181results about How to "Prevent hardening" patented technology

The invention belongs to the field of cement pouring, and particularly relates to cement pouring equipment for cement product production, which comprises a base, a supporting column is fixedly connected to the top of the base, a top plate is fixedly connected to the top of the supporting column, a pouring structure is arranged on the top plate, a through groove is formed in the top plate, and the pouring structure comprises a motor I; a first motor is fixedly connected to the outer wall of the top plate, a threaded rod is fixedly connected to the output end of the first motor, a movable block is in threaded connection to the outer wall of the threaded rod, and a stirring box is fixedly connected to the top of the movable block. According to the cement pouring equipment for cement product production, a bidirectional threaded rod is driven by a third motor to rotate, so that two sets of clamping plates move oppositely, pouring molds of different sizes can be rapidly clamped, then the bidirectional threaded rod rotates reversely through reverse rotation of the third motor, clamping of the pouring molds is conveniently and rapidly relieved, and the production efficiency is improved. The working efficiency is improved, and the stability in the pouring process is ensured.

The invention discloses a specific environmental factor simulation device for grass seed seedling raising, and relates to the technical field of grass seed seedling raising. A specific environmental factor simulation device for grass seed seedling raising comprises a simulation box, a box door is rotationally connected to the simulation box, a seedling raising plate is fixedly connected to the interior of the simulation box, and seedling raising cavities distributed at equal intervals are formed in the seedling raising plate. Grass seeds are sown in seedling raising cavities of the seedling raising trays at equal intervals in a dibble seeding mode, in the seedling raising period, the atomization sprayers slide forwards to water the seedling raising trays, after watering is completed, the atomization sprayers move backwards to be reset to be matched with the contact blocks in an extrusion mode, and then the soil loosening frame is controlled to move front and back to properly loosen surface soil; the soil loosening frame can effectively improve the air permeability of soil and prevent the soil hardening phenomenon caused by watering, so that more favorable growth conditions are created for grass seeds, the height of the soil loosening frame can be adjusted according to the growth condition of grass seedlings by controlling the transverse plate to move up and down through the screw, and the grass seedlings can be prevented from being broken off by the soil loosening frame while the soil loosening depth is adjusted.

The invention discloses an efficient photovoltaic cell panel intelligent cleaning and dust removing device which comprises a mounting frame, a sweeping mechanism, a first driving mechanism and a second driving mechanism. The photovoltaic cell panel is mounted on the mounting frame, and the sweeping mechanism is used for conducting dust removing operation on the surface of the photovoltaic cell panel; the first driving mechanism is used for driving the sweeping mechanism to reciprocate in the length direction of the photovoltaic cell panel, the second driving mechanism is used for driving the sweeping mechanism to rotate, and through the arrangement of the first driving mechanism and the second driving mechanism, the function of longitudinal and transverse bidirectional sweeping of the sweeping mechanism on the surface of the photovoltaic cell panel is achieved; therefore, comprehensive and efficient cleaning of the surface of the photovoltaic cell panel is achieved, the problems that traditional dust removal equipment can only conduct cleaning in a single direction and is poor in cleaning effect are effectively solved, the photoelectric conversion rate of the photovoltaic cell panel is remarkably improved, the whole operation of the cleaning mechanism is driven by the same motor, and the cleaning efficiency is improved. And the dust removal energy consumption and the manufacturing cost are effectively reduced.

The utility model provides an intra-articular fracture percutaneous elastic distraction reduction fixing device which is characterized by comprising a sleeve (1) with one end open and the other end sealed, a pressure piston (4) is arranged in the sleeve (1), and a power piston (5) and a power ball (6) which are correspondingly matched are arranged on one side of the pressure piston (4). A plugging device (7) correspondingly matched with the open end of the sleeve (1) is arranged on one side of the power ball (6), a second sleeve (4a) is arranged at the other end of the pressure piston (4), one end of the second sleeve (4a) extends out of the sleeve (1), and the second sleeve (4a) is connected with a first screw (8) correspondingly matched with the second sleeve (4a). The utility model has the advantages of simple structure, convenience in use and simplicity in operation, and can avoid complications such as ankylosis and the like while maintaining fracture reduction.

The invention belongs to the technical field of articles for daily use, and discloses high-softness and high-strength embossed paper for daily use, the paper for daily use comprises a body base layer, a first embossed surface and a second embossed surface, the first embossed surface, the body base layer and the second embossed surface are sequentially connected from top to bottom in the vertical direction, the first embossed surface, the body base layer and the second embossed surface are all arranged in the horizontal direction. And the areas of the first embossed pattern and the second embossed pattern are different. The knurled household paper disclosed by the invention has moisture absorption, softness and strength performance at the same time. Through the design of the linear embossing and the dotted embossing, the porosity and the surface area of the paper are increased, the water absorption capacity is improved, and the paper can rapidly absorb and diffuse liquid.

The invention discloses a power plant solid waste sorting and recycling device, and relates to the technical field of power plant solid waste recycling, the device comprises a crushing box and a sorting box arranged at the lower end of the crushing box, the crushing box is internally provided with a crushing cavity and a transportation cavity in sequence from top to bottom, and the crushing cavity is internally provided with a crushing structure; a smashing cavity and a sorting cavity are sequentially formed in the sorting box from top to bottom, a filtering plate is arranged between the smashing cavity and the sorting cavity, a sorting structure is arranged in the sorting cavity, a discharging opening is formed in the bottom of the right end of the sorting box, a discharging opening is formed in the bottom end of the sorting box, and a second material receiving conveying belt and a first material receiving conveying belt are arranged below the discharging opening and the discharging opening correspondingly. The sorting structure is matched with the scraping plate, the magnetic ring in the sorting structure can adsorb metal impurities on the surface of the magnetic ring, the magnetic ring rotates along with the driven roller, non-metal impurities are separated from the magnetic ring under the action of gravity and continue to rotate along with the driven roller, the scraping plate scrapes the metal impurities on the magnetic ring, and therefore separation of the metal impurities is completed.

The invention discloses a preparation method of an organic silicon soil conditioner and an anti-caking treatment device. The anti-caking treatment device comprises a rack, a roller mechanism, a feeding mechanism, an anti-caking liquid spraying mechanism and an anti-caking agent spraying mechanism. The roller mechanism comprises an outer spiral plate, an inner spiral plate, a sealing plate, an annular plate, a fixed circular plate, an intermittent discharging barrel and a guide arc plate. The feeding mechanism comprises a feeding barrel, a feeding shaft, a spiral blade, a first rotation driving device and a second rotation driving device. The anti-hardening liquid is sprayed to the organic silicon soil conditioner particles through the liquid spraying head, the anti-hardening agent is sprayed to the organic silicon soil conditioner particles through the powder spraying head, and the organic silicon soil conditioner particles move in the inner spiral plate and the outer spiral plate to be discharged. Meanwhile, the anti-hardening liquid and the anti-hardening agent can be more uniformly distributed on the surfaces of organic silicon soil conditioner particles to form double-layer protection; automatic feeding and discharging, automatic anti-plate treatment and automatic discharging of the organic silicon soil conditioner particles can be achieved.

The invention relates to the technical field of soil improvement, and discloses a soil improvement fertilizer and application thereof in saline-alkali soil improvement, a preparation method of the soil improvement fertilizer comprises the following steps: mixing cow dung, chicken manure and straw, and carrying out anaerobic fermentation to obtain an organic fertilizer; mixing soybean, corn and seaweed, performing enzyme catalysis treatment, and extracting to obtain an amino acid liquid fertilizer; soaking brown algae in hot water, filtering and concentrating to obtain a seaweed extract; uniformly mixing silicate minerals, natural gypsum powder, the organic fertilizer, the amino acid liquid fertilizer and the seaweed extract, and sequentially drying and crushing to obtain the soil improvement fertilizer. According to the soil improvement fertilizer disclosed by the invention, various components such as the organic fertilizer, the amino acid liquid fertilizer, the seaweed extract, the silicate minerals and the gypsum powder are meticulously proportioned, so that the soil fertility can be remarkably improved, the soil structure is optimized, the growth of plant root systems is promoted, the stress resistance of plants is enhanced, and the sustainable utilization of soil is improved for a long time.

The utility model relates to the technical field of cables, in particular to a bending-resistant cable, which comprises a sheath and a heat insulation layer, three leads are arranged in the sheath in a penetrating manner, a heat insulation layer is sleeved on the surface of the sheath, the heat insulation layer is a foamed polypropylene layer and positioned in the heat insulation layer, the heat insulation layer is a polyethylene layer, and the heat insulation layer is a polyethylene layer. The surface of the heat preservation layer is sleeved with a waterproof layer which is a polyvinyl chloride layer, and the waterproof layer is fixedly connected with the heat insulation layer. According to the utility model, since the foaming polypropylene material is internally provided with a large number of air cavities, heat exchange between the sheath and the outside can be reduced, the lead generates heat in the power transmission process, and the heat of the lead can heat the sheath by means of the thermal insulation layer, thereby preventing the sheath from hardening, improving the bending resistance of the cable, and prolonging the service life of the cable. And by arranging the heat insulation layer made of a polyethylene material, external low temperature can be further isolated, and the bending resistance of the cable is further improved.

The invention discloses high-temperature large-temperature-difference early-strength low-density well cementation cement slurry and a preparation method thereof, and relates to the technical field of oil and gas well cementation. The well cementation cement slurry comprises the following components in parts by mass: 100 parts of oil well cement; 15-35 parts of a high-temperature strength stabilizer; 10-30 parts of a lightening agent; 0.2 to 0.6 part of an early strength agent; 0.3 to 0.7 part of a high-temperature suspension stabilizer; 1-5 parts of a high-temperature fluid loss agent; 0.3 to 0.7 part of a high-temperature retarder; and 50-70 parts of water. The problems that in the prior art, large-temperature-difference low-density cement paste is poor in rheological property, too large in water loss, poor in high-temperature stability, slow in strength development and the like are solved, safe well cementation construction of a long-sealing-section easy-leakage stratum is achieved, and therefore efficient and safe exploitation of deep stratum oil and gas resources is guaranteed.

The invention belongs to the technical field of plastic recycling, and particularly relates to a PC engineering plastic recycling cabinet which comprises a pulverizer, a plastic extruder, a granulating bin and a pulverizing and cleaning bin, an interlayer air drying bin exists between the granulating bin and the pulverizing and cleaning bin, the pulverizer is arranged in the pulverizing and cleaning bin, and the bottom of the pulverizer communicates with a conveying device. The conveying device penetrates through the cleaning pool and is communicated with the air drying bin, a water through hole is formed in the position, corresponding to the cleaning pool, of the conveying device, a plastic extruder is arranged in the granulating bin, a granulating device is arranged at the discharging end of the plastic extruder and used for cooling plastic, and the side, close to the air drying bin, of the granulating bin is located on the upper side and the lower side of the granulating device; the air drying bin comprises a porous rotary belt, and the inner side of the porous rotary belt is communicated with an air outlet of the third fan. According to the invention, defective products and leftover materials in the plastic production process can be fully automatically recycled and granulated in a small space.

The invention discloses a cooling and conveying device for preventing over-temperature denaturation of a compound fertilizer, and relates to the technical field of compound fertilizer production, the cooling and conveying device comprises a plurality of groups of cooling units, and each cooling unit comprises a clamping piece, an extension rod, a clamping rod and a fan; the multiple sets of material turning units comprise erecting plates, multiple sets of control rods, screening assemblies and material turning assemblies. The device has the beneficial effects that materials are preliminarily filtered by the toothed plate, large or hardened particles can be removed, and it is ensured that the sizes of the particles subjected to follow-up turning treatment are uniform. And therefore, the influence of large particles on the air cooling effect can be reduced, and cold air can be in contact with each particle more effectively. The particles are redistributed in the turning process, the contact area between the particles and cold air is increased, rapid heat dissipation is promoted, and therefore the overall heat dissipation effect is improved, and the phenomenon that the particles adhere or harden due to high temperature is prevented.

The invention discloses PSE-like chicken breast composite gel soft food suitable for people with dysphagia and a preparation method of the PSE-like chicken breast composite gel soft food, and belongs to the field of food processing. The raw materials of the composite gel soft food comprise PSE-like chicken breast, konjac glucomannan and a sodium chloride solution, and the preparation method comprises the following steps: adding a mixed solution of konjac glucomannan and sodium chloride into PSE-like chicken breast, stirring, carrying out heating treatment after uniform stirring, and then cooling to obtain the PSE-like chicken breast composite gel soft food. The prepared food is stable in total protein content, can effectively make up for insufficient intake of meat protein caused by limited feeding of people with dysphagia, and prevents malnutrition; the product texture meets the swallowing requirement, reaches the IDDSI level 5 or level 6 standard, can effectively reduce the risk of food residue and aspiration in the swallowing process, and has nutrition balance and food safety.

The utility model discloses a gun needle sealing mechanism which comprises a first sealing block and a second sealing block, the first sealing block is arranged on the outer surface of a gun needle, the two ends of the first sealing block are each provided with a first spring seal, and the two first spring seals are both arranged on the outer surface of the gun needle in a sleeving mode; a first sealing assembly is arranged on the outer side of the first sealing block and arranged between the first sealing block and the spray gun shell. The second sealing block is arranged on the outer surface of the gun needle, a second spring seal is arranged on the outer side of the second sealing block, the second spring seal is arranged between the second sealing block and the spray gun shell, a second sealing assembly is arranged in the second sealing block, and the second sealing assembly is arranged between the second sealing block and the gun needle. The second sealing assembly is arranged on the outer surface of the gun needle in a sleeving mode. According to the spray gun, slurry such as glaze can be effectively prevented from being hardened in the gap between the gun needle and the spray gun shell, then the gun needle can be effectively prevented from being clamped, and the service life of the spray gun is prolonged.

The invention provides an end sealing and cooling structure for a plunger. The end sealing and cooling structure for the plunger comprises a sealing sleeve and the plunger arranged on the core portion of the sealing sleeve in a penetrating mode. A threaded sleeve, a water jacket, a three-stage sealing structure and a guide sleeve are sequentially arranged between the plunger and the sealing sleeve; annular cooling flow channels are formed between the water jacket and the plunger and between the water jacket and the sealing sleeve respectively. The annular cooling flow channels are communicated with a cooling medium inlet and a cooling medium outlet in the sealing sleeve. A pressure detection device is arranged on the quick-change connector at the cooling medium outlet; the three-stage sealing structure comprises three UN sealing rings and three supporting rings, and the UN sealing rings and the supporting rings are arranged at intervals; an annular groove is formed in the UN sealing ring, an annular protrusion is arranged on the supporting ring, and the annular protrusion is connected with the annular groove in an inserted mode. The problems that an existing sealing structure is prone to failure in the high-temperature and high-pressure environment, and sealing failure cannot be found in time are solved.

This invention discloses a harmless treatment device for livestock and poultry breeding waste, belonging to the field of anaerobic treatment technology. To address the problem of biogas suffocation during biogas digester use, leading to a significant reduction in effective gas production and affecting digester safety, as well as poor gas-liquid separation during gas collection and severe liquid contamination in biogas, resulting in low pure gas capture rates, the invention includes a biogas digester body and an inlet connected to one side of the digester body. A skylight cover is fixed to the upper center of the digester body, and ventilation ports are provided on both sides of the bottom surface of the skylight cover. This invention enables the collection and circulation of biogas from within the liquid. Combined with the ventilation ports and guide pipes, it collects and circulates the naturally rising biogas within the digester body, improving biogas collection efficiency while preventing scum and foam from covering the gas-liquid interface, thus avoiding suffocation of biogas and affecting biogas collection efficiency and pressure safety within the digester body.

The invention provides modified rare earth polishing powder as well as a preparation method and application thereof. The modified rare earth polishing powder comprises rare earth polishing powder and modified groups chemically bonded to the surface of the rare earth polishing powder, the modified groups comprise A-type groups and B-type groups, and the A-type groups are phosphorus-containing groups; the B group is a carboxyl group with a long-chain structure and is generated through a bonding reaction between one or more of carboxymethyl cellulose and sodium salt thereof, an acrylic polymer and a derivative thereof and the rare earth polishing powder. In the modified rare earth polishing powder disclosed by the invention, the surface of the rare earth polishing powder contains two types of modified groups A and B, and the modified groups A and B have relatively strong interaction with the surface of the rare earth polishing powder and can synergistically inhibit particle aggregation of the rare earth polishing powder, so that the suspension stability and redispersibility of the modified rare earth polishing powder are greatly improved; high polishing efficiency and high polishing precision can be well considered, and the requirements of precision polishing fields of precision optical glass, liquid crystal display glass substrates, integrated circuits and the like are met.

The utility model relates to the technical field of corn production, and disclose a kind of corn fertilizing device, including cart, and the top surface of cart is provided with fertilizing mechanism and stirring mechanism, and fertilizing mechanism includes support assembly and fertilizing assembly, and support assembly is located at the side of fertilizing assembly. By setting up fertilizing mechanism, by setting up first support frame to install box, simultaneously by setting up first motor to drive first bevel gear and second bevel gear to engage, to carry out multiple stirring operation to the fertilizer in the box, to effectively prevent the hardening phenomenon of fertilizer in the box, it is convenient for corn to fertilize;By setting up stirring mechanism, by setting up second motor to drive second rotating rod to rotate, simultaneously provided with first hydraulic rod moves L-shaped plate, so that first support plate and box reciprocate, ensure that fertilizer is accurately applied to the root area of corn, meet the needs of different growth stages, facilitate corn production.

The application relates to the technical field of glass steel equipment, and relates to a glass steel biological filter deodorization equipment. The deodorization equipment comprises a biological pool and a pre-washing pool. The pre-washing pool is provided with a circulating pipeline, odor gas enters the pre-washing pool through the circulating pipeline, the pre-washing pool is filled with water covering the water inlet position, and a flow guide member for slowing down the gas flow speed is arranged on the inner side of the water inlet end of the pre-washing pool. A wind pipe and a shunt cavity are arranged between the biological pool and the pre-washing pool and are connected in front and back. The input end of the wind pipe is located on the top of the water outlet end of the pre-washing pool. The wind pipe is an n-shaped channel structure. The wind pipe is provided with a first spraying device. The shunt cavity is located at the bottom of the biological pool. The biological pool is provided with a stirrer. The application can help solve the problems of poor gas-liquid mixing effect and easy hardening and difficult maintenance of the biological pool.

The invention relates to the technical field of electronic component surface mounting equipment, and discloses electronic component surface mounting equipment for intelligent manufacturing, which comprises a working box and a protective door mounted in the working box, and further comprises a circuit board arranged in the working box and used for smearing solder paste on the circuit board, and a power supply arranged in the working box and used for supplying power to the circuit board, the fixing mechanism is arranged in the working box and is used for fixing a circuit board; the smearing box is connected to the top of the inner wall of the working box through a third air cylinder and used for smearing solder paste to the circuit board; and the smearing mechanism is arranged in the smearing box and is used for uniformly smearing the solder paste. According to the tin paste smearing device, through the arranged smearing mechanism, alternate smearing is carried out through the smearing plates installed below the two tin paste storage barrels, so that the smearing positions of the smearing plates below the two tin paste storage barrels are enlarged, and the situation that the tin paste is placed and smeared unevenly or smeared left is avoided.

The utility model is applicable to the technical field of superfine silver powder production, and provides superfine silver powder production equipment for silver electrolytic refining, which comprises a mounting box, a drying kettle, a stirring device and a control device, the mounting box is internally provided with the drying kettle, and the drying kettle is used for processing washed superfine silver powder subjected to electrolytic refining; the electric heating tube is used for heating and is arranged on the drying kettle; the lifting type kettle cover is arranged in the mounting box, a shaft rod is rotationally mounted on the kettle cover, and a turning and stirring frame used for turning and stirring superfine silver powder subjected to electrolytic refining is arranged at the bottom end of the shaft rod. According to the superfine silver powder production equipment for silver electrolytic refining, the problems of silver powder hardening, uneven heating, long drying time and the like existing in the superfine silver powder drying process of a traditional electrothermal blowing drying box are solved, the production efficiency and yield of the superfine silver powder are improved, and the quality of the silver powder is further guaranteed.

The invention discloses a built-in pump sealing material for SPA. The high-strength and high-toughness plastic material is prepared from the following components in parts by weight: 90 to 100 parts of acrylonitrile-butadiene-styrene, 8 to 10 parts of petroleum resin, 15 to 20 parts of silicon rubber, 8 to 12 parts of rubber fiber, 8 to 12 parts of polyester fiber, 2 to 3 parts of p-xylene tetraaminomethylthiazole, 1 to 2 parts of dibutyl phthalate, 0.5 to 1 part of stearic acid, 2 to 4 parts of paraffin, 2 to 3 parts of tributyl citrate, 3 to 5 parts of glycerol and 1 to 2 parts of phosphite ester. The built-in pump sealing material for the SPA and the manufacturing process of the built-in pump sealing material have the beneficial effects that by optimizing the composition of the material and improving the production process, the high-temperature resistance and high-pressure resistance of the sealing material are effectively improved, and the aging, deformation and fatigue phenomena of the material are delayed, so that the durability of the sealing effect is remarkably improved.

The invention discloses a konjak taro ball capable of keeping chewy at low temperature and a preparation method thereof, and belongs to the technical field of konjak taro ball preparation, the konjak taro ball comprises the following components by weight: 15-35 parts of konjak powder, 5-15 parts of tapioca flour, 1-2 parts of a sweetener, 3-5 parts of cranberry pulp, 1-3 parts of vaccinium bracteatum thunb juice, and 40-75 parts of water. Through a specific formula and a specific processing technology, the konjak balls can keep the elastic characteristic at low temperature, and the problem that the quality of the konjak balls is reduced at low temperature in the prior art is solved.

The invention provides a slow-release microbial fertilizer for improving saline-alkali soil and a preparation method of the slow-release microbial fertilizer. The microbial fertilizer is prepared from the following components in parts by weight: 100 to 150 parts of urea, 40 to 50 parts of crop straw, 3 to 9 parts of biochemical fulvic acid, 8 to 20 parts of chitosan / gelatin composite hydrogel, 10 to 20 parts of wormcast, 4 to 12 parts of desulfurized gypsum, 1 to 4 parts of microbial agent, 2 to 8 parts of nano humic acid, 12 to 22 parts of nano diatomite and 2 to 8 parts of soil conditioner. The prepared slow-release microbial fertilizer has the effects of promoting crop growth, improving the soil quality of saline-alkali soil and increasing the organic matter content of the soil, can better regulate the physical and chemical properties of the soil, and can inhibit harmful bacteria, enrich the diversity of beneficial bacteria and quickly improve the soil structure.

The cutting equipment comprises a machine body, a first conveying roller, a roller body and a cutting blade, a support is fixedly installed on one side of the machine body, the first conveying roller is arranged above the support, the output end of a driving motor is fixedly connected with a first gear, and the output end of the driving motor is fixedly connected with a second gear. A first gear is arranged above the roller body, a second gear is arranged above the first gear, an installation sleeve is arranged on the roller body, a cutting blade is fixedly installed on the installation sleeve, a sliding block is fixedly installed on the inner wall of the installation sleeve, and a sliding groove is formed in the contact position of the roller body and the sliding block. Through the arrangement of the sliding blocks and the sliding grooves, after the fixing bolts are unscrewed, the cutting blades can be detached from the roller body, adhesive tape adhesives adhering to the surfaces of the cutting blades can be cleaned, adhesive residue can be effectively prevented, the situation that the adhesives adhere to the surfaces of the cutting blades and are hardened can be effectively avoided, the service life of the cutting knife is prolonged, and the service life of the cutting knife is prolonged. And meanwhile, the cutting blade can be conveniently detached for maintenance or replacement.

The application discloses a drainage bag with an antibacterial functional layer and a preparation process thereof, and relates to the technical field of medical materials, and comprises the following steps: adding modified montmorillonite into N, N'-dimethylacetamide, uniformly mixing through ultrasonic, adding a polyurethane film, ultrasonic immersion for 60-120 min, drying, and obtaining a drainage bag substrate; adding polylactic acid into N, N-dimethylformamide, uniformly stirring and mixing, adding modified nano zinc oxide, uniformly mixing through ultrasonic, and then performing electrospinning to obtain an antibacterial coating fiber film; placing the antibacterial coating fiber film on the inner side surface of the drainage bag substrate, high-frequency heat sealing, assembling, and obtaining the drainage bag.

The invention relates to the technical field of pharmaceutical preparations, discloses a preparation method of pediatric paracetamol and amantadine hydrochloride granules, and aims to improve the stability and uniformity of medicines. The method comprises the following steps: preparing an adhesive, preparing a pre-mixture, carrying out wet granulation, drying wet granules, and finally finishing the granules. Through a multi-stage premixing and optimized wet granulation process, the uniform distribution of medicine components is ensured; segmental temperature control based on dissolution rate is adopted in the drying process, so that the drying time is effectively shortened, and particle surface hardening is prevented; according to the method, the dissolution performance and bioavailability of the medicine are improved, and the production efficiency and the stability of the product quality are remarkably improved.

The invention relates to a rosin-free depilatory hot wax and a preparation method thereof, and belongs to the technical field of depilatory hot wax. The depilatory hot wax comprises the following raw materials by weight: 30 to 70 parts of wax-based substances, 1 to 5 parts of carboxylated cellulose nanocrystals, 3 to 7 parts of coconut oil-based wax esters, 0.1 to 1 parts of depilatory proteases, 5 to 10 parts of modified polyols, 3 to 5 parts of polyurethane dispersions and 0.3 to 2 parts of colorants; wherein the coconut oil-based wax esters are synthesized from coconut oil, coconut alcohol and immobilized lipase; the modified polyols are synthesized from triglycerides after epoxidation reaction and then hydroxylation reaction. The depilatory hot wax of the invention does not add any additives containing any rosin or rosin derivatives with rosin as raw material, thus avoiding the occurrence of users being allergic to rosin and its derivatives, and has high depilatory efficiency, low drop melting point, can significantly reduce skin pain, and has good film-forming properties and is easy to tear.

The utility model relates to the technical field of valve devices, and discloses a connection type spaceflight valve device which comprises a valve body and two valve bodies arranged at the two ends of the valve body, the end, away from the valve body, of one valve body is connected with a flange, and the end, away from the valve body, of the flange is provided with a small isolation flange gasket. The valve body comprises a valve ball, a valve rod, a connecting cover, a low-temperature RPTFE packing combination, a spinning cover and an anti-loosening assembly. The upper end and the lower end of the low-temperature RPTFE filler combination are connected to the interior of the connecting cover by adopting an embedded structure; the rotary pressing cover is rotationally mounted in the connecting cover through threads, and the rotary pressing cover is pressed in the connecting cover through the anti-loosening assembly; the anti-loosening assembly comprises a clamp and a clamp spring gasket. Through the triple sealing structure of the metal sealing ring, the low-temperature RPTFE packing combination and the small isolation flange gasket, the sealing grade is effectively improved, the sealing stability is enhanced, the device is suitable for vacuum, low-temperature and special atmosphere environments, and the high requirement of an aerospace system for the sealing performance is met.

The present invention relates to the field of rail transit technology, and in particular to a locomotive sand spreading device and method, the device comprising a box, a dragon conveying mechanism, a double thread straight-through, a sand spreading component, a collection component and a control component; the method comprises calculating the slip rate according to the sliding speed of the wheel to preliminarily determine the amount of sand material put in based on the slip rate; obtaining the area ratio of the gray value greater than the preset gray value in the track image, and correcting the amount of sand material put in based on the area ratio; determining to start the heating component and determine the heating power based on the ambient temperature, determining whether the heating power meets the standard based on the ambient humidity, and correcting the heating power that does not meet the standard. The present invention improves the efficiency of sand spreading.