6results 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 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.

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 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.