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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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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 17. Отображено 17.
21-07-2023 дата публикации

Pressure compensation method for hydraulic part shell in underwater environment

Номер: CN116464755A
Принадлежит:

The invention relates to a pressure compensation method for a hydraulic part shell in an underwater environment, which comprises the following steps of: providing an oil return pipeline, and connecting the oil return pipeline with the hydraulic part shell and an oil tank; and providing an adjusting valve, installing the adjusting valve on the oil return pipeline, and adjusting the internal pressure of the hydraulic part shell by using the adjusting valve so as to maintain the internal and external pressure difference of the hydraulic part shell within a set range. A hydraulic on-way resistance link is added between the hydraulic part shell and the oil tank through the oil return pipeline and the adjusting valve, the internal pressure and the external pressure of the hydraulic part shell are maintained within a set range by adjusting the internal pressure of the hydraulic part shell, and it is ensured that the hydraulic part shell is used safely in the underwater environment; and crushing ...

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25-08-2023 дата публикации

Segmented excavation type end plate suitable for underwater fishing equipment and sinking method of segmented excavation type end plate

Номер: CN116641435A
Принадлежит:

The invention relates to a segmental excavation type end plate suitable for underwater salvage equipment and a sinking method thereof.The segmental excavation type end plate comprises an end plate body, the face, used for making contact with a mud surface line, of the end plate body is a sinking face, the end plate body is divided into multiple segments of vertical body units along the sinking face, and the vertical body units are arranged on the end plate body; a first side of the body unit is provided with a lock catch groove along the vertical direction, and a second side of the body unit is provided with a lock catch strip matched with the lock catch groove along the vertical direction; and the plurality of excavation machine heads are used for excavating sludge, the plurality of excavation machine heads are fully arranged along the sinking surface and are all fixed on the end plate body, and at least one excavation machine head is arranged on each section of body unit. According to ...

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28-01-2015 дата публикации

Spherical articulated deviation rectification device for regulating attitude of rectangular tunneling machine

Номер: CN104314581A
Принадлежит:

The invention discloses a spherical articulated deviation rectification device for regulating the attitude of a rectangular tunneling machine. A spherical articulated surface structure is adopted, and the device comprises a front shell, an articulated sealing ring, a rear shell, a tensioning oil cylinder unit, an articulation oil cylinder unit and an articulation hydraulic control system, wherein the connecting surface of the front and rear shells is shaped into a spherical surface; a sealing groove is formed in the connecting surface; the articulated sealing ring is placed in the sealing groove to realize the articulated sealing of the front and rear shells; the tensioning oil cylinder unit is connected between the front and rear shells; the front and rear shells are always kept in a tensioning state through the tensioning oil cylinder unit; the articulated oil cylinder unit is connected between the front and rear shells, and extend and retract in different directions to realize deviation ...

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22-08-2023 дата публикации

Full-section excavation type end plate suitable for underwater fishing equipment and sinking method of full-section excavation type end plate

Номер: CN116623738A
Принадлежит:

The invention relates to a full-section excavation type end plate suitable for underwater salvage equipment and a sinking method of the full-section excavation type end plate, the full-section excavation type end plate comprises an end plate body and a plurality of excavation machine heads used for excavating sludge, and the face, used for making contact with a mud face line, of the end plate body is a sinking face. And the plurality of excavating machine heads are fully distributed along the sinking surface and are all fixed on the end plate body. According to the method, the excavation machine head is arranged on the sinking face of the end plate body, so that full-section excavation is achieved, it is guaranteed that the end plate structure is smoothly lowered without blockage, and the lowering efficiency is improved; the excavation machine head is arranged on the vertical axis, and it can be guaranteed that the lowering track does not deviate.

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30-05-2023 дата публикации

Production method for improving yield of TMCP type low-temperature high-strength steel plate

Номер: CN116179818A
Принадлежит:

The invention discloses a production method for improving the yield of a TMCP type low-temperature high-strength steel plate. The production method comprises the processes of casting blank smelting, TMCP rolling and water cooling after rolling. The casting blank obtained in the casting blank smelting process comprises the following chemical components in percentage by mass: 0.15%-0.20% of C, 0.20%-0.30% of Si, 0.90%-1.40% of Mn, less than or equal to 0.025% of P, less than or equal to 0.010% of S, 0.18%-0.25% of Cr, 0.010%-0.020% of Nb, more than or equal to 0.020% of Alt and the balance of Fe and inevitable impurities, wherein the carbon equivalent CEV is 0.40%-0.46%; in the TMCP rolling process, the initial rolling temperature of finish rolling is 840-860 DEG C, and the final rolling temperature is 800-820 DEG C; in the post-rolling water cooling process, the water inlet temperature is 790-810 DEG C, a post-rolling water cooling system is divided into four areas A/B/C/D, headers are distributed ...

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16-09-2015 дата публикации

Steel plate for low-temperature spherical tank container and production method thereof

Номер: CN104911319A
Принадлежит:

The invention discloses a steel plate for a low-temperature spherical tank container and a heat treatment production method thereof. The steel plate is prepared from less than or equal to 0.12wt% of C, 0.15-0.50wt% of Si, 1.2-1.6wt% of Mn, 0.3-0.8wt% of Ni, less than or equal to 0.010wt% of P, less than or equal to 0.005wt% of S, 0.020-0.045wt% of Al, less than or equal to 0.040wt% of Nb and the balance Fe and unavoidable impurities by melting. The steel plate utilizes low-price carbon and manganese solid solution reinforcement, and through adjustment optimization of a ratio of other elements in the steel plate, good steel plate mechanical properties are ensured under conditions of low carbon equivalent, the steel plate has a good microstructure, good comprehensive performances and welding performances, a cost is reduced and market competitiveness is improved. Through a reasonable heat treatment technology, a uniform ferrite-tempered sorbite microstructure is obtained and impact toughness ...

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21-01-2015 дата публикации

Underwater rotating target scale sonar imaging method and system

Номер: CN104297756A
Принадлежит:

The invention discloses an underwater rotating target scale sonar imaging method and system. The method comprises the following steps that target parameters and sonar system parameters are input; according to the target parameters and the sonar system parameters, sonar experimental parameters and target motion control system parameters are generated; according to the sonar experimental parameters and the target motion control system parameters, sonar echo signals are received; digital demodulation is performed on the received sonar echo signals so that demodulation signals can be generated; two-dimensional signal processing is performed on the demodulation signals so that a final imaging result can be obtained. According to the imaging method, the sonar echo signals are received according to the generated sonar experimental parameters and the generated target motion control system parameters, in addition, digital demodulation is performed so that the demodulation signals can be generated ...

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09-06-2010 дата публикации

Die casting method and die casting equipment for heavy section crack detection steel grade

Номер: CN0101722280A
Принадлежит:

The invention provides a die casting method and die casting equipment for heavy section crack detection steel grade. The die casting equipment comprises a hot top, thermal insulation slabs and a steel ingot mould, wherein the thermal insulation slabs are arranged at the periphery of the upper part of an inner wall of the steel ingot mould, and are closely contacted with the inner wall of the steel ingot mould; the upper edge of the thermal insulation slab and the upper edge of the steel ingot mould are parallel and level; and the upper part of the steel ingot mould is provided with the hot top. When die casting is carried out, molten steel which is refined and vacuumized is poured into the steel ingot by adopting a bottom pouring method; pouring is stopped when the pouring height reaches the upper edge of the thermal insulation slab; heat insulating materials are added into the hot top; the hot top is removed after the molten steel is solidified; and the steel ingot subjected to die casting ...

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02-09-2015 дата публикации

P440NL1 steel plate for oil groove tank car and production method of P440NL1 steel plate

Номер: CN104878294A
Принадлежит:

The invention discloses a P440NL1 steel plate for an oil groove tank car and a production method of the P440NL1 steel plate. The P440NL1 steel plate for the oil groove tank car comprises the following chemical components in percent by weight: 0.14-0.24% of C, 0.15-0.50% of Si, 1.30-1.65% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, less than or equal to 0.30% of Cu, 0.020-0.10% of V, 0.005-0.020% of Nb, less than or equal to 0.40% of Ni, 0.020-0.050% of Al, less than or equal to 0.53% of Cev and the balance of Fe and inevitable impurities. The P440NL1 steel plate for the oil groove tank car has the advantages that Cu-V-Ni design thought is adopted in composition design, the carbon content is high, the micro-alloy content is relatively low, and the cost is low; strength-toughness matching is realized, the yield strength is above 505MPa, the tensile strength is about 650-690MPa, and the intra-plate gauge deviation of the P440NL1 steel plate is relatively small ...

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19-02-2014 дата публикации

Simulation method and system for synthetic aperture sonar image

Номер: CN103593877A
Принадлежит:

The invention provides a simulation method and system for a synthetic aperture sonar image. The method comprises the following steps that synthetic aperture sonar parameters and a three-dimensional model of a scene are input; interpolation is conducted on the three-dimensional model to obtain a point cloud model of the scene, and an effective scattering point set is obtained according to the synthetic aperture sonar parameters and the point cloud model; the scattering intensity of a plurality of scattering points in the effective scattering point set is calculated; the scattering points in the effective scattering point set are mapped onto a two-dimensional imaging plane; according to the two-dimensional imaging plane, the response function of the scattering points is obtained; the final imaging result of the scene is obtained according to the response function of the scattering points. According to the simulation method and system for the synthetic aperture sonar image, the effective scattering ...

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04-04-2023 дата публикации

Floating operation platform of open caisson soil body excavation equipment

Номер: CN115897639A
Принадлежит:

The invention discloses a floating type operation platform of open caisson soil excavation equipment. The floating type operation platform comprises a platform frame (1), buoys (2), walkway plates (3), guardrails (4) and lifting rotating assemblies. The platform frame is of a cylindrical frame structure, a first hollow part (101) is formed in the middle of the platform frame, and the floating cylinder is embedded in the platform frame, so that the platform frame can float in the open caisson through the floating cylinder; the lifting rotating assembly is arranged in the center of the top of the platform frame, and the output end of the lifting rotating assembly penetrates through the first hollow part and is connected with the mechanical arm hanging bracket, so that the mechanical arm hanging bracket can ascend and descend in the open caisson through the lifting rotating assembly; the walkway plate is laid on the top face of the platform frame and located on the periphery of the lifting ...

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11-04-2023 дата публикации

Casting and heating method for large steel ingot

Номер: CN115945654A
Принадлежит:

The invention discloses a casting and heating method for a large steel ingot. The casting and heating method comprises a casting process and a heating process. In the casting process, an integrated steel ingot mold is adopted; the main body casting time is 17-25 minutes, and the main body casting time is 20-32 minutes, wherein the main body casting time is larger than or equal to 35 t and smaller than 45 t, and the main body casting time is 20-32 minutes; casting for 4-5 hours and then demolding; casting for 5-6 hours and then demolding after casting for 5-6 hours, wherein the ingot shape is greater than or equal to 35t and less than or equal to 45t; after demolding, the surface temperature of the steel ingot is 900-950 DEG C, and the steel ingot contains 3-5% of liquid core; the heating process comprises the following steps: after charging a steel ingot into a furnace, keeping the furnace temperature at 1000-1100 DEG C for 5-6 hours at a constant temperature; and then the furnace temperature ...

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28-04-2023 дата публикации

Six-degree-of-freedom underwater robot for vertical shaft tunneling

Номер: CN116025362A
Принадлежит:

The six-degree-of-freedom underwater robot comprises a fixed base (1), a rotary table assembly, a mechanical arm assembly, a swing driving part (3), a dredging pump (4) and a lifting driving part (5). The fixed base is fixedly installed in the center of the top of a cross beam of the open caisson structure, and the rotary table assembly is rotatably installed on the fixed base. The lifting driving part is fixedly installed on the rotary table assembly, one end of the mechanical arm assembly is rotationally connected with the driving end of the lifting driving part, and the bottom of the mechanical arm assembly is rotationally connected with the rotary table assembly, so that the mechanical arm assembly can synchronously and horizontally rotate along with the rotary table assembly and vertically rotate relative to the rotary table assembly through the lifting driving part; the dredging pump is installed at the other end of the mechanical arm assembly in a swing mode through the swing driving ...

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25-04-2023 дата публикации

Telescopic arm structure and water insulation method thereof

Номер: CN116002544A
Принадлежит:

The invention relates to a telescopic boom structure and a water insulation method thereof. The telescopic boom structure comprises a cylindrical first boom section and a second boom section, the first arm section is cylindrical, the second arm section is cylindrical, the size of the second arm section is matched with the size of the first arm section, the second arm section is inserted into the first arm section, the second arm section can be telescopically adjusted relative to the first arm section, and a gap between the second arm section and the first arm section ranges from 0 mm to 2 mm. According to the telescopic arm structure, the arm sections are cylindrical, so that the gaps between the arm sections are controlled to be as small as possible, large foreign matters are prevented from entering the telescopic arm structure, the foreign matters are prevented from abrading and clamping a structural part, invasion of the large foreign matters can be effectively prevented, and the effect ...

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25-03-2015 дата публикации

Rectangular shield segment test loading device

Номер: CN104458242A
Принадлежит:

The invention provides a rectangular shield segment test loading device. The rectangular shield segment test loading device comprises a frame, a plurality of sealed pull rods and a plurality of loading force-applying parts, wherein the frame is formed by splicing, is enclosed in a sealed mode along the outer wall outline of a shield segment and comprises a first side end surface and a second side end surface which are not sealed, the sealed pull rods are connected to the first side end surface and the second side end surface respectively, and the loading force-applying parts are fixedly connected to the inner wall of the frame, face the outer wall of the shield segment and apply test force. The rectangular shield segment test loading device solves the problems that an existing segment test loading device can not be applied to rectangular shield segments and is relatively complex in structure, the application range of the test loading device is further widened, and the structure of the test ...

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04-06-2014 дата публикации

Circular section synchronous rotary jet grouting device

Номер: CN103835730A
Принадлежит:

A circular section synchronous rotary spray grouting device comprises a steel pipe section, a grouting pipe and a plurality of sprayers. Two ends of the steel pipe section are connected with tool pipes. The grouting pipe is used for conveying grout. The sprayers are driven to rotate by a plurality of motors and used for grouting between the steel pipe section of a soil body. A peripheral annular groove and a conveying hole communicating with the grouting pipe are formed in the wall of the steel pipe section. A rotary ring is embedded in to the annular groove through slide support blocks on two sides and can rotate. A peripheral grout storage groove communicated with the conveying hole of the steel pipe section and a plurality of grout conveying holes communicated with the peripheral grout storage groove and axially penetrating the rotary ring are formed in the inner wall of the rotary ring. The sprayers are fixedly connected to the outer wall of the rotary ring and rotates along with the ...

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23-06-2023 дата публикации

Underwater excavation prefabricated open caisson bottom center offset measuring method

Номер: CN116291374A
Принадлежит:

The invention discloses an underwater excavation prefabricated open caisson bottom center offset measuring method which comprises the steps that 1, a fixed beam (2) is arranged in a blade foot ring (11) of an open caisson (1), and the center of the fixed beam is connected with a floating ball (4) through a hanging rope (3); 2, the floating ball floats on the water surface (5) through the hanging rope; 3, a binocular camera (6) is arranged above the floating ball, two cameras of the binocular camera are symmetrically located on the two sides of the floating ball, a measuring point coordinate model is established, and the coordinates of the center of the floating ball in a camera coordinate system are obtained through the binocular camera and the measuring point coordinate model; 4, calibrating a camera coordinate system, converting the camera coordinate system into a world coordinate system, and obtaining coordinates of the center of the floating ball in the world coordinate system; and ...

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