JPS6212439Y2 - - Google Patents

Description

[Detailed description of the invention] This invention sprays the liquid itself in a fan shape under relatively high pressure, and at the same time applies relatively low pressure to surround the spray from near the base end of the injected spray. This invention relates to a special structure of a pressurized air-liquid type flat spray nozzle that supplies air to promote atomization and suppress scattering.

When using this type of pressurized gas-liquid spray nozzle, it is possible to adjust the pressure of both gas and liquid separately to change the spray angle, increase or decrease the volume of discharged liquid, and change the degree of atomization. When the air pressure is changed, the ejected air may become irregular due to a swirling effect due to a slight imbalance in the shape of the base end flow path of the jet nozzle, and as a result, the spray pattern differs from the oval shape. There is a drawback that it tends to become S-shaped or asymmetric.

In order to address the above-mentioned drawbacks, the present invention is characterized by providing a flow rectification path by grooves or protrusions adapted to regulate the direction of air flow upstream of the jet nozzle near the jet port. Hereinafter, embodiments illustrated in the accompanying drawings will be described in detail.

As shown in FIGS. 1 and 2, the spray nozzle to which the present invention is applied includes a spray nozzle 1 as shown in FIGS.
In addition to forming a dome-shaped concave cavity that is open at the rear in the approximately short cylindrical main body, a groove with a V-shaped or U-shaped cross section is provided at the front end so as to appropriately intersect with the concave cavity. As a flat blowing mold made of cemented carbide with a shaped orifice type spout 2,
This jet nozzle 1 is fitted in a protruding state at the front end of a holder 5 with a flange 4 having air supply holes 3, 3 and a forward-facing tapered surface, and the jet nozzle 6 has a mounting flange 7 at the rear end. The jet nozzle body 8 has a tapered surface matching the tapered surface of the holder 5, and a dome-shaped concave cavity 9 is provided in the rear open state, and a groove having a V-shaped, U-shaped, or rectangular cross section is provided at the front end. 10 is provided so as to intersect appropriately with the concave cavity 9 to open a substantially lip-shaped jet nozzle 11, and the jet nozzle 1 is attached to such a jet nozzle 6 together with a holder so that the protrusion of the jet nozzle is The holder 5 and the main body are fitted in the dome-shaped concave cavity 9 in such a way that they are fitted in the same axial relationship due to the close contact of their tapered surfaces, and the phases of the jet nozzle 2 and the nozzle nozzle 11 are made to match. A position regulating device consisting of a protrusion 12 and a groove 13 is provided at the fitting part with the gun 14, and with this device attached to the tip of the gun 14 with a nut 15, paint etc. can be applied at a timely manner. Supply liquid and air separately from liquid spout 2
At the same time, a relatively high pressure liquid of about 20 to several + kg/cm ² is sprayed in a fan shape, and at the same time one to several
It is appropriate to adopt a type in which pressurized air at a relatively low pressure of about Kg/cm ² is ejected in a fan shape so as to surround the fan-shaped spray.

The special structure of this invention for the above model is as follows:
A rectifying passage 16 adapted to prevent swirling is formed upstream near the jet nozzle 11, and for example, grooves 17, 17 communicating with the dome-shaped recess 9 are formed radially and symmetrically on the rearward inner wall surface of the jet nozzle main body 8. This allows the pressurized air to be supplied to the jet nozzle 11 without swirling or drifting, thereby preventing the shape of the fan-shaped spray from being disturbed. The number may be any number as long as it is line symmetrical about the fumarole 11, and the direction thereof may be in the shape of +, -, or
The groove 17 can be formed in a variety of shapes, such as a U-shape, a U-shape, and a V-shape, a U-shape, etc., in addition to the square shape. The groove 7 may be formed to be inclined with respect to the axis of the jet nozzle, and the width of the groove 17 may be gradually narrowed or expanded downstream in both of the above embodiments.

In addition, when forming the flow straightening path 16, apart from the above-mentioned embodiment, a protrusion 17' can be provided as shown in FIGS. The number and direction of the protrusions 17' can be selected from various options as in the case of the grooves 17, and the width of the protrusions 17' may be gradually narrowed or expanded downstream.

It goes without saying that the concave cavity 9 for forming the blowhole 11 may have a deformed dome shape such as a truncated cone shape, a cylindrical shape, a stepped cone shape, etc., as shown in FIGS. 7 to 9. In these cases, the grooves 17 or the protrusions 17' can have various shapes as in the above embodiments.

As explained above, according to the present invention, a jet nozzle formed by the intersection of a dome-shaped recess and a groove is created based on an extremely simple structure in which a flow rectification path is provided upstream connected to a dome-shaped recess. This has the effect of easily and reliably preventing irregularities and irregularities in the spray pattern due to swirling flow or drifting, which tend to occur in the pressurized gas-liquid flat spray nozzle that has been adopted.

[Brief explanation of the drawing]

In the drawings, FIG. 1 is a vertical side view showing a pressurized gas-liquid combination spray nozzle of the present invention in one embodiment, FIG. 2 is a vertical front view taken along the line - in FIG. 1, and FIGS. 3 and 4. 5 and 6 are longitudinal sectional side views and rear views respectively showing only other embodiments of the fume nozzle, and FIGS. 7 and 8. FIG. 9 and FIG. 9 are longitudinal sectional side views of only the essential parts of the jet nozzle, each showing still another embodiment. DESCRIPTION OF SYMBOLS 1... Liquid jet nozzle, 2... Liquid injection port, 6... Fuming nozzle, 9... Recess, 10... Groove, 11... Fuming port, 16... Rectifying channel.

Claims (1)

[Scope of utility model registration request] A comparatively high-pressure pressurized liquid is sprayed from a liquid jet nozzle 1 having a flat spray liquid spout 2, and
In order to supply a relatively low-pressure fan-shaped airflow to surround the spray from the spray nozzle 1, there is a jet nozzle 11 formed by the intersection of a dome-shaped or modified dome-shaped concave cavity 9 and a groove 10. Fumarole nozzle 6
The spray nozzle is a pressurized gas-liquid type spray nozzle, which is provided so that the liquid spray nozzle is surrounded from the front, and is provided with a rectifying passage 16 regulated by a groove or a protrusion upstream that connects to the recess 9.