JPH08103692A - Nozzle gun - Google Patents

Abstract

PURPOSE: To omit a special driving source for motion and to realize a simplified structure which does not impair the sealing performance and strength of an ultra-high pressure water nozzle gun provided with nozzles adapted to make motion, such as rotation, during injection of ultra-high pressure water. CONSTITUTION: A nozzle body 26 which injects the ultra-high pressure water from the nozzles 32 on its front end side is supported at a gun body 12 via a leaf spring 36 and is so formed that this nozzle body receives the supply of the ultra-high pressure water from an ultra-high pressure reciprocating pump from an internal high-pressure hose 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle gun used for chipping and the like, and more particularly to a nozzle gun for ejecting liquid while rotating a nozzle.

[0002]

2. Description of the Related Art In a nozzle gun used for chipping, peeling off adhered matter, deburring, cleaning, etc., the nozzle is rotated in order to spread the jetted portion of the jet from the nozzle in a planar manner.

In the conventional nozzle gun, in order to rotate the nozzle, a drive source such as an air motor is used, or a nozzle having a blade at its base end is arranged in a swirl chamber and liquid is applied to the blade under pressure. (Japanese Utility Model Publication No. 4-26049).

[0004]

When the nozzle gun is rotated by an air motor or the like, a separate drive source is required, and the nozzle rotation support mechanism and seal structure are complicated. Further, when the nozzle is rotated by using the pressure-fed liquid, the strength of the blade is impaired in the nozzle gun for ultra-high pressure in which the pressure-fed liquid has an extremely high pressure.

The object of the invention of claim 1 is simplified in a nozzle gun in which a nozzle is designed to move while ejecting a liquid, a special drive source can be omitted, and sealing performance and strength are not hindered. It is to realize the structure. An object of the invention of claim 2 is to further provide a nozzle gun capable of optimizing the movement trajectory of the nozzle. An object of the invention of claim 3 is to provide a nozzle gun capable of adjusting the moving speed of the nozzle.

[0006]

The present invention will be described using reference numerals in the drawings corresponding to the embodiments. In the nozzle gun (10) according to claim 1, the nozzle body (26) for supplying the liquid from the flexible conduit (18) and ejecting it from the nozzle (32) on the tip side,
Through the elastic member (36, 56) such as spring or rubber, the gun body (1
It is supported by 2).

According to the nozzle gun (10) of claim 2, claim 1
The nozzle gun (10) is further provided with guide windows (66, 68) surrounding the nozzle body (26) from the outer side in the radial direction.

In the nozzle gun (10) of claim 3, claim 1
Alternatively, in the nozzle gun (10) of 2, the elastic member (3
The spring constant of 6) is adjustable.

[0009]

In the nozzle gun (10) of claim 1, the pumped liquid from the pump is supplied from the flexible conduit body (18) to the nozzle body (26), and is supplied from the nozzle (32) of the nozzle body (26). Is jetted. The nozzle body (26) is given an oscillating force with the passage of the pressure-fed liquid, and moves at a natural frequency determined by the nozzle body (26) and the elastic members (36, 56). Thus, the nozzle (32) moves while ejecting the liquid.

In the nozzle gun (10) of claim 2, the nozzle body (26) has its movement direction defined by the guide windows (66, 68),
Exercise along the guide windows (66, 68).

In the nozzle gun (10) of claim 3, the elastic member
By adjusting the spring constant of (36), the natural frequency of the entire nozzle body (26) and elastic member (36) changes. This allows
The moving speed of the elastic member (36) changes, and the moving speed of the nozzle (32) also changes.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall view of an ultra high pressure water nozzle gun 10. The ultra-high pressure water nozzle gun 10 is used as ultra-high pressure water of hundreds to thousands of kgf /
It is intended to be used for operations such as chipping, delamination, deburring, and cleaning by being supplied with and spraying water having a water pressure of about a square cm. The gun body 12 includes a pipe portion having a predetermined length, is open at the front end side, and is provided with a connecting pipe 16 at the base end side. The two gun grips 14 are attached to the pipe portion of the gun body 12 at their upper ends at predetermined intervals in the longitudinal direction of the ultra high pressure water nozzle gun 10 and hang down from the gun body 12. The internal high-pressure hose 18 extends inside the gun body 12 and is connected to the connecting pipe 16 on the proximal end side. The external high-pressure hose 20 is connected to the discharge port of an ultra-high pressure reciprocating pump (not shown) at one end side (not shown), is connected to the connection pipe 16 at the other end through the connection fitting 22, and is connected by the hose cover 24. It is covered over the entire length. Nozzle body 26
Is a nozzle body 28 having a tip portion protruding from the tip of the gun body 12, a plurality of nozzles 32 arranged in a line in the vertical direction on the tip side, and a nozzle member 30 attached to the tip side of the nozzle body 28, and a nozzle body The connection fitting 34 connects the base end of 28 to the tip of the internal high-pressure hose 18. The leaf spring 36 is disposed in the tip end portion of the gun body 12, and the base end portion is fixed by the nut 40 and the guide plate 42.
It is fixed to.

FIG. 2 is an assembly state diagram of the nozzle body 28 and the leaf spring 36. The tip of the leaf spring 36 is fixed to the step on the tip side of the nozzle body 28 with a screw 44.

FIG. 3 is a perspective view of the leaf spring 36. Leaf spring 36
Is an intermediate inclined portion 46, a distal end side contact portion 48 connected to the distal end side of the inclined portion 46 and applied to the nozzle body 28, and a proximal end side connected to the proximal end side of the inclined portion 46 and applied to the inner peripheral surface of the gun body 12. The pad 50 is provided. The circular hole 52 is the tip side contact part
It is drilled in 48 and the screw 44 (FIG. 2) is inserted. The two elongated holes 54 are formed in the base end side contact portion 50, and the bolt 38 (FIG. 1) is formed.
Is movably inserted in the extending direction of the base end side contact portion 50.

FIG. 4 is a perspective view of the elastically deformable rod 56. The elastically deformable rod 56 is composed of one round rod, and an inclined portion 58 is provided in the middle portion.
Also, it has mounting portions 60 at both ends. The elastically deformable rod 56 is used in place of the leaf spring 36 shown in FIG. 3, and the mounting portions 60 at both ends are fixed to the nozzle body 28 and the gun body 12 by welding or the like. The elastically deformable rods 56 are both mounting portions in the direction orthogonal to the axial direction of the nozzle body 26.
Resilient to relative displacement of 60.

FIG. 5 shows the guide plate from the tip side of the nozzle body 28.
It is the figure which looked at 42. 1 and 5, the guide plate 42
Has a shape corresponding to the square contour of the tip opening of the gun body 12, and is fitted and fixed in the opening. Long window 66
It is formed vertically in the center of the guide plate 42 and has a nozzle body.
28 is slidably fitted in the long window 66 at the joint with the screw 44 in a vertically slidable manner. The horizontal width of the long window 66 is approximately equal to the diameter of the fitting portion of the nozzle body 28, and the vertical dimension thereof is about 2 to 3 times the diameter of the inserting portion of the nozzle body 28.

FIG. 6 is a view of another guide plate 42 seen from the tip side of the nozzle body 28. This guide plate 42 is the guide plate of FIG.
It is a substitute for 42, and a circular window 68 is formed in the central portion of the guide plate 42. The circular window 68 has a diameter of 28 nozzle bodies.
The nozzle body 28 is fitted with the elastically deformable rod 56 shown in FIG. 4, and is inserted into the circular window 68 movably in any direction within the plane of the circular window 68.

The operation of the super high pressure water nozzle gun 10 will be described. The ultra-high pressure water is pressure-fed to the internal high-pressure hose 18 of the ultra-high-pressure water nozzle gun 10 from the ultra-high-pressure reciprocating pump (not shown) via the external high-pressure hose 20. The ultra-high pressure water is introduced from the internal high pressure hose 18 into the nozzle body 26, reaches the nozzle 32 via the passage in the nozzle body 26, and is jetted from each nozzle 32. The nozzle body 26 is given an oscillating force as the ultrahigh pressure water passes through the passage. The internal high pressure hose 18
It is flexible and does not hinder the movement of the nozzle body 26. Thus, the nozzle body 26 and the leaf spring 36 try to move in the plane direction of the guide plate 42 at the natural frequency determined by the weight, the spring constant, and the like. The long window 66 of the guide plate 42 regulates the movement of the nozzle body 28 in the surface direction of the guide plate 42 in the up-down direction, whereby the nozzle 32 reciprocates in the up-down direction during the injection of the ultra-high pressure water.

By loosening the nut 40 to change the position of the bolt 38 in the elongated hole 54 of the leaf spring 36 and then tightening the nut 40, the fixing position of the leaf spring 36 to the gun body 12 is changed. Along with this change, the spring constant of the leaf spring 36 changes and the natural frequency of the nozzle body 26 and the leaf spring 36 also changes, so the vertical reciprocating speed of the nozzle 32 changes.

Instead of the guide plate 42 of FIG. 5, the guide plate 42 of FIG.
In the ultra-high pressure water nozzle gun 10 with the circular window 68 restricts the movement of the nozzle body 28 radially outward, so that the nozzle body 28 moves within the circular window 68. As a result, the nozzle 32 makes a rotary motion during the injection of the ultrahigh pressure water.

The ultra-high pressure water nozzle gun 10 of the embodiment is several hundreds.
Although it handles ultra-high pressure water of about several thousand kgf / square cm, the present invention is applicable without being limited to this water pressure nozzle gun. Further, it is also applicable to a nozzle gun for ejecting a liquid other than water.

[0022]

According to the first aspect of the invention, the liquid can be ejected from the nozzle while moving the nozzle by omitting a special drive source. Further, since the swivel joint for rotating the nozzle and the jetting of the jet flow to the blades can be omitted, the structure can be simplified, and the hindrance to the sealing performance and the strength can be eliminated.

According to the second aspect of the present invention, by providing the guide window, the movement trajectory of the nozzle body can be set appropriately.

According to the third aspect of the invention, the movement speed of the nozzle can be changed to an appropriate one by adjusting the spring constant of the elastic member.

[Brief description of drawings]

FIG. 1 is an overall view of an ultra-high pressure water nozzle gun.

FIG. 2 is an assembly state diagram of a nozzle body and a leaf spring.

FIG. 3 is a perspective view of a leaf spring.

FIG. 4 is a perspective view of an elastically deformable rod.

FIG. 5 is a view of the guide plate viewed from the tip side of the nozzle body.

FIG. 6 is a view of another guide plate viewed from the tip side of the nozzle body.

[Explanation of symbols]

 10 Ultra High Pressure Water Nozzle Gun (Nozzle Gun) 12 Gun Body 18 Internal High Pressure Hose (Flexible Pipe Body) 26 Nozzle Main Body 32 Nozzle 36 Leaf Spring (Elastic Member) 56 Elastic Deformation Rod (Elastic Member) 66 Long Window (Guide Window) 68 Round window (guide window)

Claims (3)

[Claims] 1. A nozzle body (26) for supplying a liquid from a flexible conduit body (18) and ejecting the liquid from a nozzle (32) on the tip side, a gun body (12) via elastic members (36, 56). ) Is supported by the nozzle gun. 2. The nozzle gun according to claim 1, further comprising guide windows (66, 68) surrounding the nozzle body (26) in a radial direction. 3. The nozzle gun according to claim 1, wherein a spring constant of the elastic member (36) is adjustable.