JPH0335036B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) TECHNICAL FIELD The present invention relates to a high pressure vessel.

(Prior art) A screw type or a press frame type is used as a hydrostatic pressurizing device that compresses and forms high-pressure treated raw materials using a pressure medium, but the former has problems with the fatigue strength of the threaded portion. However, when attaching and detaching the screw cap is complicated and high productivity is required, a press frame type hydrostatic pressurizing device is often used.

(Problems to be Solved by the Invention) In recent years, in the press frame type hydrostatic pressurizing device, the molding pressure is extremely high (3000 Kgf/cm ² to 5000 Kgf/cm
² ) It is becoming popular. When maintaining such ultra-high pressure, the high-pressure vessel must maintain its wall pressure (i.e., outer/inner diameter ratio).
However, if the internal pressure is high, even if the outer-inner diameter ratio is set to 3 to 4 or more, it will have little effect in reducing the stress generated on the inner surface of the high-pressure vessel, and this high stress will shorten the effective life of the high-pressure vessel. This results in restrictions on

Conventionally, as a countermeasure to this problem, methods such as shrink fitting have been used to impart compressive residual stress to the inner surface of the high-pressure container, but there are limits to their effectiveness at ultra-high pressures.

The present invention has been proposed in view of the above-mentioned problems, and its purpose is to prolong the useful life of the high-pressure vessel body and pressure intensifier vessel without increasing their wall thickness. The point is that we are trying to propose a high-pressure container that can be used.

(Means for Solving the Problems) In order to achieve the above object, the high-pressure vessel of the present invention has a cylindrical pressure vessel having an opening at one end disposed within the high-pressure vessel main body, and the pressure vessel A stepped lid having a larger pressure receiving area on the high pressure container main body side than the pressure receiving area on the pressure intensifying container side is fitted into the opening hole so as to be movable in the stepped direction.

Further, in the high-pressure container of the present invention, a substance having higher compressibility than the pressure medium supplied into the pressure-increasing container is sealed between a portion of the stepped lid having a large pressure-receiving area and the pressure-increasing container.

(Function) The high-pressure container of the present invention is constructed as described above, and the object to be subjected to high-pressure treatment is put into the pressure intensifier container, the pressure medium is filled into the pressure intensifier container, and the stepped lid is placed inside the pressure intensifier container. Fit it into the hole. Next, the pressure intensifying container is put into the high pressure container main body, pressure medium is filled into the high pressure container main body, the stepped lid is moved to the pressure intensifying container side, and pressurization is started. This movement of the stepped lid toward the pressure intensifying container increases the pressure within the pressure intensifying container, and the stepped lid stops when the axial forces due to the pressures acting on the top and bottom surfaces are balanced. At this time, the diameter of the top surface of the lid is D ₁ ,
If the pressure is P ₁ , the diameter of the bottom surface of the lid is D ₂ , and the pressure is P ₂ , πP ₁ /4×P ₁ = πD ₂ /4×P ₂ ∴P ₂ /P ₁ = (D ₁ /D ₂ ) ² A pressure (P ₂ ) is obtained in the intensifier vessel.

(Embodiment) Next, the high-pressure vessel of the present invention will be explained with reference to an embodiment shown in FIG. Both 1 and 2 are cylindrical.

Reference numeral 4 denotes a stepped lid of the pressure intensifying container 2, and the stepped lid 4 has a stepped stone shape with a larger cross-sectional area at the top than at the bottom.

3 is a lid guide. Note that the lid guide 3 may be integrated with the pressure intensifying container 2.

Further, reference numeral 5 denotes a pressure medium injection/discharge passage, and a high pressure valve 6 is provided in the middle thereof.

Further, 7, 8, and 9 are gaskets, and 10 is an object to be subjected to high pressure treatment, and the object to be subjected to high pressure treatment 10 is put into the pressure increasing container 2. In addition, 12 is a pressure medium, and the pressure medium 12
is filled in the high pressure container main body 1 (around the pressure intensifier container 2) and inside the pressure intensifier container 2.

Further, 11 is a compressible filling or a gas phase, and the same substance 11 has a much larger compressibility than the pressure medium 12, and when the stepped lid 4 receives a load on its upper surface 4a, the same substance 11 It is pushed into the pressure intensifying container 2 against the pressure.

Next, the operation of the high pressure container shown in FIG. 1 will be explained in detail. The object to be subjected to high pressure treatment 10 is placed into the pressure intensification container 2, the pressure medium 12 is filled into the pressure intensification container 2, and the stepped lid 4 is fitted into the hole 2a of the pressure intensification container 2. Next, the pressure booster container 2 is put into the high pressure container main body 1, and the pressure medium 12 is filled into the high pressure container main body 1. Then, the stepped lid 4 receives a load on its upper part 4a, moves toward the pressure intensifying container 2, and starts pressurizing. As the stepped lid 4 moves toward the pressure intensifying container 2, the pressure inside the pressure intensifying container 2 increases, and the stepped lid 4 stops when the axial forces due to the pressures acting on the upper and lower surfaces are balanced. At this time, adjust the diameter of the top surface of the lid.
D ₁ , the pressure is P ₁ , the diameter of the bottom surface of the lid is D ₂ , and the pressure is P ₂ , πP ₁ /4×P ₁ = πD ₂ /4×P ₂ ∴P ₂ /P ₁ = (D ₁ /D ₂ ) ² pressure P ₂ is obtained in the pressure intensifier vessel 2. Note that since the high pressure valve 6 is closed, the pressure medium 12 in the pressure intensifying container 2 does not flow out to the outside and is maintained at the above pressure state. When the compression formation of the object 10 to be high-pressure processed is completed and the pressure inside the high-pressure container main body 1 is lowered, the stepped lid 4 is raised by the pressure inside the pressure-intensifying container 2, and the pressure inside the pressure-increasing container 2 is also lowered.

(Effects of the Invention) The high-pressure washing machine of the present invention is configured as described above, and even if the pressure inside the high-pressure container body 1 is relatively low, the high pressure can be increased by ^twice as high as (D ₁ /D ₂ ). obtained in container 2.

In addition, the pressure inside the pressure intensifier vessel 2 is extremely high, but since there is a pressure medium on the outside, the pressure intensifier vessel 2 only takes care of the difference between the internal and external pressures, and the wall thickness of the high pressure vessel viscous body 1 and the pressure intensifier vessel 2 is Even without increasing the size, each container 1,
The useful life of 2 can be extended.

In addition, a substance 11 having higher compressibility than the pressure medium supplied into the pressure intensifier container 2 is sealed between the part of the stepped lid 4 that has a large pressure receiving area and the pressure intensifier container 2. When the pressure is increased, the stepped lid 4
can be moved toward the pressure intensifying vessel 2 side without resistance, and the pressure inside the pressure intensifying vessel 2 can be increased smoothly.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of a high-pressure container according to the present invention. 1... High pressure vessel main body, 2... Pressure intensifier vessel, 2a...
...hole, 4...stepped lid, 11...highly compressible substance.

Claims (1)

[Scope of Claims] 1. A cylindrical pressure intensifying vessel having an opening at one end is disposed within the high pressure vessel main body, and the opening hole of the pressure intensifying vessel has a pressure receiving area closer to the high pressure vessel main body than the pressure receiving area on the pressure intensifying vessel side. A high-pressure container characterized in that a stepped lid having a larger pressure-receiving area is fitted so as to be movable in the stepped direction. 2 A cylindrical pressure intensifying vessel having an opening at one end is disposed within the high pressure vessel main body, and the pressure receiving area on the high pressure vessel main body side is larger than the pressure receiving area on the pressure intensifying vessel side in the opening hole of the pressure intensifying vessel. In a high-pressure vessel in which a large stepped lid is inserted so as to be movable in the stepped direction, a pressure medium supplied into the pressure intensifying vessel is provided between a portion of the stepped lid having a large pressure-receiving area and the pressure intensifying vessel. A high-pressure container characterized by enclosing a highly compressible substance.