8results about How to "Prevent thinning" patented technology

This utility model relates to the technical field of methanol range extenders, and discloses a quick connection and cooling interface device for a methanol range extender. It includes a housing, with a methanol engine mounted on the left side of the inner wall of the housing. A fixing mechanism is mounted on the front side of the outer wall of the methanol engine to prevent components from falling off. Multiple fixing plates are equidistantly fixed to the front side of the outer wall of the methanol engine, and a vibration damping mechanism is mounted at the front end of each fixing plate to reduce the impact of vibration on the components. The fixing mechanism includes fixing plates equidistantly fixed to the front side of the outer wall of the methanol engine. A connector is mounted on the outer wall of the methanol engine. In this utility model, a limiting rod is engaged with the inner wall of the limiting plate to form a stable connection, preventing the inner wall of the interface from thinning due to long-term use, and preventing the connector from loosening and falling off due to vibration during vehicle operation, leading to seal failure.

The utility model relates to the technical field of coal mill, specifically is coal mill nozzle ring, including dynamic ring and static ring, wherein: dynamic ring and static ring adopt up and down installation mode, static ring is located above dynamic ring, and the clearance between both is 5mm, further, the dynamic ring outer wall board is changed to curved arc board from traditional vertical flat plate, and the whole is horn mouth shape, the curved arc board design of dynamic ring effectively reduced the flow resistance of hot air in nozzle ring, and the air volume and air pressure of hot air were strengthened, specifically, the shape of curved arc board makes hot air more smoothly flow when passing through nozzle ring, avoids the problem that hot air flow efficiency reduces because of too big wind resistance in the traditional vertical flat plate design, especially, the thickness of dynamic ring is 12mm, guarantees the structural strength and lightens the overall weight simultaneously, thereby reduces the energy consumption when the equipment runs.

[Problem] The present invention aims to provide an aqueous solution for manufacturing electronic devices capable of suppressing defects. [Solution] An aqueous solution for manufacturing electronic devices, comprising: an acid (A); a surfactant (B); and a solvent (C); wherein the acid (A) has a pKa (H2O) of 3.0 or less, and the number of carbon atoms contained in one molecule of the acid (A) is 0 to 8; the surfactant (B) substantially contains no ethylene oxide repeating units and no propylene oxide repeating units; and the solvent (C) contains water (C-1). The aqueous solution for manufacturing electronic devices is a high-performance material that can be used in nanotechnology processes for semiconductor device manufacturing, for example, in manufacturing processes for semiconductor devices for controlling liquid crystals, quantum dots, or OLED displays formed on a substrate.

The utility model provides an electric vehicle parking station which is characterized in that the electric vehicle parking station comprises a storage cavity on the upper layer and a parking chamber on the lower layer, the storage cavity and the parking chamber are separated by a partition plate, and the storage cavity is used for storing granular fire extinguishing materials; the separating plate is provided with a discharging opening, an opening and closing device is installed at the discharging opening and comprises a sliding plate provided with a through hole, the sliding plate is located above the separating plate, the sliding plate can be driven by a driving device to move on the separating plate, and therefore the through hole and the discharging opening are aligned or staggered. Therefore, the discharging opening is opened or closed; when a fire occurs in the parking chamber, the opening and closing device opens the discharging opening, and the granular fire extinguishing materials fall into the parking chamber to extinguish fire. Once a fire occurs, the granular fire extinguishing material can be released to extinguish the fire by opening the discharging opening, and the granular fire extinguishing material can be put back into the storage cavity or a new granular fire extinguishing material can be supplemented after the fire is extinguished, so that the fire extinguishing efficiency is high, and the granular fire extinguishing material can be repeatedly used.

This invention belongs to the field of microwave absorbing materials technology, specifically relating to a carbon composite microwave absorbing material and its preparation method. The invention uses degummed waste filter cotton as a carbon source, employing an impregnation method to impregnate the pretreated waste filter cotton in magnetic metal salts, followed by heat treatment to obtain the composite microwave absorbing material. The carbon skeleton formed by the heat-treated waste filter cotton constitutes a conductive network in the composite material, exhibiting good dielectric loss. Magnetic metal elements and their alloys possess high saturation magnetization, providing magnetic loss in the composite material. The synergistic effect of dielectric and magnetic losses solves the problem of poor impedance matching in single carbon materials. The preparation process of this invention is simple and pollution-free, solving the environmental pollution problems caused by traditional waste filter cotton treatment methods, and is easy for large-scale production. The resulting composite microwave absorbing material is lightweight, efficient, has good impedance matching, and possesses excellent microwave absorption performance.

The present invention relates to a pinhole inspection device using a punch and a die, which is capable of inspecting defects or damages, particularly pinholes or microcracks, caused by forming, immediately after forming is completed using a punch, and a pinhole inspection method using the same.

The invention belongs to the technical field of oil exploitation, and particularly relates to a foaming agent for nitrogen foam fracturing and a preparation method and application thereof. The preparation method comprises the following steps: (1) sequentially adding trimethylolpropane tri (3-aziridinyl propionate), an organic solvent and 1-amino-3, 6, 9, 12, 15, 18-hexaoxaheneicosan-21-acid into a reactor, adjusting the pH value to 2-3 by using hydrochloric acid, and carrying out heat preservation reaction; (2) adding alkyl halide into the reactor, adjusting the pH value to 8-9 by using sodium hydroxide, carrying out heat preservation reaction, irregularly detecting the pH value in the reaction process, and maintaining the pH value to 8-9 by using sodium hydroxide; and (3) carrying out reduced pressure distillation on the mixed solution in the step (2) to obtain a viscous solid, and drying to obtain the foaming agent for nitrogen foam fracturing. The foaming agent for nitrogen foam fracturing has the advantages of good foaming and foam stabilizing effects and large liquid carrying capacity.

This invention provides an integral forming apparatus and method for a corrugated, irregularly shaped thin-walled structure. The integral forming apparatus includes a spoke plate, a core mold, multiple petal molds, and an actuating ring. The core mold has multiple corrugated forming grooves along its circumference. The multiple petal molds are rotatably connected to the spoke plate and are spaced apart along the circumference of the spoke plate. Each petal mold has a boss that matches the shape of the forming groove. The actuating ring is sleeved on the outer periphery of the multiple petal molds and can move axially along the core mold, driving the multiple petal molds to converge towards the forming grooves, thereby forming the blank located between the petal molds and the forming grooves into a corrugated, irregularly shaped thin-walled structure. This invention features a simple process, good integrity, high forming accuracy, suitability for most commonly used thermoforming equipment, fast forming speed, fewer steps, and can greatly improve production efficiency.