Flapper double row drain valve

Abstract

The invention discloses a flapper double row drain valve which comprises two chains, a flapper, a half-row pull rod, a water flushing control structure and a pneumatic control adjusting device. The upper ends of the two chains are connected with the water flushing control structure respectively, the lower ends of the two chains are connected with the flapper and the half-row pull rod respectively, the upper end of the pneumatic control adjusting device is sealed and covered with the flapper, a guide tube is formed at the circle center position of the flapper, a half-row water inlet is arranged at the periphery of the circle center of the flapper, a sealing fin is arranged on the half-row pull rod in a sleeved mode, the half-row pull rod penetrates the guide tube and is located above the flapper, an air outlet hole is formed in the pneumatic control adjusting device, and a whole-row water inlet is formed in the lower end of the pneumatic control adjusting device. The flapper double row drain valve is simple in structure and low in the production cost, and fewer parts are adopted; meanwhile, by means of the flapper double row drain valve, heights of whole-row and half-row remaining water levels of the drain valve can be adjusted conveniently on the flapper, the requirement for quantitative drainage is met, the flapper can meet the using requirement for different water discharge amounts of most water tanks in the current market, the installing requirement of the drain valve is lowered, and applicability is wider.

Description

technical field [0001] The invention relates to a drain valve, in particular to a double-row drain valve with flap cover. Background technique [0002] The drain valve is a common part of the toilet to control the drainage of the tank. In order to save drainage, people have developed double row drain valves. Among them, the air-operated double-row drain valve, as one of the double-row drain valves, has been widely used. The air-controlled double-row drainage valve is installed on the double-drainage valve body with an air-controlled adjustment device, and the function of controlling the full and half drainage of the valve body through the different working states of the air-controlled adjustment device. [0003] In the prior art, the flap cover of the air-operated double-row drain valve is a completely closed or semi-closed structure. The semi-closed flap usually has one or two air holes. Through the control of the air holes, it can be controlled. The whole or part of the...

AI Technical Summary

Problems solved by technology

[0006] Although the barrel-type double-row drain valve has high precision in quantitative drainage, the water level can change by about 3-5mm every time it is adjusted, but there is probably an unadjustable blind area between the upper limit water level of the full row and the lower limit water level of the half row, and the whole process cannot be realized. Adjustable, and in order to meet the quantitative drainage requirements for water tanks of different heights, it is necessary to select drain valves of different heights to match them, which requires high installation requirements and poor applicability

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