1725 results about "Work pressure" patented technology

A high-pressure wear resistant cylinder that utilizes a high-pressure field for strength is an economical method of, or device for, handling very high pressures and the pumping of abrasive and corrosive fluids. The economic considerations are so favorable, that the invention may be considered a replacement part. The invention is suitable for a variety of applications, particularly a reciprocating flow work exchanger in the well stimulation or hydraulic fracturing industry. Using a high pressure field to strengthen the external surface (outside) of a pipe that is precision honed and plated or sleeved internally (inside), it is now possible to construct various high pressure machines in a relatively inexpensive manner. This invention makes it possible to use pipe with internal operating pressures greater than their nominal operating pressure ratings permit. This invention will be used in various high pressure piping and machinery applications.

Thermal interfaces and methods include an array of carbon nanotubes aligned substantively perpendicularly from a substrate. One method includes arranging metal catalyst particles with a particular ligand on a fluid surface of a Langmuir-Blodgett trough. This forms uniformly spaced particles with spacing based on the particular ligand. The uniformly spaced metal catalyst particles are deposited on a substrate and carbon nanotubes are grown on the particles using chemical vapor deposition. A highly efficient thermal interface can be produced with a carbon nanotube packing ratio greater than fifty percent and used in a thermal switch or other device. In some methods, commercially available nanotubes are condensed on a substrate using carbon nanotubes with terminal carboxylic acids in solution and an amine monolayer on the substrate. Pretreatment of the nanotubes in a switch by applying heavy pressure between two surfaces results in good thermal conductivity between those surfaces at smaller operating pressures.

It is in vacuum state between glass heat pipe and glass outer tube as well as inside glass heat pipe. Fusing seals both of heat pipe and outer tube. Heat absorption coating is coated on external wall, and working medium is filled inside heat pipe. Quantity of working medium filled is 0.1-0.5%V, where V is cubage of heat pipe. Based on theory of applied thermodynamics, quantity of working medium is selected scientifically. When temp reaches a critical temperature, all working medium is turned to vapor phase. If temp rises continuously, the pressure is raised according to rule of vapor phase, reducing pressure inside the heat pipe under high temp so as to solve issue of cracking glass heat pipe caused by solarizing empty glass heat pipe. Adsorption material is added inside heat pipe in order to ensure restarting glass heat pipe rapidly.

An injector 20 that may be used to deliver radiographic contrast media and/or flushing solution into a patient's vascular system for the purposes such as obtaining enhanced diagnostic x-ray images. The injector includes the following features: (1) a syringe mount 26 for attachment of a syringe 28 to the injector 20; (2) display 34 and controls 90 for volume and flow rates; (3) automatic limiting of the operating pressure of the injector 20 as determined by the selection of a flow rate; (4) a syringe cradle 48 having a warming capability; (5) a purge/retract trigger 36 for control of the injection procedure having intuitive direction (i.e., forward for injecting, reverse for filing), non-contact control transmission through the housing of an injector 20 for an improved seal integrity, a speed lock, and/or the ability to change the concentration and/or flow rate of media or other fluid during an injection procedure; (6) a switch to determine when the drive ram 46 is in a “home” position; (7) a “soft” on/off power switch separate from the injector; and (8) a structure to prevent rotation of the drive ram 46 about its axis of symmetry 76. Additionally, the injector system includes software for the control of various components.

Plasma deposition apparatus (1) and method that allows metal or nonmetal vapor (6) to be generated by electron-beam evaporation, guides that vapor using a noble gas stream (containing reactive gases in cases of reactive evaporation), ionizes the dense directed gas and vapor stream at working pressures above about 0.0001 mbar using a hollow cathode plasma arc discharge (11), and conveys the ionized vapor and/or gas stream towards the substrate (4) for impact on the surface at energies varying from thermal levels (as low as about 0.05 eV) up to about 300 eV.

A system for use in monitoring, measuring, computing and displaying the rate of compression of aircraft landing gear struts, experienced while aircraft are executing either normal or hard landing events. Further by measuring the vertical compression rate of the landing gear strut, thus with aircraft hull angle correction to horizontal, determining the vertical sink-rate of the aircraft, as it comes into initial contact with the ground. Accelerometers are attached to opposing sides of a compressible landing gear strut, monitoring and measuring parallel data streams; then identifying differential acceleration data streams, which computed through mathematical algorithms measure the collapse rate of the landing gear strut. Pressure sensors are attached to the working pressure within the landing gear strut, so to monitor in-flight landing gear strut pre-charge pressure, until such time as the pre-charge pressure suddenly increases, to detect the aircraft has come into initial contact with the ground. A method of operating an aircraft at an increased maximum landing weight limitation.

The invention discloses a low-pressure ethanol recovery device and method with triple effect rectification. The low-pressure ethanol recovery device with triple effect rectification comprises a first rectifying tower, a second rectifying tower, a third rectifying tower, a rectifying tower reboiler, a rectifying tower feed preheater, a condenser, a return tank, a dilute ethanol feed preheater, a temporary finished product storage tank and a finished product cooler. In the ethanol recovery method with triple effect rectification, by controlling the recovery of the finished ethanol in the second rectifying tower, the content of ethanol in tower bottom wastewater of the second rectifying tower is 5wt%-30wt%, the temperature of the tower bottom wastewater is 100-120 DEG C, and the working pressure of the third rectifying tower is 250-400kPa. The invention adopts the low-pressure triple effect rectification technique and reduces energy loss in the technical process, thus greatly reducing the energy consumption; and the operating pressure and temperature of the third rectifying tower are greatly reduced, and the requirements on the high temperature resistant and corrosion resistant properties of equipment are reduced, thereby reducing the equipment investment and the maintenance cost.

A gas regulator includes an actuator, a regulator valve, and a secondary device. Downstream pressure feedback is provided to the actuator and the secondary device via a Pitot tube disposed within an outlet of the regulator valve. The Pitot tube has a first branch having an end connected to the actuator to place the actuator control cavity and diaphragm in fluid communication with downstream pressure within the outlet for maintaining the outlet pressure at an actuator setpoint pressure. The Pitot tube also has a second branch having an end connected to the secondary device to place the interior of the secondary device in fluid communication with downstream pressure within the outlet for responding to changes in the downstream pressure when the outlet pressure diverges from a predetermined normal operating pressure range.

The invention discloses an intelligent scenic region service robot. The intelligent scenic region service robot is characterized by comprising a central control unit, a wireless communication unit, an execution unit, a payment transaction unit, a solar control unit, a power supply unit, a positioning unit, a detection unit, a movement unit, a human-computer interaction unit, an image identification unit and a storage unit. Services provided for tourists include the photo service, scenic region introduction, scenic spot inquiry, map navigation, companion search, interactive competitions, mobile phone charging, self-service beverages, ticket purchasing in a scenic region and contact with staff in the scenic region. Work finished for the staff in the scenic region includes scenic region public security, scenic region cleaning and scenic region information offering. A solar generating unit is installed on the intelligent scenic region service robot, clean energy is utilized, and environmental protection and high efficiency are achieved. The intelligent scenic region service robot can provide the services in a completely intelligent mode, and provide close and thoughtful services for the tourists in the scenic region, working pressure of the staff in the scenic region is reduced, and quality of scenic region services is improved.

The invention discloses an energy-saving shield segment assembling and positioning electro-hydraulic control system adopting a load-sensitive technology. The system comprises a motor, a variable pump, a two-position three-way proportional reversing valve, a variable cylinder, an overflow valve, a pressure reducing valve, a pressure compensating valve, a one-way valve, a multi-way valve, a balancing valve, a hydraulic lock, a hydraulic motor, a hydraulic cylinder, a moment rotation speed sensor, a displacement sensor and a pressure sensor. The multi-way valve with the pressure compensating valve in a segment assembling system is used for controlling the rotation speed of the hydraulic motor for driving the segment assembling machine to rotate and the moving speed of each hydraulic cylinder. The pressure sensor is used for detecting the pressure of a main oil passage of the system and the working pressure of each executer in real time; and a computer control unit is used for determining a variable pump control signal according to a system pressure signal, so that the displacement of the variable pump is changed with the load change so as to achieve load sensitive control. According to the invention, energy waste caused by continuous oil supply at the highest working pressure of the traditional system is avoided, the throttling loss and overflow loss are greatly reduced, and an obvious energy saving effect is obtained.

The invention relates to a high-effective integral spray cooling system, which solves heat dissipation problem in field such as high power electron or laser system. The spray cooling system includes a spray cavity, a heat exchanger, a cooler, a circulating pump and a system working medium circulation pipeline, wherein the heat exchanger is a heat pipe heat exchanger; one end of the heat pipe of the heat pipe heat exchanger is a condensation end, and the other end is an evaporation end; the evaporation end is arranged in the spray cavity and is a steam condenser, and the condensation end is arranged in a water cooling shell-and-tube heat exchanger outside the spray cavity. The invention separates steam cooling and liquid cooling, which is beneficial to respectively increase heat transfer effect in condensation and cooling process; employs the heat pipe condenser to further increase heat transfer performance in condensation process and reduce heat exchange area of the condenser; and arranges the condenser in the spray cavity for making spray cooling structure more compact and reducing flow resistance of working medium steam, thereby reducing operating pressure of the spray cavity and being beneficial to increase general heat dispersion performance of spray cooling.

The invention discloses a method and device for service provision of an online customer service system and the online customer service system. The method comprises the steps that an instruction for using the online customer service system sent by a user is received; according to saved behavior trace tracking data as well as historical access data of the user, the user is classified, and services used by the user or a question proposed by the user are predicted; and a menu interface corresponding to a classification result is displayed on an online customer service interface, or an online customer service worker corresponding to the classification result is assigned. The method and device for the service provision as well as the online customer service system disclosed by the invention have the advantages that the type of the question to be proposed by the user are predicted through user classification and a menu related with the classification or the online customer service worker proficient in solving the type of questions is displayed, so that convenient and rapid help services can be provided to the user; use efficiency of the user can be increased; the user's service experience can be improved; and working pressure of the online customer service worker can be relieved.

The present invention relates to engineering material test instrument, and is especially one kind of low temperature high pressure three-axis creepage test instrument. The instrument includes system unit, refrigerating system, stable pressure hydraulic oil source system and data acquisition and processing system. The test tank of the system unit set on support has inside upper pressure rod, lower axial pressurizing piston with lower part communicated with the stable pressure hydraulic oil source system via the axial pressure loader, inside communicated with the stable pressure hydraulic oil source system via the peripheral pressure loader, and refrigerating compressing tube connected with refrigerating system. All the measuring sensors are connected separately with the data acquisition and processing system. The present invention may be used in completing single- and three-axis creepage and strength test at normal or low temperature.

A pilot operated pressure valve which limits the rate of start-up pressure rise ("soft start-up") and substantially eliminates excessive system pressure spikes. The valve includes an inlet, a hollow cylindrical main body sealingly connected at one end thereof to the inlet, a pilot chamber having a sleeve slidably mounted within the main body and an operating pressure adjustment connected to another end of the main body adjacent another end of the pilot chamber for varying the threshold operating pressure of the valve. A main chamber receives pressurized fluid metered through a main orifice and discharges pressurized fluid through a damping orifice when the main chamber is filled and fluid inlet pressure exceeds the inlet threshold pressure which is just sufficient to open a spring biased pilot ball downstream of the damping orifice. An exit port upstream of the main orifice will open for discharging pressurized fluid from the valve back to a supply tank when inlet pressure exceeds the maximum operating pressure setting of the valve. Pressurized fluid is also metered from the pilot chamber into a pressure compensated priority flow control valve arrangement including an adjust chamber to automatically vary the operating pressure of the valve in "soft start-up" fashion by selectively discharging pressurized fluid from the pilot chamber and/or the adjust chamber in modulated fashion when fluid pressure reaches the threshold operating pressure.

The invention relates to a broadcasting PGM (Probabilistic Graphical Model) master-slave output one-click emergency system and a broadcasting PGM master-slave output one-click emergency method. The system is of a structure that master and slave program signal links are respectively formed by master and slave broadcast control workstations, master and slave inverters, master and slave video servers, a plurality of video-audio distributors and master and slave switching equipment; and the master and slave program signal links are respectively connected with two input ends of a 2*1 switch arranged on a control panel at the output end of the master switching equipment. According to the invention, a control signal link and the program signal links are adopted; a last-level signal inversion control mode adopted by a conventional broadcasting system is changed; once the abnormal condition of a current link broadcast signal is monitored, the 2*1 switch can be directly inverted to a backup link by the universal control panel; the complex fault judgment process is saved; the working pressure of a broadcasting operator on duty in a television station is reduced; the fault judgment process is simplified; the timely observation and the rapid processing on a fault are implemented; and a broadcasting accident is effectively avoided.

An externally programmable shunt valve assembly that includes a magnetic rotor that is operable in response to an externally applied magnetic field and configured to increase or decrease the working pressure of the shunt valve assembly in finite increments.

A process transmitter for measuring a process pressure includes a pressure sensor in a sensor housing. An isolation diaphragm which isolates fill fluid from process fluid is spaced apart from a process fluid seal. The spacing reduces deformation of the isolation diaphragm due to a mounting force.

The invention discloses a variable step size disturbance maximum power point tracking method based on power forecasting. The control method combines a power forecasting method and a variable step size method, leads the voltage value of the theoretical maximum power point of a photovoltaic cell at the current time into a modulating pulse generation process to perform maximum power tracking of the photovoltaic cell through dual-functions of the two methods. By means of the control method, the problem of erroneous judgment and tracking failure when the external environment changes remarkably can be solved, the contradiction existing between the maximum power tracking speed and accuracy can be effectively solved, the maximum power point can be tracked fast, and the theoretical maximum power point voltage can be ensured when the actual working pressure changes along with the environment factors.

The invention discloses a device for measuring the friction behavior of materials under multi-atmosphere and vacuum environments, which comprises a base, a drive unit, a sample clamping mechanism, a pressure head control mechanism and a seal cover, wherein the seal cover is arranged on the base and seals the sample clamping mechanism and the pressure head control mechanism; the sample clamping mechanism comprises a sample stage, a sample gland and a vertical rotating shaft; a sample is clamped between the sample stage and the sample gland; the sample stage is connected with the base through the vertical rotating shaft; the drive unit is dynamically connected with the vertical rotating shaft, and drives the sample clamping mechanism to rotate along the axial line in the vertical direction; and the pressure head control mechanism controls the operating position and the operating pressure of a pressure head, and transmits acquired data to a computing system through a data acquisition device. The device for measuring the friction behavior of the materials under the vacuum environment can realize real-time data acquisition of parameters such as the friction coefficient and so on under a plurality of environments according to the experimental demands, has a simple structure, and is convenient to use.

A target adapted for a sputtering process for making a compound film layer of a thin film solar cell includes a composition having a formula of CuB_1-xC_xSe_yS_2-y, wherein B and C are independently selected from Group IIIA elements; x ranges from 0 to 1; and y ranges from 0 to 2. A thin film solar cell made by sputtering using the target and a method of making the thin film solar cell are also disclosed. Specifically, the thin film solar cell includes a compound film formed with substantially columnar grains. The energy gap of the compound film layer may be varied using different work pressures during a sputtering process. At least one interlayer may be included in the compound film layer to control the size of columnar grains in the compound film layer.

The invention relates to a hydraulic control system for a ship traction winch, a transmission device and a control method for ocean traction, lifting and load collection and release. The hydraulic control system comprises a hydraulic pump, a hydraulic motor, a speed reducer, a drum, a brake oil cylinder, a stopper oil cylinder, a control valve set, an auxiliary element and a pipeline. In a hydraulic winch system, an adjustable pressure overflow valve is embedded; the working pressure of the overflow valve can be set according to change of sea conditions; and the pressure acted on the hydraulic motor is limited, so that a cable is always located in a proper tensioning state, and the wave compensation capacity is achieved. The hydraulic control system can largely reduce the change of tension in the cable to adapt to different wave requirements, can be used for normal operation, can realize control of constant tension, guarantees stable and safe load collection and release operation, and can effectively improve the operation capacity of the whole winch under complex ocean environment.