43results about How to "Stable gas pressure" patented technology

A spray head structure of a spray gun includes a shunt ring, and two end surfaces of which are extended outward with positioning pillars corresponding to position holes of a fixing seat and the spray gun, respectively. An end surface of the shunt ring, facing to the spray gun, is provided with a shunt sink and an outer gas hole, and the fixing seat is provided with a connection hole and a cover ring. Gas inside the spray gun can be shunted to an interior of spray head and pressure of the gas can be stabilized, by locking a nozzle with the shunt ring and the fixing seat.

An apparatus and a method for measuring gas mass-transfer diffusivity of film material relate to an apparatus and a method for measurement of a film material. The apparatus comprises two connected vacuum chambers, that is, a measurement chamber and a plenum chamber of which the background leak rate has been determined. The measurement chamber and the plenum chamber are connected through an air exhaust channel with a sealing flange, the sealing flange faces to the side of the plenum chamber, and flange covers and seal rings are utilized for sealing and fixing a disc-shaped blind flange or a test piece; the plenum chamber is provided with an openable plenum chamber door for facilitating mounting or dismounting of the blind flange or the test piece; and the plenum chamber is provided with a plenum-chamber pressure gage, a pneumatic pipeline with a pressure-adjusting control valve and a pumping pipeline with a plenum-chamber valve. The apparatus employs a porous ceramic support material and accelerates gas transportation rate by utilizing a vacuum pump for making a larger pressure difference, and for film materials with low permeability, the apparatus can rapidly obtain stable gas pressure and gas flux data and has accurate measurement result.

The invention provides a pipeline gas pressure stabilization regulating system including a pressure monitoring system and a pressure regulating system, the pressure regulating system includes a fuel tank, a first pressure release valve and solenoid switch connected in turn, the solenoid switch connects to a first buffer vessel set, the other end of the first buffer vessel set connects to a regulating valve set by a second buffer vessel set, then connected to a combustor on the one hand; on the other hand the other end of the first buffer vessel set separately connects a secure boot flame and an igniter by a general pressure reducer; a gas pressure sensor in the pressure monitoring system is arranged on the top of the first buffer vessel set and the second buffer vessel set. The inventive system can reduce gas pressure wave motion for maintaining stabilization of the pipeline gas pressure.

The invention discloses a gas pressure control system and method. The gas pressure control system comprises a fuel cell controller FCU and a first back pressure regulator and/or a second back pressure regulator; the first back pressure regulator and/or the second back pressure regulator are/is connected to the FCU; the first back pressure regulator is arranged in an air outlet of a fuel cell stack; the second back pressure regulator is arranged in a hydrogen outlet of the fuel cell stack; the FCU is used for obtaining air pressure data of the air outlet of the fuel cell stack and/or the hydrogen pressure data of the hydrogen outlet of the fuel cell stack and regulating an opening angle of the first back pressure regulator according to the air pressure data and/or regulating an opening angle of the second back pressure regulator according to the hydrogen pressure data. The system and the method solve the problems that the low gas pressure in a flow channel of a fuel cell can affect the reaction efficiency of the fuel cell, the high gas pressure leads to difficulty in pile stealing, and the increase of differential pressure of gas at two sides is easy to cause a damage to a diaphragm in the existing technology.

Two shutter plates form a double rotary shutter mechanism. A cylindrical second deposition shield is interposed between the first shutter plate disposed on the side of a target and the second shutter plate so as to surround a first opening formed in the first shutter plate. A cylindrical first deposition shield is interposed between a sputtering cathode and the first shutter plate so as to surround the front surface region of the target. This makes it possible to prevent a sputtering substance from passing through the gaps between the first shutter plate and the second shutter plate and between the first shutter plate and the sputtering cathode, and to, in turn, prevent generation of any cross-contamination.

The invention provides an apparatus and a method for determining gas diffusion coefficient of a low-intensity low-permeability coating material, which relates to the coating material coefficient determination apparatus and the method thereof. The apparatus comprises two paralleled vacuum chambers of a measuring chamber and an aeration chamber which are connected through an air exhaust channel with a seal flange, the seal flange faces to one side of the aeration chamber, a disk shaped blank flange or a test sample is fixed in a sealing mode by using a flange gland and a sealing ring; an operable aeration chamber door is arranged in the aeration chamber, which is used for arranging or dismounting the blank flange or the test sample; an aeration chamber pressure gauge, an aeration pipeline having a pressure adjusting control valve and an air exhaust pipeline having an aeration chamber valve are arranged in the aeration chamber; the measuring chamber pressure gauge and the air exhaust pipeline having a measuring chamber valve are arranged in the measuring chamber, and the background leakage rate of the measuring chamber is relatively stationary. The apparatus can use a thin coating material for measurement, for the low-permeability coating material, data for stabilization of gas pressure and gas flux can be rapidly acquired, and the measurement result is accurate.

The invention discloses a sensitive and stable atomic fluorescence generating system capable of atomizing continuously. The system comprises an electrically heated quartz tube, an argon source, a solution atomizer, a gas-liquid separating and gas mixing device, a water seal, and a hydrogen generator, wherein the solution atomizer is connected with the argon source and the gas-liquid separating and gas mixing device which is respectively communicated with the hydrogen generator, the electrically heated quartz tube and the water seal. The sensitive and stable atomic fluorescence generating system capable of atomizing continuously has the advantages of stable flame, high atomic fluorescence sensitivity and high sample atomizing efficiency, and has the characteristic of continuous sample introduction, so that an analytical instrument can reduce the measurement error through prolonging the measurement time so as to obtain ideal measurement precision and detection limit.

The invention relates to a gas control device. The gas control device comprises two gas inlet pipes provided with gas inlet valves, and two gas outlet pipes provided with gas outlet valves. The gas control device is characterized in that the gas control device is further provided with a gas storage chamber, and a water drainage valve is arranged below the gas storage chamber. By arranging the gas storage chamber, it is ensured that gas pressure in a pipeline can be kept within the working pressure range, the working pressure standard can be met even when an air curtain spraying device is suddenly started, and no pressure loss phenomenon can be generated. Moisture condensed in the pipeline can be removed through the gas storage chamber, and corrosion to the whole pipeline caused when moisture can not be removed and is accumulated can not happen. Foreign matter which can possibly be generated in a gas way is eliminated, and the danger that air curtain spraying holes are blocked by the foreign matter is reduced. Impact of high-pressure gas on the pipeline is reduced, the service life of the pipeline is prolonged, the working pressure of high-pressure gas is stabilized, and normal work of an air curtain spraying system is ensured.

The hydraulic gas storage cylinder is one stable gas storing and supplying apparatus with stable gas pressure and high fuel gas purity. It consists of gas storing cavity, water pressure cavity, and water or solution. There are partition board set between the gas storing cavity and water pressure cavity, gas inlet pipe, gas outlet pipe and by-pass pipe in the top of the gas storing cavity, water inlet pipe and overflow pipe in the top of the water pressure cavity, and water draining pipe in the lower part of the water pressure cavity.

The invention provides a method for manufacturing a dry-mixed mortar anti-segregation silo. The dry-mixed mortar anti-segregation silo is composed of a silo body (1), a feed pipe (2), an air outlet pipe (3), an arch breaking cone (4), an arch breaking cone support (5), an arch breaking chain (6), a vibrator (7), a level meter (8), a discharge port (9), a control system (10) and wires ((11). The feed pipe (2) of the silo is arranged in a tank body in an inverted-U shape. A plurality of openings (12) are evenly distributed in the pipe wall of a descending section of the feed pipe (2). The arch breaking cone (4) is arranged below the bottom end of the descending section of the feed pipe. The arch breaking cone (4) is fixed into the silo body (1) through the arch breaking cone support (5). The upper end of the arch breaking chain (6) is fixed to the outer side of the bottom end of the descending section of the feed pipe (2). The lower end of the arch breaking chain (6) penetrates through the middle position of the arch breaking cone support (5) and is freely suspended. The air outlet pipe (3) is obliquely arranged in the silo body. The level meter (8) is mounted in the position, close to a cone, of the outer side of the silo body (1) and connected with the control system (10) and the discharge port (9) through the wires ((11). By adopting the dry-mixed mortar anti-segregation silo, the segregation phenomenon happening to dry-mixed mortar can be effectively avoided.

The invention discloses a method for preparing aldehyde by catalyzing internal olefin based on a phosphoramidite phosphine ligand, which comprises the following steps: performing homogeneous reaction on the internal olefin, an organic solvent, a rhodium complex and the phosphine ligand in synthesis gas, thereby efficiently and highly selectively converting the internal olefin into the aldehyde through homogeneous hydroformylation. For example, straight-chain aldehyde can be generated from common internal olefin in a high-selectivity manner, dialdehyde can be generated from cyclic diene in a high-selectivity manner, the whole reaction system is mild in condition, fewer hydrogenation products are generated, the catalyst can be recycled, the production cost is reduced, and the production safety is improved.

The invention discloses a pressure adjuster. An adjusting handle is arranged at the top of an upper cavity of a valve body; a second-stage voltage stabilizing module is arranged under the adjusting handle; an upper spring base, an adjusting spring C and a lower spring base are arranged between the adjusting handle and the second-stage voltage stabilizing module in sequence; a pressing block in abutting fit with a valve rod at the upper end of the second-stage voltage stabilizing module is arranged in the lower end center of the lower spring base; a first-stage voltage stabilizing module and asafety valve module are assembled in cavities on the two sides of the valve body, and communicate through a communicating channel A; an intake nut is assembled in a cavity at the lower part of the valve body through threaded fit; an intake mouth is assembled in the center in the intake nut, and communicates with the communicating channel A; the first-stage voltage stabilizing module and the second-stage voltage stabilizing module communicate through a communicating channel B; and an exhaust port of the second-stage voltage stabilizing module communicates with an exhaust port on the surface ofthe valve body through an exhaust channel. The adjuster is simple in structure, excellent in voltage stabilization performance, convenient to install and maintain, small in size, low in weight and convenient to carry.

The invention relates to a space microgravity double-layer suspension vibration isolation device, a scientific experiment cabinet and a suspension method.The space microgravity double-layer suspension vibration isolation device comprises a jet suspension experiment table (outer body for short) and a magnetic suspension experiment table (inner body for short), the inner body is provided with a magnet, the outer body is provided with an electromagnetic coil, the inner body is embedded into the outer body, and the magnet and the electromagnetic coil are arranged correspondingly; the inner body is controlled to suspend relative to the outer body by the acting force generated by the electrified coil in the magnetic field; a thruster is arranged on the outer body, and the thruster is used for jetting airflow to generate thrust to control the outer body to suspend. According to the invention, the double-layer non-contact movement of the outer body following the inner body is realized from the hardware level, and the disturbance of the basic environment is isolated, so that the high microgravity level is realized.

The invention provides a gas generating agent of a fire-extinguishing device and a preparation method thereof and relates to the technical field of fire fighting and fire extinguishing. The gas generating agent comprises a main component and auxiliary components, wherein the main component is prepared by the following materials in percent by weight: 60-70% of potassium nitrate, 10-20% of melamine and no less than 5% of foaming agent; and the auxiliary components comprise the following materials in percent by weight: 6-12% of adhesive and no more than 5%. The gas generating agent provided by the invention has the advantages that the components are simple, the cost is low, the generated gas is stable in pressure and strong in continuity, and the gas generation amount is large, so that the fire extinguishing efficiency of the fire-extinguishing device is high and the like.

The invention relates to a liquefied fuel gas system. One end of a fuel gas main pipeline is connected with liquefied fuel gasification devices. The other end of the gas main pipeline is connected with a diffusion pipeline, and gas branch pipelines are arranged on the fuel gas main pipeline. One or more sets of liquefied fuel gasification devices are connected in parallel. Each set of liquefied fuel gasification device comprises an annular pipeline, wherein at least two liquefied fuel bottles connected through a hose are arranged on the annular pipeline, an outlet of the annular pipeline is connected with gasification equipment through a pipeline, a fuel main ball valve is arranged on a pipeline of the outlet of the annular pipeline, and a fuel gas pressure regulating valve and a pressure gauge are sequentially arranged on an outlet pipeline of the gasification equipment. A diffusion ball valve and a diffusion cap are arranged on the diffusion pipeline. The number of the fuel gas branch pipelines is the same as that of flame paths of a pot-type furnace, and the tail ends of the fuel gas branch pipelines are connected with burners. The liquefied fuel gas system has the advantages that the system can maintain stable gas pressure, the heating rate can be conveniently and accurately controlled, and meanwhile the safety performance is reliable.