Anti-oxidation graphite heater

Abstract

The invention relates to the technical field of graphite heaters, and discloses an anti-oxidation graphite heater which comprises a heating base and a heating cylinder, the heating cylinder is installed on the heating base, the interior of the heating cylinder is a cavity with an opening in the bottom, and a vacuumizer is installed on the heating cylinder. A plurality of separated graphite heating plates are fixedly arranged on the inner wall of the heating base, a preheating assembly is arranged in the heating base, the vacuumizing device is started to vacuumize the interior of the heating cylinder to a certain atmospheric pressure, and the preheating assembly is matched, so that the expansion water bag is expanded and wraps the separated graphite heating plates; according to the graphite heater, the graphite heating plate can be heated to a certain temperature in advance in the automatic preheating process, and when formal heating is needed, the required working temperature can be rapidly reached, so that the heating time is shortened, and the heating efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of graphite heaters, and particularly to an antioxidant graphite heater. Background Art

[0002] A graphite heating element refers to an electric furnace heating element component made of graphite material. Graphite has excellent electrical and thermal conductivity. In special industrial furnaces (electric furnaces), graphite is commonly used as a heating element. In early industrial electric furnaces, graphite electrodes were selected as heating elements, and later high-power electrodes with high density were chosen. With the development of the semiconductor industry, for the heating furnaces for refining monocrystalline silicon, monocrystalline germanium, gallium arsenide, indium phosphide and other materials, high-purity fine-structured graphite and isotropic graphite are selected as heating elements. For some special industrial furnaces and test furnaces, carbon cloth or graphite cloth is used as a heating element;

[0003] In the patent application with the application publication number CN106131984B, it includes the cleaning of the substrate, the preparation of the composite film, and the post-treatment of intense light irradiation, etc. The present invention uses silver nanowires synthesized by an improved polyol method and graphene oxide prepared by an improved Hummers method as raw materials. Under normal temperature and pressure, a transparent composite conductive film is coated through a simple spin-coating film-making process. By irradiating the film with intense light, the heating temperature and heating uniformity of the film are enhanced. This heater has a simple structure, low-cost raw materials, an easy-to-operate preparation process flow, and is conducive to industrial production.

[0004] In the prior art including the above patents, during the use of existing graphite heaters, electricity is usually applied to the surface of the graphite heater. When the ambient temperature is low, due to the rapid rise in temperature, the graphite material cannot withstand such rapid thermal changes, resulting in cracking or damage of the heater. This thermal shock also affects the overall structure and performance of the heater. Moreover, an un-preheated graphite heater will also exhibit uneven heating during the heating process. Due to the thermal conductivity characteristics of the graphite material, if the surface temperature distribution of the heater is uneven, it will lead to uneven heat transfer, thus affecting the heating effect and product quality. Summary of the Invention

[0005] The problem to be solved by the present invention is: the problem that it is difficult to preheat the graphite heating plate of the existing graphite heater.

[0006] To solve the above technical problems, the technical solution of the present invention is: an antioxidant graphite heater, including a heating base and a heating cylinder. The heating cylinder is installed on the heating base. The interior of the heating cylinder is a cavity with an open bottom. A vacuum pump is installed on the heating cylinder. A plurality of separated graphite heating plates are fixedly arranged on the inner wall of the heating base. A preheating component is arranged inside the heating base;

[0007] The preheating component includes a preheating protective shell fixed to the inner wall of the heating cylinder, and each preheating protective shell is located above the separated graphite heating plate. A plurality of electric telescopic rods are installed on the heating cylinder, and a preheating seat is fixedly arranged at the bottom end of each electric telescopic rod. An expansion water bag is fixedly arranged inside each preheating seat. A water tank body is fixedly arranged at the top end of the heating cylinder, and the bottom end of the water tank body extends into the heating cylinder. Two water inlets are arranged on each expansion water bag. A first steel telescopic pipe is fixedly arranged on each preheating seat, and a second steel telescopic pipe is arranged on the preheating seat on one side of the first steel telescopic pipe. Two water passing cavities are respectively opened below the first steel telescopic pipe and the second steel telescopic pipe on each preheating seat. A heat circulation component is arranged inside the water passing cavity below the first steel telescopic pipe. Pressure relief valves are fixedly arranged at the top ends of the first steel telescopic pipe and the second steel telescopic pipe. A pressure relief component is arranged inside each pressure relief valve, and one end of each pressure relief valve is communicated with the water tank body. A heat absorption plate is fixedly arranged at the bottom end of the water tank body, and a constant temperature heater is installed on the inner wall of the water tank body.

[0008] Preferably, a plurality of hydraulic lifting rods are installed on the arc-shaped outer wall of the heating cylinder, and the bottom end of each hydraulic lifting rod contacts the top end of the heating base. The output end of the vacuum pump is communicated with the cavity inside the heating cylinder.

[0009] Preferably, the plurality of separated graphite heating plates are distributed in a circular array. The inside of the expansion water bag is hollow. The first steel telescopic pipe and the second steel telescopic pipe are respectively located above the two water passing cavities. The pressure relief valve and the abutting block are symmetrically arranged with respect to the electric telescopic rod.

[0010] Preferably, the heat circulation component includes a rotating seat fixed to the inner wall of the water passing cavity. A rotating shaft body is rotatably arranged on the rotating seat. A water turbine is fixedly arranged on the arc-shaped outer wall of the rotating shaft body. A limiting ring is fixedly arranged on the rotating shaft body below the water turbine. A torsion spring is fixedly arranged between the bottom end of the limiting ring and the top end of the rotating seat, and the torsion spring is sleeved on the outer wall of the rotating shaft body. The bottom ends of the two water passing cavities are respectively communicated with the expansion water bag through two water inlets, and the top ends of the two water passing cavities are respectively communicated with the first steel telescopic pipe and the second steel telescopic pipe.

[0011] Preferably, the pressure relief component includes a fixed rod fixed to the inner wall of the pressure relief valve. An abutting block is inserted on the fixed rod. A return spring is fixedly arranged between the fixed rod and the abutting block. An abutting seat is fixed on the inner wall of the pressure relief valve, and the abutting block is engaged with the abutting seat.

[0012] Preferably, a cleaning component is arranged at the bottom end of the preheating seat. The cleaning component includes a collecting box fixed to the bottom end of the preheating seat. A cleaning brush is fixed on the preheating seat, and the cleaning brush is located above the collecting box.

[0013] Preferably, a preheating liquid is provided inside the water tank body. The constant temperature heater is connected to a power supply through an electric wire, and an antioxidant ceramic coating is provided on the outer surface of the separable graphite heating plate.

[0014] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0015] (1) By starting the vacuum pump to evacuate the inside of the heating cylinder to a certain atmospheric pressure and cooperating with the preheating assembly, the present invention can cause the expansion water bag to expand and wrap the separable graphite heating plate. Then, with the cooperation of the heat circulation assembly, the separable graphite heating plate can be continuously preheated. During the automatic preheating process of the graphite heater, the temperature inside the heater can be raised to a certain level in advance. When formal heating is required, the required working temperature can be quickly reached, thus shortening the heating time and improving the heating efficiency. Moreover, when the graphite heater is directly heated in the cold state, large thermal stresses will be generated, which may cause damage to the heater in the long run. Through automatic preheating, the temperature of the heater can be gradually increased, reducing the generation of thermal stresses, and thus extending the service life of the heater;

[0016] (2) By starting the electric telescopic rod to drive the preheating seat to move downward, during this process, the cleaning brush can contact the surface of the separable graphite heating plate and brush off impurities such as black oxides and white lumps adhering to the surface of the separable graphite heating plate and collect them into the collection box, thus playing the role of automatic cleaning. Impurities such as black oxides and white lumps on the surface of the graphite heating plate will affect its heat conduction performance. These impurities will form a heat insulation layer, hindering the transfer of heat and resulting in a reduction in heating efficiency. By automatically brushing off these impurities, the cleanliness of the surface of the graphite heating plate can be ensured, thus maintaining its high heat conduction performance. The presence of impurities will not only affect the heating efficiency but may also cause physical damage to the graphite heating plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is a schematic cross-sectional structure diagram of the graphite heater of the present invention;

[0019] Figure 3 is the present invention Figure 2 partial enlarged view of A in;

[0020] Figure 4 is a schematic connection structure diagram of the preheating assembly and the separable graphite heater of the present invention;

[0021] Figure 5 is a schematic structure diagram of the preheating assembly of the present invention;

[0022] Figure 6Explosion structure schematic diagram of the preheating component of the present invention;

[0023] Figure 7 Structure schematic diagram of the preheating base of the present invention;

[0024] Figure 8 For the present invention Figure 7 Partial enlarged view of B in;

[0025] Figure 9 For the present invention Figure 7 Partial enlarged view of C in;

[0026] Figure 10 Connection structure schematic diagram of the rotating base and the rotating shaft body of the present invention;

[0027] Figure 11 Structure schematic diagram of the first pressure relief valve of the present invention.

[0028] In the figure: 1. Heating base; 11. Heating cylinder; 12. Hydraulic lifting rod; 13. Vacuum pump; 14. Split graphite heating plate;

[0029] 2. Preheating component; 21. Preheating protective shell; 22. Preheating base; 221. Electric telescopic rod; 23. Expansion water bag; 24. First steel telescopic pipe; 241. Second steel telescopic pipe; 25. Pressure relief valve; 251. Block; 252. Fixed rod; 253. Support seat; 26. Water tank body; 261. Heat absorption plate; 262. Constant temperature heater; 27. Rotating base; 28. Rotating shaft body; 281. Torsion spring; 29. Water turbine;

[0030] 3. Cleaning component; 31. Cleaning brush; 32. Collection box. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0032] Unless otherwise defined, technical terms or scientific terms used in this disclosure shall have the ordinary meanings as understood by those of ordinary skill in the field to which this disclosure pertains. The words such as "including" or "comprising" used in this disclosure are intended to mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The words such as "connected" or "coupled" are not limited to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", and "right" are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0033] As Figures 1 to 11 shown, an antioxidant graphite heater provided by the present invention includes a heating base 1 and a heating cylinder 11. The heating cylinder 11 is installed on the heating base 1. The interior of the heating cylinder 11 is a cavity with an open bottom. A vacuum pump 13 is installed on the heating cylinder 11. A plurality of separated graphite heating plates 14 are fixedly arranged on the inner wall of the heating base 1. A preheating assembly 2 is arranged inside the heating base 1;

[0034] The preheating assembly 2 includes a preheating protective shell 21 fixed to the inner wall of the heating cylinder 11, and each preheating protective shell 21 is located above the separated graphite heating plates 14. A plurality of electric telescopic rods 221 are installed on the heating cylinder 11, and a preheating seat 22 is fixedly arranged at the bottom end of each electric telescopic rod 221. An expansion water bag 23 is fixedly arranged inside each preheating seat 22. A water tank body 26 is fixedly arranged at the top end of the heating cylinder 11, and the bottom end of the water tank body 26 extends into the heating cylinder 11. Two water inlets are arranged on each expansion water bag 23. A first steel telescopic tube 24 is fixedly arranged on each preheating seat 22, and a second steel telescopic tube 241 is arranged on the preheating seat 22 on one side of the first steel telescopic tube 24. Two water passing cavities are respectively opened on each preheating seat 22 below the first steel telescopic tube 24 and the second steel telescopic tube 241. A heat circulation assembly is arranged inside the water passing cavity below the first steel telescopic tube 24. Pressure relief valves 25 are fixedly arranged at the top ends of the first steel telescopic tube 24 and the second steel telescopic tube 241. A pressure relief assembly is arranged inside each pressure relief valve 25, and one end of each pressure relief valve 25 is communicated with the water tank body 26. A heat absorption plate 261 is fixedly arranged at the bottom end of the water tank body 26. A constant temperature heater 262 is installed on the inner wall of the water tank body 26.

[0035] A plurality of hydraulic lifting rods 12 are installed on the arc-shaped outer wall of the heating cylinder 11, and the bottom end of each hydraulic lifting rod 12 is in contact with the top end of the heating base 1. The output end of the vacuum pump 13 is communicated with the cavity inside the heating cylinder 11.

[0036] A plurality of separate graphite heating plates 14 are distributed in an annular array. The inside of the expansion water bag 23 is hollow. The first steel telescopic pipe 24 and the second steel telescopic pipe 241 are respectively located above the two water passing cavities. The pressure relief valve 25 and the abutting block 251 are symmetrically arranged with respect to the electric telescopic rod 221.

[0037] The heat circulation component includes a rotating seat 27 fixed to the inner wall of the water passing cavity. A rotating shaft body 28 is rotatably arranged on the rotating seat 27. A water turbine 29 is fixedly arranged on the arc-shaped outer wall of the rotating shaft body 28. A limiting ring is fixedly arranged below the water turbine 29 on the rotating shaft body 28. A torsion spring 281 is fixedly arranged between the bottom end of the limiting ring and the top end of the rotating seat 27, and the torsion spring 281 is sleeved on the outer wall of the rotating shaft body 28. The bottom ends of the two water passing cavities are respectively communicated with the expansion water bag 23 through two water inlets, and the top ends of the two water passing cavities are respectively communicated with the first steel telescopic pipe 24 and the second steel telescopic pipe 241.

[0038] The pressure relief component includes a fixing rod 252 fixed to the inner wall of the pressure relief valve 25. An abutting block 251 is inserted on the fixing rod 252. A return spring is fixedly arranged between the fixing rod 252 and the abutting block 251. An abutting seat 253 is fixed on the inner wall of the pressure relief valve 25, and the abutting block 251 is engaged with the abutting seat 253.

[0039] The inside of the water tank body 26 is provided with a preheating liquid. The constant temperature heater 262 is connected to the power supply through an electric wire. The outer surface of the separate graphite heating plate 14 is provided with an antioxidant ceramic coating.

[0040] When preheating multiple separate graphite heating plates 14, multiple hydraulic lifting rods 12 can be started, and the heating cylinder 11 and the heating base 1 are in a sealed state. At this time, by starting the electric telescopic rod 221, the preheating seat 22 can be gradually separated from the preheating protective shell 21, and the preheating seat 22 can be moved downward to one side of the separate graphite heating plate 14. At the same time, the first steel telescopic pipe 24 and the second steel telescopic pipe 241 are stretched. At this time, by starting the vacuum pump 13 and evacuating the internal cavity part of the heating cylinder 11, during this process, the air pressure inside the heating cylinder 11 decreases, so that the shriveled expansion water bag 23 inside the preheating seat 22 expands, and the preheating liquid at a constant temperature inside the water tank body 26 is extracted and enters the expansion water bag 23 through the two pressure relief valves 25, the first steel telescopic pipe 24 and the second steel telescopic pipe 241 respectively. During this process, the pressure inside the first steel telescopic pipe 24 and the second steel telescopic pipe 241 is less than the pressure on one side of the abutting block 251, so that the preheating liquid pushes the abutting block 251 to slide on the outer wall of the fixed rod 252 and compresses the return spring. At the same time, when the preheating liquid passes through the water cavity below the first steel telescopic pipe 24, the preheating liquid impacts the surface of the water turbine 29, which can cause the water turbine 29 to rotate to one side and drive the rotation of the rotating shaft body 28, and at the same time compress the torsion spring 281 fixed between the rotating shaft body 28 and the rotating seat 27. At this time, the expanded expansion water bag 23 can gradually cover and wrap the surface of the separate graphite heating plate 14 as the air pressure inside the heating cylinder 11 increases. Then, the multiple separate graphite heating plates 14 can respectively absorb the heat of the preheating liquid at a constant temperature inside the multiple expansion water bags 23. When the expansion water bag 23 completely wraps one side of the separate graphite heating plate 14, the vacuum pump 13 stops evacuating the internal cavity of the heating cylinder 11. At this time, the expansion water bag 23 stops expanding, the water turbine 29 is no longer impacted by the preheating liquid, and the pressure outside the expansion water bag 23 is constant, resulting in a constant shape of the expansion water bag 23. And the abutting blocks 251 inside the two pressure relief valves 25 are engaged with the abutting seats 253 under the action of the return spring, so that the two pressure relief valves 25 are closed at the same time. At this time, the water turbine 29 drives the water turbine 29 to rotate to the other side under the elastic force of the torsion spring 281, and the preheating liquid inside the expansion water bag 23 can be extracted, and the preheating liquid inside the expansion water bag 23 enters the pressure relief valve 25 through the first steel telescopic pipe 24. At this time, the pressure relief valve 25 is reopened, so that the preheating liquid inside the pressure relief valve 25 enters the water tank body 26. At the same time, the preheating liquid inside the second steel telescopic pipe 241 is extracted by the water turbine 29, so that the preheating liquid inside the water tank body 26 continuously enters the second steel telescopic pipe 241 through the opened pressure relief valve 25, so as to achieve the effect of heat circulation, and finally achieve the effect of preheating the separate graphite heating plate 14. When the separate graphite heating plate 14 finishes preheating, by starting the vacuum pump 13 and making the internal cavity of the heating cylinder 11 return to normal atmospheric pressure,At this time, the inflated expansion water bag 23 gradually returns to the deflated state as the air pressure recovers, and the preheating liquid inside it is pushed back into the water tank body 26. At this time, the electric telescopic rod 221 is activated to move the preheating seat 22 upward, and the preheating seat 22 and the preheating protective shell 21 are in a closed state. When heating the material inside the heating cylinder 11, the preheating liquid inside the water tank body 26 can absorb the heat inside the heating cylinder 11 through the heat absorption plate 261. When the heating cylinder 11 stops operating, the constant temperature heater 262 inside the water tank body 26 can keep the preheating liquid inside the water tank body 26 at a constant temperature.

[0041] A cleaning component 3 is arranged at the bottom end of the preheating seat 22. The cleaning component 3 includes a collecting box 32 fixed to the bottom end of the preheating seat 22, and a cleaning brush 31 is fixed on the preheating seat 22, and the cleaning brush 31 is located above the collecting box 32.

[0042] When preheating multiple separate graphite heating plates 14, with the cooperation of the preheating component 2, the preheating seat 22 can be moved downward. During this process, the cleaning brush 31 on the preheating seat 22 can contact the surface of the separate graphite heating plate 14, and brush off impurities such as black oxides and white lumps adhered to the surface of the separate graphite heating plate 14 and collect them into the collecting box 32, which can play a cleaning role.

[0043] Working principle and usage process of the present invention: When preheating multiple separate graphite heating plates 14, multiple hydraulic lifting rods 12 can be started, and the heating cylinder 11 and the heating base 1 are in a sealed state. At this time, by starting the electric telescopic rod 221, the preheating seat 22 can be gradually separated from the preheating protective shell 21, and the preheating seat 22 can move downward to one side of the separate graphite heating plate 14. At the same time, the first steel telescopic pipe 24 and the second steel telescopic pipe 241 are stretched. At this time, by starting the vacuum pump 13 and evacuating the internal cavity part of the heating cylinder 11, during this process, the air pressure inside the heating cylinder 11 decreases, so that the shriveled expansion water bag 23 inside the preheating seat 22 expands, and the preheating liquid at a constant temperature inside the water tank body 26 is extracted and enters the expansion water bag 23 through the two pressure relief valves 25, the first steel telescopic pipe 24, and the second steel telescopic pipe 241 respectively. During this process, the pressure inside the first steel telescopic pipe 24 and the second steel telescopic pipe 241 is less than the pressure on one side of the abutting block 251, so that the preheating liquid pushes the abutting block 251 to slide on the outer wall of the fixed rod 252 and compresses the return spring. At the same time, when the preheating liquid passes through the water passing cavity below the first steel telescopic pipe 24, the preheating liquid impacts the surface of the water turbine 29, which can cause the water turbine 29 to rotate to one side and drive the rotation of the rotating shaft body 28, and at the same time compress the torsion spring 281 fixed between the rotating shaft body 28 and the rotating seat 27. At this time, the expanded expansion water bag 23 can gradually cover and wrap the surface of the separate graphite heating plate 14 as the air pressure inside the heating cylinder 11 increases. Then, multiple separate graphite heating plates 14 can respectively absorb the heat of the preheating liquid at a constant temperature inside multiple expansion water bags 23. When the expansion water bag 23 completely wraps one side of the separate graphite heating plate 14, the vacuum pump 13 stops evacuating the internal cavity of the heating cylinder 11. At this time, the expansion water bag 23 stops expanding, the water turbine 29 is no longer impacted by the preheating liquid, and the pressure outside the expansion water bag 23 is constant, resulting in a constant shape of the expansion water bag 23. And the abutting blocks 251 inside the two pressure relief valves 25 are engaged with the abutting seats 253 under the action of the return spring, so that the two pressure relief valves 25 are simultaneously closed. At this time, the water turbine 29 drives the water turbine 29 to rotate to the other side under the elastic force of the torsion spring 281, and can extract the preheating liquid inside the expansion water bag 23, and the preheating liquid inside the expansion water bag 23 enters the pressure relief valve 25 through the first steel telescopic pipe 24. At this time, the pressure relief valve 25 is reopened, so that the preheating liquid inside the pressure relief valve 25 enters the water tank body 26. At the same time, under the extraction of the water turbine 29, the preheating liquid inside the second steel telescopic pipe 241 enables the preheating liquid inside the water tank body 26 to continuously enter the second steel telescopic pipe 241 through the opened pressure relief valve 25, so as to achieve the effect of heat circulation, and finally achieve the effect of preheating the separate graphite heating plate 14. When the separate graphite heating plate 14 finishes preheating, by starting the vacuum pump 13,And the internal cavity of the heating cylinder 11 is restored to normal atmospheric pressure. At this time, the expanded expansion water bag 23 gradually returns to the dry state as the air pressure recovers, and the preheating liquid inside it is pushed back into the water tank body 26. At this time, the electric telescopic rod 221 is started to move the preheating seat 22 upward, and the preheating seat 22 and the preheating protective shell 21 are in a closed state. When heating the material inside the heating cylinder 11, the preheating liquid in the water tank body 26 can absorb the heat inside the heating cylinder 11 through the heat absorption plate 261. When the heating cylinder 11 stops operating, the constant temperature heater 262 inside the water tank body 26 can keep the preheating liquid inside the water tank body 26 at a constant temperature. While the preheating seat 22 moves downward, the cleaning brush 31 on the preheating seat 22 can contact the surface of the separated graphite heating plate 14, and brush off impurities such as black oxides and white lumps adhered to the surface of the separated graphite heating plate 14, and collect them into the collection material box 32, which can play a cleaning role.

[0044] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. An anti-oxidation graphite heater, comprising a heating base (1) and a heating cylinder (11), characterized in that: The heating cylinder (11) is mounted on the heating base (1); the interior of the heating cylinder (11) is a cavity with an opening at the bottom; a vacuum extractor (13) is mounted on the heating cylinder (11); a plurality of separate graphite heating plates (14) are fixedly mounted on the inner wall of the heating base (1); and a preheating assembly (2) is disposed inside the heating base (1); The preheating assembly (2) comprises a preheating protective shell (21) fixed to the inner wall of the heating cylinder (11), and each preheating protective shell (21) is located above the separate graphite heating plate (14); a plurality of electric telescopic rods (221) are installed on the heating cylinder (11), and a preheating seat (22) is fixedly arranged at the bottom end of each electric telescopic rod (221); an expansion water bag (23) is fixedly arranged inside each preheating seat (22); a water tank body (26) is fixedly arranged at the top end of the heating cylinder (11), and the bottom end of the water tank body (26) extends into the interior of the heating cylinder (11); each expansion water bag (23) is provided with two water inlets; each preheating seat (22) is fixedly provided with a first steel telescopic tube (24); and the preheating seat (22) A second steel telescopic tube (241) is arranged on one side of the first steel telescopic tube (24); two water passage chambers are respectively arranged below the first steel telescopic tube (24) and the second steel telescopic tube (241) on each of the preheating seats (22); a heat circulation component is arranged inside the water passage chamber below the first steel telescopic tube (24); a pressure relief valve (25) is fixedly arranged at the top of each of the first steel telescopic tube (24) and the second steel telescopic tube (241); a pressure relief component is arranged inside each of the pressure relief valves (25); and one end of each of the pressure relief valves (25) is communicated with a water tank body (26); a heat absorbing plate (261) is fixedly arranged at the bottom end of the water tank body (26); and a constant temperature heater (262) is installed on the inner wall of the water tank body (26).

2. The oxidation resistant graphite heater according to claim 1, characterized in that: A plurality of hydraulic lifting rods (12) are installed on the arc-shaped outer wall of the heating cylinder (11), and the bottom end of each hydraulic lifting rod (12) is in contact with the top end of the heating base (1), and the output end of the vacuum extractor (13) is connected to the cavity inside the heating cylinder (11).

3. The oxidation resistant graphite heater according to claim 1, characterized in that: The plurality of separate graphite heating plates (14) are distributed in a ring array, the interior of the expansion water bag (23) is hollow, the first steel telescopic tube (24) and the second steel telescopic tube (241) are respectively located above the two water passage chambers, and the pressure relief valve (25) and the stop block (251) are symmetrically arranged about the electric telescopic rod (221).

4. The oxidation-resistant graphite heater according to claim 1, characterized in that: The thermal circulation component comprises a rotating seat (27) fixed to the inner wall of the water passage chamber, a rotating shaft body (28) is rotatably arranged on the rotating seat (27), a water turbine (29) is fixedly arranged on the arc-shaped outer wall of the rotating shaft body (28), a limit ring is fixedly arranged on the rotating shaft body (28) below the water turbine (29), a torsion spring (281) is fixedly arranged between the bottom end of the limit ring and the top end of the rotating seat (27), and the torsion spring (281) is sleeved on the outer wall of the rotating shaft body (28), the bottom ends of the two water passage chambers are respectively connected to the expansion water bag (23) through two water inlets, and the top ends of the two water passage chambers are respectively connected to the first steel telescopic tube (24) and the second steel telescopic tube (241).

5. The oxidation resistant graphite heater according to claim 1, characterized in that: The pressure relief assembly comprises a fixed rod (252) fixed to the inner wall of the pressure relief valve (25); a stop block (251) is inserted into the fixed rod (252); a return spring is fixedly arranged between the fixed rod (252) and the stop block (251); a stop seat (253) is fixed to the inner wall of the pressure relief valve (25), and the stop block (251) is engaged with the stop seat (253).

6. The oxidation resistant graphite heater according to claim 1, characterized in that: A cleaning assembly (3) is provided at the bottom end of the preheating seat (22), and the cleaning assembly (3) comprises a collecting material box (32) fixed to the bottom end of the preheating seat (22). A cleaning brush (31) is fixed on the preheating seat (22), and the cleaning brush (31) is located above the collecting material box (32).

7. The oxidation resistant graphite heater according to claim 1, characterized in that: The water tank body (26) is provided with a preheating liquid inside, the constant temperature heater (262) is connected to a power source via an electric wire, and the outer surface of the separate graphite heating plate (14) is provided with an anti-oxidation ceramic coating.

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