JPH04911Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a water spray head for fire extinguishing or cooling LNG tanks, etc.

BACKGROUND ART Conventionally, as this type of water sprinkler head, one in which a water outlet is provided in the center of a cylindrical head, and one in which a water outlet is provided in the side wall of a cylindrical body are known.

Problems to be solved by the invention In conventional water sprinkling heads, the pressure water discharged from the water outlet has a larger flow rate closer to the axis of the water outlet and is scattered further away, resulting in a radial water sprinkling state.

Therefore, when this water spray head is used to cool and spray water on the vertical walls of an LNG tank or the like, the amount of water sprayed is large in the vicinity and small in the distance, making it impossible to obtain a uniform water distribution.

In view of the above circumstances, the object of this invention is to provide a water spray nozzle that can spray a uniform amount of water both near and far, even if the object to be extinguished or cooled is elongated.

Means for Solving the Problem This invention is for extinguishing or cooling a long and thin object such as a rectangle, and includes a nozzle body,
It consists of a cylindrical tube tip with a head joined to this, and a water outlet is provided in the head of the tube tip, and the water outlet is a through hole formed in the center of the head. This is a water spray nozzle for fire extinguishing and cooling, characterized in that it is comprised of a notch part that is continuous with the through-opening part and reaches the periphery of the head part.

Function: A water spray nozzle is installed obliquely near a long and narrow object, such as an LNG tank, with the front tube part facing diagonally downward and the water outlet facing the vertical wall of the tank.

In this state, when pressure water is supplied to the water spray nozzle, the pressure water scatters from the water outlet toward the vertical wall.

At this time, a strong, large flow of water is discharged far away from the flow at the through-hole, and a small amount of water is discharged from the notch, where the flow is weak, and a small amount of water is discharged nearby, resulting in an overall uniform water distribution.

Embodiment An embodiment of this invention will be described with reference to the accompanying drawings, where the same reference numerals have the same names and functions.

An orifice 2 for flow rate adjustment is provided at one end of the cylindrical nozzle body 1, and a cylindrical tube tip 3 is screwed into the other end.

The tube tip 3 includes a head 31 and a water outlet 32.

This water outlet 32 is formed in a U-shape or a V-shape, and a through-hole 32 is formed in the center of the head 31.
a, and a notch 32b that is continuous with the through-opening 32a and reaches the periphery of the head 31. By changing the length x, width y, and height z of the water outlet 32, the water discharge pattern and flow rate are adjusted. In addition, in Fig. 5, a, b,
c and d are scales indicating the amount of precipitation.

Next, the operation of this embodiment will be explained.
A water spray nozzle N is installed obliquely in the vicinity of the LNG tank T, with the barrel tip 3 facing diagonally downward and the water outlet 32 facing the vertical wall surface V of the tank. (4th
In this state, the pressurized water supplied to the nozzle body 1 through the orifice 2 passes through the cylinder tip 3 and is discharged from the water outlet 32 toward the vertical wall surface V of the tank. At this time, the flow is stronger as it is closer to the axis C of the nozzle N, and a large flow of water is discharged to the far distance A32, forming a large water dispersion area L, and the pressure water of the precipitation amount b is uniformly distributed at the lower part T1 of the wall surface V. is sprinkled with water.

Further, the pressure water whose flow direction has been changed by hitting the head 31 is sprayed in directions B32 and C32 that are inclined upward with respect to the axis C of the nozzle N, but the farther from the axis C, the weaker the flow is. As a small amount of water, there is a medium amount of water spraying area M and a small amount of water spraying area S in the vicinity.
is formed, and pressure water with a precipitation amount b is uniformly sprayed on the middle T2 and upper T3 of the vertical wall surface. That is, the through-opening portion of the head 31 has a larger amount of water discharged than the cut-out opening portion, and the strength of the water discharge is also stronger.

In this way, the pressure water is transferred to the upper part T of the vertical wall surface V.
3. Water is uniformly sprinkled on the middle part T2 and the lower part T1, and a uniform water distribution Q can be obtained as a whole.

Effects of the invention This invention is configured as described above, so it is possible to extinguish fires and
After tilting the cooling water nozzle so that the tip of the tube is diagonally downward and facing the water outlet to an object such as the vertical wall of the tank, when pressurized water is supplied to the nozzle, the water flowing through the through-hole becomes strong. A large amount of water is discharged far away, and a small amount of water with a weak flow at the notch opening is discharged nearby, resulting in an overall uniform distribution of water.

[Brief explanation of the drawing]

Figures 1 to 3 are diagrams showing an embodiment of this invention, where Figure 1 is a longitudinal sectional view, Figure 2 is a front view, Figure 3 is a plan view, and Figure 4 is a diagram showing the state of use. , FIG. 5 is a diagram showing the water sprinkling state. 1... Nozzle main body, 3... Tube tip, 31... Head, 32... Water outlet.

Claims (1)

[Scope of utility model registration request] It consists of a nozzle body and a cylindrical tube tip portion having a head joined to the nozzle body, and a water outlet is provided in the head of the tube tip portion, and this water outlet is formed in the center of the head. 1. A water spray nozzle for fire extinguishing and cooling, characterized in that it is comprised of a through-opening section and a notch section that is continuous with the through-opening section and reaches the periphery of the head.