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
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[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] Such as figure 1 , 2 , 3 and 4 show a vacuum heat collector tube with grooved double expansion joints, including glass tube 1, Kovar tube 2, outer expansion joint 3, flange 4, inner expansion joint 5, support sleeve 6, suction Heat pipe 7, getter 8; the glass tube 1 and the Kovar tube 2 are connected by fusion sealing, the Kovar tube 2 and the external expansion joint 3 are connected by welding, and the external expansion joint 3 and the flange 4 are connected by welding Connection, the flange 4 and the inner expansion joint 5 are connected by welding, the inner expansion joint 5 and the support sleeve 6 are connected by welding, the support sleeve 6 and the heat absorption pipe 7 are connected by welding, and the getter 8 is placed in the vacuum tube.
[0022] The heat collecting tube adopts an outer expansion joint 3 and an inner expansion joint 5, and both ...
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