46results about How to "Increase safety redundancy" patented technology

This invention discloses a multi-level redundant protection elevator anti-overshoot and anti-fall composite braking and buffer system, including a guide rail electromagnetic adsorption braking module, a directional airflow damping deceleration module, a robotic arm-type safety airbag buffer module, a working condition detection unit, and an intelligent control and power supply redundancy module. The guide rail electromagnetic adsorption braking module includes excitation coils, insulated fixing brackets, and segmented switch units arranged in sections along the elevator's T-shaped vertical guide rail. The directional airflow damping deceleration module includes directional air supply modules and segmented airflow ducts installed at the top of the elevator shaft and on the vertically segmented side walls of the shaft. The robotic arm-type safety airbag buffer module is embedded in the lower surface of the elevator shaft's top floor slab. The working condition detection unit integrates a car speed sensor, a position encoder, a load acquisition unit, an acceleration monitoring unit, an overshoot / undershoot limit prediction switch, and an airbag trigger distance sensor. This invention integrates a three-level progressive protection structure to achieve flexible protection throughout all working conditions and the entire travel distance.

The invention relates to the technical field of urban construction, in particular to a kerb and tile visual grabbing control system. A kerb and tile visual grabbing control system comprises a visual identification module, a system control module and a six-axis mechanical arm module, the six-axis mechanical arm module comprises a mechanical arm main body and an auxiliary control assembly, the mechanical arm main body is used for grabbing and laying kerbs and tiles, and the auxiliary control assembly is used for controlling the mechanical arm main body. The mechanical arm body comprises a supporting arm, a lifting arm, a swing arm and a mechanical claw which are sequentially and rotationally connected, and the auxiliary control assembly is connected between the front end of the supporting arm and the front end of the swing arm and used for supporting the mechanical arm body and reducing the equipment load. According to the mechanical arm, the torque generated to the front end of the swing arm when the mechanical claw grabs a heavy object can be effectively shared, the load of each joint motor is greatly reduced, and therefore the structural rigidity and the movement stability of the whole mechanical arm under the heavy-load and large-arm-span working conditions are enhanced, and the precision and stability of the laying action are ensured.

The invention belongs to the technical field of monorail crane oil temperature control, and particularly relates to a distributed oil temperature control system and method suitable for a monorail crane. An oil suction port of the variable hydraulic pump is connected with a hydraulic oil tank; an inlet of the high-pressure filter is connected with an oil outlet of the variable hydraulic pump; the heat dissipation part is connected to an outlet oil way of the high-pressure filter in series; the pilot control oil way comprises a pilot overflow valve group, a temperature control valve group and a shuttle valve; a P port of the pilot overflow valve group is connected with an oil outlet of the high-pressure filter, and an A port of the pilot overflow valve group is connected with an outlet of the heat dissipation part; a port P of the temperature control valve group is connected with a control oil outlet of the pilot overflow valve group, and a port T of the temperature control valve group is connected with a hydraulic oil tank and used for sensing system oil temperature; a port A of the shuttle valve is connected with an outlet of the temperature control valve set, and a port R of the shuttle valve is connected with a port X of the volume adjustable hydraulic pump. The temperature control valve set is arranged to adjust pilot control oil pressure according to oil temperature changes, the displacement of the volume adjustable hydraulic pump is controlled through the shuttle valve, and self-adaptive control over the rotating speed of the cooling fan is achieved.

This invention belongs to the field of exhaust gas treatment technology, and specifically relates to an exhaust gas combustion furnace, including an igniter, a combustion chamber, a base, and a main exhaust pipe. The igniter is connected to one end of the combustion chamber, and the main exhaust pipe is connected to the other end of the combustion chamber. The base is fixed to the bottom of the combustion chamber, and an outer expansion body is mounted on the outside of the base, enclosing the combustion chamber. The outer expansion body has multiple pairs of movable slots, each pair of slots being located on the left and right sides of the combustion chamber and communicating with it. An opening and closing door is movably connected within the movable slot, and a secondary exhaust pipe is inserted into the side of the opening and closing door. The advantages are: this invention can flexibly change the combustion space during instantaneous combustion, thereby achieving rapid pressure relief and expansion, preventing excessive internal pressure of the combustion chamber from causing damage, and improving safety redundancy.

This invention discloses a vehicle trust assessment method for cooperative decision-making at unsignalized intersections, belonging to the field of intelligent transportation and autonomous driving cooperative control technology. The method first acquires multi-source state and interaction information of the target vehicle and conflicting vehicles, constructing reference position estimates and physical interaction characteristics. Then, based on multi-source observation consistency analysis, it calculates the information reliability of the target vehicle and, combined with the spatiotemporal interaction relationship between vehicles, calculates the physical interaction trust of the conflicting vehicle pairs. Further, it determines the comprehensive trust based on the information reliability and physical interaction trust, and generates a safe time interval between vehicles based on the comprehensive trust. This interval is then used as a conflict constraint parameter input into the intersection cooperative scheduling model to achieve adaptive optimization control of vehicle passage order and entry time. This method can adaptively adjust the safe time interval between vehicles under conditions of uncertainty in vehicle state information, differences in vehicle execution consistency, and complex interaction relationships, improving the safety, stability, and traffic efficiency of cooperative decision-making at unsignalized intersections.

The application discloses a disc buckle type scaffold self-locking lower support structure and relates to the technical field of scaffolds, which comprises a supporting screw rod and an extension assembly. The extension assembly provides a detachable sleeve shaft structure between the supporting screw rod and a supporting sleeve rod. When thread damage occurs, only the damaged sleeve shaft structure needs to be quickly removed and replaced, thereby reducing maintenance cost and the risk of thread damage failure, and the safety redundancy is higher. The sleeve shaft can be designed as a variable-diameter adaptive structure, which is compatible with multiple specifications of thread sizes, improves adaptive flexibility, and expands the application range. Height adjustment is realized through the threaded connection of the moving sleeve rod and the supporting screw rod. The supporting sleeve rod is inserted into the top of the moving sleeve rod, the limiting sleeve rod is slid into the inside of the supporting sleeve rod, and after the limiting sleeve rod is inserted into the moving sleeve rod, the combination of the moving sleeve rod and the limiting sleeve rod is realized through the penetration connection of the fixing screw, so that the detachable sleeve shaft structure is formed. The connecting disc closes the top of the supporting sleeve rod and provides connection support for other scaffold structures.

The invention discloses a mammary gland endoscope preoperative anatomical variation identification method and system, and relates to the technical field of computer data processing. The method comprises the following steps: S1, acquiring heterogeneous source data, and performing spatial registration and data standardization fusion to generate a multi-dimensional fusion data set; s2, performing basic topological feature extraction based on the multi-dimensional fusion data set, and calculating edge weight information to construct a target topological graph; s3, matching and comparing the target topological graph with a preset standard topological database, and calculating topological compliance parameters based on comparison differences; s4, identifying a parameter abnormal region according to the spatial distribution characteristics of the topological compliance parameters, and generating a spatial security constraint model in combination with local spatial medium attributes; and S5, based on the spatial security constraint model, outputting structure abnormal information and corresponding optimized path planning parameters. And through multi-channel tensor quantization variation characteristics, safety constraints are constructed by using an anisotropic bounding box, and a path is optimized in combination with a potential field algorithm, so that high-precision automatic obstacle avoidance is realized.

The embodiment of the invention provides a suspension system and a vehicle. The suspension system comprises a base, a linear motor, an elastic piece and a magnetorheological damper, the base comprises a support and a lower supporting seat, one of the support and the lower supporting seat is suitable for being connected with a vehicle body, and the other one of the support and the lower supporting seat is suitable for being connected with a wheel; the linear motor comprises a stator and a rotor, one end of the rotor is connected to the support, and the end, away from the support, of the stator is connected to the lower supporting base. The elastic piece is arranged between the support and the stator and provides elastic force between the support and the stator; the magneto-rheological damper comprises an outer cylinder and a damper piston which is arranged in the outer cylinder and can move linearly relative to the outer cylinder, the magneto-rheological damper is arranged in the rotor, the outer cylinder is connected to the rotor, and the damper piston is suitable for being connected to the lower supporting base. According to the scheme, the energy consumption of the suspension system is reduced, the performance is improved, the safety redundancy is improved, and the cost is reduced.

The invention provides a light guide beam and main beam quick connecting structure for a large-span steel box girder bridge, and belongs to the field of bridge engineering. The device comprises a steel box main beam and a light guide beam, a transverse supporting plate and a longitudinal supporting plate are arranged in the steel box main beam, the light guide beam comprises two I-shaped main beams and a middle connecting frame, and a plurality of lock sleeves located on the outer side of the steel box main beam are fixedly installed on the transverse supporting plate. The ends, close to the steel box main beam, of the two I-shaped main beams are each provided with a quick positioning and locking mechanism, the quick positioning and locking mechanisms are used for being matched with a lock sleeve to achieve fixed connection of the steel box main beam and the light guide beam, and the lock sleeve is provided with a plurality of L-shaped lock openings which are rotationally and symmetrically distributed. And the quick positioning and locking mechanism comprises a plurality of rotatable rotating sleeves. The light guide beam and main beam quick connecting structure for the large-span steel box girder bridge has the advantages of being accurate in positioning, efficient in connection and reliable in locking.

The present application relates to the technical field of railway track inspection, and particularly relates to a high-speed railway intelligent track inspection operation robot operation monitoring method and system, the present application combines track turnout state data and seismic influence data to analyze abnormal conditions of track passage detection conditions, and according to the analysis result, analyzes the threat degree of the execution environment of the robot post-earthquake track inspection operation task; combining the robot's own operation data and track turnout state data, analyzes the abnormal conditions of the robot post-earthquake track inspection operation task's own operation control; based on the execution environment threat degree of the robot post-earthquake track inspection operation task, the abnormal conditions of the robot post-earthquake track inspection operation task's own operation control, the track inspection operation risk of the robot post-earthquake track inspection operation task is evaluated; according to the evaluation result, the robot emergency braking early warning is realized, so as to guarantee the operation safety of the inspection robot in the earthquake destructive environment, and the intelligent level of the high-speed railway post-earthquake track inspection operation is significantly improved.

The invention relates to the technical field of automobile seats, and provides an automobile seat partition rapid temperature control and fatigue awakening device and method. The device sequentially comprises a coating layer, a flexible soaking layer, a thermoelectric module array, a micro-channel liquid cooling plate, a heat insulation supporting layer, a sponge substrate, a pressure sensor array, a temperature sensor array, a control unit, a liquid cooling circulating pump and an air conditioner heat exchanger. The thermoelectric module array at least comprises two semiconductor thermoelectric modules which are respectively arranged in the cushion area and the neck area; the control unit controls the corresponding semiconductor thermoelectric module and the liquid cooling circulating pump to perform top-speed heating or top-speed cooling; and when a fatigue state signal of the vehicle-mounted DMS system is received, the semiconductor thermoelectric module at the neck is controlled to output high-frequency pulse current so as to generate rapid temperature difference jump. The thermoelectric module is coupled with an air conditioner liquid cooling loop through the micro-channel liquid cooling plate, the heat dissipation bottleneck of a traditional semiconductor seat is solved, and dynamic temperature control of each partition is achieved by generating a body pressure cloud picture.

The utility model discloses a four point of prefabricated concrete block's even load hoisting structure, including a plurality of groups fixed setting on the hoisting ring of prefabricated concrete component, every group hoisting ring at least includes two, and the inside of every group hoisting ring is provided with a rigid link, and the rigid link passes through all hoisting rings of this group, and the middle part of rigid link is fixedly connected with one end of steel wire rope, and the other end of a plurality of steel wire ropes is concentrated in hoisting equipment lifting point. Both ends of rigid link are fixedly provided with end anti -slip device. Through the even load design of " multiple hoisting ring + rigid link", effectively disperses the concentrated load, and the safe lifting weight of single lifting point is doubled, and successfully breaks through the technical bottleneck of the hoisting of hundred tons class concrete component. The rigid link ensures that a plurality of hoisting rings are uniformly and synchronously stressed, and the end anti -slip device completely eliminates the risk of rod disengagement, and the structure is stressed explicitly, and the safety redundancy is high.

This invention discloses a magnetic coding unit material for road area information used in autonomous driving and its preparation method. The magnetic coding unit material is made of asphalt, limestone, magnetic ceramics, and composite mineral powder. The mass of the asphalt is 5.1% of the sum of the masses of the limestone and composite mineral powder, and the mass of the magnetic ceramics is 10%-80% of the sum of the masses of the limestone and magnetic ceramics within the same gradation range. After being magnetized by a magnetizer, the material of this invention, combined with an onboard gaussmeter, can read the binary coding information of the road, achieving comprehensive, rapid, and efficient detection and identification of road area information. It has advantages such as low cost, high reliability, energy saving, and environmental protection, while also possessing good thermal stability, corrosion resistance, mechanical properties, and electromagnetic characteristics.

The application discloses a kind of fast frequency modulation demand evaluation method and device considering low penetration power recovery characteristics, method includes: constructing the system frequency response model of time-varying disturbance and fast frequency modulation response model considering in low penetration fault process;Frequency minimum point is obtained according to system frequency response model;With the inherent delay time of fast frequency modulation response model, ramp rate and action capacity upper limit construct optimization vector;According to optimization vector, initial optimization matrix is constructed;After abnormal vector elimination to initial optimization matrix according to frequency minimum point, the fitness of each vector is calculated according to preset target function, and the vector with highest fitness is selected as first vector;With first vector as update reference, first matrix is obtained by adaptive optimization through IAOA algorithm;Initial optimization matrix is updated to first matrix and iterative optimization is carried out;After iteration, the vector with highest fitness in last iteration is output.

This invention belongs to the field of elevator light curtain technology and discloses an elevator light curtain with door opening and closing warning function. It includes a light curtain housing and positioning frames fixed at both ends. A groove is formed on the left side of the light curtain housing, and the light curtain body is connected inside the groove. Warning LEDs are installed on both sides of the light curtain body. A movable frame is fitted around the outside of the light curtain body. Limiting grooves are formed on the front and rear sides of the light curtain housing, and the movable frame slides in cooperation with the limiting grooves. This elevator light curtain with door opening and closing warning function completely changes the traditional "passive response" safety protection mode of light curtains through the design of multiple arrays of dual-color warning LEDs, constructing an active and efficient warning system. During the elevator door closing process, the high brightness and wide warning range of the dual-color flashing lights can clearly remind the elderly and children who move slowly, and can also effectively attract the attention of passengers focused on electronic devices, avoiding collisions or pinching accidents caused by delayed reaction.

This invention relates to the field of automotive power steering pump technology, specifically to a dual-source electric power steering pump switching control system and its power steering pump. The system includes a motor housing and a stator winding fixed inside and within the motor housing. The stator winding consists of a high-voltage winding and a low-voltage winding, which operate independently. When the vehicle's high-voltage power supply fails, the stator winding switches from high-voltage to low-voltage operation. This dual-source electric power steering pump switching control system, combined with the single-motor, dual-winding design of the dual-source electric power steering pump, enables switching to the low-voltage winding when the vehicle's high-voltage power supply fails. This drives the power steering pump to provide degraded but safe power steering assistance, achieving a "limp-home" function, preventing the vehicle's steering wheel from completely losing power assist, facilitating parking, and improving safety redundancy.

The invention belongs to the field of battery inactive part structures, and particularly discloses a lithium battery multistage explosion-proof mechanism used in a vacuum high-temperature environment, the lithium battery multistage explosion-proof mechanism comprises a shell, a heat absorption material and a pressure release valve, a partition plate is arranged in the shell, the partition plate divides the shell into a battery cabin and a material cabin which are relatively independent, and a plurality of pressure release holes are formed in the partition plate in a penetrating manner; the shell is provided with a pressure relief opening, and the pressure relief opening communicates with the material bin. The heat-absorbing material is granular and is filled in the material cabin; and the pressure relief valve is mounted at the pressure relief opening. Along with the heating process of the battery, the air pressure in the shell is effectively reduced through three pressure relief mechanisms, and the safety redundancy is improved.

The utility model discloses a directional drilling hole wall stability maintaining device applied to a fractured stratum, which belongs to the technical field of engineering geological investigation and comprises a main pipe body, a sealing unit and a separating unit, and the sealing unit and the separating unit are respectively sleeved on the main pipe body. The two sealing units are arranged in the axial direction of the main pipe body in a spaced mode so that a closed space can be formed between the two sealing units. The closed space is divided into a plurality of subspaces through a plurality of separation units, and grouting holes are formed in the main pipe body so that the subspaces can be filled with slurry. The separation units in the hole wall stability maintaining device can provide radial support for the main pipe body while separating the closed space, then in the grouting process, grouting permeation reinforcement and active supporting of the separation units are achieved at the same time, meanwhile, an anchoring piece can be arranged so that mechanical anchoring can be achieved, a collaborative supporting system can be constructed, and the hole wall stability maintaining device can be used for maintaining the hole wall stability. The stability of grouting operation is greatly improved, the safety redundancy is improved, and the engineering accident risk is reduced.

The invention discloses a control method and a control system for an agv transport vehicle for thermal insulation pipe machining. The control system comprises a load state sensing module, a gravity center dynamic evaluation module, a path dynamics modeling module, a self-adaptive motion planning module and an execution control module. By integrating a high-precision weighing sensor array, a multi-point displacement detection unit and a clamping jaw pressure sensing array, the full-dimension real-time sensing of the load state of the polyethylene outer sleeve is realized, and the limitation that the prior art only depends on single overload alarm is overcome; a gravity center dynamic evaluation model constructed based on measured data can accurately quantify the mass center offset degree, and a reliable physical basis is provided for subsequent motion planning; according to the provided self-adaptive motion planning mechanism, load dynamic characteristics and path geometric constraints are deeply fused, and pipe body slippage or rolling caused by inertia moment superposition is fundamentally avoided.

The utility model relates to a thermal -insulated quilt roll -out equipment technical field, concretely is a kind of thermal -insulated quilt limiting device, including base rod and the connecting rod connected with the base rod, two support tubes are fixedly arranged on base rod, rotatably connected with movable arm between two support tubes, the connecting rod on the side away from the support tube is fixed with adjusting assembly, and the adjusting assembly upper end is equipped with switch assembly. The utility model adopts the non-contact switch assembly of hall sensor and magnetic piece, replaces traditional mechanical contact structure, avoids the abrasion problem caused by mechanical friction, prolongs service life;Non-contact detection is not interfered with by greenhouse outside water vapor, dust simultaneously, greatly reduces malfunction or malfunction probability, ensures that roll-up curtain system stable trigger stop, reduces equipment damage, thermal -insulated quilt drop risk.

The application provides a kind of automatic driving space-time trajectory repair method and system based on perception confidence, method includes detecting space-time conflict point in original planning trajectory and locking failure point;Based on vehicle-mounted multi-sensor data fusion calculation includes environment robustness and space-time consistency comprehensive perception confidence;Strong coupling time dimension constructs four-dimensional space-time state diagram;According to the comprehensive perception confidence dynamic adjustment safety boundary, and to the high-risk candidate connection edge that crosses safety boundary is topologically pruned to greatly reduce search space;Based on the four-dimensional state diagram after pruning, efficient full space-time parallel trajectory search is executed;Finally, the discrete node sequence is dynamically smoothed and physically constrained, and the functional safety degradation control strategy is output to the safe and reliable chassis execution trajectory.The application breaks the open loop barrier of perception and planning, significantly improves the safety, real-time performance and system-level functional safety level of trajectory repair in complex dynamic and severe scenarios.

The utility model discloses a kind of gate sealing devices of shield machine, belong to shield machine gate technical field.Aiming at the problem that shield machine gate sealing effect in prior art needs to be improved, the utility model greatly improves sealing reliability by bilateral main and auxiliary sealing elements synergistic effect, slag ring active interception impurity, compression spring provides thrust to continue to compensate the wear of dynamic sealing lip, ensure the close fit under high pressure;Pressure cavity introduces medium pressure to form self-tight type sealing, significantly reduce sealing lip load, prolong service life;Leakage chamber design combines pressure detector and indicator light, realize real-time alarm and early intervention of leakage, avoid sudden failure;Grease hole supports maintenance without stopping, inject sealant can temporarily repair microleakage.The overall structure has self-adapting sealing ability under high pressure, complex working condition of slag, maintenance cost is significantly reduced, safety redundancy is comprehensively enhanced.

The application discloses a water-rich soft rock foundation pit adjacent tunnel stability control method based on artificial intelligence, which comprises the following steps: prior prediction based on a finite element model, monitoring sensor arrangement, construction and training of a neural network model, scheme safety verification, initial decision based on the neural network model, initial grouting scheme execution, real-time monitoring-based cyclic intelligent decision and online incremental learning; training data is generated by establishing a three-dimensional finite element model containing a water-soil coupling mechanism, a neural network model capable of mapping the complex nonlinear relationship between monitoring parameters and optimal grouting schemes is constructed and trained, dynamic decision is made, and the grouting scheme that has passed safety verification is output and the model is continuously optimized; the method realizes the whole-process closed-loop intelligent control from intelligent prediction, real-time decision, safety control to self-optimization, and significantly improves the guarantee capacity and risk control level of the stability of the adjacent tunnel during foundation pit excavation in the water-rich soft rock complex stratum.

The utility model relates to the technical field of band-type brakes, in particular to a band-type brake torque dynamic compensation adjusting device which comprises a base, a band-type brake body is arranged at the top of the base and connected with a band-type brake braking torque detecting device, and a transmission shaft is integrally formed on the front side of a band-type brake wheel of the band-type brake body. An auxiliary braking assembly is arranged at the top of the base and located in front of the band-type brake body and comprises a fixed vertical plate installed on the front side of the top of the base through bolts, a rotating block is rotationally connected to the rear side of the fixed vertical plate, a braking wheel is arranged on the outer wall of the rotating block, and a dynamic compensation assembly used for braking the braking wheel is arranged at the top of the base. According to the band-type brake torque dynamic compensation adjusting device, through the linkage design of the auxiliary braking assembly and the dynamic compensation assembly, a redundant braking system is formed, secondary braking force is provided when braking force of the band-type brake body is reduced, and the safety redundancy capacity of an elevator system is remarkably enhanced.

The invention discloses a hoisting device and process for hoisting a large section of a steel box girder, and relates to the technical field of bridge construction, the hoisting device comprises a hoisting mechanism, a welding mechanism is arranged on the outer side of the hoisting mechanism, and the bottom of the welding mechanism is fixedly connected with the top of the hoisting mechanism; the lifting mechanism comprises a bridge, piers are fixedly connected to the bottom of the bridge, pre-assembled sections are fixedly connected to the outer side of the bridge, stand columns are fixedly connected to the tops of the pre-assembled sections, inclined struts are fixedly connected to the outer sides of the stand columns, the tops of the multiple stand columns are fixedly connected with the same lifting platform, and the same lifting platform is fixedly connected to the tops of the multiple stand columns. The top of the lifting platform is fixedly connected with a hydraulic lifter, and the bottom of the hydraulic lifter is fixedly connected with a steel strand. According to the hoisting device and process for hoisting the large section of the steel box girder, the main bridge steel box girder is divided into a plurality of sections, and the middle large section is integrally hoisted and mounted, so that high-altitude scattered splicing is avoided, and the field welding workload is greatly reduced.

The application provides a hydraulic creeping formwork device and method for construction, and relates to the technical field of hydraulic creeping formwork, which comprises a rack and a guide rail, the outer surface of the rack is provided with a safety mechanism, the safety mechanism comprises a support frame, the inner surface of the support frame is rotationally connected with a support rod through a bearing, the outer surface of the support rod is fixedly connected with a triangular plate, the outer surface of the triangular plate is rotationally connected with a centrifugal plate through a bearing, and the outer surface of the centrifugal plate is fixedly connected with a rubber pad. The application overcomes the spring tension opening, utilizes the friction force of the rubber pad to drive the rotation of the disc, finally makes the positioning rod inserted into the positioning groove of the guide rail through the inclined chute guide to realize the rigid locking of the support frame and the guide rail, and then indirectly locks the rack. The response is triggered rapidly, the rigid locking structure has high bearing capacity, can stably bear the impact load under the full load state of the rack body, has high anti-falling reliability, significantly improves the safety redundancy of the traditional anti-falling device, and can effectively avoid high-altitude falling accidents.

This utility model discloses an electromagnetic anti-fall structure for attached lifting scaffolding, relating to the field of attached lifting scaffolding technology. It includes an electromagnetic ejection device, which comprises an external housing containing an electromagnetic coil. This application provides an electromagnetic anti-fall structure for attached lifting scaffolding. Through the cooperation of the electromagnetic ejection device and the anti-fall slider, the mechanical structure provides anti-fall protection during the ascent phase entirely through the inclined surface of the anti-fall slider, requiring no electrical intervention. During the descent phase, electromagnetic dynamic protection is provided, triggering braking only in cases of abnormal overspeed. Furthermore, the electromagnetic power-off braking is a passive safety mechanism; even in the event of a control system failure, the compressed spring can still forcefully eject the anti-fall slider after power failure, avoiding the risk of single-point failure. This design integrates the reliability of mechanical anti-fall protection, the precision of electromagnetic control, and the intelligent judgment capability of sensors, significantly improving the safety redundancy of the lifting scaffolding.

The application relates to a trihull piece relative displacement self-unloading connecting device and a trihull, the connecting device comprising a piece connecting base, a connecting bridge connecting base, a plurality of bolts, a plurality of nuts, a plurality of pressure springs and at least one redundant connecting piece, a first flange and a second flange are oppositely arranged to form a pair of flange faces; each bolt passes through corresponding bolt holes of the first flange and the second flange in sequence; each nut is threadedly connected with the end of one bolt; each pressure spring is sleeved on one bolt and is located between the first flange and the second flange; and the initial compression amount of the pressure spring is generated by tightening the nut. When the first flange and the second flange present a mutual approaching movement trend, the pressure spring is further compressed and deformed to release the relative displacement between the first flange and the second flange; and when the first flange and the second flange present a mutual moving away movement trend, the bolt bears a tensile load to maintain the connection.

The utility model discloses a steam-gas seal steam leakage cooling system of a supercritical back pressure steam turbine, and relates to the technical field of steam turbine power generation, a plurality of branch pipelines are branched from a high-pressure shaft end steam seal pipeline group and are communicated with a water spraying assembly, and a low-pressure shaft end steam seal pipeline group is also communicated with the water spraying assembly; an expansion chamber formed by local diameter expansion is arranged at the connection part of the water spraying assembly; the branch pipeline terminal and the low-pressure shaft end pipeline terminal converge to a cooling pipeline, the cooling pipeline is communicated with a cooler, and safety pipelines and electric valves are arranged on the upstream portions of the high-pressure shaft sealing pipeline set and the low-pressure shaft sealing pipeline set. When the system works, efficient cooling of steam seal leakage under supercritical parameters is achieved through graded water spraying cooling, chamber expanding for gas-liquid mixing strengthening, secondary cooling of a cooling pipeline and emergency switching of a safety pipeline, compared with a traditional technology, the cooling efficiency is improved, the safety redundancy is improved, and the system can adapt to steam turbine load fluctuation; the device has the advantages of high cooling efficiency, safety, reliability, convenient maintenance and the like.

The invention belongs to the technical field of automatic loading and unloading, and particularly relates to an automatic loading and unloading device for processing of an internet of things equipment shell, which comprises a base frame, a suction cup assembly and a clamping jaw assembly which are mounted on the base frame, and further comprises a vacuum generation device, an automatic loading and unloading device and an automatic loading and unloading device, negative pressure is formed in an inner cavity of the suction cup assembly in the suction stage; the pressure detection unit is configured to collect the current vacuum degree value of the inner cavity of the suction cup assembly in real time and obtain the pressure change characterization quantity at the current moment; the control module is electrically connected with the pressure detection unit, the vacuum generation device and the clamping jaw assembly, and the control module is configured to periodically obtain the current vacuum degree value and the pressure change characterization quantity in the carrying stage after the suction stage is completed; a three-level progressive protection strategy is formed through cooperation of the structures, and safety redundancy in the carrying process is remarkably improved.