Pressure vessel

Abstract

To provide a technique related to a pressure vessel capable of preventing a deterioration of accuracy when measuring a pressure wave discharged from a compression device of a pyrotechnic type.SOLUTION: A pressure vessel includes: a pressure chamber defined by a metallic internal surface and capable of accommodating a specimen; a compression device of a pyrotechnic type including an explosive container made of metal and accommodating an explosive, configured to execute an ignition control of an explosive through receiving a supply of actuation electric power, and discharge a pressure wave to the pressure chamber; a pressure sensor configured to measure the pressure wave discharged from the compression device; and an insulation structure configured to maintain an insulation state between the metallic internal surface and a cleavage piece of the explosive container configured to cleave by a combustion energy of the explosive accompanying the ignition control of the explosive.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a pressure vessel. [Background technology]

[0002] A known pressure vessel is equipped with a pyrotechnic pressure device that generates pressure waves (including shock waves) and is capable of pressurizing a sample contained in a pressure chamber by the pressure waves generated by the pressure device (see, for example, Patent Document 1). The pyrotechnic pressure device includes an explosive container that contains explosives, and controls the ignition of the explosives by receiving operating power from a power source. When the pressure device is activated, the explosive container is ruptured by the combustion energy of the explosives, and a pressure wave generated by the combustion gas is released into the pressure chamber. Then, by exposing the sample contained in the pressure chamber to the pressure waves, the sample can be pressurized according to the purpose. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2021 / 085491 Summary of the Invention [Problem to be solved by the invention]

[0004] In the pressurization of samples using a pressure vessel, it is important to accurately measure the magnitude of the pressure applied to the sample by a pyrotechnic pressurization device in order to accurately understand the effects on the sample. However, when the pyrotechnic pressurization device is activated and the explosive container is split open, there is a risk that the split fragments may physically come into contact with the metal inner wall surface that forms the inner wall surface of the pressure chamber. In this case, the operating current supplied to the pressurization device may flow through the split fragments of the explosive container and the metal inner wall surface, which may introduce disturbances (noise) into the measurement signal of the pressure sensor that measures the pressure wave emitted from the pressurization device.

[0005] The technology disclosed herein has been made in consideration of the above-mentioned circumstances, and aims to provide technology related to a pressure vessel that can suppress a decrease in accuracy when measuring pressure waves emitted from a pyrotechnic pressurizing device. [Means for solving the problem]

[0006] The present disclosure solves the above problems in the following aspects. That is, the technology according to the present disclosure is a pressure chamber defined by a metal inner wall surface and capable of accommodating a sample; a pyrotechnic pressurizing device having a metal explosive container for accommodating explosives, and receiving a supply of operating power to control ignition of the explosives and release a pressure wave into the pressure chamber; a pressure sensor for measuring pressure waves emitted from the pressure device; an insulating structure for maintaining an insulating state between the metal inner wall surface and the cleavage pieces of the explosive container that are cleaved by the combustion energy of the explosive associated with the ignition control of the explosive; A pressure vessel comprising:

[0007] Here, the explosive container peripheral portion protrudes toward the pressure chamber side compared to the container peripheral portion of the metal inner wall surface located around the explosive container, The insulating structure may include a stepped structure in which the cleavable surface of the explosive container is stepped relative to the peripheral portion of the container on the metal inner wall surface.

[0008] The metal inner wall surface may have an inner recess formed thereon that is recessed compared to other portions, and the explosive container may be positioned in the inner recess.

[0009] In addition, at least one of the peripheral portion of the metal inner wall surface located around the explosive container and the outer surface of the cleavage surface of the explosive container may be covered with an insulating material. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to provide a technology relating to a pressure vessel that can suppress a decrease in accuracy when measuring pressure waves emitted from a pyrotechnic pressurizing device. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram illustrating the schematic configuration of a pressure vessel. [Figure 2] FIG. 2 is a diagram illustrating the schematic configuration of the pressure vessel. [Figure 3] FIG. 3 is a diagram illustrating the insulating structure of the pressure vessel. [Figure 4] FIG. 4 is a diagram illustrating the state after the cleavage surface of the explosive container is cleaved in accordance with the activation of the initiator. [Figure 5] FIG. 5 is a graph showing the measurement results of pressure profiles during pressure treatment in the embodiment and the comparative example. [Figure 6] FIG. 6 is a diagram illustrating an insulating structure according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0012] A pressure vessel according to an embodiment of the present disclosure will be described below with reference to the drawings. Note that each configuration and combination thereof in the embodiment is merely an example, and addition, omission, substitution, and other modifications of the configuration are possible as appropriate within the scope of the gist of the present disclosure. The present disclosure is not limited by the embodiment, but is limited only by the claims.

[0013] The pressure vessel according to this embodiment can accommodate a sample in a pressure chamber formed inside, and is equipped with a pyrotechnic pressurizing device. The pressure vessel activates the pressurizing device when performing a pressurizing process in which high pressure is applied to the sample accommodated in the pressure chamber. The pressurizing device receives a supply of operating power to control the ignition of explosives, thereby generating a pressure wave (shock wave) and releasing it into the pressure chamber. As a result, the pressure wave (shock wave) can be applied to the sample accommodated in the pressure chamber.

[0014] The sample contained in the pressure chamber of the pressure vessel, i.e., the sample to be pressurized by the pressure vessel, is not particularly limited. Furthermore, the pressure chamber of the pressure vessel may contain (or be filled with) a medium (pressure wave transmission medium) for facilitating the transmission of pressure waves to the sample, in addition to the sample, but the presence of the pressure wave transmission medium is optional. The pressure wave transmission medium may be, for example, a liquid, but is not particularly limited.

[0015] <Embodiment> Figure 1 is a diagram illustrating the schematic configuration of a pressure vessel 1 according to an embodiment. The pressure vessel 1 is a metal vessel comprising a vessel body 2 and a lid 3 that is detachable from the vessel body 2. Inside the pressure vessel 1, a hollow pressure chamber 8 capable of containing a sample is formed.

[0016] The container body 2 is, for example, a metal container having a roughly cylindrical outer shape, and has, for example, a cylindrical side wall portion 21 and a bottom wall portion 22 provided in the middle portion of the side wall portion 21 in the vertical direction. However, the shape of the container body 2 is not particularly limited. An upper end opening 23 is formed on the upper end side of the container body 2 as an open end. A lid portion 3 can be detachably attached to the upper end opening 23 of the container body 2.

[0017] FIG. 2 shows the lid 3 attached to the upper opening 23 of the container body 2. With the lid 3 attached to the upper opening 23 of the container body 2, the pressure chamber 8 of the pressure vessel 1 is sealed airtight and liquidtight. Here, the inner surfaces of the side wall 21 and bottom wall 22 of the container body 2 facing the pressure chamber 8 are referred to as the "side inner surface 24" and the "bottom inner surface 25," respectively. Furthermore, the inner surface of the lid 3 facing the pressure chamber 8 when the lid 3 is attached to the container body 2 is referred to as the "lid inner surface 26." In this embodiment, the side inner surface 24 and the bottom inner surface 25 of the container body 2 and the lid inner surface 26 of the lid 3 are formed as metallic inner wall surfaces and correspond to the "metallic inner wall surfaces" that define the pressure chamber 8. The spatial shape of the pressure chamber 8 is not particularly limited, but as an example, it is formed as a cylindrical space. Reference symbol X1 in FIG. 2 indicates the axis of the pressure chamber 8. In the following description, for convenience, the direction of the axis X1 of the pressure chamber 8 may be referred to as the depth direction (vertical direction) of the pressure chamber 8, and the direction perpendicular to the axis X1 may be referred to as the cross-sectional direction of the pressure chamber 8.

[0018] The pressure vessel 1 includes an initiator 4 as a (pyrotechnic) pressurizing device. The initiator 4 is, for example, an electric igniter including a cup-shaped explosive container 41 for containing explosive, a pair of conductive pins 42, and the like. In one embodiment, the initiator 4 is provided in the lid 3 of the pressure vessel 1. When the lid 3 is attached to the vessel body 2, the explosive container 41 in the initiator 4 is disposed facing the pressure chamber 8 so as to face the pressure chamber 8, as shown in FIG. 2 . The explosive container 41 includes, for example, a side surface 41A that forms a side portion of the explosive container 41 and a cleavage surface 41B that forms the bottom of the explosive container 41. The side surface 41A of the explosive container 41 has, for example, a cylindrical shape and extends along the axis X1 direction (depth direction) of the pressure chamber 8. The cleavage surface 41B is connected to the bottom end of the side surface 41A and extends along the cross-sectional direction (direction perpendicular to the axis X1) of the pressure chamber 8. The bottom end of the side surface 41A is the end located on the bottom side of the pressure chamber 8.

[0019] An ignition current for igniting the explosive contained in the explosive container 41 is supplied to a pair of conductive pins 42 in the initiator 4. The base ends of the pair of conductive pins 42 are inserted into the explosive container 41 while being maintained in an electrically insulated state, and a bridge wire (resistor) (not shown) is connected between the base ends of the pair of conductive pins 42. The bridge wire may be, for example, a nichrome wire. The explosive may be ZPP (zirconium-potassium perchlorate), ZWPP (zirconium-tungsten-perchlorate), or the like. Alternatively, the explosive may be titanium hydride-potassium perchlorate (THPP), lead tricinate, or the like. The explosive is contained in the explosive container 41 in contact with the bridge wire. The explosive container 41 is formed of a thin-walled metal member such as aluminum.

[0020] When the initiator 4 is activated, the bridge wire is heated by an operating current (ignition current) supplied to the pair of conductive pins 42. As a result, the explosive in the explosive container 41 is ignited and burns. Then, as the explosive contained in the explosive container 41 burns, the pressure inside the explosive container 41 increases, and the cleavage surface 41B of the explosive container 41 cleaves. The cleavage surface 41B is disposed opposite the pressure chamber 8 when the lid 3 is attached to the container body 2. The cleavage surface 41B of the explosive container 41 is configured to be cleaved more easily by the combustion energy of the explosive than the side surface 41A. In other words, the cleavage surface 41B of the explosive container 41 can be said to be a surface configured to be cleaved by the combustion energy of the explosive when the initiator 4 is activated. For example, an easy-to-crack portion is formed on the cleavage surface 41B of the explosive container 41, the metal member having a thinner wall thickness than other portions, so that the cleavage surface 41B is easily cleaved by the combustion energy of the explosive when the initiator 4 is activated. The easy-to-crack portion may be formed, for example, by performing a thinning process such as half-cutting on the metal member that forms the cleavage surface 41B.

[0021] When the cleavage surface 41B of the explosive container 41 is cleaved by the combustion energy of the explosive, combustion products (combustion gas of the explosive) are released from the cleavage site as a pressure wave (shock wave) into the pressure chamber 8. In this way, the initiator 4 controls the ignition of the explosive contained in the explosive container 41 by receiving a supply of operating power, and releases the pressure wave (shock wave) generated by the ignition control into the pressure chamber 8.

[0022] Reference numeral 5 in FIG. 2 denotes a sample to be subjected to pressure treatment using the pressure vessel 1. The sample 5 is placed in the pressure chamber 8 of the pressure vessel. The sample 5 is not particularly limited. The sample 5 may be a solid, a liquid, or a mixture thereof. In this embodiment, a cell-containing solution is used as the sample 5, as an example. As shown in FIG. 2, the sample 5 is placed in the pressure chamber 8 while being accommodated in a sample container 50. The type of the sample container 50 is not particularly limited, but it is preferably made of a material that can smoothly transmit the pressure wave (shock wave) released into the pressure chamber 8 upon activation of the initiator 4 to the sample 5 and that will not burst when exposed to the pressure wave (shock wave). The sample container 50 may be, for example, a pouch with appropriate flexibility. The pressure chamber 8 may be formed with a mounting portion for mounting the sample container 50 in a fixed position. The mounting portion may be configured to allow the sample container 50 to be placed in a predetermined orientation, for example. For example, an installation portion may be formed near the center of the bottom inner surface 25 of the bottom wall portion 22 of the container body 2, and the sample container 50 may be installed in this installation portion.

[0023] Reference numeral 7 denotes a medium (pressure wave transmission medium) filled in the pressure chamber 8 of the pressure vessel 1. The pressure wave transmission medium 7 is a medium for transmitting the pressure waves (shock waves) emitted from the initiator 4 to the pressure chamber 8 to the sample 5. When the initiator 4 is activated, transmission of the pressure waves (shock waves) to the sample 5 is promoted via the pressure wave transmission medium 7. The pressure wave transmission medium 7 is not particularly limited, but is, for example, a liquid medium. The type of liquid medium is not particularly limited, and examples include water, aqueous solutions, organic solvents, ionic liquids, and gel-like liquids. These liquid solvents may be used alone or in combination of two or more. Of these, water or liquids having a bulk modulus similar to that of water are preferred, and water is particularly preferred.

[0024] Reference numeral 6 denotes a pressure release valve. The pressure release valve 6 is configured to receive operating power from, for example, a power source (not shown) and is controlled by receiving the operating power. The pressure release valve 6 is closed when the initiator 4 of the pressure vessel 1 is activated, and its operation may be controlled by programming so that it opens when a predetermined time has elapsed after the initiator 4 starts operating. Furthermore, for example, the pressure release valve 6 may be automatically opened when the pressure in the pressure chamber 8 rises to a predetermined pressure during operation of the initiator 4. There are no particular limitations on the location where the pressure release valve 6 is installed, but in the embodiment shown in FIG. 2 , the pressure release valve 6 is provided on the side wall portion 21 of the vessel body 2.

[0025] Reference numeral 9 denotes a pressure sensor. The pressure sensor 9 is a sensor for measuring the pressure wave (shock wave) emitted from the initiator 4 to the pressure chamber 8 when the initiator 4 is activated, in other words, the pressure profile of the pressure wave to which the sample 5 will be exposed. The pressure sensor 9 is, for example, a piezoelectric sensor having a piezoelectric element. The piezoelectric element of the pressure sensor 9 is disposed, for example, facing the inside of the pressure chamber 8 or in communication with the pressure chamber 8, and is disposed so as to be exposed to the pressure wave (shock wave) emitted from the initiator 4. There are no particular limitations on the location where the pressure sensor 9 is installed, but in the embodiment shown in FIG. 2, the pressure sensor 9 is installed on the bottom wall portion 22 of the container body 2.

[0026] The pressure vessel 1 configured as above is a pressure vessel that generates a pressure wave (impact The pressure chamber 8 is put into a high-pressure state by the shock wave. The pressure vessel 1 is designed so that the lid 3 can be fastened integrally to the vessel body 2 so that the pressure chamber 8 can be kept airtight even when the initiator 4 is activated. For example, a gasket may be interposed between the lid 3 and the vessel body 2 to improve the airtightness of the pressure chamber 8. The lid 3 and the vessel body 2 may also be fastened together with high-strength bolts.

[0027] Next, the procedure and operation of using the pressure vessel 1 will be described. In preparation for pressurizing the sample 5, first, as shown in FIG. 1, the lid 3 is removed from the vessel body 2 of the pressure vessel 1, and the sample 5 is placed in the pressure chamber 8. For example, a sample container 50 containing the sample 5 is placed on the installation section of the pressure chamber 8. Then, the pressure chamber 8 is filled with a pressure wave transmission medium 7 (for example, water). As described above, it is optional whether or not to fill the pressure chamber 8 with the pressure wave transmission medium 7.

[0028] Thereafter, the lid 3 is attached and fastened to the vessel body 2, making the pressure chamber 8 airtight. The initiator 4, pressure release valve 6, etc. are connected to a power source via wiring. The supply of operating power from the power source to the initiator 4 and pressure release valve 6 is controlled by a control device. The control device is not particularly limited, but may be, for example, a general-purpose computer equipped with an input section, a processing section, an output section, etc. When the sample 5 is pressurized using the pressure vessel 1, a pressure sensor 9 measures the pressure profile (pressure waveform) of the pressure wave to which the sample 5 is exposed during the pressurization process. The pressure sensor 9 is connected to the input section of the control device via wiring, etc., and the control device can acquire the output signal of the pressure sensor 9.

[0029] When the initiator 4 receives the supply of operating current, it controls the ignition of the explosive contained in the explosive container 41. Then, as described above, the combustion energy of the explosive causes the cleavage surface 41B of the explosive container 41 to cleave, and a pressure wave is released into the pressure chamber 8. The pressure wave released into the pressure chamber 8 propagates through the pressure wave transmission medium 7, and the sample 5 contained in the sample container 50 is pressurized. Here, since the sample container 50 has an appropriate degree of flexibility (flexibility), the sample container 50 can be pressurized without bursting.

[0030] The sample 5 is, for example, a solution containing cells. As an example, the pressure vessel 1 can be used to partially damage the surface of the cells contained in the sample 5 without crushing them. In this way, by applying pressure to the cells, a desired cell processed product can be obtained. The pressure treatment may be performed, for example, so that the pressure profile of the pressure wave applied to the sample 5 includes the following conditions (1) to (3). (1) The maximum pressure is 37 MPa or more and 500 MPa or less; (2) The time from the start of pressure rise to the time when the maximum value is reached is 0.5 ms or less, and (3) The time from when the pressure starts to decay from the maximum value to when the pressure decays to half of the maximum value is 5 ms or less.

[0031] A pressure wave having the pressure profile specified as above can be generated by adjusting the type, amount, characteristics, etc. of the explosive contained in the explosive container 41 of the initiator 4, or by adjusting the valve opening timing, opening degree, etc. of the pressure release valve 6 that is actuated following the actuation of the initiator 4. The above pressurization treatment may be performed on the sample 5 only once, or may be repeated multiple times.

[0032] The cells contained in sample 5 are not particularly limited. The type of cells is also not particularly limited, and may be either prokaryotic cells (for example, cells of Escherichia coli, lactic acid bacteria, Bacillus subtilis natto, etc.) or eukaryotic cells. The eukaryotic cells are also not particularly limited, and may be plant cells (for example, angiosperm cells, gymnosperm cells, algae cells, etc.), animal cells (for example, human cells, non-human mammalian cells, avian cells, reptile cells, amphibian cells, fish cells, insect cells, etc.), and microbial cells (for example, yeast, filamentous fungi, etc.). etc.)

[0033] The concentration of cells contained in sample 5 is not particularly limited. Sample 5 can be contained in sample container 50 in a form in which cells are contained in a liquid. That is, sample 5 may be a cell suspension containing cells. The liquid contained in sample 5 is not particularly limited, but is preferably a substance with an acoustic impedance close to that of pressure wave transmission medium 7 so as not to inhibit the pressure waves, and examples thereof include silicone resin, fluororesin (e.g., PFA (perfluoroalkoxyalkane polymer), FEP (perfluoroethylenepropene copolymer), etc.). Water can typically be used as the liquid containing cells. The liquid can contain any component other than cells. These optional components may be used alone or in combination of two or more.

[0034] Pressurization using the pressure vessel 1 causes partial damage to the surface of cells contained in the sample 5. Such processed cell products may have exogenous molecules introduced into the cells via the surface damage. Furthermore, the processed cell products may be, for example, cells lacking at least some of their cytoplasmic components, or cytoplasmic components released from cells. These processed cell products can be reused for other purposes.

[0035] Of course, the pressure vessel 1 may also be pressurized for the purpose of disrupting cells contained in the sample 5. Cell disruption can also be used, for example, to obtain intracellular materials such as DNA, RNA, proteins, and organelles from cells and perform molecular diagnostics (e.g., pathogen detection platforms, immunoassays for point-of-care diagnostics, protein purification for studying protein function, structure, etc., cancer diagnosis, drug screening, mRNA transcriptome determination, and compositional analysis of specific proteins, lipids, and nucleic acids).

[0036] When a pressure treatment is performed on a sample 5 using a pressure vessel 1, it is important to accurately measure the pressure profile (pressure waveform) of the pressure wave to which the sample 5 is actually exposed during the pressure treatment. However, the pressure chamber 8 in the pressure vessel 1 is defined by a metal inner wall surface. Therefore, if the cleavage surface 41B of the explosive container 41 is cleaved by the combustion energy of the explosive during activation of the initiator 4 and the cleavage fragments come into contact with the metal inner wall surface, for example, the current supplied from the outside to the initiator 4 via the conductive pin 42 will flow through the cleavage fragments of the explosive container 41 (cleavage surface 41B) and the metal inner wall surface and will not be transmitted to the pressure sensor 9. This may result in disturbance (noise) being introduced into the pressure waveform signal output by the pressure sensor 9.

[0037] Therefore, the pressure vessel 1 according to this embodiment is provided with an insulating structure 10 to suppress a decrease in accuracy when measuring the pressure profile of the pressure wave during a pressurization process using the pressure vessel 1. The insulating structure 10 of the pressure vessel 1 is a structure for maintaining insulation between the cleaved pieces of the explosive container 41 that are cleaved by the combustion energy of the explosive associated with the ignition control of the explosive when the initiator 4 is activated and the "metallic inner wall surfaces" that define the pressure chamber 8. The metallic inner wall surfaces are metallic inner wall surfaces that define the pressure chamber 8, and examples thereof include the side inner surface 24 and bottom inner surface 25 of the vessel body 2, and the lid inner surface 26 of the lid 3.

[0038] Fig. 3 is a diagram illustrating the insulating structure 10 of the pressure vessel 1. In the embodiment shown in Fig. 1 and Fig. 2, the initiator 4 is provided on the lid portion 3, and therefore the insulating structure 10 is provided on the lid portion 3. However, the position where the insulating structure 10 is provided can be changed as appropriate depending on the installation mode of the initiator 4.

[0039] As shown in FIG. 3, the explosive container 41 of the initiator 4 is inserted into the inner surface 26 of the cover 3. (metallic inner wall surface) toward the pressure chamber 8. More specifically, if a portion of the metallic inner wall surface of the pressure vessel 1 that is located around the explosive container 41 is referred to as the container peripheral region AP, the cleavage surface 41B of the explosive container 41 is disposed in a staggered manner relative to the container peripheral region AP. Furthermore, the cover inner surface 26 (metallic inner wall surface) is formed with an inner surface recess 26A that is recessed compared to other portions, and the explosive container 41 is positioned in this inner surface recess 26A. Thus, in this embodiment, as one aspect of the insulation structure 10, the explosive container 41 is positioned in the inner surface recess 26A of the cover inner surface 26 (metallic inner wall surface), and a staggered arrangement structure of the cleavage surface 41B relative to the container peripheral region AP of the cover inner surface 26 is adopted.

[0040] 4 is a diagram illustrating the state after the cleavage surface 41B of the explosive container 41 is cleaved in accordance with the activation of the initiator 4. Reference numeral 41C shown in FIG. 4 denotes a cleavage piece after the cleavage surface 41B is cleaved. In this embodiment, by including the stepped arrangement structure of the insulating structure 10 as described above, it is possible to prevent the cleavage piece 41C from coming into contact with the metal inner wall surface (in this embodiment, the lid inner surface 26) even after the cleavage surface 41B is cleaved.

[0041] As described above, the pressure vessel 1 in this embodiment is provided with the insulating structure 10 described above, and therefore can maintain an insulating state between the metal inner wall surface (lid inner surface 26) and the cleavage piece 41C of the explosive container 41 that is cleaved (by the combustion energy of the explosive) in response to activation of the initiator 4. This makes it possible to prevent the operating current supplied when the initiator 4 is activated from flowing to the metal inner wall surface (lid inner surface 26) of the pressure vessel 1 via the cleavage piece 41C of the explosive container 41.

[0042] 5 is a graph showing the measurement results of the pressure profile during pressure treatment in the embodiment and the comparative example. The pressure vessel of the comparative example differs from the pressure vessel 1 only in that it does not have the insulating structure 10. The pressure vessel 1 equipped with the insulating structure 10 according to the embodiment can suppress disturbances (noise) from being introduced into the pressure waveform signal output by the pressure sensor 9 during pressure treatment using the pressure vessel 1. This can improve the measurement accuracy of the pressure waveform during pressure treatment using the pressure vessel 1.

[0043] <Modification> Next, modified examples of the insulation structure 10 in the pressure vessel 1 will be described. FIG. 6 is a diagram illustrating an insulation structure 10A according to the modified example. In the insulation structure 10A according to the modified example 1, at least one of the container peripheral region AP on the metal inner wall surface (lid inner surface 26) of the pressure vessel 1 and the outer surface of the cleavage surface 41B of the explosive container 41 is covered with an insulating member 100. The outer surface of the cleavage surface 41B is the surface of the cleavage surface 41B that faces the pressure chamber 8. FIG. 6(A) shows an aspect in which the container peripheral region AP on the metal inner wall surface (lid inner surface 26) is covered with the insulating member 100. FIG. 6(B) shows an aspect in which the outer surface of the cleavage surface 41B of the explosive container 41 is covered with the insulating member 100. 1C shows an embodiment in which both the container peripheral region AP on the metal inner wall surface (lid inner surface 26) and the outer surface of the cleavage surface 41B of the explosive container 41 are covered with the insulating member 100. The insulating structure 10A according to this modification also makes it possible to prevent the cleavage pieces 41C of the cleavage surface 41B, which are cleaved when the initiator 4 is activated, from coming into contact with the metal inner wall surface (lid inner surface 26). As a result, it is possible to suitably prevent a decrease in the measurement accuracy of the pressure waveform by the pressure sensor 9.

[0044] When the insulating structure 10A according to the modified example is adopted, it is not necessarily required to combine it with the staggered arrangement structure according to the insulating structure 10 described above, and the container peripheral area AP on the metal inner wall surface (lid inner surface 26) and the cleavage surface 41B on the explosive container 41 do not have to be staggered. Of course, the pressure vessel 1 may be equipped with both the insulating structure 10 and the insulating structure 10A. This allows for even more accurate pressure waveforms during pressurization using the pressure vessel 1. It is possible to measure in degrees.

[0045] In the above-described pressure vessel 1, the initiator 4 is attached to the lid 3, and therefore the inner surface 26 of the lid is used as an example of the object to be prevented from coming into contact with the cleavage piece 41C of the explosive container 41, but this is not limiting. In other words, the cleavage piece 41C of the explosive container 41 may be any metal inner wall surface that defines the pressure chamber 8. Therefore, the insulating structure 10, 10A of the pressure vessel 1 may be a structure that prevents the cleavage piece 41C from coming into contact with the side inner surface 24 or the bottom inner surface 25 of the container body 2, depending on the installation mode of the initiator 4.

[0046] Although the embodiments according to the present disclosure have been described above, each aspect disclosed in this specification can be combined with any other feature disclosed in this specification. [Explanation of symbols]

[0047] 1. Pressure vessel 2. Container body 3...Lid part 4. Initiator 5. Sample 6. Pressure relief valve 7. Pressure wave transmission medium 8. Pressure chamber 9. Pressure sensor 10,10A...insulation structure

Claims

1. a pressure chamber defined by a metal inner wall surface and capable of accommodating a sample; a pyrotechnic pressurizing device having a metal explosive container for accommodating explosives, and receiving a supply of operating power to control ignition of the explosives and release a pressure wave into the pressure chamber; a pressure sensor for measuring pressure waves emitted from the pressure device; an insulating structure for maintaining an insulating state between the metal inner wall surface and the cleavage pieces of the explosive container that are cleaved by the combustion energy of the explosive associated with the ignition control of the explosive; Equipped with Pressure vessel.

2. The explosive container protrudes toward the pressure chamber relative to a peripheral portion of the metal inner wall surface of the explosive container, the peripheral portion being located around the explosive container; The insulating structure includes a stepped arrangement structure in which the cleavage surface of the explosive container is arranged in a stepped manner relative to the peripheral portion of the container on the metal inner wall surface. The pressure vessel of claim 1.

3. The metal inner wall surface has an inner recess formed thereon that is recessed compared to other portions, and the explosive container is positioned in the inner recess.

3. The pressure vessel according to claim 1 or 2.

4. At least one of a container peripheral portion located around the explosive container on the metal inner wall surface and an outer surface of the explosive container on the rupture surface is covered with an insulating member.

3. The pressure vessel according to claim 1 or 2.

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