A spiral rectification device for the head of a fire water monitor

Abstract

The invention discloses a spiral rectifying device for a monitor head of a fire-fighting monitor. The spiral rectifying device comprises a spray nozzle, a spray pipe and a rectifying device, wherein the spray nozzle and the spray pipe are detachably connected; a flange is arranged at the water inlet end of the spray pipe; the rectifying device is arranged at the flange end, is axially welded in the spray pipe and comprises a plurality of inner rib plates, a plurality of outer rib plates, an inner circular tube and an outer circular tube; both the inner rib plates and the outer rib plates are spiral; one side of each inner rib plate is axially welded on the outer wall of the inner circular tube; the other side of each inner rib plate is axially welded on the inner wall of the outer circular tube; one side of each outer rib plate is axially welded on the outer wall of the outer circular tube; the other side of each outer rib plate is axially welded on the inner wall of the spray pipe; and the inner rib plates, the outer rib plates, the inner circular tube and the outer circular tube form an inner-outer three-layer axially-communicating channel by welding. By researching the influence of the length, the section shape, the mounting position and the like of the rectifying device on jet performance of the monitor, the device is arranged in the spray pipe of the fire-fighting monitor, thereby rectifying incoming water.

Description

technical field [0001] The invention relates to the technical field of fire-fighting water monitors, in particular to a spiral rectification device for a nozzle of a fire-fighting water monitor. Background technique [0002] Fire water cannon has become the most common fire extinguishing equipment due to its large flow rate and long range. In addition, it also plays a deterrent role in territorial waters security, expulsion of illegal maritime industries and pirates, etc. Water cannons are environmentally friendly and can replace arms Avoid local wars. [0003] The long-range fire monitor sprays water with a certain flow and pressure from the nozzle structure of the gun head in the form of a jet at high speed. Through the impact of the water, it breaks through obstacles and extinguishes fires beyond a certain distance. And the impact force is related to the structure of the nozzle and the state of the sprayed fluid. The ideal nozzle jet water column is: small divergence an...

AI Technical Summary

Problems solved by technology

For large-flow and long-range fire-fighting water monitors, the loss of the rectification device accounts for about 55% of the total loss of the water monitor. It can be seen that the total pressure loss is very large during rectification, which is not conducive to the increase of the range of the water monitor.

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