106results about How to "No burst" patented technology

The invention discloses a heat resistant lubricant used for drawing refractory metal and a preparation method thereof. The heat resistant lubricant comprises the following components by weight: 10-30% of graphite, 0.1-2% of dispersant, 0.3-5% of thickening agent, 0.1-15% of emulsifier, 0.5-10% of film forming agent, 2-5% of ammoniacal liquor with concentration of 25%, 0.1-1% of antiseptic, 0.1-2% of adhesive, 0.3-3% of surfactant and balance of water. The heat resistant lubricant has good adhesive force under high temperature and can not generate explosion and shedding, lubricity, thermal conductivity and surface antioxidation performance between the drawing material and a mold can be effectively increased, heat due to friction can be reduced, and usage life of the mold can be prolonged.

The invention discloses a high-temperature wear-resistance brick, which is prepared from a raw material comprising the following chemical components in form of oxide in part by weight: 70 to 75 parts of Al2O3, 17 to 22 parts of SiO2, 5 to 7 parts of ZrO2 and Hf2O, 0.9 and 1.2 parts of Na2O, and 0 to 5 parts of Fe2O3, TiO2, CaO and MgO. The crystalline phase of the product consists of 38 to 45 percent of corundum, 38 to 45 percent of mullite, 5 to 7 percent of monoclinic zirconia and the balance of a glass phase. The refractoriness of the high-temperature wear-resistance brick prepared by the invention is above 1,750 DEG C, the pressure strength of the high-temperature wear-resistance brick is over 250MPa, and the high-temperature wear-resistance brick can be well used on a part where a wear-resistance and high-temperature-resistance material is required, and particularly the high-temperature wear-resistance brick can be used for building liner of a rotary calcining furnace to greatly improve the service life and economic benefit of the rotary calcining furnace. The invention also discloses a casting method of the high-temperature wear-resistance brick.

The invention discloses an energetic material thermal stability and thermal safety test device and an energetic material thermal stability and thermal safety test method. The device comprises a constant-temperature bath used for placing test tubes and used for providing a constant temperature, a color sensor used for acquiring test tube image information, and a computer and a PLC used for controlling the work of the device. When the test is carried out, the device is started; a temperature and a motor rotation speed are set; a sample is placed in a test tube; and test can be started. With the device provided by the invention, a test staff is completely isolated from the device, such that the safety of the test staff is ensured. Also, the test is not influenced by lights and the human factors of the test staff, such that test result is more accurate. The device is completely practical, and has high automation degree. A good test device is provided for the thermal stability and thermal safety of an energetic material.

The invention discloses a method for preparing a back fully-passivated contact solar cell by utilizing tubular PECVD and the back fully-passivated contact solar cell. The method comprises the steps of carrying out pre-cleaning, double-sided texturing, front boron diffusion, front laser selective doping, secondary cleaning and back polishing on a silicon wafer; depositing a silicon dioxide thin film layer and a phosphorus-doped amorphous silicon carbide thin film layer on the back surface of the tubular PECVD equipment, and performing annealing treatment to convert amorphous silicon carbide into microcrystalline silicon carbide; depositing an Al2O3 passivation layer and an antireflection layer; and performing silk-screen printing and sintering to obtain the back fully-passivated contact solar cell. The method disclosed by the invention has the advantages of simple process, convenience in operation, low cost, good compatibility with the existing production line, good preparation controllability, high preparation efficiency, good safety and the like, can be used for preparing the high-efficiency back fully-passivated contact solar cell, is suitable for large-scale preparation, is beneficial to industrial application, and has a very high use value and a very good application prospect.

The invention belongs to the technical field of aero-engine and gas turbine cooling, and relates to a laminate cooling structure adopting polygonal turbulent flow columns. The laminate cooling structure comprises an air inlet hole positioned in an air inlet plate, an air outlet hole positioned in an air outlet plate, the turbulent flow columns and a spiral cavity, wherein the turbulent flow columns are positioned in the center of the spiral cavity and form a cold air channel, and the number of the edges of the turbulent flow columns is any one of 3, 4, 5, 6 to n; the cross sections of the airinlet hole and the air outlet hole are in a parallelogram shape, the air inlet hole and the air outlet hole are smoothly connected with the channel in the spiral cavity through an arc-shaped sliding way, and the air inlet hole and the air outlet hole extend outwards from the two adjacent edges of the polygonal turbulent flow columns; and the included angles between the center line of the air inlethole and the horizontal plane and between the center line of the air outlet hole and the horizontal plane are an incident angle A1 and an emergent angle A2 correspondingly, and the incident angle A1and the emergent angle A2 are acute angles. According to the laminate cooling structure, the spiral cavities which are adjacent in space but do not interfere with each other avoid impact and mixing ofcooling airflow in a laminate, so that the flow resistance and the flow loss can be reduced, and the flow resistance loss is greatly reduced.

The invention discloses a photovoltaic inverter and a power-on self-testing method of the photovoltaic inverter. The power-on self-testing method includes the steps that a direct-current-side on-off control module is added on the direct-current side of the photovoltaic inverter, wherein the direct-current-side on-off control module comprises a soft start on-off element, a soft start resistor, a partial voltage on-off element and a partial voltage resistor, the soft start on-off element and the soft start resistor are connected in series, and the partial voltage on-off element and the partial voltage resistor are connected in series; when the soft start on-off element and the partial voltage on-off element are closed, the soft start resistor is connected with the partial voltage resistor in series, a main on-off element and an alternating-current on-off element of the photovoltaic inverter are controlled to be kept in an off state, the main on-off element is located on the direct-current side of the photovoltaic inverter, and the alternating-current on-off element is located between an inverter bridge of the photovoltaic inverter and a power grid. Through the partial voltage resistor, input voltage is kept in a low-voltage and low-current state, so that due to the low voltage and the low current, even if the inverter bridge has short circuit or other faults, the inverter bridge does not explode with a big sound.

The invention discloses a combined crimping device of a corrugated case print fluting machine. The combined crimping device comprises a preliminary pre-pressing wheel set and a crimping and forming wheel set, wherein the preliminary pre-pressing wheel set comprises a preliminary pre-pressing upper wheel and a preliminary pre-pressing lower wheel which have a plane-to-plane structure; the crimping and forming wheel set comprises a moderate crimping upper wheel of a plane-to-recess structure, a moderate crimping lower wheel, and a main crimping and forming upper wheel and a main crimping and forming lower wheel of a recess-to-bump structure; or the crimping and forming wheel set only comprises a main crimping and forming upper wheel and a main crimping and forming lower wheel of a recess-to-three-bump structure; each wheel is arranged on a corresponding shaft through a wheel seat; each wheel seat is provided with a shift fork groove; and a shift fork is arranged in the shift fork groove. By using the combined crimping device provided by the invention, a crimped case does not crack, wrinkles are not produced inside a crimping line, the crimping line is accurate in positioning and no deflection and displacement are guaranteed, the case quality is improved, and the production cost is effectively reduced; crimping, fluting and central positioning of the print fluting equipment are performed in parallel; synchronous linkage and adjustment are realized; and the combined crimping device is easy and convenient to operate.

The invention relates to a high-performance concrete capable of resisting high-temperature cracking. The concrete comprises the following components according to a content: 300-600 kg / m<3> of cement, 100-200 kg / m<3> of limestone powder, 1-2 kg / m<3> of polypropylene fiber, 150-200 kg / m<3> of water, 700-1200 kg / m<3> of limestone coarse aggregate, and high-efficiency polycarboxylic acid water reducing agent the amount of which is 1.0-1.4% that of cement, wherein the sand ratio is 40-50%. The concrete does not crack at high temperature or in fire, thereby solving the problems of poor cracking resistance of common, high-strength or high-performance concrete; the excellent working performance of the concrete provides convenience for construction; and good durability of the concrete improves service performance and safety stock of a structure, thus certain safety guarantee is provided for rescue working in fire and after fire, and the concrete has obvious economic benefits and social benefits.

The invention discloses a high-quality alloy tool steel 42 CrMo4 quenched and tempered steel plate. The high-quality alloy tool steel 42 CrMo4 quenched and tempered steel plate is subjected to KR molten iron pretreatment, converter smelting, argon blowing treatment, LF refining, VD refining, continuous casting, heating, rolling, stack cooling, heat treatment, on the basis of ensuring that the customer requires 42 CrMo4 components, harmful elements such as P and S in the steel are strictly controlled in the smelting process, and the purity of the molten steel is guaranteed to basically reach the level of a clean steel. In the rolling process, high-temperature low-speed and heavy reduction uniform tissues are adopted, so that the quality of the flaw detection is ensured; the harmful gas in the steel plate is diffused through the high-temperature stack cooling, and the flaw detection is consolidated; the steel plate is subjected to high-temperature tempering treatment at 730 DEG c beforethe steel plate is subjected to thermal refining in order to prevent the steel plate from being subjected to fire cutting and aging cracking; the macro quality of steelmaking is controlled to reach the grade c of 0.5 grades, the good macro quality ensures that the steel plate cannot be cracked after the steel plate is quenched, and finally the performance of the 42 CrMo4 steel plate with the customer requirement is obtained through proper tempering temperature.

This invention relates to high-performance and anti-crack self-tight fiber-containing concrete used for tunnels, architectures and bridges. The self-tight concrete has good anti-crack property, and can improve the mechanical properties and deformation properties deformation properties of the structures when subjected to fire or high temperatures. This invention uses high-strength and high-modulus steel fiber and low-melting-point synthetic fiber as the additives, which are combined with high-efficiency water-reducer to prepare the self-tight concrete. The self-tight concrete has such advantages as low cost, high safety, no crack at high temperatures, high residual compressive strength and bending strength after fire or high temperatures, and no smashing during construction.

The invention discloses a drainage pipeline plug preventing people from going down into a well for inspection and a using method thereof. The drainage pipeline plug and the using method are mainly used in transformation, emergency maintenance, dredging and the like of municipal drainage pipelines. The drainage pipeline plug comprises a section of main tube body, wherein a nut base and a screw are arranged on the upper end portion of the main tube body, a movable operation turnplate is arranged at the upper end head of the screw, and the lower end head of the screw is in butt joint with a connector in the middle of the upper end head of the connection rod; parallelogram mechanisms are symmetrically arranged on two sides of the lower portion of the main tube body, each parallelogram mechanism comprises an upper support arm, a lower support arm and a sealing plate connection base, and a sealing plate is arranged on the sealing plate connection base; and the lower portion of the connection rod penetrates out of the main tube body, ejector rods are symmetrically hinged to two sides of the lower end of the connection rod, and the other ends of the ejector rods are hinged to the middle portions of the lower support arms of the parallelogram mechanisms. The drainage pipeline plug is safe and reliable, easy and convenient to operate, low in manufacturing cost and long in service life, and capable of effectively avoiding casualty accidents caused by the fact that construction staff going down into the well for operation inhale poisonous gases and has large market values and using values.

The invention relates to a production technology of glass milk bottles, in particular to a production technology of cold and thermal impact resistant glass milk bottles. The production technology comprises the following steps: tube wiping and material feeding, tube plugging, material cutting, perforation, preliminary necking, preliminary molding, final molding, length fixing, bottle bottom preparation, annealing and finished product preparation. According to the production technology of the cold and thermal impact resistant glass milk bottles, a milk bottle production enterprise can perform standardized production according to the technical scheme disclosed by the invention, and a high borosilicate glass milk bottle produced by the production technology cannot explode under sudden change of temperature and has the advantages of being high in transparency, easy to clean and the like.

The invention discloses a polyester coating. The polyester coating comprises first polyester resin, second polyester resin, amino resin, coloring pigment and aids, wherein the pigment / binder ratio of the polyester coating is 0.7-1.3, the polyester-amino ratio is 3-8, and a conventional dosage of aids is used; the molecular weight of the first polyester resin is 5,000-7,000, the hydroxyl value is 6-35 mgKOH / g, the acid value is smaller than or equal to 5 mgKOH / g, and the glass transition temperature (Tg) ranges from 20 DEG C to 45 DEG C; the molecular weight of the second polyester resin is 5,000-7,000, the hydroxyl value is 3-15 mgKOH / g, the acid value is smaller than or equal to 5 mgKOH / g, and the glass transition temperature ranges from subzero 10 DEG C to 10 DEG C. The invention further discloses a preparation method of the polyester coating. A coating film of the polyester coating has good flexibility, good adhesion to a substrate and good chemical resistance, hardness, scratch resistance and other properties.

The invention relates to a preparation method of syringopicroside (SYR) poly(lactide-co-glycolide) (PLGA) nanoparticles. The preparation method comprises the following steps of: weighing SYR and dissolving SYR into distilled water to serve as an internal aqueous phase; weighing PLGA and dissolving PLGA into an organic solvent consisting of ethyl acetate and dichloromethane to serve as an organic phase; slowly adding the aqueous phase into the organic phase dropwise under magnetic stirring and performing ultrasonic treatment in ice-water bath to obtain SYR primary emulsion (W / O); injecting the prepared primary emulsion into an aqueous phase containing an emulsifier poloxamer188 and stirring to form SYR primary multiple emulsion; quickly injecting the multiple emulsion into an external aqueous phase solution comprising poloxamer188, rotationally evaporating the multiple emulsion at a certain temperature and under reduced pressure until the mixed solvent of the ethyl acetate and the dichloromethane is volatilized completely to obtain a nanoparticle colloidal solution; freeze-drying to obtain the SYR-PLGA nanoparticles. The SYR-PLGA nanoparticles prepared by the method can be used for improving the stability of the SYR, prolonging the drug action time, overcoming the defect of high metabolism velocity, most importantly, achieving targeted and slow-release effects, and improving the bioavailability.

The present invention relates to a production process of a glass feeding bottle, specifically a production process of a high borosilicate glass feeding bottle, comprising the following steps: raw material detection, raw material distribution, mold manufacturing, bottle making, body bending, printing, annealing, Applique, baking, inspection and packaging, finished product storage, the invention provides a production process of high borosilicate glass baby bottles, so that baby bottle manufacturers can standardize production according to the technical scheme disclosed in the invention, and use the high boron silicon glass produced by the invention Silicone glass baby bottles can withstand sudden temperature changes without bursting, have high transparency and are easy to clean.

The invention discloses a preparation method and application of a coated lightweight aggregate, and belongs to the field of a concrete preparation technology. According to the invention, an alkali-activator solution, industrial waste residue and lightweight aggregate are used as raw materials to prepare the coated lightweight aggregate. Under high temperature effect of 1200 DEG C for 10 hours, concrete prepared from the coated lightweight aggregate prepared by the method provided by the invention has no crack phenomenon, and there is 30-40% residual mechanical strength. The concrete has characteristics of low cost, excellent high temperature resistance and the like. The coated lightweight aggregate can be applied to foundational facilities construction of high-temperature operations such as smelting, oil exploitation, nucleus and the like and sprayed on the surface of a general concrete structure as a fire protection layer.

The invention discloses a curcumin particle suspension having a slow release effect used for intramuscular injection and hypodermic injection, and a method for preparing the suspension used for injection. An auxiliary material of the curcumin particle suspension used for injection contains no solubilizer or cosolvent, the security is good; the curcumin particle suspension can reach slow release effect through hypodermic and intramuscular injection administration, the stability of the curcumin particle suspension is good, and the curcumin particle suspension can be used in industry.

The invention relates to an energy accumulator leather bag on-line replacing device which is characterized in that the energy accumulator leather bag on-line replacing device comprises an air extracting and inflating device, an energy accumulator assembly, a guiding rod, bag edges and a rope; and the air extracting and inflating device is arranged on the energy accumulator assembly, and the guiding rod is used for guiding radial penetrating of the rope. According to the technical scheme, the use effect is good, safety and reliability are achieved, the environmental destruction accidents such as leather bag bursting and hydraulic oil leakage cannot occur, and energy conservation and environmental friendliness are achieved accordingly.

The invention relates to a controllably biodegradable poly(lactic-co-glycolic acid) (PLGA) bore gradient membrane and a preparation process thereof. The PLGA bore gradient membrane is of a central symmetrical structure with smooth external and porous internal and is formed by sequentially arranging and pressing seven layers of equant and thickness-equal films having thickness of 10-50 microns: PLGA 5050 FILM, porous PLGA6535film, porous PLGA7525film, porous PLGA8515film, porous PLGA7525 film, porous PLGA6535film and PLGA5050film. Compared with the prior art, the PLGA bore gradient membrane is smooth in surface and porous in internal; the mass percent content of the monomer from outside to inside (to half thickness) is distributed in gradient manner; the sudden-drop of the mass of the PLGA in the degradation process is overcome, the integral degradation curve is gentle and stable and free from sudden-drop; the degradation process is properly accelerated due to the existence of the bore, the degradation speed of the finished product is controllable, the mechanical strength is high, the method is simple and easy to operate, the obtained product is stable in quality and wide in application prospect.

The invention relates to a high-thermal-conductivity metal circuit board production method. The method includes 1, clipping a copper-clad plate; 2, grinding the plate; 3, printing the circuits; 2, detecting for the first time; 5, etching, namely placing the copper-clad plate with the printed circuit into etching equipment, utilizing etching potion to corrode the excess copper skin, washing the ink of the circuits, and drying; 6, drilling positioning holes; 7, washing for the first time; 8, printing silkscreen lines, printing designed circuit patterns on the back of a substrate, removing the exposed copper foil of the substrate by etching, then removing the protection ink; 9, washing for the second time; 10, welding in a resistant manner; 11, forming; 12, forming V pits; 13, detecting for the second time; 14, packing and discharging. The method has the advantages that the production process is simple, the heat conducting efficiency is high, and the metal substrate is not prone to drop off, and the method is environment-friendly.

The invention discloses a desulfurized gypsum light through-pore ceramsite. According to the technical scheme, the desulfurized gypsum light through-pore ceramsite is characterized by being prepared from desulfurized gypsum, high-viscosity attapulgite, a powdery attapulgite foaming agent, activated clay residues, floating beads, light magnesium oxide, expanded perlite, expanded vermiculite and quick lime. The materials of the desulfurized gypsum light through-pore ceramsite are subjected to stirring and mixing, extruding granulation, drying, roasting, heat preservation and screening, and then packaged into the desulfurized gypsum light through-pore ceramsite in a sealed mode. The desulfurized gypsum light through-pore ceramsite has the advantages that the desulfurized gypsum light through-pore ceramsite is large in specific area, small in bulk density, high in water absorption, excellent in breathability, attractive in appearance molding, free of peculiar smells, light and good in strength, and micropores and macropores are integrated; when the desulfurized gypsum light through-pore ceramsite is used for culturing or planting various nursery stocks, flowers and vegetables, the roots of plants can absorb water or nutritional ingredients of liquid fertilizer from the desulfurized gypsum light through-pore ceramsite, and thus it is ensured that the plants grow and develop well and are high in survival rate; the desulfurized gypsum light through-pore ceramsite is suitable for preparing soilless culture media and nutrient soil.

The invention discloses an ointment combination matrix for sustained-release drug delivery, and belongs to the technical field of a medicine preparation. The ointment combination matrix contains a hydrophilic surfactant, a cellulose derivative, glyceryl behenate and vaseline, wherein the matrix is ground and mixed with the medicine to prepare the ointment; the ointment is swelled under in vitro release conditions of 37 DEG C and 100rpm; the medicine is kept to release at zero level or similar zero level for a long period of time; vaseline is good in adaptability to body tissues, and has the effect of promoting wound healing; the hydrophilic surfactant absorbs body liquid, so that the combination matrix is swelled and a drug release channel can be formed; the glyceryl behenate is good in biocompatibility; the thermal stability is increased; and matrix dissolution is avoided and release of the drug is promoted due to an adhesive effect of the cellulose derivative. The ointment is suitable for dosing normal or damaged tissues, pollution and cleaning of corroded matters are avoided, the drug frequency is reduced, the medication compliance of a patient is improved, and the ointment is a sustained-release ointment preparation applied to skin, oral cavities, rectums, vaginas and the like.

The invention discloses an epoxy resin material with strong corrosion resistance, and a method for preparing an integral core-penetrating plate by using the same. The epoxy resin material comprises the following components: an epoxy resin matrix, an epoxy resin curing agent, quartz sand, an epoxy resin diluent, a coupling agent and color paste. The method for preparing the core-penetrating plate comprises the following steps: pre-heating the epoxy resin matrix, the epoxy resin curing agent and the quartz sand, respectively; putting the pre-heated epoxy resin matrix in a pre-heated reaction kettle, adding the pre-heated quartz sand with half in weight, stirring the mixture, and then inputting the pre-heated epoxy resin curing agent and residual quartz sand; after stirring the mixture, inputting the epoxy resin diluent and the color paste; and after stirring the mixture, inputting a crosslinking agent, injecting the mixture into a pre-heated die after reaction, isolating heat and carrying out crystallization and deforming reactions sequentially, then reducing the temperature to 170-200 DEG C and preserving the temperature for 3-4 hours, and finally, cooling the mixture to room temperature to obtain a product. The product disclosed by the invention is durable. If damages are produced on the surface, the product can be directly repaired like a new one.

The invention relates to a wood compounded material, comprising by weight 20-40% of Manila sand slurry, 20-40% of wood slurry, 20-40% of chemical fiber which is vinylon and 3-10% of bonding fibre which is water miscible PVA. The production technology of the wood compounded material contains 1) beating by beater, 2) joining 1-% of PEO in drainer, 3) drying that original paper is formed by drying in dryer after forming in oblique graticule forming container, 4) coating by coater two times after loosening and it is cut into finish product by splitting machine. There are the merits that it is provided with adjacent crossbar strength ratio so as to solve the problem of wood strobilation and certain air permeability.

The invention relates to a method of preparing a PDLC liquid crystal dimming film containing a nano silver wire transparent conductive film. The product includes a PET1 layer, a first nano silver wirelayer, a PDLC layer, a second nano silver wire layer, and a PET2 layer. The method is characterized in that through one etching by a laser etching machine, the same etching line is formed on the first nano silver wire layer or the second nano silver wire layer at the same time; and a first nano silver wire layer independent partition and a second nano silver wire layer independent partition whichhave the same shape and the same size and are overlapped mutually and correspondingly are formed on the first nano silver wire layer and the second nano silver wire layer at the same time. Through operation and control on electrodes arranged on the first nano silver wire layer independent partition and the second nano silver wire layer independent partition respectively, the function of displaying a pattern and / or a text by the dimming film is realized. The technical scheme overcomes the shortcomings of a tedious process, difficult operation, and low yield in the prior art, the operability ofthe product is improved, the electrode control system is simplified at the same time, and the product pattern and text display abilities can be improved.

The invention discloses a single-chamber osmotic pump controlled release tablet containing pregabalin. The tablet comprises a single-layer piece core, a controlled release film coating layer and at least one laser hole in a controlled release film. The basic composition of the piece core includes pregabalin or salt or hydrate thereof, diluent, adhesive and lubricant, and does not include an expansible polymer. The adopted accessories are simple and economical, the tablet can be prepared through a simple direct tabletting process, and the controlled release film coating layer includes a film forming material, a pore-foaming agent and plasticizer. According to the drug release mechanism, water and a physiological medium dissolve water-soluble active components and the diluent in the piece core through the controlled release film to form trans-film osmotic pressure, the dissolved active components are released out of the piece core through the small holes in the controlled release film, the controlled release tablet can release a therapeutic drug within a certain time range at a constant drug release rate, and the influence of the stomach and intestine difference between different individuals on drug absorption can be minimized.

The invention relates to the technical field of printing ink, in particular to high light, wear resistant and aging resistant silica gel PU printing ink and a preparation method and application methodthereof. The high light, wear resistant and aging resistant silica gel PU printing ink prepared from polyester polyol resin, a curing agent, a PU coating modifier, a coupling agent, an an anti-UV (ultraviolet) aging agent and a diluting agent has the advantages of good light and excellent adhesion, wear resistance and aging resistance, and can pass through adhesion test, friction test, cold and hot shock test, cosmetic resistance test, hand perspiration test, UV aging test and light resistance test. The preparation method includes the steps of 1, weighing; 2, dispersing and mixing. The application method includes the steps of A, spraying; B, baking. The preparation method and the application method have the advantages of simple process and low production cost, and can be suitable for large-scale production.

The invention relates to an anti-explosion light emitting diode (LED) lamp for a derrick. A plurality of reinforcing ribs, two end caps, two interior lining panel supports, a group of wiring terminals and an emergency power distribution unit are fixed on a lower shell; two support bottom plates are respectively fixed on the two supports, a connecting pipe fitting I sequentially penetrates through the end caps, the supports and a sealing ring to be in screwed connection with a plug, the plug is in screwed connection with an anti-loosening ring, and a positioning screw is placed in a groove in the connecting pipe fitting I through a screw hole in one of the supports; an electric connecting pipe fitting II sequentially penetrates through the end caps, the supports and the sealing ring to be in screwed connection with an anti-explosion packing gland, and another positioning screw is placed in a groove in the electric connecting pipe fitting II through a screw hole in the other support; four lamp holders respectively penetrate through four lamp base springs to be inserted in two LED lamp tube supports, and the two interior lining panel supports are sequentially provided with interior lining panels and the two LED lamp tube supports and are fixed together through screws; and a lampshade is fixed with an upper shell through lampshade sealing strips, and the upper shell and the lower shell are connected together. The anti-explosion LED lamp for the derrick has the advantages that tightness is high, a multi-direction adjusting function is realized, and an LED light source is adopted so that electricity is saved.

The invention discloses a water base type sealing rubber for tobacco and a method for preparing the water base type sealing rubber for tobacco, which belong to the field of adhesives. The sealing rubber consists of water-based acrylic emulsion, vinyl acetate-dibutyl maleate emulsion, water-based rosin emulsion, water-based assistant and deionized water; and the usages of the components in parts by weight are as follows: 200-400 parts of the water-based acrylic emulsion, 300-500 parts of the vinyl acetate-dibutyl maleate emulsion, 100-200 parts of the water-based rosin emulsion, 2-5 parts of the water-based assistant and the 50-100 parts of the deionized water. The sealing rubber has the characteristics of high initial adhesion, quick drying speed, excellent freezing resistance, small smell and low use cost, and is completely in accordance with the new standard requirements on the sealing rubber for tobacco.