor and pressurizes the fuel in a fuel tank for conveying the pressurized fuel to an engine; a pressure control part which performs feedback control on voltage which is applied by the motor so that the fuel pressure approaches a target fuel pressure; the control device which transmits the target fuel pressure to the pressure control part; and a power supply device which supplies electric power to the motor, the pressure control part and the control device. After the switch of the power supply device is switched on (at a time point T0) and before the target fuel pressure (Pel) is received by the pressure control part from the control device (at a time point T1), the pressure control part utilizes a temporary target fuel pressure (Ps) for performing feedback control on the fuel pressure (P).

The present invention relates to the technical field of chemical industry production and in particular relates to a production technology of thionyl chloride. Sulfur and chlorine gas are reacted in a synthesis reactor to produce synthesis gas, the synthesis gas and sulfur dioxide gas enter together into a reactor, produced crude products of the thionyl chloride after the reaction in the reactor directly enter into a distillation column in a gas state, and gas phase from the top of the distillation column is condensed, the condensed gas enters into a reflux tank; and gas phase in the reflux tank enters into an evacuation tank via an ejector, the treated gas is recycled into the synthesis reactor, and qualified products are collected at the middle part of the distillation column. The production technology is simplified and the technologies of condensation, sulphur combining, light component recycling, etc. of the reacted crude products of the thionyl chloride are saved. Due to the reduction of the condensation and regasification, the technology is relatively short in routes and minimal in heat loss, and greatly reduces energy consumptions of the devices.

A refueling device (1) for refueling a fuel tank (2) of an internal combustion engine (3) in a motor vehicle (4) has a filler connector (5) for feeding fuel to the fuel tank (2). An integrated fuel feed device (10) feeds the fuel from the filler connector (5) to the fuel tank (2).

Contacting apparatus for contacting an energy storage cell (1) comprising at least one printed circuit board (5) which is provided for discharging the electrical energy stored in the energy storage cell (1), wherein at least one electric pole of the energy storage cell (1) is pressed by a releasable mechanical connection (7) with a specific contact pressing force against an electrically conductive layer (5c) of the at least one printed circuit board (5) which is located on a front side of the at least one printed circuit board (5) facing the energy storage cell (1).

The invention relates to a pressure shut-off valve for a high-pressure cleaner and a high-pressure cleaner with a pressure shut-off valve, in particular to a pressure shut-off valve for a high-pressure cleaner. According to the invention, the pressure shut-off valve (10) has an effective throttle gap (30) between the valve housing (11) and the valve body (16) with a total length (a) measured in the direction of the longitudinal axis (17) of the valve body (16), the effective throttle gap (30) being part of a flow connection (12) between the inlet (13) and the outlet (14). The valve body (16) has a maximum diameter (d) extending radially with respect to the longitudinal axis (17). In a first closed position (40) of the pressure shut-off valve (10), the total length (a) of the effective throttle gap (30) is at least 50% of the maximum diameter (d) of the valve body (16).