1. Traditional water-seale機那d floor drain
This kind of floor d校弟rain problem:
Advantages: cheap, widely us媽我ed in the products brought b中又y the builders of the rough house.
Disadvantages: poor self-cleaning abil河錯ity, easy to block, 短為difficult to clean; slow drainag做兵e

2. Eccentric block type lower flap floo們裡r drain
Use a gasket, fix it with a員北 pin on one side, add a lead block, a在舞nd use the principle of gravity eccentr笑通icity to seal. This structure很身 was initially horizontal, an裡雜d later evolved into vertical an但銀d vertical water seals來玩. When draining water, the gask土著et is opened under the action of wate熱化r pressure, and after the drainag美明e is finished, the ga技體sket is closed under the gravity o站拍f the lead block.
This kind of floor drain proble廠店m:
Advantages: cheap and easy to prod女農uce.
Disadvantages:

(1) The gasket is a mechanical stru知村cture and is not tightly se票讀aled;

3. Spring floor drain
Use a spring to stre月還tch the gasket at the lower e就樹nd of the sealing core to 雪問seal. When there is no or little w亮業ater in the floor drain, the gasket 國熱is stretched upward by the sprin件關g to close the pipe. Th長我e water in the floor drai睡空n reaches a certain height舊視. When the gravity of the water跳術 exceeds the elastic force of t紙技he spring, the spring我身 is pressed downward林鐵 by the water and th又家e gasket opens to autom外林atically drain.
This kind of floor drain problem:
Advantages: the deodora了中nt effect is not bad before the sprin嗎男g fails
Disadvantages:

(1) The spring is made of boron iro國要n, and it is easy to ru暗白st after long-term contact with sew弟錯age, resulting in weak們年ened elasticity, failure, and shor秒制t life;