Sealed liquid blowdown system

[0019] Analysis of pipe diameter and aperture size of RV sewage pipe 1, socket 23, anti-drop ring 22, funnel mouth 32, etc.

[0020] According to the international general standard, the diameter of RV sewage pipe 1 is generally 3 inches (about φ76mm), and a small number of large RVs use 4-inch (about φ102mm) thickened sewage pipes.

[0021] The sewage well 4 at the end of the site has a round well or a square well. According to the national standard, the diameter or side length of the sewage well 4 is 200, 300, 450, 500mm, etc., so the sewage outlet 3 should also be made in various models according to the national standard to match Sewage well 4 used.

[0022] The conical bowl 31 in the design sewage outlet 3 has a downward included angle with the horizontal plane. In theory, the angle is between 0° and 90°. After many tests, when the included angle is less than 10°, the water-filled Due to the small centripetal slope, the ring-shaped water bag 2 is not strong enough to wrap the

[0028] Sewage outlet 3 is used alone, and is suitable for temporary parking of RVs for sewage discharge.

[0029] During use, take off the sewage well cover 41, the caravan sewage pipe 1 is inserted under the funnel mouth 32 of the sewage outlet 3, open the room and open the sewage valve, and carry out the sewage operation. After the blowdown is finished, the caravan sewage pipe 1 is taken back to the fixed part of the caravan, and the sewage well cover 41 is covered at the same time.

[0031] The sewage outlet 3 and the ring-shaped water bag 2 are used together, which is more environmentally friendly and safe, and is suitable for camping or long-term parking of the RV.

[0032] When in use, remove the sewage well cover 41, put the annular water bag 2 on the sewage outlet 3, with the water injection port 21 of the annular water bag 2 facing upwards, and then insert the RV sewage pipe 1 into the sewage through the socket 23 and the funnel mouth 32 Inside well 4. After that, water is poured into the annular water bag 2 from the water injection port 21 . When the ring-shaped water bag 2 was filled with water, because of the inward slope of the cone bowl 31 and the water injection expansion of the ring-shaped water bag 2, the ring-shaped water bag 2 tightly wrapped the sewage pipe of the caravan, and prevented the foul smell from overflowing in the sewage well 4 simultaneously. At this time, open the room and open the sewage valve to carry out the sewage discharge