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Title:
DESCALING AND LUBRICANT APPLYING DEVICE FOR INSIDE SURFACE OF SEAMLESS STEEL TUBE
Document Type and Number:
Japanese Patent JPH07155805
Kind Code:
A
Abstract:

PURPOSE: To apply a lubricant without being affected by ejector effect caused by jetting high pressure water by mounting a lubricant jetting nozzle provided with guide nozzles which are isolated from a high pressure water jetting nozzle and simultaneously jetting the high pressure water and lubricant.

CONSTITUTION: The high pressure water jetting nozzle 3 with which high pressure water is jetted in the direction A as represented by an arrow on the inner peripheral surface of the seamless steel tube 1, i.e., toward the control part of the tube at a prescribed angle is provided. And, the lubricant jetting nozzle 4 provided with the guide nozzles through which a powdery lubricant is jetted in the direction B as represented by an arrow on the inside peripheral surface i.e., toward a tube end is mounted at the tip of a lubricant supply pipe 5 which is connnected to the tip of an internal pipe 2a of a lance 2. Then, when the inside diameter of the steel tube 1 is taken as ID, length of the lubricant supply pipe 5 as L, length of the extent of the guide nozzles 7 as S and spreading angle as 2θ, they are made so as to satisfy the relationships of L/ID≥3.0, S/ID≥0.25, 60≤2θ≤120°. In this way, the inside surface of tube is descaled by jetting high pressure water and simultaneously the lubricant is efficiently applied onto the taneously the lubricant is efficiently applied onto the inside surface of tube by jetting the lubricant.


Inventors:
Matsutani, Atsushi
Oka, Hiroshi
Application Number:
JP1993000300380
Publication Date:
June 20, 1995
Filing Date:
November 30, 1993
Export Citation:
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Assignee:
KAWASAKI STEEL CORP
International Classes:
B21B19/04; B21B19/10; B21B45/02; B21B45/08; (IPC1-7): B21B19/04; B21B19/10; B21B45/02; B21B45/08