A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The present invention relates to a manhole cover. More particularly, the present invention relates to a manhole cover formed in a round or square shape, light in weight, excellent in heat resistance and impact resistance, providing an air purification effect, and easy to construct. According to the present invention, the manhole cover comprises: a first raw material layer formed under the manhole cover; a first fiber layer formed on the first raw material layer; a second raw material layer formed on the first fiber layer; a perforated iron piece having a plurality of perforations formed thereon to form an upper portion of the second raw material layer; a third raw material layer formed on an upper portion of the perforated iron piece that are crossed orthogonally formed; and a second fiber layer formed over the third raw material layer.
본 발명은 맨홀뚜껑에 관한 것으로, 원형 또는 사각으로 형성되어 중량이 가볍고 내열성 및 내충격성이 우수하며, 공기정화효과를 제공하고 시공이 용이하도록 형성되는 맨홀뚜껑을 포함한다.
The present invention relates to a manhole cover. More particularly, the present invention relates to a manhole cover formed in a round or square shape, light in weight, excellent in heat resistance and impact resistance, providing an air purification effect, and easy to construct. According to the present invention, the manhole cover comprises: a first raw material layer formed under the manhole cover; a first fiber layer formed on the first raw material layer; a second raw material layer formed on the first fiber layer; a perforated iron piece having a plurality of perforations formed thereon to form an upper portion of the second raw material layer; a third raw material layer formed on an upper portion of the perforated iron piece that are crossed orthogonally formed; and a second fiber layer formed over the third raw material layer.
본 발명은 맨홀뚜껑에 관한 것으로, 원형 또는 사각으로 형성되어 중량이 가볍고 내열성 및 내충격성이 우수하며, 공기정화효과를 제공하고 시공이 용이하도록 형성되는 맨홀뚜껑을 포함한다.
Manhole cover
맨홀뚜껑
JANG JUNG SIK (author)
2021-07-16
Patent
Electronic Resource
Korean
IPC:
E02D
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