Open type vacuum heat collecting pipe and heat collecting device comprising same
A technology of vacuum heat collecting tubes and heat collecting devices, which is applied in the direction of solar heat collectors, solar heat collector safety, and solar heat collectors using working fluids, etc. It can solve problems such as vacuum failure and tube expansion coefficient differences, and achieve operational low cost effect
Inactive Publication Date: 2019-09-13
周文正
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Problems solved by technology
[0005] But after all, there is a difference in the tube expansion coefficient of metal and glass, and it is easy to cause vacuum failure
Method used
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[0023] A preferred embodiment is that the outer wall of the metal inner tube 2 with threaded or airtight welded threaded joint 7 is coated with solar absorbing material and the glued position with the glass outer tube 1 is left blank or cleaned, and the metal pumping tube 2 is sequentially inserted. The elastic metal cover 4 of the trachea 3 and the glass outer tube use high-temperature glue 5 to seal the gap between the joints. In order to ensure the tightness of the colloid and the pipe fittings, the colloid can be tightened with a clamp that is consistent with the expansion coefficient of each pipe fitting. The inside of the clamp and the outside of the colloid Thin-walled metal hoses can be placed, and the reinforced open vacuum heat collector is equipped with a clamp-type corrugated connecting pipe 13 at the joint of the glass outer pipe. The clamp-type corrugated connecting pipe 13 means that there are longitudinal corrugations and Metal bellows with clamps to ensure the ...
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The invention provides an open type vacuum heat collecting pipe simple in connection and capable of continuously extracting gas to keep the vacuum and a heat collecting device comprising the heat collecting pipe. According to the heat collecting pipe and the heat collecting device, elastic metal covers and high-temperature-resistant rubber are arranged, a gap is formed between the a glass pipe anda metal pipe, wherein the glass pipe and the metal pipe have the close expansion coefficients and are sealed through clamping hoops, a metal air suction pipe is arranged to form an open space in which air suction can be carried out, the open type vacuum heat collecting pipe is used for achieving the sealed communication connection between the metal inner pipe with a main pipe in a series or parallel connection mode, the main pipe communicates with a water supplementing tank, the metal air suction pipe communicates with an air suction main pipe, the air suction main pipe communicates with a vacuum pump through an air suction pipe connector, and a heat preservation material is used for preserving heat. The operation cost is low, and the heat preservation effect is durable.
Description
technical field [0001] The invention relates to the fields of making solar vacuum heat collecting tubes and solar heat collecting and utilizing devices, in particular to an open vacuum heat collecting tube and a heat collecting device thereof. [0002] technical background [0003] Solar energy has the advantages of no pollution, inexhaustible supply and low cost. The utilization of solar heat collection has achieved great development in our country, especially solar water heaters, which have made great contributions to environmental protection and have broad application prospects. [0004] Glass-metal vacuum tubes are common components for medium and high temperature solar heat collection and utilization. Due to the difference in expansion coefficient of the inner and outer tubes, many scientific research institutions at home and abroad have designed many connection methods to solve vacuum failures, mainly in transition metals, welding materials, glass tube interfaces, weldin...
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IPC IPC(8): F24S10/40F24S10/70F24S40/46
CPCY02E10/44
Inventor 周文正
Owner 周文正