| 摘要 |
PROBLEM TO BE SOLVED: To improve the durability and reliability of an entire bent pipe without using a sleeve by an anti-wear material and the sleeve applied the anti-wear treatment on its surface. SOLUTION: An anti-wear sleeve 2 consisting of a cylindrical member 2b bent smoothly corresponding to the inner surface of a bent pipe 1 and a partition plate 2a provided on its center is inserted inside a bent pipe 1. Meantime, since the partition plate 2a is arranged so that the inside of the bent pipe 1 is divided by two of the inner periphery side and outer periphery side against the curve of the bent pipe, when a powder is streamed in the arrow mark direction of a figure, the powder is divided by two of the inner periphery side and outer periphery side by the partition plate 2a and nearly equal amount is streamed respectively. Therefore, the powder amount collided with the portion easy to wear of the usual bent pipe is reduced by half and the durability and reliability of the entire bent pipe are improved.
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