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Multifunctional gas sensor testing system

The invention discloses a multifunctional gas sensor testing system. The multifunctional gas sensor testing system comprises a gas distribution mechanism and a gas distribution chamber, a testing chamber, a control system, a testing mechanism and a vacuum pump, wherein the gas distribution mechanism is used for preparing standard-concentration gas and background gas for the gas distribution chamber; prepared standard-concentration testing gas is stored in the testing chamber and the testing chamber is used for testing a sensor sensitive property under standard concentration of gas to be tested; and the control system is used for controlling gas preparation in the gas distribution chamber and the testing chamber, and comprises temperature and humidity control, gas pressure or vacuum degree control, gas mass and flow control, on-off control of each gas-path solenoid valve, starting/stopping control of the vacuum pump, starting/stopping control of a stirring fan, and testing process control of a detected sensor. According to the multifunctional gas sensor testing system disclosed by the invention, rapid contact of the sensor and standard gas is realized by automatically preparing the standard-concentration gas, and the temperature and humidity of a sensor testing environment also can be controlled; and synchronous testing of electric gas responding of the plurality of sensors and optical gas responding of the single sensor also can be realized.
Owner:HUBEI UNIV

Microreactor and system for liquid-liquid multi-phase reaction and liquid acid alkylation method

The invention relates to the technical field of organic synthesis chemistry and particularly relates to a microreactor and system for a liquid-liquid multi-phase reaction and a liquid acid alkylation method. The microreactor comprises an inner pipe and an outer casing pipe, the inner pipe and the outer casing pipe are coaxial, the inner tube and the outer casing pipe form an annular microchannel, a first diversion pipe, an inner film pipe and a second diversion pipe having the same external diameters are orderly connected to form the inner pipe, the upper side of the outer casing pipe is provided with a heavy phase inlet, an end cap is arranged between one end of the outer casing pipe and the wall of the first diversion pipe, the other end of the outer casing pipe is provided with a product outlet, the heavy phase inlet and the inner pipe are arranged so that a heavy phase flow and a light phase flow contact in a parallel flow way and a distance-determination structure is arranged in the annular microchannel. The system comprises the microreactor, a light phase storage device, a heavy phase storage device and a separation device. The liquid-liquid phase interfaces of the microreactor are increased by 10 times or more than that of the general reactor so that the small size, high efficiency, high selectivity, large treatment amount, small energy consumption and high universality are realized.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Sowing machine capable of realizing intelligent precision dibbling

The invention relates to a sowing machine capable of realizing intelligent precision dibbling. The method comprises a master controller (13), a rack (1), a transmission assembly (8) arranged on the rack, a substrate filling assembly (3), an indenting assembly (7), a seed dibbling assembly (6) and an earthing assembly (4), wherein the seed dibbling assembly is realized by adopting the following manner: a seedling raising plate moves to a position sensor and triggers a master control system to control a stepping motor to drive a sowing roller to rotate, seeds enter a corresponding sowing hole when the sowing roller rotates, unnecessary seeds on the sowing hole are cleaned by virtue of a gas seed cleaning device, seeds reserved in the sowing hole are dropped at a fixed position by virtue of a seed protective device, the seeds enter the corresponding holes along a guide pipe, and thus the accurate sowing is realized. The sowing machine disclosed by the invention solves the technical problems that the conventional sowing is inaccurate, the time and the effort are wasted and the working efficiency is low; and the sowing machine disclosed by the invention has the advantages of high sowing accuracy, accurate and passive indenting, simplicity, energy conservation and high efficiency.
Owner:XIAN SENWAS AGRI SCI & TECH

Device for depositing individual printed products, supplied in succession, in shingle formation

InactiveUS20070164501A1Reliably flawlessly deposit less-flexibleFast processingFunction indicatorsArticle deliveryEngineeringMechanical engineering
A device for depositing individual printed products (4), preferably magazines, brochures or book blocks, that are supplied in succession by means of a feed conveyor (2) on a downstream conveyor (3) with slower transport speed (v3) in shingle formation (5), wherein said device comprises a stream feeder (1) that receives the printed products (4) from the feed conveyor (2) by means of rotating grippers (6a to e) that are opened and closed in the appropriate cycle with the aid of a stationary cam (12) and deposits the printed products on the downstream conveyor (3). In order to reliably and flawlessly deposit the printed products, particularly thick and / or less flexible printing products, in shingle formation, the stream feeder includes a plurality of grippers (6a to e) that are rotatively driven with a slower speed (v2) than the feed speed (v1), wherein the grippers (6a to e), opened for receiving the printed products, respectively include a short pocket (7) with a bottom stop (8), with which the respectively supplied printed product (4) comes in contact due to the higher feed speed (v1). The clamped transport takes place within an angular range (β) of the rotational movement of the grippers, namely up to a defined distance upstream of a stripping element (10) for reliably releasing the printed products (4). They drop on the downstream conveyor (3) along a short path.
Owner:KOLBUS

Neutral blockage removing agent composition used for oil recovery formation in oilfield and preparation method thereof

The invention relates to a neutral blockage removing agent composition used for an oil recovery formation in an oilfield. The neutral blockage removing agent composition is prepared from the following raw materials in parts by weight: 10-14 parts of polyepoxysuccinic acid amine, 35-40 parts of diethylenetriaminepentaacetic acid amine, 33-37 parts of hydroxyl succinic acid amine, 20-25 parts of polyacrylamide, 7-10 parts of sodium polyaspartate, 10-14 parts of sodium gluconate, 10-15 parts of activated clay, 20-25 parts of potassium peroxodisulfate, 9-11 parts of hydroxyl butanedioic acid amine, 4-7 parts of sodium salicylate, 5-9 parts of hexamethylene tetramine, 0.2-0.3 part of vanadium pentoxide, 2-5 parts of starch, 5-8 parts of alpha-sulphonated fatty acid methyl ester and derivative thereof (MES) and 0.1-0.3 part ofdiethyl ethanolamine. The neutral blockage removing agent composition is used for the blockage removal of an oil pumping well and a screw pump well in the oilfield, can effectively solve the problems of cleaning blockage removal of the oil pumping well and the screw pump well in the oilfield and the corrosion of oil recovery equipment, has high blockage removing speed, is neutral and is free of corrosion; waste liquid for blockage removal can be degraded and does not need to be discharged onto the ground to be subjected to sewage treatment, no corrosion, dead angle, precipitation or secondary well blockage are generated, and more safety and more reliability are realized as compared with traditional pickling blockage removing, biological blockage removing and solvent blockage removing.
Owner:兰州熙瑞化工科技有限公司

Method and device for treating and maintaining black and odorous water body by inoculating with activated sludge

The invention discloses a method and device for treating and maintaining a black and odorous water body by inoculating with activated sludge, and belongs to the technical field of water environment control. According to the method and device for treating and maintaining the black and odorous water body by inoculating with the activated sludge, the black and odorous water body is treated synchronously by ''inoculating with the activated sludge and planting floating plants'', the amount of active microorganisms with degradability in the water body is increased, the removal effect of organic pollutants in the water body is improved and the nutrient pollution ammonia nitrogen concentration is reduced; and the device for treating and maintaining the black and odorous water body is a workboat which integrates the functions of activated sludge addition, sediment collection, ventilation and oxygenation, mixing of sludge and water, floating plant collection and transmission, compression and dehydration and the like, conducts in-situ control and remediation without destructive work on the water ecology, and has broad application prospects in the field of black and odorous water body control.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY

Continuous processing technology for non-shrink treatment of chlorine-free wool top and wool product

The invention relates to a continuous processing technology for non-shrink treatment of chlorine-free wool tops and wool products. The continuous processing technology comprises the following steps: non-shrink treatment, washing, inactivation of protease, softening, dehydration, and drying. On the basis of the characteristic that wool fiber is protein fiber, the processing technology employs a high-efficiency integrated catalysis system composed of protease, a water-soluble aliphatic tri-substituted organic phosphine structured activator, a metal salt and a nonionic surfactant to efficiently and partially remove scales on the surface of the wool fiber so as to realize modification of the scales; thus, the felting performance of wool products is improved, dimensional stability of wool products is enhanced, and the requirement for machine washability is met. The continuous processing technology provided by the invention can replace chlorination anti-shrinkage methods in the prior art, avoids environmental pollution caused by the chlorination methods and is a clean treatment process according with environmental requirements. The continuous processing technology is small in usage amounts of reagents, low in cost, simple in process, low requirements on equipment and capable of realizing continuous operation and industrial production.
Owner:天津市诺奥科技发展股份有限公司

Rewetting repairable modified waterborne white latex and preparation method thereof

ActiveCN109306250ASolve irreparable technical problemsSensitive rehumidity responseMonocarboxylic acid ester polymer adhesivesNon-macromolecular adhesive additivesPersulfateAdhesive
The invention relates to the technical field of waterborne adhesives and in particular relates to rewetting repairable modified waterborne white latex and a preparation method thereof. A formula comprises the following components: 35.0 to 50.0 parts of de-ionized water, 10.0 to 20.0 parts of protective colloid polyvinyl alcohol, 0.5 to 2.5 parts of a non-ionic emulsifier, 0.5 to 2.5 parts of a buffering agent, 0.5 to 1.5 parts of a persulfate initiator, 0.01 to 0.05 part of a chain transfer agent dodecyl mercaptan, 25.0 to 54.0 parts of vinyl acetate, 5.0 to 15.0 parts of butyl acrylate, 5.0 to 15.0 parts of a carboxyl-containing polymerizable monomer, a crosslinking agent and the like. Compared with the prior art, the white latex provided by the invention can be used for realizing secondary adhesion through the effect of water and the technical difficult in the prior art that the white latex cannot be repaired after the white latex is cured into a film is overcome; the wet-state adhesion performance of the white latex is greatly improved; the rewetting repairable modified waterborne white latex has the advantages of rapid rewetting viscosity response, good initial adhesion positioning and high bonding strength.
Owner:DONGGUAN STAR COSM POLYMER

Deburring machine

The invention discloses a deburring machine. The deburring machine comprises a loading station, a plane abrasion station and a teeth sweeping station, wherein the three stations are respectively and correspondingly provided with a loading mechanism, a plane abrasion mechanism and a teeth sweeping mechanism. The deburring machine also comprises a station shifting mechanism for transferring workpieces from the previous station to the next station; the plane abrasion mechanism comprises a first motor, a speed reduction transmission mechanism connected with the first motor, a grinding wheel, a revolution adapting piece and a rotation driving piece, wherein the revolution adapting piece is connected with an output shaft of the speed reduction transmission mechanism; the rotation driving piece and the revolution adapting piece rotate relative to each other; the rotation driving piece is eccentric to the output shaft of the speed reduction transmission mechanism; the grinding wheel is concentrically connected with an output shaft of the rotation driving piece. By adopting the structure, the grinding wheel simultaneously does revolution motion and rotation motion in the operating process, and the motion track forms an envelope line track, thus, the workpieces are conveyed to the lower part of the grinding wheel by virtue of the clamping mechanism, and the operating surface of the grinding wheel can be quickly in contact with the end surfaces of the workpieces, therefore the deburring efficiency is greatly improved.
Owner:HUBEI AVIATION PRECISION MASCH TECH CO LTD
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