10results about How to "Convenient time control" patented technology

This invention discloses an ionization power supply assembly and a power control method. The ionization power supply assembly includes an insulating base, a voltage multiplier rectifier, a first discharge needle assembly, a second discharge needle assembly, and a discharge orifice plate. The first and second discharge needle assemblies extend through the voltage multiplier rectifier and into the insulating base, with one side of the insulating base contacting one side of the voltage multiplier rectifier. A discharge orifice plate is provided at one end of the insulating base. The first discharge needle is electrically connected to the high-voltage output terminal of the positive polarity voltage multiplier plate, and the second discharge needle is electrically connected to the high-voltage output terminal of the negative polarity voltage multiplier plate. The ionization assembly is fixed to one end of a drift tube, sealing the drift tube. The discharge needles are connected to the internal gas path of the drift tube and are sealed to the insulating base and the voltage multiplier rectifier. This invention enables the ionization of air to generate an ion source with controllable polarity and duration. The ions generated by polarity conversion maintain the same polarity as the drift electric field, and the ionization intensity and ionization time are controllable.

The invention discloses a preparation method and application of a degradable hydrogel solar evaporator with a surface microstructure, and relates to the technical field of interface evaporation materials. The invention aims to solve the problems that an existing solar evaporator is low in evaporation efficiency, difficult to recycle after alkaline wastewater treatment, easy to form solid wastes and lack of an in-situ degradation environment-friendly scheme. Functional groups capable of being subjected to hydrolysis reaction under alkaline conditions are introduced into a hydrogel network, and the evaporator with a specific geometric structure is constructed by utilizing a photocuring 3D printing technology, so that the evaporator keeps structural stability and high evaporation performance in a use stage, and can be degraded according to preset conditions in an alkaline environment; therefore, the evaporator can disappear controllably after being used. According to the method, the photocuring 3D printing technology is combined, accurate design of the macroscopic shape and the microstructure of the evaporator is achieved, the surface microstructure of the evaporator is one or more of a spherical structure, a prismatic table structure and a tree-shaped structure, and the evaporation rate can be increased.

The present application relates to a kind of electric heating type liquid crystal elastomer artificial muscle and its preparation method, belong to intelligent polymer material technical field, solve the technical problem that weak deformation capacity of liquid crystal elastomer artificial muscle filler in prior art is too much to be hard and brittle easily.The electric heating type liquid crystal elastomer artificial muscle of the present application includes two layers of liquid crystal elastomer film and electric heating element;Electric heating element is set between two layers of liquid crystal elastomer film;The raw material of liquid crystal elastomer film includes liquid crystal base element, chain extender, crosslinking agent and catalyst;Wherein, liquid crystal base element is 1,4- Bis-[4-(3-acryloyloxy propoxy) benzoyloxy]-2-methyl benzene.The joule heat generated by electric heating element can activate liquid crystal elastomer, and will not limit the deformation of liquid crystal elastomer, so as to show the characteristics such as strong deformation ability, controllable heating mode and time, programmable drive;Also have self-sensing function, can be monitored and regulated shape change in real time according to the size of resistance.

The present application belongs to the technical field of natural product chemical modification, and particularly relates to a chemically modified rare ginsenoside derivative, a preparation method and application thereof. The present application takes rare ginsenoside as raw material, introduces a sulfate group by sulfating modification on the rare ginsenoside to obtain a chemically modified rare ginsenoside derivative; the modifier used in the sulfating modification is a sulfonating agent. The rare ginsenoside is synthesized by conversion with ginsenoside Rb1 as raw material and AlCl3 as catalyst in an ethanol system. The modification method of the present application is simple in operation steps, does not require special equipment, is suitable for large-scale production, and has a broad application prospect in the field of drug preparation development and the like.

The utility model discloses a kind of soft-start control circuit based on output voltage feedback, soft-start control circuit includes buffer circuit and control circuit, the buffer circuit includes operational amplifier;The buffer circuit is used to prevent the overshoot phenomenon of output voltage, makes output voltage curve change smooth;The control circuit includes capacitor, control tube, voltage divider component and discharge tube, the capacitor is connected with the drain of the discharge tube and the operational amplifier, the voltage divider component is connected with the capacitor and the control tube respectively;The control circuit is used to control soft-start time.The utility model can improve the response speed of soft-start control circuit, avoid appearing output voltage overshoot phenomenon;And it can accurately control soft-start time, effectively controllable limit in power-on process inrush current.

This utility model discloses a cultivation device for tissue culture seedlings, belonging to the technical field of cultivation devices. The device further includes an upper box body snapped onto the upper side of a base box; a second water pump is fixedly connected to the right side of the base box; a first water pump is fixedly connected to the right side of the upper box body; a water pipe is fixedly connected to the right side of the first water pump; a water tank is disposed on the outside of the base box; the second water pump and the water pipe are connected to the water tank; an atomizing nozzle is fixedly connected to the left side of the first water pump; a pair of sealing plugs are embedded on the front and rear sides of the upper box body respectively; by setting gauze mesh and ventilation holes, the air permeability of the tissue culture seedling roots is improved. Simultaneously, the gauze mesh prevents the soil and moisture in the soil from diffusing outwards, allowing a large amount of water to flow out from the mesh plate. The gauze mesh only absorbs a portion of the water and becomes moist, which is beneficial for the rapid growth of the tissue culture seedling roots. At the same time, the sealing plugs allow the tissue culture seedling leaves to come into contact with the air, facilitating control of the air exchange time between the inside of the upper box and the outside environment, thus improving cultivation efficiency.

This invention discloses a method for preparing Yuanjiang asparagus extract and its application. The method uses fresh Yuanjiang asparagus tender stems as raw material. After selection, washing, freeze-drying, pulverizing, and sieving, choline chloride and 1,2-propanediol eutectic solvent are added for constant-temperature extraction. After ultrasonic temperature control, cellulase and pectinase are added for complex enzymatic hydrolysis. After heating to inactivate the enzymes, centrifugation is performed, and the supernatant is collected to obtain the crude extract of Yuanjiang asparagus saponins. This method has high extraction efficiency, and the obtained asparagus saponins have strong antioxidant activity, exhibiting strong scavenging ability against DPPH, ABTS, and hydroxyl radicals, as well as Fe... 2+ The chelation rate was high, and it showed significant in vitro inhibitory effects on the proliferation of human colorectal cancer cells Caco-2 and human hepatocellular carcinoma cells HepG2. The raw material used in this method is fresh, tender stems of Yuanjiang asparagus, which is widely available and of excellent quality. The extraction process is green, environmentally friendly, and simple, not only improving the comprehensive utilization value of Yuanjiang asparagus but also providing a new method for extracting natural saponin active ingredients. The obtained asparagus saponins can be used to develop antioxidant and anti-tumor functional foods, showing potential market prospects.

The invention provides a high-conductivity acetylene carbon black aggregation state structure regulation and control method which is characterized in that a gas-solid mixture of acetylene and carbon black seed crystals is used as a raw material, and the method comprises the following steps: step 1, heating the raw material to a preset temperature to pre-activate acetylene; 2, dividing an acetylene cracking reaction area into a nucleation area, a cross-linking area and a shaping area, setting different temperatures in the three areas, and enabling acetylene to sequentially flow through the nucleation area, the cross-linking area and the shaping area for reaction to generate acetylene carbon black; and 3, quantitatively conveying a cooling medium to cool the acetylene carbon black, so that the cooling rate of the acetylene carbon black is stable. The invention discloses a reaction tower for preparing a high-conductivity acetylene carbon black aggregation structure. The reaction tower comprises a mixing section, a preheating section, a nucleation section, a crosslinking section, a shaping section and a cooling section from top to bottom, a heat insulation layer is arranged between every two adjacent sections of the nucleating section, the cross-linking section, the shaping section and the cooling section.

The invention discloses an elevator star sealing contactor contact adhesion test method, which comprises a display system, a control system, a driving system and an execution system, and is characterized in that the control system comprises a solid-state relay, and the display system comprises a switch; the test method comprises the following steps: S1, a variable voltage regulator is adopted to supply power to a system, and voltage is regulated to a voltage value matched with the load demand of a tested elevator star sealing contactor; s2, outputting a solid-state signal through a control system, controlling a solid-state relay to work in a random voltage switching SCR output mode, and shortening the link transmission time and controlling the detected star sealing contactor to act at high frequency by utilizing the high-speed response low-delay characteristic of the solid-state relay; meanwhile, feedback signals of a solid-state relay are collected, and the delay time of a control system of the system is obtained through calculation of a built-in algorithm of the control system, so that the contact feedback time of the star sealing contactor is accurately calculated. The testing process is transparent, data are clear, real-time monitoring is achieved, and results are judged in real time.

This utility model discloses a lecithin spraying device, comprising: a base, a first frame fixedly connected to the upper surface of the base, a raw material box on the frame, a feeding hopper on the upper part of the raw material box for easy feeding; a stirring plate below the raw material box, a first motor connected to the side of the stirring plate, the motor driving a first stirring plate through a stirring shaft to achieve initial stirring. A first inclined pipe is connected below the stirring plate, the other end of the inclined pipe leading to a stirring tank, a second motor above the stirring tank driving a first rotating rod to drive a second stirring plate for secondary mixing. A drop pipe is provided outside the stirring tank, connected to a storage tank for collecting the mixed liquid. A liquid inlet pipe is provided above the stirring tank, and a spray pipe is connected to the bottom to achieve water spraying and mixing; a water pump is provided on the liquid inlet pipe, fixed to the first frame, the water pump is connected to a water storage tank through a water inlet pipe, and equipped with a valve to control the water flow rate. This device has a compact structure, automatic stirring and spraying functions, is easy to operate, and is suitable for the spraying preparation and processing of raw materials such as lecithin.