JPH0726800U - High temperature isotropic pressurizing device using protective capsule - Google Patents

Abstract

(57) [Abstract] [Purpose] A protective container that prevents damage to the heater and the like due to capsule damage that may occur when impurities are mixed into the capsule during volume reduction stabilization treatment of the hull and the like by the HIP method. To prevent welding between the support and the support. [Constitution] In an apparatus in which a capsule filled with a hull or the like is mounted in a pressure vessel with a built-in heater, and the hull or the like is diffusion-bonded under high temperature isotropic pressure with an inert gas as a pressure medium to stabilize the volume reduction. A protective container capable of accommodating a capsule and having a hole through which a pressure medium can be inserted is installed on a support table in the pressure container through a welding prevention plate, and the capsule is accommodated in the protective container. To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high-temperature isotropic pressurizing device using a protective capsule that is designed to stabilize the volume of dissolved residues (hulls, etc.) of coating pipes, aggregate members, etc. generated in the reprocessing process.

[0002]

[Prior art]

 The HIP (HOT ISOSTATIC PRESSING) method is used as one of the volume reduction stabilization treatment techniques for the dissolution residue (hulls, etc.) of coating pipes, assembly members, etc. generated in the reprocessing step. In the HIP method, a capsule filled with hulls, etc. is loaded in a pressure vessel, and the synergistic effect of high isotropic pressure and high temperature using a gas such as argon as a pressure medium causes diffusion bonding of the hulls, etc. to stabilize volume reduction. This is a technology to be pursued.

[0003]

[Problems to be solved by the device]

 However, when filling the hull etc. into the capsule, impurities such as organic substances and water may be mixed due to selection omission. If HIP treatment is performed with impurities mixed, gas will be generated inside the capsule. The pressure will rise and the capsule will be damaged, which may damage the heater in the pressure vessel. The present invention is intended to solve the above problems and prevents damage to a heater or the like due to capsule damage that may occur when impurities are mixed into the capsule in the volume reduction stabilization treatment of the hull or the like by the HIP method. In addition, the purpose is to prevent welding between the protective container and the support.

[0004]

[Means for Solving the Problems]

 The present invention is an apparatus in which a capsule filled with a hull or the like is mounted in a pressure vessel with a built-in heater, and the hull or the like is diffusion-bonded under high temperature isotropic pressure with an inert gas as a pressure medium to stabilize the volume reduction. In (1), a protective container that can accommodate a capsule and is provided with a hole through which a pressure medium can enter is installed on the support base in the pressure container through the welding prevention plate, and the capsule is accommodated in the protective container. Characterize.

[0005]

[Action]

 In the present invention, when mounting a capsule filled with a hull or the like in a pressure container, the cuff cell is housed in a protection container, and a hole is formed in the lid of the protection container so that argon gas as a pressure medium can enter. In addition, a welding prevention plate made of alumina is installed between the protective container and the support, and since the capsule is stored in the protective container, even if the capsule is damaged, the heater etc. cannot be protected. It can be sufficiently performed, and the welding prevention plate can prevent welding between the protective container and the support.

[0006]

【Example】

 FIG. 1 is a conceptual diagram of a HIP body for explaining a pressure protection capsule of the present invention. In the figure, 1 is a pressure vessel, 2 is a heater, 3 is a capsule, 4 is a hole, 5 is a protective vessel, 6 is a support, 7 is a welding prevention plate, 8 is a high pressure cylinder, 9 is a heat insulating layer, 10 is an upper lid, 11 is a lower lid. As shown in FIG. 1, in the HIP device main body, a heat insulating layer 9 was provided in the pressure vessel 1 in which the upper and lower sides of the high-pressure cylinder 8 were closed with an upper lid 10 and a lower lid 11, and a hull or the like was filled inside the pressure vessel 1 with a support base 6. The structure is such that the capsule 3 is supported.

In the HIP method, a capsule 3 filled with a hull or the like is mounted in a pressure vessel 1, and a gas such as argon is used as a pressure medium to diffusely bond the hull or the like by a synergistic effect of high isotropic pressure and high temperature. When filling capsules, hulls, etc. into the capsules, impurities such as organic substances and water may be mixed due to selection omissions. If HIP processing is performed with impurities mixed in, the gas inside the capsules 3 The pressure rises and the capsule is broken, which may damage the heater 2 and the like. Therefore, in the present invention, the SU S304 protective container 5 which is placed in the pressure container 1 and can accommodate the capsule 3 is manufactured, and the capsule 3 is accommodated in the protective container 5 and then subjected to the HIP treatment. It is designed to prevent damage to the heater 2 etc. due to breakage of the.

A hole 4 is formed in the upper lid of the protective container 5 so that argon gas as a pressure medium can enter. In addition, when HIP treatment is performed with the protective container 5 placed on the graphite support base 6 as it is, a eutectic reaction occurs between the protection container 5 and the support base 6, and the protection container 5 and the support base 6 are welded to each other. Therefore, in order to prevent this, an adhesion preventive plate 7 made of alumina is installed to prevent the eutectic reaction.

[0009]

[Effect of device]

 As described above, according to the present invention, in the previous verification tests, the capsule expanded due to the increase in the internal pressure, but the capsule was not broken. However, in future verification tests or in the practical stage, even if the capsule is broken, the heat can be sufficiently protected, and the welding prevention plate can prevent welding between the protective container and the support base. .

[Brief description of drawings]

FIG. 1 is a conceptual view of a HIP body for explaining a pressure protection capsule of the present invention.

[Explanation of symbols]

1 ... Pressure vessel, 2 ... Heater, 3 ... Capsule, 4 ... Hole, 5
... Protective container, 6 ... Supporting base, 7 ... Adhesion prevention plate, 8 ... High pressure cylinder, 9 ... Heat insulating layer, 10 ... Upper lid, 11 ... Lower lid.

Claims (1)

[Scope of utility model registration request] 1. A capsule filled with a hull or the like is mounted in a pressure vessel with a built-in heater, and the hull or the like is diffusion-bonded under high temperature isotropic pressure with an inert gas as a pressure medium to stabilize the volume reduction. In the device, a protective container capable of accommodating a capsule and having a hole through which a pressure medium can enter is installed on a support base in the pressure container through an anti-welding plate, and the capsule is accommodated in the protective container. A high-temperature isotropic pressurizing device using a characteristic protective capsule.