Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Journal of Achievements in Materials and Manufacturing Engineering

1 2006

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Development of a height-adjustable manhole

Kim Ch. H., Park J. H.

Journal of Achievements in Materials and Manufacturing Engineering

2006

Vol. 14, nr 1-2

21--25

Purpose: It is found that to determine optimal dimension of gear-shaped parts through bending stress formulas and Taguchi orthogonal array table. Design/methodology/approach: Whole parts of real manhole were manufactured experimentally by casting nodular graphite cast iron according to the Korean Standard. It can be used as water supply and drainage, sewage, telecommunication cable, traffic sign, electricity supply, etc. with better performance. Findings: This manhole consists of cover, outer cylinder and inner cylinder. The gear-shaped stairs are extruded on the outer wall of inner cylinder, and on the inner wall of outer cylinder. The outer cylinder has three columns of 4~5 receptacles, and the inner cylinder has three columns of 6~7 protrusions. The inner cylinder shall be slided into the outer cylinder and then be rotated within the outer cylinder in order to lock the protrusions into the receptacles. The stairs on outer cylinder and inner cylinder allow workers to control the height of manhole because the height is controlled by adequate locking them on sidewall in installation or rehabilitation of manholes. It is designed for the perfect lock. Practical implications: Use of this manhole must be drastically economical because it requires only 1-2 workers and simple adjustment of the height comparing with that the existing manholes is required 4-5 workers and reconstruction because conventional should be entirely excavated to reinstall or repair. This entire excavation of a manhole causes too much time-consuming work, waste of resources, and obstruction of traffic. Originality/value: This paper describes an optimal design of manhole, which deals with design elements of manhole which has gear-shaped stairs on the road to adjust its height.