Hydrogen fuel cell membrane electrode production device

Abstract

The invention belongs to the technical field of hydrogen fuel cell membrane electrode production, and discloses a hydrogen fuel cell membrane electrode production device which comprises a base, a fixing frame and a catalyst spraying mechanism, an unwinding roller, a first conveying roller, a first support, a second support, a heater, a second conveying roller and a winding roller are sequentially installed on the top of the base from left to right in the conveying direction of the proton exchange membrane, and a first rotating roller and an indirect roller are sequentially and rotationally installed on the inner wall of the first support from bottom to top. The device is driven by the rotating drum to continuously rotate along with the scraping plate, the scraping plate gradually leaves the magnetic force acting area of the permanent magnet, at the moment, the spring quickly pulls the scraping plate towards the inner side of the limiting groove and cooperates with the surface of the rotating drum to throw the catalyst coating scraped off from the surface of the scraping plate to the upper surface of the proton exchange membrane under the centrifugal effect generated by high-speed rotation of the rotating drum, and then the proton exchange membrane is formed. Therefore, the function of quickly recycling the catalyst residues on the surface of the indirect roller is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen fuel cell membrane electrode production, and specifically relates to a hydrogen fuel cell membrane electrode production device. Background Art

[0002] There are two sources of power for new energy vehicles. One is solid-state batteries with lithium as the core, and the other is hydrogen fuel cells with hydrogen as the core. Compared with lithium batteries, hydrogen fuel cells are more environmentally friendly and easy to obtain. In the future, they are expected to replace lithium batteries as the main energy source. The production of hydrogen energy battery membrane electrode is a key link in the manufacturing process of hydrogen fuel cells. The membrane electrode is the core component of the proton exchange membrane (PEM) fuel cell. It consists of a proton exchange membrane, a catalytic layer electrode and a gas diffusion layer. The proton exchange membrane is a special membrane material with excellent proton conductivity. The proton exchange membrane needs to be coated with a layer of catalyst on the surface to catalyze the chemical reaction of hydrogen and oxygen and generate electricity. In the prior art, the catalyst is generally coated by indirect roller pressing, that is, a rotating roller is used to roll with the proton exchange membrane through rotation. Abutment, and then use a special container to spray the catalyst on the surface of the roller, so that when the roller contacts the proton exchange membrane, a uniform layer of catalyst will be coated on the surface of the proton exchange membrane to achieve a coating effect, but this design has certain defects. The catalyst passing through the roller surface cannot be completely moved to the surface of the proton exchange membrane, and a part of the catalyst will inevitably remain on the roller surface, causing waste, and the catalyst attached to the roller surface will make the roller surface uneven due to the residue, which makes the catalyst sprayed onto the roller surface later appear unevenly distributed. When it acts on the proton exchange membrane, the coated catalyst layer will be unevenly distributed. The prior art only uses physical scraping means to recover the catalyst, and cannot directly act on the surface of the proton exchange membrane, which not only complicates the catalyst use path, but also increases the production cost. Summary of the invention

[0003] The object of the present invention is to provide a hydrogen fuel cell membrane electrode production device to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydrogen fuel cell membrane electrode production device, comprising a base, a fixing frame and a catalyst spraying mechanism, wherein the top of the base is provided with an unwinding roller, a transport roller 1, a bracket 1, a bracket 2, a heater, a transport roller 2 and a winding roller in sequence from left to right along the transport direction of the proton exchange membrane, the inner wall of the bracket 1 is provided with a rotating roller 1 and an indirect roller in sequence from bottom to top, the inner wall of the bracket 2 is provided with a rotating roller 2 and a fixed shaft in sequence from bottom to top, a motor for driving the indirect roller is provided on the front of the bracket 1, a rotating drum is rotatably provided on the outer surface of the fixed shaft, transmission wheels 2 are provided at both ends of the rotating drum, and the indirect A driving wheel 1 is installed at both ends of the roller, and a belt is connected between the driving wheel 1 and the driving wheel 2. A placement groove is provided on the inner ring surface of the rotating drum, and two groups of through grooves are symmetrically provided on the inner wall of the placement groove. Two groups of limiting grooves connected with the through grooves are provided on the outer surface of the rotating drum. A permanent magnet located in the placement groove is fixedly installed on the outer surface of the fixed shaft, a scraper is movably clamped on the inner wall of the limiting groove, a placement hole is provided on the inner side of the scraper, and a spring 1 is movably sleeved on the inner wall of the placement hole, and two ends of the spring 1 are elastically connected to the scraper and the limiting groove respectively. The rotating roller 2 is rotatably installed on the left side of the inner wall of the bracket 2, and the fixed shaft is fixedly installed on the top of the inner wall of the bracket 2.

[0005] As a preferred embodiment of the present invention, the proton exchange membrane passes through the transport roller 1, between the indirect roller and the rotating roller 1, between the indirect roller and the rotating roller 2, the rotating drum, the heater, the transport roller 2 from the outer surface of the unwinding roller in sequence, and is finally rolled up in the winding roller. The fixed frame is fixedly installed on the rear side of the top of the base, and the catalyst spraying mechanism is installed on the top of the inner wall of the fixed frame and is directly opposite to the top of the indirect roller.

[0006] As a preferred solution of the present invention, the roller one is located directly below the indirect roller, the roller two is located on the right side of the bottom of the roller one, the fixed shaft and the rotating drum are located on the right side of the indirect roller and on the upper right side of the roller two.

[0007] As a preferred solution of the present invention, a connecting frame is fixedly installed on the left side of the heater, and a plurality of groups of pillars are fixedly connected to the left side of the connecting frame. A connecting block is slidably installed on the outer surface of the pillar, and a slot for sliding the pillar is provided inside the connecting block. A second spring located in the slot is movably sleeved on the outer surface of the pillar, and both ends of the second spring are elastically connected to the slot and the pillar respectively. A protective cylinder is fixedly connected to the bottom of the connecting block, and the protective cylinder covers the outer surface of the rotating cylinder. A plurality of groups of protrusions equidistantly distributed in a circle are fixedly connected to the inner wall of the protective cylinder.

[0008] As a preferred solution of the present invention, the right bottom of the protective tube is a straight structure with an inclined buffer portion on the left side, the left side of the protective tube is a semicircular ring structure concentrically distributed with the rotating drum, and the outer side of the scraper abuts against the inner wall of the protective tube.

[0009] As a preferred solution of the present invention, the permanent magnet is an arc structure with a physical opening and closing angle of 135°. When the scraper rotates around the axis of the fixed shaft to the incomplete part of the permanent magnet, it is not affected by the magnetic attraction of the permanent magnet and can be completely pulled into the limit groove by the spring.

[0010] As a preferred solution of the present invention, the protrusion is located on the inner wall of the arc portion of the protective tube, and the cross-sectional shape of the protrusion is semicircular.

[0011] As a preferred solution of the present invention, the size of the transmission wheel 1 is larger than that of the transmission wheel 2, and the rotation directions of the indirect roller and the transmission wheel 2 are both counterclockwise.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. After optimization and upgrading, this device can quickly recover the catalyst coating remaining on the surface of the indirect roller and use it on the surface of the proton exchange membrane. A fixed shaft is provided at the lower right side of the indirect roller, and a drum is rotatably installed on the outer surface of the fixed shaft. The outer surface of the indirect roller is scraped by the drum to remove the coating residue on the surface of the indirect roller. The indirect roller and the drum are connected in the form of speed-increasing transmission through the transmission wheel 1, the belt and the transmission wheel 2. When the indirect roller rotates counterclockwise and coats the upper surface of the proton exchange membrane, when it passes through the surface with coating residue and moves to the side facing the drum, the drum drives the scraper to rotate counterclockwise at a higher speed, and the scraper is pulled to the inside of the limit groove by the spring 1. When the scraper is driven upward by the drum and moves to the magnetic action area corresponding to the solid part of the permanent magnet, the scraper is pushed to the outside of the limiting groove by the magnetic repulsion generated by the permanent magnet on the scraper, so that the outer side of the scraper is always in a protruding state when facing the indirect roller, and the scraping function of the outer surface of the indirect roller is realized. At the same time, as the scraper continues to rotate driven by the drum, the scraper gradually leaves the magnetic action area of ​​the permanent magnet. At this time, the spring quickly pulls the scraper to the inside of the limiting groove, and cooperates with the surface of the drum to "throw" the catalyst coating scraped off the scraper surface to the upper surface of the proton exchange membrane under the centrifugal action generated by the high-speed rotation of the drum, thereby realizing the function of quickly recovering the catalyst residue on the surface of the indirect roller.

[0014] 2. The device is also provided with a protective cylinder located on the outside of the rotating drum to further smooth the upper surface of the proton exchange membrane. A connecting frame and a pillar fixed to the side of the heater are provided, so that the outer surface of the pillar is slidably installed with a connecting block and a protective cylinder. When the scraper rotates with the rotating drum to abut against the inner wall of the protective cylinder, the scraper squeezes the protrusions through the multiple groups of protrusions provided on the inner wall of the protective cylinder, and pushes the protective cylinder and the connecting block to move right as a whole, and stretches the second spring. When the outer side of the scraper passes over the protrusion, the second spring drives the connecting block and the protective cylinder to reset to the left, so that the protective cylinder as a whole has the function of reciprocating left and right motion. Combined with the inclined transition design at the bottom of the right side of the protective cylinder, the upper surface of the proton exchange membrane is smoothed by the reciprocating protective cylinder when passing under the protective cylinder, so that the catalyst coating on the surface of the proton exchange membrane is more evenly distributed.

[0015] 3. This device fixes the fixed shaft and the permanent magnet, so that the rotating drum is synchronously driven by the indirect roller through the transmission wheel 2, the belt and the transmission wheel 1, and the rotating drum drives the scraper to scrape the outer surface of the indirect roller, and forms a strong centrifugal effect with the ultra-fast rotation speed of the rotating drum. The centrifugal effect can directly cause the catalyst coating remaining on the surface of the indirect roller scraped by the scraper to be "thrown" obliquely downward along the rotation tangent of the scraper to the surface of the proton exchange membrane, and help to make up for the part of the proton exchange membrane surface that has not been fully coated, and has the effect of checking and filling the gaps of the catalyst coating on the surface of the proton exchange membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the front appearance of the overall structure of the present invention;

[0017] Figure 2 It is a front cutaway schematic diagram of the overall structure of the present invention;

[0018] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at center A;

[0019] Figure 4 It is a front perspective schematic diagram of the overall structure of the present invention;

[0020] Figure 5 It is a partial separation schematic diagram of the first rotating roller, the second rotating roller, the fixed shaft, the indirect roller, the motor, the first transmission wheel, the belt, the second transmission wheel, the rotating drum, the connecting frame and the protective drum of the present invention;

[0021] Figure 6 It is a schematic diagram of the internal section of the belt, the second transmission wheel and the rotating drum of the present invention;

[0022] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at B in the middle;

[0023] Figure 8For the present invention Figure 6 A magnified schematic diagram of the structure at C in the middle;

[0024] Fig. 9 It is a schematic diagram of the separation of the fixed shaft, the rotating drum, the permanent magnet, the scraper and the spring 1 of the present invention;

[0025] Fig.10 It is a schematic diagram of the internal partial section of the fixed shaft and the rotating drum of the present invention.

[0026] In the figure: 1. base; 2. fixed frame; 3. catalyst spraying mechanism; 4. unwinding roller; 5. transport roller 1; 6. bracket 1; 7. bracket 2; 8. heater; 9. transport roller 2; 10. winding roller; 11. rotating roller 1; 12. rotating roller 2; 13. fixed shaft; 14. indirect roller; 15. motor; 16. transmission wheel 1; 17. belt; 18. transmission wheel 2; 19. rotating drum; 20. connecting frame; 21. protective cylinder; 22. proton exchange membrane; 23. bump; 24. placement groove; 25. through groove; 26. limiting groove; 27. permanent magnet; 28. scraper; 29. ​​placement hole; 30. spring 1; 31. pillar; 32. connecting block; 33. slot; 34. spring 2. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 10As shown, an embodiment of the present invention provides a hydrogen fuel cell membrane electrode production device, including a base 1, a fixing frame 2 and a catalyst spraying mechanism 3. The top of the base 1 is provided with an unwinding roller 4, a transport roller 1 5, a bracket 1 6, a bracket 2 7, a heater 8, a transport roller 2 9 and a winding roller 10 in sequence from left to right along the transport direction of the proton exchange membrane 22. The inner wall of the bracket 1 6 is provided with a rotating roller 11 and an indirect roller 14 in sequence from bottom to top. The inner wall of the bracket 2 7 is provided with a rotating roller 2 12 and a fixed shaft 13 in sequence from bottom to top. The front of the bracket 1 6 is provided with a motor 15 for driving the indirect roller 14. The outer surface of the fixed shaft 13 is provided with a rotating drum 19 in rotation. Both ends of the rotating drum 19 are provided with a transmission wheel 2 18. Both ends of the indirect roller 14 are provided with There is a driving wheel 16, and a belt 17 is connected between the driving wheel 16 and the driving wheel 2 18. The inner ring surface of the rotating drum 19 is provided with a placement groove 24, and the inner wall of the placement groove 24 is symmetrically provided with two groups of through grooves 25. The outer surface of the rotating drum 19 is provided with two groups of limiting grooves 26 connected with the through grooves 25. The outer surface of the fixed shaft 13 is fixedly installed with a permanent magnet 27 located in the placement groove 24, and the inner wall of the limiting groove 26 is movably connected with a scraper 28, and a placement hole 29 is provided on the inner side of the scraper 28. The inner wall of the placement hole 29 is movably sleeved with a spring 1 30, and the two ends of the spring 1 30 are elastically connected with the scraper 28 and the limiting groove 26 respectively. The rotating roller 2 12 is rotatably installed on the left side of the inner wall of the bracket 2 7, and the fixed shaft 13 is fixedly installed on the top of the inner wall of the bracket 2 7;

[0029] After optimization and upgrading, the device can quickly recover the catalyst coating remaining on the surface of the indirect roller 14 and use it on the surface of the proton exchange membrane 22. A fixed shaft 13 is provided at the lower right side of the indirect roller 14, and a drum 19 is rotatably installed on the outer surface of the fixed shaft 13. The outer surface of the indirect roller 14 is scraped by the drum 19 to remove the coating residue on the surface of the indirect roller 14. The indirect roller 14 and the drum 19 are connected in the form of a speed-increasing transmission through a transmission wheel 16, a belt 17 and a transmission wheel 2 18. When the indirect roller 14 rotates counterclockwise and coats the upper surface of the proton exchange membrane 22, when it passes through the surface of the coating residue and moves to the side facing the drum 19, the drum 19 drives the scraper 28 to rotate counterclockwise at a higher speed, and uses a spring 1 30 to pull the scraper 28 to the inner side of the limit groove 26. When When the scraper 28 is driven upward by the drum 19 and moves to the magnetic action area corresponding to the solid part of the permanent magnet 27, the scraper 28 is pushed toward the outside of the limiting groove 26 by the magnetic repulsion generated by the permanent magnet 27 on the scraper 28, so that the outer side of the scraper 28 is always in a protruding state when facing the indirect roller 14, and the scraping function of the outer surface of the indirect roller 14 is realized. At the same time, as the scraper 28 is driven by the drum 19 to continue to rotate, the scraper 28 gradually leaves the magnetic action area of ​​the permanent magnet 27. At this time, the spring 130 quickly pulls the scraper 28 toward the inside of the limiting groove 26, and cooperates with the surface of the drum 19 to "throw" the catalyst coating scraped off the surface of the scraper 28 to the upper surface of the proton exchange membrane 22 under the centrifugal action generated by the high-speed rotation of the drum 19, thereby realizing the function of quickly recovering the catalyst residue on the surface of the indirect roller 14.

[0030] The device fixes the fixed shaft 13 and the permanent magnet 27, so that the rotating drum 19 is synchronously driven by the indirect roller 14 through the transmission wheel 2 18, the belt 17 and the transmission wheel 1 16, and the rotating drum 19 drives the scraper 28 to scrape the outer surface of the indirect roller 14, and forms a strong centrifugal effect with the ultra-fast rotation speed of the rotating drum 19. The centrifugal effect can directly cause the catalyst coating remaining on the surface of the indirect roller 14 scraped off by the scraper 28 to be "thrown" obliquely downward along the rotation tangent of the scraper 28 to the surface of the proton exchange membrane 22, and help to make up for the part of the surface of the proton exchange membrane 22 that has not been fully coated, and has the effect of checking and filling the gaps of the catalyst coating on the surface of the proton exchange membrane 22.

[0031] The proton exchange membrane 22 passes through the transport roller 1 5, between the indirect roller 14 and the rotating roller 11, between the indirect roller 14 and the rotating roller 2 12, the rotating drum 19, the heater 8, the transport roller 2 9 from the outer surface of the unwinding roller 4 in sequence, and is finally rolled up in the winding roller 10. The fixing frame 2 is fixedly installed on the rear side of the top of the base 1, and the catalyst spraying mechanism 3 is installed on the top of the inner wall of the fixing frame 2 and is directly opposite to the top of the indirect roller 14.

[0032] The transport roller 1 5 and the transport roller 2 9 are responsible for driving the proton exchange membrane 22 to move along the transport direction. When the proton exchange membrane 22 passes through the area between the indirect roller 14, the rotating roller 11 and the rotating roller 2 12, the upper surface of the proton exchange membrane 22 is coated by the indirect roller 14.

[0033] The first roller 11 is located directly below the indirect roller 14, the second roller 12 is located on the right side of the bottom of the first roller 11, the fixed shaft 13 and the rotating drum 19 are located on the right side of the indirect roller 14 and on the upper right side of the second roller 12;

[0034] The first roller 11 and the second roller 12 cooperate with the indirect roller 14 to form an arc in the coating area of ​​the proton exchange membrane 22, thereby effectively increasing the coating area of ​​the proton exchange membrane 22.

[0035] The left side of the heater 8 is fixedly mounted with a connecting frame 20, and the left side of the connecting frame 20 is fixedly connected with a plurality of pillars 31, and the outer surface of the pillar 31 is slidably mounted with a connecting block 32, and a slot 33 for the pillar 31 to slide is provided inside the connecting block 32, and the outer surface of the pillar 31 is movably sleeved with a spring 2 34 located in the slot 33, and the two ends of the spring 2 34 are elastically connected to the slot 33 and the pillar 31 respectively, and the bottom of the connecting block 32 is fixedly connected with a protective cylinder 21, and the protective cylinder 21 covers the outer surface of the rotating cylinder 19, and the inner wall of the protective cylinder 21 is fixedly connected with a plurality of convex blocks 23 distributed equidistantly around the circumference;

[0036] The device is also provided with a protective cylinder 21 located outside the rotating cylinder 19 to further smooth the upper surface of the proton exchange membrane 22. The connecting frame 20 and the support 31 fixed to the side of the heater 8 are provided, and the outer surface of the support 31 is slidably installed with the connecting block 32 and the protective cylinder 21. When the scraper 28 rotates with the rotating cylinder 19 to abut against the inner wall of the protective cylinder 21, the scraper 28 squeezes the protrusions 23 through the multiple groups of protrusions 23 provided on the inner wall of the protective cylinder 21, and pushes the protective cylinder 21 and the connecting block 32 to the inner wall of the protective cylinder 21. The connecting block 32 moves to the right as a whole and stretches the spring 2 34. When the outer side of the scraper 28 passes over the protrusion 23, the spring 2 34 drives the connecting block 32 and the protective tube 21 to return to the left, so that the protective tube 21 as a whole has the function of reciprocating left and right motion. Combined with the inclined transition design at the right bottom of the protective tube 21, the upper surface of the proton exchange membrane 22 is smoothed by the reciprocating protective tube 21 when passing under the protective tube 21, so that the catalyst coating on the surface of the proton exchange membrane 22 is more evenly distributed.

[0037] The bottom right side of the protective tube 21 is a straight structure with an inclined buffer portion on the left side, the left side of the protective tube 21 is a semicircular ring structure concentrically distributed with the rotating drum 19, and the outer side of the scraper 28 abuts against the inner wall of the protective tube 21;

[0038] The bottom of the protective tube 21 has a downward sloping transition design, which allows the catalyst coating applied on the surface of the proton exchange membrane 22 passing thereunder to be smoothed out and is smoothed again on the horizontal part on the right side of the protective tube 21, which helps to evenly set the catalyst coating applied on the surface of the proton exchange membrane 22.

[0039] The permanent magnet 27 is a circular arc structure with a physical opening and closing angle of 135°. When the scraper 28 rotates around the axis of the fixed shaft 13 to the incomplete part of the permanent magnet 27, it is not affected by the magnetic attraction of the permanent magnet 27 and can be completely pulled into the limiting groove 26 by the spring 1 30.

[0040] The inner side of the scraper 28 is made of a permanent magnetic material having the same magnetic properties as the outer ring surface of the permanent magnet 27. When the scraper 28 moves to the annular coverage area of ​​the permanent magnet 27, it will be pushed toward the outside of the limiting groove 26 by the magnetic repulsive force generated by the permanent magnet 27. Since the rotation speed of the drum 19 that drives the scraper 28 to rotate is higher than that of the indirect roller 14, the scraper 28 can completely scrape the outer surface of the indirect roller 14 to remove the residue on its surface.

[0041] The protrusion 23 is located on the inner wall of the arc portion of the protective tube 21, and the cross-sectional shape of the protrusion 23 is semicircular;

[0042] The function of the protrusion 23 is to be squeezed by the moving protruding scraper 28 and transmit the pressure to the protective tube 21, so that the protective tube 21 can move to the right and cooperate with the spring 2 34 to drive the protective tube 21 to return to the left.

[0043] The size of the transmission wheel 1 16 is larger than that of the transmission wheel 2 18 , and the rotation directions of the indirect roller 14 and the transmission wheel 2 18 are both counterclockwise;

[0044] The size of the driving wheel 16 is larger than that of the driving wheel 2 18, which makes the rotation speed of the drum 19 higher than that of the indirect roller 14. The drum 19 can drive the scraper 28 to synchronously scrape the surface of the indirect roller 14 at a rotation speed at least four times.

[0045] Working principle:

[0046] First, the proton exchange membrane 22 is removed from the outer surface of the unwinding roller 4, and passes through the transport roller 15, the indirect roller 14, the rotating roller 11, the rotating roller 2, the rotating drum 19, the heater 8, the transport roller 29 and the winding roller 10 in the transport direction, and the proton exchange membrane 22 taken out first is wound up by the winding roller 10, and the catalyst coating is sprayed downward on the outer surface of the indirect roller 14 by the catalyst spraying mechanism 3, and the motor 15 is started, and the indirect roller 14, the transmission wheel 16, the belt 17, the transmission wheel 28, the fixed shaft 13 and the rotating drum 19 are driven to rotate counterclockwise, so that the outer surface of the indirect roller 14 is gradually covered with the catalyst coating;

[0047] Then, when the portion of the outer surface of the indirect roller 14 coated with the catalyst coating moves to the upper surface of the proton exchange membrane 22 and contacts it, the transport roller 29 and the transport roller 15 are started to drive the proton exchange membrane 22 to move synchronously along the transport direction, so that the portion of the upper surface of the proton exchange membrane 22 that contacts the outer surface of the indirect roller 14 will be coated with the catalyst coating, and the proton exchange membrane 22 moves to the bottom of the drum 19 under the guidance of the rollers 11 and 12, as shown in FIG. Figure 3 As shown, the drum 19 drives the scraper 28 to move in the same direction at a speed higher than that of the indirect roller 14. When the scraper 28 moves upward to the magnetic coverage area of ​​the permanent magnet 27, the scraper 28 moves along the radial line of the drum 19 under the magnetic repulsion of the permanent magnet 27. However, the scraper 28 stops moving when the outer side moves to a position abutting against the outer surface of the indirect roller 14, and the catalyst coating remaining on the outer surface of the indirect roller 14 after coating is scraped off by the drum 19. Subsequently, the coating scraped to one side of the scraper 28 rotates downward with the scraper 28 and gradually Approaching the upper surface of the proton exchange membrane 22, at this time, the scraper 28 gradually leaves the magnetic coverage area of ​​the permanent magnet 27 and loses the magnetic repulsion it receives. At this time, the stretched spring 30 begins to drive the scraper 28 toward the inside of the limit groove 26. At this time, the catalyst coating scraped off the surface of the scraper 28 is scraped off the outer surface of the drum 19, and with the centrifugal trend generated by the high-speed rotation of the scraper 28, the catalyst coating on the scraper 28 is "thrown" obliquely downward to the upper surface of the proton exchange membrane 22, realizing the synchronous recovery and use operation of the catalyst coating;

[0048] Finally, when the scraper 28 continues to move and returns to the magnetic action area of ​​the permanent magnet 27, it continues to move outward and abuts against the inner wall of the protective tube 21. At this time, the outer side of the scraper 28 will abut against the protrusion 23, and the protective tube 21 and the connecting block 32 will be pushed to the right as a whole through the protrusion 23, while the fixed support 31 moves to the left relative to the connecting block 32 and the spring 2 34 is stretched. When the scraper 28 moves over the protrusion 23, the protective tube 21 and the connecting block 32 will be reset as a whole under the action of the spring 2 34. The scraper 28 moves on the inner wall of the protective tube 21, and by abutting against and resetting the multiple groups of protrusions 23, the protective tube 21 produces a reciprocating motion in the horizontal direction. At this time, the proton exchange membrane 22 coated with the catalyst coating moves to the bottom of the protective tube 21, and the catalyst coating layer on the upper surface of the protective tube 21 is repeatedly smoothed to achieve a uniform catalyst coating on the surface of the proton exchange membrane 22 passing through the lower side of the protective tube 21. Subsequently, the proton exchange membrane 22 is heated and dried inside the heater 8, and finally rolled up.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen fuel cell membrane electrode production device, comprising a base (1), a fixing frame (2) and a catalyst spraying mechanism (3), wherein the top of the base (1) is provided with a discharge roller (4), a transport roller 1 (5), a bracket 1 (6), a bracket 2 (7), a heater (8), a transport roller 2 (9) and a winding roller (10) in sequence from left to right along the transport direction of a proton exchange membrane (22), the inner wall of the bracket 1 (6) is provided with a rotating roller 1 (11) and an indirect roller (14) in sequence from bottom to top, the inner wall of the bracket 2 (7) is provided with a rotating roller 2 (12) and a fixing shaft (13) in sequence from bottom to top, and the front of the bracket 1 (6) is provided with a motor (15) for driving the indirect roller (14), characterized in that: A rotating drum (19) is rotatably mounted on the outer surface of the fixed shaft (13), a transmission wheel (18) is mounted on both ends of the rotating drum (19), a transmission wheel (16) is mounted on both ends of the indirect roller (14), a belt (17) is connected between the transmission wheel (16) and the transmission wheel (18), a placement groove (24) is formed on the inner ring surface of the rotating drum (19), two groups of through grooves (25) are symmetrically formed on the inner wall of the placement groove (24), and two groups of limiting grooves (26) connected to the through grooves (25) are formed on the outer surface of the rotating drum (19). The outer surface of the fixed shaft (13) is fixedly mounted with a permanent magnet (27) located in the placement groove (24); the inner wall of the limiting groove (26) is movably clamped with a scraper (28); a placement hole (29) is opened on the inner side of the scraper (28); a spring (30) is movably sleeved on the inner wall of the placement hole (29); the two ends of the spring (30) are elastically connected to the scraper (28) and the limiting groove (26) respectively; the rotating roller (12) is rotatably mounted on the left side of the inner wall of the bracket (7); and the fixed shaft (13) is fixedly mounted on the top of the inner wall of the bracket (7).

2. A hydrogen fuel cell membrane electrode production device according to claim 1, characterized in that: The proton exchange membrane (22) passes from the outer surface of the unwinding roller (4) through the transport roller 1 (5), between the indirect roller (14) and the rotating roller 1 (11), between the indirect roller (14) and the rotating roller 2 (12), the rotating drum (19), the heater (8), the transport roller 2 (9), and finally is rolled up in the winding roller (10). The fixed frame (2) is fixedly installed on the rear side of the top of the base (1), and the catalyst spraying mechanism (3) is installed on the top of the inner wall of the fixed frame (2) and is directly opposite to the top of the indirect roller (14).

3. A hydrogen fuel cell membrane electrode production device according to claim 2, characterized in that: The rotating roller one (11) is located directly below the indirect roller (14), the rotating roller two (12) is located on the right side of the bottom of the rotating roller one (11), the fixed shaft (13) and the rotating drum (19) are located on the right side of the indirect roller (14) and on the upper right side of the rotating roller two (12).

4. A hydrogen fuel cell membrane electrode production device according to claim 3, characterized in that: A connecting frame (20) is fixedly installed on the left side of the heater (8), and a plurality of groups of pillars (31) are fixedly connected to the left side of the connecting frame (20). A connecting block (32) is slidably installed on the outer surface of the pillar (31), and a slot (33) for the pillar (31) to slide is provided inside the connecting block (32). A second spring (34) located in the slot (33) is movably sleeved on the outer surface of the pillar (31), and the two ends of the second spring (34) are elastically connected to the slot (33) and the pillar (31) respectively. A protective tube (21) is fixedly connected to the bottom of the connecting block (32), and the protective tube (21) covers the outer surface of the rotating drum (19). The inner wall of the protective tube (21) is fixedly connected to a plurality of groups of protrusions (23) distributed equidistantly around the circumference.

5. A hydrogen fuel cell membrane electrode production device according to claim 4, characterized in that: The right bottom of the protective tube (21) is a straight structure with an inclined buffer portion on the left side, the left side of the protective tube (21) is a semicircular ring structure concentrically distributed with the rotating drum (19), and the outer side of the scraper (28) abuts against the inner wall of the protective tube (21).

6. A hydrogen fuel cell membrane electrode production device according to claim 5, characterized in that: The permanent magnet (27) is a circular arc structure with a physical opening and closing angle of 135°. When the scraper (28) rotates around the axis of the fixed shaft (13) to the incomplete part of the permanent magnet (27), it is not affected by the magnetic attraction of the permanent magnet (27) and can be completely pulled into the limiting groove (26) by the spring 1 (30).

7. A hydrogen fuel cell membrane electrode production device according to claim 6, characterized in that: The protrusion (23) is located on the inner wall of the arc portion of the protective tube (21), and the cross-sectional shape of the protrusion (23) is semicircular.

8. A hydrogen fuel cell membrane electrode production device according to claim 7, characterized in that: The size of the transmission wheel 1 (16) is larger than the size of the transmission wheel 2 (18), and the rotation directions of the indirect roller (14) and the transmission wheel 2 (18) are both counterclockwise.

Images