3035 results about "Working pressure" patented technology

A radio frequency (RF) coaxial resonator feeding a saltshaker-like gas distributing electrode assembly forms a capacitively coupled plasma source. This apparatus can generate plasma of high density over a wide pressure range and large process window. The system may be used as a remote radical-rich plasma source for materials surface processing.

A Drill-To-The-Limit (DTTL) drilling method variant to Managed Pressure Drilling (MPD) applies constant surface backpressure, whether the mud is circulating (choke valve open) or not (choke valve closed). Because of the constant application of surface backpressure, the DTTL method can use lighter mud weight that still has the cutting carrying ability to keep the borehole clean. The DTTL method identifies the weakest component of the pressure containment system, such as the fracture pressure of the formation or the casing shoe leak off test (LOT). With a higher pressure rated RCD, such as 5,000 psi (34,474 kPa) dynamic or working pressure and 10,000 psi (68,948 kPa) static pressure, the limitation will generally be the fracture pressure of the formation or the LOT. In the DTTL method, since surface backpressure is constantly applied, the pore pressure limitation of the conventional drilling window can be disregarded in developing the fluid and drilling programs. Using the DTTL method a deeper wellbore can be drilled with larger resulting end tubulars, such as casings and production liners, than had been capable with conventional MPD applications.

An energy storage and recovery system includes a renewable power source, a hydrogen generation device in electrical communication with the renewable power source, a hydrogen storage device in fluid communication with the hydrogen generation device, a hydrogen fueled electricity generator in fluid communication with the hydrogen storage device, and a pressure regulator interposed between and in fluid communication with the hydrogen fueled electricity generator and the hydrogen storage device. The pressure regulator is set at an operating pressure of the hydrogen fueled electricity generator.

The invention discloses a long-service-life split type valve seat. The long-service-life split type valve seat comprises linings and bases. The linings are embedded into the outlet ends of the bases.The linings are matched with a valve body for use. Each lining is a tungsten carbide alloy. The long-service-life split type valve seat has the beneficial effects that the valve seat is composed of the linings and the bases, the linings are made of a hard alloy material, the hardness, the strength, the wear resistance and the corrosion resistance of the linings are improved, and the service life of the valve seat is greatly prolonged; the valve seat is of a split structure, once abrasion occurs, only the linings or the bases need to be replaced, integral replacement is not needed, maintenanceis convenient, the time and labor are saved, and meanwhile the production cost of an oil and gas field is reduced; the appropriate diameter sizes of the linings can be selected according to the working pressure, the conveying medium, the degree of abrasion of the valve body to the valve seat and the like in actual working conditions, and the application range is wide; the linings and the bases arein various shapes and can be combined according to actual working condition requirements, and the applicability is high.

Tourniquet assemblies are provided including a pressure applicator adapted to be secured around a limb and a tensioning mechanism for applying a working tension to the pressure applicator. The tensioning mechanism may include a platform, a clip and a tensioning member. The tensioning mechanism may be configured to apply the working tension via rotation of the tensioning member, and the clip may be configured to receive, and at least temporarily inhibit rotation of, the tensioning member. A tension indicator may also be provided including a base configured to attach to a tourniquet strap, a platform configured to move relative to the base when subjected to a tourniquet working pressure, and one or more tactile or visual indicators configured to provide a variable tactile or visual indicator based on the tourniquet working pressure.

The invention relates to the using of low temperature heat for the production of electrical energy by using of supercritical carbon dioxide as working fluid.

It included a process and a device for process realizing with higher efficiency in relation to other known processes and with a wide temperature working range. This is related to a wider adjustability which allows an optimal operation both in summer and in winter operation without technical or constructional changes. The process is realizable without damages to the environment and is realizable with low effort. The relative emission of carbon dioxide is reduced in relation to other processes.

Low temperature heat from a given heat source (1) is taken off by carbon dioxide at high supercritical pressure as heat transfer and working fluid in the process. Then the heated fluid is expanding in an expansion machine (2), which is connected with a generator (3) for the production of electric power. In this process the fluid will be cooled, then liquefied by using of a cold source (4) and in liquid state compressed to the working pressure.

A method and apparatus to maximize spark plug life in pre-chamber spark plugs operating with ultra-lean mixtures and/or elevated engine BMEP is presented. Electrode erosion is reduced by spreading discharge energy over a wider surface area, maintaining fuel concentration in the spark gap, controlling gas static pressure during discharge, and maintaining safe electrode temperature. Energy is spread via a swirling effect created by periphery holes in an end cap, resulting in a lower specific energy discharge at the electrodes. Divergently configured electrodes reduce the spark voltage at high operating pressures and the energy required for ignition. The flow field generated at the electrodes prevents electrical shorts due to water condensation and avoids misfire. The center electrode insulation provides an effective heat transfer path to prevent electrode overheating and pre-ignition. The volume behind the electrodes provides a volume for burnt products from previous combustion cycles and leads to more reliable ignition.

The invention discloses a pressure regulating device which comprises a compass assembly and a rotating disc matched with a regulating screw of a pressure switch. The bottom of the rotating disc is provided with a screw rod penetrating through a dial plate of the compass assembly. The rotating disc is provided with a rotating disc pointer matched with a pointer of the compass assembly. The rotating disc, the screw rod and the compass pointer are in coaxial linkage. A plurality of pressure regulating scale marks are evenly distributed in the circumferential direction of the rotating disc. In the assembling and using process, the pointer of the rotating disc is aligned with the pointer of the compass assembly, then, a worker controls the rotating disc through the regulating screw to rotate and drives the screw rod and the pointer of the rotating disc to rotate coaxially, the current pressure regulating value can be visually determined through the pressure regulating scale marks, the working pressure limiting value of an electric pressure cooker is precisely controlled to meet the corresponding requirement for products, and then the pressure regulating operation of the electric pressure cooker is precisely and efficiently completed. The invention further discloses the electric pressure cooker applying the pressure regulating device.

The invention discloses a tumor malignant risk stratification auxiliary diagnosis system of an artificial intelligence medical image. The system comprises a data acquisition module, a data preprocessing module, a model establishment module, a model verification and optimization module, a stratification diagnosis module and a database platform. The tumor malignant risk stratification auxiliary diagnosis system of the invention is based on artificial intelligence technology, successive stratification of the malignant risk of the tumor can be achieved, the clinical diagnosis thinking is simulated, based on the high-precision ability of detecting benign lesions and malignant tumors of artificial intelligence model, and the space-occupying lesions with definite imaging features are diagnosed automatically. As a result, the system can substantially assist the clinical management decision of space-occupying lesions, improve the existing work flow of clinical diagnosis, increase the confidenceof doctors in diagnosis, reduce the work pressure, reduce the anxiety of patients with low-risk malignant lesions, greatly improve the diagnostic rate of benign lesions and malignant tumors, and hopefully realize the landing implementation of artificial intelligence clinical auxiliary diagnosis.

An inerting system provides air with reduced oxygen content by flowing and directing air through an air separation module. Optimal working pressure for the air separation module is obtained with two compressors. A first compressor elevates air from the aircraft cabin to a second pressure. The second pressure is at an intermediate level below the working pressure of the air separation module. A second compressor elevates air from the second pressure to the working pressure. The second compressor is driven by air that is exhausted through a turbine. The pressure difference between air at the working pressure and air required by the fuel distribution system is used to power the turbine and drive the second compressor.

The invention provides an intelligent pressure cooker and a using method thereof, and relates to the technical field of electric appliances in life. When a main loop is connected, a heating unit heatsa pressure cooker cavity; during heating, a collecting component collects cooking parameters in the cavity in real time, and the cooking parameters are sent to a control center; the control center stores cooking modes of the intelligent pressure cooker in advance and cooking threshold values corresponding to the cooking modes, wherein the cooking modes comprise the constant-pressure control mode,the temperature-constant control mode and the normal mode; under different cooking modes, the control center controls a pressure decrease control unit or the heating unit according to the received cooking parameters, temperature-constant pressure-constant control adjustment is realized for the pressure cooker, pressure and temperature in a cooker body are monitored easily in real time in the process of cooking, it is avoided that a common pressure cooker is monotonous and random in working pressure and temperature, accordingly, food heating speed is increased, food heating quality is improved, and using experience of a user is improved.

A non-aqueous electrolyte secondary battery has a pressure-sensitive elastic element reliably operating at a desired operating pressure. The battery includes an outer can having an opening; an electrode assembly which is housed in the outer can and comprises a positive electrode having a positive electrode current collector and a negative electrode having a negative electrode current collector; a sealing plate sealing the opening; an external electrode terminal whose one end is engaged with the throughhole of the sealing plate and whose other end projects outside the sealing plate; and a pressure-sensitive elastic element which is disposed inside the sealing plate in the battery and deforms in accordance with an increase in the gas pressure in the battery, the external electrode terminal. The external electrode terminal includes therein a hole connecting the outside of the battery and the space in contact with the outer side of pressure-sensitive elastic element.

The invention discloses a multi-split air conditioner system. When the temperature of an indoor environment reaches the preset temperature, the multi-split air conditioner system is controlled through a controller of the multi-split air conditioner system to run in a standby-ready mode, a refrigerant circulates between a compressor and an air and liquid separator, the capacity output of the compressor is controlled, and the pressure of a refrigerant outlet of the compressor is maintained within certain range, so when the multi-split air conditioner system is restarted to generate heat, the phenomenon of raising the lower pressure of the refrigerant to the working pressure is avoided, the cold air prevention time of an indoor unit is shortened, and the better user experience can be obtained. In addition, by setting the time of the multi-split air conditioner system entering the standby-ready mode through the controller, when the time of entering the standby-ready mode reaches the preset value, the multi-split air conditioner system is controlled to enter the standby mode, and the compressor is closed, so as to save the electric energy. The invention also provides a quick-starting heat generation method suitable for the multi-split air conditioner system.

The invention provides a 2D (2-dimensional) hydraulic-power-assisted electro-hydraulic proportional reversing valve, which comprises a valve body, a valve core, a valve sleeve, a linear electro-mechanical converter and a compressive-torsional coupling, wherein the valve core, the compressive-torsional coupling and the linear electro-mechanical converter are coaxially connected; an output shaft of the linear electro-mechanical converter is fixedly connected with an input end of the compressive-torsional coupling; an output end of the compressive-torsional coupling is fixedly connected with the right end of the valve core; a sensitive cavity is formed by the left end of the valve core, the valve sleeve and a left cover plate; a pair of axisymmetric high pressure holes and a pair of axisymmetric low pressure holes are respectively formed on the surfaces of shoulders of the valve core in the sensitive cavity; a pair of axisymmetric sensing channels are arranged on the inner surface of the valve sleeve outside the sensitive cavity; and one end of each receptive channel is communicated with the sensitive cavity, and the other ends of the receptive channels cover areas between adjacent high pressure holes and low pressure holes. The 2D hydraulic-power-assisted electro-hydraulic proportional reversing valve not only has the characteristics of high flow rate, high working pressure, and the like of an ordinary pilot-control type electro-hydraulic proportional valve, but also fulfils a proportional control function like a direct-actuated proportional valve under the circumstance of zero pressure (pressure loss).

The invention discloses a charger with overvoltage and overcurrent protection and a protection method thereof. The charger with the overvoltage and overcurrent protection comprises a first interface (100), a second interface (300), a voltage stabilizing unit (400), a control unit (600), an input voltage sampling unit (500), a switch unit (200) and a current sampling unit (700); the voltage stabilizing unit (400) is used for receiving input voltage of an external power source and providing constant working pressure for the control unit (600); the control unit (600) is used for controlling turn-off or turn-on of the switch unit (200) according to whether input voltage detected by the input voltage sampling unit (500) is excessive or not or real-time charging current detected by the current sampling unit (700) is excessive or not; accordingly a protection action of the circuit is achieved. According to the charger with the overvoltage and overcurrent protection, when the charger is in overvoltage or overcurrent, the voltage stabilizing unit provides the constant working voltage for the control unit, normal work of the control unit is guaranteed, and then a power supply and a battery pole are protected from being burnt or losing efficacy by stopping charging the battery pole through the control unit.

Provided is an apparatus and a process for preparing graphene by the technology of cavitating jet. The apparatus comprises a storage tank, a water inlet pipe, a valve, a motor, a plunger pump, a compression gauge, a high pressure pipe, a cavitation generator, a cycle water cooling means and a return line. The outlet of the storage tank is connected with the inlet side of the water inlet pipe, andthe outlet side of the water inlet pipe is connected with the water inlet of the plunger pump; the valve is installed on the water inlet pipe, the plunger pump is driven by the motor, and the operating pressure of the plunger pump is displayed on the compression gauge; the water outlet of the plunger pump is connected with the water inlet of the high pressure pipe, and the water outlet of the high pressure pipe is connected with the water inlet of the cavitation generator; the water outlet of the cavitation generator is connected with the water inlet of the return line, the water outlet of the return line is connected with the inlet of the storage tank, and the cycle water cooling means is installed on the return line. The preparation method comprises seven steps. The conception of the invention is scientific; the process is advanced; production cost is low; no environmental pollution is generated; industrial large scale production can be realized; the apparatus and process provided in the invention have a wide application prospect in the technical field of preparing graphene.

A heat exchanger uses a refrigerant acting under a high pressure, such as carbon dioxide, as a refrigerant. The heat exchanger includes first (10) and second (20) header pipes arranged a predetermined distance from each other and parallel to each other, each having at least two chambers (12,14,22,24) independently sectioned by a partition wall, a plurality of tubes (50) for separately connecting the chambers of the first (10) and second (20) header pipes, facing each other, wherein the tubes (50) are divided into at least two tube groups (51,52), each having a single refrigerant path, a refrigerant inlet pipe (30) formed at the chamber disposed at one end portion of the first header pipe (10), through which the refrigerant is supplied, a plurality of return holes (29) formed in the partition wall to connect two chambers adjacent to each other, through which the refrigerant sequentially flows the tube groups (51,52), and a refrigerant outlet pipe (40) formed at the chamber of one of the first and second header pipes connected to a final tube group of the tube groups along the flow of the refrigerant, through which the refrigerant is exhausted.

A check valve includes a body defining a passageway through which fuel flows in a first fuel-flow direction during pump operation. The check valve also includes a seat, a seal member, and a biasing member biasing the seal member toward the seat. The seal member is movable between a first seated position in which the seal member is engaged with the seat and the pressure in the fuel rail is substantially equal to the operating pressure, and a second seated position in which the seal member is engaged with the seat and a residual pressure in the fuel rail is substantially less than the operating pressure. The seal member and the seat define a leak path between the fuel pump and the fuel rail permitting fuel to flow in a second fuel-flow direction opposite the first fuel-flow direction when the seal member is in the second seated position.

The invention discloses an ultrasonic-assisted tea oil extraction method using subcritical CO2, comprising the steps as follows: (1) taking dry tea seed, hulling, crushing, and placing in an extraction kettle; (2) injecting the subcritical CO2 into the extraction kettle to mix with the tea seed; (3) extracting the raw material for 0.5-5 hours; (4) decompressing and evaporating so as to completelygasify the subcritical CO2 liquid, wherein the temperature in evaporation process is controlled at 30-70 DEG C, and finally discharging the extracted tea oil from the bottom of a separation kettle. The method has the advantages that (1), the advantages of the subcritical CO2 extraction technology and the ultrasonic extraction technology are sufficiently utilized to shorten the extraction time andimprove the extraction yield; (2), the work pressure is low, and the natural activity of heat-sensitive material cannot be influenced since the extraction temperature is less than 30 DEG C, and the nutritional value and quality of the tea oil are improved; (3), the device cost is low, the refining process is less, the tea oil loss is less and the product oil yield is high; (4) a natural green food is obtained since the CO2 solve is residue-free.

The invention relates to an exhaust brake with stable and adjustable operating pressure, stable brake and sensitive brake reaction, comprising a valve body, a disc, a supporting rod, a supporting sleeve, a control rod, a spring and an adjustable bolt without a pressure relief vent, wherein, the supporting rod and the supporting sleeve are used for fixing the disc, the control rod is used for controlling the on and off of an exhaust channel, the spring is used for adjusting the size of the operating back pressure of an assembly. The exhaust brake can release the excess pressure in time when the pressure surpasses the presetting value due to any unforeseen circumstances and guarantees the stable and reliable operating pressure; moreover, the exhaust brake with the decompressor has adjustable operating pressure, simple and convenient implementation and reliable performance.

The method of providing a desired motive force for one or more rams of a subsea blowout preventer as a function of a desired pressure differential across one or more pistons on the subsea blowout preventer when the desired pressure differential is higher than the gauge pressure of the accumulators supplying the pressure, comprising providing one or more pistons connected to the one or more rams, the pistons having a distal side and a proximate side with respect to the rams, providing a first pressure from the accumulators to the distal side of the pistons, providing a tank to contain a second pressure less than the ambient pressure of seawater at the location of the subsea blowout preventer, providing a pressure reducing valve which exhausts into the tank and reduces the pressure on the proximate side of the one or more pistons to proximately the difference between the desired pressure differential and the first pressure further comprising that the pressure differential across the one or more pistons is proximately equal to the maximum working pressure of the one or more cylinders plus an amount to provide a force towards the bore of the blowout preventer stack to offset the force of the pressure in the bore acting on the exposed end of rods of the one or more piston.