330results about How to "Less prone to clogging" patented technology

The present invention comprises an improved extruder die assembly and method for using same to improve the quality of dimensional design aspects of extruded, complexly shaped, direct expanded food products. The improved system includes an improved die assembly comprising a first die and a second die having at least one orifice. A majority of the total pressure drop occurs in the first die to pre-expand the dough prior to the dough entering the second die. The orifices in the first die can be individually configured to obtain differing dough flow speeds resulting in a desired flow pattern. A plurality of extruded dough ropes formed at each orifice exit of the first die can meld together in the bore and exit the second die. Color or flavor can be added at the first die to enhance the food product.

The invention discloses a spiral static mixer which is applied to mixing of multiple materials and particularly mixing of high-viscosity materials. The spiral static mixer comprises a shell, mounting flanges, left rotating blades and right rotating blades and is characterized in that the mounting flanges are respectively arranged at the two ends of the shell, the left rotating blades and the right rotating blades are in multiple-spiral blade structures and sequentially and alternately arranged from an inlet of the shell to an outlet of the shell, the adjacent left rotating blades and right rotating blades are fixedly connected at the periphery in a staggering manner, and a washing lifting ring is connected at one end of a blade group formed by the left rotating blades and the right rotating blades. The spiral static mixer provided by the invention has the advantages of simple structure, high mixing efficiency, convenience and fastness in installation, low cost, convenience in washing and suitability for long-time working; a mixed blade unit can be replaced; and the spiral static mixer is more widely applied to mixing of the high-viscosity materials in the chemical engineering industry.

The invention provides a biomembrane reactor, which comprises an outer cylinder with a water inlet and a water outlet provided at the bottom part; an inner cylinder arranged in the outer cylinder, two ends of the inner cylinder are communicated with the outer cylinder, the top of the inner cylinder is lower than the top of the outer cylinder; a filling material used for filling a bio-contact oxidation tank of the inner cylinder; a filter material used for filling the biological filter tank between the inner cylinder and the outer cylinder; an aeration apparatus provided at the bottom of the outer cylinder, the aeration apparatus is communicated with the inner cylinder. The invention provides a waste water treating system and a method for treating waste water. The biomembrane reactor provided in the invention has the functions of the bio-contact oxidation tank and the biological filter tank, waste water forms a circulation between the inner cylinder and the outer cylinder under the promotion effect of the aeration apparatus, and waste water passes through the filling material used for bio-contact oxidation tank and the filter material used for biological filter tank for a purifyingprocess, thereby the effect of treating waste water can be improved.

The present invention comprises an improved extruder die assembly and method for using same to improve the quality of dimensional design aspects of extruded, complexly shaped, direct expanded food products. The improved system includes an improved die assembly comprising a first die and a second die having at least one orifice. A majority of the total pressure drop occurs in the first die to pre-expand the dough prior to the dough entering the second die. The orifices in the first die can be individually configured to obtain differing dough flow speeds resulting in a desired flow pattern. A plurality of extruded dough ropes formed at each orifice exit of the first die can meld together in the bore and exit the second die. Color or flavor can be added at the first die to enhance the food product.

The invention discloses a method for preparing a micro-nanometer fluid system through the compound developing of positive and negative photoresists. Specifically, the method comprises the steps of: taking a glass sheet as the substrate, preparing a positive photoresist layer with a raster pattern, coating the surface of the positive photoresist layer with a SiO2 film, then spin-coating the surface of the SiO2 film with a negative photoresist layer, fully exposing and developing the photoresist layers, thus obtaining the micro-nanometer fluid system. Being novel and simple, the preparation method of the invention ensures the uniform size and unfrequent obstruction of channels. With a high success rate, the method has flexible operation, low preparation cost, no need for expensive experiment equipment, thus being beneficial for large scale production.

The invention relates to a multi-layer multi-size fraction composite prefilling sieve tube suitable for sand prevention of silty-fine sand. The multi-size fraction composite prefilling sieve tube suitable for the sand prevention of the silty-fine sand comprises a base tube, an internal wire winding layer, a multi-size fraction composite filling layer, an external wire winding layer and an externalprotection cover in sequence from inside to outside, wherein the outer surface of the base tube is sleeved with the internal wire winding layer, the outer portion of the internal wire winding layer is sleeved with the multi-size fraction composite filling layer, the multi-size fraction composite filling layer is composed of three layers, gravels fill the gaps between the layers, the thickness ofeach layer is different from that of other layers, and the grain sizes of the gravels of different gaps between different layers are different; the outer portion of the multi-size fraction composite filling layer is sleeved with the external wire winding layer, and the external protection cover serves as the outermost layer. Compared with existing methods of gavel filling sand prevention and mechanical sieve tube sand prevention, the multi-layer multi-size fraction composite prefilling sieve tube has the advantages that the sand prevention layer is thick, the useful life is long, the sand prevention layer function and the circulation function can both provided, and the sand prevention effect and oil-gas well high yield are kept. The multi-layer multi-size fraction composite prefilling sieve tube suitable for the sand prevention of the silty-fine sand is suitable for the sand prevention of petroleum, natural gas and natural gas hydrate silty-fine sand.

The invention provides a batch data processing method, a front-end system, a host and a batch data processing system. The method comprises the following steps: acquiring transaction data to be processed submitted by a user; sorting the transaction data to be processed according to a processing type of the transaction data to be processed, and extracting transaction data needing to be processed by the host; temporarily storing the transaction data needing to be processed by the host, and meanwhile generating an unprocessed transaction record of which a main key is a user transaction ID (Identity); de-queueing the temporarily-stored transaction data in a first-in first-out way, summarizing the de-queued transaction data and transmitting the summarized transaction data to the host in batches; and acquiring a transaction processing result generated by the host according to the transaction data, updating a state of a corresponding unprocessed transaction record according to the transaction processing result, and meanwhile feeding back the state of the corresponding unprocessed transaction record to the user. Through adoption of the batch data processing method, the front-end system, the host and the batch data processing system, the problem of system bottleneck caused by high transaction concurrence is solved; the network bandwidth pressure is lowered; the data processing efficiency is increased; the stability of the system in the case of data concurrence is improved; and the production security is ensured.

The invention discloses an open flow passage type rotating nozzle capable of being applied to ground covering, and belongs to the field of irrigation equipment. The nozzle comprises a ground covering mechanism and a spray irrigation mechanism, wherein the spray irrigation mechanism comprises a water inlet pipe, a rotating platform, a plurality of connecting columns and a spinning nozzle; the spinning nozzle comprises a plurality of arc pipelines and taper baffles; longitudinal arc openings are formed in the side walls of the arc pipelines, so that a cavity of each arc pipeline forms an open flow passage; the bottoms of the arc pipelines are connected with one another in a closed way, so as to form a taper bottom of the spinning nozzle; a longitudinal jet hole is formed in the taper bottom; the tops of the arc pipelines are divergent outward from the taper bottom along the radial direction; a taper baffle is connected with a position between the end parts of the side walls of each two adjacent arc pipelines. Each arc pipeline is warped for a preset angle in the same direction. The rotating platform is rotationally sleeved to the water inlet pipe; the plurality of connecting columns are fixed between the rotating platform and the taper baffles; the longitudinal jet hole is opposite to the upper pipe orifice of the water inlet pipe; the water inlet pipe is connected with an underground water inlet pipeline through the ground covering mechanism. The nozzle can increase the range under low pressure.

The invention discloses a hydrogen liquefaction process. The hydrogen liquefaction process comprises the following steps that firstly, raw material hydrogen is compressed and purified; then, the compressed and purified gaseous hydrogen is subjected to gaseous hydrogen ortho para conversion; then the mixed liquid hydrogen is subjected to liquid hydrogen ortho para conversion, and finally the liquidhydrogen is stored in a liquid hydrogen storage tank, and the gasified low-temperature gaseous hydrogen in the liquid hydrogen storage tank is recycled for using in the liquefaction process, so thatthe energy consumption required for hydrogen liquefaction is reduced and the cost is reduced. By adopting the hydrogen liquefaction process, high-purity liquid hydrogen can be obtained, and the parahydrogen concentration in the liquid hydrogen is not less than 98%, the orthohydrogen concentration which spontaneously undergoes the ortho para conversion in the liquid hydrogen is effectively reduced,and evaporation loss of the liquid hydrogen is little, and little potential safety hazard.

The invention discloses a flue gas purification system device and application thereof, relating to the technical field of air purification. The device comprises a heat exchanger, a liquid ammonia storage tank, an air compressor, an air mixer, a supergravity rotary filling bed-electric field coupling device, an antifoamer, an electric mist precipitator, a liquid storage pool and a chimney. The supergravity rotary filling bed-electric field coupling device couples an electric field inside the rotary filling bed, so as to integrate flue gas oxidoreduction-absorption; NO in the flue gas is oxidized by ozone produced by the electric field in a supergravity inner cavity or is reduced by amino radicals produced by ammonia gas in the electric field and then enters a filling material to be forced to absorb, so that pollutants such as nitrogen oxides, hydrogen chloride, sulfur dioxide, hydrogen fluoride and dust in the flue gas are eliminated. The flue gas purification device has a simple structure, occupies a small area, has an easy technological process, has high gas-liquid mass transfer efficiency, and can remove 85% or more nitrogen oxides and 98% or more hydrogen chloride, sulfur dioxide, hydrogen fluoride, dust and the like.

The invention discloses a gas flow regulation device for a rotary spray pipe value of a solid rocket-ramjet engine. Each of a first fixed part and a rotating part is provided with one central hole andtwo arc-shaped holes in the axial direction; the front end of a transmission shell and an axial outlet section of a rear sealing head shell of a combustion chamber form a dynamic sealing structure; the tail end of the transmission shell and the head end of a spray pipe shell form a dynamic sealing structure; an outer ring of a thrust self-aligning roller bearing is mounted and fixed to the interior of a shell hole in the head end of the spray pipe shell; and the inner ring of the thrust self-aligning roller bearing is fixed to a shaft neck of the tail end of the transmission shell in a matched manner. A driving motor drives a driven gear to rotate to determine a corresponding angle of a transmission ratio, and finally, drives the rotating part to rotate at a corresponding angle relative to the first fixed part, so that the two arc-shaped holes of the rotating part and the fixed part are staggered and sheltered in the axial direction, thereby changing the effective outlet circulation area of the gas of the combustion chamber and realizing gas flow regulation with determined accuracy. The gas flow regulation device for the rotary spray pipe value of the solid rocket-ramjet engine isbetter in transmission mechanism thermal protection, more compact in structure and has higher work reliability, and can realize higher-precision and larger-range gas flow regulation.

The invention discloses an artificial fish reef in a steel-frame structure and aims to overcome the defects that an existing artificial fish reef is single in shape and function and low in economical benefit, is easy to block if being used in sea for a period of time, is adverse to gathered life of a fish school, and the artificial fish reef under the sea is relatively poor in stability and easy to swing to affect life of the fish school. The artificial fish reef in the steel-frame structure disclosed by the invention comprises an algae culture matrix and a fish reef matrix, wherein the lower end of the fish reef matrix is fixedly connected with a steel rack and the algae culture matrix is connected with an impact ball for impacting the fish reef matrix; high pressure gas for flushing a fish sheltering cavity is arranged on the fish reef matrix; the impact ball triggers a resilient mechanism to cut a gas cover, so that high pressure gas escapes to flush the fish sheltering cavity so as to prevent the fish sheltering cavity from being blocked. The artificial fish reef not only can provide a place for the fish school to inhabit, reproduce and shelter enemies, but also can be used for cultivating algae, so that the artificial fish reef is high in economical benefit. The artificial fish reef put in use is good in stability, and the fish sheltering cavity in the fish reef matrix is hardly blocked.

The invention provides a design method for a spiral single-channel non-blocking centrifugal pump impeller. The impeller is applicable to the fields of sewage treatment, channel cleanout, silt dredging and the like. The design formula of main geometric dimension parameters of the impeller is provided, wherein the parameters include the major diameter D of an outlet of the impeller, the diameter Dj of an inlet of the impeller, the radius Rs of a rear cover board of the impeller, the inclination angle a of the outlet edge of the impeller, the width b of the outlet edge of the impeller, the blade wrap angle phi and the blade outlet mounting angle beta. The spiral single-channel non-blocking centrifugal pump impeller designed according to the method can improve the condition of flowing of multiphase flow media in the impeller, and the conveying capacity and stability of the non-blocking pump impeller can be improved on the condition of conveying media containing large-grained objects prone to being wound.

The invention discloses a microfluidic syringe filter head and a use method thereof. The filter head uses a microfluidic technology to concentrate and enrich micro-particles or cells, wherein a spirally extending micro-flow channel and a Y-shaped forked flow channel communicated with the micro-flow channel are formed inside the filter head; micro-particles of sample liquid are subjected to dragging force in a flowing direction, and are also subjected to inertial lifting force and Dean dragging force perpendicular to a main flowing direction in the micro-flow channel; under coupling action of the two transverse forces, the micro-particles may be gradually focused to a wall surface on one side close to a spiral center to form a regular arrangement bundle and flow out along a branch inside the Y-shaped forked flow channel so as to collect the concentrated sample liquid. The micro-flow channel and the Y-shaped forked flow channel in the invention are arranged on the same plane so as to effectively reduce a volume occupied by the flow channels and benefit to miniaturization of the filter head; the filter head is simple in use method and suitable for use in the field and low-hardware configuration laboratory environments.

The invention discloses an air conditioning unit drainage structure for a railway vehicle. The air conditioning unit drainage structure comprises a drainage disk arranged on the bottom plate of an air conditioning unit, and is characterized by also comprising a first-level water seal structure and a second-level water seal structure; the first-level water seal structure comprises a cover body covered on the drainage disk of the air conditioning unit; the bottom of the cover body is provided with a plurality of notches; the notches and the bottom of the drainage disk form a water inlet passage; a bypass passage is formed in the middle of the cover body; the second-level water seal structure is a variable cross-section drainage pipe; and the opening of the variable cross-section drainage pipe is positioned at the bottom of the drainage disk in the cover body. The required installation space of the air conditioning unit drainage structure is small, the air conditioning unit drainage structure can overcome the negative pressure of the air conditioning unit sufficiently, and has a water seal function; and dust is hardly blocked.

The invention provides a spraying quenching and fractional condensation process and device for the pyrolysis and liquefaction of biomass, coal or oil shale. A heavy liquid is cooled and flows back, and then the heavy liquid is sprayed into pyrolytic gas with high temperature from the throat of a Venturi tube by a quenching oil atomized nozzle, wherein the pyrolytic gas with high temperature flows through a pyrolytic gas inlet tube in a Venturi type; the atomized oil is in full contact with the pyrolytic gas and is quenched, which lowers the temperature of the oil below 300 DEG C, and then the oil enters a tower shell at a high speed in the tangential direction; the oil and the gas are centrifugalized by a cyclone; the heavy liquid flows downwards into the bottom of the tower, and then the heavy liquid flows out from a heavy-liquid outlet and is pressurized by an oil pump and cooled by a heat exchanger; part of the heavy liquid flows back and is used as a cooling liquid while the other part of the heavy liquid is sent out to be used as a product; the oil and the gas separated by the cyclone flow upwards and successively pass through the first separation section for distillation and condensation to the forth separation section for distillation and condensation, and light liquids with different boiling ranges are obtained after the oil and the gas are condensed and separated gradually; the light liquids flow out from a light-liquid outlet and are pressurized by the oil pump and cooled by the heat exchanger; part of the light liquid flows back and is used as a cooling liquid while the other part is sent out to be used as a product; at last, noncondensable gas flows out from a gas outlet at the top of the tower shell and is used as a dry-gas product for pyrolysis.

The invention relates to an assembly connection structure of a fabricated shear wall structure. The structure comprises shear walls; section steel keels are respectively pre-buried at the connecting parts of the left and right shear walls to be connected horizontally; the section steel keels of the two shear walls are connected by means of damping devices; a bottom connection steel mold and a topconnection steel mold are respectively pre-embedded at the connecting parts of the upper and lower layer shear walls to be connected vertically; a hollow grouting filling area is formed between the bottom connection steel mold and the top connection steel mold; by grouting in the grouting filling area, the connection between the bottom connection steel mold and the top connection steel mold is realized. The steel molds are locally pre-embedded so as to realize the vertical connection of the shear walls, so that the alignment difficulty of a reinforcing steel bar and a sleeve during on-site hoisting of a prefabricated wall is greatly reduced, the construction quality is effectively guaranteed, and the reliability of the connection position is improved; a section steel keel structure is adopted by the horizontal connection of the shear walls, so that additional connecting ribs at connecting parts are omitted, the field installation difficulty is effectively reduced, and the constructionefficiency is increased.

The invention discloses a smooth artificial fish reef structure and aims to settle the defects of single function, relatively low stability after coming into service, easy shake, incapability of facilitating aggregated living of fish swarms and easy blockage in an existing artificial fish reef. The smooth artificial fish reef structure comprises an alga culturing substrate and a fish reef substrate. A pulling rope and a mesh bag are connected between the alga culturing substrate and the fish reef substrate. The alga culturing substrate is connected with impact balls which are used for impacting with a fish reef substrate. The fish reef substrate is provided with high-pressure gas which is used for flushing a fish sheltering chamber. The impact balls trigger a rebound mechanism. The rebound mechanism cuts a gas cover open. The high-pressure gas is discharged for flushing the fish sheltering chamber, thereby preventing blockage of the fish sheltering chamber. The artificial fish reef can become a place for inhibiting, breeding, bait acquiring and sheltering for the fish swarms, and furthermore can be used for culturing the alga. The fish sheltering chamber in the fish reef substrate after coming into service are not easily blocked. Furthermore high stability, high reliability and small vibration amplitude of the artificial fish reef after being input into sea are realized. Furthermore the artificial fish reef facilitates aggregated living of the fish swarms.

The invention relates to a continuous casting process for steel in the field of metallurgy, in particular to a continuous casting process for cold forging steel for low carbon boron-containing standard components. Casting powder special for the cold forging steel for the low carbon boron-containing standard components comprises the following chemical compositions in percentage by weight: 31+ / -1.0 percent of SiO2, 25.0+ / -4.0 percent of CaO, 10.5+ / -4.0 percent of Al2O3, less than or equal to 1.5 percent of Fe2O3, less than or equal to 4.5 percent of MgO, less than or equal to 2+ / -1.5 percent of F-, 9.0+ / -1.0 percent of K2O+Na2O, 16+ / -2.0 percent of C solid and less than or equal to 0.5 percent of H2O. By the continuous casting process, a water gap can be effectively prevented from blocking the normal crystallizer liquid level fluctuation in the casting process, small corner cracks of casting blanks are avoided, the continuous casting is smooth, the internal and external quality of the casting blanks are high, and the surfaces of the casting blanks are not provided with cracks.

The invention belongs to the field of paint, and discloses color paste for water-based ink, which is mainly prepared from the following raw materials in parts by mass: 200 to 600 parts of a disperse dye, 100 to 500 parts of a dispersing agent and 500 to 1200 parts of a solvent. The dispersing agent contains phenyl, a nitrogen-containing group and a hydrophilic group. The color paste is prepared bythe following steps: (1) weighing raw material components according to the formula ratio, adding the dispersing agent into the solvent, and stirring and mixing to prepare a premixed solution, and (2)adding the disperse dye into the premixed solution prepared in the step (1), carrying out stirring and mixing, grinding and filtering, and taking the filtrate to obtain the color paste. The dispersing agent not only contains an anchoring structure and can have strong adsorption capacity with the surface of the disperse dye and reduce the surface energy of the disperse dye, but also contains a hydrophilic structure, so that the stability of the color paste in water can be effectively improved. Therefore, the color paste stability is improved in water. The color paste prepared by the inventionis applied to water-based ink, and is applied to a high-speed printing process, so that a spray head is not easy to block.

The invention discloses a novel heat exchanger core, and belongs to the technical field of machine design. The novel heat exchanger core comprises n first fluid heat exchange plates and m second fluid heat exchange plates. The n first fluid heat exchange plates and the m second fluid heat exchange plates are arranged alternately. The first fluid heat exchange plates carry first heat exchange fluid, and the second fluid heat exchange plates carry second heat exchange fluid. Etching channels are etched in the first fluid heat exchange plates and the second fluid heat exchange plates correspondingly. Each etching channel comprises a heat exchange channel and a guide channel. Each heat exchange channel comprises straight channel bodies and oval channel bodies which are arranged alternately, wherein the straight channel bodies communicate with the oval channel bodies, and the long axes of the oval channel bodies and the center axes, in the fluid flowing direction, of the straight channel bodies are located on the same straight line. The guide channels are connected with the heat exchange channels and extend to the edges of the plates. According to the heat exchanger core, a gradual-contracting and gradual-expanding structure is adopted so that the heat exchanger core can adapt to a using condition with low working medium cleanliness, and the requirement for the cleanliness of fluid working media is lowered.

The invention provides a filter used for producing a nano-coating. The filter comprises a filter body and a filter cover, the filter body includes a main shaft, a filtering module and a filter screen, the filtering module is concentrically and detachably arranged in the filter body, the cooperating filter screen is arranged in the filtering module, the filter screen is uniformly provided with a plurality of through holes, and a feeding opening communicating with the inner chamber of the filter body is arranged at the upper end of the filter cover; and a discharging opening and an electric heating tube communicating with the interlayer of the filter body are arranged at the lower end of the filter body. The nano-material rapidly moves under the driving of helical blades, and is filtered by the filter screen, and a wall scraping device drives a scraper to rotate in order to momentarily clean the material on the inner wall of the filter body, so adherence to the wall is reduced, and the filtering efficiency and the filtering quality are improved; and the heating tube is used to heat in order to make the coating keep a high temperature and not form large blocks, and then the heated material is filtered by the filter screen, so the filtering effect is effectively enhanced, and the obstruction phenomenon is less likely to occur.

The invention discloses a novel rotor type concrete injection unit, and belongs to the field of anchoring and shotcreting support such as mine well lanes, railway (highway) tunnels and subways. The novel rotor type concrete injection unit comprises a chassis machine frame, walking wheels installed on the lower part of the chassis machine frame, a concrete injection machine body, an automatic setting accelerator adding mechanism, a dust removing device, a feeding device and a hydraulic tensioning device. Connecting bolts are installed at the left and right ends of the chassis machine frame, andthe chassis machine frame is provided with the dust removing device, a lower support rod, the feeding device, the automatic setting accelerator adding mechanism, an upper support rod, an injection machine body support frame, the hydraulic tensioning device and the concrete injection machine body from left to right in sequence. The novel rotor type concrete injection unit has the beneficial effects that the dust removal efficiency is high, tiny fine dust with the particle diameter larger than 5 microns can collected, and the dust removal efficiency can reach more than 99%; the novel rotor typeconcrete injection unit is flexible to use, can be arranged directly indoors and placed in small units near equipment; and the structure is relatively simple, the operation is relatively stable, theinitial investment is less, and the maintenance is convenient.

Disclosed is a 'duyiwei' capsule, which is prepared from 'duyiwei' extract medicinal powder, plant oil, liquid state polyethylene glycol, propylene glycol, Span-80, and twain-80.

The invention discloses a gasification furnace, comprising a furnace body, a furnace cover, a blower and a gas transmission system, wherein, the inner part of the furnace body is provided with a division plate which divides the inner chamber of the furnace body into a gas-producing chamber on the upper part and a furnace dust chamber on the lower part, the lower part of the furnace body is provided with a dust outlet and an air inlet; the air inlet is connected with the blower; the gas transmission system comprises a purifier, a secondary ventilation duct, a waste pipe and a fuel gas pipeline, wherein, the lower part of the purifier is provided with an air inlet which is connected with the air outlet of the gas-producing chamber, the upper part of the purifier is provided with the air outlet connected with the fuel gas pipeline; one end of the secondary ventilation duct with the air outlet of the blower, the other end thereof is connected with the fuel gas pipeline, the secondary ventilation duct is further provided with a switch valve, the waste pipe is connected with the fuel gas pipeline, the division plate is provided with a plurality of vent holes which are characterized in that the holes are evenly distributed at the periphery of the division plate. The gasification furnace of the invention is not prone to witness empty burning and has the advantages of high fuel gas conversion rate and good energy-saving property.

The invention belongs to the field of dust removers, and particularly relates to a self-adjusting dust remover. The self-adjusting dust remover comprises a shell and a dust collecting hopper, and an air inlet pipe and an exhaust pipe are fixedly connected to the side wall of the shell. The interior of the shell is provided with: an annular groove formed in the shell and formed in the inner side wall of the shell; a dust filtering plate fixedly installed in the annular groove, wherein a plurality of dust filtering holes are distributed in the dust filtering plate in an array mode; a sealing plate, of which the edge is in sliding and sealing connection with the side wall of the dust filtering plate; a liquid storage cavity formed in the upper part of the shell and internally filled with a cleaning agent; a water absorption ring fixedly connected to the inner bottom surface of the liquid storage cavity; a plurality of water absorption strips with upper ends penetrating through the shell and fixedly connected with the water absorption ring and lower ends fixedly connected with the upper end of the sealing plate; and a deformation mechanism which is arranged among the plurality of waterabsorption strips and comprises the following components as the specification. Dynamic adjustment of the dust filter can be achieved according to the air inflow, so that the utilization rate of the dust filter can be greatly increased and the dust adsorption effect is improved.

The invention provides a filtering device for a coating. The filtering device comprises a filter body and a filter cover, wherein the filter body comprises a main shaft, filtering modules and filter screens; the filtering modules are concentrically arranged in the filter body; the interior of each filtering module is provided with a matching filter screen; each filtering screen is uniformly provided with a plurality of through holes; the upper end of the filter body is provided with a feeding inlet which is communicated with the inner chamber of the filter body; the feeding inlet is connected with a stirrer connecting pipe through a valve; and the lower end of the filter body is provided with a discharge outlet and an electric heating pipe which is communicated with the interlayer of the filter body. The filtering device provided by the invention rapidly moves under the driving of spiral blades and clean materials on the inner wall of the filter body at any time through filtering via the filter screens and rotation of scraper blades under the driving of a wall scraping unit, so the materials are substantially prevented from adhering to the wall and the efficiency and quality of filtering are improved; the filtering device is heated through the heating pipe, so the coating can be kept at a high temperature, and is not easy to form large caked blocks; and filtering is carried out in virtue of the filter screens, so filtering effect can be effectively improved, and blockage hardly occurs.

The invention relates to a spinning die head for a spinning box, which comprises: a pair of die heads with symmetrical structures, wherein a melt inlet is provided at the central upper end of the inner wall of one die head body, and on the inner wall of each die head body And on both sides of the melt inlet, there are multi-stage conveying troughs that are suitable for communicating with the melt inlet during use. The lower end of the outlet at both ends of the final conveying trough is provided with a filter screen, a distribution plate and a spinneret in turn. The inner wall of the die body is provided with a multi-stage conveying trough for conveying the melt, which has the advantages of convenient processing and installation, and is not easy to be blocked; even if a blockage occurs, it can be cleaned and dredged as long as the pair of die bodies are disassembled. It is not easy to scrap the die due to clogging; the processing size of the conveying groove is easy to control, the processing precision is high, and the distribution of each stage is divided into two, and the outlet is evenly distributed, which can ensure the uniform discharge of the melt.

The invention discloses a hydrogen liquefaction device. The hydrogen liquefaction device comprises a first compressor unit, a purifying device, a first cold box, a second cold box, a throttle expansion valve, a liquid hydrogen storage tank, a liquid nitrogen pre-cooling device, a second compressor unit and a third compressor unit, and the liquid nitrogen pre-cooling device provides the cold quantity for the first cold box. The hydrogen liquefaction device can recycle gasified low-temperature gaseous hydrogen in the liquid hydrogen storage tank, safety hidden dangers and energy waste caused bydirect releasing of the low-temperature gaseous hydrogen can be avoided, the cold quantity can further be provided for hydrogen liquefaction, energy consumption for hydrogen liquefaction is reduced, and the cost is reduced; and in addition, high-purity liquid hydrogen with the parahydrogen concentration in the liquid hydrogen being not less than 98% can be prepared through the hydrogen liquefaction device, the orthohydrogen concentration subjected to orthohydrogen and parahydrogen inversion spontaneously in the liquid hydrogen is effectively decreased, the liquid hydrogen evaporation loss is small, all gas and liquid channels and pipelines in the hydrogen liquefaction device are not liable to be blocked, and potential safety hazards are reduced.