403results about How to "Play the role of waterproof" patented technology

The invention relates to a new-energy vehicle charging pile with waterproof and take-up functions. The new-energy vehicle charging pile comprises a body, a base, a charging gun, a power line and a display screen and further comprises a take-up mechanism and a waterproof mechanism; the take-up mechanism comprises a winding assembly and a sweeping assembly; the waterproof mechanism comprises a lifting assembly and a water suction assembly. According to the new-energy vehicle charging pile with the waterproof and take-up functions, the power line can be wound around a rotating disc through the take-up mechanism, the phenomena that due to the fact that friction between the power line and the ground is caused, insulation skin is damaged, electric leakage is caused, and electric shock accidentsare caused are avoided, the surface of the power line can be swept, the power line is kept clean and tiny, and the using experience of the charging gun is improved; due to the waterproof mechanism, the body can be lifted from the base, the waterproof effect is achieved, the phenomenon that the charging pile is wetted by rainwater, so that the charging pile is damaged is avoided, the charging pileis protected, and practicability and reliability of the charging pile are improved.

The invention discloses a graphene / carbon nanotube cement-based waterproof material and a preparation method thereof. The waterproof material is prepared from the following raw materials in parts by weight: 1.2-2 parts of an aqueous solution and 15-25 parts of powder, wherein the aqueous solution is prepared from the following materials in parts by weight: 0.005-0.03 part of graphene, 0.005-0.3 part of a carbon nanotube, 0.8-1.2 parts of water, 0.1-0.3 part of a dispersing agent and 0.1-0.3 part of a defoaming agent; and the powder is prepared from the following materials in parts by weight: 6-9 parts of portland cement, 12-14 parts of silicious fine sand, 0.6-1 part of an industrial residue, 0.8-2 parts of a superfine silica mineral admixture, 1.5-3.5 parts of a silica mineral admixture, 1.2-2.2 parts of bentonite and 0.1-0.4 part of a reductive water reducing agent. The graphene / carbon nanotube cement-based waterproof material has the advantages that firstly, the graphene / carbon nanotube cement-based waterproof material has good impermeability and good impervious self-healing ability and the service life is prolonged; and secondly, the waterproof material can form a compact surface enhancement layer on the surface of a concrete structure, can play a waterproofing role, and is capable of reducing the carbonization depth of concrete.

The invention discloses a novel construction process for an expansion joint of a high-speed railway bridge, which relates to a construction process in the field of expansion joint sealing of the high-speed railway bridge. The construction process of the invention comprises following the steps: expansion joint treatment, primer preparation and brush coating, potting adhesive preparation and injection forming, curing and detection. The construction process is scientific and reasonable, greatly improves the functions of the expansion joint and greatly prolongs the service life of the expansion joint; the construction process is fine, has perfect bedding surface treatment, and improves the bonding strength of the expansion joint by more than 5 times as compared with the traditional process; and higher bonding strength between the expansion joint and the concrete interface can be obtained to play a waterproof function.

The invention discloses a USB (Universal Serial Bus) waterproof component which comprises a first circuit board, a USB connector and a waterproof sleeve, wherein the first circuit board comprises a first surface, a second surface, and a side face for connecting the first surface and the second surface; the USB connector is fixedly arranged on the first surface of the first circuit board; the waterproof sleeve comprises a sleeve body which is partially covered on the first surface, and an edge part which is bent and extended from the edge of the sleeve body to the second surface; the side face of the first circuit board is wrapped by the edge part; an opening is arranged in a position where the sleeve corresponds to the USB connector; and the USB connector passes through the opening. The invention also discloses portable electronic equipment. With adoption of the above mode, the portable electronic equipment can be sealed by the USB waterproof component and the portable electronic equipment, so that the waterproof effect can be effectively achieved.

The invention discloses a fireproof foam board and a production method thereof. The fireproof foam board comprises a waterborne binding agent solution, polystyrene particles, magnesia, talcum powder, wood powder and a foaming agent in volume ratio of 0.3:1:0.2:0.05:0.1:0.0005, wherein the waterborne binding agent solution is prepared from water and a waterborne bonding agent according to the volume ratio of 1:450; weighing various materials according to the formula; feeding the wood powder in the waterborne binding agent solution firstly; uniformly stirring and pouring the magnesia and the talcum powder; uniformly stirring and feeding the foaming agent for foaming; after foaming, enabling the mixture and the polystyrene particles to simultaneously enter the interior of a special stirrer and uniformly stirring; after pouring the stirred mixture in a die and applying pressure of 400kilos, pushing the mixture in a greenhouse with 40DEG C and drying for one hour; and finally demoulding and cutting into boards with a certain specification by using a dicing saw. The fireproof foam board using polystyrene foam has the characteristics of excellent heat-insulating performance, reasonable formula, reached A-level fireproof property, environment protection, no pollution, and simple producing and mounting method.

The invention discloses an industrial thermal insulation coating. The industrial thermal insulation coating comprises a surface layer coating and a bottom layer coating, wherein the surface layer coating contains a waterproof emulsion, coarse whiting, titanium dioxide, vacuum ceramic microbeads and silica fume; and the bottom layer coating contains high-temperature resistance fibers, water, a surfactant, a thickener, a binder, titanium dioxide, silica fume, fumed silica, vacuum ceramic microbeads, vitrified microbeads and floating beads. A composite coating layer structure containing the surface layer coating and the bottom layer coating is adopted, the bottom layer coating has an industrial thermal function, and the surface layer coating has a waterproof function; the bottom layer coating has good industrial thermal performance, so that the surface temperature of the coating can be decreased, the waterproof emulsion of the surface layer coating can be used at a proper temperature, and the waterproof performance is not influenced due to the high temperature; and meanwhile, the surface layer coating has waterproof and protection effects to the bottom layer coating, so that a composite coating layer formed by the surface layer coating and the bottom layer coating has the dual efficacies of thermal insulation and water proofing.

The invention discloses a heat-insulating coating for a building, belonging to the technical field of heat-insulating coatings. The heat-insulating coating comprises the following raw materials: 320-380kg of common silicon white cement, 420-480kg of quartz sand, 180-220kg of ground limestone, 2-4kg of cellosilk, 28-32kg of vitrified micro bubbles, and 18-22kg of colloidal crystal, and all the rawmaterials are uniformly mixed when the coating is manufactured. The heat-insulating coating has the beneficial effects that: 1, the sunscreen effect and the heat-insulating effect are good, the solarradiation energy can be reflected by more than 85%; 2, the integrated functions of waterproofing, heat insulation and heat preservation are achieved; 3, the cost performance is high, and the manufacturing cost per square meter can be reduced by 10-15RMB; 4, the construction is simple, the coating is suitable for waterproofing, seepage proofing and heat insulation of various housetop roofs, and the coating can be applied to construction simply after being added with water and uniformly mixed; and 5, the coating has the advantages of favorable weather resistance, corrosion resistance, ageing resistance, favorable caking property, difficulty in shedding, environment friendliness and use safety, and can be used for greatly prolonging the service life of the roofs and wall surfaces.

The invention relates to the technical field of building materials, in particular to a building dry powder mortar for building insulation board. The building plastering mortar is prepared from a mixture and water, wherein the mixture comprises the following components in portions by weight: 240-400 portions of ordinary portland cement, 30-100 portions of triple superphosphate, 500-680 portions of river sand, 20-50 portions of redispersable polymer gelatine powder, 1-3 portions of water-retaining agent and 0.2-3 portions of compound additive. The dosage of water is 4-20 times as much as the total weight portions of the mixture. The building dry powder mortar is used for construction of building external walls, and can enable the building external walls to have the advantages of favorable water retention, high binding strength, shedding resistance after moisture absorption, favorable water resistance, etc.

The invention discloses a comb-type bridge expansion joint plate structure and a cleaning device thereof. The comb-type bridge expansion joint plate structure comprises a first beam body, a second beam body arranged on one side of the first beam body, a comb plate supporting plate and a first comb-type expansion joint plate, wherein preformed grooves are formed in the first beam body and the second beam body respectively; an expansion joint is arranged between the first beam body and the second beam body; the comb plate supporting plate is arranged in the preformed grooves; the comb plate supporting plate is fixedly connected with the first beam body and the second beam body through fixing rivets; the first comb-type expansion joint plate is arranged in the comb plate supporting plate; anda second comb-type expansion joint plate is arranged on one side of the first comb-type expansion joint plate. The comb-type bridge expansion joint plate structure achieves the anti-seismic bufferingfunction; the strength of the structure at the expansion joint is improved; accumulated water and dust in the expansion joint are convenient to clean away; the internal structures of the expansion joint are prevented from being affected by the accumulated water; and the problem is solved that the first beam body and the second beam body squeeze each other to cause potential safety risks.

The invention provides a corrugated paper box with high compressive strength and a preparation process thereof. The corrugated paper box comprises a box body composed of corrugated paper boards, wherein the corrugated paper boards comprise an upper paper board and a lower paper board; a first partition plate and a second partition plate are arranged between the upper paper board and the lower paper board; a plurality of closely-arranged paper tubes are vertically arranged between the first partition plate and the second partition plate; first corrugated paper and a first pressure-resistant tube which are arranged in a staggered mode are arranged between the first partition plate and the upper paper board; second corrugated paper and a second pressure-resistant tube which are arranged in astaggered mode are arranged between the second partition board and the lower paper board; the first corrugated paper and the second corrugated paper are both of semi-circular arc structures; and hemispherical hollow buffer cavities are respectively formed between the first corrugated paper and the first partition board and between the second corrugated paper and the second partition board. According to the corrugated paper box with high compressive strength, compared with the prior art, the pressure-resistant structures are arranged inside the corrugated paper boards, so that the corrugated paper box has high-strength pressure-resistant capability.

The invention discloses an electric balance car which comprises a car body, wheels, a drive motor used for driving the wheels, a power supply used for providing power, a circuit board, a controller and a light-emitting lamp, wherein the circuit board is provided with a sensor, the light-emitting lamp is electrically connected with the power supply, and the controller is electrically connected with the circuit board, the power supply and the drive motor. The car body comprises an upper shell, pedals, a middle shell, a lower shell and a lampshade. The middle shell is located between the upper shell and the lower shell. The lampshade is provided with at least two light-pervious lamp strips arranged in a spaced mode. The car body is provided with lamp holes used for containing lamp strips, and the number of the lamp holes and the number of the lamp strips are the same. The lamp strips are sleeved with waterproof rings. The lamp strips is closely pressed to the lamp holes through the waterproof rings. The car body is provided with at least two lamp holes when used for installing and fixing the lampshade. Compared with the structure that only one lamp hole is arranged to be matched with a lampshade, by means of the balance car, the lampshade is firmer when fixedly installed on the car body and is not likely to shake. Besides, the waterproof rings are arranged to achieve the waterproof function.

The invention discloses a reagent box for detection or auxiliary detection of tuberculous pleurisy and belongs to the technical field of detection of the tuberculous pleurisy. The reagent box includes a box body. A box cover is installed on the top of the box body. A handle is disposed in the center of the top of the box cover. A temperature sensor is installed on the bottom of a bottom board. A separation board is installed on the top of the bottom board. A specification book placing groove is formed in the right side of an inner chamber in the bottom board. A plurality of reagent placing slots are formed in the bottom board uniformly. The temperature sensor is used for detecting the temperature in the reagent box, when the temperature is excessively high, a controller controls a refrigerating apparatus for performing refrigeration, thereby ensuring stability of storage temperature of the tuberculous pleurisy reagents and prolonging the preservation time of the tuberculous pleurisy reagents. By arranging the grooves around the reagent placing slots, the reagents are convenient to take and store. The reagent box is convenient to use, and can be used for auxiliary detection of the tuberculous pleurisy well.

The invention provides a dual-waterproof connecting device which comprises a containing cavity which can contain a female head, and a hollow middle sleeve which can contain a male head, wherein the outer wall of the containing cavity is provided with external threads, a buckle is arranged at the front end of the external threads, a panel fastening nut which is matched with the external threads on the outer wall of the containing cavity is sleeved on the outer wall of the middle sleeve, the front end of the middle sleeve can be sleeved outside the containing cavity, a clamping position which can be clamped with the buckle is arranged on the inner wall of the front end of the middle sleeve, an annular fastening rubber ring which can seal a wire harness section of the male head is arranged inside the rear end of the middle sleeve, and a fastening nut is further arranged at the rear end of the middle sleeve. The dual-waterproof connecting device suits to be used outdoors, is reliable in connection and long in service life, and can protect a connecting terminal and an equipment cabinet at the same time.

The invention relates to a method for preparing honeycomb enhanced phenolic foam composite materials. The method is characterized by including the steps of: (1) pouring phenolic resin foam composite into a die; (2) vertically placing a honeycomb in the phenolic resin foam composite in the die; (3) placing the die with the phenolic resin foam composite and the honeycomb in the step (2) into a baking oven at the temperature of 50-100 DEG C for foaming for 5-10h, and obtaining the honeycomb enhanced phenolic foam composite material. Via one-time soaking and heating consolidation, the method is capable of preparing the honeycomb enhanced foam composite materials with phenolic foam ingredients in the honeycomb materials and phenolic foam filled in honeycomb lattice holes, the operation procedure is extremely simple, only the die and the baking oven are utilized as equipment, so that the method has the advantages of efficiency and low cost, meanwhile, the composite material products can be guaranteed to have the advantages of good combination properties like light weight, sound insulation, heat insulation, specific strength, specific modulus, water resistance and flame retardance.

The invention discloses a processing technology of an A-level fireproof biomass floor. The processing technology of the A-level fireproof biomass floor comprises the following steps that firstly, woodfibers, magnesium oxide, magnesium chloride and other auxiliaries are uniformly mixed and stirred, and are put into a mold, pressurizing and locking are conducted, continuously keeping is conducted for 3-10 days, demolding and floor discharging are conducted, then edging, drying and sanding are conducted to obtain a base material plate layer, a decorative adhesive film paper, the wear-resistant adhesive film paper, the base material plate layer and a balance adhesive film paper are laid in sequence, hot pressing is conducted at the temperature of 140-200 DEG C under the pressure of greater than 20Mpa for 30-300 seconds, and slitting, slotting and painting are conducted on the hot-pressed plate to primarily form the waterproof and fireproof biomass floor. The processing technology of the A-level fireproof biomass floor has the beneficial effects that the floor manufactured through the method is free of using an aldehyde adhesive in a preparation process of the floor, so that the flooris more environmentally friendly, a base material layer contains the magnesium chloride and the magnesium oxide, the fireproof performance of the floor can be improved as well, and the upper surface and the lower surface of the base material layer contain the film paper so that the waterproof effect can be achieved as well.

The invention relates to the technical field of motors, in particular to a motor with an anti-corrosion driving shaft. The motor comprises a motor body, wherein a driving shaft is arranged on the motor body, an abutting mechanism is installed on the driving shaft, a plurality of sets of fixing mechanisms are installed on the motor body, a lubricating mechanism is installed on the motor body, an oil injection mechanism is installed in the lubricating mechanism, and the motor body is connected with a dustproof mechanism and is provided with a sealing mechanism. Through the effect of the fixing mechanisms, the motor and external equipment can be conveniently installed and fixed; an external gear can be conveniently installed under the effect of the abutting mechanism, and the gear can be stably clamped and conveniently disassembled; under the effect of the sealing mechanism, an external cable of the motor can be conveniently sealed to prevent water from entering the interior of the motor to cause damage; the motor and the driving shaft are indirectly lubricated under the action of the lubricating mechanism, so the working efficiency of the motor is improved; and lubricating oil is conveniently injected under the action of the oil injection mechanism, and the lubricating oil is prevented from overflowing.

The invention discloses a cooling device for a deep hole drilling machine and a cooling method, relates to the technical field of cooling devices, and aims to solve the problems that an existing cooling device for the deep hole drilling machine is poor in cooling effect and does not have a circulating cooling function. A threaded rod is arranged above a base, a groove is fixedly formed at the lower portion of the threaded rod, a sliding rod is fixedly arranged at the front end of the threaded rod, a threaded sleeve is arranged on the outer wall of the threaded rod in a threaded manner, a sliding sleeve is arranged on the outer wall of the sliding rod in a sliding manner, and the sliding sleeve is fixedly connected with the threaded sleeve. A movable plate is fixedly arranged at the front end face of the sliding sleeve, a motor shell is fixedly arranged above the movable plate, a second motor is fixedly installed in the motor shell, a cooling water tank is fixedly arranged above the motor shell, a drill bit is arranged at the output end of the second motor, and the drill bit is fixed to the lower portion of the movable plate. A blocking cover is fixedly arranged below the drill bit,and a workbench is fixedly arranged in the blocking cover.

The invention discloses a waterproof plasterboard. The waterproof plasterboard comprises, by weight, expanded vermiculite of 20.0 to 60.0 parts, expanded perlite of 12.0 to 30.0 parts, desulfurized gypsum powder of 100.0 to 300.0 parts, mixed fiber of 60.0 to 180.0 parts, organosiloxane of 40.0 to 60.0 parts, a stearate of 20.0 to 60.0 parts, a thickening agent of 10.0 to 30.0 parts, and water of2000.0 to 3000.0 parts. The waterproof plasterboard possesses following advantages: a hydrophobic film is formed on the plasterboard because of polymerization of silane, so that water resistance is achieved; adsorption of organosiloxane onto the stearate is adopted, on one hand, siloxane volatilization is prevented, and on the other hand, organosiloxane is uniformly dispersed in gypsum, the stearate is capable of promoting siloxane hydrolysis, the stearate possesses water resistance, and is capable of providing the finished product plasterboard with smoothness and flexibility. The waterproof plasterboard prepared using the above method possesses following advantages: the adding amount of a waterproof agent is low, cost is low, effect is excellent; and poly(p-phenylene benzobisoxazole) fiber is lower in density, and higher in specific strength and specific modulus than those of carbon fiber.

The invention provides an LED display screen, comprising a box frame and a display unit fixed in the box frame. The display unit comprises a PCB board and a plurality of LED lamp beads fixed on the PCB board. The front and back surfaces of the display unit are coated with a transparent waterproof film. The front and back surfaces of the display unit of the LED display screen provided by the invention are coated with waterproof films, which can play a waterproof role and avoid short circuit of the display unit. The waterproof film can also play the role of protecting the LED lamp beads and PCBboards, avoiding damage to the LED lamp beads and corrosion of the PCB boards; The transparent waterproof film is convenient for the light emitted by the LED lamp beads to be irradiated out through the waterproof film, so the PCB board after the LED lamp beads are installed and the waterproof film is coated can be directly fixed on the box frame, so that the PCB board can be used, and the PCB board can be directly maintained during maintenance, and the PCB board is simple and convenient.

The invention provides a power distribution cabinet having an efficient heat dissipation function. The power distribution cabinet comprises a cabinet body and an exhaust hood. The exhaust hood is connected on the upper end of the cabinet body. The end, outside the cabinet body, of the exhaust hood is fixedly connected with a rain cover. The side walls, outside the cabinet body, of the exhaust hoodare provided with a plurality of exhaust vents. The power distribution cabinet having the efficient heat dissipation function is simple in structure; through fixation frames and horns, the incoming flow is allowed to partially flow into an air flow space; through distribution covers, air flow is allowed to come from different directions to take away the heat in all parts of electrical equipment,thereby achieving an efficient heat dissipation effect; through heat conduction rods and water absorption sponges, temperature in a ventilation frame is allowed to be transmitted to the water absorption sponges, thereby achieving a heat dissipation effect; and through the rain cover, water shielding plates and water absorption cotton, external rainwater can be prevented from entering the cabinet body, thereby achieving a waterproof effect.

The invention relates to a waterproof agent for textiles, and particularly relates to a fluoride-free waterproof finishing emulsion for textiles and application of the fluoride-free waterproof finishing emulsion. The fluoride-free waterproof finishing emulsion is prepared from the following components in parts by weight (dry component): a) 80-40 parts of long carbon chain-modified amino resin, b)1-8 parts of cation-modified long carbon chain amino resin, c) 1-10 parts of a metal complex of long carbon chain carboxylic acid, d) 10-55 parts of wax, e) 0.05-3 parts of a cationic emulsifier, f) 0.01-2 parts of a nonionic emulsifier and g) 0.001-1.5 parts of organic acid or inorganic acid. The waterproof agent provided by the invention is suitable for waterproof finishing of dacron, cotton, ester, artificial boards or papermaking and various blended fabrics, and has excellent waterproof performance.

The invention relates to a combined high-voltage discharge type drilling device and a drilling method. The combined high-voltage discharge type drilling device comprises a drill rod, two chambers, a laser range finder, a drill bit, a high-voltage electrode and a grounding electrode; an inner cavity of the two chambers is separated into a left side chamber and a right side chamber; the right side chamber is internally provided with a pulse current generating device and a signal transmission device; the drill rod is connected to the upper end of the two chambers, a revolution turntable is installed at the top end of the drill rod, the pulse current generating device is connected with the grounding electrode and the high-voltage electrode through a telescopic device, and the laser range finder is installed on the outer wall of the telescopic device; a grounding rod is mounted on the telescopic device, one end of the grounding rod is connected with the grounding electrode through the telescopic device, and one end of the grounding rod is exposed outside the telescopic device; and a rotation turntable is arranged on the lower surface of the left side chamber, the rotation turntable is connected with a pressure plate group, and the drill bit is connected with the pressure plate group through a connecting plate. The combined high-voltage discharge type drilling device performs drilling by means of pulse discharge shock waves, plasma channels and mechanical grinding, the drilling speed is increased, and the wear of the drill bit is reduced.

The invention provides an outdoor printing equipment installation protection structure. The outdoor printing equipment installation protection structure comprises a protection box body, wherein the box body is internally provided with a supporting seat; printing equipment is installed on the supporting seat; a ticket outlet is formed in the box body; a heat insulating layer is arranged on the inner wall of the box body; a door is arranged on the side face of the box body; a cover plate is installed on the door in a sealing manner. A waterproof baffle plate is further arranged on a door frame, the waterproof baffle plate is overturned outwards to form a waterproof groove structure, double protection is realized through a sealing structure and the waterproof groove structure, and a better waterproof effect is achieved in the process of opening or closing the cover plate. An air inlet and an air outlet are further formed in the box body and a fan is installed on the box body to form a heat radiating passage from bottom to top, a rainproof cover is arranged at the air outlet of the passage, the printing equipment is installed on the supporting seat through a support, a height adjusting mechanism and a horizontal adjusting mechanism are arranged between the support and the supporting seat, and item printing is used for setting the adjustment in the horizontal direction and the vertical direction, so that a paper outlet of the printing equipment corresponds to the position of the ticket outlet of the box body.

The invention discloses a preparation process of a high hydrophobic antibacterial polyurethane film. The high hydrophobic antibacterial polyurethane film is prepared by weighing the following raw materials: 100-120 parts by weight of acetone, 30-40 parts by weight of fluorine-containing alkyl polyether glycol, 1-2 parts by weight of mono-n-butyltin oxide, 20-40 parts by weight of diisocyanate, 0.5-1.5 parts by weight of a chain extender, 5-10 parts by weight of KH550, 20-45 parts by weight of dimethylformamide and 3-5 parts by weight of an antibacterial agent; and fibers of fiber films prepared by electrostatic spinning are superimposed in a random orientation mode in the spinning process to form a multi-level rough structure, the surface roughness of the fiber films is further increased,the hydrophobic angle is also increased, and the fiber films are given excellent hydrophobicity. The technical problem that use is affected due to the fact the film packaging materials are wet due tothe fact that the polyurethane has moisture permeability during use because the polyurethane is block polymer with a soft segment and a hard segment, and the hard segment can play a role in waterproofing and the soft segment has moisture permeability is solved.

The invention relates to the technical field of power electrical equipment, and discloses a power electrical switch cabinet with a good waterproof function, which comprises a cabinet body and a cabinet door; a waterproof rubber pad is arranged between the cabinet body and the cabinet door, and a support rod is fixedly arranged at the top of the cabinet body. The invention discloses the power electrical switch cabinet with the good waterproof function; a servo motor, a PVC waterproof cloth, an iron sheet, an iron core and an electromagnet formed by electrifying a coil are arranged; during raining, a rain and snow sensor senses rain and sends information to a controller; the controller issues a command to a pulse encoder to send out a pulse to enable the servo motor to rotate forwards, so the PVC waterproof cloth wound on a winding drum is put down, and the controller controls an electromagnetic switch to switch on a circuit of the coil, so that the coil is powered on to form the electromagnet with the iron core; the electromagnet attracts the iron sheet, so the PVC waterproof cloth seals a heat dissipation groove; it is prevented that in rainy days, wind that carries rainwater enter the cabinet body, and components in the cabinet body are affected with damp or short-circuited.

The invention belongs to the technical field of food fresh keeping and particularly relates to a chilled fresh meat complexing agent capable of improving moisture holding and fresh keeping effect. The chilled fresh meat complexing agent is characterized by comprising the following raw materials by weight: 1-10% of emulgator, 5-25% of edible oil, 0.1-0.3% of preservative, 30-60% of water and 10-30% of fresh keeping agent. The chilled fresh meat complexing agent has the advantages that the chilled fresh meat complexing agent is diluted by adding water and then evenly coated on the surface of the meat, and then a layer of thin water-resistant oil film is formed on the surface of the meat to obtain water-resistant effect; besides, the preservative can prevent the complexing agent from being polluted by microorganisms; and the fresh keeping agent can keep the meat fresh for a long time.

The invention discloses a waterproof detachable electric type test tube brush which comprises a power assembly, an upper rod piece, a connection assembly, a lower rod piece and bristles, wherein the power assembly comprises a battery shell, an upper shell, a lower shell, a motor seat, a shaft coupler, a bearing pedestal, a bearing, a connection piece, sealing rings, a battery and a motor; the battery is positioned in the battery shell; the battery shell is fixedly connected with the lower shell; the lower shell is mechanically connected with the upper shell; the motor seat is mounted in the lower shell; a motor is mounted on the motor seat; an output shaft of the motor is connected with the connection piece through the shaft coupler; the bearing is mounted on the shaft at the upper end of the connection piece and is mounted in the bearing pedestal; the upper rod piece is connected with the interior of a longitudinal hole of the connection piece; the lower end of the upper rod piece is connected with a lower rod piece through the connection assembly; the bristles are fixedly arranged on the lower rod piece; sealing rings are embedded into the lower ends of the upper shell and the lower shell; a sealing ring is embedded into the upper end of the bearing pedestal. The electric type test tube brush is waterproof under the assistance of the sealing rings, can clean a test tube and is convenient to detach.

The invention relates to the technical field of LED display screens, and discloses an LED display screen with heat dissipation effect. The LED display screen with the heat dissipation effect comprisesa housing. One side of the housing is provided with a fan. One side of the fan is fixedly connected with a cold air duct. The inner wall of the cold air duct is fixedly connected with rock wool. Oneend of the cold air duct is fixedly connected with a semiconductor cooler. One side of the semiconductor cooler is fixedly connected with a radiating fin. The inner wall of the housing is fixedly connected with a homogeaezing plate. One side of the homogeaezing plate is fixedly connected with a circuit board. One side of the circuit board is provided with a first insulating layer. The LED displayscreen with the heat dissipation effect is capable of transporting the cold air generated by the semiconductor cooler to the interior of the housing through the fan, enabling the cold air to be uniformly distributed through the homogeaezing plate, and improving the heat dissipation effect. The cold air is transported to each transverse radiating hole for cooling through the homogeaezing plate, theairflow buffering is performed by a spherical heat dissipation buffering hole, the contact area of the cooled airflow with a circuit board, a heating panel and a printed circuit board is increased, and the heat dissipation effect is improved.