JP2001335077A - Sealing container for highly active material and its sealing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing container for a highly active material and its sealing method, capable of easily sealing the interior of the container in a closed state under the condition that an inert gas is confined in the interior under a predetermined pressure. SOLUTION: The sealing container comprises a container member 11 made of heat-resistant metal to store a sample 1 therein and a lid member 12 for the opening 11a of the container member. The opening of the container member is formed into the shape of a hollow cylinder, and the lid member has a cylindrical face 12a which is fitted into this hollow cylinder while leaving a gap therebetween. The opening 11a is closed with the lid member 12 and, under the condition that the interior of the container member is decompressed down to a predetermined pressure level through the gap, lap welding 14 of both the opening 11a and the cylindrical face 12a is performed to seal the interior.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for enclosing a highly active material and a method for enclosing the container.

[0002]

2. Description of the Related Art For example, to measure the diffusion coefficient between a natural product 1a of a highly active sample 1 (for example, lithium and Li) and its isotope 1b, as shown in FIG. The object 1a and the isotope 1b are stored in a cylindrical holding container 3 in a state where the isotope 1b is brought into close contact with the interface 2, and the temperature is raised to obtain the natural product 1a.
And its isotope 1b must be dissolved and solidified. Since the samples 1a and 1b undergo thermal expansion and contraction during the melting and coagulation, the lid of the holding container 3 includes a fixed lid 3a and a movable lid 3a.
b, and a compression spring 3c sandwiched therebetween in a compressed state, and biases the natural product 1a toward its isotope 1b. The holding container 3 and the fixed lid 3
a, the movable lid 3b, and the compression spring 3c can be made of, for example, boron nitride (BN) having high heat resistance.

Further, a sample 1 (natural product 1a and isotope 1
When the activity of b) is high, it is difficult to handle and store the holding container 3 as it is, so that the holding container 3 is sealed in a heat-resistant metal sealed container 4 as shown in FIG. There is a need to. Further, an inert gas which does not react with the sample is sealed in the sealed container 4 at a predetermined pressure. This pressure is, for example, when testing a variety of samples under the same conditions,
To keep the pressure at the melting temperature constant (for example, normal pressure), the pressure of the filled gas is set to a negative pressure (for example, 0.4 ata).

[0004] The sealed container 4 thus manufactured can be easily handled with the sample 1 and the holding container 3 sealed therein, and the sealed container 4 is directly lifted in a melting test furnace, for example, in space or the like. Upon heating, the prescribed test can be performed.

[0005]

However, it has been conventionally difficult to enclose the sample 1 in such a sealed container 4. That is, the physical property test of a particularly high-active material such as lithium includes all the operations of storing the sample 1 in the holding container 3 and enclosing the holding container 3 in the sealed container 4 in order to suppress deterioration such as oxidation. The operation must be performed in a glove box. In particular, it is difficult to accommodate the holding container 3 in the sealed container 4 and to seal the sealed container 4 with the inert gas sealed therein at a predetermined pressure. There was a problem.

The present invention has been made to solve such a problem. That is, an object of the present invention is to provide a highly active material encapsulation container and an encapsulation method that can easily enclose the interior in a hermetically sealed state with an inert gas enclosed therein at a predetermined pressure. .

[0007]

According to the present invention, a heat-resistant metal container member (11) for storing a sample (1) therein.
And a lid member (1) for closing the opening (11a) of the container member.
2), wherein the opening of the container member is formed in a hollow cylindrical shape, and the lid member has a cylindrical surface (12a) fitted into the hollow cylindrical shape with a gap, thereby covering the opening (11a). The opening (11a) and the cylindrical surface (12a) are closed with the member (12), and the inside is reduced to a predetermined pressure from the gap.
And encapsulating the interior by welding.

Further, according to the present invention, a heat-resistant metal container member (11) for storing a sample (1) therein is provided with a hollow cylindrical opening (11a), and fitted into the hollow cylindrical shape with a gap. The opening (11a) is closed with a cover member (12) having a round cylindrical surface (12a), and the opening (11a) and the cylindrical surface (12) are closed in a state where the inside of the opening (11a) is reduced to a predetermined pressure from the gap.
and a method for enclosing the inside of the highly active material by welding a).

According to the apparatus and method of the present invention, the heat-resistant metal container member (11) for storing the sample (and the holding container) inside has the hollow cylindrical opening (11a),
In addition, since the cylindrical surface (12a) of the lid member (12) fits into this hollow cylindrical shape with a gap, the sample is stored inside in an inert gas atmosphere in the glove box, and the lid member (12)
With the opening (11a) closed, the inside can be decompressed through the gap. Further, in this state, the opening (1)
By overlapping welding of 1a) and the cylindrical surface (12a) from the outside by TIG or laser welding, the inside can be easily sealed in a state where the inert gas is sealed at a predetermined pressure. In particular, by performing welding in a non-penetrating manner, even if there is a difference in pressure between the inside of the glove box and the inside of the container, welding can be reliably performed without being affected by the molten metal.

Therefore, by using the enclosure and the method for enclosing the same according to the present invention, the encapsulation work by welding in the glove box becomes relatively easy, and any material is enclosed in the glove box regardless of the activity of the material. By enclosing in a container and then taking it out of the glove box, it becomes possible to carry out various physical property inspection tests easily and with high accuracy.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In the drawings, common portions are denoted by the same reference numerals, and redundant description is omitted.
FIG. 1 is a view showing the configuration of a container for enclosing a highly active material according to the present invention, wherein (A) shows an empty container before enclosing the sample, and (B) shows a container enclosing the sample. As shown in FIG.
The sealed container 10 of the present invention includes a container member 11 made of a heat-resistant metal for storing the sample 1 therein, and an opening 11 a of the container member 11.
And a lid member 12 for closing the cover. In this example, one end (the right end in the figure) of the container member 11 is closed by welding the closing member 11b. The bottom may be provided integrally with the container member 11 by extrusion or the like without using the closing member 11b.

The opening 11a of the container member 11 is formed in a hollow cylindrical shape large enough to pass the sample 1 to be stored therein and the holding container 3 for storing the sample. Note that, in this example, the entire container member 11 is a hollow cylindrical shape having the same diameter, and the hollow cylindrical holding container 3 described later is accommodated with almost no gap, but the present invention is not limited to this. Instead, the internal shape may be different from that of the sample 1 or the holding container 3.

The lid member 12 has a cylindrical surface 12a, and the cylindrical surface 12a is a hollow cylindrical opening 11a of the container member 11.
The dimensions are determined so that they fit in the gaps. This gap is preferably narrow as long as gas can pass through the gap when depressurizing the inside. Further, the enclosure 10 (the container member 11 and the lid member 12) is formed of a material (for example, stainless steel) having heat resistance enough to withstand the test temperature of the sample 1 and which can be easily welded to each other.

FIG. 1B shows a state in which the sample 1 and its holding container 3 are sealed in the above-described sealing container 10. As shown in this figure, by closing the opening 11a of the container member 11 with the lid member 12,
The inside is hermetically sealed with an inert gas sealed therein at a predetermined pressure.

FIGS. 2A and 2B are schematic views of a method for enclosing an enclosure according to the present invention. FIG. 2A shows a holding vessel 3 containing a sample 1, FIG. The steps are shown. As shown in this figure, in the enclosing method of the present invention, a hollow cylindrical opening 11a is provided in advance in a heat-resistant metal container member 11 for storing the sample 1 therein, and the hollow cylindrical shape is fitted with a gap therebetween. A lid member 12 having a round cylindrical surface 12a is prepared. Next, as shown in (B), the opening 11a is closed with the lid member 12, and the inside is reduced to a predetermined pressure from the opening through the opening 11a of the container member 11 using an elastic exhaust pipe 13 or the like. In this state, the opening 11a and the cylindrical surface 12a are overlap-welded 14 by TIG welding, laser welding, seam welding or the like from the outside as shown in FIG.

In the depressurizing step (B), the cover 1
In order to prevent the second member 2 from moving in the opening 11a, it is preferable that the container member 11 be partially recessed from the outside of the opening 11a at a predetermined position. Further, by performing this operation in an inert gas atmosphere in the glove box, the inside can be easily sealed in a sealed state while the inside is sealed in a predetermined gas atmosphere (for example, an inert atmosphere). In particular, by performing welding in a non-penetrating manner, even if there is a difference in pressure between the inside of the glove box and the inside of the container, welding can be reliably performed without being affected by the molten metal.

According to the apparatus and method of the present invention described above,
The heat-resistant metal container member 11 for storing the sample 1 (and the holding container 3 therein) has a hollow cylindrical opening 11a, and the cylindrical surface 12a of the lid member 12 is fitted into the hollow cylindrical shape with a gap. Therefore, the sample can be stored inside in an inert gas atmosphere in the glove box, and the inside can be depressurized through the gap with the lid member 12 closing the opening 11a. Further, in this state, the opening 11a and the cylindrical surface 12a are overlap-welded from the outside by TIG or laser welding, so that the inside is easily sealed in a state in which the inert gas is sealed at a predetermined pressure. be able to. In particular, by performing welding in a non-penetrating manner, even if there is a difference in pressure between the inside of the glove box and the inside of the container, welding can be reliably performed without being affected by the molten metal.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

[0019]

By using the above-mentioned enclosure and the method for enclosing the same according to the present invention, the encapsulation work by welding in the glove box becomes relatively easy, and any material can be stored in the glove box regardless of the activity of the material. Then, by taking it out of the glove box and taking it out of the glove box, various physical property inspection tests can be easily and accurately performed.

That is, the container for enclosing a highly active material and the method for encapsulating the same according to the present invention are excellent in that the inside can be easily sealed in a sealed state with an inert gas sealed at a predetermined pressure. Has an effect.

[Brief description of the drawings]

FIG. 1 is a structural view of a highly active material enclosing container according to the present invention.

FIG. 2 is a schematic view of a method for enclosing an enclosure according to the present invention.

FIG. 3 is a schematic view of a conventional enclosure.

[Explanation of symbols]

 Reference Signs List 1 sample (highly active sample) 1a natural product 1b isotope 2 interface 3 holding container 3a fixed lid 3b movable lid 3c compression spring 4 sealed container 10 enclosure container 11 container member 11a opening 11b closing member 12 lid member 12a cylindrical surface 13 exhaust Pipe 14 lap welding

Continued on the front page (72) Inventor Akira Tanji 2-2-1 Otemachi, Chiyoda-ku, Tokyo Ishikawajima-Harima Heavy Industries, Ltd. F-term (reference) 3E067 AA11 AB99 AC03 BA01B BA01C BB11B BB11C BC03B BC03C CA17 EA18 EA32 EA40 FA04 FC01 GA15 GA19

Claims (2)

[Claims] 1. A container member (11) made of a heat-resistant metal for storing a sample (1) therein, and an opening (11a) of the container member.
And an opening of the container member is formed in a hollow cylindrical shape, and the lid member has a cylindrical surface (12a) fitted into the hollow cylindrical shape with a gap therebetween. (11a) is closed by the lid member (12), and the opening (11a) is closed in a state where the inside is reduced to a predetermined pressure from the gap.
And a cylindrical surface (12a) welded to encapsulate the inside. 2. A cylindrical surface (12a) which is provided with a hollow cylindrical opening (11a) in a heat-resistant metal container member (11) for storing a sample (1) therein, and which is fitted into said hollow cylindrical shape with a gap.
The opening (11a) is closed by a cover member (12) having a gap, and the inside is sealed by welding the opening (11a) and the cylindrical surface (12a) in a state where the inside is reduced to a predetermined pressure from the gap. A method for enclosing a highly active material encapsulation container.