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 dual-source battery pack, a management method and system and an electric vehicle. The dual-source battery pack comprises a main battery pack bin which comprises a main batterypack and a control unit and is fixed in the electric vehicle and an auxiliary battery pack bin which comprises an auxiliary battery pack and is detachably installed in the electric vehicle. The firstend and the second end of the DC / DC converter are connected to the total positive end and the total negative end of the auxiliary battery pack, the third end is connected with the total positive endand the total positive output end of the main battery pack, the fourth end is connected with the total negative end and the total negative output end of the main battery pack, and a charging and discharging path of the main battery pack and the auxiliary battery pack is formed. The control unit realizes charge and discharge control of the auxiliary battery pack by controlling the DC / DC converter.The battery cell standard of the main battery pack and the battery cell standard of the auxiliary battery pack are different. The dual-source battery pack reduces performance requirements of the auxiliary battery pack while guaranteeing the power and economy of the whole vehicle, and saves the cost compared with an original battery set by 10-30%.

The invention discloses a suspension connecting joint for a large-span cantilever steel truss and a construction method of the suspension connecting joint. The suspension connecting joint comprises steel pipe columns, cantilever main beams, temporary steel pull rods and fixing steel pull rods. Steel corbels are arranged at the side ends of the steel pipe columns, vertical column lug plates are arranged at the bottom ends of the steel corbels, and web plates are arranged at the ends, far away from the steel pipe columns, of the steel corbels. One end of each cantilever main beam is connected tothe corresponding web plate, and beam joints are arranged at the ends, far away from the steel pipe columns, of the cantilever main beams and used for being connected with edge beams which are perpendicular to the cantilever main beams. A beam lug plate is fixedly arranged at the top end of each cantilever main beam. Connecting plates are fixedly arranged at the two ends of each temporary steel pull rod, the two connecting plates of each temporary steel pull rod are fixedly connected with the corresponding column lug plate and the corresponding beam lug plate. The structure is constructed inthe forward direction from bottom to top, the temporary steel pull rods are adopted to assist in layer-by-layer installation and adjustment of the cantilever main beams, component hoisting is furtherprotected, an operator has a working face and safety protection, the suspension structure is constructed layer by layer from bottom to top in sequence, component installation is facilitated, and the efficiency is improved.

The invention provides a pneumatic braking control unit for railway vehicles. The pneumatic braking control unit for railway vehicles comprises nine pressure detection connectors, four pressure sensors, two pressure switches and a relay valve, wherein the nine pressure detection connectors are used for detecting the pressures in corresponding pipelines; the four pressure sensors are used for converting pressure signals in the corresponding pipelines into electric signals and outputting the electric signals; the two pressure switches are used for carrying out detection, displaying, alarming and control output on the pressures in the pipelines so that the normal operation of the whole pneumatic braking control unit for railway vehicles can be ensured; and the relay valve is used for controlling air exhausting or air inflation according to the internal pressure change. The pneumatic braking control unit for railway vehicles is high in degree of integration, high in control precision and good in stability, the safety performance index and the maintainability index of a braking system are increased, and meanwhile the system safety is high.

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 invention relates to the technical field relevant to simulation and testing of an electric automobile electric driving system, in particular to a hardware-in-loop simulation testing system and method based on a power level virtual motor. The system structurally comprises an isolation type AC / DC rectification module (1), an isolation type DC / DC module (2), the power level virtual motor (3), a tested motor controller (4) and an upper computer (5), wherein the power level virtual motor comprises a port current simulation module (31), a rotary transformer / temperature signal simulation module (32) and a virtual motor real-time control system (33). The hardware-in-loop simulation testing system and method based on the power level virtual motor have the advantages that the work current and fault states of the motor can be effectively restored; the work performance and characteristics of the motor controller and the motor under the complete automobile work condition are tested and verified; important significance is realized on the design and performance evaluation of the motor controller and the motor; and the testing system and method can also be applicable to various fields such asweapon equipment, aerospace and mechanical electronics.

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 relates to the technical field of engineering machinery, and discloses a lateral load protection device and a method for a crane. The lateral load protection device comprises: a calculating unit which is used for calculating a current lateral load moment of a crane; a judging unit which is used for judging whether the lateral load moment is higher than a predetermined value; a treating unit which is used for locking actions for increasing the lateral load when the lateral load moment is higher than the predetermined value, and for permitting actions for increasing the lateral load when the lateral load moment is lower than the predetermined value. The lateral load protection device for a crane provided by embodiments of the invention calculates a current lateral load moment when a crane is working through a pressure difference between charged oil and discharged oil of a rotary motor and other parameters, locks actions for increasing the lateral load when the lateral load moment is higher than a predetermined value, thus avoids damage of a big arm and a derricking cylinder caused by the excessive high lateral load, and improves the safety redundancy when the crane is working.

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 fracturing truck and a drive conveying system thereof. The drive conveying system of the fracturing truck comprises one or more engines, a plurality of oil pumps, a control valve set, a first conveying mechanism and a second conveying mechanism. The first conveying mechanism and the second conveying mechanism respectively comprise an oil cylinder and a pressure cylinder. A plug body is arranged at the extending end of a piston rod of each oil cylinder, and each plug body is movably arranged in the corresponding pressure cylinder. When the number of the engine is one, the engine is used for driving multiple oil pumps, and when the number of the engines is multiple, each engine is used for driving at least one oil pump. The control valve set is used for controlling the oil inlet and oil returning state of the oil cylinder in the first conveying mechanism and the oil cylinder in the second conveying mechanism. According to the fracturing trunk and the drive conveying system thereof, the output pressure and flow coverage range can be effectively increased, the model selection difficulty and the cost of related parts can be effectively lowered, meanwhile, the safety redundancy rate of the drive conveying system of the fracturing truck can be effectively improved, and the service life of a conveying mechanism can be prolonged.

The invention is applicable to the technical field of gearboxes and provides a half-slip clutch gearbox. An input shaft, a first middle shaft and a second middle shaft which are in transmission connection with each other are arranged. One end of the first middle shaft is connected with a first shell gear through a half-slip clutch. One end of the input shaft is connected with a second shell gear through a first clutch. The second shell gear is also fixedly connected with an output shaft. One end of the second middle shaft is fixedly connected with a third shell gear through a second clutch. Besides, the first shell gear, the second shell gear and the third shell gear mesh with each other and thus can be in transmission through multiple routes respectively. According to the half-slip clutchgearbox, the problems of a large amount of heat dissipation and poor manipulability brought by use of extra-large specification slip clutch are solved; by adopting mutually-independent transmission routes, the systematic safety redundancy degree is improved; and even though one transmission route fails, it can still be guaranteed that the system continues working.

The invention discloses high-toughness high-carbon wheel steel for a heavy-load rail wagon and a preparation method of the high-toughness high-carbon wheel steel for the heavy-load rail wagon. The high-toughness high-carbon wheel steel for the heavy-load rail wagon comprises, by weight percentage, 0.67%-0.77% of C, 0.15%-1.00% of Si, 0.60%-0.90% of Mn, smaller than or equal to 0.025% of Als, smaller than or equal to 0.025% of P, 0.006%-0.020% of S, 0.005%-0.015% of V, 0.10%-0.15% of Cr and the balance Fe and inevitable impurity elements. The high-toughness high-carbon wheel steel for the heavy-load rail wagon is formed by the electric furnace steel making working procedure, the LF refining working procedure, the RH vacuum treatment working procedure, the circular blank continuous casting working procedure, the cut ingot hot rolling working procedure, the heat treatment working procedure, the processing working procedure and the finished product detection working procedure. The high-toughness high-carbon wheel steel, obtained according to the preparation method, for the heavy-load rail wagon is of a ferrite and pearlite structure. Compared with AAR-C wheel steel, the high-toughnesshigh-carbon wheel steel for the heavy-load rail wagon has the advantages that on the premise that the levels of mechanical properties of rims are basically equivalent, the low temperature impact toughness of the rims of wheels can be remarkably improved, and therefore the breakage resistance capacity of the wheels at the low temperature is effectively enhanced.

The invention discloses a traction-propulsion type tilt wing vertical take-off and landing manned aircraft, which is characterized in that tiltable front wings are arranged on the two sides of the front end of a fuselage, and tiltable rear wings are carried on the two sides of the rear portion of the fuselage; a rotor wing system comprises a traction-type front propeller which is arranged at the front end of the fuselage and is carried by a tilting front wing, and propulsion-type rear propellers which are arranged on a tilting rear wing and are respectively positioned on two sides of the fuselage; an empennage is arranged at the tail of the fuselage; and the fuselage has a space for accommodating at least two passengers and an operating system. According to the empennage of the aircraft, the stability and the maneuverability of the aircraft in the tilting transition stage and the cruising process are improved; the multi-point symmetrical power layout formed by the multiple propellers enables the aircraft to have enough pitching and rolling balance redundancy in the vertical take-off and landing state and the hovering state, and the safety redundancy of the whole aircraft is improved; a relatively independent tilting mechanism enables the aircraft to have stronger maneuvering characteristics in vertical take-off and landing and hovering states; and the rotor ring way improves the propeller efficiency and the safety of the high-energy rotor.

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 a scientific investigation operation workshop with a watertight sea-skimming moon pool, and belongs to the technical field of ship design and manufacturing. The workshop comprises a Kingston moon pool, a moon pool retracting and releasing system, a multifunctional comprehensive travelling crane, a ship side gangway, a moon pool hatch cover, a winch and a guide pulley; the scientific investigation operation workshop is internally provided with a lunar pool, and a lunar pool folding and unfolding system is arranged corresponding to a through hole of the lunar pool; a multifunctional comprehensive travelling crane is arranged on one side of the moon pool folding and unfolding system, and a winch is arranged on the other side of the moon pool folding and unfolding system; the winch is connected with the moon pool retracting and releasing system and the multifunctional comprehensive travelling crane through a guide pulley; moon pool cabin covers are arranged at the two ends of the through hole of the sea-communicated moon pool; the scientific investigation workshop is provided with a ship side gangway. According to the invention, a scientific investigation icebreaker can safely and reliably carry out underwater investigation work in an ice area, and safe and reliable seamless connection of underwater investigation work of the ocean and the ice area is realized; according to the scientific investigation operation workshop, a large-size operation space is provided, and the operation requirements of polar scientific investigation tasks can be met.

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 relates to a prefabricated kitchen and toilet composite slab splicing structure and a splicing method, and belongs to the field of prefabricated building components. The structure and the method are characterized in that a post-cast strip between two composite slabs is replaced by a bearing body, a Z-shaped slab reinforcing bar, a bearing body longitudinal bar and a bearing body stirrup in the bearing body are combined into an invisible support similar to a hidden beam, a special structure model is designed so that a reinforcing bar in a bottom slab body of the composite slab can penetrate through the bearing body and is anchored on the bearing body by prestress tensioning, and meanwhile, an elastic anti-cracking material is embedded at a splicing slab seam between the bearing body and the composite slab. According to the structure and the method, the assembling rate is guaranteed, and meanwhile the problems that after the composite slab is disassembled, a slab joint is reinforced, and the slab is prone to cracking and being leaked due to local slab descending are solved.

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.