11results about How to "To prevent" patented technology

The invention relates to the technical field of laser application, and particularly discloses an online pre-welding treatment and post-welding modification lath laser device which comprises a laser system, a power supply system, a cooling system, a shaping focusing system, a semi-reflecting mirror, a total reflecting mirror, a shielding gas system, a visual sensing system, a welding working platform system and a control system. Continuous laser is generated through the arranged optical fiber laser welding equipment for welding operation, a pulse laser beam generated by the pulse laser is divided into two beams through the semi-reflecting mirror, one beam can be used for removing an oxide layer on the surface of a welding sample on line before welding and exerting prestress on the surface at the same time, air holes are prevented from being generated during welding, cracks are reduced, and the welding quality is improved. And the other beam can be used for carrying out surface cleaning after welding and carrying out laser strengthening modification on a welding seam, so that the quality of the welding seam is improved, and the welding strength is improved.

This utility model relates to the field of electric wire and cable production technology, and in particular to an extrusion coating device for electric wire and cable. This device allows the electric wire and cable to be coated with different materials sequentially during its movement, thereby forming a multi-layer composite structure in a single processing cycle, effectively improving production efficiency and the bonding strength of the coating layers. The extrusion mold is equipped with a thickness control component, including horizontally movable left and right adjustable die lips, which can precisely adjust the size of the discharge hole, ensuring the uniformity and adjustability of the coating thickness to meet the processing needs of electric wire and cable of different specifications. Furthermore, the design of the conical injection channel and stepped transition surface optimizes the flow distribution of the molten material, reducing turbulence and bubble generation, and improving the coating quality. The combined use of the guide sleeve and positioning component accurately guides the electric wire and cable into the extrusion cavity, preventing deviation and ensuring the symmetry and consistency of the coating layers. The overall structure is compact, easy to operate, suitable for continuous production, and has high practicality and economy.

The invention provides a method for rapidly extracting light-color phenolated lignin, and belongs to the field of biomass refining. The method comprises the following steps: uniformly mixing a lignocellulose raw material with a mixed solution of aromatic sulfonic acid and a phenolic compound according to a certain solid-to-liquid ratio, and carrying out ultrasonic treatment at a certain temperature; and after the treatment is completed, carrying out solid-liquid separation, pouring the obtained extracting solution into water to precipitate lignin, and washing and drying to obtain the light-color phenolated lignin. The method disclosed by the invention is simple in process, low in time consumption and high in yield, and the solvent is easy to recycle; the prepared lignin is extremely light in color and high in phenolic hydroxyl group content, retains most of aryl ether bonds, can adjust the content of phenolic hydroxyl groups and methoxyl groups in the lignin to a certain extent, and solves the problems of dark color, few functional groups and low reaction activity of the existing industrial lignin. The method can be used for producing lignin-based functional products without further color reduction and activation treatment.

The invention provides an air conditioner and a control method, the air conditioner comprises an air conditioner body and a fresh air assembly, a heat exchanger is arranged in the air conditioner body, an air outlet of the fresh air assembly communicates with an air channel of the air conditioner body, and gas output by the fresh air assembly flows through the heat exchanger and then is exhausted from the air conditioner body. According to the fresh air ventilator, the technical problem that in the prior art, a fresh air pre-cooling structure is additionally arranged, so that condensate water generated by the fresh air ventilator is recycled, and the cost of the fresh air ventilator is high can be solved.

The utility model relates to lithium battery diaphragm unwinding equipment, in particular to a supporting device. The supporting device is used for supporting a diaphragm roller and comprises a fixing seat, a supporting part and an adjusting mechanism, the supporting part is movably arranged on the fixing seat and provided with a groove matched with the peripheral shape of the roller, the adjusting mechanism is connected with the fixing seat, and the fixing seat is connected with the supporting part. And the adjusting mechanism is used for adjusting a gap between the supporting part and the roller. According to the scheme provided by the utility model, the height of the supporting part can be adjusted through the adjusting mechanism, so that a certain gap exists between the supporting part and the roller, rubber powder generated by scraping between the supporting part and the roller in the diaphragm winding process can be avoided, the roller can be supported through the supporting part when the diaphragm is wound, and the winding efficiency of the diaphragm is improved. And operators can conveniently stop the machine to replace the roller.

The present invention provides a glue anti-solidification device and method for an impregnation drying production line, and relates to the field of an impregnation drying production line. The glue anti-solidification device and method for an impregnation drying production line include an impregnation frame, two ends of the impregnation frame are fixed with double-head side brackets, a dust removal roller and a heating roller are installed on the right double-head side bracket, a double-head inner bracket is fixed inside the impregnation frame, a leveling roller is installed on the left double-head side bracket, and impregnated paper is arranged on the dust removal roller, the heating roller and the leveling roller. The glue anti-solidification device and method for an impregnation drying production line, by passing the impregnated paper through the dust removal roller, the heating roller and the leveling roller, during the process of the paper moving to the left, the dust removal roller can be used to remove dust from the surface of the paper, the heating roller can be used to preheat the paper, and then the preheated paper can be impregnated, and the surface of the impregnated paper can be flattened by the leveling roller, so that the glue can be prevented from solidifying during the impregnation process.

The invention belongs to the technical field of electric appliances, and particularly relates to an anti-condensation control panel device. The control panel comprises a control panel and a PCB (Printed Circuit Board), wherein a heating unit is arranged at a connector position on the PCB; the first temperature sensing unit is used for detecting the temperature of the control panel, and the temperature of the control panel is a first temperature; the control unit is used for acquiring the first temperature from the first temperature sensing unit; if the first temperature is lower than the preset temperature threshold value, voltage corresponding to the first temperature is output to the heating unit to control the heating unit to heat. The temperature of the control panel is detected through the first temperature sensing unit, and if the temperature of the control panel is lower than the preset temperature threshold value, the control unit determines the voltage corresponding to the first temperature according to the first temperature and outputs the voltage to the heating unit, so that different voltages are output to the heating unit at different first temperatures; and condensation is prevented in time.

A display device and a unit pixel. The display device includes: a TFT substrate having an electrode pad thereon; a first LED stack located on the TFT substrate; a second LED stack located on the first LED stack; a third LED stack located on the second LED stack; and a connector electrically connecting the first LED stack to the third LED stack to the electrode pad of the TFT substrate, wherein the first LED stack, the second LED stack, and the third LED stack can be driven independently, light generated from the first LED stack is emitted to the outside through the second LED stack and the third LED stack, and light generated from the second LED stack is emitted to the outside through the third LED stack.

This utility model discloses a chip testing device, relating to the field of electronic chip testing technology. The chip testing device includes a first pressing mechanism and a second pressing mechanism. The second pressing mechanism includes a cover assembly, a pipe connector disposed on the cover assembly, and multiple first test pieces. The cover assembly is detachably disposed on a base to open or close the slot of the positioning groove. The first test pieces are used for electrical connection with the chip. The cover assembly has a flow cavity, and multiple first test pieces are spaced apart within the flow cavity to form multiple gas supply channels. One end of the pipe connector is used to connect to a nitrogen gas source, and the other end is connected to the multiple gas supply channels. The technical solution provided by this utility model achieves the effect of eliminating electric arc generation through the interaction of nitrogen input and the first test pieces as testing structures, thereby improving the overall safety of the testing device.

The invention belongs to the technical field of dezincification rotary kilns, and particularly relates to a method for prolonging the ring forming period in a dezincification rotary kiln. The total content of total iron, SiO2 and CaO in the zinc-containing dust and mud mixture is controlled within 50% of the total mass of the zinc-containing dust and mud mixture, and the mass ratio of the total iron to the SiO2 to the CaO is (3-4.8): (1-1.5): 1; and controlling the standard deviation of total iron, the standard deviation of SiO2 and the standard deviation of CaO in the zinc-containing dust and mud mixture to be within a set threshold value. By adopting the method disclosed by the invention, a large amount of fayalite and hematite can be prevented from being generated when the zinc-containing dust and mud mixture is treated, so that ring formation in the rotary kiln is prevented, the ring formation period of the dezincification rotary kiln is further prolonged, the ring formation period of the dezincification rotary kiln for treating the zinc-containing dust and mud mixture is prolonged to 11-12 months from 3-6 months, and the yield of the dezincification rotary kiln is improved. The influence on production is reduced, the operation rate is improved, and meanwhile the production cost of the rotary kiln is reduced.

The utility model provides a tooth socket and a caries prevention device thereof, which relate to the technical field of tooth sockets, the tooth socket comprises a base material layer, a wrapping layer and a protective layer, the wrapping layer is arranged on the base material layer, and the protective layer is arranged on the wrapping layer. The caries prevention device comprises a fixing block, the fixing block is fixedly installed on the inner wall of the base material layer, a groove is formed in the fixing block, a storage box is installed in the groove, the back of the storage box is communicated with an air bag, and a baffle is installed in the air bag. The protective layer is arranged to protect the wrapping layer, so that the protective layer can prevent the tooth socket from being abraded due to long-term use, and the service life of the tooth socket can be guaranteed; by arranging the storage box, the effect of storing the mouthwash is achieved, and the use convenience of the tooth socket is improved; by arranging the air bag, the effect of discharging the mouthwash in the storage box is achieved, and the effect of preventing decayed teeth of a wearer caused by bacterium breeding is achieved.