132results about How to "Full protection" patented technology

The invention relates to a method for cooperatively and optimally allocating the water volume in a non-flood season, which comprises the following steps of: firstly, obtaining the information of water consumption and water return of each aspect under the overall consideration including the aspects of ecology, livelihood, industry, agriculture, and the like of a river basin; secondly, determining and controlling the minimum water demand of a section by calculating the runoff of a river course, the water demand outside the river course and the lowest water demand in the river course; monitoring the water volume of the river course of the river basin at real time, and automatically outputting water shortage prewarning degrees when the flowrate of the control section is lower than the minimum water demand flowrate; and finally, dynamically and integrally adjusting and controlling groups of reservoirs through cooperative particle swarm intelligent optimization algorithms under different prewarning degrees, so as to achieve the functions of unified water allocation. The method thoroughly takes the water consumption of the ecology, the livelihood, the industry and the agriculture into consideration, and ensures the balanced water consumption of water-consuming aspects in the river basin according to the principle of firstly ensuring the livelihood and then meeting the requirements of the agriculture and the industry.

The invention provides a comprehensive detection method for high resistance ground faults of an electric power system and belongs to the field of emergency protective circuit devices. The detection method comprises two parts of utilizing a transient state direction to recognize faulty lines and utilizing intermittent detection to detect intermittent faults; fault component current and voltage are calculated based on voltage and current waveforms before fault startup and a fault direction is obtained by utilizing the fault component voltage and current waveforms to calculate transient idle work; with regard to forward pulse counting, a pulse count is compared with a pre-set threshold value to judge a fault when detection time is cut off so as to more sensitively detect intermittent high resistance ground faults and cut off the fault lines in time; and furthermore, the sensitivity of a power supplying line protective device is improved so as to be good for improving the continuous and stable operation of a whole middle-voltage power distribution system and ensure the safety performance of a whole power supply system. The comprehensive detection method can be widely applied to the fields of high resistance ground fault detection and relay protection of the middle-voltage power distribution system with an effectively-grounded neutral point.

The invention relates to a method for detecting an intermittent high-resistance grounding fault through intermittent detection and belongs to the field of emergency protection circuit devices. The method comprises the steps that detected forward fault pulses of intermittent power counted within a preset time window and the result of pulse counting is compared with a preset counting threshold when the timing is ended; if a counted value exceeds the preset counting threshold, a fierce transient state is deemed to occur within short time and a relay protection system gives out an alarm of the detected grounding fault as the intermittent high-resistance fault. The method for detecting the intermittent high-resistance grounding fault through intermittent detection has the advantages that the intermittent high-resistance grounding fault can be detected more sensitively, the faulted line can be removed, the sensitivity of a power supply line protection device is improved, the protection effect of the existing relay protection system/device is fully exerted, the continuous and stable operation of the entire medium-voltage power distribution system is improved and the safety performance of the entire power supply system is guaranteed. The method can be widely used in the field of high-resistance grounding fault detection and the relay protection of the medium-voltage power distribution system with a neutral point which is effectively grounded.

The invention belongs to the technical field of the underground coal mine fully-mechanized excavating face temporary support. In order to solve the above problem existing in the current underground coal mine temporary support, the invention provides arch tunnel drivage non-repeated-support self-moving complete equipment. The arch tunnel drivage non-repeated-support self-moving complete equipment comprises a heading machine, a support lifting platform and a plurality of external support devices. The external support devices use an arch support matched with an arch drivage tunnel. The external support devices are mutually parallel, and are installed across the heading machine to form the support to the arch drivage tunnel. The support lifting platform is installed at the top of the heading machine and can be freely ascended and descended to contact with the upper part of the external support devices. The external support devices can be forwards pushed to the front end of the heading machine along a travel line of tunneling along with the support lifting platform after contacting with the support lifting platform. The arch tunnel drivage non-repeated-support self-moving complete equipment is capable of creating reliable and flexible support conditions for the safe and high-efficient mining of a driving working face, realizing the non-repeated-support to a top board, and guaranteeing the integrity of the top board, and has the important significance of completing a mechanical mining technology of the tunneling face, and improving the tunneling speed and production efficiency.

The invention discloses an electrical cabinet wire duct which comprises a U-shaped wire duct body. The electrical cabinet wire duct is characterized in that a sliding pressure plate is arranged in the wore duct body, a plurality of pull rods are connected to the bottom of the pressure plate, a locking block is connected to one side of the wire duct body and provided with through holes which correspond to the pull rods and allow the pull rods to pass through, the through holes penetrate through the wire duct body, the pull rods slide in the wire duct and the through holes of the locking block, and a protecting soft plate of a U shape is arranged between the pressure plate and the inner side wall of the wire duct body. In the wiring process, a wire is distributed on the protecting soft plate of the U shape, and when the wire is pressed, the pull rods are fixed through the locking block after being tensioned. A claw groove is formed in the end of each pull rod. A handle for pulling the corresponding pull rod is arranged at the end of each pull rod. The pressure plate can be utilized for pressing and fixing the wire in the wire duct, the wire duct can be used repeatedly, the waste of wire ties is avoided, and then waste of time for threading the wire ties is avoided.

The invention relates to the field of solar cells, and discloses a molybdenum disulfide quantum dot-modified graphene-zinc oxide nanotube array sensing material preparation method. A zinc oxide nanotube array is firstly prepared on conductive glass; carboxylic graphene oxide and zinc oxide are bonded together in a chemical bond mode through a silane coupling agent of aminopropyltrimethoxysilane; through spin coating of PDMS, molybdenum disulfide quantum dots are absorbed, and a flexible quantum dot-modified graphene/zinc oxide nanotube array sensing material is obtained. The sensor has an important development prospect in aspects such as environment monitoring and chemical gas detection.

The invention relates to the field of radio frequency repeater devices, in particular to a protective shell of a radio frequency repeater device with a heat dissipation assembly, which comprises a base, a shell, a heat dissipation structure, an ash removal structure, a moving structure, a limiting structure, a protective structure and a fixed structure, through arrangement of the heat dissipationstructure, heat dissipation work can be fully carried out on electrical elements in the shell, electrical elements in the shell can be prevented from being damaged due to over-high temperature, whilethe heat dissipation structure works, the ash removal structure can be synchronously driven to work, the ash removal structure works, dust cleaning work can be carried out on the heat dissipation structure, the heat dissipation structure is prevented from being blocked by dust, through the arrangement of the moving structure, the moving assembly can be conveniently stretched out and stored, the moving structure can react to the fixing structure while working, through the arrangement of the fixing structure, the base and the ground can be stably fixed, and therefore the situation that the device slides in the working process can be avoided.

The invention relates to an overvoltage protection method and overvoltage protection devices of modular multi-level converters. The overvoltage protection method comprises the following steps of arranging the overvoltage protection devices of the modular multi-level converters between alternating current ends of the modular multi-level converters and the ground, or between direct current ends and the ground, or between the alternating current ends, or between the direct current ends or more than one of the positions at the same time, setting operation voltage parameters of lightning arresters, setting operation voltages of discharging circuits and setting delay operation time of the discharging circuits, wherein each overvoltage protection device comprises the discharging circuit, a voltage-sharing damping circuit and the lightning arrester, the operation voltage parameters of the lightning arresters comprise reference voltages, operation overvoltage protection levels, lightning overvoltage protection levels and steep wave overvoltage protection levels, and the operation voltages of the discharging circuits are set according to expected invasion power frequency overvoltage levels. By means of the overvoltage protection method and the overvoltage protection devices of the modular multi-level converters, economical efficiency and reliability of the modular multi-level converters are improved.

The invention discloses a direct-current remote feeding power system, which comprises a local module, a remote module, communication equipment and a local control module, wherein the local control module consists of an input over-voltage/under-voltage protection functional circuit and an output over-voltage and strong-current invasion protection functional circuit; the input over-voltage/under-voltage protection functional circuit detects an input voltage and drives the whole circuit for input over-voltage/under-voltage protection; the output over-voltage and strong-current invasion protection functional circuit limits an output voltage of a local power supply to be equal to or less than direct current (DC) 400 V; and when the output voltage is more than 400 V, a voltage-stabilizing tube is switched on reversely to drive the circuit to operate for over-voltage protection. The direct-current remote feeding power system has the advantages that: the power-off time of the communication equipment is shortened; construction cost, operation cost and maintenance cost are reduced; installation and construction are facilitated; safety for power utilization is improved; and the service life of the communication equipment is prolonged. The direct-current remote feeding power system is widely applicable to construction of mobile base stations, Ethernet passive optical networks (EPCN), indoor or outdoor computer rooms and the like.

The invention belongs to the field of new energy automobile related equipment. The invention relates to a charging pile, in particular to a rainproof self-cleaning charging pile. Bottom plate, a pilebody of the charging pile is fixedly installed at the upper end of the bottom plate. The upper end of the pile body is fixedly connected with a water storage box; a wedge block is arranged in the water storage box; a protection mechanism is arranged on the lower side of the water storage box; the protection mechanism comprises a communication box with openings in the upper end and the lower end. The communicating box is fixedly connected to the lower end of the water storage box; a connecting pipe is arranged at the lower end of the communicating box corresponding to the communicating box; pressure valves are arranged in the connecting pipes, the side wall of the pile body is rotationally connected with a rotating rod, the rotating rod is fixedly sleeved with a plurality of fan blades, openings are formed in the positions, corresponding to the fan blades, of the communicating box, the fan blades extend into the communicating box, a threaded rod is rotationally connected between the bottom plate and the water storage box, the threaded rod and the rotating rod are fixedly sleeved with helical gears, and the two helical gears are in engaged connection. By arranging the protection mechanism, self-protection can be conducted during rainfall, and the situation that the working state of the charging pile is affected by rainwater invasion is prevented.

The invention relates to a method for controlling a locomotive traction converter, and specifically relates to a method and a device for controlling a four-quadrant rectifier of the locomotive traction converter. The problem that the four-quadrant rectifier of an existing locomotive traction converter is low in control precision and large in calculated quantity is solved. The control method is realized through the following steps: (1) collecting the power grid side voltage, current and direct-current bus voltage of the locomotive traction converter; (2) obtaining the phase position and amplitude of the power grid side voltage; (3) setting bus command voltage, and after comparing the bus command voltage with the collected direct-current bus voltage, feeding the bus command voltage into a PIcontroller; (4) multiplying the output of the PI controller with the phase position of the power grid side voltage to obtain command current; (5) after comparing the command current with the collected power grid side current, entering into an PR controller; and (6) after comparing the output of the PR controller with the amplitude of the power grid side voltage, feeding the output of the PR controller into a pulse modulation module. The response speed and control precision of the system are greatly improved, and the data calculated quantity is reduced.

The invention relates to an ultrasound sensor device for detecting and sending ultrasound. To improve the sensitivity of an ultrasound sensor device 1 used for detecting an object, the ultrasound sensor device 1 has a multiplicity of transmission sensor elements (3a-3f). Each ultrasound sensor element 3a, b comprises a basic body or substrate 4 with an opening 5a, b, a flexible bending element 6a, b, which closes a first end A of the opening 5a, b. The flexible bending element 6a, b may be a polymer, particularly a liquid crystal polymer, but metals or metal oxides are also proposed. The piezoelectric element 7a, b, is arranged in the opening 5a, b in contact with the flexible bending element 6a, b and a damping element 8a, b which is arranged in the opening 5a, b closes a second end B of the opening 5a, b.

The invention relates to a lubricating oil additive as well as a preparation method and an application thereof. Benzoic acid, diethylenetriamine and hexafluoropropylene are used as main raw materials to synthetize the lubricating oil additive containing an imidazoline type molecule similar structure. The lubricating oil additive disclosed by the invention can be completely dissolved in fluorin-contained lubricating oil, so that the anti-corrosion performance of the fluorin-contained lubricating oil can be substantially improved, the fluorin-contained lubricating oil has good stability and is used for a long time, and the rust-free operation effect is guaranteed so as to fully protect the metal parts of relevant equipment. The lubricating oil additive has the advantages of simple preparation method and low economic cost, the performance of the fluorin-contained lubricating oil is effectively improved, the operation effect of the relevant equipment is substantially improved, the service life of the relevant equipment is substantially prolonged, and the lubricating oil additive is suitable to popularize and apply in the relevant lubricating oil.

The invention discloses a surgical wound debridement suture protective device, and belongs to the technical field of medical equipment. The surgical wound debridement suture protective device has thetechnical features that the surgical wound debridement suture protective device includes a supporting mechanism, a disinfection mechanism, a driving mechanism and a protective assembly, wherein the supporting mechanism includes a base, a supporting plate, a vertical rod and a mobile workbench, the mobile workbench is arranged on the upper part of the base, the base and the mobile workbench are slidably connected, the vertical rod is fixedly installed on the upper surface of the mobile workbench, a horizontal cross rod is fixedly installed at the top of the vertical rod, the protective assemblyis arranged on the lower part of the horizontal cross rod, the protective assembly is slidably connected with the horizontal cross rod, and disinfection mechanism is arranged on the upper surface ofthe mobile workbench. The embodiment of the surgical wound debridement suture protective device has the advantages of quick debridement and pollution-free, and the arrangement of the protective assembly can realize the full protection of medical personnel, and the angle of an arc-shaped prevention plate is adjustable, the protective effect of the protective assembly is further ensured, the infection of the medical personnel is avoided, and the life safety of the medical personnel is ensured.

The invention belongs to the field of pesticides, and relates to an agricultural composition, in particular to an agricultural composition containing zinc thiazole and phenamacril, and a preparation and application thereof. The agricultural composition containing zinc thiazole and phenamacril contains an effective component A and an effective component B; the effective component A is zinc thiazole; the effective component B is phenamacril; and the agricultural composition further contains an effective component C selected from any one of thiamethoxam, dinotefuran, tebuconazole and hymexazol. A dosage form prepared from the agricultural composition is capable of effectively delaying resistance and can be used for preventing and treating pathogenic bacteria, oomycete and fungal diseases of crops; the agricultural composition containing thiamethoxam or dinotefuran can also be used for preventing and treating diseases and insect pests simultaneously; and the agricultural composition disclosed by the invention is mainly used for processing crop seeds and soil, and has the advantages of being high in efficiency, low in toxicity and residual, good in environmental compatibility and low in cost.

The invention discloses a communication tower capable of climbing safely and a using method. The communication tower comprises a tower body, a safety frame, a sliding sleeve, a communication structureand a bird repelling structure, equidistant mounting frames are welded to the center of the front face of the tower body, triangular fixing blocks are welded between the two sides of the bottoms of the mounting frames and the tower body, and pedals are fixedly mounted at the tops of the mounting frames. The communication tower is provided with the bird repelling structure, under the action of wind power, the bird repelling structure can automatically rotate, then a reflector in the bird repelling structure reflects light, birds can be repelled through the phototaxis of the birds, a wind whistle on the bird repelling structure can make a sound under the action of the wind power to repel birds, therefore, the birds can be fully expelled under the cooperation of the two parts, the birds areprevented from staying at the top of the tower body, a communication structure at the top of the tower body can be effectively protected, people do not need to climb the tower body to maintain and replace the communication structure, and thus excessive cost does not need to be consumed.

The invention discloses an infrared axle temperature detection system modulation type probe infrared radiation modulation device comprising a modulation driving board, a brushless DC motor and a radiation modulation disc. The modulation driving board comprises a power supply module, a control module, a power inversion module, a circuit protection module, a position signal processing module and a modulation signal processing module. When a wheel sensor in the train coming direction of the rail side detects passing of a train, the wheel sensor transmits a train passing signal to a control machine, and the control machine detects the signal and then transmits a modulation signal to an infrared probe. The modulation driving board receives the modulation signal and then drives the brushless DC motor to stably operate at the designated rotating speed in a high-speed way so as to drive the radiation modulation disc to rotate at the designated speed to modulate axle temperature infrared radiation of the train into radiation flux of which the amplitude continuously changes along with time. Advantages of the infrared axle temperature detection system modulation type probe infrared radiation modulation device are that the device is based on the principle of digital pulse width modulation and is high in precision, high in regulation speed, high in anti-noise performance, low in cost, low in power consumption, flexible to control and great in dynamic response.

The invention relates to automatic packaging equipment for a lithium battery cell. The device comprises an operation table, a feeding conveying device is arranged on the left side of the operation table, a positioning assembly is arranged on the right side of the feeding conveying device, a battery conveying device is arranged on the right side of the positioning assembly, a plurality of containing positions are arranged on the upper portion of the battery conveying device at equal intervals, and a protective clamp disc is arranged on each containing position. A first sealing cover taking andplacing mechanical arm, a first side face rubberizing device, a second side face rubberizing device, a first tail rubberizing device, a second tail rubberizing device, a fifth sealing cover taking andplacing mechanical arm and a battery discharging mechanical arm are sequentially arranged on the portion, located on one side of the battery conveying device, of the operation table in the battery conveying direction. The lithium battery is fully protected through the silica gel foam and the battery cell shell in the sealing cover, vibration in the conveying process is avoided, and the stabilityof the lithium battery in the conveying process is guaranteed. The full-mechanical operation is realized, the structure is compact, the packaging quality and efficiency of the lithium battery are improved, and the market application value is high.

The invention provides an existing line protective shed which mainly comprises three parts, namely a foundation, vertical columns and a ceiling, wherein the foundation and the vertical columns, and the vertical columns and the ceiling are all connected through threaded fixing devices. The protective shed has a simple structure and facilitates the mounting and the dismounting, and the ceiling is composed of a plurality of hoisting units. By adopting the structure provided by the invention, the construction speed is accelerated, and the wind resisting and seismic effect is good; and a plurality of ventilation holes are formed in the ceiling, so as to realize ventilation and prevent object from falling within the line range.

The invention mainly relates to the field of storage of agriculture products, and discloses a storage method of broad beans. The storage method comprises the following steps of performing picking, performing drying, and performing storage. The method is simple, batched treatment and storage can be performed, and after the broad beans are stored for one year, the color change rate of the broad beans is reduced to 1% or below, and the color and the nutrients of the broad beans can be maintained. The sprouting rate is 97.3%, the planting cost is saved, and the economic returns are increased by 11.6%. After the broad beans are picked, the broad beans and broad bean pods are picked together, so that the protection effect of the broad bean pods is sufficiently achieved. After the broad beans are picked, the broad bean pods are continuously and repeatedly sprayed with a vitamin C solution, so that the antioxidation of the broad bean pods is increased, and the scratchability of the broad bean pods is improved. The broad bean pods are placed in an antibacterial agent for short-time soaking, so that the humidity of the broad bean pods is improved, the antibacterial agent contains various components which are safe, non-toxic, green and healthy, a protective film can be formed on the surface of each of the broad bean pods, and the scratchability of the broad bean pod is improved. The effects of resisting and restraining bacteria, preventing mould, killing pests, maintaining the storage integrity of the broad bean pods, and preventing the broad beans from changing color, becoming mildewed, or being rotten due to insect bites are achieved.