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75results about How to "Quick withdrawal" patented technology

Low-altitude search radar system

The invention discloses a low-altitude search radar system. The low-altitude search radar system comprises antennas, an electronic cabin, a terminal display system, a driving mechanism, cables and a transmit-receive system installed in an antenna radio frequency cabin. The transmit-receive system comprises a receiver, a transmitter, a frequency synthesizer and a BIT detection system; the electronic cabin internally comprises a signal processing system, a power system and a servo control system, the antennas, the transmit-receive system and the driving mechanism are connected through machines, and the antenna radio frequency cabin and the driving mechanism, the electronic cabin and the driving mechanism as well as the electronic cabin and the terminal display system are connected through the cables. The radar system is small in size, low in power consumption, high in portability and flexible to arrange and has good detection performance for low-altitude and super-low-altitude objects, and the equipment is simple. The radar system can effectively search for and track the low-altitude and the super-low-altitude objects in an individual or multi-system networking mode and can be networked with photoelectric and wireless detection equipment to finish detection and early warning on the low-altitude and the super-low-altitude objects.
Owner:北京瑞达恩科技股份有限公司

Anode stripping solution for magnesium and magnesium alloy nickel-plating layer and method for stripping coating

The invention discloses an anode stripping solution for a magnesium and magnesium alloy nickel-plating layer and a method for stripping a coating. The stripping solution consists of the following components in percentage by volume: 5 to 10 percent of HF, 2 to 10 percent of fluoride, 5 to 15 percent of complexing agent, 0.1 to 0.5 percent of sodium dodecyl sulfate, and the balance of water. The method comprises the following steps of: preparing the stripping solution for the magnesium and magnesium alloy nickel-plating layer; and stripping the magnesium and magnesium alloy nickel-plating layer. During stripping, a magnesium alloy workpiece with an unqualified coating is used as an anode, and a cathode is a nickel-plating stainless steel plate. The method for stripping the magnesium and magnesium alloy nickel-plating layer by using the anode stripping solution for the magnesium and magnesium alloy nickel-plating layer can trip off the nickel-plating layer by one step at high speed without corrosion on the surface of a matrix; and after stripping, the matrix can be directly subject to electroplating or chemical plating once again. The hydrofluoric acid used in the stripping solution has low concentration, so the pollution to the environment and harm to bodies of operators are reduced.
Owner:UNIV OF SHANGHAI FOR SCI & TECH

Safety warning device used for elevator maintenance

The invention belongs to the technical field of elevator maintenance and particularly relates to a safety warning device used for elevator maintenance. Specific to the problems that when an elevator is maintained nowadays, a warning board needs to be placed at an elevator gate on each floor, and time and labor are wasted, the following scheme is put forwards. According to the scheme, the safety warning device comprises door frame concrete and a door pocket connected to the door frame concrete in a sleeving manner. An installation groove is formed in the right side of the door frame concrete, and a coiling block is connected in the installation groove in a clamping manner. A rotating shaft is rotationally connected in the coiling block. A cloth bag roll is connected to the position, close to the bottom end, of the outer wall of the circumference of the rotating shaft in a sleeving manner, and a warning belt is wound around the outer wall of the circumference of the cloth bag roll. A cloth clamping bar is fixed to the end, away from the cloth bag roll, of the warning belt, and a connecting pillar is fixed to the side, away from the warning belt, of the cloth clamping bar. By means ofthe safety warning device used for elevator maintenance, after the warning belt is dragged out, a clamping bar can be plugged into the bar-shaped hole incidentally, afterwards, rotation is conductedby 90 degrees, then the end portion of the warning belt can be fixed, and therefore the warning belt stretches across the part between the two inner walls of the door pocket to achieve a blocking effect.
Owner:KANGDA ELEVATOR CO LTD

Rapid disassembling and assembling structure for unmanned aerial vehicle vertical flat tail connection

The invention discloses a rapid disassembling and assembling structure for unmanned aerial vehicle vertical flat tail connection. The rapid disassembling and assembling structure for unmanned aerial vehicle vertical flat tail connection consists of a front connection rapid disassembling pin, a back connection rapid disassembling pin, a vertical tail front connection base, a vertical tail back connection base, a flat tail front connection base and a flat tail back connection base; the vertical tail front connection base and the vertical tail back connection base are fixedly connected with vertical tail assemblies correspondingly; and the vertical tail assemblies at the two ends are provided with the vertical tail front connection base and the vertical tail back connection base correspondingly. The flat tail front connection base and the flat tail back connection base are fixedly connected with a flat tail assembly respectively. The flat tail assembly is provided with two front connection bases and two back connection bases which are positioned at the two ends of the flat tail assembly correspondingly. When an unmanned aerial vehicle is unfolded, the flat tail assembly is placed between the vertical tails at the two ends, pin holes of the flat tail front connection base and the flat tail back connection base on the two end faces cooperate with pin holes of the vertical tail frontconnection base and the vertical tail back connection base of the vertical tail assemblies through movement of the flat tail assembly, the front connection rapid disassembling pin and the back connection rapid disassembling pin are inserted, and the mounting of the flat tail assembly is realized. When the unmanned aerial vehicle is retracted, the front connection rapid disassembling pin and the back connection rapid disassembling pin at the two ends are unplugged separately, and the separation of the flat tail assembly and the vertical tail assemblies is realized. The rapid disassembling andassembling structure is simple to maintain and convenient to operate.
Owner:NORTHWESTERN POLYTECHNICAL UNIV +1

Process for local electroplating of internal threads of nut

Provided is a process for local electroplating of internal threads of a nut. The workpiece nut is completely electroplated, and then protection, abrasive blasting, shot blasting, disassembly and aftertreatment are carried out. The process comprises the steps of pretreatment of the workpiece nut, electroplating, tool protection of the internal threads, abrasive blasting for removing plating layers on the outer surface, shot blasting for improving the surface smoothness of the part, disassembly, and aftertreatment. A protection tool is made of a nylon material and is in close fit through threads, and the two ends for tool protection are tightened in the protection process so that the protection tool can be prevented from falling and damaging plating layers of the internal threads in the abrasive blasting and shot blasting processes; the batches of plating layers can be rapidly removed through abrasive blasting, and the glossiness of the surface of the part can be improved and the roughness of the surface of the part can be reduced through shot blasting. The process is easy and convenient to implement, high in efficiency, free of plating missing, discoloration, corrosion and plating layer unevenness, low in cost, small in pollution, capable of achieving the qualified rate higher than 99% and high in universality, and can be applied to local electroplating of internal thread or external thread fasteners.
Owner:GUIZHOU HANGRUI AVIATION PRECISION PARTS MFG

Vehicle-mounted foldable hydraulic suspension arm device

The invention discloses a vehicle-mounted foldable hydraulic suspension arm device. The vehicle-mounted foldable hydraulic suspension arm device comprises a scissors fork foldable suspension arm and a hydraulic oil cylinder for driving the scissors fork foldable suspension arm to extend and retract, wherein the scissors fork foldable suspension arm is a diamond-shaped string telescopic frame formed by hinging a plurality of pairs of crossed hinged connecting rods in sequence; in a pair of crossed hinged connecting rods on the tail of the telescopic frame, a first mounting base movably connected with the connecting rods is arranged at the lower end of one connecting rod, and the lower end of the other connecting rod is arranged in a limiting guide groove of a suspension arm guide device; the front end of a piston rod of the hydraulic oil cylinder is directly or indirectly connected with the pair of connecting rods on the tail of the telescopic frame. By adopting the vehicle-mounted foldable hydraulic suspension arm device, the defect of influence on road traffic caused by a conveying pipeline during conveying of liquid goods through a vehicle in the prior art is overcome, and influence on the pass of other vehicles is lowered by hanging the conveying pipeline; the vehicle-mounted foldable hydraulic suspension arm device has the advantages of maneuverability, rapidness in unfolding and folding, and working stability.
Owner:XINXING HEAVY IND HUBEI 3611 MECHANICAL

High-maneuverability anti-overturning vehicle-mounted platform system

The invention discloses a high-maneuverability anti-overturning vehicle-mounted platform system which comprises a vehicle-mounted platform, four main legs fixedly arranged on the left side and the right side of the vehicle-mounted platform and four movable supporting legs arranged on the front side and the rear side of the vehicle-mounted platform, and the four main legs are used for keeping the vehicle-mounted platform in a horizontal state through a four-point automatic leveling algorithm. The four movable supporting legs are used for expanding the supporting range of the vehicle-mounted platform, each movable supporting leg comprises a supporting arm hinged to the vehicle-mounted platform, an auxiliary leg fixedly arranged at the tail end of the supporting arm and a self-locking oil cylinder for driving the supporting arm to be unfolded and locking the position of the supporting arm at the unfolding position, and the four auxiliary legs are used for anti-overturning supporting of the vehicle-mounted platform. When the vehicle-mounted platform system is erected, the supporting arms are unfolded at the same time when the main legs are leveled, the erecting time is saved, quick erecting and retracting are achieved, meanwhile, the anti-overturning capacity of the vehicle-mounted platform is improved, and the vehicle-mounted platform system is particularly suitable for erecting alarge planar array antenna with the height larger than 18 m.
Owner:ANHUI BOWEI CHANGAN ELECTRONICS

Special military staple food catering truck for defense-related science and technology research by teenagers

A special military staple food catering truck for defense-related science and technology research by teenagers comprises a truck base platform, a truck chassis, foldable left and right truck boards, a truck roof, a secondary driver chamber, a primary driver chamber, left and right main wheels, left and right front wheels, left and right middle wheels, left and right rear wheels, a right water supply tank chamber, left and right passages, a fuel gas supply tank chamber, left and right oil and rice subsidiary foodstuff storage chamber, a left water supply tank chamber, left and right No.1 kitchen, left and right No.2 kitchens, left and right No.3 kitchens, left and right No.4 kitchens, left and right No.4 kitchens, left and right No. 5 kitchens, left and right No.6 kitchens, left and right No.7 kitchens, left and right No.8 kitchens, left and right No.9 kitchens, a vegetable storage chamber, a flue gas exhaust pipe, left and right rectangular chopping board, left and right rings, left and right conversion wheels and left and right hooks. The special military staple food catering truck can supply food for all commanders and fighters of a whole regiment of a field troop once, can meet requirements of the army in peaceful and war periods, the protection performance reaches the international advanced level, and the special military staple food catering truck has good performance.
Owner:FOSHAN SANSHUI DISTRICT XIWANG HUOJU EDUCATIONAL TECH CO LTD

Rapid folding and unfolding device of antenna bracket and rapid folding and unfolding method of rapid folding and unfolding device

The invention relates to a rapid folding and unfolding device of an antenna bracket. End parts of four connector pipes of a triangular bracket are engaged and equipped with thread connectors with external threads; the upper end of the vertical and upward connector pipe is coaxially connected with the lower end of one vertical fixing rod through a thread connector; the upper end of the fixing rod is fixedly equipped with an inward concave connector; an outward convex connector is matched and embedded on the upper part of the inward concave connector; a foldable rod is fixedly mounted at the upper end of the outward convex connector; a hand pulling ring is mounted at the upper end of the foldable rod; the hand pulling ring is connected with one end of a rubber band; the other end of the rubber band sequentially penetrates through the foldable rod and the fixing rod to be connected into the triangular bracket; and another three connector pipes of the triangular bracket are also equipped with foldable rods with the same length through thread connectors in an embedding manner and the foldable rods are used as supporting legs. According to the rapid folding and unfolding device of the antenna bracket, an antenna can be rapidly erected and folded and the maneuvering characteristics are greatly improved; and guarantees are provided for good working states of the antenna.
Owner:天津全华时代航天科技发展有限公司

Ducted multi-rotor tethered UAV and its control system

The invention relates to a duct type multi-rotor tethered drone and a control system thereof, belongs to the field of drones, and aims to solve the problems that existing drones are short in flight duration and prone to crash due to the fact that the rotors of the drones are exposed. The duct type multi-rotor tethered drone is characterized in that the an inner central pipe is connected with an outer duct pipe through a group of guide vanes, a group of carbon fiber pipes is fixedly mounted on the outer wall of the lateral side of a block formed by central plates, the middle section of each carbon fiber pipe is fixed with the wall of the duct pipe, and an auxiliary rotor is mounted at the tail end of each carbon fiber pipe through an auxiliary motor; a hardware control system is mounted onthe upper surface of the central plate block, a main motor is coaxially mounted on the lower surface of the central plate block, the main motor drives a main rotor, and a power supply system is arranged beside the main motor; the hardware control system is connected with the main motor, a group of auxiliary motors, the power supply system, a video collecting unit and an automatic pilot, and a tether is connected with the hardware control system, the main motor, the group of auxiliary motors and the video collecting unit through the power supply system. The duct type multi-rotor tethered dronecan constantly work around the clock.
Owner:HARBIN INST OF TECH

Novel liquid filling device

The invention relates to a novel liquid filling device. The novel liquid filling device comprises a liquid storage container and an extrusion container internally provided with a piston, the piston divides an inner cavity of the extrusion container into a liquid injection cavity and an extrusion cavity, the liquid injection cavity is used for communicating with the liquid storage container, the extrusion cavity is used for allowing an extrusion power medium to enter to exert pressure on the piston so as to extrude a liquid within the liquid injection cavity, the piston is assembled in the extrusion container in a sliding sealing mode, a liquid injection pipeline is connected to the liquid injection cavity, and a liquid injection vacuumizing pipeline is used for vacuumizing the liquid injection pipeline, the liquid injection cavity and a cavity to be injected with the liquid. The novel liquid filling device is provided with the extrusion container, the liquid can be injected into the extrusion container through the liquid storage container, the piston is arranged in the extrusion container, the piston is pressed to extrude the liquid injection cavity, so that the condition that airis dissolved in the liquid due to the air directly extrudes the liquid is avoided, and the technical problem that during filling of an existing liquid filling device, air is prone to mix, and much mixed air is caused is solved.
Owner:HENAN AEROSPACE HYDRAULIC & PNEUMATIC TECH
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