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 explained below in conjunction with the drawings.
[0021] Such as figure 1 , 2 , 3 and 4 show a trough-type double expansion joint vacuum heat collector tube, including glass tube 1, Kovar alloy tube 2, outer expansion joint 3, flange 4, inner expansion joint 5, support sleeve 6, suction tube Heat pipe 7, getter 8; the glass tube 1 and the Kovar alloy tube 2 are connected by welding, the Kovar alloy tube 2 and the outer expansion joint 3 are connected by welding, and the outer expansion joint 3 and flange 4 are connected by welding For 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 tube 7 are connected by welding, and the getter 8 is placed in the vacuum tube.
[0022] The heat collection tube adopts an outer expansion joint 3 and an inner expansion joint 5, and both expansion jo...
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