Emptying and antifreezing valve for solar pipes

Abstract

The invention discloses an emptying and antifreezing valve for solar pipes, which is characterized by comprising a valve body, a sealed air-inlet pipe and an elastic sleeve, wherein the sealed air-inlet pipe is nested in the valve body and can slide upwards and downwards along the inner cavity of the valve body, and the elastic sleeve is sleeved on the sealed air-inlet pipe; a gap is arranged between the elastic sleeve and the sealed air-inlet pipe; the valve body is in a tubular structure which, from top to bottom, passes through a solar water tank; the lower part of the side wall of the valve body in the solar water tank is provided with water inlet / outlet holes, and the upper part of the side wall of the valve body is provided with a valve-body air hole; a sealing platform corresponding to the elastic sleeve is arranged on the inner wall of the valve body, and the position of the sealing platform is lower than that of the lowest water inlet / outlet hole; the sealed air-inlet pipe is in a hollow tubular structure; and a part (corresponding to the elastic sleeve) of the lower end of the sealed air-inlet pipe is provided with a boss. The valve disclosed by the invention integrates water supply and sewage functions and a pipe emptying function, and can effectively avoid the occurrence of a situation that water can not be used because the solar pipe is frozen and plugged due to temperature reduction, thereby really realizing the emptying and antifreezing performances of the solar pipe; and the valve is ingenious in structure and high in reliability.

Description

[0001] technical field [0002] The invention relates to a valve for evacuating and antifreezing solar pipelines. technical background [0003] At present, solar water heaters have been used more and more due to their remarkable energy-saving and environmental protection characteristics. However, in the process of use, especially when the temperature is low, the outdoor pipes often cause freezing and blockage of the outdoor water pipes when the temperature is low due to water, which not only causes waste of water resources, but also seriously affects the performance of solar water heaters. Normal use. In order to solve the above problems, there are mainly the following three methods: 1, adopting a pipeline heating belt; 2, adopting an electronic emptying valve; 3, adopting a superconducting heat pipe in the pipeline. But above-mentioned various methods have also produced a lot of problems in the use process, and electric heating cable is unsafe, easily causes fire and pers...

AI Technical Summary

Problems solved by technology

But above-mentioned various methods have also produced a lot of problems in the use process, and electric heating cable is unsafe, easily causes fire and personal electric shock accident, and its energy consumption height, life-span are short; The effect is not good, and it is difficult to promote the application due to installation restrictions

In the prior art, there is a patent number ZL01237499.7 for a gas introduction type evacuation valve, which needs to use three quick-opening valves to realize the evacuation of the pipeline. Although this evacuation method is reliable, the use process is very complicated and difficult to master , and the three quick-opening valves are vulnerable parts, which is not conducive to popularization

There is also a ceramic sealed emptying three-way valve with a patent number of ZL01261313.4. Although it can empty the solar energy upper and lower water pipes, because its water stop is outside the solar water tank, the water inlet and outlet pipes between the water tank shell and the inner tank There is still water between the three-way valve and the emptying three-way valve. When the temperature is below zero, the water in this section is easily frozen, causing the water in the water tank to not flow out, and it is difficult to completely empty and prevent freezing.

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