1489results about How to "Play a blocking role" patented technology

The invention discloses an ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and an experimental method. The experimental facility comprises a rock core clamp holder, a ring compression feed device, an ultrasonic energy converter, an ultrasonic generator, a chemical reagent storage tank connected with a liquid inlet of the rock core clamp holder by a conveying pipeline, a water storage tank, an oil storage tank and a liquid container connected with a liquid outlet of the rock core clamp holder. The experimental method comprises the following steps of: 1, pretreating a tested rock core; 2, testing the initial permeability of the rock core through water drive; 3, polluting the rock core; 4, testing the permeability of the polluted rock core through the water drive; 5, performing an ultrasonic-assisted chemical reagent blockage removal experiment; 6, testing the permeability of the rock core subjected to the blockage removal through the water drive; 7,performing the ultrasonic-assisted chemical blockage removal experiment under the condition of ultrasonic oscillation with different frequencies and amplitudes; and 8, processing data. The ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility has reasonable design, complete functions and high using effect, is easy and convenient to arrange and operate, and can realize the pulse fluctuation of the chemical blockage removal under the action of the ultrasonic oscillation.

The invention discloses a hydraulic pulse-assisted reservoir chemical remedial treatment experiment device and a hydraulic pulse-assisted reservoir chemical remedial treatment experiment method. The experiment device comprises a core holder, an annular pressure supply device, a chemical reagent storage tank, a water storage tank, an oil storage tank and a liquid container, wherein the chemical reagent storage tank, the water storage tank and the oil storage tank are connected with a liquid inlet of the core holder through delivery pipes; the liquid container is connected with a liquid outlet of the core holder; and a hydraulic pulse generating device is arranged on each delivery pipe. The experiment method comprises the following steps of: 1, preprocessing a tested core; 2, measuring the initial permeability of the core by water drive; 3, polluting the core; 4, measuring the permeability of the core by water drive after pollution; 5, performing a hydraulic pulse-assisting chemical reagent remedial treatment experiment; 6, measuring the permeability of the core by water drive after remedial treatment; 7, performing the hydraulic pulse-assisted chemical reagent remedial treatment experiment under the conditions of different frequencies and different amplitudes; and 8, arranging data. The device is rational in design, convenient to arrange, complete in function, simple to operateand good in using effect and can realize pulse fluctuation of the chemical remedial treatment under the action of an injection pressure.

The invention discloses a single / double slurry alternated grouting reinforcement technology of a tunnel and a device of the single / double slurry alternated grouting reinforcement technology. The single / double slurry alternated grouting reinforcement technology comprises the steps of preparing slurry, wherein a component A is prepared into cement slurry, the cement slurry comprises water, cement and an additive, a water cement ratio is 0.8-0.9, the cement slurry can flow into a cement slurry storage barrel after being uniformly stirred, a component B adopts water glass solution, and cement and water glass double slurry can be formed after the component A and the component B enter a mixer by connecting a grouting pump through pipelines; grouting, wherein a water glass solution valve can be switched off, a cement slurry valve can be switched on, pure single cement slurry can be firstly injected, mixed injection can be carried out by switching on the water glass solution valve, and the interval injection time of single slurry and double slurry is controlled within 1-3 mins; washing, wherein the pipelines need to be washed immediately after the grouting in one hole is completed. According to the single / double slurry alternated grouting reinforcement technology disclosed by the invention, the solidification time by simply injecting the single slurry is slow and the filling range of the double slurry is small are solved, the slurry can be reasonably controlled to reach to a corresponding stratum position and to be solidified, and the effects of well filling stratum gaps and preventing the ground from collapsing again can be obtained.

The invention discloses an underground ultrasonic yield-increasing and atomized pumping device for coalseam gas. A reciprocating vacuum pump and an underground ultrasonic wave generator are connected by a control cabinet. The underground ultrasonic wave generator is connected to the ultrasonic yield-increasing and atomized pumping device. The reciprocating vacuum pump is connected to oil pipes. A casing pipe provided with an oil pipe is deeply inserted into a coalseam. An oil pipe opening is higher than a casting pipe opening. The ultrasonic yield-increasing and atomized pumping device is installed at the lower end in the oil pipe and used for sealing the oil pipe lower opening. The device includes: a high-power ultrasonic atomization transducer and a yield-increasing device ultrasonic transducer. The lower end of the high-power ultrasonic atomization transducer is connected to the yield-increasing device ultrasonic transducer, and is extended the lower end of the oil pipe opening. An inlet duct communicated with the casting pipe inner chamber is arranged in the oil pipe. A filter screen, a solenoid valve and a liquid level sensor are arranged in the inlet duct. The lower wall of the casting pipe is provided with eyeholes. A coalseam opening is arranged out of the casting pipe above the ground. According to the underground ultrasonic yield-increasing and atomized pumping device disclosed by the invention, the pumping operation for the coalseam gas can be completed, no mechanical motion occurs, and the advantages of saving energy, increasing the total desorption amount of the coalseam gas, reducing the cost and being simple in maintenance are achieved.

The invention provides a three-dimensional surface shot peening jet electrodeposition manufacturing method and device. According to the manufacturing method and device, a deposition solution and hard particles are mixed and deposit on a conductive substrate in a spraying manner, so that the rapid manufacturing technology of electrodeposition is realized, the growth rate of grains in the electrodeposition process is slowed down, the purpose of refining the grains is reached, and the quality of a deposition layer is dramatically improved; with combination of the shot peening strengthening technology and the electrodeposition technology, the defects of loose texture, pockmarks, pits and the like of the deposition layer caused by single electrodeposited cathode hydrogen evolution and impurity adhesion can be effectively overcome, and the hardness and the compactness of the deposition layer are improved; meanwhile, by introducing a five-axis linkage numerical control machining system, processing formation of a three-dimensional space can be realized, and the uniformity and the shape accuracy of the deposition layer are improved; and the technology can be widely applied to production of noble metal devices and parts in complex shapes and can also be used for surface rapid coat-plating, a strengthening technology and the like.

The invention mainly discloses an urban rainwater purification method and a hydraulic jump type filter used therein. According to the technical scheme of the invention, the urban rainwater purification method comprises the following steps: collecting rainwater, detecting the rainwater, carrying out sedimentation treatment, carrying out pH value treatment, carrying out aeration treatment, carrying out biological purification, carrying out fine filtration, and storing. The used hydraulic pump type filter comprises a first filter cartridge and a second filter cartridge, a detection cavity is arranged at a water outlet, only after water body is detected to be in line with urban water consumption requirements by virtue of a detection head, the water body is conveyed into a water storage tank, otherwise the water body is conveyed into the first filter cartridge and the second filter cartridge to be filtered again. The urban rainwater purification method disclosed by the invention has the advantages that the rainwater is collected and purified, collection, permeation, purification and utilization of the rainwater in an urban range are realized to the utmost extent under the premise of guaranteeing waterlogging prevention and safety of a city, urban waterlogging stress can be effectively alleviated and reduced, purification efficiency is high, water quality of the treated rainwater is effectively improved, utilization of a rainwater resource is promoted, and sponge urban construction requirements are met.

The invention relates to a mask for evaporation and a preparation method. The mask for evaporation includes a frame, a transverse support bar, a sheltering bar, a mask substrate and a vertical supportbar; a first mounting groove, a second mounting groove, a third mounting groove and a fourth mounting groove are formed in the frame, the first mounting groove and the second mounting groove both extend in the horizontal direction of the frame, and both the third mounting groove and the fourth mounting groove extend in the vertical direction of the frame; the two ends of the transverse support bar are located in the first mounting groove and the second mounting groove respectively; the two ends of the sheltering bar are located in the third mounting groove and the fourth mounting groove respectively, and the transverse support bar is connected with the sheltering bar in a lap joint mode; the vertical support bar and the mask substrate jointly bear the pressing gravity of a substrate, thus, the deformation of the mask substrate which is caused by the extrusion of the substrate is alleviated, the service life of the mask is prolonged, and the problem is avoided that because opening patterns of an effective area of the mask substrate deform due to the deformation of the mask substrate, colour cast and even colour mixture occur.

The object of the present invention is to design a non-Newtonian fluid speed bump device, which is composed of a speed bump rubber shell, a cavity, an elastic rubber bladder, and a non-Newtonian fluid. There is a cavity in the rubber shell of the speed bump, an elastic rubber bag is arranged in the cavity, and a non-Newtonian fluid is arranged in the elastic rubber bag. The cross section of the rubber shell of the speed bump is arc-shaped. When the car passes by at high speed, the rubber shell of the speed bump is quickly stressed, and the elastic rubber bag in the cavity is quickly stressed, and the elastic rubber bag quickly transmits the force to the non-Newtonian fluid. The non-Newtonian fluid is not deformed much, and the rubber shell of the speed bump is not deformed much. play a blocking role. When there are low-speed vehicles such as bicycles or cars passing by at low speed, the rubber shell of the speed bump is relatively slow in force, and the elastic rubber bag in the cavity is relatively slow in force, and the elastic rubber bag transmits the force to the non-Newtonian fluid, and the non-Newtonian fluid deforms Larger, the lower limit of the deformation of the top of the rubber shell of the speed bump, the resistance of the vehicle passing through is small, and the vehicle can pass more smoothly.

The invention discloses a preparation method and application of a composite antibacterial electrostatic spinning nanofiber membrane. The preparation method is used for an antibacterial air filtering material for masks. The material is prepared by taking polyvinyl alcohol, chitosan, vinyl amine-copolymerized-3-allyl-5,5-dimethyl hydantoin as raw materials. The preparation method comprises the following steps: uniform blend spinning is carried out on the polyvinyl alcohol and the chitosan to obtain a material as an innermost-layer nanofiber membrane and an outermost-layer nanofiber membrane, andan auxiliary antibacterial effect and a mechanical supporting effect are achieved; an intermediate layer is prepared by carrying out blend spinning on the polyvinyl alcohol and the vinyl amine-copolymerized-3-allyl-5,5-dimethyl hydantoin, and a main antibacterial effect is achieved; and a three-layer nanofiber membrane obtained by spinning is placed in glutaraldehyde steam for cross-linking treatment. The preparation method disclosed by the invention is simple and feasible and is controllable in condition, and the composite antibacterial electrostatic spinning nanofiber membrane is excellentin interception effect and sterilization effect and has important value and significance in the field of antibacterial filtering materials for masks.

The invention relates to a biochar-based fertilizer for restoration of heavy metal contamination of arable soil. The biochar-based fertilizer is composed of, by mass, 50% of biochar, 15% of micropowder of water-chilled dreg from a blast furnace, 30% of fresh cow dung and 5% of a composite biological inoculum. As the biochar and the micropowder of water-chilled dreg from the blast furnace undergo strict screening and effective component activation, the pH value of the soil is increased, the granular structure of the soil is improved, adsorption effect on heavy metal elements in the soil is effectively strengthened, and soil heavy metal restoration effect is enhanced; and in the composite composed by the biochar, the micropowder of water-chilled dreg from the blast furnace, the fresh cow dung and the composite biological inoculum according to a certain proportion, the biochar improves adsorption of heavy metals in a soil solution, the micropowder of water-chilled dreg enhances the silicon utilization rate of crops under the action of an activator, the crops prevent and control migration of heavy metals to the bodies of plants while absorbing silicon so as to reduce heavy metal content in the crops, and the biochar and the micropowder of water-chilled dreg have synergistic interaction in controlling of absorption of heavy metal elements in the soil by the crops.

The invention provides a foliar blocking and controlling agent capable of reducing cadmium contamination of brown rice, and a preparation method and application thereof, belonging to the technical field of foliar sprinkling fertilizer for crops. The preparation method comprises the following steps: adding, on the basis of each liter of water, 200 to 230 g of silicon dioxide, 60 to 80 g of potassium oxide, 8 to 15 g of calcium oxide, 1 to 2 g of selenium, less than 2 g of adding elements and 1 to 2 g of a plant growth regulator into a container equipped with a stirring device; carrying out uniform mixing under stirring; controlling stirring time and speed; and the discharging the obtained mixture and carrying out so as to obtain the foliar blocking and controlling agent capable of reducing cadmium contamination of brown rice. The application of the foliar blocking and controlling agent comprises a first step of diluting the foliar blocking and controlling agent with water and a second step of sprinkling the diluted agent on the leaves of rice in stages. The foliar blocking and controlling agent inhibits migration of cadmium ions, guarantees ideal cadmium reduction effect on brown rice, realizes the dual effects of cadmium blocking and nutrient absorption of plants, enables the yield of paddy rice per mu to increase by 6% or above, is beneficial for prolongation of the life span of human beings and increases the added value of rice; the preparation method is simple and has no strict requirements on essential factors; and the application method is convenient and efficient.

The invention discloses composite ecological fillers and a preparation method of the composite ecological fillers. Adsorption functions of steel slag, anthracite and zeolite to nitrogen and phosphorus substances in sewage are utilized to optimize three types of fillers and enable the fillers to have a modularized characteristic. The composite ecological fillers are applicable to a trickling filter bed, an anaerobic biological filter tank, a filter tank, an aeration biological filter tank, a high-load biological filter tank, an active biological filter tank and the like, and can be used for river and lake slope protection materials.

The invention provides an atomizer. The atomizer comprises an outer sleeve tube, a solution storage tube in the outer sleeve tube, and an atomizer head located at the lower portion of the solution storage tube. A solution storage cavity is formed in the solution storage tube. A gas exhaust channel is formed between the outer sleeve tube inner wall and the solution storage tube outer wall. An atomizing cavity is formed in the atomizer head, and is communicated with the solution storage cavity and the gas exhaust channel respectively, wherein the tobacco juice in the solution storage cavity enters in the atomizing cavity to be atomized into mist, which then flows out through the exhaust channel. According to the atomizer, when the tobacco juice absorbed by the atomizer head appears oil explosion because of insufficient atomization, the solution storage tube above the atomizer head can play a role of a stopper, the small tobacco juice particles can only be released from both sides of the atomizer head, thus avoiding the scenario that the tobacco juice flows out from the position above the atomizer head to enter directly into the user's mouth. An electronic cigarette using the atomizer is also provided.

The invention discloses a method for molding a vertical wall of a deep foundation pit. The method comprises the following steps: drilling a plurality of presplit holes on a preset edge of the foundation pit and filling each presplit hole with a stick dynamite and a detonating fuse connected with an instant electric detonator outside the hole by adopting full-pit-depth one-step drilling molding; forming a buffer hole, a main explosion hole and a cutting hole in turn from outside to inside on the surface layer of the foundation pit; arranging segmented stick dynamites and non-electric millisecond difference detonators in the buffer hole, the main explosion hole and the cutting hole, wherein the non-electric millisecond difference detonators are connected with the instant electric detonators; after all the instant electric detonators are connected with each other in series, connecting all the instant electric detonators to a trigger; igniting a plurality of rows of blast holes at the same time and detonating the presplit hole, the cutting hole, the main explosion hole and the buffer hole in turn; after blasting, performing digging and transportation and wall surface timbering in sequence; blasting step by step to the bottom of a preset foundation pit; and manually repairing and scattering the bottom of the foundation pit. The method has the advantages of little construction difficulty, high protection safety, short construction period, stable engineering project quality and excellent comprehensive benefit.

The invention discloses a display panel and a display device. The display panel comprises a substrate, a plurality of sub-pixels and a color film layer, each sub-pixel comprises an opening area and anon-opening area. The color film layer comprises a plurality of color resistance blocks; the sub-pixels comprise first sub-pixels; the color resistance blocks comprise a first color resistance block;the first color resistance block corresponds to the first sub-pixel; the first color resistance block comprises a first light-transmitting part and a second light-transmitting part; the projection ofthe first light-transmitting part on the plane where the substrate is located is at least partially overlapped with the projection of the opening area of the first sub-pixel on the substrate; the projection of the second light-transmitting part on the plane where the substrate is located is at least partially overlapped with the projection of the non-opening area of the first sub-pixel on the substrate, and the transmittance of the first light-transmitting part to the light of the first color is larger than that of the second light-transmitting part to the light of the first color. According to the display panel and the display device provided by the invention, the reflection of external ambient light is reduced, and the light extraction rate of the display panel is increased.

The invention provides a gel tissue plugging material and a preparation method thereof, and a plugging product. The gel tissue plugging material comprises: a matrix, wherein the matrix comprises a gellayer; and a wet-state adhesion layer on at least one surface of the matrix, wherein at least one surface of the matrix contacts an adhesion solution to obtain the wet-state adhesion layer, the adhesion solution contains an amino compound and a buffer liquid, and the amino compound is dissolved in the buffer liquid. According to the present invention, the gel tissue plugging material has advantages of excellent adhesion property, excellent bursting strength, suitable elongation at break and good elasticity, and can be effectively adhered to the surface of organisms or substantial organs so asto provide tissue plugging effect.

The invention discloses a multifunctional module type soil pressure applying and forming device. The forming device comprises a top frame, a pressure applying forming module and soil body strength detection devices, is characterized in that baffles are arranged on the periphery of the top frame, and the pressure applying forming module comprises a plurality of convex bodies; filter devices are further arranged on the part, in contact with the soil body, of the module, and reinforcement bodies sleeve the filter devices; the upper part of the module and a top plate form a vacuum water collectingchamber, and the module is provided with water guide channels; and the top frame and / or the pressure applying forming module are further provided with auxiliary pressure applying devices, the bottomsof the convex bodies are further provided with vertical pile bodies. According to the device, the soil body can be subjected to rapid drainage, consolidation and forming, the device is suitable for shallow layers, middle layers and deep layers treatment, and therefore the device is wide in applicability, high in construction efficiency, short in construction period and low in construction cost.

The invention discloses a discharge dust removing device of an agricultural wheat harvester. The device comprises a dust removing box; a feed pipe is fixedly connected to the middle point of the top of the dust removing box; the bottom of the feed pipe penetrates through the dust removing box, and extends therein; the inner wall of the dust removing box is fixedly connected with a dustproof screenplate; and the right side of the bottom of the dustproof screen plate is fixedly connected with a vibrator. Through cooperation of the dustproof screen plate, the vibrator, an electric extension rod,a push plate, a discharge port, a first air blowing motor, a first air blowing rotating shaft, a first air blowing blade, a forward and reverse motor, a forward and reverse rotating shaft, a drum, abaffle plate, a slide rod, a slide block, a second air blowing rotating shaft, a second air blowing blade, a return spring, a semicircular ring, a steel wire rope, a dust removing pipe, an air suckingcover, an air blower and an air sucking pipe, the device achieves excellent dust removing effect, can effectively and thoroughly remove dust in wheat without needing secondary manual dust removal tosave both time and manpower, and achieves more convenience to farmers.

The invention discloses down products with penetration resistance and a manufacturing method thereof and a manufacturing method of a down jacket. The manufacturing method of the down products with penetration resistance comprises the following steps: cutting out terylene cloth and inviscid non-woven interlining; sewing up the terylene cloth and the inviscid non-woven interlining together to form abag-shaped composition body of the terylene cloth and the inviscid non-woven interlining; filling down feathers to the bag-shaped composition body of the terylene cloth and the inviscid non-woven interlining; completely sewing up the bag-shaped composition body of the terylene cloth and the inviscid non-woven interlining to manufacture into the down products with penetration resistance. In the manufactured down products with penetration resistance, the terylene cloth completely wraps up the down feathers and is between the down feathers and the inviscid non-woven interlining; and the inviscidnon-woven interlining completely wraps up the terylene cloth. The invention can effectively realize the function of penetration resistance.

The invention belongs to the field of circuit board processing and discloses a method for press fitting a thick copper printed circuit board. The method comprises the following steps of: filling an etched area of the inner-layer board of the printed circuit board with copper and arranging an air discharge duct on an enclosed block formed by filling the copper; performing brown oxide; cutting a prepreg and a copper foil and riveting the inner-layer board and the prepreg by using rivets in an overlapped manner to achieve laminated positoning; prearranging the inner-layer board; stacking boards; performing hot pressing and cold pressing treatment; and drilling a mark hole. After the etched area is filled with the copper, the residual copper rate of the inner-layer board is at least increased by 5 to 10%. Thus, the filling effect of the inner-layer board is obviously enhanced; a technology problem of press fit cavities is effectively relieved, and a decrease in the voltage withstand capability of a product is prevented. The air discharge duct arranged after the copper is filled guarantees good flow of the prepreg in a press fitting production process.

The invention discloses a continuous conveying type sorting device for fruits and vegetables. The continuous conveying type sorting device for fruits and vegetables comprises a sorting rack, a rollerconveying belt and a sorting assembly. The roller conveying belt is arranged in one end of the sorting rack. The sorting assembly is arranged above the roller conveying belt and comprises push platesand induction switches. Each push plate is fixedly connected with a push block. Each push block is connected with an output rod of an air cylinder in a hinged manner. Each air cylinder is fixedly connected with an air cylinder bracket. The air cylinder brackets are in bolt connection with the sorting rack, and in addition, each air cylinder bracket is fixedly connected with a stand column. Each stand column is fixedly connected with a sliding rod. Each sliding rod is connected with a rotating block in a sleeved manner and is in sliding fit with the corresponding rotating block. Each rotating block is fixedly connected with the corresponding push plate. Slide ways are fixedly connected with the other end of the sorting rack. The continuous conveying type sorting device is simple in structure and convenient to mount; the device aims at solving the problem that after being ripe, colors of the various types of fruits and vegetables change; identification is conducted through the inductionswitches, and the air cylinders are driven to push the push plates; the ripe fruits and vegetables can be well pushed into the slide ways and material barrels; and the device is easy to operate and high in sorting efficiency.

The invention discloses a self-deoiling type water surface oil stain adsorption ball, and belongs to the technical field of water body pollution treatment. According to the invention, an adsorption ball body provided with an oil absorption cotton material can rapidly adsorb oil stains, and the oil stains adsorbed by the adsorption ball body can be diffused in an oil guide rope and an oil collection ball which are connected with the adsorption ball body and are made of the same material, so that part of the oil stain is guided to the oil collection ball; the oil collection ball is soaked in anoil stain emulsifying agent, the emulsifying agent can emulsify and decompose the oil stain in the oil collection ball and perform automatic deoiling, a specially-made expansion and shrinkage ball anda water guide net set matched with the specially-made expansion and shrinkage ball are arranged, and the water guide net set can guide water to the expansion and shrinkage ball, so that the expansionand shrinkage ball can achieve automatic repeated expansion and shrinkage; and the adjacent expansion and shrinkage balls intermittently extrude the oil collection ball between the expansion and shrinkage balls to extrude out oil stains adsorbed in the oil collection ball, so that deoiling is accelerated, the adsorption balls can adsorb and deoil at the same time, the oil adsorption capacity of the adsorption balls is greatly improved, and then the treatment efficiency is greatly improved.

The invention discloses an environment-friendly bamboo fiber material which is prepared from the following raw materials in parts by weight: 30-40 parts of polylactic acid, 10-18 parts of poly (butylene succinate), 20-30 parts of modified bamboo fiber, 10-15 parts of a plasticizer and 2-3 parts of an antibacterial agent; the invention further discloses a preparation method of the environment-friendly bamboo fiber material, and the preparation method comprises: step 1, sealing and placing; step 2, mixing; step 3, after being cooled, crushing the mixture into particles through a strong crusher,and pouring the particles into a hot-pressing mold; and step 4, carrying out hot pressing. According to the invention, the polylactic acid and the poly (butylene succinate) are used as a matrix of materials, and are both biodegradable resin, and the mechanical property and the heat resistance of the composite material can be improved by enhancing effect of the modified bamboo fiber; meanwhile, dueto the addition of the plasticizer, the composite material not only has relatively high strength, and the elongation at break and the water resistance are good; due to the addition of the antibacterial agent, the composite material is not easy to mildew, and the service life of the composite material can be effectively prolonged.

The invention relates to the field of plate processing and particularly discloses a plate bending device. The device comprises a frame, a pressing hydraulic cylinder, a cutting mechanism, a workbench,a punch and a punching hydraulic cylinder, wherein a punching channel is arranged in the workbench; a fixing seat is fixed on a push rod of the pressing hydraulic cylinder; the cutting mechanism comprises a rotating shaft, a rotating disk, a motor, a collecting box and pressing blocks; the rotating shaft penetrates through the pressing block; a discharge hole is formed in the collecting box; a filter screen is fixed in the collecting box; a cavity communicated with the collecting box is arranged in the rotating shaft; sliding cavities are arranged in the pressing block; pistons are arranged in the sliding cavities; piston rods are fixed on the pistons; cams are fixed on the rotating shaft; first springs are arranged in the sliding cavities; air inlet check valves and air outlet check valves are fixed on side walls of the sliding cavities; sliding-out grooves are arranged in the rotating disk; second springs and polishing pieces are arranged in the sliding-out grooves; and suction holes are formed in two sides of the rotating disk. According to the scheme, the device has the advantages that chips generated by cutting can be cleaned in time and scratches on plates are avoided.

The invention belongs to the technical field of coal mine safety, and patricianly relates to multifunctional liquid foam used for an underground coal mine and a using method of the multifunctional liquid foam. The multifunctional liquid foam used for the underground coal mine comprises, by mass, 0.5-10% of crystal whisker stopping agents, 0.5-30% of quaternary ammonium salt cationic surface active agents, 0.5-30% of non-ionic surface active agents and 0-10% of additives, the balance of water. The multifunctional liquid foam preparation method and using method are simple, bring convenience for use and manual operation, and are strong in applicability because of being suitable for mines rich in acid gases like sulfuretted hydrogen and sulfur dioxide, tunnels with large coal spontaneous combustion tendency, mine working faces and the like and particularly suitable for mine goaves.

The invention discloses an inorganic gel profile control technology. Various profile control water shutoff agents are used and comprise a weak gel profile control agent, an inorganic gel profile control agent, a pre-crosslinking particle profile control agent and an oil-displacing agent, wherein the weak gel profile control agent comprises cross-linked polymers HPMA (hydroxypropyl methacrylate), a cross-linking agent, a stabilizing agent and a delay agent; the cross-linked polymers HPMA are partially hydrolyzed polyacrylamides; the cross-linking agent is a composite system of formaldehyde and resorcinol; the inorganic gel profile control agent is an inorganic mixing body using metasilicic acids as main ingredients and is matched with the pre-crosslinking particle profile control agent to be used in the profile control process; the pre-crosslinking particle profile control agent is a synthetic flexible macromolecule material containing a great number of hydrophilic groups; and the oil-displacing agent is a surfactant with amphiphiles. The inorganic gel profile control technology has the advantages that various profile control water shutoff agents using the inorganic gel as a main body extend to the inside of an oil reservoir to block a high-permeability zone, so that the direction of fluid is converted; injected water affects medium-low-permeability zones which are not affected in the prior art; the displacement effect is improved; and the recovery ratio is improved.

The invention provides a method for growing a quantum well stress release layer of an epitaxial structure and the epitaxial structure. The epitaxial structure comprises the quantum well stress release layer with the total thickness of 160nm. The quantum well stress release layer is an HT MQW layer doped with In and Al and comprises a GaN layer with the thickness of 40nm and an AlyInxGa(1-x-y)N layer with the thickness of 2nm, wherein x ranges from 0.05 to 0.08, and y ranges from 0.02 to 0.05. According to the growing method, by modifying the energy band diagram of the HT MQW, electrons entering a luminous zone can be blocked, and the probability that the electrons enter a p layer and are recombined with holes in a nonradiative mode is reduced; moreover, the electrons blocked in the HT MQW are injected into the luminous zone more evenly through two-dimensional diffusion, the efficiency of the recombination between the electrons and the holes is promoted, and the luminance is improved.

The invention provides an aluminum bar low position bar feeding device applied to the technical field of aluminum profile production and processing. The bar placing surface (10) of a bar placing frameof the bar placing frame (1) of the aluminum bar low position bar feeding device is arranged of an inclined structure, a material stirring disc movably mounted on the side face of the bar placing frame (1) is connected with a bar overturning and supporting oil cylinder (3), and the bar overturning and supporting oil cylinder (3) is mounted on the side face of the bar placing frame (1); the bar overturning and supporting oil cylinder (3) is connected with a control part (4), and a lifting frame (5) is arranged at the end portion of one end of the bar placing frame (1); a bar feeding oil cylinder (6) is mounted on the lifting frame (5), and a bar input idler wheel (8) is arranged on the upper part of a feeding machine frame (7); and a bar supporting swing arm (9) is connected with the bar feeding oil cylinder (6). The aluminum bar low position bar feeding device has a simple structure, and a long aluminum bar can be conveniently, reliably and automatically transported from the bar placing frame into a heating furnace, low position bar feeding can be realized, so that the lifting and lowering height of the long aluminum bar is lowered, and the safety hazard of the heating operation of the long aluminum bar is eliminated.

The invention discloses a circuit breaker closing and locking device which comprises an insulating shell, a closing push rod, a return spring and a locking body. A top wiring seat and a bottom wiringseat are arranged on the upper surface and the lower surface of the insulating shell, the top wiring seat is electrically connected with conductor rods inside the insulating shell, upper contacts arearranged at the bottoms of the conductor rods, a lock key is arranged on the lower portions of the conductor rods, lower contacts which are matched with the upper contacts are hinged onto the lock key, an end of the lock key is connected with the closing push rod by the return spring, the closing push rod is inserted in the insulating shell, the locking body is arranged inside the insulating shell, is positioned on the upper portion of the closing push rod and comprises an electromagnet, an electromagnetic coil and a movable electromagnet iron core, the electromagnet is arranged inside the locking body, and the electromagnetic coil is wound on the surface of the electromagnet. The circuit breaker closing and locking device has the advantages that the circuit breaker closing and locking device with double locking devices is high in closing and locking safety, circuit faults can be conveniently checked by staffs, and timely maintenance can be facilitated.

The invention discloses a lifting platform for new energy vehicle maintenance. The lifting platform for new energy vehicle maintenance comprises a motor installation plate. The lower end of the motorinstallation plate is fixedly provided with a servo motor. The end of an output shaft of the servo motor is fixedly provided with a first chain wheel. The first chain wheel is in transmission connection with second chain wheels. The second chain wheels are fixed to the upper ends of first lead screws. Transmission nuts are in transmission connection with the first lead screws in a threaded manner.The transmission nuts are embedded into lifting blocks. The two sides of each lifting block are both provided with guide sleeves in a nested manner. Guide rods are connected into the guide sleeves ina sliding manner. The upper ends of the guide rods are fixedly provided with upper connection plates. The lower ends of the guide rods are fixedly provided with lower connection plates. Wheel rails are arranged on one side of the lifting blocks. The front ends of the wheel rails are provided with locating mechanisms. Clamping mechanisms are arranged at the back ends of the wheel rails. The lifting platform for new energy vehicle maintenance achieves ascending and descending of vehicles and is simple in structure and convenient to operate and maintain; and besides, fixation of a vehicle is achieved, so that the safety is improved.