39results about How to "Control penetration" patented technology

The invention discloses sliver electrode slurry for a back electric field of a silicon solar cell and a preparation method thereof, and the silver electrode slurry for the back electric field of the silicon solar cell comprises the following components by weight percent: 60-70% of spherical silver powder, 0-5% of flaky silver powder, 2-6% of glass powder with a high-temperature softening point, 1-3% of glass powder with a low-temperature softening point and 20-30% of organic bonding agent. The particle size of the spherical silver powder is 0.5-2.5 mu m, and the tap density is above 4.5g/ml; the particle size of the flaky silver powder is below 5 mu m, and the tap density is above 4.0g/ml; and the glass powder with the high-temperature softening point is a PbO3-B2O3-SiO2-ZnO glass system, and the glass powder with the low-temperature softening point is a Bi2O3-B2O3-SiO2 glass system. The slurry is applied to a sliver electrode of the back electric field of the silicon solar cell; furthermore, after fast high-temperature sintering by a chained belt furnace, the adhesive capability is strong, the soldering resistance is good and the photoelectric conversion efficiency of a product is high.

The invention relates to a process for preparing drilling fluid, in particular to a process for preparing the drilling fluid for preventing polycrystalline diamond compact (PDC) bit balling. The process comprises a construction process and a dosage formula of treating agents and is characterized in that: according to the dosage formula, the treating agents are prepared by mixing clear water polymer original slurry, poly anionic cellulose (PAC), calcium carbonate (QS-4), carboxymethyl starch (CMS), sulfonated phenolic resin(SMP-2), water dispersible cation emulsified asphalt powder (SFT-1), sodium chloride(NaCL) and sodium formate (WT-1) in a mass ratio of 1,000:2-3:30-40:20-30:2-3:1.5-2:50-100:20; and the construction process comprises the following steps of: according to a circulation circle, uniformly mixing a coating agent PAC, a filtrate reducer CMS, a salt and high-temperature resistant filtrate reducer SMP-2 and an anti-sloughing lubricant SFT-1 for 12h at first; adding QA-4, NaCL, WT-1 into the mixture and uniformly mixing the mixture; and regulating the mixture to have a density Rho of 1.06 to 1.10g/cm<3>, a funnel viscosity T of 38 to 45s and an API water loss FL of 4 to 6ml. The process has the advantages of effectively preventing the balling of a sticking bit and a PDC bit at a lower curved section, reducing a frictional resistance and a torque, eliminating a sticking phenomenon, improving a mechanical drilling rate and ensuring downhole safety.

The invention discloses a method for preparing polyurethane resin for high-wearing-resistance working gloves. The method comprises the following steps: (I) performing a pre-polymerization reaction on poly dihydric alcohol and isocyanate at a mole ratio of (0.5-2.0):1; (II) adding an additive and a dihydric alcohol chain extender, and continuously heating to enable a prepolymer to react with the dihydric alcohol chain extender; (III) adding the isocyanate to perform a reaction continuously, and in the reaction process, gradually adding a solvent and an additive in the system; and (IV) when meeting preset viscosity, adding micromolecule monohydric alcohol to terminate the reaction, adding an additive and a small amount of solvent, and sufficiently and uniformly stirring. As the poly dihydric alcohol is added to react with a part of isocyanate firstly, and the prepolymer which is ended by isocyanate groups is generated, soft sections and hard sections of the polyurethane resin can be sequentially arranged, the curing speed and the pore sizes of the resin can be controlled, the permeation degree of the resin in a glove core can be controlled, and thus the purposes that a glove is high in wearing resistance and easy to separate from a mold can be achieved.

The invention discloses a multi-wire (solid or flux-cored) bead welding system adopting an inert gas protection or submerged arc method, and a process of the multi-wire bead welding system. The multi-wire bead welding system and the process of the multi-wire bead welding system are used for replacing surfacing with band-electrode to obtainer higher production efficiency. The multi-wire bead welding system comprises a welding gun swing mechanism (11), a multi-wire welding gun (6), a wire-feeding pipe (4) and at least two wire-feeding machines (5). Compared with traditional bead welding, the multi-wire bead welding is higher in deposition rate. Due to the fact that a lap joint area of multi-wire bead welding is soother than that of traditional bead welding, the machining time needed to obtain a smooth surface is largely shortened. A machine head of the multi-wire bead welding system can swing in the welding process, the fusion ratio between bead welding materials and wood is improved while a wider weld joint is obtained, and the unique swing function can guarantee a bead welding layer to be more uniform.

The invention discloses a microcapsule fire-extinguishing agent. The microcapsule fire-extinguishing agent is composed of, by weight percentage, 82%-95% of a capsule inner core main material, 0%-5% of an additive and 2%-15% of a capsule shell, wherein the capsule inner core main material is an aqueous solution of water-soluble inorganic alkali metal potassium salt and/or water-soluble organic potassium salt; the additive is a mixture including one or more of epoxy resin, phenolic resin, sodium alkyl benzene sulfonate, sodium acrylate, silicone oil, fatty alcohol polyoxyethylene ether sodium sulfate, fatty alcohol polyoxyethylene ether ammonium sulfate, sodium lauryl sulfate and fatty alcohol polyoxyethylene ether; and the capsule shell is made of a colloid shell material. The microcapsule fire-extinguishing agent is safe to use, clean, environmentally-friendly, high in fire-extinguishing efficiency and wide in application range.

The invention relates to a welding method, a product and an application of a dissimilar metal. The welding method of the dissimilar metal comprises a high-melting-point material to be welded and a low-melting-point material to be welded, the high-melting-point material and the low-melting-point material are mutually overlapped or connected in a sleeving manner to form a welding seam, the welding seam is welded by the aid of electric arc welding, electron beam welding, laser welding or high-frequency welding, the welding temperature is lower than the melting temperature of the high-melting-point material and higher than the melting temperature of the low-melting-point material, the low-melting-point material is melted to serve as a welding material to seal the welding beam and cooled to form a welding channel, and the width L of the welding channel is larger than or equal to 1.5mm. The melted low-melting-point material directly serves as the welding material to seal the welding beam to form the welding channel with a certain width, so that the melted low-melting-point material and the high-melting-point material are mutually permeated in a certain area range to form solid solution, the permeation quantity of high-melting-point metal to low-melting-point metal is controlled, overall strength sufficiently meets use requirements, more importantly, frangibility of the welding channel is reduced, mechanical properties are improved, the requirements for a welding process are low when welding is performed, and the welding method is easier to control.

The invention discloses a control method and system for a pulse MIG (Metal-Inert Gas) welding electric arc. The method and the system disclosed by the invention has the advantages that the pilot-arc width or the pulse frequency of the pulse MIG electric arc is commonly controlled in a loop-opened feed-forward control mode of a welding-wire feeding speed signal and a loop-closed negative-feedback control mode of an electric arc length signal so as to maintain dynamic balance of the feeding speed and the fusion speed of welding wires and maintain constant electric arc length of the system and a constant jet transient mode of molten drops when welding current adjustment (by adjusting the wire-feeding speed), wire-feeding speed disturbance or arc length disturbance occurs. In addition, the invention also discloses a new process which adopts the method and the system and is used for controlling the fusion depth and the forming of welding seams by adopting a pulsating feeding mode for welding.

The invention provides a liquid crystal displaying device that comprises a backlight module and a liquid crystal displaying panel that is arranged at one side of the backlight module, wherein the liquid crystal displaying panel comprises a first substrate, a second substrate and a liquid crystal layer that is arranged between the first substrate and the second substrate; the second substrate is arranged opposite to the first substrate; the first substrate and the second substrate commonly form a displaying area and a light shielding area that is arranged around the displaying area; the first substrate in the light shielding area is provided with a first electrode layer; and the second substrate is provided with a first light shielding layer and a second light shielding layer. The invention also discloses a driving method that corresponds to the device.

The invention discloses a device and method for controlling chloride ion permeation of reinforced concrete. The device comprises a concrete protection layer and a cathode protection loop, and furthercomprises a monitoring circuit and a porous absorption layer arranged between the concrete protection layer and a protected concrete main body, wherein a liquid inlet is formed in the lower part of the porous absorption layer, and a liquid outlet is formed in the upper part of the porous absorption layer; the monitoring circuit comprises a monitoring power supply; and the two ends of the monitoring power supply are respectively connected with the two ends of another reinforcing steel bar except the protected reinforcing steel bar in the protected concrete main body. The device can directionally move and remove harmful chloride ions in the reinforced concrete and the protection device at the same time, so that the purposes of recovering the function of the reinforced concrete structure andprolonging the service life of the reinforced concrete structure and the service life of an anode of the protection device are achieved. The device is low in energy consumption and simple and convenient to mount; the protection current does not need to be continuously started, so that over-protection of the reinforced concrete structure can be effectively avoided; and the damage to the anode in the using process is reduced, and regular replacement is not needed.

The invention relates to an unequal-thickness resistance spot welding method for a GH4169 nickel-based high-temperature alloy clamp and strap. The method comprises the following specific steps that pre-treatment is carried out, wherein SiC abrasive paper is utilized for roughly removing an oxidization film existing on the surfaces of the GH4169 nickel-based high-temperature alloy clamp and the GH4169 nickel-based high-temperature alloy strap; a spot welding machine loads electrode pre-pressure to achieve close attaching at the welding position of a welded workpiece; the spot welding machine connects welding current to a welding area to carry out welding pre-heating, the welding current is increased gradually until the welding current is stable, the welding pressure is kept, and a weld coreis formed in the welding area; the welding current is cut off, and the welding pressure continues to be kept; and the resistance spot welding machine is utilized for adjusting a welding path to complete welding of the next welding point. According to the method, the problem of welding core deviation easily occurring in the resistance spot welding process of workpieces with different thicknesses is effectively solved, and the welding core quality and the reliability of the resistance spot welding technology are greatly improved. The overall actual use function of the clamp is greatly improved.The accuracy and consistency of welding point positions are ensured.

The waterproof and oil-proof white cardboard comprises a surface layer, a core layer and a bottom layer, the bottom layer is sequentially coated with a bottom coating and a waterproof and oil-proof coating, slurry is subjected to internal sizing firstly, surface sizing is conducted on the surface layer and the bottom layer, and then the surface layer and the bottom layer are subjected to surface sizing; the waterproof and oil-proof coating is prepared from 30 to 40 parts of butyronitrile latex, 10 to 20 parts of silicone acrylic emulsion, 20 to 30 parts of oxidized starch, a starch cross-linking agent, 5 to 10 parts of paraffin emulsion, 0.5 to 2 parts of CMC (Carboxymethyl Cellulose), a preservative and a defoaming agent; the coating of the bottom coating comprises 100 parts of filler, 5-8 parts of carboxylic butadiene-styrene latex, 3-6 parts of biological latex, 1-4 parts of soybean protein isolate, 0.08-0.2 part of a water repellent agent and the like; the bottom layer sizing agent comprises 100 parts of enzyme modified starch and 8-13 parts of polyvinyl alcohol. The back surface of the white cardboard has excellent water resistance and oil resistance, the whiteness and smoothness of the back surface are improved, the overall stiffness of the white cardboard is improved, and the white cardboard is low in cost and relatively environmentally friendly.

The invention discloses a dual laser beam dual side simultaneous welding wire filling droplet transfer monitoring system and method based on high-speed photography. In the process of dual laser beam dual side simultaneous welding wire filling, a droplet transfer mode and frequency are monitored in real-time by a high-speed camera system, so that the purpose of monitoring dual laser beam dual sidesynchronous welding wire filling droplet transfer at different wire feeding speeds in the whole process is achieved. The dual laser beam dual side simultaneous welding wire filling droplet transfer monitoring system mainly includes four parts of a duel laser beam duel side simultaneous welding wire filling system, a high-speed video acquisition and processing system, a full digital wire feeding control system and an image processing system, and is characterized in that the droplet transfer on both sides of a stringer is monitored simultaneously by two high-speed cameras, and the acquired images are processed quickly by the digital image processing software, so that the droplet transfer frequency is calculated quantitatively. According to the dual laser beam dual side simultaneous welding wire filling droplet transfer monitoring system and method, the droplet transfer mode and frequency can be monitored in real time, and thus the weld quality of laser welding is improved.

The invention provides a bipolar radio frequency treatment device capable of adjusting treatment depth. The bipolar radio frequency treatment device comprises at least one or more radio frequency generators, wherein a group of bipolar radio frequency treatment units are formed on each radio frequency generator through unique connection of a first radio frequency electrode and a second radio frequency electrode, the first radio frequency electrodes and the second radio frequency electrodes are arranged in the same direction in a positive sequence and a negative sequence respectively to form a treatment surface, and at least one magnetic field generation mechanism is arranged between the first radio frequency electrodes or/and the second electrodes where the same or/and different radio frequency generators are located. According to the bipolar radio frequency treatment device capable of adjusting the treatment depth, the magnetic field generation mechanisms are arranged on the treatment surface to generate magnetic fields, the degree of closeness and the degree of aggregation of subcutaneous radio frequency current are improved through mutual attraction and mutual repulsion effects of the magnetic fields, so that the degree of penetration and the degree of aggregation of subcutaneous radio frequency energy are controlled, accurate treatment for a treatment area is realized, the treatment time is shortened, and the treatment efficiency is improved.

The invention relates to a mounting and clamping tool and a method for argon tungsten-arc welding by use of the mounting and clamping tool. The method ensures small deformation of pipeline welding and belongs to the technical field of welding processes. A spot welding, circumferential welding and follow-up heat treatment universal integrated tool is designed according to products with different external diameters, mounting, clamping and positioning can be conveniently performed, and meanwhile, surface oxidation of a weld joint, repeated mounting and clamping of the tool, and product deformation are avoided during processing. In the method, 2-4 point equipartition is performed on spot welding parameters through welding programming for symmetric programming; and the circumferential welding process comprises repeated subsection, current from the first section to the last section is in the mode of waveform current, and the average current adopts an inclined mode. Through the programming method, the depth of fusion can be well controlled by the programming method, heat input is reduced to the minimum degree on the premise of guaranteeing the welding depth, the uniformity of the fusion depth is realized, and the ranges of surface oxidation and a heat affected zone are reduced to the utmost extent.