Sealing rings, protective sleeves and header

Abstract

The invention relates to sealing rings, protective sleeves and a header, and belongs to the field of solar heat utilization. The sealing rings are located at inner container holes of the header so asto play the sealing effect between vacuum pipes and the inner container holes, the sealing rings are connected with sleeves, the sleeves are provided with upper openings and lower openings, the upperopenings and connected heat conductors mutually correspond to each other in size and shape of the connection position, the lower openings communicate with inner holes of the sealing rings, the outer diameter of the sleeves are not larger than the center distance between two adjacent inner container holes, and the sleeves are provided with protective cavities which can contain the opening ends of the vacuum pipes connected with the sealing rings. The protective sleeves are formed by connecting the heat conductors and the sleeves, the header is characterized in that the sealing rings of the protective sleeves are arranged at the inner container holes, the sleeves and the heat conductors are arranged in a cavity of an inner container of the header, water in the header and the opening ends ofthe vacuum pipes can be effectively isolated by the protective sleeves, so that the phenomenon that the overheated vacuum pipes are in direct contact with cold water in the header and therefore are burst and damaged is avoided, and the heat collection vacuum pipes are effectively protected.

Description

technical field [0001] The application belongs to the field of solar heat utilization, and relates to a sealing ring, a protective cover and a heat collection box used between the inner hole of a solar heat collection box and a heat collection vacuum tube. Background technique [0002] The vacuum tube type solar stand-alone heat collector or engineering heat collector with water as the heat transfer medium is placed in the inner tank of the heat collection box through the open end of the vacuum tube through the through hole of the sealing ring. When the vacuum tube is overheated at high temperature, it enters the heat collection box The temperature difference between the cold water and the vacuum tube is large. Once in contact with cold water, the temperature of the vacuum tube wall will drop sharply. Due to the low thermal conductivity of glass, the vacuum tube wall will experience inconsistent cooling and different expansion deformations, resulting in uneven stress on the v...

AI Technical Summary

Problems solved by technology

[0002] The vacuum tube type solar stand-alone heat collector or engineering heat collector with water as the heat transfer medium is placed in the inner tank of the heat collection box through the open end of the vacuum tube through the through hole of the sealing ring. When the vacuum tube is overheated at high temperature, it enters the heat collection box The temperature difference between the cold water and the vacuum tube is large. Once in contact with cold water, the temperature of the vacuum tube wall will drop sharply. Due to the low thermal conductivity of glass, the vacuum tube wall will experience inconsistent cooling and different expansion deformations, resulting in uneven stress on the vacuum tube wall. Damage, especially the open end of the thicker vacuum tube is the most vulnerable. As a solar collector, damage to one vacuum tube will cause the entire solar collector to leak and fail to operate

In some cases, even if hot water is urgently needed and the solar collector has no hot water, cold water cannot be replenished immediately to prevent the vacuum tube from bursting and damaged. Water can only be replenished after the temperature of the vacuum tube drops to an appropriate temperature, which greatly reduces Utilization of solar collectors

Therefore, the sealing ring used in the existing solar collector box cannot effectively protect the vacuum tube

[0003] The patent application with the application number 00101465.X also discloses a connection sleeve, which is "through the connection sleeve, the lower inner hole is sealed with the mouth of the all-glass vacuum heat collecting tube, and the upper inner hole is connected to the lower port of the long metal tube. It is used to form a new generation of vacuum heat collecting tubes, and is connected to the inner tank of the solar water tank or the hole of the inner tank of the collector tube through the outer wall of the upper part of the connecting sleeve. The axial dimension of the product made according to this application is relatively large. It is not convenient for the processing and manufacturing of the heat collection box, the product cost is high, the installation is inconvenient, and the practicability is poor; when it is used for a long time, the sealing of the connecting sleeve is unreliable, and it is easy to seep water, and it is not suitable for solar energy project heat collection with inner tank holes on both sides box

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