Heat exchange tube spacing strip and heat exchanger comprising same
By designing a hollow fixed distance strip in a double-sloping structure with the same inclination angle as the spiral rise angle of the heat exchange tube, the problems of insufficient support, waste of materials and flow blocking of traditional fixed distance strips are solved, and more efficient heat exchange effects and simplified production processes are achieved.
Patent Information
- Application Number
- CN202421627726.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The fixed distance strips of traditional spiral winding tube heat exchangers cannot effectively support the spiral trend of the heat exchange tube, resulting in problems such as insufficient support, waste of materials, blocking of fluid flow and complex production processes.
A heat exchange tube fixed distance strip including the first fixed distance belt and the second fixed distance belt is designed. The second fixed distance belt forms several protrusions. The protruding inclined surface is in contact with the heat exchange tube, the inclined angle is the same as the spiral rise angle of the heat exchange tube. The protrusion of the fixed distance strip is a double inclined structure, a hollow structure, a moderate width, and a simple production process.
It achieves better support for heat exchange pipes, save materials, ensure that the flow of fluid is not hindered, simplifies production processes, and improves heat exchange efficiency.
Smart Images
Figure CN223036982U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of spirally wound tube heat exchangers, and in particular relates to a heat exchange tube distance bar and a heat exchanger comprising the distance bar. Background Art
[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.
[0003] Spiral wound tube heat exchangers are generally multi-layer spiral wound tube structures, with adjacent layers having opposite spiral directions. Large spiral wound tube heat exchangers have multiple heat exchange tubes wound on the same layer, and the heat exchange tubes do not touch each other, but have a suitable axial spacing (axial refers to the axial direction of the product cylinder). To maintain this axial spacing, a fixed spacing bar is required.
[0004] The distance bars of traditional products have many structural forms and also play the role of distance, but they all have some shortcomings; the main ones are: first, the distance bars do not reflect the spiral angle of the heat exchange tube and cannot conform to the spiral trend of the heat exchange tube; second, the width of the distance bars is small, the contact stress is large, and the support for the heat exchange tube is insufficient; third, the material thickness is large, which wastes materials; fourth, the distance bars block the flow of the fluid and reduce the heat exchange efficiency; fifth, the production process of the distance bars is complex, the equipment requirements are high, and the processing is difficult. Summary of the invention
[0005] In view of various problems existing in the prior art, the purpose of the utility model is to provide a heat exchange tube distance bar and a positioning device including the distance bar, which can
[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:
[0007] In the first aspect, an embodiment of the utility model provides a heat exchange tube distance strip, comprising a first distance band and a second distance band solidified together, wherein the first distance band is a straight band, and a plurality of protrusions are formed along the length direction of the second distance band, and the surface of each protrusion in contact with the heat exchange tube is an inclined surface, and the setting direction of the second distance band forms an inclination angle with the axis of the heat exchanger, and the inclination angle is the same as the spiral rise angle of the heat exchange tube, and the inclination direction is consistent with the spiral winding direction of the heat exchange tube.
[0008] As a further technical solution, the protrusion is a hollow structure.
[0009] As a further technical solution, the outer diameter of the heat exchange tube is D, the height of the bending protrusion is H, then D>H≥D / 2.
[0010] As a further technical solution, the spacing between adjacent protrusions is equal to the spacing between adjacent heat exchange tubes.
[0011] As a further technical solution, the thickness range of the first fixed-distance belt and the second fixed-distance belt is 0.3-3 mm, and the preferred range of the width W is 5-30 mm.
[0012] As a further technical solution, the first fixed-distance belt and the second fixed-distance belt are welded or riveted.
[0013] As a further technical solution, the protrusion is formed by bending the second fixed-distance belt.
[0014] In a second aspect, the present utility model also provides a heat exchanger, including the heat exchange tube fixed-distance strip described above.
[0015] As a further technical solution, the heat exchanger includes a mandrel, fixing rings are arranged at both ends of the mandrel, the fixing rings and the mandrel are connected by webs, both ends of the fixed-distance strip are fixed on two corresponding fixing rings, and along the circumferential direction of the fixing ring, multiple fixing rings are arranged.
[0016] As a further technical solution, the fixing rings are arranged in pairs, multiple pairs of fixing rings are arranged on the outer ring along the radial direction of the mandrel, and a circle of fixed-distance strips is arranged on each pair of fixing rings.
[0017] The beneficial effects of the above embodiments of the present utility model are as follows:
[0018] 1. The protrusion of the fixed-distance strip proposed by the present utility model has a double-inclined plane structure (both surfaces are in contact with the heat exchange tube, so it is a double-inclined plane). The double-inclined plane structure has high strength, small material thickness, and saves materials; and the angle of the inclined surface of the protrusion conforms to the spiral pitch angle of the heat exchange tube. The setting direction of the second fixed-distance belt forms an inclined angle with the axis of the heat exchanger, and the inclined angle is the same as the spiral pitch angle of the heat exchange tube, and the inclined direction is the same as the spiral winding direction of the heat exchange tube; it can fit the heat exchange tubes of the heat exchanger over a larger area and provide support for the heat exchange tubes.
[0019] 2. The fixed-distance strip proposed by the present utility model has a larger width and small contact stress, and can provide sufficient support for the heat exchange tubes;
[0020] 3. The protrusion of the fixed-distance strip proposed by the present utility model has a hollow structure, which does not hinder the flow of fluid along the direction of the heat exchange tube and does not affect the heat exchange efficiency;
[0021] 4. The fixed-distance strip proposed by the present utility model has simple production process, low requirements for equipment, and small processing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The attached drawings forming a part of this specification are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model.
[0023] Figure 1 It is a schematic diagram of the fixed-distance strip disclosed in Embodiment 1 of the present utility model;
[0024] Figure 2 It is a schematic diagram of the second fixed-distance belt disclosed in Embodiment 1 of the present utility model;
[0025] Figure 3 It is a schematic diagram of the cooperation between the fixed-distance strip and the heat exchange tube disclosed in Embodiment 1 of the present utility model Figure 1 ;
[0026] Figure 4 It is a schematic diagram of the cooperation between the fixed-distance strip and the heat exchange tube disclosed in Embodiment 1 of the present utility model Figure 2 ;
[0027] Figure 5 It is a schematic diagram of the usage state of the fixed-distance device disclosed in Embodiment 2 of the present utility model Figure 1 ;
[0028] Figure 6 It is a schematic diagram of the usage state of the fixed-distance device disclosed in Embodiment 2 of the present utility model Figure 2 ;
[0029] Figure 7 It is a schematic diagram of the usage state of the fixed-distance device disclosed in Embodiment 2 of the present utility model Figure 3 ;
[0030] In the figure: The distances or dimensions between each part are exaggerated for showing the positions of each part, and the schematic diagram is only for illustration.
[0031] 1 First steel belt, 2 Second steel belt, 3 Protrusion, 4 Heat exchange tube, 5 Outer-layer heat exchange tube, 6 Inner-layer heat exchange tube, 7 Fixed ring, 8 Fixed-distance strip, 9 Web, 10 Mandrel. Detailed implementation manners
[0032] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.
[0033] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the present utility model clearly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof;
[0034] For the convenience of description, if the words "upper" and "lower" appear in the present invention, they only indicate that they are consistent with the upper and lower directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.
[0035] As introduced in the background technology, the shortcomings in the prior art, in order to solve the above technical problems, the utility model proposes a heat exchange tube distance strip and a heat exchanger including the distance strip; the heat exchange tube distance strip includes a first distance strip and a second distance strip that are fixed together, the first distance strip is a straight strip, the second distance strip is formed with a plurality of protrusions, and the surface of the protrusion contacting the heat exchange tube is an inclined surface; and the setting direction of the second distance strip forms an inclined angle with the axis of the heat exchanger, and the inclined angle is parallel to the spiral rise angle of the heat exchange tube. The inclination direction is consistent with the spiral winding direction of the heat exchange tube; the protrusion is a double-bevel structure with high strength, small material thickness and material saving; and the protrusion conforms to the spiral rise angle of the heat exchange tube, and can fit the heat exchange tube in a larger area to provide support for the heat exchange tube; and the distance bar is relatively wide and has a small contact stress, which can provide sufficient support for the heat exchange tube; the protrusion of the distance bar is a hollow structure, which does not hinder the flow of the fluid along the direction of the heat exchange tube and does not affect the heat exchange efficiency; the production process of the distance bar is simple, the equipment requirements are low, and the processing difficulty is small.
[0036] The heat exchange tube distance strips are described in detail below with reference to specific drawings.
[0037] Example 1
[0038] In a typical implementation of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the heat exchange tube distance strip disclosed in this embodiment is composed of two layers of distance strips, and the two layers of distance strips are connected together by welding or riveting; in this embodiment, the first distance strip adopts the first steel strip 1 in the figure, and the second distance strip adopts the second steel strip 2 in the figure; the second steel strip 2 is located on the upper part of the first steel strip 1, and is arranged up and down, wherein the second steel strip 2 is formed with regularly bent protrusions 3, and the first steel strip 1 is a straight steel strip; the protrusion 3 includes two inclined surfaces in contact with the heat exchange tube 4, and the inclination directions of the two inclined surfaces are opposite, that is, the contact surface between the protrusion 3 and the heat exchange tube 4 is an inclined surface rather than a vertical surface, which can fit the heat exchange tube 4 with a larger area and provide support for the heat exchange tube 4;
[0039] Further, the second steel strip 2 is inclined with respect to the first steel strip 1, that is, the center line of the second steel strip 2 forms a certain angle with the center line of the first steel strip 1 and does not coincide. Specifically, in actual use, the first steel strip 1 is arranged along the axis direction of the heat exchanger, and a certain inclination angle is formed between the arrangement direction of the second steel strip 2 and the axis of the heat exchanger. The main purpose of such a design is to make the grooves formed by adjacent protrusions on the second steel strip 2 inclined with respect to the axis of the heat exchanger. Because when the heat exchange tube 4 is wound, it also has a certain helix angle. By inclining the second steel strip 2, the heat exchange tube 4 can be better supported. Preferably, the inclination angle between the second steel strip 2 and the axis of the heat exchanger is the same as the helix angle of the heat exchange tube 4, and the inclination direction is the same as the helical winding direction of the heat exchange tube 4; as Figure 4 shown, if the helix angle of the heat exchange tube 4 is α, then the inclination angle between the second steel strip 2 and the axis of the heat exchanger is also α. The part of the second steel strip 2 without bent protrusions can accommodate the heat exchange tube 4; and since both surfaces of the protrusion 3 are in contact with the heat exchange tube 4, it is a double inclined surface structure. The double inclined surface structure has high strength, small material thickness, and saves materials.
[0040] Further, the distance between the bent protrusions 3 of the second steel strip 2 is N, and the distance between the heat exchange tubes 4 of the heat exchanger is M. In order to accurately control the distance between the heat exchange tubes 4, it is necessary to satisfy N = M.
[0041] Further, the outer diameter of the heat exchange tube 4 is D, and the height of the bent protrusion is H. In order to better prevent the heat exchange tube 4 from slipping out, it is preferably selected that D > H ≥ D / 2.
[0042] Further, in this embodiment, for the second steel strip 2 and the first steel strip 1, the preferred range of their thickness is 0.3 - 3 mm, and the preferred range of the width W is 5 - 30 mm. The length is based on product requirements and is generally between 0.5 - 50 meters; therefore, the second steel strip 2 and the first steel strip 1 have a larger width and a smaller contact stress, and can provide sufficient support for the heat exchange tube 4.
[0043] Further, as Figure 2 shown, the protrusion 3 of the spacing strip proposed by the present utility model is a hollow structure, which does not prevent the fluid from flowing along the direction of the heat exchange tube and does not affect the heat exchange efficiency.
[0044] Further, preferably, the materials of the second steel strip 2 and the first steel strip 1 are selected corresponding to the material of the heat exchange tube, and are generally carbon steel, stainless steel, aluminum alloy, titanium and titanium alloys, nickel-based alloys, etc.
[0045] Further, preferably, the second steel strip 2 and the first steel strip 1 can be connected by welding or riveting. The tightly fitting part of the second steel strip 2 and the first steel strip 1 is the welding point or the riveting point;
[0046] Preferably, before being bent, the second steel strip 2 is a straight steel strip with neat edges, so as to save steel strip materials. After being bent, the edges of the steel strip are no longer neat, but this does not affect its use.
[0047] The fixed-distance strip disclosed in this embodiment is located between the inner and outer layers of the winding pipe. The bent protrusion 3 faces the outer heat exchange pipe 5 and plays a role in fixing the distance between the heat exchange pipes. The inclination angle of the protrusion conforms to the spiral lift angle of the heat exchange pipe. There are multiple fixed-distance strips in each layer, generally between 3 and 30, and they are evenly distributed in a ring shape.
[0048] Embodiment 2
[0049] This embodiment provides a heat exchanger including the fixed-distance strip in Embodiment 1, as Figure 5 、 Figure 6 、 Figure 7 shown. The fixed-distance device of this heat exchanger includes a mandrel 10. Fixed rings 7 are provided at both ends of the mandrel 10. The fixed rings 7 and the mandrel 10 are connected by webs 9. Both ends of the fixed-distance strip 8 are fixed on two corresponding fixed rings, and multiple fixed-distance strips are arranged along the circumferential direction of the fixed rings; the fixed rings 7 are arranged in pairs, and multiple pairs of fixed rings can be arranged along the radial direction of the mandrel 10, and a circle of fixed-distance strips 8 is arranged on a pair of fixed rings 7.
[0050] Specifically, both ends of the fixed-distance strip 8 are fixed on the fixed ring 7 by welding. The two fixed rings 7 are fixed on the web 9, and multiple webs 9 are welded and fixed on the mandrel 10 evenly in a circle.
[0051] When the heat exchange pipes are about to be wound, the first step is to weld the first circle of fixed-distance strips 8 on the mandrel 10 first, and then the first layer of heat exchange pipes (such as the inner heat exchange pipe 6 in the figure) is wound on the mandrel 10 and presses on the fixed-distance strips 8, and the fixed pitch is maintained by relying on the fixed-distance strips 8; after the first layer of heat exchange pipes is wound, the second circle of heat exchange pipe fixed-distance strips 8 is arranged on its periphery, and then the second layer of heat exchange pipes (such as the outer heat exchange pipe 5 in the figure) is continued to be wound, and so on.
[0052] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A heat exchange tube distance bar, characterized in that: It includes a first distance band and a second distance band that are fixed together, the first distance band is a straight band, and the second distance band is formed with a plurality of protrusions along its length direction, and the surface of each protrusion in contact with the heat exchange tube is an inclined surface; and the setting direction of the second distance band forms an inclination angle with the axis of the heat exchanger, the inclination angle is the same as the spiral rise angle of the heat exchange tube, and the inclination direction is consistent with the spiral winding direction of the heat exchange tube.
2. A heat exchange tube distance bar according to claim 1, characterized in that: The protrusion is a hollow structure.
3. A heat exchange tube distance bar according to claim 1, characterized in that: The outer diameter of the heat exchange tube and the height of the bending protrusion satisfy D>H≥D / 2, wherein D is the outer diameter of the heat exchange tube, and H is the height of the bending protrusion.
4. A heat exchange tube distance bar according to claim 1, characterized in that: The distance between adjacent protrusions is equal to the distance between adjacent heat exchange tubes.
5. The heat exchange tube distance bar according to claim 1, characterized in that: The first distance tape and the second distance tape have a thickness ranging from 0.3 to 3 mm and a width ranging from 5 to 30 mm.
6. A heat exchange tube distance bar according to claim 1, characterized in that: The first distance belt and the second distance belt are welded or riveted.
7. A heat exchange tube distance bar according to claim 1, characterized in that: The protrusion is formed by bending the second distance belt.
8. A heat exchanger, characterized in that: It comprises the heat exchange tube distance strip described in any one of claims 1-7.
9. The heat exchanger according to claim 8, characterized in that It includes a core shaft, and fixing rings are arranged at both ends of the core shaft. The fixing rings are connected to the core shaft through a web. The two ends of the distance bar are fixed on two corresponding fixing rings, and multiple fixing rings are arranged along the circumferential direction of the fixing rings.
10. The heat exchanger according to claim 9, characterized in that The fixing rings are arranged in pairs, and multiple pairs of fixing rings are arranged on the outer ring of the core shaft along the radial direction thereof, and a circle of distance strips is arranged on each pair of fixing rings.