JPH071548Y2 - Difficult-to-weld metal container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a non-weldable metal container made of zirconium or the like, which is mainly used in a chemical plant device, a nuclear radioactive solution tank, and the like.

[Conventional technology]

In recent years, metal containers used for radioactive melting tanks, etc.
Since there is a large temperature difference between the inside and outside of the container and hydrostatic pressure is applied inside the container, the container body may be deformed.

Further, this type of container requires a high degree of corrosion resistance in order to maintain its safety, etc., so that stainless steel is not sufficient, and conventionally zirconium containers have been generally used. Similar to alloys and the like, it has brittle properties and is difficult to weld. In particular, welding with other metals is very difficult.

Therefore, in the conventional rectangular container as shown in the side view of FIG. 6, the plan view of FIG. 7 and the side sectional view of the main part of FIG.
A flat plate reinforcing rib member 2 is provided in a ladder shape on the outer periphery of the body plate member 1 of the container to reinforce the container for preventing deformation of the container.

However, since these reinforcing rib members 2 are attached to the body plate member 1 of the container by fillet welding 3 as shown in FIG. 8, there is a problem that the reliability of the weldability is poor.

Further, when welding the thick portion of the reinforcing rib material 2, it is difficult to sufficiently spread the gas seal with an inert gas or the like, so that embrittlement due to oxidation occurs, stress concentrates on this portion, and fatigue strength particularly decreases. There is a problem of bringing.

Further, the 3 parts of the fillet weld can only be subjected to a liquid penetrant flaw detection test and cannot be subjected to a nondestructive inspection by X-rays, resulting in poor reliability.

[Problems to be solved by the invention]

The present invention has been made in order to solve the above-mentioned conventional problems, and because it is a non-weldable metal container, it is possible to perform non-destructive inspection by X-ray of a welded portion and liquid penetrant flaw detection test. An object of the present invention is to provide a weldable metal container which has a high container reliability and can reduce the cost.

[Means for Solving the Problems]

As a means for solving the above problems, the hardly-weldable metal container of the present invention comprises a reinforcing rib material surrounding the entire circumference of the hardly-weldable metal container, and a container shell plate material of the same quality as the reinforcing rib material. A container is formed by joining by butt welding on both sides, and a reinforcing member made of a low grade steel such as carbon steel or stainless steel is attached to the reinforcing rib material with a bolt.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings, in which the same parts are denoted by the same part numbers.

First, FIG. 1 is a side sectional view of a main part of a hardly weldable metal container in Embodiment 1 of the present invention, FIG. 2 is a side view of FIG. 1, and FIG.
The figure is a plan view of FIG.

This container is made of zirconium, and the reinforcing rib material 2 that surrounds the entire circumference of the container and the body plate material 1 of the container are made of zirconium, which is the same material, and these are joined by butt welding 5 on both sides. There is.

The reinforcing rib material 2 is made of a forged material or a thick plate material, and is appropriately R-processed as shown in FIG. 1, and the both-sides butt welding 5 portion is also separated from this R-processing portion. Therefore, stress is not concentrated and fatigue strength is improved.

In the first embodiment, the vertical reinforcing member 6 is attached between the plurality of reinforcing rib members 2.

Next, since the metal container of Example 2 shown in the side sectional view of the main part of FIG. 4 has substantially the same structure as that of Example 1, the reinforcing rib material 2 made of zirconium similar to that of FIG. 1 is used. An L-shaped or H-shaped reinforcing member 7 is attached to the rib portion of with a bolt 8.

Since zirconium is an expensive metal material, a relatively inexpensive reinforcing member 7 such as carbon steel or stainless steel is used to reduce the material of the reinforcing rib material 2 made of zirconium as much as possible to make an inexpensive container. This is because the zirconium is supplied, and since it is very difficult to weld zirconium to other foreign metals, the reinforcing member 7 is attached by tightening the bolt 8.

Further, Example 3 shown in the side sectional view of the main part of FIG. 5 has the same configuration as that of Example 2, and the body rib material 1 and the reinforcing rib material 2 joined by the butt welding 5 on both sides are made of zirconium. By using a ring-shaped plate made of aluminum, the amount of material used for the expensive reinforcing rib material 2 of zirconium is minimized, and the reinforcing ring 9 made of carbon steel, stainless steel or the like has the function of the reinforcing support structure, and thus an inexpensive container. It is what

Also in this third embodiment, the reinforcing ring 9 is attached to the reinforcing rib member 2 with the bolt 8, and the inexpensive reinforcing rib 10 such as carbon steel or stainless steel is attached to the reinforcing ring 9 in the vertical direction. The reinforcing rib 10 is used as a reinforcing member.

[Effect of device]

As described above, the present invention forms the container by joining the reinforcing rib material surrounding the entire circumference of the hardly weldable metal container and the container shell plate material of the same material as the reinforcing rib material by butt welding on both sides. , Non-destructive inspection by X-ray of welded part and liquid penetrant flaw detection test are possible, and reliability is high even for a metal container that is difficult to weld.

Furthermore, since reinforcing members made of low-grade steel such as carbon steel and stainless steel are attached to the reinforcing ribs attached by butt welding with bolts, material costs and manufacturing costs can be reduced. The container can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a side sectional view of a main part of a metal container according to Embodiment 1 of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a plan view of FIG. 2, and FIG. FIG. 5 is a side sectional view of an essential part of the metal container of FIG. 5, FIG. 5 is a side sectional view of an essential part of the metal container of Example 3, FIG. 6 is a side view of a conventional rectangular container, and FIG. A plan view and FIG. 8 are cross-sectional views of the main part of FIG. 1 ... Body plate material, 2 ... Reinforcing rib material, 5 ... Butt welding on both sides, 6,
7 ... Reinforcing member, 8 ... Bolt, 9 ... Reinforcing ring, 10 ... Reinforcing rib.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A reinforcing rib material which surrounds the entire circumference of a hardly weldable metal container, and a container shell plate material made of the same material as the reinforcing rib material are joined by butt welding on both sides to form a container. A non-weldable metal container in which a reinforcing member made of low-grade steel such as carbon steel or stainless steel is attached to the rib material with bolts.