Water jet peening device

Patent metadata

Field	Value
Publication number	US-9914186-B2
Application number	US-201414652531-A
Country	US
Kind code	B2
Filing date	Jan 9, 2014
Priority date	Jan 28, 2013
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

The water jet peening device of the present invention is provided with: a swiveling mechanism for swiveling a spray nozzle in the horizontal direction centered on a positioning member that is positioned at the upper end of an instrumentation tube support; a lift mechanism for raising and lowering the spray nozzle in the vertical direction with respect to the positioning member that is positioned at the upper end of the instrumentation tube support; and a rotation mechanism for supporting the spray nozzle so as to be able to rotate centered on a downward-inclined rotation shaft center on the positioning member end of the vertical direction, disposing a spray port aimed toward the side of the rotation shaft center in a direction that is at a slant from the rotation shaft center, and rotating the spray nozzle centered on the rotation shaft center.

First claim

The invention claimed is:

1. A water jet peening device, comprising:
a spray nozzle provided along with a positioning member positioned at an upper end of an instrumentation tube support, and includes a spray port to spray water jet;
a swiveling mechanism that swivels the spray nozzle around a central axis of the instrumentation tube support, said central axis passing through the center of the positioning member, said positioning member positioned at the upper end of the instrumentation tube support;
a lift mechanism that raises and lowers the spray nozzle in a vertical direction with respect to the positioning member positioned at the upper end of the instrumentation tube support;
a water supply tube including an end portion, where the end portion is bent toward the central axis at a first angle with respect to the central axis; and
a rotation mechanism that supports the spray nozzle, the spray nozzle configured to be rotated by the rotation mechanism while centered on a rotation shaft center located adjacent to the end portion,
wherein the rotation mechanism is disposed at the end portion, and
wherein the spray nozzle is disposed on the rotation mechanism and includes a spray port, and
wherein the spray port is offset from the rotation shaft center such that the spray port rotates eccentrically about the rotation shaft center, wherein the spray port is inclined toward the rotation shaft center at a second angle with respect to the rotation shaft center, and
wherein the rotation mechanism includes
a pinion gear provided concentrically on the rotation shaft center,
a rack gear that meshes with the pinion gear, and
a cylinder that is connected to the rack gear and actuates the rack gear.

2. The water jet peening device according to claim 1 , wherein the rotation mechanism includes:
a rotation shaft that supports the spray nozzle, the spray nozzle configured to rotate with respect to a base portion of the rotation shaft;
a water introduction path provided in the inner portion of the base portion;
a communication path that is provided in the inner portion of the rotation shaft, where the communication path causes the introduction path and the spray port to communicate with each other; and
a sealing material that seals a communication portion between the communication path and the introduction path, the sealing material allowing rotation of the rotation shaft.

3. The water jet peening device according to claim 1 , further comprising:
a stopper for restricting the rotation of the spray nozzle to a first and second position, wherein said first and second positions are 180 degrees apart.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Hinami Kazuyuki
• Kawanishi Kenichi

Classifications

• C21D7/04

  of the surface · CPC title

• C21D10/00

  Modifying the physical properties by methods other than heat treatment or deformation · CPC title

• G21C19/207

  Assembling, maintenance or repair of reactor components (G21C3/334 takes precedence) · CPC title

• B23P17/00 Primary

  Metal-working operations, not covered by a single other subclass or another group in this subclass · CPC title

• B24C1/10

  for compacting surfaces, e.g. shot-peening (for deforming sheet metal, tubes or profiles B21D31/06; as a metallurgical treatment C21D7/00, C22F1/00) · CPC title