JP2798880B2 - Rotating gun for ultra high pressure water - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrahigh-pressure water gun for processing the surface of a workpiece with ultrahigh-pressure water, and particularly to an ultrahigh-pressure water suitable for separating a surface material from the surface of the workpiece. Related to a rotating gun.

[0002]

2. Description of the Related Art In order to remove a surface layer such as a coating film and rust formed on the surface of an article, a method using a grinding wheel or the like, sand,
The removal has been performed by a method of injecting the abrasive particles at a high pressure or a method of dissolving the surface layer with various chemical substances. The method of using a grinding wheel or spraying sand or grinding particles has problems such as noise, generation of dust, and treatment of a large amount of solid waste such as used sand and grinding particles. In addition, the method using chemicals has a problem of waste liquid treatment and a problem of working environment.

[0003] Therefore, it has been proposed to remove the surface layer by spraying ultra-high pressure water from a nozzle of a gun. The method of removing the surface layer with ultra-high pressure water is only necessary to separate the substance separated from the surface layer from water, it is easy to treat waste, and there is no need to use special substances, so the working environment is also It has the characteristic of being good. In particular, in recent years, various types of synthetic resins have been reused, but in the case of synthetic resin products such as painted automobile parts such as plastic bumpers, the paint is not completely removed from the synthetic resin. In addition, the reusable uses of the synthetic resin are limited, and it is difficult to reuse the synthetic resin as an automobile part. Therefore, in order to promote recycling, a method of completely removing paint is required. However, a method using chemicals such as organic solvents or solid particles such as sand and grinding particles requires a work environment and waste treatment. For this reason, peeling of paint by ultra-high-pressure water has attracted attention.

It has been proposed that a gun for ultrahigh-pressure water used for such a purpose be provided with a plurality of nozzles at the tip of the gun and rotate the gun or the nozzle to increase the processing area with one nozzle. For example, see
207153, JP-A-2-198799, JP-A-2-271199, and JP-A-3-94849. All of these guns for ultrahigh-pressure water have a gun or nozzle which is driven by a belt or a motor. It is driven and rotated.

[0005]

A gun having a mechanism for rotating a nozzle or a tip portion like a conventional gun for ultra-high-pressure water drives the nozzle or the tip portion by a belt or a motor. Therefore, it is necessary to separately provide a drive device such as an electric or pneumatic drive motor, and the gun requires a pipe for supplying ultra-high pressure water and a pipe or electric wiring to drive these, which complicates the structure of the gun. In addition, there is a problem that the size becomes large.

[0006]

According to the present invention, there is provided a rotary gun for ultra-high pressure water having a rotary nozzle head at a tip thereof, wherein an impeller mounted on a shaft of the rotary head is provided in a flow path of the ultra-high pressure water. And a rotating gun for ultra high pressure water in which a rotary nozzle head is rotated by an impeller rotated by ultra high pressure water.

That is, the gun for ultra-high pressure water of the present invention comprises:
An impeller is provided in the ultrahigh-pressure water flow path formed inside the gun, so the ultrahigh-pressure water flowing to the nozzle rotates the impeller, and the rotation of the impeller causes a rotating nozzle head attached to the tip of the gun. Is a rotating gun for ultra-high pressure water that rotates.

[0008]

The impeller connected to the rotating shaft of the rotating head is provided in the flow path of the ultrahigh-pressure water, and the rotating head is rotated by the rotation of the impeller by the flow rate of the ultrahigh-pressure water, so that the ultrahigh-pressure water jetted from the head is supplied. By simply rotating the rotary head, the rotary head can be rotated, and a small and easy-to-handle rotary head can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a view showing a cross section of an embodiment of the gun for ultrahigh-pressure water of the present invention. A rotating head 2 is attached to the gun body 1 for ultrahigh-pressure water, and a nozzle 3 is provided at a position displaced from the center of rotation of the rotating head. An ultrahigh-pressure water passage 5 is formed inside a rotating shaft 4 of the rotating head, and an impeller 6 is attached to the rotating shaft. Ultrahigh-pressure water is supplied to the gun from the ultrahigh-pressure water introduction unit 7 to rotate the impeller, and then jetted from a nozzle provided in the rotary head through a passage inside the rotary shaft.
The rotating shaft and the gun body prevent leakage of ultra-high pressure water in the seal portion 8.

The gun body for ultra-high pressure water can be made of a highly corrosion-resistant metal such as stainless steel, and the rotating shaft rotating at high speed has abrasion resistance, corrosion resistance, seizure resistance, and high temperature oxidation resistance. It is preferable to use alloy steel having high properties and the like.

[0011] Stainless steel (S
US403), and the high-speed rotating part of the rotating shaft is introduced into the impeller of a gun using an alloy steel (KH-C50 manufactured by Toyo Kohan) having excellent seizure resistance and abrasion resistance.
２０００, 2000kgf / at a discharge path angle of 30 ° from the impeller
Ultra high pressure water at a pressure of cm ² was supplied at a flow rate of 5 L / min, and the impeller was rotated at a rotation speed of 2500 RPM. The rotation of the impeller consumed about 5% of the supplied energy. In order to prevent the leakage of the ultra-high pressure water from the rotating shaft, various sealing methods (Omni-seal manufactured by Huron) or the like having excellent sealing characteristics at the ultra-high pressure can be used.

FIG. 2 is a view for explaining an embodiment of the impeller. The impeller 6 is made of stainless steel (SUS403).
And has 12 blades. FIG. 2 (A)
It is a figure explaining attachment of a wing, the number of wings is omitted and illustrated, and the wing has an angle of 50 degrees, but the installation angle of the wing is not limited to 50 ° but may be any angle. be able to. FIG. 2B is a plan view of the impeller.

FIG. 3 is a diagram showing a surface of the rotary head on which a nozzle is provided at the tip end. By providing the rotary head 2 with a plurality of nozzles 3, the working surface of the ultra-high pressure water by one rotary head can be increased.

[0014]

According to the rotary gun for ultra high pressure water of the present invention, an impeller connected to the rotating shaft of the rotary head is provided in the flow path of the ultra high pressure water, and the rotary head is rotated by the flow rate of the ultra high pressure water. The structure of the rotating gun for ultrahigh-pressure water is simplified, and a power supply for driving other than ultrahigh-pressure water is not required, so that a compact and easy-to-handle device can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of an ultrahigh-pressure water gun according to the present invention.

FIG. 2 is a diagram illustrating one embodiment of an impeller.

FIG. 3 is a diagram illustrating a surface provided with a nozzle at the tip of a rotary head.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Gun main body, 2 ... Rotating head, 3 ... Nozzle, 4 ... Rotating shaft, 5 ... Ultra high pressure water passage, 6 ... Impeller, 7 ... Ultra high pressure water introduction part, 8 ... Seal part

Claims (1)

(57) [Claims] 1. A rotating gun for ultra-high pressure water having a rotating nozzle head, wherein an impeller having a plurality of blades rotating in an annular space formed around the rotating head axis as a central axis is attached to the rotating head axis. An ultra-high-pressure water flow path is connected to the annular space. The ultra-high-pressure water in which the rotating nozzle head is rotated by the impeller rotated by the supplied ultra-high-pressure water and the impeller is rotated A rotating gun for ultra-high pressure water, characterized by injecting water from a nozzle.