Spiral efficient resistance heating tube structure

Abstract

The utility model discloses a spiral high-efficiency resistance heating tube structure, which comprises a resistance heating outer tube, a resistance heating central rod is arranged in the resistance heating outer tube, and spiral rib plates distributed at equal intervals are arranged between the resistance heating outer tube and the resistance heating central rod; a plurality of spiral heating flow channels are formed among the resistance heating outer pipe, the resistance heating center rod and the spiral rib plate, the resistance heating outer pipe and the resistance heating center rod form a double-layer pipe body structure, a spiral structure is adopted in the double-layer pipe body structure, and the resistance heating center rod and the spiral rib plate are arranged in the double-layer pipe body structure. The heat transfer area of the resistance heating pipe can be greatly increased, the disturbance intensity of airflow in the resistance heating pipe is increased, the heat transfer effect is enhanced, the heating efficiency is improved, and high-temperature deformation of the resistance heating pipe is effectively prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric heating, and particularly relates to a spiral high-efficiency resistance heating tube structure. Background Technique

[0002] At present, the heating elements of industrial electric heaters usually adopt resistance tubes, resistance rods (wires), silicon carbide rods, etc. The heating tubes of ordinary resistance tube heaters are arranged with multiple hollow resistance tubes. The hollow resistance tubes are spaced and fixed by multiple support plates. The resistance tubes are connected in series and parallel, and are connected at one end in a "Y" or "△" connection method to conduct electricity. The current passes through the resistance tubes, and the resistance tube body generates heat. The medium to be heated needs to flow through the hollow tube, enter from one end of the resistance tube, and flow out from the other end, so as to achieve the purpose of heating the medium. However, this heating tube structure still has the following disadvantages:

[0003] 1. The resistance tube adopts a single-layer structure, and the heat exchange surface is only one surface of the inner wall of the resistance tube. The heat exchange area is small. Without increasing the surface temperature, it is necessary to increase the number or length of the resistance tubes;

[0004] 2. The heat exchange surface of the resistance tube is small. Under the condition of a certain length dimension, due to the limitation of the number of tubes, the surface heat load of the resistance tube will be relatively large and it is easy to overheat; under the condition of no size limitation, to reach the specified heating power, it is necessary to increase the number of resistance tubes, resulting in an increase in the external dimension of the equipment;

[0005] 3. The single-layer resistance tube has poor self-rigidity and is prone to deformation under the influence of thermal stress at high temperatures;

[0006] 4. After the single-layer resistance tubes are connected in series, the resistance value is large. When it is necessary to reach the specified power, a larger voltage needs to be used, which is more dangerous; if you want to reduce the resistance, it is necessary to increase the wall thickness or increase the grouping, increasing the later power distribution cost;

[0007] 5. The existing resistance tubes generally adopt the form of bright tubes, the medium flow is relatively smooth, the fluid disturbance intensity is low, and the heat transfer effect is poor;

[0008] Therefore, we propose a spiral high-efficiency resistance heating tube structure. Content of the Utility Model

[0009] The purpose of the utility model is to provide a spiral high-efficiency resistance heating tube structure to solve the problems raised in the above background technique.

[0010] To achieve the above purpose, the utility model provides the following technical solution: a spiral high-efficiency resistance heating tube structure, including a resistance heating outer tube, a resistance heating center rod is arranged inside the resistance heating outer tube, and spiral rib plates are arranged at equal intervals between the resistance heating outer tube and the resistance heating center rod;

[0011] A plurality of spiral heating channels are formed among the resistance heating outer tube, the resistance heating central rod, and the spiral rib plates.

[0012] Preferably, the resistance heating outer tube, the resistance heating central rod, and the spiral rib plates have the same length.

[0013] Preferably, the resistance heating central rod is located at the center inside the resistance heating outer tube.

[0014] Preferably, the spiral rib plates are welded to the outer periphery of the resistance heating central rod.

[0015] Preferably, one end of the resistance heating outer tube is provided with a notch aligned with the end of the spiral rib plate, and a section of the spiral rib plate aligned with the notch is of a straight structure.

[0016] Preferably, the spiral rib plates and the resistance heating outer tube are connected by welding at the notch positions.

[0017] Preferably, the spiral rib plates are provided with flow disturbance grooves or flow disturbance holes.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. The present utility model is provided with a resistance heating outer tube, a resistance heating central rod, and spiral rib plates. The resistance heating outer tube and the resistance heating central rod form a double-layer tube structure, and its interior adopts a spiral structure, which can greatly increase the heat transfer area of the resistance heating tube, improve the heat transfer efficiency, reduce the power consumption, save energy and reduce emissions, and solve the problems of the small heating area and low heating efficiency of ordinary single-layer resistance tubes.

[0020] 2. The present utility model adopts a spiral structure. The resistance heating central rod and the spiral rib plates also become the heating area, and the medium heating process is increased, which can effectively control the surface load of the resistance tube, reduce the surface temperature of the resistance heating tube, avoid the risk of overheating, and increase the service life of the resistance heating tube; at the same time, the number of resistance heating tubes can be appropriately reduced without increasing the power, effectively reducing the equipment diameter, improving the economy, reducing the material cost, and solving the problem that the surface load of ordinary single-layer resistance tubes remains basically unchanged and has a greater impact on the equipment size.

[0021] 3. The present utility model adopts a spiral structure, and the internal resistance heating central rod and spiral rib plates play a role in enhancing the stiffness, which can effectively prevent the occurrence of high-temperature deformation of the resistance heating tube and solve the problem that ordinary single-layer resistance tubes have poor self-stiffness and are prone to bending deformation.

[0022] 4. The utility model combines a spiral structure to form an integral spiral resistance heating tube, increasing the cross-sectional area of the resistance heating tube, reducing the resistance value of the resistance heating tube, lowering the overall resistance of the heating core, reducing the difficulty and cost of power distribution, improving economy, enhancing market competitiveness, and solving the problems of high voltage and few groups in ordinary single-layer resistance tubes, which will increase the power distribution cost and usage safety.

[0023] 5. The spiral rib plate of the utility model can be grooved and perforated, which can increase the disturbance intensity of the air flow in the resistance heating tube, enhance the heat transfer effect, improve the heating efficiency, and solve the problems of low disturbance intensity and poor heat transfer effect in ordinary resistance heating tubes using bright tube forms. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic perspective view of the overall structure of the utility model;

[0025] Figure 2 is a schematic perspective view of the resistance heating center rod and the spiral rib plate of the utility model;

[0026] Figure 3 is a schematic perspective view of the resistance heating outer tube of the utility model.

[0027] In the figure: 1. Resistance heating outer tube; 2. Resistance heating center rod; 3. Spiral rib plate; 4. Notch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0029] Please refer to Figures 1 - 3 , the spiral high-efficiency resistance heating tube structure provided by the utility model includes a resistance heating outer tube 1, a resistance heating center rod 2 is arranged inside the resistance heating outer tube 1, the resistance heating center rod 2 is located at the center inside the resistance heating outer tube 1, spiral rib plates 3 are arranged at equal intervals between the resistance heating outer tube 1 and the resistance heating center rod 2, the spiral rib plates 3 are welded to the outer circumference of the resistance heating center rod 2, and the resistance heating outer tube 1, the resistance heating center rod 2 and the spiral rib plates 3 have the same length;

[0030] A plurality of spiral heating channels are formed between the resistance heating outer tube 1, the resistance heating center rod 2 and the spiral rib plates 3.

[0031] In the present utility model, a plurality of spiral heating channels are formed between the resistance heating outer tube 1, the resistance heating central rod 2 and the spiral rib plate 3. During use, both ends of the resistance heating tube are electrified to generate heat as a heat source. The medium to be heated flows in from one end of the resistance heating tube, and the disturbance intensity is increased through multiple spiral heating channels. The medium exchanges heat by contacting the inner wall of the resistance heating outer tube 1, the outer side of the resistance heating central rod 2 and the surface of the spiral rib plate 3, thereby improving the heat transfer efficiency.

[0032] In this embodiment, as Figures 1 - 3 shown, a notch 4 aligned with the end of the spiral rib plate 3 is provided at one end of the resistance heating outer tube 1. A section of the spiral rib plate 3 aligned with the notch 4 is of a straight structure. The spiral rib plate 3 and the notch 4 on the resistance heating outer tube 1 are connected by welding to improve the structural strength of the resistance heating tube.

[0033] In this embodiment, turbulence grooves or turbulence holes are provided on the spiral rib plate 3 to increase the disturbance intensity when the medium to be heated passes through, thereby improving the heat transfer efficiency.

[0034] Advantages of the present utility model:

[0035] 1. The present utility model is provided with a resistance heating outer tube 1, a resistance heating central rod 2 and a spiral rib plate 3. The resistance heating outer tube 1 and the resistance heating central rod 2 form a double-layer tube structure, and its interior adopts a spiral structure, which can greatly increase the heat transfer area of the resistance heating tube, improve the heat transfer efficiency, reduce power consumption, save energy and reduce emissions, and solve the problems of the small heating area and low heating efficiency of ordinary single-layer resistance tubes.

[0036] 2. The present utility model adopts a spiral structure. The resistance heating central rod and the spiral rib plate also become part of the heating area, and the heating process of the medium is increased. It can effectively control the surface load of the resistance tube, reduce the surface temperature of the resistance heating tube, avoid the risk of overheating, and increase the service life of the resistance heating tube. At the same time, without increasing the power, the number of resistance heating tubes can be appropriately reduced, effectively reducing the diameter of the equipment, improving the economy, reducing the material cost, and solving the problem that the surface load of ordinary single-layer resistance tubes remains basically unchanged and has a greater impact on the equipment size.

[0037] 3. The present utility model adopts a spiral structure. The internal resistance heating central rod and spiral rib plate play a role in enhancing the stiffness, which can effectively prevent the occurrence of high-temperature deformation of the resistance heating tube, and solve the problem that ordinary single-layer resistance tubes have poor self-stiffness and are prone to bending deformation.

[0038] 4. The utility model combines a spiral structure to form an integral spiral resistance heating tube, increasing the cross-sectional area of the resistance heating tube, reducing the resistance value of the resistance heating tube, lowering the overall resistance of the heating core, reducing the power distribution difficulty and cost, improving the economy, enhancing the market competitiveness, and solving the problems of high voltage and few groups of ordinary single-layer resistance tubes, which will increase the power distribution cost and the use safety.

[0039] 5. The spiral rib plates of the utility model can be grooved and perforated, which can increase the disturbance intensity of the air flow inside the resistance heating tube, enhance the heat transfer effect, improve the heating efficiency, and solve the problems of low disturbance intensity and poor heat transfer effect of ordinary resistance heating tubes in the form of bright tubes.

[0040] In summary, the usage method of the spiral high-efficiency resistance heating tube structure provided in this embodiment: during use, the two ends of the resistance heating tube are energized to make it generate heat as a heat source. The medium to be heated flows in from one end of the resistance heating tube, and the disturbance intensity is increased through multiple spiral heating channels, and heat exchange is carried out by contacting the inner wall of the resistance heating outer tube 1, the outer side of the resistance heating center rod 2, and the surface of the spiral rib plate 3, improving the heat transfer efficiency.

[0041] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A spiral high-efficiency resistance heating tube structure, characterized in that: It comprises a resistance heating outer tube (1), a resistance heating central rod (2) is arranged inside the resistance heating outer tube (1), and spiral ribs (3) distributed at equal intervals are arranged between the resistance heating outer tube (1) and the resistance heating central rod (2); A plurality of spiral heating flow channels are formed between the resistance heating outer tube (1), the resistance heating central rod (2) and the spiral rib plate (3).

2. A spiral high-efficiency resistance heating tube structure according to claim 1, characterized in that: The resistance heating outer tube (1), the resistance heating center rod (2) and the spiral rib plate (3) have the same length.

3. A spiral high-efficiency resistance heating tube structure according to claim 2, characterized in that: The resistance heating central rod (2) is located at the center inside the resistance heating outer tube (1).

4. A spiral high-efficiency resistance heating tube structure according to claim 3, characterized in that: The spiral rib plate (3) is welded to the outer circumference of the resistance heating center rod (2).

5. The spiral high-efficiency resistance heating tube structure according to claim 1, characterized in that: A notch (4) aligned with the end of the spiral rib (3) is formed at one end of the resistance heating outer tube (1), and a section of the spiral rib (3) aligned with the notch (4) is a straight structure.

6. A spiral high-efficiency resistance heating tube structure according to claim 5, characterized in that: The spiral rib plate (3) and the notch (4) on the resistance heating outer tube (1) are connected by welding.

7. The spiral high-efficiency resistance heating tube structure according to claim 1, characterized in that: The spiral rib plate (3) is provided with a spoiler groove or a spoiler hole.

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