Graphene paste filter pressing device

Abstract

The utility model relates to a graphene paste filter pressing device, which relates to the field of graphene production and processing, and comprises a cylinder body, a cover body and a plurality of filter plates, the filter plate comprises a supporting part, a partition plate part, a water filtering part and a diaphragm part; the water filtering part covers an opening in the upper portion of the supporting part, a plurality of filtering holes are evenly distributed in the water filtering part, and the water filtering part is lower than the top of the supporting part; the diaphragm part covers an opening in the bottom end of the supporting part, the partition plate part is arranged between the water filtering part and the diaphragm part, and a drainage cavity is formed between the partition plate part and the water filtering part and communicated with the outside; a pressure cavity is formed between the partition plate part and the diaphragm part and is communicated with an external air source; and the cover body is arranged at the top of the cylinder body and is used for abutting against the filter plate at the top. According to the graphene paste filter pressing device, air pressure is used for driving the diaphragm to carry out filter pressing on graphene paste, the diaphragm can change along with the gradually hardened shape of the paste, flexible pressure application is achieved, hard contact caused by local pressure concentration can be reduced, and the influence on the performance of the graphene paste is reduced.

Description

Technical Field

[0001] This utility model relates to the field of graphene production and processing, and in particular to a graphene paste pressure filtration device. Background Technology

[0002] Graphene paste is a paste-like material with graphene as the main component. It is usually formed by dispersing graphene sheets in a specific solvent or matrix. Graphene paste pressure filtration device can separate the solid components from the liquid components in the graphene dispersion through pressure filtration process, thereby obtaining high-purity graphene paste.

[0003] Currently, a Chinese patent with announcement number CN 219764603 U and announcement date of September 29, 2023, proposes a graphite pressure filter device, including a machine base. The machine base is provided with a through groove, which is divided into a first station and a second station along its length. Support parts are provided on both sides of the through groove along its length, and a filter plate is mounted on the two support parts. The machine base is provided with a vertically penetrating cylinder at the first station. The lower part of the cylinder is provided with an opening for a graphite cake to pass through on the side near the second station. A cover that can be hinged to the opening is a hinged cover that can be flipped outward. A pressure block is provided above the cylinder, and the pressure block is raised and lowered under the drive of a second drive module.

[0004] In use, the filter plate is placed in the cylinder, then the filtrate is poured into the cylinder, and finally the pressure block at the top of the cylinder is moved downwards to press the filtrate and squeeze out the liquid. The liquid is then discharged through the filter holes on the filter plate at the bottom of the cylinder, thus achieving pressure filtration.

[0005] Regarding the aforementioned technologies, when graphene is directly extruded using a hard contact extrusion method, the graphene sheets may break or stack due to mechanical stress, leading to a decrease in the performance of the graphene. Utility Model Content

[0006] In order to reduce the performance degradation of graphene due to hard compression during the pressure filtration process, this invention provides a graphene paste pressure filtration device.

[0007] This utility model provides a graphene paste pressure filtration device, which adopts the following technical solution:

[0008] A graphene paste pressure filtration device includes: a cylindrical body, a cover, and multiple filter plates; the bottom of the cylindrical body is provided with a drainage hole; each filter plate includes a support portion, a partition portion, a water filtration portion, and a membrane portion; the support portion is cylindrical, and both the top and bottom ends of the support portion are provided with sealing structures; the water filtration portion covers the opening above the support portion, and multiple filter holes are evenly distributed on the water filtration portion, the height of the water filtration portion being lower than the top of the support portion; the membrane portion covers the opening at the bottom end of the support portion; the partition portion is disposed between the water filtration portion and the membrane portion, forming a drainage cavity between the partition portion and the water filtration portion, the drainage cavity communicating with the outside; a pressure cavity is formed between the partition portion and the membrane portion, the pressure cavity communicating with an external air source; multiple filter plates are stacked inside the cylindrical body, and the multiple filter plates are sealed together; the cover is disposed on the top of the cylindrical body, and the cover is used to abut against the top filter plate.

[0009] By adopting the above technical solution, during use, firstly, a filter plate is placed in the cylinder, and then filtrate is poured onto the filter plate. When the filtrate is level with the top of the support, filter plates are stacked one by one on top of the filter plate, and filtrate is poured onto each one in turn, until the last filter plate is stacked. After that, no more filtrate is poured onto the last filter plate. Next, the cover is installed on top of the cylinder, pressing the cover tightly onto the topmost filter plate and pressing all the filter plates together to seal them. Finally, high-pressure air is passed into the pressure chamber of the filter plate through an external air source. Under the pressure of the high-pressure air, the diaphragm bulges downward, allowing the diaphragm to squeeze the filtrate on the filter plate below. The squeezed liquid is collected in the drain chamber through the filter holes on the water filtration section, thus achieving pressure filtration of the filtrate. After pressure filtration is completed, the cover is removed, and the filter plates are taken out one by one to remove the blocky material after pressure filtration.

[0010] Thus, the method of using air pressure to drive the diaphragm to squeeze and filter graphene paste is a flexible filtration method. When the diaphragm comes into contact with the graphene paste, it adheres to the surface of the paste and squeezes it. When the paste hardens due to low local water content, the diaphragm changes shape with the hardening of the paste, achieving flexible pressure application. This reduces the hard contact caused by local pressure concentration and minimizes the impact on the performance of the graphene paste. At the same time, the internal pressure of the gas driving the diaphragm to bulge is equal, allowing the diaphragm to apply pressure to the graphene paste more evenly when squeezing it. As a result, after the paste is filtered, the water content inside the graphene paste is more uniform.

[0011] Optionally, the filter plate is further provided with a connecting pipe, the top of the connecting pipe being connected to the top of the water filtration section, and the bottom of the connecting pipe being connected to the bottom of the diaphragm section. Both the water filtration section and the diaphragm section are sealed to the connecting pipe.

[0012] By adopting the above technical solution, after the filter plates are stacked inside the cylinder, the connecting pipes in the middle of the filter plates correspond to each other, connecting the spaces between the multiple filter plates. At this point, the filtrate can be poured directly into the connecting pipe in the middle of the top filter plate. The filtrate will flow along the connecting pipe to the bottom of the cylinder and fill the spaces between the filter plates from bottom to top. In this way, by setting up connecting pipes to connect the spaces between multiple filter plates used to hold the filtrate, there is no need to pour the filtrate layer by layer; it can be poured directly from the connecting pipe at the top, making it more convenient to use.

[0013] Optionally, the cover is provided with a water inlet pipe and a valve body, the valve body is fixedly installed on the water inlet pipe, and the valve body is used to control the opening and closing of the water inlet pipe.

[0014] By adopting the above technical solution, during use, the filter plates are first stacked inside the cylinder, then the cover is installed on the cylinder, pressing the multiple stacked filter plates together. Filtrate is then poured into the inlet pipe of the cover, and after the inlet pipe is full, the valve is used to seal it before pressing. In this way, by opening an inlet pipe on the cover and filling the gaps between the filter plates with filtrate through the inlet pipe after the cover has pressed the filter plates together, the probability of filtrate flowing out through the gaps between the filter plates can be effectively reduced, thus improving the filtrate utilization rate.

[0015] Optionally, the bottom of the water inlet pipe is provided with a first plug-in portion, and the top of the connecting pipe is provided with a second plug-in portion. The first plug-in portion and the second plug-in portion are provided correspondingly.

[0016] Since the diaphragm section is located below the filter plates, and the top of the filter plate is covered, there is no diaphragm to press the top filter plate for filtration. Therefore, it is necessary to reduce the amount of filtrate spilling onto the top filter plate. By adopting the above technical solution, the first connector of the inlet pipe is inserted into the first connector of the connecting pipe, and the first connector and the second connector are sealed together. When filling the gap between the filter plates with filtrate, the filtrate flows directly from the first connector and the second connector to the area below the top filter plate, which can effectively reduce the amount of filtrate spilling onto the top filter plate and further improve the utilization rate of the filtrate.

[0017] Optionally, the support portion is further provided with a drain pipe, one end of which is connected to the drain cavity, and the other end is provided with a third insertion portion; the top of the support portion is provided with a first insertion hole, which is connected to the drain cavity, and the third insertion portion is configured to cooperate with the first insertion hole, and the first insertion hole is provided with a sealing structure inside.

[0018] By adopting the above technical solution, when the filtrate is pressure filtered, the filtered liquid will gather in the drain chamber and be discharged through the drain pipe connected to the drain chamber. The drain pipe can connect the drain chambers on multiple filter plates through the cooperation of the third insertion part and the first insertion hole, and guide the liquid to the bottom of the cylinder, reducing the accumulation of the filtered liquid in the drain chamber and effectively improving the drainage efficiency.

[0019] Optionally, a guide surface is provided at the bottom of the drainage cavity, and one end of the drainage pipe that connects to the inside of the drainage cavity is located at the lowest position of the guide surface.

[0020] By adopting the above technical solution, the flow guide surface can effectively guide the liquid flow in the drainage chamber to the drainage pipe, further accelerating the efficiency of the filtered liquid being discharged from the drainage chamber.

[0021] Optionally, the support portion is further provided with an air guide tube, one end of which is connected to the inside of the pressure chamber, and the other end is provided with a fourth insertion portion; the bottom of the support portion is provided with a second insertion hole, which is connected to the pressure chamber, and the fourth insertion portion is configured to cooperate with the second insertion hole, and the inside of the second insertion hole is provided with a sealing structure.

[0022] By adopting the above technical solution, during installation, the fourth connector on adjacent filter plates is inserted into the corresponding second connector hole, connecting the pressure chambers of all filter plates. When supplying air to the pressure chambers of the filter plates, it is only necessary to connect the air pipe to the air guide pipe on the top filter plate and seal the second connector hole on the bottom filter plate. Thus, there is no need to install an independent air supply pipe for each filter plate, simplifying the air supply operation during pressure filtration.

[0023] Optionally, a hydraulic assembly is also included, comprising a support frame and a hydraulic cylinder. The support frame is fixedly mounted on the cylinder, one end of the hydraulic cylinder is fixedly mounted on the support frame, and the cover is mounted on the other end of the hydraulic cylinder. The hydraulic cylinder is used to drive the cover to move along the depth direction of the cylinder.

[0024] By adopting the above technical solution, after all the filter plates are stacked in the cylinder, the hydraulic cylinder presses the cover on top of the filter plates, which can effectively seal the cavity between the filter plates used to store the filtrate, reduce filtrate leakage, and improve filtrate utilization. At the same time, the number of filter plates in the cylinder can be flexibly set according to the quality of the filtrate, and the filter plates can be pressed in different positions by the cover, making it more flexible to use.

[0025] Optionally, the bottom of the support portion is provided with a slot, the slot is provided on the outer peripheral surface of the support portion, and the top of the support portion is provided with a tooth, the tooth being provided in correspondence with the slot.

[0026] By adopting the above technical solution, when in use, by engaging the teeth of adjacent filter plates in the slots, two adjacent filter plates can be connected together and initially fixed. After connecting the required number of filter plates together, they can be placed inside the cylinder, or the connected filter plates can be taken out of the cylinder together. This reduces the need for repeated placement or removal of filter plates and improves ease of use.

[0027] In summary, this utility model has at least one of the following beneficial technical effects:

[0028] When graphene paste is filtered by using air pressure to drive the diaphragm, the diaphragm changes shape as the paste gradually hardens, achieving flexible pressure application. This reduces the hard contact caused by local pressure concentration and minimizes the impact on the properties of the graphene paste. At the same time, the internal pressure of the gas driving the diaphragm is equal, allowing the diaphragm to apply pressure to the graphene paste more evenly when it is squeezed. This results in a more balanced water content throughout the graphene paste after filtration.

[0029] By connecting the spaces for holding filtrate between multiple filter plates using connecting pipes, it is no longer necessary to pour the filtrate layer by layer; the filtrate can be poured directly from the top connecting pipe, making it more convenient to use.

[0030] By connecting the drainage chambers of multiple filter plates with drainage pipes, it is convenient to discharge the liquid collected in multiple filter plates in a unified manner. By connecting the pressure chambers of multiple filter plates with air guide pipes, it is convenient to introduce high-pressure gas into the pressure chambers of multiple filter plates in a unified manner, making operation and use more convenient.

[0031] By installing hydraulic components on the cover, which press against the top of the cover, the cover presses down on multiple filter plates, effectively sealing the cavities between the filter plates used to store filtrate, reducing filtrate leakage, and improving filtrate utilization. At the same time, the number of filter plates in the cylinder can be flexibly set according to the quality of the filtrate, and the filter plates can be pressed down at different positions by the cover, making it more flexible to use. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0033] Figure 2 This is an exploded view of the structure according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the internal structure of an embodiment of this application;

[0035] Figure 4 yes Figure 3 Enlarged view of a section at point I;

[0036] Figure 5 This is a schematic diagram of the filter plate structure according to an embodiment of this application;

[0037] Figure 6 yes Figure 5 Another perspective view;

[0038] Figure 7 This is a schematic diagram of the internal structure of the filter plate according to an embodiment of this application.

[0039] Explanation of reference numerals in the attached drawings: 100, cylinder; 101, drain hole; 200, cover; 210, water inlet pipe; 211, first insertion part; 220, valve body; 300, filter plate; 310, support part; 311, first insertion hole; 312, second insertion hole; 313, slot; 314, locking tooth; 320, partition part; 330, water filtration part; 331, drain chamber; 332, guide surface; 340, diaphragm part; 341, pressure chamber; 350, connecting pipe; 351, second insertion part; 360, drain pipe; 361, third insertion part; 370, air guide pipe; 371, fourth insertion part; 400, hydraulic component; 410, support frame; 420, hydraulic cylinder. Detailed Implementation

[0040] The following combination Figures 1 to 7 The present invention will be described in further detail below.

[0041] This utility model discloses a graphene paste pressure filtration device. (Refer to...) Figures 1 to 3 A graphene paste pressure filtration device mainly includes a cylinder 100, a cover 200, a hydraulic assembly 400 for pressing the cover 200, and multiple filter plates 300 disposed inside the cylinder 100. The multiple filter plates 300 are stacked inside the cylinder 100. The cover 200 is pressed onto the filter plates 300 inside the cylinder 100 by the hydraulic assembly 400. The filter plates 300 are provided with a water filtration section 330 for filtration and a diaphragm section 340 for applying pressure. The diaphragm section 340 is provided with a pressure chamber 341. During operation, the filtrate is placed above the water filtration section 330 of the filter plate 300. Then, high-pressure gas is introduced into the pressure chamber 341, causing the diaphragm section 340 to expand downward. The diaphragm section 340 of the upper filter plate 300 can press and filter the filtrate on the lower filter plate 300 to reduce the liquid content in the filtrate.

[0042] Reference Figure 1The cylinder 100 is cylindrical in shape, with a drain hole 101 at the bottom and a filter screen supported thereon. Filter plates 300 can be stacked one by one on top of the filter screen during use. The cover 200 is located at the top opening of the cylinder 100, with the diameter of the cover 200 being the same as the inner diameter of the cylinder 100. A sealing ring is provided on the outer wall of the cover 200. A water inlet pipe 210 is provided in the middle of the cover 200, passing through it. The water inlet pipe 210 passes under the cover 200 and extends to the lower end face of the cover 200 to form a first insertion part 211. A valve body 220 is also provided on the water inlet pipe 210, which is fixedly located above the cover 200 to control the opening and closing of the water inlet pipe 210. A through hole is also provided on the side of the cover 200 for connecting an air pipe to the inside of the cylinder 100. The cover 200 and the cylinder 100 are connected by a hydraulic assembly 400.

[0043] Reference Figure 2 The hydraulic assembly 400 includes a support frame 410 and a hydraulic cylinder 420. The support frame 410 includes a metal bracket welded to the outer wall of the cylinder 100 and a crossbeam for connecting the hydraulic cylinders 420. There are two hydraulic cylinders 420. The cylinder bodies of the two hydraulic cylinders 420 are fixedly mounted on the crossbeam, and the piston rods of the two hydraulic cylinders 420 are fixedly mounted on the top of the cover 200. The crossbeam and the metal bracket on the outer wall of the cylinder 100 are connected by a snap fastener. When installing the cover 200, the crossbeam is fixedly mounted on the metal bracket on the outer wall of the cylinder 100 by the snap fastener. Then, the extension distance of the hydraulic cylinders 420 is adjusted so that the cover 200 can move inside the cylinder 100 and press the cover 200 against the filter plate 300 inside the cylinder 100.

[0044] Reference Figures 5 to 6 The filter plate 300 includes a support part 310, a partition part 320, a water filtration part 330, a diaphragm part 340, and a connecting pipe 350. The support part 310 has an annular structure, and the outer diameter of the support part 310 is the same as the inner diameter of the cylinder 100. The top and bottom of the support part 310 are provided with sealing structures supported by rubber gaskets. The top of the support part 310 is provided with a protruding locking tooth 314 structure, and the bottom of the support part 310 is provided with an upwardly recessed locking groove 313 structure. Both the locking tooth 314 and the locking groove 313 are provided with protruding structures, so that after the locking tooth 314 is engaged in the locking groove 313, the protruding structures of the locking tooth 314 and the protruding structures of the locking groove 313 can be locked together. The locking tooth 314 and the locking groove 313 are correspondingly arranged so that adjacent filter plates 300 can be connected through the locking tooth 314 and the locking groove 313.

[0045] Reference Figures 5 to 6A partition 320 is disposed in the middle of the support 310, dividing the support 310 into upper and lower spaces. A circular hole is formed in the middle of the partition 320, and a connecting pipe 350 is fixedly installed in the circular hole in the middle of the partition and sealed. The filter section 330 is annularly arranged, with its outer annular surface fixedly disposed on the support 310 and its inner annular surface fixedly disposed on the outer circumferential surface of the connecting pipe 350, thus forming a drainage cavity 331 between the filter section 330 and the partition 320. The height of the filter section 330 is lower than the height of the support 310, so that the filter section 330... The upper part 330 can be used to hold the filtrate. Filter holes are opened on the water filtration part 330. When the liquid in the filtrate is discharged, it can be collected in the drain chamber 331 through the filter holes. At the same time, the height of the water filtration part 330 is lower than the height of the connecting pipe 350, so that a part of the connecting pipe 350 extending from the water filtration part 330 forms a second insertion part 351. The size of the second insertion part 351 is larger than that of the first insertion part 211, and an annular sealing ring is provided in the second insertion part 351. When the cover 200 is pressed on the filter plate 300, the first insertion part 211 will be inserted into the second insertion part 351 and sealed by the annular sealing ring.

[0046] To facilitate the rapid discharge of liquid collected in the drainage chamber 331, the support part 310 is provided with a through hole, which is connected to the bottom of the drainage chamber 331, forming a drainage pipe 360. A third insertion part 361 is provided on the lower end face of the support part 310 corresponding to the drainage pipe 360. The third insertion part 361 is a metal quick-connect connector welded to the support part 310. A first insertion hole 311 is provided at the top of the support part 310, and an annular sealing ring is provided in the second insertion hole 312. When multiple filter plates 300 are stacked, the third insertion part 361 on adjacent filter plates 300 will be inserted into the first insertion hole 311 and sealed by the annular sealing ring, connecting the drainage chambers 331 of multiple filter plates 300, and the liquid will be discharged from the bottom of the cylinder 100 through the drainage pipe 360.

[0047] Reference Figure 6 The bottom of the drain cavity 331 is also provided with a guide surface 332. The lowest point of the guide surface 332 is located at the position where the drain pipe 360 ​​connects with the drain cavity 331, so that the liquid inside the drain cavity 331 can flow along the guide surface 332 into the drain pipe 360, which can improve the efficiency of draining the liquid from the drain cavity 331.

[0048] Reference Figures 5 to 6The diaphragm part 340 is made of a flexible rubber membrane with elasticity. The diaphragm part 340 is fixedly disposed below the partition part 320 and is arranged in a ring shape. The outer edge of the diaphragm part 340 is fixedly disposed on the support part 310 and the inner edge is fixedly disposed on the outer peripheral surface of the connecting pipe 350. The diaphragm part 340 is sealed with the support part 310 and the connecting pipe 350, so that a pressure chamber 341 is formed between the diaphragm part 340 and the partition part 320.

[0049] To facilitate the introduction of high-pressure gas into the pressure chamber 341, a through hole is provided on the support part 310. The through hole communicates with the inside of the pressure chamber 341 to form a gas guide pipe 370. A plug-in connector is welded to the upper end face of the support part 310 at the position corresponding to the gas guide hole to form a fourth plug-in part 371. A second plug-in hole 312 is provided on the bottom surface of the corresponding support part 310. The position of the second plug-in hole 312 corresponds to the position of the fourth plug-in part 371, so that when the filter plates 300 are stacked, the fourth plug-in part 371 on the filter plate 300 can be inserted into the second plug-in hole 312. In order to increase the sealing performance of the fourth plug-in part 371 and the second plug-in hole 312, a sealing structure is provided inside the second plug-in hole 312.

[0050] In this embodiment, the filter plates 300 stacked inside the cylinder 100 have the same structure. When in use, the top of the connecting pipe 350 and the bottom of the air guide pipe 370 of the filter plate 300 placed at the bottom of the cylinder 100 should be sealed to reduce the leakage of filtrate from the connecting pipe 350 and gas from the air guide pipe 370.

[0051] The implementation principle of the graphene paste pressure filtration device of this utility model embodiment is as follows: In use, multiple filter plates 300 are first stacked. During stacking, the third insertion part 361, which communicates with the drain pipe 360, is inserted into the first insertion hole 311 of the adjacent filter plate 300, and the fourth insertion part 371, which communicates with the pressure chamber 341, is inserted into the second insertion hole 312 of the adjacent filter plate 300. By pressing, the locking teeth 314 of the adjacent filter plates 300 are engaged in the corresponding locking grooves 313, thus connecting the multiple filter plates 300 together. Next, the connected filter plates 300 are placed together in the cylinder 100, and then the cover 200 is placed... Above the cylinder 100, the cover 200 is pressed onto the filter plate 300 inside the cylinder 100 by the hydraulic assembly 400. When the cover 200 is pressed onto the filter plate 300, the first insertion part 211 on the cover 200 will be inserted into the second insertion part 351 of the filter plate 300. Finally, the valve body 220 is opened to add filtrate into the filter plate 300 through the water inlet pipe 210. The filtrate will fill the gaps between the filter plates 300. After the filtrate is filled, the valve body 220 is closed. By connecting the air pipe and the air guide pipe 370, high-pressure air is introduced into the pressure chamber 341, which allows the diaphragm part 340 to press and filter the filtrate on the filter plate 300 below.

[0052] In summary, when the graphene paste is filtered by using air pressure to drive the diaphragm, the diaphragm changes shape as the paste gradually hardens, achieving flexible pressure application. This reduces the hard contact caused by local pressure concentration and minimizes the impact on the performance of the graphene paste. At the same time, the internal pressure of the gas that drives the diaphragm 340 to bulge is equal, allowing the diaphragm 340 to apply pressure to the graphene paste more evenly when squeezing it. As a result, the water content inside the graphene paste is more balanced after filtration.

[0053] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made according to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A graphene paste pressure filtration device, characterized in that, include: Cylinder (100), cover (200) and multiple filter plates (300); The bottom of the cylinder (100) is provided with a drainage hole (101). The filter plate (300) includes a support part (310), a partition part (320), a water filtration part (330) and a membrane part (340). The support part (310) is cylindrical and has a sealing structure at both the top and bottom. The water filter section (330) is covered above the opening of the support section (310), and a plurality of filter holes are evenly distributed on the water filter section (330). The height of the water filter section (330) is lower than the top of the support section (310). The diaphragm part (340) covers the bottom opening of the support part (310), the partition part (320) is disposed between the water filter part (330) and the diaphragm part (340), and a drain cavity (331) is formed between the partition part (320) and the water filter part (330), and the drain cavity (331) communicates with the outside. A pressure chamber (341) is formed between the partition portion (320) and the diaphragm portion (340), and the pressure chamber (341) is connected to an external air source; Multiple filter plates (300) are stacked inside the cylinder (100), and the multiple filter plates (300) are sealed together. The cover (200) is disposed on the top of the cylinder (100) and is used to abut against the filter plate (300) on the top.

2. The graphene paste pressure filtration device according to claim 1, characterized in that: The filter plate (300) is also provided with a connecting pipe (350), the top of the connecting pipe (350) is connected to the top of the water filtration section (330), the bottom of the connecting pipe (350) is connected to the bottom of the diaphragm section (340), and the water filtration section (330) and the diaphragm section (340) are sealed with the connecting pipe (350).

3. The graphene paste pressure filtration device according to claim 2, characterized in that: The cover (200) is provided with a water inlet pipe (210) and a valve body (220). The valve body (220) is fixedly installed on the water inlet pipe (210) and is used to control the opening and closing of the water inlet pipe (210).

4. The graphene paste pressure filtration device according to claim 3, characterized in that: The water inlet pipe (210) is provided with a first plug part (211) at the bottom and the connecting pipe (350) is provided with a second plug part (351) at the top. The first plug part (211) and the second plug part (351) are provided correspondingly.

5. A graphene paste pressure filtration device according to any one of claims 1-4, characterized in that: The support (310) is also provided with a drain pipe (360), one end of which is connected to the drain cavity (331), and the other end is provided with a third plug-in part (361). The support part (310) is provided with a first insertion hole (311) at the top. The first insertion hole (311) is connected to the drainage cavity (331). The third insertion part (361) is provided in cooperation with the first insertion hole (311). The first insertion hole (311) is provided with a sealing structure inside.

6. The graphene paste pressure filtration device according to claim 5, characterized in that: The bottom of the drainage cavity (331) is provided with a flow guide surface (332), and one end of the drainage pipe (360) that connects to the inside of the drainage cavity (331) is located at the lowest position of the flow guide surface (332).

7. A graphene paste pressure filtration device according to any one of claims 1-4, characterized in that: The support (310) is also provided with an air guide pipe (370), one end of which is connected to the inside of the pressure chamber (341), and the other end is provided with a fourth plug-in part (371). The support part (310) is provided with a second insertion hole (312) at the bottom. The second insertion hole (312) is connected to the pressure chamber (341). The fourth insertion part (371) is configured to cooperate with the second insertion hole (312). The second insertion hole (312) is provided with a sealing structure inside.

8. A graphene paste pressure filtration device according to any one of claims 1-4, characterized in that: It also includes a hydraulic assembly (400), which includes a support frame (410) and a hydraulic cylinder (420). The support frame (410) is fixedly mounted on the cylinder (100). One end of the hydraulic cylinder (420) is fixedly mounted on the support frame (410), and the cover (200) is mounted on the other end of the hydraulic cylinder (420). The hydraulic cylinder (420) is used to drive the cover (200) to move along the depth direction of the cylinder (100).

9. A graphene paste pressure filtration device according to any one of claims 1-4, characterized in that: The bottom of the support part (310) is provided with a slot (313), the slot (313) is provided on the outer peripheral surface of the support part (310), and the top of the support part (310) is provided with a tooth (314), the tooth (314) is provided in correspondence with the slot (313).

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