18results about How to "Avoid blackening" patented technology

This invention discloses an electrically controlled cargo box heating device, method, and mining dump truck, including a heating box, a smoke baffle assembly, an electronic control device, a sealing pipe, an exhaust tailpipe assembly, and a cargo box. The heating box includes a box panel, a smoke baffle slide, an electronic control bracket, an air inlet, an exhaust outlet, and a heating outlet. The electronic control device includes a control unit, an electric push rod, and a lifting cylinder. This invention uses an electronic control system to reverse the engine exhaust during cargo box lifting and lowering, utilizing the high-temperature exhaust gas from the engine to heat the cargo box, achieving waste gas reuse and solving efficiency and safety issues caused by frozen cargo box materials in low-temperature environments. The simple mechanical structure ensures stable reliability, and the electronic control system ensures the orderly operation of each component. Operating the cargo box while disconnecting the heating channel for normal exhaust avoids cargo box blackening and carbon dust dispersion, ensuring a good vehicle appearance and driving environment while heating the cargo box.

This disclosure relates to the photovoltaic field, providing a photovoltaic cell and its manufacturing method, as well as a photovoltaic module. The manufacturing method of the photovoltaic cell includes: placing a substrate in a support structure, at least one surface of the substrate including a plurality of mutually spaced first regions, the first regions being located at the edges of the surface; forming a semiconductor layer on the surface; performing a diffusion process on the semiconductor layer to convert the semiconductor layer into a doped layer, and forming a protective layer on the side of the doped layer away from the substrate; wherein, in the step of forming the semiconductor layer, nitrogen gas and silane are introduced into a reaction chamber used to prepare the semiconductor layer, and the ratio of the nitrogen gas flow rate to the silane gas flow rate is controlled to be 0.7~1; and / or, the diffusion process includes sequentially performed oxygen-free annealing and oxygen-containing annealing, the ratio of the oxygen-containing annealing duration to the oxygen-free annealing duration being greater than 1. This disclosure at least helps to avoid excessive erosion of the doped layer located on the first region.

This utility model discloses a clamp for welding and fixing stainless steel pipe fittings, including a chuck for holding the stainless steel pipe fittings. The chuck is mounted on the output end of a hollow motor. An air intake mechanism is installed inside both the chuck and the hollow motor to fill the stainless steel pipe fittings with argon gas. The air intake mechanism includes an air intake pipe with its outlet located inside the stainless steel pipe fitting. The air intake pipe is slidably disposed within a sliding sleeve, which is fixedly installed within a ring plate. The ring plate is fixedly connected to the end of the hollow motor away from the chuck. This utility model provides a clamp that, when using the chuck to hold the pipe fittings for rotary welding, can supply argon gas into the pipe fittings, achieving back-side argon filling and sealing protection of the weld area.

The invention relates to the technical field of pelletizers, and discloses a PPS plastic pelletizer which comprises an extrusion cylinder, a mold, a melting cylinder, a feeding port, a discharging port, two electric valves, a heater, an extraction and purification device, a stirring device, a scraping device, a controller and the like, the mold communicates with the extrusion cylinder, the bottom of the melting cylinder is fixedly connected with the top of the extrusion cylinder and communicates with the extrusion cylinder, and the bottom of the melting cylinder communicates with the discharging port. The extraction and purification device is connected with the melting barrel, the stirring device is connected with the melting barrel and the extraction and purification device, and the scraping device is connected with the melting barrel and the stirring device. And the situation that waste gas in the melting cylinder is continuously accumulated, the pressure in the melting cylinder is increased, and the plastic melting quality is affected is prevented, the exhausted waste gas is exhausted after being purified through the purification box, and the waste gas is prevented from affecting the environment and workers.

The invention discloses a preparation method of high-purity anhydrous indium sulfate, which belongs to the technical field of chemistry and chemical engineering, and creatively comprises the steps of acid leaching of an indium strip, multiple times of evaporation and concentration until the pH value is 2-3, evaporation, crystallization and concentration, washing, drying and thermal decomposition, so that the problems of blackening and yellowing in an anhydrous indium sulfate product are effectively solved, the particle compactness is improved, and the yield is improved. The method provided by the invention has the advantages of low production cost, simplicity in operation and wide application prospect.

The present invention discloses a coal-to-liquid tail oil processing equipment, including a vacuum tower and a regulating pipe, the vacuum tower has an input port, a diesel extraction pipeline, a heavy diesel extraction pipeline and a bottom oil pipeline, the vacuum tower is connected with a front-end device through the input port, the front-end device transports the oil product into the vacuum tower through the input port, the input end of the diesel extraction pipeline is connected with the upper part of the vacuum tower, the input end of the heavy diesel extraction pipeline is connected with the middle part of the vacuum tower, the input end of the bottom oil pipeline is connected with the bottom of the vacuum tower, the regulating pipe connects the heavy diesel extraction pipeline with the bottom oil pipeline, and a regulating valve group is provided on the regulating pipe. The present invention also discloses a coal-to-liquid tail oil processing method. The coal-to-liquid tail oil processing equipment and method provided by the present invention can quickly adjust the condensation point of the extracted wax oil, is convenient for adjustment and control, is safer, and can ensure the stability of the quality of the wax oil extracted from the bottom of the vacuum tower.

The present invention provides a laser welding shielding gas nozzle structure and a welding device, belonging to the field of laser welding technology, including a nozzle body, and a first channel for a laser beam and shielding gas to pass through is provided inside the nozzle body, the nozzle body includes a first connection structure and a second connection structure connected in sequence, and a first gas outlet is provided on the first connection structure, and a plurality of second gas outlets are provided on the second connection structure, and the plurality of second gas outlets are used to make the shielding gas scatter outward in an umbrella shape to protect the laser beam ejected from the first gas outlet. Compared with the prior art, the laser welding shielding gas nozzle structure and the welding device of the present invention are provided with a plurality of gas outlets, which expands the protection range of the shielding gas, and at the same time, the plurality of second gas outlets are used to make the shielding gas scatter outward in an umbrella shape to protect the laser beam ejected from the first gas outlet, thereby avoiding yellowing or blackening of the weld spot during laser welding, and ensuring the welding effect.

The utility model discloses a fire-fighting smoke exhaust fan with cooling and dedusting functions, which comprises a shell, a first water tank, a second water tank and a smoke exhaust component, the first water tank is mounted at the bottom of an inner cavity of the shell, the second water tank is mounted at the top of the inner cavity of the shell, and the smoke exhaust component is arranged between the first water tank and the second water tank. The smoke exhaust assembly comprises an air inlet, a cooling mechanism, a first cold and heat exchange pipe, a second cold and heat exchange pipe, a first water pump, a second water pump, a watering plate, a third water pump, an air draft mechanism, a supporting rod, a driving motor, fan blades, an air outlet, a water inlet, a protection cover and a water outlet. According to the fire-fighting smoke exhaust fan with the cooling and dust removing functions, exhausted smoke is cooled through the cooling mechanism in the smoke exhaust assembly, the smoke can be cooled, the situation that the working environment temperature of a driving motor is too high due to the effect of high-temperature smoke of an air draft mechanism is avoided, particles in the high-temperature smoke are removed, and the service life of the driving motor is prolonged. The inner wall of the pipeline is prevented from being blackened by high-temperature smoke.

The LED packaging device comprises a support, a chip, a first packaging adhesive layer, a second packaging adhesive layer and a light blocking layer, a groove is formed in the upper end of the support, the chip is located in the groove, the upper end of the chip protrudes out of the upper portion of the groove, the chip is covered with the first packaging adhesive layer, the gap between the chip and the groove can be filled with the bottom of the first packaging adhesive layer, and the second packaging adhesive layer is located in the groove. The outer surface of the first packaging adhesive layer is an arc-shaped convex surface, and KSF fluorescent powder is contained in the first packaging adhesive layer; the bottom surface of the second packaging adhesive layer is tightly connected with the outer surface of the first packaging adhesive layer and the upper surface of the bracket, and the top surface of the second packaging adhesive layer is horizontally arranged; the light blocking layer is cylindrical and covers the second packaging adhesive layer. According to the scheme, the method for manufacturing the LED packaging device is used for manufacturing the LED packaging device, the light emitting angles of the LED device in all directions are consistent, the adhesive layer is not prone to being stripped from the support, and the KSF powder is not prone to making contact with moisture in air to cause blackening.

The invention belongs to the field of aluminum alloy welding, discloses a method for preventing local blackening of a welding seam after anodizing of an aluminum alloy part, and is used for the situation that anodizing is needed after the aluminum alloy part is welded. The method comprises the following steps: carrying out chemical cleaning treatment on a to-be-welded part of the aluminum alloy part before welding, and removing an oxide film and oil stain at the to-be-welded part; the aluminum alloy parts are combined on an assembly clamp, the relative position relation of the aluminum alloy parts is guaranteed, and positioned welding is conducted through an argon tungsten-arc welding method; correcting positioned welding deformation; welding of welding seams of the aluminum alloy parts is completed through an argon tungsten-arc welding method, and an arc suppression method is controlled; the part is taken down from the assembly clamp; and anodizing the part. The problem of local blackening of the welding seam after anodizing of the aluminum alloy part can be effectively solved.

The utility model provides an anti-carbonization dust collection box structure, and relates to the technical field of circuit board cutting. Comprising a waste box body, a dust collection cover and a dust collection pipeline, the bottom end of the dust collection cover is located in the waste box body in an up-down movable mode, a connecting hole is formed in the top end of the dust collection cover, and the connecting hole is used for being fixedly connected with a jacking block of circuit board cutting equipment so as to ascend along with the jacking block to reduce a gap between the connecting hole and a circuit board to be cut. The dust collection device is simple in structure and reasonable in design, the dust collection cover is arranged to be connected with the waste box body in an up-down movable mode, meanwhile, the dust collection cover is fixedly connected with a jacking block of circuit board cutting equipment, the waste box body is provided with a dust collection pipe inlet, and the dust collection pipe inlet is used for being connected with the dust collection pipeline. The gap between the dust collection box structure and a cut product can be greatly reduced, so that the problem of blackening of the product in the laser cutting process is effectively avoided, and the laser blackening yield is effectively increased.

The invention belongs to the technical field of food processing, and provides a production method of raw salt field shrimps and a product thereof. The soaking solution contains the green tea extracting solution, so that the fishy smell can be effectively removed, the uncooked shrimps can be bright and glossy, the shelf life of the product is prolonged, and fading and blackening of the product are avoided. The method provided by the invention is simple in process, short in production cycle and low in energy consumption, and the processed product has the taste similar to that before freezing after being unfrozen, and is crisp and elastic in taste after being unfrozen, rich in shrimp flavor and free of fishy smell. The product is free of preservatives, has various indexes meeting the standards of uncooked food products, and is safe, reliable, green and healthy.

The invention relates to the technical field of data lines, and discloses a multi-connector data line which comprises a winding device. When the output end needs to be used, a second pulling disc is pulled to drive a second pulling rod and a second limiting column to move out through a second limiting groove, the second limiting column is moved to extrude a third spring, and when the second limiting groove in a moving column is not limited, the output end is clamped into a containing groove, and the output end is clamped into the containing groove; and when a second limiting groove of the moving column descends to the position of a second limiting column, the second limiting column is bounced into the position of the second limiting groove through an extruded third spring, the moving column and the fourth spring are limited, the structure is simple, operation is convenient, and practicability is high. The connecting wire is wound through the winding device, use convenience is guaranteed, the connecting wire is cleaned through the cleaning ring, the blackening phenomenon caused by long-time use is avoided, the output end is limited through the limiting block, and the falling phenomenon in the carrying process is avoided.

This invention relates to the field of laser cutting technology and discloses a laser cutting device for copper plates used in copper crafts processing. The device includes a laser cutting machine housing and a laser cutting head. Y-axis linear motors are mounted on both sides of the top of the laser cutting machine housing, and a portal frame is positioned between the Y-axis linear motors. An X-axis linear motor is fixed to one side of the top beam of the portal frame. The laser cutting head is fixed to one end of the slide. A fixing ring is fixed to the lower half of the outer wall of the laser cutting head, and an external gear ring is fixed to the outside of the fixing ring. This invention achieves a 360° adjustable preheating and rapid cooling mechanism around the laser cutting head, allowing it to follow the cutting direction of the laser cutting head in real time. This ensures that the electric heating plate always precisely covers the area to be cut, and the hollow water-cooled housing always precisely covers the cutting area, achieving seamless integration of preheating, cutting, and rapid cooling. This maximizes the effects of preheating and rapid cooling, further improving cutting accuracy and cut quality.

The utility model discloses a mushroom drying system which is characterized in that the mushroom drying system comprises a drying box and a drying cart, and the interior of the drying box is divided into a primary drying section with the temperature kept at 35-40 DEG C, a constant-speed drying section with the temperature kept at 40-50 DEG C and a complete drying section with the temperature kept at 50-60 DEG C; and a plurality of groups of trays for drying shiitake mushrooms are arranged on the drying cart in an overlapping manner. According to the utility model, a continuous heating drying mode is adopted, the initial temperature is 35 DEG C, the highest temperature does not exceed 60 DEG C, and the continuous heating drying mode is adopted, so that the shiitake mushrooms can be prevented from being blackened and scorched.

The invention relates to the technical field of silver paste passivators, in particular to a silver paste passivator and a preparation method thereof, and the preparation method comprises the following steps: weighing the following raw materials in parts by weight: 2-5 parts of a metal chelating agent, 8-15 parts of a composite solvent, 3-8 parts of a wetting dispersant, 20-25 parts of a coupling agent, 15-20 parts of an arrangement agent, 12-16 parts of a pH regulator, 5-8 parts of a modified silicon dioxide agent, 6-15 parts of an adhesion promoter and 1-3 parts of an anti-vulcanizing agent. According to the silver paste passivator, the metal chelating agent, the composite solvent, the wetting dispersant and other functional auxiliaries are adopted, meanwhile, the modified silicon dioxide agent is added for blending and coordinating, through the co-matching and synergistic effect of the raw materials, the prepared silver paste passivator is remarkable in glossiness performance, adhesive force and impact resistance coordinating effect, and the service life of the silver paste passivator is prolonged. Meanwhile, the weather-resistant stability effect of the product is remarkable.

The utility model provides a touch control structure, a display device and vehicle-mounted equipment thereof, and relates to the technical field of touch control sensors, the touch control structure comprises a first polarized light unit, a second polarized light unit and a metal grid touch control unit, the metal grid touch control unit is arranged between the first polarized light unit and the second polarized light unit; or the metal grid touch control unit is arranged at the lower parts of the first polarization unit and the second polarization unit. According to the touch display panel, the original touch display Out cell structure is improved, and the situation that a picture displayed by the touch display panel is black or rainbow lines appear is avoided.

The invention relates to the technical field of welding, and discloses oil cup welding equipment and an oil cup welding method.The welding equipment comprises a welding tool, the welding tool comprises a support, a positioning mechanism and a fixing mechanism, the positioning mechanism comprises a positioning seat, a gap is formed between the positioning seat and a welding point, and a plurality of air outlet channels communicated with the gap are formed; a height difference is formed between the air outlet channel and the welding point; the laser welding machine is used for welding the oil cup; the cooling assembly comprises a nitrogen tank and a controller, the nitrogen tank is connected with the controller, a gas supply channel communicated with the gas outlet channel is formed through the controller, and the controller is electrically connected with the laser welding machine and can connect or disconnect the gas supply channel according to signals of the laser welding machine; when the gas outlet channel is filled with nitrogen, the nitrogen firstly flows to the side wall of the oil cup along the gas outlet channel and then flows to a welding point from the side wall. According to the oil cup welding equipment and the oil cup welding method, the structure is simple, and the phenomenon of insufficient welding of the oil cup can be avoided.