JP2002066301A - Solid state very high pressure generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-state very high pressure generator which eliminates the need for making a guide block and press frames larger than needed in spite of increasing of pressurizing force, is low in an equipment cost and is stable. SOLUTION: The upper frame 8 and the lower frame 9 are connected by four columns A and a press cylinder 7 is installed atop or within the lower frame 9. The upper guide block 1 is mounted at the under surface of the upper frame 8 and the lower guide block 2 is mounted at the top end of the press cylinder 7. Four sliding block 3 having pressure receiving slopes are arranged between the pressurizing slopes of the upper and lower guide blocks 1 and 2. Four guide block flank pressing cylinders 20 are disposed between the outer peripheral surface of the upper guide block 1 and the four columns A. Oil chambers 21 of the guide block flank pressing cylinders 20 are connected through a reducing valve 30 to a hydraulic source 7S of the press cylinder 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solid-state ultra-high pressure generator. More specifically, the present invention relates to an ultra-high pressure generator used for synthesizing diamond and cubic boron nitride and for testing the deformation characteristics of a substance under ultra-high pressure.

[0002]

2. Description of the Related Art The most typical conventional solid ultra-high pressure generator is an apparatus using a diamond type guide block. This diamond type ultra-high pressure generator will be described with reference to FIG. This pressure generating device comprises upper and lower guide blocks 1,
2. Lower anvil 4 fixed to the center of the lower surface of upper guide block 1, upper anvil 5 fixed to the center of the upper surface of lower guide block 2, and four pressurized inclined surfaces formed on upper and lower guide blocks 1 and 2. , Four sliding blocks 3 driven toward the center of the guide block, and four anvils 6 fixed to the front end face of the sliding block 3. Vertical guide block 1,
The two pressurized inclined surfaces and the four pressure-receiving inclined surfaces of the four sliding blocks 3 are arranged such that the distance of movement between the two anvils 6, 6 facing each other in the center direction is the distance between the upper and lower anvils 4, 5. The angle is set to be the same as the change. The space formed by the forward ends of the six anvils generally has a cubic shape, and a pressure medium for generating an extremely high pressure is set in this space. 7 is a press cylinder, 8 is an upper frame, and 9 is a lower frame.

In the conventional example, when an ultra-high pressure is to be generated, a pressure medium is placed on the lower anvil 5 and the press cylinder 7 is pressurized. Thereby, the upper and lower anvils 4,
The distance between the five is reduced. With this movement, the anvil 6 fixed to the four sliding blocks 3 moves forward with respect to the ultrahigh pressure generation space. Therefore, the cubic space composed of the six anvils 4, 5, 6 before pressurization similarly reduces its volume, thus generating an ultra-high pressure by reducing the volume of the initial pressure medium. Can be done.

By the way, in the pressurized state, the same force acts on the six anvils 4, 5, 6 in theory. The force acting on the anvil 6 fixed to the sliding block 3 acts on the guide blocks 1 and 2 via the sliding block 3, and this force causes the guide blocks 1 and 2 to move outwardly (at right angles to the pressing direction). In the direction of spreading. If the rigidity of the guide blocks 1 and 2 cannot be ensured so that the amount of deformation in the direction in which the guide blocks 1 and 2 are expanded is less than a certain limit value (roughly determined by the pressure and the volume of the high-pressure space), the space of the cube is changed It cannot be considered that it is decreasing in a similar manner, and the generation of an ultra-high pressure cannot be expected. Specifically, blowout occurs. In general, if the pressing capacity is about 10,000 KN or less, the relationship between the size of the press frame and the size of the guide blocks 1 and 2 does not matter so much. Since the amount of deformation allowed for the block is less than the limit value for the required generated pressure and volume, there has been no particular problem.

[0005]

However, there is an increasing demand for a press capacity of 10,000 KN or more in order to further increase the pressure and increase the capacity of the high-pressure space. The following problems need to be solved in order to exert their functions sufficiently even under a large capacity press load. (1) A feature of the diamond type guide block is that a force perpendicular to the pressing direction of the press acts on the guide block. The press can be designed to have sufficient rigidity against the force in the pressing direction, but the rigidity of the press in the direction perpendicular to the pressing direction needs to be ensured only by the rigidity of the guide block itself. (2) Even more problematic is, for example, if the pressure to be generated is the same and the volume is to be doubled,
The required press capacity is 1.58 times theoretically necessary,
Even if the stiffness of the guide block (in the direction perpendicular to the press pressing direction) is simply increased by 1.58 times, the possibility that the same pressure cannot be generated increases as the press capacity increases. is there. Basically, it is necessary to design so that the deformation amount of the guide block is the same regardless of the pressing ability. (3) Therefore, it is necessary to increase the steel properties and, consequently, the size of the press exponentially with the increase in the capacity of the press. (4) In this case, the size of the press, and hence its weight, increases exponentially with the UP of the capacity. (5) Furthermore, in special applications, it is necessary to place the entire equipment on the XYZ table and accurately adjust the position of the ultra-high pressure space to the position of the inspection device. In this case, the capacity of the XYZ table needs to be increased as the press weight increases. (6) In such a case, as the capacity of the press increases, the investment cost of the equipment further increases.

In view of the above circumstances, the present invention does not require the guide block and the press frame to be unnecessarily large even if the pressing force is increased. It is an object to provide a high-pressure generator.

[0007]

According to a first aspect of the present invention, there is provided a solid-state ultra-high pressure generator, wherein an upper frame and a lower frame are connected by four columns, and a press cylinder is provided on or above the lower frame. An upper guide block is attached to a lower surface of the upper frame, a lower guide block is attached to an upper end of the press cylinder, and four sliding blocks having a pressure receiving inclined surface are provided between the pressurized inclined surfaces of the upper and lower guide blocks. In the solid ultra-high pressure generator arranged, four guide block side pressing cylinders are provided between the outer peripheral surface of the upper guide block and the four columns. The solid ultra-high pressure generator according to claim 2, wherein the upper frame and the lower frame are connected by four columns, a press cylinder is installed on a lower surface or inside the upper frame, and an upper guide block is provided on a lower surface of the upper frame. Is attached, a lower guide block is attached to an upper end of the press cylinder, and four sliding blocks having a pressure receiving inclined surface are arranged between the pressurized inclined surfaces of the upper and lower guide blocks. And four guide block side pushing cylinders are provided between the outer peripheral surface of the lower guide block and the four columns. According to a third aspect of the present invention, in the invention of the first or second aspect, the guide block side pushing cylinder has an oil chamber connected to a hydraulic pressure source of the press cylinder via a pressure reducing valve. It is characterized by.

According to the first aspect of the present invention, when the guide block side pushing cylinder is protruded between the upper guide block and the column, it is possible to oppose the force for expanding the upper guide block. The amount of deformation (in the direction perpendicular to the pressing direction of the press) can theoretically be zero. Further, with this configuration, it is not necessary to increase the rigidity of the guide block.
Therefore, it is not necessary to increase the size of the press frame.
Further, even if the pressurizing capacity is increased, a stable ultra-high pressure can be generated. According to the second aspect of the present invention, when the guide block side pushing cylinder is protruded between the upper guide block and the column, it is possible to oppose the force for pushing and expanding the upper guide block. The amount of deformation (in the direction perpendicular to the pressing direction) can theoretically be zero. Further, with this configuration, it is not necessary to increase the rigidity of the guide block. Therefore, it is not necessary to increase the size of the press frame. Further, even if the pressurizing capacity is increased, a stable ultra-high pressure can be generated. According to the third aspect of the present invention, the pressurizing force of the guide block side pushing cylinder is reduced by using the same hydraulic pressure source as the press cylinder and introducing the pressurized oil to the guide block side pushing cylinder via the pressure reducing valve. Can be proportional to the applied pressure. For this reason, it is possible to obtain a pressure sufficient and sufficient to reduce the deformation of the guide block to zero, and it is possible to stably generate an ultra-high pressure even if the pressing capacity is increased.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the solid-state ultrahigh-pressure generator of the present embodiment. FIG. 2 is a sectional view taken along line II-II in FIG. As shown in the figure, the solid-state ultra-high pressure generator of the present embodiment has a main body 10 provided with four guide block side pushing cylinders 20.

First, the main body 10 will be described. Reference numerals 8 and 9 indicate an upper frame and a lower frame, respectively. The upper frame 8 and the lower frame 9 are connected by four columns A. A press cylinder 7 is provided on the upper surface of the lower frame 9. The press cylinder 7 may be installed not only on the upper surface of the lower frame 9 but also inside the lower frame 9. The upper guide block 1 is attached to the lower surface of the upper frame 8. The lower guide block 2 is attached to the upper end of the press cylinder 7. Four sliding blocks 3 each having a pressure receiving inclined surface are arranged between the pressure inclined surfaces of the upper guide block 1 and the lower guide block 2.

Next, the guide block side pushing cylinder 20 will be described. Outer peripheral surface of the upper guide block 1 and 4
Four guide block side pressing cylinders 20 are provided between the column and the column A. The guide block side pushing cylinder 20 includes a cylinder 22 and a piston rod 23.
And an oil chamber 21 is provided. The cylinder 22 is fixed to the column A. The piston rod 23 includes an upper guide block 1 and a lower guide block 2.
Opposing the outer periphery of. When the piston rod 23 is extended, the outer periphery of the upper guide block 1 can be pushed inward.

FIG. 3 is an enlarged view of FIG. FIG.
It is an IV-IV line arrow view. As shown in FIGS. 3 and 4, the oil chambers 21 of the four guide block side pushing cylinders 20 are all connected to a hydraulic pressure source 7 </ b> S of the press cylinder 7 via a pressure reducing valve 30.

Further, as another embodiment of the solid ultra-high pressure generator, the following configuration may be employed. That is,
In the solid-state extra-high pressure generator of the present embodiment, the press cylinder 7 is mounted on the upper surface or inside the lower frame 9, but the press cylinder 7 may be mounted on the lower surface or inside the upper frame 8. In this case, the lower guide block 2 is fixed and the upper guide block 1 is moved, and a guide block side pushing cylinder 20 is provided between the outer peripheral surface of the fixed guide block 2 and the four columns A. What is necessary is just to comprise so that the piston rod 23 may be extended and the outer periphery of the guide block 2 may be pushed inward.

Next, the operation and effects of the solid-state extra-high pressure generator of the present embodiment will be described. When the guide block side pushing cylinder 20 is made to protrude between the upper guide block 1 and the column A, it is possible to oppose the force for pushing and expanding the upper guide block 1. The amount of deformation (in the direction perpendicular to the direction) can theoretically be zero. Further, with this configuration, it is not necessary to increase the rigidity of the guide blocks 1 and 2 at all. Therefore, it is not necessary to increase the size of the press frames 8 and 9. Further, there is an effect that a stable ultra-high pressure can be generated even if the pressurizing capacity is increased.

A hydraulic source 7 common to the press cylinder 7
By using S to introduce pressure oil into the guide block side pushing cylinder 20 via the pressure reducing valve 30, the pressing force of the guide block side pushing cylinder 20 can be made proportional to the pressing force of the press cylinder 7. For this reason, it is possible to obtain a pressure sufficient and sufficient to reduce the deformation of the guide blocks 1 and 2 to zero, and it is possible to stably generate an ultra-high pressure even if the pressing capacity is increased.

As described above, according to the solid-state extra-high pressure generator of this embodiment, even if the pressing force is increased, neither the guide blocks 1 and 2 nor the press frames 8 and 9 need to be unnecessarily large, and the equipment cost is reduced. However, there is an effect that the super-high pressure can be stably generated at low cost.

[0017]

According to the solid ultra-high pressure generator of the first aspect, a stable ultra-high pressure can be generated even if the pressurizing capacity is increased. Further, it is not necessary to make the press frame larger than necessary. According to the solid-state extra-high pressure generating device of the second aspect, even if the pressurizing capacity is increased, it is possible to stably generate an extra-high pressure. Further, it is not necessary to make the press frame larger than necessary. According to the solid ultra-high pressure generating device of the third aspect, it is possible to obtain a sufficient and sufficient pressure to reduce the deformation of the guide block to zero, and to stably generate an ultra-high pressure even if the pressing capacity is increased. it can.

[Brief description of the drawings]

FIG. 1 is a front view of a solid-state ultra-high pressure generator according to an embodiment.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged view of FIG. 1;

FIG. 4 is a view taken in the direction of arrows IV-IV in FIG. 3;

FIG. 5 is a front view of a conventional solid ultra-high pressure generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper guide block 2 Lower guide block 3 Sliding block 4 Lower anvil 5 Upper anvil 6 Anvil 7 Press cylinder 7S Hydraulic power source 8 Upper frame 9 Lower frame A Column 10 Main body 20 Guide block side pushing cylinder 21 Oil chamber 30 Pressure reducing valve

Claims (3)

[Claims] 1. An upper frame and a lower frame are connected by four columns, a press cylinder is installed on an upper surface or inside the lower frame, and an upper guide block is mounted on a lower surface of the upper frame. In a solid ultra-high pressure generator in which a lower guide block is attached to an upper end of a cylinder and four sliding blocks having a pressure receiving inclined surface are arranged between pressurized inclined surfaces of the upper and lower guide blocks, A solid ultra-high pressure generator, wherein four guide block side pushing cylinders are provided between an outer peripheral surface and the four columns. 2. An upper frame and a lower frame are connected by four columns, a press cylinder is installed on a lower surface or inside the upper frame, and an upper guide block is mounted on a lower surface of the upper frame. A solid ultra-high pressure generator in which a lower guide block is attached to an upper end of a cylinder, and four sliding blocks each having a pressure-receiving inclined surface are arranged between pressurized inclined surfaces of the upper and lower guide blocks. A solid ultra-high pressure generator, wherein four guide block side pushing cylinders are provided between an outer peripheral surface and the four columns. 3. The guide block side pushing cylinder,
3. The solid ultra-high pressure generator according to claim 1, wherein the oil chamber is connected to a hydraulic pressure source of the press cylinder via a pressure reducing valve.