Graphite substrate polishing apparatus for fuel cell bipolar plates

Abstract

The application relates to a graphite base material grinding processing equipment for fuel cell bipolar plates, which comprises a graphite crusher, a polishing box arranged below the graphite crusher, a material guiding assembly arranged at the top of the polishing box, a first polishing assembly arranged in the polishing box, the first polishing assembly comprising a first polishing block, a first rotating assembly arranged on the first polishing assembly, a second polishing assembly arranged in the polishing box, the second polishing assembly comprising a second polishing block, a second rotating assembly arranged on the second polishing assembly, a driving assembly arranged at the bottom of the polishing box, and a conveying assembly arranged in the polishing box, wherein the first polishing block and the second polishing block are used for polishing graphite blocks into spherical graphite in the rotating process, and the conveying assembly is used for conveying the graphite blocks at the bottom of the polishing box from bottom to top, so that the polishing efficiency is improved, the graphite blocks at the bottom of the polishing box can also be polished, and the polishing quality is improved.

Description

Technical Field

[0001] This invention relates to the field of graphite processing technology, and more specifically to a grinding and processing equipment for graphite substrates used in fuel cell bipolar plates. Background Technology

[0002] Spherical graphite, as a graphite substrate, has good electrical conductivity and chemical stability, and is an important component of fuel cell bipolar plates. In the processing of spherical graphite, large graphite blocks need to be broken into smaller graphite blocks, and then the graphite blocks are ground into spherical graphite through processes such as grinding. After that, they are purified at high temperature in the purification workshop to become high-purity spherical graphite. At present, the efficiency and grinding quality of grinding graphite blocks into spherical graphite are low.

[0003] Chinese patent CN114160236B discloses an integrated spherical graphite processing device, including a base. A crushing box and a purification box are fixedly connected to the upper end of the base from left to right. A high-temperature purification device is provided on the right side of the purification box. Two crushing blocks are symmetrically arranged on the front and rear inner walls of the crushing box. Multiple crushing teeth are fixedly connected to the opposite side of the two crushing blocks. The crushing teeth arranged on the left and right sides are staggered and the distance between them gradually decreases from top to bottom. Movable openings are provided on the left and right side walls of the crushing box at the corresponding positions of the crushing blocks. A movable rod is inserted through each movable opening. One end of the movable rod inside the crushing box is movably inserted into the corresponding crushing block.

[0004] The existing technical solutions mentioned above have the following drawbacks: they have low grinding efficiency in the process of grinding graphite blocks into spherical graphite, and the graphite blocks at the bottom of the grinding box cannot be ground, resulting in incomplete processing and waste of graphite blocks. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a grinding and processing device for graphite substrates used in fuel cell bipolar plates. By setting a first grinding block and a second grinding block to rotate in opposite directions, the graphite block is ground into spherical graphite, resulting in better grinding effect and improved grinding quality. By setting multiple sets of first grinding components and second grinding components, the grinding efficiency is further improved. By setting a conveying component, the graphite block at the bottom of the grinding box is conveyed from bottom to top into the first grinding components and second grinding components for grinding, making the grinding more complete and avoiding waste of graphite blocks.

[0006] The technical solution of the present invention is as follows:

[0007] A grinding and processing device for graphite substrates used in fuel cell bipolar plates includes a graphite crusher, a grinding box below the graphite crusher, a material guiding assembly at the top of the grinding box, a first grinding assembly inside the grinding box, the first grinding assembly including a first grinding block, a first rotating assembly on the first grinding assembly, a second grinding assembly inside the grinding box, the first grinding assembly including a second grinding block, a second rotating assembly on the second grinding assembly, a drive assembly at the bottom of the grinding box, and a conveying assembly inside the grinding box. The drive assembly drives the first grinding assembly and the second grinding assembly to rotate in opposite directions. The first rotating assembly drives the first grinding block to rotate on its own axis when the first grinding block revolves around the center of ...

[0008] As a preferred embodiment, the material guiding assembly includes a feeding plate fixedly disposed inside the grinding box, a plurality of feeding holes opened along the circumferential direction of the feeding plate, and a guiding plate fixedly disposed in the middle of the feeding plate, wherein the feeding holes are located on the outer side of the guiding plate, and the guiding plate is configured as a conical structure.

[0009] As a preferred embodiment, the first grinding assembly includes a motor fixedly mounted on the top of the feed plate, a first rotating shaft driven by the motor, a plurality of first connecting rods fixedly mounted on the first rotating shaft, and first grinding rods rotatably mounted on the left and right sides of the first connecting rods. The first grinding block is fixedly mounted on the first grinding rod. A first synchronous pulley is fixedly mounted on the first grinding rod located outside the first connecting rod, and a second synchronous pulley is fixedly mounted on the first grinding rod located inside the first connecting rod. A first synchronous belt connects the first synchronous pulley and the second synchronous pulley.

[0010] As a preferred embodiment, the first rotating assembly includes a first gear fixedly disposed at the bottom of the feed plate, a rotating shaft rotatably disposed at the top of the first connecting rod, a second gear fixedly disposed on the rotating shaft, a third synchronous wheel fixedly disposed on the rotating shaft, a fourth synchronous wheel fixedly disposed on the first grinding rod, and a second synchronous belt connecting the third synchronous wheel and the fourth synchronous wheel, wherein the first gear and the second gear mesh with each other.

[0011] As a preferred embodiment, the second polishing assembly includes a second rotating shaft rotatably mounted on the first rotating shaft, a plurality of second connecting rods fixedly mounted on the second rotating shaft, and second polishing rods rotatably mounted on the left and right sides of the second connecting rods. The second polishing block is fixedly mounted on the second polishing rods. A synchronous wheel a is fixedly mounted on the second polishing rod located on the outer side of the second connecting rod, and a synchronous wheel b is fixedly mounted on the second polishing rod located on the inner side of the second connecting rod. A third synchronous belt connects the synchronous wheel a and the synchronous wheel b.

[0012] As a preferred embodiment, the second rotating assembly includes a third gear fixedly disposed at the bottom of the grinding box and a fourth gear fixedly disposed on the second grinding rod, wherein the third gear and the fourth gear mesh with each other.

[0013] As a preferred embodiment, the drive assembly includes a support base fixedly disposed at the bottom of the grinding box, a rotating rod fixedly disposed on the support base, a first bevel gear rotatably disposed on the rotating rod, a second bevel gear fixedly disposed at the bottom of the first rotating shaft, and a third bevel gear fixedly disposed at the bottom of the second rotating shaft, wherein the first bevel gear, the second bevel gear, and the third bevel gear mesh with each other.

[0014] As a preferred embodiment, the conveying assembly includes a fixed rod fixedly mounted on the first connecting rod, a rotating sleeve fixedly mounted on the fixed rod, and a spiral blade fixedly mounted on the rotating sleeve, wherein the outer side of the spiral blade is in contact with the inner wall of the grinding box.

[0015] As a preferred embodiment, the first grinding rod and the second grinding rod are arranged alternately.

[0016] As another preferred embodiment, the grinding box is provided with discharge pipes on both sides of the bottom, and the discharge pipes are equipped with solenoid valves.

[0017] This invention comprises a first grinding component, a second grinding component, and a drive component. A motor drives a first rotating shaft to rotate, causing a first connecting rod, a first grinding rod, and a first grinding block to revolve. This rotation of a second bevel gear drives the rotation of a first bevel gear, which in turn drives the rotation of a third bevel gear. Consequently, the rotation direction of the second rotating shaft is opposite to that of the first rotating shaft. The rotation of the second rotating shaft also causes the second connecting rod, the second grinding rod, and the second grinding block to revolve, grinding the graphite blocks in the grinding box into spherical graphite, thus improving grinding efficiency. Furthermore, the staggered arrangement of the first and second grinding blocks enhances the grinding effect.

[0018] The present invention includes a first rotating component and a second rotating component. By setting a first gear and a second gear to mesh, the rotation of the second gear drives the rotating shaft to rotate, so that the first grinding rod and the first grinding block rotate on their own axis while following the revolution of the first connecting rod. By setting a third gear and a fourth gear to mesh, the rotation of the fourth gear drives the second grinding rod and the second grinding block to rotate on their own axis while following the revolution of the second connecting rod, thereby further improving the grinding efficiency and the grinding quality.

[0019] The present invention also includes a conveying assembly, which, by setting a rotating sleeve and a spiral blade, conveys the graphite blocks at the bottom of the grinding box from bottom to top as they rotate with the first connecting rod. The graphite blocks located at the top of the spiral blade re-enter between the first grinding assembly and the second grinding assembly for grinding, making the grinding more thorough and complete, and avoiding waste of graphite blocks.

[0020] In summary, this invention has the advantages of high grinding efficiency and high grinding quality, and is suitable for the field of graphite processing technology. Attached Figure Description

[0021] The invention will be further described below with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the grinding and processing equipment for graphite substrates used in the bipolar plates of this fuel cell.

[0023] Figure 2 This is a schematic diagram of the internal structure of the grinding box;

[0024] Figure 3 This is an internal sectional view of the grinding box;

[0025] Figure 4 for Figure 3 Enlarged view of point A;

[0026] Figure 5 for Figure 3 Enlarged view of point B;

[0027] Figure 6 This is a schematic diagram showing the state of a graphite block when it enters the grinding box for grinding.

[0028] Figure 7 This is a schematic diagram showing the state of the first and second grinding blocks as they rotate.

[0029] Reference numerals: 1-Graphite crusher; 11-Grinding box; 12-Discharge pipe; 13-Solenoid valve; 2-Guide assembly; 21-Discharge plate; 22-Discharge hole; 23-Guide plate; 3-First grinding assembly; 31-First grinding block; 32-Motor; 33-First rotating shaft; 34-First connecting rod; 35-First grinding rod; 36-First synchronous pulley; 37-Second synchronous pulley; 38-First synchronous belt; 4-First rotating assembly; 41-First gear; 42-Rotating shaft; 43-Second gear; 44-Third synchronous pulley; 45-... 46-Second synchronous pulley; 5-Second synchronous belt; 5-Second grinding assembly; 51-Second grinding block; 52-Second rotating shaft; 53-Second connecting rod; 54-Second grinding rod; 55-Synchronous pulley a; 56-Synchronous pulley b; 57-Third synchronous belt; 6-Second rotating assembly; 61-Third gear; 62-Fourth gear; 7-Drive assembly; 71-Support seat; 72-Rotating rod; 73-First bevel gear; 74-Second bevel gear; 75-Third bevel gear; 8-Conveying assembly; 81-Rotating sleeve; 82-Helical blade; 83-Fixed rod; Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Example

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figures 1 to 7As shown, a graphite substrate grinding and processing device for fuel cell bipolar plates includes a graphite crusher 1, a grinding box 11 below the graphite crusher 1, a material guide assembly 2 at the top of the grinding box 11, a first grinding assembly 3 inside the grinding box 11, the first grinding assembly 3 including a first grinding block 31, a first rotating assembly 4 on the first grinding assembly 3, a second grinding assembly 5 inside the grinding box 11, the second grinding assembly 5 including a second grinding block 51, a second rotating assembly 6 on the second grinding assembly 5, a drive assembly 7 at the bottom of the grinding box 11, and a conveying assembly 8 inside the grinding box 11. The drive assembly 7 is used to drive the first grinding assembly 3 and the first grinding assembly 4. The second grinding component 5 rotates in the opposite direction. The first rotating component 4 is used to drive the first grinding block 31 to rotate when the first grinding block 31 revolves around it. The second rotating component 6 is used to drive the second grinding block 51 to rotate when the second grinding block 51 revolves around it. The first grinding block 31 and the second grinding block 51 are used to grind the graphite block into spherical graphite during the rotation process. The conveying component 8 is used to convey the graphite block at the bottom of the grinding box 11 from bottom to top. The graphite crusher 1 is an existing mature technology and will not be described in detail here. The bottom of the grinding box 11 is set with a structure that is high in the middle and low around the edges so that the graphite block can slide onto the spiral blade 82 for easy conveying by the spiral blade 82.

[0033] like Figure 2 As shown, the material guiding assembly 2 includes a feeding plate 21 fixedly installed in the grinding box 11, a plurality of feeding holes 22 opened along the circumference of the feeding plate 21, and a guide plate 23 fixedly installed in the middle of the feeding plate 21. The feeding holes 22 are located on the outside of the guide plate 23. The guide plate 23 is set as a conical structure. In use, the graphite crusher 1 crushes large pieces of graphite into small pieces of graphite. The crushed graphite blocks enter the grinding box 11 through the feeding holes 22 under the guidance of the guide plate 23, so that the graphite blocks enter the first grinding assembly 3 and the second grinding assembly 5 for grinding under the action of the guide plate 23.

[0034] like Figure 3As shown, the first grinding assembly 3 includes a motor 32 fixedly mounted on the top of the feed plate 21, a first rotating shaft 33 driven by the motor 32, several first connecting rods 34 fixedly mounted on the first rotating shaft 33, and first grinding rods 35 rotatably mounted on the left and right sides of the first connecting rods 34. A first grinding block 31 is fixedly mounted on the first grinding rod 35. A first synchronous pulley 36 is fixedly mounted on the first grinding rod 35 located outside the first connecting rod 34, and a second synchronous pulley 37 is fixedly mounted on the first grinding rod 35 located inside the first connecting rod 34. A first synchronous belt 38 connects the first synchronous pulley 36 and the second synchronous pulley 37. In use, when the graphite block enters the grinding box... After step 11, the motor 32 drives the first rotating shaft 33 to rotate forward, causing the first connecting rod 34, the first grinding rod 35, and the first grinding block 31 to rotate forward with the first rotating shaft 33, that is, the first grinding block 31 revolves around the center. At the same time, under the meshing of the first gear 41 and the second gear 43, the rotating shaft 42 rotates. Under the action of the first synchronous pulley 36, the second synchronous pulley 37, the first synchronous belt 38, the third synchronous pulley 44, the fourth synchronous pulley 45, and the second synchronous belt 46, the first grinding rod 35 and the first grinding block 31 are driven to rotate, so that the first grinding block 31 revolves around the center and rotates on its own axis. At the same time, it cooperates with the second grinding assembly 5 to grind the graphite block into spherical graphite.

[0035] like Figure 4 As shown, the first rotating assembly 4 includes a first gear 41 fixedly mounted on the bottom of the feed plate 21, a rotating shaft 42 rotatably mounted on the top of the first connecting rod 34, a second gear 43 fixedly mounted on the rotating shaft 42, a third synchronous wheel 44 fixedly mounted on the rotating shaft 42, a fourth synchronous wheel 45 fixedly mounted on the first grinding rod 35, and a second synchronous belt 46 connecting the third synchronous wheel 44 and the fourth synchronous wheel 45. The first gear 41 and the second gear 43 mesh with each other.

[0036] like Figure 3 and Figure 5As shown, the second polishing assembly 5 includes a second rotating shaft 52 rotatably mounted on the first rotating shaft 33, several second connecting rods 53 fixedly mounted on the second rotating shaft 52, and second polishing rods 54 rotatably mounted on the left and right sides of the second connecting rods 53. A second polishing block 51 is fixedly mounted on the second polishing rod 54. A synchronous pulley a55 is fixedly mounted on the second polishing rod 54 located outside the second connecting rod 53, and a synchronous pulley b56 is fixedly mounted on the second polishing rod 54 located inside the second connecting rod 53. A third synchronous belt 57 connects the synchronous pulleys a55 and b56. In use, when the first rotating shaft 33 rotates clockwise, it drives the second polishing blocks 51. The bevel gear 74 moves forward. Under the meshing of the first bevel gear 73, the second bevel gear 74, and the third bevel gear 75, the third bevel gear 75 rotates in reverse, causing the second rotating shaft 52 to rotate in reverse. This drives the second connecting rod 53, the second grinding rod 54, and the second grinding block 51 to rotate, i.e., the second grinding block 51 revolves. At the same time, under the meshing of the third gear 61 and the fourth gear 62, and under the action of the synchronous pulley a55, the synchronous pulley b56, and the third synchronous belt 57, the second grinding rod 54 and the second grinding block 51 rotate on their own axis, grinding the graphite block into spherical graphite, thus improving the efficiency and quality of grinding.

[0037] like Figure 5 As shown, the second rotating assembly 6 includes a third gear 61 fixedly mounted on the bottom of the grinding box 11 and a fourth gear 62 fixedly mounted on the second grinding rod 54, with the third gear 61 and the fourth gear 62 meshing with each other.

[0038] like Figure 5 As shown, the drive assembly 7 includes a support base 71 fixedly mounted on the bottom of the grinding box 11, a rotating rod 72 fixedly mounted on the support base 71, a first bevel gear 73 rotatably mounted on the rotating rod 72, a second bevel gear 74 fixedly mounted on the bottom of the first rotating shaft 33, and a third bevel gear 75 fixedly mounted on the bottom of the second rotating shaft 52. The first bevel gear 73, the second bevel gear 74, and the third bevel gear 75 mesh with each other.

[0039] like Figure 2 As shown, the conveying assembly 8 includes a fixed rod 83 fixedly mounted on the first connecting rod 34, a rotating sleeve 81 fixedly mounted on the fixed rod 83, and a spiral blade 82 fixedly mounted on the rotating sleeve 81. The outer side of the spiral blade 82 is in contact with the inner wall of the grinding box 11. In use, the rotating sleeve 81 and the spiral blade 82 rotate with the first connecting rod 34. During the rotation, the graphite block at the bottom of the grinding box 11 is conveyed from bottom to top. The graphite block at the top of the spiral blade 82 re-enters between the first grinding assembly 3 and the second grinding assembly 5 for grinding, making the grinding more thorough and complete, and avoiding the waste of graphite blocks.

[0040] like Figure 6 As shown, the first grinding rod 35 and the second grinding rod 54 are staggered. The staggered grinding by the first grinding rod 35 and the second grinding rod 54 results in a better grinding effect and improves the efficiency and quality of grinding.

[0041] like Figure 1 As shown, discharge pipes 12 are provided on both sides of the bottom of the grinding box 11. Solenoid valves 13 are provided on the discharge pipes 12. Solenoid valves 13 are existing mature technologies and will not be described in detail here. When the spherical graphite is processed, the solenoid valves 13 are opened, so that the discharge pipes 12 are open, allowing the spherical graphite to be discharged from the discharge pipes 12. Example

[0042] like Figure 3 As shown, the components that are the same as or corresponding to those in Embodiment 1 are marked with the same reference numerals as those in Embodiment 1. For the sake of simplicity, only the differences from Embodiment 1 will be described below. The difference between Embodiment 2 and Embodiment 1 is that: both the first grinding block 31 and the second grinding block 51 are provided with grinding patterns, which increases the friction between the first grinding block 31 and the second grinding block 51 and the graphite block, and further improves the quality and efficiency of grinding.

[0043] First, the graphite blocks to be crushed are placed into the graphite crusher 1. The graphite crusher 1 crushes the large graphite blocks into smaller ones. Guided by the guide plate 23, the crushed graphite blocks enter the grinding box 11 through the discharge hole 22. After the graphite blocks enter the grinding box 11, the motor 32 drives the first rotating shaft 33 to rotate clockwise, causing the first connecting rod 34, the first grinding rod 35, and the first grinding block 31 to rotate clockwise along with the first rotating shaft 33. That is, the first grinding block 31 revolves around the sun. At the same time, under the meshing of the first gear 41 and the second gear 43, the rotating shaft 42 rotates. Under the action of the first synchronous pulley 36, the second synchronous pulley 37, the first synchronous belt 38, the third synchronous pulley 44, the fourth synchronous pulley 45, and the second synchronous belt 46, the first grinding rod 35 and the first grinding block 31 are driven to rotate, realizing that the first grinding block 31 revolves around the sun and rotates on its own axis. At the same time, when the first rotating shaft 33 rotates forward, it drives the second bevel gear 74 to rotate forward. Under the meshing of the second bevel gear 74 and the third bevel gear 75, the third bevel gear 75 reverses, thereby causing the second rotating shaft 52 to reverse, which in turn drives the second connecting rod 53, the second grinding rod 54, and the second grinding block 51 to rotate, that is, the second grinding block 51 revolves. At the same time, under the meshing of the third gear 61 and the fourth gear 62, and under the action of the synchronous pulley a55, the synchronous pulley b56, and the third synchronous belt 57, the second grinding rod 54 and the second grinding block 51 are driven to rotate. In this way, the graphite block is ground into spherical graphite, improving the grinding efficiency and quality. In addition, when the first rotating shaft 33 rotates, it drives the rotating sleeve 81 and the spiral blade 82 to rotate. During the rotation, the graphite block at the bottom of the grinding box 11 is transported from bottom to top, and the graphite block at the top of the spiral blade 82 re-enters between the first grinding assembly 3 and the second grinding assembly 5 for grinding, making the grinding more thorough and complete, and avoiding the waste of graphite blocks.

[0044] In the description of this invention, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0045] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0046] The above description, in conjunction with the accompanying drawings, represents only preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention. These modifications and improvements should also be considered within the scope of protection of the present invention and will not affect the effectiveness and practicality of the present invention.

Claims

1. A graphite base material grinding apparatus for a fuel cell bipolar plate comprising a graphite crusher (1), characterized by: The graphite crusher (1) is provided below with a polishing box (11), the top of the polishing box (11) is provided with a material guiding assembly (2), the polishing box (11) is provided with a first polishing assembly (3) inside, the first polishing assembly (3) comprises a first polishing block (31), the first polishing assembly (3) is provided with a first rotating assembly (4), the polishing box (11) is provided with a second polishing assembly (5) inside, the second polishing assembly (5) comprises a second polishing block (51), the second polishing assembly (5) is provided with a second rotating assembly (6), the bottom of the polishing box (11) is provided with a driving assembly (7), the polishing box (11) is further provided with a conveying assembly (8) inside, the driving assembly (7) is used for driving the first polishing assembly (3) and the second polishing assembly (5) to rotate in opposite directions, the first rotating assembly (4) is used for driving the first polishing block (31) to rotate when the first polishing block (31) revolves, the second rotating assembly (6) is used for driving the second polishing block (51) to rotate when the second polishing block (51) revolves, the first polishing block (31) and the second polishing block (51) are used for polishing graphite blocks into spherical graphite in the process of rotating, and the conveying assembly (8) is used for conveying the graphite blocks at the bottom of the polishing box (11) from bottom to top; The material guiding assembly (2) comprises a discharging plate (21) fixedly arranged in the polishing box (11), a plurality of discharging holes (22) formed in the circumferential direction of the discharging plate (21), and a material guiding plate (23) fixedly arranged at the middle of the discharging plate (21), the discharging holes (22) are located outside the material guiding plate (23), and the material guiding plate (23) is arranged in a conical structure; The first polishing assembly (3) comprises a motor (32) fixedly arranged at the top of the discharging plate (21), a first rotating shaft (33) driven by the motor (32), a plurality of first connecting rods (34) fixedly arranged on the first rotating shaft (33), and first polishing rods (35) rotatably arranged on the left and right sides of the first connecting rods (34), the first polishing block (31) is fixedly arranged on the first polishing rods (35), a first synchronous wheel (36) is fixedly arranged on the first polishing rod (35) outside the first connecting rod (34), a second synchronous wheel (37) is fixedly arranged on the first polishing rod (35) inside the first connecting rod (34), and a first synchronous belt (38) is connected between the first synchronous wheel (36) and the second synchronous wheel (37). The second polishing assembly (5) comprises a second rotating shaft (52) rotatably arranged on the first rotating shaft (33), a plurality of second connecting rods (53) fixedly arranged on the second rotating shaft (52), and a second polishing rod (54) rotatably arranged on the left and right sides of the second connecting rod (53), the second polishing block (51) is fixedly arranged on the second polishing rod (54), a synchronous wheel a (55) is fixedly arranged on the second polishing rod (54) on the outer side of the second connecting rod (53), a synchronous wheel b (56) is fixedly arranged on the second polishing rod (54) on the inner side of the second connecting rod (53), and the synchronous wheel a (55) and the synchronous wheel b (56) are connected by a third synchronous belt (57). The conveying assembly (8) comprises a fixed rod (83) fixedly arranged on the first connecting rod (34), a rotating sleeve (81) fixedly arranged on the fixed rod (83), and a spiral blade (82) fixedly arranged on the rotating sleeve (81), and the outer side of the spiral blade (82) is attached to the inner wall of the polishing box (11).

2. The apparatus for polishing a graphite substrate for a fuel cell bipolar plate according to claim 1, wherein: The first rotating assembly (4) comprises a first gear (41) fixedly arranged on the bottom of the discharging plate (21), a rotating shaft (42) rotatably arranged on the top of the first connecting rod (34), a second gear (43) fixedly arranged on the rotating shaft (42), a third synchronous wheel (44) fixedly arranged on the rotating shaft (42), a fourth synchronous wheel (45) fixedly arranged on the first polishing rod (35), and a second synchronous belt (46) connected between the third synchronous wheel (44) and the fourth synchronous wheel (45), and the first gear (41) and the second gear (43) are engaged.

3. The apparatus for polishing a graphite substrate for a fuel cell bipolar plate according to claim 1, wherein: The second rotating assembly (6) comprises a third gear (61) fixedly arranged on the bottom of the polishing box (11) and a fourth gear (62) fixedly arranged on the second polishing rod (54), and the third gear (61) and the fourth gear (62) are engaged.

4. The apparatus for polishing a graphite substrate for a fuel cell bipolar plate according to claim 1, wherein: The driving assembly (7) comprises a support seat (71) fixedly arranged on the bottom of the polishing box (11), a rotating rod (72) fixedly arranged on the support seat (71), a first bevel gear (73) rotatably arranged on the rotating rod (72), a second bevel gear (74) fixedly arranged on the bottom of the first rotating shaft (33), and a third bevel gear (75) fixedly arranged on the bottom of the second rotating shaft (52), and the first bevel gear (73), the second bevel gear (74), and the third bevel gear (75) are engaged.

5. The apparatus for polishing a graphite substrate for a fuel cell bipolar plate according to claim 1, wherein: The first polishing rod (35) and the second polishing rod (54) are arranged alternately.

6. The apparatus for polishing a graphite substrate for a fuel cell bipolar plate according to claim 1, wherein: The bottom of the polishing box (11) is provided with a discharge pipe (12) on both sides, and the discharge pipe (12) is provided with an electromagnetic valve (13).

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