JPH07164194A - Piston type isotropic pressurizing device - Google Patents

Abstract

PURPOSE:To provide a piston type isotropic pressuring device which facilitates maintenance of a high-pressure packing, etc., and features excellent safety, stability, productivity and cost effectiveness. CONSTITUTION:This piston type isotropic pressuring device is constituted to insert a pressuring cylinder piston 13 into a pressure vessel 10 and to pressurize a work with an isotropic pressure via the compression of the fluid in this pressure vessel 10 and has a press frame 14 to carry the axial reaction according to the pressurization. The piston of the pressuring cylinder piston 13 consists of a movable piston 11 inserted freely movably in the axial direction of the vessel into the pressure vessel 10 and a pressuring piston 13A for pressuring this movable piston 11. Both pistons 11, 13A are so formed as to be freely attachable and detachable to and from each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piston type isotropic pressure pressurizing device, which is used for forming metal and ceramics, sterilizing foods and pharmaceuticals, and sterilizing them.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 5-50299 discloses an isotropic pressurizing device for forming fine powder such as ceramics and metal powder into a uniform and high density, and isotropic pressing for sterilizing foods. Japanese Patent Application Laid-Open No. 5-137550 discloses a pressure device, and the pressure cylinder piston in these is shown in FIG.
(A) and (B) and FIG. 6 (A) and (B).

FIGS. 5A and 5B and FIGS. 6A and 6B
In the above, the pressure vessel 1 has an opening 1A at one end and a lid 2 fitted at the other end via a high-pressure packing.
The pressure cylinder piston 3 is installed in the opening 1A at one end of the pressure vessel 1.
The pressurizing piston 4 is inserted through a high-pressure packing, and by compressing the fluid in the pressure vessel 1, the object to be processed can be pressurized with isotropic pressure.

The pressurizing cylinder piston 3 is shown in FIG.
It is fixed to the pressure vessel 1 via 5 and, in FIG. 6, is fixed to the press frame 6 that carries the axial reaction force due to the pressurization. Note that FIGS. 5A and 5B and FIGS. 6A and 6B
In (A), a pressurized state is shown, and (B) shows an unloaded state.

[0005]

In the prior art shown in FIG. 5, the pressure cylinder piston 3 which is a hydraulic system must be disassembled when the high pressure packing of the pressure piston 4 is maintained. Was extremely inconvenient. In the prior art of FIG. 6, it was difficult to align the pressurizing piston 4 and the opening 1A when changing from the unloaded state to the pressurized state.

Further, recently, there is an increasing need for appropriately exchanging a low pressure large diameter vessel and a high pressure small diameter vessel, but the prior art shown in FIGS. 5 and 6 can easily cope with them. I couldn't. Therefore, an object of the present invention is to provide a piston type isotropic pressure pressurizer which is easy to maintain such as a high-pressure packing and which is excellent in safety, stability, productivity and economy.

[0007]

According to the present invention, a pressurizing cylinder piston 13 is inserted into a pressure container 10 and an object to be processed is pressurized with isotropic pressure through compression of a fluid in the pressure container 10. In addition, in a piston type isotropic pressure pressurizing device equipped with a press frame 14 that carries an axial reaction force due to pressurization,
The following technical measures are taken to achieve the above-mentioned object.

That is, according to the first aspect of the present invention, the piston of the pressurizing cylinder piston 13 is a movable piston 11 which is inserted into the pressure container 10 so as to be movable in the container axial direction.
And a pressurizing piston 13A for pressurizing the movable piston 11, and both pistons 11 and 13A can be joined and separated. The present invention according to claim 2 is
The pressure cylinder piston 13 having the pressure piston 13A is
Pressure vessel with movable piston 11 inserted into pressure vessel 10
It is characterized in that it is provided in a press frame 14 that can be freely attached and detached to and from 10.

The present invention according to claim 3 relates to a container assembly 17 comprising a pressure container 10 and a movable piston 11 fitted therein.
Two or more sets of A and 17B are arranged, and the container assembly 17A and 17B
It is characterized in that one press frame 14 having a pressure cylinder piston 13 is detachably attached to B. The present invention according to claim 4 provides a container assembly.
17A and 17B are characterized by a combination of a low pressure large diameter and a high pressure small diameter.

[0010]

When the object to be processed in the pressure vessel 10 is pressurized by isotropic pressure through the compression of the fluid, the pressure cylinder piston 13
By pressing the pressure piston 13A of
This is done by compressing the movable piston 11 in the axial direction. Since both pistons 11 and 13A are separable from each other, the press frame can be installed with the movable piston 11 inserted into the pressure vessel 10.
Maintenance is facilitated by removing 14 and pulling out the movable piston 11.

Further, by arranging a plurality of container assemblies 17A, 17B consisting of the pressure container 10 and the movable piston 11, it is possible to perform pressure treatment with a large diameter at a low pressure and a small diameter at a high pressure.

[0012]

EXAMPLES Examples of the present invention used for pressure treatment of metal powders and ceramics powders, sterilization pressure treatment of foods, etc. will be described below with reference to the drawings. 1 (A) and 1 (B), a cylindrical pressure vessel 10 has a movable piston 11 axially movable fitted into one end thereof through a high pressure packing, and a lid 12 fitted into the other end thereof. Have been combined.

The pressurizing cylinder piston 13 is mounted on a press frame 14 which can be attached to and detached from the pressure container 10, and the pressurizing piston 13A can be joined and separated from the movable piston 11. The movable piston 11 is supported by the guide means 15 provided at one end of the pressure vessel 10, and the head 15A of the guide means 15 is detachable so that the plate
The piston 11 can be easily inserted and removed together with the 15B.

In FIG. 1, (A) is an unloaded state, (B) is a pressurized state, and the object to be processed is put in and taken out of the pressure vessel 10 through the loading / unloading of the lid 12. . Pressure piston of pressure cylinder piston 13 with the workpiece inside
When a pressure is applied to 13A, the movable piston 11 moves as shown in (B) to compress the fluid (liquid) and pressurize with isotropic pressure.

If the inner diameter of the pressure vessel 10 is 400 mm, 40
An oil pressure of about 5027 tons is required to generate 00 atm. When the pressure medium is water, the compressibility at 4000 atm is about 12.5%. Therefore, if the height of the container in the unloaded state is 1150 mm, then 1150 x
If the movable piston 11 is pushed in by 12.5 ≈ 144 mm, 40
It is possible to obtain 00 atm.

After the completion of the predetermined processing, the hydraulic circuit for the pressure cylinder piston 13 is switched to separate the pressure piston 13A from the movable piston 11 and return it to its original state. The movable piston 11 may be returned by its own weight, but may be positively returned by attaching an actuator to the plate 15B. Further, at the joint surface (opposing surface portion) between the pressure piston 13A and the movable piston 11, as shown in FIG.
As shown in (B), magnets 16A and 16B are embedded,
When the pressure piston 13A is returned, the movable piston 11 is magnetically joined and the movable piston 11 is accompanied with the pressure piston 13A. Even after the movable piston 11 is engaged with the head 15A, the pressure piston 13A is retained. By returning to the original state, the movable piston 11 can be separated in the returned state.

After unloading the processing chamber 10A in the pressure vessel 10, the press frame 14 is moved to remove it from the vessel 10 and the lid 12 is opened, so that the object to be treated can be taken out. The device shown in FIGS. 1A and 1B can be installed horizontally as shown in FIG. FIG. 2 shows another embodiment of the present invention, in which a plurality of container assemblies 17A, 17B composed of a pressure container 10, a lid 12 and a movable piston 11 are attached to a pedestal 18, and two sets are attached in the figure. One press frame 14 having a pressurizing cylinder piston 13 is detachably attached to the solid bodies 17A and 17B.

In the embodiment shown in FIG. 2, the container assembly 17
The productivity can be greatly improved by performing the work of putting in and out the object to be processed in the other container assembly 17B during the pressurizing process at A. FIG. 3 shows another embodiment of the present invention, which is a further development of the embodiment shown in FIG.

That is, a plurality of sets (two or more sets) of container assemblies 17A and 17B are used, one with a low pressure large diameter of 400 mφ and the other with 30.
By changing the type, such as the high pressure and small diameter of 0 mφ, it is possible to meet the needs. In both FIGS. 2 and 3, the press frame 14 is a dolly type and is detachable, but it may be a swivel type. Further, in the illustrated example, the container assemblies 17A and 17B are fixed, but it is also possible to fix the press frame 14 and move the container assemblies 17A and 17B alternately to this so as to be attachable.

In each of the above embodiments, the pressure vessel 10 and the movable piston 11 are a set, and the press frame 14 having the pressurizing cylinder piston 13 is relatively attachable thereto, so that the high pressure packing is provided. For maintenance such as, it can be easily carried out without having to tamper with the hydraulic system at all, and anyone can easily replace it without the need for centering.

[0021]

As described above in detail, according to the present invention, the maintenance of the high-pressure packing and the like can be easily performed without touching the hydraulic system, and the delicate centering adjustment between the pressure cylinder piston and the pressure container is unnecessary. It is possible to provide a piston type isotropic pressure pressurizer that not only achieves high productivity but also improves productivity and responds to needs.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, in which (A) is a vertical cross-sectional view during a pressure treatment and (B) is an unloaded state.

FIG. 2 is a vertical sectional view showing a second embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a third embodiment of the present invention.

FIG. 4 is a vertical sectional view showing a fourth embodiment of the present invention.

FIG. 5 shows a conventional example 1, in which (A) is a pressurization process,
(B) is each vertical sectional view at the time of no load.

FIG. 6 shows a conventional example 2, in which (A) is a pressurizing process,
(B) is each vertical sectional view at the time of no load.

[Explanation of symbols]

 10 Pressure Vessel 11 Movable Piston 13 Pressure Cylinder Piston 13A Pressure Piston 14 Press Frame 17A Vessel Assembly 17B Vessel Assembly

Claims (4)

[Claims] 1. A pressure cylinder piston (13) is attached to a pressure vessel (1).
(1) is pressed into the pressure vessel (10) through compression of the fluid in the pressure vessel (10) to apply isotropic pressure to the object to be processed, and a press frame (14) that carries an axial reaction force associated with the pressurization. In the piston type isotropic pressure pressurizing device, the piston of the pressurizing cylinder piston (13) is a pressure vessel.
The movable piston (11) is inserted into (10) so as to be movable in the container axial direction, and the pressure piston (13A) pressurizes the movable piston (11), and both pistons (11) and (13A) are A piston type isotropic pressure pressurizer characterized by being separable from the joint. 2. A pressurizing cylinder piston (13) having a pressurizing piston (13A) is a press which can be detachably attached to the pressure container (10) with the movable piston (11) being inserted into the pressure container (10). The piston type isotropic pressure pressurizing device according to claim 1, wherein the device is provided in the frame (14). 3. Two or more sets of container assemblies (17A), (17B) each consisting of a pressure container (10) and a movable piston (11) fitted therein are arranged, and the container assembly (17A) is arranged. , (17B) is equipped with one press frame (14) equipped with a pressure cylinder piston (13) in a detachable manner, The piston type isotropic method according to claim 1 or 2, Pressurizing device. 4. The piston type isotropic pressure pressurizing device according to claim 3, wherein the container assemblies (17A), (17B) are composed of a combination of a low pressure large diameter and a high pressure small diameter.