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154results about How to "Enough security" patented technology

Biogas digester

The invention provides a biogas digester which is used for solving the problem that waste of biogas is easily caused in the slag removal process in the conventional biogas digester. The biogas digester comprises a gas storage tank and a digester body in which a fermentation disc is arranged, wherein the top of the digester body is connected with a sealing cover; a lifting device which can drive the fermentation disc to translate up and down is arranged at the bottom of the fermentation disc; a gas inlet pipe and a gas outlet pipe are arranged between the gas storage tank and the digester body; a gas suction piece I is arranged in the gas inlet pipe; a sealing plate I and a sealing plate II are arranged in the gas storage tank; an elastic piece through which the sealing plate I has the tendency of sealing the gas inlet pipe is connected to the sealing plate I; a cylinder I through which the sealing plate II seals or opens the gas outlet pipe is connected to the sealing plate II; an exhaust pipe and a pressure gage are connected to the digester body; a gas suction piece II is arranged in the exhaust pipe; a sealing plate III is arranged at the end face of the exhaust pipe; and a spring I through which the sealing plate III has the tendency of sealing the exhaust pipe is arranged between the gas suction piece II and the sealing plate III. The biogas digester disclosed by the invention has the advantages that waste of biogas is avoided during slag removal.
Owner:JIAXING VOCATIONAL TECHN COLLEGE

High-altitude falling and drowning safety guaranteeing system for automobile and control method thereof

The invention provides a high-altitude falling and drowning safety guaranteeing system for an automobile and a control method thereof, which belongs to the technical field of automobiles. A problem of the prior art that the safety is not high is solved. The high-altitude falling and drowning safety guaranteeing system for the automobile comprises a control unit, an immersion sensor, a weightlessness signal sensor, a door lock controller, an automobile window controller and an engine controller, wherein the immersion sensor and the weightlessness signal sensor are connected with an input end of the control unit; and the door lock controller, the automobile window controller and the engine controller are connected with an output end of the control unit. The high-altitude falling and drowning safety guaranteeing control method for the automobile comprises the following steps of exerting the control unit to receive signals transmitted by the weightlessness signal sensor and the immersion sensor and to analyze and judge the received signals; and exerting the control unit to send a control signal to control automobile window closing, automobile door unlocking and engine fuel cutoff when a high-altitude falling accident or a drowning accident is judged. The high-altitude falling and drowning safety guaranteeing system for the automobile and the control method thereof, provided by the invention, is advantaged in that safety measures such as automobile door unlocking, fuel cutoff and so on are automatically executed for passengers on the automobile to escape in case of high-altitude falling and drowning.
Owner:宁波吉润汽车部件有限公司 +2

Columnar hydraulic tappet

The invention relates to a columnar hydraulic tappet which comprises a shell. A plunger is correspondingly installed in the shell. A high-pressure cavity for a hydraulic medium extends between a sealing base of the plunger and the lower side of the shell and can be sealed through a check valve which is opened towards the high-pressure cavity. An outer ring groove for hydraulic medium circulation is formed in the outer diameter of the shell, an inner ring groove for hydraulic medium circulation is formed in the radial inner side of the shell, and one or more shell oil holes are formed between the inner ring groove and the outer ring groove. The plunger is composed of a sealed hemispherical head portion, a rod portion and a body portion. The columnar hydraulic tappet is characterized in that an inward-concave neck portion is arranged between the head portion of the plunger and the rod portion of the plunger, and the wall thickness of the neck portion is 105% to 120% the wall thickness of the rest of the plunger. The columnar hydraulic tappet is simple and firm in structure, the design that the wall thickness of the low-strengthen area of the single-body thin-walled hollow plunger is increased is adopted, and therefore both the requirement for increasing the oil storage amount in the plunger and the requirement for improving fatigue strengthen are considered.
Owner:HANGZHOU XZB TECH

Smart home Internet of Things communication method based on AliCloud IoT Hub platform

The invention relates to the technical field of smart home and discloses a smart home Internet of Things communication method based on an AliCloud IoT Hub platform. On one hand, subscription message transmission between a network server and a home gateway is realized on an AliCloud IoT Hub platform by adopting an MQTT communication protocol. The timeliness of information transmission can be guaranteed by using the communication characteristics of the MQTT communication protocol, so that after a user terminal sends out the control request, target household equipment can execute and respond mostquickly, the receipt receiving time is shortened to the greatest extent, the use state of the household equipment can be updated quickly, and the timeliness requirement of a user is met; and on the other hand, the home gateway only needs to subscribe to one publish theme and one subscribe theme to complete the operation of a plurality of devices in the room, so that the purposes of economy, practicability and easiness in popularization can be achieved. In addition, the invention has the characteristics of gateway activation automation, convenience in equipment addition, easiness in multi-house management and the like, can provide a simple operation interface, and is convenient to operate.
Owner:无锡青起长升智能科技有限公司

Manufacture technique of tap shells for polar drill rigs

The invention discloses a manufacture technique of tap shells for polar drill rigs. The manufacture technique incudes: (1) for forging, performing forging via upsetting, punching, broaching and forming to guarantee a forging fiber flow line under the conditions that heating temperature is 1270-1310 DEG C, initial forging temperature is 1100-1250 DEG C and terminal temperature is not lower than 850 DEG C, performing annealing after forging under the condition that the heating temperature is 880+/-20 DEG C, and performing furnace cooling to enable tapping temperature not higher than 300 DEG C; (2) for heat treatment, normalizing at temperature of 880-900 DEG C prior to air cooling, quenching at temperature of 840-860 DEG C prior to oil cooling or cooling with a PAG quenching medium, tempering at temperature of 580+/-40 DEG C prior to air cooling, performing subcritical quenching at temperature of 790+/-10 DEG C prior to oil cooling or cooling with the PAG quenching medium, and tempering at temperature of 520-600 DEG C prior to air cooling; (3) for non-destructive inspection, finishing prior to machining a product according to size, and performing ultrasonic inspection and magnetic particle inspection, wherein the qualified level conforms to API Specification 8C standards. Compared with the prior art, the manufacture technique has the advantages that the tap shells manufactured with the technique have high strength to guarantee enough safety factor, adapt to polar regions (at the temperature of minus 60 DEG C) and meet the requirement on enough low temperature impact toughness so as to resist to the low-temperature environment of the polar regions.
Owner:RG PETRO MACHINERY GROUP

Traction running mechanism for climbing girder crane

InactiveCN102616651APrevent slippingOvercoming Nodal Slope VariationsBridge erection/assemblyWinding mechanismsLow speedPull force
The invention discloses a traction running mechanism for a climbing girder crane, which comprises the field of cranes. Traction hoisting machines comprise two low-speed hoisting machines which are fixed on an upper chassis of the crane in a bilateral symmetry manner ; two hoisting cable-pulley groups are symmetrically connected between the two traction hoisting machines of the upper chassis and corresponding front anchoring mechanisms; the pulling force of the traction hoisting machines is used for providing traction power and overcoming the downwards-sliding power caused by deadweight to pull the whole mechanism to move ahead; the design of the hoisting cable-pulley groups guarantees the stable movement direction of hoisting cables and provides sufficient safety factor assurance; a block brake is arranged at the output shaft end of a motor of the traction running mechanism; meanwhile, a disc brake is arranged on a winding drum wallboard; when the traction hoisting machine rotates, the tensile force of the hoisting cables can prevent the crane from sliding from a ramp; and when the traction hoisting machine is braked, the block brake and the disc brake can be started to realize double safety brake, so that the downwards-sliding of the crane caused by the counter revolution of the hoisting machine is effectively prevented, and the safety requirement is guaranteed.
Owner:WUHAN BRIDGE HEAVY INDS GROUP

Video conference calling method and video conference calling device

The invention relates to the field of video conference technologies, and discloses a video conference calling method and a video conference calling device. The video conference calling method includestransmitting request signals to second conference terminals or conference platforms by the aid of first conference terminals which support domestic password encryption algorithms; receiving feedbackinformation of the second conference terminals or the conference platforms by the aid of the first conference terminals; judging whether the second conference terminals support the domestic password encryption algorithms or not by the aid of the first conference terminals according to the feedback information; setting up conferences on the basis of the domestic password encryption algorithms by the aid of the first conference terminals and the second conference terminals when the fact that the second conference terminals support the domestic password encryption algorithms is determined, and carrying out encryption processing on data by the aid of the domestic password encryption algorithms. The data are transmitted in the conferences. The video conference calling method and the video conference calling device have the advantages that the domestic password encryption algorithms are applied to data transmission procedures in the video conferences on the premise that two ends support thedomestic password encryption algorithms, accordingly, the safety of data transmission in the video conferences can be sufficiently guaranteed, and the video conference calling method and the video conference calling device are favorable for promoting integration of national standards and international standards.
Owner:SUZHOU KEDA TECH

Pipe-in-pipe structure convenient for optical cable laying and replacing and laying method

The invention discloses a pipe-in-pipe structure convenient for optical cable laying and replacing and a laying method. The structure comprises a conveying pipeline and optical cable channels, whereinthe optical cable channels are divided into a plurality of sections; each section comprises a main body and lead-out sections at both ends; the main bodies are fixed on the inner wall of the conveying pipeline; the lead-out sections at both ends respectively pass through corresponding lead-out holes in the conveying pipeline to be led out of the conveying pipeline; and gaps at the lead-out holesare sealed. During laying, micro tubes are fixed on the inner wall of the conveying pipeline to form the optical cable channels and gaps among the micro tubes are sealed to prevent the micro tubes from gas leaking and water leaking; the micro tubes are led out of the conveying pipeline from the lead-out holes every 1500m to 2500m to form the lead-out sections and gaps between the micro tubes and the lead-out holes are sealed to avoid gas leakage and water leakage; optical cables are laid in the micro-tubes of each section and two ends of the optical cables are exposed out of the micro-tubes; and the optical cables of the adjacent sections are fused together, joints are protected by joint boxes and gaps between the optical cables and the micro tubes are sealed. After the micro tubes are laid, faulty optical cables in the micro tubes can be replaced at the lead-out sections without stopping of the medium conveying in the conveying pipeline.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1

Built-in electromagnetic-valve-type semi-active damping-continuous-adjustable shock absorber, and control method

The invention belongs to the technical field of vehicle damping devices and specifically relates to a built-in electromagnetic-valve-type semi-active damping-continuous-adjustable shock absorber, anda control method. The built-in electromagnetic-valve-type semi-active damping-continuous-adjustable shock absorber comprises a shock absorber body and a shock absorber control system and is characterized in that the shock absorber body comprises a working cylinder barrel, an oil storage cylinder barrel, a shock absorber dustproof cover, a bottom valve assembly, a piston assembly and an electromagnetic valve assembly. The invention also discloses the control method for the built-in damping-continuous-adjustable shock absorber. The control method is characterized in that continuous switching control of different modes can be realized for soft and hard damping of the shock absorber; an electromagnetic valve can be rationally integrated with a piston inside the damping-continuous-adjustable shock absorber; different cross section structures are adopted for a valve core; guidance structures are designed around the valve core, so the valve core is more stable; damping is realized, and damping adjustment of different comfort degrees can be realized; use is convenient; space is saved; use prospect is wide; and promotion and use are easy.
Owner:XIAN UNIV OF SCI & TECH

Screening method for lithium-ion storage battery

The invention discloses a screening method for a lithium-ion storage battery, belongs to the field of satellite power supply and aims to solve the problem that the production cost of a storage battery in an existing Pina satellite power supply subsystem is high. The method comprises the following steps: step (1) testing physical characteristics of all to-be-screened lithium-ion storage batteries to obtain the size and quality of the storage batteries, and weeding out the storage batteries of which the total run-out value is abnormal; step (2) testing electrochemical characteristics, and measuring open-circuit voltage; step (3) obtaining charging capacity and discharging capacity; step (4) performing a vibration test, comparing the vibration test with the last measurement, and weeding out the storage batteries of which the open-circuit voltage is abnormal or the charging and discharging capacity changes are abnormal; step (5) performing a vacuum leakage rate test, comparing the vacuum leakage rate test with the last measurement, weeding out the storage batteries of which the total run-out value, quality changes, charging and discharging capacity changes or open-circuit voltage changes are abnormal, and taking the rest lithium-ion storage batteries as the lithium-ion storage batteries obtained after screening. The storage batteries screened by the method disclosed by the invention are applied to the Pina satellite power supply subsystems.
Owner:HARBIN INST OF TECH

Recording and broadcasting data processing method and device

The present invention relates to the technical field of recording and broadcasting, and discloses a recording and broadcasting data processing method and device. The method comprises the steps that: arecording and broadcasting server receives a play request of a client; the recording and broadcasting server determine multimedia data required by the client and corresponding encryption keys according to the broadcasting request, wherein the multimedia data stored in the recording and broadcasting server are ciphertext data after encryption processing by a password device, and the correspondingencryption keys are ciphertext secret keys after encryption processing by the password device; the recording and broadcasting server transfers the password device, employs the password device to perform secondary processing of the multimedia data required by the client and the corresponding encryption keys and obtains the multimedia data and the corresponding encryption keys after secondary processing; the recording and broadcasting server sends the multimedia data after secondary processing to the client. In the recording and broadcasting data transmission process, the plaintext is not fell to ensure the safety of the recording and broadcasting data in the transmission process and be not easy to be attacked by an intermediary.
Owner:SUZHOU KEDA TECH
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