JPH069740Y2 - Difficult-to-weld metal container - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a container made of a non-weldable metal such as zirconium which is mainly used in a radioactive solution tank or the like.

[Conventional technology]

A metal container used for a radioactive melting tank or the like is provided with a jacket for heating or cooling the fluid in the container.

Further, this type of container requires a high degree of corrosion resistance in order to maintain its safety, and therefore stainless steel is not sufficient. Conventionally, a zirconium container is generally used. Has a brittle property like titanium alloy and the like, and has a problem that it is difficult to weld, and particularly it is very difficult to weld with other metals.

Here, as shown in FIG. 2 or FIG. 3, in the conventional container made of zirconium, the jacket 4 for cooling is formed by providing the cooling jacket material 2 on the outer periphery of the body plate material 1.

However, the conventional container has a structure of drawing processing shown by an arrow Y in FIG. 2 or fillet welding 3 shown by an arrow X in FIGS. Considering the characteristics of weldable metal, these drawing processes Y
There is a problem in that stress concentrates on the portion of the above and the portion of the fillet weld 3 and the fatigue strength decreases, causing embrittlement of the metal and lowering the reliability.

Further, there is also a problem that the nondestructive inspection of the three portions of the fillet weld by X-ray or the like cannot be sufficiently performed, and it is difficult to confirm the safety level of the welded portion.

[Problems to be solved by the invention]

The present invention has been made in order to solve the above-mentioned conventional problems, in which stress is less concentrated in the welded portion of the jacket portion, a highly reliable welded portion can be obtained, and X-rays at the welded portion are obtained. By enabling non-destructive inspection by
The problem to be solved is to improve the reliability of the metal container which is difficult to weld.

[Means for Solving the Problems]

As a means for solving the above-mentioned problems, the hardly weldable metal container of the present invention is a forging in which a body plate material of the metal container and a cooling jacket material forming a jacket provided on the outer periphery of the body plate material are connected. It is composed of the same material as the connecting material of the cut-out material from the product or the thick plate, and each of the above-mentioned members is joined by butt welding on both sides. Removes disadvantages such as drawing and fillet welding, X
It facilitates the non-destructive inspection of lines.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of a main part of a hardly-weldable metal container according to an embodiment of the present invention.

First, this container is made of zirconium, and a cooling jacket material 2 that forms a cooling jacket 4 on the outer periphery of the body plate material 1, and a connecting material that connects the cooling jacket material 2 and the body plate material 1 to each other. 6 and the body plate member 1 are made of the same material, zirconium.

When forming this container, first, the body plate material 1 and the connecting material 6 are joined by butt welding 5 on both sides, and then a nondestructive inspection such as necessary X-ray imaging is applied to the welded portion, and then the connecting material is joined. 6 and the cooling example material 2 are similarly joined by butt welding 5 on both sides, and a nondestructive inspection by X-ray or the like is performed.

Further, this connecting member 6 is formed by cutting out from a forged product or a thick plate, and all the corners thereof are also R-processed as shown by arrows, and therefore, the conventional container is not drawn.

[Effect of device]

As described above, according to the metal container of the present invention,
There is little stress concentration on the welded part of the jacket part, there is no deterioration of the welded part as in the conventional fillet welding, and cracks do not occur, so there is an effect that reliable welding can be obtained.

Further, in the present invention, since a connecting material formed by cutting out from a forged product or a thick plate is used, it is possible to supply a highly reliable container by eliminating the disadvantages of the conventional container such as drawing and fillet welding. There is.

Furthermore, by rounding the corners of the connecting material, there is no stress concentration and fatigue strength can be increased. All welded parts are butt welded on both sides, enabling non-destructive inspection such as X-ray photography. Therefore, there is an effect that the reliability of the container is improved.

Therefore, the present invention has an advantage that a corrosion-resistant metal material such as zirconium, which is a hardly weldable metal, can be easily used in the container body like a container for storing a dangerous substance such as a radioactive solution.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an essential part side showing an embodiment of a hardly weldable metal container according to the present invention, and FIGS. 2 and 3 are main part sides showing a cooling jacket part of a conventional zirconium container. FIG. 1 ... Body plate material, 2 ... Cooling jacket material, 5 ... Butt welding on both sides, 6 ... Connecting material.

Claims (1)

[Scope of utility model registration request] 1. A body material of a metal container and a connecting material of a machined material from a forged product or a thick plate connecting the cooling jacket material provided on the outer periphery of the body material are formed of the same material, In addition, a metal container that is difficult to weld, in which the above members are joined by butt welding on both sides.