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

The invention relates to carbon dioxide laser devices, in particular to an output lens cooling device of a carbon dioxide laser. The output lens cooling device comprises an inner sleeve (1) and an outer sleeve (2) which are coaxially arranged, a base plate (3) is arranged between the inner sleeve (1) and the lower end of the outer sleeve (2), a flowing path (4) is formed between the inner sleeve (1) and the outer sleeve (2), an inlet tube (5) and an outlet tube (6) are arranged on a lateral wall of the outer sleeve (2), the inlet tube (5) and the outlet tube (6) are communicated with the flowing path (4), and the output lens cooling device is characterized in that the upper end of the flowing path (4) is opened, a cover plate (7) for sealing the flowing path (4) is arranged at the upper end of the outer sleeve (2), and a groove (11) is arranged on a lateral face of the cover plate (7). The output lens cooling device of the carbon dioxide laser separates the cooling device into two portions, the flowing path (4) is covered by the cover plate (7), processing and manufacture can be conveniently carried out, and accordingly the cooling device can be produced in mass.

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 shrinkage sheltering and self-stretching high pressure water spraying method for a fire hydrant. The method comprises the steps that a water inlet valve is opened, waterflowenters a first fire protection stand pipe, the waterflow pushes a second fire protection stand pipe to move to the water outlet end of the second fire protection stand pipe, meanwhile, a stretching opening is opened, the second fire protection stand pipe stretches out of a fire hydrant cabinet through the stretching opening, the first fire protection stand pipe and the second fire protection standpipe are connected, the waterflow enters the second fire protection stand pipe from the first fire protection stand pipe, a water outlet valve is opened, the waterflow is drained through the water outlet valve, and when the water inlet valve is in the transition state, the second fire protection stand pipe is in the stretching state but the pipe stops draining water; the water inlet valve is closed, the waterflow enters a water containing cavity, the waterflow pushes the second fire protection stand pipe to move to the water inlet end of the first fire protection stand pipe, the first fire protection stand pipe and the second fire protection stand pipe are disconnected, and the second fire protection stand pipe stops draining water; an opening and closing assembly is switched from the opening state to the closing state till the second fire protection stand pipe is completely shrunk into the first fire protection stand pipe, and the stretching opening is closed.

The invention provides a self-flexible concealed fire hydrant installed on a municipal road or a building floor. The self-flexible concealed fire hydrant comprises a fire hydrant body buried below theground and capable of being switched between automatically extending above the ground and automatically shrinking below the ground and providing a water source for firefighter, a first valve arrangedbetween the fire hydrant body and a city water supply pipeline for controlling the fire hydrant body to be switched between an extended state and a shrinked state, and an opening and closing mechanism arranged outside the fire hydrant body in a sleeving mode. The opening and closing mechanism can receive the fire hydrant body's drive to switch between an open state and a closed state. The fire hydrant is installed below the ground surface. When the fire hydrant is not in use, the fire hydrant does not take up space and is not easily damaged by vehicles and other impacts and can automaticallyextend the ground to complete water supply.

The invention provides a linkage control fire hydrant based on high-pressure water source power. The linkage control fire hydrant comprises a base arranged below the earth surface and a flexible firehydrant body arranged on the base, the base is further provided with an opening-closing mechanism, and the opening-closing mechanism sleeves the flexible fire hydrant body and can receive drive of theflexible fire hydrant body to be switched between the opening state and the closing state; the opening-closing mechanism comprises a mounting shelf which is arranged on the base, an opening-closing assembly is arranged at the top of the mounting shelf, a driving mechanism for driving the opening-closing assembly to be switched between the opening state and the closing state is arranged between the base and the flexible fire hydrant body, the driving mechanism is connected with the driving end of a first drive mechanism, the output end of the first drive mechanism is connected with the drivingend of a second drive mechanism, and the output end of the second drive mechanism is connected with the driving end of the opening-closing assembly.

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.