JP6868757B2 - Property test equipment - Google Patents

Description

The present invention relates to a property test apparatus capable of evaluating material properties in a predetermined environment such as in a hydrogen atmosphere.

Patent Document 1 below discloses a mechanical property test apparatus for performing a mechanical property test of a test piece in a high-pressure gas atmosphere. In this mechanical property test device, a load is applied to a test piece housed in the high-pressure container with a high-pressure gas containing hydrogen gas introduced into the high-pressure container, and the loaded load is measured with a strain gauge. It is something to do.

On the other hand, a property test apparatus for performing a property test such as tensile strength and bending strength of a test piece in a hydrogen atmosphere has been filed (Patent Document 2). In this property test apparatus, a flow path is provided in the thickness of a metal container having hydrogen inside, and a heat medium is passed through the flow path to control the temperature inside the container.

Japanese Unexamined Patent Publication No. 2006-349487 Japanese Patent Application No. 2016-093824

However, in the conventional mechanical characteristic test apparatus of Patent Document 1, when a load is applied to a test piece for evaluating mechanical characteristics, high-pressure oil pressurized by a hydraulic pump is alternately applied to the upper and lower parts of a piston of a hydraulic cylinder. The variable load obtained here was transmitted to the test piece via the grip material. In the fatigue tester in a hydrogen environment having such a configuration, parts such as a hydraulic pump, a hydraulic cylinder, and a hydrogen environment container are large-scale, and the structure of the test device is very complicated and expensive. In addition, it is difficult to seal the gas at the sliding portion between the rod that moves the piston by hydraulic pressure and the stationary hydrogen environment container, and there is a risk that the hydrogen-containing gas leaks to the outside of the device.

Further, even in the conventional property test apparatus of Patent Document 2, it is still difficult to seal the gas between the rod that moves the piston to give a load to the test piece and the sliding portion of the stationary hydrogen environment container, and hydrogen-containing gas is generated. There was a risk of leaking to the outside of the device.

The present invention has been made in view of such a problem. Its main purpose is to provide a characteristic test device capable of realizing a compact structure and reducing fluid leakage to the outside of the device.

The characteristic test apparatus according to the present invention for achieving the above object is a characteristic test apparatus for evaluating the characteristics or durability of a test piece in a fluid atmosphere, and includes a container for accommodating the test piece and the container and storage. By controlling the fluid supply means for supplying the fluid to the working space between the test piece and the fluid pressure adjusting means for adjusting the pressure of the fluid supplied to the working space, and the fluid pressure adjusting means. It is characterized in that it is provided with a pressure control means for applying a load to the test piece.

Further, the characteristic test apparatus according to the present invention is a characteristic test apparatus for evaluating the characteristics or durability of a test piece in a fluid atmosphere, and is a container for accommodating the test piece and the test piece housed with the container. A second fluid pressure adjusting means for adjusting the pressure of the fluid in the second working space having relative to the first working space provided between the two, and the second fluid pressure adjusting means for controlling the test piece. It is characterized by being provided with a second pressure control means for applying a load.

Further, the characteristic test apparatus according to the present invention is the characteristic test apparatus according to claim 1, wherein the second fluid pressure adjusting means for adjusting the pressure of the fluid in the second working space having relative to the working space and the second fluid pressure adjusting means. It is characterized by including a second pressure control means for controlling the second fluid pressure adjusting means and applying a load to the test piece.

Furthermore, in the characteristic test apparatus according to claim 1, the characteristic test apparatus according to the present invention supplies a second fluid different from the fluid in the working space to the second working space having a relative working space. It is characterized by including a second fluid supply means and a concentration analysis means for analyzing the concentration of the fluid contained in the second working space.

The characteristic test apparatus according to the present invention includes, in the characteristic test apparatus according to claim 2, a second fluid supply means for supplying a second fluid different from the fluid in the first working space to the second working space. It is characterized by comprising a concentration analysis means for analyzing the concentration of the second fluid contained in the first working space.

The characteristic test apparatus according to the present invention includes the heat medium supply means for supplying a heat medium to at least one flow path provided in the thickness of the container in the characteristic test apparatus according to any one of claims 1 to 5. It is characterized by being.

According to the characteristic test apparatus according to the present invention, a load can be applied to the test piece stored in the container by controlling the pressure of the fluid, so that a compact structure can be realized and a fluid leak to the outside of the apparatus can be prevented. It has the effect of being able to be reduced.

Further, according to the characteristic test apparatus according to the present invention, a load can be applied to the test piece housed in the container by controlling the second fluid pressure adjusting means, so that a compact structure can be realized and the outside of the apparatus can be realized. It has the effect of reducing fluid leakage to.

Further, according to the characteristic test apparatus according to the present invention, in addition to the effect of the characteristic test apparatus according to claim 1, the second action is obtained by changing the internal pressure of the working space and / or the second working space. It has the effect that a bending load can be applied to the test piece by the differential pressure with the space.

Furthermore, according to the characteristic test apparatus according to the present invention, in addition to the effect of the characteristic test apparatus according to claim 1, since the concentration analysis means is provided, the concentration of the fluid contained in the second working space can be determined. By analyzing, it is possible to grasp the degree of damage to the test piece caused by the bending load.

According to the characteristic test apparatus according to the present invention, in addition to the effect of the characteristic test apparatus according to claim 2, since the concentration analysis means is provided, the concentration of the second fluid contained in the first working space is analyzed. By doing so, it is possible to grasp the degree of damage to the test piece caused by the bending load.

According to the characteristic test apparatus according to the present invention, in addition to the effect of the characteristic test apparatus according to any one of claims 1 to 5, a heat medium is supplied to at least one flow path provided in the thickness of the container. This has the effect that the temperature of the container and / or the test piece can be set to a predetermined temperature.

It is a schematic block diagram which shows the 1st Example of the characteristic test apparatus of this invention. It is a waveform figure which shows the typical example of the variable load mode which is loaded on the test piece of the characteristic test apparatus of this invention. It is a schematic block diagram which shows the 2nd Example of the characteristic test apparatus of this invention. It is a schematic block diagram which shows the 3rd Example of the characteristic test apparatus of this invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

(First Example)
FIG. 1 is a conceptual configuration diagram showing a first embodiment of the characteristic test apparatus of the present invention. The characteristic test apparatus 1 of the first embodiment includes a container 3 in which the flat plate-shaped test piece 2 is housed. The container 3 has a first space 5 formed by a flat plate-shaped test piece 2 and a container upper portion 4 having a substantially inverted concave vertical cross section, and a first space 5 at a position facing the first space 5 with the flat plate-shaped test piece 2 as a boundary. It has a second space 7 formed by a lower portion 6 of a container having a substantially concave vertical cross section and a back surface of a flat plate-shaped test piece 2 which are separated from the container. The container 3 constituting the first space 5 and the second space 7 is configured such that the upper part 4 of the container and the lower part 6 of the container can be opened and closed. The container 3 is provided with a packing 8 made of metal or resin, and when such a container upper portion 4 and a container lower portion 6 are closed, the lower end portion of the container upper portion 4 and the upper end portion of the container lower portion 6 are contacted. They are superposed via the packing 8. As a result, the container 3 can be sealed, and the first space 5 and the second space 7 sealed in the container 3 can be formed.

The container 3 of the first embodiment is made of a metal containing at least one of iron, nickel, and chromium. The upper part 4 of the container has a bottomed cylindrical shape, a disk shape, or a rectangular shape that opens downward, and the lower part 6 of the container has a bottomed cylindrical shape, a disc shape, or a rectangular shape that opens upward.

Further, the characteristic test apparatus 1 of the first embodiment supplies a gas cylinder 9 as a fluid supply means for supplying a fluid for forming a test environment to the first space 5 and a fluid supplied to the first space 5. A first fluid supply system 11 including a compressor 10 as a first pressurizing means for pressurizing, a gas cylinder 12 as a second fluid supply means for supplying a fluid to the second space 7, and a second space 7 are supplied. It is provided with at least one fluid supply system of a second fluid supply system 14 including a compressor 13 as a second pressurizing means for pressurizing the fluid to be pressed.

The first fluid supply system 11 is connected to the first space 5 of the upper part 4 of the container. As a result, the gas from the gas cylinder 9 is supplied to the first space 5 of the upper part 4 of the container. Further, the second fluid supply system 14 is connected to the second space 7 of the lower portion 6 of the container. As a result, the gas from the gas cylinder 12 is supplied to the second space 7 of the lower portion 6 of the container. The fluid supply means or the second fluid supply means may be configured to supply the gas from the gas cylinders 9 and 12 via the pressure reducing valve.

The compressors 10 and 13 compress the gas from the gas cylinders 9 and 12. When the first fluid supply system 11 is provided, the pressure sensor 23 for detecting the pressure of the fluid on the output side of the compressor 10 or the pressure reducing valve is provided in the first fluid supply system 11. When the second fluid supply system 14 is provided, the pressure sensor 24 for detecting the pressure on the output side of the compressor 13 or the pressure reducing valve is provided in the second fluid supply system 14. The compressors 10 and 13 are adjusted based on the detected pressures of the pressure sensors 23 and 24 by the control of the control means described later.

Further, in the characteristic test apparatus 1 of the first embodiment, the first fluid discharge system 15 that discharges the fluid from the first space 5 to the outside of the container 3 and the fluid from the second space 7 are discharged to the outside of the container 3. It is provided with at least one fluid discharge system of the second fluid discharge system 16 for discharging. All of these fluid discharge systems hold the fluid in the device.

When the first fluid discharge system 15 is provided, the container 3 or the first fluid discharge system 15 is provided with a pressure gauge 17 for detecting the pressure in the first space 5, and is based on the pressure value of the pressure gauge 17. A first back pressure valve 18 as a fluid pressure adjusting means for adjusting the pressure of the fluid in the first space 5 and a first actuator 19 as a pressure controlling means for controlling the fluid pressure are provided. When the first fluid discharge system 15 is not provided, the pressure gauge 17 is provided in the container 3.

When the second fluid discharge system 16 is provided, the container 3 or the second fluid discharge system 16 is provided with a pressure gauge 20 for detecting the pressure in the second space 7, and the pressure value of the pressure gauge 20 is provided. A second back pressure valve 21 as a second fluid pressure adjusting means for adjusting the pressure of the fluid in the second space 7 and a second actuator 22 as a second pressure controlling means for controlling the fluid pressure are provided. There is. When the second fluid discharge system 16 is not provided, the pressure gauge 20 is provided in the container 3.

The first back pressure valve 18 is provided in the first fluid discharge system 15 and adjusts the back pressure of the fluid supplied to the first space 5. On the other hand, the second back pressure valve 21 is provided in the second fluid discharge system 16 and adjusts the back pressure of the fluid supplied to the second space 7. In the first embodiment, the first back pressure valve 18 is composed of an electric gas pressure adjusting valve whose opening degree can be adjusted according to the pressure value of the pressure gauge 17. Further, the second back pressure valve 21 is composed of an electric gas pressure adjusting valve whose opening degree can be adjusted according to the pressure value of the pressure gauge 20.

The opening degree of the first back pressure valve 18 is adjusted via the first actuator 19 as a drive unit under the control of a control means described later. Similarly, the opening degree of the second back pressure valve 21 is adjusted via the second actuator 22.

Both the first actuator 19 and the second actuator 22 use a motor (electric motor), the first actuator 19 drives the first back pressure valve 18, and the second actuator 22 drives the second back pressure valve 21. .. The actuators 19 and 22 can be composed of pneumatic, electromagnetic (solenoid), piezoelectric element (piezo stack) and the like, but in the first embodiment, they are all electric. The first actuator 19 and the second actuator 22 hold the internal pressures of the first space 5 and the second space 7 regardless of the flat plate-shaped test piece 2.

The control means includes, for example, a control circuit including a central arithmetic unit (CPU), a storage means (RAM and ROM), an input circuit from an input device such as a pressure sensor 23, 24, a pressure gauge 17, 20, a compressor, and a first. It includes an output circuit to output devices such as one actuator 19 and a second actuator 22, an operation unit that receives an operation input of a tester, and a display unit that displays them.

Next, a test method using the characteristic test apparatus 1 of the first embodiment will be described. First, the flat plate-shaped test piece 2 is placed on the upper end of the lower portion 6 of the container, and the lower end of the upper portion 4 of the container is overlapped and sealed via the packing 8. As a result, fluid is prevented from leaking from the overlapping portion between the upper end portion of the container lower portion 6 and the lower end portion of the container upper portion 4.

After accommodating the flat plate-shaped test piece 2, gas is supplied from the gas cylinder 9 to the first space 5 of the container 3 via the first fluid supply system 11. Further, gas is supplied from the gas cylinder 12 to the second space 7 of the container 3 via the second fluid supply system 14. The gas supplied to the first space 5 and the second space 7 is compressed by the compressors 10 and 13, respectively. At this time, the compressors 10 and 13 are controlled so as to maintain the detected pressures obtained from the pressure sensors 23 and 24, respectively. When the pressure of the gas cylinders 9 and 12 is high, a pressure reducing valve can be used instead of the compressors 10 and 13.

At the time of the test, the flat plate-shaped test piece 2 is sandwiched between the upper part 4 of the container and the lower part 6 of the container, and is fixed in a state where the first space 5 and the second space 7 are separated from each other. The gas pressure of the first space 5 is applied to the upper surface of the flat plate-shaped test piece 2, and the pressure of the second space 7 is applied to the lower surface of the flat plate-shaped test piece 2.

Then, under the control of the control means, the signal of the first actuator 19 is given to the first back pressure valve 18 and / or the signal of the second actuator 22 is given to the second back pressure valve based on the pressure values detected by the pressure gauges 17 and 20. By giving to 21, the pressures of the first space 5 and the second space 7 in the container 3 can be adjusted to predetermined pressures.

Here, when the characteristic test apparatus 1 includes the first back pressure valve 18 and the first actuator 19 and does not include the second fluid discharge system 16, for example, it is based on the pressure detected by the pressure gauges 17 and 20. The internal pressure of the first space 5 can be retained, and the fatigue failure test can be performed by the fluctuation of the pressure difference between the first space 5 and the second space 7.

When the characteristic test device 1 is not provided with the first fluid discharge system 15 and is provided with the second back pressure valve 21 and the second actuator 22, for example, the pressure detected by the pressure gauges 17 and 20 is used as a base. The internal pressure of the second space 7 can be retained, and the fatigue failure test can be performed by the fluctuation of the pressure difference between the first space 5 and the second space 7.

Further, when the characteristic test apparatus 1 includes both the first actuator 19 and the second actuator 22, a more complicated test can be performed by the fluctuation of the pressure difference between the first space 5 and the second space 7. .. For example, it is possible to carry out a test in which the flat plate-shaped test piece 2 is fatigue-fractured in a single or a plurality of bending load modes. In this case, since the actuators 19 and 22 are not composed of air pressure or hydraulic pressure, the characteristic test apparatus 1 can be made compact.

As described above, according to the characteristic test apparatus 1 of the first embodiment, the first actuator 19 and / or the second actuator 22 is driven to be aligned with the first back pressure valve 18, and at least the second back pressure valve 21. By adjusting one of them, the pressure of the fluid in the first space 5 and the pressure of the fluid in the second space 7 are intermittently and continuously provided to be intermittently provided with respect to the flat plate-shaped test piece 2. Bending load can be applied targetly and continuously.

That is, instead of applying a load to the flat plate-shaped test piece 2 by a hydraulic pump, a cylinder, or the like, a bending load is applied to the flat plate-shaped test piece 2 by the differential pressure between the first space 5 and the second space 7 forming an atmosphere. It becomes possible. With such a configuration, it is possible to eliminate the sliding portion between the rod and the stationary hydrogen environment container, which has conventionally applied a load to the test piece by the piston movement. As a result, gas leaks such as hydrogen can be reduced to a negligible level, and high safety can be ensured.

In addition, a mechanism that applies a load to a test piece such as a hydraulic pump or a cylinder becomes unnecessary, and a very compact testing machine can be created.

In the characteristic test apparatus 1 of the first embodiment, a flat plate is formed by filling at least one of the gas cylinders 9 and 12 with a hydrogen gas cylinder and filling at least one of the first space 5 and the second space 7 with hydrogen gas. It is possible to evaluate the characteristics of the state test piece 2 in a hydrogen gas environment.

As described above, the characteristic test apparatus 1 for evaluating the characteristics or durability of the flat plate-shaped test piece 2 in a fluid atmosphere, the container 3 accommodating the flat plate-shaped test piece 2 and the flat plate-shaped test housed in the container 3. A fluid supply means for supplying hydrogen gas to the first space 5 between the pieces 2, a fluid pressure adjusting means 18 for adjusting the pressure of the hydrogen gas supplied to the first space 5, and a fluid pressure adjusting means 18. When the pressure control means 19 for controlling and applying a load to the flat plate-shaped test piece 2 is provided, the characteristics of the flat plate-shaped test piece 2 in a hydrogen gas environment can be obtained with a compact device and of hydrogen gas. It can be evaluated while preventing leakage.

FIG. 2 shows an example of the bending load mode. By receiving the signal of the first actuator 19 to operate the first back pressure valve 18 and / or receiving the signal of the second actuator 22 to operate the second back pressure valve 21, the trapezoidal wave 25, the square wave 26, and the triangular wave are operated. A bending load mode such as 27 can be applied to the flat plate test piece 2.

In the characteristic test apparatus 1 of the first embodiment, the test piece has a flat plate shape, but the characteristic test of the test piece may be performed in the same manner regardless of whether the test piece is generally flat or hemispherical. Is possible.

Further, in the first embodiment, gas is mentioned as an example of the fluid supplied to the first space 5 and the fluid supplied to the second space 7, but the present invention is not limited thereto. For example, at the test temperature, it may be a substance in a liquid state or a substance in a gas state. Examples of the substance in a liquid state at the test temperature include liquid water, alcohol, and oil. The fluid may be any of these. Examples of the substance in a gas state at the test temperature include a reducing gas such as hydrogen, an inert gas or an inert gas such as nitrogen and argon, a noble gas group element such as helium, air, oxygen and water vapor. The fluid may be any of these.

Further, in the first embodiment, the container 3 is composed of a container upper portion 4 having a substantially inverted concave vertical cross section and a container lower portion 6 having a substantially concave vertical cross section, but the present invention is limited thereto. It's not a thing. The container 3 may have a working space between the container 3 and the test piece. The working space may have at least a fluid passage, and may have, for example, a container 3 having one or a plurality of concave grooves, or a structure such as a fuel cell separator.

FIG. 1 shows a characteristic test apparatus 1 in the case where both the fluid supply means 9 and the first fluid discharge system 15 are provided, and both the second fluid supply means 12 and the second fluid discharge system 16 are provided. However, the present invention is not limited to this. For example, when the characteristic test apparatus 1 includes the fluid supply means 9 and the first fluid discharge system 15, and the characteristic test apparatus 1 includes the second fluid supply means 12 and the second fluid discharge system 16, the fluid supply means 9 When the first fluid discharge system 15 and the second fluid supply means 12 are provided, the case where the fluid supply means 9, the second fluid supply means 12, and the second fluid discharge system 16 are provided may be provided. .. In these cases, the first fluid discharge system 15 or the second fluid discharge system 16 may or may not have a back pressure valve and an actuator, and at least one set of the back pressure valve and the actuator may be provided. Any combination of the above may be provided.

In the first embodiment, the case where the first back pressure valve 18 is used as the fluid pressure adjusting means has been given, but if the fluid pressure adjusting means regulates the pressure of the fluid in the first space 5. Well, it's not limited to this at all. Similarly, the second fluid pressure adjusting means may be any one as long as it regulates the pressure of the fluid in the second space 7, and is not limited to the second back pressure valve 21 mentioned in the above embodiment.

(Second Example)
The characteristic test apparatus of the second embodiment is for quantifying the characteristics of the test piece, and is not limited to the first embodiment described above, and can be appropriately changed. FIG. 3 is a schematic configuration diagram showing a characteristic test apparatus of the second embodiment. The characteristic test apparatus 1 of the second embodiment is basically the same as the characteristic test apparatus 1 of the first embodiment. Therefore, in the following, the differences between the two will be mainly described, and the corresponding parts will be described with the same reference numerals. Further, the description of matters common to both examples will be omitted.

The characteristic test apparatus 1 of the second embodiment has a second fluid discharge system 16 for discharging a second fluid having a composition different from that of the fluid in the first space 5 to the outside of the container, and the container is discharged from the second space 7. 3 A concentration analyzer 28 for analyzing the concentration of the fluid leaked from the first space 5 to the second space 7 contained in the second fluid discharged to the outside is provided. Further, the concentration analyzer 28 includes a data recording system 29 for recording the measured concentration value. Gas cylinders 9 and 12 have different compositions.

The concentration analyzer 28 is provided in the second fluid discharge system 16 and includes a metal oxide semiconductor gas sensor as a detector and a column which is a tube for separating the sample gas. The concentration analyzer 28 performs gas analysis using a gas chromatography technique and separates the gas by utilizing the difference in the speed at which the gas component passes through the column. The gas component is identified by the appearance time (retention time) of the peak in the chromatogram. Various gas types can be supported by changing the column.

The data recording system 29 is a personal computer incorporating dedicated software. By operating the operation unit of the data recording system 29, for example, the sample name, the measurement time, the measurement temperature, and the like are input, and after the measurement, the measurement result is displayed on the screen output unit of the data recording system 29. Further, since the measurement data is stored in the storage unit of the data recording system 29, it can be easily managed and searched.

Next, the operation of the characteristic test apparatus 1 of the second embodiment will be described. After the flat plate-shaped test piece 2 is housed in the container 3, gas is supplied from the gas cylinders 9 and 12 to the first space 5 and the second space 7 of the container 3 via the fluid supply systems 11 and 14. In this case, the types of the fluid in the first space 5 and the second fluid in the second space 7 are different. For example, a hydrogen cylinder is used as the gas cylinder 9, the first space 5 is filled with hydrogen gas, and an argon cylinder is used as the gas cylinder 12, and the second space 7 is filled with argon gas. When the pressure of the gas supplied to the first space 5 and the second space 7 is low, the gas is compressed by the compressors 10 and 13. On the contrary, when the pressure of the gas cylinders 9 and 12 is high, a pressure reducing valve is used instead of the compressors 10 and 13.

In this state, the pressure of the fluid in the first space 5 is made higher than the pressure of the second fluid in the second space 7, and the first space 5 to the second contained in the second fluid discharged from the second space 7 By analyzing the concentration of the fluid leaked into the space 7 with the concentration analyzer 28, it is possible to measure the gas permeation characteristics of the flat plate-shaped test piece 2, for example, the gas diffusion coefficient of Fick's law.

More specifically, in the case of the second embodiment, the concentration of hydrogen leaked into argon can be measured by analyzing the concentration of the gas in the second fluid discharge system 16 with the concentration analyzer 28. ..

According to the characteristic test apparatus 1 of the second embodiment, the type of the fluid in the first space 5 and the second fluid in the second space 7 are different, and the flat plate-shaped test piece 2 has a static bending load or fluctuation. A flat plate test generated by the bending load by applying a specific bending load and analyzing the concentration of the fluid leaking from the first space 5 to the second space 7 contained in the second fluid discharged from the second space 7. It is possible to continuously track the degree of damage of the piece 2 and the change over time of the damage.

Further, according to the characteristic test apparatus 1 of the second embodiment, the types of the fluid in the first space 5 and the second fluid in the second space 7 are different, and the pressure of the fluid in the first space 5 is adjusted to the pressure of the fluid in the second space 7. By analyzing the concentration of the fluid leaked from the first space 5 to the second space 7 contained in the second fluid discharged from the second space 7, the pressure of the second fluid is higher than that of the second fluid. It is possible to identify the permeability of two fluids, especially the diffusion coefficient of the fluid.

Further, by receiving the signal of the first actuator 19 as the pressure control means and operating the first back pressure valve 18 as the pressure adjusting means, the pressure of the fluid in the first space 5 is trapezoidal as shown in FIG. The flat plate-shaped test piece 2 can be loaded with a wave-shaped bending load mode as shown in FIG. 2 by varying the wave shape into a wave 25, a square wave 26, a triangular wave 27, or the like. In this case, by analyzing the concentration of the fluid leaked from the first space 5 to the second space 7 in the second fluid discharged from the second space 7 with the concentration analyzer 28, a flat plate test with a fluctuating load is performed. It is possible to quantitatively grasp the temporal characteristics of the damage of the piece 2. Further, since the data recording system 29 is provided, it can be recorded as data.

In this way, instead of applying a load to the flat plate test piece 2 by a hydraulic pump, a hydraulic cylinder, or the like, the flat plate shape is formed by the differential pressure between the first space 5 and the second space 7 that form the atmosphere of the flat plate test piece 2. A bending load can be applied to the test piece 2. With such a configuration, it is possible to eliminate the sliding part between the rod and the stationary hydrogen environment container, which has conventionally applied a load to the test piece by the piston movement by flood control, so gas leaks such as hydrogen can be ignored. It can be reduced as much as possible, and high safety can be ensured. In addition, a mechanism that applies a load to a test piece such as a hydraulic pump or a hydraulic cylinder becomes unnecessary, and a very compact testing machine can be created.

In particular, in the characteristic test apparatus 1 of the second embodiment, for example, a hydrogen gas cylinder is used for the fluid supply means 9, hydrogen gas is circulated in the first space 5, and an argon gas cylinder is used in the second fluid supply means 12. Argon gas is circulated in the second space 7 by the use. In this state, the concentration analyzer 28 is used as a hydrogen gas analyzer to measure the concentration of hydrogen gas leaking into the argon gas from the first space 5 to the second space 7, thereby allowing the flat plate-shaped test piece 2 to permeate the hydrogen gas. The characteristics, for example, the hydrogen gas diffusion coefficient can be measured. It is also possible to evaluate the temporal characteristics of damage of the flat plate-shaped test piece 2 under a fluctuating bending load.

In the characteristic test apparatus 1 of the second embodiment, the fluid in the first space 5 and the second fluid may be different fluids, and the fluid in the first space 5 and the second fluid may be, for example, the test temperature. In, it may be a substance in a liquid state or a substance in a gas state. The substance in a liquid state at the test temperature may be liquid water, alcohol, or oil. The substance in a gas state at the test temperature may be hydrogen, nitrogen, air, oxygen, argon, helium, water vapor or the like.

Further, in the second embodiment, an example of a gas analyzer is given as the concentration analyzer 28, but the present invention is not limited to this. For example, the concentration analyzer 28 may be a liquid analyzer, an oxygen concentration meter, a mass spectrometer, a trace concentration gas analyzer, a JIS standard oxygen analyzer, or the like.

FIG. 3 shows the fluid supply means 9, the first fluid discharge system 15, the second fluid supply means 12, the second fluid discharge system 16, the first back pressure valve 18, the first actuator 19, and the concentration analysis. Although the characteristic test apparatus 1 in the case where the total 28 and the data recording system 29 are provided is illustrated, the present invention is not limited to this. For example, the characteristic test device 1 is provided in the fluid supply means 9, the first fluid discharge system 15, the second fluid supply means 12, the second fluid discharge system 16, and the second fluid discharge system 16. A back pressure valve, a second actuator for driving the second back pressure valve, a concentration analyzer provided in the first fluid discharge system 15, and a data recording system for recording the concentration value measured by the concentration analyzer are provided. It may be the one that has. In this case, a static bending load or a variable bending load is applied to the flat plate-shaped test piece 2, and the fluid contained in the fluid discharged from the first space 5 leaks from the second space 7 to the first space 5. The concentration of the second fluid can be analyzed.

(Third Example)
FIG. 4 is a schematic configuration diagram showing a characteristic test apparatus of the third embodiment. The characteristic test apparatus 1 of the third embodiment is basically the same as the characteristic test apparatus 1 of the first embodiment and the second embodiment, but from a low temperature to a high temperature below the freezing point. It is characterized in that the characteristics of the flat plate-shaped test piece 2 can be tested in a wide temperature range. Therefore, in the following, the differences between the first embodiment, the second embodiment, and the third embodiment will be mainly described, and in particular, the differences between the second embodiment and the third embodiment will be mainly described. However, the corresponding parts will be described with the same reference numerals. Further, the description of matters common to both examples will be omitted.

In the characteristic test apparatus 1 of the third embodiment, at least one heat medium flow path 30 through which the heat medium flows is provided within the thickness of at least one of the container upper part 4 and the container lower part 6. A heat medium is supplied to the heat medium flow path 30 from the heat medium supply means 31.

The heat medium supply means 31 is a means for supplying the heat medium to the heat medium flow path 30 provided within the thickness of the container 3, and in the third embodiment, the container 3 and the flat plate-shaped test piece 2 are cooled. The heat medium tank 32 that stores the heat medium to be heated, the heat medium supply pump 33 that supplies the heat medium of the heat medium tank 32 to the heat medium flow path 30, and the heat from the heat medium tank 32 via the heat medium supply pump 33. It is configured to include a heat medium supply path 34 supplied to the medium flow path 30.

The heat medium tank 32 is provided with a system for cooling and heating the heat medium stored inside, whereby the heat medium having a predetermined temperature can be stored in the heat medium tank 32. The heat medium supply pump 33 is controlled based on the detection temperature of the temperature sensor 35 provided in the container 3. The heat medium supplied to the heat medium flow path 30 is returned to the heat medium tank 32 via the heat medium return path 36 connected to the other end of the heat medium flow path 30.

According to the characteristic test apparatus 1 of the third embodiment, the temperature of the container 3 and the flat plate-shaped test piece 2 is obtained by supplying the heat medium to at least one heat medium flow path 30 provided at the thickness of the container 3. Can be set to a predetermined temperature.

Further, according to the characteristic test apparatus 1 of the third embodiment, the test can be performed while rapidly changing the temperatures of the container 3 and the flat plate-shaped test piece 2. For example, the temperature may be changed from the preset first set temperature to the second set temperature, or the temperature may be repeatedly changed between the first set temperature and the second set temperature. This is done by controlling the temperature of the heat medium tank 32 and the flow rate with the heat medium supply pump 33 based on the temperature detected by the temperature sensor 35.

Further, the heat medium of the third embodiment may be, for example, a two-phase flow of hot water, cold water, steam, liquid water and steam. Further, silicone oil, Dowtham A, air, acetone, liquid nitrogen, liquid helium, carbon dioxide, chlorofluorocarbon, ammonia, alcohol and the like may be used.

Further, in the first embodiment, the container 3 is made of a metal containing at least one element of iron, nickel, and chromium, but is made of copper or a copper alloy, which is superior in thermal conductivity to iron, aluminum, or It may be made of an aluminum alloy or carbon.

FIG. 4 shows the fluid supply means 9, the first fluid discharge system 15, the second fluid supply means 12, the second fluid discharge system 16, the first back pressure valve 18, the first actuator 19, and the concentration analysis. The characteristic test apparatus 1 in the case where a total of 28, a data recording system 29, and a heat medium supply means 31 are provided is shown, but the present invention is not limited thereto. For example, when the characteristic test apparatus 1 includes the fluid supply means 9, the first fluid discharge system 15, and the heat medium supply means 31, the second fluid supply means 12, the second fluid discharge system 16, and the like. When the heat medium supply means 31 is provided, the fluid supply means 9, the first fluid discharge system 15, the second fluid supply means 12, and the heat medium supply means 31 are provided. , The second fluid supply means 12, the second fluid discharge system 16, and the heat medium supply means 31 may be provided. In these cases, the first fluid discharge system 15 or the second fluid discharge system 16 may or may not have a back pressure valve and an actuator, and at least one set of the back pressure valve and the actuator may be provided. Any combination of the above may be provided.

The following technical ideas can be grasped from the above embodiment.
(1) By varying the difference pressure between the internal pressure of the first space (the working space) and the internal pressure of the second space (the second working space), the fluid applies a load to at least one surface of the test piece. A characteristic test device characterized by the fact that.

According to the invention of (1), a large-scale and complicated structure part is not required, and a low-cost characteristic test apparatus can be provided.

The present invention is applied to a property test apparatus for evaluating material properties such as gas permeability and fatigue properties of a specimen exposed to a hydrogen environment.

1 Characteristic test device 2 Flat plate test piece (test piece)
3 Container 4 Upper part of container 5 First space (working space, first working space)
6 Lower part of container 7 Second space (second working space)
8 Packing 9 Gas cylinder (fluid supply means)
10 Compressor 11 First fluid supply system 12 Gas cylinder (second fluid supply means)
13 Compressor 14 Second fluid supply system 15 First fluid discharge system (fluid discharge means)
16 Second fluid discharge system (second fluid discharge means)
17 Pressure gauge 18 First back pressure valve (fluid pressure adjusting means)
19 First actuator (pressure control means)
20 Pressure gauge 21 Second back pressure valve (second fluid pressure adjusting means)
22 Second actuator (second pressure control means)
23 Pressure sensor 24 Pressure sensor 25 Trapezoidal wave bending load 26 Square wave bending load 27 Triangle wave bending load 28 Concentration analyzer (concentration analysis means)
29 Data recording system 30 Heat medium flow path 31 Heat medium supply means 32 Heat medium tank 33 Heat medium supply pump 34 Supply path 35 Temperature sensor 36 Heat medium return path

Claims (3)

A property test device that evaluates the characteristics or durability of a test piece in a fluid atmosphere.
A container for accommodating the test piece, which is partitioned by the test piece into a first working space and a second working space each having a constant volume.
A fluid supply means for supplying fluid to at least one working space of the first working space and the second working space formed between the container and the stored test piece.
A fluid pressure adjusting means for adjusting the pressure of the fluid supplied to the working space, and
A pressure control means that controls the fluid pressure adjusting means to give the test piece a repeatedly fluctuating bending load.
A characteristic test device characterized by being equipped with. A second fluid supply means for supplying a second fluid different from the first fluid in the first working space to the second working space,
A concentration analysis means for analyzing a change over time in the concentration of the first fluid contained in the second fluid, which cross-leaks into the second working space due to the breakage of the test piece.
The characteristic test apparatus according to claim 1, wherein the characteristic test apparatus is provided. Claim 1, characterized in that it comprises a heating medium supply means Ru varied by supplying the temperature of the container between the two set temperatures of the heating medium into at least one channel provided in the thickness of the container The characteristic test apparatus according to any one of 1 to 2.

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