51results about How to "Avoid prolonged contact" patented technology

The invention provides a wafer cleaning method, which comprises the following steps: feeding a first solvent into a cleaning container to clean the wafer, and then feeding a second solvent into the cleaning container to clean the first solvent left on the surface of the wafer. A cleaning device using the cleaning method comprises the cleaning container which is provided with a first liquid inlet pipeline and a second liquid inlet pipeline. The first solvent is fed into the cleaning container from the first liquid inlet pipeline, and the second solvent is fed into the cleaning container from the second liquid inlet pipeline. The cleaning device uses the second solvent to clean the first solvent on the surface of the wafer to avoid the long time contact of the first solvent which has corrosion action to the wafer and the wafer, thereby avoiding generation of wafer rejection caused by the corrosion of the wafer by the first solvent, and improving the economy of wafer cleaning technology.

The invention relates to a sagger used for high-temperature firing and a preparation method of the sagger. The sagger used for high-temperature firing is formed by performing mixing forming by using aluminum oxide powder, kaolin powder, clay powder, white corundum, quartz and mullite as raw materials and performing high-temperature firing. The sagger used for high-temperature firing provided by the invention has a good thermal shock effect, low costs and long service life, and can maintain the crack resistance, uniformity and quality stability of a product during mass production, and is suitable for use in environments with larger temperature differences; the sagger used for high-temperature firing provided by the invention is produced during high-temperature firing, and compared with a sagger formed by synthesizing quartz and mullite in advance and performing mixing forming on the market, the sagger provided by the invention has a more uniform finished-product phase, better color andthermal shock stability, and a small phase thermal expansion coefficient, thereby having extremely high thermal shock stability; and the quartz is added, so that the thermal shock performance can be improved.

An apparatus for cutting a workpiece as biospecimen into a section while maintaining living state of cells includes a board on which the workpiece is placed, a device for freezing and fixing the workpiece on the board, and a blade for cutting the frozen workpiece fixed on the board into a section by means of rotary movement in a predetermined rotational direction. A profile of a cutting edge of the blade is a curve showing monotonic increase in distances of a rotational axis to points starting at a nearest point that is the shortest from the axis and ending at a farthest point that is the longest from the axis. The farthest point is behind the nearest point in the rotational direction and the curve is convex opposite to the rotational axis with respect to a straight line connecting the nearest point and the farthest point.

The invention relates to a liquid recovery device which comprises a collection box, a recovery pump, a liquid storage bottle and a pipeline sequentially communicated with the collection box, the recovery pump and the liquid storage bottle, wherein in a recovery process, the recovery pump is periodically opened and closed. When the liquid recovery device is used for recovering liquid, the recovery rate and the quality of recovery liquid can be guaranteed. The invention also provides a liquid recovery method by using the recovery device.

The invention discloses a linear type efficient electrostatic spinning spray nozzle, which is suitable for the electrostatic spinning of a polymer fusant. The linear type efficient electrostatic spinning spray nozzle comprises a main runner, a crescent runner, a linear nozzle, a diversion trench and a heating and temperature control devices, wherein the polymer fusant enters the crescent runner via the main runner; the fusant can flow to the linear nozzle on a cylindrical wall surface by a crescent flow diversion surface; the polymer flowing out of two sides of the cylindrical wall flows to the bottom end of a horizontal charging barrel via an outer wall surface; secondary shunting of the fusant can be realized by the diversion trench; and after an electrostatic field is added, multiple strands of evenly-injected flows are respectively formed on two sides of the bottom end. According to the linear type efficient electrostatic spinning spray nozzle disclosed by the invention, the problem that materials are left in the nozzle can be solved, and the linear type efficient electrostatic spinning spray nozzle has higher spinning efficiency and is suitable for industrial production.

The invention discloses a colorimetric method for rapidly and efficiently testing the content of Tween-80. The method comprises the following steps: in an aqueous medium, performing a rapid developing reaction on poly-ethyoxyl and thiocyanic acid cobalt amine salts of Tween-80 under a boiling water bath heating condition so as to quantitatively generate a blue developing product which is not dissolved in water; and cooling to the room temperature, quantitatively adding an organic solvent, extracting the developing product, and testing the content of Tween-80 by using the colorimetric method. The colorimetric method disclosed by the invention is applicable to rapid quantitative test on the Tween-80 of a medicinal auxiliary material in various medicinal preparations, and a convenient and reliable detection method is provided for quantitative control on Tween-80 in related products.

The invention discloses an aviation logistics packaging box for pet transport. The aviation logistics packaging box comprises a shipping box. The shipping box is internally provided with a moving cavity, and a transmission cavity is formed in inner walls of the rear side and the lower end of the moving cavity. A transmission shaft located at the lower end of the moving cavity is rotatably connected into the transmission cavity. A track wheel with an annular wave groove on the surface is arranged on the transmission shaft. The aviation logistics packaging box has the advantages that a slipperybottom plate is slide leftwards and rightwards, the bottom plate extending out of the moving cavity is sterilized and washed, and accordingly, long-term contact between pets and excrement is avoided;synchronous operation of the replaced bottom plate and a fresh air system is achieved through belt transmission, and accordingly, the health of the pets is further ensured; a feeding device is startedthrough a switch structure capable of being clamped to a conveying belt, food is added and taken quantitatively through an accommodating groove in a rotating tooted barrel, the pets are prevented from being hungry or stuffed, and accordingly, the safety of the pets in long-term flight transport is effectively ensured.

The invention discloses a traditional Chinese medicine storage tank. The traditional Chinese medicine storage tank comprises a tank body, a separation plate is fixedly arranged inside the tank body, astorage cavity is formed in the top of the separation plate, an exhaust branch pipe is arranged inside the storage cavity, a merging pipe is arranged at the bottom end of the exhaust branch pipe, anexhaust main pipe is connected to the merging pipe, a vacuum pump is arranged on the exhaust main pipe, a top cover is arranged at the top of the tank body, a sealing ring is nested at the bottom of the top cover, and a pressing switch is arranged on the side surface of the tank body. According to the traditional Chinese medicine storage tank, the vacuum pump is arranged so that the vacuum pump can be conveniently used for pumping out air inside the storage cavity through the exhaust main pipe, the merging pipe and the exhaust branch pipe, through the cooperation of the sealing effect of the sealing ring, the interior of the storage cavity is in a state close to the vacuum, so that the traditional Chinese medicine is prevented from being in contact with the water vapor for a long time, andthen the traditional Chinese medicine is prevented from mildewing and deteriorating.

The invention belongs to the food field, and specifically provides a milk powder capable of improving intelligence and immunity of infants and a dry-mixing production technology thereof. The provided milk powder comprises a DBL intelligent protection system; wherein the DBL represents three main raw materials: docosahexaenoic acid, bifidobacterium, and lactoferrin. At the same time, the invention further provides a dry-mixing production technology of the milk powder. The milk powder has the advantages that the activities of each bioactive component are preserved maximally, the nutrients are evenly dispersed in the milk powder, and the intelligence and immunity of infants can be prominently improved.

The invention relates to an auxiliary skid bed for producing and processing down feathers. The auxiliary skid bed comprises a polygonal support frame, a bearing plate in the middle below the polygonalsupport frame, and stands uniformly distributed on the polygonal support frame, wherein track plates are symmetrically distributed on the stands; a clamping device in sliding fit with the track plates is arranged between the track plates; and a driving device for driving the clamping device to tightly hoop a bag opening on a discharging pipeline opening under the guidance of the track plates andpreliminarily closing the bag opening after charging is arranged on each of the stands. According to the auxiliary skid bed, the track plates and the driving devices are arranged to enable a pluralityof pneumatic clamps on the polygonal support frame to synchronously and tightly hoop the bag opening on the discharging pipeline opening and preliminarily close the bag opening after charging, so that the situation that the packaging bag opening is manually hooped to the discharging pipeline opening is replaced, the labor intensity of a worker is lowered, long-time contact between the worker anddown features is avoided, and the life safety of the worker is ensured.

The invention discloses a municipal administration road garbage recycling device. The municipal administration road garbage recycling device comprises a first shell. The upper surface of the first shell is fixedly connected with the lower surface of a first cover plate. A first through hole is formed in the upper surface of the first cover plate, and the left side face of the inner wall of the first through hole is fixedly connected with the left side face of a first bearing. A first rotation shaft is in cup joint to the inner wall of the first bearing. One ends of the front face and the backface of the first rotation shaft are fixedly connected with the front side face and the rear side face of the inner wall of a U-shaped plate correspondingly. The right side face of the U-shaped plateis fixedly connected with the left side face of a movable plate. According to the municipal administration road garbage recycling device, under the combined action of a driving wheel, a driven wheel,a belt, a motor, a second rotation shaft and a second bearing, a cleaning worker collects recoverable garbage, the process that the cleaning worker puts hands into the first shell to overturn and takeout the recoverable garbage is avoided, the recoverable garbage is recycled, and energy is saved to a certain degree.

The invention discloses an additive sample bottle applied to the field of chemical engineering. The bottle comprises an outer bottle and an inner bottle, wherein an inner cover and an outer cover arearranged on a bottle opening, the outer cover is fixed through lugs on the inner cover, the inner cover is in threaded connection with the sealing bottle opening, and wing edges of the outer bottle are fixed. Pressure springs are arranged in inner step through holes of the inner cover, pressing blocks are arranged in outer steps through holes of the outer cover, and the pressure springs compact the pressing blocks and seal the outer step through holes. The outer bottle is formed by buckling two half-bottle lap joints with observation holes, the observation holes are shielded by a shading piece, and the shading piece can move in a gap between the inner bottle and the outer bottle. The color and smell of additives in the sample bottle are convenient and fast to detect, micro-positive pressure nitrogen in the bottle avoids the long-time contact of the additives and air, the light shielding effect of the outer bottle is good, and the problem of color change of the additives is solved.

The invention provides a special device for gear cleaning, and belongs to the technical field of gear machining. The special device for gear cleaning is good in cleaning effect and convenient to operate and can realize large-batch cleaning. A plurality of ultrasonic energy transducers are mounted on the bottom face of a cleaning tank and electrically connected with an ultrasonic generator, the cleaning tank is fixedly mounted on a base and is a round tank, a cleaning frame is arranged in the cleaning tank and erected on the side wall of the cleaning tank, four rotating shafts are arranged at the upper end in the cleaning tank, and other four rotating shafts are arranged at the lower end in the cleaning tank; and one end of each rotating shaft is rotatably connected with the cleaning frame,the four rotating shafts located at the upper end are driven by one transmission mechanism, the four rotating shafts located at the lower end are driven by one transmission mechanism, a motor drivesthe two transmission mechanisms through connecting shafts, and the motor is fixedly mounted on the cleaning frame. The special device for gear cleaning can clean gears in large batches, operation is easy, and the convenient and practical effects are achieved.

The invention relates to the technical field of production of injection molding accessories and discloses a fully-automatic rope head welding device. The fully-automatic rope head welding device comprises a bed body, wherein a micro-control center is arranged in the bed body; a charging shaping mechanism, a delivery mechanism, a welding forming mechanism and an accommodating part are mounted on the bed body sequentially from left to right; a knotting brake part is arranged in the charging shaping mechanism; a starving brake part is arranged between the charging shaping mechanism and the delivery mechanism; the welding forming mechanism consists of a clamping and coiling part, a pre-bending part, a welding cutting part and a pressing part; the clamping and coiling part is mounted on one side of the accommodating part; the pre-bending part is arranged above the material feeding direction; the welding cutting part is arranged on one side of the pre-bending part; the pressing part is arranged between the clamping and coiling part and the accommodating part; the delivery mechanism, the welding forming mechanism and the micro-control center are electrically connected. The fully-automatic rope head welding device realizes fixed-speed, fixed-length and fixed-yield production and has high production efficiency; the products have high standard precision, high safety performance and high yield, energy is saved, the efficiency is high, manpower and material resources are saved, microcomputer fully-automatic control is realized, and continuous production of the products is realized.

The invention discloses a liquid injection head of a polymer battery electrolyte. The liquid injection head comprises an upper cover and a main body, wherein the upper cover is made of polyethylene or polypropylene; a first hollow cavity is arranged in the upper cover; an inner thread is arranged in the surface of the first hollow cavity; a gas pressure pipe and a liquid injection pipe communicating with the first hollow cavity separately are fixedly arranged on the upper surface of the upper cover; an outer thread matched with the inner thread is arranged in the side surface of the upper part of the main body and a second hollow cavity is arranged in the main body; an electrolyte filter net is arranged in the second hollow cavity; filter paper covers the surface of the electrolyte filter net; a liquid outlet pipe communicating with the second hollow cavity is arranged on the lower surface of the main body; a guard cover is arranged on the surface of the tail end of the liquid outlet pipe; and a plurality of discharge through holes are arranged in the guard cover. The liquid injection head is reasonable in structure and convenient to use; the condition that the electrolyte is not affected by external dust in a liquid injection process is ensured; the electrolyte filter net and the filter paper can filter out tiny dust existing in the electrolyte in the liquid injection process; and the use requirements of liquid injection of the electrolyte are met.

The invention discloses a return liquid circulating system which comprises a liquid supply tank and a liquid return tank, wherein a liquid return pipe communicating with a liquid outlet of a liquid collecting tank is arranged on the liquid return tank, at least one layer of filter screen for filtering particle impurities is arranged in the liquid return tank, and the filter screen is located belowan outlet of the liquid return pipe; a liquid inlet pipe connected with a spray gun is arranged on the liquid supply tank, and a liquid inlet pump is arranged on the liquid inlet pipe; and the liquidreturn pipe is connected with the liquid supply tank through a liquid return communicating pipe. The invention further discloses a panel reagent spraying device. By arranging the liquid return tank connected with the liquid collecting tank, reagents collected in the liquid collecting tank flow back into the liquid return tank through the liquid return pipe, particle impurities are filtered out through the filter screen arranged in the liquid return tank, then the reagents enter the liquid supply tank through the liquid return communicating pipe, so that cyclic utilization is achieved; The panel reagent spraying device can recover and recycle the reagents.

The invention discloses a laryngeal mask airway with a pressure indication function, which comprises a main ventilation tube, one end of the main ventilation tube is fixedly sleeved with a mask bag, one side of the mask bag is provided with an inflation tube, one end of the inflation tube is fixedly connected with a first female joint, and one end of the first female joint is provided with an extension tube assembly. Meanwhile, the extension tube assembly is fixedly installed through threads, time and labor are saved, the hand of a doctor is prevented from making contact with the mask bag and the main ventilation tube for a long time by installing the handheld mechanism and taking the laryngeal mask through the handheld mechanism, secondary pollution can be reduced, and meanwhile medical alcohol is used for soaking before use, so that the operation is convenient and fast. And through indication of the pressure marks on the pressure indicator, the pressure in the mask bag can be conveniently and more visually checked, external equipment is not needed, the practicability of the equipment is improved, and the use cost of the equipment is reduced.

The invention discloses an optical lens mounting device of a laser collimator, and relates to the technical field of optical system adjustment. The device comprises a workbench, a mounting disc and a glue dispensing box, the glue dispensing box corresponds to the mounting disc in position, an exhaust fan is arranged in the glue dispensing box and corresponds to a glue dispensing head in position, and a speed regulator is arranged in the glue dispensing box and controls the wind power of the exhaust fan. By arranging the mounting disc and utilizing a mounting groove, a to-be-dispensed workpiece can be fixedly mounted conveniently, meanwhile, the mounting height of the workpiece is adjusted by utilizing a fastening bolt cap and a supporting spring, so that the workpiece adapts to the height position of a dispensing head, and long-time contact between UV glue and air is further avoided; and on the other hand, by arranging the exhaust fan and an exhaust pipe corresponding to the position of the dispensing head, starting of the exhaust fan is controlled through the glue pressing and dispensing action, meanwhile, the wind power is gradually reduced in the downward pressing process, air between the dispensing head and the workpiece can be exhausted, and dispensing deviation caused by too large wind power can be avoided.

The invention discloses a lithium transition metal oxide positive electrode material surface modification method, which comprises: adding a first additive, a second additive and a lithium transition metal oxide into water to obtain a first slurry,the first additive being lithium-containing phosphate and the second additive being an acid solution of Y<3+> or Al<3+> salt; dropwise adding a third additive into the first slurry to obtain a second slurry, the third additive being an acidic solution of TiO<2+> or ZrO<2+> salt;dropwise adding a fourth additive to the second slurry to obtain a third slurry, the fourth additive being an alkaline solution of AlO<2-> salt; and centrifuging and drying the third slurry to obtain an intermediate product, mixing the intermediate product with a large-particle positive electrode material, and performing sintering to obtain the surface-modified lithium transition metal oxide material. The coating layer is uniform in component and controllable in thickness, the phenomenon that the surface of a solid-phase structure is not uniform can be improved, a spinel structure substance is generated on the surface of the material in the circulation process, the high-pressure resistance of the material is improved, and the circulation performance of the lithium transition metal oxide positive electrode material is improved.

The invention discloses a cigarette cartridge with an oil leakage prevention structure and an electronic cigarette. The cigarette cartridge with the oil leakage prevention structure comprises a tobacco bin, a base assembly, an atomization assembly and a clamp. The tobacco bin is used for storing tobacco tar and comprises an open end, the base assembly comprises a base arranged at the open end anda heating core, the heating core is arranged in the base in a sliding mode, the atomization assembly is fixed to the heating core, a clamping groove is formed in the heating core, and the clamp is detachably clamped in the clamping groove so as to limit movement of the heating core relative to the base. According to the cigarette cartridge with the tar leakage prevention structure, the movement ofthe atomization assembly relative to the base is limited through the clamp, it is guaranteed that the atomization assembly does not make contact with the tobacco tar, then tar leakage can be avoided,the situation that a chemical reaction layer is generated due to the fact that the atomization assembly makes contact with the tobacco tar for a long time can be further prevented, and the cigarettecartridge can obtain a good atomization effect; according to the electronic cigarette, the atomization assembly of the cigarette cartridge with the tar leakage prevention structure does not make contact with the tobacco tar, and it is guaranteed that the tar leakage situation of the electronic cigarette is avoided.