U-shaped heating pipe

Abstract

The utility model belongs to the technical field of U-shaped pipes, and particularly discloses a U-shaped heating pipe, which comprises a continuously bent U-shaped pipe body, a heating wire is arranged in the U-shaped pipe body, an insulating layer is arranged in the U-shaped pipe body and is positioned on the heating wire, the U-shaped pipe body is a stainless steel pipe, and the U-shaped pipe body is a stainless steel pipe. A reinforcing structure layer consistent with the U-shaped tube body in shape is arranged on the outer side of the bent portion of the U-shaped tube body, the end of the U-shaped tube body is connected with an end connecting portion, the insulating layer is an aluminum oxide ceramic layer, and a gap between the insulating layer and the heating wire is filled with magnesium oxide powder. According to the scheme, the reinforcing structure is additionally arranged at the bending part of the U-shaped heating pipe, so that the strength of the whole structure can be improved, the risks of deformation and damage are reduced, the stress of the bending part can be effectively dispersed, the stress is prevented from being excessively concentrated in a certain local area, and the bearing capacity and durability of the U-shaped pipe are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of U-shaped tubes, in particular to a U-shaped heating tube. Background Art

[0002] An electric furnace is a device that uses electricity as an energy source and provides a high-temperature heat source through electric heating. It is usually composed of a heating element, a control system, a shell, and an insulation layer. In an electric furnace, electrical energy is converted into thermal energy through the heating element to generate high temperature. The heating element is usually installed in the container or pipe of the electric furnace to transfer heat to the object or medium to be heated.

[0003] Among them, the U-shaped heating tube is one of the commonly used electric heating elements, which is used to provide heat during the heat treatment process. It is usually composed of a metal tube body that is continuously bent into a U shape, with a heating wire inside and an insulation layer. However, the current U-shaped heating tube is prone to stress concentration at the bending part, and its bending part is prone to deformation and damage. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a U-shaped heating tube.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A U-shaped heating tube comprises a continuously bent U-shaped tube body, a heating wire is arranged in the U-shaped tube body, an insulating layer is arranged inside the U-shaped tube body and at the heating wire, the U-shaped tube body is a stainless steel tube, a reinforcing structure layer consistent with its shape is arranged on the outside of the bent portion of the U-shaped tube body, and an end connection portion is connected to the end of the U-shaped tube body.

[0007] As a further description of the above technical solution: the insulating layer is an aluminum oxide ceramic layer, and the gap between the insulating layer and the heating wire is filled with magnesium oxide powder.

[0008] As a further description of the above technical solution: the heating wire is a resistance wire made of nickel-chromium alloy, and the heating wire is spirally arranged inside the insulating layer.

[0009] As a further description of the above technical solution: the surface of the U-shaped tube body is provided with a corrosion-resistant coating.

[0010] As a further description of the above technical solution: the reinforcement structure layer is a semicircular stainless steel structure, and the reinforcement structure layer is welded to the bending part of the U-shaped tube body.

[0011] Compared with the prior art, the advantages of the present invention are:

[0012] 1. Enhance the strength of the bending part: By adding a reinforcing structural layer to the bending part of the U-shaped tube body, the rigidity and strength of this part can be effectively enhanced, the risk of deformation and breakage can be reduced, and the overall bearing capacity and durability can be improved.

[0013] 2. Disperse stress: Strengthening the structural layer can effectively disperse the stress in the bending part, avoid excessive concentration of stress in a certain local area, and reduce the risk of structural damage caused by stress.

[0014] 3. Excellent insulation protection: The insulation layer is made of alumina ceramic material and filled with magnesium oxide powder to further improve the insulation performance, effectively isolating the heating wire from the external environment, while promoting heat transfer and improving heating efficiency.

[0015] 4. Uniform heating: The resistance wire made of nickel-chromium alloy is arranged in a spiral form inside the insulating layer to achieve uniform heating of the heating area, reduce heat loss and improve heating efficiency.

[0016] 5. Excellent high temperature resistance: The resistance wire made of nickel-chromium alloy has stable resistance characteristics and low resistivity temperature coefficient. It can work stably for a long time in a high temperature environment and maintain stable heating power output.

[0017] 6. Enhanced corrosion resistance: The U-shaped tube body is made of stainless steel and has a corrosion-resistant coating on the surface. It has the advantages of high temperature resistance, corrosion resistance, high strength, etc., which can extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 For this utility model Figure 1 A top view of

[0020] Figure 3 For this utility model Figure 1 Side view of

[0021] Figure 4 This is a schematic diagram of the internal structure of the U-shaped tube body of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the reinforced structural layer of the utility model.

[0023] Description of the numbers in the figure:

[0024] 1. U-shaped tube body; 2. Heating wire; 3. Insulation layer; 4. Reinforced structural layer; 5. End connection; 6. Magnesium oxide powder; 7. Corrosion-resistant coating. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 A U-shaped heating tube comprises a continuously bent U-shaped tube body 1, a heating wire 2 is arranged in the U-shaped tube body 1, an insulating layer 3 is arranged in the U-shaped tube body 1 and located at the heating wire 2, the U-shaped tube body 1 is a stainless steel tube, a reinforcing structure layer 4 consistent with its shape is arranged on the outside of the bent portion of the U-shaped tube body 1, and an end connection portion 5 is connected to the end of the U-shaped tube body 1.

[0027] This solution can enhance the rigidity and strength of the bending portion and reduce the risk of deformation and breakage by adding a reinforcing structure layer 4 to the bending portion of the U-shaped tube body. At the same time, the reinforcing structure layer 4 can effectively disperse the stress in the bending portion to avoid excessive concentration of stress in a certain local area, thereby improving the load-bearing capacity and durability of the U-shaped tube.

[0028] Among them, Figure 5 As shown, the reinforcing structure layer 4 is a semicircular stainless steel structure, and the reinforcing structure layer 4 is welded to the bending part of the U-shaped tube body 1. It is easy to install, and the stainless steel structure has high strength and corrosion resistance. After bending and shaping, it can be wrapped around the bending part of the U-shaped heating tube to play a reinforcing role.

[0029] The insulating layer 3 is an alumina ceramic layer, which is a high temperature resistant and corrosion resistant material with good insulation and thermal conductivity. The gap between the insulating layer 3 and the heating wire 2 is filled with magnesium oxide powder 6, which has good thermal conductivity and insulation properties. Filling the gap between the insulating layer 3 and the heating wire 2 can effectively promote heat transfer, improve heating efficiency, and further improve the insulation protection effect.

[0030] The heating wire 2 is a resistance wire made of nickel-chromium alloy, which has the advantages of high temperature resistance, stable resistance characteristics, corrosion resistance and high strength, and the nickel-chromium alloy resistance wire has a low resistivity temperature coefficient, which means that when the temperature changes, the resistance change of the resistance wire is relatively small, maintaining a stable heating power output. The heating wire 2 is spirally arranged inside the insulating layer 3, which can achieve uniform heating of the heating area, and at the same time make the heat conduction distance between the heating wire 2 and the insulating layer 3 relatively short, reducing heat loss and improving heating efficiency.

[0031] In addition, the surface of the U-shaped tube body 1 is provided with a corrosion-resistant coating 7 to improve the corrosion resistance.

[0032] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A U-shaped heating tube, comprising a continuously bent U-shaped tube body (1), characterized in that: A heating wire (2) is arranged in the U-shaped tube body (1), an insulating layer (3) is arranged in the U-shaped tube body (1) and located on the heating wire (2), the U-shaped tube body (1) is a stainless steel tube, a reinforcing structure layer (4) having the same shape as the bending portion of the U-shaped tube body (1) is arranged on the outside, and an end connection portion (5) is connected to the end of the U-shaped tube body (1).

2. A U-shaped heating tube according to claim 1, characterized in that: The insulating layer (3) is an aluminum oxide ceramic layer, and the gap between the insulating layer (3) and the heating wire (2) is filled with magnesium oxide powder (6).

3. The U-shaped heating tube according to claim 1, characterized in that: The heating wire (2) is a resistance wire made of a nickel-chromium alloy, and the heating wire (2) is spirally arranged inside the insulating layer (3).

4. The U-shaped heating tube according to claim 1, characterized in that: The surface of the U-shaped tube body (1) is provided with a corrosion-resistant coating (7).

5. The U-shaped heating tube according to claim 1, characterized in that: The reinforcing structure layer (4) is a semicircular stainless steel structure, and the reinforcing structure layer (4) is welded to the bending portion of the U-shaped tube body (1).

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