Due to the high extraction cost of titanium, the price is more expensive. Although it has the characteristics of lightweight and high strength, it is also one of the more important factors affecting the manufacturing cost in use. Therefore, how to reduce the cost of titanium during product design The usage has become a more important design requirement.
In the heat exchanger, the embedded tube sheet is an important component. The existing tube sheet and blue titanium heat exchanger have the following shortcomings:
1. Due to the inability to weld titanium to other materials, both flanges and tube sheets require titanium. Therefore, the amount of titanium used has been greatly increased.
2. Because the thickness of the titanium material has a greater influence on the design pressure, when the design pressure increases, the thickness of the flange and the tube sheet will increase simultaneously.
For this reason, researchers have developed a titanium heat exchanger with in-line pipes that adapts to different design pressures and can also adopt a liner ring and live sleeve flange structure.
The structure of the three-layer composite tube sheet titanium heat exchanger includes tube sheets, fixed-distance tubes, tie rods, nuts, anti-loose lugs, support plates, U-shaped heat exchange tubes, and U-shaped heat exchange tubes are multiple, multiple The U-shaped heat exchange tubes are overlapped and passed through the tube sheet. The U-shaped heat exchange tubes are fixed on the support plate through the anti-loosening lugs. A fixed distance tube is arranged between the supporting ears, one end of the tie rod is connected to the tube plate, the other end passes through the fixed distance tube, and the anti-loosing supporting ear is compressed by a nut. The tube plate is made of three-layer composite material. There are five anti-loose ears. There is a fixed connection between the anti-loosening lug and the support plate. A buffer sleeve is arranged between the U-shaped heat exchange tube and the tube sheet. The buffer sleeve between the U-shaped heat exchange tube and the tube sheet is made of steel. After passing through the tube sheet, the U-shaped heat exchange tube is welded to the tube sheet.
Since the U-shaped heat exchange tube is welded to the tube sheet after passing through the tube sheet, and a buffer sleeve is set between the U-shaped heat exchange tube and the tube sheet, the U-shaped heat exchange tube is welded after passing through the tube sheet, and the U-shaped heat exchange tube is welded after passing through the tube sheet. The heat exchange tube is welded to the titanium layer of the tube sheet according to the material, and the buffer sleeve between the U-shaped heat exchange tube and the tube sheet is welded to the middle layer of the tube sheet. The thinner tube sheet thickness is required under the same strength, which reduces the cost. And can be welded freely with other material pipelines.
