JPS59169557A - Spray apparatus - Google Patents

Abstract

PURPOSE:To provide a spray apparatus having a nozzle easy to fabricate, constituted of such a mechanism that a dish shaped bodies each provided with a recessed part are contacted through a flat plate provided with slits while a liquid is sent to each recessed part and injected through the slits to be formed into fine particles. CONSTITUTION:Flat surface parts are provided to the peripheral edge parts of two dish shaped bodies 1, 2 and the peripheral flat edge surface parts of both dish shaped bodies 1, 2 are opposed through a flat plate 5 having slits 6 extending to the peripheral edge thereof. In his state, when a liquid is sent to the recessed parts from a liquid feed pipe 7, it is injected from the nozzle orifice 9 formed between the dish shaped bodies 1, 2. In this case, the dish shaped bodies 1, 2 and the flat plates 5 are integrated by a screw 10 piercing therethrough. Therefore, when the screw 10 is made loose, dust clogging can be forcibly flowed by a liquid stream. In addition, if a barrier plate is provided in front of the nozzle orifice 9, the collision spraying of fine particles can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a spray device that can be used in combustion equipment, air conditioner layer spray devices such as internal combustion engine humidifiers, paint sprays, cooling devices for steel materials, etc. This provides a large improvement effect in terms of dust clogging, high precision, and jet flow characteristics.

Conventional structure and problems Single-hole nozzles have traditionally been used for impact atomization, manufacturing of synthetic fibers, fire hoses, etc., but single-hole nozzles are generally used for drilling circular holes, electric discharge machining, molding, etc. The machining limit is 0.1 word φ to Q, Q 5 Mφ.

Moreover, it was extremely difficult to ensure accuracy during mass production.

In addition, it was easy to get clogged with dust, and it was necessary to filter it with a liquid TM filter. Furthermore, the manufacturing cost of the nozzle is high, and it is not suitable for obtaining a large amount of spray with one nozzle and one hole. Therefore, in general, spraying using a single-hole direct nozzle is less common than using a pressure travel nozzle or a two-fluid nozzle.

The present invention is. Eliminate shortcomings, i.e., high precision, small hole diameter, and dust clogging <<, easy-to-manufacture nozzles to wealth.
7kopzuru. According to the present invention, a dish-like body having four parts is brought into contact with a flat plate having slits interposed therebetween, the liquid to be atomized is sent to the recessed part, the liquid is jetted from the slits, and the liquid is atomized. This is a spray device that atomizes the particles, and further aims at further fine atomization by colliding the jet stream with a collision plate.

Description of examples The details of the present invention will be explained below with reference to the drawings.

Figures 1 and 2 show an embodiment of the spraying device of the present invention. In addition, the same numbers are given to the elements passing through FIG. 1.

After the metal plates 1 and 2 are diverted into 2',
They merge at two parts of the nozzle hole 9 and are ejected as a liquid flow downstream of the nozzle hole 9. Furthermore, if a collision body is provided in front of the nozzle hole 9, collision atomization of fine particles can also be achieved.

Still, the plate-shaped bodies 1 and 2 and the flat plate 5 are the same as the plate-shaped body 1 and the flat plate 5.
They are integrated by a screw 10 passing through the slit 6, and no liquid leakage occurs from other than the slit 6. Furthermore, the opposing clamping of the two plate-like bodies 1 and 2 is released by loosening the screw 1o. In this state, the nozzle hole 9 formed by the slit 6
Since the top and bottom sides of the square are open, it is possible to easily wash away the clumped dirt with the liquid flow.

Furthermore, it is easy to disassemble and clean, and it is also easy to drive electrically using a solenoid or the like instead of using screws.

As described above, according to the present invention, an extremely small nozzle hole can be formed and the clogging of dust caused by the nozzle hole can be avoided.
It becomes possible to spray liquid with fine particle size.

FIG. 3 shows a different embodiment of the spray device according to the invention.

The bottom part 11 of the upstream dish-shaped body 2 has a larger area than the upper part of the dish-shaped body 2. If liquid pressure is applied to the nozzle in this state, the dish-like body 2 receives the liquid pressure from the pressure hole 10b and moves upward to the bottom 11, compressing the rubber ring 12 and moving the two dish-like bodies 1
, 2 are opposed to each other with flat plates interposed therebetween to form a nozzle hole 9. When the hydraulic pressure is lowered again, the plate-like body 2 is moved downward by the rubber ring 12, and the top and bottom of the flat plate 5 are released.

Also, at the moment of the clamping action of the flat plate against release, the liquid flows as if pushing out dirt. That is, the two sides of the rectangular nozzle are automatically opened using hydraulic pressure, allowing dirt to be easily pushed out.

By making the nozzle hole 9 have a rectangular cross section in which the width d of the slit 60 of the flat plate 5 is larger than the thickness t of the plate, when the opposing clamping of the plates 1 and 2 is released, the longer side of the nozzle hole 9 By releasing two sides (width d), garbage can be more effectively discharged.

In FIG. 4, the shape of the slit 6' of the flat plate 5' is widened 9 in the downstream direction of the liquid flow. If the slits are parallel or tapered, the debris in the liquid will be pushed into the narrow nozzle hole 9, and when the nozzle hole is closed, the debris will become wedge-like and hard, blocking the flow path. I end up. In order to avoid such a situation, it is preferable to form the slit to widen toward the end.

FIG. 5 is a schematic diagram of a spray device using the present invention. The liquid flow ejected from the nozzle hole 9 is a smooth jet flow, but since the cross section is square, the cross section of the jet flow is also square immediately after the nozzle hole 9 emerges. However, as the jet flows downstream, a circular force acts due to surface tension, and the cross section begins to transform from a square to a circle.

This movement causes the jet to vibrate violently and rapidly transform into a stream of droplets.

This phenomenon also occurs with circular hole nozzles, but according to our experiments, kerosene was heated to 8ν/
When the pressure of c〃) was applied, the distance at which the flow changed to such a droplet flow was about 1008.

On the other hand, for square nozzles having the same cross-sectional area, the distance was about 40M. When the droplets thus obtained are applied to the colliding body 13, each drop forms a fine liquid film on the collision surface, and the liquid film is divided to obtain a fine spray.

Since the nozzle 9 with a square cross section has a shorter distance from the impacting body '13 than the circular nozzle, the entire device can be made extremely compact.

Furthermore, since the nozzle hole diameter can be made extremely small due to the structure, it is possible to perform finer spray than ever before.

Furthermore, as mentioned above, it has excellent features such as being less likely to get clogged with dust and being easier to process. Furthermore, even if no colliding body is provided in the droplet area, if a colliding body with an appropriate small diameter is used, it is possible to cause the colliding bodies to collide before the droplets form.

Effects of the invention■ It is easy to process slits on a flat plate, and if a quick microfabrication method such as etching is used, slits with a width of 100μ or less can be made with almost no unevenness, so there is no need to disturb the flow at the nozzle. A stable liquid flow can be obtained. Also, even if dirt gets mixed in, it won't get caught easily. (1) On the other hand, the periphery of the cane-shaped body can be easily polished, and no unevenness that would disrupt the flow through the nozzle hole is created, so the above effects are not impaired. ■The liquid introduction part is divided into two parts upstream of the nozzle hole, and the liquid flows into the nozzle hole through the narrow introduction part.

Generally, the Reynolds number, which indicates turbulent flow of liquid, is small in a narrow pipe, so if the introduction section upstream of the nozzle hole is divided into two, the flow velocity of each is the same as when it is not divided. The narrowness of the flow path is halved, and therefore the Reynolds number is also halved. In other words, the flat plate rectifies the flow of the liquid inlet, effectively preventing turbulence upstream of the nozzle and eliminating any negative effects on the liquid flow. ■With conventional hole processing, the size and shape of the nozzle could not be inspected non-destructively.
In this embodiment, this can be done by removing the bolts. ■Since the nozzle holes are formed by slits in a flat plate, multiple nozzle holes can be easily formed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts of a spraying device according to an embodiment of the present invention, FIG. 2 is a plan view of a flat plate which is a component of FIG. 1, and FIG. 3 is a main part of a spraying device according to a different embodiment of the present invention. FIG. 4 is a plan view of different embodiments of the flat plate, and FIG. 5 is a schematic diagram of an applied example of the present invention. 1.2...Dish-shaped body, 1', 2/...Liquid introduction part, 3...Concavity, 4, 4'...
Peripheral part, 5, 5'... Flat plate, 6, e/...
...Slit, 7...Liquid pipe, 8.8'...
...Bottom part, 9...Nozzle hole, 10.・1
oa, 1ob...hole, 13...collision body. Name of agent: Patent attorney Toshio Nakao and 1 other person = 3
: Figure 1 to Figure 2, Figure 3, Figure 6 (5', θ

Claims (1)

[Scope of Claims] (1) A flat part is provided at the peripheral edge of two plate-shaped bodies, and the flat parts of both plate-shaped bodies are opposed to each other with a flat plate having a slit extending along the periphery interposed therebetween. A spraying device characterized in that a means is provided for communicating a liquid feeding pipe between the space between the shaped bodies and the flat plate, and for releasing the clamping of the flat plate between the two dish-shaped bodies. (2) The spray device according to claim 1, characterized in that the plate-shaped bodies are held opposite each other by hydraulic pressure, and the clamping of the flat plate is released by a decrease in the hydraulic pressure. (3) The spraying device according to claim 1, wherein the width of the slit in the flat plate is larger than the thickness of the plate. (4) The spray device according to claim 1, wherein the width of the slit in the flat plate widens toward the downstream side. (6) The spray device according to claim 1, characterized in that an impactor is provided downstream of the nozzle hole formed by the slit in the flat plate.