255results about How to "Technically reasonable" patented technology

The invention relates to a shed-frame method for shallowly burying a large-sized underground structure construction. A construction principle is as follows: an envelope enclosure is adopted for retaining soil and water and resisting lateral deformation; a large-diameter pipe shed is arranged to bear the load of road surfaces and stratums and protecting underground pipelines; strip foundation construction of a center pillar in a main structure is carried out in a small pilot tunnel which is excavated with a subsurface excavation method; and under the protection of a top pipe shed frame, main structure construction is carried out with a cover-and-excavation half-top-town half-bottom-up method, and the center pillar, side walls, a center plate and a top plate which are pre-constructed well are utilized for providing vertical and horizontal support systems in an excavation space. The invention aims at providing a new method for shallowly burying the large-sized underground structure construction under an urban road; and the method is reasonable and feasible in technique and strong in operability, the quality of the main structure is guaranteed easily, construction is safe and rapid, the influences on ground transportation and the dismantlement and change to underground pipelines are reduced, and the comprehensive benefits are remarkable, therefore the shed-frame method has an important engineering application value and development prospect.

The invention discloses a preparation method for recovering high-purity yttrium europium from fluorescent powder scrap, comprising the following steps: 1) dissolving fluorescent powder; 2) carrying out filter pressing on dissolved feed liquid to obtain rough europium by a plate frame; 3) removing zinc and iron from feed liquid rich with yttrium and zinc by N235; 4) putting YCL3 into HB extracting agent for secondary edulcoration to obtain fluorescent-grade 4N-5N YCL3, dewatering, carbonizing and oxidizing; 5) putting prepared rough EU and HA-extracted rough EU into a reaction vessel, and slowly adding zinc power in batches; 6) after reducing, adjusting pH value by ammonium chloride and ammonia water in place to prepare europium hydroxide; 7) preparing a europium hydroxide solution with certain concentration and pH value, transmitting to an HB agent system for reaction; 8) firing after washing; and 9) dewatering, carbonizing and oxidizing for 3-5 hours at the high temperature of about 1000 DEG C to obtain fluorescent-grade europium oxide, smashing, screening and packaging in vacuum. The invention has the advantages of reasonable technology, strong maneuverability and strong competitiveness.

The invention provides a method for extracting and preparing corosolic acid from plants, which comprises the steps of poaching and removing water-soluble substances, extracting basic organic solvents of total triterpene acids and enriching and purifying macroporous absorption resin of corosolic acid. Plants containing corosolic acid are adopted as raw material and the water-soluble substances are removed after boiled by pure water; regarding filter residue 30 to 60 percent of basic ethanol or methanol water solution is adopted to extract total triterpene acids and go through settling separation under the condition that pH is 4.5 to 7.5 to obtain crude products of total triterpene acids which are fully dissolved by 85 to 100 percent of ethanol or methanol and undissolved substances are removed; filtered liquor goes through the absorption and elution of macroporous absorption resin; the final concentration of ethanol or methanol in the elution liquor of corosolic acid is adjusted to be less than or equal to 50 percent and pH value thereof is adjusted to be less than or equal to 7.0; corosolic acid is obtained through settling separation under the condition. The method has simple preparation technique, high separation and purification efficiency, easy industrial production, low production cost and relatively great generalization.

The present invention provides a method of separating and preparing corosolic acid from loquat leaves, which includes the separation and preparation of the total triterpene acid loquat leaf, the purification of the resin concentration of the corosolic acid, the crystallization and purification of the corosolic acid, etc. In the preparation method, the loquat leaves are used as a material, and the total triterpene acid loquat leaf is extracted by applying the aqueous solution of the hydrophilic organic solvent; under the alkaline condition and before cooling, impurities are removed by filtration, and activated carbon is decolored; extracting solution applies macroporous absorptive resin concentration to purify the corosolic acid, and the crude corosolic acid is further crystallized and recrystallized by applying the hydrophilic organic solvent, so that the high-purity corosolic acid crystal is prepared. By measurement, the purity of the white corosolic acid crystal is larger than or equal to ninety eight percent. The preparation technique of the present invention has the advantages of simple technique, high efficiency of separation and purification, easy industrialized production, high purity of the prepared corosolic acid and low production cost, and moreover, the preparation technique of the present invention has the advantages of high efficiency, high availability, long effect, little dosage, little toxicity, little side effect, convenient storage, convenient carrying and convenient administration, etc. of the modern Chinese medicine.

The invention provides a separation method of the geniposide, including: extracting the geniposide from the Gardenia to produce a concrete with a hydrophilic organic water solution; removing the gardenia yellow pigment of the concrete by a large-hole adsorbed resin; depressed recovery of the solvent of the transudate, and concentrating to a coarse geniposide in vacuum; fully extracting the coarse product by hot ethylhexoate, cryogenic treatment of the extract, getting the geniposide crystal; crystallizing the ethylhexoate and acetone solvent and removing the impurities in room temperature; an obtaining the geniposide crystal with a purity >=98%. The invention separates the highly purified geniposide crystal. It has a cheap material, an easy and effective preparation craft, a broad extension and a novel design.

The invention discloses a suction and release device for thin micro parts, which comprises a suction cylinder, a negative pressure pump is arranged at the top of the suction cylinder, a suction and release panel is arranged at the bottom of the suction cylinder, and several Suction hole, the suction hole is connected to the suction cylinder, and the suction and release panel is concave and has an arc surface structure. This device can not only freely suck and release thin and tiny parts, but also accurately position the sucked and released thin and tiny parts, so that It can accurately pick up and place thin and tiny parts during operation, which greatly reduces equipment failures caused by inaccurate placement of parts, improves the accuracy of equipment assembly, and thus greatly improves the use efficiency of the equipment; in addition, the suction at the bottom of the suction cylinder There are several suction holes on the placement panel, so that the suction cylinder can absorb thin and tiny parts of different structures, and a clamping device is added on the suction cylinder. The clamping device cooperates with the suction cylinder and can also clamp the suction cylinder with insufficient suction. Thin and tiny parts.

The invention discloses a preparing method and application of lotus leaf flavone and lotus leaf alkaloid, which comprises the following steps: adopting rough-extract of lotus leaf, film separating impurity-removing lotus leaf extract or resin separating purifying lotus leaf extract as raw material; adding water to stir into suspension; adsorbing lotus leaf flavone through polyamide; decompressing non-adorbed part to recycle; condensing solvent into lotus leaf alkaloid in the vacuum; washing lotus leaf flavone on the polyamide; removing polar impurity and pigment; eluting through polar organic solvent; decompressing eluent; recycling solvent; condensing into lotus leaf flavone in the vacuum; fitting for prepare fat-reducing, antihyperglycemic, antiviral or oxidation resistance oral agent.

The invention discloses a preparation method of a 42CrMo steel casting rolling forming ring member sample for EBSD (electron back-scattered diffraction) testing and belongs to the technical field of ring member forming process electron microscope sample preparation. The preparation method is characterized by including following steps: (1), cutting sample units Q: cutting sample units Q1, Q2 and Q3 with length c=5-8mm, width k=3-4mm and height h=2-3mm at different positions along a radial wall thickness direction in a middle section in the height direction of a 42CrMo steel casting rolling forming ring member; (2), grinding: grinding the sample on an automatic grinder until glossiness of the surface is 12-13 grade; (3), ultrasonically cleaning; (4), preparing electrolysis polishing liquid; (5), electrolytically polishing: adopting self-made electrolysis polishing equipment to conduct a polishing experiment, wherein voltage is 25-30V, current is 0.6-0.8mA and time is 50-60s; (6), cleaning: sequentially putting 4-5 beakers containing a certain amount of anhydrous alcohol; (7), pre-observing: observing a slightly-corroded indistinctly-visible crystal boundary on the surface of the sample under a metalloscope. The preparation method is simple and low in investment, and the sample prepared by the method can be used for EBSD observation under a scanning electron microscope to obtain clear crystal boundary orientated images.

The invention relates to an agricultural breeding technology and especially relates to a Xinjiang Jun date industrial-seedling virus-free tissue culture rapid-propagation technology. The Xinjiang Jun date virus-free tissue culture rapid-propagation technology mainly comprises the following steps of 1, Jun date tree stem explant rapid-starting, 2, Jun date shoot tip virus-free culture, 3, Jun date virus-free tissue culture seedling propagation and 4, Jun date virus-free tissue culture seedling rooting culture. The Xinjiang Jun date industrial-seedling virus-free tissue culture rapid-propagation technology has a reasonable technology, can be operated simply, is suitable for industrial seedling growing, greatly improves a survival rate, effectively prevents jujube witches' broom disease and is economic and practical.

The invention discloses a pretreatment method of high-concentration cutting fluid sewage. The pretreatment method comprises the following steps: high-concentration cutting fluid sewage is inputted into a demulsification tank, a chemical oxidation pond, a flocculation basin and an air flotation tank so as to respectively carry out demulsification, chemical oxidation, flocculation, air flotation and the like; scum and bottom sludge which are discharged out of each treating pond are all connected into a nearby sludge collection tank by a self-flowing mode; and clean water flows into a clean water area of the air flotation tank from the outer periphery of an internal cylinder of the air flotation tank, and the clean water is injected through a clean water pipe into a clean water basin to be stored for the next regular treatment. In the air flotation tank, spiral-flow water distribution and dissolved air flotation technologies are combined, equipment is simplified, and the conventional air flotation treatment effect is improved. After high-concentration cutting fluid sewage is treated by the method, effluent COD can be reduced below 800 mg / L, thus satisfying inflow conditions of secondary sewage treatment. Thus, the method provided by the invention has characteristics of simplified equipment, reasonable technology and good treatment effect, and is very suitable for chemical pretreatment of metal working high-concentration cutting fluid sewage.

A process for preparing the extract from capejasmine fruit by use of macroreticular adsorption resin includes such steps as extracting in hydrophilic solvent to obtain coarse extract, membrane separation for removing impurities, adding water to become suspension, adsorbing by macroreticular resin, water washing for removing polar impurities, eluting with the aqueous solution of hydrophilic solvent, vacuum recovery of solvent, and vacuum concentrating.

The invention discloses a purple yam beverage and a preparation method thereof. The purple yam beverage is obtained through the following steps: pretreating raw materials namely fresh purple yam, performing color protection, mashing the purple yam after color protection, extracting anthocyan assisted by ultrasonic waves, pressing and heating the purple yam without the anthocyan, treating the heated purple yam under a static state and extra-high pressure for preparing resistant starch, compounding the resistant starch and the anthocyan so as to obtain a mixture, homogenizing the compounded mixture with nanometer, filling the homogenized mixture, and sterilizing the filled mixture at high pressure so as to obtain the purple yam beverage. According to the purple yam beverage and the preparation method thereof disclosed by the invention, after the anthocyan and the starch in the purple yam are separated, the starch is prepared into the resistant starch, and then the anthocyan and the resistant starch are added step by step and are prepared, so that physiological functions of the anthocyan and the resistant starch can be fully utilized; besides, a nanometer homogenizing technology is utilized, so that the particle size of the resistant starch is decreased, and the stability and the mouth feel of products are improved; the prepared purple yam beverage is good in color and stability, is fine and smooth in mouth feel, has the efficacies of resisting cancer, resisting oxidation and the like, is low in heat, is suitable for obesity crowds to drink, is high in added value of products and is good in market prospects.

The invention relates to an integrated technique and special equipment for raw gas waste heat recovery and steam replacement with heat transfer soil. The integrated technique and the special equipment are mainly characterized in that high-temperature separation heat pipes are used to recover latent heat of high-temperature raw gas from a coking chamber, the recovered heat is transmitted to heat transfer oil, the heated transfer oil supplies required heat to various coking procedures of chemical production operational units (an ammonia evaporation procedure, crude benzene distillation and refining procedures, a coke distillation procedure), the heat transfer oil in a whole chemical production system cycles in closed loops, and temperature and flow are regulated and controlled according different requirements of the units on operational heat sources. Compared with the prior art, the integrated technique and the special equipment can be used for efficiently recovering high-quality waste heat of raw coke oven gas, energy consumption of the coking procedure is reduced, consumption of circulating ammonia water in spraying is reduced, heat transfer oil heating systems for the chemical production operational units and addition heat required by the heat transfer oil heating systems are omitted, and closed-loop circulation of the heat transfer soil and cascade use of the waste heat are achieved.

The invention relates to four loading / unloading techniques of container, wherein it can save package cost, loading cost and leakage loss, as save 30billon yuan each year for outer nation; it can improve the labor condition and improve work efficiency, it seals the rice, without pollution; and it realizes transfer transmission, reduces the loading / unloading operation; and the invention has low cost and simple structure.

Disclosed are a tapered wedge type adjustable device for a foundation pit engineering inner support and a construction method. The device clamps tapered legs through two clamping plates to bear and transmit steel support shaft force under the action of a plurality of rows of high-strength bolts, 30-degree included angles are formed among the contacting surfaces of the clamping plates and the tapered legs, vertical positioning is determined by adjusting the high-strength bolts, the bolts are tightened, so that the shaft force can be born, the clamping plates of the tapered wedge type adjustable device contract with the tapered legs in a smooth surface manner, the high-strength bolts penetrate bolt grooves of the tapered legs and are fixed on the clamping plates of two sides, steel support shaft pressure can be effectively born, the drawing force generated by outward deformation of a soil layer can be born, and the integrality of enclosing purlins and steel supports is improved. The device changes a traditional idea that the adjustable device is driven into a steel wedge, the contacting surfaces are enlarged, a tapered wedge is tighter in pressed by the aid of the opposite-pull action of the high-strength bolts, the integrality of a foundation pit support system is ensured, and the falling risk of the steel supports is reduced.

The invention specifically relates to a method for synthesizing a silicate building material from magnesium oxide and blast furnace slag, belonging to the field of recycling of industrial waste residues. The method adopts a hydrothermal curing process, and a cured product has high mechanical strength and can be used as a wall material of a building, a brick for a pedestrian trail, etc. The method comprises the following steps: subjecting magnesium slag tailings to crushing, screening and roasting; then uniformly mixing the roasted tailings with a proper amount of blast furnace slag powder and water and carrying out compression molding; and allowing calcium silicate hydrate and chrysotile calcium silicate hydrate to be formed and aggregated in virtue of the slag activation effect of MgO in a high-temperature saturated water vapor environment so as to obtain the building material with usage performance like high mechanical strength. The prepared building material is applicable as a wall material of a building, a brick for a pedestrian trail, etc.; and the method is applicable to recycling of magnesium-containing mine tailings like low-grade magnesite, dolomite and brucite and residues of boric sludge and the like.

The present invention discloses a preparation method of an aromatic polyamic acid with characteristics of high relative molecular mass and narrow molecular weight distribution. According to the preparation method, a low molecule prepolymer solution of an aromatic polyamic acid and an aromatic diacid anhydride solution are concurrently conveyed into a co-rotating twin-screw mixing extruder so as to be subjected to an equal equivalence synthesis reaction, wherein an aromatic dianhydride and an aromatic diamine react in a strongly-polar non-protonic organic solvent according to a molar ratio of 0.90-0.98:1 to prepare the low molecule prepolymer solution of the aromatic polyamic acid. With the method of the present invention, the polyamic acid resin with the characteristics of high relative molecular mass and narrow molecular weight distribution can be obtained so as to obtain the high-quality polyimide film.

The invention discloses a water-cooled die casting mold for manufacturing an aluminum alloy wheel hub. The water-cooled die casting mold comprises a top die, four side dies and a bottom die, wherein the four side dies are in symmetric structures and are matched with the top die and the bottom die; the bottom die is arranged below the top die and is matched with the bottoms of the side dies; an upper square desk board is fixed above the top die; positioning columns are arranged at four corner ends of the upper desk board; an upper top plate and a lower top plate are assembled above the upper desk board through positioning columns; the upper top plate is fixedly connected with the lower top plate; a die base plate is fixed below the bottom die; a channel for assembling a ceramic runner is arranged at the center of the die base plate; an annular cavity is formed by the upper part of the die base plate and the lower surface of the bottom die. The technical scheme disclosed by the invention has the beneficial effects that by applying a water cooling process, quick cooling of blanks can be realized, and the production efficiency is improved; in addition, by means of multiple cooling modes and matching with the cooling of the top die and the side dies, the aim of quick cooling is commonly realized, and the effects that energy consumption is reduced by 10 percent, noise pollution is reduced by 90 percent, and the production efficiency is improved by 30 percent are finally realized.

A cable rope maintaining robot is hung on a cable rope and comprises a robot framework, four climbing mechanisms and a climbing control mechanism, wherein the cable rope is movably sleeved with the robot framework, and the four climbing mechanisms and the climbing control mechanism are arranged inside the robot framework. The four climbing mechanisms are symmetrically distributed around the cable rope in pairs and can clamp the cable rope in pairs in an alternate mode. The climbing control mechanism controls the four climbing mechanisms to climb along the cable rope in pairs in an alternate mode, and therefore the whole cable rope maintaining robot is driven to move along the cable rope. The four climbing mechanisms are symmetrically arranged in pairs and climb in pairs in the alternate mode, the four climbing mechanisms can climb on the cable rope with the standard cylindrical surface and can be suitable for cable ropes with concave surfaces in various shapes such as the cylindrical shape and the non-standard cylindrical shape as well. Clamping legs step and advance in pairs so that the advancing process of climbing of the cable rope maintaining robot can be completed, and the technology is more advanced, more reasonable and simpler.

The invention discloses an uncoiling blanking die with a side discharging mechanism and a blanking method. The uncoiling blanking die comprises a die body (2) and the side discharging mechanism, wherein the side discharging mechanism comprises a guide rail (5), a tray (6) and a tray driving device (7); the guide rail (5) is arranged on the die body (2); the tray (6) slides in a groove of the guide rail (5); the tray (6) and the guide rail (5) form a sliding pair; the tray driving device (7) is used for driving the tray (6) to move. According to the uncoiling blanking die, by a one-discharging-two side discharging structure, the requirements of a production process are met; a mode of moving the whole stack in a die cavity of the die from the side is implemented, so that influence on the beat of an uncoiling blanking line is avoided, the production efficiency is improved, a function of the uncoiling blanking line is expanded, and the equipment utilization rate is increased; the uncoiling blanking die and the blanking method have feasible technicality and reasonable economy.

The invention discloses an expansive soil embankment structure improved and reinforced by a sandwich method and a construction method. The structure comprises a subgrade bed surface layer, a subgrade bed bottom layer and a subgrade body in sequence from top to bottom, wherein the subgrade body is composed of an expansive soil filling region and an improved soil filling region which are distributed at interval; anti-running slipping grids are arranged on side slopes at two sides of the subgrade body; transverse water drainage slopes are arranged at the bottoms of the subgrade bed surface layer and the subgrade bed bottom layer, and the bottom of the expansive soil filling region in the subgrade body; an inclined water discharge hole is buried in the transverse water drainage slope of the expansive soil filling region; a reversed filtering layer is arranged at the periphery of the inclined water discharge hole. According to the expansive soil embankment structure disclosed by the invention, a technical problem that expansive soil cannot be used for carrying out embankment filling is solved, and the quality meets the requirements after embankment filling construction of an expansive soil region is carried out; the improvement cost can be greatly reduced, and a flow of a construction process is simplified; large-scale construction and continuous filling are convenient to carry out, and the aims of reasonable technology and reduced cost are realized; the expansive soil embankment structure has a wide popularization and application value.

The invention relates to a cutting bed structure of a ballast-less rail type high-speed railway in a seasonal frozen-earth area, so as to effectively control the water content of filled earth within the bed range not to exceed the initial frost heaving water content to prevent frost heaving deformation from the source, so that the cutting bed structure satisfies the control requirement of the ballast-less rail type high-speed railway on the bed structure deformation, and the high smoothness, stability and durability of a rail structure are guaranteed. A cutting bed comprises a composite waterproof drainage layer, a lower bed bottom layer, a drainage type upper bed bottom layer, a drainage type bed surface layer and a bed surface waterproof layer, wherein the composite waterproof drainage layer, the lower bed bottom layer, the drainage type upper bed bottom layer, the drainage type bed surface layer and the bed surface waterproof layer are laid or filled on an original foundation earth layer on the bottom surface of a bed replacing layer in sequence from bottom to top; drainage constructions are formed on both sides of the cutting bed, and the level of the drainage surface of a drainage structure on the lower part of each drainage construction is lower than that of the lower bottom surface of the composite waterproof drainage layer; and the designed frozen depth of the cutting bed begins from the upper surface of the bed surface waterproof layer to the upper surface of the lower bed bottom layer.

The invention relates to a fabric softness testing device. The testing device comprises a supporting mechanism for smoothly supporting a fabric, a testing mechanism for performing a softness test on the fabric on the supporting mechanism, the supporting mechanism has a first supporting plane and a second supporting plane located on the two sides, a spacing area is formed between the first supporting plane and the second supporting plane, the fabric is mounted on the first supporting plane and the second supporting plane and spans the spacing area, and the testing mechanism can perform abuttingmonitoring on the fabric spanning the spacing area and judge the softness of the fabric; and the fabric softness testing device provided by the invention has the advantages of compact structure, simple and convenient operation, simple manufacture, low production cost, reasonable technology, high practicability, scientific and careful operation process controlled by a control system (using a computer), and clear technical principles.

The invention discloses a construction method for treating an adjacent existing railway line soft soil foundation and a roadbed structure thereof. The construction method comprises the steps of leveling the site, and longitudinally constructing a plurality of rows of rigid CFG piles along the line in the slope toe area of the side, away from an existing railway line, from a safety limit part to a designed newly-built roadbed; longitudinally constructing a plurality of rows of flexible jet grouting piles along the line in the slope toe area of the side, close to the existing railway line, from the safety limit part to the designed newly-built roadbed; longitudinally paving a mattress layer along the railway line above the rigid CFG piles and the flexible jet grouting piles and at the top of a soft soil layer; and paving a roadbed above the mattress layer according to the design. According to the construction method and the roadbed structure, the roadbed bearing capacity is effectively improved, the post-construction settlement of the roadbed is reduced, the stability of the soft soil foundation is guaranteed, and the negative impact to the safe operation of the existing railway line is avoided; and the roadbed reinforcement structure is simple in form, good in stratum adaptability, reasonable in technology, and economic in cost, and has relatively high popularization and application value.

The invention relates to a full-automatic fish cutting machine which comprises a shell with a door, a transmission device fixed inside the shell, and a fish killing device fixed in the middle inside the shell, wherein the transmission device comprises two motors which are respectively fixed at the upper end and the lower end of the shell; the two motors are both connected with rotors; connecting wires are wound on the two rotors so as to form circulation transmission; a plurality of clamping devices are distributed on the connecting wires; the fish killing device comprises cutter nets which are fixed on two opposite inner side walls of the shell and a water spay gun, a scraper cutter and a belly cutter which are sequentially fixed on one inner side wall of two another opposite inner side walls from top to bottom; the connecting wires connected with the plurality of clamping devices penetrate through the cutter nets. The technical scheme of the invention has the beneficial effects that the structure is simple, the technique is reasonable, the operation is simple, the cost is low, and the steps of splitting the bellies, scaling, removing internal organs and washing can be full-automatically completed.

The invention discloses a comprehensive utilization method of industrial waste residue by utilizing a process method of synthesizing a magnesium silicate building material product by utilizing boron mud and coal ashes. The method adopts boron mud and coal ashes as base materials, and comprises roasting and activating of boron mud as well as hydrothermal combination reaction with the coal ashes. The boron mud is firstly roasted and activated under the condition of 600 DEG C-1000 DEG C, then, the roasted boron mud, the coal ashes, a structural development accelerator and water are uniformly mixed in a mass ratio of 1:(0.25-2.50):(0.01-0.10):(0.1-1.0), placed in a sealed container after being mould-pressed and formed under 3 MPa-50 MPa, and reacted for 4-12 hours under the saturated steam condition of 160 DEG C-240 DEG C. The boron mud is roasted and activated, so that a magnesium oxychloride component in the boron mud is decomposed into MgO; meanwhile, impurities such as clay minerals are dehydrated and activated, a roasting furnace is kept well-ventilated, materials quickly get in / get out of a constant-temperature furnace, and roasting and activating time is shortened with temperature rise. The method disclosed by the invention is suitable for converting and curing the boron mud, and is further applicable to recycling other industrial waste containing MgCO3, Mg(OH)2 or MgO, and the like.

A process for preparing the extract from capejasmine fruit by use of membrane separation technique includes such steps as extracting in hydrophilic solvent to obtain coarse extract, adding water to become suspension, and membrane separation for removing protein, polyose and other macromolecular impurities.

The invention discloses a method to advanced treat and recover the industrial sewage, which comprises: taking high-efficiency aerobic circulation biological expansion bed water treatment to the two-stage biochemical treated outlet water with aerobic biological reaction tower as main; leading the sewage into reactor through distribution-water device arranged on tower bottom; taking biochemical treatment with the distribution-gas device and microbe on surface of light biological particle carrier on aerobic bed unit; controlling the rising speed of flow in tower to achieve need expansion state; entering filter pond or pressure filter pond to remove the suspension, and outputting water come up to the advanced treatment request. This invention can satisfy different request for recovery water quality by selecting variable device combination.

The invention discloses a propellant storage box for a spacecraft ground test. The propellant storage box comprises a storage box outer shell, a liquid cavity cylinder body, an anti-revolving and anti-shaking component and a fixed component. One end of the storage box outer shell is opened, the liquid cavity cylinder body is used for storing propellant, and the liquid cavity cylinder body, the anti-revolving and anti-shaking component and the fixed component are arranged inside the storage box outer shell. The upper end of the fixed component is fixed at the position of the opening of the storage box outer shell. The lower end of the fixed component penetrates through the storage box outer shell to be inserted into the liquid cavity cylinder body. An elastic element is transversely arranged at the gap position between the fixed component and the liquid cavity cylinder body. The lower end of the liquid cavity cylinder body is directly fixed with the storage box outer shell. The anti-revolving and anti-shaking component is further arranged at the lower end of the liquid cavity cylinder body. According to the technical scheme, the propellant storage box for the spacecraft ground test has the advantages of being simple in structure, reasonable in technology, light and handy in mass, low in manufacturing cost, capable of adjusting the volume of the injected propellant as needed, quite flexible in use, capable of being suitable for wide-angle shaking, and quite firm in structure.

The invention discloses an automatic edge grinding device for a finished wood floor product. The automatic edge grinding device for the finished wood floor product comprises two grinding units, wherein one grinding unit is located on the lower portion the other grinding unit, the two grinding units are perpendicular to each other, and the lower grinding unit is located at the end of the upper grinding unit; each grinding unit (1) comprises rolling shafts and a conveyor belt which is in wrapped connection with the rolling shafts, each conveyor belt is provided with a first sliding groove, multiple vertical baffles are distributed in the first sliding groove through sliding blocks with servo devices, each baffle is formed by multiple cubes which are connected with one another in a sleeved mode and is telescopic, the two sides of each conveyor belt are provided with two grinding devices which are arranged in a symmetrical structure, supports used for installing the grinding devices are arranged on the two sides of each conveyor belt, a second sliding groove is formed in each support, electric telescopic rods are installed in the second sliding grooves through the sliding blocks with the servo devices, and the grinding devices are installed at the upper ends of the corresponding electric telescopic rods. According to the automatic edge grinding device for the finished wood floor product, use is convenient, the manufacturing cost is low, grinding of rough edges at the four sides of a wood floor can be completed automatically.