JP2005279354A - Diffusion nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diffusion nozzle spraying a fluid radially with a wide angle and permitting thinning of the outside diameter of the nozzle while ensuring a sufficient flow rate. <P>SOLUTION: This nozzle consists of a shaft 1 composed of e.g. a hollow pipe and arranged at the center of the nozzle, spraying pipes 2 arranged tightly around the outer periphery of the shaft 1 and wound spirally and an outer cylindrical tube arranged tightly on the outer periphery of the group of the wounded pipes 2 and coaxially with the shaft 1. The shaft 1 and the pipes 2 serve as a spraying outlet. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fluid (particularly liquid) spray nozzle for cleaning or the like, and more particularly to a diffusion nozzle for spraying fluid from a plurality of spray ports at a wide angle.

Conventionally, as a nozzle for diffusing and ejecting a liquid at a wide angle, a plurality of holes serving as ejection ports are arranged on the inclined surface or spherical circumference of a conical or hemispherical nozzle, and the liquid is ejected obliquely outward. As a specific nozzle of this type, for example, a plurality of injection holes are arranged in the normal direction of the conical surface along the circumference surrounding the middle of the conical surface that is not wrinkled, and the liquid is sprayed at a wide angle. In addition, there is disclosed a spraying nozzle as disclosed in Patent Document 1 that is configured to inject into the central portion.
Japanese Utility Model Publication No. 49-79013

However, the tip of these nozzles is in the form of a hollow cap formed integrally, and a plurality of holes serving as injection ports are formed on the same circumference (at least 6 when spraying uniformly over the entire circumference). It is necessary to provide a sufficient size for the necessary and sufficient spraying amount. On the other hand, when the liquid is ejected, a high pressure is applied to the tip of the nozzle. Therefore, it is necessary to ensure a certain level of strength, and from the viewpoint of preventing damage to the nozzle and the like, it is also necessary to keep the gap between the holes moderately. This type of nozzle is required to have a certain thickness, and there is a problem that there is a limit to reducing the diameter. Further, even if these are reduced in diameter as much as possible, since the parts are correspondingly reduced, there is a problem that, for example, drilling with a small diameter is required, and manufacturing and processing become difficult.
For this reason, in these conventional nozzles, it is also assumed that it is difficult to insert the nozzle into the inside of a deep hole with a deep depth, for example, the inside of a bottomed screw hole. There is a possibility that a sufficient cleaning effect cannot be expected in response to a desire to clean cleanly. In particular, it becomes more difficult if the internal shape is a complicated workpiece.

Therefore, the present invention is capable of ejecting fluid in a wide-angle and radial manner, and has a configuration that can easily reduce the outer diameter of the nozzle while ensuring a sufficient flow rate. The problem was to provide a diffusion nozzle that could be cleaned efficiently even inside a narrow frontage.

  The diffusion nozzle of the present invention includes a shaft body arranged at the center of the nozzle, a plurality of spray pipes that are in close contact with the outer periphery of the shaft body and wound spirally, and serve as fluid ejection ports. The outer pipe is provided in close contact with the outer periphery of the injection pipe group and provided coaxially with the shaft body.

If necessary, the shaft body may be formed of a hollow pipe and may be configured to be an injection port together with the injection pipe.

The injection pipe is preferably wound around the shaft body in a state where a plurality of pipes are in close contact with each other in parallel.

Furthermore, it is preferable that the shaft body, the injection pipe, and the outer tube are constituted by stainless steel pipes.

In addition, it is more preferable that the tip of the nozzle has a hemispherical shape, a conical shape, a truncated hemispherical shape, or a conical shape.

According to the diffusion nozzle of this configuration, the fluid that has passed through the spiral pipe becomes the tip of the pipe by a configuration in which a plurality of injection pipes are closely attached to the outer periphery of the shaft body and wound spirally. The fluid ejection direction ejected from the ejection port is obliquely outward with respect to the axial direction of the shaft body, which is the traveling direction immediately before the spiral cut surface. A large number of these injection pipes are provided, and further, these are arranged in close contact with each other in parallel, so that the fluid ejected from each ejection port is ejected in a wide-angle radial pattern as a whole.
Also, the fluid that has rotated inside the spiral pipe can be expected to be dispersed and ejected at a wider angle than the fluid that has passed through the straight pipe due to the inertia of the rotation.
Furthermore, since the injection pipe is cut perpendicularly to the axial direction at the tip that becomes the injection port, the pipe cutting surface is not a circle but an ellipse, and the area of the injection port can be made larger than a circle. Therefore, there is an effect that the injection amount can be increased.

Further, when a hollow pipe is used for the shaft body and the injection pipe is used as an injection port, the fluid is also injected from the injection port of the shaft body in the axial direction of the nozzle, whereby a fluid injection zone (fluid is injected) The fluid is reliably ejected also to the central portion of the region) where the region is regarded as a surface, and the fluid ejection pattern can be made solid and uniform.
Furthermore, since the shaft body, the injection pipe, and the outer tube are cylindrical, a gap is created when they are brought into close contact with each other, and by not filling the gap, a small amount of fluid flows from the gap. Since it is injected, the area of the jet outlet can be made larger.

In addition, since the nozzle according to this configuration combines only pipe-shaped members, and the cut portion of the pipe lumen directly serves as a spray port, the area of the hole (injection of fluid) as in the case of providing a hole in the cap-shaped member. In order to secure the same outflow amount, it is not necessary to set the size and outer diameter in consideration of the strength, and structurally it is not necessary to reduce the nozzle diameter. The limit can be reduced. In addition, if the shaft body, the injection pipe, and the outer cylinder tube are made of stainless steel pipes, they have sufficient strength even if they are thin, so a large inner diameter (injection port) can be secured. This effect can be expected to be further increased by ensuring the ejection amount even if the diameter of the nozzle is reduced.
In addition, if each part is made of stainless steel pipe and a plurality of injection pipes are spirally wound around the outer peripheral surface of the shaft body, the shaft body can be self-held without any fixing means experimentally. It is basically possible to manufacture by simply bringing the outer tube into close contact with the outer peripheral surface of the injection pipe group and fixing it by welding or the like, and it does not require particularly difficult processes or complicated parts. Is an easy nozzle.

Furthermore, if the tip of the nozzle is formed in a hemispherical shape, a conical shape, or a truncated conical shape, the exposed portion of the jet outlet becomes larger in the diagonally outward direction, so that the ejection amount is increased and the diagonal direction is further increased Fluid can be ejected at a wide angle.

When these actions are combined, it is possible to eject the fluid in a wide-angle and radial manner, which is the subject of the present invention, and easily reduce the outer diameter of the nozzle while ensuring a sufficient flow rate. Diffusion nozzle that can be cleaned efficiently by setting the outer diameter of the nozzle that can be inserted into the inside of a narrow and wide front opening, for example It can be.

Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of a front end portion of a diffusion nozzle showing an embodiment of the present invention, and shows a cross section of only an outer tube in order to show a part (lower part of the drawing) of the internal structure. A shaft pipe located inside the injection nozzle is indicated by a dotted line. FIG. 2 is a cross-sectional view taken along the line AA in FIG.
The diffusion nozzle of the present embodiment is closely wound around the shaft pipe 1 made of a hollow pipe located at the center and the outer periphery of the shaft pipe 1, and a plurality of (in this example, eight) are tightly wound. It is basically composed of an injection pipe 2 and an outer tube 3 provided in close contact with the outer periphery of the wound injection pipe 2 group and provided coaxially with the shaft pipe.
The shaft pipe 1 is made of a stainless steel pipe, and is located at the center of the nozzle. The tip of the shaft pipe 1 serves as the fluid injection port 10 in the axial direction, and at the same time, the shaft pipe 1 serves as a shaft for winding the injection pipe 2. ing.
The injection pipe 2 is made of a stainless steel pipe. In this example, the eight pipes are in close contact with each other in parallel, and are wound in a spiral manner in close contact with the outer periphery of the shaft pipe 1. , Each is a fluid ejection port 20 obliquely outward with respect to the axial direction of the nozzle. The fixing means for the shaft pipe 1 is not provided in this example because it is experimentally self-held, but a part thereof may be fixed by bonding, welding or the like, if necessary. Further, the number of the injection pipes 2 to be wound is preferably a large number in order to spray evenly over the entire circumference, and a smaller number is advantageous in order to secure an outflow area (outflow amount). A balanced quantity may be selected in consideration of the winding angle, but considering the former, six or more are recommended.
The outer tube 3 is composed of a stainless steel pipe having an inner diameter suitable for the outer periphery of the wound injection pipe 2 group. The outer tube 3 is in close contact with the outer periphery of the injection pipe 2 group and is coaxial with the shaft pipe 1. The tip is fixed by welding with a pipe or the like, and the tip is cut together with the shaft pipe 1 and the injection pipe 2 and then polished so that the entire nozzle tip becomes a hemispherical shape. On the other hand, the base end (not shown) is connected to a fluid supply device or the like by an appropriate means not specified.

The positional relationship of each part will be described repeatedly with reference to the cutaway view of FIG. 2. A shaft pipe 1 having a lumen as a fluid passage 11 in the axial direction at the center, and eight lumens around the shaft pipe 1. Is formed by coaxially arranging the outer pipe 3 around the outer periphery of the group of the eight injection pipes 2 and the injection pipe 2 having the fluid passage 21 obliquely outward of the nozzle. Is also formed as a pipe-shaped nozzle as an auxiliary injection port. In addition, if the length of the shaft pipe 1 and the injection nozzle 2 is 10 mm or more from the tip, wide-angle and radial injection is possible, and it is not necessary to be inserted over the entire nozzle that is the length of the outer tube 3. (See Figure 1)

Here, the manufacturing process of the present diffusion nozzle will be briefly described.
1. Eight injection pipes 2 are spirally wound around the outer periphery of the shaft pipe 1 without a gap.
2. Cut the wound nozzle to about 15 mm.
3. The nozzle is inserted into the outer tube 3 with the front end aligned, and fixed by welding.
4). The tip is polished so as to be a hemispherical surface as a whole.
The diffusion nozzle of the present embodiment is basically manufactured through the above steps.

  FIG. 3 is a photograph showing a state in which water is jetted from the diffusion nozzle of the present embodiment, in which water is jetted in a wide-angle and radial direction from the tip of the pipe-like nozzle in the nozzle axial direction and diagonally outward of the nozzle. Can be confirmed.

The side view which shows the diffusion nozzle front-end | tip part of embodiment of this invention AA sectional view of the embodiment Photograph showing water injection state by diffusion nozzle of the embodiment

Explanation of symbols

1. Shaft pipe 10. Injection port (shaft pipe)
11. Fluid passage (shaft pipe)
2. Injection pipe
20. Injection port (injection pipe)
21. Fluid passage (injection pipe)
3. Outer tube 4. Gap

Claims (5)

In a nozzle for ejecting a fluid at a wide angle, a shaft body arranged at the center of the nozzle,
A plurality of injection pipes that are in close contact with the outer periphery of the shaft body and spirally wound and serve as fluid injection ports;
A diffusion nozzle comprising an outer tube provided in close contact with the outer periphery of the wound jet pipe group and provided coaxially with the shaft body.   The diffusion nozzle according to claim 1, wherein the shaft body is configured by a hollow pipe and is configured to be an injection port together with the injection pipe.   The diffusion nozzle according to claim 1, wherein the injection pipe is wound with a plurality of pipes being in close contact with each other in parallel.   The diffusion nozzle according to claim 1, wherein the shaft body, the injection nozzle, and the outer tube are made of stainless steel pipes. The diffusion nozzle according to claim 1, wherein the nozzle tip is configured in a hemispherical shape, a conical shape, or a truncated hemispherical shape or a conical shape.