Device and method for preparing graphene through continuous rolling tar flash evaporation Joule heat

Abstract

The invention relates to the technical field of graphene preparation devices, and discloses a device and method for preparing graphene through continuous rolling tar flash Joule heat, the device comprises a base, the upper surface of the base is sequentially provided with a first bearing support, a second bearing support, a reaction cavity, a cooling cavity, a third bearing support and a fourth bearing support; a control box is arranged on the side face of the base. According to the device and method for preparing graphene through continuous rolling tar flash evaporation Joule heat, the positions of the first pressing roller and the second pressing roller can be accurately adjusted through the first adjusting mechanism, the rolling pressure and the rolling gap on a base material can be flexibly controlled, effective plugging can be formed from the side face through the relative positions of the first pressing roller and the second pressing roller, and the graphene preparation efficiency is improved. According to the technical scheme, tar is prevented from overflowing towards the two sides in the rolling process, raw material waste and equipment pollution are reduced, meanwhile, tar in a base material can be evenly distributed through even rolling pressure, it is ensured that raw materials are distributed consistently in the follow-up Joule thermal reaction, and the problem that local reaction is excessive or insufficient is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of graphene preparation device, in particular to a device and method for preparing graphene by continuous roll pressing of tar flash evaporation Joule heat. BACKGROUND

[0002] As a new type of carbon material with excellent physical and chemical properties, graphene has broad application prospects in electronic devices, energy storage, composite materials and many other fields.

[0003] At present, the technology of preparing graphene from carbonaceous raw materials such as tar is gradually attracting attention. Tar, as a byproduct of industrial production, is widely available and low in cost. Converting it into high-value graphene not only realizes efficient use of resources, but also reduces the cost of graphene preparation. In the prior art, there are related devices and methods for preparing graphene from tar by pyrolysis, chemical exfoliation and other methods.

[0004] However, these existing devices and methods have many shortcomings in actual application: some devices use batch production mode, i.e. only a certain amount of raw materials can be processed at a time, and the machine needs to be stopped for raw material replacement and equipment cleaning after completing a batch of production, resulting in low production efficiency and difficulty in meeting the needs of industrial large-scale production; during the raw material pretreatment stage, the coating and distribution of tar in the substrate are not accurate enough, and tar is prone to uneven distribution, which may lead to excessive or insufficient local reaction in the subsequent reaction process and affect the quality stability of graphene products; at the same time, tar is prone to overflow to both sides during the treatment process, causing waste of raw materials and pollution of equipment.

[0005] Therefore, it is necessary to provide a device and method for preparing graphene by continuous roll pressing of tar flash evaporation Joule heat. SUMMARY

[0006] In view of the shortcomings of the prior art, the present application provides a device and method for preparing graphene by continuous roll pressing of tar flash evaporation Joule heat, which has the advantages of continuous production and uniform distribution of raw materials, and solves the problems raised in the background art.

[0007] The present application provides the following technical solution: a device and method for preparing graphene by continuous roll pressing of tar flash evaporation Joule heat, comprising a base:

[0008] The upper surface of the base is sequentially provided with a bearing bracket one, a bearing bracket two, a reaction cavity, a cooling cavity, a bearing bracket three and a bearing bracket four, and the side surface of the base is provided with a control box;

[0009] The bearing support one is rotationally connected with a pay-off roller, the side of the bearing support one is provided with a mounting mechanism, the pay-off roller is mounted on the bearing support one through the mounting mechanism, the bearing support two is a special Y-shaped structure, the first supporting end of the bearing support two is rotationally connected with a compression roller one, the second supporting end of the bearing support two is rotationally connected with a compression roller two, the side of the bearing support two is provided with an adjusting mechanism one, the compression roller one and the compression roller two are mounted on the bearing support two through the adjusting mechanism one, the inside of the reaction cavity is rotationally connected with a joule heat roller, the inside of the reaction cavity is provided with an adjusting mechanism two, the joule heat roller is mounted in the inside of the reaction cavity through the adjusting mechanism two, the inside of the cooling cavity is provided with a cooling mechanism, the bearing support three is rotationally connected with two groups of auxiliary rollers, the bearing support four is rotationally connected with a winding roller, the side of the bearing support four is provided with a mounting mechanism, the winding roller is mounted on the bearing support four through the mounting mechanism.

[0010] Preferably, the adjusting mechanism one comprises a bearing block, a through slot is formed in the middle of the bearing block, a bidirectional screw rod two is rotationally connected in the through slot, connecting supports are threadedly connected to the outer surfaces of the two ends of the bidirectional screw rod two, the inside of the supporting end of the connecting support is rotationally connected with the outer surface of the end of the compression roller one, a supporting arm is fixedly connected to the outer surface of the supporting end of the connecting support, the other end of the supporting arm is rotationally connected with the outer surface of the end of the compression roller two.

[0011] Preferably, the cooling mechanism comprises oppositely arranged liquid inlet blocks, a circulation chamber is arranged in the inside of the liquid inlet block, cooling plates are mounted on the opposite sides of the liquid inlet block, two groups of connecting pipes are communicated with the inside of the circulation chamber, the other ends of the connecting pipes are communicated with telescopic pipes, the other ends of the telescopic pipes extend out of the cooling cavity.

[0012] Preferably, connecting arms are fixedly mounted on the two sides of the liquid inlet block, a fixed column is fixedly mounted in the inside of the cooling cavity, the outer surface of the fixed column is slidingly connected with the inside of the first connecting arm, an adjusting mechanism two is arranged on the inner side wall of the cooling cavity, the adjusting mechanism two comprises a side block, a bidirectional screw rod three is rotationally connected in the inside of the side block, moving blocks are threadedly connected to the outer surfaces of the two ends of the bidirectional screw rod three, the side edges of the moving blocks are fixedly mounted with the side edges of the second connecting arms, an adjusting gear is fixedly mounted at the end of the bidirectional screw rod three, the outer surface of the adjusting gear is engaged with a U-shaped limiting clamp, the two feet of the U-shaped limiting clamp are inserted into the upper surface of the side block.

[0013] Preferably, the inner bottom of the reaction cavity is fixedly provided with a bottom block on both sides, a double screw rod one is rotatably arranged on the upper surface of the bottom block, threaded blocks are connected to the outer surfaces of the two ends of the double screw rod one, an adjusting mechanism two is arranged on the top of the threaded blocks, and the two ends of the joule heat roller are provided with mounting racks, and the side surfaces of the mounting racks are fixedly provided with the moving blocks of the adjusting mechanism two.

[0014] Preferably, the upper surface of the reaction cavity is provided with a top cover through bolts, the top cover is provided with a ventilation pipe in communication, a temperature sensing structure is arranged on the inner side surface of the top cover, and the upper surface of the cooling cavity is provided with a top cover through bolts.

[0015] Preferably, the mounting mechanism on the bearing support one comprises two bearing plates, the side surfaces of the bearing plates are fixedly provided with the side surfaces of the bearing support one, sliding blocks are slidably arranged on the upper surfaces of the bearing plates, a bearing seat one is fixedly arranged on the upper surface of the first sliding block, a bearing rod is rotatably arranged in the top end of the bearing seat one, a cross positioning block is fixedly arranged on the end of the bearing rod, a bearing seat two is fixedly arranged on the upper surface of the second sliding block, a driving device is arranged on the top end of the bearing seat two, a cross positioning block is fixedly arranged on the output end of the driving device, the end of the unwinding roller is insertedly connected with the outer surface of the cross positioning block, the side surfaces of the bearing plates included in the mounting mechanism on the bearing support four are fixedly provided with the side surfaces of the bearing support four, the outer surfaces of the cross positioning blocks included in the mounting mechanism are insertedly connected with the ends of the winding rollers, and the fixed pins are threadedly connected at the coinciding positions of the sliding blocks and the bearing plates.

[0016] Preferably, wire harness holes are formed in the two sides of the reaction cavity, a motor is arranged on the side surface and bottom of the reaction cavity, and the output shaft of the motor is drivingly connected with the end of the double screw rod one through a linkage shaft.

[0017] Preferably, a motor is arranged on the lower surface of the bearing block, and the output shaft of the motor is drivingly connected with the end of the through groove through a linkage shaft.

[0018] A method for preparing graphene by continuous roller pressing of tar flash joule heat, comprising the following steps:

[0019] Step one: loading the substrate through the mounting mechanisms on the bearing support one and the bearing support four, loosening the fixed pins on the sliding blocks, aligning the cross grooves at the two ends of the unwinding roller with the cross positioning blocks, inserting the cross positioning blocks, pushing the sliding blocks to stably fix the substrate coil, and then tightening the fixed pins; and the winding roller is mounted on the bearing support four in the same way.

[0020] Step two: the free end of the substrate on the unwinding roller is guided out, sequentially passes through the roller pressing channel formed by the pressing roller one and the pressing roller two on the bearing support two, the cooling channel between the cooling plate in the cooling cavity and the Joule heat roller in the reaction cavity, and finally is fixed on the winding roller after being guided by the two groups of auxiliary rollers on the bearing support three, the auxiliary rollers ensure the stability of the substrate tension through the rubber material surface;

[0021] Step three: the motor at the bottom of the side of the reaction cavity drives the bidirectional screw rod one on the bottom block to rotate, synchronously moves the receiving block at both ends, cooperates with the adjusting mechanism two at the top of the receiving block, moves the mounting frame through the bidirectional screw rod three, and finally adjusts the Joule heat roller to the best position of being attached to the substrate, and after the adjustment is completed, the U-shaped limiting clamp engages the adjusting gear to realize locking;

[0022] The inert gas is introduced through the air pipe on the top cover of the reaction cavity to exclude the air in the cavity to form a protective atmosphere, and then the top cover is closed and sealed through the bolts;

[0023] The internal electric heating element of the Joule heat roller is started, the temperature sensing structure in the inside of the top cover monitors the temperature in the cavity in real time and feeds back to the control box, so that the temperature is stably kept in the set best reaction range, the substrate contacts the Joule heat roller in the conveying process, the tar in the middle of the substrate is flash decomposed under the Joule heat to generate a graphene structure;

[0024] Step four: according to the cooling requirement of the substrate after the reaction, the position of the liquid inlet block in the cooling cavity is adjusted through the adjusting mechanism two, the moving block is driven by the connecting arm to slide along the fixed column through the bidirectional screw rod three, until the cooling plate keeps a proper distance from the substrate, and after the adjustment, the U-shaped limiting clamp is fixed, the external refrigeration circulating system transports the cooling liquid to the circulating chamber of the liquid inlet block through the telescopic pipe and the connecting pipe, the cooling liquid flows in the chamber and exchanges heat with the substrate after the reaction through the cooling plate with high heat conductivity, so that the temperature of the substrate is rapidly reduced, the graphene structure is shaped, and structure defects caused by too high temperature are prevented;

[0025] Step five: the driving device of the mounting mechanism on the bearing support four is started, the winding roller is driven to rotate through the cross positioning block, and the cooled and shaped graphene substrate is uniformly wound by cooperating with the synchronous unwinding of the unwinding roller, so that the whole continuous preparation process is completed.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1. The continuous roll pressing tar flash Joule heat graphene preparation device and method, the adjusting mechanism one can accurately adjust the position of the pressing roller one and the pressing roller two, not only can flexibly control the roll pressure degree and the roll gap of the substrate, but also can form effective block from the side by the relative position of the two, prevent the tar from overflowing to both sides during the roll pressing process, reduce the waste of raw materials and equipment pollution, at the same time, through the uniform roll pressure degree, the tar in the substrate can be evenly distributed, ensure that the raw materials are evenly distributed during the subsequent Joule heat reaction, avoid the problem of excessive or insufficient local reaction, the Joule heat roller in the reaction chamber is installed through the adjusting mechanism two, which can accurately adjust the position and height of the Joule heat roller according to the actual demand, ensure the stable contact state between the substrate and the Joule heat roller, at the same time, the temperature sensing structure on the top cover can monitor the temperature in the reaction chamber in real time, combined with the control box, the heating process can be accurately controlled, ensure that the Joule heat reaction is carried out in the best temperature range set, which is beneficial to generate stable structure and excellent performance of graphene, the liquid inlet block in the cooling mechanism realizes position adjustment through the adjusting mechanism two, which can flexibly change the relative position of the cooling plate and the substrate, and then control the cooling rate and cooling uniformity, avoid the structure defects or performance fluctuations of graphene caused by improper cooling, and ensure the stability of product quality.

[0028] 2. The continuous roll pressing tar flash Joule heat graphene preparation device and method, through the cooperation of the unwinding roller, the pressing roller group, the Joule heat roller, the cooling mechanism and the winding roller, a complete continuous production process is constructed, from the unwinding of the raw material substrate, to the roll pressing, Joule heat reaction, cooling and shaping, and finally to the final winding, the whole process does not need to be interrupted, realizing the continuous operation of graphene preparation, this continuous production mode greatly reduces the time loss of frequent start-stop, raw material replacement and other links in traditional batch production, significantly improves the graphene output per unit time, improves the production efficiency, and is more suitable for industrial large-scale production demand.

[0029] 3. The continuous roll pressing tar flash Joule heat graphene preparation device and method, the unwinding roller and the winding roller are installed on the bearing support one and the bearing support four through the mounting mechanism, the sliding block, the bearing seat one, the bearing seat two and the cross positioning block in the mounting mechanism are designed, so that the mounting and dismounting process of the unwinding roller and the winding roller is simple and fast, and the replacement of the substrate and the daily maintenance of the equipment are convenient, the adjusting mechanism one and the adjusting mechanism two adopt screw rod transmission and other ways, the adjusting process is stable and reliable, and the operation is convenient, the staff can realize the accurate adjustment of the position, gap and other parameters of each roller through simple operations such as rotating the screw rod or adjusting the gear, which reduces the operation difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0031] Figure 1 It is a schematic diagram of the overall structure of the device of the present application.

[0032] Figure 2 It is a schematic diagram of part of the installation mechanism of the present application.

[0033] Figure 3 It is a schematic diagram of another part of the installation mechanism of the present application.

[0034] Figure 4 It is a schematic diagram of a structure of the adjustment mechanism of the present application.

[0035] Figure 5 It is a schematic diagram of part of the structure of the present application.

[0036] Figure 6 It is a schematic diagram of the internal structure of the reaction cavity of the present application.

[0037] Figure 7 It is a schematic diagram of another structure of the adjustment mechanism of the present application.

[0038] Figure 8 It is a schematic diagram of the side structure of the cooling cavity of the present application.

[0039] Figure 9 It is a schematic diagram of the internal structure of the cooling cavity of the present application.

[0040] Figure 10 It is a schematic diagram of the internal structure of the liquid inlet block of the present application.

[0041] Figure 11 It is a schematic diagram of the control flow of the present application.

[0042] In the drawings, the components represented by each reference numeral are listed as follows:

[0043] 1, base;

[0044] 2, bearing bracket one; 210, unwinding roller;

[0045] 3, bearing bracket two; 310, compression roller one; 320, compression roller two;

[0046] 4, reaction cavity; 410, air pipe; 420, wire harness hole; 430, bottom block; 431, bidirectional screw one; 432, receiving block; 440, joule heat roller; 441, mounting bracket; 450, temperature sensing structure;

[0047] 5. Control box;

[0048] 6. Cooling cavity; 610. Telescopic pipe; 611. Connecting pipe; 620. Liquid inlet block; 621. Connecting arm; 622. Circulation chamber; 623. Cooling plate; 630. Fixing column;

[0049] 7. Bearing support three; 710. Auxiliary roller;

[0050] 8. Bearing support four; 810. Winding roller;

[0051] 9. Mounting mechanism; 910. Bearing plate; 920. Sliding block; 930. Bearing seat one; 931. Bearing rod; 932. Cross positioning block; 940. Driving device; 950. Fixing bolt; 960. Bearing seat two;

[0052] 10. Adjusting mechanism one; 101. Bearing block; 102. Through slot; 103. Bidirectional screw rod two; 104. Connecting support; 105. Branch arm;

[0053] 11. Adjusting mechanism two; 111. Side block; 112. Bidirectional screw rod three; 113. Moving block; 114. Adjusting gear; 115. U-shaped limiting clamp. DETAILED DESCRIPTION

[0054] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0055] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 , a continuous roller pressing tar flash evaporation joule heat graphene preparation device and method, including base 1:

[0056] The upper surface of the base 1 is sequentially provided with bearing support one 2, bearing support two 3, reaction cavity 4, cooling cavity 6, bearing support three 7 and bearing support four 8, and the side of the base 1 is provided with control box 5;

[0057] The control box 5 is internally provided with a PLC control system, a power module, a relay and various control buttons, which are used to overall control the operating parameters of the mechanisms of the device, such as the key indicators of unwinding / winding speed, reaction temperature, roller pressing gap, etc., and to display the equipment operating state in real time;

[0058] The bearing support one 2 is rotationally fitted with a pay-off roller 210, and the side of the bearing support one 2 is provided with a mounting mechanism 9, and the pay-off roller 210 is mounted on the bearing support one 2 through the mounting mechanism 9, the bearing support two 3 is a special-shaped Y structure, the first supporting end of the bearing support two 3 is rotationally fitted with a compression roller one 310, the second supporting end of the bearing support two 3 is rotationally fitted with a compression roller two 320, and the side of the bearing support two 3 is provided with an adjusting mechanism one 10, and the compression roller one 310 and the compression roller two 320 are mounted on the bearing support two 3 through the adjusting mechanism one 10, the inside of the reaction cavity 4 is rotationally fitted with a Joule heat roller 440, the inside of the reaction cavity 4 is provided with an adjusting mechanism two 11, and the Joule heat roller 440 is mounted in the inside of the reaction cavity 4 through the adjusting mechanism two 11, the inside of the cooling cavity 6 is provided with a cooling mechanism, two groups of auxiliary rollers 710 are rotationally fitted on the bearing support three 7, and a winding roller 810 is rotationally fitted on the bearing support four 8, and the side of the bearing support four 8 is provided with a mounting mechanism 9, and the winding roller 810 is mounted on the bearing support four 8 through the mounting mechanism 9;

[0059] The bearing support one 2 is rotationally fitted with a pay-off roller 210 through a bearing, and the pay-off roller 210 is used for loading a base material coil to be processed, the side of the bearing support one 2 is symmetrically provided with two groups of mounting mechanisms 9, and the pay-off roller 210 is detachably mounted on the bearing support one 2 through the mounting mechanisms 9, facilitating replacement of the coil, the bearing support two 3 adopts a special-shaped Y type welded structure, a first supporting end of the bearing support two 3 is rotationally fitted with a compression roller one 310 through a bearing, the compression roller one 310 is provided with eight and is symmetrically distributed, a second supporting end is rotationally fitted with a compression roller two 320 through a bearing, the compression roller two 320 is provided with two groups and is symmetrically distributed to form a roller pressing channel, and the side of the bearing support two 3 is fixedly provided with an adjusting mechanism one 10, and the compression roller one 310 and the compression roller two 320 are adjustably mounted through the adjusting mechanism one 10, ensuring that the roller pressing parameters can be accurately controlled.

[0060] The reaction cavity 4 is a core reaction area, and a Joule heat roller 440 is rotationally fitted in the inside of the reaction cavity 4 through a bearing, the Joule heat roller 440 is internally integrated with an electric heating element, a specific electric heating element is a red copper electrode, and the Joule heat roller is provided with four groups, two by two symmetrically arranged, wherein the upper one is a positive electrode and the lower one is a negative electrode, which can be quickly heated to the required temperature of the process, and the inside of the reaction cavity 4 is provided with an adjusting mechanism two 11 on both sides, and the Joule heat roller 440 is adjusted in height and horizontal position through the adjusting mechanism two 11, to ensure the fitting accuracy with the base material, the inside of the cooling cavity 6 is provided with symmetrically distributed cooling mechanisms for rapid cooling and shaping of the reacted base material, two groups of auxiliary rollers 710 are rotationally fitted on the bearing support three 7, the auxiliary rollers 710 are made of rubber material and play a role in guiding and tensioning the base material, and a winding roller 810 is rotationally fitted on the bearing support four 8, and the winding roller 810 is detachably mounted through the mounting mechanism 9 on the side, for winding the processed graphene base material.

[0061] As shown in Figure 1 and Figure 4 , the adjusting mechanism one 10 of the embodiment comprises a bearing block 101, a through slot 102 is formed in the middle of the bearing block 101, a bidirectional screw rod two 103 is rotatably connected inside the through slot 102, a connecting bracket 104 is threadedly connected to the outer surface of the two ends of the bidirectional screw rod two 103, the inner surface of the supporting end of the connecting bracket 104 is rotatably connected to the outer surface of the end of the compression roller one 310, the outer surface of the supporting end of the connecting bracket 104 is fixedly connected with a supporting arm 105, and the inner surface of the other end of the supporting arm 105 is rotatably connected to the outer surface of the end of the compression roller two 320;

[0062] A through slot 102 is formed in the middle of the bearing block 101 along the length direction, a bidirectional screw rod two 103 is rotatably connected inside the through slot 102, opposite threads are formed on the outer surface of the two ends of the bidirectional screw rod two 103, a connecting bracket 104 is threadedly connected to the outer surface of the two ends of the bidirectional screw rod two 103, the connecting bracket 104 has a linear structure, the inner surface of the supporting end of the connecting bracket 104 is rotatably connected to the outer surface of the end of the compression roller one 310 through a bearing, the outer surface of the supporting end of the connecting bracket 104 is fixedly connected with a supporting arm 105, and the inner surface of the other end of the supporting arm 105 is rotatably connected to the outer surface of the end of the compression roller two 320 through a bearing. When the bidirectional screw rod two 103 rotates, it can drive the two groups of connecting brackets 104 to move synchronously and reversely, so as to adjust the distance between the compression roller one 310 and the compression roller two 320.

[0063] As shown in Figure 8 , Figure 9 and Figure 10 , the cooling mechanism of the embodiment comprises oppositely arranged liquid inlet blocks 620, a circulation chamber 622 is arranged inside the liquid inlet block 620, cooling plates 623 are mounted on the opposite sides of the liquid inlet block 620, two groups of connecting pipes 611 are communicated with the inner side of the circulation chamber 622, the other end of the connecting pipe 611 is communicated with an expansion pipe 610, and the other end of the expansion pipe 610 extends out of the cooling cavity 6;

[0064] The liquid inlet block 620 adopts a hollow structure made of copper, a sealed circulation chamber 622 is formed inside the liquid inlet block 620 for cooling liquid flow, the cooling plates 623 are made of high-thermal-conductivity aluminum alloy material, the surface of which is attached to the base material to realize heat exchange, two groups of connecting pipes 611 are symmetrically communicated with the inner side of the circulation chamber 622, the connecting pipe 611 adopts a corrosion-resistant hose, the other end of which is communicated with the expansion pipe 610, the expansion pipe 610 adopts a bellows structure and can expand and contract with the movement of the liquid inlet block 620, the other end of the expansion pipe 610 extends out of the cooling cavity 6 and is connected with an external refrigeration circulating system to form a closed loop cooling liquid circuit.

[0065] As shown in Figures 7-9As shown, the liquid inlet block 620 of the embodiment is fixedly installed with a connecting arm 621 on both sides, a fixed column 630 is fixedly installed inside the cooling cavity 6, the outer surface of the fixed column 630 is in sliding fit with the inside of the first connecting arm 621, the inside side wall of the cooling cavity 6 is provided with an adjusting mechanism two 11, the adjusting mechanism two 11 comprises a side block 111, a bidirectional screw rod three 112 is in rotary fit inside the side block 111, a moving block 113 is threadedly connected to the outer surfaces of both ends of the bidirectional screw rod three 112, the side edge of the moving block 113 is fixedly installed with the side edge of the second connecting arm 621, an adjusting gear 114 is fixedly installed at the end of the bidirectional screw rod three 112, a U-shaped limiting clamp 115 is engaged with the outer surface of the adjusting gear 114, and both feet of the U-shaped limiting clamp 115 are inserted into the upper surface of the side block 111.

[0066] The connecting arm 621 is formed by stamping a steel plate, a cylindrical fixed column 630 is fixedly installed on one side inside the cooling cavity 6, the outer surface of the fixed column 630 is in clearance fit with the inside sliding hole of the first connecting arm 621, forming a guide structure, the inside side wall of the cooling cavity 6 is fixedly provided with an adjusting mechanism two 11, the adjusting mechanism two 11 comprises a side block 111 welded to the side wall, a bidirectional screw rod three 112 is in rotary fit inside the side block 111 through a bearing, a moving block 113 is threadedly connected to the outer surfaces of both ends of the bidirectional screw rod three 112, the side edge of the moving block 113 is fixedly installed with the side edge of the second connecting arm 621, an adjusting gear 114 is fixedly connected to the end of the bidirectional screw rod three 112, a U-shaped limiting clamp 115 is engaged with the outer surface of the adjusting gear 114, both feet of the U-shaped limiting clamp 115 are inserted into the positioning hole in the upper surface of the side block 111, achieving locking and fixing after adjustment, and preventing the bidirectional screw rod three 112 from loosening.

[0067] As shown in Figure 1 , Figure 5 , Figure 6 and Figure 7 , the inner bottom of the reaction cavity 4 of the embodiment is fixedly installed with a bottom block 430 on both sides, a bidirectional screw rod one 431 is in rotary fit inside the upper surface of the bottom block 430, a receiving block 432 is threadedly connected to the outer surfaces of both ends of the bidirectional screw rod one 431, the top of the receiving block 432 is installed with an adjusting mechanism two 11, mounting frames 441 are installed at both ends of the joule heat roller 440, and the side surface of the mounting frame 441 is fixedly installed with the side surface of the moving block 113 in the adjusting mechanism two 11;

[0068] The upper surface of the base block 430 is fitted with a bidirectional lead screw 431 via a bearing. The outer surfaces of both ends of the bidirectional lead screw 431 are machined with reverse threads. The outer surfaces of both ends of the bidirectional lead screw 431 are threadedly connected to receiving blocks 432. An adjustment mechanism 11 is installed on the top of the receiving blocks 432. The two ends of the Joule heating roller 440 are welded with mounting brackets 441. The side of the mounting brackets 441 is fixedly installed with the side of the moving block 113 in the adjustment mechanism 11. When the bidirectional lead screw 431 rotates, it can drive the receiving blocks 432 to move synchronously in the opposite direction. In conjunction with the adjustment mechanism 11, the Joule heating roller 440 can be adjusted in multiple dimensions to ensure heating uniformity.

[0069] like Figure 1 and Figure 6 As shown, in this embodiment, a top cover is bolted to the upper surface of the reaction chamber 4, and a vent pipe 410 is connected to the top cover. A temperature sensing structure 450 is installed in the middle of the inner side of the top cover. A top cover is bolted to the upper surface of the cooling chamber 6.

[0070] The upper surface of the reaction chamber 4 is sealed with a top cover by bolts. The top cover is made of heat-insulating material and is connected to a vent pipe 410 at the top. The vent pipe 410 can be connected to an inert gas source to control the atmosphere inside the reaction chamber 4. A temperature sensing structure 450 is installed in the middle of the inner side of the top cover. The temperature sensing structure 450 uses a thermocouple sensor to monitor the temperature inside the reaction chamber 4 in real time with a measurement accuracy of ±1℃ and feeds the data back to the control box 5. The upper surface of the cooling chamber 6 is also sealed with a top cover by bolts. The inner side of the top cover is pasted with heat insulation cotton to prevent heat exchange between the inside and outside of the chamber from affecting the cooling effect.

[0071] like Figure 1 , Figure 2 and Figure 3 As shown, the mounting mechanism 9 on the support bracket 2 in this embodiment includes two support plates 910. The sides of the support plates 910 are fixedly mounted to the sides of the support bracket 2. A sliding block 920 is slidably fitted inside the upper surface of the support plate 910. A support seat 930 is fixedly mounted on the upper surface of the first sliding block 920. A support rod 931 is rotatably fitted inside the top of the support seat 930. A cross positioning block 932 is fixedly mounted at the end of the support rod 931. A support seat 96 is fixedly mounted on the upper surface of the second sliding block 920. 0. A drive device 940 is installed at the top of the bearing seat 2. A cross positioning block 932 is fixedly installed at the output end of the drive device 940. The end of the unwinding roller 210 is inserted into the outer surface of the cross positioning block 932. The side of the bearing plate 910 included in the mounting mechanism 9 on the bearing bracket 4 8 is fixedly installed with the side of the bearing bracket 4 8. The outer surface of the cross positioning block 932 included in the mounting mechanism 9 is inserted into the end of the winding roller 810. A fixing bolt 950 is threadedly connected at the overlapping position of the sliding block 920 and the bearing plate 910.

[0072] The driving device 940 adopts a servo motor, the output end of which is fixedly installed with a cross positioning block 932 through a shaft coupling. The end portion of the unwinding roller 210 is provided with a cross slot, which is insertedly matched with the outer surface of the cross positioning block 932 to realize torque transmission. The mounting mechanism 9 on the bearing support four 8 is the same as the bearing support one 2, only the power of the driving device 940 is different. The sliding block 920 and the bearing plate 910 are coincidently positioned and are threadedly connected with a fixing bolt 950 at the coincident position, which is used for fixing the position of the sliding block 920 and preventing loosening during work. The driving device 940 adopts a servo driver to work synchronously.

[0073] As shown in Figure 1 , Figure 4 and Figure 5 , the reaction cavity 4 of the embodiment is provided with a wire hole 420 on both sides. A motor is installed on the side surface of the reaction cavity 4. The output shaft of the motor is drivingly connected with the end portion of the bidirectional screw rod one 431 through a linkage shaft. A motor is installed on the lower surface of the bearing block 101. The output shaft of the motor is drivingly connected with the end portion of the through slot 102 through a linkage shaft.

[0074] The wire hole 420 is used for penetrating the power line of the joule heat roller 440 and the signal line of the temperature sensing structure 450. The motor is a servo motor, which works synchronously through a servo driver.

[0075] A method for preparing graphene by continuous roller pressing of tar joule heat, comprising the following steps:

[0076] Step one: complete the substrate loading through the mounting mechanism 9 on the bearing support one 2 and the bearing support four 8. Loosen the fixing bolt 950 on the sliding block 920. Insert the two end cross slots of the unwinding roller 210, on which the to-be-processed substrate is wound, into the cross positioning block 932. Push the sliding block 920 to stably fix the substrate roll. Then, tighten the fixing bolt 950. The winding roller 810 is installed on the bearing support four 8 in the same way.

[0077] Step two: lead out the free end of the substrate on the unwinding roller 210, pass through the roller pressing channel formed by the pressing roller one 310 and the pressing roller two 320 on the bearing support two 3, the joule heat roller 440 in the reaction cavity 4, and the cooling channel between the cooling plates 623 in the cooling cavity 6 in sequence. Finally, fix the substrate on the winding roller 810 after being guided by the two groups of auxiliary rollers 710 on the bearing support three 7. The auxiliary rollers 710 ensure the stability of the substrate tension through the rubber material surface.

[0078] Step 3: The motor at the bottom of the side of the reaction chamber 4 drives the bidirectional lead screw 431 on the bottom block 430 to rotate through the linkage shaft, which drives the receiving blocks 432 at both ends to move synchronously. In conjunction with the adjustment mechanism 11 on the top of the receiving block 432, the moving block 113 is moved by rotating the bidirectional lead screw 112, which in turn moves the mounting frame 441. Finally, the Joule hot roller 440 is adjusted to the best position to fit the substrate. After the adjustment is completed, the U-shaped limit clamp 115 engages with the adjustment gear 114 to lock it in place.

[0079] Inert gas is introduced through the vent pipe 410 on the top cover of reaction chamber 4 to expel the air in the chamber and form a protective atmosphere. Then the top cover is closed and sealed with bolts.

[0080] The internal heating element of the Joule heated roller 440 is activated, and the temperature sensing structure 450 inside the top cover monitors the temperature inside the cavity in real time and feeds it back to the control box 5 to ensure that the temperature is stable within the set optimal reaction range. During the conveying process, the substrate comes into contact with the Joule heated roller 440, and the tar in the middle of the substrate undergoes flash decomposition under the action of Joule heat to generate a graphene structure.

[0081] Step 4: According to the cooling requirements of the substrate after reaction, adjust the position of the liquid inlet block 620 through the adjustment mechanism 2 11 in the cooling chamber 6, rotate the double-acting screw 3 112 to make the moving block 113 drive the liquid inlet block 620 to slide along the fixed column 630 through the connecting arm 621 until the cooling plate 623 maintains a suitable distance from the substrate. After adjustment, fix it with the U-shaped limiting clamp 115. The external refrigeration circulation system delivers coolant to the circulation chamber 622 of the liquid inlet block 620 through the telescopic pipe 610 and the connecting pipe 611. The coolant flows in the chamber and exchanges heat with the substrate after reaction through the highly thermally conductive cooling plate 623, which quickly reduces the temperature of the substrate, so that the graphene structure is shaped and prevents structural defects caused by excessive temperature.

[0082] Step 5: The drive device 940 of the mounting mechanism 9 on the support bracket 48 is started, and the winding roller 810 is driven to rotate through the cross positioning block 932. In conjunction with the synchronous unwinding of the unwind roller 210, the cooled and shaped graphene substrate is evenly wound up, completing the entire continuous preparation process.

[0083] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous roll pressing tar flash Joule heat graphene device, comprising a base (1), characterized in that: the upper surface of the base (1) is sequentially provided with a bearing support one (2), a bearing support two (3), a reaction cavity (4), a cooling cavity (6), a bearing support three (7) and a bearing support four (8), and the side of the base (1) is provided with a control box (5); the bearing support one (2) is rotatably connected with a unwinding roller (210), the side of the bearing support one (2) is provided with a mounting mechanism (9), the unwinding roller (210) is mounted on the bearing support one (2) through the mounting mechanism (9), the bearing support two (3) is a special Y-shaped structure, the first supporting end of the bearing support two (3) is rotatably connected with a pressing roller one (310), the second supporting end of the bearing support two (3) is rotatably connected with a pressing roller two (320), the side of the bearing support two (3) is provided with an adjusting mechanism one (10), the pressing roller one (310) and the pressing roller two (320) are mounted on the bearing support two (3) through the adjusting mechanism one (10), the inside of the reaction cavity (4) is rotatably connected with a Joule heat roller (440), the inside of the reaction cavity (4) is provided with an adjusting mechanism two (11), the Joule heat roller (440) is mounted in the inside of the reaction cavity (4) through the adjusting mechanism two (11), the inside of the cooling cavity (6) is provided with a cooling mechanism, the bearing support three (7) is rotatably connected with two groups of auxiliary rollers (710), the bearing support four (8) is rotatably connected with a winding roller (810), the side of the bearing support four (8) is provided with a mounting mechanism (9), the winding roller (810) is mounted on the bearing support four (8) through the mounting mechanism (9).

2. The continuous roll-on-tar flash evaporation joule heat graphene production apparatus according to claim 1, wherein: The adjusting mechanism one (10) comprises a bearing block (101), a through slot (102) is formed in the middle of the bearing block (101), a bidirectional screw rod two (103) is rotatably connected in the inside of the through slot (102), a connecting support (104) is threadedly connected to the outer surfaces of the two ends of the bidirectional screw rod two (103), the inside of the supporting end of the connecting support (104) is rotatably connected with the outer surface of the end of the pressing roller one (310), a supporting arm (105) is fixedly connected to the outer surface of the supporting end of the connecting support (104), the other end of the supporting arm (105) is rotatably connected with the outer surface of the end of the pressing roller two (320).

3. The continuous roll-on-tar flash evaporation joule heat graphene production apparatus according to claim 1, wherein: The cooling mechanism comprises oppositely arranged liquid inlet blocks (620), a circulating cavity (622) is arranged in the inside of the liquid inlet block (620), a cooling plate (623) is mounted on the opposite side of the liquid inlet block (620), two groups of connecting pipes (611) are communicated with the inside of the circulating cavity (622), a telescopic pipe (610) is communicated with the other end of the connecting pipe (611), the other end of the telescopic pipe (610) extends out of the cooling cavity (6).

4. The continuous roll-to-roll graphene production apparatus from flash pyrolysis of tar using Joule heating according to claim 3, wherein: Both sides of the liquid inlet block (620) are fixedly installed with connecting arms (621), the inside of the cooling cavity (6) is fixedly installed with a fixed column (630), the outer surface of the fixed column (630) is in sliding fit with the inside of the first connecting arm (621), the inside side wall of the cooling cavity (6) is provided with an adjusting mechanism two (11), the adjusting mechanism two (11) comprises a side block (111), the inside of the side block (111) is in rotary fit with a bidirectional screw rod three (112), the outer surfaces of both ends of the bidirectional screw rod three (112) are threadedly connected with moving blocks (113), the side edges of the moving blocks (113) are fixedly installed with the side edges of the second connecting arm (621), the end of the bidirectional screw rod three (112) is fixedly installed with an adjusting gear (114), the outer surface of the adjusting gear (114) is engaged with a U-shaped limiting clamp (115), both feet of the U-shaped limiting clamp (115) are inserted into the upper surface of the side block (111).

5. The continuous roll-on-tar flash evaporation joule heat graphene production apparatus according to claim 1, wherein: Both sides of the inside bottom of the reaction cavity (4) are fixedly installed with bottom blocks (430), the upper surface of the inside of the bottom block (430) is in rotary fit with a bidirectional screw rod one (431), the outer surfaces of both ends of the bidirectional screw rod one (431) are threadedly connected with bearing blocks (432), the top of the bearing block (432) is installed with an adjusting mechanism two (11), both ends of the joule heat roller (440) are installed with mounting racks (441), the side of the mounting rack (441) is fixedly installed with the side of the moving block (113) in the adjusting mechanism two (11).

6. The continuous roll-to-roll graphene production apparatus from flash pyrolysis of tar using Joule heating of claim 1, wherein: The upper surface of the reaction cavity (4) is installed with a top cover through bolts, the top cover is communicated with a breather pipe (410), the inside of the top cover is installed with a temperature sensing structure (450) at the middle position, the upper surface of the cooling cavity (6) is installed with a top cover through bolts.

7. The continuous roll-to-roll graphene production apparatus from flash pyrolysis of tar using Joule heating according to claim 1, wherein: The mounting mechanism (9) on the bearing support one (2) includes two bearing plates (910), the side surfaces of the bearing plates (910) are fixedly installed with the side surfaces of the bearing support one (2), the inner surfaces of the upper surfaces of the bearing plates (910) are slidably connected with sliding blocks (920), the upper surfaces of the first sliding blocks (920) are fixedly installed with bearing seats one (930), the top ends of the bearing seats one (930) are rotatably connected with bearing rods (931), the ends of the bearing rods (931) are fixedly installed with cross positioning blocks (932), the upper surfaces of the second sliding blocks (920) are fixedly installed with bearing seats two (960), the top ends of the bearing seats two are installed with driving devices (940), the output ends of the driving devices (940) are fixedly installed with cross positioning blocks (932), the ends of the unwinding roller (210) are insertedly connected with the outer surfaces of the cross positioning blocks (932), the side surfaces of the bearing plates (910) included in the mounting mechanism (9) on the bearing support four (8) are fixedly installed with the side surfaces of the bearing support four (8), the outer surfaces of the cross positioning blocks (932) included in the mounting mechanism (9) are insertedly connected with the ends of the winding roller (810), and the fixed pins (950) are threadedly connected with the coincident positions of the sliding blocks (920) and the bearing plates (910).

8. The continuous roll-to-roll graphene production apparatus from flash pyrolysis of tar using Joule heating of claim 1, wherein: The reaction cavity (4) is provided with wire harness holes (420) on both sides, and a motor is installed on the side bottom of the reaction cavity (4), and the output shaft of the motor is drivingly connected with the end of the bidirectional screw rod one (431) through a linkage shaft.

9. A continuous roll-to-roll graphene production apparatus using flash vaporization of tar to produce graphene, according to claim 2, wherein: The lower surface of the bearing block (101) is installed with a motor, and the output shaft of the motor is drivingly connected with the end of the through groove (102) through a linkage shaft.

10. The method according to any one of claims 1-9, comprising the following steps: Step one: loading the substrate through the mounting mechanism (9) on the bearing support one (2) and the bearing support four (8), loosening the fixed pin (950) on the sliding block (920), aligning the cross slots at the two ends of the unwinding roller (210) wound with the substrate to be processed with the cross positioning blocks (932), inserting the unwinding roller (210) into the cross positioning blocks (932), pushing the sliding block (920) to stably fix the substrate roll, and then tightening the fixed pin (950); the winding roller (810) is installed on the bearing support four (8) in the same way; Step two: leading the free end of the substrate on the unwinding roller (210) out, passing through the roller pressing channel formed by the pressing roller one (310) and the pressing roller two (320) on the bearing support two (3), the joule heat roller (440) in the reaction cavity (4), and the cooling channel between the cooling plates (623) in the cooling cavity (6) in sequence, and finally fixing the substrate on the winding roller (810) after being guided by the two groups of auxiliary rollers (710) on the bearing support three (7), and the auxiliary rollers (710) ensure the stability of the substrate tension through the rubber material surface. Step three: the motor at the bottom of the side of the reaction cavity (4) drives the bidirectional screw rod one (431) on the bottom block (430) to rotate through the linkage shaft, which drives the two end receiving blocks (432) to move synchronously, and cooperates with the adjusting mechanism two (11) at the top of the receiving block (432) to make the moving block (113) drive the mounting frame (441) to move by rotating the bidirectional screw rod three (112), so as to finally adjust the joule heat roller (440) to the best position of being in contact with the substrate, and after the adjustment is completed, the U-shaped limiting clamp (115) engages the adjusting gear (114) to realize locking; Through the air pipe (410) on the top cover of the reaction cavity (4), inert gas is introduced to exclude air in the cavity to form a protective atmosphere, and then the top cover is closed and sealed by bolts; The internal electric heating element of the joule heat roller (440) is started, the temperature sensing structure (450) inside the top cover monitors the temperature in the cavity in real time and feeds back to the control box (5), so as to ensure that the temperature is stable in the set optimal reaction range, the substrate contacts the joule heat roller (440) in the conveying process, and the tar in the middle of the substrate is flash decomposed under the joule heat to generate a graphene structure; Step four: according to the cooling requirement of the substrate after reaction, the position of the liquid inlet block (620) is adjusted by the adjusting mechanism two (11) in the cooling cavity (6), the bidirectional screw rod three (112) is rotated to make the moving block (113) drive the liquid inlet block (620) to slide along the fixed column (630) through the connecting arm (621), until the cooling plate (623) keeps appropriate distance with the substrate, and after the adjustment, the U-shaped limiting clamp (115) is fixed, the external refrigeration circulating system transports cooling liquid to the circulating chamber (622) of the liquid inlet block (620) through the telescopic pipe (610) and the connecting pipe (611), the cooling liquid flows in the chamber and exchanges heat with the reacted substrate through the high-thermal-conductivity cooling plate (623), so as to quickly reduce the temperature of the substrate, make the graphene structure to be shaped, and prevent structure defects caused by too high temperature; Step five: the driving device (940) of the mounting mechanism (9) on the bearing support four (8) is started, the cross positioning block (932) drives the winding roller (810) to rotate, and cooperates with the synchronous unwinding of the unwinding roller (210) to uniformly wind the cooled and shaped graphene substrate, so as to complete the whole continuous preparation process.

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