A connection structure between a partition plate and a tube sheet
Patent Information
- Application Number
- CN202522081187.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-09-28
AI Technical Summary
[0003]请参阅图1，图1揭示了现有技术中的一种换热器结构，该种换热器由于管程介质进口1`与管程介质出口2`设置于管板3`的同一侧，因此需要在管程介质进口1`与管程介质出口2`之间设置分程隔板4`，所述分程隔板4`包括水平段分程隔板40`及竖直段分程隔板41`，所述水平段分程隔板40`与管板3`相焊接，所述竖直段分程隔板41`与设备筒体5`相焊接，我们在日常工作过程中发现，管程介质从管程介质进口1`处进入时温度在420°左右，然后通过换热管6`的换热后到达管程介质出口2`处时温度在320°左右，即分程隔板4`的上下管程介质会存在一个温度差，这个温度差会导致水平段分程隔板40`与管板3`的焊接处的焊缝开裂
[0016]与现有技术相比，本实用新型具有如下有益效果：本实用新型通过对分程隔板与管板的连接结构进行改进，使得分程隔板与管板的连接处设置隔温腔，这样可避免上下温差对焊缝所带来的影响，进而避免了焊缝的开裂，提高了设备的使用寿命。另外由于本实用新型中分程隔板、管板、竖连接板、第一隔温板及第二隔温板均为CrMo钢，CrMo钢焊接后为了去除焊接内应力一般均要进行热处理，而本实用新型中的这种结构为了避免焊接后进行热处理将各焊接部位处均进行了镍基层堆焊处理，这样焊接后就无需再进行热处理，大大节约了工人的工作量，降低了生产成本。
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Figure CN224707360U_ABST
Abstract
Description
[Technical Field]
[0001] This utility model relates to the field of heat exchangers, and in particular to a connection structure between a partition plate and a tube sheet. [Background Technology]
[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid; it is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food, and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, and reboilers, and are widely used.
[0003] Please see Figure 1 , Figure 1 This paper discloses a heat exchanger structure in the prior art. Because the tube-side medium inlet 1' and tube-side medium outlet 2' are located on the same side of the tube sheet 3', a partition plate 4' needs to be installed between the tube-side medium inlet 1' and the tube-side medium outlet 2'. The partition plate 4' includes a horizontal partition plate 40' and a vertical partition plate 41'. The horizontal partition plate 40' is welded to the tube sheet 3', and the vertical partition plate 41' is welded to the equipment shell 5'. During daily operation, we found that the temperature of the tube-side medium entering from the tube-side medium inlet 1' is around 420°C, and after heat exchange through the heat exchange tubes 6', the temperature reaches the tube-side medium outlet 2' at around 320°C. This means there is a temperature difference between the upper and lower tube-side media of the partition plate 4'. This temperature difference can cause the weld at the joint between the horizontal partition plate 40' and the tube sheet 3' to crack. In addition, since both the partition plate 4' and the tube sheet 3' are made of CrMo steel, the residual stress generated after welding needs to be eliminated through heat treatment, which increases the workload of workers and raises the production cost of enterprises.
[0004] Therefore, it is necessary to improve this structure in the existing technology so as to avoid cracking of the weld at the junction of the partition plate and the tube sheet, and to eliminate the heat treatment step. [Utility Model Content]
[0005] To address the aforementioned problems, the purpose of this utility model is to provide a connection structure between the partition plate and the tube sheet that can prevent weld cracking.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a connection structure between a partition plate and a tube sheet, comprising: a partition plate and a tube sheet, wherein the partition plate and the tube sheet are connected by a heat insulation mechanism, the heat insulation mechanism comprising: a vertical connecting plate, a first heat insulation plate and a second heat insulation plate, one side of the vertical connecting plate being welded to the partition plate, the first heat insulation plate and the second heat insulation plate being welded to the other side of the vertical connecting plate and the tube sheet, and a heat insulation cavity being formed between the first heat insulation plate, the second heat insulation plate, the tube sheet and the vertical connecting plate.
[0007] Preferably, the connection structure between the partition plate and the tube sheet in this utility model is further configured as follows: a first nickel base layer is welded to the end where the first insulation plate is welded to the vertical connecting plate; a second nickel base layer is welded to the end where the first insulation plate is welded to the tube sheet; a third nickel base layer is welded to the end where the second insulation plate is welded to the vertical connecting plate; a fourth nickel base layer is welded to the end where the second insulation plate is welded to the tube sheet; a fifth nickel base layer corresponding to the first nickel base layer and a sixth nickel base layer corresponding to the third nickel base layer are welded to one side of the vertical connecting plate; a seventh nickel base layer is welded to the side where the tube sheet is welded to the partition plate; the first nickel base layer and the fifth nickel base layer are welded together using solder; the third nickel base layer and the sixth nickel base layer are welded together using solder; the second nickel base layer and the seventh nickel base layer are welded together using solder; and the fourth nickel base layer and the seventh nickel base layer are welded together using solder.
[0008] Preferably, the connection structure between the partition plate and the tube sheet in this utility model is further configured such that the seventh nickel base layer covers the entire side of the tube sheet.
[0009] Preferably, the connection structure between the partition plate and the tube sheet in this utility model is further configured such that the tube opening of the heat exchange tube is welded to the seventh nickel base layer.
[0010] Preferably, the connection structure between the partition plate and the tube sheet in this utility model is further configured as follows: the first insulation plate and the second insulation plate are arranged in parallel, the second insulation plate is located below the first insulation plate, and the second insulation plate is provided with a drain hole.
[0011] Preferably, the connection structure between the partition plate and the tube sheet in this utility model is further configured such that the first insulation plate and the second insulation plate are respectively arranged perpendicularly to the vertical connecting plate.
[0012] Preferably, the connection structure between the partition plate and the tube sheet in this utility model is further configured such that the thickness of the seventh nickel base layer is 10mm.
[0013] Preferably, the connection structure between the partition plate and the tube sheet in this utility model is further configured such that both ends of the first insulation plate are inclined.
[0014] Preferably, the connection structure between the partition plate and the tube sheet in this utility model is further configured such that both ends of the second insulation plate are inclined.
[0015] Preferably, the connection structure between the partition plate and the tube sheet in this utility model is further configured such that the partition plate, tube sheet, vertical connecting plate, first insulation plate, and second insulation plate are all made of CrMo steel.
[0016] Compared with the prior art, this utility model has the following beneficial effects: By improving the connection structure between the partition plate and the tube sheet, this utility model sets up a heat insulation cavity at the connection between the partition plate and the tube sheet. This avoids the influence of temperature difference between the upper and lower parts on the weld, thereby preventing weld cracking and improving the service life of the equipment. In addition, since the partition plate, tube sheet, vertical connecting plate, first heat insulation plate and second heat insulation plate in this utility model are all made of CrMo steel, CrMo steel generally requires heat treatment after welding to remove welding internal stress. However, the structure in this utility model avoids the need for heat treatment after welding by using nickel-based surfacing at each welded part. This eliminates the need for heat treatment after welding, greatly saving the workload of workers and reducing production costs. [Attached Image Description]
[0017] Figure 1 This is a schematic diagram of the structure of a heat exchanger in the prior art.
[0018] Figure 2 This is a schematic diagram of the connection structure between the partition plate and the tube sheet in this utility model.
[0019] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.
[0020] Figure 4 for Figure 2 A magnified view of a section at point B in the middle.
[0021] Figure 5 for Figure 2 A magnified view of a section at point C.
[0022] Figure 6 for Figure 2 A magnified view of a section at point D.
[0023] Figure 1 In the middle section: 1` Tube-side medium inlet, 2` Tube-side medium outlet, 3` Tube sheet, 4` Baffle plate, 40` Horizontal section baffle plate, 41` Vertical section baffle plate, 5` Equipment shell, 6` Heat exchange tubes.
[0024] Figures 2 to 6Wherein: 1. pass partition; 2. tubesheet; 20. seventh nickel base layer; 3. temperature insulation mechanism; 30. vertical connecting plate; 300. fifth nickel base layer; 301. sixth nickel base layer; 31. first temperature insulation plate; 310. first nickel base layer; 311. second nickel base layer; 32. second temperature insulation plate; 320. drain hole; 321. third nickel base layer; 322. fourth nickel base layer; 33. temperature insulation cavity; 4. heat exchange tube. [Specific Embodiment]
[0025] The following further describes in detail the connection structure of a partition plate and a tubesheet according to the present utility model through specific embodiments.
[0026] Refer to Figures 2 to 6 , a connection structure of a pass partition and a tubesheet comprises: the pass partition 1 and the tubesheet 2, wherein the pass partition 1 and the tubesheet 2 are connected through the temperature insulation mechanism 3, the temperature insulation mechanism 3 comprises a vertical connecting plate 30, a first temperature insulation plate 31 and a second temperature insulation plate 32, both end surfaces of the first temperature insulation plate 31 are arranged as inclined surfaces, both end surfaces of the second temperature insulation plate 32 are also arranged as inclined surfaces, the first temperature insulation plate 31 and the second temperature insulation plate 32 are arranged in parallel, the second temperature insulation plate 32 is located below the first temperature insulation plate 31, the drain hole 320 is arranged on the second temperature insulation plate 32, the first temperature insulation plate 31 and the second temperature insulation plate 32 are respectively arranged perpendicularly to the vertical connecting plate 30. One side of the vertical connecting plate 30 is welded to the pass partition 1, the first temperature insulation plate 31 and the second temperature insulation plate 32 are welded between the other side of the vertical connecting plate 30 and the tubesheet 2, and the temperature insulation cavity 33 is formed among the first temperature insulation plate 31, the second temperature insulation plate 32, the tubesheet 2 and the vertical connecting plate 30.
[0027] The end of the first insulation plate 31 that is welded to the vertical connecting plate 30 is covered with a first nickel base layer 310. The end of the first insulation plate 31 that is welded to the tube sheet 2 is covered with a second nickel base layer 311. The end of the second insulation plate 32 that is welded to the vertical connecting plate 30 is covered with a third nickel base layer 321. The end of the second insulation plate 32 that is welded to the tube sheet 2 is covered with a fourth nickel base layer 322. One side of the vertical connecting plate 30 is covered with a fifth nickel base layer 300 corresponding to the first nickel base layer 310 and a sixth nickel base layer 301 corresponding to the third nickel base layer 321. The side of the tube sheet 2 that is welded to the partition plate 1 is covered with a seventh nickel base layer 20. The seventh nickel base layer 20 covers the entire side of the tube sheet 2. In this embodiment, the thickness of the seventh nickel base layer 20 is 10 mm. The tube opening of the heat exchange tube 4 is welded to the seventh nickel base layer 20. Because the nickel base layer has good toughness, the weld at the tube opening of the heat exchange tube 4 is not prone to cracking. The first nickel base layer 310 and the fifth nickel base layer 300 are welded together using solder; the third nickel base layer 321 and the sixth nickel base layer 301 are welded together using solder; the second nickel base layer 311 and the seventh nickel base layer 20 are welded together using solder; and the fourth nickel base layer 322 and the seventh nickel base layer 20 are welded together using solder. In this embodiment, the partition plate 1, the tube sheet 2, the vertical connecting plate 30, the first insulation plate 31, and the second insulation plate 32 are all made of CrMo steel.
[0028] In summary, this invention improves the connection structure between the partition plate and the tube sheet by incorporating a heat insulation cavity at the connection point. This avoids the impact of temperature differences between the upper and lower parts on the weld, thereby preventing weld cracking and extending the equipment's service life. Furthermore, since the partition plate, tube sheet, vertical connecting plate, first heat insulation plate, and second heat insulation plate in this invention are all made of CrMo steel, which typically requires heat treatment after welding to relieve internal stress, this invention avoids this post-weld heat treatment by using nickel-based surfacing at each weld location. This eliminates the need for post-weld heat treatment, significantly reducing workload and production costs.
[0029] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A connection structure between a partition plate and a tube sheet, comprising: The partition plate and tube sheet are characterized in that: the partition plate and the tube sheet are connected by a thermal insulation mechanism, the thermal insulation mechanism including: a vertical connecting plate, a first thermal insulation plate and a second thermal insulation plate, one side of the vertical connecting plate is welded to the partition plate, the first thermal insulation plate and the second thermal insulation plate are welded to the other side of the vertical connecting plate and the tube sheet, and a thermal insulation cavity is formed between the first thermal insulation plate, the second thermal insulation plate, the tube sheet and the vertical connecting plate.
2. The connection structure between the partition plate and the tube sheet as described in claim 1, characterized in that: A first nickel base layer is welded to the end where the first insulation plate is welded to the vertical connecting plate; a second nickel base layer is welded to the end where the first insulation plate is welded to the tube sheet; a third nickel base layer is welded to the end where the second insulation plate is welded to the vertical connecting plate; a fourth nickel base layer is welded to the end where the second insulation plate is welded to the tube sheet; a fifth nickel base layer corresponding to the first nickel base layer and a sixth nickel base layer corresponding to the third nickel base layer are welded to one side of the vertical connecting plate; a seventh nickel base layer is welded to the side where the tube sheet is welded to the partition plate; the first nickel base layer and the fifth nickel base layer are welded together using solder; the third nickel base layer and the sixth nickel base layer are welded together using solder; the second nickel base layer and the seventh nickel base layer are welded together using solder; and the fourth nickel base layer and the seventh nickel base layer are welded together using solder.
3. The connection structure between the partition plate and the tube sheet as described in claim 1, characterized in that: The seventh nickel base layer covers the entire side of the tube sheet.
4. The connection structure between the partition plate and the tube sheet as described in claim 3, characterized in that: The end of the heat exchange tube is welded to the seventh nickel base layer.
5. The connection structure between the partition plate and the tube sheet as described in claim 1, characterized in that: The first insulation board and the second insulation board are arranged in parallel, with the second insulation board located below the first insulation board, and the second insulation board is provided with a drain hole.
6. The connection structure between the partition plate and the tube sheet as described in claim 5, characterized in that: The first insulation plate and the second insulation plate are respectively set perpendicular to the vertical connecting plate.
7. The connection structure between the partition plate and the tube sheet as described in claim 1, characterized in that: The thickness of the seventh nickel base layer is 10 mm.
8. The connection structure between the partition plate and the tube sheet as described in claim 1, characterized in that: Both ends of the first insulation board are sloped.
9. The connection structure between the partition plate and the tube sheet as described in claim 1, characterized in that: Both ends of the second insulation board are sloped.
10. The connection structure between the partition plate and the tube sheet as described in claim 1, characterized in that: The partition plate, tube sheet, vertical connecting plate, first insulation plate and second insulation plate are all made of CrMo steel.