CN108439388B

CN108439388B - Graphene preparation system

Info

Publication number: CN108439388B
Application number: CN201810568836.XA
Authority: CN
Inventors: 刘强
Original assignee: Guangzhou Shengmen New Material Technology Co Ltd
Current assignee: Guangzhou Shengmen New Material Technology Co., Ltd
Priority date: 2018-06-05
Filing date: 2018-06-05
Publication date: 2020-05-12
Anticipated expiration: 2038-06-05
Also published as: CN108439388A

Abstract

The invention belongs to the technical field of graphene production, and particularly relates to a graphene preparation system which comprises a box body, a feeding pipe, an air inlet pipe, a finished product conveying pipe, a microwave emitter and a swing module; the top of the box body is provided with a feeding pipe; the bottom of the box body is provided with an air inlet pipe, and the air inlet pipe can inject inert gas or compressed air into the box body; the finished product conveying pipe is arranged at the top of the box body on one side of the feeding pipe; the inner wall of the box body is provided with a microwave emitter; the swing module is arranged in the middle of the box body and is used for placing the oxidized graphite particles; according to the invention, the swing module is arranged, and the vibration of the swing module is used for avoiding the influence on the generation of graphene caused by the accumulation of raw materials; by arranging the vibration module, the graphite particles are prevented from being accumulated on the local part of the placing vessel, and the blockage of the feed hopper is avoided; rock the module through the setting for graphite granules rocks in placing the ware, avoids the raw materials to pile up and influence the production of graphite alkene.

Description

Graphene preparation system

Technical Field

The invention belongs to the technical field of graphene production, and particularly relates to a graphene preparation system.

Background

Currently, a method for preparing graphene, a special material, includes: a light rubbing method or a tape tearing method (sticking HOPG), a heating SiC method, a metal substrate chemical vapor deposition method, a redox method, and the like. The first three methods are not suitable for large-scale production of graphene due to low yield or expensive equipment, complicated process and the like, and the redox method is relatively more suitable for large-scale production due to the advantage of high yield.

However, the chemical reducing agent (such as hydrazine hydrate) adopted by the traditional oxidation-reduction method has very high toxicity, so that the reduction method poses great threat to the health of human bodies and the environmental protection, and the thermal reduction method has the advantages of rapidness and thorough reduction; but because the heating is generally carried out at a high temperature of over 1000 ℃, the energy consumption of the whole process is increased. Moreover, this method requires a high-temperature heating furnace or the like, which is relatively expensive. The microwave irradiation heating has the characteristics of high speed, low cost, simple use and the like, black fluffy graphene powder can be obtained within one minute by irradiating graphite oxide particles, but the common microwave irradiation is carried out in the air, the graphene obtained by reduction is very easy to burn and even cause fire under the microwave irradiation, and the potential safety threat is brought to the industrial application of the microwave method for producing the graphene. Moreover, the graphene obtained by microwave irradiation has high bulkiness, is light and easy to fly, and is difficult to collect. These problems become obstacles to the industrial production of graphene by microwave irradiation

Also some technical scheme of graphite alkene production have appeared among the prior art, chinese patent as application number 2017109529781 discloses a towards needle precision detection frock, include microwave cavity, microwave emitter, vibrating mass, backup pad, place ware, spring, feeder hopper and finished product receiving flask, microwave cavity top left side is equipped with the feeder hopper, the feeder hopper runs through the microwave cavity upper wall, just still be equipped with in the feeder hopper and seal the stopper, feeder hopper export below is equipped with places the ware, it is equipped with the vibrating mass to place the ware below, the elongated slot that has the bisymmetry is opened to the vibrating mass upper surface.

The technical scheme can ensure that the oxidized graphite particles are flatly laid on the placing vessel, so that the oxidized graphite particles can fully and uniformly receive microwave irradiation; however, the vibration of the scheme is insufficient, and no effective measure is provided for preventing blockage and partial accumulation during charging, so that the graphene production efficiency of the scheme is low.

Disclosure of Invention

In order to make up for the defects of the prior art, the graphene preparation system provided by the invention avoids the influence on the generation of graphene caused by the accumulation of raw materials through the vibration of the swing module; by arranging the vibration module, the graphite particles are prevented from being accumulated on the local part of the placing vessel, and the blockage of the feed hopper is avoided; rock the module through the setting for graphite granules rocks in placing the ware, avoids the raw materials to pile up and influence the production of graphite alkene.

The technical scheme adopted by the invention for solving the technical problems is as follows: the graphene preparation system comprises a box body, a feeding pipe, an air inlet pipe, a finished product conveying pipe, a microwave emitter and a swing module, wherein the feeding pipe is arranged on the box body; the top of the box body is provided with a feeding pipe; the bottom of the box body is provided with an air inlet pipe, and the air inlet pipe can inject inert gas or compressed air into the box body; the finished product conveying pipe is arranged at the top of the box body on one side of the feeding pipe; a microwave emitter is arranged on the inner wall of the box body; the swing module is arranged in the middle of the box body and is used for placing oxidized graphite particles; the swing module comprises a cross rod, a sliding block, a push rod, a rolling shaft, an installation block, a telescopic rod and a placing vessel; the cross bar is fixedly arranged in the middle of the box body; the bottoms of the two parallel cross rods are provided with sliding blocks in a sliding way; the sliding block is controlled to slide by a push rod arranged on the inner wall of the box body; the tops of the two parallel cross rods are provided with rolling shafts; the middle part of the rolling shaft is provided with an installation block; the bottom of the mounting block is connected with a sliding block through a spring; the top of the mounting block supports the placing vessel through a group of telescopic rods.

The rolling shaft can roll on the cross rod; a group of grooves are arranged at the tops of the two cross rods; the group of grooves form a Z shape, and baffles are arranged on the side edges of the grooves; when one end of the roller falls into one groove, the baffle can block the end of the roller after the roller is inclined. During work, after oxidized graphite particles are added into a placing vessel of the swing module from the feeding pipe, the graphite particles are irradiated by a microwave emitter to prepare graphene powder, inert gas is input into the air inlet pipe to protect the production of graphene, and compressed air is injected into the box body from the air inlet pipe after the graphene is produced; the compressed air pushes the graphene to be output from a finished product output pipe above the graphene; in order to avoid the raw materials to pile up, accessible push rod promotes the roller bearing and slides along the horizontal pole, fall into a recess when the one end of roller bearing, the other end of roller bearing is still on the horizontal pole, the one end of slope roller bearing is supported motionlessly by the baffle of recess one side, the other end of roller bearing then slides along the horizontal pole, also fall into the recess until the other end, just can follow the roll-off in the recess after the roller bearing is balanced, circulate in proper order, through arranging into the Z type with a set of recess, make the roller bearing wrench movement, and then drive and place the ware wrench movement, avoid the raw materials to pile up and influence the.

Preferably, the feeding pipe is obliquely arranged; a vibration module arranged at the top of the box body is arranged below the feeding pipe; the vibration module comprises a feed hopper, a rotating plate and a connecting rod; a notch is formed in the top of the box body, one side of the feed hopper is installed in the middle of the notch through a rotating shaft, and a torsion spring is arranged in the rotating shaft of the feed hopper; a rotating plate is rotatably arranged on one side of the bottom of the feed hopper; one end of the connecting rod is hinged to the middle of the rotating plate; the other end of the connecting rod is hinged to the top of the box body. During operation, when graphite particles after oxidation are added to the placing vessel through the inlet pipe, the inlet pipe is obliquely arranged, the input graphite particles impact one side of the feeding hopper, the feeding hopper swings, the lower end of the feeding hopper swings correspondingly, the graphite particles are prevented from being accumulated in the local placing vessel, and meanwhile, the swinging feeding hopper is under the action of the connecting rod, so that the rotating plate on one side of the bottom of the feeding hopper is intermittently opened and closed, and the blockage of the feeding hopper is avoided.

Preferably, a shaking module is arranged on one side of the bottom of the placing dish; the shaking module comprises a top plate, a first bottom plate, a second bottom plate, a balancing weight, a first supporting rod and a second supporting rod; the top plate is arranged at the bottom of the placing vessel through a spring; the first bottom plate is rotatably connected with the second bottom plate; the counterweight block is arranged at the joint of the first bottom plate and the second bottom plate; the middle part of the first supporting rod is rotatably connected with the middle part of the second supporting rod, and one end of the first supporting rod is hinged to the bottom of one end of the top plate; the other end of the first supporting rod is hinged to one end of the second bottom plate; one end of the second supporting rod is hinged to the bottom of the other end of the top plate; the other end of the second supporting rod is hinged to one end of the first bottom plate. The during operation, first bottom plate and second bottom plate keep straight when sliding on the horizontal pole, when the balancing weight of first bottom plate and second bottom plate handing-over department reachd the recess top, the balancing weight extrusion makes first bottom plate and second bottom plate rotate relatively, will place this one side jack-up of ware through first bracing piece and second bracing piece, through intermittent type nature jack-up, rock for graphite particles rocks in placing the ware, avoids the raw materials to pile up and influence the production of graphite alkene.

Preferably, the bottom surface of the groove is provided with a group of compression rods, and the ends of the compression rods are provided with arc-shaped stop blocks. During operation, the roller bearing falls into the recess from the horizontal pole in, produces great impact to the roller bearing, and permanent motion can cause the roller bearing crooked, can play the cushioning effect through setting up arc dog can the roller bearing.

Preferably, the inner arc surface of the arc-shaped stop block is provided with a convex arc-shaped elastic sheet; the end of the roller is rotatably provided with a rotating ring; the outer ring of the swivel is provided with a group of arc-shaped grooves corresponding to the arc-shaped elastic sheets. During operation, the roller bearing falls into the recess from the horizontal pole in, produces great impact to the roller bearing, and permanent motion can cause the roller bearing crooked, can play the cushioning effect through setting up arc dog, and the roller bearing falls from one side of recess, strikes the arc dog, and arc recess and arc shell fragment cooperate, and the relative roller bearing of drive change rotates, converts the impact force into the revolving force, improves the cushioning effect to the roller bearing greatly.

The invention has the following beneficial effects:

1. according to the invention, the swing module is arranged, and the vibration of the swing module is used for avoiding the influence on the generation of graphene caused by the accumulation of raw materials; by arranging the vibration module, the graphite particles are prevented from being accumulated on the local part of the placing vessel, and the blockage of the feed hopper is avoided; rock the module through the setting for graphite granules rocks in placing the ware, avoids the raw materials to pile up and influence the production of graphite alkene.

2. According to the invention, the swing module is arranged, the roller is twisted by arranging the roller and the group of grooves which are arranged to form the Z-shaped groove, so that the placing vessel is driven to be twisted, and the phenomenon that the raw materials are accumulated to influence the production of graphene is avoided.

3. According to the invention, the swinging module is arranged, when the balancing weight of the swinging module reaches the upper part of the groove, the balancing weight extrudes and enables the first bottom plate and the second bottom plate to relatively rotate, the side of the placing vessel is jacked up through the first supporting rod and the second supporting rod, and graphite particles are swung in the placing vessel through intermittent jacking and swinging, so that the phenomenon that the raw materials are accumulated to influence the production of graphene is avoided.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a block diagram of the slosh module of the present invention;

FIG. 4 is a view of the arcuate block of the present invention;

in the figure: box 1, inlet pipe 2, intake pipe 3, finished product conveyer pipe 4, microwave emitter 5, swing module 6, horizontal pole 61, slider 62, push rod 63, roller 64, installation piece 65, telescopic link 66, place ware 67, recess 68, baffle 69, vibration module 7, feeder hopper 71, rotor plate 72, connecting rod 73, rock module 8, roof 81, first bottom plate 82, second bottom plate 83, balancing weight 84, first bracing piece 85, second bracing piece 86, compression bar 91, arc dog 92, arc shell fragment 93, swivel 94, arc recess 95.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 4, the graphene preparation system according to the present invention includes a box 1, a feeding pipe 2, an air inlet pipe 3, a finished product conveying pipe 4, a microwave emitter 5, and a swing module 6; the top of the box body 1 is provided with a feeding pipe 2; the bottom of the box body 1 is provided with an air inlet pipe 3, and the air inlet pipe 3 can inject inert gas or compressed air into the box body 1; the finished product conveying pipe 4 is arranged at the top of the box body 1 on one side of the feeding pipe 2; a microwave emitter 5 is arranged on the inner wall of the box body 1; the swing module 6 is arranged in the middle of the box body 1, and the swing module 6 is used for placing oxidized graphite particles; the swing module 6 comprises a cross bar 61, a slide block 62, a push rod 63, a roller 64, a mounting block 65, a telescopic rod 66 and a placing dish 67; the cross bar 61 is fixedly arranged in the middle of the box body 1; the bottom parts of the two parallel cross rods 61 are provided with sliding blocks 62 in a sliding way; the sliding block 62 is controlled to slide by a push rod 63 arranged on the inner wall of the box body 1; the tops of the two parallel cross rods 61 are provided with rolling shafts 64; the middle part of the roller 64 is provided with a mounting block 65; the bottom of the mounting block 65 is connected with a sliding block 62 through a spring; the top of the mounting block 65 supports a boat 67 by a set of telescoping rods 66.

The roller 64 can roll on the cross bar 61; a group of grooves 68 are arranged at the tops of the two cross rods 61; a group of grooves 68 form a Z shape, and baffles 69 are arranged on the side edges of the grooves 68; when one end of the roller 64 drops into one of the grooves 68, the roller 64 tilts and the stop 69 can stop the end of the roller 64. During work, after oxidized graphite particles are added into the placing vessel 67 of the swing module 6 from the feeding pipe 2, the oxidized graphite particles are irradiated by the microwave emitter 5 to prepare graphene powder, inert gas is input into the air inlet pipe 3 to protect the production of graphene, and compressed air is injected into the box body 1 from the air inlet pipe 3 after the graphene is produced; the compressed air pushes the graphene to be output from the finished product output pipe 11 above; in order to avoid raw material accumulation, the roller 64 can be pushed by the push rod 63 to slide along the cross rod 61, when one end of the roller 64 falls into one groove 68, the other end of the roller 64 is still arranged on the cross rod 61, one end of the inclined roller 64 is supported and fixed by the baffle 69 on one side of the groove 68, the other end of the roller 64 slides along the cross rod 61 until the other end of the roller also falls into the groove 68, the roller 64 can slide out of the groove 68 after being balanced, the processes are sequentially circulated, and the roller 64 is twisted by arranging a group of grooves 68 into a Z shape, so that the placing vessel 67 is driven to twist, and the raw material accumulation is avoided to influence the production of graphene.

As an embodiment of the present invention, the feeding pipe 2 is arranged obliquely; a vibration module 7 arranged at the top of the box body 1 is arranged below the feeding pipe 2; the vibration module 7 comprises a feed hopper 71, a rotating plate 72 and a connecting rod 73; a notch is formed in the top of the box body 1, one side of the feed hopper 71 is installed in the middle of the notch through a rotating shaft, and a torsion spring is arranged in the rotating shaft of the feed hopper 71; a rotating plate 72 is rotatably arranged on one side of the bottom of the feed hopper 71; one end of the connecting rod 73 is hinged to the middle part of the rotating plate 72; the other end of the connecting rod 73 is hinged on the top of the box body 1. During operation, when adding the graphite granule after the oxidation to placing ware 67 through inlet pipe 2, through setting up inlet pipe 2 slope, the graphite granule of input strikes one side of feeder hopper 71 for feeder hopper 71 swings, and the corresponding lower extreme that makes feeder hopper 71 swings, avoids graphite granule to pile up in the part of placing ware 67, and wobbling feeder hopper 71 makes the rotating plate 72 intermittent type of feeder hopper 71 bottom one side open and shut under the effect of connecting rod 73 simultaneously, avoids the jam of feeder hopper 71.

As an embodiment of the present invention, a shaking module 8 is disposed on one side of the bottom of the placing vessel 67; the shaking module 8 comprises a top plate 81, a first bottom plate 82, a second bottom plate 83, a balancing weight 84, a first supporting rod 85 and a second supporting rod 86; the top plate 81 is arranged at the bottom of the placing dish 67 through a spring; the first bottom plate 82 and the second bottom plate 83 are rotatably connected; the counterweight 84 is arranged at the joint of the first bottom plate 82 and the second bottom plate 83; the middle part of the first supporting rod 85 is rotatably connected with the middle part of the second supporting rod 86, and one end of the first supporting rod 85 is hinged to the bottom of one end of the top plate 81; the other end of the first supporting rod 85 is hinged to one end of the second bottom plate 83; one end of the second supporting rod 86 is hinged to the bottom of the other end of the top plate 81; the other end of the second support bar 86 is hinged to one end of the first base plate 82. During operation, first bottom plate 82 and second bottom plate 83 keep straight when sliding on horizontal pole 61, when the balancing weight 84 of first bottom plate 82 and second bottom plate 83 handing-over department reachs recess 68 top, balancing weight 84 extrudees and makes first bottom plate 82 and second bottom plate 83 rotate relatively, will place this one side jack-up of ware 67 through first bracing piece 85 and second bracing piece 86, through intermittent type's jack-up, rock, make graphite particle rock in placing ware 67, avoid the raw materials to pile up and influence the production of graphite alkene.

In one embodiment of the present invention, the bottom of the groove 68 is provided with a set of compression bars 91, and the ends of the compression bars 91 are provided with arc-shaped stoppers 92. In operation, the roller 64 falls into the groove 68 from the cross rod 61, large impact is generated on the roller 64, the roller 64 is bent due to long-term movement, and the roller 64 can play a role in buffering by arranging the arc-shaped stop block 92.

As an embodiment of the present invention, the inner arc surface of the arc-shaped block 92 is provided with a convex arc-shaped elastic sheet 93; a rotating ring 94 is rotatably arranged at the end of the roller 64; the outer ring of the swivel 94 is provided with a group of arc grooves 95 corresponding to the arc spring pieces 93. In the during operation, roller bearing 64 falls into recess 68 from horizontal pole 61 in, produce great impact to roller bearing 64, permanent motion can cause roller bearing 64 crooked, can roller bearing 64 play the cushioning effect through setting up arc dog 92 dog, and roller bearing 64 falls from one side of recess 68, strikes arc dog 92, and arc recess 95 cooperatees with arc shell fragment 93, and drive swivel 94 rotates relative roller bearing 64, converts the impact force into the revolving force, improves the cushioning effect to roller bearing 64 greatly.

During operation, when oxidized graphite particles are added into the placing vessel 67 through the feeding pipe 2, the feeding pipe 2 is obliquely arranged, the input graphite particles impact one side of the feeding hopper 71, so that the feeding hopper 71 swings, the lower end of the feeding hopper 71 correspondingly swings, the graphite particles are prevented from being locally accumulated on the placing vessel 67, and meanwhile, the swinging feeding hopper 71 enables the rotating plate 72 on one side of the bottom of the feeding hopper 71 to be intermittently opened and closed under the action of the connecting rod 73, so that the blockage of the feeding hopper 71 is avoided; irradiating graphite oxide particles by a microwave emitter 5 to prepare graphene powder, inputting inert gas into an air inlet pipe 3 to protect the production of graphene, and injecting compressed air into a box body 1 from the air inlet pipe 3 after the graphene is produced; the compressed air pushes the graphene to be output from the finished product output pipe 11 above; in order to avoid raw material accumulation, the roller 64 can be pushed by the push rod 63 to slide along the cross rod 61, when one end of the roller 64 falls into one groove 68, the other end of the roller 64 is still on the cross rod 61, one end of the inclined roller 64 is supported by the baffle 69 on one side of the groove 68 and is not moved, the other end of the roller 64 slides along the cross rod 61 until the other end of the roller also falls into the groove 68, the roller 64 can slide out of the groove 68 after being balanced, the processes are sequentially circulated, and the roller 64 is twisted by arranging a group of grooves 68 into a Z shape, so that the placing vessel 67 is driven to be twisted, and the raw material accumulation is avoided to influence the production of graphene; when the roller 64 falls into the groove 68 from the cross rod 61, the roller 64 falls to generate large impact, the roller 64 is bent due to long-term movement, the roller 64 can play a buffering role by arranging the arc-shaped stop 92, the roller 64 falls from one side of the groove 68 to impact the arc-shaped stop 92, the arc-shaped groove 95 is matched with the arc-shaped elastic sheet 93, the rotating ring 94 is driven to rotate relative to the roller 64, the impact force is converted into rotating force, and the buffering effect on the roller 64 is greatly improved; meanwhile, the first bottom plate 82 and the second bottom plate 83 are kept flat when sliding on the cross rod 61, when the counterweight block 84 at the joint of the first bottom plate 82 and the second bottom plate 83 reaches the upper part of the groove 68, the counterweight block 84 is extruded and enables the first bottom plate 82 and the second bottom plate 83 to rotate relatively, the side of the placing vessel 67 is jacked up through the first supporting rod 85 and the second supporting rod 86, and the graphite particles are jacked and rocked in the placing vessel 67 through intermittent jacking and rocking, so that the raw materials are prevented from being stacked to influence the production of the graphene.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A graphene preparation system comprises a box body (1), a feeding pipe (2), an air inlet pipe (3), a finished product conveying pipe (4), a microwave emitter (5) and a swing module (6); the top of the box body (1) is provided with a feeding pipe (2); the bottom of the box body (1) is provided with an air inlet pipe (3), and the air inlet pipe (3) can inject inert gas or compressed air into the box body (1); the finished product conveying pipe (4) is arranged at the top of the box body (1) on one side of the feeding pipe (2); a microwave emitter (5) is arranged on the inner wall of the box body (1); the swing module (6) is arranged in the middle of the box body (1), and the swing module (6) is used for placing oxidized graphite particles; the method is characterized in that: the swing module (6) comprises a cross rod (61), a sliding block (62), a push rod (63), a rolling shaft (64), a mounting block (65), a telescopic rod (66) and a placing vessel (67); the cross rod (61) is fixedly arranged in the middle of the box body (1); the bottoms of the two parallel cross rods (61) are provided with sliding blocks (62) in a sliding way; the sliding block (62) is controlled to slide by a push rod (63) arranged on the inner wall of the box body (1); the tops of the two parallel cross rods (61) are provided with rolling shafts (64); the middle part of the roller (64) is provided with a mounting block (65); the bottom of the mounting block (65) is connected with a sliding block (62) through a spring; the top of the mounting block (65) supports a placing vessel (67) through a group of telescopic rods (66); wherein the content of the first and second substances,

the roller (64) can roll on the cross bar (61); the tops of the two cross rods (61) are provided with a group of grooves (68); the group of grooves (68) form a Z shape, and the side edges of the grooves (68) are provided with baffle plates (69); when one end of the roller (64) falls into one groove (68), the baffle (69) can block the end of the roller (64) after the roller (64) is inclined;

the feeding pipe (2) is obliquely arranged; a vibration module (7) arranged at the top of the box body (1) is arranged below the feeding pipe (2); the vibration module (7) comprises a feed hopper (71), a rotating plate (72) and a connecting rod (73); a notch is formed in the top of the box body (1), one side of the feed hopper (71) is installed in the middle of the notch through a rotating shaft, and a torsion spring is arranged in the rotating shaft of the feed hopper (71); a rotating plate (72) is rotatably arranged on one side of the bottom of the feed hopper (71); one end of the connecting rod (73) is hinged to the middle part of the rotating plate (72); the other end of the connecting rod (73) is hinged to the top of the box body (1);

a shaking module (8) is arranged on one side of the bottom of the placing vessel (67); the shaking module (8) comprises a top plate (81), a first bottom plate (82), a second bottom plate (83), a balancing weight (84), a first supporting rod (85) and a second supporting rod (86); the top plate (81) is arranged at the bottom of the placing dish (67) through a spring; the first bottom plate (82) is rotatably connected with the second bottom plate (83); the balancing weight (84) is arranged at the joint of the first bottom plate (82) and the second bottom plate (83); the middle part of the first support rod (85) is rotatably connected with the middle part of the second support rod (86), and one end of the first support rod (85) is hinged to the bottom of one end of the top plate (81); the other end of the first supporting rod (85) is hinged to one end of the second bottom plate (83); one end of the second supporting rod (86) is hinged to the bottom of the other end of the top plate (81); the other end of the second supporting rod (86) is hinged at one end of the first bottom plate (82).

2. The graphene preparation system according to claim 1, wherein: a group of compression rods (91) are arranged on the bottom surface of the groove (68), and arc-shaped stop blocks (92) are arranged at the ends of the compression rods (91).

3. The graphene preparation system according to claim 2, wherein: the inner arc surface of the arc-shaped stop block (92) is provided with a raised arc-shaped elastic sheet (93); a rotating ring (94) is rotatably arranged at the end head of the rolling shaft (64); the outer ring of the rotating ring (94) is provided with a group of arc-shaped grooves (95) corresponding to the arc-shaped elastic sheets (93).