JP3692320B2 - Cylindrical product leak inspection device and leak inspection seal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a leak inspection apparatus for a cylindrical product and a seal apparatus for leak inspection.
[0002]
[Prior art]
Here, a leak inspection apparatus for a cylindrical solid oxide fuel cell will be described as an example of a cylindrical product. As shown in FIG. 7, a cylindrical solid electrolyte fuel cell 38 has a dense membrane (fuel electrode 51, electrolyte 52, interface) made of various materials on the outer peripheral surface of a porous ceramic tube (base tube) 33. A connector 53 and an air electrode 54) are formed.
[0003]
When the denseness of the membrane is insufficient, the operation as a fuel cell is also insufficient. From this, a leak inspection is performed for each of the cylindrical solid oxide fuel cells. A conventional leak inspection method is shown in FIG.
[0004]
In FIG. 8, the code | symbol 38 has shown the fuel cell by which the fuel electrode 51, the electrolyte 52, the interconnector 53, and the air electrode 54 are formed into a film by the base tube 33 (refer FIG. 7). On the outer periphery of the fuel cell 38, O-rings 141 are mounted on both sides in order to seal the inspection area 38 a of the fuel cell 38. Further, a jig (flange) 142 for hermetically supporting the O-ring 141 on the outer peripheral surface of the fuel cell 38 is mounted. The flanges 142 are provided with a sealed container 143 for sealing the region to be inspected 38a. The sealed container 143 is provided with an air inlet 144 for introducing air into the interior 143a and an air outlet 145 for discharging air from the interior 143a.
[0005]
In the leak inspection, first, air is introduced from the air introduction port 144 into the inside 143a of the sealed container 143 with the air discharge port 145 closed. The pressure of the air in the interior 143a is set to a predetermined value. Next, hydrogen gas (fuel) is introduced from one side into the hollow portion 38b of the fuel battery cell 38a and exhausted from the other side. The pressure of the fuel gas in the hollow portion 38b is set to be higher than the air pressure (the predetermined value) in the inside 143a of the sealed container 143.
[0006]
At this time, if the above-described denseness of the inspected region 38a of the fuel cell 38 is insufficient, hydrogen in the hollow portion 38b passes through the inspected region 38a of the fuel cell 38 and enters the inside 143a of the sealed container 143. Leak (see arrow A). Thereafter, the air in the interior 143a is discharged from the air discharge port 145, and the amount (ratio) of hydrogen contained in the air is detected, whereby the above-described denseness test of the fuel cell 38 is performed.
[0007]
[Problems to be solved by the invention]
In the conventional leak inspection apparatus, it is necessary to manually attach the O-ring 141, the flange 142, etc. to each fuel cell 38. Therefore, a lot of time is required for the inspection, which has been an obstacle to mass production of cylindrical products.
[0008]
An object of the present invention is to provide a leak inspection apparatus for a cylindrical product and a seal apparatus for leak inspection that can perform a leak inspection of a cylindrical product in a short time.
[0009]
[Means for Solving the Problems]
[Means for Solving the Problems] will be described below using the numbers and symbols used in [Embodiments of the Invention]. These numbers and symbols are added to clarify the correspondence between the description of [Claims] and the description of [Mode for carrying out the invention]. It should not be used to interpret the technical scope of the described invention.
[0010]
A cylindrical product leak inspection seal device (10) according to the present invention is a leak inspection seal device (10) used for a leak inspection of a cylindrical product (38), the leak inspection seal device (10). Is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the cylindrical product (38), and the inner peripheral surface of the leak test sealing device (10) has a hollow elastic member (12). The elastic member (12) is provided with an opening for introducing or discharging a fluid in the interior, and the elastic member is introduced when the fluid is introduced into the interior through the opening. (12) bulges out and adheres to the outer periphery of the cylindrical product (38).
[0011]
The leak inspection seal device (10) of the present invention further includes an annular or cylindrical support member (13) provided on an outer peripheral portion of the elastic member (12), and the support member (13) The elastic member (12) is provided to prevent the elastic member (12) from bulging in a direction away from the outer peripheral portion of the cylindrical product (38) when the fluid is introduced therein.
[0012]
The leak inspection seal device (10C) of the present invention is a leak inspection seal device (10C) used for a leak inspection of a cylindrical product (39), and the leak inspection seal device (10C) is the cylinder. It is formed in a cylindrical shape having an outer diameter smaller than the inner diameter of the mold product (39), and an outer peripheral surface of the leak test sealing device (10C) is provided with a hollow elastic member (19f) inside, The elastic member (19f) is provided with an opening for introducing or discharging a fluid into the inside, and the elastic member (19f) is expanded when the fluid is introduced into the inside through the opening. It comes out and comes into close contact with the inner periphery of the cylindrical product (39).
[0013]
The cylindrical product leak inspection apparatus according to the present invention is a cylindrical product leak inspection apparatus that performs a leak inspection of a cylindrical product (38), and the cylindrical product (38) is disposed inside (41a) thereof. And a second fluid different from the first fluid put into the inner periphery (38b) of the cylindrical product (38) is introduced into the inside (41a) of the sealed container (41) / For leak inspection for sealing the outer peripheral portion of the cylindrical product (38) with respect to the fluid introduction / discharge portion (41b, 41c) for discharging and the inside (41a) of the sealed container (41) The leak inspection seal device (10) is formed in a cylindrical shape having an inner diameter larger than the outer diameter of the cylindrical product (38), and includes the seal device (10). The inner peripheral surface of the inside is hollow The elastic member (12) is provided with an opening for introducing or discharging a fluid into the inside, and the fluid is introduced into the inside through the opening. When this occurs, the elastic member (12) swells and comes into close contact with the outer periphery of the cylindrical product (38).
[0014]
In the leak inspection apparatus for a cylindrical product according to the present invention, the leak inspection seal apparatus (10) further includes an annular or cylindrical support member (13) provided on an outer peripheral portion of the elastic member (12). The support member (13) prevents the elastic member (12) from bulging away from the outer peripheral portion of the cylindrical product (38) when the fluid is introduced into the inside. It is provided to do.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a leak inspection apparatus for a cylindrical product according to the present invention will be described below with reference to the accompanying drawings.
[0016]
The cylindrical product leak inspection apparatus according to the present embodiment is obtained by forming a fuel electrode, an electrolyte, an interconnector, and an air electrode on a base tube (ceramic tube) of a cylindrical solid electrolyte fuel cell (FIG. 7). Against.
[0017]
The structure of the fuel cell is shown in FIG. As shown in FIG. 7, the fuel cell 38 includes a base tube 33, a fuel electrode 51, an electrolyte 52, an interconnector 53, and an air electrode 54.
[0018]
The cylindrical ceramic product leak inspection apparatus according to the present embodiment is applied to each of all the fuel cells 38 at room temperature as part of quality control after the fuel cells 38 are manufactured.
[0019]
(First embodiment)
FIG. 1 is a side sectional view showing a main part of a leak inspection apparatus for a cylindrical product according to the first embodiment. In FIG. 1, reference numeral 10 denotes a sealing device. The sealing device 10 seals the outer peripheral portion of the fuel battery cell 38.
[0020]
FIG. 2 is a side sectional view schematically showing the overall configuration of the cylindrical product leak inspection apparatus according to the first embodiment. As shown in FIG. 2, the sealing device 10 is attached to each of both ends of the fuel cell 38 in the longitudinal direction.
[0021]
As shown in FIG. 2, the sealing device 10 is mounted to seal between the region to be inspected 38 a of the fuel cell 38 and the longitudinal end portion side of the fuel cell 38. Reference numeral 21 a is a fuel supply pipe for supplying fuel (hydrogen) to the hollow part 38 b of the fuel cell 38, and reference numeral 21 b is for discharging fuel (hydrogen) to the hollow part 38 b of the fuel cell 38. It is a fuel discharge pipe. Reference numeral 22 denotes a grip member provided integrally with the fuel supply pipe 21a or the fuel discharge pipe 21b. The sealing device 10 is held by the grip member 22 in a state where each of the fuel supply pipe 21a and the fuel discharge pipe 21b and the hollow portion 38b of the fuel cell 38 are airtightly connected.
[0022]
The fuel cell 38, the sealing device 10, the fuel supply pipe 21 a, the fuel discharge pipe 21 b, and the grip member 22 are accommodated in the hermetic container 41 in a state where airtightness is maintained. The sealed container 41 is provided with an air inlet 41b for introducing air into the interior 41a and an air outlet 41c for discharging air from the interior 41a.
[0023]
In the leak inspection, first, air is introduced from the air introduction port 41b into the inside 41a of the sealed container 41 with the air discharge port 41c closed. The pressure of the air inside the interior 41a is set to a predetermined value. Next, hydrogen gas (fuel) is introduced into the hollow portion 38b of the fuel battery cell 38a from the fuel supply pipe 21a and exhausted from the fuel discharge pipe 21b. The pressure of the fuel gas in the hollow portion 38b is set higher than the air pressure (the predetermined value) in the inside 41a of the sealed container 41.
[0024]
At this time, if the above-mentioned denseness of the inspected region 38a of the fuel cell 38 is insufficient, hydrogen in the hollow portion 38b passes through the inspected region 38a of the fuel cell 38 and enters the inside 41a of the sealed container 41. Leak. Thereafter, the air in the interior 41a is discharged from the air discharge port 41c, and the above-described denseness test of the fuel cell 38 is performed by detecting (gas chromatography) the amount (ratio) of hydrogen contained in the air.
[0025]
Next, the configuration of the sealing device 10 will be described with reference to FIG.
[0026]
The sealing device 10 includes a first rubber (elastic) member 11, a second rubber (elastic) member 12, and an annular member 13.
[0027]
Each of the first rubber member 11 and the second rubber member 12 is formed in a cylindrical shape having the same height. Each of the first rubber member 11 and the second rubber member 12 has a hollow interior. The air expands when air is introduced into the second rubber member 12. When air is introduced into the second rubber member 12 and the second rubber member 12 expands, the first rubber member 11 in close contact with the seal device 10 is pressed from the outside, and the fuel cell 38 is sealed.
[0028]
The outer peripheral surface of the first rubber member 11 and the inner peripheral surface of the second rubber member 12 are joined.
[0029]
The inner diameter of the first rubber member 11 is formed larger than the outer diameter of the fuel battery cell 38. The inner peripheral surface of the first rubber member 11 is in contact with the outer peripheral surface of the fuel battery cell 38.
[0030]
On the outer peripheral surface of the second rubber member 12, an opening for introducing / extracting air is formed. An annular member 13 is fixedly attached to the outer peripheral surface of the second rubber member 12 with an adhesive.
[0031]
The annular member 13 is formed of a metal such as stainless steel (SUS). The annular member 13 is formed with an opening 13a penetrating in the radial direction.
[0032]
The annular member 13 has a base portion 13b and an edge portion 13c. The base portion 13 b is formed in a thin cylindrical shape whose height is equal to that of the first rubber member 11 and the second rubber member 12. The edge portion 13c is provided so as to protrude outward from the central portion in the height direction of the base portion 13b, and the height dimension thereof is smaller than that of the first rubber member 11 and the second rubber member 12, and is formed thick. . The opening 13a is formed at the center in the height direction of the edge 13c.
[0033]
When air is supplied from the outside into the second rubber member 12 through the opening 13a of the annular member 13, the air is introduced into the second rubber member 12, and the second rubber member 12 expands. The air is supplied at a predetermined pressure (2 Kg / cm ² ). Since the outer peripheral side of the second rubber member 12 is pressed by the annular member 13, when the second rubber member 12 swells, the inner peripheral surface of the first rubber member 11 is in close contact with the outer peripheral surface of the fuel cell 38. Thereby, the fuel battery cell 38 is sealed.
[0034]
In the sealing device 10, the double rubber member of the first rubber member 11 and the second rubber member 12 is used. However, the double rubber member is not necessarily required to be double, and can be constituted by a single rubber member. .
[0035]
The grip member 22 is movable in the left-right direction in FIG. 2 according to the length of the fuel cell 38 so as to be compatible with a plurality of types of fuel cells 38 having different lengths (arrows in FIG. 2). reference).
[0036]
According to the first embodiment, the seal device 10 is attached to the fuel cell 38 in a state where the first rubber member 11 and the second rubber member 12 are not expanded, and then air is supplied through the opening 13a. And since it fulfills the sealing function, it is superior in workability and requires less work time. When removing the sealing device 10 from the fuel cell 38, air is discharged from the opening 13 a and the close contact state between the inner peripheral surface of the first rubber member 11 and the outer peripheral surface of the fuel cell 38 is released.
[0037]
(Second Embodiment)
Next, a second embodiment will be described with reference to FIG.
[0038]
In the second embodiment, a sealing device 10A is used instead of the sealing device 10 of the first embodiment. The sealing device 10 </ b> A includes a rubber member 11 </ b> A and an annular member 14.
[0039]
The rubber member 11A is formed in a cylindrical shape. The inside of the rubber member 11A is formed hollow. The inner diameter of the rubber member 11 </ b> A is formed larger than the outer diameter of the fuel battery cell 38.
[0040]
The annular member 14 includes an annular member main body 14a, a first metal member 14b, a thin rubber member 14c, and a second metal member 14d.
[0041]
The annular member main body 14a is formed in a cylindrical shape made of rubber, and an edge portion 14e provided so as to protrude outward is formed at the center in the height direction. A through hole 14f that penetrates the radial direction of the annular member main body 14a is formed in the edge portion 14e.
[0042]
The first metal member 14b is formed of a metal such as stainless steel (SUS). The first metal member 14b is provided so as to continuously cover a part of the inner peripheral surface, the upper and lower surfaces, and the outer peripheral surface of the annular member main body 14a.
[0043]
The thin rubber member 14c is provided outside the first metal member 14b so as to continuously cover the inner peripheral surface, the upper and lower surfaces, and the outer peripheral surface of the annular member main body 14a.
The second metal member 14d is formed of a metal such as stainless steel (SUS). The second metal member 14d is provided outside the thin rubber member 14c so as to press the thin rubber member 14c against a portion of the outer peripheral surface of the annular member main body 14a that is not covered with the first metal member 14b.
[0044]
The first metal member 14b is provided with a through hole at the same position as the through hole 14f. Thereby, the air introduced from the outside through the through hole 14f passes through the through hole of the first metal member 14b and is introduced into the thin rubber member 14c. When air is introduced into the thin rubber member 14c, the thin rubber member 14c and the rubber member 11A expand. When the rubber member 11A swells, the sealing device 10A seals the outer peripheral surface of the fuel cell 38.
[0045]
(Third embodiment)
Next, a third embodiment will be described with reference to FIGS.
[0046]
FIG. 4A is a side sectional view showing a state in which the sealing device according to the third embodiment is attached to the fuel cell. 4 (b) and 4 (c) are exploded views of the state shown in FIG. 4 (a).
[0047]
In 3rd Embodiment, it replaces with the sealing apparatus 10 of 1st Embodiment, and the sealing apparatus 10B is used. The sealing device 10 </ b> B includes an O-ring 15 provided on the outer peripheral portion of the fuel battery cell 38, a rubber member 16, and an annular member 17.
[0048]
As shown in FIG. 4 (c), when the sealing device 10 </ b> B is attached, first, the O-ring 15 is attached to the outer peripheral portion of the fuel cell 38.
[0049]
The rubber member 16 is formed in a cylindrical shape. The rubber member 16 has a hollow interior and swells when air is introduced into the rubber member 16.
[0050]
The inner diameter of the rubber member 16 is formed larger than the outer diameter of the fuel battery cell 38. The inner peripheral surface of the rubber member 16 is in contact with the O-ring 15.
When air is introduced into the rubber member 16 and the rubber member 16 expands as shown in FIG. 4A, the O-ring 15 attached to the sealing device 10B is pressed from the outside, and the rubber member 16 The O-ring 15 is in close contact. Thereby, the fuel cell 38 is sealed.
[0051]
On the outer peripheral surface of the rubber member 16, an opening for introducing / extracting air is formed. An annular member 17 is fixedly attached to the outer peripheral surface of the rubber member 16 with an adhesive.
[0052]
The annular member 17 is made of a metal such as stainless steel (SUS). The annular member 17 has an opening 17a penetrating in the radial direction. The opening 17a of the annular member 17 and the opening of the rubber member 16 are provided so that their positions coincide with each other.
[0053]
The annular member 17 has a base portion 17b and an edge portion 17c. The base portion 17 b is formed in a thin cylindrical shape whose height is equal to that of the rubber member 16. The edge portion 17c is provided so as to protrude outward from the central portion in the height direction of the base portion 17b, and the height dimension thereof is smaller than that of the rubber member 16 and is formed thick. The opening 17a is formed at the center in the height direction of the edge 17c.
[0054]
When air is supplied from the outside into the rubber member 16 through the opening 17a of the annular member 17, the air is introduced into the rubber member 16 and the rubber member 16 expands. The air is supplied at a predetermined pressure (2 Kg / cm ² ). Since the outer peripheral side of the rubber member 16 is pressed by the annular member 17, when the rubber member 16 expands, the inner peripheral surface of the rubber member 16 comes into close contact with the outer peripheral surfaces of the O-ring 15 and the fuel cell 38. Thus, the fuel battery cell 38 is sealed.
[0055]
As shown in FIG. 4B, an edge 18 having an enlarged diameter made of rubber is formed at the end in the height direction of the sealing device 10B. The edge portion 18 of the sealing device 10B ensures hermeticity when the fuel supply pipe 21a or the fuel discharge pipe 21b and the hollow portion 38b of the fuel battery cell 38 are hermetically connected (held by the grip member 22). . The rubber edge 18 may be integral with the rubber member 16, and when the air is introduced into the rubber member 16 and the rubber member 16 expands, the edge 18 may also expand simultaneously. Thereby, the airtightness of the connection part of the fuel supply pipe 21a or the fuel discharge pipe 21b and the hollow part 38b of the fuel cell 38 is ensured.
[0056]
(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS. 5 and 6.
[0057]
FIG. 5 is a side view showing the overall configuration of the cylindrical product leak inspection apparatus according to the fourth embodiment, showing a state before air introduction. FIG. 6 is a side view showing the overall configuration of the cylindrical product leak inspection apparatus according to the fourth embodiment, and shows a state after air introduction.
[0058]
The sealing device 10C of the fourth embodiment seals the inner peripheral portion of the cylindrical workpiece 39, unlike the sealing devices of the first to third embodiments that seal the outer peripheral portion of the fuel cell 38.
[0059]
As shown in FIG. 6, the sealing device 10 </ b> C is mounted for sealing between a region to be inspected 39 a of the cylindrical workpiece 39 and a longitudinal end portion (opening) of the cylindrical workpiece 39.
[0060]
The sealing device 10 </ b> C is fixed in a state where airtightness is maintained in the sealed container 44. The sealed container 44 is provided with an air introduction / discharge pipe 44b for introducing air into the interior 44a and discharging the air inside the interior 44a.
[0061]
The sealing device 10C is provided with a device main body 19a that is formed in a generally cylindrical shape, and a double pipe is provided in a hollow portion of the device main body 19a. The double pipe inner pipe 19b opens into the hollow portion 39b of the cylindrical workpiece 39, and is used for supplying and discharging a test gas (for example, fuel gas (hydrogen)) from the outside. The double tube outer tube 19 c includes an opening 19 d that opens to the outer peripheral surface of the apparatus main body 19 a outside the sealed container 44, and an opening that opens to the outer peripheral surface of the apparatus main body 19 a outside the sealed container 44. 19e.
[0062]
A rubber hollow body 19f is provided in the entire circumferential direction at a position covering the opening 19e at the outer peripheral portion located inside the sealed container 44 of the apparatus main body 19a. When air is introduced from the outside through the opening 19d, the outer tube 19c, and the opening 19e, the rubber hollow body 19f swells outward in the radial direction of the apparatus main body 19a and closely contacts the inner peripheral surface of the cylindrical workpiece 39. . Thereby, the cylindrical workpiece 39 is sealed.
[0063]
In the leak inspection, first, air is introduced from the air introduction / discharge pipe 44b into the inside 44a of the sealed container 44. The air pressure in the interior 44a is set to a predetermined value.
Next, hydrogen gas (fuel) is supplied from the inner tube 19 b to the hollow portion 39 b of the cylindrical workpiece 39. In this case, as shown in FIG. 6, hydrogen gas is supplied from both of the inner pipes 19b of the pair of left and right sealing devices 10C, and the hollow portion 39b is pressurized to a set pressure. The pressure of the fuel gas in the hollow portion 39b is set higher than the air pressure (the predetermined value) in the inside 44a of the sealed container 44.
[0064]
At this time, if the denseness (or airtightness) of the inspected area 39a of the cylindrical work 39 is insufficient, the hydrogen gas in the hollow portion 39b passes through the inspected area 39a of the cylindrical work 39 and is sealed. 44 leaks into the interior 44a. Thereafter, the air in the interior 44a is discharged from the air introduction / discharge pipe 44b, and the amount (ratio) of hydrogen contained in the air is detected, whereby the above-described denseness inspection of the cylindrical workpiece 39 is performed.
[0065]
【The invention's effect】
According to the leak inspection apparatus for a cylindrical product of the present invention, the leak inspection can be performed in a short time.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a main part of a first embodiment of a leak inspection apparatus for a cylindrical product according to the present invention.
FIG. 2 is a side sectional view schematically showing an overall configuration of a first embodiment of a leak inspection apparatus for a cylindrical product according to the present invention.
FIG. 3 is a side sectional view showing a main part of a second embodiment of the leak inspection apparatus for a cylindrical product according to the present invention.
FIG. 4 (a) is a side sectional view showing a state in which a sealing device according to a third embodiment of the leak inspection device for a cylindrical product of the present invention is mounted on a fuel cell. 4 (b) and 4 (c) are exploded views of the state shown in FIG. 4 (a).
FIG. 5 is a side view showing a state before supplying air in the third embodiment of the leak inspection apparatus for cylindrical products of the present invention.
FIG. 6 is a side view showing a state after supplying air in the third embodiment of the leak inspection apparatus for cylindrical products according to the present invention.
FIG. 7 is a side view showing the structure of a fuel cell to be inspected in the first to third embodiments of the leak inspection apparatus for cylindrical products according to the present invention.
FIG. 8 is a side view for explaining a conventional cylindrical product leak inspection method;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Seal apparatus 10A Seal apparatus 10B Seal apparatus 10C Seal apparatus 11 1st rubber member 11A Rubber member 12 2nd rubber member 13 Annular member 13a Opening part 13b Base part 13c Edge part 14 Annular member 14a Annular member main body 14b 1st metal member 14c Thin wall Rubber member 14d Second metal member 14e Edge 14f Through hole 15 O-ring 16 Rubber member 17 Annular member 17a Opening 17b Base 17c Edge 18 Edge 19a Device body 19b Inner tube 19c Outer tube 19d Opening 19e Opening 19f Rubber Hollow body 21a Fuel supply pipe 21b Fuel discharge pipe 22 Grip member 33 Base tube 38 Fuel cell 38a Inspected area 38b Hollow part 39 Cylindrical work 39a Inspected area 39b Hollow part 41 Sealed container 41a Inside 41b Air inlet 41c Air exhaust Outlet 44 Airtight container 44a Inside 44 Air inlet discharge pipe 51 the fuel electrode 52 electrolyte 53 interconnector 54 air electrode 141 O-ring 142 jig (flange)
143 Airtight container 143a Inside 144 Air inlet 145 Air outlet

Claims (5)

A leak inspection seal device used for leak inspection of a cylindrical solid oxide fuel cell ,
The leak inspection seal device is formed in a cylindrical shape having an inner diameter larger than an outer diameter of the cylindrical solid oxide fuel cell ,
The inner peripheral surface of the leak inspection seal device has a second elastic member formed in a hollow cylindrical shape inside, and a first cylindrical member joined to the inner peripheral surface of the second elastic member. An elastic member ,
The second elastic member is provided with an opening for introducing or discharging a fluid into the inside, and the second elastic member bulges when the fluid is introduced into the inside through the opening. The first elastic member is pressed so that the inner peripheral surface of the first elastic member is in close contact with the outer peripheral portion of the cylindrical solid electrolyte fuel cell.
Seal device for leak inspection. The seal device for leak inspection according to claim 1,
Furthermore,
An annular or cylindrical support member provided on an outer peripheral portion of the second elastic member is provided, and the support member is configured such that when the fluid is introduced into the inside, the second elastic member is the cylindrical solid electrolyte type. Provided to prevent the fuel cell from bulging away from the outer peripheral portion.
Seal device for leak inspection. A leak inspection seal device used for leak inspection of a cylindrical solid oxide fuel cell ,
The leak inspection seal device is formed in a cylindrical shape having an outer diameter smaller than an inner diameter of the cylindrical solid oxide fuel cell ,
A second elastic member formed in a hollow cylindrical shape on the outer peripheral surface of the leak inspection seal device, and a first elastic member formed in a cylindrical shape joined to the outer peripheral surface of the second elastic member And provided,
The second elastic member is provided with an opening for introducing or discharging a fluid into the inside, and the second elastic member bulges when the fluid is introduced into the inside through the opening. The first elastic member is pressed, and the first elastic member comes into close contact with the inner peripheral portion of the cylindrical solid electrolyte fuel cell.
Seal device for leak inspection. A cylindrical solid electrolyte fuel cell leakage inspection device for performing a leakage inspection of a cylindrical solid electrolyte fuel cell ,
A sealed container in which the cylindrical solid oxide fuel cell is disposed;
A fluid introduction / exhaust unit for introducing / discharging a second fluid different from the first fluid put in the inner periphery of the cylindrical solid oxide fuel cell into the inside of the sealed container;
A leak inspection seal device for sealing the outer periphery of the cylindrical solid oxide fuel cell with respect to the inside of the sealed container,
The leak inspection seal device is formed in a cylindrical shape having an inner diameter larger than an outer diameter of the cylindrical solid oxide fuel cell ,
The inner peripheral surface of the leak inspection seal device has a second elastic member formed in a hollow cylindrical shape inside, and a first cylindrical member joined to the inner peripheral surface of the second elastic member. An elastic member,
The second elastic member is provided with an opening for introducing or discharging a fluid into the inside, and the second elastic member bulges when the fluid is introduced into the inside through the opening. presses the first elastic member Te, the inner peripheral surface of the first elastic member is brought into close contact with the outer peripheral portion of said cylindrical solid oxide fuel cell
Cylindrical solid oxide fuel cell leak inspection system. In the leak inspection apparatus for a cylindrical solid oxide fuel cell according to claim 4,
The seal device for leak inspection is
Furthermore,
An annular or cylindrical support member provided on the outer periphery of the second elastic member ;
The support member is provided to prevent the second elastic member from expanding in a direction away from the outer peripheral portion of the cylindrical solid oxide fuel cell when the fluid is introduced into the inside. Has been
Cylindrical solid oxide fuel cell leak inspection system.

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