Carbon fiber segmented heating type far infrared quartz glass heating tube

Abstract

This utility model relates to the field of heating equipment technology, and specifically discloses a segmented carbon fiber far-infrared quartz glass heating tube, highlighting the physical structure and component assembly relationship of the core protected product. The heating tube includes an axially mounted connector lug, a Teflon high-temperature wire, an insulating ceramic tube, a ceramic head adhesive high-temperature adhesive, a molybdenum rod, a red quartz tube, a spring-loaded molybdenum electrode, segmented carbon fiber filaments, and an inner quartz rod. The segmented carbon fiber filaments are wound around the outer circumference of the inner quartz rod, with tightly wound ends forming an auxiliary heating section and a loosely wound middle section forming the main heating section. The spring-loaded molybdenum electrode engages with the filament end to achieve conductivity. The Teflon high-temperature wire is welded to the molybdenum rod via a stainless steel strip. The red quartz tube is a vacuum structure with both ends closed. The insulating ceramic tube is sleeved on the outside of the conductive connection section, and the ceramic head adhesive high-temperature adhesive fills the gaps to achieve a seal. This utility model solves the problems of uneven power distribution, loose connections, and safety hazards associated with traditional heating tubes through optimized structure.

Description

Technical Field

[0001] This utility model relates to the field of heating equipment technology, and in particular to a carbon fiber segmented heating far-infrared quartz glass heating tube. Background Technology

[0002] As a core component for energy conversion, heating elements are widely used in industrial drying (such as plastic shaping and leather dehydration), medical physiotherapy (such as far-infrared heat therapy instruments), and home heating (such as wall-mounted heaters). Their performance depends on the rationality of component construction and assembly stability. Currently, traditional heating elements have obvious defects in their structural design, making it difficult to meet the requirements of high-demand scenarios.

[0003] The filament structure leads to uneven power distribution: Traditional heating tubes mostly use a uniform winding structure without segmented differentiation. Due to the influence of electrode conductivity, the current density at both ends of the filament is low, which easily leads to overheating in the middle and power attenuation at the ends.

[0004] Insufficient stability of conductive connection structure: The conductive connection of traditional heating tubes mostly adopts bolt fixing or simple welding structure. Bolt fixing is prone to loosening after thermal expansion and contraction at high temperature, and simple welding is prone to cracking due to stress concentration. Both can lead to poor contact, arcing or even power failure, which not only affects heating stability, but also poses safety hazards and cannot meet the structural requirements for long-term high temperature operation.

[0005] Defects in the sealing and protection structure of quartz tubes: Some heating tubes have only a simple tubular structure without a targeted sealing structure, or the sealing method used has poor high temperature resistance. After long-term use, the seal is prone to failure, and external oxygen enters the tube, causing filament oxidation. At the same time, there is no effective protective structure at the connection between the quartz tube and external components, and dust and moisture can easily enter, shortening the life of the heating tube.

[0006] In summary, the structural defects of existing heating tubes result in poor power uniformity, unstable connections, short lifespan, and low safety. There is an urgent need to design a new type of heating tube that balances power uniformity, structural stability, safety, and durability by optimizing component structure and assembly relationships to meet the application needs of various fields. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a carbon fiber segmented heating far-infrared quartz glass heating tube, which solves the technical problems of uneven power distribution, easy loosening of conductive connection structure, and insufficient sealing and insulation performance caused by the simple filament structure of traditional heating tubes, as well as the safety hazards and short service life.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] The carbon fiber segmented heating far-infrared quartz glass heating tube includes a Teflon high-temperature wire, an insulating ceramic tube, a ceramic head bonding high-temperature adhesive, a molybdenum rod, a red quartz tube, a molybdenum sheet, a spring molybdenum electrode, a segmented carbon fiber filament, and an inner quartz rod, which are assembled sequentially along the axial direction.

[0010] The segmented carbon fiber filament is a single integrated spiral structure, wound around the outer periphery of the inner quartz rod, with its two ends being tightly wound auxiliary heating sections and the middle being a non-tightly wound main heating section.

[0011] The spring molybdenum electrode is of two types, which respectively engage with the two auxiliary heating sections of the segmented carbon fiber filament, and the spring molybdenum electrode is electrically connected to the molybdenum rod;

[0012] The head of the Teflon high-temperature wire is fixed with an annular stainless steel strip, which is welded to the molybdenum rod to form a whole.

[0013] The red quartz tube is a tubular structure with closed ends, forming a vacuum chamber inside. The vacuum degree of the vacuum chamber is 102 Pa to 10-3 Pa. The exhaust pipe of the red quartz tube is sealed by a fusion sealing structure.

[0014] The red quartz tube has a silica purity of 99.9%, the heating tube has a thermal efficiency of 95% ± 1%, and a continuous working life of 6000-8000 hours.

[0015] Preferably, the two auxiliary heating sections of the segmented carbon fiber filament are both 36mm long, the main heating section is 500mm long, and the outer diameter of the red quartz tube is 12mm.

[0016] Preferably, the insulating ceramic tube is made of alumina ceramic and is sleeved on the outside of the connection section between the Teflon high-temperature wire and the molybdenum rod, and the length of the insulating ceramic tube is 50-60mm.

[0017] Preferably, the thickness of the molybdenum sheet is 1-1.5 mm, and the inner edge of the molybdenum sheet is rounded (rounded radius 0.2-0.3 mm) to avoid scratching the spring molybdenum electrode.

[0018] Preferably, it also includes two insulating ceramic tubes, which are respectively sleeved in the middle of two Teflon high-temperature wires, and the outer diameter of the insulating ceramic tubes is adapted to the inner diameter of the high-temperature adhesive for bonding the ceramic heads.

[0019] Preferably, the outer diameter of the Teflon high-temperature wire is 4-5mm, the thickness of the stainless steel strip is 0.8-1mm, and the inner diameter of the stainless steel strip is the same as the outer diameter of the Teflon high-temperature wire.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The copper-plated tin-plated lugs offer both conductivity and corrosion resistance. The standardized hole design is compatible with conventional external equipment terminals, allowing for quick installation without additional processing. The 10MPa crimping structure ensures a contact resistance of ≤5mΩ, avoiding the poor contact problems of traditional spiral connections. This improves assembly efficiency, ensures stable current transmission, and reduces line loss.

[0022] By using a segmented carbon fiber filament with tightly wound ends and a loosely wound middle section, power can be distributed on demand without relying on complex control circuits. This makes it suitable for heating needs in various scenarios such as industrial drying and medical therapy. The structure is simple and highly reliable, avoiding power runaway problems caused by electronic component failures.

[0023] The spring molybdenum electrode adopts a spiral interlocking structure, which uses the elastic deformation of the spring itself to offset the component deformation caused by thermal expansion and contraction during the operation of the heating tube. This avoids the contact loosening and desoldering problems that are prone to occur in traditional fixed connection structures, significantly improves the stability of the conductive connection, and extends the service life of the heating tube.

[0024] The physical isolation structure of the insulating ceramic tube and the sealing structure of the high-temperature adhesive bonding the ceramic head form a double safety protection. The insulating ceramic tube blocks the leakage path, and the high-temperature adhesive prevents external impurities from entering, so that the heating tube meets industrial safety standards and can be used stably in harsh environments such as humid and dusty environments. Attached Figure Description

[0025] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0026] Figure 1 This is an overall structural diagram of the present invention.

[0027] Illustrations: 1. Connector lug; 2. Teflon high-temperature wire; 3. Insulating ceramic tube; 4. High-temperature adhesive for ceramic head bonding; 5. Molybdenum rod; 6. Red quartz tube; 7. Spring molybdenum electrode; 8. Segmented carbon fiber filament; 9. Inner quartz rod. Detailed Implementation

[0028] This application provides a carbon fiber segmented heating far-infrared quartz glass heating tube, which solves the technical problems of uneven power distribution, easy loosening of conductive connection structure, and insufficient sealing and insulation performance caused by the single filament structure of traditional heating tubes, as well as the safety hazards and short service life.

[0029] Example

[0030] like Figure 1 As shown, the overall technical solution in this application embodiment is as follows:

[0031] To address the problems existing in the prior art, this utility model provides a carbon fiber segmented heating far-infrared quartz glass heating tube, which is suitable for industrial drying, medical physiotherapy, home heating and other scenarios with high requirements for heating power uniformity, structural stability and safety performance.

[0032] Segmented carbon fiber filament 8: This is the core heating component of the heating tube. It is made of continuous carbon fiber filament with a diameter of 0.12mm and a tensile strength ≥3500MPa. It has a spiral wound structure, tightly wound around the outer circumference of the inner quartz rod 9, and is coaxially aligned with the inner quartz rod 9 to ensure uniform heating and avoid localized heat concentration. The filament is clearly divided into three segments along the axial direction:

[0033] The two ends are auxiliary heating sections, each 36mm long, manufactured using a close-wound method with a winding spacing controlled at 0.2mm and a winding density of 15 turns / cm. The middle section is the main heating section, 500mm long, manufactured using a non-close-wound method with a winding spacing of 0.5mm and a winding density of 5 turns / cm. Through the differentiated physical structure of close-wound and non-close-wound sections, the problems of power attenuation at both ends and overheating in the middle of traditional filaments can be solved without additional control components, achieving power distribution on demand. The inner quartz rod 9, which works in conjunction with the filament, is cylindrical with a diameter of 8mm and a length of 572mm. Its material is the same as that of the red quartz tube 6. In addition to supporting the segmented carbon fiber filament 8 and preventing filament deformation, it can also evenly distribute the localized high temperature generated by the segmented carbon fiber filament 8 throughout the tube through physical heat conduction, preventing the red quartz tube 6 from cracking due to localized overheating.

[0034] Spring molybdenum electrodes 7: Two electrodes are used, made of molybdenum alloy with a purity of ≥99.95% and a high temperature resistance of ≥2600℃. They are shaped like spiral springs, with an inner diameter of 3mm and a length of 15mm. Each spring molybdenum electrode 7 engages with the ends of the two auxiliary heating sections of the segmented carbon fiber filament 8. Utilizing the elastic pressure of the spring itself, the electrode and filament maintain a tight contact at all times, effectively avoiding the contact loosening problems that easily occur after thermal expansion and contraction in traditional bolt-fixed or simple welded structures, ensuring a continuous and stable electrical path.

[0035] Molybdenum rods 5: There are two rods, cylindrical in shape, 4mm in diameter and 60mm in length. One end is fixed to the spring molybdenum electrode 7 by welding, with no obvious gaps at the weld to ensure an uninterrupted electrical path. The other end extends out of the red quartz tube 6, with a length controlled to 30mm, for easy connection to subsequent components. The extended end of the molybdenum rod 5 is connected to a stainless steel strip, which is a ring structure with a thickness of 0.9mm, an inner diameter of 4mm, and an outer diameter of 6mm. Its inner ring is fixed to the head of the Teflon high-temperature wire 2 (with 5mm of insulation stripped beforehand) by crimping, while the outer ring is fused to the extended end of the molybdenum rod 5 by spot welding. After fusion, there are no obvious protrusions on the surface, ensuring compatibility with the insulating ceramic tube 3.

[0036] Teflon high-temperature wire 2: Quantity: 2 pieces, outer diameter: 4.5mm, insulation temperature resistance: ≥260℃, total length: 150mm. The end of the wire furthest from the molybdenum rod 5 is crimped with a lug 1. The lug 1 is made of tin-plated copper, 1.2mm thick, with a 6mm diameter hole. Its inner ring is tightly crimped with the Teflon high-temperature wire 2 without any looseness, and the contact resistance is ≤5mΩ. The outer ring is used for connecting external power lines, facilitating the installation and connection of the heating element with the equipment.

[0037] The quartz tube assembly serves as the high-temperature resistant carrier and vacuum-sealing core of the heating tube. Through specific morphology and assembly design, it achieves the functions of isolating oxygen and protecting the filament. The red quartz tube 6 has a tubular structure with an outer diameter of 12mm, a length of 588mm, and a wall thickness of 1.5mm. Its silica purity reaches 99.9%, with impurity content ≤10ppm. The tube surface is coated with a 0.05mm thick high-temperature resistant holmium oxide coating, which filters out unwanted short-wave infrared radiation and improves far-infrared radiation efficiency. Both ends of the tube are sealed, forming an internal vacuum chamber. The vacuum level is stably maintained at 10⁻²-10⁻³ Pa. An exhaust pipe with a diameter of 5mm and a length of 20mm is located on one side of the tube. A fusion-sealing structure achieves a tight seal, with no leakage traces at the fusion seal. After a 24-hour pressure test, the vacuum level showed no significant change, completely isolating external oxygen and preventing oxidation and failure of the segmented carbon fiber filament 8. On the inner sides of both ends of the red quartz tube 6, there is a molybdenum sheet. The molybdenum sheet has a ring-shaped thin sheet structure with a thickness of 1.2 mm, an outer diameter of 11.9 mm, and an inner diameter of 3.1 mm. The outer diameter of the molybdenum sheet is clearance-fitted with the inner diameter of the red quartz tube 6 with a clearance of 0.05 mm for easy assembly. The inner diameter is interference-fitted with the outer diameter of the spring molybdenum electrode 7 with an interference of 0.025 mm to ensure that the spring molybdenum electrode 7 is fixed in position inside the tube. At the same time, the molybdenum sheet itself has insulating properties, which can achieve insulation isolation between the electrode and the quartz tube and avoid the risk of electrical breakdown.

[0038] Insulating ceramic tube 3: There are 2 tubes, made of alumina ceramic material with a temperature resistance of ≥1600℃ and an insulation resistance of ≥100MΩ. They are tubular in shape, with a wall thickness of 2.5mm and a length of 55mm. Each insulating ceramic tube 3 is respectively sleeved on the outside of the connection section between the Teflon high-temperature wire 2 and the molybdenum rod 5. The inner wall is tightly fitted to the outer wall of the Teflon high-temperature wire 2 and the molybdenum rod 5, with a fitting gap of ≤0.1mm. Through physical isolation, it prevents conductive parts from contacting the outside environment and avoids leakage accidents.

[0039] High-temperature adhesive 4 for bonding ceramic heads: 2 parts are used to fill the gap between the ends of the insulating ceramic tube 3 and the red quartz tube 6, with a filling thickness of 5mm. During the filling process, ensure no air bubbles remain. After the adhesive layer cures at room temperature for 24 hours, a stable sealing structure is formed, with a bonding strength ≥2MPa and a temperature resistance ≥300℃. This not only fixes the relative position of the insulating ceramic tube 3 and the red quartz tube 6 but also prevents external dust and moisture from entering the tube, further improving the structural sealing performance.

[0040] The connector lug 1 is the connection component between the heating element and the external power supply line. There are two lugs, each corresponding to one of the two Teflon high-temperature wires 2. It is made of tin-plated copper. The copper substrate ensures excellent conductivity, and the tin plating prevents oxidation and corrosion, extending the service life of the connection. The connector lug 1 has a composite structure of sheet and hole, with a thickness of 1-1.5mm. A circular mounting hole with a diameter of 5-7mm is opened in the center. The inner wall of the mounting hole is smooth and burr-free, facilitating fixing to the wiring terminals of external equipment with bolts.

[0041] One end of the connector lug 1 is a crimping end. The inner ring size is adapted to the outer diameter of the Teflon high-temperature wire 2. Using a special crimping tool, 8-12MPa pressure is applied to crimp and fix the end of the wire 2 away from the molybdenum rod 5. After crimping, the two fit tightly without loosening, and the contact resistance is ≤5mΩ, ensuring stable current transmission and avoiding local heating due to poor contact.

[0042] Overall assembly process:

[0043] Step 1:

[0044] First, fix the inner quartz rod 9 onto a special tooling fixture, ensuring that the inner quartz rod 9 remains horizontal. Then, spirally wind the segmented carbon fiber filament 8 around the outer circumference of the inner quartz rod 9 with a diameter of 36mm at both ends and a diameter of 500mm in the middle. During the winding process, control the tension at 5N to avoid uneven heating due to excessive filament looseness or filament breakage due to excessive tightness. After winding, engage the two spring molybdenum electrodes 7 with the two auxiliary heating sections of the segmented carbon fiber filament 8, and then place the two molybdenum sheets on the outside of the spring molybdenum electrodes 7 to complete the assembly of the core heating unit (inner quartz rod 9 + segmented carbon fiber filament 8 + spring molybdenum electrodes 7 + molybdenum sheets). After assembly, ensure that the coaxiality of each component is ≤0.1mm to ensure the accuracy of subsequent assembly.

[0045] Step 2:

[0046] The pre-assembled core heating unit is slowly inserted into the red quartz tube 6. During insertion, the position of the heating unit is adjusted so that the molybdenum plates at both ends are tightly fitted to the inner sides of the two ends of the red quartz tube 6 without significant displacement. Then, using a special welding device, one end of the molybdenum rod 5 is welded and fixed to the spring molybdenum electrode 7. During welding, it is ensured that there are no burrs or incomplete welds at the weld joint to ensure a continuous electrical path. After welding, it is confirmed that the other end of the molybdenum rod 5 extends out of the red quartz tube 6, with the extension length controlled to 30mm, leaving space for subsequent connection with wires.

[0047] Step 3:

[0048] At the part of the molybdenum rod 5 that extends out of the red quartz tube 6, an insulating ceramic tube 3 is fitted, with one end of the insulating ceramic tube 3 close to the end of the red quartz tube 6 and the other end completely covering the connection section between the molybdenum rod 5 and the stainless steel strip, with a coverage length ≥20mm; then, the gap between the end of the insulating ceramic tube 3 and the end of the red quartz tube 6 is filled with ceramic head bonding high-temperature adhesive 4. During the filling process, it is ensured that the adhesive layer is uniform and free of air bubbles. After filling, the whole thing is placed in a room temperature environment and left to stand for 24 hours to allow the adhesive layer to fully cure. After curing, the adhesive layer is checked to ensure that there are no cracks or peeling, thus ensuring the insulation and sealing effect.

[0049] Step 4:

[0050] Align the inner ring of the stainless steel strip with the head of the Teflon high-temperature wire 2 (with 5mm of insulation stripped beforehand), and use a crimping tool to crimp and fix it. Control the pressure during crimping at 10MPa to ensure that the steel strip and the wire are tightly connected without loosening. After crimping, fuse the outer ring of the stainless steel strip with the protruding end of the molybdenum rod 5 by spot welding. After fusion, grind the surface smooth to avoid protrusions affecting the assembly of the insulating ceramic tube 3. Finally, crimp the terminal lug 1 at the end of the Teflon high-temperature wire 2 away from the molybdenum rod 5. The crimping pressure is also controlled at 10MPa to ensure a stable connection between the terminal lug and the wire. This completes the overall assembly of the heating tube. The final total length of the product (including the terminal lug 1) is controlled at 788mm, which meets the installation size requirements of conventional equipment.

[0051] The following are actual product examples conforming to the structural design of this utility model. Through physical performance testing, it has been verified that their structural stability and performance meet the design requirements:

[0052] The segmented carbon fiber filament 8 uses 0.12mm diameter carbon fiber filaments. The auxiliary heating section is 36mm long and has a tightly wound structure, while the main heating section is 500mm long and has a loose structure. During assembly, it is coaxially wound with the inner quartz rod 9 without any loosening. Actual measurements show that the filament has a uniform power distribution, with a power difference of ≤5% between the ends and the middle, solving the problem of uneven power distribution in traditional filaments. The red quartz tube 6 has an outer diameter of 12mm, a length of 588mm, and a wall thickness of 1.5mm. The internal vacuum degree is stable at 5×10-3Pa. Both ends are sealed with no leakage at the fusion seal. In the thermal shock resistance test, it can withstand a sudden cooling and heating shock of 200℃ without cracking or deformation. The insulating ceramic tube 3 is an alumina ceramic tube with a wall thickness of 2.5mm and a length of 55mm. During assembly, the gap between it and the Teflon high-temperature wire 2 and the molybdenum rod 5 is ≤0.1mm. The measured insulation resistance is 120MΩ, with no leakage. The connector lug 1 is made of tin-plated copper, 1.2mm thick, with a 6mm diameter hole. It is tightly crimped with the Teflon high-temperature wire 2 without any looseness. The measured contact resistance is 4mΩ, and the conductivity is stable. The overall product length is 788mm, and the measured thermal efficiency is 95.3%. After 7200 hours of continuous operation testing, no components showed deformation or loosening, demonstrating excellent structural stability.

[0053] By using the physical structure of segmented carbon fiber filament 8 with tightly wound ends and loosely wound middle, power can be distributed on demand without relying on complex control circuits. This adapts to the heating needs of different scenarios such as industrial drying and medical therapy. The structure is simple and highly reliable, avoiding power runaway problems caused by electronic component failures.

[0054] The spring molybdenum electrode 7 adopts a spiral interlocking structure, which uses the elastic deformation of the spring itself to offset the component deformation caused by thermal expansion and contraction during the operation of the heating tube. This avoids the contact loosening and desoldering problems that are prone to occur in traditional fixed connection structures, significantly improves the stability of the conductive connection, and extends the service life of the heating tube.

[0055] The physical isolation structure of the insulating ceramic tube 3 and the sealing structure of the high-temperature adhesive 4 for bonding the ceramic head form a double safety protection. The insulating ceramic tube 3 blocks the leakage path, and the high-temperature adhesive prevents external impurities from entering, so that the heating tube meets industrial safety standards and can be used stably in harsh environments such as humid and dusty environments.

[0056] Each component is designed according to the construction logic of pre-assembly + step-by-step docking. The assembly process is simple and easy to understand, and assembly can be completed without the need for professional and complicated equipment. During subsequent use, if a component (such as wires or electrodes) is damaged, it can be disassembled and replaced accordingly without scrapping the entire heating tube, which greatly reduces the cost of use and maintenance.

[0057] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A carbon fiber segmented heating far-infrared quartz glass heating tube, characterized in that, It includes a wiring lug (1), a Teflon high-temperature wire (2), an insulating ceramic tube (3), a ceramic head adhesive high-temperature adhesive (4), a molybdenum rod (5), a red quartz tube (6), a molybdenum sheet, a spring molybdenum electrode (7), a segmented carbon fiber filament (8), and an inner quartz rod (9) assembled sequentially along the axial direction. The segmented carbon fiber filament (8) is a single integrated spiral structure, wound around the outer periphery of the inner quartz rod (9), with its two ends being tightly wound auxiliary heating sections and the middle part being a non-tightly wound main heating section; There are two spring molybdenum electrodes (7), which respectively engage with the two auxiliary heating sections of the segmented carbon fiber filament (8), and the spring molybdenum electrodes (7) are electrically connected to the molybdenum rod (5); The head of the Teflon high-temperature wire (2) is fixed with an annular stainless steel strip, which is welded to the molybdenum rod (5) to form a whole. The red quartz tube (6) is a tubular structure with closed ends, forming a vacuum cavity inside. The exhaust pipe of the red quartz tube (6) is sealed by a fusion sealing structure. The connector lug (1) is assembled on the end of the Teflon high-temperature wire (2) away from the molybdenum rod (5), and is made of tin-plated copper. It is crimped and fixed to the Teflon high-temperature wire (2).

2. The carbon fiber segmented heating far-infrared quartz glass heating tube as described in claim 1, characterized in that, The segmented carbon fiber filament (8) has two auxiliary heating sections with a length of 36 mm each, a main heating section with a length of 500 mm, and an outer diameter of 12 mm for the red quartz tube (6).

3. The carbon fiber segmented heating far-infrared quartz glass heating tube as described in claim 1, characterized in that, The insulating ceramic tube (3) is made of alumina ceramic and is sleeved on the outside of the connection section between the Teflon high-temperature wire (2) and the molybdenum rod (5). The length of the insulating ceramic tube (3) is 50-60mm.

4. The carbon fiber segmented heating far-infrared quartz glass heating tube as described in claim 1, characterized in that, The thickness of the molybdenum sheet is 1-1.5 mm, and the inner edge of the molybdenum sheet is rounded.

5. The carbon fiber segmented heating far-infrared quartz glass heating tube as described in claim 1, characterized in that, It also includes two insulating porcelain tubes (3), which are respectively fitted in the middle of two Teflon high-temperature wires (2), and the outer diameter of the insulating porcelain tubes (3) is matched with the inner diameter of the high-temperature adhesive (4) for bonding the porcelain head.

6. The carbon fiber segmented heating far-infrared quartz glass heating tube as described in claim 1, characterized in that, The outer diameter of the Teflon high-temperature wire (2) is 4-5mm, the thickness of the stainless steel strip is 0.8-1mm, and the inner diameter of the stainless steel strip is the same as the outer diameter of the Teflon high-temperature wire (2).

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