Graphene heating tube and forming method thereof

Abstract

The invention provides a graphene heating tube and a forming method thereof.The graphene heating tube comprises a graphene heating resistor, a quartz heating tube, a silicon carbide heat collection tube and a ceramic heat insulation fixing seat, the graphene heating resistor is longitudinally installed in the quartz heating tube, and the quartz heating tube is sealed and vacuumized and then filled with inert gas or nitrogen; the silicon carbide heat collecting pipe is arranged outside the quartz heating pipe in a sleeved mode, a gap is reserved between the silicon carbide heat collecting pipe and the quartz heating pipe, the gap is filled with heat conducting media, the two ends of the silicon carbide heat collecting pipe and the two ends of the quartz heating pipe are fixedly packaged through the ceramic heat insulation fixing seats respectively, and the middle of the silicon carbide heat collecting pipe is exposed outside. According to the graphene heating tube and the forming method thereof provided by the invention, heat generated by electrifying the graphene heating resistor can be fully utilized, the heat is radiated to the silicon carbide heat collecting tube through the quartz heating tube, the silicon carbide heat collecting tube gathers the heat, and the temperature of the silicon carbide heat collecting tube is increased under the heat storage action of the silicon carbide heat collecting tube.

Description

Technical Field

[0001] The present invention relates to the technical field of heating tubes, and in particular to a graphene heating tube and a forming method thereof. Background Art

[0002] CN117641632A discloses a graphene heating tube and its manufacturing method, which uses graphene material as the heating structure, and the outer tube and supporting components are made of quartz. This structure can improve the efficiency of the heating tube due to the high heat efficiency of graphene. However, under the premise of a certain input power, the operating temperature of the entire heating tube is basically determined and cannot be further improved. If the heating tube wants to achieve a higher operating temperature, the input power must be increased, but this will lead to increased energy consumption. The higher the input power, the shorter the operating life.

[0003] Therefore, based on the current status of existing technology, if the operating temperature can be significantly increased while the input power is determined, it will not only reduce energy consumption but also extend the service life of the entire heating tube. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a graphene heating tube and a forming method thereof. By arranging a silicon carbide heat pipe outside the quartz heating tube wall, heat is trapped, and the heat is concentrated on the silicon carbide heat pipe after passing through the quartz heating tube wall, thereby achieving a temperature amplification effect.

[0005] In order to solve the above technical problems, the present invention provides a graphene heating tube, including a graphene heating resistor, a quartz heating tube, a silicon carbide heat collecting tube, and a ceramic thermal insulation fixing seat. The graphene heating resistor is longitudinally installed in the quartz heating tube, and the quartz heating tube is sealed and vacuumed and then filled with inert gas or nitrogen. The silicon carbide heat collecting tube is sleeved on the outside of the quartz heating tube, and a gap is retained between the silicon carbide heat collecting tube and the quartz heating tube, and a heat conductive medium is filled in the gap. The two ends of the silicon carbide heat collecting tube and the quartz heating tube are respectively fixed and packaged by the ceramic thermal insulation fixing seat, so that the middle part of the silicon carbide heat collecting tube is exposed to the outside.

[0006] Both ends of the quartz heating tube are flat structures, and both ends of the graphene heating resistor are connected to the outside through electrode sheets passing through the flat structures at both ends of the quartz heating tube.

[0007] The ceramic heat-insulating fixing seat is a cap-shaped structure, and two parallel clamping blocks are provided inside. The flat structure of the quartz heating tube is inserted between the two clamping blocks, and is thus fixedly clamped by the clamping blocks.

[0008] A lead-out hole is also provided on the ceramic heat-insulating fixing seat between the two clamping blocks for leading out the electrode sheet or a wire connected to the electrode sheet.

[0009] The end of the silicon carbide heat collecting tube is inserted into the ceramic heat insulating fixing seat, and the ceramic heat insulating fixing seat and the end of the silicon carbide heat collecting tube are sealed and connected by heat-resistant glue.

[0010] The heat transfer medium is nitrogen, heat transfer oil, deionized water or air.

[0011] Two ceramic heat-insulating fixing seats are respectively provided with medium ports, one of which serves as a heat-conducting medium inlet, and the other serves as a heat-conducting medium outlet.

[0012] Open the heat transfer medium inlet and outlet, and allow the heat transfer medium to enter the silicon carbide heat collecting tube from the heat transfer medium inlet, then pass through the gap between the silicon carbide heat collecting tube and the quartz heating tube, and be discharged through the heat transfer medium outlet.

[0013] The material of the quartz heating tube is quartz, the material of the silicon carbide heat collecting tube is silicon carbide, and the thermal conductivity λ1 of quartz is higher than the thermal conductivity λ2 of silicon carbide. The thickness d of the quartz heating tube is smaller than the thickness D of the silicon carbide heat collecting tube, and at the same time, the following conditions are met: λ2*R 2 / D<λ1*r 2 / d<2λ2*R 2 / D; Where r is the radius of the quartz heating tube and R is the radius of the silicon carbide heat collecting tube.

[0014] The present invention also provides a method for forming a graphene heating pipe, comprising: Provide quartz heating tubes with graphene heating resistors encapsulated inside; Providing a silicon carbide heat collecting tube, passing the quartz heating tube through the silicon carbide heat collecting tube, and arranging it in the center; Provide a ceramic heat-insulating fixture, insert the flat structure at the end of the quartz heating tube into the clamping block of the ceramic heat-insulating fixture, and connect the electrode at the end of the quartz heating tube to the wire, passing the wire through the lead-out hole of the ceramic heat-insulating fixture; Apply heat-resistant glue to the circumference of the end of the silicon carbide heat collecting tube, and then connect the ceramic heat insulation fixing seat to the end of the silicon carbide heat collecting tube.

[0015] The graphene heating tube and forming method provided by the present invention can fully utilize the heat generated by the graphene heating resistor when it is energized, and radiate the heat to the silicon carbide heat collecting tube through the quartz heating tube. The silicon carbide heat collecting tube gathers the heat, and the temperature of the silicon carbide heat collecting tube rises due to the heat storage effect of the silicon carbide heat collecting tube. Compared with the quartz structure used on the outside of conventional graphene heating tubes, the graphene heating tube produced by the present invention adopts the structural characteristics of combining silicon carbide and quartz, which can not only ensure the high efficiency of graphene heating, but also accumulate heat on the silicon carbide heat collecting tube, so that the operating temperature of the graphene heating tube provided by the present invention is greatly improved compared with conventional graphene heating tubes. Under the same power and voltage input conditions, the graphene heating tube provided by the present application can achieve a higher operating temperature, thereby achieving the effects of energy saving and extending service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the graphene heating tube according to an embodiment of the present invention.

[0017] In the picture: 1- Graphene heating resistor; 2- Quartz heating tube; 3- Silicon carbide heat collecting tube; 4- Ceramic thermal insulation fixing base. DETAILED DESCRIPTION

[0018] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] like Figure 1As shown, the present invention provides a graphene heating tube, comprising a graphene heating resistor 1, a quartz heating tube 2, a silicon carbide heat collecting tube 3, and a ceramic heat-insulating fixing base 4. The graphene heating resistor 1 is longitudinally mounted in the quartz heating tube 2. The quartz heating tube 2 is sealed and evacuated, then filled with an inert gas or nitrogen. The silicon carbide heat collecting tube 3 is sleeved on the outside of the quartz heating tube 2, with a gap between the silicon carbide heat collecting tube 3 and the quartz heating tube 2, and the gap is filled with a heat-conducting medium. The ends of the silicon carbide heat collecting tube 3 and the quartz heating tube 2 are respectively fixed and encapsulated by the ceramic heat-insulating fixing base 4, leaving the middle portion of the silicon carbide heat collecting tube 3 exposed to the outside. The graphene heating resistor 1 adopts a patterned design and is built into the quartz heating tube 2. It is heat-fused together with the quartz heating tube 2 and generates heat when powered. After the quartz heating tube 2 is formed, it is necessary to evacuate the inside of the quartz heating tube 2 and then fill it with nitrogen or an inert gas so that the graphene heating resistor 1 will not be oxidized after it is energized to generate heat. The quartz heating tube 2 adopts a long straight tube structure, and the graphene heating resistor 1 adopts a long strip shape. The two ends of the graphene heating resistor are connected to the electrode sheet, and the electrode sheet is heat-fused into the flat structure at the end of the quartz heating tube 2. The silicon carbide heat collecting tube 3 adopts a circular tube shape, and its diameter is larger than the diameter of the quartz heating tube 2, so that the quartz heating tube 2 can be placed in the silicon carbide heat collecting tube 3, and a gap is retained between the quartz heating tube 2 and the silicon carbide heat collecting tube 3. The gap is used to fill the heat-conducting medium, so that the heat can quickly reach the silicon carbide heat collecting tube 3.

[0022] Both ends of the quartz heating tube 2 are flat structures, and both ends of the graphene heating resistor 1 are connected to the outside through electrode sheets passing through the flat structures at both ends of the quartz heating tube 2.

[0023] The ceramic heat-insulating mounting base 4 is a cap-shaped structure with two parallel clamping blocks inside. The flat structure of the quartz heating tube 2 is inserted between the two clamping blocks, thereby being fixedly clamped by the clamping blocks. The clamping blocks can fix the ends of the quartz heating tube 2, ensuring that the quartz heating tube 2 is connected to the center of the ceramic heat-insulating mounting base 4. The ceramic heat-insulating mounting base 4 is made of ceramic material, which has excellent thermal insulation properties to prevent heat loss. It also has good insulation effect, ensuring electrical safety.

[0024] A lead-out hole is also provided on the ceramic heat-insulating fixing seat 4 between the two clamping blocks for leading out the electrode sheet or the wire connected to the electrode sheet.

[0025] The end of the silicon carbide heat collecting tube 3 is inserted into the ceramic heat insulating fixing seat 4 , and the ceramic heat insulating fixing seat 4 and the end of the silicon carbide heat collecting tube 3 are sealed and connected by heat-resistant glue.

[0026] The heat transfer medium is nitrogen, thermal oil, deionized water, or air. Nitrogen and air are primarily used in scenarios requiring rapid heating, while thermal oil and deionized water are primarily used in environments requiring continuous, stable heating.

[0027] Two ceramic heat-insulating mounting bases 4 are each provided with a medium port, one of which serves as an inlet for the heat-conducting medium, and the other as an outlet for the heat-conducting medium. The present invention also provides a method for regulating the operating temperature of a graphene heating pipe, comprising: detecting the surface temperature of a silicon carbide heat-collecting pipe 3, determining whether it exceeds a threshold, and if so, opening the heat-conducting medium inlet and outlet, driving the heat-conducting medium to flow through the silicon carbide heat-collecting pipe 3, thereby slowly lowering the temperature of the graphene heating pipe.

[0028] Open the heat transfer medium inlet and the heat transfer medium outlet, and allow the heat transfer medium to enter the silicon carbide heat collecting tube 3 from the heat transfer medium inlet, then pass through the gap between the silicon carbide heat collecting tube 3 and the quartz heating tube 2, and be discharged through the heat transfer medium outlet.

[0029] The material of the quartz heating tube 2 is quartz, the material of the silicon carbide heat collecting tube 3 is silicon carbide, and the thermal conductivity λ1 of quartz is higher than the thermal conductivity λ2 of silicon carbide. The thickness d of the quartz heating tube 2 is smaller than the thickness D of the silicon carbide heat collecting tube 3, and at the same time, the following conditions are met: λ2*R 2 / D<λ1*r 2 / d<2λ2*R 2 / D; Here r is the radius of the quartz heating tube 2, and R is the radius of the silicon carbide heat collecting tube 3; this makes the efficiency of heat passing through the quartz heating tube 2 higher than the efficiency through the silicon carbide heat collecting tube 3, so that the silicon carbide heat collecting tube 3 has a small degree of heat interception effect.

[0030] The present invention also provides a method for forming a graphene heating pipe, comprising: A quartz heating tube 2 is provided, wherein a graphene heating resistor 1 is encapsulated in the quartz heating tube 2; Provide a silicon carbide heat collecting tube 3, pass the quartz heating tube 2 through the silicon carbide heat collecting tube 3, and arrange it in the center; Provide a ceramic heat-insulating fixing base 4, insert the flat structure at the end of the quartz heating tube 2 into the clamping block of the ceramic heat-insulating fixing base 4, and connect the electrode at the end of the quartz heating tube 2 to the wire, so that the wire passes through the lead-out hole of the ceramic heat-insulating fixing base 4; Heat-resistant glue is applied to the circumference of the end of the silicon carbide heat collecting tube 3 , and then the ceramic heat-insulating fixing seat 4 is connected to the end of the silicon carbide heat collecting tube 3 .

[0031] The graphene heating tube and its forming method provided by the present invention can fully utilize the heat generated by the graphene heating resistor 1 when it is energized, and radiate it to the silicon carbide heat collecting tube 3 through the quartz heating tube 2. The silicon carbide heat collecting tube 3 collects the heat, and the temperature of the silicon carbide heat collecting tube 3 rises under the action of heat storage by the silicon carbide heat collecting tube 3. Compared with the quartz structure used on the outside of conventional graphene heating tubes, the graphene heating tube produced by the present invention adopts the structural characteristics of combining silicon carbide and quartz, which not only ensures the high efficiency of graphene heating, but also accumulates heat on the silicon carbide heat collecting tube 3, so that the operating temperature of the graphene heating tube provided by the present invention is greatly improved than that of conventional graphene heating tubes. Under the same power and voltage input conditions, the graphene heating tube provided by the present application can obtain a higher operating temperature, thereby achieving the effects of energy saving and extending service life.

[0032] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A graphene heating tube, characterized in that: It includes a graphene heating resistor, a quartz heating tube, a silicon carbide heat collecting tube, and a ceramic insulation fixing seat. The graphene heating resistor is longitudinally installed in the quartz heating tube. The quartz heating tube is sealed and vacuumed and then filled with inert gas or nitrogen. The silicon carbide heat collecting tube is sleeved on the outside of the quartz heating tube, and a gap is reserved between the silicon carbide heat collecting tube and the quartz heating tube, and a heat conducting medium is filled in the gap. The two ends of the silicon carbide heat collecting tube and the quartz heating tube are respectively fixed and packaged by the ceramic insulation fixing seat, so that the middle part of the silicon carbide heat collecting tube is exposed to the outside.

2. The graphene heating pipe according to claim 1, characterized in that: Both ends of the quartz heating tube are flat structures, and both ends of the graphene heating resistor are connected to the outside through electrode sheets passing through the flat structures at both ends of the quartz heating tube.

3. The graphene heating pipe according to claim 1, characterized in that: The ceramic heat-insulating fixing seat is a cap-shaped structure, and two parallel clamping blocks are provided inside. The flat structure of the quartz heating tube is inserted between the two clamping blocks, and is thus fixedly clamped by the clamping blocks.

4. The graphene heating pipe according to claim 1, characterized in that: A lead-out hole is also provided on the ceramic heat-insulating fixing seat between the two clamping blocks for leading out the electrode sheet or a wire connected to the electrode sheet.

5. The graphene heating pipe according to claim 1, characterized in that: The end of the silicon carbide heat collecting tube is inserted into the ceramic heat insulating fixing seat, and the ceramic heat insulating fixing seat and the end of the silicon carbide heat collecting tube are sealed and connected by heat-resistant glue.

6. The graphene heating pipe according to claim 1, characterized in that: The heat transfer medium is nitrogen, heat transfer oil, deionized water or air.

7. The graphene heating pipe according to claim 1, characterized in that: Two ceramic heat-insulating fixing seats are respectively provided with medium ports, one of which serves as a heat-conducting medium inlet, and the other serves as a heat-conducting medium outlet.

8. The graphene heating tube according to claim 1, characterized in that: Open the heat transfer medium inlet and outlet, and allow the heat transfer medium to enter the silicon carbide heat collecting tube from the heat transfer medium inlet, then pass through the gap between the silicon carbide heat collecting tube and the quartz heating tube, and be discharged through the heat transfer medium outlet.

9. The graphene heating pipe according to claim 1, characterized in that: The material of the quartz heating tube is quartz, the material of the silicon carbide heat collecting tube is silicon carbide, and the thermal conductivity λ1 of quartz is higher than the thermal conductivity λ2 of silicon carbide. The thickness d of the quartz heating tube is smaller than the thickness D of the silicon carbide heat collecting tube, and at the same time, the following conditions are met: λ2*R 2 / D<λ1*r 2 / d<2λ2*R 2 / D; Where r is the radius of the quartz heating tube and R is the radius of the silicon carbide heat collecting tube.

10. A method for forming a graphene heating pipe, characterized in that: include: Provide quartz heating tubes with graphene heating resistors encapsulated inside; Providing a silicon carbide heat collecting tube, passing the quartz heating tube through the silicon carbide heat collecting tube, and arranging it in the center; Provide a ceramic heat-insulating fixture, insert the flat structure at the end of the quartz heating tube into the clamping block of the ceramic heat-insulating fixture, and connect the electrode at the end of the quartz heating tube to the wire, passing the wire through the lead-out hole of the ceramic heat-insulating fixture; Apply heat-resistant glue to the circumference of the end of the silicon carbide heat collecting tube, and then connect the ceramic heat insulation fixing seat to the end of the silicon carbide heat collecting tube.

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