344results about How to "Difficult to distribute" patented technology

The invention discloses a construction method of a large-volume concrete bearing platform with one-time pouring in winter, comprising the following steps of: step 1, binding steel reinforcement cages; step 2, laying cooling water pipelines and temperature measuring elements; step 3, constructing formed templates, wherein the construction process comprises delimiting template lines and constructing formed brick dies; step 4, pouring concrete; and step 5, conserving and finishing surface: finishing surface in time when completing the pouring of the concrete, carrying out the surface finishing twice, carrying out the first surface finishing when pouring the concrete to the top, carrying out the second surface finishing when the concrete is initially congealed, and adopting a mode that external stores water for conserving when the concrete is initially congealed. The invention has the advantages of reasonable design, simple construction method step, convenient operation, short construction period, one-time pouring molding and strong maneuverability, the large-volume concrete bearing platform constructed for molding in winter has good quality, the poured concrete is not frozen, and the surface of the bearing platform can not have temperature cracks.

The present invention discloses a new type wall body light heat-preservation material, which is characterized in that: the present invention comprises the following raw materials according to the weight ratio: 10-15 percent of magnesia or magnesium hydrate, 3- 7 percent of magnesium chloride, 4-8 percent of perlite, 1-5 percent of alkali resisting fibre, 6-12 percent of powder coal ash or calcium carbonate and 0.3-1 percent of modifier, wherein, the modifier is made of the following components according to weight ratio: 6-10 percent of ferrous sulfate, 1-3 percent of oxalic acid, 1-3 percent of tertiary sodium phosphate, 0.5-2 percent of hexametaphosphate and 12-18 percent of aluminium sulphate. Compared with the original heat-preservation system, the material is with much better heat-preservation performance, much lower heat-conductivity coefficient, much lower density, and much lower water content and water absorption ability. The present invention is with much better performance in heat-preservation, heat-insulation as well as sound absorption and sound insulation and so on. The present is able to bear or endure acid, alkali and corrupted. The manufacturing cost is much lower and the construction process is much more convenient. The present is easy to be popularized.

The invention provides a production process of an enamel steel plate, comprising the steps of forming, pretreating, ground coat spraying, drying, furnace burning, over glaze spraying, drying, furnace burning and back surface underboarding. The enamel steel plate has the advantages of bright color, even glaze distribution, seismic resistance, noise reduction and long service life, and is safe and environmental-friendly, and can be applied in the industries such as art murals, household enamel products, industries, buildings and the like. The enamel steel plate in the invention is a compound material which is formed by the steps that a high quality steel plate as a substrate is processed by a static dry method and then is burnt with inorganic nonmetallic material at high temperature so that tight chemical bonds are between the high quality steel plate and the inorganic nonmetallic material generate, and the enamel steel plate is a perfect combination of metals and inorganic materials. The enamel steel plate has flexibility of a steel plate substrate and also has the characteristics of acid-base resistance, endurance, non-combustion, safety, environmental protection and the like of an inorganic enamel layer. The enamel steel plate in the invention is static-free and is easy to clean, the enamel surface is fine and smooth, shakeproof, compression resistant and noise resistant and has small possibility of dust accumulation, the service life is long, and the enamel steel plate does not need to be maintained for 50 years under regular atmospheric environment.

The invention belongs to the technical field of composite materials, and particularly provides a composite layered structure thermal insulation material high in thermal insulation efficiency. The thermal insulation material is formed by arranging and combining heat high-reflectivity materials and low-thermal-conductivity materials alternately. The thermal insulation material is different from an existing thermal insulation material which achieves the thermal insulation effect on the basis of heat conduction limit. The composite layer structure thermal insulation material high in the thermal insulation efficiency is based on material layered combination, can limit heat conduction, and can also effectively limit heat convection and heat radiation, thereby obtaining the efficient thermal insulation effect. The thermal insulation material can be used for petroleum conveying pipelines, buildings, equipment and the like.

The invention relates to pesticide stirring equipment and particularly relates to stirring equipment of a plant protecting unmanned aerial vehicle for spraying a pesticide, which has time- and labor-saving effects, stirs the pesticide sufficiently and thoroughly, and prevents people from inhaling toxic gas in the stirring process. In order to solve the technical problems, the stirring equipment comprises a bottom plate, a bracket, a connecting plate, a stirring box and the like; the left side of the top of the bottom plate is connected to the bracket by way of bolt connection, and the right side of the upper portion of the bracket is connected to the connecting plate by way of bolt connection. A first stirring device is driven by the driving device to stir the pesticide and clean water. The stirring equipment is also provided with an air stirring device, so that the pesticide and clean water stirring effect is further improved, and the effects that the stirring equipment has time- and labor-saving effects and stirs the pesticide sufficiently and thoroughly, and people are unlikely to inhale toxic gas in the stirring process are achieved.

An energy-saving and environmentally-friendly kiln body comprises a thermal insulation fire-proof layer, a calcining chamber, a graphite crucible, horizontal heating chambers and a sealing box, wherein the graphite crucible and the thermal insulation fire-proof layer are respectively arranged inside and outside the calcining chamber; the upper horizontal heating chamber and the lower horizontal heating chamber are respectively arranged above and under the graphite crucible; an upper horizontal heating body and a lower horizontal heating body that correspond to each other are horizontally arranged in the upper horizontal heating chamber and the lower horizontal heating chamber; one end of each horizontal heating body is arranged in each heating chamber, and the other end of the horizontal heating body passes through a side wall, the thermal insulation fire-proof layer and a furnace shell in sequence and then extends into the sealing box; high-temperature fibers are filled in gaps between the heating bodies and plug bricks; and a gas inlet port and a copper electrode are arranged on the sealing box. In a vanadium-nitrogen alloy high-temperature sintering kiln adopting the energy-saving and environmentally-friendly kiln body, a low-temperature segment, a transition segment and a high-temperature segment adopt different manufacturing materials and different heating bodies so as to adapt to calcining processes. According to the design, the unit energy consumption is lower, and the operation conditions are better; in addition, the process atmosphere and the calcining effect in the kiln are better, and the service life of the kiln is longer.

The invention provides cockroach bait gel. The cockroach bait gel comprises a stomach toxicity component, a phagostimulant, a thickening stabilizer, a preservative, a moisturizer and water, wherein the phagostimulant contains cassava starch. Compared with the prior art, the cockroach bait gel has the following beneficial effects that 1, the cassava starch is first used as the phagostimulant to be applied to the cockroach bait gel, the palatability is good, the attractive force is strong, and the safety is strong; 2, the gel is stable and looks fine, and the cockroach bait gel is unlikely to go bad and free from radiating unpleasant smell; 3, the cockroach is attracted to take the cockroach bait gel initiatively, and the purpose for killing the cockroach through the stomach toxicity component can be realized; 4, the cockroach bait gel is particularly suitable for preventing German cockroach and has a good effect.

The invention relates to vomit collecting equipment, in particular to special vomit collecting equipment for infectious patients. The invention aims at providing the special vomit collecting equipmentfor the infectious patients, so that the vomit odor cannot easily emit. In order to solve the technical problems, the invention provides the special vomit collecting equipment for the infectious patients; the special vomit collecting equipment comprises an installing frame, wheels, an installing plate, a through hole, screw bolts, fixing blocks, rubber bulges and the like, wherein the wheels arearranged at the lower side of the installing frame; the installing plate is arranged above the installing frame; the through hole is formed in the middle part of the installing plate; the screw boltsare symmetrically arranged at the left side and the right side of the upper side of the installing plate; a fixing bock sleeves the lower side of each screw bolt. The special vomit collecting equipment has the beneficial effects that the vomit odor cannot be easily emitted into air; a bag opening of a collecting bag can be pressed by press blocks arranged on connecting rods arranged at the left side and the right side, so that the odor of the vomits of the infectious patients cannot be easily emitted, so that the effect of reducing the infection channels of infectious diseases is achieved.

The invention relates to an air purification elimination agent, and belongs to the field of technologies for purifying and treating air.The air purification elimination agent aims to solve the problem of low purification efficiency at present.The air purification elimination agent comprises, by weight, 6.0%-10% of perchlorate, 2.0%-4.0% of buffering agents, 20%-40% of propylene glycol materials, 10%-20% of water-absorbent resin and the balance water.The air purification elimination agent has the advantages that effects of effectively removing harmful gas such as formaldehyde, benzene and ammonia in air can be realized, and the air purification elimination agent is high in removal efficiency.

The invention provides a natural heating greenhouse. The natural heating greenhouse comprises wall bodies built on a foundation, a support arranged above the wall bodies and transparent films laid on the support, wherein a shady-side wall body is higher than a sunny-side wall body; each wall body consists of a concrete base layer and an insulating layer formed by connecting EPS modules and arranged on at least one side of the concrete base layer; the support comprises an upper layer and a lower layer, a transparent film is arranged on each layer of the support, and a retractable insulating quilt is arranged above the transparent film of the lower layer of the support. The natural heating greenhouse integrates the characteristics of lighting, insulating, irrigating and the like, can ensure that the temperature in the greenhouse is suitable for the growth environment of crops under the condition of no heating arrangement, and is good in heat insulation effect and low in constructing and running cost.

The invention provides an environment-friendly chlorofluorocarbon-free refrigerant and a preparation method thereof. The refrigerant is prepared from propane, propylene, cyclobutane, 2,3,3,3-tetrafluoropropene, trans-1,3,3,3-tetrafluoropropene, trifluoromethyl iodide, pentafluoromethyl iodide, difluoromethane, tetrahydrothiophene, liquid carbon dioxide and cryogenic lubricant. The refrigerant has the beneficial effects that the ODP value is zero, the ozone sphere cannot be destroyed if the refrigerant is used for a long time; the GWP value of raw materials is low, and the working pressure of the refrigerant is equivalent to that of R22, so that an existing refrigeration system need not to be modified, the production cost can be reduced, while the refrigeration effect is not reduced; the refrigerant has the effects of inhibiting combustion and explosion, so that the combustibility of the refrigerant can be reduced, and the safety can be improved; the lubricant can seep into each part of a compressor together with the refrigerant so as to create an excellent condition for engine lubrication; tetrahydrothiophene is easily dissolved in difluoromethane and has a strong unpleasant smell, so that when the refrigerant leaks, a user can feel leakage of the refrigerant at the first time and carries out corresponding measures, so that property and safety of people can be protected.

The invention discloses a mobile locating pedestal pan device for an electric nursing bed. The device comprises a bed frame, a driving mechanism, a vertical movement mechanism, a horizontal movement mechanism, and a pedestal pan, wherein a first guiding rail is fixed on a first supporting rod of the bed frame and cooperates with a first sliding block; a spindle is connected between a sixth supporting rod and a fourth supporting rod; a swing axle is hinged to the upper end of a second connecting rod, and the lower end of the second connecting rod is hinged to the middle sections of two second guiding rails; one end of each second guiding rail is hinged to the fourth supporting rod and the sixth supporting rod respectively, and cooperates with a second sliding block; the spindle drives the swing axle to rotate, and the second connecting rod is also driven by the spindle to pull the second guiding rail to rotate, and meanwhile, the first sliding block and the pedestal pan are driven to conduct horizontal linear movement; a lifting supporting plate is hinged to the second sliding block; sliding grooves arranged on both sides of an installation box are used for limiting the movement of the lifting supporting plate; a damping block is fixed on the center of the first guiding rail; the spindle drives the swing axle to rotate to drive the second guiding rail to rotate and pull the lifting supporting plate, thereby achieving the movement of the pedestal pan. The mobile locating pedestal pan device for the electric nursing bed aims at solving the problems that patients or the olde have difficulties in going to a toilet.

The invention relates to a package box, in particular to an anti-corrosion conveying box for aromatic fruit. The box comprises a box body, a box cover, an air extracting pump and multiple waveform-shaped partition boards. The box cover is buckled with the box body correspondingly. The inner wall of the box body is provided with multiple installing bosses for installing the waveform-shaped partition boards in a surrounding manner. All the installation bosses are arranged at intervals along the height direction of the box body and used for separating the interior of the box body into mutually-parallel accommodating cavities. A first air hole is distributed in the box cover. An air passing film covers the first air hole. Second air holes are arranged in all the waveform-shaped partition boards. An air inlet end of the air extracting pump communicates with the box body through an installing port at the bottom of the box body. A temperature and humidity inductor is arranged in the box body and the temperature and humidity inductor and the air extracting pump are electrically connected with a central processor. The anti-corrosion conveying box for aromatic fruit has following beneficial effects: problems of a conventional storage and transport box such as poor ventilation and easy corrosion of fruits are solved through a self-feedback system.

The invention discloses a hot-air drier, comprising a heat-retaining housing, and drying cylinder columns, hollow drying cylinders, a radiator, a circulating blower fan, a circulating wind adapter, a hot-air channel, a pipe and an electrostatic dehydrator which are arranged in the heat-retaining housing. The heat-retaining housing has a feed inlet and outlet. More than one pair of drying cylinder columns are distributed in the heat-retaining housing, two rows of high-low staggered hollow drying cylinders are arranged between each pair of drying cylinder columns. The hollow drying cylinders are driven by a transmission mechanism. At least one radiator for heat generation is arranged in the heat-retaining housing. The circulating blower fan driven by the motor frequency conversion control is arranged on the radiator. The hot-air channel is hollow and provided with a hot-air nozzle. The circulating wind adapter is connected with the circulating blower fan and the hot-air channel. The electrostatic dehydrator is connected with the radiator through the pipe, the electrostatic dehydrator is used for absorbing the stream, filtering out water and sending air to the radiator by the pipe to form a circulation. The invention has lower cost, environmental protection, energy conservation, safety and the like.

The invention discloses polyhydroxybutyrate-based degradable 3D (Three Dimensional) printing supplies. The polyhydroxybutyrate-based degradable 3D (Three Dimensional) printing supplies are prepared from the following ingredients in parts by weight: 50 to 80 parts of master batch, 40 to 80 parts of modified starch, 1 to 3 parts of pigment and 2 to 4 parts of assistant, wherein the master batch is polyhydroxybutyrate plastic; the assistant is prepared from the following ingredients in parts by weight: 10 to 15 parts of lubricant, 20 to 40 parts of plasticizer and 5 to 10 parts of antioxidant; the lubricant is one of barium stearate, fatty acid amide and glycerol monostearate; the plasticizer is one of DEHP (Di 2-Ethyl Hexyl Phthalate), DOP (Dioctyl Phthalate) and DBP (Dibutyl Phthalate); the antioxidant is an antioxidant 1010 or an antioxidant TNP (Trinitrophenol). The polyhydroxybutyrate-based degradable 3D (Three Dimensional) printing supplies disclosed by the invention have stronger mechanical property and good stability, are not easy to emit harmful substances during a using process and can be widely applied to the field of food packaging and living.

The invention relates to the technical field of an array antenna, and discloses a low-thermal-resistance connector-less feed array antenna; the array antenna is characterized by specifically comprising a printed board, an antenna unit and a transceiving assembly, wherein a metalized through hole is formed in the printed board; one end of the metalized through hole is connected with the antenna unit through conductive adhesive while the other end of the metalized through hole is connected with the transceiving assembly; and feeding is performed to the antenna array through the metalized through hole. A connector is not required to realize high-frequency signal transmission between the array antenna and a feed network, so that signal transmission loss caused by the connector is eliminated, and the array unit failure caused by the failure of the connector is avoided as well; therefore, the electrical performance and the reliability of the array antenna are improved; and the invention also discloses an implementation method for the low-thermal-resistance connector-less feed array antenna.

The invention discloses a seawater desalination material based on polyurethane foams and a preparation method thereof, and belongs to the technical field of seawater desalination. The preparation method of the material comprises the following steps: (1) low-cost graphene oxide is reduced into reduced graphene oxide, and the reduced graphene oxide is mounted on polyurethane sponge; and (2) an urushiol iron conjugate is assembled on the sponge through self-assembly to prepare the sponge with super heat absorption performance and hydrophobic performance. According to the seawater desalination material based on the polyurethane foams and the preparation method thereof, the designed and synthesized heat-absorbing hydrophobic sponge has a porous structure and is beneficial to water transportation; and the black hydrophobic sponge surface greatly reduces heat loss caused by heat transfer to a water body, and the material has good solar energy utilization rate and evaporation rate, shows goodsalt resistance, and has a wide application prospect in the field of seawater desalination.

The invention discloses a detector the bearing and thermal insulation effect of a thermal insulation material. The detector comprises a pedestal and a top plate, the top plate is mounted on the pedestal, first electric telescoping columns are vertically connected to the periphery of the bottom of the top plate, movable grooves are arranged in the two sides of the top of the pedestal along the length direction, the two ends of each movable groove are vertically provided with location holes, and the bottoms of the first electric telescoping columns are inserted into the location holes respectively. The detector can detect different types of plates or detect the same type of plate for multiple times, the detection accuracy is higher, and the detector can meet different work requirements. During detection, the work efficiency is high, and operation is simple. When thermal insulation plates of the same type are detected for multiple times, a flat plate is replaced each time, and the detection accuracy can be ensured. The bearing intensity of the plate can be detected rapidly and conveniently, the plates of different types and sizes are detected, the working efficiency is high and the accuracy is high.

The invention discloses a preserved sausage which comprises the following raw materials in parts by weight: 80-100 parts of lean meat, 1.8-2.5 parts of table salt, 0.5-0.8 part of monosodium glutamate, 1.8-3.2 parts of white spirit, 0.5-1 part of pepper, 0.3-0.8 part of black pepper, 0.2-0.5 part of foeniculum vulgare, 0.1-0.3 part of vanilla, 0.1-0.3 part of millet and 0.2-0.5 part of anise. The manufacturing method disclosed in the invention is simple, and the cost is low. Fat meat and lean meat are matched in proportion and cut into slices, and the specific batching method and baking technology of casing cleaning are used, so that the sausage has a strong flavor and a good taste, is transparent, attractive, clean and sanitary.

The invention discloses a preparation method of an antibacterial carbon fiber filter screen. The preparation method comprises the following operating steps of S1, compounding antibacterial liquid: adding small carpesium abrotanoides fruits in a composite family, lindley butterflybush flowers, herbal corydalis saxicola and emilia sonchifolia to boiling water, continuing decocting by a small fire for 2-3 hours, performing filtering to obtain filtrate, then adding xanthan gum to the obtained filtrate, and performing uniform mixing and stirring so as to obtain the antibacterial liquid; S2, modifying a carbon fiber filter screen: placing the carbon fiber filter screen in mixing liquid of 85-90 DEG C, and performing soaking treatment for 50-60 min; and S3, performing padding: padding the modified carbon fiber filter screen by the antibacterial liquid, wherein the padding pressure is 1-3kg / cm<2>, and after performing padding, performing drying treatment so as to obtain a finished product. The activated carbon fiber filter screen prepared through the adoption of the preparation method disclosed by the invention is notable in filtering effect, and notable in adsorbing effect of an ash layer; and the situation that the ash layer enters indoor air again can be effectively avoided, the restraining effect of pathogenic bacteria is notable, and viruses and microorganisms adsorbed on the surface of the filter screen can be effectively killed.

The invention discloses a coffee maker, which comprises a main machine, a coffee cup and a processing hopper capable of smashing or stirring a coffee raw material and filtering coffee liquid, wherein a first water inlet is formed in the main machine; the processing hopper comprises an inner hopper body and an outer hopper body which are used for accommodating the coffee raw material, a lateral wall of the inner hopper serves as a filter screen, and a first water outlet is formed in the outer hopper; when the processing hopper is installed on the main machine, the inner hopper body is in sleeve fit in the outer hopper body, a first accommodating cavity communicated with the first water outlet is formed between the inner hopper body and the outer hopper body, the first water inlet is communicated with the inner cavity of the inner hopper body, and the first water outlet can be communicated with the inner part of the coffee cup, and an area between the inner hopper body and the main machine and an area between an opening of the inner hopper body and an opening of the outer hopper body are both sealed. According to the coffee maker disclosed by the invention, the whole structure of newly improved to introduce a micropressure principle into the coffee maker; thus, not only can a coffee extracting rate and coffee drink purity be improved based on effectively shortening coffee making time, but also self making cost of coffee is low.

The invention provides a cylindrical wood formwork concrete pouring construction method, and relates to the technical field of building engineering construction. The cylindrical wood formwork is formed by sequentially setting the steps of formwork design, processing, positioning and paying-off, formwork assembly, formwork reinforcement, perpendicularity calibration, formwork pre-acceptance, concrete pouring, formwork removal and maintenance, and is formed by splicing two bent plates with semicircular arc lengths; a concave-convex opening design is adopted between connectors, formworks are installed in a staggered mode, positions of the horizontal connectors of an upper formwork and a lower formwork are reinforced through steel belts, meanwhile, the formworks are vertically positioned, stress of the formworks forms a whole, and the secondary reinforcing effect is achieved. Due to the fact that the formworks are installed in a staggered mode, the horizontal connectors of the upper formwork and the lower formwork are reinforced through the steel belts, the connectors are horizontally covered with the steel belts, it is guaranteed that the connectors are located in the middles of the reinforced steel belts, and the stability and construction effect of the formworks are greatly enhanced.

The invention specifically relates to green and natural bean sprouts and a simple production method thereof. The simple production method of the green and natural bean sprouts comprises the following steps of: punching a plurality of dewatering holes in the bottom of a plastic bottle, and cutting off the tapered part of a bottle mouth to form a planting container; carrying out selection, soaking and accelerating germination on bean species, and sub-packing in each planting container for planting when the bean species are revealed; transferring the planting container to a clean culture room which can create dark light and is good in air circulation, for carrying out planting management; and obtaining the natural and green excellent bean sprouts when the bottle is full of bean sprouts after 5-10 days. By implementing the simple production method of the green and natural bean sprouts, a waste plastic bottle is used as the planting container, so that not only can the cost be low, but also the waste can be changed into things of value. Simultaneously, safe, green, healthy, high-quality and fresh bean sprouts can be produced at home. When the bean sprouts are sold on the market, the whole bottle of bean sprouts can be placed in the market for selling, so that not only can the circulation in the market be convenient, but also the bean sprouts can be free of pollution and kept fresh and clean. The simple production method of the green and natural bean sprouts is simple and practical, and highly worthy of great popularization.

The invention belongs to the service robot field and relates to an unmanned meal delivery trolley. The unmanned meal delivery trolley comprises a trolley body; the upper part of the trolley body is provided with a lifting box; a meal delivery opening is formed in the top surface of the lifting box; two sides of the meal delivery opening are connected with door plates through hinges; a first telescopic mechanism and two second telescopic mechanisms are vertically installed in the lifting box; a tray is fixedly supported on the extension end of the first telescopic mechanism; the two second telescopic mechanisms are oppositely disposed at two sides of the first telescopic mechanism; connecting rods are hinged to the extension ends of the second telescopic mechanisms; and one end of each connecting rod, which is far away from a hinging center, is hinged to the corresponding door plate. The unmanned meal delivery trolley of the invention has a good heat preservation effect and a good sealing property. The unmanned meal delivery trolley will not accidentally touch food or tableware; aroma of food has little possibility of being emitted out form the unmanned meal delivery trolley, and therefore, a dining environment can be ensured; and the meal delivery opening can be opened by means of the operation of the first telescopic mechanism and the two second telescopic mechanisms, food onthe tray can be brought out and delivered to a customer, and thus, the degree of automation can be improved, and the customer can be greatly attracted by the unmanned meal delivery trolley.

The invention relates to a collection frame, in particular to a used tissue collection frame for the medical treatment gynaecology and obstetrics, and aims at achieving the technical purpose of providing the used tissue collection frame for the medical treatment gynaecology and obstetrics, accordingly, smells and bacteria on tissues are not prone to being emitted, and a storage box can automatically pop up. To achieve the above technical purpose, the used tissue collection frame for the medical treatment gynaecology and obstetrics is provided and comprises a collection frame body and the like.The outer side of the collection frame body is connected with a protection mechanism, and a storage mechanism is connected in the collection frame body. The used tissue collection frame for the medical treatment gynaecology and obstetrics achieves the effects that smells and bacteria on the tissues are not prone to being emitted, and the storage box can automatically pop up. Through automatic closing of an arranged cover plate and an arranged first rotation plate, the bacteria in the collection frame body are not prone to being emitted, and when a user opens the first rotation plate, the storage box can get out of a first through hole; and when the first rotation plate is closed, the storage box can automatically get inside, and the user can more conveniently place the storage box.

The invention provides a greenhouse without the need for a heating facility. The greenhouse comprises a wall body built on a foundation, a support arranged above the wall body and a transparent film laid on the support. The height of the shady side wall body is higher than that of the sunny side. The wall body is formed by a concrete base and thermal insulation layers, wherein the thermal insulation layers are arranged on the concrete base, and at least one side of each thermal insulation layer is formed by connecting expandable polystyrene (EPS) modules. The inner side of the shady side wall body is provided with a circulating water tank. A concrete base of the circulating water tank and the concrete base of the shady side wall body are connected together. The inner side and the outer side of the concrete base of the circulating water tank and the bottom of the circulating water tank are provided with insulation layers formed by connecting the EPS modules. The upper portion of the circulating water tank is provided with a circulating water pump, an outlet of the circulating water pump is connected with a spray nozzle and a soil heating pipe through a pipeline. The soil heating pipe is distributed in the soil inside the greenhouse. The greenhouse can ensure the temperature inside the greenhouse to be suitable for the growth environment of crops under the conditions of no need for heating devices, the thermal insulation effect is good, and the construction cost and operation cost are low.

The invention discloses PLA-based degradable 3D printing supplies, and the supplies comprise the following components in parts by weight: 50-80 parts of a master batch, 40-80 parts of modified starch, 1-3 parts of a pigment, and 2-4 parts of an auxiliary agent. The master batch is PLA plastic. The auxiliary agent comprises the following components: 10-15 parts of lubricant; 20-40 parts of a plasticizer, and 5-10 parts of an anti-oxidant. The lubricant is one of barium stearate, fatty acid amide and glyceryl monostearate. The plasticizer is one of DEHP, DOP and DBP. The anti-oxidant is anti-oxidant 1010 or anti-oxidant TNP. The PLA-based degradable 3D printing supplies have better mechanical properties and good stability, harmful substances are not easy to emit in usage process, and the PLA-based degradable 3D printing supplies can be widely applied to the fields of food package and life.

The invention discloses PBS-based degradable plastic, which is characterized by including the following components, by weight, 50-80 parts of a master batch, 40-80 parts of modified starch, 1-3 parts of a pigment and 2-4 parts of an additive. The master batch is PBS plastic. The additive includes the following components, by weight, 10-15 parts of a lubricant, 20-40 parts of a plasticizing agent and 5-10 parts of an anti-oxygen agent. The lubricant is one selected from barium stearate, fatty acid amide and monoglyceryl stearate. The plasticizing agent is one selected from DEHP, DOP and DBP. The anti-oxygen agent is an anti-oxygen agent 1010 or an anti-oxygen agent TNP. The PBS-based degradable plastic has both strong mechanical property and excellent stability, is not liable to generate harmful substances during use, and can be widely used in the fields of food package and living.

The invention relates to a concrete maintenance material and a preparation method thereof. The maintenance material comprises gauze, polyacrylamide and liquid paraffin by the ratio of area to weight per square meter: (10g to 50g): (10g to 20g); the method comprises the following steps that: the gauze is wetted and unfolded, and then the powdery polyacrylamide is uniformly sprayed on the gauze; after the polyacrylamide is dissolved into the water in the gauze, the gauze is dried; and finally the liquid paraffin is uniformly applied on any one side of the front side and the back side of the gauze at random, and the required product is prepared. The invention has the advantages of simple manufacturing and convenient use, can be adhered on a concrete template with water, effectively improve the water retention on the surface of the concrete, scatter early shrinkage stress, and prevent microcracks that large-volume concrete is easy to have in the early period.