66results about How to "Protect device security" patented technology

The invention discloses a three-phase four-wire system zero-line failure and open-phase intelligent protector. The outputs of a current transformer and a voltage transformer are connected to the input of a range switching module; the range switching module, a data processing module, a CPU logic controller and a drive circuit are connected with each other in sequence; one output switch trip signalof the drive circuit is connected with a switch with an opening coil, and the other output alarm signal is connected with a background management center; and the CPU logic controller is connected with a remote management center or terminal through a communication module. The invention can be used for directly judging whether the zero line goes wrong and transmitting a protection control signal after the failure occurs, so that the switch trips to cut off the failure rear-end power circuit, thereby achieving the goal of protecting equipment and personal safety. Meanwhile, an alarm signal is transmitted to the background management machine to carry out the corresponding treatment, thereby realizing the function of alarm report; and the failure information can quickly make decisions for treating the power-off accident, thereby shortening the power-off time.

This invention relates to a combined control device for integrated instruments and electric appliances composed of a shell with a faulty display window and labels, an electronic control circuit, an intelligent expanding module circuit, a moving and static contactor component with a current sensor at the side of a static contact bridge, an iron core, a coil and a spring, which realizes multiple kinds of protections and fault display by the electronic control circuit and has the function of power saving, a photo electric isolation technology is applied for its high voltage drive and low voltage signal circuit and the I/O expanding interface and an intelligent expansion module are applied to enrich the function of the display and control of the instrument.

The invention discloses a defrosting method of an air source heat pump water heater. The defrosting method is characterized by comprising the following steps: the heat transfer temperature difference and the heat transfer temperature difference change speed are calculated through measuring the environment temperature and the temperature and time of an evaporator coil; the environment temperature, the opening time, the heat transfer temperature difference and the heat transfer temperature difference change speed are compared with defrosting condition set values; when four defrosting conditions are all satisfied, the defrosting signal is sent to realize defrosting through normally closed and normally open contacts of a defrosting relay, start and stop of a fan and a compressor of a control system and opening and closing of a four-way valve or a defrosting bypass electromagnetic valve or a defrosting hot water electromagnetic valve; the defrosting time and the temperature of the coil are compared with defrosting end signal set values; the defrosting end signal is sent; the defrosting end procedure is actuated; and the system recovers normal operation. The defrosting method comprises four-way valve reverse heat pump circulation, or bypass hot air defrosting, or hot water defrosting, or compound defrosting. The defrosting method is accurate in defrosting judgment, clear in logic, cheap in probe, easy for measuring signals and fast and thorough in defrosting, saves the energy, and is suitable for defrosting of all air source heat pump water heaters for sucking air energy to produce hot water.

The invention discloses an electrician training device which comprises an operation platform and an air switch, a voltage meter, a current meter, a power factor meter, a voltage regulator, a current voltage regulator, an isolation transformer, a current raising device, a voltage booster, a voltage mutual inductor, a current mutual inductor, an alternating current contactor, a time relay, a timer, a voltage gear switch, a current gear switch, an electrician metering switching switch, a phase switching switch, a current protection unit, a plurality of control buttons and a connection terminal which are arranged on the operation platform. A meter hanging frame is arranged above an operation platform body. The electrician training device can provide a voltage source, a current source, voltage phase shift and the like, tests and operation can be conducted by electricians after wiring is completed, and the real feeling as that of actual field work is achieved.

The invention relates to a spray apparatus used on a building site, which solves the deficiencies of prior art technology. The technical method involves: the apparatus includes a fog gun water inlet pipeline, a fog gun, a fog gun control unit, a fog gun angular motor, a fog gun angular frequency converter, a fog gun water inlet pipeline pressure transducer, a fog gun water inlet pipeline flow sensor, a booster pump, a booster pump frequency transducer, a booster pump outlet pressure sensor, a water inlet pipeline solenoid valve and a manual control button. The fog gun control unit is in electrical connection with the fog gun angular motor via the fog gun angular frequency transducer, and the fog gun water inlet pipeline is communicated with the fog gun via the booster pump, and the fog gun water inlet pipeline pressure sensor, the water inlet pipeline solenoid valve and the fog gun water inlet pipeline flow sensor are all configured on the fog gun water inlet pipeline. The fog gun water inlet pressure sensor, the water inlet pipeline solenoid and the fog gun water inlet pipeline flow sensor and the fog gun control unit are connected. The manual control button is also connected to the fog gun control unit. The fog gun control unit is in electrical connection with the booster pump via the booster pump frequency transducer.

The invention relates to the technical field of testing equipment and particularly discloses an elevator sliding guide shoe liner testing machine. The elevator sliding guide shoe liner testing machine comprises a work assembling system, a driving system and a control system, wherein the work assembly system is composed of a worktable surface, at least one clamp arranged on the worktable surface for clamping a shoe liner to be tested, at least one loading device for providing sample testing pressure, and at least one wear measurement device for measuring wearing on line and in real-time; the driving system comprises a driving motor, a transmission shaft for power output of the driving motor, and a turntable connected to the transmission shaft, and at least one detachable abrasion piece which can simulate the shape of a guide rail is fixed onto the turntable; the control system is connected with the loading device, the wear measuring device and the driving motor. The elevator sliding guide shoe liner testing machine can achieve comparative test on multiple samples under different testing conditions as well as testing comparison of products to be tested made of different materials or under different loading capacities.

The invention relates to a method and device for clearing a DC line fault of a hybrid multi-terminal DC transmission system. For a DC system composed of a rectifier station and N-1 inverter stations (N is greater than or equal to 3), there are N-2 busbar areas on a DC line for connecting the rectifier station on the head end and the inverter station on the tail end, each busbar area is connected with an intermediate inverter station, when the DC line between two adjacent busbar areas or the DC line between the busbar area on the tail end and the inverter station on the tail end is faulty, theDC system is controlled to be restarted; and if the DC system is restarted unsuccessfully, the inverter station at the downstream of the faulty DC line is locked, and the intermediate inverter stationand the rectifier station on the head end on the upstream of the faulty DC line are restarted. By adoption of the method and device provided by the invention, the power loss during the line fault andthe disturbance to an AC system are reduced, and the fault clearing of the line fault of the hybrid multi-terminal DC transmission system is realized through a specific line fault clearing method, sothat the reliability of the hybrid multi-terminal DC transmission system is improved.

The invention discloses a small vacuum three-target magnetron sputtering coating machine, and relates to a coating machine. The coating machine comprises a vacuum chamber, a machine table, an electrical apparatus control system, an upper cover and three magnetron targets, wherein the machine table supports the vacuum chamber, the electrical apparatus control system and the upper cover of the vacuum chamber are arranged in the machine table, and the three magnetron targets are evenly distributed on the upper cover; the upper cover is connected with two air pressure supporting rods, a suction pipe is arranged behind the vacuum chamber, a throttle valve is arranged in the suction pipe, the rear end of the suction pipe is connected with a molecular pump through a pneumatic gate valve, and an exhaust opening of the molecular pump is connected with a mechanical pump through a corrugated pipe; the three magnetron targets are evenly distributed on the upper cover of the vacuum chamber, and anindependent baffle mechanism is arranged on each target head; a glass observation window is arranged in front of the vacuum chamber; and an introducing interface for auxiliary illuminating is formed in the right face of the vacuum chamber. The small vacuum three-target magnetron sputtering coating machine is of an integrated structure and can work by being externally connected with water, electricity and gas, and users only need to set a plurality of parameters such as the coating time and put samples and take samples so that the coating machine can operated fully automatically.

The invention relates to a digital twin substation anti-misoperation system, which comprises an equipment monitoring unit, a personnel monitoring unit, an Internet of Things base station and a management background, and is characterized in that the monitoring unit is used for collecting power equipment data, environment data, real scene data and image data of a plurality of monitoring points in real time; the personnel monitoring unit collects movement paths, identity recognition and vital sign related data of personnel in the transformer substation in real time; the Internet of Things base station is used for receiving, transmitting and transmitting real-time data streams; and the management background is used for docking and processing the acquired data flow and judging whether the electrical equipment of the transformer substation runs abnormally, and the management background can establish a 3D model, divide a working area and a non-working area and generate operation ticket information. According to the invention, integrated monitoring and unified management are formed, personnel are trained and simulated, personnel working routes are planned, the operation and maintenance cost is low, layered display and mistake prevention can be realized, the five-prevention capability of a transformer substation is promoted, electrical equipment and personal safety are protected, and stable and safe operation of a power grid is ensured.

The invention relates to a high-efficiency direct drive type pumping unit with a single movable pulley and a single fixed pulley. The high-efficiency direct drive type pumping unit comprises a tower which is fixed on a cement foundation. A platform welding rack is fixed at the top of the tower. The upper platform of the platform welding rack is provided with a motor, a driving wheel, a guiding seat and a guiding arm. According to the high-efficiency direct drive type pumping unit, a direct motor driving manner is used. Furthermore a sucker rod and a counterweight end are respectively provided with a fixed pulley assembly and a movable pulley assembly. A requirement for a motor torque is greatly reduced, thereby reducing cost, facilitating maintenance and improving the integral operation efficiency of the pumping unit. Furthermore the high-efficiency direct drive type pumping unit is provided with a winch first steel band, and therefore automatic elevation of a counterweight can be realized and dodging and resetting of a front guiding arm can be easily performed, thereby realizing more convenient well maintenance. Furthermore a drawer type structure is adopted for dodging and resetting of the guiding arm, thereby realizing higher safety.

The invention discloses a delay control circuit of a DC motor. The delay control circuit of the DC motor comprises a driving power module, a battery charging-discharging module, a motor driving module and a control module MCU; the driving power module is used for converting AC into a DC power supply which is regulated down and stabilized to be 12V; the battery charging-discharging module capable of charging and discharging a battery comprises a charging circuit, and a delay discharging circuit controlled through the MCU, and the battery charging-discharging module discharges to supply power to the motor driving module; the motor riving module is used for controlling a three-phase motor to work; the three-phase motor is controlled through six signals of the MCU, wherein the six control circuits are supplied by an internal circuit of the MCU. The delay control circuit of the DC motor has the function of charging and discharging the battery, so that the motor delaying work can be done without an external power supply, and the motor delaying work can be achieved even after the external power supply is switched off; therefore, devices can be effectively cooled to ensure the safety; the delay control circuit is simple, the energy consumption is low, so that the cost is effectively decreased, and a user can use conveniently.

The invention discloses an electricity leakage protection method. The method includes S1, a user sets specific triggering conditions and checks whether an electricity leakage switch is switched on or not, executing S2 if the electricity leakage switch is switched on and ending the whole electricity leakage protection process is the electricity leakage switch is switched off; S2, a control terminal DCU performs polling on an electricity leakage detection module and compares an electricity leakage information value with an electricity leakage protection threshold value set in S1; S3, when the electricity leakage protection threshold value is triggered, a loop protection process is started according to the specific triggering conditions and electricity leakage log is recorded; S4, the user performs troubleshooting on a loop having electricity leakage through checking the electricity leakage log. According to the invention, polling is performed on the electricity leakage detection model by the control terminal DCU and processing of loop electricity leakage information is carried out, and power source protection actions are executed; the user checks the electricity leakage log, so that troubleshooting for electricity leakage becomes more accurate and convenient; loss caused by electricity leakage troubleshooting is reduced; and equipment and human safety are protected.

The invention discloses a comprehensive fault control method for a polymorphic power quality management device, which includes the following steps: a controller detects the DC bus voltage of a power unit, the terminal voltage of the energy storage battery group of the power unit, the output current of the power quality management device and the fault marker information of the power unit controllerto determine whether the polymorphic power quality management device fails or not; and layered and graded processing is carried out according to different types of faults. Thus, stable and reliable operation of the power quality comprehensive management device is realized.

The invention discloses an anti-explosive valve which is formed by unit valve bodies (1) combined together. The surface of each unit valve body (1) is provided with an air outlet (2); a bottom plate (3) is arranged in the unit valve body (1); a slide block (4) is arranged on the bottom plate (3); and the slide block is elastically connected with the bottom plate (3). With the structure, the invention can prevent explosive shock waves from entering the inside of a building from the air outlet while meeting the requirement of ventilation, thereby protecting indoor people and equipment.

The invention discloses a VOC dynamic gas distribution instrument, which comprises a case, wherein a seven-inch display screen is arranged on the upper portion of the front panel of the case, a humidifier is arranged on the upper portion of the rear panel of the case, a mass flow meter and a pressure sensor are arranged on a middle plate in the case through a fixing bracket, hole limiting boxes are mounted on the mass flow meter and the pressure sensor, the hole limiting boxes are connected with a 1/8 penetrating plate, a switching power supply 5, a circuit board and a fan are arranged on one side of a vertical partition plate on the lower portion in the case, a GO valve and a mixing bin are arranged on the other side of the vertical partition plate C, the GO valve is connected to the mass flow meter through a 1/8 three-way joint, and the mass flow meter is connected to the interior of the humidifier through the 1/8 penetrating plate. The VOC dynamic gas distribution instrument is reasonable in structural design, convenient to maintain and operate, capable of being provided with substances such as PAMS standard gas, internal standard gas, oxygen-containing standard gas and the like, capable of meeting the requirement for measuring the volatile organic compounds in the atmosphere, attractive and elegant in overall appearance, convenient and reliable to use, capable of saving manpower, high in safety and high in practicability.

The invention discloses a remote online testing device and method for insulation data of mining electrical equipment. The remote online testing device for insulation data of mining electrical equipment comprises a high-voltage direct-current power supply module, a signal acquisition module, a high-voltage measurement module and a control processing system, and the high-voltage direct-current powersupply module is electrically connected with tested equipment, the signal acquisition module and the high-voltage measurement module and supplies power to the tested equipment and the signal acquisition module. The device can carry out remote (local) insulation detection on equipment and lines at any time, exclude insulation detection blind area, and find out and forecast insulation data change reduction in advance. Electric leakage caused by poor insulation performance is reduced to the maximum extent, the effect of protecting line equipment and personal safety is effectively achieved, manual operation is replaced with mechanization, the detection accuracy is improved, the service life of the equipment is prolonged, and the influence of faults on productivity is reduced.

The invention discloses an anti-virus router, a system and a method thereof, wherein the anti-virus router comprises a physical layer processing module and a data link layer module, between which a neural network module is connected for performing virus identification on a data frame from the physical layer processing module, and sending the virus identification result to the data link layer module. On the premise of guaranteeing the volume and power consumption of the original router, the invention performs real-time monitoring on the network information passing through the router and recognizes the virus information therein so as to protect the security of the user information, and has the advantages of low power consumption, high efficiency and good instantaneity.

The invention provides a rotary mechanism of a spittoon for a dental unit. The mechanism is provided with a spittoon motor and a supporting base which are fixedly arranged on a top plate of a box body, wherein a pinion is arranged on an output shaft of the spittoon motor, the upper end of a transmission shaft and the lower end of a rotary shaft of the spittoon are connected and then jointly supported in the supporting base by virtue of a bearing, the upper part of the rotary shaft of the spittoon extends out of the supporting base and two limiting switches with an included angle of 90 degrees are arranged on the outer circumference of the upper part of the supporting base, a cam which is contacted with the limiting switches when the rotary shaft of the spittoon rotates is arranged on the part, which is exposed out of the supporting base, of the rotary shaft of the spittoon, a rack wheel engaged with the pinion is adsorbed at the lower end of the transmission shaft by virtue of a magnet, and the upper end of the rotary shaft of the spittoon is fixedly connected with the spittoon. According to the mechanism provided by the invention, by means of dynamic drive and magnetic absorption effect between the rack wheel and the transmission shaft, the transmission motor rotates to realize self-rotation of the spittoon or transmission is disabled by means of a slip phenomenon between the rack wheel and the transmission shaft, so that manual rotation is realized and the equipment safety is protected.

The invention discloses a laboratory isolation power supply insulation fault location system, which includes an isolation transformer and a test bench; the isolation transformer is sequentially connected in series with an insulation monitor and an external alarm, the external alarm is also connected with an alarm display, and the test bench is connected with a test In the control room, the test console is connected with the insulation monitor; the isolation transformer is also connected in series with the insulation fault tester and the insulation fault locator through the current transformer; the test bench includes several load circuits connected in parallel with the insulation fault tester, and the load circuit All are also equipped with switches and positioning transformers, and the positioning transformers on the load circuit are all connected to the insulation fault locator. The invention can quickly send out an alarm and locate a fault when a fault is found, provides a safe experiment platform for experimenters, protects personal safety and equipment safety, and has a certain improvement effect on teaching.

The invention discloses a steel structure antirust process. The antirust process includes the following steps of firstly, surface treatment, wherein rust, oxide skin and infirmly-attached old paint film attachments on a metal surface are removed through a wire brush, a scraper knife, abrasive paper and grinding wheel mesh; secondly, preparation of paint, wherein before the paint is prepared, uniform stirring should be performed, use cannot be performed until crust or other debris is removed, and the prepared paint needs to be sufficiently and uniformly stirred and applied on trial; thirdly, the coating method of the paint, wherein the mechanical spraying and brushing combined method is applied for the implementation of the coating method, mechanical spraying is adopted for large components, and brushing is adopted for small components; and fourthly, coating of the paint. The implementation process is simple, a steel structure is resistant to rust and fire, the strength of the steel structure is ensured, personal and equipment safety is protected, the service life of the steel structure is prolonged, and economic investment is reduced.