Proton exchange membrane hydrogen permeability measurement device and measurement method based on isobaric method

Abstract

The present invention discloses a proton exchange membrane hydrogen permeability measuring device and a measuring method based on an isobaric method, and relates to the technical field of permeability measurement. The proton exchange membrane hydrogen permeability measuring device based on an isobaric method comprises a box body and an upper box body installed on the top of the box body, a base is fixed to the bottom of the box body, a box opening is provided on one side of the box body, a box door is installed at the box opening, a bottom seal is fixed on the base, a No. 1 guide rod is installed on both sides of the bottom seal, and a guide sleeve is fixed on both sides of the top seal member to slide with the No. 1 guide rod, so that when the pressing block presses the proton exchange membrane body into the pressing groove, the central part of the proton exchange membrane body can move toward the pressing groove through the reserved compensation part, thereby avoiding the problem of excessive tension and deformation of the measuring part of the central part of the proton exchange membrane body when it is pressed by the pressing block and the pressing groove.

Description

Technical Field

[0001] The present invention relates to the technical field of permeability measurement, and in particular to a proton exchange membrane hydrogen permeability measurement device and a measurement method based on an isobaric method. Background Art

[0002] The proton exchange membrane is the core component of the proton exchange membrane fuel cell and plays a key role in the battery's performance. It not only has a barrier function but also has the function of conducting protons.

[0003] In the development and production of fuel cells, the measurement of hydrogen permeability of proton exchange membranes is crucial. This is typically done by using two chambers with one side open. The two chambers move relative to each other to clamp the proton exchange membrane. The core of the system is a device (diffusion cell) that can tightly seal and separate the membrane sample into two independent chambers.

[0004] The existing technology typically achieves this by directly pressing the membrane. This sealing method has the problem that when the upper pressing member presses downward, it presses the proton exchange membrane into the pressing groove. This step can achieve the fixation and sealing of the proton exchange membrane. However, during the downward pressing process, the proton exchange membrane is squeezed, causing the two sides of the upper pressing block to move into the pressing groove.

[0005] To achieve a tight seal, a pressure piece is typically placed at the bottom of the upper chamber, while a pressure groove is located at the top of the lower chamber. After compression, the proton exchange membrane inside the upper or lower chamber becomes the measuring portion.

[0006] During compression, the part of the proton exchange membrane outside the chamber part can avoid stretching by moving toward the pressing groove, while the part inside the chamber part will be stretched or slightly deformed toward the pressing groove, and then the measuring part of the proton exchange membrane will cause excessive tension when subjected to force, thereby affecting the measurement results. Summary of the Invention

[0007] In response to the shortcomings of the existing technology, the present invention provides a proton exchange membrane hydrogen permeability measurement device and measurement method based on the isobaric method, which solves the problem that when the measuring part of the proton exchange membrane is subjected to force, it will cause excessive tension, thereby affecting the measurement results.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a proton exchange membrane hydrogen permeability measuring device based on the isobaric method, comprising a box body and an upper box body installed on the top of the box body, a base fixed to the bottom of the box body, a box opening provided on one side of the box body, and a box door installed at the box opening, and further comprising:

[0009] A bottom seal, which is fixed on the base and has guide rods No. 1 installed on both sides;

[0010] A top seal, with guide sleeves fixed on both sides of the top seal for sliding engagement with the No. 1 guide rod, the top seal and the bottom seal being connected via a press-fit assembly, and an integrated portion fixed on both sides of the top seal;

[0011] A No. 2 movable groove is provided in each of the two integrated parts, and opposite sides of the two No. 2 movable grooves are connected to the bottom seal. A No. 1 movable groove is provided on the top of the No. 2 movable groove and is connected thereto, and a No. 4 movable groove is provided on the bottom of the No. 2 movable groove.

[0012] Two L-shaped plates are slidably mounted in the two No. 4 movable grooves respectively, and a blocking plate fixed to the L-shaped plates is slidably mounted on the inner wall of the top seal, and a No. 1 pressure ring fixed to the two blocking plates is installed in the top seal;

[0013] The bottoms of the L-shaped plate and the No. 1 pressure ring both protrude beyond the bottom end of the top seal;

[0014] Two pressure-bearing parts, fixed on both sides of the bottom seal and cooperating with the L-shaped plate;

[0015] A second guide rod is fixed on the top of each of the two L-shaped plates and is slidably matched with the first movable groove. A spring is sleeved on the second guide rod.

[0016] A pressing assembly is installed on the opposite side of the top seal and the bottom seal;

[0017] The upper membrane assembly is installed on the base and is used to pull the proton exchange membrane body to cover the open part of the bottom seal.

[0018] Furthermore, a No. 3 movable groove is provided at the bottom of the top seal, and a No. 2 pressure ring abutting against the bottom seal is slidably installed in the No. 3 movable groove, and the No. 2 pressure ring cooperates with the upper membrane assembly.

[0019] Furthermore, the pressing assembly includes a pressing block fixed to the bottom of the top seal, a pressing groove adapted to the pressing block is provided on the bottom seal, and a rubber layer is fixed on the pressing block.

[0020] Furthermore, the pressing assembly includes four screw rods rotatably mounted on both sides of the bottom seal, the four screw rods are each sleeved with a threaded sleeve threadedly matched therewith, and the four threaded sleeves are each fixed to the top seal;

[0021] The bottom ends of the four screw rods are coaxially fixed with driven gears, which are meshed with a gear ring rotatably mounted on the base, and an anti-slip ring is fixed on the edge of the gear ring.

[0022] Furthermore, the upper membrane assembly includes two brackets fixed on the base, and the two brackets are respectively located on both sides of the bottom seal;

[0023] Two conveying rollers are rotatably mounted on the two brackets, and the two conveying rollers on one side are connected by a conveyor belt. An adsorption block is fixed between the two conveyor belts, and adsorption holes are provided at the bottom of the adsorption block.

[0024] A through opening is provided at the bottom of a bracket close to one side of the box door, and the through opening is located at the bottom of the bracket.

[0025] Furthermore, the bottom seal is provided with a passage slot for the conveyor belt to pass through;

[0026] The distance between the bottom of the adsorption block and the top of the bottom seal is 0.1 cm.

[0027] Furthermore, the adsorption block is in the shape of an isosceles triangle.

[0028] Furthermore, a plurality of secondary compression grooves are provided on the inner wall of the compression groove, and the secondary compression grooves are equidistantly distributed around the circumference.

[0029] Furthermore, a leveling portion is fixed on a bracket close to the door side, and the top of the leveling portion is parallel to the top of the bottom seal.

[0030] A method for measuring the hydrogen permeability of a proton exchange membrane using an isobaric method comprises the following steps:

[0031] Step 1: Manually open the box door, and then flatten the proton exchange membrane body and place it on the leveling part;

[0032] Step 2: The upper membrane assembly completes the upper membrane work of the proton exchange membrane body, so that the proton exchange membrane body covers the bottom seal, and then drives the top seal to descend through the pressing assembly. When the top seal descends to the formation end, the proton exchange membrane body is fixed and tightened by the pressing assembly;

[0033] Step 3: After the measurement is completed, the top seal is driven to rise by the pressing assembly, and the measured proton exchange membrane body is taken out.

[0034] The present invention has the following beneficial effects:

[0035] First, the proton exchange membrane hydrogen permeability measuring device based on the isobaric method uses a No. 1 pressure ring to press the proton exchange membrane body into the compression groove before the compression block presses the proton exchange membrane body toward the center of the proton exchange membrane body, so that a certain depression appears in the center of the proton exchange membrane body. This depression will reserve compensation for the center of the proton exchange membrane body;

[0036] When the pressing block presses the proton exchange membrane body into the pressing groove, the reserved compensation portion allows the central portion of the proton exchange membrane body to move toward the pressing groove, thereby avoiding the problem of excessive tension and deformation of the measuring portion of the central portion of the proton exchange membrane body when the pressing block and the pressing groove are pressed;

[0037] Secondly, after the proton exchange membrane body is compressed, the tension is in an optimal state, and neither no tension nor excessive tension occurs, so that it is suitable for isobaric measuring equipment or non-isobaric measuring equipment.

[0038] 2. The proton exchange membrane hydrogen permeability measuring device based on the isobaric method realizes the automatic membrane loading of the proton exchange membrane body during the test through the membrane loading assembly, and cooperates with the No. 2 pressure ring to achieve flattening during loading, avoiding wrinkles during loading.

[0039] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0041] Figure 2 for Figure 1 Cross-sectional view of the box body and upper box body;

[0042] Figure 3 This is a schematic diagram of the structure inside the box body of the present invention;

[0043] Figure 4 for Figure 3 A schematic diagram of the structure in another direction;

[0044] Figure 5 It is a cross-sectional plan view of the top seal, bottom seal, and No. 2 pressure plate in the present invention;

[0045] Figure 6 for Figure 5 A magnified view of the local structure at point A;

[0046] Figure 7 for Figure 5 Axonometric view of

[0047] Figure 8 Schematic diagram of the position of the compression block in the present invention;

[0048] Figure 9 Schematic diagram of the position of the compression groove in the present invention;

[0049] Figure 10 Schematic diagram of the structure of the driven gear and the gear ring in the present invention;

[0050] Figure 11Schematic diagram of the negative pressure portion of the present invention;

[0051] Figure 12 It is a schematic diagram of the state of the compression assembly in the present invention;

[0052] Figure 13 Schematic diagram of the structure of the upper membrane assembly in the present invention;

[0053] Figure 14 for Figure 13 A magnified view of the local structure at point B in the middle;

[0054] Figure 15 for Figure 13 A magnified view of the local structure at point C in the middle;

[0055] Figure 16 This is a diagram showing the force applied to the proton exchange membrane body by the ring when the second pressure element and the upper membrane assembly are in cooperation with each other;

[0056] Figure 17 Schematic diagram of the position of the proton exchange membrane when it is compressed by the No. 1 pressure ring in the present invention;

[0057] Figure 18 Schematic diagram of the adsorption hole in the present invention;

[0058] Figure 19 A schematic diagram of the technical problem of the present invention;

[0059] Figure 20 It is a structural schematic diagram of the secondary compression groove in the present invention.

[0060] In the figure: 1. Box body; 101. Upper box body; 102. Controller; 103. Box door; 104. Base; 2. Top seal; 201. Bottom seal; 202. No. 1 guide rod; 203. Integration part; 204. Threaded sleeve; 205. Screw; 206. Guide sleeve; 207. Pressure part; 208. Driven gear; 209. Gear ring; 2010. Anti-slip ring; 3. Bracket; 301. Adsorption block; 302. Leveling part; 303. Adsorption hole; 30 4. Conveyor belt; 305. Conveyor roller; 306. Bevel gear set; 307. Motor; 308. Passing groove; 4. Pressure ring No. 1; 401. Sealing plate; 402. Guide rod No. 2; 403. Spring; 404. L-shaped plate; 5. Movable groove No. 1; 501. Movable groove No. 2; 502. Groove; 6. Movable groove No. 3; 601. Pressure ring No. 2; 7. Pressing block; 701. Pressing groove; 702. Secondary pressing groove; 8. Proton exchange membrane body; 9. Access part. DETAILED DESCRIPTION

[0061] The following is based on Figures 1-20 The present invention describes a proton exchange membrane hydrogen permeability measurement device based on an isobaric method provided in an embodiment of the present invention.

[0062] See also Figures 1-20 , an embodiment of the present invention provides a technical solution: a proton exchange membrane hydrogen permeability measuring device based on an isobaric method, comprising a box body 1 and an upper box body 101 installed on the top of the box body 1, a base 104 is fixed to the bottom of the box body 1, a box opening is provided on one side of the box body 1, and a box door 103 is installed at the box opening, and further comprising a bottom seal 201, a top seal 2, a No. 2 movable groove 501 opened in both integrated parts 203, two L-shaped plates 404 and an upper membrane assembly, the bottom seal 201 is fixed on the base 104, a No. 1 guide rod 202 is installed on both sides of the bottom seal 201, a guide sleeve 206 that slides with the No. 1 guide rod 202 is fixed on both sides of the top seal 2, the top seal 2 and the bottom seal 201 are connected by a press-fit assembly, and an integrated part 203 is fixed on both sides of the top seal 2, the two No. 2 movable grooves 501 are connected to the bottom seal 201 on the opposite side, and the top of the No. 2 movable groove 501 is opened. It is provided with a No. 1 movable groove 5 connected to it, and a No. 4 movable groove is opened at the bottom of the No. 2 movable groove 501. Two L-shaped plates 404 are respectively slidably installed in the two No. 4 movable grooves, and a sealing plate 401 fixed to the L-shaped plate 404 is slidably installed on the inner wall of the top seal 2. A No. 1 pressure ring 4 fixed to the two sealing plates 401 is installed in the top seal 2, wherein the bottoms of the L-shaped plate 404 and the No. 1 pressure ring 4 both protrude beyond the bottom end of the top seal 2, and the two pressure-bearing parts 207 are fixed to both sides of the bottom seal 201 and cooperate with the L-shaped plate 404. A No. 2 guide rod 402 slidingly cooperating with the No. 1 movable groove 5 is fixed to the top of the two L-shaped plates 404, and a spring 403 is sleeved on the No. 2 guide rod 402. A clamping assembly is installed on the opposite side of the top seal 2 and the bottom seal 201, and the upper membrane assembly is installed on the base 104, which is used to pull the proton exchange membrane body 8 to cover the open part of the bottom seal 201.

[0063] In this embodiment of the present invention, the upper housing 101 houses the measurement equipment. Connectors 9 are fixed to both the top and bottom seals 201. The measurement equipment is connected to these connectors via pipes, and the circuitry of the measurement equipment communicates with the controller 102 mounted on the housing 1.

[0064] During measurement, the chamber door 103 is manually opened, and the end of the proton exchange membrane body 8 is placed on the upper membrane assembly. The upper membrane assembly drives the proton exchange membrane body 8 toward the interior of the chamber 1 until the proton exchange membrane body 8 completely covers the opening of the bottom seal 201. Subsequently, the top seal 2 is driven toward the bottom seal 201 by the pressing assembly.

[0065] During the descent process, the No. 1 pressure ring 4 first presses the proton exchange membrane body 8 in the open position of the bottom seal 201, causing the proton exchange membrane body 8 to form a central depression. As the top seal 2 descends, after the No. 1 pressure ring 4 completes its compression of the proton exchange membrane body 8, the bottom of the L-shaped plate 404 abuts against the pressure-bearing portion 207, which limits the position of the L-shaped plate 404. The subsequent movement actually stops the L-shaped plate 404 and the No. 1 pressure ring 4, while the top seal 2 continues to move toward the bottom seal 201. This state is the relative movement of the L-shaped plate 404, the No. 1 pressure ring 4, and the top seal 2, causing them to simultaneously move toward the interior of the top seal 2.

[0066] When the L-shaped plate 404 moves, it drives the second guide rod 402 to move accordingly, and compresses the spring 403 at the same time, so that the spring 403 stores elastic potential energy while being compressed and deformed.

[0067] The bottom of the No. 1 pressure ring 4 is configured as an airbag. Initially, the airbag is inflated, making the portion of the No. 1 pressure ring 4 protruding from the top seal 2 longer than the L-shaped plate 404. When the No. 1 pressure ring 4 is used to press the proton exchange membrane body 8, the pressure is actually applied through the airbag.

[0068] When the L-shaped plate 404 rises relative to the top seal 2, a negative pressure zone forms within the second movable groove 501. This negative pressure zone is connected to the airbag via a pipe. When this negative pressure zone is generated, the gas within the airbag is drawn into the negative pressure zone through the pipe, thereby maintaining the first pressure ring 4 parallel to the bottom of the L-shaped plate 404. This prevents the airbag from continuously pressing against the proton exchange membrane body 8 when the top seal 2 abuts the top of the bottom seal 201.

[0069] Simply put, when the airbag is inflated, the bottom of the No. 1 pressure ring 4 protrudes a portion compared to the L-shaped plate 404; and when the top seal 2 and the bottom seal 201 are in contact, the negative pressure formed in the No. 2 movable groove 501 sucks out the gas in the airbag, so that the contact point of the top seal 2 and the bottom seal 201, the bottom of the No. 1 pressure ring 4, and the bottom of the L-shaped plate 404 are at the same height, so that the center part of the proton exchange membrane body 8 can be pressed when the top seal 2 and the bottom seal 201 are in contact.

[0070] When the top seal 2 rises, the elastic potential energy stored in the release spring 403 drives the L-shaped plate 404 to fall, thereby squeezing the gas in the negative pressure area into the air bag of the No. 1 pressure ring 4.

[0071] After the top seal 2 and the bottom seal 201 are in contact, the proton exchange membrane body 8 is compressed by the compression structure so that the proton exchange membrane body 8 is tightened to a suitable tension.

[0072] Finally, the controller 102 controls the measuring device to perform measurement.

[0073] It should also be noted that grooves 502 are provided at the bottom of the two integrated parts 203, and a contact piece is fixed at the bottom of the L-shaped plate 404. This design will increase the contact surface of the L-shaped plate 404 when it contacts the pressure part 207, making it more stable; and the function of the groove 502 is to accommodate the contact piece.

[0074] A third movable groove 6 is further provided at the bottom of the top seal 2 , in which a second pressure ring 601 is slidably installed to abut against the bottom seal 201 , and the second pressure ring 601 cooperates with the upper membrane assembly.

[0075] In this embodiment of the present invention, the second pressure ring 601 is slidably connected to the third movable groove 6, that is, to the top seal 2, and abuts the bottom seal 201. When the top seal 2 descends, the third movable groove 6 and the second pressure ring 601 enter a sliding relationship, but the position of the second pressure ring 601 remains unchanged.

[0076] The upper membrane assembly pulls one end of the proton exchange membrane body 8 forward, allowing the proton exchange membrane body 8 to move forward under the second pressure ring 601. During this process, the proton exchange membrane body 8 is actually located between the bottom seal 201 and the second pressure ring 601. The second pressure ring 601 applies pressure to the proton exchange membrane body 8 due to its own weight.

[0077] At the same time, during the process of the proton exchange membrane body 8 moving forward, the proton exchange membrane body 8 is flattened by the second pressure ring 601 to prevent wrinkles from occurring on the proton exchange membrane body 8 .

[0078] After the membrane is applied to the proton exchange membrane body 8, the third movable groove 6 remains in a state of compressing the proton exchange membrane body 8. When the first pressure ring 4 presses on the proton exchange membrane body 8, the center portion of the proton exchange membrane body 8 is depressed due to the force. When the proton exchange membrane body 8 is depressed, the second pressure ring 601 compresses the proton exchange membrane body 8 to prevent it from rebounding when the pressure is released.

[0079] The pressing assembly includes a pressing block 7 fixed to the bottom of the top seal 2 , a pressing groove 701 adapted to the pressing block 7 is formed on the bottom seal 201 , and a rubber layer is fixed on the pressing block 7 .

[0080] In the embodiment of the present invention, when the top seal 2 descends, the pressing block 7 is driven to descend synchronously. When the top seal 2 descends to abut against the bottom seal 201 , it is inserted into the pressing groove 701 and presses the proton exchange membrane body 8 into the pressing groove 701 .

[0081] Before this process, the center portion of the proton exchange membrane body 8 is pressed and becomes concave. The concave portion is used to compensate when the pressing block 7 presses the proton exchange membrane body 8 into the pressing groove 701 .

[0082] Compared with the existing pressing equipment, the pressing block 7 does not apply tension to the proton exchange membrane body 8 when pressing the proton exchange membrane body 8 into the pressing groove 701, causing the tension of the proton exchange membrane body 8 to be too large, resulting in deviation in the measurement effect. The present invention presses the center of the proton exchange membrane body 8 before pressing, so that the proton exchange membrane body 8 is concave, leaving a margin when the proton exchange membrane body 8 is pressed into the pressing groove 701, thereby offsetting the excess tension when the proton exchange membrane body 8 is pressed into the pressing groove 701, so that the tension of the proton exchange membrane body 8 measured will not be too large.

[0083] The pressing assembly includes four screw rods 205 rotatably mounted on both sides of the bottom seal 201 . The four screw rods 205 are sleeved with threaded sleeves 204 threadedly matched therewith, and the four threaded sleeves 204 are fixed to the top seal 2 .

[0084] The bottom ends of the four screw rods 205 are coaxially fixed with driven gears 208 , which mesh with a gear ring 209 rotatably mounted on the base 104 . An anti-slip ring 2010 is fixed to the edge of the gear ring 209 .

[0085] In this embodiment of the present invention, when performing measurements, the chamber door 103 is opened and the proton exchange membrane body 8 is placed on the upper membrane assembly. After the upper membrane assembly completes the membrane application, the anti-slip ring 2010 and the gear ring 209 are manually rotated. Rotation of the gear ring 209 synchronously drives the four driven gears 208; rotation of the driven gears 208 also synchronously drives the corresponding screws 205. Rotation of the screws 205, through threaded engagement with the threaded sleeve 204, drives the threaded sleeve 204 and the top seal 2 vertically downward. After the measurement is completed, the anti-slip ring 2010 and gear ring 209 are rotated in the opposite direction, causing the corresponding top seal 2 to vertically ascend.

[0086] Secondly, in this embodiment, the anti-slip ring 2010 is used to increase the friction when driving the gear ring 209. Of course, the gear ring 209 can also be driven to rotate by a motor, and manual drive or motor drive can be selected according to actual production needs.

[0087] It should be noted that, since this embodiment uses the screw rod 205 and the threaded sleeve 204 to drive the top seal 2 to descend and ascend vertically, it is well known that the force required for thread transmission is relatively small, so the driving gear ring 209 does not require a large force.

[0088] The upper membrane assembly includes two brackets 3 fixed on the base 104 , and the two brackets 3 are respectively located on both sides of the bottom seal 201 .

[0089] Two conveying rollers 305 are rotatably mounted on both brackets 3 . The two conveying rollers 305 on one side are connected by a conveying belt 304 . An adsorption block 301 is fixed between the two conveying belts 304 . Adsorption holes 303 are provided at the bottom of the adsorption block 301 .

[0090] The adsorption block 301 is in the shape of an isosceles triangle.

[0091] When the adsorption block 301 moves horizontally until it contacts the No. 2 pressure ring 601, since the adsorption block 301 is an isosceles triangle, its top is two inclined surfaces, which can drive the No. 2 pressure ring 601 to rise upright. Whether moving forward or backward, the No. 2 pressure ring 601 can be driven to rise and make way for the adsorption block 301 to pass.

[0092] In an embodiment of the present invention, a motor 307 is fixed on both sides of a single bracket 3, and the output shaft of the motor 307 is connected to the conveying roller 305 through a bevel gear set 306. When the motor 307 is working, its output shaft drives the two conveying rollers 305 on the bracket 3 to rotate synchronously through the bevel gear set 306, so that when the two conveying rollers 305 on one of the brackets 3 rotate, the two conveying rollers 305 on the other bracket 3 are driven to rotate synchronously through the conveyor belt 304, thereby making the two conveyor belts 304 perform synchronous conveying; when the two conveyor belts 304 perform synchronous conveying, the adsorption block 301 is driven to perform horizontal movement.

[0093] The adsorption block 301 is provided with a cavity therein, and the cavity is connected to the micro negative pressure device through a pipe, or the micro negative pressure device is integrated into the cavity.

[0094] When the membrane is being placed, the conveyor belt 304 is driven to move to the side of the box door 103, and then one end of the proton exchange membrane body 8 is placed at the bottom of the conveyor belt 304. A negative pressure device is used to generate negative pressure in the cavity, and the adsorption holes 303 at the bottom of the conveyor belt 304 generate suction through the negative pressure to adsorb one end of the proton exchange membrane body 8 to the bottom of the adsorption block 301. Finally, the conveyor belt 304 is driven to move in the opposite direction away from the box door 103 to drive the proton exchange membrane body 8 to cover the bottom seal 201.

[0095] When the conveyor belt 304 moves to contact the second pressure ring 601 , the second pressure ring 601 is driven to rise, so that the proton exchange membrane body 8 passes through the bottom of the second pressure ring 601 .

[0096] It should also be noted that the bevel gear set 306 includes two bevel gears meshing with each other, and the two bevel gears are coaxially fixed to the motor 307 and the conveying roller 305 respectively.

[0097] A through opening is provided at the bottom of one of the brackets 3 near the box door 103 , and the through opening is located at the bottom of the bracket 3 .

[0098] By providing a through slot at the bottom of the bracket 3, the arm can pass through when the gear ring 209 and the anti-slip ring 2010 are manually driven to rotate. Of course, if a motor is used for driving, no through slot is required.

[0099] A leveling portion 302 is fixed on a bracket 3 near the door 103 , and the top of the leveling portion 302 is parallel to the top of the bottom seal 201 .

[0100] In an embodiment of the present invention, the proton exchange membrane body 8 is manually flattened and placed on the leveling portion 302, and after being flattened, it is pushed forward a certain distance, and then the end of the proton exchange membrane body 8 is adsorbed by the adsorption block 301, and the membrane is placed on the membrane by horizontal movement of the adsorption block 301.

[0101] The bottom seal 201 is provided with a passage 308 for the conveyor belt 304 to pass through;

[0102] The distance between the bottom of the adsorption block 301 and the top of the bottom seal 201 is 0.1 cm.

[0103] In an embodiment of the present invention, this design allows the conveyor belt 304 to not affect the contact between the top seal 2 and the bottom seal 201, while allowing the adsorption block 301 to move horizontally along the top of the bottom seal 201. The distance between the adsorption block 301 and the bottom seal 201 is greater than the thickness of the proton exchange membrane body 8. Of course, as the thickness of the proton exchange membrane body 8 increases, the distance between the bottom seal 201 and the adsorption block 301 also increases accordingly. In the present invention, the distance between the adsorption block 301 and the bottom seal 201 is limited to 0.1 cm, that is, the thickness of the proton exchange membrane body 8 is less than 0.1 cm.

[0104] A plurality of secondary pressing grooves 702 are formed on the inner wall of the pressing groove 701 , and the secondary pressing grooves 702 are equidistantly distributed around the circumference.

[0105] In an embodiment of the present invention, after the compression block 7 presses the proton exchange membrane body 8 into the compression groove 701, the rubber layer on its surface will deform when the compression groove 701 is subjected to force, so as to be squeezed into the secondary compression groove 702. This process will cause the proton exchange membrane body 8 to enter the secondary compression groove 702 through the deformation and squeezing of the rubber layer, thereby further increasing the friction force and thus improving the compression stability.

[0106] The present invention also provides a method for measuring the hydrogen permeability of a proton exchange membrane based on an isobaric method, which uses the device for measuring the hydrogen permeability of a proton exchange membrane based on an isobaric method, comprising the following steps:

[0107] Step 1: manually open the box door 103, and then flatten the proton exchange membrane body 8 and place it on the flattening part 302;

[0108] Step 2: The upper membrane assembly completes the upper membrane work of the proton exchange membrane body 8, so that the proton exchange membrane body 8 covers the bottom seal 201, and then drives the top seal 2 to descend through the pressing assembly. When the top seal 2 descends to the end of its stroke, the proton exchange membrane body 8 is fixed and tightened by the pressing assembly;

[0109] Step 3: After the measurement is completed, the top seal 2 is driven to rise by the pressing assembly, and the measured proton exchange membrane body 8 is taken out.

Claims

1. A proton exchange membrane hydrogen permeability measuring device based on an isobaric method, comprising a box body (1) and an upper box body (101) installed on the top of the box body (1), a base (104) being fixed to the bottom of the box body (1), a box opening being provided on one side of the box body (1), and a box door (103) being installed at the box opening, characterized in that: Also includes: A bottom seal (201), the bottom seal (201) is fixed on the base (104), and a guide rod (202) is installed on both sides of the bottom seal (201); A top seal (2), wherein guide sleeves (206) that slide with the first guide rod (202) are fixed on both sides of the top seal (2), the top seal (2) and the bottom seal (201) are connected via a press-fit assembly, and an integrated portion (203) is fixed on both sides of the top seal (2); A second movable groove (501) is provided in each of the two integrated parts (203), and the two second movable grooves (501) are connected to the bottom seal (201) on opposite sides. A first movable groove (5) is provided on the top of the second movable groove (501) and is connected thereto, and a fourth movable groove is provided on the bottom of the second movable groove (501); Two L-shaped plates (404) are slidably mounted in two No. 4 movable grooves, respectively, and a blocking plate (401) fixed to the L-shaped plates (404) is slidably mounted on the inner wall of the top sealing member (2), and a No. 1 pressure ring (4) fixed to the two blocking plates (401) is mounted in the top sealing member (2); The bottoms of the L-shaped plate (404) and the No. 1 pressure ring (4) both protrude beyond the bottom end of the top seal (2); Two pressure-bearing portions (207), fixed to both sides of the bottom seal (201) and cooperating with the L-shaped plate (404); A second guide rod (402) that is slidably engaged with the first movable groove (5) is fixed to the top of each of the two L-shaped plates (404), and a spring (403) is sleeved on the second guide rod (402); A pressing assembly is installed on the side opposite to the top seal (2) and the bottom seal (201); The upper membrane assembly is mounted on the base (104) and is used to pull the proton exchange membrane body (8) to cover the open portion of the bottom seal (201).

2. The proton exchange membrane hydrogen permeability measuring device based on the isobaric method according to claim 1, characterized in that: The bottom of the top seal (2) is also provided with a third movable groove (6), in which a second pressure ring (601) is slidably installed to abut against the bottom seal (201), and the second pressure ring (601) cooperates with the upper membrane assembly.

3. The proton exchange membrane hydrogen permeability measuring device based on the isobaric method according to claim 2, characterized in that: The pressing assembly comprises a pressing block (7) fixed to the bottom of the top seal (2); a pressing groove (701) adapted to the pressing block (7) is provided on the bottom seal (201); and a rubber layer is fixed on the pressing block (7).

4. The device for measuring hydrogen permeability of a proton exchange membrane based on an isobaric method according to claim 3, characterized in that: The pressing assembly comprises four screw rods (205) rotatably mounted on both sides of the bottom seal (201), the four screw rods (205) are each sleeved with a threaded sleeve (204) threadedly matched therewith, and the four threaded sleeves (204) are each fixed to the top seal (2); The bottom ends of the four screw rods (205) are coaxially fixed with driven gears (208), and the driven gears (208) are engaged with a gear ring (209) rotatably mounted on the base (104), and an anti-slip ring (2010) is fixed to the edge of the gear ring (209).

5. The device for measuring hydrogen permeability of a proton exchange membrane based on an isobaric method according to claim 1, characterized in that: The upper membrane assembly comprises two brackets (3) fixed on the base (104), and the two brackets (3) are respectively located on both sides of the bottom seal (201); Two conveying rollers (305) are rotatably mounted on the two brackets (3); the two conveying rollers (305) on one side are connected by a conveying belt (304); an adsorption block (301) is fixed between the two conveying belts (304); and an adsorption hole (303) is provided at the bottom of the adsorption block (301); A through opening is provided at the bottom of a bracket (3) on one side close to the box door (103), and the through opening is located at the bottom of the bracket (3).

6. The device for measuring hydrogen permeability of a proton exchange membrane based on an isobaric method according to claim 5, characterized in that: The bottom seal (201) is provided with a passage slot (308) for the conveyor belt (304) to pass through; The distance between the bottom of the adsorption block (301) and the top of the bottom seal (201) is 0.1 cm.

7. The device for measuring hydrogen permeability of a proton exchange membrane based on an isobaric method according to claim 6, characterized in that: The adsorption block (301) is in the shape of an isosceles triangle.

8. The device for measuring hydrogen permeability of a proton exchange membrane based on an isobaric method according to claim 3, characterized in that: The inner wall of the compression groove (701) is provided with a plurality of secondary compression grooves (702), and the secondary compression grooves (702) are distributed equidistantly around the circumference.

9. The device for measuring hydrogen permeability of a proton exchange membrane based on an isobaric method according to claim 5, characterized in that: A leveling portion (302) is fixed on a bracket (3) on one side close to the door (103), and the top of the leveling portion (302) is parallel to the top of the bottom seal (201).

10. A method for measuring hydrogen permeability of a proton exchange membrane based on an isobaric method according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: manually open the box door (103), and then flatten the proton exchange membrane body (8) and place it on the flattening part (302); Step 2: The upper membrane assembly completes the upper membrane operation of the proton exchange membrane body (8), so that the proton exchange membrane body (8) covers the bottom seal (201), and then drives the top seal (2) to descend through the pressing assembly. When the top seal (2) descends to the end of the stroke, the proton exchange membrane body (8) is fixed and tightened through the pressing assembly; Step 3: After the measurement is completed, the top seal (2) is driven to rise by the pressing assembly, and the measured proton exchange membrane body (8) is taken out.

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