41results about How to "Uniform ventilation" patented technology

The invention discloses a hydroponic system for high-throughput maize roots. The hydroponic system comprises a cylindrical sponge, a culture plate, a culture plate round hole, a hydroponic tank, a main ventilating tube and a branch ventilating tube, wherein the cylindrical sponge is used for clamping a maize seedling and then plugged into the culture plate round hole in the culture plate, and the culture plate is horizontally located on the hydroponic tank filled with a nutrient solution; the branch ventilating tube comprises an L-shaped glass tube body, a rubber tube body and a needle head; the needle head is stuck in the main ventilating tube, one end of the main ventilating tube is connected onto an air compressor, the other end of the main ventilating tube is knotted to achieve a sealed effect, and the air output amount of the air compressor is adjusted. The hydroponic system solves the problems that research of soil culture or sand culture of maize roots is difficult, maize seedlings in general hydroponic systems are not firmly fixed and are prone to falling or lodging, the seedlings cultured in general hydroponic systems are few and cannot be applied to large-scale root research, the number of oxygen supply devices in general hydroponic systems is large, and the oxygen supply amount in general hydroponic systems is uneven.

The purpose of the present invention is to provide a fabric in which, when the fabric is made into a bag body, mesh opening at high-temperatures at the boundary portion between the expansion section and the non-expansion section is minimized. This fabric comprises a thermoplastic fiber, a substance having a molecular structure including an aromatic group being present on the fiber surface at an amount of 10 to 2000 ppm with respect to the weight of the fiber.

The invention discloses a formula of a camellia oleifera planting substrate. The camellia oleifera planting substrate is prepared from, by weight, 40-60 parts of peat, 10-20 parts of perlite, 5-10 parts of vermiculite, 5-15 parts of river sand, 5-15 parts of rice hulls, 5-15 parts of loess, 3-5 parts of a nutrient medium, 2-5 parts of auxiliary ingredients and 2-5 parts of a bactericide. The formula of the camellia oleifera planting substrate has the advantages that various beneficial microbial populations catalyzing and decomposing acid can be produced, the camellia oleifera planting substrate is an optimum biological bacterium fertilizer, it is ensured that nitrogen phosphorus and potassium deficiency and fertilizer deficiency phenomena never occur in the whole growing period of camelliaoleifera seedlings, the growth of crops is promoted, the stress resistance, disease resistance, drought and waterlogging resistance, low temperature resistance and lodging resistance of the crops areenhanced, the air permeability and moisture retention effect are significant, the substrate ingredients have no pollution, the content of organic matter is rich, the growth environment of the movement of microorganisms is facilitated, harmful bacteria in the substrate can be eliminated reasonably, the healthy growth of seeds is ensured, the requirements of the crops for organic elements are met well, the healthy growth of the camellia oleifera seedling crops is ensured, and a suitable growth hotbed is provided for the crops.

The invention discloses a gas purification type reagent cabinet capable of adjusting air distribution by sensing, comprising a gas purification part and a reagent placing part, wherein the gas purification part comprises a negative pressure air fan, an air outlet arranged above the negative pressure air fan, and an air inlet arranged below the negative pressure air fan, the reagent placing part comprises a rear wall, a front door, and a plurality of reagent placing platforms located between the rear wall and the front door, the rear wall is provided with an air distribution channel, the reagent placing platforms divide the reagent placing part into a plurality of unit layers, each unit layer is provided with an air distribution opening communicated with the air distribution channel, an optoelectronic switch and a solenoid valve, each optoelectronic switch is arranged on the rear wall and is toward the front door, the solenoid valves are arranged at the air distribution opening, when one optoelectronic switch senses a reagent, the corresponding solenoid valve is controlled to be opened, and otherwise the corresponding solenoid valve is closed. By adopting the gas purification type reagent cabinet, the air distribution condition can be adjusted according to placing positions of drugs in the reagent cabinet.

The invention provides a supporting device and a supporting method for a solid rocket engine end face combustion grain, and belongs to the technical field of solid rocket engine manufacturing. The supporting device specifically comprises a combustion chamber and the grain connected in the combustion chamber, and a supporting piece is arranged between the outer surface of the grain and the inner surface of the combustion chamber and comprises a bottom supporting plate and a side supporting plate, wherein the bottom supporting plate is arranged at the head of the grain, the side supporting plateis arranged on the outer side face of the grain, and the bottom supporting plate is not connected with the side supporting plate. By utilization of the supporting device for the solid rocket engine end face combustion grain, integrity of the grain and safety during solid rocket engine running can be guaranteed, meanwhile, the buffering and stress releasing functions are achieved for the grain surface, and the stress situation of the grain can be well improved.

The invention relates to the technical field of calcination of materials of lime, calcined dolomite and bauxite and the like, in particular to a multipoint cooling heat exchanger, comprising an exchanger shell, a fan and an air duct; the bottom of the exchanger shell is provided with a ring-shaped main pipe connected with the air duct; a plurality of air outlets are arranged at the periphery and the center of the ring-shaped main pipe; the upper parts of the air outlets are provided with a fork flow-guiding device; the number of the air outlets is 3 to 8, namely 2 to 6 air outlets are uniformly arranged at the periphery of the ring-shaped main pipe and 1 to 3 air outlets are respectively arranged at the center of the ring-shaped main pipe; and the number of the air outlets is 5, namely four air outlets are uniformly arranged at the periphery of the ring-shaped main pipe and one air outlet is arranged at the center of the ring-shaped main pipe. The over flow air on the section, which is vertical to the conveying direction of materials, and of the space filled with materials of the whole heat exchanger, is distributed evenly and the average height of material columns is relatively reduced. The air and the high-temperature materials realize uniform heat exchanging, thus improving the heat exchanging efficiency and achieving the object of saving energy and reducing consumption.

The invention belongs to the technical field of environment-friendly equipment, and particularly relates to a novel aerobic continuous closed type drum reactor. The novel aerobic continuous closed type drum reactor consists of a reactor part and a water bath heating part, and is characterized in that the reactor part consists of a feeding hopper, a discharging hopper, a reactor and an aeration screw; the reactor is a hollow drum; the feeding hopper and the discharging hopper are respectively arranged at the two ends of the reactor; the water bath heating part consists of a solar water heating device, and a water bath shell which is arranged outside the reactor in a sleeving manner; a water bath jacket is arranged between the water bath shell and the reactor; a temperature detecting device is arranged in the water bath jacket. According to the novel aerobic continuous closed type drum reactor, an aeration pipe and a stirrer are perfectly combined together; aeration is realized while stirring; the overall structure of equipment is more compact; materials are not easily caked in a reacting process; the reaction efficiency is higher.

The invention relates to the technical field of spray purification of UV paint and plastic paint and discloses a spray purification capture tower of UV paint and plastic paint. The spray purificationcapture tower comprises a tower cover. Ring frames arranged at equal intervals are fixedly connected between the inner side walls of the tower cover. Connection racks arranged at equal intervals are fixedly connected between the inner rings of the ring frames. S-shaped partition plates are installed at equal intervals between the bottoms of the multiple connection racks. The inner side wall in left or right of the tower cover is fixedly provided with three sets of fixed sleeves arranged at equal intervals. Each set of the fixed sleeves comprises two fixed sleeves. Circular tubes are fixedly connected between each set of the fixed sleeves. The outer surface of the circular tube is provided with a spraying mechanism in a ring. The bottom of the tower cover is provided with a through cavity.The existing UV paint production waste gas collection and treatment device has no obvious purification effect, low work efficiency and a low resource utilization rate. The spray purification capture tower achieves good treatment and purification effects and high work efficiency and saves water.

The invention discloses a solid fermenting process. The solid fermenting process comprises the following steps: sterilizing a material, then inoculating probiotics culture, multiplying a great number of microorganisms under a condition with appropriate temperature and moisture, generating various metabolism products, wherein the produced product can be used as a micro-ecological preparation for feed. Meanwhile, the invention also discloses an apparatus used in the solid fermenting process. The apparatus used in the process has an automatic control function, can be started by virtue of one key, can realize automatic stirring, automatic temperature control and automatic oxygen supply, does not need to be guarded by a specially-assigned person, so that the manpower and material resources can be saved; and by utilizing the process, the fermenting time is short, the product is rich in various probiotics cultures and metabolism products which can be used as the micro-ecological preparation in the feed, and can also be used for other relevant purposes.

The invention discloses an efficient refining device. The device comprises a base and a graphite crucible and is characterized in that the bottom of the graphite crucible is mounted in a mounting groove, the inner wall of the graphite crucible is arranged to be of a hollow cylinder structure, an air guide device is arranged on the inner side of the bottom of the graphite crucible, the top end of the graphite crucible is detachably provided with a crucible cover, and a graphite rotor is arranged in the graphite crucible vertically. The device is simple in structure and convenient to use, a gasdispersion disc is arranged in the air guide device to cooperate with diffusion type ventilation bricks, ventilation is uniform, the gas flow can be effectively dispersed, gas and liquid make sufficient contact, the graphite rotor is arranged in the graphite crucible, molten aluminum and gas make sufficient contact, the refining effect is improved, the refining time can be effectively reduced, product comprehensive performance can be improved, a filter net is arranged at the bottom of the graphite rotor, the phenomenon that oxide inclusions on the surface of the molten aluminum is manually cleaned by persons can be effectively avoided, and work efficiency is greatly improved.

The invention discloses a microwave feed port structure based on a wood medium. The microwave feed port structure comprises a heating cavity, four same microwave feed port waveguides, a hot air inlet apparatus, a hot air outlet apparatus and a temperature measurement apparatus, wherein each microwave feed port waveguide adopts a shrink shape; the four same microwave feed port waveguides are connected with the side walls of the heating cavity in a up and down, left and right way; the four same microwave feed port waveguides are used for uniformly feeding microwave energy to the periphery of the heating cavity; the hot air inlet apparatus is connected to one end of the heating cavity while the hot air outlet apparatus is connected to the other end of the heating cavity; and the temperature measurement apparatus is arranged on the heating cavity. By adoption of the microwave feed port structure, the field strength of the wood in the heating process is reinforced while the uniformity of the microwave field strength on each surface of the wood is enhanced, and generation of surface attachment on the microwave shrink feed port structure is reduced, so that a sparking condition in the feed port is further reduced.

The present invention discloses a roof ventilation device and method. The technical project is: a base, a revolving body, a fan blade (2); also a regulating mechanism of ventilation quantity, the rotary slice situated in a rotating body to rotating joint with the revolving body; the bottom of the rotating joint has a projecting thing for fixing in the rotating body, the top of the rotating flaking has a finite bit-slice for fixing in the rotating body. The center part of the fan blade (2) is projecting onwards with the shape of circular arc, or polygonal-shape, circular arc segment adding straight line segment; the external side peripheral middle part of the fan blade (2) projecting outward with the shape of circular arc, or fold line shape, or circular arc segment adding straight line segment. The dispose position spacing of the fan blade (2) is equal, the direction of tile being identical, and the angle of slope (a) being identical. The present invention possesses the beneficial effects: the air exhausting can be start effectively when having weak natural wind; larger ventilation quantity can be provided when being normal wind force; the pneumatic effect of proportional control can be reached with appropriate ventilation quantity when having great wind force.

The invention discloses a drying device and process for textile yarn after dyeing. The drying device comprises a drying box and a heating device. The heating device is used for injecting hot air into the drying box; the interior of the drying box is divided into a plurality of cavities for placing textile yarns by a plurality of partition plates; the drying box is internally provided with an airflow distribution device used for evenly distributing hot airflow injected by the heating device to the cavities. The device further comprises a conveying line used for conveying textile yarn into and out of the drying box. According to the post-dyeing drying device and process for the textile yarns, the layout in the drying box is reasonably designed, the ventilation of all parts in the drying box can be uniform, all the textile yarns in the drying box can be synchronously dried, the textile yarns can be conveyed into and out of the drying box in batches through the conveying line, and automatic drying is achieved.

The invention belongs to the field of helicopter process equipment design, and particularly relates to a helicopter box body part welding positioning device with a ventilation protection function. The welding positioning device takes a positioning core block with a vent groove structure as a positioning main body structure, and the positioning core block is mounted on a positioning bottom plate and is detachable; a connecting gas nozzle connected with protective gas is arranged on the positioning bottom plate, and the protective gas is directly led into the vent groove of the positioning core block; a copper pad is installed in a vent groove in the positioning core block, vent holes are distributed in the copper pad at certain intervals, and protective gas is discharged to a weld joint through the vent holes and plays a role in ventilation protection when the box body piece is welded. The problem that the traditional welding process is poor in appearance positioning and protective gas collaboration is effectively avoided; and the whole positioning structure is detachable in block, so that the welded part can be conveniently taken out of the positioning device.