7results about How to "Complete protection functions" patented technology

The invention discloses an intelligent panel type fire-fighting voltage-stabilizing control system which comprises a power supply loop, a main loop, a secondary control loop, a voltage-stabilizing pump controller and a signal acquisition module which are arranged in a fire-fighting cabinet, the power supply loop adopts a three-phase four-wire system power supply inlet wire, the main loop comprises two groups of alternating current contactors, a thermal relay and a water pump motor which are sequentially connected in series, the secondary control loop comprises a controller fuse, an intermediate relay and an indicator lamp, and the stabilized voltage pump controller is provided with a MicroSD card to record working state data. The signal acquisition module comprises a pipe network pressure transmitter, a water tank liquid level transmitter and a float switch; by integrating the intelligent control module and optimizing the circuit structure, the problems of low integration level, poor automation degree and insufficient reliability of the existing fire-fighting voltage-stabilizing control system are solved, and the fire-fighting voltage-stabilizing control system has the advantages of high flexibility, complete protection functions, high intelligence degree, strong communication capability, high integration level, safety, energy conservation and high precision; the method can be widely applied to fire-fighting water supply pressure-stabilizing control scenes of various buildings.

The application discloses a broadcast transmitter switching device and a switching method thereof, and the switching device comprises a mechanical carrier and a control unit; the mechanical carrier comprises a cabinet body, a resistor body framework and a fan support are arranged in the lower part of the cabinet body, a first resistor body and a second resistor body are arranged on the resistor body framework, a first fan and a second fan are arranged on the fan support, a first partition plate is arranged on the upper part of the resistor body framework, an external interface plate is arranged on the first partition plate, a second partition plate is arranged in the upper part of the cabinet body, a coaxial converter is arranged on the upper part of the second partition plate, an emergency support is arranged on the lower part of the second partition plate, a front door and a back door are arranged on the cabinet body, a switch, an indicator lamp and a high-frequency power meter are arranged on the front door panel, and the external interface plate and the emergency support are arranged on the inner side of the back door. The application can be effectively applied to the switching of the broadcast transmitter, stable and efficient switching between the main machine, the standby machine, the transmitting antenna and the dummy load can be realized, the performance is stable and reliable, the market prospect is wide, and the application is convenient to popularize and use.

The utility model relates to a vehicle-mounted radio antenna power supply circuit, which comprises a capacitor C01, a capacitor C02, a capacitor C03, a resistor R01, a resistor R02, a resistor R03, a resistor R04, a resistor R05, a resistor R06, a triode Q01, a field effect transistor Q02, an inductor L01, an inductor L01, an inductor L02, a diode D01, a diode D02, a bidirectional diode D03 and a thermistor PTC1. The circuit adopts simple triodes, field effect transistors, resistors, capacitors and other elements, does not need a special chip, reduces BOM cost, and has a perfect protection function and stable power supply capability.

The invention belongs to the technical field of power supply management, and particularly provides an alternating current and direct current power supply isolated output switching device, which comprises a power supply input and preprocessing module used for accessing an alternating current main power supply and a direct current standby power supply and performing preprocessing protection on the two power supplies respectively; the power supply detection and control module is used for acquiring electrical parameters of the alternating-current main power supply and the direct-current standby power supply in real time, judging a power supply state of the power supply according to an acquisition result and outputting a control signal; the relay isolation switching module comprises two relays respectively corresponding to the main power supply branch and the standby power supply branch, and realizes physical isolation and automatic switching of the AC / DC power supply based on the control signal; the output adaptation and protection module is used for providing a corresponding output branch according to the load type and protecting an output power supply; wherein the two relays adopt an interlocking design to ensure that the two relays are not conducted at the same time.

The utility model provides an auxiliary mounting jig for vertically hanging an anode hanger. The auxiliary mounting jig comprises an outer frame, a base, a slide rail, rollers, a lower hanger, an upper hanger and other main components. The outer frame serves as a main body supporting structure, the sliding rail is installed in the outer frame, and the base can slide along the sliding rail. The lower hanging frame is arranged in a groove of the base, the upper hanging frame is arranged above the lower hanging frame in parallel at intervals, and accurate alignment is achieved through the positioning bottom block and the lower hanging positioning column. The rolling wheel is in rolling contact with the upper hanging frame, the shifting piece is clamped with the annular groove of the lower hanging positioning column through the clamping groove, and stable installation of the upper hanging frame and the lower hanging frame is achieved. The jig is further provided with auxiliary structures such as a sliding rail organ cover, a stopping block, a guide strip, a clamping assembly, an illuminating lamp and a handle, and the operation convenience, stability and safety are further improved. The anode hanger can be quickly and accurately mounted, the production efficiency is remarkably improved, and the anode hanger is suitable for anodic oxidation treatment of workpieces such as mobile phone middle frames in the electroplating industry.

The application discloses a child electric off-road vehicle frame, which comprises a bottom plate, a main frame mounted on the top of the bottom plate, a main body frame of the main frame being a triangular truss structure composed of hollow pipes, a plurality of reinforcing pipes arranged on the main frame, a front anti-collision fence and a rear anti-collision fence arranged at the front end and the rear end of the bottom plate respectively, two parallel slide grooves formed in the center of the top of the bottom plate, and accommodating holes formed in the two inner walls of the slide grooves in the length direction; an anti-collision damping mechanism arranged in the slide grooves and the accommodating holes, comprising a damping spring, a contact rod and a sliding block, the spring being assembled in the accommodating hole, one end of the contact rod being fixed on the damping spring, the sliding block being arranged in the slide groove, the other end of the contact rod being in abutment with the sliding block, and the two sliding blocks being integrally formed on the same seat mounting plate; the anti-collision damping mechanism can play a role of shock absorption and impact force absorption when the off-road vehicle is subjected to a transverse impact.

The utility model provides a portable programmable power supply for maintenance and support of avionics equipment. The portable programmable power supply comprises a programmable adjustable DC voltage stabilization module, an assembled battery, a DC voltage stabilization module, an intelligent charging module and an assembled battery protection module. When the avionics equipment is maintained indoors, the program-controlled adjustable direct-current voltage stabilizing module supplies power to the avionics equipment and the measurement and control host and charges the assembled battery through electric energy provided indoors, and when the avionics equipment is maintained outdoors, the program-controlled adjustable direct-current voltage stabilizing module receives the electric energy provided by the assembled battery and charges the assembled battery through the program-controlled adjustable direct-current voltage stabilizing module. And a working power supply is provided for avionics equipment and a measurement and control host. Charging of the assembled battery is protected through the direct current voltage stabilization module and the intelligent charging module, and the assembled battery is controlled and protected through the assembled battery protection module. Through the scheme, the flexibility and reliability of the power supply can be improved, the power supply requirements of indoor and outdoor avionics equipment are met, and the safety, stability and high efficiency of the battery in the charging and discharging process can be ensured.