Electric heating tube capable of heating uniformly

Abstract

The utility model discloses an electric heating tube with uniform heating, comprising an electric heating tube, the periphery of the electric heating tube is provided with arc-shaped grooves distributed at equal intervals, a multi-segment resistance wire assembly is arranged in the electric heating tube through an insulating layer, and the multi-segment resistance wire assembly comprises a plurality of extraction electrode bars and a heating resistance wire. The plurality of extraction electrode bars and the plurality of heating resistance wires are alternately connected, and the outer diameters of the plurality of heating resistance wires are gradually reduced along the direction in which the fluid to be heated flows through the electric heating tube, the electric heating tube is provided with the arc-shaped groove and the multi-section resistance wire assembly, and the arc-shaped groove increases the turbulent flow effect of the fluid to be heated, so that the fluid to be heated can be heated more uniformly. The temperature dead zone area of the electric heating pipe is reduced, the heating uniformity of the electric heating pipe is improved, the multi-section resistance wire assembly is adopted for achieving segmented heating on the electric heating pipe, the temperature difference between the electric heating pipe and the fluid to be heated is reduced, the heating temperature of the fluid to be heated by the electric heating pipe is more uniform, and heating at different temperatures is achieved in a segmented mode.

Description

Technical Field

[0001] This utility model belongs to the field of electric heating tube technology, and specifically relates to an electric heating tube that provides uniform heating. Background Technology

[0002] When existing electric heating tubes are used for heating, the fluid to be heated flows through the tube, and a temperature dead zone appears on the other side because one side of the electric heating tube faces the flowing fluid. Moreover, most existing electric heating tubes are designed to maintain a uniform heating temperature, resulting in a significant temperature difference between the fluid to be heated and the electric heating tube at both ends. This leads to uneven heating and affects the heat exchange efficiency of the electric heating tube. To address this issue, we propose an electric heating tube that provides more uniform heating. Utility Model Content

[0003] The purpose of this invention is to provide an electric heating tube that provides uniform heating, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electric heating tube for uniform heating, comprising,

[0005] An electric heating element, wherein the outer periphery of the electric heating element is provided with equally spaced arc-shaped grooves;

[0006] A multi-segment resistance wire assembly is provided inside the electric heating tube through an insulating layer. The multi-segment resistance wire assembly includes several lead-out electrode rods and heating resistance wires, which are alternately connected. The outer diameter of the heating resistance wires gradually decreases along the direction in which the fluid to be heated flows through the electric heating tube.

[0007] Preferably, the outer diameter of the heating resistance wire is 0.4-0.8 mm.

[0008] Preferably, the insulating layer is a filler layer made of insulating material.

[0009] Preferably, a plurality of the lead-out electrode rods and the heating resistance wire are disposed in the middle of the interior of the electric heating tube through the insulating layer.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. In this utility model, a multi-segment resistance wire assembly is used to achieve segmented heating of the electric heating tube. The outer diameter of several heating resistance wires gradually decreases along the direction of the fluid to be heated flowing through the electric heating tube. The larger the outer diameter of the heating resistance wire, the smaller the resistance, the higher the power, and the higher the heating temperature. This causes the heating temperature of the electric heating tube to gradually decrease along the direction of the fluid to be heated. The fluid to be heated begins to exchange heat with the high-temperature area of ​​the electric heating tube, and then gradually exchanges heat with the low-temperature area of ​​the electric heating tube. This reduces the temperature difference between the electric heating tube and the fluid to be heated, and gradually reduces the surface temperature of the electric heating tube. The heating temperature of the electric heating tube is more uniform, and segmented heating at different temperatures extends the service life of the electric heating tube.

[0012] 2. In this utility model, an arc-shaped groove is provided in the electric heating tube. When the fluid to be heated flows through the electric heating tube, the arc-shaped groove on the outer periphery of the electric heating tube causes the fluid to be heated to generate small vortices near the surface of the arc-shaped groove. The suction force of the small vortices attracts the fluid to be heated in the vicinity, causing the laminar flow of the small vortices to be forced into turbulence, increasing the turbulent disturbance effect of the fluid to be heated, reducing the resistance of the fluid to be heated, and reducing the temperature dead zone area of ​​the electric heating tube, extending the service life of the electric heating tube, allowing the fluid to be heated and the electric heating tube to exchange heat fully, and improving the heating uniformity of the electric heating tube. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural diagram of the electric heating tube of this utility model.

[0015] In the diagram: 1. Electric heating tube; 2. Arc-shaped groove; 3. Multi-segment resistance wire assembly; 301. Lead-out electrode rod; 302. Heating resistance wire; 4. Insulation layer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-2 The electric heating tube with uniform heating provided by this utility model includes,

[0018] Electric heating tube 1, with equally spaced arc-shaped grooves 2 on the outer periphery of electric heating tube 1;

[0019] In this invention, an arc-shaped groove is provided in the electric heating tube 1. When the fluid to be heated flows through the electric heating tube 1, the arc-shaped groove 2 on the outer periphery of the electric heating tube 1 causes the fluid to be heated to generate small vortices near the surface of the arc-shaped groove 2. The suction force of the small vortices attracts the fluid to be heated in the vicinity, causing the laminar flow of the small vortices to be forced into turbulence, increasing the turbulent disturbance effect of the fluid to be heated, reducing the resistance of the fluid to be heated, reducing the temperature dead zone area of ​​the electric heating tube, extending the service life of the electric heating tube, and enabling the fluid to be heated and the electric heating tube 1 to exchange heat fully, thereby improving the heating uniformity of the electric heating tube.

[0020] A multi-segment resistance wire assembly 3 is disposed inside the electric heating tube 1 through an insulating layer 4. The multi-segment resistance wire assembly 3 includes several lead-out electrode rods 301 and heating resistance wires 302, which are alternately connected. The outer diameter of the heating resistance wires 302 gradually decreases along the direction of the fluid to be heated flowing through the electric heating tube 1. The outer diameter of the heating resistance wires 302 is 0.4-0.8 mm. The insulating layer 4 is a filling layer made of insulating material. The several lead-out electrode rods 301 and heating resistance wires 302 are disposed in the middle of the interior of the electric heating tube 1 through the insulating layer 4.

[0021] In this invention, a multi-segment resistance wire assembly 3 is used to achieve segmented heating of the electric heating tube 1. The outer diameter of several heating resistance wires 302 gradually decreases along the direction of the fluid to be heated flowing through the electric heating tube 1. The larger the outer diameter of the heating resistance wire 302, the smaller the resistance, the higher the power, and the higher the heating temperature. This causes the heating temperature of the electric heating tube 1 to gradually decrease along the direction of the fluid to be heated. The fluid to be heated begins to exchange heat with the high-temperature region of the electric heating tube 1, and then gradually exchanges heat with the low-temperature region of the electric heating tube 1. This reduces the temperature difference between the electric heating tube 1 and the fluid to be heated, and gradually lowers the surface temperature of the electric heating tube 1. The heating temperature of the electric heating tube 1 is more uniform, and segmented heating at different temperatures extends the service life of the electric heating tube.

[0022] In summary, the method of using the uniformly heated electric heating element provided in this embodiment is as follows:

[0023] A: When the fluid to be heated flows through the electric heating tube 1, the electric heating tube 1 uses the arc-shaped groove 2 on its outer periphery to generate small vortices in the fluid to be heated near the surface of the arc-shaped groove 2. The suction force of the small vortices attracts the fluid to be heated in the vicinity, causing the laminar flow of the small vortices to be forced into turbulence, increasing the turbulent disturbance effect of the fluid to be heated, while reducing the resistance of the fluid to be heated, so that the fluid to be heated and the electric heating tube 1 can exchange heat fully.

[0024] B: Several heating resistance wires 302 inside the electric heating tube 1 heat the electric heating tube 1. The outer diameter of the heating resistance wires 302 gradually decreases along the direction of the fluid to be heated flowing through the electric heating tube 1, so that the heating temperature of the electric heating tube 1 along the direction of the fluid to be heated gradually decreases, reducing the temperature difference between the electric heating tube 1 and the fluid to be heated, and gradually reducing the surface temperature of the electric heating tube 1, making the heating temperature of the electric heating tube 1 more uniform.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric heating tube for uniform heating, characterized in that, include, An electric heating tube (1) is provided with equally spaced arc-shaped grooves (2) on its outer periphery. A multi-segment resistance wire assembly (3) is disposed inside the electric heating tube (1) through an insulating layer (4). The multi-segment resistance wire assembly (3) includes several lead-out electrode rods (301) and heating resistance wires (302). The several lead-out electrode rods (301) and heating resistance wires (302) are alternately connected, and the outer diameter of the several heating resistance wires (302) gradually decreases along the direction of the fluid to be heated flowing through the electric heating tube (1).

2. The electric heating tube for uniform heating according to claim 1, characterized in that: The outer diameter of the heating resistance wire (302) is 0.4-0.8 mm.

3. The electric heating tube for uniform heating according to claim 1, characterized in that: The insulating layer (4) is a filler layer made of insulating material.

4. The electric heating tube for uniform heating according to claim 3, characterized in that: Several of the lead-out electrode rods (301) and the heating resistance wires (302) are disposed in the middle of the interior of the electric heating tube (1) through the insulating layer (4).

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