JPH0363434B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a spray nozzle that sprays liquid fluid such as cooling water in a direction perpendicular to the direction of introduction and has a circular and uniform discharge pattern, that is, a circular overall pattern. The present invention relates to a spray nozzle that can emit.

This type of spray nozzle is useful when clogging is likely to occur due to foreign matter mixed into the liquid, or when the liquid fluid supply pressure is relatively low and a strong striking force is required.

(Prior Art) Typical examples of conventional spray nozzles of this type include those shown in FIGS. 3 and 4. The spray nozzle 10a includes a nozzle body 11a and a nozzle mouth body 16a. Nozzle body 1
An inlet 12a and a communicating passage 13a communicating with the inlet 12a are formed in 1a, and a swirling chamber 14a extending perpendicularly to the direction in which the inlet 12a and the communicating passage 13a extend is formed.
In this case, the communication passage 13a communicates with the swirling chamber 14a in the tangential direction of the swirling chamber 14a. Also, swirl chamber 1
A nozzle mouth body 16a is screwed to the nozzle body 11a at the opening of the nozzle body 11a.
A spout 18a that gradually expands outward is formed therein. Therefore, in the spray nozzle 10a of FIGS. 3 and 4, the liquid fluid flowing into the swirling chamber 14a via the inlet 12a and the communicating passage 13a flows in the tangential direction of the swirling chamber 14a through the communicating passage 13a.
is directed toward the nozzle mouth body 16a.
and the spout 18a of the nozzle mouth body 16a.
It is made to flow substantially in a spiral path even within the interior of the room, and can be dispersed over a wide area from the jet port 18a in an annular discharge pattern.

However, in the spray nozzle 10a shown in FIGS. 3 and 4, although the liquid fluid is sprayed over a wide range, since the discharge pattern is annular, the spraying is not performed in the center of the circle, and the liquid is not sprayed on the spray target. There was a problem that the liquid fluid could not be uniformly distributed.

In order to solve this problem, a spray nozzle 10b shown in FIG. 5 is further provided. In the spray nozzle 10b, an inlet 12b and a communication passage 13b are formed in the nozzle body 11b, and two nozzle mouth bodies 16b and 16b' are screwed together to define a swirling chamber 14b communicating with the communication passage 13b. ing. Further, one nozzle mouth body 16b is provided with a spout 18b having a region where the area gradually narrows and a region where the area gradually expands, and the other nozzle mouth body 16b' is provided with an inner part forming the bottom surface of the swirling chamber 14b. The end face is inclined downward toward the outlet of the communication passage 13b, that is, so as to reflect the liquid fluid flowing from the communication passage 13b toward the spout 18b. Therefore, the spray nozzle 10 of FIG.
The liquid fluid flowing into the swirling chamber 14b via the inlet 12b and the communication path 13b at b is the swirling chamber 14b.
, and then flows toward the spout 18b and can be distributed in a circular pattern through the spout 18 of varying area.

According to this spray nozzle 10b, compared to the spray nozzle 10a of FIGS. 3 and 4, the discharge pattern is circular, and the liquid fluid can be discharged even in the center of the circular discharge pattern. However, in this configuration, the discharge pattern is determined according to the degree of inclination of the inclined surface of the swirling chamber 14a, and the discharge pattern tends to be elliptical. There was a problem that the release pattern could not be obtained. On the other hand, in this case, it is necessary to use highly accurate machining or special tools in order to form the emission pattern into a desired circular overall pattern, resulting in a problem that the manufacturing process becomes complicated and the cost increases.

Therefore, the present invention solves the above-mentioned problems and is capable of distributing liquid fluid such as cooling water in a circular pattern over a wide range, and is capable of distributing liquid fluid such as cooling water in both the central and peripheral areas of the circular discharge pattern. It is an object of the present invention to provide a spray nozzle that can make the liquid density sufficiently uniform.

(Means for Solving the Problems) In order to achieve the above object, according to the present invention, the inlet port and the communication path extend perpendicularly to the extending direction of the communication path,
One side is closed, and the other side is opened toward a spout having a region where the area gradually narrows and a region where the area gradually expands, and on one side, the closed surface and the side peripheral wall surface are connected via an arc-shaped surface. A spray nozzle is provided that includes a communication passageway and a turbulence chamber that communicates with the communication passageway near one closed surface.

(Function) With the spray nozzle according to the present invention having the above-described configuration, liquid fluid such as cooling water flowing into the turbulent flow chamber through the communication path flows into the turbulent flow chamber and then passes through the spout port. At the same time, the other part that flows into the turbulence chamber and reaches the closed surface takes a spiral path along the arcuate surface and heads toward the spout. The other part of the liquid fluid, such as cooling water, flows through the water while interfering with the part that changes direction at right angles, creating a turbulent flow.By releasing this turbulent flow from the spout, it spreads over a wide area. At the same time, it is possible to realize the effect of spraying liquid fluid such as cooling water in a circular pattern over the entire surface with uniform density of the sprayed liquid.

(Example) Referring to FIGS. 1 and 2, a spray nozzle 10 includes a nozzle body 11, and the nozzle body 11 is connected to a supply pipe (not shown) for liquid fluid such as cooling water. The introduction port 12 is provided so as to extend in the axial direction thereof, and the introduction port 12
A communication path 1 that communicates with the inlet and has a smaller diameter than the inlet 12.
3 extends in the axial direction and is slightly offset from the center. In addition, the nozzle body 11 has an inlet 12.
A turbulent flow chamber 14 is also formed to communicate with the communication passage 13 and extend in a direction perpendicular to the axial direction, that is, in a direction perpendicular to the extension direction of the introduction port 12 and the communication passage 13.

The turbulent flow chamber 14 is closed on one side and opened on the other side, and has a communication passage 13 near the closed surface on one side.
are being communicated. Further, the closed surface and the side circumferential surface of the turbulent flow chamber 14 are connected via an arcuate surface 15, and are formed in a bowl shape as a whole.
A part of the liquid fluid such as cooling water flowing into the turbulent flow chamber 14 is changed direction toward the opening side, and at the same time, a portion of the liquid fluid such as the cooling water flowing into the turbulent flow chamber 14 from the communicating path 13 flows into the turbulent flow chamber 14 and reaches the closed surface. The portion rises in a spiral path along the arcuate surface 15, and is provided so as to interfere with and merge with a portion of the liquid fluid that is changing direction at right angles to produce turbulent flow.

On the other hand, a nozzle mouth body 16 having an axis perpendicular to the axis of the nozzle body 11 is screwed to the nozzle body 11 at the opening of the turbulent flow chamber 14 . The nozzle mouth body 16 is provided with a spout 18 consisting of a region 17a whose area gradually narrows, a throat portion 17b, and a region 17c whose area gradually expands.
The turbulent flow chamber 14 is connected to the turbulent flow chamber 14, and the turbulent liquid fluid generated in the turbulent flow chamber 14 is spread over a wide area in a circular pattern having a uniform distribution density throughout the circular pattern. It is designed to be sprayed from the ground.

The radius of the circular arc surface 15 of the turbulent flow chamber 14 is preferably 2/10 to 3/10 of the diameter d of the turbulent flow chamber 14, and is perpendicular to the axis, that is, the radius of the inlet 12 and the communication path. The length h of the nozzle body 11 in the direction perpendicular to the direction of extension of the nozzle body 13 is equal to 1 of the diameter d of the turbulence chamber 14.
Experiments have shown that it is preferable to double the amount.

(Effects of the Invention) According to the spray nozzle according to the present invention configured as described above, liquid fluid such as cooling water can be effectively sprayed in a circular pattern over a wide range, and the central part of the discharge pattern can be sprayed effectively. In addition, the density of the sprayed liquid can be made sufficiently uniform at any part of the periphery,
For example, it can be used in the cooling process of high-temperature steel materials to achieve remarkable effects such as preventing uneven cooling.

[Brief explanation of drawings]

FIG. 1 is a central vertical sectional view of a spray nozzle according to the present invention, FIG. 2 is a side view of the same, FIG. 3 is a central longitudinal sectional view of a conventional spray nozzle, FIG. 4 is a horizontal sectional view of the same, and FIG. FIG. 3 is a central vertical cross-sectional view of another conventional spray nozzle. 10... Spray nozzle, 11... Nozzle body, 12... Inlet, 13... Communication path, 14...
Turbulent flow chamber, 15... Arc surface, 16... Nozzle mouth body,
18... spout.

Claims (1)

[Scope of Claims] 1. A nozzle body, an inlet provided in the nozzle body and connected to a supply pipe, a communication passage provided within the nozzle body and communicating with the inlet, and a communication passage formed in the nozzle body and connected to the inlet and the inlet. It extends perpendicularly to the extending direction of the communicating path, one side is closed and the other side is open, the closed surface and the side circumferential surface are connected on one side via an arcuate surface, and the closed surface on one side is connected in the vicinity of the closed surface. a turbulence chamber communicating with the passage;
coupled to the nozzle body at the opening of the turbulence chamber;
A jet that communicates with the turbulent flow chamber, extends in a direction perpendicular to the extension direction of the inlet and the communication path, and has a region whose area gradually narrows outward from the turbulent flow chamber and a region whose area gradually expands. A spray nozzle comprising a nozzle mouth body having an outlet. 2 The radius of the circular arc surface that connects the closing surface and the side peripheral surface on one side of the turbulence chamber is 2/10 to 3/ of the diameter of the turbulence chamber.
10. A spray nozzle according to claim 1. 3 The length of the nozzle body in the direction perpendicular to the extension direction of the inlet and communication path is 1 to 2 times the diameter of the turbulence chamber.
The spray nozzle according to claim 1, which is doubled in size.