30results about How to "Less prone to impact damage" patented technology

The invention discloses a telescopic hidden fire hydrant based on the Bernoulli principle. The telescopic hidden fire hydrant comprises a shell, and an opening and closing mechanism, a high-pressure pipe network and a telescopic water outlet mechanism are arranged in the shell; the shell comprises a main shell body, an upper shell body and a closed shell body; the main shell body, the upper shellbody and the closed shell body are matched to form a cavity for containing the fire hydrant; the telescopic water outlet mechanism is used for providing a water source for fire fighting equipment, andis arranged to be switched between a stretching water outlet state and a retracted water stopping state; the opening and closing mechanism is used for controlling the telescopic water outlet mechanism to be switched between the stretching state and the retracted state, and is arranged to be switched between an open state and a closed state; the high-pressure pipe network is arranged between the opening and closing mechanism and the telescopic water outlet mechanism, one end of the high-pressure pipe network is connected with the opening and closing mechanism, and the other end of the high-pressure pipe network is connected with the telescopic water outlet mechanism; the high-pressure pipe network is used for introducing water flow and controlling the telescopic water outlet mechanism through the opening and closing mechanism.

The invention discloses a proportion electromagnet motion response time and speed measuring device; a relay is used for controlling to open / close an electromagnet power supply; a reference signal sampling circuit is used for recording an electromagnet excitation signal; a vibration signal sampling circuit is used for acquiring a vibration signal of a vibration sensor; a recorder has two channels,the reference signal sampling circuit is connected with the first channel, the vibration signal sampling circuit is connected with the second channel, the recorder sends the acquired two path signalsto a central processor, and a host computer can display and analyze a signal curve; a single-chip microcomputer emits a step pulse signal, and controls the relay and the recorder to work. The invention also discloses a proportion electromagnet motion response time and speed measuring method; the measuring device and method can effectively detect the electromagnet motion response performance, thusproviding basis for quantitative analysis of different types, batches of electromagnets and individual electromagnets.

The invention discloses a fire hydrant contraction concealing and self-stretching high-pressure water jet method. The method includes steps: in a stretching stage, a first valve is turned on to allowwater to flow into a transition cavity, and water flow contacts with a positioning conduction mechanism and pushes a second firefighting vertical pipe to move along the center axis of a first firefighting vertical pipe from a water inlet end of the first firefighting vertical pipe to a water outlet end of the first firefighting vertical pipe; in a transition stage, a second valve is turned off, the second firefighting vertical pipe stops discharging water but is still in the stretching stage; in a contraction stage, the first valve completes transition and is in a closed state, water flows into a storage cavity, water flow contacts with the positioning conduction mechanism and pushes the second firefighting vertical pipe to move along the center axis of the first firefighting vertical pipefrom the water outlet end of the first firefighting vertical pipe to the water inlet end of the first firefighting vertical pipe, the positioning conduction mechanism is separated from a limiting mechanism, a trigger rod is separated from an inner limiting step, a second valve core moves upwards under the elastic force of a first spring, and a first drainage hole is sealed by the second valve core.

The invention discloses a water-saving anticorrosion fire hydrant based on Bernoulli's principle, comprising a base arranged below the surface, an inflow valve arranged on the base, a water supply network, and a telescopic hydrant body; the inflow valve is used for controlling connection and disconnection between the telescopic hydrant body and an urban water supply pipeline; the water supply network is arranged between the inflow valve and the telescopic hydrant body and is used for conducting a high-pressure water flow; an opening-closing mechanism includes a mounting frame arranged on the base; an opening-closing component is arranged at the top of the mounting frame; a driving mechanism that drives the opening-closing component to switch between an opened state and a closed state is arranged between the base and the telescopic hydrant body; the driving mechanism is connected with the driving end of a first transmission mechanism, the output end of the first transmission mechanism is connected with the driving end of a second transmission mechanism; the output end of the second transmission mechanism is connected with the driving end of the opening-closing component, wherein when the inflow valve is in the opened state, connector II is communicated with connector III, and connector I is communicated with connector IV; when the inflow valve is in the closed state, the connector II is communicated with the connector IV, and the connector I is communicated with the connector III.

The invention discloses an extensible fire hydrant based on fluid dynamic regulation and control. The extensible fire hydrant comprises an extensible water output mechanism used for providing a watersource for a fire fighting apparatus and arranged to be switched between an extensible water output state and a retractable water stop state. The extensible water output mechanism comprises a second valve and an extensible water output pipe, wherein the extensible water output pipe can be switched between an extensible state and a retractable state, and the second valve is used for controlling water output and water stop of the extensible water output pipe in the extensible state. The extensible water output pipe comprises a high-pressure water outlet pipe I and a high-pressure water outlet pipe II, wherein a water accommodating cavity is formed between the high-pressure water outlet pipe I and the high-pressure water outlet pipe II, a limiting device is also arranged between the high-pressure water outlet pipe I and the high-pressure water outlet pipe II and is used for preventing the high-pressure water outlet pipe II from breaking away from the high-pressure water outlet pipe I in the movement process, and the high-pressure water outlet pipe I and the high-pressure water outlet pipe II are communicated when the high-pressure water outlet pipe II moves to the limiting device.