A fire-fighting water monitor head that adopts hydraulic drive for direct-current spray conversion

Abstract

The invention discloses a fire-fighting water monitor head which adopts hydraulic drive to convert direct-current spraying. It is composed of water electromagnetic reversing valve, sealing ring and so on. The head of the fire water monitor uses the most commonly used pressure water in the fire extinguishing site as the power source, and drives the valve core to work through the conduction of the electromagnets at the left and right ends of the three-position four-way pure water electromagnetic reversing valve. The water pressure chamber is pressurized, so that the nozzle slides back and forth, realizing the automatic and smooth conversion between the direct current injection and the spray injection of the fire water monitor head. Due to the direct use of hydraulic drive, the disadvantages of complex mechanism and large volume when using hydraulically controlled telescopic oil cylinders or electronically controlled transmission mechanisms to realize DC spray conversion are eliminated. The conversion device has a simple and compact structure and is easy to operate, and is especially suitable for occasions where multiple functions such as fire extinguishing, cooling, dilution, and protection are required in fire fighting operations.

Description

technical field [0001] The invention relates to a nozzle of a fire-fighting water monitor, in particular to a nozzle of a fire-fighting water monitor which adopts hydraulic drive to convert direct-current spraying. Background technique [0002] The fire water cannon is a kind of fire-fighting equipment that extinguishes fires at a certain distance by means of water jets. There are two typical forms of water jets: direct-flow injection and spray injection. Generally, the transformation between direct-flow injection and spray injection is realized by controlling the action of the spray nozzle of the nozzle of the water monitor. [0003] At present, the commonly used fire water monitor head can be divided into three types: manual, hydraulic control and electric control. The fire-fighting water cannon that performs DC spray conversion through manual operation requires the fire fighters to rotate the DC spray conversion sleeve in person, which will bring certain dangers to the f...

AI Technical Summary

Problems solved by technology

Utility model patent 200420082699.2 discloses an integral liquid-controlled DC-spray fire monitor nozzle. This patent adopts the form of a built-in sliding nozzle and combines the telescopic hydraulic cylinder with the sliding nozzle. Although the overall structure is relatively compact, due to the need for An additional hydraulic oil source is used to provide power, and a hydraulic control device is required to drive the hydraulic cylinder, so the conversion mechanism has a small scope of application and can only be used for hydraulic-controlled fire monitors

The fire water monitor head that converts DC spray through electric control is generally realized by driving a mechanical transmission mechanism with an AC motor or a stepping motor. Due to the mechanical transmission device in the driving mechanism, there will be mechanical impact during the transmission process. Due to the force Unevenness is easy to cause jamming, and the volume of the entire gun head will increase accordingly

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