Electro plating device

Patent metadata

Field	Value
Publication number	US-9790610-B2
Application number	US-201314403947-A
Country	US
Kind code	B2
Filing date	Jun 24, 2013
Priority date	Jul 2, 2012
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

An electro plating device includes a pipe inside seal mechanism which occludes an inner channel of a steel pipe, a tubular insoluble electrode which is disposed in a pipe end so as to be opposite to a female screw, a plating solution feed mechanism which includes a plurality of nozzles which extend radially with a pipe axis of the steel pipe as a center, and a pipe end seal mechanism which accommodates the nozzles thereinside and is mounted to the pipe end, when viewed in the pipe axial direction, a tip of each of the nozzles is positioned between the female screw and the insoluble electrode, and each of the nozzles injects the plating solution toward a direction which intersects an extension direction of the nozzle, the direction being a rotational direction of a clockwise direction or a counterclockwise direction in which the pipe axis is the center.

First claim

The invention claimed is:

1. An electro plating device which forms an electro plating layer on a surface of a female screw carved on an inner circumferential surface of a pipe end of a steel pipe, the electro plating device comprising:
a pipe inside seal mechanism which occludes an inner channel of the steel pipe at a position distanced from the female screw in a pipe axial direction of the steel pipe;
a tubular insoluble electrode which is disposed in the pipe end so as to be opposite to the female screw;
a plating solution feed mechanism which includes a plurality of nozzles which extend radially with a pipe axis of the steel pipe as a center, and is disposed outside the pipe end; and
a pipe end seal mechanism which accommodates the nozzles thereinside and is mounted to the pipe end in a state where the pipe end seal mechanism closely contacts an outer circumferential surface of the pipe end,
wherein when viewed in the pipe axial direction,
a tip of each of the nozzles is positioned between the female screw and the insoluble electrode, and
each of the nozzles injects the plating solution from an injection port formed on the tip toward a direction which intersects an extension direction of the nozzle, the direction being a rotational direction of a clockwise direction or a counterclockwise direction in which the pipe axis is the center, and

wherein the tip of each of the nozzles is positioned at an outer portion of the steel pipe from a tip of the female screw in the pipe axial direction of the steel pipe.

2. The electro plating device according to claim 1 ,
wherein each of the nozzles is perpendicular to the pipe axial direction or is inclined toward the pipe end side.

3. The electro plating device according to claim 2 ,
wherein the plating solution feed mechanism includes three nozzles.

4. The electro plating device according to claim 3 ,
wherein the pipe end seal mechanism further includes:
a discharging port for discharging a used plating solution; and
an atmosphere opening portion which is disposed at a position above the steel pipe in the pipe end seal mechanism and promotes discharging of the used plating solution.

5. The electro plating device according to claim 2 ,
wherein the pipe end seal mechanism further includes:
a discharging port for discharging a used plating solution; and
an atmosphere opening portion which is disposed at a position above the steel pipe in the pipe end seal mechanism and promotes discharging of the used plating solution.

6. The electro plating device according to claim 1 ,
wherein each of the nozzles is perpendicular to the pipe axial direction, and each of the nozzles injects the plating solution in a reference direction perpendicular to the pipe axial direction and the extension direction when viewed in the extension direction of the nozzle or injects the plating solution in a direction which is inclined from the reference direction to the pipe end side.

7. The electro plating device according to claim 6 ,
wherein the plating solution feed mechanism includes three nozzles.

8. The electro plating device according to claim 7 ,
wherein the pipe end seal mechanism further includes:
a discharging port for discharging a used plating solution; and
an atmosphere opening portion which is disposed at a position above the steel pipe in the pipe end seal mechanism and promotes discharging of the used plating solution.

9. The electro plating device according to claim 6 ,
wherein the pipe end seal mechanism further includes:
a discharging port for discharging a used plating solution; and
an atmosphere opening portion which is disposed at a position above the steel pipe in the pipe end seal mechanism and promotes discharging of the used plating solution.

10. The electro plating device according to claim 1 ,
wherein the plating solution feed mechanism includes three nozzles.

11. The electro plating device according to claim 10 ,
wherein the pipe end seal mechanism further includes:
a discharging port for discharging a used plating solution; and
an atmosphere opening portion which is disposed at a position above the steel pipe in the pipe end seal mechanism and promotes discharging of the used plating solution.

12. The electro plating device according to claim 1 ,
wherein the pipe end seal mechanism further includes:
a discharging port for discharging a used plating solution; and
an atmosphere opening portion which is disposed at a position above the steel pipe in the pipe end seal mechanism and promotes discharging of the used plating solution.

Assignees

• Nippon Steel & Sumitomo Metal Corp
• Vallourec Oil & Gas France

Inventors

• Kimoto Masanari
• Ishii Kazuya
• Yamamoto Tatsuya

Classifications

• C25D5/022

  using masking means · CPC title

• C25D5/08

  Electroplating with moving electrolyte e.g. jet electroplating {(using locally applied jets of electrolyte C25D5/026)} · CPC title

• C25D5/02

  Electroplating of selected surface areas · CPC title

• C25D7/04 Primary

  Tubes; Rings; Hollow bodies · CPC title

• C25D17/12

  Shape or form (C25D17/14 takes precedence) · CPC title