14results about How to "Stable rate" patented technology

The invention belongs to the technical field of silver powder preparation, and particularly relates to a silver powder preparation method capable of being continuously synthesized, which comprises the following steps: (1) preparing a silver nitrate solution, a surface treatment solution and an ascorbic acid solution; (2) deionized water, a surface treatment solution and an ascorbic acid solution are used as base solutions, then the silver nitrate solution and the ascorbic acid solution are added according to a certain proportion for a reaction, and in the reaction process, the pH value of the reaction solution is adjusted by using a pH regulator to be kept at 4-6; (3) when the total volume of the liquid in the reaction kettle in the step (2) accounts for 80% of the volume of the reaction kettle, stopping feeding, stopping stirring, discharging from the bottom after sedimentation, discharging until the residual liquid in the reaction kettle accounts for 30-40% of the volume of the reaction kettle, and restarting stirring for feeding after discharging is completed; and (4) the materials discharged from the bottom are subjected to centrifugal separation, washing and drying, and then the silver powder is obtained. The method has the beneficial effects that the silver powder output speed is stable, so that the surface of the silver powder is smooth, and the dispersity is good.

The invention provides an automatic control system for acid mist absorption of industrial waste gas and a use method. The control system comprises a waste gas tower, a fan, a circulating pump set, a liquid alkali pump, a pressure sensor, a pH meter, a liquid level meter, an electric valve, a regulating valve, an operation screen and a central processing unit. According to the acid mist absorption automatic control system for the industrial waste gas, the pressure of the waste gas is obtained through the central processing unit, the working frequency of the fan is adjusted through a preset pressure value, and the rate of the waste gas entering the waste gas tower is stabilized. According to the pH value in the waste gas tower, the addition amount of the liquid caustic soda is adjusted by adjusting the adjusting valve through the operation screen arranged on an operation site or the central processing unit, so that the pH value in the waste gas tower fluctuates smaller, the adjusting range is more accurate, and the comprehensive efficiency of waste gas treatment is improved. Besides, according to the using method of the automatic control system, the control system can be automatically controlled and run according to a preset method, unified management of the system is achieved, and the stability in the standard gas emission process is ensured.

The invention discloses a structure for reducing the thickness of a material pile in liquid crystal glass production, belongs to the field of glass production, and not only ensures the sealing between a material bin and a kiln during feeding, but also reduces the thickness of the material pile and ensures the melting speed and the melting quality. The device mainly comprises a mounting platform, a stock bin is arranged on the mounting platform, a bin body of the stock bin comprises a stock bin inner shell and a stock bin outer shell, a cooling cavity is formed between the stock bin inner shell and the stock bin outer shell, and a cooling medium is provided for the cooling cavity by a cooling system; a batch inlet at the upper end of the stock bin is provided with a level gage, and the lower end of the stock bin is obliquely arranged; a feeding shaft is rotationally arranged on a bin body at the front end of a batch outlet of the stock bin, a plurality of feeding turning plates are annularly arranged on the feeding shaft at equal intervals, and the feeding shaft is driven by a transmission system; the batch outlet end of the stock bin is plugged into a feeding port of the glass kiln, and a sealing boss is arranged on a stock bin shell at the contact position of the stock bin and the feeding port of the glass kiln. The device is mainly used for reducing the material pile thickness in liquid crystal glass production.

The invention provides an evaporation method and application thereof, and relates to the technical field of vacuum evaporation, the evaporation method comprises the following steps: preheating an evaporation boat, a tungsten mesh and a solid aluminum source arranged on the tungsten mesh; pre-melting treatment is conducted, the solid aluminum source is melted, and molten aluminum covering part of the surface of the tungsten net is formed; pre-evaporation treatment is conducted, the molten aluminum is evaporated, and an initial infiltration area is formed; in the primary wire feeding stage, aluminum wires are fed at the first wire feeding speed, molten aluminum obtained after the aluminum wires are molten is spread in the initial infiltration area till the tungsten mesh is completely infiltrated by the molten aluminum, and at least part of the tungsten mesh is consumed; in the secondary wire feeding stage, aluminum wires are fed at the second wire feeding speed, and the tungsten net is completely consumed; and an evaporation stage: evaporating an aluminum metal layer on the base film. According to the evaporation method provided by the invention, the spreading uniformity and evaporation stability of the molten aluminum are improved, and the technical problems of narrow liquid level, frequent splashing and non-uniform coating thickness caused by non-uniform heat distribution in the traditional process are solved.

The invention discloses an atomization rate adjusting method and an atomization device.The atomization rate adjusting method comprises the steps that the atomization rate is preset; based on a preset atomization rate, determining a waveform amplitude parameter of the driving signal and a waveform output time proportion parameter of the driving signal; determining a liquid flow velocity parameter matched with the waveform amplitude parameter and the waveform output time proportion parameter of the driving signal; and based on the waveform amplitude parameter, the waveform output time proportion parameter and the liquid flow velocity parameter of the driving signal, driving liquid supply and driving an atomization sheet to work. The invention further provides an atomization device. The atomization piece is provided with holes. The driving circuit is electrically connected with the atomization sheet and is used for implementing the atomization rate adjusting method; a liquid cavity is formed between the mounting seat and the atomizing sheet; the barrel is connected to the mounting base, an atomization cavity is formed in the barrel, and the atomization piece is used for atomizing liquid in the liquid cavity.

The invention discloses an automatic stripping method for a product protective film, which is used for tearing off protective films on the lower surfaces of at least two workpieces sequentially arranged from left to right, and the upper surface of each workpiece is matched with a vacuum adsorption plate in an adsorption manner. A film tearing mechanism based on the automatic stripping method of the product protective film comprises a strip-shaped vertical plate extending left and right, a first material guide roller rotationally arranged on the front side of the left end of the strip-shaped vertical plate, a second material guide roller rotationally arranged on the front side of the right end of the strip-shaped vertical plate, a discharging assembly and a collecting assembly. The material collecting assembly comprises a mounting vertical plate, a material collecting rotating shaft rotationally mounted at the lower end of the mounting vertical plate and a material collecting motor mounted on the surface of the rear side of the mounting vertical plate. According to the film tearing device, interference on workpieces, especially relative positions of the workpieces in the film tearing process can be avoided, the adhesive tape roll for film tearing is convenient to assemble, disassemble and replace, and the situation that feeding is insufficient due to following rotation of the adhesive tape roll is avoided.

The present invention discloses an atomizer core assembly, an atomizer and an electronic cigarette. The atomizer core assembly includes: a fixing seat for mounting with an oil storage assembly; a mounting seat connected to the fixing seat, a receiving chamber formed in the fixing seat, a first oil inlet groove is provided on the side wall of the fixing seat, the first oil inlet groove extends in the axial direction of the fixing seat, and the first oil inlet groove and the oil inlet hole are both connected with the receiving chamber; a heating wire includes a heating body and a pin, the heating body is received in the receiving chamber, and the pin passes through the fixing seat; a first oil storage cotton is coated on the outside of the heating body and at least partially received in the receiving chamber; a second oil storage cotton is coated on the outside of the fixing seat. The atomizer core assembly of the present invention can avoid the occurrence of dry burning.

This invention provides an abrasive pad and a polishing method. The abrasive pad includes an abrasive layer, wherein, in a dynamic viscoelasticity measurement performed at a frequency of 1.6 Hz, the abrasive layer does not have a peak temperature of loss coefficient (tanδ) in the temperature range of 15°C to 120°C, and the rate of change of tanδ value in the temperature range of 15°C to 120°C, calculated according to the following formula, is less than 20%, tanδ value change rate = |(maximum value of tanδ in the temperature range of 15°C to 120°C) - (minimum value of tanδ in the temperature range of 15°C to 120°C)| / (maximum value of tanδ in the temperature range of 15°C to 120°C) × 100%.

The invention belongs to the technical field of beauty filler, and particularly relates to polysaccharide microspheres containing endogenous polycarboxylic acid as well as a preparation method and application of the polysaccharide microspheres. The preparation method comprises the following steps: dissolving polysaccharide and endogenous polycarboxylic acid in water to obtain a water phase; dissolving an emulsifier in liquid paraffin to obtain an oil phase; adding the water phase into the oil phase, stirring to form an emulsion, firstly heating to 80-95 DEG C for the first time, preserving heat for 12-72 hours, then heating to 100-120 DEG C for the second time, preserving heat for 6-24 hours, and finally cooling, drying and sieving to obtain the water-based paint. The polysaccharide microsphere is a biomedical material capable of degrading and slowly releasing endogenous carboxylic acid, and the endogenous carboxylic acid can promote collagen regeneration and has no obvious inflammatory reaction; in the degradation process, the slow release rate of endogenous carboxylic acid is stable, the lasting time is long, collagen regeneration can be effectively stimulated for a long time after implantation, and inflammation is reduced; and complete degradation can be realized within 12 months, so that long-term adverse reaction can be avoided.

The present invention discloses a preparation method for iron phosphate powder by microporous filtration and concentration and a preparation device thereof. The preparation method includes: putting raw materials into a reactor to react for nucleation, a mother liquor generated after raw materials reaction entering the filter concentrator, and controlling and starting a stirring shaft for driving an upper stirring blade and a lower stirring blade to rotate for grinding and scaling; when a mother solution level exceeds an upper liquid inlet end of lower microporous filtration tube groups, controlling and starting a filtrate valve of a filtrate tube of the lower microporous filtration tube groups, and when the mother solution level exceeds the upper liquid inlet end of upper microporous filtration tube groups, controlling and starting a filtrate valve of a filtrate tube of the upper microporous filtration tube groups. The present invention has small instantaneous flow fluctuation, has the characteristic of good accuracy of a reaction system, and integrates a filtration system and an intermediate tank to effectively reduce the volume and shorten the reaction process.

The present invention discloses a knitted grey cloth shaping process and a shaping device thereof, belonging to the technical field of pre-shrinking shaping installation, comprising a frame and an exhaust part, a plurality of groups of transmission rollers are arranged on the frame, an ironing roller and two tension rollers are arranged on the frame, the ironing roller is connected with a heating element for heating the surface of the ironing roller, a traction assembly is arranged on the frame, a displacement assembly is arranged on the frame, and the displacement assembly is driven by a tension sensor, and a rotating assembly for driving the ironing roller close to the surface of the material to reciprocate around the axis along the transmission direction of the material is arranged on the frame. A knitted grey cloth shaping process and a shaping device thereof of the present invention adjusts the tension of the material in real time by arranging a traction assembly driven by a tension sensor, so that the shrinkage effect of the surface of the material to be dried can be controlled in the active tensioning of the traction assembly, and compared with the prior art, it can effectively ensure the stability of the overall rate of the pre-shrinking shaping machine, so that the material can pass through the steaming zone at a uniform rate.

The utility model relates to a portable nitrogen making machine which comprises a control panel, a movable base, a case and a nitrogen making device, the nitrogen making device comprises an activated carbon canister, an adsorption tank group, a buffer tank, an adsorption tank gas inlet pipeline, an adsorption tank gas inlet control valve, an adsorption tank gas outlet pipeline, an adsorption tank gas outlet control valve, an emptying pipeline and an emptying control valve; the case comprises an upper side plate, a peripheral side plate and a fixing ring, a case door capable of being opened or closed is arranged on the peripheral side plate, and the fixing ring comprises a first arc-shaped clamping body and a second arc-shaped clamping body which are detachably matched together and arranged on the outer side of the tank corresponding to the fixing ring in a sleeving mode. The balancing pipelines are arranged among the plurality of adsorption tanks, so that the adsorption tanks can more sufficiently adsorb gas, the speed of the gas passing through the adsorption tanks is more uniform, and the speed of nitrogen entering the buffer tank is more stable; due to the design of the detachable fixing ring and the box door, tank bodies such as the adsorption tank and the like can be conveniently maintained, and the manufacturing cost of the small nitrogen making machine is greatly reduced due to the simple and modularized structural design.

The invention belongs to the technical field of etching, and particularly discloses a silver film etching solution which comprises the following raw materials in percentage by mass: 30-40% of phosphoric acid, 5-10% of nitric acid, 5-10% of acetic acid, 0.01-0.05% of a porphyrin compound, 0.01-0.05% of a guanidine derivative, 5-10% of a dispersing agent, 1-5% of a stabilizer and the balance of water. The silver film etching solution provided by the invention has a stable etching rate, and can well solve the problems of silver residue, silver after-tack and the like at the same time.

The invention discloses a connecting fastener fatigue test device, and relates to the technical field of fastener fatigue test, the connecting fastener fatigue test device comprises a loading frame, a rack slidably mounted along the width direction of the top end of the loading frame, and a long-axis linear driver arranged on one side of the top end of the loading frame and used for driving the rack to slide; a lifting device is installed at the bottom end of the rack, a wedge groove type single-cylinder multi-piece co-clamping assembly used for clamping at least two U-shaped bolts is installed at the driving end of the lifting device, at least two vertical plates are installed on the outer wall of one side of the carrying frame, and a double-rocker-arm synchronous bending assembly is installed on the outer wall of the side, close to the rack, of each vertical plate. Through stable clamping of multi-piece co-clamping, accurate height and distance adjustment, self-locking clamping and synchronous loading of double rocker arms, the problem of consistency of positioning, clamping and loading in a U-shaped bolt bending fatigue test is effectively solved, so that the accuracy, repeatability and operation efficiency of the U-shaped bolt bending fatigue test are improved.