82results about How to "Increase safety redundancy" patented technology

The invention discloses a passive residual heat removal system of a marine nuclear power device. The passive residual heat removal system comprises a containment and a cooling heat exchanger. The containment is internally provided with a reactor pressure vessel, a loop cool pipe section, a loop heat pipe section, a steam generator, a refueling water tank, a 1# residual heat removal heat exchanger, a 2# residual heat removal heat exchanger and a cooling water pipe bundle; the refueling water tank is arranged at the top of the containment; the reactor pressure vessel and the steam generator are connected with the heat pipe section through the loop cool pipe section; the inlet and the outlet of the 1# residual heat removal heat exchanger are respectively connected with the loop heat pipe section and the loop cool pipe section; a main steam pipeline and a water supply pipeline which are connected with the inlet and the outlet of the 2# residual heat removal heat exchanger are arranged on the steam generator; upper and lower ends of the cooling water pipe bundle are respectively connected with the inlet and the outlet of the cooling heat exchanger. The passive residual heat removal system of the marine nuclear power device is independent from external power, is improved in capability of removing residual heat of reactor core through natural circulation, is improved in safety redundancy, power and operation stability, and guarantees operation safety of nuclear reactor.

The invention discloses a fabricated steel structure beam-column connection joint and a connection method thereof. The fabricated steel structure beam-column connection joint is used for solving the problem that an existing joint is poor in anti-seismic performance and for connection of a steel beam and a steel column. The end of the steel beam is a connection part, and a set of plate-shaped spring assemblies is arranged in each of mounting grooves on the two sides of the steel beam. A concrete block formed by grouting is arranged in a grouting space between a grouting trough and the inner wall of a rectangular steel pipe. A transition connection part is composed of a steel plate and the rectangular steep pipe, wherein the steel plate is fixed to the steel beam through a high-strength bolt, a plug-in part is formed in the rectangular steel pipe, and the connection part is inserted into the plug-in part to form partial overlapping. Anchor pulling holes are formed in the plate-shaped spring assemblies, a separation plate and the steel column, after a steel cable penetrates through the anchor pulling holes, the two ends of the steel cable are fixed to the steel column and the steel beam correspondingly. Under a non-seismic state, the joint is rigid connection, under a seismic state, movable flexible connection is formed, and thus the problem of fragile fracturing brought by the rigid joint can be avoided.

The invention relates to a metro inter-zone flood-preventing protective air-tight gate opened and closed in a swing mode. A hinge pin is installed on a support on the gate. A swing hydraulic cylinder is installed on a machine rack. A push rod is provided with a clamping groove in the length direction. The hinge pin is connected in the clamping groove in a sliding mode. One end of the push rod is connected with a rotary shaft of the swing hydraulic cylinder. A supporting device further comprises an upper oblique plate, a lower oblique plate, a bolt, a base and a screw. The base is fixed on the ground under a wheel when a gate leaf is completely opened. The wheel is matched with the top of the upper oblique plate. The upper oblique plate is vertically and movably installed in the base and provided with an upper oblique plane. The lower oblique plate is horizontally and movably installed in the base and provided with a lower oblique plane. The upper oblique plane makes contact with the lower oblique plane. The lower oblique plane is in threaded connection with the screw. The bolt is installed on the base and matched with the upper oblique plate. The metro inter-zone flood-preventing protective air-tight gate opened and closed in the swing mode is simple in structure, small in occupied space and convenient to install and maintain and can be operated and controlled in manual and electric modes.

The invention provides a double engine-driven closed hydraulic system of a main actuating mechanism of a caterpillar crane, which comprises a first engine, a second engine, a first closed pump set, a second closed pump set, a plurality of switching valves an a plurality of main execution mechanisms, wherein the first engine and the second engine are respectively connected to the first closed pump set and the second closed pump set, the plurality of switching valves are respectively connected to the first closed pump set or the second closed pump set, and the plurality of main execution mechanisms are connected to the plurality of switching valves. By adopting two engines with smaller power to replace a single engine with larger power and two same closed pump sets, the double engine-driven closed hydraulic system of the main actuating mechanism of the caterpillar crane realizes the execution mechanism with larger hoisting capacity is driven by the engine with smaller power and pumps with smaller delivery capacity. Meanwhile, by using the switching valve sets, all the execution mechanisms can be driven by using the single engine.

The large multipoint hydraulically driven winch includes a pedestal, side racks, crossbeams, a dual reel, an end large gear, a steel cable and hydraulic reversing gears. Two side racks are connected with two crossbeams to form one integral frame structure; six hydraulic reversing gears comprising hydraulic motor, brake, planetary speed reducer and small gear each are mounted separately onto two side racks; the small gears in three hydraulic reversing gears on the same side rack are arranged in the form of an equilateral triangle and meshed with the large gear to form one opened gear transmission system; and the hydraulic motors convert the hydraulic power into mechanical rotating power transmitted through the small gears to the large gear. The multipoint driving system has equal driving forces to the reel in different points, optimal hydraulic driving characteristic and other advantages.

The invention discloses a mechanical pump set assembling method for molten steel degassing. The method involves a mechanical pump set which comprises at least one pump set, wherein each pump set is connected in parallel with an inlet gas collecting pipe in a communication manner and then communicates with a gas pumping port of a molten steel degassing device to be vacuumized; a gas outlet of eachpump set is connected in parallel with an outlet gas collecting pipe in a communication manner and then is connected to atmosphere; each pump set comprises at least one first-stage pump, a second-stage pump, a third-stage pump and a backing pump; each backing pump is a large screw pump or an efficient two-stage water ring vacuum pump; pump machines, at the same grade, of each main pump, each second-stage pump, each third-stage pump and each fourth-stage pump are mounted in a parallel connection manner; inlet gas of the pump at each grade is uniformly distributed to each pump machine through the inlet gas collecting pipe; the gas outlet of the pump set unit at each grade is collected through a gas outlet pipe and then enters the pump machine at next grade to be compressed; the gas outlet ofeach backing pump communicates with the outlet gas collecting pipe in a parallel connection manner; the outlet gas collecting pipe communicates with the atmosphere. The invention also discloses a mechanical pump set system constructed by the abovementioned method. The mechanical pump set system is high in redundancy of gas pumping capacity; and the production safety is high.

The invention discloses an energy dissipation body structure of an elevated single-column station. The energy dissipation body structure comprises energy dissipation pier studs, a bottom layer anti-buckling supporting frame, in-axillary additional anti-buckling supporting cantilever transfer girders and a two-layer shearing coupling beam eccentric supporting frame which are all used for providingadditional rigidity when the earthquake magnitude is smaller than or equal to the preset earthquake magnitude and enter a yield state from an elastic state to plastically deform so as to consume partof input energy of an earthquake independently or in freedom cooperation with one another when the earthquake magnitude is larger than the preset earthquake magnitude. The energy dissipation body structure is suitable for the elevated single-column station; for the same type of irregular structure, some energy dissipation sub-structure in the energy dissipation body structure can also be adopted in the similar anti-seismic weak link, and therefore the anti-seismic performance and after-disaster restorability of the energy dissipation body structure are improved, and the energy dissipation bodystructure has good popularization prospects.

The invention provides an airport passenger checked baggage security inspection device and a using method thereof. The device comprises preliminary-screening security inspection machines which are installed at check-in counters in an airport departure lounge and are of low investment cost. The rear ends of the check-in counters are connected with a circular checked baggage collection conveyor. A precise-detection security inspection machine is installed on the upper part of the checked baggage collection conveyor. The end of the checked baggage collection conveyor has a baggage opening area. A branching device is arranged on the checked baggage collection conveyor in the baggage opening area. With the device adopted, the overall operating efficiency of airports can be improved, convenience is brought to passengers, security check and check-in personnel can perform operation easily, and the costs of security check, the baggage system and related processes are reduced. Checked baggage can be opened for inspection in the presence of passengers under the condition that security inspection technology and conditions are satisfied. Response of different security levels can be made, and problematic checked baggage can be dealt with earlier. The labor intensity of related staff in airports can be reduced, and the work efficiency can be improved. The quality and level of airport service can be improved. Manpower and material resources can be saved, and energy saving and consumption reducing can be achieved.

The invention provides a steel keel connecting piece. The steel keel connecting piece is characterized by comprising a first part and a second part which are movably connected. The steel keel connecting piece is firm in fixing and convenient to install, and preferably, different materials are adopted for meeting the requirements of strength of different parts, so that cost is lowered while fastened installation is ensured; and by adjusting the shape of an installing hole, certain impact buffer can be obtained, and high safety redundancy is achieved.

The invention discloses a connection device and a connection method for preventing a steel structure column foot from being tensioned. The connection device comprises a prestressing pull bar pair, a combined node plate and an embedded casing. The prestressing pull bar pair formed by integrally connecting an upper section of a steel pull bar with a lower section of the steel pull bar through a forward and reverse buckle casing, and two ends of the steel pull bar are provided with threads; the lower section of the steel pull bar of the prestressing pull bar pair penetrates the embedded casing embedded in a tension side of a concrete foundation in advance to be connected with a nut; the upper section of the steel pull bar of the prestressing pull bar pair penetrates a hole formed in the combined node plate welded to the tension side of a steel column in advance to be connected with the nut; the upper and lower sections of the steel pull bar exert prestress upon the steel pull bar through the forward and reverse buckle casing. Therefore, the steel column foot can be prevented from being tensioned, using amount of sill anchors can be reduced, and connection rigidity of the steel column foot can be improved.

The invention provides a ship lift lifting type double-steel-beam anti-collision system which comprises a double-blocking anti-steel-beam assembly, a supporting component assembly, a lifting driving device, a reversing device, a lifting connecting assembly and a supporting structure. The lifting driving device is arranged in the ship chamber main longitudinal beam structure on the side edge of theship reception chamber structure, the lifting driving device is connected with the double-blocking steel beam assembly through the reversing device and the lifting connecting assembly, and the double-blocking steel beam assembly can be driven by the lifting driving device to move up and down; the double-blocking steel beam assembly comprises an impact beam, a safety beam and a middle connecting device, the impact beam and the safety beam are fixedly connected through the middle connecting device, and the supporting structure is fixed to a ship chamber structure on the inner side of the safetybeam. Large safety redundancy is achieved, the collision force between the ship and the plastic beam is effectively reduced, and the adverse effect of the collision load of the ship colliding with the anti-collision beams on the ship compartment structure is reduced; a detachable connecting structure is adopted between the two stages of anti-collision beams so that the collision beam damaged by collision is convenient to replace; the ship lift lifting type double-steel-beam anti-collision system can meet blocking requirements of ships with bulbous bows.

The invention discloses a portable emergency repair optical cable device which comprises optical cable vehicle wheels, an optical cable winding plate, an optical cable retracting control handle, a rotation speed control handle, a clutch device, an optical cable carrying rack and a retractable pull handle. The optical cable vehicle wheels are arranged at the bottom of a frame. The retractable pullhandle which can be lifted and lowered is arranged at the top of the frame. The optical cable carrying rack is arranged on one side of the frame. The optical cable winding plate is fixedly arranged onthe optical cable carrying rack. The optical cable winding plate comprises an active optical cable winding plate and an emergency repair optical cable winding main plate. The active optical cable winding plate is in sleeve joint with and provided with the emergency repair optical cable winding main plate. The optical cable retracting control handle, an optical cable reeling auxiliary plate andan end tensioning device are arranged on the outer side wall of the emergency repair optical cable winding main plate. The optical cable retracting control handle and the end tensioning device are located on both sides of the optical cable reeling auxiliary plate. The clutch device is arranged at the center of the active optical cable winding plate. The rotation speed control handle is arranged onthe clutch device. An emergency repair optical cable winding main cable is wound around the emergency repair optical cable winding main plate.

The invention discloses a plug pin type connection structure for prefabricated hollow uplift piles. The plug pin type connection structure comprises an upper hollow pile and a lower hollow pile; reserved plug pin holes A are formed in the connection ends of the upper hollow pile and the lower hollow pile; the upper hollow pile and the lower hollow pile are mutually connected through a solid connection rod; reserved plug pin holes B are formed in two ends of the solid connection rod; two ends of the solid connection rod are respectively inserted in the hollow ends of the upper hollow pile and the lower hollow pile; the two ends of the solid connection rod are respectively and fixedly connected with the upper hollow pile and the lower hollow pile by adoption of plug pins and fixed nuts; theplug pins pass through the reserved plug pin holes A and the reserved plug pin holes B; and two ends of the plug pins extend out from the reserved plug pin holes A and are fixed through the fixed nuts. The plug pin type connection structure is capable of greatly enhancing the shear and flexural capacity of the joint parts of the hollow piles. By adoption of the structure, the connection manner isconvenient in construction, direct in force transfer, clear in stress and controllable and reliable in quality.

The invention relates to the field of wastewater treatment and in particular relates to a disintegration tank with shock resistance. The disintegration tank comprises a regulating tank, a detecting tank and a plurality of disintegration tank bodies sequentially communicating by guide pipes; the detecting tank comprises a first detecting tank and a second detecting tank; the disintegration tank body located at the head end is provided with a water inlet pipe in a communicating way; the disintegration tank body located at the tail end separately communicates with the first detecting tank and theregulating tank by a water outlet pipe and a bypass pipe; the water outlet pipe is provided with a first control valve, and the bypass pipe is provided with a second control valve; the regulating tank communicates with the second detecting tank; and a drainage outlet communicating with the outside is formed in each of the first detecting tank and the second detecting tank. The disintegration tankwith shock resistance is additionally provided with the regulating tank on the basis of a traditional continuous disintegration tank, and the regulating tank is capable of temporarily storing wastewater, so that the phenomenon that wastewater not reaching a discharge standard in the disintegration tank has to be discharged when radioactive substances are leaked to result in radioactive contamination accidents is avoided.

The invention relates to the technical field of automatic driving, in particular to a road worker safety enhancing system in an automatic driving traffic environment. The system comprises a vehicle control module, a vehicle-side V2X device, an automatic driving sensing unit and a human-side V2X device which are integrated on a vehicle. The vehicle control module is used for determining whether thevehicle is in an out-of-control state or not, carrying out alarming based on the determination of the out-of-control state, and sending an alarm signal to the vehicle-side V2X device; the vehicle-side V2X device is used for receiving the positioning information of the road workers and broadcasting the positioning information to the surrounding V2X device; the automatic driving sensing unit is used for acquiring position information of road workers; and the human-side V2X device is used for sending the positioning information of the road workers to the vehicle-side V2X device and giving an alarm to the road workers. When the automatic driving vehicle is out of control, the vehicle end sends out out-of-control information for broadcasting to the surrounding devices through the V2X; and after the human-side V2X wearing part receives the out-of-control information, the V2X wearing part gives an alarm prompt to road workers to realize avoidance.

The invention provides a dual-source battery pack and an electric vehicle. The dual-source battery pack comprises a battery pack bin and a main battery pack, an auxiliary battery pack, a DC/DC converter and a control unit, wherein the main battery pack, the auxiliary battery pack, the DC/DC converter and the control unit are located in the battery pack bin. The first end and the second end of theDC/DC converter are connected with the total positive end and the total negative end of the auxiliary battery pack. The third end of the DC/DC converter is connected with the total positive end and the total positive output end of the main battery pack. The four end of the DC/DC converter is connected with the total negative end and the total negative output end of the main battery pack. A chargeand discharge path of the main battery pack and the auxiliary battery pack is formed. The control unit is connected with the DC/DC converter, the main battery pack and the auxiliary battery pack. Charging and discharging control of the auxiliary battery pack is realized by controlling the working states of the DC/DC converter. The core standards of the main battery pack and the auxiliary battery pack are different. By means of the dual-source battery pack, the power and economy of the electric vehicle are ensured, meanwhile, the performance requirement for the auxiliary battery pack is reduced, and the cost of the dual-source battery pack is saved by 10-30% compared with the cost of an original battery set.

The invention discloses an elevator single brake set redundancy hydraulic control loop. The elevator single brake set redundancy hydraulic control loop comprises three brake pressure adjusting valves,three pressure sensors, three A1 electromagnetic reversing valves, three A3 electromagnetic reversing valves, a controller, three C1 electromagnetic reversing valves, a single brake set and an oil source. By reasonably arranging the brake pressure adjusting valves, the volume of a control containing cavity is decreased, and the pressure of the single set of brakes is controlled by the separate brake pressure adjusting valves, so that the dynamic response characteristic, control precision and stability of the pressure are improved. The elevator single brake set redundancy hydraulic control loop has the advantages of high pressure control precision, good response characteristic and system stability, safety redundancy and the like.