32results about How to "Increase the effective contact surface" patented technology

The invention discloses a production method of ultra-pure electronic grade phosphoric acid, comprising the following steps of: (1) vaporizing high purity phosphorous oxychloride by heating and allowing phosphorous oxychloride steam to enter a phosphoric acid generator; (2) heating high purity water to prepare water vapor, and allowing water vapor to enter the phosphoric acid generator; (3) adjusting the mass ratio of water vapor to phosphorous oxychloride steam in the phosphoric acid generator, conducting a reaction to generate ultra-pure phosphoric acid and hydrogen chloride steam, adding phosphoric acid into a liquid collection tank, removing bubbles from hydrogen chloride and putting it into a hydrochloric acid liquid trap; (4) heating the obtained phosphoric acid, and separating hydrogen chloride under vacuum to obtain ultra-pure electronic grade phosphoric acid; and (5) allowing the obtained hydrochloric acid to enter an evaporator, vaporizing a hydrogen chloride gas, carrying out cyclic absorption by the use of an absorption liquid to obtain high purity hydrochloric acid; and carrying out condensation and despumation on the tail gas which has undergone absorption, and allowing the tail gas to pass through a tail gas tower and to be discharged into the atmosphere. According to the invention, the gas phase reaction between phosphorous oxychloride and water vapor is conducted, contact surface of reactants is enlarged, reaction speed is effectively controlled, and the contents of water and hydrogen chloride in phosphoric acid are controlled. Therefore, the ultra-pure electronic grade phosphoric acid can be prepared with a by-product of high purity hydrochloric acid.

A device for aerating wine in a bottle has an elongated, upright conduit with one end region immersed in the wine, and an opposite end region exposed to the atmosphere. A rotary shaft is located within, and extends along, the conduit. A wine blade is mounted on the shaft for drawing the wine as a wine flow into the one end region in an upward direction toward the opposite end region of the conduit upon rotation of the shaft. An air blade is preferably mounted on the shaft for causing the air to move as an air stream into the opposite end region in a downward direction toward the one end region of the conduit upon rotation of the shaft. A drive rotates the shaft, the wine blades and the air blades to propel the wine flow and the air stream against each other in a mutually countercurrent relationship and to commingle the wine flow and the air stream inside the bottle.

The present invention discloses a dual-grounding device applied to a transformer station guardrail. The device comprises a U-shaped grounding block arranged at the lower end of the guardrail, and the surface, opposite to the guardrail, of the grounding block is provided with grounding wires. The upper end of the grounding wires is fixedly connected with the grounding block through connection bolts and lock nuts, and the connection bolts pass through the guardrail and then are connected with a grounding pole arranged in the guardrail. The lower ends of the grounding pole and the grounding wires are connected with a grounding grid, the upper end of the grounding pole is provided with an upper location boss, and the upper location boss is provided with a spring pin. The middle portion o the grounding pole is provided with a lower location boss which is matched with an annular boss arranged at the lower end of the guardrail, and a jack is arranged between the upper location boss and the lower location boss. A shielding cover is arranged at the external portion, located at the grounding block, of the guardrail. The dual-grounding device applied to the transformer station guardrail employs the double grounding wires to greatly improve the grounding reliability.

The invention discloses a novel handcart grounding device of a switch cabinet, which comprises a handcart grounding contact, a cabinet body grounding bar and a fixing board, wherein the handcart grounding contact comprises a handcart grounding bar, a handcart grounding strip I, a handcart grounding strip II, a spring I, a spring II, a bolt I and a bolt II; the fixing board is fixed on a cabinet body bottom board, and the cabinet body grounding bar is fixed on the fixing board; and the handcart grounding contact is fixed on the front end surface of the high-voltage side of a handcart bottom board. The invention has the characteristics of low integral cost, strong matching property, high electrical parameters, strong generality and the like; and when a handcart is pushed in or pulled out, the precise positioning of the handcart can be realized by the interaction between the handcart grounding contact and the cabinet body grounding bar.

The invention relates to a preparation method for continuously and stably producing highly etherified hexamethoxymethyl melamine, and mainly solves the problems of unstable quality, high content of free formaldehyde, high moisture and long reaction time of hexamethoxymethyl melamine in the prior art. The method comprises the following steps: continuously adding melamine, formaldehyde and a catalyst I into a double-screw reactor for hydroxymethylation reaction to obtain a material I; continuously feeding the material I into a vacuum drying machine for drying, and grinding the material I to obtain hexamethylol melamine powder II; continuously conveying the material II, methanol and a catalyst II into an etherification reaction kettle for etherification reaction to obtain a material III; continuously introducing the material III into a neutralization kettle, adding a terminating agent, and terminating the etherification reaction to obtain a material IV; and continuously distilling and filtering the material IV to obtain the final product hexamethoxymethyl melamine. According to the technical scheme, a relatively good technical effect is achieved.

The invention belongs to the field of metal soft magnetic materials, and particularly relates to a method for preparing an amorphous combined magnetic powder core. The method comprises the following steps that firstly, and two kinds of magnetic powder cores are respectively prepared, wherein the magnetic conductivity of one magnetic powder core differs by 200 from the magnetic conductivity of the other magnetic power core, the magnetic powder cores are in an equal-height cuboid shape, and two magnetic powder cores with the same magnetic conductivity are prepared; secondly, the four magnetic powder cores are spliced through magnetic conductive glue into a combined magnetic powder core, the top view of the combined magnetic powder core is in a hollow rectangular or square shape, and the method that the magnetic powder cores with the different magnetic conductivities are connected in spliced mode is adopted. A combined iron core is prepared through the same amorphous materials, the effective contact surface of the joint of the iron core is greatly increased, losses are reduced, and efficiency is improved.

A circular comb (16) fastened to a shaft (14) of a carding machine (1), rotatable about an axis of rotation (13) in a carding direction (26), the card being configured to card textile fibers (2) and having Fixed draw-off rolls (7, 8, 9, 10) for carded textile fibers (11). The circular comb (16) has: a circular comb body unit (17) with an exterior (18); a combing segment (19) with a plurality of combing bars (22) arranged on the exterior (18) of the circular comb body unit (17) , the combing bar is equipped with outwardly protruding combing teeth (23), so that when viewed in said combing direction (26), its front combing teeth sides are each inclined along said combing direction (26); and an alignment section (20) arranged in the exterior (18) of the circular comb body unit (17) and provided with a plurality of outwardly protruding alignment features (25) such that when viewed in said combing direction (26), The front alignment member sides are each inclined opposite to the carding direction (26) and some of them are arranged one behind the other when viewed in the carding direction (26).

A heat tube has the thermal conductivity much higher than that of any pure metal material; due to the tubular structure of the heat tube, especially a capillary pulsation heat tube with a smaller diameter, and the presence of non-ideal contact surfaces between a heat source and the heat tube and between a heat-dissipation device and a heat tube shape in the application, the formation of thermal resistance has become an important bottleneck in the popularization and application of the heat tube. A solution with high degree of mechanization and low cost is adopted in the invention to produce a double-layer pulsation heat-conducting plate strip; the plate strip realizes double-layer pulsation heat-conduction, is efficient and safe, and is convenient to be divided to change the length according different application occasions.

The invention provides an antiskid rubber product which is prepared by mixing, peeling and making materials into a stripe. Wave fold line type stripes are arranged on the surface of the antiskid rubber product. The antiskid rubber product is prepared from the following materials in parts by mass: 100 parts of matrix rubber, 50 to 130 parts of fiber, 1 to 2 parts of a coupling agent, 3 to 10 partsof an active agent, 0 to 15 parts of softening oil, 1.5 to 2.5 parts of an accelerator and 1.5 to 2.5 parts of a crosslinking agent, wherein the matrix rubber is one or several in natural rubber, butadiene rubber and nitrile rubber. The invention further provides a preparation method and application of the antiskid rubber product. The surface friction of the product disclosed by the invention is increased, so that a covered product has good antiskid performance. The wave fold line type stripes are arranged on the surface of the rubber product disclosed by the invention, so that an effective contact face of the product in a movement process is enlarged, and the product has good antiskid performance; furthermore, the surface fibers are evenly exposed, so that a strong multi-aspect antiskid function is achieved.