65results about How to "Safe working condition" patented technology

The invention discloses a synchronous control device of double winches, wherein a hook is connected with the double winches by a hook component, the synchronous control device comprises an angle signal acquisition part and a controller, wherein the angle signal acquisition part is used for acquiring the gesture angle of a frame of the hook component, the controller outputs a synchronous control signal to a drive mechanism / drive mechanisms of one or both of the double winches according to the gesture angle of the frame of the hook component, so as to control the gesture maintaining level of the frame of the hook component. According to the synchronous control device of the double winches, the frame of the hook component is kept at a horizontal gesture to improve the working stability of the whole machine. On the basis, the invention further provides a synchronous control method of the double winches and a crane applying the synchronous control device.

The invention relates to a vessel having an elongated shape, and being moored to the sea bed in a substantially fixed orientation. The vessel comprises at least along its longitudinal sides, near keel level, two transverse skirts having such a width that the natural roll period of the vessel is above a predetermined period, the natural roll period of the vessel without the skirts being below said predetermined period.

The invention provides a fuel cell air system decoupling control method. The method comprises the following steps of determining corresponding target air pressure and target air flow according to a working point of the fuel cell, checking the corresponding calibration tables through the target air pressure and the target air flow, and acquiring the feed-forward throttle valve opening degree and the feed-forward air compressor rotating speed, acquiring real-time air in-pile pressure and air in-pile flow, calculating the difference value between the target air pressure and the air in-pile pressure, conducting PID control on the pressure difference, and acquiring a throttle valve opening adjustment value, checking a calibration table for correcting the corresponding opening degree to the rotating speed according to the opening degree of the feed-forward throttle valve and the opening degree adjustment value of the throttle valve to obtain a rotating speed correction value of the air compressor, calculating the difference value between the target air flow and the air in-pile flow, conducting PID control on the flow difference, and acquiring the rotating speed adjustment value of the air compressor, checking a calibration table for correcting the opening degree by the corresponding rotating speed according to the feedforward air compressor rotating speed and the air compressor rotating speed adjusting value to obtain a throttle valve opening degree correction value, summing to obtain the final opening degree of the throttle valve, and summing to obtain the final rotating speed of the air compressor. The method is simple and easy to implement, high in practicability and high in accuracy.

The invention relates to an intelligent numerical-control engraving machine controller which comprises a power section, a main-control microprocessor and a plurality of motor driving modules. The power section powers circuits of all parts, the output end of the main-control microprocessor is connected with the motor driving modules which are provided with output ports directly connected with motors, the main-control microprocessor is connected with data transmission interface modules and a display screen, numerical-control code files are transmitted to the main-control microprocessor through the data transmission interface modules, the main-control microprocessor is provided with an instruction execution module which is capable of reading the numerical-control code files inputted externally and reading, analyzing, calculating, judging and converting instructions and parameters in the numerical-control code files and displaying relevant information on the display, and codes capable of being directly executed on a numerical-control engraving machine are generated. By the arrangement, data can be automatically processed, work can be automatically arranged, cost is relatively low, and safety is higher.

The invention discloses an electric vehicle lighting device based on wind power generation. The electric vehicle lighting device based on wind power generation comprises an electric vehicle headstockshell and shielding outer edges; a vehicle lamp is installed on the front side of the electric vehicle headstock shell; a protective ring is fixed to the outer side of the vehicle lamp; ventilation openings are formed in the lower sides of the shielding outer edges; ventilation dustproof nets are fixed in the middles of the ventilation openings; power generation shells are connected to the inner sides of the ventilation openings and internally provided with rotary rods; power generators are connected to the rear ends of the rotary rods; connection bases are arranged on the rear sides of the power generators; the outer sides of the rotary rods are connected with fixed rods through rotary bearings; the power generation shells are fixed to the two ends of the fixed rods; and exhaust outlets are formed in the junction positions of the power generation shells and the connection bases. The electric vehicle lighting device based on wind power generation is provided with the rotary rods, the power generators and wind blades, wind energy can be used for generating power, then the needed energy source is provided for the vehicle lamp, power consumption of an electric vehicle is reduced, andthe wind energy utilization rate of the electric vehicle is improved.

The invention discloses a locker for a mobile radar antenna pedestal. The locker comprises a base, a taper pin boss, a shell, a first approach switch, a second approach switch, a cam mechanism, a knobdevice and a button device, wherein the base and the taper pin boss are a main body structure of the locker; the base and the taper pin boss are oppositely arranged; the shell is arranged on the base; the cam mechanism is arranged in the base and the shell; the knob device is arranged on a cam; the button device is connected to the inner side surface of a knob through a guide threaded pin; the cam is fixedly connected with a taper pin through a connecting rod and an adapter; the knob device and the cam synchronously rotate and drive expansion of the taper pin, thereby completing locking and unlocking actions between the base and the taper pin boss; the first approach switch is arranged at one side of the base; the second approach switch is arranged at one side of the taper pin boss; and alocking in-place signal and an unlocking in-place signal of the locker are provided through on / off of the approach switches. The locker is high in reliability and simple in operation.

The invention discloses an intelligent battery connector. The intelligent battery connector comprises a needle-shaped connector, an electromagnet surrounding the outer side of the needle-shaped connector, a bidirectional connector, a permanent magnet surrounding the outer side of the bidirectional connector, and a lead wire, wherein the needle-shaped connector is connected to two electrodes of each battery in a battery pack; the bidirectional connector is provided with two connecting points; one side of the bidirectional connector is connected with a rear battery in two adjacent batteries or the other side of the bidirectional connector is connected with a next-stage battery; the electromagnet comprises a current reversal apparatus; the current reversal apparatus is controlled by a battery management system of a battery system; and a current direction is changed through the current reversal apparatus to change an electrode of the electromagnet. According to the intelligent battery connector, bad batteries connected in series can be disconnected according to a detection result of the battery management system to the batteries, so that the whole battery pack is ensured to be in a safe working state.

The invention discloses a heat pump drying device and an application method thereof. The heat pump drying device comprises a heat pump circulation subsystem and a drying circulation subsystem. A compressor, a heat adjustment device, a condenser, a throttling component, an evaporator and a precooling heat exchanger are connected through a pipeline, so that the heat pump circulation subsystem is formed. The drying circulation subsystem comprises a drying chamber, an air channel and a drying fan. The drying fan, the precooling heat exchanger, the evaporator and the condenser are mounted in the air channel, or air inlets of the drying fan, the precooling heat exchanger, the evaporator and the condenser and air outlets of the drying fan, the precooling heat exchanger, the evaporator and the condenser are connected with a front air channel body and a rear air channel body correspondingly. The drying chamber or the air channel body adjacent to the drying chamber is internally provided with atemperature sensor and a humidity sensor. By means of the heat pump drying device and the application method thereof, the problems that existing drying devices are small in function number, small in drying application scope, high in energy consumption, loss and emission and the like are solved; functional diversity and high efficiency of a drying system are achieved; the application scope is widened; damage of dried objects and emission of exhaust gas are reduced; and flexibility and reliability of the heat pump system are improved.

The invention relates to a manufacturing method of a heat exchanger tube and a heat exchanger device; the heat exchanger device comprises a shell (10) and a heat exchanger tube (20); the heat exchanger tube (20) is made of non-ferrous metals, the surface of the heat exchange area (21) of the heat exchanger tube (20) is provided with raised heat radiation fins (23), the outer surface of the heat exchanger tube (20) is covered with a heat conductive insulation thin layer (30) made of inorganic materials. By adopting the technical proposal, the invention improves the traditional heating elements and heating devices, has stable and safe operating condition, prolongs the service life of heating devices, reduces production cost and application cost and enhances heating efficiency by enlarging heat radiating area; the technology can be widely applied to the industries like petroleum, chemical engineering, medicine, food, textile, printing and dyeing, rubber processing, etc.

The invention discloses a contactor, a contactor assembly and a control circuit. The contactor comprises a switching mechanism, an iron core and an iron core position measurement circuit, wherein the iron core position measurement circuit comprises an excitation signal generating circuit and a sensing circuit; the sensing circuit judges the position of the iron core according to different inductance values; the control circuit is used for controlling an operation of the contactor; the contactor comprises the switching mechanism and the iron core; a coil surrounds the iron core to drive the iron core to carry out a back-and-forth movement, so as to connect or disconnect a work loop; and the control circuit comprises a work control circuit, the iron core position measurement circuit, the controller and the like. According to the control circuit disclosed by the invention, the position of the iron core is measured by measuring the variation of inductances by the characteristic that the coil generates different inductances due to different positions of the iron core in the coil.

The invention discloses a continuous bleed air system based on a turbojet engine. The bleed air system at least includes a gas collecting ring, and the gas collecting ring is sleeved on the outside of the pressure stabilizing section of the turbojet engine, and the pressure stabilizing section A number of air-introduction windows are uniformly arranged on the side wall between the gas-collecting ring; two air-introducing units for leading out compressed gas are arranged on the gas-collecting ring, and the air-introducing units include The bleed air pipe on the side wall of the gas collecting ring, the bleed air mass flow measuring equipment and the bleed air mass flow control equipment arranged in the bleed air pipe. In the present invention, by modifying the engine pressure stabilizing section, adding gas collecting rings, temperature and pressure sensors, mass flow measurement and control equipment, and engine exhaust temperature detection equipment, on the premise of ensuring the safe working state of the engine, it continuously provides controllable compressed gas. The bleed air system is small in size, low in cost, does not need an additional power device, and is convenient to be integrated inside the aircraft.

The invention discloses a building cutting machine capable of conducting conversion cutting on the wall surface and the ground. The building cutting machine comprises a main handle and a protection shell. A cutting blade is mounted on the inner side of the protection shell, and the outer side of the protection shell is provided with a scale line, a positioning plate and sliding grooves; the positioning plate is arranged on the sliding grooves, and the scale line is arranged in the middle of the positioning plate; a water-spraying electromagnetic valve is fixed to the upper side of the protection shell, and the outer side of the water-spraying electromagnetic valve is connected with a water-guiding hose; and a main moving rod and an auxiliary moving rod are connected through a connecting bottom plate, and fastening bolts are mounted on the connecting bottom plate. According to the building cutting machine capable of conducting conversion cutting on the wall surface and the ground, corresponding adjusting work can be conducted on different working faces of a building, and accordingly, cutting work on the different working faces of the building is completed; and the size of cutting work can further be controlled effectively in the cutting process, and thus the cutting work error of the device is reduced effectively.

The invention relates to a strong and weak current comprehensive distribution box. The strong power distribution room and the weak power distribution room which are isolated from each other are arranged in the cavity of the box body. The box door is composed of an isolated inner door and a visible outer door. Mirror frame type, the left and right vertical frame plates and the upper and lower vertical frame plates of the box shell assembly are provided with knock-out holes for incoming and outgoing lines, the rear floor of the strong power distribution room is equipped with installation guide rails for strong power distribution facilities, and the rear floor of the weak power distribution room is set There are installation brackets for multimedia signal modules, and there are extension holes for operating functional parts of power distribution facilities on the door of the strong power distribution room. The incoming and outgoing lines of all power distribution facilities enter and exit through the knock-out holes, and can be monitored through the door The indoor setting content and working conditions are reasonable and scientific in structure, integrating strong and weak power distribution functions, which is convenient for the setting of multimedia weak current supporting facilities and the reasonable layout of signal lines, which is conducive to standardizing outdoor incoming lines and indoor wiring, and improving indoor The overall decoration effect effectively overcomes the messy wiring of weak current facilities or the arrangement of multiple boxes in the prior art, which is not coordinated with the interior decoration, and has strong practicability and market application prospects.

The invention discloses a mechanical clamping claw capable of extracting and preventing objects different in size from falling. The mechanical clamping claw includes a connecting rod, first lining plates and fixed pulleys; clamping claw plates are installed on the inner side of a device body, and protective shields are fixed to the outer sides of the clamping claw plates; a limiting block is arranged on the lower side of the interior of the device body, a second motor is fixed to the inner side of each protective shield, and a lining plate housing is fixed to the outer side of each second motor; a second lining plate is arranged on the inner side of each lining plate housing, the outer side of each second lining plate is connected with the corresponding second motor through a third gear, the two sides of each second lining plate are connected with the corresponding lining plate housing through movable pulleys, and the first lining plates are connected to the outer sides of the fixed pulleys. Since the mechanical clamping claw capable of extracting and preventing the objects different in size from falling is provided with the first lining plates, the use safety performance of the whole clamping claw is improved; through arrangement of the second lining plates and lining plate teeth, the use efficiency of the clamping claw is improved, and the use functions of the clamping claw are increased.

The present invention proposes an equivalent adjustment circuit for gate drive resistance of an IGBT module, comprising an IGBT module, an MCU, a first optocoupler and a drive module, a first resistor is connected between the MCU and the first optocoupler, and the drive module and the IGBT module A gate drive resistor is connected between them, and there is an integral circuit between the first optocoupler and the drive module. The integral circuit includes the equivalent resistance of the integral circuit and the first capacitor. By changing the resistance value of the equivalent resistance of the integral circuit, the integral circuit can be adjusted The time constant of the gate drive resistor can be adjusted equivalently. The equivalent adjustment circuit of the gate drive resistance of the IGBT module of the present invention can adjust the equivalent resistance of the gate drive resistance, and can drive IGBT modules with different powers without manually changing the gate drive resistance, thereby optimizing the working state of the IGBT modules.

The invention discloses a vehicle fault handling method of hydrogen energy vehicles. The method includes the following steps: S1, performing fault detection on components whose functions can be replaced and the components whose functions cannot be replaced; S2, sending component fault grades to a vehicle controller; S3, calculating and processing each component according to the fault grades; S4, sending the component fault grades to the vehicle controller; S5, calculating vehicle fault grades; and S6, performing vehicle fault handling. The method can detect a fuel cell and a hydrogen storage system while detecting a motor controller, a distribution box and other products, and an auxiliary power supply is also considered, so that a vehicle can be in a safe and reliable working state; and the vehicle components can be divided into products with replaceable functions and products with non-replaceable functions according to the functions, and fault detection can be respectively performed on the products with replaceable functions and the products with non-replaceable functions.

The invention discloses a railway power transmission device which mainly solves the problems that in existing railway power transmission, small current signal detection cost is high, and sensitivity adjustment is inconvenient. The device comprises a feeder circuit breaker arranged in a traction substation for railway power supply, a relay protection device and a power transmission line which are connected with the feeder circuit breaker, a power taking coil for taking power from the power transmission line through a traction network power supply arm, a protection circuit, a rectification circuit, a voltage conversion circuit and a power output circuit which are sequentially connected with the power taking coil, and a small current signal generation detection circuit connected with the protection circuit. By means of the design, the power transmission state of the power transmission device is judged by analyzing the small current signals, what is guaranteed is that the power transmission device is in a safe working state, and the detection sensitivity of the small current signal generation detection circuit can be conveniently adjusted through adjustment of the potentiometer. Therefore, popularization and application are facilitated.