Solar vacuum heat collecting pipe with double expansion joints
A technology of vacuum heat collecting tubes and expansion joints, which is applied in the field of heat collecting tubes of trough solar heat collectors and trough solar concentrators, can solve the problems of large heat absorbing parts, affecting life, and not easy to fix Reduce heat dissipation, improve utilization efficiency, and facilitate installation and fixation
Active Publication Date: 2017-02-22
SOUTHEAST UNIV
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The invention discloses a solar vacuum heat collecting pipe with double expansion joints. The solar vacuum heat collecting pipe comprises the inner expansion joint, the outer expansion joint, a kovar alloy pipe, a glass pipe, a heat absorbing pipe, a supporting casing pipe, a flange and a degasser. The glass pipe and the kovar alloy pipe are connected in a fusion seal manner. The kovar alloy pipe and the outer expansion joint are connected through welding. The outer expansion joint and the flange are connected through welding. The flange and the inner expansion joint are connected through welding. The inner expansion joint and the supporting casing pipe are connected through welding. The supporting casing pipe and the heat absorbing pipe are connected through welding. The inner expansion joint and the outer expansion joint are both multi-layer type expansion joints. A fixing bolt hole and a sealing groove are formed in the flange. A vacuum heat collecting pipe body and a tracking device are fixed through the flange. The degasser is located in the kovar alloy pipe located at the end portion. The heat collecting pipe is reasonable in design, capable of improving the heat collecting efficiency, convenient to fix, firm, durable and capable of more safely running.
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