13results about How to "Solve cross-contamination" patented technology

The invention relates to the field of new energy storage materials, and discloses a multifunctional composite perfluorosulfonic acid ion exchange membrane for an all-vanadium redox flow battery, and the composite membrane comprises the following components: perfluorosulfonic acid resin which accounts for 60-90wt% of the total mass of the membrane and is used as a matrix material; the functionalized multi-walled carbon nanotube accounts for 5-15 wt.% of the total mass of the membrane, and carboxyl and hydroxyl are introduced through surface treatment; phosphotungstic acid accounts for 5-20wt.% of the total mass of the membrane, and is anchored on the surface of the functionalized multi-walled carbon nanotube through an electrostatic spinning process; n, N-dimethylformamide and isopropanol are used as solvents, and the solvents are mixed with a perfluorinated sulfonic acid resin solution according to the volume ratio of 1: 1. The proton conductivity, the vanadium ion barrier property and the tensile strength of the composite membrane are obviously superior to those of a traditional Nafion membrane. According to the technical scheme, an efficient and economical solution is provided for improving the overall performance of the all-vanadium redox flow battery, and the method has good application prospects and market value.

The utility model provides a refrigerator door body egg rack and a refrigerator. The refrigerator door body egg rack comprises a door body outer door, a door body inner door, egg rack partition plates and egg rack egg supports. The door body outer door is arranged on the side, away from a refrigerator refrigerating box body, of the refrigerator door body. The door body inner door is arranged on the side, close to the refrigerator refrigerating box body, of the refrigerator door body. The door body outer door is hinged to the door body inner door; the egg rack partition plate and the egg rack egg support are arranged inside the door body inner door, and the egg rack egg support is arranged on the egg rack partition plate. The space of the refrigerator door body is utilized to improve the egg storage capacity, eggs can be conveniently and rapidly taken and placed by opening and closing the outer door of the door body, the eggs and other food of the refrigerator are stored separately, bacteria on the surfaces of the eggs are prevented from polluting the other food of the refrigerator, and the service life is prolonged. Meanwhile, the eggs can be prevented from being polluted by smell volatilized by other foods in the refrigerator, so that the problems that the egg rack is small in capacity and cross contamination is generated with other foods in the refrigerator are solved.

The utility model discloses a kind of splash-proof, dust-proof formula mixing tank, it is related to mixing equipment technical field.The mixing tank includes support base and mixing tank main body, support base is equipped with sliding frame, liftable sliding seat is connected in sliding frame by hydraulic push rod and guide rod.Sliding seat is installed with driving motor, motor drives driven wheel rotation by belt drive, driven wheel below is connected transmission seat and transmission box.Gear transmission mechanism is equipped in transmission box by driving gear and two driven gears, to drive two stirring rods rotation simultaneously.Transmission box outside is installed with the scraping blade that is adhered with tank wall by connecting frame, transmission seat is equipped with dust cover with overall lifting.The utility model effectively prevents splash and dust by liftable sealing structure, simultaneously realizes tank wall self-cleaning using scraping blade, solves the technical problem of unreliable sealing, inconvenient cleaning and tank wall residual material in prior art.

The application belongs to the technical field of spinning yarn processing, and particularly relates to a coating machine for spinning yarn and a working method thereof. In view of the problems of complicated cleaning, more residues in dead angle of wire slot and different step of tension adjustment during material replacement of the existing coating machine, the following scheme is proposed, which comprises a tension roller, one end of the tension roller is provided with a coating machine, the surface of the tension roller is rotationally connected to the surface of the coating machine through a bearing, a coating roller is arranged on the upper side of the rear end of the tension roller, bearing seats are arranged on the two sides of the coating roller, the two ends of the coating roller are rotationally connected to the inner walls of the bearing seats, a coating box is arranged on the lower side of the coating roller, the two ends of the coating box are respectively fixedly connected to the inner side surfaces of the two bearing seats, and the bearing seats are arranged on the upper side of the coating machine. The coating machine for spinning yarn and the working method thereof disclosed by the application realize quick disassembly and assembly and automatic cleaning, solve the problem of incomplete cleaning in the traditional technology, improve coating uniformity and reduce material loss.

The application relates to the technical field of waste liquid treatment, and discloses a recovery device and method for recycling machining cutting liquid, which comprises a horizontal screw centrifuge composed of a machine frame and a machine cover, a multistage filter box is arranged at the rear side of the horizontal screw centrifuge, an ultrafiltration membrane assembly is arranged at the left side of the multistage filter box, and an ion exchange unit is arranged at the left side of the ultrafiltration membrane assembly. The heat treatment recovery device and method for recycling machining cutting liquid can effectively solve the problems in the prior art, i.e. the physical filtration of the existing cutting liquid recovery device can only intercept large-particle-size particles, the solid-liquid separation effect is poor, the cutting liquid is continuously enriched, the viscosity is increased, the performance is decreased, silicon wafer scratches and edge collapse defects are caused, the continuous operation time of the recovery equipment is short, the recovery equipment needs to be frequently stopped for manual cleaning and maintenance, core separation components are difficult to disassemble and maintain, the maintenance cost is high, the large-scale continuous production demand cannot be met, and different batches of cutting liquid are prone to cross contamination, thereby reducing the quality and stability of the recovered liquid.

The invention discloses a self-suction type liquid extractor and a method. The extractor comprises a shell, an internal pressure cavity, a pressure generating unit, a liquid suction unit and a liquid spraying unit. The pressure generating unit linearly moves in the pressure cavity to alternately generate positive pressure and negative pressure; the liquid suction unit is provided with a first one-way flow guide structure and a filtering structure, and is opened and sucks filtered liquid under negative pressure; the liquid spraying unit is provided with a second one-way flow guide structure and an atomization structure, and is started under positive pressure to atomize and spray out liquid; and a locking mechanism is arranged on the pressure generation unit and is used for locking the position after descending and can automatically ascend under the action of reset force after unlocking. The closed type pressure cavity is adopted, pollution and liquid backflow are avoided, liquid suction, liquid storage and liquid spraying are continuously carried out with one hand through the operation mode of pressing locking and unlocking automatic reset, operation is easy and convenient, efficiency is high, and the liquid transfer device is suitable for scenes such as food tasting and experimental analysis needing sterile and accurate liquid transfer.

A kind of high-speed kneader for producing PP automobile modified material, it is related to the technical field of kneader, solve the problem that the structure of paddle is single in prior art, it is difficult to consider high-strength shearing and gentle mixing.The mixing cavity is connected with the discharge cavity at the bottom end, and the discharge cavity is provided with a discharge channel at the lower end;The top of the mixing cavity is connected with an electrical control box, and the top of the mixing cavity is also provided with a driving motor, a rotating shaft is coaxially connected in the mixing cavity, a combination stirring blade is fixed on the periphery of the rotating shaft, the combination stirring blade includes shear blade, conveying blade and cleaning blade, the shear blade, conveying blade and cleaning blade are arranged in order from top to bottom.The beneficial effect is: multiple functions can be realized by combination stirring blade, high-strength local shearing is provided, mixing is uniform, and mixing efficiency is high.

The utility model provides a kind of activated carbon filtering device for water purification, including base, discharge area is provided on the base, the first support and second support top are integrally formed with guide rail, installation frame is fixedly installed on the guide rail top, funnel is fixedly installed on the installation frame, water receiving tank is provided on the base top, activated carbon tray is provided above the water receiving tank, installation plate is fixedly installed on the activated carbon tray, the number of sector gate that is two is hinged on the installation plate by hinge, mesh is opened in the sector gate, flow guide cover is fixedly connected in the sector gate bottom, the flow guide cover corresponds with mesh, first lug is fixedly connected in the sector gate bottom, slot is opened in the first lug, and convex plate is fixedly connected on the activated carbon tray outer wall;The present activated carbon filtering device is convenient for replacing activated carbon, and the replacement process not only saves time and effort, but also can reduce the phenomenon that old carbon contacts hand or environment.

The invention provides a tractor hydraulic system detection device, which aims to solve the problem of cross contamination caused by the existing one-way passage design, and comprises a controller, a coarse and fine adjusting throttle valve, an oil pressure sensor, a multi-passage valve block, an oil pressure temperature sensor, a flow meter, an isolation cylinder, a circulating pump, a hydraulic oil buffer tank and a stop valve, the oil inlet male head and the oil outlet male head are connected with a tractor hydraulic system, the oil pressure sensors are installed on the oil inlet male head and the oil outlet male head respectively, real-time monitoring of pressure changes is ensured, the isolation barrel is divided into the oil inlet isolation barrel and the oil outlet isolation barrel, the piston is arranged in the isolation barrel, the barrel body is divided into the detection section and the connection section, cross contamination of hydraulic oil of different devices is effectively prevented, and the reliability of the device is improved. And a circulating pump is arranged between the detection section and the connection section to ensure that hydraulic oil in the connection section can be completely discharged or replaced after each detection. Through multi-protection and redundancy design, the stability and safety of the system are improved, and the system has high practical value and popularization prospect.

This utility model relates to the field of dark tea fermentation technology, specifically a dark tea fermentation device that facilitates material turning. It includes a fermentation box with supports fixedly connected to its bottom and middle inner side, and a detachable placement box mounted on the supports; a sealing cover, which is raised and lowered inside the fermentation box via a lifting mechanism and positioned above the placement box; and a stirring mechanism located below the sealing cover. This utility model, through the combined use of the sealing cover and the fermentation box, achieves a closed operation during the stirring process, effectively preventing the splashing of tea leaves during stirring and solving the problems of cross-contamination and cleaning difficulties caused by material splashing in open systems.

This invention discloses an automatically target-changing pulsed laser deposition apparatus and method. The apparatus includes a process chamber, a transfer valve, and a buffer chamber. The process chamber is connected to the buffer chamber via the transfer valve and is configured as an internal vacuum chamber. The buffer chamber has a door at its upper part and operates as a vacuum chamber. A sample stage is located on the upper inner side of the process chamber. Two neck tubes are located on the two sides of the process chamber for guiding an external laser source and mounting a laser detection device, respectively. The process chamber also includes a rotatable target stage for loading and unloading targets from the buffer chamber. The buffer chamber includes a rotating target stage mechanism and a vision camera for placing the target material and recording the bottom features of the target material, respectively. This invention provides an automatically target-changing pulsed laser deposition apparatus and method with a compact structure, precise positioning, and automatic target changing capabilities, enabling fully automated deposition of ultrapure thin films.

This invention relates to the field of auxiliary tools for baijiu (Chinese liquor) brewing, specifically disclosing a liquor collection device, comprising: a frame; a discharge assembly mounted on the frame, including a liquor outlet pipe, a driver for driving the assembly to rotate, and discharge ports located at both ends of its rotation axis; a mass flow meter fixedly mounted on the discharge assembly, with its fluid channel connected to the liquor outlet pipe and the liquor inlet pipe respectively at both ends, the mass flow meter being configured to rotate with the discharge assembly to achieve discharge; and a grading collection tray mounted on the frame and located below the liquor outlet pipe, comprising multiple collection boxes arranged in a ring and a rotating collection device located at the center of the ring; the rotating collection device is used to receive liquor from the liquor outlet pipe, and can rotate under driving force to guide the liquor to different collection boxes. This improves operational efficiency and measurement accuracy, thereby ensuring the production quality of baijiu.