42results about How to "No drift phenomenon" patented technology

The invention relates to a washing method for a spinneret plate, and mainly solves the technical problems in the prior art that the spinneret plate cannot be cleanly washed, gel is adhered to the surface of the spinneret plate, a spinning solution at the outlet of a spinneret hole overflows, and polyacrylonitrile protofilament has more broken filaments and more thin filaments and is high in fiber breakage rate. The washing method for the spinneret plate comprises the following steps of disassembling the spinneret plate from a spinning assembly; immersing the spinneret plate in a solvent in a container; then immersing the container in water bath; washing by adopting a mode of combining temperature rising with ultrasound; taking out the spinneret plate after the washing is completed; blowing the surface of the spinneret plate by gas which is precisely filtered after the spinneret plate is dried; completing the washing. According to the technical scheme, the problems are well solved, and the washing method can be used in a device washing process after the spinning of the polyacrylonitrile protofilament.

The invention relates to a combined cleaning method for a spinneret plate with the aim of solving technical problems in the prior art such as long cleaning time, incomplete cleaning, high rate of plugged holes of the spinneret plate and many broken filaments of original filaments. The combined cleaning method for the spinneret plate is adopted and comprises following steps: detaching the spinneret plate on a spinning assembly, soaking the spinneret plate dipped with spinning solution to solidified solution, taking out the spinneret plate after spinning solution of the spinneret plate is solidified and tearing off solidified spinning solution on the spinneret plate; putting the spinneret plate into a container holding a cleaning solvent and putting the container into an ultrasonic water bath for cleaning; and putting the cleaned spinneret plate into an air-blast drying box for drying; and finally, utilizing gas filtered by a filter core of certain filter precision to blow and sweep the dried spinneret plate for less than 1min. The technical scheme of the combined cleaning method for the spinneret plate helps solve the problem and can be used for the equipment cleaning process following spinning of original filaments polyacrylonitrile.

The invention relates to a large continuous air supply type air-heated vaporizer. The large continuous air supply type air-heated vaporizer comprises a heat exchange fin tube bundle which is arranged between a liquid inlet and an air outlet and arranged in a matrix mode, the heat exchange fin tube bundle is divided into an undercooling section, an evaporation section and a heating section which are parallel from the liquid inlet to the air outlet, the undercooling section, the evaporation section and the heating section are connected between the liquid inlet and the air outlet in series, each of the undercooling section and the heating section comprises at least one row of heat exchange fin tubes, the evaporation section comprises a plurality of rows of heat exchange fin tubes which are connected in series. According to the air-heated vaporizer, the undercooling section, the evaporation section and the heating section of the heat exchange fin tube bundle are connected in series, the evaporation section comprises the plurality of rows of heat exchange fin tubes which are connected in series, the arrangement is reasonable, the structure is compact, the overall rigidity is high, the vaporizer is attractive and elegant in appearance, cryogenic fluids can be distributed to pipes evenly, bias current can be avoided, and requirements for high-flow continuous air supply are met.

The invention discloses a plating method for a laser high-reflective film. Multiple commonly-used simple-substance film materials with high refractive indexes are mixed according to a certain proportion, and the mixed film materials are adopted for plating of a laser reflective film, so that the damage resistance threshold and the reflectivity of the laser reflective film are greatly improved. According to the laser reflective film formed by plating with such a series of mixed film materials as high-refractive-index materials and with SiO2 as a low-refractive-index film material, the damage resistance threshold is increased by 15%; the absorption is reduced; the mechanical strength is increased; and no wavelength drafting phenomenon is generated.

The invention discloses a methanation reactor and a methanation technology. The methanation reactor comprises a shell, a gas inlet tube, a cylinder, a gas outlet tube and a micro-reaction channels, and a catalytic active component can be loaded in the micro-reaction channels. Compared with methanation reactors in the prior art, the methanation reactor disclosed in the invention has the advantages of small use amount of a catalyst, low bed pressure drop, short gas retention time, high reaction bed space utilization rate, no gas flow deflection and no short circuit in the methanation reaction process.

The invention provides a large-deformation flexible mechanism formed by connecting two large-deformation flexible hinges in series. Each large-deformation flexible hinge comprises six curve sheet flexible units, three inner arms and an outer ring, wherein one end of each curve sheet flexible unit is gathered on and fixed to a central point, the other ends of the six curve sheet flexible units are evenly distributed on and fixed to the outer ring, every two curve sheet flexible units are in axial symmetry to form a curve sheet flexible unit set, the three curve sheet flexible unit sets are in central symmetry about the central point, the three inner arms are located at the symmetry axis positions of the three curve sheet flexible unit sets respectively, one end of each inner arm is fixed to the central point, and the other ends of the inner arms are connected with mechanical input connectors. The curve sheet flexible unit sets are used for establishing the distributed-type blade-shaped rotary flexible hinges, when the centers of the hinges are subjected to the torque effect, the flexible hinges cannot generate the rotation center drifting phenomenon, under pure torque drive, the errors of the deformation positions of the hinges do not exceed 2%, and the rotation errors do not exceed 9%.

The invention discloses a quench-type reactor. The reactor comprises a radial cylindrical sealed pressure-bearing shell (1), an air inlet pipe (18), an air outlet pipe (10), as well as an axial micro-channel reaction zone (21) and an axial catalytic reaction zone (7), wherein gaps (13) are formed between the axial micro-channel reaction zone (21) and the axial catalytic reaction zone (7); cooling medium distributors (11) are arranged in the gaps (13); at least one cooling medium inlet is formed in the shell (1) corresponding to the side face of each gap (13); the cooling medium inlets are connected with the cooling medium distributors (11) through cooling medium pipelines. The reactor is small in usage amount of active ingredients of the catalyst, low in pressure drop and low in bed temperature and avoids a 'temperature runaway' phenomenon.

The invention relates to a wire winding machine precision wire winding device. The wire winding machine precision wire winding device comprises a wire winding device rack, a wire winding guide wheel, a photoelectric emission and receiving support, a photoelectric switch, a guide wheel left-right micro-motion motor reducer, guide wheel left-right micro-motion slide rails, a guide wheel front-back movement motor reducer, guide wheel front-back movement slide rails, a wire winding device base, a wire winding machine rack, a take-up reel, a guide wire left-right limiting retaining device, a pneumatic braking device, a take-up speed reducer motor, a wire winding speed reducer motor, a reel lifting motor and an external automatic power supply control system. Through cooperation of all the mechanisms, a flat winding wire is precisely coiled on the reel. By adopting the wire winding machine precision wire winding device provided by the invention, the wire winding precision is improved, and the phenomena that wire unwinding and clamping or wire surface scratches are caused due to the fact that a wire is arranged not to reach the edge, is overlapped and drifts are avoided.

The invention discloses an axial micro-catalytic reaction unit and application thereof. The axial micro-catalytic reaction unit is characterized in that the axial micro-catalytic reaction unit comprises a column and micro-reaction channels axially penetrating the column; the place above the column is communicated with a fluid below the column only through the micro-reaction channels; and the the micro-reaction channels are provided with upper micro-reaction channel openings and lower micro-reaction channel openings with different diameters. The axial micro-catalytic reaction unit provided by the invention can be applied to reactions with changes in reaction volume, enables the usage amount of a catalyst to be small, and is low in pressure drop, short in retention time, high in space utilization rate and free of the phenomena of bias current and short circuit of gas.

The present invention discloses an axial micro-channel coupling reactor and applications thereof. The axial micro-channel coupling reactor comprises a cylindrical sealing pressure bearing shell, inlets and outlets for two kinds of raw material gases, and an axial catalysis reaction zone arranged in the shell, wherein the axial catalysis reaction zone comprises a plurality of axial micro-reaction channels coated with catalytic active components on the inner surface and the outer surface. According to the present invention, with the axial micro-channel coupling reactor, the two reactions such as heat release and heat absorption can be achieved in the one reactor, and particularly the reactor is suitable for one of the catalytic reactions having the significant volume change; the heat release reaction and the heat absorption reaction are integrally performed in the same reactor so as to simplify the original process and reduce the equipment cost; and the reactor has advantages of low catalyst active component consumption, high space utilization rate, high energy utilization rate, and high raw material conversion rate.

The invention relates to a water spraying and cooling system for a bearing test of a free high-temperature compression member. The water spraying and cooling system comprises metal supports arranged at the periphery of the compression member, wherein a lower fastening ring is arranged on the metal supports; the compression member is arranged at the central position of the lower fastening ring; the ring surface of the lower fastening ring is horizontal, and a plurality of free rocker arm assemblies are arranged on the ring surface at intervals; cooling water spraying nozzles are arranged at the overhanging ends of the free rocker arm assemblies; the spaces between water spraying heads of the cooling water spraying nozzles and the compression member are adjustable; and the cooling water spraying nozzles point to the center of the ring surface of the lower fastening ring and are obliquely arranged upwards. The water spraying and cooling system disclosed by the invention can be used for cooling a high-temperature cylindrical compression member and a high-temperature square compression member; cooling water uniformly distributes along the vertical wall surface, and the cooling effect is better; relative positions between the cooling water spraying nozzles and the compression member are controlled by using the free rocker arm assemblies, and the simplicity and the flexibility in operation are realized; the aim of meeting technical requirements of a cooling process test of the high-temperature square compression member is achieved; and in addition, the water spraying and cooling system has the advantages of simple structure, small size and convenience in disassembly and assembly.

The invention provides a blow tank odor treatment system and a treatment method, and aims to solve the technical problem of air pollution caused by direct emission of odor due to difficulty in treatment caused by large gas displacement during blowing of the blow tank. The treatment system comprises a condensation ejector connected with the blow tank and a dirty hot water tank connected with a water inlet of the condensation ejector, wherein an outlet of the dirty hot water tank is connected with a water inlet in one side of the condensation ejector after passing through a heat exchanger. The treatment method is carried out through the system and comprises the steps: S1, before blowing of the blow tank, water is supplied to the condensation ejector in advance for a certain time, and micro-negative pressure is established in the exhaust pipe; and S2, after the pressure of the system is stable, slurry pumping is started, water is continuously supplied to the condensation ejector, and water flow enters the condensation ejector at a certain pressure and temperature after heat exchange and is sprayed out in an atomized foam and high-speed jet flow mode. The problem that gas displacement is large and difficult to treat can be effectively solved, and it is avoided that odor is directly exhausted to pollute air.

Provided in the invention is a three-level inverter comprising an A-phase high-power switch, a B-phase high-power switch, and a C-phase high-power switch. The high-power switches are connected in parallel. The A-phase high-power switch is formed by parallel connection of an A-phase first switch module and an A-phase second switch module; the B-phase high-power switch is formed by parallel connection of a B-phase first switch module and a B-phase second switch module; and the C-phase high-power switch is formed by parallel connection of a C-phase first switch module and a C-phase second switch module. Each switch module contains a current input terminal and a current output terminal; and one of the current input terminal and the current output terminal is connected in series with an inductor and then is connected in parallel. With the inductors, precise current equalization of each module is realized and the bias current phenomenon can be effectively avoided. The three-level inverter also has outstanding characteristics of simple structure, easy realization, and stable performance.

The invention relates to the field of chromatographic analysis, particularly to a high performance liquid chromatography detection method for 9,9-bis(4amino 3chlorphenyl) fluorene in a film. Accordingto the method, water and acetonitrile are selected as mobile phases to efficiently analyze the content of 9,9-bis(4amino 3chlorphenyl) fluorene in an extraction liquid obtained through extraction pretreatment so as to determine the content of a to-be-detected substance in a film; the obtained chromatographic peak is sharp in peak pattern, good in symmetry, small in baseline fluctuation and free of drifting phenomenon; and the proper detector wavelength is selected, the obtained chromatographic peak signal intensity is proper, analysis and calculation are facilitated, errors are reduced, and the accuracy is improved. The analysis method disclosed by the invention is high in sensitivity and accuracy, low in detection limit and quantification limit, early in chromatographic peak appearance retention time, high in analysis efficiency and capable of quickly obtaining an analysis result.