A backwater self-closing valve

Abstract

The invention discloses a water-returning self-switched-off valve and belongs to the field of drainage devices. The water-returning self-switched-off valve is characterized in that a water wheel witha water wheel shaft is arranged in a water outlet through hole; a first transmission gear is rotatably connected with a third transmission gear through a shaft and a valve body; a driving gear is externally engaged with the first transmission gear; the portion, located over the middle position of the first transmission gear and the third transmission gear, of the valve body is provided with a slide way which is internally provided with a sliding plate; the lower end of the sliding plate is fixedly connected with a fixing shaft; the fixing shaft is rotatably connected with a second transmissiongear; the sliding plate is connected with a wall at the upper end of the slide way through a first compression spring; the outer wall of the valve body is hinged to a turning point of an L-shaped plate; one end of the L-shaped plate is provided with a long-strip-shaped guiding through hole, and the fixing shaft is put in the guiding through hole; a water inlet through hole is provided with a spherical cavity, wherein the spherical cavity communicates with the water inlet through hole and is provided with a spherical valve element; and a rotating rod penetrates a through hole in the upper endof the spherical cavity of the valve body and is fixedly connected with a gear hole in a driven gear. Compared with the prior art, the water-returning self-switched-off valve has the advantages that the labor is saved, and the sealing effect is good.

Description

technical field [0001] The invention relates to a valve, in particular to a solar water supply valve suitable for automatic closing. Background technique [0002] At present, solar water heaters have been widely used in people's daily life. During the water supply process of the solar water heater, after the water in the solar water heater is full, the excess water will be discharged through the overflow port of the solar water heater, prompting to close the valve of the water supply pipe. However, if you forget to close the valve of the upper water pipe, the water flow will continue to flow out from the overflow of the solar water heater, thereby causing waste. [0003] Most of the existing self-closing valves use electromagnetic induction valves or float valves. Electromagnetic induction valves need to provide power, and cannot work when the power is cut off or the battery is exhausted. And ball float valve is not only difficult to install, and in use, easily airtight la...

AI Technical Summary

Problems solved by technology

However, if you forget to close the valve of the upper water pipe, the water will continue to flow out from the overflow of the solar water heater, causing waste

[0003] However, most of the existing self-closing valves use electromagnetic induction valves or float valves. Electromagnetic induction valves need to provide power, and cannot work when the power is cut off or the battery is exhausted.

The float valve is not only difficult to install, but also easy to be leaky during use, resulting in water leakage, and after damage, because the float valve is in the barrel of the solar water heater, it is not easy to replace

In some existing valves with water wheels, the water wheel directly drives the valve core to move through the force of the water flow. Due to the lack of labor-saving devices, when the force of the water flow is small, it is difficult to achieve the effect of closing the valve.

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