JPH0153585B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention sprays high-pressure liquid to remove scale from a metal surface, remove viscous substances such as paint adhering to an object, or remove dust adhering to the surface of an object. This is a nozzle device that performs the removal of substances and also cleans the surface of objects.

Prior Art Conventionally, in the above-mentioned nozzle device, the degree of spray expansion of the liquid is changed depending on the purpose of the work, and when it comes to scales, viscous substances, etc. that are difficult to remove, the degree of spray expansion is reduced to zero and the jet pressure of the liquid is increased. For surface cleaning, operations such as increasing the spray range and weakening the jet pressure of the liquid are performed, but each time, the nozzle with the desired spread is replaced and sprayed. Alternatively, as shown in Fig. 5, the tip of the injection tube T is branched into two branch tubes T ₁ and T ₂ , and nozzles N with different injection expansion degrees α and α′ are installed at each tip. ₁ , _N2 is fixedly attached, and a branch pipe is installed at the branch part.
Insert one ball valve V equal to the inner diameter of T ₁ and T ₂ ,
If the branch part T ₁ is on the upper side and the branch pipe T ₂ is on the lower side,
Since the ball valve V closes the flow path of the branch pipe T ₂ , the liquid is injected from the nozzle N ₁ , and when used with the branch pipe T ₂ on the upper side, the flow path of the branch pipe T ₁ is blocked by the ball valve V. The liquid was then injected from the nozzle _N2 , making it possible to select liquid ejection with two types of ejection apertures.

Problems to be Solved by the Invention In the former device, the nozzle must be replaced every time the injection aperture degree is changed, which not only makes the replacement work cumbersome, but also requires the operator to replace unnecessary nozzles. The latter often causes powder to be lost, which significantly impedes work efficiency.Also, although the latter is easy to change the injection aperture, since only two types of injection aperture can be selected, the range of intended use is limited. When three or more types of injection expansion degrees are required, this method has the same disadvantage as the former, and furthermore, the nozzle must be used while paying careful attention to its vertical position, which reduces the degree of freedom in operating posture. This is extremely restrictive.

Therefore, the object of the present invention is to eliminate both of the above-mentioned drawbacks and to provide a nozzle device that can select three or more types of injection expansion degrees without replacing the nozzle.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention includes a nozzle tube that is biased to protrude and is fitted to the tip of the injection tube, and an eccentric disk is eccentrically fixed to the outer periphery of the tip of the injection tube. A nozzle holder is fastened to the eccentric disk with a cap nut, a nozzle is fixed to the nozzle holder, and the nozzle has an injector on a circumference whose radius is the eccentricity of the tip position of the injection pipe with respect to the center of the eccentric disk. A plurality of nozzle holes with different degrees of expansion are provided through the nozzle holes, and when the cap nut is fastened, the rear end surface of the nozzle moves toward the front side of the eccentric disk and presses against the tip of the nozzle pipe, thereby causing constant angle rotation of the nozzle holder. This is a nozzle device in which the nozzle 6 is rotated around the center of the eccentric disk 5 by movement, and the plurality of nozzle holes are selectively communicated with the nozzle pipe, so that the degree of spray expansion can be adjusted in multiple stages.

Function: Since the high-pressure liquid that is pumped from the injection pipe is injected from the nozzle pipe through the nozzle, by rotating the nozzle holder at a fixed angle about the center of the eccentric plate, the desired nozzle hole is communicated with the nozzle pipe. It is possible to perform liquid injection with a desired degree of injection expansion by crimping.

Embodiment FIGS. 1 to 4 show an embodiment of the present invention, and the perspective view shown in FIG. 1 shows a nozzle pipe 3 fitted via a spring 2 to the tip of an injection pipe 1 having a spring receiving step formed on the inner surface. death,
A packing member 4 is attached to the distal end surface of the nozzle pipe 3.

In addition, the nozzle holder 7 has an eccentric disk 5 eccentrically fixed to the outer periphery of the tip of the injection pipe 1, and a nozzle 6 mounted and fixed on the same axis, as shown in FIG. By rotating the cap nut 8 that is threaded into the thread, the nozzle holder 7 is drawn toward the eccentric disk 5, and the rear end surface 6' of the nozzle 6 is moved toward the front of the eccentric disk 5 as shown in FIG. The center of the eccentric disk 5 and the center of the nozzle holder 7 are tightly held on the same axis.

As shown in FIG. 4, the nozzle 6 has four nozzle holes 6a, 6b, 6c, and 6d having different degrees of spray expansion, and a flange 7' formed on the nozzle holder 7.
Display marks 9a, 9b, 9c, and 9d, such as carved lines for indicating the degree of injection expansion in number, are provided on the outer periphery of the nozzle holder 7 in correspondence with the positions of the respective nozzle holes, and the nozzle holder 7 can be easily rotated. It has a polygonal shape.

Therefore, when the nozzle tube 3 is fastened as shown in FIG.
a, 6b, 6c, and 6d are all located on the circumference whose radius is the eccentricity of the tip position of the injection pipe 1 with respect to the center of the eccentric disk 5, so the nozzle holder 7 is placed concentrically with the eccentric disk 5. When rotated at a fixed angle, the nozzle holes 6a, 6b, 6c, and 6d are always in crimped communication with the nozzle pipe 3, and the high-pressure water in the injection pipe 1 passes through the nozzle pipe 3 to each selected nozzle hole 6a without leaking. ，
6b, 6c, and 6d, and is injected according to the injection expansion degree of the selected nozzle hole.

Effects of the Invention In the present invention, the degree of injection expansion can be adjusted in three or more stages by simply rotating the nozzle holder at a fixed angle, so there is no need for the complicated operation of replacing the nozzle. In addition, there is no accident of powder loss when replacing the nozzle, and the desired spray opening degree can always be selected reliably and smoothly without being affected by the working posture of operating the nozzle, so the spraying function has been significantly expanded. However, its practical effects are significant, such as being able to perform injection work more efficiently.

[Brief explanation of drawings]

Figures 1 to 4 show embodiments of the present invention. Figure 1 is a perspective view of the main part of the tip of the injection tube, Figure 2 is a front view of the nozzle holder, and Figure 3 is the tightening of the nozzle holder to the tip of the injection tube. FIG. 4 is a perspective view of the nozzle, and FIG. 5 is a sectional view of a main part of the tip of a conventional injection pipe. DESCRIPTION OF SYMBOLS 1... Injection pipe, 2... Biasing spring, 3... Nozzle pipe, 4... Packing member, 5... Eccentric disc, 6
... Nozzle, 7... Nozzle holder, 8... Nut.

Claims (1)

[Claims] 1. The injection pipe 1, the nozzle pipe 3 that is inserted into the tip of the injection tube with a protruding bias, the eccentric disk 5 fixed eccentrically to the outer periphery of the tip of the injection tube, and fastened to the eccentric disk with a cap nut 8. The nozzle holder 7 is fixed to the nozzle holder, and a plurality of nozzle holes 6a, 6b having different injection apertures are arranged on a circumference whose radius is the eccentricity of the tip position of the injection pipe 1 with respect to the center of the eccentric disk 5. 6c
The rear end surface 6' of the nozzle moves in the front direction of the eccentric disk 5 when fastened with the cap nut 8 and is crimped with the nozzle pipe 3, and the nozzle holder 7 The nozzle 6 is rotated around the center of the eccentric disk 5 by constant angle rotation, and the plurality of nozzle holes 6a, 6b, 6c... are selectively communicated with the nozzle pipe 3 to widen the injection. Nozzle device that can adjust the degree in multiple stages.