52results about How to "Change aperture" patented technology

The invention discloses a preparation method of a renewable low concentration CO2 high efficient absorption material, and aims to provide a preparation method of a renewable low concentration CO2 high efficient absorption material which has the advantages of low energy consumption, good absorption selectivity, and large absorption quantity of low partial pressure CO2. The technical scheme comprises the following steps: preparing silica sol and an amino siloxane solution, evenly mixing the silica sol and the amino siloxane solution, then mixing the mixed sol with dimethyl silicone oil, stirring to form suspension liquid, stirring at the same temperature of the sol until gel is formed; then heating the mixture to a temperature of 40 to 60 DEG C, allowing the mixture to stand still for aging for 1 to 9 days at a temperature of 40 to 60 DEG C, filtering to obtain the spherical gel; and finally putting the spherical gel and ethanol into supercritical drying equipment to dry the gel. The prepared renewable low concentration CO2 high efficient absorption material has the advantages of good uniformity, high nitrogen content, high specific surface area, large pore volume, and large CO2 absorption capacity.

A method for preparing a rice husk-based negative electrode material, belonging to the field of biomass energy chemical industry, the specific steps are: (1) pulverizing the rice husk and hydrolyzing it with dilute acid at 100°C-120°C for 0.5h-1h to prepare xylose solution and hydrolyzed slag ; (2) The hydrolysis slag is impregnated with zinc chloride and activated to prepare the primary negative electrode material; (3) The C / SiO2 porous negative electrode material is prepared by modifying the electrode pitch. Compared with the prior art, the advantages of the method of the present invention are as follows: (1) using rice husk as a raw material, using dilute acid hydrolysis pretreatment, regulating the ratio of carbon and silicon, and solving the problem of inner and outer silicon dioxide in pyrolytic carbon. The distribution of carbon and carbon is not uniform, and there are large pieces of carbon in the inner layer. Due to the different microstructure, the problem of lithium intercalation and delithiation is not synchronized to reduce the specific capacity; (2) the use of pitch to treat the primary negative electrode material improves the conductivity; The carbon structure improves the anti-powdering ability; the surface functional groups are covered to avoid leakage current and improve cycle stability.

The invention discloses a frame screen plate with screens convenient to replace. The frame screen plate comprises the first screen, a first screen frame is arranged on the edge of the first screen, clamping structures are arranged on the two sides of the first screen frame, the clamping structures are connected with the first screen frame through fixing structures, the clamping structures are connected with a fixing frame, wherein the fixing frame comprises a first connecting plate, a second connecting plate is arranged at one end of the first connecting plate, an L-shaped fixing frame is formed between the first connecting plate and the second connecting plate, an opening is formed in the middle of the first connecting plate, each clamping structure comprises a first fixing block, one sides of the first fixing blocks are provided with concave sliding grooves, and the concave sliding grooves are in sliding connection with convex sliding blocks. The frame screen plate has the beneficialeffects that that the first screen can be replaced conveniently through clamping connection, then a lot of time is saved, the troublesome process of replacing is avoided, and the working efficiency is greatly improved.

The invention belongs to the technical field of hydraulic pumps, and discloses a high-reliability manual hydraulic pump, which includes a cylinder body, a valve body, and an oil inlet hole, an oil suction valve chamber, an oil outlet valve chamber and an oil outlet hole connected in sequence. The oil inlet hole, the oil suction valve chamber, the oil outlet valve chamber and the oil outlet hole are all arranged in the valve body, and an oil suction sealing ball is arranged on the oil inlet of the oil suction valve chamber, and by being arranged in the The first elastic member in the oil suction valve chamber seals the oil suction sealing ball on the oil inlet of the oil suction valve chamber; compared with the prior art, the oil delivery speed of the manual hydraulic pump of the present invention is doubled , The pressure holding performance has also been significantly improved, and it can be designed to be portable.

A porous sound absorption material and a processing method thereof. The invention is characterized in that porous sound absorption material is formed by several layers of sheet material with micro channel structure through combination and superposition pasting, a plurality of holes vertical to the superimposed and pasted sheet materials are arranged on the porous sound absorption material, a plurality of parallel micro channels are arranged in each layer of micro channel sheet material, and micro channels between two adjacent layers of micro channel sheets are mutually perpendicular to each other or at different angles. The processing method is as below: using a thermoplastic polymer as a raw material; extruding, stretching and forming the material by an extrusion device with a specially designed headpiece; then setting, rolling and cutting, and choosing an appropriate number of superposition according to the application need; and finally opening holes with different diameters to obtain the porous sound absorption material. The porous sound absorption material provided by the invention has double characteristics of porous foamed material and resonance plate structure, high and low frequency sound absorption function, excellent comprehensive performance; and the processing technology is simple, environment-friendly and low in cost.

The present invention is applicable to the technical field of nanofiber membranes, and provides a method for controlling the pore structure of nanofiber membranes, which comprises the following steps: preparing a polymer spinning solution; adding a regulator to the polymer spinning solution for mixing and dispersing to obtain regulating solution; the regulating agent includes nano silicon dioxide, polyethylene glycol, myristic acid, isobutyl triethoxy silicon, water; after filtering the regulating solution, electrospinning is carried out to obtain a nanofibrous membrane . In the present invention, after adding a regulating agent to the polymer spinning solution, and then performing electrospinning, the pore structure of the nanofiber membrane can be adjusted by adjusting the amount of the regulating agent added, so as to change the pore size and Porosity. This control method can realize the control of the pore structure of the nanofiber membrane only by changing the addition amount of the regulator, and it can realize a wide range of control of the pore size and porosity of the nanofiber membrane without changing the process parameters of electrospinning .