Device and method for measuring hydrogen transmittance of proton exchange membrane based on isobaric method

Abstract

The invention discloses a proton exchange membrane hydrogen transmittance measuring device and method based on an isobaric method, and relates to the technical field of passing rate measuration.The proton exchange membrane hydrogen transmittance measuring device based on the isobaric method comprises a box body and an upper box body installed on the top of the box body, and a base is fixed to the bottom of the box body; a box opening is formed in one side of the box body, a box door is installed at the position of the box opening, a bottom sealing piece is fixed to the base, first guide rods are installed on the two sides of the bottom sealing piece respectively, and guide sleeves in sliding fit with the first guide rods are fixed to the two sides of a top sealing piece respectively. The central part of the proton exchange membrane body can move towards the interior of the pressing groove through the reserved compensation part, so that the problems of overlarge tension and deformation of the measurement part of the central part of the proton exchange membrane body during pressing through the pressing block and the pressing groove are avoided.

Description

Technical Field

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

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

[0003] In the research and development and production of fuel cells, the measurement of the hydrogen permeability of the proton exchange membrane is crucial. Usually, two single-sided open chamber parts are used, and the open sides of the two chamber parts move relative to each other to clamp and fix the proton exchange membrane. The core is a device (diffusion cell) that can strictly seal the membrane sample into two independent chambers; The existing technology usually realizes it by directly pressing the membrane. The problem with this sealing method is that when the upper pressing part presses down, it will press the proton exchange membrane into the pressing groove, and this step can achieve the fixation and sealing of the proton exchange membrane. However, during the pressing process, the proton exchange membrane is squeezed, causing the two sides of the upper pressing block to move into the pressing groove.

[0004] Due to the need to achieve the effect of pressing and sealing, usually the upper pressing part is arranged at the bottom of the upper chamber part, and the pressing groove is located at the top of the lower chamber part. After pressing, the proton exchange membrane inside the upper chamber part or the lower chamber part is the measurement part.

[0005] During pressing, the part of the proton exchange membrane outside the chamber part can avoid stretching by moving towards the pressing groove, while the part inside the chamber part will be stretched or slightly deformed towards the pressing groove. As a result, when the measurement part of the proton exchange membrane is stressed, the tension will be too large, thus affecting the measurement result. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a proton exchange membrane hydrogen permeability measurement device and a measurement method based on the isobaric method, which solve the problem that when the measurement part of the proton exchange membrane is stressed, the tension will be too large, thus affecting the measurement result.

[0007] To achieve the above object, the present invention is realized through the following technical solutions: A proton exchange membrane hydrogen permeability measurement device based on the isobaric method, including a box body and an upper box body installed on the top of the box body. A base is fixed at the bottom of the box body. A box opening is provided on one side of the box body, and a box door is installed at the box opening. It further includes: A bottom sealing member, which is fixed on the base, and one - way guide rods are installed on both sides thereof; The top sealing member has guide sleeves slidably engaged with the first guide rods fixed on both sides thereof. The top sealing member and the bottom sealing member are connected by a pressing assembly, and integrated parts are fixed on both sides of the top sealing member. Two second movable grooves are formed in the two integrated parts. The opposite sides of the two second movable grooves communicate with the bottom sealing member. A first movable groove communicating therewith is formed at the top of the second movable groove, and a fourth movable groove is formed at the bottom of the second movable groove. Two L-shaped plates are respectively slidably installed in the two fourth movable grooves, and a sealing plate fixed to the L-shaped plate is slidably installed on the inner wall of the top sealing member. A first pressing ring fixed to the two sealing plates is installed in the top sealing member. Wherein, the bottoms of the L-shaped plates and the first pressing ring both protrude beyond the bottom end of the top sealing member. Two pressure-receiving parts are fixed to both sides of the bottom sealing member and cooperate with the L-shaped plates. Second guide rods slidably engaged with the first movable grooves are fixed to the tops of the two L-shaped plates, and springs are sleeved on the second guide rods. A pressing assembly is installed on the opposite sides of the top sealing member and the bottom sealing member. An upper film assembly is installed on the base for pulling the proton exchange membrane body to cover the open part of the bottom sealing member.

[0008] Further, a third movable groove is formed at the bottom of the top sealing member, and a second pressing ring abutted against the bottom sealing member is slidably installed in the third movable groove. The second pressing ring cooperates with the upper film assembly.

[0009] Further, the pressing assembly includes a pressing block fixed to the bottom of the top sealing member. A pressing groove adapted to the pressing block is formed in the bottom sealing member, and a rubber layer is fixed to the pressing block.

[0010] Further, the pressing assembly includes four lead screws rotatably installed on both sides of the bottom sealing member. Threaded sleeves threadedly engaged with the lead screws are sleeved on the four lead screws, and the four threaded sleeves are all fixed to the top sealing member. Driven gears are coaxially fixed to the bottom ends of the four lead screws. The driven gears are meshed with a toothed ring rotatably installed on the base, and an anti-slip ring is fixed to the edge of the toothed ring.

[0011] Further, the upper film assembly includes two brackets fixed to the base. The two brackets are respectively located on both sides of the bottom sealing member. Two conveying rollers are rotatably installed on each of the two brackets. 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. An opening is provided at the bottom of one of the brackets close to the box door. The opening is located at the bottom of the bracket.

[0012] Furthermore, a passing groove for the conveyor belt to pass through is provided on the bottom sealing member; The distance between the bottom of the adsorption block and the top of the bottom sealing member is 0.1 cm.

[0013] Furthermore, the shape of the adsorption block is an isosceles triangle.

[0014] Furthermore, a plurality of secondary pressing grooves are provided on the inner wall of the pressing groove, and the secondary pressing grooves are evenly distributed in a circumferential manner.

[0015] Furthermore, a leveling portion is fixed on one of the brackets close to the box door, and the top of the leveling portion is parallel to the top of the bottom sealing member.

[0016] A measuring method of the above-mentioned proton exchange membrane hydrogen permeability measuring device based on the isobaric method includes the following steps: Step 1: Manually open the box door, and then lay the proton exchange membrane body flat on the leveling portion; 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 sealing member, and then the pressing assembly is used to drive the top sealing member to descend. When the top sealing member descends to form an end, the proton exchange membrane body is fixed and tightened by the pressing assembly; Step 3: After the measurement is completed, the pressing assembly is used to drive the top sealing member to rise, and the proton exchange membrane body that has completed the measurement is taken out.

[0017] The present invention has the following beneficial effects: First, in the proton exchange membrane hydrogen permeability measuring device based on the isobaric method, before the pressing block presses the proton exchange membrane body into the pressing groove, the first pressing ring presses the center part of the proton exchange membrane body once, so that a certain depression appears in the center part of the proton exchange membrane body, and this depression part will reserve compensation for the center part of the proton exchange membrane body; When the pressing block presses the proton exchange membrane body into the pressing groove, the reserved compensation part can make the center part of the proton exchange membrane body move towards the inside of the pressing groove, thereby avoiding the problems of excessive tension and deformation in the measuring part of the center part of the proton exchange membrane body when it is pressed by the pressing block and the pressing groove; Secondly, after the proton exchange membrane body is pressed tightly, the tension is in the best state, without no tension and without excessive tension, so as to be applicable to isobaric measuring equipment or non-isobaric measuring equipment.

[0018] Second, in the proton exchange membrane hydrogen permeability measuring device based on the isobaric method, the automatic upper membrane work of the proton exchange membrane body during testing is realized through the upper membrane assembly, and the flattening work during feeding is realized in cooperation with the second pressing ring, avoiding wrinkles during feeding.

[0019] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the whole of the present invention; Figure 2 is Figure 1 a cross-sectional view of the box body and the upper box body; Figure 3 is a schematic structural diagram of the interior of the box body in the present invention; Figure 4 is Figure 3 a schematic structural diagram in another direction; Figure 5 is a cross-sectional plan view of the top seal, bottom seal, and second pressing plate in the present invention; Figure 6 is Figure 5 a partially enlarged structural view at A in; Figure 7 is Figure 5 an axonometric view of; Figure 8 is a schematic position diagram of the pressing block in the present invention; Figure 9 is a schematic position diagram of the pressing groove in the present invention; Figure 10 is a schematic structural diagram of the driven gear and the toothed ring in the present invention; Figure 11 is a schematic diagram of the negative pressure part in the present invention; Figure 12 is a schematic state diagram of the pressing assembly in the present invention; Figure 13 is a schematic structural diagram of the upper film assembly in the present invention; Figure 14 is Figure 13 a partially enlarged structural view at B in; Figure 15 is Figure 13 a partially enlarged structural view at C in; Figure 16 is a force state diagram of the ring on the proton exchange membrane body when the second pressing in the present invention cooperates with the upper film assembly; Figure 17 is a schematic position diagram of the proton exchange membrane when being pressed by the first pressing ring in the present invention; Figure 18 is a schematic diagram of the adsorption holes in the present invention; Figure 19 is a schematic diagram of the technical problem in the present invention; Figure 20 is a schematic structural diagram of the secondary pressing groove in the present invention.

[0021] In the figure: 1. Box body; 101. Upper box body; 102. Controller; 103. Box door; 104. Base; 2. Top sealing member; 201. Bottom sealing member; 202. First guiding rod; 203. Integrated part; 204. Threaded sleeve; 205. Lead screw; 206. Guiding sleeve; 207. Compressed part; 208. Driven gear; 209. Tooth ring; 2010. Anti-slip ring; 3. Bracket; 301. Adsorption block; 302. Leveling part; 303. Adsorption hole; 304. Conveyor belt; 305. Conveyor roller; 306. Bevel gear set; 307. Motor; 308. Through groove; 4. First pressing ring; 401. Sealing plate; 402. Second guiding rod; 403. Spring; 404. L-shaped plate; 5. First moving groove; 501. Second moving groove; 502. Groove; 6. Third moving groove; 601. Second pressing ring; 7. Pressing block; 701. Pressing groove; 702. Secondary pressing groove; 8. Proton exchange membrane body; 9. Access part. Detailed implementation mode

[0022] Next, according to Figures 1 - 20 Describe the proton exchange membrane hydrogen permeability measurement device based on the isobaric method provided by the embodiments of the present invention.

[0023] Please refer to Figures 1 - 20, an embodiment of the present invention provides a technical solution: a proton exchange membrane hydrogen permeability measuring device based on the isobaric method, including a box body 1 and an upper box body 101 installed on the top of the box body 1. A base 104 is fixed at the bottom of the box body 1. There is a box opening on one side of the box body 1, and a box door 103 is installed at this box opening. It also includes a bottom sealing member 201, a top sealing member 2, second movable grooves 501 opened in both of the two integrated parts 203, two L-shaped plates 404, and an upper membrane assembly. The bottom sealing member 201 is fixed on the base 104, and first guide rods 202 are installed on both sides thereof. Guide sleeves 206 slidably matched with the first guide rods 202 are fixed on both sides of the top sealing member 2. The top sealing member 2 and the bottom sealing member 201 are connected by a pressing assembly. Integrated parts 203 are fixed on both sides of the top sealing member 2. One side of the two second movable grooves 501 communicates with the bottom sealing member 201. A first movable groove 5 communicating therewith is opened at the top of the second movable groove 501, and a fourth movable groove is opened at the bottom of the second movable groove 501. The two L-shaped plates 404 are respectively slidably installed in the two fourth movable grooves, and a sealing plate 401 fixed to the L-shaped plate 404 is slidably installed on the inner wall of the top sealing member 2. A first pressing ring 4 fixed to the two sealing plates 401 is installed in the top sealing member 2. Among them, the bottoms of the L-shaped plate 404 and the first pressing ring 4 both protrude beyond the bottom end of the top sealing member 2. Two pressure-receiving parts 207 are fixed on both sides of the bottom sealing member 201 and cooperate with the L-shaped plate 404. Second guide rods 402 slidably matched with the first movable groove 5 are fixed to the tops of the two L-shaped plates 404. Springs 403 are sleeved on the second guide rods 402. A pressing assembly is installed on the opposite sides of the top sealing member 2 and the bottom sealing member 201. The upper membrane assembly is installed on the base 104 and is used to pull the proton exchange membrane body 8 to cover the open part of the bottom sealing member 201.

[0024] In an embodiment of the present invention, the upper box body 101 is installed with the equipment required for measurement. Access members 9 communicated with them are fixed on both the top sealing member 2 and the bottom sealing member 201. The measuring equipment is connected to the access member 9 through a pipe fitting, and the circuit end of the measuring equipment establishes communication with a controller 102 fixed on the box body 1.

[0025] When measuring, manually open the box door 103, then place the end of the proton exchange membrane body 8 on the upper membrane assembly, and drive the proton exchange membrane body 8 to move into the box body 1 through the upper membrane assembly until the proton exchange membrane body 8 completely covers the open part of the bottom sealing member 201. Subsequently, drive the top sealing member 2 to move towards the bottom sealing member 201 through the pressing assembly.

[0026] During the descent process, first, the first pressing ring 4 presses the proton exchange membrane body 8 at the open position of the bottom sealing member 201, causing the proton exchange membrane body 8 to form a state of central depression. As the top sealing member 2 descends, after the first pressing ring 4 finishes pressing the proton exchange membrane body 8, the bottom of the L-shaped plate 404 abuts against the pressed portion 207, and the pressed portion 207 limits the L-shaped plate 404. The subsequent movement is actually that the L-shaped plate 404 and the first pressing ring 4 stop moving, and the top sealing member 2 continues to move towards the bottom sealing member 201. This state is that the L-shaped plate 404 and the first pressing ring 4 move relative to the top sealing member 2, that is, the L-shaped plate 404 and the first pressing ring 4 move into the top sealing member 2 simultaneously.

[0027] When the L-shaped plate 404 moves, it drives the second guide rod 402 to move accordingly, and at the same time compresses the spring 403, so that the spring 403 stores elastic potential energy while undergoing compression deformation.

[0028] Among them, the bottom of the first pressing ring 4 is provided with an airbag. In the initial state, the airbag expands, making the part of the first pressing ring 4 protruding from the top sealing member 2 longer than the L-shaped plate 404. When pressing the proton exchange membrane body 8 through the first pressing ring 4, it is actually pressing through this airbag.

[0029] When the L-shaped plate 404 rises relative to the top sealing member 2, a negative pressure area is formed in the second movable groove 501, and this negative pressure area is connected to the airbag through a pipe fitting. When the negative pressure area is generated, the gas in the airbag is sucked into the negative pressure area through the pipe fitting, so that the bottom of the first pressing ring 4 is parallel to the bottom of the L-shaped plate 404. In this way, when the top sealing member 2 abuts against the top of the bottom sealing member 201, it will not continuously press the proton exchange membrane body 8 due to the airbag.

[0030] Simply put, when the airbag bulges, the bottom of the first pressing ring 4 protrudes a part compared to the L-shaped plate 404; after the top sealing member 2 and the bottom sealing member 201 abut, the gas in the airbag is sucked out through the negative pressure formed in the second movable groove 501, so that the abutting point of the top sealing member 2 and the bottom sealing member 201, the bottom of the first pressing ring 4, and the bottom of the L-shaped plate 404 are at the same height. Furthermore, when the top sealing member 2 and the bottom sealing member 201 abut, the central part of the proton exchange membrane body 8 can be pressed.

[0031] When the top sealing member 2 rises, the elastic potential energy stored in the spring 403 is released to drive the L-shaped plate 404 to descend, and then the gas in the negative pressure area is squeezed into the airbag of the first pressing ring 4.

[0032] After the top sealing member 2 and the bottom sealing member 201 abut, the proton exchange membrane body 8 is compacted through a compaction structure, so that the proton exchange membrane body 8 is tightened to an appropriate tension.

[0033] Finally, the controller 102 controls the measuring device to measure.

[0034] It should also be noted that grooves 502 are provided at the bottoms of both of the two integration parts 203, and a contact piece is fixed to the bottom of the L-shaped plate 404. This design can increase the contact surface when the L-shaped plate 404 contacts the pressure-receiving part 207, making it more stable; and the function of the groove 502 is to accommodate the contact piece.

[0035] A third movable groove 6 is also formed at the bottom of the top seal 2. A second pressing ring 601 that abuts against the bottom seal 201 is slidably installed in the third movable groove 6, and the second pressing ring 601 cooperates with the upper film assembly.

[0036] In the embodiment of the present invention, the second pressing ring 601 is slidably connected to the third movable groove 6, that is, slidably connected to the top seal 2, and abuts against the bottom seal 201. When the top seal 2 descends, a sliding relationship is generated between the third movable groove 6 and the second pressing ring 601, but the position of the second pressing ring 601 remains unchanged.

[0037] One end of the proton exchange membrane body 8 is pulled forward by the upper film assembly, so that the proton exchange membrane body 8 advances under the bottom of the second pressing ring 601. In this process, the proton exchange membrane body 8 is actually located between the bottom seal 201 and the second pressing ring 601, and the second pressing ring 601 applies a pressure to the proton exchange membrane body 8 by virtue of its own gravity.

[0038] Meanwhile, during the advancement of the proton exchange membrane body 8, the second pressing ring 601 levels the proton exchange membrane body 8 to prevent the proton exchange membrane body 8 from wrinkling.

[0039] When the proton exchange membrane body 8 finishes film application, the third movable groove 6 is still in a state of pressing the proton exchange membrane body 8. When the first pressing ring 4 presses the proton exchange membrane body 8, the central part of the proton exchange membrane body 8 is indented due to the force. When the proton exchange membrane body 8 is indented, to prevent the proton exchange membrane body 8 from rebounding when the pressing force disappears, the second pressing ring 601 presses the proton exchange membrane body 8 so that it cannot rebound.

[0040] 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 in the bottom seal 201, and a rubber layer is fixed to the pressing block 7.

[0041] In the embodiment of the present invention, when the top seal 2 descends, it drives the pressing block 7 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 at the same time, the proton exchange membrane body 8 is pressed into the pressing groove 701.

[0042] Before this process, the central part of the proton exchange membrane body 8 is pressed and indented, and this indented part is for compensation when the pressing block 7 presses the proton exchange membrane body 8 into the pressing groove 701.

[0043] Compared with the existing laminating equipment, when the pressing block 7 presses the proton exchange membrane body 8 into the pressing groove 701, it will not apply tension to the proton exchange membrane body 8, resulting in excessive tension of the proton exchange membrane body 8 and causing deviation in the measurement effect. In the present invention, before laminating, the center of the proton exchange membrane body 8 is pressed, so that the proton exchange membrane body 8 is recessed with a margin when it is pressed into the pressing groove 701, so as to offset the excessive tension when the proton exchange membrane body 8 is pressed into the pressing groove 701, so that the measured tension of the proton exchange membrane body 8 will not be too large.

[0044] The laminating assembly includes four lead screws 205 rotatably installed on both sides of the bottom sealing member 201. Threaded sleeves 204 that are threadedly engaged with the lead screws 205 are sleeved on the four lead screws 205, and the four threaded sleeves 204 are fixed to the top sealing member 2.

[0045] Driven gears 208 are coaxially fixed to the bottom ends of the four lead screws 205. The driven gears 208 are engaged with a toothed ring 209 rotatably installed on the base 104, and an anti-slip ring 2010 is fixed to the edge of the toothed ring 209.

[0046] In the embodiment of the present invention, when measuring, the box door 103 is opened, and the proton exchange membrane body 8 is placed on the upper film assembly. After the upper film operation is completed by the upper film assembly, the anti-slip ring 2010 and the toothed ring 209 are manually driven to rotate. When the toothed ring 209 rotates, it will synchronously drive the four driven gears 208 to rotate; when the driven gears 208 rotate, they will synchronously drive the corresponding lead screws 205 to rotate; when the lead screws 205 rotate, through the threaded engagement with the threaded sleeves 204, the threaded sleeves 204 and the top sealing member 2 are driven to vertically descend. After the measurement is completed, the anti-slip ring 2010 and the toothed ring 209 are rotated in the reverse direction, and the corresponding top sealing member 2 will vertically rise.

[0047] Secondly, in this embodiment, the anti-slip ring 2010 is used to increase the friction force when driving the toothed ring 209. Of course, the toothed ring 209 can also be driven to rotate by a motor, and manual driving or motor driving can be selected according to actual production requirements.

[0048] It should be noted that since this embodiment uses the threaded engagement of the lead screw 205 and the threaded sleeve 204 to drive the top sealing member 2 to vertically descend and rise, as is well known, the force required for screw transmission is small, so a large force is not required to drive the toothed ring 209.

[0049] The upper film assembly includes two brackets 3 fixed to the base 104, and the two brackets 3 are respectively located on both sides of the bottom sealing member 201.

[0050] Two conveying rollers 305 are rotatably installed on each of the two brackets 3. The two conveying rollers 305 on one side are connected by a conveyor belt 304. An adsorption block 301 is fixed between the two conveyor belts 304, and adsorption holes 303 are provided at the bottom of the adsorption block 301.

[0051] The shape of the adsorption block 301 is an isosceles triangle.

[0052] When the adsorption block 301 moves horizontally to contact the second pressing ring 601, since the adsorption block 301 is an isosceles triangle, its top is two inclined surfaces. Through these inclined surfaces, the second pressing ring 601 can be driven to rise vertically. Whether moving forward or backward, the second pressing ring 601 can be driven to rise and make way for the adsorption block 301 to pass through.

[0053] In the embodiment of the present invention, motors 307 are fixed on both sides of a single bracket 3. The output shaft of the motor 307 is connected to the conveying roller 305 through a bevel gear set 306. When the motor 307 works, its output shaft drives the two conveying rollers 305 on the bracket 3 to rotate synchronously through the bevel gear set 306. 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, so as to make the two conveyor belts 304 convey synchronously; when the two conveyor belts 304 convey synchronously, the adsorption block 301 is driven to move horizontally.

[0054] Wherein, the adsorption block 301 is provided with a cavity inside. The cavity is connected to a micro negative pressure device through a pipe fitting, or the micro negative pressure device is integrated into the cavity.

[0055] When performing the film covering operation, the conveyor belt 304 is driven to move to one 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 is generated in the cavity by the negative pressure device, and the adsorption holes 303 at the bottom of the conveyor belt 304 generate suction force through this negative pressure, so as to adsorb one end of the proton exchange membrane body 8 to the bottom of the adsorption block 301. Finally, by driving the conveyor belt 304 to move in the direction away from the box door 103, the proton exchange membrane body 8 is driven to cover the bottom sealing member 201.

[0056] Wherein, when the conveyor belt 304 moves to contact the second pressing ring 601, the second pressing ring 601 is driven to rise, so that the proton exchange membrane body 8 passes through the bottom of the second pressing ring 601.

[0057] It should also be noted that the bevel gear set 306 includes two meshing bevel gears, and the two bevel gears are coaxially fixed to the motor 307 and the conveying roller 305 respectively.

[0058] A through hole is provided at the bottom of one of the brackets 3 close to the box door 103, and the through hole is at the bottom of the bracket 3.

[0059] By opening a through groove at the bottom of the bracket 3, the arm can pass through when manually driving the gear ring 209 and the anti-slip ring 2010 to rotate. Of course, in the case of motor drive, the through port may not be provided.

[0060] A leveling part 302 is fixed on a bracket 3 close to one side of the box door 103, and the top of the leveling part 302 is parallel to the top of the bottom sealing part 201.

[0061] In the embodiment of the present invention, manually flatten the proton exchange membrane body 8 and place it on the leveling part 302, and push it forward a certain distance after flattening. Then, adsorb the end of the proton exchange membrane body 8 through the adsorption block 301, and perform the film loading work through the horizontal movement of the adsorption block 301.

[0062] A through groove 308 for the conveyor belt 304 to pass through is opened on the bottom sealing part 201; The distance between the bottom of the adsorption block 301 and the top of the bottom sealing part 201 is 0.1 cm.

[0063] In the embodiment of the present invention, through this design, while the conveyor belt 304 does not affect the abutment of the top sealing part 2 and the bottom sealing part 201, the adsorption block 301 can move horizontally along the top of the bottom sealing part 201, and the distance between the adsorption block 301 and the bottom sealing part 201 is greater than the thickness of the proton exchange membrane body 8. Of course, when the thickness of the proton exchange membrane body 8 increases, the distance between the bottom sealing part 201 and the adsorption block 301 also increases correspondingly. In the present invention, the distance between the adsorption block 301 and the bottom sealing part 201 is limited to 0.1 cm, that is, the thickness of the proton exchange membrane body 8 is less than 0.1 cm.

[0064] A plurality of secondary pressing grooves 702 are opened on the inner wall of the pressing groove 701, and the secondary pressing grooves 702 are evenly distributed in a circumferential manner.

[0065] In the embodiment of the present invention, when the pressing block 7 presses the proton exchange membrane body 8 into the pressing groove 701, when the pressing groove 701 is stressed, the rubber layer on its surface will deform to be extruded into the secondary pressing groove 702. Through the deformation extrusion of the rubber layer in this process, the proton exchange membrane body 8 will enter the secondary pressing groove 702, thereby further increasing the friction force and improving the stability of pressing.

[0066] The present invention also provides a method for measuring the hydrogen permeability of a proton exchange membrane based on the isobaric method. Using the above-mentioned device for measuring the hydrogen permeability of a proton exchange membrane based on the isobaric method, it includes the following steps: Step 1: Manually open the box door 103, and then flatten and place the proton exchange membrane body 8 on the leveling part 302; Step 2: The membrane loading assembly completes the membrane loading work of the proton exchange membrane body 8, enabling the proton exchange membrane body 8 to cover the bottom sealing member 201. Then, the pressing assembly drives the top sealing member 2 to descend. When the top sealing member 2 descends to the end of the stroke, the pressing and tightening assembly fixes and tightens the proton exchange membrane body 8. Step 3: After the measurement is completed, the pressing assembly drives the top sealing member 2 to ascend, and the proton exchange membrane body 8 that has completed the measurement is taken out.

Claims

1. A proton exchange membrane hydrogen permeability measurement device based on the 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 at the bottom of the box body (1), and a box opening is provided on one side of the box body (1), and a box door (103) is installed at the box opening, characterized in that, Further included are: A bottom seal (201) fixed to the base (104), with a first guide rod (202) installed on both sides thereof; A top seal (2), with a guide sleeve (206) slidably engaged with the first guide rod (202) fixed on both sides of the top seal (2). The top seal (2) and the bottom seal (201) are connected by a pressing assembly, and an integrated part (203) is fixed on both sides of the top seal (2); A second movable groove (501) is formed in each of the two integrated parts (203). One side of the two second movable grooves (501) communicates with the bottom seal (201). A first movable groove (5) communicating therewith is formed at the top of the second movable groove (501), and a fourth movable groove is formed at the bottom of the second movable groove (501); Two L-shaped plates (404) are respectively slidably installed in the two fourth movable grooves, and a plugging plate (401) fixed to the L-shaped plate (404) is slidably installed on the inner wall of the top seal (2). A first pressing ring (4) fixed to the two plugging plates (401) is installed in the top seal (2); Wherein, the bottoms of the L-shaped plate (404) and the first pressing ring (4) both protrude beyond the bottom end of the top seal (2); Two pressure-receiving parts (207) fixed to both sides of the bottom seal (201) and cooperating with the L-shaped plate (404); A second guide rod (402) 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 opposite sides of the top seal (2) and the bottom seal (201); An upper film assembly installed on the base (104) for pulling the proton exchange membrane body (8) to cover the open part of the bottom seal (201).

2. The proton exchange membrane hydrogen permeability measurement device based on the isobaric method according to claim 1, characterized in that: A third movable groove (6) is further formed at the bottom of the top seal (2), and a second pressing ring (601) abutted against the bottom seal (201) is slidably installed in the third movable groove (6), and the second pressing ring (601) cooperates with the upper film assembly.

3. The proton exchange membrane hydrogen permeability measurement device based on the isobaric method according to claim 2, characterized in that: 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); 4. The proton exchange membrane hydrogen permeability measurement device based on the isobaric method according to claim 3, characterized in that: The pressing assembly includes four lead screws (205) rotatably installed on both sides of the bottom seal (201). Threaded sleeves (204) threadedly engaged with the lead screws are sleeved on the four lead screws (205), and the four threaded sleeves (204) are all fixed to the top seal (2); The bottom ends of the four lead screws (205) are coaxially fixed with driven gears (208), the driven gears (208) are meshed with a toothed ring (209) rotatably installed on the base (104), and an anti-slip ring (2010) is fixed to the edge of the toothed ring (209); 5. The proton exchange membrane hydrogen permeability measurement device based on the isobaric method according to claim 1, characterized in that: The upper film assembly includes two brackets (3) fixed to 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 each of the two brackets (3). The two conveying rollers (305) on one side are connected by a conveyor belt (304). An adsorption block (301) is fixed between the two conveyor belts (304). Adsorption holes (303) are provided at the bottom of the adsorption block (301). A through hole is provided at the bottom of one bracket (3) close to the box door (103), and the through hole is at the bottom of the bracket (3).

6. The proton exchange membrane hydrogen permeability measurement device based on the isobaric method according to claim 5, characterized in that: A through groove (308) for the conveyor belt (304) to pass through is formed in the bottom sealing member (201). The distance between the bottom of the adsorption block (301) and the top of the bottom sealing member (201) is 0.1 cm.

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

8. The proton exchange membrane hydrogen permeability measurement device based on the isobaric method according to claim 3, characterized in that: A plurality of secondary pressing grooves (702) are formed in the inner wall of the pressing groove (701), and the secondary pressing grooves (702) are equidistantly distributed in a circular shape.

9. The proton exchange membrane hydrogen permeability measurement device based on the isobaric method according to claim 5, characterized in that: A leveling part (302) is fixed on one bracket (3) close to the box door (103), and the top of the leveling part (302) is parallel to the top of the bottom sealing member (201).

10. A measuring method of the proton exchange membrane hydrogen permeability measuring device based on the isobaric method according to any one of claims 1-9, characterized in that: It includes the following steps: Step 1: Manually open the box door (103), and then lay the proton exchange membrane body (8) flat on the leveling part (302). Step 2: The upper film assembly completes the upper film work of the proton exchange membrane body (8), so that the proton exchange membrane body (8) covers the bottom sealing member (201). Then, the pressing assembly drives the top sealing member (2) to descend. When the top sealing member (2) descends to the end of the stroke, the proton exchange membrane body (8) is fixed and tightened by the pressing component. Step 3: After the measurement is completed, the pressing assembly drives the top sealing member (2) to rise, and the proton exchange membrane body (8) that has completed the measurement is taken out.

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