Organ type graphene heat conduction film production line and production method

Abstract

The invention relates to the technical field of graphene heat conduction film production, in particular to an organ type graphene heat conduction film production line and a production method.The organ type graphene heat conduction film production line comprises a stirring tank, supporting legs, a feeding pipe and a liquid level meter, the multiple sets of supporting legs are arranged at the bottom end of the stirring tank, the feeding pipe is installed at the top end of the stirring tank, and the liquid level meter is installed on the stirring tank; the stirring assembly is arranged in the stirring tank, the driving assembly is installed at the top end of the stirring tank, the driving assembly provides driving force for the stirring assembly, the material distributing assembly is installed on the hollow rotating shaft, and the material discharging assembly is installed on the hollow rotating shaft. The material distributing assembly is used for re-scattering the raw materials at the bottom of the stirring tank on the upper part of the stirring tank; when the stirring device is used, raw materials are injected into the stirring tank through the feeding pipe, the driving assembly is started, the driving assembly drives the stirring assembly to rotate, and the raw materials are discharged through the discharging assembly and coated on a flexible graphite plate after being subjected to defoaming treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of graphene thermal conductive film production, and in particular to an accordion-type graphene thermal conductive film production line and a production method. Background Art

[0002] The principle of preparing high thermal conductivity graphite: using natural flake graphite as raw material, taking advantage of the layered structure of graphite, under appropriate reaction conditions, oxygen-containing acid radical ions are intercalated into the graphite interlayer to form a graphite interlayer compound (GIC) with new interlayer properties without destroying the graphite layered structure. After high-temperature heat treatment, the oxygen-containing acid radicals inside the graphite interlayer compound are rapidly vaporized, decomposed, and volatilized, generating huge tension between the graphite layers, causing the expandable graphite to expand rapidly into a worm shape. The worm-like graphite after the expandable graphite is expanded is called expanded graphite. Through rolling, molding and other methods, the worm-like expanded graphite is squeezed and locked together to obtain a flexible graphite sheet with a smooth surface. It is also necessary to make a layer of graphene thermal conductive film on the flexible graphite sheet, but it is not graphitized. After that, the flexible graphite sheet is pre-formed into an accordion-like shape by rolling equipment, and composite pre-pressed: and then extruded into a vertical thermal conductive graphite coil of a certain height, like a folding fan closed. The product is used in an ultra-high temperature environment. It is naturally graphitized during use. It has the softness and elasticity of flexible graphite and the thermal conductivity of graphene.

[0003] In the prior art, the patent document with application number 202211086145.9 discloses a flexible graphene high thermal conductivity film and a preparation method thereof, which comprises the following steps: (1) preparing a graphite oxide suspension having a concentration of at least 50 g / L, and adding a protonic acid to adjust the pH to 2-4; (2) adding a carbon source precursor to the graphite oxide suspension, stirring the mixture evenly, and then performing a high-pressure homogenization treatment to obtain a graphene oxide slurry, wherein the viscosity of the slurry is controlled to be 100-300 Pa•S; (3) performing a degassing treatment, coating the surface of a flexible substrate, drying, and peeling off the graphene oxide film formed on the surface of the flexible substrate; (4) irradiating the graphene oxide film, and then performing a carbonization treatment and a graphitization treatment in sequence to obtain an expanded graphene film, and finally performing multiple calendering to obtain a flexible graphene high thermal conductivity film having an adjustable film thickness of 0.04-1 mm and a thermal conductivity greater than 1650 W / (m•K), which not only has a high thermal conductivity but also has good flexibility.

[0004] During use, it was found that the above method only stirs the raw materials and cannot mix the raw materials in two directions, resulting in low mixing efficiency. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an accordion-type graphene thermal conductive film production line and a production method.

[0006] The present invention discloses an accordion-type graphene thermal conductive film production line and production method, comprising a stirring tank, legs, a feed pipe and a liquid level gauge, wherein the bottom end of the stirring tank is provided with multiple groups of legs, the top end of the stirring tank is provided with a feed pipe, the stirring tank is provided with a liquid level gauge, and further comprises a stirring assembly, a material distribution assembly, a driving assembly and a discharge assembly, wherein the stirring tank is provided with a stirring assembly, the top end of the stirring tank is provided with a driving assembly, the driving assembly provides driving force for the stirring assembly, the material distribution assembly is installed on a hollow rotating shaft, and the material distribution assembly is used to re-distribute the raw materials at the bottom of the stirring tank at the upper part of the stirring tank; when in use, the raw materials are injected into the stirring tank through the feed pipe, the driving assembly is started, the driving assembly drives the stirring assembly to rotate, the stirring assembly stirs the raw materials inside the stirring tank in a horizontal direction, and at the same time, the raw materials at the bottom of the inner side of the stirring tank are refluxed and dispersed at the top of the inner side of the stirring tank through the material distribution assembly, thereby realizing rapid mixing of the raw materials and improving stirring efficiency, after the stirring is completed, the raw materials are discharged through the discharge assembly, and are coated on a flexible graphite sheet after being deaerated.

[0007] Preferably, the stirring assembly includes a hollow shaft, a reciprocating screw, a cylinder, a liquid extraction tube, a liquid extraction check valve, a discharge tube, a discharge check valve and a piston assembly, wherein a hollow shaft is rotatably arranged at the top of the stirring tank, the top of the hollow shaft extends above the stirring tank, a reciprocating screw is arranged at the bottom of the hollow shaft, a cylinder is arranged at the bottom of the stirring tank, a liquid extraction tube is arranged at the input end of the cylinder, a liquid extraction check valve is arranged on the liquid extraction tube, a discharge tube is arranged at the output end of the cylinder, a discharge check valve is installed on the discharge tube, and the A piston assembly is provided on the reciprocating screw, and the output end of the discharge pipe is rotatably connected to the top end of the hollow shaft; when in use, the driving assembly drives the hollow shaft to rotate, so that the reciprocating screw drives the piston assembly to move back and forth up and down inside the cylinder. When the piston assembly moves upward in the cylinder, the raw materials inside the mixing tank enter the cylinder through the liquid suction tube. When the piston assembly moves downward in the cylinder, the piston assembly presses the raw materials inside the cylinder through the discharge pipe into the distribution assembly for secondary distribution, thereby improving the mixing efficiency.

[0008] Preferably, the material distributing component comprises a rotating joint, a spray pipe, an L-shaped guide pipe, a support rod and a stirring blade, the output end of the discharging pipe is connected to the top of the hollow rotating shaft through a rotating joint, the outer wall of the hollow rotating shaft is circumferentially provided with a spray pipe, the output end of each group of spray pipes is respectively connected to the side wall of a group of L-shaped guide pipes, the bottom end of each group of L-shaped guide pipes is respectively provided with a group of support rods, and each group of support rods is respectively installed with multiple groups of stirring blades; the raw materials at the bottom of the inner side of the stirring tank enter the interior of the hollow rotating shaft through the rotating joint, and the raw materials entering the interior of the hollow rotating shaft enter the L-shaped guide pipes respectively through the multiple groups of spray pipes, because the hollow rotating shaft drives the multiple groups of L-shaped guide pipes to rotate rapidly, so that the raw materials entering the interior of the L-shaped guide pipe are mixed with the raw materials in the upper and middle parts of the stirring tank for secondary mixing, and then are transported to the top of the interior of the stirring tank by the L-shaped guide pipe under the action of the inertia of the raw materials for mixing the upper and lower raw materials, thereby improving the mixing efficiency, and at the same time, the support rod rotates with the L-shaped guide pipe, so that the multiple groups of stirring blades mix and stir the raw materials again, thereby improving the stirring efficiency.

[0009] Preferably, the piston assembly includes a threaded connection block, a No. 1 connecting rod, a piston, a side plate and a smooth rod, the threaded connection block is threadedly connected to the reciprocating screw, a group of side plates are respectively arranged on both sides of the threaded connection block, each group of side plates is respectively slidably connected to a group of smooth rods, the bottom ends of the two groups of smooth rods are connected to the top end of the cylinder, two groups of No. 1 connecting rods are arranged at the bottom end of the threaded connection block, the bottom ends of the two groups of No. 1 connecting rods are connected to the top end of the piston, and the piston is slidingly sealed inside the cylinder; when the reciprocating screw rotates, the smooth rod limits the side plate in the horizontal direction, so that the reciprocating screw makes the No. 1 connecting rod drive the piston to reciprocate up and down, and when the piston rises inside the cylinder, the raw materials inside the mixing tank are drawn into the cylinder, and when the piston descends, the raw materials inside the cylinder are pressed into the hollow rotating shaft through the discharge pipe, thereby improving the mixing efficiency.

[0010] Preferably, the driving assembly includes a bracket, a driving motor, a No. 1 sprocket, a No. 2 sprocket, a chain and a rotating shaft. The driving motor is installed on the top of the stirring tank through the bracket. The output end of the driving motor is provided with a rotating shaft. The No. 2 sprocket is installed on the rotating shaft. The No. 1 sprocket is installed on the hollow rotating shaft. The No. 1 sprocket and the No. 2 sprocket are driven by a chain. The driving motor is started, so that the No. 2 sprocket drives the No. 1 sprocket to rotate through the chain, and the hollow rotating shaft is further rotated to improve the stirring efficiency.

[0011] Preferably, the discharge assembly includes a discharge pipe, a discharge valve, a sampling tube and a sampling valve. The output end of the mixing tank is provided with a discharge pipe, the discharge pipe is equipped with a discharge valve, the discharge pipe is equipped with a sampling tube, and the sampling tube is equipped with a sampling valve. When it is necessary to sample the raw materials, the sampling valve is opened to allow the sampling tube to perform a sampling operation. After the mixing is completed, the discharge valve is opened to allow the mixed raw materials to be discharged through the discharge pipe, thereby improving convenience.

[0012] Preferably, it also includes an inspection port, a sealing door, bolts and a handle. The mixing tank is provided with an inspection port, and the sealing door is used to seal the inspection port by means of a plurality of sets of bolts. The sealing door is provided with a handle. Under normal conditions, the sealing door seals the inspection port by means of bolts. When the inside of the mixing tank needs to be inspected, the bolts are loosened and the sealing door is moved by means of the handle, thereby improving convenience.

[0013] Preferably, it also includes a base and a reinforcement plate, wherein a group of bases are respectively installed at the bottom end of each group of legs, and multiple groups of reinforcement plates are arranged between the legs and the bases; the legs and the base are reinforced by the reinforcement plates to improve the firmness of the connection.

[0014] Preferably, the stirring blade is made of stainless steel.

[0015] A method for producing an accordion-type graphene thermally conductive film of the present invention comprises the following steps: Step 1: Disperse graphite oxide paste in water to prepare a graphite oxide suspension with a concentration of at least 50 g / L, add protonic acid to adjust the pH to 2-4, add a carbon source precursor to the graphite oxide suspension, and inject the above raw materials into a stirring tank through a feed pipe; Step 2: Start the driving motor to make the hollow shaft rotate quickly; Step 3: The reciprocating screw drives the threaded connection block to reciprocate up and down, so that the raw materials at the bottom of the inner side of the mixing tank enter the cylinder and enter the hollow shaft through the discharge pipe; Step 4: The raw materials entering the hollow shaft enter the L-shaped guide pipe through the liquid spray pipe and are mixed with the raw materials on the top of the inner side of the mixing tank for a second time, and then are transported to the top of the inner side of the mixing tank under the action of their own inertia; Step 5: After the mixing and stirring is completed, the mixture is drained and degassed before being coated on a flexible graphite sheet; Step 6: Preform the flexible graphite sheet into an accordion-like shape by rolling the equipment, and then unfold it into a folding fan; Step 7: Composite pre-pressing, natural graphitization during use in ultra-high temperature environment.

[0016] Compared with the prior art, the present invention has the following beneficial effects: when in use, the raw materials are injected into the stirring tank through the feed pipe, the driving component is started, the driving component drives the stirring component to rotate, the stirring component stirs the raw materials in the stirring tank in a horizontal direction, and at the same time, the raw materials at the bottom of the stirring tank are refluxed and dispersed at the top of the inner side of the stirring tank through the material distribution component, thereby achieving rapid mixing of the raw materials and improving the stirring efficiency. After the stirring is completed, the raw materials are discharged through the discharge component, and are coated on the flexible graphite sheet after degassing treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1is a first isometric structural schematic diagram of the present invention; Figure 2 is a second isometric structural schematic diagram of the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the exploded structure of the drive motor and the mixing tank; Figure 5 It is an enlarged structural diagram of the mixing tank, discharge pipe and other structures; Figure 6 It is an enlarged structural diagram of the No. 1 sprocket and support rod and other structures; Figure 7 It is a schematic diagram of the exploded structure of the discharge pipe and drive motor; Figure 8 It is an enlarged structural schematic diagram of structures such as a threaded connection block and a liquid extraction pipe; Fig. 9 It is an enlarged structural schematic diagram of the structure including the bracket and the L-shaped flow guide pipe; Fig.10 It is an enlarged structural schematic diagram of the L-shaped guide tube and stirring blade; Fig.11 It is a schematic block diagram of the production method of the present invention.

[0018] Markings in the attached drawings: 101, stirring tank; 102, supporting leg; 103, feeding pipe; 104, liquid level meter; 105, base; 106, reinforcing plate; 201, hollow shaft; 202, reciprocating screw; 203, cylinder; 204, pumping pipe; 205, pumping check valve; 206, discharge pipe; 207, discharge check valve; 301, rotary joint; 302, spray pipe; 303, L-shaped guide pipe; 304, supporting rod; 305, stirring plate; 401, threaded connection block; 402, No. 1 connecting rod; 403, piston; 404, side plate; 405, bare rod; 501, bracket; 502, driving motor; 503, sprocket No. 1; 504, sprocket No. 2; 505, chain; 506, rotating shaft; 601, discharge pipe; 602, discharge valve; 603, sampling tube; 604, sampling valve; 701, inspection port; 702, sealing door; 703, bolt; 704, handle. DETAILED DESCRIPTION

[0019] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] Example 1 like Figures 1 to 10 As shown, an accordion-type graphene thermal conductive film production line of the present invention comprises a stirring tank 101, legs 102, a feed pipe 103 and a liquid level meter 104, wherein the bottom of the stirring tank 101 is provided with multiple groups of legs 102, the top of the stirring tank 101 is provided with a feed pipe 103, the stirring tank 101 is provided with a liquid level meter 104, and further comprises a stirring component, a material distribution component, a driving component and a material discharge component, wherein a stirring component is provided inside the stirring tank 101, a driving component is provided at the top of the stirring tank 101, the driving component provides driving force for the stirring component, the material distribution component is installed on a hollow rotating shaft 201, and the material distribution component is used to re-distribute the raw materials at the bottom of the stirring tank 101 on the upper part of the stirring tank 101; The stirring assembly includes a hollow shaft 201, a reciprocating screw 202, a cylinder 203, a liquid extraction pipe 204, a liquid extraction check valve 205, a discharge pipe 206, a discharge check valve 207 and a piston assembly. The top of the stirring tank 101 is rotatably provided with a hollow shaft 201, the top of the hollow shaft 201 extends above the stirring tank 101, the bottom of the hollow shaft 201 is provided with a reciprocating screw 202, the bottom of the stirring tank 101 is provided with a cylinder 203, the input end of the cylinder 203 is provided with a liquid extraction pipe 204, the liquid extraction check valve 205 is provided on the liquid extraction pipe 204, the output end of the cylinder 203 is provided with a discharge pipe 206, the discharge pipe 206 is installed with a discharge check valve 207, the reciprocating screw 202 is provided with a piston assembly, and the output end of the discharge pipe 206 is rotatably connected with the top of the hollow shaft 201; The material distribution assembly includes a rotary joint 301, a liquid spraying pipe 302, an L-shaped flow guide pipe 303, a support rod 304 and a stirring blade 305. The output end of the discharge pipe 206 is connected to the top of the hollow shaft 201 through the rotary joint 301. The outer wall of the hollow shaft 201 is circumferentially provided with a liquid spraying pipe 302. The output end of each group of liquid spraying pipes 302 is respectively connected to the side wall of a group of L-shaped flow guide pipes 303. The bottom end of each group of L-shaped flow guide pipes 303 is respectively provided with a group of support rods 304, and each group of support rods 304 is respectively installed with a plurality of stirring blades 305. The piston assembly includes a threaded connection block 401, a No. 1 connecting rod 402, a piston 403, a side plate 404 and a polished rod 405. The threaded connection block 401 is threadedly connected to the reciprocating screw 202. A group of side plates 404 are respectively arranged on both sides of the threaded connection block 401. Each group of side plates 404 is respectively slidably connected to a group of polished rods 405. The bottom ends of the two groups of polished rods 405 are connected to the top of the cylinder 203. Two groups of No. 1 connecting rods 402 are arranged at the bottom end of the threaded connection block 401. The bottom ends of the two groups of No. 1 connecting rods 402 are connected to the top of the piston 403. The piston 403 is slidably sealed inside the cylinder 203. The driving assembly includes a bracket 501, a driving motor 502, a first sprocket 503, a second sprocket 504, a chain 505 and a rotating shaft 506. The driving motor 502 is installed at the top of the mixing tank 101 through the bracket 501. The output end of the driving motor 502 is provided with a rotating shaft 506, and the second sprocket 504 is installed on the rotating shaft 506. The first sprocket 503 is installed on the hollow rotating shaft 201, and the first sprocket 503 and the second sprocket 504 are driven by the chain 505. The discharge assembly includes a discharge pipe 601, a discharge valve 602, a sampling pipe 603 and a sampling valve 604. The output end of the mixing tank 101 is provided with a discharge pipe 601, a discharge valve 602 is installed on the discharge pipe 601, a sampling pipe 603 is installed on the discharge pipe 601, and a sampling valve 604 is installed on the sampling pipe 603; It also includes an inspection port 701, a sealing door 702, bolts 703 and a handle 704. The inspection port 701 is installed on the mixing tank 101, and the sealing door 702 seals the inspection port 701 through multiple groups of bolts 703. The sealing door 702 is installed with a handle 704; It also includes a base 105 and a reinforcing plate 106. A group of bases 105 are respectively installed at the bottom end of each group of legs 102, and multiple groups of reinforcing plates 106 are arranged between the legs 102 and the base 105; The stirring blade 305 is made of stainless steel.

[0021] In this embodiment, when in use, the raw material is injected into the mixing tank 101 through the feed pipe 103, and the drive motor 502 is started, so that the second sprocket 504 drives the first sprocket 503 to rotate through the chain 505, and further rotates the hollow shaft 201, the reciprocating screw 202 rotates, and the light rod 405 limits the side plate 404 in the horizontal direction, so that the reciprocating screw 202 causes the first connecting rod 402 to drive the piston 403 to move up and down. When the piston 403 rises inside the cylinder 203, the raw material inside the mixing tank 101 is drawn into the cylinder 203. When the piston 403 descends, the raw material inside the cylinder 203 is pressed into the hollow shaft 201 through the discharge pipe 206. The raw material entering the hollow shaft 201 enters the L-shaped guide pipe 303 respectively through multiple groups of spray pipes 302. Since the hollow shaft 201 drives multiple groups of L-shaped guide pipes 3 03 is rotated rapidly, so that the raw materials entering the L-shaped guide tube 303 are mixed with the raw materials in the upper part of the stirring tank 101 for a second time, and then are transported to the top of the stirring tank 101 by the L-shaped guide tube 303 under the action of the inertia of the raw materials to mix the upper and lower raw materials, thereby improving the mixing efficiency. At the same time, the support rod 304 rotates with the L-shaped guide tube 303, so that the multiple groups of stirring blades 305 mix and stir the raw materials again. When it is necessary to sample the raw materials, the sampling valve 604 is opened, so that the sampling tube 603 performs the sampling operation. After the stirring is completed, the discharge valve 602 is opened, so that the stirred raw materials are discharged through the discharge pipe 601. Under normal conditions, the sealing door 702 seals the inspection port 701 through the bolt 703. When it is necessary to inspect the inside of the stirring tank 101, the bolt 702 is loosened and the sealing door 702 is moved by the handle 704.

[0022] Example 2 like Figures 1 to 11 As shown, a method for producing an accordion-type graphene thermal conductive film of the present invention comprises the following steps: Step 1: Disperse graphite oxide paste in water to prepare a graphite oxide suspension with a concentration of at least 50 g / L, add protonic acid to adjust the pH to 2-4, add a carbon source precursor to the graphite oxide suspension, and inject the above raw materials into the stirring tank 101 through the feed pipe 103; Step 2: Start the driving motor 502 to make the hollow shaft 201 rotate rapidly; Step 3: The reciprocating screw 202 drives the threaded connection block 401 to reciprocate up and down, so that the raw materials at the bottom of the inner side of the mixing tank 101 enter the cylinder 203 and enter the hollow shaft 201 through the discharge pipe 206; Step 4: The raw materials entering the hollow rotating shaft 201 enter the L-shaped guide pipe 303 through the liquid spray pipe 302 and are mixed with the raw materials on the inner top of the mixing tank 101 for a second time, and then are transported to the inner top of the mixing tank 101 under the action of their own inertia; Step 5: After the mixing and stirring is completed, the mixture is drained and degassed before being coated on a flexible graphite sheet; Step 6: Preform the flexible graphite sheet into an accordion-like shape by rolling the equipment, and then unfold it into a folding fan; Step 7: Composite pre-pressing, natural graphitization during use in ultra-high temperature environment.

[0023] The main functions achieved by the present invention are: 1. The support 501 drives the hollow shaft 201 to rotate, so that the piston 403 moves up and down inside the cylinder 203; 2. The raw materials at the bottom of the mixing tank 101 are transported to the inner chamber of the hollow rotating shaft 201, and are mixed with the raw materials again through the liquid spray pipe 302 and the L-shaped guide pipe 303, while moving upward by its own inertia.

[0024] The liquid extraction check valve 205, the material discharge check valve 207, the rotary joint 301 and the drive motor 502 of the accordion-type graphene thermal conductive film production line and production method of the present invention are purchased on the market. The technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for the technicians in this field to make creative efforts.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An accordion-type graphene thermal conductive film production line, comprising a stirring tank (101), legs (102), a feed pipe (103) and a liquid level meter (104), wherein a plurality of groups of legs (102) are arranged at the bottom of the stirring tank (101), a feed pipe (103) is installed at the top of the stirring tank (101), and a liquid level meter (104) is installed on the stirring tank (101), characterized in that: It also comprises a stirring assembly, a material distribution assembly, a driving assembly and a material discharge assembly. The stirring tank (101) is provided with a stirring assembly inside. The top of the stirring tank (101) is provided with a driving assembly, the driving assembly provides driving force for the stirring assembly. The material distribution assembly is installed on a hollow rotating shaft (201). The material distribution assembly is used to redistribute the raw materials at the bottom of the stirring tank (101) to the upper part of the stirring tank (101).

2. The accordion-type graphene thermal conductive film production line according to claim 1, characterized in that: The stirring assembly comprises a hollow rotating shaft (201), a reciprocating screw (202), a barrel (203), a liquid extraction pipe (204), a liquid extraction check valve (205), a material discharge pipe (206), a material discharge check valve (207) and a piston assembly. The top end of the stirring tank (101) is rotatably provided with a hollow rotating shaft (201), the top end of the hollow rotating shaft (201) extends above the stirring tank (101), the bottom end of the hollow rotating shaft (201) is provided with a reciprocating screw (202), and the stirring A cylinder (203) is provided at the bottom end of the mixing tank (101); a liquid extraction pipe (204) is provided at the input end of the cylinder (203); a liquid extraction check valve (205) is provided on the liquid extraction pipe (204); a discharge pipe (206) is provided at the output end of the cylinder (203); a discharge check valve (207) is installed on the discharge pipe (206); a piston assembly is provided on the reciprocating screw (202); and the output end of the discharge pipe (206) is rotatably connected to the top end of the hollow rotating shaft (201).

3. The accordion-type graphene thermal conductive film production line according to claim 2, characterized in that: The material distribution assembly comprises a rotary joint (301), a liquid spraying pipe (302), an L-shaped flow guide pipe (303), a support rod (304) and a stirring blade (305); the output end of the discharge pipe (206) is connected to the top end of the hollow rotating shaft (201) through the rotary joint (301); the outer wall of the hollow rotating shaft (201) is circumferentially provided with a liquid spraying pipe (302); the output end of each group of liquid spraying pipes (302) is respectively connected to the side wall of a group of L-shaped flow guide pipes (303); the bottom end of each group of L-shaped flow guide pipes (303) is respectively provided with a group of support rods (304); and each group of support rods (304) is respectively mounted with a plurality of groups of stirring blades (305).

4. The accordion-type graphene thermal conductive film production line according to claim 2, characterized in that: The piston assembly comprises a threaded connection block (401), a No. 1 connecting rod (402), a piston (403), a side plate (404) and a polished rod (405); the threaded connection block (401) is threadedly connected to the reciprocating screw (202); a group of side plates (404) are respectively arranged on both sides of the threaded connection block (401); each group of side plates (404) is respectively slidably connected to a group of polished rods (405); the bottom ends of the two groups of polished rods (405) are connected to the top end of the cylinder (203); two groups of No. 1 connecting rods (402) are arranged at the bottom end of the threaded connection block (401); the bottom ends of the two groups of No. 1 connecting rods (402) are respectively connected to the top end of the piston (403); and the piston (403) is slidably sealed inside the cylinder (203).

5. The accordion-type graphene thermal conductive film production line according to claim 2, characterized in that: The driving assembly comprises a bracket (501), a driving motor (502), a first sprocket (503), a second sprocket (504), a chain (505) and a rotating shaft (506); the driving motor (502) is mounted on the top of the stirring tank (101) via the bracket (501); a rotating shaft (506) is arranged at the output end of the driving motor (502); a second sprocket (504) is mounted on the rotating shaft (506); a first sprocket (503) is mounted on the hollow rotating shaft (201); and the first sprocket (503) and the second sprocket (504) are driven by the chain (505).

6. The accordion-type graphene thermal conductive film production line according to claim 1, characterized in that: The discharge assembly comprises a discharge pipe (601), a discharge valve (602), a sampling pipe (603) and a sampling valve (604); the output end of the stirring tank (101) is provided with a discharge pipe (601); the discharge valve (602) is installed on the discharge pipe (601); the sampling pipe (603) is installed on the discharge pipe (601); and the sampling valve (604) is installed on the sampling pipe (603).

7. The accordion-type graphene thermal conductive film production line according to claim 1, characterized in that: It also comprises an inspection port (701), a sealing door (702), bolts (703) and a handle (704); the inspection port (701) is installed on the mixing tank (101); the sealing door (702) seals the inspection port (701) via a plurality of sets of bolts (703); and the sealing door (702) is installed with a handle (704).

8. The accordion-type graphene thermal conductive film production line according to claim 1, characterized in that: It also includes a base (105) and a reinforcing plate (106), wherein a group of bases (105) are respectively installed at the bottom end of each group of supporting legs (102), and multiple groups of reinforcing plates (106) are arranged between the supporting legs (102) and the base (105).

9. The accordion-type graphene thermal conductive film production line according to claim 3, characterized in that: The stirring blade (305) is made of stainless steel.

10. A method for producing an accordion-type graphene thermally conductive film, characterized in that: The following steps are involved: Step 1: dispersing graphite oxide paste in water to prepare a graphite oxide suspension having a concentration of at least 50 g / L, adding protonic acid to adjust the pH to 2-4, adding a carbon source precursor to the graphite oxide suspension, and injecting the above raw materials into the stirring tank (101) through a feed pipe (103); Step 2: starting the driving motor (502) to make the hollow rotating shaft (201) rotate rapidly; Step 3: The reciprocating screw (202) drives the threaded connection block (401) to reciprocate up and down, so that the raw materials at the bottom of the inner side of the mixing tank (101) enter the cylinder (203) and enter the hollow shaft (201) through the discharge pipe (206); Step 4: the raw materials entering the hollow rotating shaft (201) enter the L-shaped guide pipe (303) through the liquid spray pipe (302) and are mixed with the raw materials on the inner top of the stirring tank (101) for a second time before being transported to the inner top of the stirring tank (101) under the action of their own inertia; Step 5: After the mixing and stirring is completed, the mixture is drained and degassed before being coated on a flexible graphite sheet; Step 6: Preform the flexible graphite sheet into an accordion-like shape by rolling the equipment, and then unfold it into a folding fan; Step 7: Composite pre-pressing, natural graphitization during use in ultra-high temperature environment.

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