JPS6361890A - Heat pipe - Google Patents

Abstract

PURPOSE:To prevent the expansion of a sealing pipe accompanying a pressure increase in the pipe by applying sealing in such a manner that a press- pressurized part at the end of the pipe is spot-welded. CONSTITUTION:A heat pipe 1 has a press-pressurized part 3 formed in a flat shape at the end of a sealing pipe 2 in which working fluid 5 is sealed. The end edge 3a of the part 3 is sealed by a TIG weld zone 4 which is formed by the welding of the TIG weld as usual. At the part 3 a few points, for instance, three points of spot weld 6 are welded to join mechanically the inside surfaces in the part 3. Thereby, though the part 3 of the pipe 2 tends to expand in the radius direction as the pressure in the pipe 2 is increased, the expansion is prevented by the parts of the spot weld 6 and the generation of cracks etc. due to stress concentration at the zone 4 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat pipe which is an 8-transfer element, and is particularly characterized by a sealing structure that has an important influence on the reliability and quality of heat transfer performance. Regarding a certain heat vibe.

[Prior Art] Generally, a heat vibrator has a working fluid such as wood or alcohol sealed inside a sealed tube, and when one end is heated, the fluid becomes air and flows to the other end, where it radiates heat and becomes a liquid. ,
The structure is such that the liquid returns to the heating section by capillary action, and this action causes heat to be transferred from the heating section to the heat radiation section.

Conventionally, as a means to heat the encapsulated tube, a press pressure section is formed at the end of the encapsulation tube, and the edge of the press pressure section is welded by TIG welding.

[Dark problem to be solved] The conventional heat pipe described above has a structure in which the working fluid pressure of the heat vibrator is increased by 111 times only by TIG welding, so when the dynamic pressure of the heat pipe increases, the pressure inside the sealed tube increases. As the pressure increases, the tube expands radially and the TI
Stress concentration occurs in the G weld, causing cracks, etc.
It has the disadvantage of causing hydraulic fluid leakage.

``Means for Solving Problems'' The present invention has been made to solve the problems of the conventional two-legged system. The heat pipe is sealed by welding the end edge of the ↓- entry tube end and is sealed by welding the pressurized section at the end of the filled tube. This is to prevent the enclosing tube from expanding due to 11-.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

This heat vibrator 1 has a press pressurizing part 3 formed flatly at the end of a sealed tube 2 in which a working fluid 5 is contained.

The edge 3a of this press pressing section 3 is TI
TIG welding part 4 formed by welding by G welding
It is sealed.

In the case of sealing using only the TIG weld 4, as the pressure inside the encapsulation tube 2 increases, the pressurized portion 3 of the encapsulation tube 2 expands in the radial direction, and stress concentrates on the TIG weld 4. Therefore, spot welding 6 is performed at several points (three points in this example) on the press pressurizing part 3, and the inner surfaces of the press pressurizing part 3 are mechanically welded. I am trying to connect it to.

Therefore, even if the press pressurized part 3 of the sealed tube 2 tries to expand in the radial direction due to an increase in the pressure inside the sealed tube 2, the spot weld 6 suppresses the expansion and concentrates stress on the TIG welded part 4. This makes it possible to prevent cranks and the like from occurring.

[Effects of the invention] As mentioned in 5J, in addition to welding the edge of the press pressurizing part of the sealed tube, the heat vibrator of the unexploited FJJ also welds the press pressurizing part of the sealed tube. Spot welding has the effect of firmly holding the sealing part even when the pressure of the working fluid in the heat pipe increases, and also prevents leakage of the working fluid, allowing for the manufacture of highly reliable heat vibs. This has the effect of making it possible.

[Brief explanation of the drawing]

FIG. 1 is a top view showing one embodiment of the present invention, and FIG.
FIG. 3 is a partially enlarged view of FIG. 2. 1: Heat pipe 2 2 Enclosed tube 3 Nibles pressurization book 4: TIG welding part 5: Working fluid 6: Spot welding

Claims (1)

[Claims] In a heat pipe that is sealed by welding the edge of a press pressurized part formed at the end of an enclosure tube that encloses a working fluid, the press pressurize part at the end of the seal tube is sealed by spot welding. A heat pipe characterized by: