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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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Форма поиска

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 31. Отображено 31.
06-06-2023 дата публикации

投光灯透镜(yl-100w)

Номер: CN308069593S
Автор: 尹亮
Принадлежит: 尹亮

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21-04-2023 дата публикации

Self-adaptive high-speed coding method and system

Номер: CN115991055A
Принадлежит:

The invention relates to a self-adaptive high-speed code printing method and system. The method comprises the following steps: S10, generating a code printing rule according to information input by a user; s20, the code printing terminal reads a predetermined number of traceability codes from the traceability code cache queue, generates multiple pieces of code printing information according to the code printing rule, and stores the code printing information in a local printing cache queue of the printer; s30, when it is detected that the cigarette case moves on the production line, a code printing trigger signal corresponding to the cigarette case moving speed is generated; s40, the printer takes out the coding information in the local printing buffer queue according to the coding trigger signal, and codes are printed in sequence according to the configured trigger mode; and S50, the steps S20-S40 are repeated until the printing task is finished. According to the invention, intelligent ...

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04-04-2023 дата публикации

Solar panel electric push rod with multiple adjusting functions

Номер: CN115913071A
Принадлежит:

The invention discloses a solar panel electric push rod with multiple adjustment functions, and relates to the technical field of electric push rods. The solar panel electric push rod with the multiple adjusting functions comprises a push rod body and a connecting frame, a sliding block is installed at the output end of the push rod body, the push rod body can control the connecting frame to rotate through the sliding block so as to adjust the elevation angle of the connecting frame, and a solar panel is fixed to the connecting frame. According to the solar panel electric push rod with the multiple adjustment functions, the inclination angle of a solar panel can be controlled by arranging the air bin, the ejector rod, the micro air pump and the connecting frame, so that the light energy absorption effect of the solar panel in the using process is improved; and meanwhile, a movable button, an adjusting bolt and a fixing nut are arranged, so that the solar panel on the connecting frame can ...

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16-07-2020 дата публикации

SAMPLE ANALYSIS DEVICE AND ESTIMATION METHOD FOR REAGENT DISTRIBUTION

Номер: WO2020142874A1
Принадлежит:

A sample analysis device and an estimation method for reagent distribution. After a user inputs sample information and reagent distribution information, the sample analysis device can simulate a test process of a sample according to the sample information and the reagent distribution information, calculate estimation data used for estimating a distribution effect of the reagent distribution information according to the test process, and display estimation data to the user; and the user can learn the distribution effect of the reagent distribution information according to the estimation data, thus achieving the aim of the sample analysis device estimating a reagent distribution effect.

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30-05-2023 дата публикации

Doubly-fed fan fault ride-through system based on storage battery and superconducting hybrid energy storage

Номер: CN116191532A
Принадлежит:

The invention provides a doubly-fed fan fault ride-through system based on a storage battery and superconducting hybrid energy storage, which comprises a doubly-fed fan, a transformer, a converter, a series transformer and a compensation device, and is characterized in that the stator side of the doubly-fed fan is directly connected with the transformer, the rotor side of the doubly-fed fan is connected with the transformer through the converter, and the series transformer is connected with the compensation device through the converter. The transformer is connected to a power grid; wherein the series transformer is arranged between the transformer and the power grid, the series transformer is connected with the compensation device, and the compensation device comprises a storage battery and a superconducting energy storage device which are connected in parallel. According to the system, the voltage at the outlet of the doubly-fed fan can be completely compensated, the effect of isolating ...

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28-07-2023 дата публикации

Encryption authentication method and system, storage medium and computer equipment

Номер: CN116506107A
Принадлежит:

The invention discloses an encryption authentication method, an encryption authentication system, a storage medium and computer equipment, certificateless encryption authentication is realized in a group, the encryption authentication process is simple, and the encryption authentication method is adaptive to a terminal with low computing storage resources.

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21-07-2023 дата публикации

Substation secondary equipment and virtual protection closed-loop test system and method

Номер: CN116467201A
Принадлежит:

The invention discloses a substation secondary equipment and virtual protection closed-loop test system and method, and the method comprises the steps: obtaining the primary voltage, current and time identification of the simulation calculation of a substation primary system model, converting the primary voltage and current into secondary voltage and current, and inputting the secondary voltage and current into a substation secondary protection system model; performing simulation calculation according to the time identifier to obtain a protection action real signal; the virtual protection platform calculates and obtains a protection action virtual signal according to the primary voltage and current and based on the established protection logic algorithm and the time identifier; and the virtual protection platform tests and modifies the established protection logic algorithm in real time according to the protection action real signal and the protection action virtual signal. According to ...

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11-07-2023 дата публикации

Relay protection test device for intelligent substation

Номер: CN116413519A
Принадлежит:

The invention belongs to the technical field of relay protection equipment, and particularly relates to an intelligent substation relay protection test device which comprises an upper cover plate and a lower cover plate, and an operation keyboard is embedded in the upper surface of the lower cover plate. The protection assembly is arranged on the side, opposite to the display screen, of the upper cover plate, so that the display screen and the multiple wiring holes are staggered, the situation that the multiple wiring holes occupy too much space on the side of the display screen can be effectively avoided, larger size space can be provided for the display screen, data in the display screen can be conveniently displayed and observed, and the display effect is improved. Meanwhile, wiring holes and test lines can be hidden between the containing groove and the L-shaped cover plate, the overall use attractiveness of the equipment can be improved, the multiple wiring holes are distributed in ...

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16-07-2020 дата публикации

SAMPLE ANALYSIS DEVICE AND REAGENT DISTRIBUTION METHOD

Номер: WO2020142872A1
Принадлежит:

A sample analysis device and a reagent distribution method, the reagent distribution method comprising: acquiring project information inputted by a user by means of an input device (10) and a target index for reagent distribution; determining sample information to be used from statistical data according to the project information; determining a plurality of pre-selected reagent distribution manners according to the project information and reagent units (S) of a sample analysis device, wherein there are at least two reagent units (S); calculating index data corresponding to each pre-selected reagent distribution manner according to the sample information and the project information; and determining a reagent distribution manner that meets the target index according to the index data, and displaying same to the user. Since the reagent distribution manner may be determined according to historical statistical data, a guide scheme for reagent distribution is provided to the user, so that the ...

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23-12-2010 дата публикации

INTELLIGENT MONITORING SYSTEM FOR PUMPING ROD

Номер: WO2010145204A1
Принадлежит:

An intelligent monitoring system for pumping rod includes a monitoring center (1), a wireless telecommunication device (2) communicating with the monitoring center (1), a motion detection and storage device (4) for the pumping rod connected with the wireless telecommunication device (2), a radio frequency reader (3) connected with the motion detection and storage device (4) for the pumping rod and a frequency memory chip (5) provided on the pumping rod. The monitoring system not only implements detecting and recording of the count of reciprocating movement or rotational movement of the pumping rod, but also, implements monitoring of the motion state of the pumping rod in a wellbore.

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09-05-2023 дата публикации

Method for locking distance element of photovoltaic power station sending-out line

Номер: CN116093898A
Принадлежит:

The invention discloses a distance three-section protection locking method for a photovoltaic power station sending-out line. The method comprises the following steps: firstly, after distance three-section protection is started, extracting a phase current component of a protected line, calculating the third harmonic content of the phase current component and the ratio of the third harmonic to the second harmonic, and when the third harmonic content of the phase current component exceeds 0.5 and the ratio of the third harmonic to the second harmonic exceeds 1.5, judging that the distance three-section protection is locked by sympathetic inrush current; otherwise, determining that the fault current is open distance three-section protection. According to the method, the sympathetic inrush current and the magnetizing inrush current generated by no-load closing of the boosting transformer of the photovoltaic power station can be correctly judged, and incorrect protection action caused by too ...

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05-07-2018 дата публикации

POWER GRID MODEL ON-LINE CALIBRATION METHOD, DEVICE, AND STORAGE MEDIUM

Номер: WO2018120893A1
Принадлежит:

A power grid model on-line calibration method, a device, and a storage medium. The method comprises the following steps: establishing power grid model calibration rules and configuring a calibration operational process (101); constructing a calibration object of a power grid model (102); calibrating the calibration object on the basis of the power grid model calibration rules and the calibration operational process (103); and at least storing a calibration event of three dimensions comprising: personnel operational information, calibration information and time, and the calibration object (104).

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29-08-2023 дата публикации

Portable test terminal of network security power monitoring system

Номер: CN116660642A
Принадлежит:

The invention relates to the technical field of power monitoring system test terminals, and discloses a portable test terminal of a network security power monitoring system, which comprises a shell I. A terminal is fixedly mounted at the left end of the outer wall of the shell I. A touch screen is rotatably connected to the upper end of the left side of the outer wall of the terminal. A key is fixedly installed on the left side of the outer wall of the terminal, a middle block is fixedly installed at the front end of the outer wall of the first shell, and a second shell is fixedly installed at the front end of the outer wall of the middle block. A locking screw can slide back and forth to drive a sliding block to slide back and forth, when a sliding base slides back and forth, a first rotating shaft can be driven to move back and forth, so that a first rotating disc is driven to slide back and forth, the position of the sliding block can be locked by tightening the locking screw, and therefore ...

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02-06-2023 дата публикации

Formwork support construction method for high-altitude cantilever steel platform

Номер: CN116201357A
Принадлежит:

The invention relates to a high-altitude cantilever steel platform formwork support construction method. The method comprises the following steps that S1, a construction scheme is compiled, and specialists demonstrate; s2, selecting and processing main materials; s3, U-shaped anchor bolts are arranged; s4, the cantilever I-shaped steel beam is accurately positioned; s5, bottom steel pipe inclined supports are welded and fixed; s6, setting angle steel secondary beam welding; s7, laying a template; s8, enclosure protection construction; s9, cable-stayed steel wire rope construction; s10, checking and accepting; s11, vertical rod base steel bar heads are welded; s12, the cantilever steel beam is protected; s13, an external scaffold is erected; s14, an inner scaffold is erected; s15, checking and accepting; s16, structure construction is conducted; s17, the formwork support is monitored; according to the construction method, the defects that in the construction process of a traditional floor ...

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25-04-2023 дата публикации

Method for recycling uranyl ammonium tricarbonate crystallization mother liquor

Номер: CN116002760A
Принадлежит:

A method for recycling an ammonium uranyl tricarbonate crystallization mother liquor comprises the following steps: adding (NH4) 2U2O7 slurry and a (NH4) 2CO3 solution into an ammonium uranyl tricarbonate crystallization device, controlling the adding time, the crystallization temperature and the reaction time, and carrying out solid-liquid separation on the reacted product; slowly feeding the ammonium uranyl tricarbonate crystal into a calcining furnace to generate uranium dioxide and release a large amount of tail gas containing NH3 and CO2; respectively feeding the crystallization mother liquor and the calcination tail gas into an absorption tower for reaction to generate a (NH4) 2CO3 solution, analyzing the concentration of the (NH4) 2CO3 solution, and pumping the (NH4) 2CO3 solution into a stirring tank for collection when the concentration reaches 380g/L or above; and pumping the collected ammonium carbonate solution into the ammonium uranyl tricarbonate crystallization device again ...

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11-07-2023 дата публикации

Method for converting working state of handle based on image recognition

Номер: CN116416514A
Принадлежит:

The invention belongs to the technical field of image recognition, and particularly relates to a method for converting the working state of a handle based on image recognition, which comprises the following steps of: S1, performing simulation recognition training on a change-over switch of a relay protection screen cabinet and the state thereof, collecting training data and establishing a sample image database; and S2, carrying out image acquisition on the change-over switch of the relay protection screen cabinet through an image acquisition module of the mobile terminal. A sample image database is established through simulation recognition training, an image of the change-over switch is acquired through a mobile terminal image acquisition module and uploaded to a processing module, the processing module analyzes and processes the image, the acquired image data is compared with the sample image database, the corresponding change-over switch and the corresponding state are found, and the ...

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11-04-2023 дата публикации

Water protection type hollow steel pipe and shock insulation rubber support combined structure and implementation method

Номер: CN115949154A
Принадлежит:

The invention relates to a water protection type hollow steel pipe and shock insulation rubber support combined structure and an implementation method, water is injected into a hollow steel pipe, a flowing cooling full water column is formed after the hollow steel pipe is rapidly filled with water, and the water in the hollow steel pipe enters a water distribution channel through a round hole I and is uniformly sprayed out through a plurality of nozzles at the same time; sector-shaped water sprayed by the plurality of nozzles forms a water film/water mist heat insulation protective layer in a space formed by the upper fence, the lower fence and the peripheral vertical surfaces of the rubber body, and the water collected in the lower fence is discharged through the water guide pipe; and after the fire is extinguished, pressurized dry air is injected into the hollow steel pipe, and the air in the hollow steel pipe enters the water diversion channel through the round hole I and is uniformly ...

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22-06-2016 дата публикации

Caterpillar base plate of robot with accurate gear and from shock attenuation drive wheel

Номер: CN0205327211U
Принадлежит:

... 本实用新型提供一种带有精密齿轮传动装置和自减震驱动轮的机器人履带底盘,包括履带底盘、主动齿轮和自减震驱动轮,主动齿轮安装在履带底盘内,主动齿轮与过渡齿轮相啮合,主动齿轮通过过渡齿轮与从动齿轮连接,从动齿轮通过驱动轴连接自减震驱动轮,自减震驱动轮由轮圈、减震机构以及轮毂构成,自减震驱动轮通过摩擦或啮合,进而连接履带底盘;与现有技术相比,本实用新型具有如下的有益效果:履带底盘采用齿轮精密啮合传动,在履带底盘换向行驶时无虚位,无需多次补偿调整,采用自减震驱动轮,自减震驱动轮结构简单,可适应多种复杂工况。 ...

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23-06-2023 дата публикации

Intelligent substation simulation test device and method

Номер: CN116299132A
Принадлежит:

The invention belongs to the technical field of intelligent substations, and particularly relates to an intelligent substation simulation test device and method. The upper side of the base is fixedly connected with a shell; the upper side of the shell is fixedly connected with a mutual inductance assembly; a group of universal wheels are uniformly distributed on the lower side of the base; a telescopic cylinder is fixedly connected to the lower side of the base; the output end of the telescopic cylinder is fixedly connected with a movable plate; the lower side of the movable plate is fixedly connected with a conductive column, and the conductive column is electrically connected with the shell through a wire. A plurality of universal wheels are arranged on the lower side of the electronic mutual inductor, so that the mutual inductor is more convenient to move, a conductive column does not make contact with the ground when the mutual inductor is moved, mutual abrasion between the conductive ...

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13-06-2023 дата публикации

Automatic aiming system and method based on CV and AI algorithms and electromagnetic gun

Номер: CN116255863A
Автор: KE ZIYI, YIN LIANG
Принадлежит:

The invention provides an automatic aiming system based on CV and AI algorithms and an electromagnetic gun, the automatic aiming system comprises a chassis, a turntable, a camera, a gun barrel, a target identification module, a target tracking module and a bidirectional stabilization module, the turntable comprises an azimuth motor and a pitching motor, a gun seat is mounted at the upper part of a gun carriage, and the pitching motor drives the gun seat to adjust the pitching angle of the gun seat; the target recognition module is used for recognizing the position of a hit target and periodically measuring the distance between the target and the hit target, and the host uses a pyramid layering LK optical flow algorithm based on a CV algorithm to recognize the target and controls the rotary table to precisely move and track the target according to given angle information; the bidirectional stabilizing module is used for adjusting the pitch angle and the azimuth angle of the gun barrel in ...

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16-05-2023 дата публикации

Novel building material batching device

Номер: CN116116267A
Принадлежит:

The invention relates to a novel building material batching device which comprises a rack, a material storage box and a stirring box are sequentially arranged on the rack, a mounting column is arranged in the material storage box, a plurality of partition plates are arranged between the mounting column and the inner wall of the material storage box, the partition plates divide the material storage box into a plurality of material storage chambers, and the stirring box is arranged in the material storage chamber. The storage box is provided with a plurality of storage chambers, the bottom of each storage chamber is provided with a material leakage hole, and the bottom of the storage box is provided with a switch assembly for opening or closing the material leakage holes. Through the arrangement of the control unit, the switch assembly, the placing plate and the mass sensing assembly, the control unit can control a notch in the switch assembly to be aligned with the material leakage holes ...

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15-08-2023 дата публикации

Broadband oscillation suppression method, medium and system

Номер: CN116599033A
Принадлежит:

The invention discloses a broadband oscillation suppression method, medium and system, and the method comprises the steps: inputting characteristic data into a classifier model, and predicting the frequency range of broadband oscillation generated by a new energy grid-connected system in different frequency bands through the characteristic data, so as to enable the classifier model to generate a classification condition; inputting the actually obtained frequency and amplitude of broadband oscillation generated by the new energy grid-connected system into the classifier model, and enabling the classifier model to output a broadband oscillation suppression strategy based on the classification condition; and inputting the broadband oscillation suppression strategy into a first neural network, and outputting broadband oscillation suppression parameters so as to suppress broadband oscillation of the new energy grid-connected system through the broadband oscillation suppression parameters. According ...

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23-06-2023 дата публикации

Computer display card with dustproof function and convenient to assemble

Номер: CN116301239A
Автор: YIN OUYANG, YIN LIANG
Принадлежит:

The invention relates to the technical field of computer accessories, and discloses a computer graphics card with a dustproof function and convenient to assemble, the computer graphics card comprises a shell, a heat dissipation mechanism, a graphics card mainboard and an upper cover body are sequentially assembled in the shell from bottom to top, and the heat dissipation mechanism comprises a fan, heat dissipation fins and a filter plate which are sequentially installed from top to bottom; wherein a dust removal mechanism is arranged between the top of the filter plate and the display card mainboard, and an image detection mechanism, a control module, a volume detection mechanism and a position detection mechanism are further installed in the shell. By arranging the image detection mechanism, whether the surface of the graphics card mainboard needs to be dedusted or not can be recognized and judged through the image detection mechanism, and if dust needs to be removed, first judgment information ...

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23-06-2023 дата публикации

Electromagnetic pulse low-frequency therapeutic instrument with separated battery and control end

Номер: CN116271543A
Автор: YIN LIANG
Принадлежит:

The invention discloses a battery and control end separated electromagnetic pulse low-frequency therapeutic apparatus, which comprises a main body and a storage device, the top of the main body is provided with the storage device, the inner rear wall of the storage device is provided with a first motor, the output end of the first motor is provided with a rotating rod, one end of the rotating rod is provided with a clamping block, and the other end of the rotating rod is provided with a second motor. And clamping grooves are formed in the outer walls of the clamping blocks, first electric telescopic rods are installed on the inner top walls and the inner bottom walls of the clamping blocks correspondingly, and clamping plates are installed at one ends of the first electric telescopic rods. According to the device, a storage device is installed to store a cable, a first motor drives a rotating rod and a clamping block to rotate to the lower portion, a connecting wire is placed in a clamping ...

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14-07-2023 дата публикации

Prefabricated assembly type seismic isolation support system with fireproof and active self-cleaning functions and implementation method

Номер: CN116427555A
Принадлежит:

According to the prefabricated assembly type seismic isolation support system with the fireproof and active self-cleaning functions and the implementation method, when a fire disaster is found, a switching valve is switched to a B2 branch, a water supply pump and a water suction pump are started, water sequentially passes through the switching valve, a water inlet elbow, a water inlet hose and a plurality of water spraying coil pipes from a reservoir and is sprayed out of all conical nozzles, and the water spraying coil pipes are started; the vertical surface of the rubber body and a space formed by the vertical surface of the rubber body, the support upper plate and the water receiving tank are completely covered by water; water settled in the water receiving tank is conveyed into the water storage tank by the water suction pump; when the fire is extinguished, the air supply pump is turned on, the water supply pump is turned off, the switching valve is switched from a B2 branch to a B1 ...

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26-05-2023 дата публикации

Automatic feeding device capable of preventing wet ore from being bonded and blocked

Номер: CN116161448A
Принадлежит:

The invention discloses an automatic feeding device for preventing bonding and blocking of wet ore, and belongs to the technical field of material conveying. Comprising a stock bin, a rotary scattering structure and a spiral conveying structure, the stock bin comprises a U-shaped scattering stock bin body and a conveying stock bin body arranged at the bottom of the scattering stock bin body in a communicating mode, and a feeding port 3 is formed in the top of the scattering stock bin body; the roll shaft is connected with the output end of a driving speed reducer a arranged on the left side of the scattering bin, the spiral conveying structure comprises a shaftless spiral body arranged in the conveying bin, and the shaftless spiral body is connected with and drives the output end of a driving speed reducer b arranged on the right side of the conveying bin. The problems that in the background technology, materials adhere to the material bin wall of equipment, and materials above a spiral ...

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13-06-2023 дата публикации

Password service access control method and system based on security label

Номер: CN116260604A
Принадлежит:

The invention discloses a password service access control method and system based on a security label. The method comprises the following steps: receiving a request packet sent from an application system, and identifying whether the request packet has a security label, the security label being the security label of the application system; if the request packet has the security label, verifying the information integrity of the security label; if the information of the security tag is complete, analyzing the security tag, judging whether the security tag meets a password service access condition of the application system, and determining an analyzed data packet; if yes, security label information on the request packet is removed, the analyzed data packet is forwarded to a unified password service platform, and the unified password service platform relates to various password services and carries out fine-grained access control on numerous password services.

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29-06-2016 дата публикации

Type surface cooler prevents frostbite

Номер: CN0205351723U
Принадлежит:

... 本实用新型涉及换热设备技术领域,是一种防冻型表冷器,其包括供水集管、回水集管、换热盘管装置、框架,该换热盘管装置安装在框架上,该换热盘管装置包括不少于一层的换热盘管组,每层换热盘管组包括不少于二个的换热盘管即包括第一换热盘管和第二换热盘管,其特征在于还包括不少于一个的连通集管。本实用新型结构合理而紧凑,使用方便,本实用新型能够有效避免表冷器因结构原因造成的积水不能排空的问题,通过设置的连通集管可以有效的排出表冷器内部的积水,避免表冷器换热盘管在冬季冻坏,起到了有效的防冻保护作用,并且本实用新型也可以实现由于循环水水质较差所要进行的表冷器排污问题,同时本实用新型管材投资有所降低,经济性较好。 ...

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28-07-2023 дата публикации

Construction method for double-end connected cast-in-place pile and fore shaft pipe structure

Номер: CN116497802A
Принадлежит:

The invention provides a construction method of a double-end connected cast-in-place pile and fore shaft pipe structure, which comprises the following steps of: after a guide wall is completed, dividing pile positions and unit sections on the guide wall, dividing the unit sections into groove sections, and constructing single groove sections one by one: firstly, drilling a first hole in the divided initial groove section, forming double connecting holes, moving a grooving machine forwards, and performing guide spraying and guide deslagging; a second hole and a third hole are drilled, after drilling is completed, the trenching machine continues to move forwards, drilling of the third hole, the fourth hole and the fourth hole is conducted, the actions are repeated till drilling of the sixth hole is completed, and after drilling is completed, locking opening pipes with the same hole diameter are hoisted in the first hole and the sixth hole of the groove section; then steel reinforcement cages ...

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15-08-2023 дата публикации

Layered access control method and system for power regulation and control system

Номер: CN116599685A
Принадлежит:

The invention discloses a hierarchical access control method and system for a power regulation and control system, and the method comprises the steps: obtaining an attribute set of a data visitor and encrypted data of a pre-accessed data owner, and enabling the encrypted data to be a ciphertext encrypted by the data owner in advance based on a basic access control structure; the basic access structure is an access control structure which meets the lowest access requirement and is constructed after attribute grouping and layering are performed according to all attributes of the power regulation and control system and the relation among all the attributes in advance; and judging whether all attribute levels in the own attribute set are not lower than the attribute levels of the corresponding types in the basic access structure, if so, successfully decrypting and obtaining the plaintext, and if not, failing to decrypt and stopping access. The method has the advantages that the user attributes ...

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26-05-2023 дата публикации

Transformer differential protection harmonic braking auxiliary discrimination method

Номер: CN116169638A
Принадлежит:

The invention discloses a harmonic braking auxiliary discrimination method for transformer differential protection. Firstly, after a transformer differential protection harmonic braking criterion is started, phases of a differential current fundamental component and a second harmonic component are extracted, the phase difference of the fundamental component and the second harmonic component is calculated, when the phase difference is in a 00 or 1800 region, inrush current locking differential protection is judged, and if the phase difference exceeds the region, it is judged that a fault occurs, and the braking criterion is unlocked to protect an exit action. According to the method, the fault occurring when the transformer and the sympathetic inrush current occur can be correctly judged, and differential protection operation refusal or action delay caused by harmonic braking is avoided.

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