JPS5864148A - Spray tip - Google Patents

Abstract

PURPOSE:To make it possible to carry out uniform right cone shaped spraying over the entire circle thereof, by injecting a liquid introduced from a notch communicated with a liquid inflow passage from a diffusion part through a groove part, a contraction part and a parallel throat part. CONSTITUTION:A notch 4a communicated with a liquid inflow passage is formed to the outer flange part of a back surface side of an almost disc shaped member and a conical contraction part 4b of which the diameter becomes small toward the front surface side thereof is provided to the central part of the back surface side in a recessed form. Plural groove parts 4c, 4d communicated with the contraction part 4b and the notch 4a are provided by engraving at equal angles toward the center of the contraction part 4b and, on the other hand, a parallel throat part 4e parallel with the axis thereof is provided to the center of the contraction part 4b by drilling. In addition, a conical diffusion part 4f of which the diameter becomes large toward the front surface side from the front end of the parallel throat part 4e is formed so as to inject a liquid from the diffusion part 4f through the notch 4a, the groove parts 4c, 4d, the contraction part 4b and the parallel throat part 4e. That is, an almost equal amount of a liquid is injected to the central part and the peripheral part in the diffusion part 4f and right cone shaped spraying is carried out in a uniform liquid amount.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spray tip, and particularly to a spray tip that sprays a full cone with a uniform amount of liquid over the entire surface. .

When it is desired to spray an object uniformly all around the object, a so-called full-cone spray nozzle is used, but conventional full-cone spray nozzles of this type cannot easily spray uniformly all over the object. That is, conventionally, the shape of the spray tip that is replaceably attached to the nozzle body was formed as shown in FIGS. When the chip 2 shown in FIG. 8 is used, as shown by the thin line in FIG.
Therefore, the amount of spray differs from the ideal spray amount shown by the dashed line C in FIG.

This invention has been made in view of the above-mentioned problems, and is a spray tip that is shaped so that the spray amount is as shown by the chain line C in FIG. We aim to provide the following.

Hereinafter, this invention will be explained in detail with reference to the embodiments shown in FIG. 4 and below.

In FIG. 4, 1 is a substantially cylindrical metal retainer, 2 is an adapter connected to the rear end of the retainer 1, 8 is locked to the rear end flange 1a of the retainer 1 and screwed into the adapter 2, and the retainer 1 is screwed into the adapter 2.
This is a cap for fastening and fixing the adapter 2 and the adapter 2.

A ceramic spray tip 4 is removably fitted into the front end of the retainer 1, and a spray tip 4 is attached to a locking portion 1b protruding inward from the front end circumference of the retainer 1.
is locked. The outer surface of the locking portion 1b is formed into a tapered shape that becomes larger in diameter toward the outside.

Inside the retainer 1, a ceramic closer 5 is installed at the rear end of the spray tip 4 and a rubber cushion 6 is installed at the front end.
Metal strainer holder 7 fitted and held through
into the outer wall threaded part 7a of the strainer holder 7.
is screwed onto the threaded portion IC at the rear of the inner circumferential surface of the retainer 1.

As shown in FIG. 6, the strainer holder 7 has a substantially cylindrical strainer attachment part 7C attached to the support shaft 7b,
A strainer 8 is externally fitted into the strainer attachment part 7''C.The front half side beam of the strainer holder 7 is fitted into the retainer 1, and the rear half side is fitted into the adapter 2 with a gap. The adapter 2 has a liquid supply means (
(not shown), and the liquid supplied to the adapter 2 passes through the strainer 8 through the gap S1 between the outer circumferential surface of the strainer holder 7 and the inner circumferential surface of the adapter 2, and then passes through the strainer 8 provided in the strainer mounting portion 7C. The hole 7d leads to the gap S between the support shaft 7b, and the front end of the support shaft 7b extends from the gap St.
Pass through the gap S between the outer peripheral surface of the rubber rod 6 and the ceramic closer 5 and the inner peripheral surface of the retainer 1, and reach the back side of the spray tube 4 at the front end of the retainer 1. There is. In this way, the above gap S1 +82
+S11 is configured as a liquid inflow path.

The spray tip 4 has the shape shown in FIGS. 8 to 11, and is approximately disk-shaped so that its outer circumferential surface is tightly fitted to the inner circumferential surface of the retainer 1. On the back side of the spray tip 4, a stepped notch 4a is formed at the outer peripheral edge,
A pair of grooves 4c are formed in the center of the back surface to communicate with the gap S, and form a conical contraction part 4b that becomes smaller in diameter toward the axis OK, and communicate the contraction part 4b with the notch 4a.
.

4d is engraved on the back. The grooves 4c and 4d are radial grooves extending from the outer peripheral end toward the axis.
and 4d are spaced apart by 180 degrees, so that groove 4
The opening ends of C and 4d on the concave side are located at opposite positions. Note that the number of grooves 4c and 4d is not limited to two, and for example, four may be provided, but the grooves must run straight from the outer peripheral end toward the axis 0, and the angles between the grooves must be the same. Therefore, when two grooves are carved, the intervals are 180 degrees, and when four grooves are carved, the intervals are 90 degrees.

A parallel throat portion 4e is formed at the center (axis center) of the contraction portion 4b in parallel with the axis toward the front side, and a large diameter tapered portion continues from the front end of the parallel throat portion 4e. A diffusion portion 4f is formed. At the outer periphery of the front end of the diffusion section 4f, V
A water cutter 4g in the shape of a letter is carved, and a horizontally continuous concave step 4h is formed at the outer peripheral end of the water cutter 4g, and a large diameter taper tapers from the outer peripheral end of the step 4h toward the front end surface. Diffusion part 4
forming a plate. From the parallel throat section 4e to the diffusion section 4f
The connecting portion from the diffusion portion 4f to the uncut portion 4g is also a curved surface. The upper inclination angle α4 is appropriately set to 115 degrees or the like.

When the spray tip 4 having the above shape is used, the liquid flowing into the notch 4a from the gap S3 flows into the groove 4c.

The liquid flows from the contraction part 4d facing the contraction part 4b, passes through the parallel nozzle part 4e from the contraction part 4b, and is diffused and injected from the diffusion part 4f to form a full cone spray. At this time, liquid smoothly flows into the constricted portion 4b toward the parallel throat portion 4e of the axis. In the parallel throat section 4e, the amount of liquid at the center is slightly larger than at the periphery, and when the liquid flows out from the parallel throat section 4e to the diffusion section 4f, the liquid is diffused from the center to the periphery. The liquid is injected in substantially equal amounts to the area and the surrounding area. Therefore, a full conical spray is performed with an even amount of liquid in the spray range of the object to be sprayed. When the object sprayed using the spray tube 4 was inspected with an inspection machine, it was found that the ideal full conical spray shown in FIG. 8C was formed.

As is clear from the above description, the spray tip according to the present invention has a shape in which a groove for liquid inflow extending toward the center of the central contraction part is carved on the back surface on the liquid inflow side. A parallel throat part parallel to the axis is bored in the center of the contraction part, and a diffusion part is provided on the front surface of the injection side in communication with the parallel throat part, so that the liquid jetted from the diffusion part spreads over the entire injection surface. A uniform amount of liquid is injected, creating an accurate, full-cone spray. Furthermore, since the draining section is provided on the outer periphery of the diffusion section at the end of spraying, the water is drained and no droplets drip onto the object to be sprayed at the end of spraying.

There is no clogging, and it can always operate reliably. Further, since only a groove is formed on the back side of the spray tip and only one hole is formed, the structure is simple and processing is easy. Further, when the spray tip is made of ceramic, it has various effects such as strong chemical resistance and abrasion resistance, is suitable for applications that apply large hydraulic pressure, and has a wide range of applications.

[Brief explanation of the drawing]

FIG. 1(A) is a plan view of a conventional spray tip, FIG. 1(B) is a sectional view of FIG. 1(A), and FIG. 2(A) is a plan view of another conventional spray tip. Figure 2 (B) is shown in Figure 2 (
A) is a sectional view, FIG. 3 is a graph comparing the action of a conventional spray tip and an ideal action, FIG. 4 is a front view of the spray nozzle according to the present invention, and FIG. 5 is a bottom view of FIG. 4. , FIG. 6 is a sectional view of the main part of FIG. 4, FIG. 7 is a bottom view of FIG. 6, FIG. 8 is a plan view of the spray tip, and FIG. 9 is a sectional view of the main part of FIG.
The bottom view of the figure, Figure 10 is a sectional view taken along the line X-X of Figure 9, and the first
FIG. 1 is a sectional view taken along the line Y--Y in FIG. 9. 1... Retainer 2... Adapter 3... Cap 4... Spray tip 4a... Notch 4b.
... Contraction parts 4c, 4d...Groove part 4e...Parallel throat part 4f...Diffusion part 4g...Draining part 5...Closer-6...Cushion 7...Strainer-Boulder-8 --Strainer-0 Patent Applicant: Ikeuchi Co., Ltd. Agent: Patent Attorney: Seihaku Ao et al. 2 Arrests Figure 1 Figure 2 (A) (A)

Claims (1)

[Claims] (1) A notch that communicates with the liquid inflow path is formed on the outer edge of the back side of the approximately disk shape, and a conical contraction part that becomes smaller in diameter toward the front side is recessed in the center of the back side, and the contraction A plurality of grooves are carved at equal angles toward the center of the constriction part to communicate between the part and the notch, while a parallel throat part parallel to the axis is bored in the center of the contraction part, and the grooves of the parallel throat part are A spray tip characterized in that a conical diffusion part is formed with a diameter increasing toward the front side from the front end, and liquid is sprayed from the diffusion part through the notch, the groove part, the constriction part, and the parallel throat part. .