444results about How to "Guaranteed stability and security" patented technology

The invention discloses a manual and automatic pressure cooker cover. The manual and automatic pressure cooker cover comprises an outer cover and an inner cover arranged on the lower portion of the outer cover and is characterized in that the lower-end edge of the inner cover is provided with clamp hooks for locking a pressure cooker inner container, the outer cover comprises an upper end cover and a lower end cover, the upper end cover and the lower end cover are fastened to each other to form a cavity between the upper end cover and the lower end cover, a drive device for driving the inner cover to rotate and unlock is arranged in the cavity, the drive device comprises a lock box, spring bolt, a handle and a worm gear-worm motor arranged in the cavity, one end of the sprint bolt is provided with teeth which can mesh with a worm on the worm gear-worm motor, and the axial direction of the worm is tangential to the peripheral direction of the inner cover. The manual and automatic pressure cooker cover has the advantages that manual pressure cooker cover opening and closing and automatic pressure cooker cover opening and closing can be switched freely, and the safety and stability ofthe high-pressure cooker is guaranteed during the switching.

The invention discloses a manual and automatic pressure cooker cover. The manual and automatic pressure cooker cover comprises an outer cover, an inner cover and a clutch mechanism and is characterized in that the inner cover is arranged on the lower portion of the outer cover, a chuck is arranged between the inner cover and the outer cover, the chuck can rotate to lock a pressure cooker inner container, the outer cover is provided with an electric drive mechanism, the electric drive mechanism comprises a worm gear-worm motor with a worm, the chuck is provided with a lock box which can swing leftwards and rightwards around the center of the chuck, and the lock box comprises a telescopic toothed spring bolt; the clutch mechanism is sued for driving the spring bolt to telescope, the teeth ofthe spring bolt mesh with the worm when the clutch mechanism drives the spring bolt to extend outwardly, and the spring bolt is separated from the worm when the clutch mechanism drives the spring bolt to retract inwardly. The manual and automatic pressure cooker cover has the advantages that manual pressure cooker cover opening and closing and automatic pressure cooker cover opening and closing can be switched freely, and the safety and stability of the high-pressure cooker is guaranteed during the switching.

The invention relates to a method for charging and navigating electric vehicles on the basis of traffic information and power grid information, and belongs to the field of operation and control technology for power systems. The method includes abstracting a road traffic network to form a traffic map and acquiring traffic flow data of various roads; computing the maximum charging power of a next moment according to prediction of future load of a distribution network and regulating the maximum number of quick chargers allowed to be started in each charging station in a future period; and monitoring various information and charging requests of the electric vehicles in real time, computing the shortest charging completion durations of a certain vehicle traveling to the various charging stations after the certain vehicle uploads a charging request, selecting the charging station corresponding to the smallest value of the shortest charging duration and navigating the electric vehicle to the charging station. The method has the advantages that the available charging load of a power system is maximized on the basis that safe and stable running of the power system is guaranteed, a charging mode with the minimum time consumption is selected from the viewpoint of a vehicle owner so as to determine a navigation route, the travel efficiency of the vehicle owner is improved, and the vehicle owner can actively follow charging guidance.

The invention provides a super-capacitor energy storage and transfer-based active equalization system and method for a lithium battery pack. The active equalization system comprises an equalization main controller, a switch array, a two-way DC/DC, a super-capacitor, a current detection and power calculation device, a 16-bit decoder and a drive circuit, wherein the equalization main controller obtains a single battery voltage inspection value as an equalization state basis and any to-be-equalized battery is gated by the switch array to be connected to an equalization bus; the preceding stage of the full-bridge two-way DC/DC with an adjustable ratio is connected with the equalization bus and the backward stage is connected with the super-capacitor; the power of the equalization loss is calculated through the current detection and power calculation device; the equalization main controller achieves charging for the super-capacitor by a high-power battery through the two-way DC/DC; and the super-capacitor stores the power and then discharges a low-power battery through the two-way DC/DC until the equalization state. The power is stored and transferred through the super-capacitor; active equalization for the lithium battery pack is achieved; and the super-capacitor energy storage and transfer-based active equalization system has an important significance for prolonging of the lifetime of the lithium battery pack.

The invention discloses a walking hydraulic control system comprising a reversible pump, a first left walking motor and a first right walking motor; the walking hydraulic control system further comprises a first flow split and flow collection valve, wherein a confluence oil opening of the first flow split and flow collection valve is communicated with a first working oil opening of the reversible pump, and two flow split oil openings of the first flow split and flow collection valve are respectively communicated with first working oil openings of the first left walking motor and the first right walking motor; and second working oil openings of the first left walking motor and the first right walking motor are communicated with a second working oil opening of the reversible pump. Compared with the prior art, the walking hydraulic control system is provided with the first flow split and flow collection valve to realize the equivalent flow split and equivalent flow collection of the walking motors on the left and right sides so as to improve the speed synchronism of the walking hydraulic motors and provide reliable guarantee for controlling the non-uniform friction of wheels. On the basis, the invention further provides self-walking type engineering machinery provided with the walking hydraulic control system.

The invention provides a walking type incremental launching device. The device comprises a slide box, a slideway, a translation jack, a jacking jack and a deviation-rectifying jack assembly, wherein the slide box comprises slide box body units and slide box body connectors connecting the slide box body units; the slide box body units are movably connected by bolts; the slide box body units and the slide box body connectors are movably connected by bolts; the slide box body connectors are movably connected by bolts; the slideway comprises slideway body units and slideway body connectors; the slideway body units are movably connected by bolts; the slideway body units and the slideway body connectors are movably connected by bolts; the slideway body connectors are movably connected by bolts; the whole slide box is put on the slideway and is of an up-down structure; the jacking jack is installed in a jacking jack installation barrel on the slideway; the translation jack is installed on a translation jack installation plate on the slideway; and the deviation-rectifying jack assembly is installed on a deviation-rectifying jack installation rack on the slideway. Used in a method for bridge incremental launching construction, the device has the characteristics of strong generality, convenience in construction and low cost.

The invention discloses a multi-infeed extra-high voltage power grid transverter wattless configuration method based on a short-circuit ratio. The extra-high voltage power grid transverter wattless configuration method comprises steps of 1) determining an object grid structure to be analyzed and related parameters, 2) arranging operation modes of an electric power system, 3) selecting a specific operation mode to calculate system load flows under different DC control modes, 4) calculating a multi-infeed short circuit ratio according to a load flow calculation result, 5) calculating a multi-infeed DC node voltage comprehensive improvement index, 6) determining a candidate node of the multi-infeed extra-high voltage DC power grid transverter wattless configuration n according to the multi-infeed DC node comprehensive improvement index, and 7) programming a single objective function optimization program according to an objective function to determine a wattless compensation capacity. The extra-high voltage power grid transverter wattless configuration method guarantees to reduce the operation cost of the power grid, guarantee the power grid to safely, reliably, economically, and efficiently operate, has significance and provides technical basis to planning design and operation control of the mmulti-infeed high voltage DC power grid.

The invention relates to the field of automobile safety, particularly to a surface evenness-based unmanned vehicle speed regulating device. The surface evenness-based unmanned vehicle speed regulating device comprises a vehicle-mounted intelligent terminal, an evenness monitoring module electrically connected with the vehicle-mounted intelligent terminal, a vehicle speed control module electrically connected with the vehicle-mounted intelligent terminal, and a steering module electrically connected with the vehicle-mounted intelligent terminal, wherein the evenness monitoring module comprises a detecting module and an information transmission module. The surface evenness-based unmanned vehicle speed regulating device is applied to solving the technical problem of controlling the speed of an unmanned vehicle by detecting road surface evenness information to select even roads for travelling.

A reverse detection method and device of an air conditioner compressor. The method comprises: determining that an air conditioner runs in a heating non-defrosting mode, a refrigeration mode, or a dehumidifying mode; collecting compressor air discharging temperature (Tt) and an air conditioner running current (It); calculating an air discharging temperature difference (ΔΤ); and determining whether the air discharging temperature difference (ΔΤ) is higher then a preset temperature difference and whether the air conditioner running current (It) is within a preset current range, and if yes, determining that the compressor runs in reverse. Also provided is a reverse detection device of an air conditioner compressor. The method and the device ensure safe and stable running of a compressor, and therefore ensure safe and stable running of an air conditioning system.

The invention discloses a multi-functional underground dinting machine. The head part of a digging arm of the multi-functional underground dinting machine is connected with an operating head, while the tail part is provided with a support (2), a revolving device is arranged between the digging arm and a worktable, one end of a small arm (4) is rotationally connected with the operating head, while the other end is connected with a movable arm (5), a movable arm oil cylinder (6) is arranged above the small arm (4) and is communicated with an oil inlet pipe (10) and an oil return pipe (11) through a connecting pipe I(8) and an oil channel control valve (9) of an operating device, one end of a large arm (3) is rotationally connected with the movable arm (5), while the other end is rotationally connected with the revolving device, a large arm oil cylinder I(14) and a large arm oil cylinder II(15) are arranged above the large arm (3), and the large arm oil cylinder I(14) is communicated with the oil inlet pipe (10) and the oil return pipe (11) sequentially through a connecting pipe II(16), the large arm oil cylinder II(15) and the oil channel control valve (9) of the operating device.

The invention relates to field of electric, in particular to a power supply device for taking electricity from a high-voltage side in an induction manner. The power supply device can provide a low-voltage power supply for a monitoring device arranged on a high-voltage transmission line or in a high-voltage switch cabinet. The structure of the power supply device comprises an electricity taking module, an electric energy conditioning module and an intellectual protection module, wherein the electricity taking module comprises a primary busbar, an current transformer magnetic core, a secondary coil, a sample resistor and a single-pole double-throw relay; the electric energy conditioning module comprises a rectification circuit, a point bleeder circuit, a grain wave filter capacitor and a voltage-stabilizing circuit; and the intellectual protection module comprises an STM8 singlechip, an RF (radio frequency) module and a super capacitor. The power supply device for taking electricity from high-voltage side in the induction manner has a protection function and an intelligent monitoring function, effectively protects the power supply device and a rear load from being burned, and real time monitor the power supply through the RF module, and ensures safety and stability of providing power supply for an outer load.

The invention relates to a charging method of a direct-current charging pile. The charging method comprises the steps as follows: user information display is read; a user is prompted to select a corresponding charging mode; card swiping information and account balance information are judged; the charging pile carries out self-inspection; if charging pile equipment is abnormal or broken down, the charging pile sends out a fault alarm signal, and is powered off; if the self-inspection result is abnormal, the charging pile is verified in the next step; if the charging pile is qualified through verification, an electric vehicle is charged; in the charging process, if the abnormal conditions such as electric leakage, overload or surge are generated, the charging pile immediately stops charging, and sends out the fault alarm signal; after charging is finished, automatic settlement is finished and the corresponding amount is deducted from an integrated circuit (IC) card according to the charging amount or the charging capacity; and a corresponding bill is printed. According to the charging method of the direct-current charging pile, intelligent charging of the charging pile is realized; the safety and the stability of the working state of the charging pile are ensured; the charging time of the electric vehicle is shortened; and meanwhile, the storage battery of the electric vehicle can be prevented from being damaged.

The invention discloses a tunnel system anchor rod design method based on the safety factor method, and belongs to the field of tunnel engineering. The safety factor of anchor rods and the safety factor of a combined arch structure which is composed of spray layers, the anchors rod and surrounding rocks are confirmed through calculating the surrounding rock pressure of an ejector anchor support system and the surrounding rocks load of the anchor rods, and combining the design function of the ejector anchor support system (being a main body of bearing or supporting temporarily), tunnel characteristics, construction quality, engineering importance and the like. Therefore, the parameter of the anchor rods is calculated, and the parameter design of the systemic anchor rods is finished. The reasonable and effective method of assembly selection and quantitative design of the anchor rods in the ejector anchor support system is provided, and the blindness and randomness of the traditional design method are avoided. The tunnel system anchor rod design method based on safety factor method is simple in step and convenient to implement, and guarantees the safety and stability of the design andconstruction of the tunnel engineering. The accuracy of the anchor rod parameter design in the tunnel ejector anchor support system is greatly increased.

The invention discloses a four-wheel independent drive vehicle stability control method based on a model prediction algorithm. The method comprises the steps of establishing a vehicle model based on monorail model data; performing state-space equation conversion and discretization processing on the vehicle model; calculating the tire cornering stiffness in real time based on a two-degree-of-freedom kinetic equation of transverse motion and yawing motion of the vehicle; performing constraint control on input and output of the vehicle model; carrying out matrix form conversion on the output of the vehicle lateral speed in the prediction time domain; and converting the target function into a standard quadratic programming form for solving. When it is detected that the lateral speed of the vehicle is high, the lateral stability controller reduces the lateral speed of the vehicle through differential driving and additional front wheel active steering, then the side slip angle is reduced, and the safety and stability of vehicle driving are guaranteed; and when it is detected that the transverse speed of the vehicle is within the safety range, the transverse stability controller does notintervene in driver operation control, and normal and safe driving of a driver is guaranteed.

The invention relates to a network safety service architecture based on a safety service chain, and a realization method thereof. The architecture comprises a safety service management platform for receiving a user safety request, extracting safety service chain information and transmitting the same to a safety function compiling engine and a traffic traction engine; the safety function compilingengine for selecting a service node for bearing instances according to the safety service chain information, forming a safety function instance deployment view, and delivering the safety function instance deployment view to the traffic traction engine; the traffic traction engine for acquiring a routing path between the safety function instances according to the safety service chain information and the safety function instance deployment view, and guiding the creation of the safety service chain according to the routing path information. By flexibly combining the instances, precisely segmenting the traffic and selecting the optimal service node of the bearing instances and establishing the multi-path routing between the service nodes, the customizable safety service is provided by sufficiently utilizing the network safety resource, and the delay of the safety service is reduced.

The invention belongs to the technical field of tunnel portal reinforcement, and discloses a construction method for reinforcement of an open cut tunnel portal. The method comprises the steps of anchor cables; frame beam construction; anti-slide pile construction; biased retaining wall construction; lining formwork, wherein trolley positioning, lining steel bar, concrete construction, disassemblyand maintenance are carried out; tunnel structure waterproofing drainage, wherein tunnel waterproofing drainage, water-stop band construction, water-stop strip construction, construction joint construction and deformation joint construction are carried out; and ditch and cable groove construction, wherein a ditch groove adopts ejecting set-shaped steel formworks, concrete is manually poured, tamping compaction is carried out by a plug-in vibrator, and a water ditch, a cable groove and a side ditch are constructed by using a whole mobile formwork. The construction method for reinforcement of the open cut tunnel portal is small in portal excavation amount, good in reinforcing effect and low in cost, and can ensure the safety stability of tunnel portal construction; and the problem of tunnelportal entrance is effectively solved, economy, rationality, safety and efficiency are achieved as best possible, and the scientific basis is provided for the design of the method for reinforcement ofthe open cut tunnel portal.

The invention discloses a superlarge floating platform based on modularizing and hybrid mooring, and belongs to the field of marine energy resource utilization. The superlarge floating platform comprises a central large platform module, a small platform module, a tension leg system, an anchor chain system, an oscillating floater type wave energy power generating device and module connecting components. The oscillating floater type wave energy power generating device converts the swinging of a floater into the horizontal movement of a piston rod in a gear and rack transmission mode and drives amotor of a bidirectional hydraulic power generation system to generate power. The module connecting components are divided into two modes according to the sizes of the connected platform modules, power generation is realized through the relative torsion and horizontal bidirectional movement between small platforms and large platforms and the relative torsion between the small platforms, and the relative movement between the modules is relieved when energy supply is obtained. The wave energy device outside the superlarge floating platform can provide energy supply through incident wave energyand can also effectively weaken the incident wave loads and reduce the movement response of the platform; by means of a hybrid mooring system with the tension leg system and the anchor chain system, the safety and stability of the whole platform can be ensured.

The invention discloses an escaping pipe. The escaping pipe comprises an indoor fixing frame (1), a bend (2) and a straight pipe (3); the indoor fixing frame (1) is fixed to the wall of a building and connected with the bend (2), the lower end of the bend (2) is connected with the straight pipe (3), and the straight pipe (3) is composed of a plurality of sections of double-wall corrugated pipes; two corrugated pipe sleeving structures are adopted in each double-wall corrugated pipe, the position between each outer-wall corrugated pipe body and the corresponding inner-wall corrugated pipe body is filled with a heat-resisting material, and crests of the outer-wall corrugated pipe bodies correspond to troughs of the inner-wall corrugated pipe bodies in parallel; flanges (4) are welded to the two ends of each double-wall corrugated pipe, every two adjacent double-wall corrugated pipes are connected through bolts by means of the flanges (4), and a buffer layer (5) is arranged on the inner wall of each double-wall corrugated pipe; and a safety hook is arranged at the top of the straight pipe, a descent control device is fixedly connected to the safety hook, and a buffer air cushion (6) is arranged at the bottom of the straight pipe (3). When the escaping pipe is used, the escaping efficiency is high, the flame retardant property is good, and the safety of a person during escaping is guaranteed.

The invention discloses a method for allowing compressed-air energy storage to participate in the primary frequency regulation of a power grid. The method comprises a step of setting a primary frequency modulation function module in an expansion generator thermal control system of a compressed-air energy storage system, wherein the primary frequency modulation function module comprises a frequencydifference module, a dead zone module, a difference adjustment module and a limiting module; a step of converting a rotation speed signal n of an expansion generator into a frequency difference by the frequency difference module, comparing the frequency difference by the dead zone module, outputting the frequency difference if the frequency difference is greater than a dead zone, entering the difference adjustment module to calculate and obtain an adjustment load value, finally outputting a load adjustment amount Delta P after the adjustment load value is subjected to maximum adjustment loadvalue limitation by the limiting module, wherein the unit of the rotation speed signal n is r/min, and the unit of the load adjustment amount Delta P is kW. According to the method, the compressed-airenergy storage can participate in the primary frequency regulation of the power grid, the lower limit of the primary frequency regulation adjustment can be canceled according to the characteristics of the compressed-air energy storage and an expander, the adjustment capability of the unit is improved, and the safety and stability of the power grid operation are ensured.

The invention discloses a breaking loading roadway repairing machine. A vehicle body part comprises a worktable, a driving device, a running device, an oil tank and a supporting leg, wherein the driving device and the running device adopt a hydraulic transmission mode, the driving device is a hydraulic driving device, is arranged at the rear portion of the worktable and comprises an explosion-proof diesel engine and an oil pump, the explosion-proof diesel engine transmits the oil pump through a coupler, an input port of the oil pump and the oil tank are communicated through an oil path, and an output port of the oil pump and two sets of oil path control valves are communicated through oil paths. Liquid is supplied to the running device and each oil cylinder through the two sets of oil path control valves, the H-shaped supporting leg is arranged at the rear portion of a support of the vehicle body, and the supporting leg is matched with a supporting leg guide rail in a sliding mode.

The invention relates to a remote checking method of an operation circuit. An operator transmits a remote check command to a relay protective device from a remote check center and records the time for transmitting the command; the relay protective device switches to the remote check state, executes corresponding operations according to the received command type, simultaneously uploads switching value information to the remote check center and stores the switching value information to a database; the remote check center comprehensively judges a check result according to the information uploaded by the relay protective device and sends alarm information if the check result is abnormal; and the relay protective device switches to the normal work state after the remote check is finished. By the method, the relay protective checking efficiency is greatly improved, the usability of the equipment can be improved and the overhaul power-failure time is shortened; meanwhile, the invention can avoid the long-journey rushing of relay protection persons during periodic inspection, reduces the check method, and has better generalization value.

The invention discloses an acupuncture moxibustion hot roller. The acupuncture moxibustion hot roller comprises a stone needle, a heating device, an electrotherapy device and a shell, wherein the shell comprises end part shells, a connecting shell and a handle shell; the stone needle is a stone needle sleeve; the heating device is arranged inside the stone needle sleeve and comprises bakelite anda heating coil helically wound on the bakelite; the main body of the electrotherapy device is conductive rubber rings which are arranged on the two ends of the stone needle sleeve; hollow conductive shafts are arranged on the two ends of the bakelite and are also arranged in the centers of the two conductive rubber rings by bearings; conductive copper tubes are arranged on the outer ends of the two conductive shafts and are fixedly arranged inside the approximately U-shaped connecting shell; heating wires are inserted into the conductive copper tubes from the handle shell, extend forward, pass through the conductive shafts and are connected with the heating coil; and electrotherapy wires are connected with the conductive copper tubes in the handle shell. The acupuncture moxibustion hot roller realizes the synchronous action of a plurality of therapies by combining a stone needle therapy with thermotherapy and electrotherapy.

The invention discloses a method and a system for recovering waste heat from IBNA slag washing water of a blast furnace. The system is formed by the connection of a filter, a water pump, a heat exchanger and a matched electric power meter, and the recovering method is that the high temperature slag washing water in a hot water tank is subjected to filtering and pressurizing and then flows into the heat exchanger for heat exchanging with water used by heat consumers. The method and the system have the advantages that short-process INBA slag washing water is high in temperature, and recovering and utilizing effects are good; water qualities of the filtered slag washing water are good, pipelines are protected from being abraded, and the heat exchanger is protected; and the water used by the heat consumers is clean water and is subjected to heat exchanging with the slag washing water by means of the heat exchanger, and the safety and stability of facilities of the heat consumers are guaranteed.

The invention relates to auxiliary mounting equipment, in particular to auxiliary mounting equipment for a construction monitoring sign. The auxiliary mounting equipment for the construction monitoring sign comprises a drill bit and the like. Wheels are arranged on the left and right sides of the bottom of a support correspondingly. A push-moving device is arranged on the support. A fixing plate is arranged on the push-moving device. A motor and a dust suction device are arranged on the left side wall of the fixing plate, wherein the dust suction device is arranged below the motor. A first rotating shaft is connected to the left side of the motor, and the drill bit is connected to the left end of the first rotating shaft. The situation that dust is diffused in air and consequently pollutes the environment can be relieved while drilling is conducted; the direction of a dust suction cover can be changed, so that dedusting is more thorough; discharging of sewage or sludge is accelerated, and the sewage and the sludge are prevented from being adhered to the inner wall of a box body; the auxiliary mounting equipment can be conveniently fixed, thus the safety and stability of the equipment are guaranteed.

The invention provides an obstacle detection device and an omnidirectional vehicle, belonging to the field of vehicle engineering. The obstacle detection device is used for the omnidirectional vehicle and comprises a shell, a visual ultrasonic sensing module, and a visual ultrasonic processing module. The visual ultrasonic sensing module comprises a vision sensor and an ultrasonic sensor. Both the vision sensor and the ultrasonic sensor are arranged on the shell. The vision sensor is used for collecting an image signal of an obstacle. The ultrasonic sensor is used for collecting the ultrasonic signal of the obstacle. The visual ultrasonic processing module is used for receiving and processing the image signal and the ultrasonic signal, and thus obtaining the position information of the obstacle. The omnidirectional vehicle comprises the above obstacle detection device. The obstacle detection device can effectively detect various types of obstacles and thus accurately detect the existence of the obstacle. The omnidirectional vehicle can effectively and accurately avoid the obstacle, thus the damage to the omnidirectional vehicle and an external environment is avoided, and the stability and safety of operation are ensured.