CN210518888U - Double-layer electric heating tube - Google Patents

Abstract

The utility model relates to a double-deck electrothermal tube, include: the steel pipe layer is internally provided with an installation channel; the heating element is arranged in the mounting channel, a sealing cover and a leading-out wire extending out of the sealing cover are arranged in the mounting channel, the heating element comprises a heating wire and a magnesium oxide rod, the magnesium oxide rod is connected with the leading-out wire, the heating wire is connected with the magnesium oxide rod, and the heating element is connected with the leading-out wire; the magnesium oxide rod penetrates through the insulating heat conducting core, and the heating wire is wound on the insulating heat conducting core; the insulating heat conduction powder is filled between the insulating heat conduction core and the steel pipe layer; and the seamless copper pipe layer is wrapped outside the steel pipe layer. The utility model discloses a double-deck electrothermal tube, heat conductivity is strong, and anti-oxidant corrosion resistance is strong, has reduced the harm of incrustation scale, has strengthened the intensity of electrothermal tube, has improved the security of electrothermal tube.

Description

Double-layer electric heating tube

Technical Field

The utility model relates to an electrothermal tube technical field especially relates to a double-deck electrothermal tube.

Background

The electric heating tube is an electrical element for converting electric energy into heat energy, the existing electric heating tube is generally of a single-layer structure, and the shell of the existing electric heating tube is generally made of one of steel, copper or glass.

The ductility of the steel shell is poor, the seamless effect is difficult to achieve, the surface load of the heating pipe is high, water scale is easy to generate, the heat dissipation is easy to influence, the heating time is long, and even heat energy accumulation is caused to break the electric heating pipe.

The glass electric heating tube cannot adapt to temperature difference in north and south areas, is easy to burst due to thermal expansion and cold contraction, and the power is reduced year by year due to rapid aging of a heating film.

Copper is strong in oxidation resistance and corrosion resistance, can reduce the harm of water scale, is greatly superior to stainless steel in heat conduction performance, and meanwhile, the oxygen-free red copper material is strong in ductility and can achieve seamless effect. However, the high price of copper causes the occupancy rate of the copper electric heating tube on the market to be very low; copper is soft and easily deformed, resulting in an inner material that is easily extruded and easily deformed, broken or cracked.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a double-layer electric heating tube with good thermal conductivity.

In order to solve the technical problem, the utility model discloses a technical scheme be: a dual layer electrical heating tube comprising: the steel pipe layer is internally provided with an installation channel; the heating element is arranged in the mounting channel, a sealing cover and a leading-out wire extending out of the sealing cover are arranged in the mounting channel, the heating element comprises a heating wire and a magnesium oxide rod, the magnesium oxide rod is connected with the leading-out wire, the heating wire is connected with the magnesium oxide rod, and the heating element is connected with the leading-out wire; the magnesium oxide rod penetrates through the insulating heat conducting core, and the heating wire is wound on the insulating heat conducting core; the insulating heat conduction powder is filled between the insulating heat conduction core and the steel pipe layer; and the seamless copper pipe layer is wrapped outside the steel pipe layer.

Furthermore, the lead-out wire extending out of the sealing cover is wrapped with an insulating material.

Furthermore, the outgoing line is a pure nickel wire.

Furthermore, the insulating heat conducting core and the insulating heat conducting powder are made of magnesium oxide materials.

Further, the steel pipe layer is made of 304 stainless steel.

Further, the seamless copper tube layer is made of oxygen-free red copper.

Further, the sealing cover is one of mica, ceramic or ceramic glue.

Furthermore, one end of the installation channel is sealed, and the other end of the installation channel is provided with the sealing cover and the outgoing line.

Furthermore, both ends of the mounting channel are provided with the sealing cover and the outgoing line.

The beneficial effects of the utility model reside in that: the shell of the electric heating tube comprises an inner steel tube layer and an outer seamless copper tube layer, the steel tube layer is high in strength and hardness, not prone to deformation, the seamless copper tube layer is high in heat conduction capacity and strong in oxidation resistance and corrosion resistance, and damage of scale is reduced; the double-layer shell greatly enhances the strength of the electric heating tube, can prevent the electric heating tube from explosion and cracking and improves the safety of the electric heating tube; the seamless copper pipe layer is mainly used for heat conduction, the steel pipe layer is used as a support, the thickness of the seamless copper pipe layer can be greatly reduced, the use of copper materials is reduced, and the production cost is saved.

Drawings

FIG. 1 is a schematic structural view of a double-layered electric heating tube according to an embodiment of the present invention;

fig. 2 is a schematic view of an external structure of a double-layer electric heating tube according to an embodiment of the present invention.

Description of reference numerals:

10. a seamless copper pipe layer; 20. a steel pipe layer; 31. a magnesium oxide rod; 32. a heater;

40. an insulating heat-conducting core; 50. insulating heat-conducting powder; 60. sealing the cover; 70. and (6) leading out wires.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following description will be made in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1-2, a dual-layer electric heating tube includes: the steel pipe layer 20, the steel pipe layer 20 has installation channels; the heating element is arranged in the mounting channel, the sealing cover 60 and the outgoing line 70 extending out of the sealing cover 60 are arranged in the mounting channel, the heating element comprises a heating wire 32 and a magnesium oxide rod 31, the magnesium oxide rod 31 is connected with the outgoing line 70, the heating wire 32 is connected with the magnesium oxide rod 31, and the heating element is connected with the outgoing line 70; the insulating heat conducting core 40, the magnesia stick 31 is arranged in the insulating heat conducting core 40 in a penetrating way, and the heating wire 32 is wound on the insulating heat conducting core 40; the insulating heat conduction powder 50 is filled between the insulating heat conduction core 40 and the steel pipe layer 20; and the seamless copper pipe layer 10 is wrapped outside the steel pipe layer 20.

The shell of the electric heating tube comprises an inner steel tube layer 20 and an outer seamless copper tube layer 10, the steel tube layer 20 is high in strength and hardness and not prone to deformation, the seamless copper tube layer 10 is high in heat conduction capability and strong in oxidation resistance and corrosion resistance, and damage of scale is reduced; the double-layer shell greatly enhances the strength of the electric heating tube, can prevent the electric heating tube from explosion and cracking and improves the safety of the electric heating tube; the seamless copper pipe layer 10 is mainly used for heat conduction, and the steel pipe layer 20 is used for supporting, so that the thickness of the seamless copper pipe layer 10 can be greatly reduced, the use of copper materials is reduced, and the production cost is saved. The magnesium oxide rod 31 penetrates through the insulating heat conducting core 40, and the insulating heat conducting core 40 is wound with the nickel-chromium coil, so that the stability of the heating element is enhanced, and the magnesium oxide rod 31 and the insulating heat conducting core 40 are prevented from being deformed greatly to cause fracture.

Preferably, the magnesium oxide rod 31 is a high-purity magnesium oxide rod 31, and generally, seawater purification can be used to improve the purity of magnesium oxide. Preferably, the heating wire 32 is made of nickel-chromium material, and the nickel-chromium material has no electromagnetism, has stable physical properties, and can bear high temperature.

Preferably, the lead wires 70 extending out of the cover 60 are wrapped with an insulating material.

The safety performance is improved. Generally, the wrapping material of the lead wire 70 is woven of mica or ceramic fiber.

Preferably, the lead wire 70 is a pure nickel wire.

The pure nickel wire has good strength, strong plasticity and poor thermal conductivity at high temperature.

Preferably, the insulating and heat conducting core 40 and the insulating and heat conducting powder 50 are made of magnesium oxide material.

The magnesium oxide has high fire-resistant insulating property, high compression density and excellent heat radiation property.

Preferably, the steel pipe layer 20 is made of stainless steel; preferably, the steel pipe layer 20 is made of one of 304 stainless steel and 321 stainless steel, and preferably 304 stainless steel. Preferably, the steel pipe layer 20 is a seamless steel pipe layer 20.

Preferably, the seamless copper tube layer 10 is one of oxygen-free red copper, brass or copper-tin alloy. Preferably, the seamless copper tube layer 10 is oxygen-free red copper.

Preferably, the thickness of the steel pipe layer 20 is 0.6-1.2mm, and the thickness of the seamless copper pipe layer 10 is 0.2-0.6 mm.

Preferably, the cover 60 is one of mica, ceramic or ceramic glue.

Referring to fig. 1-2, one end of the mounting channel is sealed, and the other end is provided with a sealing cover 60 and a lead-out wire 70.

Alternatively, both ends of the mounting channel are provided with a cover 60 and a lead-out wire 70.

In summary, the double-layer electric heating tube provided by the utility model has the advantages that the strength and hardness of the steel tube layer are high, the steel tube layer is not easy to deform, the heat conducting capacity of the seamless copper tube layer is strong, the oxidation resistance and the corrosion resistance are strong, and the harm of scale is reduced; the strength of the electric heating tube is greatly enhanced, the electric heating tube can be prevented from explosion cracking, and the safety of the electric heating tube is improved; the thickness of the seamless copper tube layer is greatly reduced, the use of copper materials is reduced, the production cost is saved, and the market competitiveness is improved.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment of the above embodiments without departing from the scope of the present invention.

Claims (9)

1. A double-layer electric heating tube is characterized by comprising:

the steel pipe layer is internally provided with an installation channel;

the heating element is arranged in the mounting channel, a sealing cover and a leading-out wire extending out of the sealing cover are arranged in the mounting channel, the heating element comprises a heating wire and a magnesium oxide rod, the magnesium oxide rod is connected with the leading-out wire, the heating wire is connected with the magnesium oxide rod, and the heating element is connected with the leading-out wire;

the magnesium oxide rod penetrates through the insulating heat conducting core, and the heating wire is wound on the insulating heat conducting core;

the insulating heat conduction powder is filled between the insulating heat conduction core and the steel pipe layer;

and the seamless copper pipe layer is wrapped outside the steel pipe layer.

2. The dual layer electrical heating tube as claimed in claim 1, wherein the lead wires extending out of the cover are covered with an insulating material.

3. The double-layered electrothermal tube according to claim 1, wherein the lead wire is a pure nickel wire.

4. The double-layered electrothermal tube according to claim 1, wherein the insulating and heat-conducting core and the insulating and heat-conducting powder are made of magnesium oxide.

5. The double layer electrothermal tube of claim 1, wherein the steel tube layer is made of 304 stainless steel.

6. The dual layer electrical heating tube of claim 1, wherein said seamless copper tube layer is oxygen free red copper.

7. The dual layer electrical heating tube of claim 1, wherein said cover is one of mica, ceramic or ceramic glue.

8. The double-layer electrothermal tube according to claim 1, wherein one end of the mounting channel is sealed, and the other end of the mounting channel is provided with the sealing cover and the lead wire.

9. The double-layered electrothermal tube according to claim 1, wherein the sealing cap and the lead wire are provided at both ends of the mounting passage.

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