Armoured heat pipe assembly

Abstract

The utility model discloses a kind of armored heating tube assemblies, including armored heating tube and armored lead-out wire, the armored heating tube has heating wire arranged around axis, the armored lead-out wire has conductive wire arranged along axis, further including metal fixing seat for connecting the armored heating tube with armored lead-out wire, the inside of the fixing seat is provided with axial through cavity, the end of the armored heating tube and armored lead-out wire is respectively inserted and fixed in the cavity two ends of the fixing seat, the heating wire of the armored heating tube and the conductive wire of armored lead-out wire butt joint and form electrical connection on the axis in the cavity of the fixing seat, and the cavity in the fixing seat is filled with insulating heat-conducting material.This application has the advantages of reliable connection, high mechanical strength, good sealing performance, superior electrical performance, strong adaptability, compact structure, easy integration, etc., especially suitable for high temperature, vibration and other harsh environments under electric heating system.

Description

Technical Field

[0001] This utility model relates to the technical field of electric heating, specifically to an armored heating tube assembly. Background Technology

[0002] Armored heating elements, also known as metal-armored heating tubes, are widely used in industrial heating, household appliances, aerospace, and other fields due to their robust structure, high power density, high temperature resistance, and corrosion resistance. A typical structure consists of one or more heating wires arranged axially within a metal sheath, with the gap between the sheath and the heating wires tightly filled with insulating and thermally conductive materials such as magnesium oxide powder.

[0003] In practical applications, armored heating elements need to be connected to an external power source via lead wires. Currently, the common practice is to directly connect flexible wires to the end electrodes of the heating element using terminals or crimping. These methods have several drawbacks: Poor mechanical strength: The joints are relatively weak and are prone to loosening or breaking under vibration or frequent bending conditions; Poor sealing: Connection points are exposed to the environment and are easily corroded by moisture and corrosive gases, leading to decreased insulation performance or short circuits; Limited high-temperature resistance: The temperature resistance of the insulation layer and terminals of ordinary flexible wires may be lower than that of the heating element itself, which limits its use in high-temperature environments; Not suitable for compact spaces: When multiple heating elements need to be densely arranged in a small space, traditional wiring methods take up a lot of space and are difficult to wire.

[0004] Furthermore, in some designs, for ease of wiring and overall structural robustness, it is desirable to use armored conductors. However, the diameters of the heating element and the conductors may differ depending on design requirements. Achieving a robust, insulated, and conductive connection between two armored components of different diameters becomes a technical challenge. Directly welding two metal sheaths of different diameters is not only technically difficult but also easily damages the internal insulation material and heating element. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to provide an armored heating tube assembly that can achieve a firm, insulated, and conductive connection between armored heating tubes of different diameters and armored lead wires.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: an armored heating tube assembly, including an armored heating tube and an armored lead wire. The armored heating tube includes a heating wire arranged around an axis, a metal sheath fitted over the heating wire, and an insulating thermally conductive material filled between the heating wire and the metal sheath. The armored lead wire includes a conductive wire arranged along an axis, a metal wire sheath fitted over the conductive wire, and an insulating thermally conductive material filled between the conductive wire and the metal wire sheath. It also includes a metal fixing seat for connecting the armored heating tube and the armored lead wire. The fixing seat has an axially penetrating cavity inside. The ends of the armored heating tube and the armored lead wire are respectively inserted into and fixed at both ends of the cavity of the fixing seat. The heating wire of the armored heating tube and the conductive wire of the armored lead wire are connected and electrically joined on the axis within the cavity of the fixing seat. The cavity of the fixing seat is filled with an insulating thermally conductive material.

[0007] Preferably, the armored heating tube and the armored lead wire have different diameters, and the cavity of the fixing base is formed with mounting holes at both ends that are adapted to the diameters of the armored heating tube and the armored lead wire.

[0008] Furthermore, the mounting hole is sealed to the armored heating wire and the armored lead wire by interference fit or welding.

[0009] Preferably, the heating wire of the armored heating tube and the conductive wire of the armored lead wire are aligned and welded together within the cavity of the fixing base.

[0010] Preferably, the mounting base is made of stainless steel, copper, or a high-temperature alloy.

[0011] Preferably, the insulating and thermally conductive material is magnesium oxide powder.

[0012] The main technical effects of this utility model are reflected in the following aspects: (1) Reliable connection and high mechanical strength. The armored heating tube and the armored lead wire are mechanically connected together by the metal fixing seat, forming a rigid integral structure that can effectively resist vibration and impact, avoiding the problem of easy loosening and breakage of traditional flexible connection; (2) Good sealing performance. The fixing seat and the armored heating tube and the armored lead wire can be sealed by interference fit or welding. Combined with the magnesium oxide powder filled inside, the entire connection structure is isolated from the external environment, which has good moisture-proof and corrosion-proof capabilities and is suitable for harsh working conditions; (3) Electric Superior gas performance: The internal electrical connection points are sealed in a fixed seat filled with insulating material, eliminating the risk of short circuits caused by environmental factors. The connection is made by welding, resulting in low contact resistance, low heat generation, and high efficiency. (4) Strong adaptability: It cleverly solves the connection problem between armored components of different diameters through a fixed seat. The design is flexible, and the hole diameters at both ends of the fixed seat can be designed according to needs, making it compatible with heating tubes and lead wires of various specifications. (5) Compact structure, easy to integrate: The entire connection structure has a regular shape and small size, making it particularly suitable for the layout and installation of multiple heating units in space-constrained equipment, simplifying the overall assembly process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0014] 1-Armored heating element; 11-Heating wire; 12-Metal sheath; 2-Armored lead wire; 21-Conductive wire; 22-Metal wire sheath; 3-Fixing base; 4-Insulating thermal conductive material. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered. Example

[0016] according to Figure 1-2As shown, an armored heating element assembly includes an armored heating element 1 and an armored lead wire 2. The armored heating element 1 includes a heating wire 11 arranged around an axis, a metal sheath 12 fitted over the heating wire 11, and an insulating thermally conductive material 4 filled between the heating wire 11 and the metal sheath 12. The armored lead wire 2 includes a conductive wire 21 arranged along an axis, a metal wire sheath 22 fitted over the conductive wire 21, and an insulating thermally conductive material 4 filled between the conductive wire 21 and the metal wire sheath 22. It also includes a metal mounting base 3 for connecting the armored heating element 1 and the armored lead wire 2. The fixing base 3 is made of stainless steel, copper or high-temperature alloy. The fixing base 3 has an axially penetrating cavity. The ends of the armored heating tube 1 and the armored lead wire 2 are respectively inserted into and fixed at both ends of the cavity of the fixing base 3. The heating wire 11 of the armored heating tube 1 and the conductive wire 21 of the armored lead wire 2 are connected on the axis of the cavity of the fixing base 3 to form an electrical connection. Generally, the heating wire 11 of the armored heating tube 1 and the conductive wire 21 of the armored lead wire 2 are aligned and welded to be fixed in the cavity of the fixing base 3. The cavity of the fixing base 3 is filled with insulating and heat-conducting material 4.

[0017] The aforementioned insulating and thermally conductive material 4 is magnesium oxide powder.

[0018] The armored heating element 1 and the armored lead wire 2 have different diameters. The cavity of the fixing base 3 has mounting holes at both ends that are adapted to the diameters of the armored heating element 1 and the armored lead wire 2. The mounting holes are sealed with the armored heating wire 11 and the armored lead wire 2 by interference fit, or completely sealed by argon arc welding or laser welding at the junction of the fixing base 3 and the armored heating wire 11 and the armored lead wire 2.

[0019] During assembly, firstly, insert one end of the armored heating tube 1 into one end of the fixing base 3 and press it firmly. Then, insert the end of the armored lead wire 2 into the other end of the fixing base 3 and press it firmly. Next, align the heating wire 11 and the conductive wire 21 inside the cavity of the fixing base 3 and form a strong weld point by welding. Finally, fill the cavity of the fixing base 3 with high-purity magnesium oxide powder using specialized equipment and perform a compaction treatment to ensure there are no gaps inside, achieving optimal insulation and heat conduction effects.

[0020] The beneficial effects of this application are: The connection is reliable and the mechanical strength is high. The armored heating tube 1 and the armored lead wire 2 are mechanically connected together by the metal fixing seat 3, forming a rigid integral structure that can effectively resist vibration and impact, avoiding the problem of loosening and breaking of traditional flexible connections. With good sealing performance, the fixing base 3 can be sealed with the armored heating tube 1 and the armored lead wire 2 by interference fit or welding. Combined with the internal magnesium oxide powder filling, the entire connection structure is isolated from the external environment, with good moisture-proof and corrosion-proof capabilities, and is suitable for harsh working conditions. Superior electrical performance: The internal electrical connection points are sealed in the fixed base 3 filled with insulating material, eliminating the risk of short circuits caused by environmental factors. The connection is made by welding, which has low contact resistance, low heat generation, and high efficiency. It is highly adaptable and cleverly solves the connection problem between armored components of different diameters through a fixed base 3. The design is flexible and the hole diameters at both ends of the fixed base 3 can be designed according to needs, and it is compatible with heating tubes and lead wires of various specifications. With its compact structure and ease of integration, the entire connection structure has a regular shape and small size, making it particularly suitable for arranging and installing multiple heating units in space-constrained equipment, thus simplifying the overall assembly process.

[0021] It is particularly suitable for electric heating systems in harsh environments such as high temperature and vibration.

Claims

1. An armored heating element assembly, comprising an armored heating element and an armored lead wire, wherein the armored heating element has a heating wire arranged around an axis, and the armored lead wire has a conductive wire arranged along the axis, characterized in that: It also includes a metal mounting base for connecting the armored heating tube and the armored lead wire. The mounting base has an axially penetrating cavity inside. The ends of the armored heating tube and the armored lead wire are respectively inserted into and fixed at both ends of the cavity of the mounting base. The heating wire of the armored heating tube and the conductive wire of the armored lead wire are connected on the axis inside the cavity of the mounting base to form an electrical connection. The cavity of the mounting base is filled with insulating and thermally conductive material.

2. The armored heating element assembly according to claim 1, characterized in that: The armored heating tube and the armored lead wire have different diameters, and the cavity of the fixing base is formed with mounting holes at both ends that are adapted to the diameters of the armored heating tube and the armored lead wire.

3. The armored heating element assembly according to claim 2, characterized in that: The mounting hole is sealed to the armored heating wire and the armored lead wire by interference fit or welding.

4. The armored heating element assembly according to claim 1, characterized in that: The heating wire of the armored heating tube and the conductive wire of the armored lead wire are aligned and welded together in the cavity of the fixing base.

5. The armored heating element assembly according to claim 1, characterized in that: The mounting base is made of stainless steel, copper, or a high-temperature alloy.

6. The armored heating element assembly according to claim 1, characterized in that: The insulating and thermally conductive material is magnesium oxide powder.

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