Safe antifreeze ball valve

Abstract

The invention discloses a safe antifreeze ball valve which comprises a valve body, a seal ball arranged in a seal ball installation room of the valve body, a valve rod and a handle, wherein a channel is arranged in the seal ball, the inner end of the valve rod is connected with the seal ball, the outer end of the valve rod extends out of the valve body to be connected with the handle, the two ends of the valve body are respectively provided with a water inlet and a water outlet, the side wall of the valve body is provided with a drainage hole communicated with the seal ball installation room, a weep hole communicated with the channel is arranged on the seal ball wall body, and the water outlet, the weep hole, the channel, the seal ball installation room and the drainage hole are sequentially communicated when the valve body is in the closed state. When the automatic drainage antifreeze ball valve is in the closed state, ponding water in equipment connected with the water outlet is discharged through a channel formed by the weep hole and the drainage hole of the seal ball to achieve the purpose of automatically discharging extra ponding water in the valve body, pipelines connected with the water outlet of the valve body, thus playing the role of protecting the equipment when the temperature changes.

Description

technical field [0001] The invention relates to a valve, in particular to a safety antifreeze ball valve. Background technique [0002] As the use of natural gas, artificial gas and liquefied petroleum gas becomes more and more common, the use of domestic gas water heaters is also increasing rapidly. For safety reasons, gas water heaters are generally installed in a well-ventilated place outside the bathroom. In winter in the north, because the temperature is low, water will be stored in the interior and pipes of the water heater after use, and the phenomenon of freezing and cracking of the gas water heater and pipes often occurs. In order to reduce the loss caused by low temperature, it is necessary to ensure that the water remaining in the water heater is removed in time after the equipment is used. Such as the Chinese invention patent of patent No. 200720023750.6 discloses a kind of solar hot water pipeline antifreeze valve, and this valve is a two-position three-way ele...

AI Technical Summary

Problems solved by technology

Due to the use of two-position three-way electromagnetic ball valves and the need for three states, the structure is more complicated and the control is cumbersome.

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