Hydrogen brittleness testing device with heat exchanger

Abstract

The present invention relates to a hydrogen brittleness testing apparatus provided with a heat exchanger for testing stress corrosion cracking of a test piece according to hydrogen brittleness. The hydrogen brittleness testing apparatus provided with a heat exchanger according to an embodiment of the present invention comprises: a test chamber into which hydrogen is supplied into a test space formed therein; the fixing clamp is used for fixing a test piece placed in the test cavity; the stretching rod is used for stretching the test piece fixed on the fixing clamp; and a heat exchanger which is provided inside the test chamber and exchanges heat between hydrogen and a heat medium to adjust the temperature of hydrogen by exchanging heat between the hydrogen supplied to the inside of the test chamber and the heat medium. Therefore, heat exchange of hydrogen can be quickly performed, and heat exchange performance can be improved.

Description

Technical Field

[0001] The present invention relates to a hydrogen embrittlement test device with a heat exchanger for testing stress corrosion cracking of test pieces according to hydrogen embrittlement. Background Art

[0002] Generally, when a metal is subjected to a tensile stress in a corrosive environment, cracking occurs without plastic deformation, and this phenomenon is called stress corrosion cracking.

[0003] Stress corrosion cracking is mainly classified into corrosion caused by hydrogen embrittlement and active stress corrosion in which residual or applied stress causes deformation of the metal.

[0004] Since active stress corrosion is caused by the characteristics of the structure, when performing a test according to active stress corrosion, the test can be carried out in a state where the test piece is exposed to the atmosphere. However, since hydrogen embrittlement requires testing in a hydrogen atmosphere, the test needs to be carried out in a hydrogen chamber.

[0005] Regarding a device for testing hydrogen embrittlement, the "hydrogen embrittlement test device for metals" of Korean Patent Publication No. 10-2154632 (announced on September 10, 2020) has been previously disclosed.

[0006] The above-mentioned existing hydrogen embrittlement test device for metals includes: a housing that forms a circular space portion opening towards one side inside and has a mounting hole formed at the bottom; a test piece fixing member that fixes one end of a metal test piece at one end, and the test piece fixing member is fixedly coupled to the mounting hole such that one end is located in the space portion and the other end is located outside the housing; a piston that fixes the other end of the metal test piece in a region facing the test piece fixing member and is movably provided in the space portion; a cover member that is coupled to the housing to close the space portion; and a connecting member that is airtight at one end, passes through the cover member to be coupled to the piston, and the other end is located outside the cover member to be connected to a tensile testing machine. And the hydrogen embrittlement test device is configured to connect the other end of the connecting member to one side of the tensile testing machine, or connect the other end of the connecting member to one side of the tensile testing machine and connect the other end of the test piece fixing member to the other side of the tensile testing machine, and then supply hydrogen to the space portion to be able to perform a tensile test on the metal test piece in a hydrogen atmosphere.

[0007] In the existing hydrogen embrittlement test device for metals configured as such, after setting a metal test piece inside the housing, high-pressure hydrogen is supplied to the space portion of the housing to stretch the metal test piece, so that changes in the characteristics of the metal can be measured in a hydrogen atmosphere.

[0008] However, in order to adjust the hydrogen temperature, the existing hydrogen embrittlement test device for metals supplies a heat medium to the outer shell. Therefore, not only does the heat exchange efficiency of hydrogen decrease due to the reduced heat insulation between the device and the outside, but it is also difficult to quickly adjust the temperature of hydrogen because the heat medium needs to exchange heat with the entire outer shell.

[0009] In addition, since hydrogen is injected into the interior of the outer shell, there is a problem of hydrogen leakage when hydrogen embrittlement occurs in the outer shell.

[0010] In addition, since the fixing fixture is provided on a separate frame, the frame makes the size of the device too large, resulting in the problem of requiring a large installation space. Summary of the Invention

[0011] (I) Technical Problems to be Solved

[0012] The present invention is proposed to solve the above problems. The problem to be solved by the present invention is to provide a hydrogen embrittlement test device equipped with a heat exchanger, in which a heat exchanger for heat exchange with hydrogen is provided inside the test chamber, so as to easily adjust the temperature of hydrogen filled in the test chamber and improve the heat exchange performance by minimizing heat loss.

[0013] In addition, the purpose is to provide a hydrogen embrittlement test device equipped with a heat exchanger. Since the heat exchanger is formed in a shape where flow channels are formed on heat exchange plates and multiple heat exchange plates are laminated and diffusion-bonded, not only can a minimized heat exchanger be manufactured, but also the heat exchanger can be easily manufactured in a shape with the best heat exchange efficiency.

[0014] In addition, the purpose is to provide a hydrogen embrittlement test device equipped with a heat exchanger. A rod support part is provided in the test chamber to support the fixing fixture, so there is no need to provide a frame for supporting the fixing fixture, and thus the installation space can be minimized by minimizing the volume.

[0015] In addition, the purpose is to provide a hydrogen embrittlement test device equipped with a heat exchanger. Since the test chamber is arranged inside an outer container, not only can hydrogen leakage be prevented, but also since a lining made of a material with hydrogen embrittlement resistance is arranged inside the outer container, the outer container can be prevented from being damaged due to hydrogen embrittlement.

[0016] (II) Technical Solutions

[0017] In order to achieve the above object, a hydrogen embrittlement test apparatus having a heat exchanger according to an embodiment of the present invention includes: a test chamber into which hydrogen is supplied to a test space formed therein; a fixing jig for fixing a test piece placed inside the test chamber; a tensile rod for stretching the test piece fixed to the fixing jig; and a heat exchanger provided inside the test chamber for exchanging heat between hydrogen and a heat medium, so as to adjust the temperature of hydrogen by exchanging heat between the hydrogen supplied to the inside of the test chamber and the heat medium.

[0018] In the heat exchanger, a flow path through which the heat medium passes may be formed in a heat exchange plate by grinding or etching, and a plurality of the heat exchange plates may be stacked and diffusion-bonded.

[0019] The heat exchange plate may include: heat exchange pins protruding outward to improve heat exchange with the hydrogen.

[0020] The heat exchanger may have an overall circular shape to be accommodated in the test space, and the flow path and the heat exchange plate may be formed in a zigzag shape along the inner circumferential direction of the test space and have an overall circular shape.

[0021] The hydrogen embrittlement test apparatus having a heat exchanger may include: an outer container that houses the test chamber inside and blocks hydrogen supplied to the test chamber from leaking to the outside while withstanding the pressure of the hydrogen, so as to supply the hydrogen at a preset pressure.

[0022] The hydrogen embrittlement test apparatus having a heat exchanger may include: a lining having hydrogen embrittlement resistance and overlapping on the inner circumference of the outer container to prevent the outer container from being damaged due to hydrogen embrittlement.

[0023] The hydrogen embrittlement test apparatus having a heat exchanger may include: a heat insulation member that surrounds the outer edge of the test space in the test chamber to insulate the test space.

[0024] The test chamber may include: a rod support portion that supports the fixing jig on the test chamber.

[0025] The test chamber may include: an entrance / exit that penetrates the side surface of the test chamber and communicates with the test space to place a test piece inside the test chamber and take out the test piece from inside the test chamber.

[0026] (III) Advantageous Effects

[0027] According to the present invention, a heat exchanger through which a heat medium passes is provided inside the test chamber to quickly exchange heat with hydrogen filled in the test space. Therefore, not only can the temperature adjustment of hydrogen be quickly performed, but also since heat exchange is performed inside the test space, heat loss can be minimized to improve heat exchange performance.

[0028] In addition, the heat exchanger is configured in a form in which a plurality of heat exchange plates formed with flow channels are laminated and then diffusion-bonded. Therefore, not only can the size of the heat exchanger be minimized and it can be disposed inside the test chamber, but also it can be easily manufactured into a shape capable of generating optimal heat exchange performance in the test space, thereby improving heat exchange performance.

[0029] In addition, an outer container is provided outside the test chamber. Therefore, not only can leakage of hydrogen supplied to the test space be prevented, but also since a lining is provided inside the outer container, the outer container can be prevented from being damaged due to hydrogen embrittlement.

[0030] In addition, since the fixing jig is supported by the rod support portion of the test chamber, there is no need to provide a separate frame for supporting the fixing jig, and thus the installation space can be minimized by minimizing the volume of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is an exploded perspective view of a hydrogen embrittlement test device including a heat exchanger according to an embodiment of the present invention.

[0032] Figure 2 is an exploded perspective view of a test chamber of a hydrogen embrittlement test device including a heat exchanger according to an embodiment of the present invention.

[0033] Figure 3 is a side cross-sectional view of a hydrogen embrittlement test device including a heat exchanger according to an embodiment of the present invention.

[0034] Figure 4 is a perspective view of a heat exchanger of a hydrogen embrittlement test device including a heat exchanger according to an embodiment of the present invention.

[0035] Figure 5 is a plan view of a heat exchange plate of a heat exchanger of a hydrogen embrittlement test device including a heat exchanger according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0037] As Figures 1 to 3 shown, a hydrogen embrittlement test device 100 including a heat exchanger according to an embodiment of the present invention may include a test chamber 110.

[0038] A test space 111 for accommodating a test piece can be formed in the test chamber 110, enabling a hydrogen embrittlement test to be performed on a test piece of a preset size.

[0039] Among them, the hydrogen embrittlement test can be a form of test device that observes the deformation of a test piece by stretching the test piece in a hydrogen environment of the test piece and according to the change of the test piece of hydrogen embrittlement, and the hydrogen embrittlement test can be a Slow Strain Rate Test (SSRT) or a Constant Elongation Rate Test (CERT).

[0040] The test chamber 110 can be formed in a cylindrical shape with a hollow interior. On one or both sides of the outer edge of the test chamber 110, an entrance / exit 113 communicating with the test space can be formed, and the test piece can be inserted and removed through the entrance / exit 113.

[0041] The test chamber 110 can have a form in which an upper crown, a lower crown of a pressing device, and columns supporting the upper crown and the lower crown are integrally formed.

[0042] A rod support part 119 can be provided at the upper part of the test chamber 110. The rod support part 119 is arranged such that a fixing jig 130 for fixing the test piece described below passes through the upper part of the test chamber 110 and is located in the test space 111.

[0043] The rod support part 119 can include support bosses 119a and a boss plate 119b. A plurality of support bosses 119a are erected at the upper part of the test chamber 110, and the boss plate 119b can be combined with the upper parts of the plurality of support bosses 119a in a form connecting the plurality of support bosses 119a.

[0044] At this time, the center of the boss plate 119b can be in a form of being centrally penetrated, such that the fixing jig 130 is inserted through the upper rod hole 115 and is located in the test space 111.

[0045] An upper rod hole 115 can be formed through the upper part of the test chamber 110. The upper rod hole 115 is penetrated such that the fixing jig 130 passes through the upper rod hole 115 from the rod support part 119 located at the upper part of the test chamber 110 and is located in the test space 111. And a lower rod hole 117 can be formed through the lower part of the test chamber 110. The lower rod hole 117 is penetrated such that a tensile rod 140 described below enters and exits the test space 111 and applies a tensile force or releases a tensile force to the test piece.

[0046] The test chamber 110 can also be formed of a metal material with excellent hydrogen embrittlement resistance, such as stainless steel, aluminum, titanium, austenite, martensite, etc., or a series thereof, or an alloy containing the metal material, or a synthetic resin.

[0047] As Figures 1 to 3 shown, the hydrogen embrittlement test apparatus 100 having a heat exchanger according to an embodiment of the present invention may include a heat insulating member 120.

[0048] The heat insulating member 120 may insulate the inside and outside of the test space 111 so that the internal temperature of the test space 111 can be kept constant.

[0049] The heat insulating member 120 may surround the test space 111 at the outer edge of the test space 111 for heat insulation.

[0050] The heat insulating member 120 may be combined in a form divided into a plurality of parts to surround the test space 111.

[0051] For example, the heat insulating member 120 may include a side heat insulating member 121, a lower heat insulating member 125, and an upper heat insulating member 123. A plurality of side heat insulating members 121 may be combined with each other to surround the outer edge of the test space 111. The upper heat insulating member 123 may seal the upper part of the opening of the test space 111 surrounded by the side heat insulating member 121, and the lower heat insulating member 125 may seal the lower part of the opening of the test space 111 surrounded by the side heat insulating member 121.

[0052] At this time, the side heat insulating member 121 may not only insulate the inner outer edge of the test space 111, but also seal the entrance / exit 113 penetrating the outer edge of the test chamber 110, so as to be completely insulated from the outside of the test chamber 110.

[0053] Of course, the side heat insulating member 121 located at the entrance / exit 113 may be detachably coupled to the test chamber 110 so that a test piece can be inserted into and removed from the test space 111 through the entrance / exit 113.

[0054] In addition, configured to be separated left and right by the upper heat insulating member 123 and the lower heat insulating member 125, the upper part of the experimental space 111 can be heat-insulated by combining the separated upper heat insulating member 123, and the lower part of the experimental space 111 can be heat-insulated by combining the separated lower heat insulating member 125.

[0055] The heat insulating member 120 may be formed of a material such as a metal having excellent heat insulation or a synthetic resin having both heat insulation and hydrogen embrittlement resistance.

[0056] As Figures 1 to 3 shown, the hydrogen embrittlement test apparatus 100 having a heat exchanger according to an embodiment of the present invention may include a fixing jig 130 and a tensile rod 140.

[0057] The fixing fixture 130 can fix the test piece. The fixing fixture 130 can be located in the test space 111, and the fixing fixture 130 includes a fixing rod 131, such that one end of the fixing rod 131 is provided with the fixing fixture 130 and is located in the test space 111, and the other end of the fixing rod 131 passes through the upper rod hole 115 and the boss plate 119b of the test chamber 110 and protrudes upward from the upper part of the boss plate 119b.

[0058] The fixing fixture 130 can further include a rod adjusting member 133.

[0059] The rod adjusting member 133 is provided at the end of the fixing rod 131 passing through the support plate, and can adjust the height of the fixing fixture 130 in the test space 111 in a form of adjusting the height of the fixing rod 131 on the support plate.

[0060] Threads are formed at the other end of the fixing rod 131, and the rod adjusting member 133 can be coupled to the threads in a form of thread fastening, such that when the rod adjusting member 133 is rotated on the fixing rod 131, the height of the fixing fixture 130 in the test space 111 is adjusted in a form of the fixing rod 131 moving in the vertical direction due to thread fastening.

[0061] Wherein, since the fixing fixture 130 is supported by the rod support portion 119 at the upper part of the test chamber 110, there is no need to provide a separate frame for supporting the fixing fixture 130, thereby minimizing the volume of the test device.

[0062] The tensile rod 140 passes through the lower rod hole 117 of the test chamber 110, one end is located in the test space 111 to face the fixing fixture 130, and the other end can be located at the lower part of the test chamber 110.

[0063] The tensile rod 140 can move up and down in the test space 111 through a tensile mechanism such as a pneumatic cylinder or a hydraulic cylinder, and the tensile rod 140 can perform a test according to hydrogen embrittlement by stretching the test piece coupled to the fixing fixture 130.

[0064] One end of the tensile rod 140 located in the test space 111 is provided with a tensile fixture 141 corresponding to the fixing fixture 130 to firmly clamp the test piece.

[0065] For example, one end of the test piece is fixed by the fixing fixture 130, the other end is fixed by the tensile fixture 141, and the tensile rod 140 is slowly pulled downward by the tensile mechanism, thereby stretching the test piece and performing a hydrogen embrittlement test according to hydrogen embrittlement.

[0066] The fixing rod 131 and the tensile rod 140 can be realized by various existing forms of fixtures capable of inserting and firmly fixing the test piece.

[0067] Such as Figures 3 to 5As shown, the hydrogen embrittlement test device 100 with a heat exchanger according to an embodiment of the present invention may include a heat exchanger 150.

[0068] The heat exchanger 150 may exchange heat between hydrogen supplied into the interior of the test chamber 110 and a heat medium to adjust the temperature of the hydrogen, or may uniformly maintain the temperature of the hydrogen during the hydrogen embrittlement test.

[0069] The heat exchanger 150 may be located in the test space 111 to exchange heat with hydrogen in the test space 111, and a heat medium for heat exchange with hydrogen may be supplied to the heat exchanger 150.

[0070] Here, generally, in a hydrogen embrittlement test device, the heat exchanger 150 is located outside the test chamber 110, and hydrogen whose temperature state has been heat-exchanged is introduced into the test chamber 110. However, since the heat-exchanged hydrogen exchanges heat with the outside during movement through the drain pipe to the test chamber 110, it is difficult to uniformly maintain the temperature of the hydrogen due to the temperature change of the hydrogen, and there is a problem of a decrease in heat exchange efficiency due to heat loss during movement, and the temperature of the hydrogen cannot be quickly changed.

[0071] However, in the present invention, since the heat exchanger 150 is located inside the test chamber 110, heat exchange with hydrogen can be immediately performed, and not only can heat loss be minimized, but also heat exchange of the temperature of the hydrogen can be quickly performed.

[0072] The heat medium may also be a fluid or a gas.

[0073] The heat exchanger 150 may be formed with a medium supply port 151d for supplying the heat medium and a medium discharge port 151e for discharging the heat-exchanged heat medium, and the heat exchanger 150 may be a printed circuit type heat exchanger (Printed Circuit Heat Exchanger, PCHE) having a form in which a plurality of heat exchange plates 151 are overlapped and diffusion-bonded after flow paths 151a through which the heat medium passes are etched or ground on the plurality of heat exchange plates 151.

[0074] Among them, diffusion bonding is a form in which a plurality of heat exchange plates 151 are overlapped and pressurized at a preset pressure, and bonding is performed by diffusion of atoms on the bonding surface, so that the bonding property between the heat exchange plates 151 can be improved and leakage of the heat medium can be prevented.

[0075] Of course, the plurality of heat exchange plates 151 may be bonded to each other not only by diffusion bonding, but also fixed in a form in which fixing pins pass through the plurality of heat exchange plates 151 and nuts are tightened at the ends of the fixing pins, thereby preventing the plurality of heat exchange plates 151 from separating from each other.

[0076] In addition, when the heat exchanger 150 is implemented as a PCHE, since the required shape and size can be easily manufactured, small devices such as the hydrogen embrittlement test device 100 equipped with a heat exchanger in the embodiment can also be mounted through miniaturization.

[0077] In the heat exchanger 150, the medium supply port 151d is connected to the medium supply pipe 153, and the medium discharge port 151e is connected to the medium discharge pipe 155. Therefore, the heat medium can be supplied to the heat exchanger 150 from the outside of the test chamber 110, and the supplied heat medium can be discharged to the outside of the test chamber 110.

[0078] At this time, a medium pipe hole 163 can be formed through the lower part of the test chamber 110, and the medium discharge pipe 155 and the medium supply pipe 153 can be arranged through the medium pipe hole 163.

[0079] The heat exchanger 150 can be located above the test space 111, and a through hole 151c can be formed in the center of the heat exchanger 150, and the fixing rod 131 passes through the through hole 151c.

[0080] A plurality of heat exchange pins 151b can be formed to protrude from the heat exchange plate 151 of the heat exchanger 150 to improve the heat exchange with the outside.

[0081] On the other hand, the heat exchanger 150 can be formed in a cylindrical shape corresponding to the outer edge of the test space 111 as a whole.

[0082] The flow channel 151a formed in the heat exchange plate 151 is formed in a zigzag shape to improve the heat exchange. In the embodiment, the shape of the flow channel 151a and the heat exchange plate 151 is a shape in which a through hole 151c is formed in the center along the circumferential direction and is formed in a zigzag shape, and is formed in a circular shape as a whole, so that the heat exchange efficiency of the heat exchanger 150 can be improved.

[0083] For example, the heat exchange plate 151 is formed in a circular shape in a zigzag along the circumferential direction, and the flow channel 151a is formed along the zigzag shape of the heat exchange plate 151, so as to minimize the contact distance between the flow channel 151a through which the heat medium passes and the hydrogen for heat exchange, thereby improving the heat exchange.

[0084] At this time, the heat exchange pins 151b protrude from both sides of the heat exchange plate 151 formed in a zigzag shape, and a plurality of them can be formed along the shape of the heat exchange plate 151 formed in a zigzag shape.

[0085] In addition, a medium supply port 151d for supplying a heat medium is formed on one side of the heat exchange plate 151, and a medium discharge port 151e is formed in the opposite direction of the medium supply port 151d, such that the heat medium supplied through the medium supply port 151d is separated to both sides of the circumference, passes through the zigzag-shaped flow path 151a, and is discharged through the medium discharge port 151e located in the opposite direction.

[0086] As Figure 1 and Figure 3 shown, a hydrogen embrittlement test apparatus 100 equipped with a heat exchanger according to an embodiment of the present invention may include an outer container 170 and a lining 175.

[0087] The outer container 170 is formed in the shape of a container and can accommodate a test chamber 110 inside.

[0088] The outer container 170 can block hydrogen leaking from the test chamber 110 from leaking to the outside, and the outer container 170 can be formed in the shape of a container with an open lower part.

[0089] The upper part inside the outer container 170 is formed as a curved surface protruding upward, so that the pressure of hydrogen acts uniformly, thereby preventing partial pressure from concentrating on the outer container 170 and causing damage.

[0090] The outer container 170 can have a relatively thick thickness to be able to withstand the pressure of hydrogen supplied for the hydrogen embrittlement test.

[0091] Threads for thread-fastening a container lid 160 can be formed on the inner circumference of the lower part of the outer container 170.

[0092] The outer container 170 is arranged to be movable up and down by a driving mechanism, so that when a test piece is placed in the test chamber 110 or taken out from the test chamber 110, the outer container 170 can be lifted to the upper part of the test chamber 110 to expose the test chamber 110 to the outside, or in a state where it is lifted to the upper part of the test chamber 110, the outer container 170 can be moved downward to accommodate the test chamber 110.

[0093] The lining 175 has a container shape corresponding to the inner circumference of the outer container 170, can be assembled or joined in a manner of closely adhering to the inner circumference of the outer container 170, and the lining 175 can be formed of a material having hydrogen embrittlement resistance to prevent the outer container 170 from being damaged due to hydrogen embrittlement.

[0094] Of course, in addition to the container form, the lining 175 can also be configured in a form of coating a hydrogen embrittlement-resistant material inside the outer container 170.

[0095] As Figures 1 to 3 shown, a hydrogen embrittlement test apparatus 100 equipped with a heat exchanger according to an embodiment of the present invention may include a container lid 160.

[0096] The container lid 160 can seal the lower part of the opening of the external container 170.

[0097] The test chamber 110 can be disposed and provided on the upper part of the container lid 160, and the fastening lid 165 is rotatably provided along the outer edge of the container lid 160 for rotationally detaching the container lid 160. Threads for screwing fastening with the threads formed on the inner circumference of the lower part of the external container 170 can be formed on the outer edge of the outer side of the fastening lid 165.

[0098] The container lid 160 can be formed with a lid rod hole 161, and a tension rod 140 that moves up and down through a tension mechanism located below the container lid 160 passes through the lid rod hole 161. Medium pipe holes 163 can be respectively formed on the outer edge of the lid rod hole 161, and a medium supply pipe 153 and a medium discharge pipe 155 pass through the medium pipe holes 163.

[0099] In addition, the container lid 160 can be respectively formed with a hydrogen pipe hole 164, a hydrogen supply pipe 181 for supplying hydrogen to the test space 111 and a hydrogen discharge pipe 183 for discharging the supplied hydrogen pass through the hydrogen pipe hole 164.

[0100] A container seal can be provided in the container lid 160 where the container lid 160 overlaps with the external container 170. In a state where the container lid 160 seals the external container 170, the container seal is used to prevent hydrogen from leaking between the external container 170 and the container lid 160, and a pressure seal can be provided in the lid rod hole 161 of the container lid 160 for inserting the tension rod 140 that moves up and down. The pressure seal makes the tension rod 140 and the lid rod hole 161 airtight.

[0101] Of course, a lid seal for preventing hydrogen leakage can also be provided between the container lid 160 and the rotating fastening lid 165.

[0102] Among them, the container seal, the lid seal, and the pressure seal can be formed of a material with hydrogen embrittlement resistance, or can be formed of an elastic material or a metal.

[0103] As Figures 1 to 3 As shown, the hydrogen embrittlement test device 100 equipped with a heat exchanger according to an embodiment of the present invention can include a hydrogen supply pipe 181 and a hydrogen discharge pipe 183.

[0104] The hydrogen supply pipe 181 can supply hydrogen to the test space 111 so that the test piece generates hydrogen embrittlement.

[0105] A plurality of hydrogen supply pipes 181 can protrude into the test space 111 through the hydrogen pipe holes 164 of the container lid 160.

[0106] At this time, the hydrogen supply pipe 181 vertically penetrates the side heat insulation member 121, preventing the hydrogen supply pipe 181 from being exposed to the test space 111. A communication hole communicating with the test space 111 is formed in the side heat insulation member 121, so that the hydrogen supplied through the hydrogen supply pipe 181 can be provided to the test space 111 through the communication hole.

[0107] At the end of the hydrogen embrittlement test, the hydrogen discharge pipe 183 can discharge the hydrogen supplied to the test space 111 to the outside of the outer container 170. One end of the hydrogen discharge pipe 183 is located in the inner space of the outer container 170, and the other end of the hydrogen discharge pipe 183 is connected to an external hydrogen tank through the hydrogen pipe hole 164 of the container lid 160, so that the hydrogen supplied to the test space 111 can be recovered into the hydrogen tank through the outer container 170.

[0108] Of course, the hydrogen discharge pipe 183 passing through the container lid 160 can also pass through the side heat insulation member 121 so that one end thereof is located in the inner space of the outer container 170.

[0109] The functions and effects of the above-described components will be described.

[0110] In the hydrogen embrittlement test device 100 having a heat exchanger according to an embodiment of the present invention, a test space 111 for testing the hydrogen embrittlement of a test piece is formed inside the test chamber 110, and an entrance / exit 113 for putting the test piece into the test space 111 or taking the test piece out of the test space 111 is formed through the outer edge of the test chamber 110.

[0111] The test space 111 of the test chamber 110 can be insulated by the heat insulation member 120, and the heat insulation member 120 can insulate the test space 111 in a form in which the upper heat insulation member 123, the side heat insulation member 121, and the lower heat insulation member 125 are assembled with each other. The upper heat insulation member 123 insulates the upper part of the test chamber 110, a plurality of the side heat insulation members 121 are assembled and insulate the outer edge of the test chamber 110, and the lower heat insulation member 125 insulates the lower part of the test chamber 110.

[0112] At this time, the side heat insulation member 121 corresponding to the entrance / exit 113 of the test chamber 110 is detachably coupled to the entrance / exit 113, so that the test space 111 can be opened and closed.

[0113] On the other hand, a rod support portion 119 for fixing the test piece by the fixing jig 130 is provided in the upper part of the test chamber 110, and the rod support portion 119 is configured in a form in which a plurality of support bosses 119a are coupled to a boss plate 119b.

[0114] The fixing jig 130 may be located inside the test space 111. One end of the fixing rod 131 is coupled to the fixing jig 130, and the other end of the fixing rod 131 is disposed through the upper rod hole 115 of the test chamber 110 and the boss plate 119b. A rod adjusting member 133 is coupled to the end of the fixing rod 131 passing through the boss plate 119b. The rod adjusting member 133 is threadedly fastened to the fixing rod 131 and adjusts the position of the fixing rod 131 in the test space 111 when rotated.

[0115] In the lower part of the test chamber 110, a tensile rod 140 for applying a tensile force to the test piece for testing is located in the test space 111 through the lower rod hole 117 of the test chamber 110. A tensile jig 141 for fixing the test piece together with the fixing jig 130 is provided at the end of the tensile rod 140 located in the test space 111.

[0116] In addition, the end of the tensile rod 140 in the opposite direction to the coupled tensile jig 141 is connected to a tensile mechanism that provides a tensile force to the tensile rod 140 to stretch the test piece.

[0117] A heat exchanger 150 for heat-exchanging the heat of the hydrogen supplied to the test space 111 with the heat of the heat medium is provided in the test space 111. The heat exchanger 150 is formed by diffusion bonding in a state where a plurality of heat exchange plates 151 are overlapped and laminated. The heat exchange plates 151 are formed with flow channels 151a by etching or grinding.

[0118] The heat exchange plate 151 is generally circular. A medium supply port 151d for supplying the heat medium is formed on one side of the circumference, and a medium discharge port 151e for discharging the heat medium is formed on the other side. The heat exchange plate 151 is formed in a zigzag shape along the circumferential direction from the medium supply port 151d to the medium discharge port 151e.

[0119] In addition, the flow channels 151a of the heat exchange plate 151 in the zigzag shape are also formed in a zigzag shape in the circumferential direction along the shape of the heat exchange plate 151, and heat exchange pins 151b are formed to protrude along the zigzag shape of the heat exchange plate 151 to increase the contact area for improving the heat exchange with hydrogen.

[0120] In the heat exchanger 150, a medium supply pipe 153 for supplying the heat medium extends downward to the lower part of the medium supply port 151d, and a medium discharge pipe 155 for discharging the heat medium after heat exchange in the heat exchanger 150 extends downward to the lower part of the medium discharge port 151e.

[0121] The test chamber 110 may be inserted inside an outer container 170 with a lower opening, and a lining 175 for preventing hydrogen embrittlement of the outer container 170 is provided on the inner circumference of the outer container 170.

[0122] The lower part of the opening of the outer container 170 is sealed by the container lid 160. The fastening lid 165 is rotatably coupled to the container lid 160, and the fastening lid 165 is coupled to the thread formed on the lower inner circumference of the outer container 170 in a form of screw fastening.

[0123] A lid rod hole 161 is formed through the center of the container lid 160 so that the tension rod 140 can be slidably coupled up and down. The lid rod hole 161 and the tension rod 140 are made airtight by a rod seal, and the container lid 160 and the fastening lid 165 are made airtight by a lid seal.

[0124] In addition, the outer container 170 can be moved up and down from the container lid 160 by a driving mechanism to expose the test chamber 110 provided in the container lid 160 to the outside, or to insert the test chamber 110 into the inside of the outer container 170 and seal it.

[0125] On the other hand, the medium supply pipe 153 and the medium discharge pipe 155 of the heat exchanger 150 pass through the respective medium pipe holes 163 of the container lid 160 and are located at the lower part. The medium supply pipe 153 is connected to a medium supply tank that supplies a heat medium, and the medium discharge pipe 155 is also connected to the medium supply tank, so that after heating or cooling the heat medium, it can be supplied by circulating the heat exchanger 150 and the medium supply tank.

[0126] In addition, in each hydrogen pipe hole 164 formed in the container lid 160, a hydrogen supply pipe 181 for supplying hydrogen from a hydrogen supplier to the test space 111 and a hydrogen discharge pipe 183 for discharging the hydrogen supplied to the outer container 170 to the outside are connected.

[0127] The hydrogen supply pipe 181 can supply hydrogen stored in a hydrogen storage tank to the test space 111 at a preset pressure by the pressure of a hydrogen supply pump. When the hydrogen embrittlement test is completed in a state where hydrogen is supplied to the test space 111, the hydrogen supply pipe 181 can suck the hydrogen inside the outer container 170 through the hydrogen supply pump and circulate it to the hydrogen storage tank to prevent hydrogen leakage.

[0128] Regarding the hydrogen embrittlement test apparatus 100 having a heat exchanger according to an embodiment of the present invention like this, after rotating the fastening lid 165 to release the fixation between the outer container 170 and the container lid 160 and exposing the test chamber 110 to the outside, the driving mechanism is operated to lift the outer container 170 upward.

[0129] When the outer container 170 is lifted upward so that the test chamber 110 is exposed to the outside, in order to open the entrance 113 of the test chamber 110, after separating the side heat insulation member 121 that closes the entrance 113 to open the experimental space 111, the test piece is assembled between the fixed jig 130 and the tension jig 141.

[0130] At this time, the rod adjustment component 133 located at the upper part of the test chamber 110 can be rotated according to the length of the test piece, and the interval between the stretching clamp 141 and the fixing clamp 130 can be adjusted by adjusting the height of the fixing rod 131 through threaded tightening, and then the test piece can be set between the fixing clamp 130 and the stretching clamp 141.

[0131] On the other hand, when the test piece is set between the fixing fixture 130 and the tensile fixture 141, in order to insulate the test space 111, the outer container 170 is moved downward by the driving mechanism while the opening entrance 113 of the test chamber 110 is covered and sealed by the side insulation component 121.

[0132] When the outer container 170 moves to the lower part, the test chamber 110 is inserted into the inner part of the outer container 170, and when the outer container 170 is sealed by the container cover 160, the fastening cover 165 is rotated by the driving mechanism to fasten and fix the outer container 170 and the container cover 160.

[0133] In this state, when hydrogen is supplied through the hydrogen supply pipe 181 , hydrogen is filled into the interior of the test chamber 110 and is supplied to the test space 111 at a preset pressure.

[0134] At this time, even if hydrogen is supplied to the test space 111 , the hydrogen can be prevented from leaking to the outside because it is sealed by the outer container 170 , and the liner 175 is provided inside the outer container 170 , so that the outer container 170 can be prevented from generating hydrogen embrittlement.

[0135] In addition, when hydrogen is supplied to the test space 111, when it is necessary to maintain the hydrogen in the test chamber 110 at a uniform temperature or to change the temperature of the hydrogen, a preheated or cooled heat medium is supplied through the medium supply pipe 153 and supplied through the medium supply port 151d of the heat exchanger 150.

[0136] The heat medium supplied through the medium supply port 151d circulates through the flow channel 151a of the heat exchange plate 151 and exchanges heat with hydrogen to change the temperature of the hydrogen, and then circulates through the medium discharge port 151e of the heat exchange plate 151 and is discharged to the outside through the medium discharge pipe 155, thereby adjusting the temperature of the hydrogen.

[0137] At this time, the heat exchange plate 151 is formed in a zigzag shape in the circumferential direction, and the flow channel 151e also passes in a zigzag shape along the shape of the heat exchange plate 151 in the circumferential direction to perform heat exchange, and since the outer edge of the heat exchange plate 151 is protruding with a heat exchange pin 151b that increases the contact area to improve the heat exchange performance, the heat medium can move in the optimal form corresponding to the internal shape of the test chamber 110 and perform heat exchange.

[0138] In addition, in order to perform the hydrogen embrittlement test of the test piece while maintaining the temperature of hydrogen uniform or changing the temperature of the heat medium passing through the heat exchanger 150, a tensile force is applied to the test piece in such a form that the tensile rod 140 is pulled downward by the tensile mechanism.

[0139] When a tensile force is applied to the test piece, the test piece is tested in such a form that the tensile force applied to the test piece due to hydrogen embrittlement is measured or observed.

[0140] When the hydrogen embrittlement test of the test piece is completed, in order to prevent the hydrogen filled inside the external container 170 from leaking, the hydrogen supplied to the inside of the external container 170 can be discharged to the outside of the external container 170 through the hydrogen discharge pipe 183. When the hydrogen discharge is completed, the fastening cover 165 can be rotated by the driving mechanism to release the fixing of the container cover 160 from the external container 170. In a state where the external container 170 is lifted upward so that the test chamber 110 is exposed to the outside, the test of the test piece according to hydrogen embrittlement is ended in such a form that the side heat insulation member 121 covering the entrance 113 is separated and the tested test piece is removed.

[0141] Of course, the test can also be performed in such a form that the structure of the specimen collected after the test is observed through a micro-microscope.

[0142] Therefore, with respect to the hydrogen embrittlement test device 100 having a heat exchanger according to an embodiment of the present invention, the heat exchanger 150 is provided inside the test chamber 110, so that the temperature of the hydrogen filled inside the test chamber 110 can be uniformly maintained or changed. Therefore, not only can the heat loss caused by heat exchange be minimized, but also the temperature of hydrogen can be quickly adjusted and the hydrogen embrittlement test can be performed.

[0143] In addition, by configuring the heat exchanger 150 in a form in which flow channels 151a are formed in the heat exchange plates 151 and a plurality of heat exchange plates 151 are laminated and diffusion-bonded, not only can the volume of the heat exchanger 150 be minimized and the heat exchanger 150 be provided inside the relatively small test space 111, but also the shape of the heat exchange plates 151 can be easily manufactured into various forms. Therefore, the heat exchanger 152 can be manufactured into a shape with the best heat exchange efficiency according to the shape of the test space 111.

[0144] In addition, a rod support portion 119 for supporting the fixing jig 130 is provided above the test chamber 110. Therefore, there is no need to provide an external frame for fixing the fixing jig 130, and thus the size of the equipment can be minimized.

[0145] In addition, since the test chamber 110 is provided inside the external container 170, not only can the leakage of hydrogen be blocked, but also high-pressure hydrogen can be supplied. Moreover, since a lining 175 is provided inside the external container 170, the external container 170 can be prevented from being damaged due to hydrogen embrittlement.

[0146] The embodiments of the present invention have been described above, but the scope of the rights of the present invention is not limited thereto, and should include all changes and modifications within the scope that can be easily changed and considered equivalent by those of ordinary skill in the art through the embodiments of the present invention.

[0147] Description of Reference Numerals

[0148] 100: Hydrogen embrittlement test device 110: Test chamber

[0149] 111: Test space 113: Entrance / exit

[0150] 115: Upper rod hole 117: Lower rod hole

[0151] 119: Rod support part 119a: Support boss

[0152] 119b: Boss plate 120: Heat insulation component

[0153] 121: Side heat insulation component 123: Upper heat insulation component

[0154] 125: Lower heat insulation component 130: Fixing fixture

[0155] 131: Fixing rod 133: Rod adjusting component

[0156] 140: Tensile rod 141: Tensile fixture

[0157] 150: Heat exchanger 151: Heat exchange plate

[0158] 151a: Flow channel 151b: Heat exchange pin

[0159] 151c: Through part 151d: Medium supply port

[0160] 151e: Medium discharge port 153: Medium supply pipe

[0161] 155: Medium discharge pipe 160: Container cover

[0162] 161: Cover rod hole 163: Medium pipe hole

[0163] 164: Hydrogen pipe hole 165: Fastening cover

[0164] 170: Outer container 175: Inner lining

[0165] 181: Hydrogen supply pipe 183: Hydrogen discharge pipe

Claims

1. A hydrogen embrittlement test device equipped with a heat exchanger, characterized in that, Comprising: A test chamber into which hydrogen is supplied to a test space formed inside; A fixing jig for fixing a test piece placed inside the test chamber; A stretching rod for stretching the test piece fixed to the fixing jig; And A heat exchanger provided inside the test chamber for heat-exchanging hydrogen with a heat medium to adjust the temperature of hydrogen by heat-exchanging the hydrogen supplied to the inside of the test chamber with the heat medium.

2. The hydrogen embrittlement test device equipped with a heat exchanger according to claim 1, characterized in that, In the heat exchanger, a flow path through which the heat medium passes is formed in a heat exchange plate by grinding or etching, and a plurality of the heat exchange plates are laminated and diffusion-bonded.

3. The hydrogen embrittlement test device equipped with a heat exchanger according to claim 2, characterized in that, The heat exchange plate includes: Heat exchange pins protruding to the outside to enhance heat exchange with the hydrogen.

4. The hydrogen embrittlement test device equipped with a heat exchanger according to claim 2, characterized in that, The heat exchanger has an overall circular shape to be accommodated in the test space, The flow path and the heat exchange plate are formed in a zigzag shape along the inner circumferential direction of the test space and have an overall circular shape.

5. The hydrogen embrittlement test device equipped with a heat exchanger according to claim 1, characterized in that, Comprising: An outer container that houses the test chamber inside and blocks the leakage of hydrogen supplied to the test chamber to the outside while withstanding the pressure of the hydrogen to supply the hydrogen at a preset pressure.

6. The hydrogen embrittlement test device equipped with a heat exchanger according to claim 5, characterized in that, Comprising: A lining having hydrogen embrittlement resistance and overlapping on the inner circumference of the outer container to prevent the outer container from being damaged due to hydrogen embrittlement.

7. The hydrogen embrittlement test device equipped with a heat exchanger according to claim 1, characterized in that, Comprising: A heat insulation member surrounding the outer edge of the test space in the test chamber to insulate the test space.

8. The hydrogen embrittlement test device equipped with a heat exchanger according to claim 1, characterized in that, The test chamber includes: A rod support portion that supports the fixing jig on the test chamber.

9. The hydrogen embrittlement test device equipped with a heat exchanger according to claim 1, characterized in that, The test chamber includes: An entrance / exit penetrating the side surface of the test chamber and communicating with the test space to put a test piece into the inside of the test chamber and take out the test piece from the inside of the test chamber.

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