CN210559409U - Laboratory is with popped preparation facilities of graphite - Google Patents

Abstract

The utility model discloses a laboratory is with popped preparation facilities of graphite belongs to expanded graphite preparation technical field. The shell cover component comprises a heat-transfer body, a heating body, a heat-insulation body I and a shell body, and the shell cover component comprises a heat-insulation body II, a shell cover, a thermocouple type temperature sensor, a power supply, an ARM processor, an electromagnetic relay, a voltage adjusting device and a socket. The 220V power supply is connected to the socket externally connected with the shell cover component, the heating body of the shell component is powered, the thermocouple type temperature sensor monitors the temperature in the shell component, temperature information is fed back to the ARM processor, the electromagnetic relay is used for adjusting the voltage adjusting device, the temperature in the shell can be kept at the high temperature of 900-1000 ℃ all the time, and the graphite puffing requirement is met. The device has the advantages of simplicity, practicality, controllable temperature and good heat preservation effect, and is suitable for places such as laboratories, scientific research institutes and the like which need a small amount of expanded graphite for research.

Description

Laboratory is with popped preparation facilities of graphite

Technical Field

The utility model relates to a laboratory is with popped preparation facilities of graphite belongs to expanded graphite preparation technical field.

Background

The expanded graphite not only has the excellent characteristics of cold and heat resistance, corrosion resistance, heat conduction, electric conduction, self lubrication and the like of natural graphite, but also has the characteristics of light weight, softness, compressibility, adsorption, biocompatibility and the like which are not possessed by the natural graphite.

With the technological progress and the development of high technology, the expanded graphite, an engineering material with excellent performance, gradually replaces some metal materials and organic synthetic materials in high-speed, corrosion-resistant, wear-resistant, energy-saving and other high-tech fields, and is widely applied to the aspects of petroleum, chemical industry, environmental protection, electric power, military, biomedicine and the like. Such as: the oil stain in the water can be effectively removed by utilizing the hydrophobicity and lipophilicity of the water; it can be prepared into flexible graphite to prepare sealing materials; the medical material is prepared by utilizing the characteristics of good biocompatibility, no toxicity, no odor, no side effect and the like of the medical material; the polarization of the zinc anode during charging can be reduced by adding the expanded graphite into the zinc anode; can be made into fireproof sealing strips, fireproof blocking materials and fireproof rings; the electrothermal conversion rate is more than 97 percent, and the material can generate far infrared rays and is a novel heating material; the expanded graphite is crushed into micro powder, has strong scattering and absorption characteristics on infrared waves, and is a good infrared shielding (stealth) material; in addition, the expanded graphite can be used as a heat insulating and sound insulating material, an electromagnetic shielding element, a catalytic material, or the like.

In view of the many uses of the expanded graphite, the preparation process of the expanded graphite has also been studied in depth, and the main process at present is to use natural flake graphite as a raw material to perform intercalation and oxidation to prepare the expandable graphite, and then to expand the expandable graphite to obtain the expanded graphite. The preparation process of the expanded graphite is more in variety and energy consumption is larger, wherein the expanded graphite has the largest expansion energy consumption, the most common method is to perform high-temperature expansion at 900-1000 ℃ in a muffle furnace or perform expansion by using microwaves, and the two methods both need to consume a large amount of electric energy. The defects of uncontrollable temperature, heavy equipment and the like exist in small-batch preparation.

For example, the invention patent with the chinese application number of 201810772914.8 discloses a microwave gas diffusion method expanded graphite puffing device in 2018, 10 and 30.s, the device comprises a vertically placed microwave excitation cavity, a plurality of microwave sources surround the outside of the microwave excitation cavity, a furnace tube is arranged inside the microwave excitation cavity, an expanded graphite output pipeline is arranged at the top of the furnace tube, the bottom end of the furnace tube is connected with an expandable graphite powder and airflow vortex mixing device through an expandable graphite gas conveying pipeline, a three-way pipe is connected at a feed inlet of the expandable graphite powder and airflow vortex mixing device, the other two ports of the three-way pipe are respectively connected with an expandable graphite feed pipeline and an air inlet pipeline, and the air inlet pipeline is connected with an air blowing device. The device intensification time is short, and graphite intercalation compound can decompose the explosion in the very short time, but, on the one hand, the device is fit for mill mass production expanded graphite, when laboratory etc. need a small amount of expanded graphite, uses the device just can consume a large amount of energy, and on the other hand, the device microwave heating rate is very fast, to small batch production expanded graphite, can have the uneven problem of raw materials heating, and rate of heating is too fast promptly, and the temperature of raw materials is difficult to control.

For another example, chinese patent application No. 201410214298.6, No. 08/2014, discloses a vertical electrical heating graphite expansion furnace, which includes a furnace body, a heating device, and a graphite expansion device. The furnace body is a vertical cylindrical barrel and consists of a shell, a heat-insulating cotton layer, a heat-insulating brick layer, a heating device and an electrode material expansion pipe which are sequentially arranged in the shell, wherein the pipe cavity of the electrode material expansion pipe is a graphite expansion channel, and the electric heating device is a U-shaped silicon carbon rod or a silicon molybdenum rod. However, this patent does not have a temperature monitoring device and it is unpredictable whether the graphite will reach and maintain the proper puffing temperature.

In view of the above-mentioned problems of excessive energy consumption in producing a small amount of expanded graphite, the prior art has also attempted to solve these problems and applied for a patent. For example, chinese patent application No. 201811086864.4, discloses an expandable graphite puffing apparatus in 2018, No. 11/13, which comprises a condenser lens, a support table, a height adjusting structure disposed on the support table, and a crucible disposed on the height adjusting structure, wherein the focus of the condenser lens is located in the crucible. The condensing lens is adopted to condense the sunlight, the space in the crucible can be heated to the high temperature of 900-1000 ℃, the swelling requirement of the expandable graphite can be met, the technology of electric energy heating in the prior art is replaced, and the energy consumption can be greatly reduced. The device is suitable for expanding expandable graphite in small batches, such as laboratories, scientific research institutes and other places needing a small amount of expandable graphite for research. The energy source on which the device relies is solar energy, which is undeniably one of the cleanest energy sources, but it is well known that solar energy is not readily available, e.g., in rainy, cloudy, nighttime, etc., the device cannot be successfully made into expanded graphite; moreover, if the solar energy is used to heat the material to 900-1000 ℃, the required temperature can be reached without doubt by too long heating time, so that the requirement of follow-up in emergency can not be met.

Therefore, how to prepare small-batch expanded graphite with high efficiency and energy conservation is an urgent problem to be solved in the present time by developing a laboratory graphite swelling preparation device.

Disclosure of Invention

1. Problems to be solved

Aiming at the problems of large energy consumption, long preparation period and difficult temperature control of the existing device for preparing a small amount of expanded graphite, the utility model provides a graphite swelling preparation device for laboratories, which realizes the advantages of controllable temperature, good heat preservation effect and the like through simple structural design, and meets the requirements of preparing a small amount of expanded graphite for research in laboratories, scientific research institutes and other places,

2. technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A graphite puffing preparation device for a laboratory comprises a shell component for heating and heat preservation and a shell cover component for sealing and providing energy; the shell component comprises a heat transfer body, a heating body, a heat insulation body I and a shell which are fixedly arranged in sequence, namely the heat insulation body I, the heating body and the heat transfer body are attached to the inner wall of the shell in sequence; the shell cover component comprises a shell cover, a heat insulator II and a circuit system; the heat insulator II is arranged at the closed connection position of the shell cover and the shell component; the circuit system is arranged in the shell cover, is electrically connected with the heating body and is used for providing a power supply for the heating body and adjusting the voltage connected with the heating body.

Further, the heat transfer body is made of a heat-conducting metal material; the heating body is made of carbon fiber wire materials, wherein the diameter of the carbon fiber wire materials is 2 mm-3 mm, and the heating body is preferably a carpet-shaped structure woven by the carbon fiber wires with the diameter of 2 mm-3 mm.

Further, the heat insulator I comprises but is not limited to aerogel felt with the thickness of 1 mm-2 mm and ZS-1 high-temperature-resistant heat-insulating coating, and is used for reducing heat transfer between the external environment and the internal environment of the shell component.

Furthermore, the shell and the shell cover are both made of non-metal materials with high temperature resistance and good heat insulation performance.

Furthermore, a groove is formed in the closed connection position of the shell cover and the shell component, and a heat insulator II is placed in the groove in a matched mode.

Further, the heat insulator II comprises but is not limited to aerogel felt with the thickness of 1 mm-2 mm and ZS-1 high-temperature-resistant heat-insulating coating.

Furthermore, the circuit system comprises a power supply, an ARM processor, an electromagnetic relay, a voltage regulating device and a socket; the power supply, the ARM processor and the electromagnetic relay are sequentially and electrically connected, the voltage adjusting device is formed by connecting a plurality of resistors R with the same resistance in parallel, one end of the voltage adjusting device is electrically connected with the socket, the other end of the voltage adjusting device is electrically connected with the heating body, namely, the voltage adjusting device is connected between the socket and the heating body in series and is used for adjusting output voltage through matching with the electromagnetic relay, and particularly, the electromagnetic relay adjusts the resistance of an access circuit by connecting or disconnecting a parallel circuit branch in the voltage adjusting device so as to adjust the output voltage; the power supply supplies power to the ARM processor and the electromagnetic relay, the ARM processor controls the electromagnetic relay to adjust the size of the resistance of the voltage adjusting device connected to the circuit, and the socket is externally connected with 220V voltage and is used for supplying power to the heating body.

Preferably, the voltage regulating device is formed by connecting 3 resistors R with the same resistance in parallel. The resistance R may be selected to be 100, 200 or 300 ohms, depending on the actual manufacturing requirements.

Further, the power supply is a rechargeable lithium battery, preferably a rechargeable lithium battery with a nominal voltage of 5 volts.

Further, the ARM processor is also electrically connected with a temperature sensor, wherein the temperature measuring end of the temperature sensor is arranged in the inner cavity of the shell component.

Furthermore, the temperature sensor is a thermocouple type temperature sensor with a temperature display function, so that the temperature inside the shell component can be observed conveniently at any time.

Further, the temperature of the inner cavity of the shell component is kept between 900 ℃ and 1000 ℃, and the temperature range is favorable for expanding graphite.

Furthermore, a handle is arranged on the shell cover, so that the shell cover is convenient to hold.

Further, the inner chamber of the shell component is a graphite expanded reaction space.

The utility model relates to a laboratory is with popped preparation facilities of graphite's theory of operation as follows:

the shell cover component is covered on the upper end of the shell component, so that the shell component and the shell cover component form a closed chamber, 220V voltage is externally connected with a socket to supply power to the heating body, the heating body is heated after being connected with electricity, and heat is conducted to the heat transfer body, so that the temperature in the closed chamber formed by the shell component and the shell cover component can be continuously raised, through observing the temperature display of the thermocouple type temperature sensor, when the temperature in the closed chamber formed by the shell component and the shell cover component reaches the range of 900-1000 ℃ required by graphite expansion, the shell cover component is opened, graphite to be expanded is put into the shell component, then the shell cover component is closed, the graphite to be expanded is expanded, under the normal condition, the number of resistors of the voltage regulating device connected into a circuit is 2, if the thermocouple type temperature sensor monitors that the temperature in the closed chamber formed by the shell component and the shell cover, the ARM processor receives temperature information transmitted by the thermocouple type temperature sensor, sends corresponding instructions to the electromagnetic relay, and the electromagnetic relay changes the total resistance value of the voltage adjusting device access circuit by disconnecting one resistor of the access circuit or connecting another resistor R of the non-access circuit into the circuit, so that the voltage division effect is achieved, the power of the heating body is adjusted, and the purpose of adjusting the temperature is achieved.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses the popped preparation facilities of graphite has the temperature controllable, the effectual advantage that keeps warm, can realize the preparation purpose that the laboratory etc. is less to the expanded graphite demand, specifically insert 220V power through the external socket of cap part, supply power for the heating member of housing part, thermocouple formula temperature sensor monitors the temperature in the housing part, and feed back temperature information to the ARM treater, rethread electromagnetic relay adjusts voltage control unit, can make the inside temperature of casing keep the high temperature at 900 ℃ -1000 ℃ all the time, reach the popped requirement of graphite; the device has simple and compact structure and simple operation;

(2) the heating body of the utility model selects carbon fiber material, because the carbon fiber has the advantages of light weight, high strength, high temperature resistance, high elastic modulus and the like, and the carbon fiber is also a good electric heat conversion material; the carbon fiber material after special treatment has stable electrical performance and has incomparable advantages compared with other resistance materials, such as: the anti-oxidation performance is strong when the electric heating furnace is used in a specific environment, the service life is long, the heating power is stable, the electric-heat conversion efficiency reaches 100% when the power is below 500W, and the electric-heat conversion efficiency reaches 98% when the power is above 500W. Compared with the metal wire, PTC and silicon carbide electrothermal bodies widely adopted at present, the thermal efficiency of the electrothermal body is improved by 30 to 40 percent, and the electrothermal power is hardly attenuated; the material can be heated to 3000 ℃ in a specific environment, and the mechanical property and the elastic modulus of the material do not change any bit; in addition, the carbon fiber material is used in an electric heating state, does not follow the Dammann-Franz law, mainly depends on lattice wave heat transfer of lattice vibration, and overcomes the defects of low strength and easy oxidation of metal wires, PTC and silicon carbide electric heating bodies;

(3) the heat insulation materials of the heat insulator I and the heat insulator II are preferably aerogel felts and ZS-1 high-temperature-resistant heat-insulation heat-preservation coating materials; the aerogel felt is selected as a novel heat insulation material, is a porous material with a nano-scale pore diameter, is mainly used for pipeline heat insulation, equipment heat insulation and the like, and has a heat conductivity coefficient of 0.018W/(K.m) at normal temperature and 0.009W/(K.m) at low temperature; ZS-1 high-temperature-resistant heat-insulating coating materials are selected, the temperature resistance range is-80-1800 ℃, the coating materials can directly face flame for heat insulation, the heat conductivity coefficients are only 0.03W/(K.m), the infrared radiation heat and the heat conduction can be effectively inhibited and shielded, the heat insulation inhibition efficiency can reach about 90 percent, the heat radiation and the heat loss of high-temperature objects can be inhibited, the cold insulation can be effectively carried out on low-temperature objects, the cold loss caused by the environment radiation heat can be inhibited, and the condensation of the objects can be prevented;

drawings

FIG. 1 is a schematic view of the structure and composition of the graphite puffing preparation device of the present invention;

fig. 2 is a schematic structural view of the housing component of the present invention;

FIG. 3 is a schematic view of the structure of the housing cover of the present invention;

FIG. 4 is a schematic diagram of the circuit system temperature regulation of the present invention;

in the figure:

1. a housing component; 1-1, a heat transfer body; 1-2, heating body; 1-3, a heat insulator I; 1-4, a shell; 2. a case cover member; 2-1, a shell cover; 2-2, a heat insulator II; 2-3, a temperature sensor; 2-4, a power supply; 2-5, an ARM processor; 2-6, an electromagnetic relay; 2-7, a voltage regulating device; 2-8, a socket; 3. graphite.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

A laboratory graphite swelling preparation apparatus of this embodiment, as shown in FIG. 1, includes a housing member 1 and a cover member 2.

Specifically, as shown in fig. 2, the housing member 1 is used for heating and heat preservation, and includes a heat conductor 1-1, a heating member 1-2, a heat insulator i 1-3, and a housing 1-4, wherein the heat insulator i 1-3, the heating member 1-2, and the heat conductor 1-1 are sequentially attached to the inner wall of the housing 1-4, and it should be noted that the housing 1-4, the heat insulator i 1-3, the heating member 1-2, and the heat conductor 1-1 may be disposed one upon another, and are not fixed in a fixed manner, so that the housing member is convenient to disassemble and disassemble, and a part may be conveniently replaced when damaged; the shells 1 to 4 are made of non-metallic materials with good high temperature resistance and heat insulation, and the shells 1 to 4 are preferably obtained by molding a molding compound FX-502 in the embodiment; the heat insulator I1-3 is a material with good heat insulation performance, in the actual manufacturing process, the heat insulator I1-3 can be aerogel felt with the thickness of 1 mm-2 mm or a layer of ZS-1 high-temperature-resistant heat-insulation coating material is coated on the inner wall of the shell 1-4, and excellent heat insulation effect can be achieved, in the embodiment, the aerogel felt with the thickness of 2mm is selected to be attached to the inner wall of the shell 1-4; the heating body 1-2 can be a carpet-shaped structure woven by carbon fiber wires with the diameter of 2 mm-3 mm and attached to the aerogel felt, the carpet-shaped heating body 1-2 woven by the carbon fiber wires with the diameter of 2mm is selected in the embodiment, and the carbon fiber wires with different diameters are selected according to actual manufacturing requirements; the heat transfer body 1-1 is stainless steel with good heat conductivity and is attached to the other surface of the heating body 1-2.

The shell cover component 2 comprises a shell cover 2-1, a heat insulator II 2-2 and a circuit system as shown in figure 3; the shell cover 2-1 is made of a non-metal material with high temperature resistance and good heat insulation performance, in the embodiment, the shell cover 2-1 is formed by molding a molding compound FX-502 in a molding mode, a groove is formed in the closed connection position of the shell cover 2-1 and the shell component 1, namely, the groove is formed in the bottom of the shell cover 2-1 and used for placing the heat insulation body II 2-2 in a matched mode, and a handle is arranged on the shell cover 2-1 and is convenient to hold; the heat insulator II 2-2 is a material with good heat insulation performance, in the actual manufacturing process, the heat insulator II 2-2 can be made of aerogel felt with the thickness of 1 mm-2 mm or a ZS-1 high-temperature-resistant heat-insulation paint material is coated in the groove, in the embodiment, the aerogel felt with the thickness of 2mm is fixed in the groove through SL8081 sealant, and the SL8081 sealant can resist the high temperature of 1200 ℃.

Referring to fig. 4, the circuit system is used for providing power to the heating elements 1-2 and adjusting the heating temperature of the heating elements 1-2, and comprises temperature sensors 2-3, a power supply 2-4, an ARM processor 2-5, electromagnetic relays 2-6, voltage adjusting devices 2-7 and sockets 2-8. The temperature sensor 2-3 is a thermocouple type temperature sensor, the temperature measuring end of the temperature sensor is arranged in the inner cavity of the shell part 1, the other end of the temperature sensor is connected with the ARM processor 2-5 through an electric wire, and meanwhile, the thermocouple type temperature sensor has a temperature display function and is convenient for observing the temperature inside the shell part 1 at any time; the power supply 2-4 is a rechargeable lithium battery, the nominal voltage is 5V, as shown in FIG. 4, the power supply 2-4 is an ARM processor 2-5 and an electromagnetic relay 2-6, the electromagnetic relay 2-6 is connected with the ARM processor 2-5, the voltage adjusting device 2-7 is formed by connecting 3 resistors R with the same resistance in parallel, wherein the resistance of the resistor R is 100 omega, 200 omega or 300 omega, in the using process, the resistor with the proper resistance is selected according to the requirement, three resistors with the resistance of 100 omega are selected in the embodiment, 2 resistors R in the voltage adjusting device 2-7 are connected into a circuit, the resistance of the voltage adjusting device 2-7 is R/2, the voltage adjusting device 2-7 is connected between a socket 2-8 and a heating body 1-2 in series, and is used for adjusting the output voltage by matching with the electromagnetic relay 2-6, the socket 2-8 is externally connected with 220V voltage to supply power to the heating body 1-2, the temperature sensor 2-3, the power supply 2-4, the ARM processor 2-5, the electromagnetic relay 2-6, the voltage adjusting device 2-7 and the socket 2-8 are fixed in the shell cover 2-1 by a structural adhesive.

The preparation process of the expanded graphite comprises the following steps:

the housing cover 2 is first closed at the upper end of the housing part 1, so that the housing part 1 and the housing cover 2 form a closed chamber, as shown in fig. 1. 220V voltage is externally connected through a socket 2-8 to supply power to a heating body 1-2, the heating body 1-2 generates heat after being connected with electricity, and the heat is conducted to a heat transfer body 1-1, so that the temperature in a closed cavity formed by the shell part 1 and the shell cover part 2 can be continuously increased, through observing the temperature display of the thermocouple type temperature sensor 2-3, when the temperature in the closed cavity formed by the shell part 1 and the shell cover part 2 reaches the range of 900-1000 ℃ required by graphite expansion, the shell cover part 2 is opened, the graphite 3 to be expanded is placed into the shell part 1, then the shell cover part 2 is closed, and the graphite 3 to be expanded is expanded.

If the thermocouple type temperature sensor monitors that the temperature in a closed chamber formed by the shell component 1 and the shell cover component 2 exceeds 1000 ℃, the ARM processor 2-5 receives information that the temperature transmitted by the thermocouple type temperature sensor 2-3 becomes high, the ARM processor 2-5 sends an instruction to the electromagnetic relay 2-6, the electromagnetic relay 2-6 disconnects one resistor R of two access circuits, the total resistance value of the voltage adjusting device becomes R, the voltage shared on the voltage adjusting device is increased, the voltage on the heating body 1-2 becomes small, the power of the heating body becomes small, and the purpose of adjusting the temperature reduction is achieved.

In the same way, if the thermocouple type temperature sensor 2-3 detects that the temperature in the closed chamber formed by the shell component 1 and the shell cover component 2 is lower than 900 ℃, the ARM processor 2-5 receives the information that the temperature transmitted by the thermocouple type temperature sensor 2-3 becomes low, the ARM processor 2-5 sends an instruction to the electromagnetic relay 2-6, the electromagnetic relay 2-6 connects the resistors R of the other two unconnected circuits to one, the total resistance of the voltage regulating device becomes R/3, so that the voltage shared across the voltage regulating devices 2-7 decreases, and then the voltage on the heating body 1-2 is increased, the power of the heating body 1-2 is increased, so as to achieve the purpose of adjusting the temperature rise, and the graphite to be expanded is always in the range of 900-1000 ℃ to carry out the expansion process of the graphite 3. After 25-35 s, the expansion is completed, the shell cover part 2 is opened by using other tools such as a clamp, and the expanded expandable graphite is clamped. The continuous puffing can be realized by repeating the process. It should be noted that graphite can be automatically expanded in this environment, and the shell cover part 2 is opened and the expanded graphite is clamped by the clamp, and because the amount of preparation is small, the graphite can be naturally cooled without cooling operation.

It is worth explaining, the expandable graphite after the industry popped needs the desulfurizer to carry out the sulphur removal technology, and the desulfurizer all needs in fact because all contains sulphur impurity, but the utility model discloses a popped preparation facilities of graphite is used for the laboratory to use, does not carry out the sulphur removal also can, so for laboratory convenient to use, the utility model discloses a popped preparation facilities of graphite does not set up the discharge gate that inserts the desulfurizer. For special requirements, the desulfurizing device can be switched to remove sulfur.

The above is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (10)

1. The utility model provides a laboratory is with popped preparation facilities of graphite which characterized in that: comprises a shell component (1) and a shell cover component (2); the shell component (1) comprises a heat transfer body (1-1), a heating body (1-2), a heat insulation body I (1-3) and a shell (1-4) which are fixedly arranged in sequence; the shell cover component (2) comprises a shell cover (2-1), a heat insulator II (2-2) and a circuit system; the heat insulator II (2-2) is arranged at the closed connection position of the shell cover (2-1) and the shell component (1); the circuit system is arranged in the shell cover (2-1), is electrically connected with the heating body (1-2), and is used for providing a power supply for the heating body (1-2) and adjusting the voltage connected with the heating body (1-2).

2. The laboratory graphite swelling preparation device according to claim 1, characterized in that: the heat transfer body (1-1) is made of a heat-conducting metal material, and the heating body (1-2) is made of a carbon fiber wire material, wherein the diameter of the carbon fiber wire material is 2-3 mm.

3. The laboratory graphite swelling preparation device according to claim 1, characterized in that: the heat insulator I (1-3) comprises aerogel felt or ZS-1 high-temperature-resistant heat-insulating coating with the thickness of 1 mm-2 mm.

4. The laboratory graphite swelling preparation device according to claim 1, characterized in that: a groove is formed in the closed connection position of the shell cover (2-1) and the shell component (1), and a heat insulator II (2-2) is placed in the groove in a matched mode.

5. The laboratory graphite swelling preparation device according to claim 4, characterized in that: the heat insulator II (2-2) comprises aerogel felt or ZS-1 high-temperature-resistant heat-insulating coating with the thickness of 1 mm-2 mm.

6. The laboratory graphite swelling preparation device according to claim 1, characterized in that: the circuit system comprises a power supply (2-4), an ARM processor (2-5), an electromagnetic relay (2-6), a voltage regulating device (2-7) and a socket (2-8); the power supply (2-4), the ARM processor (2-5) and the electromagnetic relay (2-6) are sequentially and electrically connected, the voltage adjusting device (2-7) is formed by connecting a plurality of resistors R with the same resistance in parallel, one end of the voltage adjusting device (2-7) is electrically connected with the socket (2-8), and the other end of the voltage adjusting device is electrically connected with the heating body (1-2); the power supply (2-4) supplies power to the ARM processor (2-5) and the electromagnetic relay (2-6), the ARM processor (2-5) controls the electromagnetic relay (2-6) to adjust the size of the resistor of the voltage adjusting device (2-7) connected to the circuit, and the socket (2-8) is externally connected with 220V voltage.

7. The laboratory graphite swelling preparation device according to claim 6, characterized in that: the power supply (2-4) is a rechargeable lithium battery.

8. The laboratory graphite swelling preparation device according to claim 6, characterized in that: the ARM processor (2-5) is also electrically connected with a temperature sensor (2-3), wherein the temperature measuring end of the temperature sensor (2-3) is arranged in the inner cavity of the shell component (1).

9. The laboratory graphite swelling preparation device according to claim 8, wherein: the temperature sensor (2-3) is a thermocouple type temperature sensor with a temperature display function.

10. The laboratory graphite swelling preparation device according to any one of claims 1 to 9, characterized in that: the shell cover (2-1) is provided with a handle.

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