296results about How to "Play a barrier role" patented technology

The invention discloses loudspeaker die set, and relates to the technical field of electroacoustic products. The loudspeaker die set comprises a housing in which a single loudspeaker body is contained; the single loudspeaker body comprises a vibrating system and a magnetic circuit system; an inner cavity of the whole die set is divided into two cavities, namely, a front vocal cavity and a rear vocal cavity, through the single loudspeaker body; a sound absorbing material is positioned in the rear vocal cavity; a separating structure for separating the sound absorbing material and the single loudspeaker body is also arranged in the rear vocal cavity; the whole rear vocal cavity is divided into a filling area and a non-filling area through the separating structure; the sound absorbing material which is foaming material is positioned in the filling area; the sound absorbing material is filled by foaming the foaming material and fully filled in the filling area. With the adoption of the loudspeaker die set, the technical problems of poor consistency and high production cost of the loudspeaker die set product in the prior art can be solved; the loudspeaker die set is high in acoustic performance, high in production efficiency, small in production cost, and high in product consistency.

The invention provides a construction cement production material crushing, stirring and drying device, and belongs to the technical field of construction machinery. The device comprises a box, an upper cover, a storage box, a base, a vibration reducing device, universal wheels, an absorbing device and a dehumidifier; the upper cover is arranged above the box; the upper cover and the box are detachably connected through a hexagonal nut and a stud; a cam is arranged on the upper side in the box; a rotating shaft is fixedly connected to the middle of the cam; and a push plate is arranged below the cam. A reciprocating motion of a crushing column is realized by using cooperation of the cam, the push plate, a return spring and a push rod, so that the crushing efficiency and the crushing qualityare improved; an insertion plate achieves a temporary barrier effect on materials in a crushing chamber; after the materials are thoroughly crushed, the insertion plate is pulled out; the materials in the crushing chamber fall down from through holes in the separation plate to enter a mixing chamber; and the dehumidifier is arranged on the left side of the mixing chamber for drying the materialsto effectively inhibit damage of the materials due to moisture.

The invention provides a method for preparing a chitosan-based superfine fiber carrier material for medical dressing, which is characterized in that the method comprises the following steps of: mixing chitosan powder and polyoxyethylene powder, dissolving the mixture into an acetate solution to preparing a spinning solution; adding the spinning solution into a static spinning device for static spinning, and receiving fiber on a cylindrical roller receiver to obtain a fiber film; and carrying out crosslinking treatment on the fiber film, and then placing the fiber film in a vacuum drying box to removing a residual solvent, to obtain the chitosan-based superfine fiber carrier material for medical dressing. The chitosan-based superfine fiber carrier material for medical dressing has advantages of ultrafine fiber structure, high porosity, and excellent hygroscopic property, moisture retention property and permeability, has certain bacterinertness, is conducive to healing of wound, and can reduce nursing intensity.

The invention discloses a weatherproof and wear-resisting cable sheath material which comprises the following raw materials in parts by weight: 40-60 parts of thermoplastic polyurethane elastomer, 20-30 parts of chloroprene rubber, 20-30 parts of chlorinated polyethylene, 30-45 parts of nano-titanium dioxide / graphene oxide, 10-15 parts of modified nano talcum powder, 20-35 parts of coupling-agent-modified attapulgite, 3-5 parts of activated zinc oxide, 4-9 parts of stearic acid, 10-18 parts of expansible graphite, 3-7 parts of copper oxide, 5-12 parts of ferric oxide, 5-9 parts of coupling-agent-modified ammonium polyphosphate, 3-6 parts of sulfur, 2-3.5 parts of tricresyl phosphate, 0.5-2 parts of oxidic polyethylene, 3.5-4.5 parts of an accelerant TMDT, 2-5 parts of an anti-aging agent, 1-2.8 parts of epoxy flaxseed oil and 1-1.8 parts of triethyl O-acetylcitrate. The weatherproof and wear-resisting cable sheath pipe has the advantages of good weather resistance, high wear resistance, good mechanical property and long service life.

The invention relates to the technical field of silicone rubber, and particularly relates to a ceramic fire-resistant and flame-retardant silicone rubber and a preparation method thereof. The ceramic fire-resistant and flame-retardant silicone rubber is composed of a component A and a component B in a weight ratio of 0.8-1.2: 1. The component A comprises the following raw materials in weight part: 60-140 parts of silicone rubber A, 35-45 parts of reinforcing agent, 60-100 parts of filler A, 11.4-17.2 parts of silane auxiliary agent A, 0.15-0.25 part of lubricant A, 0.1-0.3 part of flame retardant, and 0.5-1.5 parts of vulcanizing agent. The component B comprises the following raw materials in weight part: 60-140 parts of silicone rubber B, 230-290 parts of filler B, 3-6 parts of silane auxiliary agent B, and 0.2-0.4 part of lubricant B. According to the technical scheme of the invention, the ceramic fire-resistant and flame-retardant silicone rubber is good in fire-resistant and flame-retardant property, and excellent in comprehensive performance.

The invention discloses a graphene heat-conduction anticorrosion paint and a preparation method thereof, which belong to the field of paint preparation. The heat-conduction anticorrosion paint comprises the following components by mass percentage: 1-10 parts of graphene, 20-50 parts of epoxy resin, 15-30 parts of a basic filling material, 0.5-2 parts of a coupling agent, 0.5-2 parts of an antifoaming agent, 5-15 parts of a dispersant, and 5-20 parts of a solvent. The invention also discloses the method for preparing the graphene heat-conduction anticorrosion paint. Compared with the prior art, the graphene heat-conduction anticorrosion paint has excellent heat conduction performance and anticorrosion performance, and the preparation method of the graphene heat-conduction anticorrosion paint has the advantages of simple process, low cost, and wide application value.

The invention discloses a preparation method of a quantum dot membrane light-guide component and a corresponding backlight module, wherein the quantum dot membrane light-guide component includes a glass light-guide plate, a red quantum dot layer, a green quantum dot layer and a base layer arranged sequentially from the bottom to the top. The specific preparation of the quantum dot membrane light-guide component includes the steps of 1), preparing red quantum dot glue; 2) preparing green quantum dot glue; 3) using an applicator to apply the prepared green quantum dot glue to a base, forming a wet membrane; semi-curing the wet membrane with a UV (ultraviolet) curing device; 4) using the applicator to apply the red quantum dot glue to the semi-cured green quantum dot glue layer of step 3), covering with a protective membrane, and fully curing with the UV curing device. The preparation method has the advantages that the quantum dot membrane has higher blue light conversion efficiency and more stable fluorescent performance; the display effect is enhanced, the thickness of a QLCD (quantum-dot liquid crystal display) is decreased, and a product is lighter, thinner and more attractive.

The invention relates to a preservation-resisting energy bar which is prepared from the following raw materials in parts by weight: 1000-5000 parts of protein powder, 1500-3500 parts of syrupy, 500-1500 parts of a water-retaining agent, 200-1000 parts of lipid, 500-1000 parts of carbohydrate, 500-2000 parts of a cocoa butter or cocoa butter substitute product and 50-150 parts of pure water. The energy bar made by using the formula and the method provided by the invention is fine and smooth in taste, fragrant and sweet in flavor, convenient to carry over and unlikely to deteriorate and is particularly applicable to special purposes such as long-term wild sports and military training as certain moisture and soft taste are still maintained after being preserved for a long time.

The invention relates to a rinsing air purification technology and in particular relates to a cold-hot type rinsing air purification device using a multilayer staggered spray mode. The cold-hot type rinsing air purification device using the multilayer staggered spray method comprises a water storage tank, a spray tank, a water supply pipe, a water pump and an exhaust fan, wherein the water storage tank comprises a wastewater storage tank, a clear water storage tank, an electronic refrigerator, an electronic heater, an isolation plate and a wastewater filtration screen; the spray tank comprises a spray tank shell, a spray plate, a spray pipe, an air inlet, an air outlet and an air filtration screen; the spray plate, the spray pipe, the air inlet, the air outlet and the air filtration screen are arranged in a tank body; due to the adoption of the multilayer staggered spray method and a curve air flowing path, an equipment resource can be used to the greatest extent; air is fully sprayed and washed, so that the best purification effect can be achieved; the temperature of the air in a room can be adjusted according to the requirement during purifying of the air; the device can be used as an indoor moving air purifier, can be mounted on the wall to be used as an air purification window, and can be applied to spray purification towers for purifying industrial waste gas generated during waste incineration; the defects that a filter element is blocked and parts are frequently replaced can be avoided.

The invention discloses a fiber-reinforced phenolic resin-based composite material and a preparation method thereof. The preparation method comprises the following steps: firstly preparing phenolic resin modified by nano-clay, preparing an acid curing agent, adding the acid curing agent into the phenolic resin modified by the nano-clay and uniformly stirring to obtain resin liquid; and selecting a fiber reinforcing material, molding in a mold by a molding process, and then curing at low temperature to obtain the fiber-reinforced phenolic resin-based composite material. The fiber-reinforced phenolic resin-based composite material prepared by the preparation method disclosed by the invention is prepared by curing the phenolic resin at normal pressure and low temperature of 25 DEG C-80 DEG C, and the material is stable to a fire reaction and has no phenomena of surface bubbling, deformation, delamination and burst when meeting high heat. The material has excellent F / S / T performance, achieves 1a-grade level of a BS6853 test and further has excellent performances of high mechanical strength, good fatigue resistance, heat resistance, resistance to strong acid corrosion and the like.

The invention discloses a method of preventing a metal eutectic bonding alloy from overflowing. The method comprises the steps of: firstly manufacturing a first bonding metal graph on a device substrate of a first device structure and manufacturing device protecting structure based on the first bonding metal graph, wherein the device protecting structure comprises a first groove-shaped cavity and the bottom of the first groove-shaped cavity is the first bonding metal graph; and then manufacturing a second bonding metal graph on a second device structure and performing metal eutectic bonding on the first device structure and the second device structure in the first groove-shaped cavity. The device protecting structure comprises the first grooved structure, the overflowed liquid alloy can flow into the first groove-shaped cavity in the metal eutectic bonding process, and the overflowed liquid alloy can be obstructed and cannot roll freely, so that the overflowed liquid alloy is effectively prevented from diffusing to the device structure area. According to the invention, the airtight level of the metal bonding is increased, and the yield rate of MEMS device production and manufacturing is improved.

The invention relates to a needle used for puncturing and positioning a pulmonary nodule. The needle comprises a stylet and a sleeve, wherein the sleeve is a hollow cavity of which both ends are opened; one end of the stylet is provided with a hook-shaped structure which is restrained in the sleeve to realize contraction; and the other end of the stylet extends out of the sleeve, and a thickening part is arranged on the stylet and positioned in the sleeve. When the needle used for puncturing and positioning a pulmonary nodule, which is provided by the invention, is used, the needle used for puncturing and positioning a pulmonary nodule has the advantages of accurate positioning and difficult fall-off, and due to the improvement of the structure, pneumothorax is not easily caused in an operation process, so that necessary time is provided for an operator to accurately positioning a focus, and secondary injuries caused by repeated puncturing to a patient are avoided; and meanwhile, the risk of bringing the secondary injuries to the patient is also eliminated by a fixing device at the tail part of the stylet.

The present invention relates to a bamboo fiber-reinforced material and a preparation method therefor. The bamboo fiber-reinforced material is prepared from the following components in parts by weight: 100 parts of polypropylene, 20-40 parts of bamboo fiber, 5-10 parts of a flexibilizer, 2-8 parts of a compatibilizer, 0.5-5 parts of an organic antibacterial agent, 5-20 parts of an inorganic antibacterial agent; 0.4-2.5 parts of coupling agent, 3-8 parts of a plasticizer, and 0.5-2 parts of an antioxidant. The bamboo fiber-reinforced material provided by the present invention uses the bamboo fiber that is high in an aspect ratio and has a certain antibacterial action as a reinforcing material. The bamboo fiber is matched with the inorganic antibacterial agent, the organic antibacterial agent, the plasticizer and other auxiliaries, so that the mechanical property of the bamboo fiber-reinforced material is improved, and simultaneously the material has a relatively good antibacterial property. The bamboo fiber-reinforced material provided by the present invention solves the problem that bamboo fiber-reinforced plastic is easily eroded and degraded by bacteria during long-term use, and the prepared bamboo fiber-reinforced material is relatively high in mechanical strength and antibacterial property.

The invention relates to an anti-bacterial PVC material and a preparation method thereof. The anti-bacterial PVC material is prepared from, by weight, 100 parts of PVC, 2-5 parts of a stabilizer, 0.2-0.8 parts of a lubricant, 1-5 parts of a compatibilizer, 0.4-1.5 parts of a coupling agent, 2-8 parts of a plasticizer, 0.5-4 parts of an organic antibacterial agent and 8-25 parts of an inorganic antibacterial agent. In the design of the material, characters of the PVC material is fully considered, so that by means of the antibacterial plasticizer, with combination of the organic antibacterial agent and the inorganic antibacterial agent, mechanical performances of the PVC material is maintained and the antibacterial effect of the material is improved.

The invention discloses a method and catalyst for preparing high cis-polybutadiene by gas-phase polymerization. The catalyst is mixed by five components, wherein the first component is a rare-earth compound; the second component is alkyl aluminum, alkyl aluminium hydride or alkylaluminoxane; the third component is alkyl chloride or alkyl aluminum chloride; the fourth component is magnesium chloride, silicon dioxide, carbon black or aluminum oxide; the fifth component is any one or combination of more of nano silicon dioxide, nano carbon black, nano aluminum oxide, nano titanium dioxide, nano antimony trioxide, nano calcium carbonate, nano talcum powder and nano montmorillonite; and the mol ratio of the first component to the second component is 1:(20-100), the mol ratio of the first component to the third component is 1:(1-10), the ratio of the molar weight of the first component to the mass of the fourth component is 1:(2000-200000), and the mass ratio of the fifth component to the fourth is 1:(0.125-200). Butadiene and a catalyst are subjected to gas-phase polymerization reaction at 40-70 DEG C for more than 30 minutes to obtain the high cis-1,4-polybutadiene rubber particles.

The invention discloses a method for blasting a big boulder in an artificially dug pile, which can prevent broken stones from flying around and comprises the following steps: a, drilling a plurality of blast holes in the big boulder; b, placing detonators and explosive in the blast holes; c, connecting the detonators in parallel, connecting the detonators with a head lead, leading the head lead out of an artificially dug pile well, and connecting the head lead with a detonating primer; d, arranging a broken stone separating layer in the artificially dug pile well; e, pressing the detonating primer down to detonate and clear blasted stones; and f, repeating steps from step a to step e until the big boulder in the artificially dug pile is completely dismantled. Because the broken stone separating layer is arranged in the artificially dug pile well, in a blasting process, the broken stone separating layer can obstruct the blasted stones and prevent the potential safety hazard caused when the broken stones fly out of the artificially dug pile well. The method is suitable for popularization and application on occasion when big boulders need to be dismantled in artificially dug piles of various construction works.

The invention relates to a heat exchange component, in particular to a double-wall multi-head spiral corrugated metal pipe used for a heat exchanger and a machining method thereof. The pipe body comprises an inner pipe body and an outer pipe body; the outer pipe is a spiral corrugated pipe, while the inner pipe is a smooth pipe or a spiral corrugated pipe; and a gap is arranged between the inner pipe wall and the outer pipe wall. The invention mainly provides a durable double-wall spiral corrugated metal pipe which has simple structure, high heat exchange efficiency and high safety coefficient, and a machining method thereof so as to solve the technical problems in the prior art that the metal pipe in the existing heat exchanger is single-layered and has low safety factor and heat exchange efficiency.

The present invention relates to a novel preparation method of a nylon 12 composite, which comprises technical steps as follows: (1). 20 to 40wt percent of polyolefin is added into melted nylon 12 monomer to be dispersed by stirring; (2). 0.5 to 2w percent of montmorillonite is dispersed into the melted nylon 12 monomer; (3). after the two materials are mixed, 0.5 to 2wt percent of initiator and 0.5 to 2wt percent of cocatalyst are added for the anionic ring-opening polymerization of the monomer to obtain the composite. Compared with the prior art, the present invention has the characteristics of simple technology, short flow, high efficiency, no pollution, etc.

The invention discloses an oil-resistant low-smoke halogen-free flame-retardant flexible polyurethane cable material and a preparation method thereof. In the preparation method, polyol and polyisocyanate are applied to react, wherein the R value is controlled to be 2.05-2.45, and a polyurethane prepolymer with a certain molecular weight and isocyanate groups at the two ends is synthesized. The synthesized isocyanate-terminated polyurethane prepolymer is mixed with white carbon black, a flame retardant and a mineral filler, and functional inorganic particles, with polyurethane as a soft shell and filler as a hard core, are formed through a physical dispersion effect and a mechanical force chemical reaction. The hardness of the polyurethane cable material can be reduced, and the flexibilityand oil resistance of the polyurethane cable material are improved. According to the cable material, a multi-layer network structure is formed through irradiation crosslinking and secondary vulcanization processes, so that the mechanical property of the material is improved, and the size shrinkage rate of the material in the forming process is reduced. The cable material can be used for manufacturing insulation and sheaths of low-smoke halogen-free flame-retardant cables, flexible special cables, new energy automobiles and Chinese standard motor train unit lighting wires.

The invention discloses a method of anti-leak treatment on a petroleum drilling place by adopting a composite geo-membrane, relating to the technical field of adopting composite geotechnical materials to treat leakage of the petroleum drilling place. The method comprises the following steps of firstly, leveling the place; secondly, paving the composite geo-membrane; thirdly, paving a leakage pipeline: arranging the leakage pipeline at a position of easily having leakage; fourthly, paving a lime-ash stabilizing layer: with crushed stones, lime and fly ash as raw materials, paving the lime-ash stabilizing layer on the composite geo-membrane, wherein the lime-ash stabilizing layer comprise the following raw materials in percentage by weight, calculated by occupying the total volume of the raw materials: 8-10 percent of the lime, 10-12 percent of the fly ash and the balance of the crushed stones; and fifthly, paving a crushed stone surface layer: paving a 8-10cm crushed stone surface layer on the lime-ash stabilizing layer. By adopting the invention, waste mud and waste liquid of petroleum can be prevented from polluting the drilling place to enable idle land after drilling to be in second plowing, thereby having the effects of protecting land resources and lowering the land using cost.

The invention discloses a method for preparing high cis-polyisoprene through utilizing gas phase polymerization, and a catalyst. The catalyst is composed of five components comprising a first component, a second component, a third component, a fourth component and a fifth component, wherein the first component is a rare earth compound; the second component is anyone of aluminum alkyl, aluminum alkyl hydroxide and alkyl aluminoxane; the third component is anyone of alkyl chloride or aluminum alkyl chloride; the fourth component is magnesium chloride, silica, carbon black or alumina; the fifth component is anyone or a mixture containing several of nanometer silica, nanometer carbon black, nanometer alumina, nanometer titanium dioxde, nanometer antimonony oxide, nanometer calcium carbonate, nanometer talcum powder and nanometer montmorillonite; and the molar ratio of the first component to the second component is 1:20-100, the molar ratio of the first component to the third component is 1:1-10, the ratio of the mole of the first component to the mass of the fourth component is 1:2000-200000, and the mass ratio of the fifth component to the fourth component is 1:0.125-200. High cis-polyisoprene rubber particles are obtained through the gas phase polymerization of isoprene and the catalyst at 40-70DEG C for above 30min.

The invention discloses a biomass particle furnace which comprises a shell, a feeding device (1), a combustion device (2), a water circulation system, a control system (3) and an operation panel; thefeeding device (1) and a box body (21) of the combustion device (2) are both in a cylinder shape and rotate perpendicular to the ground plane by taking shafts of cylinders as rotation axes; an unloading groove (12) is divided into a plurality of unloading bins (122) by unloading bin partition plates (121); the box body (21) of the combustion device (2) is divided into 3-12 combustion cavities (211) by combustion cavity side walls (2111); openings of the unloading bins (122) and the combustion cavities (211) all face outwards; and the lower side of an outlet of an unloading passage (13) of thefeeding device (1) is the uppermost position of the box body (21). The invention provides the biomass densified biofuel combustion furnace which is automatic in unloading without blocking, full in combustion, timely in cleaning cokes and dust, efficient in running and relatively long in service life.

The invention relates to a silicone rubber composite material capable of undergoing ceramization and a preparation method thereof. The material comprises the following components in parts by weight: 25-35 parts of silicone rubber, 15-20 parts of aluminium hydroxide, 20-25 parts of ammonium polyphosphate, 25-30 parts of clay minerals with layered structures and 0.3-0.6 part of vulcanizing agent. The preparation method of the material comprises the following steps: mixing the materials in an open mill or an internal mixer uniformly, carrying out primary vulcanization moulding in a compression moulding press and carrying out secondary vulcanization in a forced air drying oven. The silicone rubber composite material capable of undergoing ceramization has the main characteristics that the product formed in a wide temperature range of 200-1000 DEG C has self-supporting property and can be used in the field of flame retardance and fireproofing. The silicone rubber composite material capable of undergoing ceramization is simple to prepare and easy to machine-moulded, can adopt existing rubber product machining and preparation equipment, is convenient to produce industrially and has an extensive application prospect.

The invention discloses organic montmorillonite and application thereof. The organic montmorillonite is obtained by modifying montmorillonite so that adhesives can be prepared, wherein the organic montmorillonite has effects on gel protection and emulsification in the copolymerization process of vinyl acetate. Layered montmorillonite is dispersed in a polymer matrix and has the advantages of being high in storage stability, uniform in dispersion and high in interface bonding strength. Meanwhile, montmorillonite belongs to inorganic flame retardant and has the advantages of being excellent in mechanical performance, gas barrier property and fire retarding effect, low in cost, convenient to machine and the like, the mechanical performance of polymers is improved, and a new approach is created for polymer fire retardance.

The invention discloses a preparation method of a graphene supported fullerene hybrid material and an application of the hybrid material in polymer flame retardation. Through amine compounds, fullerene is load on the surface of graphene oxide through chemical bonds to prepare the graphene supported fullerene hybrid material. At the same time, the hybrid material is compounded with polymers through solution blending and direct blending; the flame retardant performance of polymers is obviously enhanced by the sheet obstruction effect and enhancing effect of graphite and the free radical absorption effect of fullerene; and the mechanical properties of polymers are strengthened at the same time.

The invention discloses a polypropylene modified sound insulation composite material and a preparation method thereof. The polypropylene modified sound insulation composite material comprises, in weight percent, 33.8%-88.8% of polypropylene, 10%-60% of modified talcum powder, 0.2% -2% of antioxidants and 1%-6% of additives. The composite material mainly takes the modified talcum powder as a raw material, the modified talcum powder after intercalation modification in a supercritical carbon dioxide state is of a laminated structure in a polypropylene substrate, polymer macromolecules easily enter in the production process of the modified talcum powder, the stripping degree of the modified talcum powder in polypropylene is greatly improved, the reflection frequency of the same weight parts oftalcum powder for sound waves is increased, the composite material has excellent sound insulation effects and better stiffness increasing effects, and sound absorption and sound insulation performances of the composite material are improved.

The invention provides fire-resistant silicone rubber. The fire-resistant silicone rubber comprises the following raw materials: silicone rubber, white carbon black, glass fiber, glass beads, aluminumhydroxide, magnesium hydroxide, copper oxide, a heat stabilize, refractory fillers, a vulcanizing agent, a catalyst and hydroxyl silicone oil, wherein the catalyst takes carbon black as a carrier andtakes palladium, tungsten and platinum as active components, and the mass ratio of the palladium to the tungsten to the platinum to the carbon black is 1:2:5:100; the refractory fillers comprise quartz sand, mica powder, talcum powder and basalt; and the heat stabilizer comprises calcium carbonate, magnesium stearate, calcium stearate, zinc oxide and phosphite ester. The sources of the raw materials are wide, the preparation method is simple, the cost is low, and the prepared silicone rubber has high fire-resistant and flame-retardant properties and can be widely applied.

The invention discloses a fruit tree pollinator, which comprises a spray gun. The spray gun is provided with a pollen bottle, and the front end of the spray gun is equipped with a pollen cover. The spray gun comprises a gun body, a handle, a pollen discharge casing pipe and a pollen discharge slip pipe. The pollen bottle comprises an upper pollen bottle and a lower pollen bottle. One side of the lower end of the gun body is connected with the handle. A pollen spray chamber is horizontally arranged inside the gun body. The pollen discharge casing pipe is arranged at the front end of the gun body. The pollen discharge slip pipe is connected with the pollen discharge casing pipe. The upper pollen bottle is communicated with the pollen spray chamber through a blanking hole. a motor is arrangedinside the pollen spray chamber. A rotating shaft is equipped with fan blades and a pollen deflector rod. The lower pollen bottle is disposed at the lower end of the gun body. A battery is disposed inside the handle. The front end of the handle is equipped with an air cylinder, which is provided with a compression plate. The air cylinder is communicated with the lower pollen bottle through a bulged pipe. A pollen receiving pipe is arranged inside the pollen discharge casing pipe. One end of the pollen receiving pipe is communicated with the lower pollen bottle. A connecting pipe is mounted inside the pollen discharge slip pipe, and one end of the connecting pipe is connected with the pollen receiving pipe.

The invention discloses a silicone rubber foam material suitable for cultural relic liner protection and a preparation method of the silicone rubber foam material. The silicone rubber foam material is prepared from the following materials in parts by weight: 100 parts of liquid silicone rubber containing hydroxyl groups, 0-40 parts of a reinforcing agent, 0-10 parts of a blowing promoter, 0.2-0.6 part of an inhibitor, 0.3-0.8 part of a catalyst and 3-20 parts of hydrogen-containing silicone oil. The silicone rubber foam material does not release a harmful gas to cultural relics, and can play a blocking role on cultural relics and packaging materials; and the damages to the cultural relics caused by released substances of the packaging materials are reduced. The preparation method disclosed by the invention is controllable in condition, simple in technology and environmentally friendly.