Composite floating ball

Abstract

The invention relates to a composite floating ball. The floating ball comprises an inner ball and an outer ball, wherein the outer ball is coated outside the inner wall and is made of an organic material; and the inner ball is a hollow ball and is made of a nonmetal or metal material. The floating ball is formed by coating the inner wall through injection molding, mold pressing and extrusion, and the inner ball comprises one layer or multiple layers. The inner wall is a hollow ball made of a high-temperature and high-pressure resisting high-density nonmetal or metal material, so that condensation caused by temperature change is not easy to occur in the inner wall under the environment with high temperature and great temperature change. In order to meet the designed technological requirements of the outer ball, the outer ball is made of an organic material through the technologies of injection molding, mold pressing, extrusion and the like. The defects of various traditional floating balls are overcome. The composite floating ball has the advantages of reasonable, safe and reliable technologies, wide application range and long service life, and is especially applicable to important parts of an automatic water stopping device for the breakage of all-glass evacuated solar collector tubes.

Description

technical field [0001] The invention relates to a pipeline element, in particular to a composite floating ball. Background technique [0002] Now the country is actively promoting green energy. For example, the main component of household solar water heaters is the all-glass vacuum solar collector tube. As one of the important components, the floating ball plays a very important role in the long-term normal work of the solar collector tube in an environment with high temperature or large temperature difference. great effect. [0003] At present, there are the following types of floating balls generally used in the market, such as metal hollow balls, plastic hollow balls, glass hollow balls, etc., all of which are made of a single material. The above-mentioned floating ball will have the following problems in actual use; [0004] For example, in the environment of high temperature or large temperature difference, condensation is easy to occur in the floating ball. During lo...

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Problems solved by technology

[0004] For example, condensation is easy to occur in the floating ball in an environment with high temperature or large temperature difference. During long-term use, condensed water will be generated in the ball due to condensation, resulting in insufficient buoyancy of the ball, which cannot be used for a long time, and the short life directly affects the design requirements.

[0005] Due to the different materials, in order to meet the design requirements, the process of processing hollow balls is complicated and cumbersome, and the manufacturing cost is high, so it can only be produced in small batches and cannot be widely used.

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