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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 4. Отображено 4.
07-07-2023 дата публикации

High-water-resistance magnesium oxychloride cement and preparation method thereof

Номер: CN116396049A
Автор: LIAO YISHUN, XU HAO, DONG XINGZHI, CHEN YINGXUE, YU JINGSHUO, CHEN MINGYANG, CHEN PANTONG, MA SHENGDONG, WU YONG, DU YONGHUI
Принадлежит:

The invention relates to the technical field of inorganic cementing materials, in particular to high-water-resistance magnesium oxychloride cement and a preparation method thereof. The high-water-resistance magnesium oxychloride cement is prepared from the following raw materials: light calcined magnesia, magnesium chloride hexahydrate and a retarder. According to the invention, by adjusting the ratio of the light calcined magnesia to the magnesium chloride hexahydrate to the water, only one retarder is used for modifying the magnesium oxychloride cement, and acid radical ions in the retarder are coordinated with Mg < 2 + >, so that the stability of a hydration product in the water is enhanced, and the hydration product has better water resistance. Compared with other magnesium oxychloride cement water resistance modification modes, the magnesium oxychloride cement water resistance modification method is simpler, the production cost is lower, and the application range of the magnesium oxychloride ...

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Номер записи: 1
27-08-2021 дата публикации

Full-channel-width flow meter

Номер: CN214066203U
Автор: ZHAO ZHIWEI, WANG YONGPING, BAO ZIYUN, MA SHENGDONG, MA TENGJIAO, MA NAN, LI SHUAI, XIA SHIJIE, TIAN PENG, 赵志伟, 王永平, 鲍子云, 马升东, 马腾蛟, 马楠, 李帅, 夏石杰, 田鹏
Принадлежит: NINGXIA HUI AUTONOMOUS REGION WATER CONSERVANCY SCIENCE RES INSTITUTE, KAIFENG KAILIU METER CO LTD, NINGXIA XIAYU WATER SAVING TECH CO LTD, NINGXIA HUI AUTONOMOUS REGION WATER CONSERVANCY SCIENCE RESEARCH INSTITUTE, KAIFENG KAILIU METER CO., LTD., NINGXIA XIAYU WATER SAVING TECHNOLOGY CO., LTD., 宁夏回族自治区水利科学研究院, 开封开流仪表有限公司, 宁夏夏禹节水科技有限公司

The utility model provides a full-channel-width flow meter which comprises a flow meter box body, a front opening convenient for liquid to flow in is fixedly arranged at the front end of the flow meter box body, and a rear opening is fixedly arranged at the rear end of the flow meter box body; a controller and a data processing module are arranged in the control box, the controller is electrically connected with the data processing module, and the control box is fixedly arranged at the upper end of the flow meter box body; the liquid level sensors are sequentially arranged on the inner wall of the flow meter box body, and the liquid level sensors are electrically connected with a data processing module in the control box; the flow velocity sensors are sequentially arranged at the bottom of the flow meter box body, and the flow velocity sensors are electrically connected with a data processing module in the control box; and the excitation module is electrically connected with the controller ...

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Номер записи: 2
27-03-2018 дата публикации

A tool assembly for processing of small -size thin wall cylinder part

Номер: CN0207139304U
Автор: WANG XIN, MA SHENGDONG, LI WEI, DONG CHUNBO, LI FALU
Принадлежит: YANTAI WANLONG VACUUM METALLURGY CO LTD, YANTAI WANLONG VACUUM METALLURGY CO., LTD.

The utility model relates to a tool assembly for processing of small -size thin wall cylinder part, including turning hole frock and finish turning terminal surface frock, finish turning terminal surface frock includes finish turning terminal surface frock body, this internally is equipped with first through -hole the frock, finish turning terminal surface frock body includes the positioning seatand sets up annular boss on the positioning seat, the annular boss is used for supporting waits to process the work piece, the equipartition has many screw holes on the positioning seat, install the screw that is used for the location to wait to process the work piece on the screw hole, have good stability, can bear very big cutting force, the machining precision is high, and the machining dimension precision can reach 0.03mm, the deflection is little, and holecoaxiality, terminal surface hole hang down straightness and all be less than 0.03mm in the excircle, the applicable product that is less ...

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Номер записи: 3
27-03-2018 дата публикации

Large -scale thin wall cylinder part's processing frock

Номер: CN0207139349U
Автор: MA SHENGDONG, ZHONG CHONGMING, ZHANG QIANQIAN, ZHOU ZHOU, WANG HANDONG
Принадлежит: YANTAI WANLONG VACUUM METALLURGY CO LTD, YANTAI WANLONG VACUUM METALLURGY CO., LTD.

The utility model relates to a large -scale thin wall cylinder part's processing frock, including base, pull rod and apron, the apron is used for compressing tightly waits to process the work piece, be equipped with a plurality of first outside fix holes and a plurality of first interior locating hole on the base, it is a plurality of the outer loop configuration that first outside fix hole shapebecomes and waits to process work piece excircle phase adaptation, it is a plurality of fix a position the interior loop configuration that the hole shape becomes and waits to process the interior circumference looks adaptation of work piece in first, be equipped with on the apron with first outside fix hole with corresponding second outside fix hole and the interior locating hole of second of locating hole difference in first, the pull rod passes first outside fix hole and second outside fix hole will the base with cover connection perhaps the pull rod passes in first the locating hole with the ...

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Номер записи: 4