Multi-stream tube sheet and heat exchanger
By designing a multi-strand tube box, the arrangement and connection of heat exchange tubes are simplified, solving the problems of high winding difficulty and complex maintenance, and achieving high-precision manufacturing and low-cost maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HIMILE MECHANICAL MFG
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-29
AI Technical Summary
The irregular arrangement of tube bundles in existing multi-flow heat exchangers increases the difficulty of winding, and the connection between the tube bundles and the tube box is complex, resulting in high maintenance costs.
Design a multi-flow tube box, including tube sheet, inner end cap, baffle and outer end cap, forming an annular outer chamber and inner chamber. The two ends of the heat exchange tube are fixed in the corresponding annular area, simplifying the connection structure, and maintenance can be achieved by disassembling the outer end cap and inner end cap.
It reduces the difficulty of heat exchanger tube winding, improves manufacturing precision, simplifies the maintenance process, reduces maintenance costs, and avoids temperature influence between processes.
Smart Images
Figure CN224302882U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of heat exchanger technology, specifically relating to a multi-stream tube box and heat exchanger. Background Technology
[0002] Multi-stream heat exchangers (such as multi-pass shell-and-tube heat exchangers) have some problems in tube box design. Among them, patent CN211448957U discloses an integrated centralized cooling device for multi-stream gas, which has the following defects:
[0003] High winding difficulty: The irregular arrangement of tube bundles in each stage increases the difficulty of winding the tube bundles around the central cylinder, affects manufacturing accuracy, and may lead to a large deviation between the calculated simulation and the actual flow.
[0004] Inconvenient maintenance: The connection structure of the tube bundle and tube box is complex, and multiple sets of flanges or end caps need to be disassembled during maintenance, which increases maintenance costs. Utility Model Content
[0005] To address the problems of complex tube bundle arrangement and complex connection between tube bundle and tube box in existing multi-flow heat exchangers, this utility model provides a multi-flow tube box.
[0006] A multi-flow tube box includes a tube sheet, an inner end cap, a partition plate, and an outer end cap. The partition plate has a cylindrical structure. The inner end cap, the partition plate, and the outer end cap are fixedly arranged on the same side of the tube sheet in a radial direction from the inside to the outside. The end of the outer end cap away from the tube sheet is fixedly connected to the partition plate.
[0007] The outer end cap, partition, and tube sheet form an annular outer cavity; the partition and inner end cap form an annular processing cavity; and the inner end cap and tube sheet form an inner cavity.
[0008] The annular area of the tube sheet directly opposite the outer chamber is the area for setting the heat exchange tubes of the outer chamber, and the area of the tube sheet directly opposite the inner chamber is the area for setting the heat exchange tubes of the inner chamber.
[0009] The inner end of the inner end cap, away from the tube sheet, is provided with an inner cavity opening, and the outer end cap is provided with an outer cavity opening.
[0010] Preferably, the central region of the tube sheet is the central cylinder setting region, and the annular region of the tube sheet between the inner end cap and the central cylinder is the inner chamber heat exchange tube setting region.
[0011] Preferably, a cylindrical section is coaxially fixed at the end of the outer end cap facing the tube sheet, the end of the cylindrical section away from the outer end cap is fixedly connected to the tube sheet, and the outer cavity is located on the cylindrical section.
[0012] Preferably, the annular region of the tube sheet directly opposite the outer chamber is divided into several first regions and several second regions, and the first regions and second regions are arranged alternately along the circumferential direction;
[0013] The first area is the area where the heat exchange tubes of the outer chamber are installed.
[0014] This utility model also provides a multi-stream heat exchanger.
[0015] A multi-stream heat exchanger includes a shell and a central cylinder. Shell-side medium ports are provided at the upper and lower ends of the shell, and multi-stream tube boxes are symmetrically arranged at both ends of the axial direction of the shell.
[0016] The shell is provided with a plurality of outer chamber heat exchange tubes surrounding the outside of the central cylinder and a plurality of inner chamber heat exchange tubes surrounding the outside of the central cylinder.
[0017] Both ends of the outer chamber heat exchange tube are fixed to the outer chamber heat exchange tube setting area of the corresponding tube sheet and are connected to the corresponding outer chamber.
[0018] Both ends of the inner chamber heat exchange tube are fixed to the inner chamber heat exchange tube setting area of the corresponding tube sheet and are connected to the corresponding inner chamber.
[0019] This utility model also provides a multi-stream heat exchanger.
[0020] A multi-stream heat exchanger includes a shell and a central cylinder. Shell-side medium ports are provided at the upper and lower ends of the shell, and multi-stream tube boxes are symmetrically arranged at both ends of the axial direction of the shell.
[0021] The shell contains several sets of outer chamber tube bundles surrounding the central cylinder, several sets of inner chamber tube bundles surrounding the central cylinder, and several sets of shell tube bundles surrounding the central cylinder. Each of the outer chamber tube bundles, inner chamber tube bundles, and shell tube bundles includes several heat exchange tubes.
[0022] The shell space corresponding to the second region is the shell heat exchange tube installation area. The upper and lower ends of the shell space corresponding to the second region are provided with pipe fittings for serving as medium inlet and outlet of the shell heat exchange tube.
[0023] The two ends of the heat exchange tubes in the outer chamber tube bundle are fixed to the first region of the corresponding tube sheet and connected to the corresponding outer chamber;
[0024] The two ends of the heat exchange tubes in the inner chamber tube bundle are fixed to the inner chamber heat exchange tube setting area of the corresponding tube sheet and are connected to the corresponding inner chamber.
[0025] The two ends of the heat exchange tubes in the shell tube bundle are connected to the corresponding connecting pipe assemblies.
[0026] Preferably, the tube sheet is provided inside the tube assembly, and the two ends of the heat exchange tubes in the shell tube bundle are fixedly connected to the corresponding tube sheet.
[0027] Preferably, the tube sheet is a forged tube sheet.
[0028] The beneficial effects of this utility model are:
[0029] (1) In this utility model, since the outer chamber heat exchange tube setting area and the inner chamber heat exchange tube setting area on the tube sheet are both annular areas, the two ends of each heat exchange tube are fixed on the corresponding annular area on the tube sheet, which reduces the irregularity of the heat exchange tube arrangement in each pass, thereby reducing the difficulty of winding the heat exchange tube around the central cylinder, reducing the manufacturing difficulty and improving the precision.
[0030] (2) In this utility model, each heat exchange tube is directly fixedly connected to the tube sheet. The connection structure is simple. During maintenance, only the outer end and inner end need to be disassembled. Maintenance is convenient and the maintenance cost is low.
[0031] (3) In this utility model, the partition and processing cavity are set to isolate the inner and outer cavities, avoiding mutual influence between the inlet and outlet temperatures of the two processes; and the processing cavity facilitates the welding, fixing and inspection of various components on the tube sheet. Attached Figure Description
[0032] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.
[0033] Figure 1 This is a schematic diagram of the structure of the multi-stream tube box in Embodiment 1 of this utility model;
[0034] Figure 2 yes Figure 1 Sectional view along axis AA;
[0035] Figure 3 This is a schematic diagram of the structure of the multi-stream tube box with cylindrical sections in Embodiment 1 of this utility model;
[0036] Figure 4 This is a schematic diagram of the structure of the multi-stream tube box in Embodiment 2 of this utility model;
[0037] Figure 5 yes Figure 4 BB-direction sectional view;
[0038] in:
[0039] 1. Tube sheet; 2. Inner end cap; 21. Inner cavity opening; 3. Partition; 4. Outer end cap; 41. Outer cavity opening; 42. Cylindrical section; 5. Outer chamber; 51. First region; 52. Second region; 6. Processing chamber; 7. Inner chamber; 8. Connecting pipe assembly; 81. Small tube sheet; 9. Shell. Detailed Implementation
[0040] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0041] Example 1:
[0042] like Figure 1 , Figure 2 As shown, a multi-flow tube box includes a tube sheet 1, an inner end cap 2, a partition plate 3, and an outer end cap 4. The partition plate 3 has a cylindrical structure. The inner end cap 2, the partition plate 3, and the outer end cap 4 are fixedly arranged on the same side of the tube sheet 1 in a radial direction from the inside to the outside. The end of the outer end cap 4 away from the tube sheet 1 is fixedly connected to the partition plate 3.
[0043] The outer end cap 4, the partition 3, and the tube sheet 1 form an annular outer cavity 5; the partition 3 and the inner end cap 2 form an annular processing cavity 6; and the inner end cap 2 and the tube sheet 1 form an inner cavity 7.
[0044] The annular area of the tube sheet 1 directly opposite the outer chamber 5 is the area for setting the heat exchange tubes in the outer chamber, and the area of the tube sheet 1 directly opposite the inner chamber 7 is the area for setting the heat exchange tubes in the inner chamber.
[0045] The inner end of the inner head 2, away from the tube sheet 1, is provided with an inner cavity port 21, which serves as the inlet and outlet of the inner cavity medium. The outer head 4 is provided with an outer cavity port 41, which serves as the inlet and outlet of the outer cavity medium.
[0046] Preferably, the central region of the tube sheet 1 is the central cylinder setting region, and the annular region of the tube sheet 1 between the inner end cap 2 and the central cylinder is the inner chamber heat exchange tube setting region.
[0047] Preferred, such as Figure 3 As shown, a cylindrical section 42 is coaxially fixed at one end of the outer end cap 4 facing the tube sheet 1, and the end of the cylindrical section 42 away from the outer end cap 4 is fixedly connected to the tube sheet 1. The outer cavity 41 is provided on the cylindrical section 42.
[0048] Example 2:
[0049] Based on Example 1, such as Figure 4 , Figure 5 As shown, the annular region of the tube sheet 1 directly opposite the outer chamber 5 is divided into several first regions 51 and several second regions 52, and the first regions 51 and second regions 52 are arranged alternately along the circumferential direction.
[0050] The first area 51 is the area where the heat exchange tubes of the outer chamber are installed.
[0051] Example 3:
[0052] A multi-stream heat exchanger includes a shell 9 and a central cylinder. Shell-side medium ports are provided at the upper and lower ends of the shell 9, and multi-stream tube boxes as described in Embodiment 1 are symmetrically arranged at both ends of the axial direction of the shell 9.
[0053] The housing 9 is provided with a plurality of outer chamber heat exchange tubes surrounding the outside of the central cylinder and a plurality of inner chamber heat exchange tubes surrounding the outside of the central cylinder.
[0054] Both ends of the outer chamber heat exchange tube are fixed to the outer chamber heat exchange tube setting area of the corresponding tube sheet 1 and are connected to the corresponding outer chamber 5.
[0055] Both ends of the inner chamber heat exchange tube are fixed to the inner chamber heat exchange tube setting area of the corresponding tube sheet 1 and are connected to the corresponding inner chamber 7.
[0056] In the multi-flow heat exchanger of Example 3, the heat exchange shell side is formed by the medium inlet on one side, the shell 9, and the medium inlet on the other side. The first heat exchange tube side is formed by the inner cavity inlet on one side, the inner cavity heat exchange tube on one side, the inner cavity heat exchange tube on the other side, and the inner cavity inlet on the other side. The second heat exchange tube side is formed by the outer cavity inlet on one side, the outer cavity heat exchange tube on one side, the outer cavity heat exchange tube on the other side, and the outer cavity in the other side. Therefore, dual-flow heat exchange can be achieved.
[0057] Example 4:
[0058] A multi-stream heat exchanger includes a shell 9 and a central cylinder. Shell-side medium ports are provided at the upper and lower ends of the shell 9, and multi-stream tube boxes as described in Embodiment 2 are symmetrically arranged at both ends of the axial direction of the shell 9.
[0059] The shell 9 is provided with several sets of outer chamber tube bundles surrounding the outside of the central cylinder, several sets of inner chamber tube bundles surrounding the outside of the central cylinder, and several sets of shell tube bundles surrounding the outside of the central cylinder. The outer chamber tube bundles, inner chamber tube bundles, and shell tube bundles all include several heat exchange tubes.
[0060] The shell space corresponding to the second region 52 is the shell heat exchange tube installation area. The upper and lower ends of the shell space corresponding to the second region 52 are provided with pipe assembly 8 for serving as medium inlet and outlet of the shell heat exchange tube.
[0061] The two ends of the heat exchange tubes in the outer chamber tube bundle are fixed to the first region 51 of the corresponding tube sheet 1 and connected to the corresponding outer chamber 5.
[0062] The two ends of the heat exchange tubes in the inner chamber tube bundle are fixed to the inner chamber heat exchange tube setting area of the corresponding tube sheet 1 and are connected to the corresponding inner chamber 7.
[0063] The two ends of the heat exchange tubes in the shell tube bundle are connected to the corresponding connecting pipe assembly 8.
[0064] Preferably, the connecting pipe assembly 8 is provided with a small tube sheet 81, and both ends of the heat exchange tubes in the shell tube bundle are fixedly connected to the corresponding small tube sheet 81. The small tube sheet 81 is used to connect the corresponding shell heat exchange tubes, and the ends of multiple shell heat exchange tubes can converge through the corresponding small tube sheet 81, which greatly improves the connection strength of the heat exchange tubes.
[0065] Preferably, the small tube sheet 81 is a forged tube sheet.
[0066] In the multi-flow heat exchanger of Example 4, the shell-side medium inlet on one side, the shell 9, and the medium inlet on the other side form the heat exchange shell side. The inner cavity inlet on one side, the inner chamber on one side, the inner chamber heat exchange tubes, the inner chamber on the other side, and the inner cavity inlet on the other side form the first heat exchange tube side. The outer cavity inlet on one side, the outer chamber on one side, the various outer chamber tube bundles, the outer chamber on the other side, and the outer cavity inlet on the other side form the second heat exchange tube side. Each shell tube bundle and its corresponding connecting pipe assembly 8 form a shell heat exchange tube side. When all the inlets of all the shell heat exchange tube sides are connected to the same heat exchange medium inlet and all the outlets of all the shell heat exchange tube sides are connected to the same heat exchange medium outlet, all the shell heat exchange tube sides form a third heat exchange tube side, thus enabling three-flow heat exchange. When the inlet of each shell heat exchange tube side is connected to a different heat exchange medium inlet and the outlet is connected to a different heat exchange medium outlet, each shell heat exchange tube side forms an independent heat exchange tube side, thus enabling multi-flow heat exchange.
[0067] In this application, since both the outer chamber heat exchange tube setting area and the inner chamber heat exchange tube setting area on the tube sheet 1 are annular areas, the two ends of each heat exchange tube are fixed on the corresponding annular area on the tube sheet 1, which reduces the irregularity of the heat exchange tube arrangement in each pass, thereby reducing the difficulty of winding the heat exchange tube around the central cylinder, reducing the manufacturing difficulty and improving the precision.
[0068] In this application, each heat exchange tube is directly fixedly connected to the tube sheet 1. The connection structure is simple, and only the outer end cap 4 and the inner end cap 2 need to be disassembled during maintenance. The maintenance is convenient and the maintenance cost is low.
[0069] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, they are not intended to limit the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the protection scope of the present utility model.
Claims
1. A multi-flow tube box, characterized in that, It includes a tube sheet (1), an inner end cap (2), a partition plate (3), and an outer end cap (4). The partition plate (3) has a cylindrical structure. The inner end cap (2), the partition plate (3), and the outer end cap (4) are fixedly arranged on the same side of the tube sheet (1) in a radial direction from the inside to the outside. The end of the outer end cap (4) away from the tube sheet (1) is fixedly connected to the partition plate (3). An annular outer chamber (5) is formed between the outer end cap (4), the partition plate (3), and the tube sheet (1); an annular processing cavity (6) is formed between the partition plate (3) and the inner end cap (2); and an inner chamber (7) is formed between the inner end cap (2) and the tube sheet (1). The annular area of the tube sheet (1) directly opposite the outer chamber (5) is the area for setting the heat exchange tubes in the outer chamber, and the area of the tube sheet (1) directly opposite the inner chamber (7) is the area for setting the heat exchange tubes in the inner chamber. An inner cavity (21) is provided at the end of the inner end cap (2) away from the tube sheet (1), and an outer cavity (41) is provided on the outer end cap (4).
2. The multi-flow tube box as described in claim 1, characterized in that, The central area of the tube sheet (1) is the central tube setting area, and the annular area of the tube sheet (1) between the inner end cap (2) and the central tube is the inner chamber heat exchange tube setting area.
3. The multi-flow tube box as described in claim 2, characterized in that, The outer end cap (4) facing the tube sheet (1) is coaxially fixedly provided with a cylindrical section (42), and the end of the cylindrical section (42) away from the outer end cap (4) is fixedly connected to the tube sheet (1). The outer cavity (41) is provided on the cylindrical section (42).
4. The multi-flow tube box as described in claim 2, characterized in that, The annular region of the tube sheet (1) directly opposite the outer chamber (5) is divided into several first regions (51) and several second regions (52), and the first regions (51) and second regions (52) are arranged alternately along the circumference. The first area (51) is the area where the heat exchange tubes of the outer chamber are installed.
5. A multi-flow heat exchanger, comprising a shell (9) and a central cylinder, wherein shell-side medium ports are provided at both the upper and lower ends of the shell (9), characterized in that, The housing (9) is symmetrically provided with multi-stream tube boxes as described in any one of claims 2 to 3 at both ends of its axial direction; The shell (9) is provided with a plurality of outer chamber heat exchange tubes surrounding the outside of the central cylinder and a plurality of inner chamber heat exchange tubes surrounding the outside of the central cylinder. The two ends of the outer chamber heat exchange tube are fixed to the outer chamber heat exchange tube setting area of the corresponding tube sheet (1) and connected to the corresponding outer chamber (5); Both ends of the inner chamber heat exchange tube are fixed to the inner chamber heat exchange tube setting area of the corresponding tube sheet (1) and connected to the corresponding inner chamber (7).
6. A multi-flow heat exchanger, comprising a shell (9) and a central cylinder, wherein shell-side medium ports are provided at both the upper and lower ends of the shell (9), characterized in that, The housing (9) is symmetrically provided with multi-strand flow tube boxes as described in claim 4 at both ends of its axial direction; The shell (9) is provided with several sets of outer chamber tube bundles surrounding the outside of the central cylinder, several sets of inner chamber tube bundles surrounding the outside of the central cylinder, and several sets of shell tube bundles surrounding the outside of the central cylinder. The outer chamber tube bundles, inner chamber tube bundles, and shell tube bundles all include several heat exchange tubes. The shell space corresponding to the second region (52) is the shell tube bundle setting area. The upper and lower ends of the shell space corresponding to the second region (52) are provided with connecting pipe components (8) for use as medium inlet and outlet of the shell tube bundle. The two ends of the heat exchange tubes in the outer chamber tube bundle are fixed to the first region (51) of the corresponding tube sheet (1) and connected to the corresponding outer chamber (5); The two ends of the heat exchange tubes in the inner chamber tube bundle are fixed to the inner chamber heat exchange tube setting area of the corresponding tube sheet (1) and connected to the corresponding inner chamber (7); The two ends of the heat exchange tubes in the shell tube bundle are connected to the corresponding connecting pipe assembly (8).
7. The multi-stream heat exchanger as described in claim 6, characterized in that, The tube assembly (8) is provided with a small tube sheet (81), and the two ends of the heat exchange tubes in the shell tube bundle are fixedly connected to the corresponding small tube sheet (81).
8. The multi-stream heat exchanger as described in claim 7, characterized in that, The small tube sheet (81) is a forged tube sheet.