Indirect heater structure with heating pipe with triangular section

Abstract

The utility model relates to the technical field of heaters, and discloses an indirect heater structure with a heating pipe with a triangular section, which comprises a conveying pipe for conveying a heated medium, a spiral heating pipe is wound on the side surface of the conveying pipe, and the section of the spiral heating pipe is triangular. One side of the heating spiral pipe is attached to the side face of the conveying pipe, and connecting flanges are arranged at the two ends of the conveying pipe. According to the heating device, a heated medium is heated indirectly, the conveying pipe is heated through the heating spiral pipe, the heated medium is heated through the conveying pipe, the heating spiral pipe does not make direct contact with the heated medium, the heating spiral pipe is prevented from being corroded and influenced by the heated medium, and the section of the heating spiral pipe is in a triangular shape; the contact area of the heating spiral pipe and the conveying pipe is larger, the heat transfer efficiency is improved, the energy loss during heating of a heated medium is reduced, meanwhile, the temperature of the surface of the heating spiral pipe is reduced, and the service life of the heating spiral pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of heaters, and particularly to an indirect heater structure with a heating pipe having a triangular cross-section. Background Art

[0002] Indirect heating means heating the heated medium without contact. In the prior art, an indirect heater is composed of a heating pipe and a water pipe. After the heating pipe is heated, it heats the water in the water pipe.

[0003] In order to improve the heating efficiency of the indirect heater, many improvements have been made to the indirect heater in the prior art. For example, the patent with the publication number CN211261243U discloses a spiral tube heater, which includes a water pipe, a cold water inlet, a hot water outlet, a heating pipe one and a heating pipe two. One end of the water pipe is provided with the cold water inlet, the other end of the water pipe is provided with the hot water outlet, one side of the water pipe is provided with the heating pipe one, and the heating pipe two is arranged on the other side of the water pipe. The advantages of this utility model compared with the prior art are as follows: Different from the existing electric heating method, using the principle of heat conduction and the rapid heat transfer property of the refrigeration medium, the heat of the heating object is quickly transferred outside the heat source through the heat pipe, and its heat conduction can reach the spiral tube for heating. When cold water passes through the solenoid tube, it is heated. Compared with the same products on the market at present, it has high safety, fast heating method, realizes the separation of water and electricity to protect people from direct contact with water, thereby protecting the original minerals in the water and being beneficial to human health.

[0004] The above patent has obvious beneficial effects, but there are still the following deficiencies in actual operation:

[0005] In the above comparative document, the heated medium is conveyed through the water pipe, the heating pipe is continuously heated, and the heating pipe exchanges heat with the heated medium in the water pipe, so as to achieve the effect of heating the heated medium in the water pipe. In actual situations, in order to achieve the best heat exchange effect, the heating pipe is preferably attached to the side surface of the water pipe, which can improve the heating efficiency of the heated medium in the water pipe. However, the cross-sections of the existing heating pipes are all circular, and the contact area between the heating pipe with a circular cross-section and the outer side surface of the water pipe is small, so the heating effect on the heated medium inside the water pipe is reduced. Therefore, it is urgent for this field to improve the structure of the indirect heater to solve the defects of the prior art. Summary of the Utility Model

[0006] In view of the deficiencies of the prior art, the utility model provides an indirect heater structure with a heating pipe having a triangular cross-section. The cross-section of the heating spiral pipe is triangular, and the contact area between the heating spiral pipe and the conveying pipe is larger, improving the heat transfer efficiency.

[0007] To achieve the above object, the present utility model provides the following technical solution: An indirect heater structure with a heating tube having a triangular cross-section, comprising a conveying pipe for conveying the medium to be heated, a spiral heating coil is wound around the side of the conveying pipe, the cross-section of the heating coil is triangular, one side of the heating coil is attached to the side of the conveying pipe, and connecting flanges are provided at both ends of the conveying pipe.

[0008] Preferably, a flow guiding column concentric with the conveying pipe is provided inside the conveying pipe, and both ends of the flow guiding column are conical.

[0009] Preferably, a first threaded step is provided on the inner side wall of the end of the connecting flange close to the conveying pipe, a first connecting ring adapted to the inner cavity of the connecting flange is threadedly connected at the first threaded step, and a connecting rod is fixedly connected between the first connecting ring and the flow guiding column.

[0010] Preferably, a plurality of limiting rods are fixedly connected to the side of the flow guiding column, a plurality of limiting grooves communicating with the outside are provided on the inner side wall of the conveying pipe, and the limiting grooves are adapted to the limiting rods.

[0011] Preferably, the cross-sections of the connecting rod and the limiting rod are both rhombic.

[0012] Preferably, a second connecting ring is fixedly connected to the end of the connecting flange close to the conveying pipe, and second threaded steps adapted to the second connecting ring are provided on the inner side walls at both ends of the conveying pipe.

[0013] Preferably, a sealing ring is provided between the second connecting ring and the second threaded step.

[0014] Preferably, the number of the heating coils is multiple, and a plurality of the heating coils are spirally wound around the side of the conveying pipe in sequence.

[0015] In view of the deficiencies of the prior art, the present utility model provides an indirect heater structure with a heating tube having a triangular cross-section, which overcomes the deficiencies of the prior art. The beneficial effects of the present utility model are as follows:

[0016] 1. In the present utility model, the medium to be heated is heated indirectly. The heating coil heats the conveying pipe, and the conveying pipe heats the medium to be heated. The heating coil is not in direct contact with the medium to be heated, avoiding the influence of corrosion of the medium to be heated on the heating coil. The cross-section of the heating coil is triangular. Compared with the heaters in the prior art, the contact area between the heating coil and the conveying pipe in this embodiment is larger, improving the heat transfer efficiency, reducing the energy loss when heating the medium to be heated, and at the same time reducing the surface temperature of the heating coil and improving the service life of the heating coil.

[0017] 2. In the present utility model, when the medium to be heated passes through the connecting flange, it is guided by the tapered end of the flow guiding column, and the medium to be heated flows between the outer side surface of the flow guiding column and the inner side wall of the conveying pipe, preventing the medium to be heated in the middle of the conveying pipe from having a slow heating efficiency and improving the heating efficiency of the medium to be heated.

[0018] 3. In the present utility model, the cross-sections of the connecting rod and the limiting rod are rhomboid-shaped, reducing the resistance to the medium to be heated. Moreover, when the medium to be heated impacts the side surfaces of the connecting rod and the limiting rod, it will deflect the flow direction of the medium to be heated, playing a role in mixing the medium to be heated in the conveying pipe and improving the heating efficiency of the medium to be heated.

[0019] Other features and advantages of the present utility model will be described in the subsequent description, and partly become obvious from the description, or are understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the description. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 It is a schematic diagram of the sectional structure of the conveying pipe, heating spiral pipe, etc. in the present utility model;

[0023] Figure 3 It is an exploded schematic diagram of the overall structure of the present utility model;

[0024] Figure 4 It is a schematic diagram of the partial structure of the flow guiding column in the present utility model;

[0025] Figure 5 is Figure 2 The enlarged schematic diagram of part A in.

[0026] In the figure: 1, conveying pipe; 2, heating spiral pipe; 3, connecting flange; 4, flow guiding column; 5, first thread step; 6, first connecting ring; 7, connecting rod; 8, limiting rod; 9, limiting groove; 10, second connecting ring; 11, second thread step; 12, sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0028] Embodiment 1

[0029] Please refer to Figures 1-5 , an indirect heater structure with a heating tube having a triangular cross-section, including a conveying pipe 1 for conveying the medium to be heated. A spiral heating coil 2 is wound around the side of the conveying pipe 1. The cross-section of the heating coil 2 is triangular. One side of the heating coil 2 is in contact with the side of the conveying pipe 1. Connection flanges 3 are provided at both ends of the conveying pipe 1. The number of heating coils 2 is multiple, and several heating coils 2 are successively spirally wound around the side of the conveying pipe 1.

[0030] Specific implementation manner in this embodiment: The conveying pipe 1 in this embodiment is used to convey the medium to be heated, and heats the medium to be heated indirectly. The heating coil 2 heats the conveying pipe 1, and the conveying pipe 1 heats the medium to be heated. The heating coil 2 is not in direct contact with the medium to be heated, avoiding the influence of corrosion of the heating coil 2 by the medium to be heated. The wall thickness of the conveying pipe 1 is 2 - 8 times that of the wall thickness of the heating coil 2, with a stronger anti-corrosion effect, improving the service life of the overall heater. The cross-section of the heating coil 2 is triangular. Compared with the heaters in the prior art, the contact area between the heating coil 2 and the conveying pipe 1 in this embodiment is larger, improving the heat transfer efficiency, reducing the energy loss when heating the medium to be heated, and at the same time reducing the temperature on the surface of the heating coil 2, improving the service life of the heating coil 2. The connection flanges 3 at both ends of the conveying pipe 1 are used for connection and installation, improving the applicability of the overall heater. The conveying pipe 1 is of a straight-through structure, improving the flow rate of the medium to be heated in the conveying pipe 1. At the same time, the number of heating coils 2 is multiple, shortening the heating time of the medium to be heated and improving the heating efficiency of the overall heater.

[0031] Among them, the above-mentioned heating coil 2 can be purchased on the market, which belongs to a mature technology and has been fully disclosed, so it will not be repeated in the specification. The heating coil 2 is equipped with a power connection line, and it is electrically connected to the external main controller and the 220V phase voltage through the power line. And the main controller can be a conventional known device such as a computer that plays a control role.

[0032] Embodiment 2

[0033] Please refer to Figures 2-5, This embodiment includes the above - mentioned embodiment, and further includes: Inside the conveying pipe 1, there is a flow - guiding column 4 concentric with the conveying pipe 1. Both ends of the flow - guiding column 4 are conical. On the inner side wall of one end of the connecting flange 3 close to the conveying pipe 1, there is a first threaded step 5. At the first threaded step 5, a first connecting ring 6 adapted to the inner cavity of the connecting flange 3 is thread - connected. A connecting rod 7 is fixedly connected between the first connecting ring 6 and the flow - guiding column 4. On the side surface of the flow - guiding column 4, a number of limiting rods 8 are fixedly connected. On the inner side wall of the conveying pipe 1, a number of limiting grooves 9 communicating with the outside are provided. The limiting grooves 9 are adapted to the limiting rods 8. The cross - sections of the connecting rod 7 and the limiting rods 8 are both rhombic.

[0034] The specific implementation in this embodiment: When installing the connecting flanges 3, align the limiting rods 8 on the side surface of the flow - guiding column 4 with the limiting grooves 9, and insert the flow - guiding column 4 inside the conveying pipe 1. The connecting flange 3 is thread - connected to the side surface of the first connecting ring 6 through the first threaded step 5 to limit and fix the position of the flow - guiding column 4. When the medium to be heated passes through the connecting flange 3, it is guided by the conical shape at the end of the flow - guiding column 4, and the medium to be heated flows between the outer side surface of the flow - guiding column 4 and the inner side wall of the conveying pipe 1, preventing the medium to be heated in the middle of the conveying pipe 1 from having a slow heating efficiency. The cross - sections of the connecting rod 7 and the limiting rods 8 are rhombic, reducing the resistance to the medium to be heated. And when the medium to be heated impacts the side surfaces of the connecting rod 7 and the limiting rods 8, it will deflect the flow direction of the medium to be heated, playing a role in mixing the medium to be heated in the conveying pipe 1 and improving the heating efficiency of the medium to be heated. It should be noted that if the flow - guiding column 4 is not needed in the usage scenario, the flow - guiding column 4 can be disassembled.

[0035] Embodiment Three

[0036] Please refer to Figure 5 , This embodiment includes all the above - mentioned embodiments, and further includes: At one end of the connecting flange 3 close to the conveying pipe 1, a second connecting ring 10 is fixedly connected. On the inner side walls at both ends of the conveying pipe 1, second threaded steps 11 adapted to the second connecting ring 10 are provided. A sealing ring 12 is provided between the second connecting ring 10 and the second threaded steps 11.

[0037] The specific implementation in this embodiment: The connecting flange 3 can be connected to both ends of the conveying pipe 1 by welding. Of course, it can also be that the second connecting ring 10 on the connecting flange 3 is thread - connected to the second threaded step 11 to connect the connecting flange 3 and the end of the conveying pipe 1. When installing the connecting flange 3, embed the sealing ring 12 at the position of the second threaded step 11. The side surface of the connecting flange 3 is polygonal, and the operator can use an open - ended wrench to clamp on the outside of the connecting flange 3 and tighten the connecting flange 3. The second connecting ring 10 squeezes the sealing ring 12, improving the sealing performance after the connection of the connecting flange 3 and facilitating the disassembly of the connecting flange 3 later.

[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An indirect heater structure with a heating tube having a triangular cross section, comprising a delivery tube (1) for delivering a heated medium, characterized in that: A spiral heating coil (2) is wound around the side of the conveying pipe (1); the cross section of the heating coil (2) is triangular; one side of the heating coil (2) is in contact with the side of the conveying pipe (1); and connecting flanges (3) are provided at both ends of the conveying pipe (1).

2. The heating tube according to claim 1 is an indirect heater structure with a triangular cross section, characterized in that: A guide column (4) concentric with the conveying pipe (1) is provided inside the conveying pipe (1), and both ends of the guide column (4) are in a cone shape.

3. The heating tube according to claim 2 is an indirect heater structure with a triangular cross section, characterized in that: A first threaded step (5) is provided on the inner side wall of one end of the connecting flange (3) close to the conveying pipe (1); a first connecting ring (6) adapted to the inner cavity of the connecting flange (3) is threadedly connected to the first threaded step (5); a connecting rod (7) is fixedly connected between the first connecting ring (6) and the guide column (4).

4. The indirect heater structure of the heating tube having a triangular cross section according to claim 3, characterized in that: A plurality of limiting rods (8) are fixedly connected to the side of the guide column (4), and a plurality of limiting grooves (9) communicating with the outside are provided on the inner wall of the delivery pipe (1), and the limiting grooves (9) are adapted to the limiting rods (8).

5. The indirect heater structure of the heating tube having a triangular cross section according to claim 4, characterized in that: The cross sections of the connecting rod (7) and the limiting rod (8) are both rhombus-shaped.

6. The indirect heater structure of the heating tube having a triangular cross section according to claim 1, characterized in that: A second connecting ring (10) is fixedly connected to one end of the connecting flange (3) close to the delivery pipe (1), and second threaded steps (11) adapted to the second connecting ring (10) are provided on the inner side walls at both ends of the delivery pipe (1).

7. The indirect heater structure of the heating tube having a triangular cross section according to claim 6, characterized in that: A sealing ring (12) is provided between the second connecting ring (10) and the second threaded step (11).

8. The indirect heater structure of the heating tube having a triangular cross section according to claim 1, characterized in that: The number of the heating spiral tubes (2) is plural, and a plurality of the heating spiral tubes (2) are spirally wound in sequence on the side of the conveying tube (1).

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