JP2000254556A - Spray nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a spray nozzle usable while suppressing the clogging to the minimum even in the case of spraying a fluid with a large quantity of foreign matter. SOLUTION: This spray nozzle comprises a turbulent fluid-generating body installed and fixed and extended in the axial direction of a housing part 13 installed in a nozzle body and the turbulent fluid-generating body is provided with a turbulent chamber-dividing part 15 for dividing an inflow-chamber 13' and a turbulence chamber 14' for a liquid fluid in the housing part 13, a skirt part 16 extended from the turbulent chamber-dividing part 15, and a nozzle orifice part 18 joined to the opening of the turbulent fluid-generating body 14 and extended in the extension direction of an introduction inlet 12 and the inflow chamber 13'.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray nozzle, and more particularly, to a spray nozzle capable of discharging a liquid fluid such as cooling water in a circular and uniform discharge pattern in a direction of introduction, that is, a circular whole surface pattern.

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

[0003]

2. Description of the Related Art A typical example of this type of conventional spray nozzle is disclosed in FIG. The spray nozzle 10a has a nozzle body 11a and a nozzle opening 16a.
And are included. Nozzle body 11a has inlet 12a
A communication passage 13a communicating with the introduction port 12a is formed, and a flow chamber 14a extending in a direction perpendicular to an extension direction of the introduction port 12a and the communication passage 13a is formed. In this case, the communication passage 13a communicates with the flow chamber 14a in a tangential direction of the flow chamber 14a. A nozzle opening 16a is screwed to the nozzle body 11a at the opening of the flow chamber 14a, and a nozzle opening 18a is formed in the nozzle opening 16a and gradually expands outward. Therefore, in the spray nozzle 10a of FIG. 5, the liquid fluid flowing into the flow chamber 14a via the inlet 12a and the communication path 13a is directed to the communication path 13a in the tangential direction of the flow chamber 14a. The fluid flows to the nozzle opening 16a, and is also caused to flow along the spiral path substantially within the ejection opening 18a of the nozzle opening 16a, and is spread over a wide area from the ejection opening 18a with an annular discharge pattern. .

[0004]

However, in the spray nozzle 10a shown in FIG. 6, although the liquid fluid is sprayed over a wide range, the spray pattern is annular, so that spraying is not performed at the center of the circle. However, there has been a problem that the liquid fluid cannot be evenly distributed to the spray target.

In order to solve this problem, a spray nozzle 10b shown in FIG. 6 is provided. In the spray nozzle 10b, the inlet 12b and the communication passage 13b
Extends at right angles to the extension direction of the opening, one of which is closed and the other is opened toward an ejection port 18b having a region where the area gradually decreases and a region where the area gradually increases. The communication path 1 is connected between the wall surfaces via an arcuate surface 15b, and near the closed surface on one side.
A spray nozzle is provided having a turbulent chamber 14b communicated with the communication passage 3b and the communication passage 13b.

However, in the above-described spray nozzle shown in FIG. 6, the diameter of the communication passage 13b, in other words, the minimum foreign matter passage diameter is small, and in applications where a large amount of foreign matter is mixed, clogging frequently occurs and maintenance is complicated.

Thus, the present invention solves the above problems,
A liquid fluid such as cooling water can be sprayed with a wide circular pattern over a wide area, and the density of the spray liquid can be sufficiently uniform in both the central part and the peripheral part of the circular discharge pattern. It is an object of the present invention to provide a spray nozzle that can be used while minimizing clogging even when a large amount of fluid is sprayed.

[0008]

According to the present invention, there is provided a nozzle body, an inlet provided in the nozzle body and connected to a supply pipe.
An accommodating portion 13 provided in the nozzle body 11 and having a larger diameter than the inlet; and a liquid fluid inflow chamber 13 ′ and a turbulent flow chamber 14 attached to and fixed to the accommodating portion 13 of the nozzle body and extending in the extending direction. Turbulence chamber partitioning section 1
5 and a turbulent fluid 14 having a skirt portion 16 extending to the turbulent chamber partitioning portion 15, and coupled to the opening of the turbulent fluid 14 and communicated with the turbulent chamber 14 ', the inlet 12 and the inflow chamber And a nozzle opening 18 extending in the extension direction of 13 '.

[0009]

In the spray nozzle according to the present invention having the above-described structure, the liquid fluid such as cooling water which flows into the turbulent flow path through the communication path is partially discharged into the turbulent flow chamber, and then the ejection port is discharged. At this time, the turbulence component of the liquid fluid interferes with the liquid fluid such as cooling water flowing through the spiral path in the turbulent flow chamber, and the turbulent component is discharged from the ejection port with this turbulent state, so that a wide range is obtained. And an action of dispersing a liquid fluid such as cooling water with a circular whole surface pattern having a uniform dispersing liquid density.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, a spray nozzle 10 includes a nozzle body 11, which is connected to a supply pipe (not shown) for a liquid fluid such as cooling water. An inlet 12 to be connected is provided so as to extend in the axial direction, and a housing 13 communicating with the inlet 12 and having a larger diameter than the inlet 12 extends in the axial direction. Further, a turbulent fluid 14 is mounted and fixed in the housing 13 of the nozzle body 11. The turbulent fluid 14 is provided with a turbulent chamber partition 15 and a skirt portion 16 connected to the turbulent chamber partition 15, and the turbulent chamber partition 15 is a liquid when it is fitted into the housing 13 of the nozzle body. The fluid inflow chamber 13 'and the turbulence chamber 14' are configured to be partitioned.

Further, a single communication port 17 is preferably provided on the peripheral wall of the turbulence chamber section 15. The communication port 17 ejects the liquid fluid from the inflow chamber 13 ′ to the turbulent chamber 14 ′. In the turbulent chamber 14 ′, the turbulent component of the liquid fluid interferes with the liquid fluid flowing along the spiral path. They are provided so that they merge and generate turbulence.

The communication port 17 may be formed in the peripheral wall of the turbulence chamber section 15 so as to have a slight angle with respect to the central axis of the turbulence chamber 14 '.

On the other hand, a nozzle opening 18 located along the axis of the nozzle body 11 is connected to the opening of the turbulent fluid 14. The nozzle opening 18 is provided with a jet port 19 including a region 18a having a gradually decreasing area, a throat 18b, and a region 18c having a gradually increasing area, and is communicated with a turbulence chamber 14 '. The liquid fluid in the turbulent state generated in 'is sprayed with a circular pattern over a wide area and with a uniform spray liquid density over the entire circular pattern.

The radius of the arc surface 20 of the turbulence chamber 14 'is preferably set to 2/10 to 3/10 of the diameter of the turbulence chamber 14'.

In the prior art shown in FIG. 6, the spray nozzle 10b has an inlet 12b and the nozzle body 1
Since the nozzle body 11b has a nozzle body 11b extending along the axis 0b and the nozzle body 16 having an ejection port 18b extending at right angles to the axis, the ejected circular pattern CP is displaced from the object OB. The ejection function is reduced.
In addition, if a configuration is adopted in which the circular pattern CP and the target object OB are matched, peripheral devices become complicated. On the other hand, in the present invention, since the nozzle body 18 is located along the axis of the nozzle body 11 having the inlet 12, a circular ejection pattern CP can be provided as shown in FIG.

[0016]

According to the spray nozzle of the present invention constructed as described above, a liquid fluid such as cooling water can be sprayed effectively with a circular whole surface pattern over a wide range.
The sprinkling liquid density can be made sufficiently uniform at both the central portion and the peripheral portion of the discharge pattern, and further, a remarkable effect can be achieved such that clogging in the liquid flow path can be significantly reduced and maintenance can be facilitated.

[Brief description of the drawings]

FIG. 1 is a front view of a spray nozzle according to the present invention.

FIG. 2 is a vertical sectional view at the center of FIG.

FIG. 3 is a diagram illustrating the operation of a spray nozzle according to the present invention.

FIG. 4 is an explanatory view of the operation of a conventional spray nozzle.

FIG. 5 is a central longitudinal sectional view of one conventional example.

FIG. 6 is a central longitudinal sectional view of another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Spray nozzle 11 Nozzle body 12 Inlet 13 Storage part 14 Turbulent fluid 15 Turbulence chamber division 16 Skirt 17 Communication port 18 Nozzle mouth 19 Spout 20 Arc surface

Claims (2)

[Claims] A nozzle body (11) and a nozzle body (11)
Inlet 12 provided in the nozzle body 11 and having a larger diameter than the inlet provided in the nozzle body 11.
3 and a turbulent chamber partitioning portion 15 which is attached to and fixed to the storage portion 13 of the nozzle body, extends in the extension direction, and partitions the liquid fluid inflow chamber 13 ′ and the turbulent flow chamber 14 ′ in the storage portion 13 and the turbulence chamber partitioning portion 15. Skirt part 16 extended to flow chamber partition part 15
A turbulent fluid 14 having
And it communicates with the turbulence chamber 14 ′, and the inlet 12 and the inflow chamber 1
A spray nozzle comprising: a nozzle opening 18 extending in an extension direction of 3 ′. 2. The spray nozzle according to claim 1, wherein the nozzle orifice has an outlet having a region whose area gradually decreases outward from the turbulence chamber and a region whose area gradually increases.