3334results about How to "Stable pressure" patented technology

A processing apparatus includes a process container having a placing table for placing a processing object, an exhaust system having vacuum pumps and a pressure control valve for exhausting atmosphere in the process container. A gas injection unit having a gas ejection hole is provided in the process container, as well as a gas supplying unit for supplying a process gas to the gas injection unit. The entire process apparatus is controlled by a controlling unit. The control unit controls the exhaust system and the gas supplying unit. When starting a predetermined process, the process gas at a flow rate greater than a prescribed flow rate is supplied for a short time while exhausting the atmosphere in the process container by the exhaust system, and then the process gas at a prescribed flow rate is supplied.

A layer of fluoropolymer fine fiber can be made. The fine fiber can be made by electrospinning from a solvent or a solvent blend. The layers of the invention are useful in general filtration of fluid streams including gaseous and liquid streams. The fine fiber layers are also useful as hydrophobic filtration layers that can be used to separate water from a hydrocarbon stream.

The invention discloses a starting pup joint with a second-time starting function. The starting pup joint comprises a core shaft and a setting ball. The core shaft is connected with a sliding sleeve,the setting ball is connected with the core shaft, the sliding sleeve is connected with an outer sleeve, the outer sleeve is connected with the core shaft through a first-stage shear pin, a groove isformed in the core shaft, a baffle ring can be embedded into the groove, the baffle ring is in contact with the outer sleeve, the sliding sleeve is connected with an upper joint, the upper joint is connected with a lower joint, the upper joint, the sliding sleeve and the core shaft are sequentially connected in a step mode, the core shaft is provided with a fluid channel and a fracturing channel,and the sliding sleeve is provided with a fluid channel and a fracturing channel. Setting of a packer can be achieved when the packer is opened for the first time, and when the differential pressure sliding sleeve cannot be opened normally, the starting pup joint is started for the second time, and the fracturing channel is opened.

The back pressure adjustment apparatus for a liquid ejection head has: a container having a liquid accommodating chamber which is connected to the liquid ejection head and accommodates liquid to be supplied to the liquid ejection head, and a gas accommodating chamber which accommodates gas; a movable film which separates the liquid accommodating chamber and the gas accommodating chamber, and forms a portion of whole walls of the liquid accommodating chamber; and a pressure adjustment device which causes all or a portion of the movable film to deform so as to adjust pressure of the liquid accommodated in the liquid accommodating chamber.

Described herein are methods, systems, and articles that are useful for controlling a fluid blending system, such as a fluid utility system. The methods, systems, and articles of this invention allow for the control of both a quantity metric (e.g., pressure) of the blended fluid the fluid blending system as well as at least one quality metric of a blended fluid in a fluid blending system. For example, the methods, systems, and articles of this invention provide for the simultaneous control of both the pressure and quality of fuel gas within a fuel gas header system.

A pipe network node flow measuring and dispatching method based on pressure monitoring comprises the steps that node pressure of a predetermined node in a pipe network is measured actually, and according to the measured node pressure, based on the discrete point spatial interpolation computing method, node water heads of all nodes are worked out; the pipe section flow of a predetermined pipe section is measured actually, coefficients of friction resistance of all flow measuring pipe sections are determined according to the actually measured pipe section flow and the worked-out node water heads, pipelines are grouped through the spatial clustering algorithm according to the coefficients of friction resistance of the pipe sections, and coefficients of friction resistance of all pipe sections are determined; according to the worked-out node water heads, the coefficients of friction resistance of the pipe sections, pipe lengths and pipe diameters, the pipe section flows of all the pipe sections are worked out; according to the material equilibrium principle, the node flows of all the nodes are worked out, and therefore pipe network model updating and checking, pipe network dispatching, leakage quantity analysis, leaking point positioning and other pipeline maintenance and operation management are conducted conveniently. By applying the method, energy consumption and loss due to leakage can be reduced substantially, and the pipeline management level is improved.

A breathing gas humidifier system for a patient includes a replaceable, closed water reservoir (1) with stable pressure, provided for receiving a water reserve for the breathing gas humidifier system. An intermediate storage unit (4) with water is closed from the environment and is located under the water reservoir. The water reservoir (1) and the intermediate storage unit (4) have a valve (16, 14) each, with one of the valves cooperating with the other valve, so that there is a flow connection between the water reservoir (1) and the intermediate storage unit (4) only when the water reservoir (1) is received in a connector (2) of the intermediate storage unit (4). The intermediate storage unit (4) is connected via a water connection line (5) located below the water level to a heated evaporator chamber (7), which opens above the water evaporating at the boiling point into the breathing gas line to a patient. A gas pressure equalizing line (12) is located between the heated evaporator chamber (7) and the intermediate storage unit (4).

The invention discloses an SCP urea injection system for the post treatment of diesel engine emissions, which belongs to internal combustion engine waste gas purification systems, comprises a urea solution box, a conveying pump, a filter, a urea nozzle, a pressure sensor and a temperature sensor, and is characterized in that the urea injection system comprises an energy accumulator, a large-capacity injection accommodating cavity and a device for heating urea solution by diesel exhaust, wherein the energy accumulator is connected with a main pipeline of the system in parallel and is used for stabilizing the pressure of the main pipeline; the large-capacity injection accommodating cavity is directly connected with the urea nozzle; and the device for heating the urea solution by the diesel exhaust comprises a waste gas inlet pipe, a temperature control valve, a waste gas outlet pipe and the like, wherein the urea nozzle adopts a pintle type nozzle which can prevent the urea from being crystallized at a low temperature to block an injection orifice. The system can realize precise and reliable injection metering of the urea solution.

A railway full-automatic bearing press comprises a base, a left side frame, a right side frame, a pull rod, a left-right main pressed combination oil cylinder, a bearing bracket, a hydraulic and electric control system; the left side frame and the right side frame are connected with two sides of the base; the top parts of the left side frame and the right side frame are connected by the round pullrod so that the whole set of device form a closed frame force-bearing structure; the left-right main pressed combination oil cylinder is symmetrically equipped to both ends of the base; the middle part of the base is equipped with a wheel-pair intelligent whole supporting, locking and thrusting wheel system which is provided with an upper platform; the lower part of the platform is equipped withan intelligent supporting lifting mechanism; the locking devices are respectively symmetrically equipped to the inner side of the guide rail above the upper platform; the thrusting wheel and the oil cylinder device are respectively symmetrically equipped into the openings above the left guide rail and the right guide rail; lifting guiding mechanisms which are composed of the guiding blocks fixed to the base are equipped to the right side and the right side of the upper platform; laser sensors are equipped to the left main oil cylinder base and the right main oil cylinder base; and the measuring device is equipped to the base. According to the invention, all railway wheel-pair bearings can be pressed without oil-cylinder supporting wheel pair and the operation is simple and reliable.

The invention relates to a nitrogen closed cycle drying and solvent recovery system comprising a dryer, a condensing device, a solid-gas separator, a circulating fan, a nitrogen heater, a solvent recovery tank and a nitrogen supply pipe, wherein the dryer is a fluidized bed dryer; an exhaust outlet of the fluidized bed dryer is connected with an air inlet of the condensing device through a pipeline; an air outlet of the condensing device is connected with the solid-gas separator; an air outlet of the solid-gas separator is connected with the circulating fan; air output by the circulating fan is delivered to the nitrogen heater for heating, and heated nitrogen is delivered to the dryer; a solvent collection opening of the condensing device is connected with the solvent recovery tank; cooling mediums of the condensing device and the solvent recovery tank are provided by cooling liquid supply pipes; and a feed port of the fluidized bed dryer is provided with a material seal type screw feeder. The invention realizes the production of a fluidized drying industry with continuous feeding and discharging and the recovery of an organic solvent without waste gas and water discharge and is beneficial to environmental protection.

The invention relates to an airbag comprising an inflatable cushion (11) with the gas produced by a generator when a collisions occurs having a vent hole (13) made in the inflatable cushion (11) which is provided with a device (21) including a part (23) made of flexible material with at least one hole (25) fixed to the inside of the inflatable cushion (11) and incorporating means for allowing the separation thereof from the cushion (11) when the internal pressure in the cushion is lower than a predetermined limit (Pt) preventing it from closing the vent hole (13) and stop doing so when the internal pressure in the cushion (11) exceeds said predetermined limit (Pt) such that it completely or partially closes the vent hole (13) when it adheres to the cushion (11) due to the effect of the pressure.

A movable laboratory with high biological safety is composed of primary experiment cabin, person cleaning and technological supporting cabin including clothes exchanging room, buffering room and substance transfer window between them, air-tight flexible connection channel between said both cabins, and the connected water and air pipelines, cables and signal lines.

A pressure sensitive stylus including a writing tip that is movable in response to contact pressure applied on the writing tip, an extremity that is movable together with the writing tip, an elastomer element positioned between a surface of the extremity and a surface formed from a housing of the stylus and a displacement detector for detecting the displacement of the writing tip. At least one of the extremity, the surface formed from the housing, and the elastomer includes a surface with base portion and at least one protrusion extending out from the base portion. When operating the stylus, at least one protrusion contacts a facing surface over a first range of contact pressures and both the at least one protrusion and the base portion contacts the facing surface for pressures exceeding the first range of pressures.

The invention discloses an underground layered gas-liquid two phase fluid pressure and temperature-retaining sampling device, which is arranged on the inner wall of a drilled hole or a sleeve and consists of a packer system, a liquid sample inlet system, a gas sample inlet system, an automatic multi-way valve, a sampling system, a temperature control system, and an external pressure / flow control system, wherein a thermal-insulation layer or temperature control system covers the outside of the entire sampling device. The device accurately controls the layer under ground fluid sampling positionto realize gas and liquid fluid sampling at different layer positions of a stratum, ensures the temperature and pressure in a sampling process are consistent with those of the underground fluid, and improves the pressure and temperature-retaining degree of the fluid in the sampling process. The principle of the device is simple, the parts are assembled simply and the device is suitable for multilayer sampling in a drilled well and underground gas-liquid two-phase fluid sampling.

Methods of and apparatus for preparing gas-filled microspheres are described. Gas-filled microspheres prepared by these methods are particularly useful, for example, in ultrasonic imaging applications and in therapeutic drug delivery systems.

This invention is a heat pump runner type heat transferring system of sewage or surface water source. It relates to a heat transferring system. This invention resolves the question of complex technological flow, difficult clean and maintenance, high initial cost, large floor space and poor running effect. The heat transferring medium export of this system is communicated to the entry of pressure relieving devices. The export of the pressure reliving device is communicated to the entry of the heat transferring medium pump. The export of the heat transferring medium pump is communicated to the entry of the heat pump unit. The export of the heat pump unit is communicated to the heat transferring medium entry of runner type heat transferring device. The sewage directly enters into the runner type heat transferring device for initial heat transfer. The sewage or surface water source entry terminal does not need to arrange filtering net or blocking device. Its blocking will not happen.

The present invention has incorporated a re-boosting pump to re-boost and to supply additional pressure energy input to a system periodically. The re-boosting pump gets its energy from a starting / re-boosting generator. This works to keep the level of the energy output sustainable.Another feature of the present invention is that it has incorporated a convergence recoil nozzle that utilizes a recoil force of the water jet. This recoil force which is equal in magnitude and opposite in direction, will push a piston that is inside a pressure chamber. This force is capable of doing different kinds of works, such as a pressurized liquid to add energy input to the system through a pressure pipe into the main penstock or it can be used as a pressure energy for the desalination of saline water.

The invention relates to a narrow amplitude satellite type flexographic plate printing machine which is characterized in that linear guide rails are adopted for ink transfer motion of an anilox roller and movement of a printing plate roller drum, the operation is lightweight and the printing precision is high; by setting an operation mechanism which can read data of a dial indicator for indicating the position of the printing plate roller drum, the technical difficulty in operation is reduced; the anilox roller is connected with a motor through a clutch, thereby avoiding the frequent cleaning problem in a workshop of the anilox roller; by using a back bucket type double-doctor ink supply device, the structure of an ink supply mechanism is greatly simplified, and the cost is greatly reduced; a central stamping roller drum is equipped with a water circulation cooling constant temperature system, thereby ensuring the printing quality; an ultraviolet drying device is provided with a power conversion energy-saving control circuit, thereby saving electrical energy; and an infrared drying device, a printing film covering device and a printing synchronous circular die-cutting device are arranged on the back side of the ultraviolet drying device after the last color of a printing group, thereby further saving the electrical energy, realizing synchronous multiple functions in one machine and reducing the cost. The narrow amplitude satellite type flexographic plate printing machine is applicable to water-based ink printing, and can avoid polluting commodities and causing harm to health of people, and is environment-friendly.

The invention discloses an uninterrupted circulating pup joint for petroleum well drilling and a continuous slurry circulation method, and the uninterrupted circulating pup joint comprises a pup joint body, an automatic central gate valve and a lateral normally-closed check valve, wherein the automatic central gate valve and the pup joint body are coaxially arranged; and the lateral normally-closed check valve is arranged on the side wall of the pup joint body below the automatic central gate valve. As the pup joint body structure with the combination of the large-drift diameter unobstructed automatic central gate valve and the triple lateral normally-closed single-flow valve is adopted, when a drill rod needs to be disassembled and assembled for making up, breaking out and pipe tripping, uninterrupted circulation of slurry is changed to be performed by the lateral normally-closed check valve, and pressure of the circulating slurry is utilized for automatically closing the automatic central gate valve above the lateral normally-closed check valve, thereby continuously maintaining the stability of the pressure of a borehole, effectively controlling the ECD (equivalent circulating density) value of annular space of the borehole, maintaining the stability of a well wall and the good effect of cleaning the borehole, preventing collapse and formation of a cuttings bed in the oblique well section and avoiding the collapse, clamping, leakage, blowout and other various complex situations.

The invention provides a molten salt tube-shell type steam generating device and a molten salt tube-shell type steam generating method. The device comprises a tube-shell type heat exchanger, a steam separation output component and a heating and heat preservation component, wherein the steam separation output component is arranged on the top of the tube-shell type heat exchanger, and the heating and heat preservation component is arranged on the outer side of the container wall of the tube-shell type heat exchanger; the tube-shell type heat exchanger is provided with a top tube box, a tube body and a bottom tube box in sequence from top to bottom, wherein the inside of the tube body is provided with tube bundles of which both ends are fixedly connected with the tube body by tube plates, and the gaps between the tube bundles are filled with molten salt; and the outer side of the tube body is provided with a molten salt inlet tube and a molten salt outlet tube, and the bottom tube box is provided with a water inlet tube and a water outlet tube. The method comprises the following steps of: pre-heating the tube body; and orderly performing molten salt filling, hot water filling, and steam separating and outputting. The device has the advantages of big effective heat storage capacity, long-term stable operation, and relatively low manufacturing cost and maintenance cost, and can meet the requirements on large-scale solar mid- and high-temperature heat utilization in industry.

The invention discloses a control method for drilling and pile formation, which is used for a CFG construction method. The control method comprises a drilling process and a drill lifting and pouring process, wherein the drilling process comprises the following steps of acquiring a current drilling depth of a drill rod in real time; judging whether the current drilling depth of the drill rod is more than or equal to a preset drilling depth and sending out a drilling-stopping control signal if yes so as to control a drilling machine actuator to stop working; and the drill lifting and pouring process comprises the following steps of acquiring the main hoisting tension of a drilling machine in real time; acquiring the pressure of slurry on the bottom of the drill rod according to the main hoisting tension; comparing the pressure of the slurry on the bottom of the drill rod with the target pressure of the slurry on the bottom of the drill rod so as to acquire the pressure deviation of the slurry on the bottom of the drill rod; and taking the pressure deviation of the slurry on the bottom of the drill rod as a control object so as to control the drilling machine actuator to lift the drill rod at corresponding speed. By efficiently controlling the drilling and back lift of the drill rod, the method can reduce the number of constructors, lower labor intensity as well as construction cost and improve construction efficiency and pile formation quality. The invention simultaneously discloses a control system for drilling and pile formation, as well as a drilling machine using the control system.

The invention provides a novel gas flow standard device and an application method thereof. The gas flow standard device mainly comprises a standard flow meter set, a test stand for a to-be-tested flow meter, a signal acquisition and control system, a gas circulation power system and a high-pressure gas source, wherein the standard flow meter set, the to-be-tested flow meter and the gas circulation power system are communicated in sequence through a pipeline to construct an enclosed loop; the signal acquisition and control system is provided with a temperature measuring unit and a pressure measuring unit respectively at pipeline sections where the standard flow meter set and the to-be-tested flow meter are positioned, and is used for controlling each flow regulating valve in a high-pressure fan, a heat exchanger and the enclosed loop. The gas flow standard device has the advantages of small floor area, stable and adjustable gas detection pressure, low running noise and low running energy consumption.

The invention discloses a contact force real-time control system for airbag polishing. The contact force real-time control system comprises an airbag polishing device, an air source, an air pressure adjusting device and a control system for adjusting the air pressure of an airbag in real time; the airbag polishing device comprises the airbag for polishing and an air chamber communicated with the air source; the airbag is fixed on a retainer which is linked with a motor through a spindle; the spindle is provided with an air channel communicated with the airbag and the air chamber; the air chamber is provided with a pressure sensor for detecting actual air pressure in the air chamber; and the pressure sensor is connected with the control system. The contact force real-time control system adjusts the air pressure in the airbag in real time through the control system, controls the contact force in the polishing process in real time, makes the contact force between the airbag and a workpiece to be polished constant, and is favorable for improving polishing effect and polishing precision.

The invention belongs to the field of oil and gas safety engineering and particularly relates to a device and a method for detecting the combustible gas leakage. The method belongs to a new method for realizing the fuel gas on-line detection and positioning in China, has the advantage of intermittent controllability and can also be used in process systems for gas taking detection and analysis on other gas. Through the arrangement of a first electromagnetic vacuum valve, a second electromagnetic vacuum valve, an automatic control proportion valve, a combustible gas detector and a gas pressure sensor, the goals of stable pressure in a continuous or intermittent control container and the combustible gas leakage detection are effectively realized. The device and the method have the advantages that the operation is convenient, the structure is simple, and the problems in two aspects including the on-line detection of the combustible gas and the stable pressure in a negative pressure container are mainly solved, and simultaneously, an automation control interface is also reserved for providing the possibility for the system full automation realization.

The invention relates to a selective catalytic reduction urea air premixing jet system, which belongs to the technical field of diesel engines. The selective catalytic reduction urea air premixing jet system comprises a controller, a metering pump, a urea solution tank, a urea solution pressure-stabilizing cavity, a reflux valve, a jet electromagnetic valve, an air atomizing nozzle, an air electromagnetic valve, an air pressure-stabilizing cavity, an air pressure-reducing valve, a compressed air tank, a cooling liquid electromagnetic valve, an integrated heat exchange device, a pipeline heat exchange device and a urea solution tank heat exchange device. The selective catalytic reduction urea air premixing jet system has the characteristics of low energy consumption, high accuracy and stability, simple structure, low system development cost and manufacturing cost and capacity of effectively reducing fuel oil consumption and NOx emission of the diesel engines.

The invention discloses a gob-side entry retaining method for an anchor bolt network gangue bag wall body for coal mining without pillars. The gob-side entry retaining method comprises the following steps of: A, crushing solid wastes obtained by separating tunneling gangue and / or coal gangue until the granularity is small than 0.1m and bagging by adopting plastic woven bags to obtain gangue bags; B, conveying the gangue bags obtained in the step A to the position of a working surface, which is used for building an entry, through an underground conveying system and fixing the gangue bags for building a roadside gangue bag wall body to form a gob-side entry; C, arranging the gangue bag wall body into a plurality of steps with different heights; and D, building the gangue bag wall body to the designed position and height and then mounting anchor bolts and paving a metal net, and simultaneously, paving a vertical protection steel belt, carrying out two-way anchoring or single-side pretightening in a large-pallet lane and keeping a gangue bag filling body in the gangue bag wall body in a three-dimensional stress state to achieve the functions of increasing the side pressure of the gangue bag filling body and improving the strength and the rigidity of the filling body.

The present invention provides a capacitance pressure sensor having a traces structure which can stably measure a pressure. A capacitance pressure sensor according to an embodiment of the present invention includes: a substrate having a first insulation layer to a third insulation layer; a diaphragm placed to face the substrate so that a reference chamber is formed between the diaphragm and the substrate; a first electrode on the substrate 1, facing to the diaphragm; a second electrode on the diaphragm, which is disposed so as to face the first electrode; a trace connected to the first electrode, for electrically connecting the first electrode to the outside; and a second trace connected to the second electrode, for electrically connecting the second electrode to the outside. The traces penetrate the first insulation layer from the reference chamber side of the substrate toward the side opposing to the reference chamber of the substrate, and also are bent between each of the insulation layers.

An ink cartridge includes a main case and a flexible film. The main case includes an ink-holding portion for holding ink. The ink-holding portion has an indented surface portion and an open side. The flexible film covers the open side of the ink-holding portion. The flexible film has a shape that substantially follows shape of the indented surface portion when substantially no ink is held in the ink-holding portion.