Collecting cover of shell and tube heat exchanger with nichrome medium tube stack
By using a manifold for the nickel-chromium alloy medium tube assembly in the heat exchanger, the problems of complex welding and leakage of U-joints were solved, achieving more efficient heat exchange and a simplified installation process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO KAITUO LONGHAI ENERGY SAVING TECHNOLOGY CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-05-19
AI Technical Summary
Traditional heat exchangers have complex U-shaped joints that are difficult to weld, have high production costs, and are prone to leakage. The short medium flow also leads to low heat exchange efficiency.
A manifold using a nickel-chromium alloy medium tube assembly is constructed by opening a groove inside the tube sheet and connecting the manifold and the tube sheet with a brazing filler layer. A second manifold is added to replace the U-shaped joint, forming a loop-shaped pipeline, which simplifies the welding process and extends the medium flow path.
It reduces the probability of welding leaks, improves heat exchange efficiency, simplifies the installation process, and enhances welding strength and sealing performance.
Smart Images
Figure CN224262289U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of heat exchanger manufacturing technology, and specifically relates to a manifold for a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly. Background Technology
[0002] A heat exchanger is an energy-saving device that enables heat transfer between two or more fluids at different temperatures. It transfers heat from a higher-temperature fluid to a lower-temperature fluid, bringing the fluid temperature to the specified parameters of the process to meet the requirements of the process conditions.
[0003] A heat exchanger consists of a shell composed of multiple tube sheets, tube bundles, baffles, an inlet shroud, and an outlet shroud.
[0004] Traditional heat exchanger tube assemblies consist of short connecting pipes, straight pipes, and U-joints. To facilitate the flow of the medium within the tube assembly through the inlet and outlet sump, multiple sets of U-joints are required. Figure 7 As shown.
[0005] The U-shaped joint is relatively complex to manufacture. It requires multiple welding points between the U-shaped joint and the short pipe and the straight pipe. During welding, it needs to be welded row by row from high to low. When the first row is welded and the second row is welded, the residual heat of the flame will be generated. Due to the large pipe spacing, the residual heat will affect the welding of the first row and form a leak point. Therefore, it requires highly skilled workers to perform professional welding, which results in very high production costs. Even so, it is still impossible to completely avoid the occurrence of leak points.
[0006] Meanwhile, the medium flows through a relatively short distance through the pipe assembly, resulting in a shorter contact time between the medium inside and outside the pipe, leading to lower heat exchange efficiency. Utility Model Content
[0007] In view of the problems existing in the background art, the present invention provides a manifold for a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly, comprising,
[0008] At least one set of first flow fairings;
[0009] At least one second fairing;
[0010] At least one third fairing;
[0011] Tube sheet;
[0012] The first, second, and third shrouds are all equipped with shroud shells.
[0013] The tube sheet is provided with a groove;
[0014] The current collector shroud extends into the tank body.
[0015] Furthermore, a brazing filler layer is provided between the outer wall of the current collector housing extending into the tank and the tank body.
[0016] The connection between the manifold and the tube sheet is achieved through the brazing filler layer.
[0017] Optionally, the length of the current collection shroud extending into the tank is 1-6 mm.
[0018] Optionally, at least one set of first channels is provided inside the tube sheet located at the first manifold position.
[0019] The first channel is connected to any one group of media tubes in the media tube group.
[0020] Optionally, a first cavity is provided between the first manifold and the tube sheet.
[0021] Furthermore, the first cavity is connected to the first delivery pipe and the first channel, respectively.
[0022] The first delivery pipe is located at the end of the medium inlet of the first collector.
[0023] Optionally, at least one set of third channels is provided inside the tube sheet located at the position of the third manifold;
[0024] The third channel is connected to any one group of media tubes in the media tube group;
[0025] A third cavity is provided between the third manifold and the tube sheet.
[0026] Furthermore, the third cavity is connected to the second delivery pipe and the third channel respectively.
[0027] Optionally, a second cavity is provided between the second manifold and the tube sheet.
[0028] Furthermore, the second cavity is connected to the medium tubes that are connected to the first and third channels respectively.
[0029] Optionally, both the tube sheet and the manifold are made of metal.
[0030] In summary, the beneficial effects of this utility model are:
[0031] (1) This utility model achieves the connection between the tube sheet and the tube sheet by opening a groove in the tube sheet and by using the brazing filler layer to cooperate with the tube sheet and the manifold. Thus, this utility model achieves the addition of a second manifold. By adding a second manifold, the U-shaped joint of the traditional range extender is replaced. The installation is simple. When the integrated welding is carried out in the brazing furnace, all the welding points are concentrated on the tube sheet, reducing the number of welding points and thus greatly reducing the probability of leakage.
[0032] (2) By adding a second manifold to replace the U-shaped joint of the traditional range extender pipeline, the flow path of the medium is increased, which increases the contact time between the medium inside the pipe and the medium outside the pipe and improves the heat exchange efficiency. Attached Figure Description
[0033] Figure 1 This is a schematic diagram of the overall structure of a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly according to this utility model.
[0034] Figure 2 This is a schematic diagram of an embodiment of the manifold of a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly according to this utility model.
[0035] Figure 3 This is a two-dimensional diagram of an embodiment of a manifold for a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly according to this utility model.
[0036] Figure 4 This is an enlarged view of the second manifold structure of an embodiment of a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly according to the present invention.
[0037] Figure 5 This is an enlarged view of the tube sheet structure without a shroud in an embodiment of a shell-and-tube heat exchanger with a nickel-chromium alloy medium tube assembly according to the present invention.
[0038] Figure 6 This is a two-dimensional view of the overall structure of a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly according to this utility model.
[0039] Figure 7 This is an assembly diagram of a traditional media tube assembly and manifold.
[0040] Figure label:
[0041] 1. First delivery pipe; 2. First manifold; 3. Second manifold; 4. Third manifold; 5. Tube sheet; 6. Second delivery pipe; 7. First medium port; 8. Second medium port; 9. First cavity; 10. Second cavity; 11. Third cavity; 12. Brazing filler layer; 13. Second channel; 14. First channel; 15. Third channel. Detailed Implementation
[0042] like Figure 1-6As shown, this embodiment provides a flow collector shroud for a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly, including at least one set of first flow collector shroud 2, second flow collector shroud 3 and third flow collector shroud 4. The first flow collector shroud 2, second flow collector shroud 3 and third flow collector shroud 4 each include a flow collector shroud shell. The flow collector shroud shell extends into a groove 18 formed on a tube sheet 5, and a brazing filler layer 12 is provided between the outer wall of the flow collector shroud shell extending into the groove 18 and the groove 18, thereby realizing the connection between the flow collector shroud and the tube sheet 5.
[0043] During welding, the high temperature inside the brazing furnace melts the filler metal layer 12, causing the filler metal to slowly fill the gap by adsorption (wetting the weld bead), thus achieving the connection between the tube sheet and the manifold shell and meeting the welding requirements.
[0044] Furthermore, the brazing filler layer can be selected from bronze alloy flux, copper flux, or silver-based flux, etc.
[0045] Furthermore, the length of the manifold extending into the tank 18 is 1-6 mm, preferably 3 ± 0.1 mm. When the length of the manifold extending into the tank is 3 ± 0.1 mm, sufficient contact area between the manifold and the tube sheet can be ensured. This helps the brazing filler layer to fully wet the weld bead during welding, forming a more robust connection, thereby improving the strength and sealing performance of the weld joint and avoiding the risk of joint loosening or leakage.
[0046] Furthermore, a first cavity 9 is provided between the first flow collector 2 and the tube sheet 5, and the first cavity 9 is connected to the first delivery pipe 1 and the first channel 14 respectively. The first channel 14 is provided inside the tube sheet 5 and is connected to any group of medium pipes in the medium pipe group.
[0047] A third cavity 11 is provided between the third collector shroud 4 and the tube sheet 5, and the third cavity 11 is connected to the second delivery pipe 6 and the third channel 15 respectively. The third channel 15 is located inside the tube sheet 5 and is connected to any group of medium pipes in the medium pipe group.
[0048] A second cavity 10 is provided between the second manifold 3 and the tube sheet 5, and the medium tubes connected to the first channel 14 and the third channel 15 are respectively connected through the second cavity 10. The second manifold 3 is provided to achieve communication between the first manifold 2 and the second manifold 3.
[0049] In this embodiment, at least two sets of second channels 13 are provided in the tube sheet connected to the second cavity 10, and the second channels 13 are respectively connected to the medium tube connected to the first channel 14 and the medium tube connected to the third channel 15.
[0050] In this embodiment, those skilled in the art should understand that the present invention, by adding a second manifold 3 and a third channel within the tube sheet, connects the second cavity and the medium tubes connected to the first and third cavities respectively, thereby forming a loop-shaped pipeline for the medium tube assembly. For example:
[0051] When the medium is input into the first cavity (either the first or the third cavity) through any one of the conveying pipes (either the first or the second conveying pipe), it is then conveyed to the second cavity 10 through the medium pipe connected to it. It then flows into the medium pipe connected to the third cavity (either the first or the third cavity) through the second cavity, and is then conveyed to the third cavity through the medium pipe connected to the third cavity, thus forming a complete circuit.
[0052] Furthermore, the channel is arranged in a stepped shape, with the channel near the medium tube group having a diameter of 6.8 mm and the channel away from the medium tube group having a diameter of 4.94 mm, and the length of the channel (first channel, second channel, or third channel) is 14 mm.
[0053] In this embodiment, a groove is opened in the tube sheet, and the brazing filler layer cooperates with the tube sheet and the manifold to achieve the connection between the manifold and the tube sheet. Thus, the present invention realizes the addition of a second manifold, and by adding a second manifold, the U-shaped joint of the traditional range extender pipeline is replaced, which simplifies the installation. When the integrated welding is carried out in the brazing furnace, all the welding points are concentrated on the tube sheet, reducing the number of welding points and thus greatly reducing the probability of leakage.
[0054] This invention adds a second manifold to replace the U-shaped joint of the traditional range extender pipeline, thereby increasing the flow path of the medium, increasing the contact time between the medium inside and outside the pipe, and improving the heat exchange efficiency.
[0055] Furthermore, the first and third flow collectors are generally trapezoidal in shape, and the diameter of the medium port near the delivery pipe (first or second delivery pipe) is smaller than the diameter of the medium port near the channel (first or third channel). The trapezoidal structure effectively guides the flow direction of the fluid and reduces turbulence within the flow collectors.
[0056] The second shroud can be quadrilateral, circular, or other shapes.
[0057] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Although exemplary embodiments are disclosed in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to facilitate a more thorough understanding of the present utility model and to fully convey the concept of the present utility model to those skilled in the art.
[0058] In the description of this specification, the references to terms such as "certain embodiments," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0059] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not restrictive. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model do not depart from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A manifold for a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly, characterized in that, include, At least one set of first flow fairings; At least one second fairing; At least one third fairing; Tube sheet; The first, second, and third shrouds are all equipped with shroud shells. The tube sheet is provided with a groove; The flow collector shroud extends into the tank body. Furthermore, a brazing filler layer is provided between the outer wall of the current collector housing extending into the tank and the tank body. The connection between the manifold and the tube sheet is achieved through the brazing filler layer; The length of the current collection shroud extending into the tank is 1-6 mm; At least one set of first channels is provided inside the tube sheet located at the position of the first flow collector; At least one set of third channels is provided inside the tube sheet located at the position of the third manifold; The first and third channels are arranged in a stepped shape.
2. The manifold of a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly according to claim 1, characterized in that, The first channel is connected to any one group of media tubes in the media tube group.
3. The manifold of a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly according to claim 2, characterized in that, A first cavity is provided between the first flow collector and the tube sheet. Furthermore, the first cavity is connected to the first delivery pipe and the first channel, respectively. The first delivery pipe is located at the end of the medium inlet of the first collector.
4. The manifold of a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly according to claim 3, characterized in that, The third channel is connected to any one group of media tubes in the media tube group; A third cavity is provided between the third manifold and the tube sheet. Furthermore, the third cavity is connected to the second delivery pipe and the third channel respectively.
5. The manifold of a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly according to claim 4, characterized in that, A second cavity is provided between the second manifold and the tube sheet. Furthermore, the second cavity is connected to the medium tubes that are connected to the first and third channels respectively.
6. The manifold of a shell-and-tube heat exchanger equipped with a nickel-chromium alloy medium tube assembly according to claim 5, characterized in that, Both the tube sheet and the manifold are made of metal.