JPS6338932Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a gas-liquid mixed spray that is used for cooling steel materials to be rolled by spraying water, or for spraying chemical solutions on crops in vegetable gardens, orchards, etc. The present invention relates to a nozzle device.

The conventional nozzle device, as shown in FIG.
A tube 103 that injects liquid or gas toward the orifice 101 is coaxially inserted and fixed into an injection tube 102 having an orifice 101 for gas-liquid spraying formed at its tip, and the injection tube Both injection pipes 10 are connected to the gas-liquid mixing space 104 of the injection pipe 102 at the base end portion of the injection pipe 102.
A pipe 106 for injecting and supplying gas or liquid was connected to the annular space 105 formed between the two and 103, but this method has the following disadvantages.

That is, since the radial width in the axial direction of the annular space 105 is constant and there is no throttle effect, this annular space 1
In order to equalize the pressure in the circumferential direction of the gas or liquid injected from 05 into the gas-liquid mixing space 104, it is necessary to make the insertion length of the liquid or gas injection pipe 103 as large as possible. Furthermore, since the liquid and gas are ejected in parallel toward the gas-liquid mixing space 104, the axial length of the gas-liquid mixing space 104 should also be as large as possible in order to reliably atomize the liquid. There is a need. As a result, the entire nozzle device becomes larger, making it more susceptible to installation space constraints.
Versatility decreases. Moreover, as mentioned above, the insertion length of the liquid or gas injection tube 103 is quite long, so alignment of the tip of the liquid or gas injection tube 103 and the gas or liquid injection tube 102 requires advanced technology and strict precision. is required, and as mentioned above, the overall size of the device increases, which tends to lead to a rise in manufacturing costs.

In view of the above-mentioned circumstances, the present invention aims to improve versatility and reduce manufacturing costs by rationally modifying the flow path that injects and guides gas or liquid toward the gas-liquid mixing space in the injection pipe. The characteristic structure for achieving the purpose is to attach a liquid or A nozzle that injects gas is fixed with a coaxial core or nearly coaxial core, and an opening for injecting gas or liquid toward a space formed on the outer periphery of the liquid or gas injection flow path of this nozzle is formed. The cross-sectional area is smaller than that of the space between the gas-liquid mixing space in the injection pipe and the space, and the gas or liquid in the space is connected to the liquid or gas injection flow path. The point is that a flow path is formed at or near the axis on the orifice side of the jet nozzle in an inclined position that allows jetting to be guided.

The functions and effects of the above characteristic configuration are as follows.

That is, by making the cross-sectional area of the flow path that communicates the gas-liquid mixing space and the gas or liquid supply space smaller than that of the gas or liquid supply space to provide a throttling effect, the gas or liquid supply space is Although the axial length of the flow path is configured to be as short as possible, the pressure of the gas or liquid injected into the gas-liquid mixing space can be equalized in the circumferential direction. Moreover, since the flow path is inclined toward the axis on the orifice side than the jet port of the liquid or gas injection flow path, the axis length of the gas-liquid mixing space can be configured as short as possible. It is possible to improve the miscibility of liquid and gas and perform atomization with fine and uniform atomized particle size.

Therefore, the entire nozzle device can be configured more compactly than in the past, making it less susceptible to restrictions on installation space and improving versatility. Moreover, in spite of the high atomization performance as described above, the required centering accuracy is low, and the entire device can be constructed compactly, which together with the fact that manufacturing costs can be reduced.

Furthermore, in the case where the inclined flow path is composed of a plurality of flow path portions formed at appropriate intervals in the circumferential direction, for example, compared to the case where the inclined flow path is formed in an annular shape, This has the advantage that it is possible to have a large radial width while forming the flow passages to have the same cross-sectional area, and that clogging by foreign matter can be effectively suppressed.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in Figures 1 and 2, a gas-liquid mixing nozzle device used for cooling rolled steel by spraying water is configured with a gas-liquid spray nozzle at the tip. A nozzle 3 that injects liquid toward the orifice 1 is inserted coaxially into the base of the injection pipe 2 forming the orifice 1, and is screwed and fixed. An opening 5 for injecting gas into the annular space 4 formed between these two and 3 is formed in the outer peripheral part, that is, in the part of the injection pipe 2 corresponding to the insertion part of the nozzle 3, and Gas-liquid mixing space 6 in pipe 2
and the annular space 4, the cross-sectional area of which is smaller than that of the annular space 4, and the gas supplied into the annular space 4 is directed to the ejection holes of the liquid injection channel 3A. An annular flow path 7 is formed in an inclined position toward the axis of the orifice 1 or substantially toward the axis of the orifice 1 than the annular flow path 3a.

The injection pipe 2 includes a nozzle tip 2A forming the orifice 1, a pipe body 2B forming the gas-liquid mixing space 6, a female screw portion for fixing the nozzle 3, and the gas injection supply port 5. The nozzle tip 2A and the tubular member 2B are screwed together and fixed, and the tubular member 2B and the tubular member 2C are welded together in a concentrically fitted state. It is stuck to.

A connecting fitting 9 for a gas supply device 8 such as an air compressor is fixed by welding to the peripheral edge of the gas injection supply port 5 on the outer peripheral surface of the cylindrical member 2C.

The inner circumferential surface 2a of the nozzle tip 2A is formed into a tapered curved surface whose diameter becomes smaller toward the orifice 1 side.

The nozzle 3 includes a liquid supply device 1 such as a pump.
0, and a circumferential groove 3c constituting the annular space 4 are formed.

3 to 5 show another embodiment, in which the inclined flow path 7 is formed at four locations on the outer peripheral surface of the nozzle 3 that are displaced by 90 degrees in the circumferential direction. It is composed of road portions 7a...

In forming the flow path portion 7a, the width may be formed in a lap shape such that the width in the circumferential direction becomes larger toward the downstream side in the gas flow direction as shown in FIG. 6, or in the upstream direction in the gas flow direction as shown in FIG. It may be formed in a reverse lap shape in which the width in the circumferential direction becomes larger toward the side.
As shown in the figure, it may be formed so as to be inclined in a spiral direction with respect to the axis of the nozzle 3.

Further, the cross-sectional shape of the flow path portion 7a is not limited to a rectangular shape as shown in FIG.
It may be formed into a V-shape as shown in the figure A, a U-shape as shown in the square, a dovetail groove-like shape as shown in the figure C, or the like.

FIGS. 10 and 11 show another embodiment, in which two cylindrical members 2C, which are constituent members of the injection pipe 2 and are fixed to the pipe body 2B, are disposed in an annular space 4 and displaced by 180 degrees in the circumferential direction. An inclined flow path 7 consisting of flow path portions 7a and 7b is formed, while a liquid jet flow path 3A and a gas jet supply port 5 are formed on the nozzle 3 side, and a connecting fitting 9 is fixed.

In the above embodiment, the liquid is injected from the nozzle 3 into the gas-liquid mixing space 6, and the gas is injected from the injection supply port 5 into the gas-liquid mixing space 6 through the space 4 and the inclined flow path 7. However, on the contrary, the present invention may be implemented in such a manner that the gas is injected from the nozzle 3 and the liquid is injected from the injection supply port 5, respectively.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of a nozzle device for gas-liquid mixing spray, and FIG. 2 is a sectional view taken along the line -- in FIG. 3 to 5 show another embodiment, and the third
The figure is a longitudinal sectional front view of the main part, FIG. 4 is a sectional view taken along the line -- in FIG. 3, and FIG. 5 is a front view of the nozzle. 6 to 8 are front views showing different nozzles, FIG. 9 A, B, and C are sectional views showing different flow path shapes, and FIGS. 10 and 11 are different embodiments. FIG. 2 is a longitudinal sectional front view of the main part shown and a sectional view thereof taken along the line XI-XI. FIG. 12 is a longitudinal sectional front view showing a conventional nozzle device. 1... Orifice for gas-liquid spraying, 2... Injection pipe,
2a...inner circumferential surface, 3...nozzle, 3a...spout hole, 4...space, 5...jet supply port, 6...gas-liquid mixing space, 7...inclined channel.

Claims (1)

[Claims for Utility Model Registration] 1. A nozzle 3 that injects liquid or gas toward the orifice 1 is attached to the base of an injection pipe 2, which has an orifice 1 for gas-liquid spraying formed at its tip, with a coaxial center or nearly coaxial center. The nozzle 3 is fixed in a core state, and has an opening 5 for injecting gas or liquid toward the space 4 formed on the outer periphery of the liquid or gas injection flow path 3A of the nozzle 3, and has between the gas-liquid mixing space 6 and the space 4, the cross-sectional area of which is smaller than that of the space 4, and the gas or liquid in the space 4 is connected to the liquid or gas injection flow path 3A. spout 3a
A nozzle device for a gas-liquid mixture spray, in which a flow path 7 in an inclined position capable of guiding a jet toward or near the axis of the orifice 1 is formed. 2. The gas-liquid mixing spray nozzle device according to claim 1, wherein the space 4 is formed in an annular shape. 3. The gas-liquid mixture spray nozzle device according to claim 1 or 2, wherein the inclined flow path 7 is formed in an annular shape. 4 Utility model registration claim 1 or 2, wherein the inclined flow path 7 is composed of a plurality of flow path portions 7a formed at predetermined intervals in the circumferential direction.
The nozzle device for gas-liquid mixture spraying described in 2. 5. The inner circumferential surface 2a of the injection pipe 2 at the location where the orifice 1 is formed is formed into a tapered curved surface whose diameter becomes smaller toward the orifice 1. Claims 1 to 4 A nozzle device for a gas-liquid mixture spray according to any one of the items.