JP6511608B2 - Isostatic pressure device and pressure processing method using the same - Google Patents

Description

  The present invention relates to an isotropic pressure pressurizing apparatus for pressurizing an object to be treated contained in a pressure vessel with a liquid pressure medium, and a pressure treatment method using the same.

  An apparatus of this type is conventionally known, for example, in Patent Document 1 below. The prior art is configured as follows. Put the object with pressure medium such as water in the cylindrical pressure vessel whose lower end opening is closed by the lower lid, and push the piston from the upper end opening, and so on the object in the pressure vessel with pressure medium etc Pressurize with directional pressure. The device using a piston is called a piston direct pressure isotropic pressure device. There is also a device in which the upper end opening is replaced by a piston and closed by an upper lid, and a pressure medium is pushed into the pressure vessel from the outside to pressurize the processing object with isotropic pressure. It is called isotropic pressure pressurizing device. The objects to be treated include metal powder, ceramic powder, food and the like. By pressing metal powder and ceramic powder under isotropic pressure, a homogeneous (non-directional) compression molded article can be obtained.

Unexamined-Japanese-Patent No. 2010-94709

  However, the above-described apparatus for pressure-processing an object with isotropic pressure still has the following problems to be solved. Foreign matter is generated from the object in the process of pressure treatment. The foreign matter is roughly divided into those with small specific gravity and those with high specific gravity, and foreign matter with a relatively low specific gravity is not particularly problematic, but foreign matter with a high specific gravity is the seal portion of the pressure vessel or pressure booster (high pressure pump) , Damage to the pressure reducing valve etc. Therefore, it is necessary to make it hard to directly touch the apparatus which comprises an isotropic pressure pressurization apparatus, such as a pressure vessel, with the foreign material with large specific gravity. In the case of a metal powder, ceramic powder, etc. to be treated, the foreign matter produced is fragments or dust thereof, and when the food is a matter to be treated, the produced foreign matter is, for example, shell or moss (shell etc. In the case of food). Among the above-mentioned foreign substances, fragments of metal powder and ceramic powder and shells of shellfish are foreign substances having a high specific gravity, and dust and moss are foreign substances having a low specific gravity.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an isotropic pressure having a configuration capable of making it difficult to directly touch foreign matter generated from an object to be processed with a device such as a pressure vessel. It is providing a pressurization apparatus and a pressurization processing method using the same.

  The isostatic pressure device according to the present invention includes a cylindrical pressure vessel whose opening is disposed at both ends in the axial direction, and is disposed from the outside in the pressure vessel whose opening is closed. The first pressure medium of liquid is pushed in, or the first pressure medium of liquid placed in the pressure vessel is pressed by a piston inserted into the opening, and the object placed in the pressure vessel is An isotropic pressure pressurizing apparatus for pressurizing and treating a processing object, comprising: a bucket having a hole at an upper portion and accommodating the object to be processed and installed inside the pressure vessel; A second pressure medium is contained, and a specific gravity of the first pressure medium is smaller than a specific gravity of the object, and a specific gravity of the second pressure medium is equal to or more than a specific gravity of the first pressure medium.

  Further, a pressure treatment method according to the present invention is a pressure treatment method using the above-mentioned isotropic pressure pressurization apparatus, wherein the object to be treated and the second pressure medium are introduced into the bucket. An object storage step, a bucket storage step in which the bucket containing the object to be processed and the second pressure medium is put into the pressure vessel from the opening, and the pressure vessel in which the opening is closed By pushing the first pressure medium from the outside, or by pressing the first pressure medium placed in the pressure vessel with a piston inserted into the opening, into the pressure vessel together with the bucket A pressure treatment step of subjecting the placed object to be subjected to pressure treatment; a bucket taking out step of taking out the bucket containing the object to be treated subjected to pressure treatment from the pressure container; Said The treated product, characterized in that it comprises a treatment object extraction step of taking out of the bucket.

  According to the present invention, the first pressure medium having a specific gravity smaller than the specific gravity of the object to be treated is placed in the pressure vessel, and the second pressure medium having a specific gravity greater than the specific gravity of the first pressure medium is By accommodating the object to be treated together with the object to be treated and installing the bucket inside the pressure vessel, foreign matter generated from the object to be treated can be confined in the bucket, and as a result, the device such as a pressure vessel Can make it hard to touch foreign matter directly on the devices that make up the Thereby, it is possible to prevent the equipment such as the pressure vessel from being damaged by the foreign matter generated from the object to be treated.

It is a perspective view showing the isotropic pressure pressurization device concerning one embodiment of the present invention. 2A is a plan view of the bucket, and FIG. 2B is a cross-sectional view of FIG. 2A taken along line XX. It is a sectional view showing a bucket with a rotation device, and a total of three methods of pivoting (turning over) a bucket are illustrated as Drawing 3A, Drawing 3B, and Drawing 3C. FIG. 4A is a cross-sectional view showing a bucket filled with oysters and saltwater in a pressure vessel and fresh water is injected into the pressure vessel, and FIG. 4A shows a state where pressure is not applied in the pressure vessel. FIG. 4B shows the pressure vessel being pressurized. It is a figure which shows the modification of the bucket shown in FIG. 2, FIG. 5A is a top view of a bucket, FIG. 5B is YY sectional drawing of FIG. 5A.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the object to be treated is a shelled oyster (food), but the oyster is an example of the object to be treated, and the object to be treated is an oyster It is not limited to Foods other than oysters may be used, and inorganic substances (inorganic powders) such as metal powder and ceramic powder may be treated.

(Configuration of isotropic pressure pressurizing device)
The configuration of an isotropic pressure pressurizing apparatus 100 according to an embodiment of the present invention will be described based on FIG. An isotropic pressure pressurizing apparatus 100 according to an embodiment of the present invention controls a cylindrical pressure vessel 1, a press frame 2, a water supply and drainage unit 3 having a tank 3a, and a high pressure pump unit 4, which are disposed horizontally. The control board 5 is composed of a bucket 6 into which an oyster to be treated is placed. The bucket 6 is put into the pressure vessel 1 by the feed conveyor 7 and is taken out of the pressure vessel 1 by the discharge conveyor 8. Further, the pressure vessel 1 is moved by the slide device 9 between the inside of the press frame 2 and the side of the conveyors 7 and 8.

  Openings 1 a and 1 b provided at both axial ends of the pressure vessel 1 are closed by a first lid 10 and a second lid 11 attached to the press frame 2. As shown in FIG. 1, the second lid 11 has a large diameter portion 11 b (bowl portion) and a small diameter portion 11 a, and the small diameter portion 11 a is inserted in a closed manner into the opening 1 b of the pressure vessel 1. . The configuration of the first lid 10 is the same as that of the second lid 11, and the small diameter portion 10a of the first lid 10 is inserted into the opening 1a of the pressure vessel 1 in a sealed manner. With the openings 1a and 1b closed by the lids 10 and 11, fresh water as a first pressure medium stored in the tank 3a is pushed into the pressure vessel 1 by the high pressure pump unit 4 and An object to be treated (in the present embodiment, oyster O (see FIG. 4A)) is subjected to pressure treatment with isotropic pressure. That is, the isostatic pressure-applying device 100 is one of the external pressure-rising isotropic pressure-applying devices that press the first pressure medium from the outside into the pressure vessel and pressurize the object with isotropic pressure. It is. Fresh water from the high pressure pump unit 4 is pushed into the pressure vessel 1 from an injection passage (not shown) formed in the first lid 10, for example.

  In addition, a piston direct pressure type isotropic pressure pressurizing device may be used. In this case, for example, the second lid 11 is a piston. The length of the small diameter portion 11 a of the second lid 11 is determined by design. In a state where the opening 1a is closed by the first lid 10, the piston (small diameter portion 11a of the second lid 11) is pushed from the other opening 11b with a hydraulic cylinder (not shown) or the like. The object to be treated is pressurized with a pressure medium under isotropic pressure.

  The bucket 6 will be described. As shown in FIGS. 2A and 2B, the bucket 6 has a cylindrical bucket body 12 closed at both axial ends and an open top, and a cross-sectional arc shape attached to the top of the bucket body 12 via a hinge 14 And the lid 13 of the The lid 13 is provided with a plurality of holes 13a. A bucket 18 according to a modification of the bucket 6 is shown in FIGS. 5A and 5B. As shown in FIGS. 5A and 5B, the lid 19 having the plurality of holes 19a has a flat plate shape. Thus, instead of the lid 13 having a circular arc shape in cross section, a flat plate lid may be used. Also, the lid 19 is not attached to the bucket body 12 via a hinge, but is merely placed on the bucket body 12. As described above, the lid 19 may be detachably attached to the upper portion of the bucket body 12.

  The roller 15 shown in FIG. 3A is disposed downstream of the discharge conveyor 8. The bucket 6 taken out of the pressure vessel 1 by the discharge conveyor 8 is carried by the discharge conveyor 8 and placed on the pair of left and right rollers 15 as shown in FIG. 3A (state shown in FIG. 3A) . In this state, the bucket 6 is rotated 180 degrees around its axis mechanically (with power) or manually. Then, as shown on the right in FIG. 3A, the lid 13 rotates around the hinge 14 by its own weight and opens. The roller 15 is an example of a rotating device for rotating the bucket 6 taken out of the pressure vessel 1.

  Other methods (devices) for rotating the bucket 6 are shown in FIGS. 3B and 3C. The rotating device 16 shown in FIG. 3B has a cylindrical bucket holding body 16a having a diameter larger than that of the bucket main body 12 and opened at the top by the dimension of the lid 13 of the bucket 6, and the outer surface of the bucket holding body 16a. It is comprised with the fixed rotation fulcrum member 16b. The rotation fulcrum member 16b is fixed to a stationary object that does not move. Similar to the roller 15 described above, the rotating device 16 is disposed downstream of the discharge conveyor 8 (the same applies to the rotating device 17 shown in FIG. 3C).

  The bucket 6 taken out of the pressure vessel 1 by the discharge conveyor 8 is put into the bucket holder 16a (left state in FIG. 3B). In this state, the bucket holder 16a is rotated 180 degrees around the rotation fulcrum member 16b mechanically (with power) or manually. Then, the lid 13 rotates about the hinge 14 by its own weight and opens (right state in FIG. 3B). The bucket body 12 and the bucket holder 16a do not move relatively largely due to the contact frictional force. The bucket body 12 and the bucket holder 16a may be temporarily connected to each other so that the bucket body 12 does not move with respect to the bucket holder 16a.

  Next, the rotating device 17 shown in FIG. 3C is disposed between the bucket holder 17a and the bucket body 12 and a pair of bucket holders 17a having a circular arc shape in cross section whose diameter is slightly larger than the bucket body 12 It comprises a plurality of rollers 17b. The pair of bucket holders 17a is fixed to a stationary object that does not move.

  The bucket 6 taken out of the pressure vessel 1 by the discharge conveyor 8 is put into the rotating device 17 (left state in FIG. 3C). In this state, the bucket 6 is rotated 180 degrees around its axis mechanically (with power) or manually. Then, as shown on the right in FIG. 3C, the lid 13 rotates around the hinge 14 by its own weight and opens.

(Pressure treatment method of oyster using isotropic pressure pressurization device)
With reference to FIG. 1, FIG. 4A, FIG. 4B etc., the pressurization processing method of the oyster O using the isotropic pressure pressurization apparatus 100 is demonstrated.

  The lid 13 of the bucket 6 is opened, and oyster O is put into the bucket body 12 as salt water (salt water has a specific gravity greater than that of fresh water) as a second pressure medium. At this time, a sufficient amount of salt water is put into the bucket body 12 so that the oyster O is completely submerged in the salt water (workpiece accommodation step). For example, seawater is used as the salt water, but it is not limited to seawater.

  The bucket 6 containing oyster O and salt water is put into the pressure vessel 1 through the opening 1a of the pressure vessel 1 (bucket storing step). Then, the pressure vessel 1 is slid in the direction of the press frame 2 and the first lid 10 and the second lid 11 are moved by a hydraulic cylinder (not shown) or the like to open the openings 1a and 1b of the pressure vessel 1 as the first lid. 10 and the second lid 11 are closed respectively.

  Then, the water supply and drainage unit 3 is operated to pour fresh water 51 into the pressure vessel 1. A state in which fresh water 51 is injected into the pressure vessel 1 is shown in FIG. 4A. The saltwater 52 is kept contained in the bucket 6 because it has a specific gravity greater than that of fresh water, so the oyster O remains immersed in the saltwater 52 in the bucket 6. Then, the high pressure pump unit 4 is operated to push fresh water 51 into the pressure vessel 1 and pressurize the oyster O with isotropic pressure for a predetermined time (pressure treatment step). This state is shown in FIG. 4B. Since the inside and the outside of the bucket 6 communicate with each other through the holes 13a, the pressure reliably acts on the oyster O.

  When the pressure treatment is completed, the lids 10 and 11 are removed by retracting the first lid 10 and the second lid 11 with respect to the pressure vessel 1, and the pressure vessel 1 is slid to the conveyor side. Then, the bucket 6 containing the pressurized oyster O is taken out of the pressure vessel 1 (bucket taking out step).

  The bucket 6 is placed on the pair of left and right rollers 15 (see FIG. 3A) by the discharge conveyor 8. Then, the bucket 6 is turned over by rotating the bucket 6 about its axis by 180 degrees mechanically (with power) or manually. Then, as shown on the right in FIG. 3A, the lid 13 rotates around the hinge 14 by its own weight and opens. As a result, the pressurized oyster O is dropped out of the bucket body 12 together with the salt water 52 and taken out (object removal step).

  As a result of the above-mentioned pressure treatment, oyster O is subjected to sterilization of pathogens and inactivation of virus, and its shell is easily peeled off. Further, since the salt water 52 as the second pressure medium is kept accommodated in the bucket 6, the salt water 52 is in contact with the inner surface of the pressure vessel 1, an apparatus such as a pump constituting the high pressure pump unit 4 Because the salt contained in the salt water 52 can prevent the corrosion of these devices. Further, since the oyster O is stored in the bucket 6, the peeled shells are also stored in the bucket 6. Therefore, it is possible to prevent the shell of the oyster O from coming into direct contact with the pressure vessel or mixing with equipment such as a pump constituting the high pressure pump unit 4.

(Modification)
In the above embodiment, fresh water is used as the first pressure medium, and salt water having a specific gravity larger than that of fresh water is used as the second pressure medium, that is, a pressure having a specific gravity larger than the specific gravity of the first pressure medium as the second pressure medium. Although an example using a medium is shown, the specific gravity of the second pressure medium may be the same as the specific gravity of the first pressure medium. As described with reference to FIG. 4A, when the specific gravity of the second pressure medium is smaller than the specific gravity of the first pressure medium, the second pressure medium may come out of the bucket 6 from the hole 13a of the bucket 6 It is conceivable that, if the specific gravity of the first pressure medium and the specific gravity of the second pressure medium are the same, the second pressure medium placed in the bucket 6 is a bucket in the process of pressure treatment by the first pressure medium. It is because it is not easy to go out of 6. The fact that the second pressure medium does not easily come out of the bucket 6 means that foreign matter from the object to be treated is also difficult to come out of the bucket 6.

  Moreover, in the above-mentioned embodiment, although salt water (water containing salt content) is used as a 2nd pressure medium, you may use the permeation liquid of specific gravity more than the specific gravity of fresh water. In addition, if you want to adjust the salt content of oyster O, you may use salt water with adjusted salt content, and if you want to fragrant oyster O, add a perfume with a specific gravity greater than that of fresh water You may use water (water containing a fragrance). Moreover, although cheap fresh water is suitable as the first pressure medium, ozone-sterilized water may be used instead of simple fresh water.

  Although putting salt water into the bucket 6 is based on manual operation (man's operation), salt water may be automatically introduced into the bucket 6 instead of human power. In this case, the control board 5 described above controls the injection of salt water into the bucket 6. That is, the control board 5 may have a function of controlling the injection timing of salt water into the bucket 6 and the injection amount thereof.

(Action / effect)
According to the isotropic pressure pressurizing apparatus and the pressurizing processing method using the same according to the present invention, the first pressure having a specific gravity smaller than the specific gravity of the object to be treated is used instead of using only one kind of liquid as the pressure medium. A medium and two pressure media such as a second pressure medium which is a liquid having a specific gravity equal to or higher than the specific gravity of the first pressure medium, the first pressure medium is placed in a pressure vessel, and a hole is formed at the top The second pressure medium is accommodated together with the object to be treated in a bucket having the above, and the bucket is installed inside the pressure vessel. When the specific gravity of the first pressure medium is smaller than the specific gravity of the object to be treated, the object to be treated and foreign matter generated therefrom are unlikely to come out of the bucket. Also, by setting the specific gravity of the second pressure medium to be equal to or greater than the specific gravity of the first pressure medium, the object to be treated and foreign matter generated therefrom are unlikely to come out of the bucket. Therefore, the foreign matter generated from the object to be treated can be confined in the bucket, and the foreign matter can be made difficult to directly touch the device constituting the device such as the pressure vessel. Thereby, it is possible to prevent equipment such as a pressure vessel from being damaged by foreign matter generated from the object to be treated.

  Moreover, since the to-be-processed object is put in a pressure vessel in the state put in the bucket instead of putting a to-be-processed object in a pressure vessel directly, it is excellent in the handling property of a to-be-processed object. Further, when the object to be treated is a food, the pressure medium (second pressure medium) in the bucket can be easily discharged every time the food pressure treatment is performed, which is excellent in terms of hygiene.

  Here, with respect to the bucket, the bucket includes a bucket body in which the object to be treated and the second pressure medium are placed, and a lid having a hole attached to the top of the bucket body via a hinge or detachably. And, preferably, the isostatic pressing device is provided with a rotating device for pivoting the bucket taken out of the pressure vessel. According to this, it is possible to easily take out the pressure-treated object from the pressure vessel.

  When the material to be treated is a food, it is preferable to use water containing salt or flavor as the second pressure medium. By using water containing salt or water having a scent as the second pressure medium, it is possible to give the food a flavor or smell with a salinity, and to improve the commercial value of the food. Also, in this case, it is conceivable that if the pressure medium contains salt and the like, the durability of the device constituting the iso-pressure pressurizing device such as the pressure vessel, high pressure pump, and pressure reducing valve may be reduced. According to the second pressure medium, it is difficult for the second pressure medium to move out of the bucket.

  Although the embodiments of the present invention and the modifications thereof have been described above, it goes without saying that various modifications can be made as long as those skilled in the art can conceive.

1: Pressure vessel 1a, 1b: Opening 2: Press frame 3: Water supply and drainage unit 4: High pressure pump unit 5: Control board 6: Bucket 10: First lid 11: Second lid 12: Bucket body 13: Lid 13a: Hole 14: hinge 15: roller (rotation device)
51: Fresh water (pressure medium)
52: Salt water (second pressure medium)
100: Isostatic pressure device O: Oyster (food)

Claims (6)

A first pressure medium of liquid is externally pushed into the pressure vessel whose opening is provided at the both axial ends at the transversely disposed cylindrical pressure vessel and the opening is closed, or The first pressure medium of the liquid contained in the pressure vessel is pressed by a piston inserted into the opening, and isostatic pressing is performed to pressurize the object placed in the pressure vessel. A device,
It has a hole in the upper part and is provided with a bucket that accommodates the object to be treated and is installed inside the pressure vessel,
At least a second pressure medium is contained in the bucket,
The specific gravity of the first pressure medium is smaller than the specific gravity of the object to be treated,
The isotropic pressure pressurizing apparatus, wherein a specific gravity of the second pressure medium is equal to or more than a specific gravity of the first pressure medium. In the isotropic pressure pressurizing apparatus according to claim 1,
The bucket is
A bucket body into which the object to be treated and the second pressure medium are placed;
A lid having the hole attached to the upper portion of the bucket body via a hinge or releasably;
Equipped with
An isostatic pressure-applying device, further comprising a rotating device for axially rotating the bucket taken out of the pressure vessel. In the isotropic pressure pressurizing apparatus according to claim 1 or 2,
An isotropic pressure pressurizing apparatus characterized in that the second pressure medium is water containing salt or flavor and the object to be treated is a food. In the isotropic pressure pressurizing apparatus according to claim 3,
An isostatic pressure device, wherein the object to be treated is a shelled food. It is a pressurization processing method using the isotropic pressure pressurization device according to claim 1,
An object storage step of placing the object and the second pressure medium into the bucket;
A bucket storing step of putting the bucket containing the object to be treated and the second pressure medium into the pressure vessel from the opening;
The first pressure medium is externally pushed into the pressure vessel in which the opening is closed, or the first pressure medium contained in the pressure vessel is pressed by a piston inserted in the opening. A pressure treatment step of subjecting the object to be treated, which is placed in the pressure vessel together with the bucket,
Removing the bucket containing the pressure-treated object from the pressure vessel;
An object removing step of removing the pressurized object from the bucket;
A pressure treatment method using an isotropic pressure pressurization device, comprising: It is a pressurization processing method using the isotropic pressure pressurization device according to claim 5,
In the processing object removal step, the bucket is turned by pivoting the bucket, and the lid having the hole attached to the upper part of the bucket main body of the bucket via the hinge is rotated about the hinge by its own weight. A pressure treatment method using an isostatic pressure device, wherein the object to be treated subjected to pressure treatment is dropped from the bucket and taken out.

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