JPS6036345Y2 - spray nozzle - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a spray nozzle.

Conventional spray nozzles that atomize liquids with high vapor pressure at room temperature, such as LPG, at a spray pressure below the vapor pressure have the biggest problem when some of the liquid vaporizes and becomes a gas-liquid two-phase flow that is supplied to the nozzle. This causes a so-called vapor lock phenomenon in which the nozzle tip is filled with vapor and the liquid is intermittently sprayed.

The present invention aims to provide a spray nozzle that prevents this vapor lock phenomenon.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The spray nozzle of the present invention will be described below based on exemplary drawings.

In FIGS. 1 and 2, 1 is the main body of the LPG spray nozzle, 2 is the LPG flow path, and 3 is a swirling chamber recessed in the LPG flow path 2 at the tip of the nozzle body 1, A plurality of slits 4 are provided in the tangential direction on the circumferential side of the swirling chamber 3.

Reference numeral 5 denotes a nozzle tip that is joined to the tip of the nozzle body 1, and a gas-liquid separation chamber 6 that is continuous with the swirling chamber 3 is formed inside.

A large number of liquid spray holes 7 are provided on the outer periphery of the end surface of the nozzle chip 5, and one or more gas vent holes 8 are provided in the center.

The spray angle θ of the liquid spray hole 7 can be set to any angle between 0° and 180°.

The area of the gas vent hole 8 is 1% to 4% of the area of the liquid spray hole 7.
It may be 0%, but preferably 5% to 25%.

In the above configuration, part of the LPG is vaporized and becomes a gas-liquid two-phase state, but the flow velocity is set to 3 m/sec or more so that it becomes a bubble flow or a spray flow in the piping until it reaches the nozzle body 1.

Gas-liquid two-phase LPG flows through the channel 2 of the nozzle body 1, is supplied tangentially into the swirling chamber 3 through the slit 4, is given a swirling force, and enters the gas-liquid separation chamber 6.

Here, the gas and liquid are separated by centrifugal force, and the liquid is separated into the gas-liquid separation chamber 6.
The liquid is sprayed from the outer periphery of the liquid through the liquid spray holes 7.

The gas is discharged from the center of the gas-liquid separation chamber 6 through the gas vent hole 8, and does not remain in the nozzle.

In place of the slit 4, a tangential through hole 14 may be provided on the circumferential side of the swirling chamber 3, as shown in FIG.

The cross-sectional shape of the through hole 14 may be various shapes other than a circle, such as an ellipse or a polygon.

Also, instead of the swirling chamber 3, the nozzle body 1 and the nozzle tip 5
As shown in Fig. 4, there is a diagonal hole 2 between the
4 can also be provided.

It is preferable that the horizontal swing angle α of the diagonal hole 24 is 10° to 60°, and the vertical swing angle P is -60° to +60'.

In the flow path 2 of the nozzle body 1, a swirling ribbon-shaped spiral mixer 9, line mixer, etc. as shown in FIG. It is also possible to feed the gas into the gas-liquid separation chamber 6 by applying force.

In this case, it is also possible to omit the turning chamber 3 and the turning plate 13.

Furthermore, in place of the gas vent hole 8 on the end face of the nozzle chip 5, a sixth
As shown in the figure, a large diameter window is provided using porous sintered metal 10.
You can also insert it.

According to the spray nozzle of the present invention, the fluid supplied into the nozzle as a gas-liquid two-phase flow is separated into an outer liquid and an inner gas by centrifugal force in the gas-liquid separation chamber, and the end surface of the nozzle tip is Since the liquid is injected separately from the outer periphery and the center, there is no risk of gas filling the nozzle and ejecting from the liquid spray hole, causing a vapor lock phenomenon.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention, Fig. 2 is a horizontal and vertical sectional view and a longitudinal sectional view of the main part, and Figs. 3 and 4 are front views of the main part of other embodiments. FIGS. 5 and 6 are longitudinal sectional views of main parts of different embodiments, respectively. 1... Nozzle body, 3... Turning chamber, 1
3... Turning plate, 4... Slit, 14
...Through hole, 24...Diagonal hole, 5...
... Nozzle tip, 6... Gas-liquid separation chamber, 7.
...Spray hole, 8...Gas vent hole, 9...
...Spiral mixer, 10...Sintered metal.

Claims (1)

[Scope of utility model registration request] A spray nozzle that has a gas-liquid separation chamber for swirling fluid in the nozzle chip, has a large number of liquid spray holes on the outer periphery of the end surface of the nozzle chip, and has a gas vent in the center.