Drain trap with backward flowing prevention function and difficult drying effect of water seal

Abstract

The invention discloses a drain trap with a backward flowing prevention function and a difficult drying effect of a water seal. The drain trap comprises a drain trap casing and a water seal structure, wherein the water seal structure comprises a water seal outer sleeve, a water seal inner sleeve, an upper floating cover and a lower floating cover; the bottom end of the water seal inner sleeve is suspended above the bottom cover; the water seal outer sleeve is arranged on the bottom cover; the water seal inner sleeve is inserted into an inner cavity of the water seal outer sleeve; a vertical water passage, and an upper end opening and a lower end opening of the vertical water passage are formed between the water seal inner sleeve and the water seal outer sleeve; the upper floating cover and the lower floating cover are in an annular sheet shape, are arranged on the water seal inner sleeve in a sleeving way and can ascend and descend along the water seal inner sleeve; the upper floating cover movably covers the top end of the water seal outer sleeve and unidirectionally seals the upper end opening of the water passage; a supporting structure is arranged in a corresponding position of the lower end opening of the vertical water passage and between the water seal outer sleeve and the water seal inner sleeve; the lower floating cover is lapped and covers the supporting structure to unidirectionally seal the lower end opening of the vertical water passage; a sealed vertical water seal is formed between the water seal outer sleeve, the water seal inner sleeve, the upper floating cover and the lower floating cover; the effects of preventing odor, preventing cockroaches, preventing backward flowing and preventing drying are achieved.

Description

technical field [0001] The invention relates to a water trap, in particular to a water trap which can prevent backflow and has a water seal that is not easy to dry up. Background technique [0002] The water trap is a common drainage component used in the drainage system in the construction field. The existing water trap is used for deodorization and anti-exhaust gas in the drainage system of the water appliance. The earliest structure is the water trap of the S-shaped water container. The pipe forms a water-sealed structure, which is used to isolate the waste gas and odor in the drainage pipe from entering the room through the drainage pipe, and also prevents cockroaches from entering the room through the drainage pipe. [0003] Existing traps have structures such as S-type, P-type, sedimentary type, etc., to be suitable for different spaces (see Figure 6 ), however, these traps all have the following defects: [0004] ⑴No anti-drying effect: The water seal is an open str...

AI Technical Summary

Problems solved by technology

[0004] ⑴No anti-drying effect: The water seal is an open structure. If the water appliances on the water trap are out of use for a period of time, the water trap will lose its water seal due to the reduction of water volatilization or even drying up, resulting in the inability to block, deodorize and prevent insects role (see Figure 7 );

[0005] (2) The water trap is easy to deposit dirt, which affects the drainage effect: the water storage structure of the water trap itself is easy to deposit dirt, and the kitchen waste in China is oily and easy to adhere to the pipe wall, and the thicker it is, the more viscous it is. It is also easy to adhere to debris, making the pipe shrink and smaller, which affects the drainage effect and becomes clogged. Therefore, the existing traps usually need to find professional workers to dredge and maintain them regularly;

[0006] ⑶ Does not have anti-return water performance: the existing trap structure does not have a one-way valve structure to prevent backwater and backflow. There will be the phenomenon of water backflow

[0009] ①Easy to block and slow water launch: easy to be leaked into the space under the float by mud and sand, difficult to discharge and silt in it, resulting in the reduction of the floating stroke of the float or even 0 over time

[0010] Since most houses will be decorated first and then put into use, it is unavoidable that a large amount of sediment will be discharged into the sewer through the water trap when cleaning the decoration site, which makes the above two patented water trap technologies unavoidable in the decoration. After finishing, the stroke of the float of the trap is significantly reduced, which makes it difficult for the trap to let larger food residues pass through, and it is easy to be blocked, and the water launching speed is always very slow

[0011] ② It is difficult for the float to keep floating up and down smoothly for a long time: because the float needs to be adapted to the cylindrical wall of the bottom cover in order to float up and down smoothly and to seal the lower port of the vertical waterway, the gap between the outer contour of the float and the cylindrical wall of the bottom cover is small. For example, when it is used in a kitchen basin, a large amount of oil stains are easily adsorbed on the surface of the parts of the trap, and the oil stains attached to the surface of the parts will become more and more viscous with time, which will affect the smooth floating of the float. If the weather is dry or If the water basin is stopped for a period of time, the float will also be solidified in the bottom cover due to the solidification of oil on the surface, which will cause the float to fail

[0012] ③ Closed water seal is prone to failure: the above two problems will cause the float to lose its effectiveness, and once the float fails, the lower seal of the closed water seal cannot be closed with the float, resulting in the inability to form a closed water seal and lose the long-term Maintain the effectiveness of the water seal

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