632results about How to "Stable flow rate" patented technology

A raw material gas supply apparatus includes a raw material container, a carrier gas inlet line and a raw material gas line. The raw material container is configured to accommodate the solid raw material. The carrier gas inlet line is configured to discharge the carrier gas to the raw material gas originated from the solid raw material. The raw material gas is transferred to the consumption area together with the carrier gas through the raw material gas line. A flow rate of the carrier gas is set such that a variation rate of a gas flow rate of the raw material gas flowing in the raw material gas line obtained by subtracting a gas flow rate in the carrier gas inlet line from a gas flow rate in the raw material gas line becomes 10% or less.

A flow rate control apparatus includes a base section, wherein the base section is composed of a plurality of stacked metal plates. The flow rate control apparatus further includes a pressure control section, which regulates pressure of a pressure fluid (gas) that flows through a first passage in the base section, a pressure sensor that detects pressure of the pressure fluid flowing through a second passage, and a flow passage-switching section, including first to third orifices, for throttling the fluid pressure-regulated by the pressure control section so as to have a predetermined flow rate, and which has first to third ON / OFF valves for switching fourth to sixth passages for respectively directing the pressure fluid toward a pressure fluid output port.

The invention relates to a smoke gas on-line monitoring system and a smoke gas on-line monitoring method, and aims at providing the smoke gas monitoring system and the monitoring method which have the advantages of being simple in structure, high in automation degree and accurate in monitoring. The system comprises a pitot pitometer, a smoke gas sampler, a particulate matter monitor, sampling pipelines and demarcating pipelines, wherein the pitot pitometer, the smoke gas sampler and the particulate matter monitor are all provided with anti-purging devices, signal receiving terminals of all the anti-purging devices are respectively connected with a central controller, and all the anti-purging devices are controlled by the central controller to regularly purge. Smoke gas collected by the smoke gas sampler successively passes through a first refrigerator, a gas filter, a second refrigerator and a membrane type filter, the collected smoke gas is cooled and filtered by the first refrigerator, the gas filter, the second refrigerator and the membrane type filter, and the rest smoke gas finally obtained is fed into a multicomponent gas analysis instrument to be analyzed and detected. For the system, whole calibrated pipelines and partial calibrated pipelines are also arranged, so that the analysis instrument in a line can be wholly calibrated and partially calibrated.

The invention provides a method for tracing pollution sources in emergency events. The method is characterized by comprising steps of 1, constructing source-quality response scene databases, to be more specific, creating fixed and mobile pollution source databases in certain ranges of river basins and hydrological scene databases of river basins where projects are located, simulating pollution statues of the project river basins due to pollutants of each pollution source under the conditions of different hydrological scenes and different emission amounts and creating the source-quality response scene databases in project regions; 2, carrying out source tracing analysis and computation, to be more specific, investigating and screening the pollution sources in the source-quality response scene databases according to feature information of the pollutants and hydrological regime information, finding out possible pollution sources which meet requirements of screening targets, constructing target libraries, analyzing pollution procedure fitting degrees of the target libraries, sorting the target libraries according to the fitting degrees, determining risk sources which possibly cause the emergency pollution accidents, and further conforming the risk sources by means of verification. The method has the advantage that the locations and the pollutant emission amounts of the pollution sources can be quickly determined by the aid of the method.

In a liquid cooling jacket, to improve the heat transfer coefficient, extensibility and assembling, the liquid cooling jacket comprises a base bonded to a heating element; a post standing perpendicularly to the base; a plurality of radiating fins attached to the post and arranged so as to be parallel to the base; a partition filling up intervals between the plurality of radiating fins at a predetermined width; and a case which surrounds the post and the radiating fins and is bonded to the base, and to which an inlet and an outlet for coolant are attached at positions where flow of the coolant is divided by the partition. The plurality of radiating fins may be arranged at intervals each of which is narrow in comparison with a thickness of each of the plurality of radiating fins. Therefore, because the coolant flow within the liquid cooling jacket ensures a plurality of passages, the passage resistance is low. In addition, by setting the size of each of the inlet and outlet for the coolant to be substantially equal to the height of the arranged radiating fins, the flow rates on the radiating fins can be even.

The invention belongs to the field of construction materials and particularly relates to novel foam high-polymer composite and a production method. The novel foam high-polymer composite comprises 10-90 parts of thermoplastic plastics, 0.5-3 parts of plasticizer, 0.5-3 parts of flexibilizer, 0.5-3 parts of tackifier, 0.3-2 parts of internal and external lubricant, 0.5-3 parts of stabilizer, 0.5-5 parts of crosslinking modifier, 0.5-12 parts of regulator, 0.5-5 parts of foaming agent, 0.5-3 parts of filler, 0-20 parts of flame retardant, 10-90 parts of inorganic powder and pigment in proper quantity. The novel foam high-polymer composite in the technical scheme is energy-saving, emission-reducing, acid-resistant and alkali-resistant, weak in temperature sensitivity and excellent in physical and chemical performance.

The invention discloses a single-manipulator automatic ultrasonic non-destructive detection device which comprises the following components of an industrial control machine, a manipulator device, an ultrasonic transmitter-receiver set, a water coupling device and an auxiliary device, wherein the manipulator device comprises a joint-type six-degree-of-freedom manipulator, a manipulator controller, a power supply and a signal integrated wire cable; the ultrasonic transmitter-receiver set comprises a phased array ultrasonic transducer, an ultrasonic pulse transmitter-receiver card and a high-speed data collecting card; the water coupling device comprises a water spraying nozzle, a pressure stabilizing and flow stabilizing water pump and a flexible guide pipe; and the auxiliary device comprises a camera, a monitor, an adjustable workpiece support and a water recycling groove. The device is suitable for ultrasonic reflection method detection of workpiece thin layer and front surface; compared with the traditional device, the device can implement automatic ultrasonic detection of complex and irregular curve surfaces, has high detection efficiency, has very wide part adaptability and system flexibility, and has wide industrial application prospect.

To keep one of three hydraulic pumps unaffected by variations in torque of the remaining hydraulic pumps when the three hydraulic pumps are used, displacements of the first and second hydraulic pumps are controlled based on their own delivery pressures P1, P2 and a pressure P3′ obtained by reducing through a reducing valve 14 a delivery pressure P3 from the third hydraulic pump, while a displacement of the third hydraulic pump 3 is controlled only by its own delivery pressure P3. The pressure oil delivered from the third hydraulic pump 3, therefore, remains unaffected by variations in delivery flow rates from the first and second hydraulic pumps 1,2, in other words, by variations in their torque consumptions, so that the third hydraulic pump is assured to provide a stable flow rate.

The invention provides a multi-grade continuous polyplant of polylactic acid materials, which is synthesized by the ring-opening polymerization of a lactide monomer. The multi-grade continuous polyplant consists of a polyplant device and a feed device with different characteristics, including a prepolymer reaction kettle set, a double-screw reaction squeezer, a fused mass feed pump, a static mixer and a tubular reactor. Compared with the plant for adopting a single double-screw reaction squeezer to synthesize the polylactic acid materials, the multi-grade continuous polyplant disperses and lightens the load of the reaction devices of each grade as a multi-grade plant is used for replacing a single-grade reaction plant, thus leading the control on the conversion rate of the lactide monomer to be easier and more stable; as the fused mass feed pump is connected in series in the middle, the floating speed of the materials and the pressure of the squeezer and a subsequence device can be stabilized, the reaction condition can be better controlled; as the back section of the plant is provided with the static mixer and the tubular reactor, the final conversion rate of the lactide monomer can be further improved, thus being beneficial to improving and adjusting the molecular weight and the molecular weight distribution of the polylactic acid materials.

The invention discloses a V8 type gray cast iron cylinder body casting pouring method which is carried out by adopting a core assembly pouring mode. The V8 type gray cast iron cylinder body casting pouring method comprises the following steps of: 1, setting a pouring position of a casting; 2, arranging a pouring system; 3, assembling a core assembly; and 4 pouring. Compared with the prior art, the V8 type gray cast iron cylinder body casting pouring method has the characteristics of relatively simple core assembly structure, high yield and low production cost.

The invention provides a test device for forming a high-speed stable flow field. The test device comprises a water tank, wherein an outlet is formed at the side wall of the water tank; the outlet is connected with a horizontal flow channel through a pipeline; the horizontal flow channel comprises a drainage section, a stabilizing section, a contraction section, a test section and an expansion section; the water tank is connected with an air supply system and a pressure control system through a pipeline, wherein the air supply system comprises an air source pressure tank and an air compressor, the air source pressure tank is connected with the water tank through an air inlet pipeline, and a flow control valve is formed on the air inlet pipeline; and the pressure control system comprises the flow control valve, a PLC (programmable logic controller), a pressure transmitter and the water tank, and the pressure transmitter is arranged on an outlet axis of the water tank. A method for forming the high-speed stable flow field comprises the following steps of: driving the flow through high-pressure air, and controlling the high-pressure air by the pressure control system, namely controlling the pressure of an inlet of the horizontal flow channel to be stable, so as to obtain the stable flow velocity at the test section. Through the device and the method, a high-speed and stable test flow field with excellent flow field quality can be formed.

The invention discloses a drying removal method and a device for sintering flue gas. When the high-temperature flue gas enters an inlet flue (1) of a rapid mixing zone (4), an absorbent is added for removing a part of harmful gas; the flue gas form the rapid mixing zone (4) enters a circulating fluidization reaction zone (7) after the speed increase by an accelerating zone (5), water spray is carried out at the front end of the circulating fluidization reaction zone (7) for temperature decrease, and the circulating fluidization reaction zone (7) continually removes the residual harmful gas; the purified flue gas enters a gas-solid separator (9) through an outlet flue (8) of a reaction tower and then enters the rapid mixing zone (4) through a circulating fluidization clino slot (12), and the flue gas after the purification is emitted to a chimney (11) through an induced draft fan (10); a clean flue gas re-circulating flue (14) is arranged on an exhaust flue of the induced draft fan (10), and the other end of the clean flue gas re-circulating flue (14) is connected with the inlet flue (1) of the reaction tower.

In a liquid cooling jacket, to improve the heat transfer coefficient, extensibility and assembling, the liquid cooling jacket comprises a base bonded to a heating element; a post standing perpendicularly to the base; a plurality of radiating fins attached to the post and arranged so as to be parallel to the base; a partition filling up intervals between the plurality of radiating fins at a predetermined width; and a case which surrounds the post and the radiating fins and is bonded to the base, and to which an inlet and an outlet for coolant are attached at positions where flow of the coolant is divided by the partition. The plurality of radiating fins may be arranged at intervals each of which is narrow in comparison with a thickness of each of the plurality of radiating fins. Therefore, because the coolant flow within the liquid cooling jacket ensures a plurality of passages, the passage resistance is low. In addition, by setting the size of each of the inlet and outlet for the coolant to be substantially equal to the height of the arranged radiating fins, the flow rates on the radiating fins can be even.

A variable displacement pump includes a control valve formed with a high-pressure chamber for introducing therein high-pressure fluid on the upstream side of a metering orifice, a pressure chamber for introducing therein pressure fluid on the downstream side of the metering orifice, a low-pressure chamber arranged between the high-pressure and pressure chambers for introducing therein low-pressure fluid, and a communication passage for providing fluid communication between one of the high-pressure and low-pressure chambers and a first fluid-pressure chamber of the pump. First and second recessed grooves are formed in the outer-peripheral surface of a spool of the control valve to provide fluid communication between the low-pressure and high-pressure chambers through the communication passage of the control valve when the spool carries out selective switching between the high-pressure and low-pressure chambers to supply fluid to the communication passage, thus restraining abrupt pressure rise in the first fluid-pressure chamber.

The invention discloses a plate-type evaporator. The plate-type evaporator comprises an evaporating area (1) which is formed by compactly connecting a plurality of evaporating heat exchange pieces (11) for realizing heat exchange between a refrigerating medium (A) and a refrigerating fluid (B); an overheating area (2) which is formed by compactly connecting a plurality of overheating heat exchange pieces (21) for realizing heat exchange between the refrigerating medium (A) passing through the evaporating area (1) and a thermal fluid (C) passing through a condenser; the evaporating area (1) is separated from the overheating area (2) by a guide plate (3) which is provided with a guide groove (31) guiding the refrigerating medium (A) heated by the evaporating area (1) to the overheating area (2). The sectional area of the guide groove (31) is equal to the open area of guide connectors (32) at both ends. The evaporator solves the problems that current evaporator occupies a large space and has low heat exchange efficiency.

The invention relates to a bioreactor for three-dimensional tissue cell perfusion culture. A reaction chamber, a liquid storage tank and a peristaltic pump are sequentially connected through transfusion pipes, wherein the reaction chamber comprises a box cover and a box body comprising lateral walls, a bottom wall, a cut-off device, an overflow insert plate, screen frames, a static pressure channel, a sluice channel and a draining channel; the cut-off device is a gate or a weir flow dam, and a plurality of uniformly arranged water holes are formed in the same plane along the longitudinal section of the cut-off device; an overflowing opening matched with the draining channel is formed in the lateral wall of the static pressure channel; and the screen frames are fixed on two lateral walls of the box body. The invention also relates to a bioreactor with a laminated structure, which can be used for solving the problem of cell death easily caused by non-uniform flow field and non-uniform nutritional transfer in the existing perfusion culture, is suitable for three-dimensional culture of tissue cells, can be used for improving the quality of tissue engineering products, and has the characteristics of good expansibility, strong universality and wide application range.

The invention discloses a paper-base micro-fluidic chip for hemoglobin detection in whole blood, and manufacture and application of the paper-base micro-fluidic chip. Various functional units, such as cytoplasm pre-separation, hemocyte elution, cell lysis and hemoglobin release, interference impurity removal and a three-electrode system, are processed on a paper base through silk-screen printing and laser engraving technologies; the chip comprises fan elution tanks with laser etching array microfractures with different densities, which are used for multiple speedy washing of hemocyte and hemoglobin by different eluents; the chip accelerates the electron transfer between the hemoglobin and electrodes through a polishing carbon working electrode simply and physically modified by methylene blue, so that the three-electrode system has large current response and detection ranges; the three-dimensional paper-base micro-fluidic chip with a three-dimensional structure through simple superposition and partial turnover of the functional units in different zones of the chip can be obtained; the while detection process is simple in operation, the analysis speed is high, the size of a sample required is small, and the chip is applicable to rapid detection of hemoglobin content in whole blood for family practice, field emergency treatment in remote areas and underdeveloped areas.

The invention relates to a novel circulation experiment water tank. The novel circulation experiment water tank is composed of a U-shaped elbow, wing-shaped flow deflectors, a bolt, a flange, two steel wire nets, a straight tube, a cambered cone-shaped tube, a minor-diameter straight tube, a U-shaped water tank body and a long tapered tube. The whole water tank is made of organic glass, high in transparency and mechanical strength, light in weight and easy to machine. The wing-shaped flow deflectors are small in resistance and good in diversion feature, and the fluid flow speed is effectively controlled. The straight tube and the cambered cone-shaped tube are connected through the bolt and the flange, and can be dismounted conveniently. The steel wire nets are installed in the straight tube section, a water flow vortex flowing from the U-shaped elbow is divided into small vortexes, impact to the water tank is relieved, and the water flow can be inclined to being straight. The long tapered tube effectively prevents an inner bounding layer of the long tapered tube from disengaging. The cambered cone-shaped tube is in a streamline shape and effectively prevents a boundary layer from disengaging, the two ends of the cambered cone-shaped tube are connected through the flange, installation is convenient, and the cambered cone-shaped tube is easy to replace. The novel circulation experiment water tank is good in adjusting performance, stable in operation, convenient to manufacture, even in internal fluid flowing speed and simple in structure, provides great convenience to the actual application, and can be widely applied to indoor hydraulics experiments.

Provided is a separation membrane element for filtration which has excellent filtration performance and is excellent in terms of chemical resistance and mechanical strength and with which a stable permeation flow rate can be obtained over a long period of time. A separation membrane element for filtration is configured to perform solid-liquid separation treatment by being immersed in a liquid to be treated which contains a suspended component, and includes a cylindrical filtration membrane obtained by forming a porous sheet including at least an expanded porous PTFE (polytetrafluoroethylene) membrane into a cylindrical shape and in which a hollow surrounded by the porous sheet serves as a treated-liquid passage; a support member for maintaining the hollow serving as the treated-liquid passage; and sealing parts which seal both axial-direction ends of the cylindrical filtration membrane so as to leave at least one treated-liquid takeout opening open.

An object of the present invention is to achieve favorable injection molding with reduced mold clamping force required for molding and with suppression of weld line occurrence without repeating trial and error manually, by prompt calculation of adequate production parameters, when conducting injection molding of resin products. When the injection molding is conducted using a mold having a plurality of resin inflow conduits N, R, G1, G2, and G3 to the cavity CV, the combination of a numerical analysis method for calculating the injection molding process and a computer-aided optimization method, derives the production parameters which determine time-sequentially the inflow of resin material through resin inflow conduits.

The invention discloses a liquid medicine filtering membrane. The liquid medicine filtering membrane is a silicon dioxide ceramic membrane, wherein the pore diameter of the silicon dioxide ceramic membrane is 1.8-2.8 microns, and the porosity of the silicon dioxide ceramic membrane is 70-75 percent. The liquid medicine filtering membrane is low in price, high and stable in filtering rate, stable in flow rate, safe and reliable. The invention also discloses a preparation method of the liquid medicine filtering membrane, a liquid medicine filter using the liquid medicine filtering membrane, and a precise transfusion device using the liquid medicine filter.

Two nozzles 37 in pair are provided along an inner circumferential surface 21a of a concavity 21, air is blown out in a space from a blowout hole 37a provided at a tip end portion of the nozzle from a side where the nozzle 37 is provided aiming at an opposite side along an inner circumferential surface of the space and a powder contained in the concavity 21 is caused to rise up in the space, whereby the condition of the powder mixed with the air within the space is improved.

The invention belongs to instrument technical field, in particular to a thermal expansion continuous micro-flow high-pressure gradient pump of high-effect liquid spectrometer, composed of a pressure-resistance heating pump, a micro-flow pump control system, a switch valve, a pressure sensor, and a liquid bottle connected in turn. The invention uses the theory of liquid thermal expansion, via pre / real-time calculation to control the heating process of heated liquid, to obtain micro-flow at 10-5 to 10-9L / min level via increasing temperature, as constant flow, linear gradient liquid flow and other types, and the output pressure can reach 10-35MPa. And the invention uses a valve switch system to realize automatic alternative operation of two pump groups, to confirm continuous output of micro flow, and realize at least binary flow equal / gradient watch, and uses dual-pressure balance point exchange technique, to confirm stable flow speed and stable pressure in pump switch.

The invention relates to an oil pipe threaded connection structure, which is formed by screwing an oil pipe end (10) with an outer thread together with a pipe joint (11) with an inner thread. The threads adopted by the oil pipe end (10) and the pipe joint (11) are both approximate trapezoidal tapered threads; the head part of the oil pipe end (10) is provided with a circular arc surface (4); a circular conical surface (3) in interference fit with the circular arc surface is arranged on the pipe joint (11); the head part of the oil pipe end (10) is provided with an outer torque step (8); an inner torque step (7) matched with the outer torque step (8) is arranged on the pipe joint (11); the middle segment of the heat part of the oil pipe end (10) is provided with an outer cylindrical surface (2); an inner cylindrical surface (1) in interference fit with the outer cylindrical surface (2) is arranged on the pipe joint (11). The structure has the advantages of high threaded connection strength, good sealing performance, easy buckling, difficult buckling separation, good thread gluing preventing performance, strong over-torque preventing capability, etc.

The invention belongs to the technical field of plastic extruders, and provides a plastic extruder head which comprises a head gland, an end plate, a barrel and a plurality of filter element tubes. The end plate is connected to an outlet of the barrel, the filter element tubes are arranged in the barrel and are fixedly mounted on the end plate, the head gland is connected to an end of the barrel in a threaded manner, at least two filter screens cover the outer surface of each filter element tube, and the filter precision of the filter screen on an inner layer of each filter element tube is higher than that of the filter screen on an outer layer of the filter element tube. The plastic extruder head in an embodiment of the invention has the advantages that as the filter screens cover the outer surface of each filter element tube, large impurities in plastic melt remain outside the filter screens, and blockage can be avoided when the plastic melt which is primarily filtered by the filter screens flows via through holes on the filter element tubes.

The invention discloses a testing apparatus for a fluid resistance performance of a flat plate surface. The testing apparatus is characterized in that a water tank, a frequency conversion pump, a settling chamber, a diffusion section, a contraction section, a working section and a spreading section are communicated successively to form a water circulation system. A test box is arranged above the working section and a lower opening is communicated with an upper pipe wall of the working section; and a bottom of a horizontal testing flat plate suspended inside the test box is flush with the inner wall of the upper pipe wall of the working section to form a constituent part of a flowing channel and the part is located above the flow of the working section. A pressure contact of a pressure sensor is in movable contact with a suspension rod of the testing flat plate along a horizontal direction; and the pressure sensor and a programmable logic controller arranged outside the test box are connected electrically. Therefore, a drag reduction effect of the flat plate surface after texturing or reducing material coating can be measured accurately; the stable flow is obtained based on the precise structure design of the water circulation system; and the interference like friction between the frame of the pipe wall and the flow is eliminated by suspending the testing flat plate. Moreover, the testing method is simple and is easy to operate; and the testing is accurate.

The invention discloses a microbial limit detection method of miconazole nitrate suppository. The method comprises dissolving sample with sodium chloride-peptone buffer solution (pH 7.0) containing 10 vol% polysorbate 80 (Tween 80), adding 20ml of isopropyl myristate, and washing with aqueous solution containing 0.1 vol% polysorbate 80 and 0.1 wt% peptone. Membrane filtration method is adopted for bacteria, mildew, yeast, Staphyloccocus aureus and Monilia albican, with recovery rate all above 70%. Culture medium dilution method is adopted to detect Pseudomonas Aeruginosa. The addition of isopropyl myristate can accelerate fat / water layer separation, shorten experiment time, stabilize flow rate, reduce test cost, and achieve strong operability.

The invention relates to a rapid continuous flow synthesis process of fluoroethylene carbonate and an integrated continuous flow reactor for realizing the process. The continuous flow synthesis process is characterized in that a raw material to be fluorinated and fluorine gas are used as reactants, and are continuously and successively subjected to steps of mixed dispersion, fluorination reaction,gas-liquid separation, so as to obtain the fluoroethylene carbonate; and the synthesis process is carried out in the integrated continuous flow reactor, the raw material to be fluorinated and the fluorine gas are continuously added to a feed inlet of the integrated continuous flow reactor, and the fluoroethylene carbonate is continuously obtained from a discharge port of the integrated continuousflow reactor with the reaction time equal to or less than 600 s. The process is a rapid, safe, efficient, highly versatile and easy for mass production continuous synthesis process of the fluoroethylene carbonate.