A shell-side medium outlet bend structure

Abstract

This utility model relates to a shell-side medium outlet bend structure, comprising: a first pipe section welded to the equipment shell, a flange welded to the outside of the first pipe section, a conical shell section welded to the tube sheet, and a corrugated pipe section and a second pipe section connecting the first pipe section and the conical shell section. The conical shell section is wider at the bottom and narrower at the top. Compared with the prior art, this utility model adds a conical shell section, which can buffer the shell-side medium when it enters the shell-side medium outlet bend, thereby reducing the impact force of the shell-side medium on the shell-side medium outlet bend. Compared with the prior art, this utility model also adds a corrugated pipe section, which can effectively absorb and compensate for the thermal expansion and contraction caused by temperature difference stress in the shell-side medium outlet bend, thereby protecting the weld between the shell-side medium outlet bend and the tube sheet and equipment shell, and avoiding weld cracking.

Description

[Technical Field]

[0001] This utility model relates to the field of heat exchangers, and in particular to a shell-side medium outlet bend structure. [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 production processes. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, and reboilers, etc.

[0003] Please see Figure 1 , Figure 1 This paper discloses a shell-side medium outlet bend structure in the prior art, which includes a first tube section 2' welded to the equipment shell 1', a second tube section 4' welded to the tube sheet 3', and a flange 5' welded to the outside of the first tube section 2'. The space outside the heat exchange tubes below the tube sheet 3' is the shell side, and the space outside the shell-side medium outlet bend above the tube sheet 3' is the tube side. The defects of the shell-side medium outlet bend structure in the prior art are: 1. When the shell-side medium enters the shell-side medium outlet bend from the shell side below the tube sheet, the velocity is relatively fast. Therefore, the impact force of the shell-side medium on the shell-side medium outlet bend is relatively large, which can easily damage the shell-side medium outlet bend. 2. The shell-side medium travels from the shell side below the tube sheet through the shell-side medium outlet bend and finally into the pipeline outside the equipment. When the shell-side medium travels through the shell-side medium outlet bend, the shell-side medium flows inside the bend while the tube-side medium flows outside the bend. There is a temperature difference between the shell-side medium and the tube-side medium, which will generate thermal stress. This thermal stress will cause cracks at the weld between the equipment shell and the first tube section, and at the weld between the tube sheet and the second tube section.

[0004] Therefore, it is necessary to provide a shell-side medium outlet bend structure to solve the above-mentioned technical problems. [Utility Model Content]

[0005] To address the aforementioned problems, the purpose of this invention is to provide a shell-side medium outlet bend structure that can extend service life.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a shell-side medium outlet bend structure, comprising: a first pipe section welded to the equipment shell, a flange welded to the outside of the first pipe section, a conical shell section welded to the tube sheet, and a corrugated pipe section and a second pipe section connecting the first pipe section and the conical shell section, wherein the conical shell section is wider at the bottom and narrower at the top.

[0007] Preferably, the shell-side medium outlet bend structure of this utility model is further configured such that the first pipe section is a straight pipe section.

[0008] Preferably, one shell-side medium outlet bend structure in this utility model is further configured such that the second pipe section is a bend section.

[0009] Preferably, one shell-side medium outlet bend structure of the present invention is further configured such that the shell-side medium outlet bend is made of stainless steel.

[0010] Preferably, the shell-side medium outlet bend structure of this utility model is further configured such that the central axis of the conical shell section is perpendicular to the central axis of the first pipe section.

[0011] Preferably, the shell-side medium outlet bend structure of this utility model is further configured such that the conical shell section is a conical shell section.

[0012] Preferably, the shell-side medium outlet bend structure of this utility model is further configured such that: the upper end of the corrugated pipe section is welded to one of the free ends of the second pipe section, and the lower end of the corrugated pipe section is welded to the narrow end of the conical shell section.

[0013] Compared with the prior art, the present invention has the following beneficial effects: Compared with the prior art, the present invention adds a conical shell section, which can buffer the shell-side medium when it enters the shell-side medium outlet bend, thereby reducing the impact force of the shell-side medium on the shell-side medium outlet bend; Compared with the prior art, the present invention also adds a corrugated pipe section, which can effectively absorb and compensate for the thermal expansion and contraction phenomenon caused by temperature difference stress in the shell-side medium outlet bend, thereby protecting the weld between the shell-side medium outlet bend and the tube sheet and equipment shell, and avoiding weld cracking. Through the above series of improvements, the service life of the shell-side medium outlet bend is improved. [Attached Image Description]

[0014] Figure 1 This is a schematic diagram of the shell-side medium outlet bend structure in the prior art.

[0015] Figure 2 This is a schematic diagram of the shell-side medium outlet bend structure of this utility model.

[0016] Figure 1 In the middle: 1` Equipment shell, 2` First pipe section, 3` Tube sheet, 4` Second pipe section, 5` Flange.

[0017] Figure 2 In the middle: 1. Equipment shell, 2. First pipe section, 3. Flange, 4. Tube sheet, 5. Conical shell section, 6. Corrugated pipe section, 7. Second pipe section.

Detailed Implementation Methods

[0018] The following provides a further detailed description of a shell-side medium outlet elbow structure according to the present utility model through specific embodiments.

[0019] Refer Figure 2 As shown, a shell-side medium outlet elbow structure includes: a first pipe section 2 welded to the equipment cylinder 1, a flange 3 welded to the outside of the first pipe section 2, a conical shell section 5 welded to the tube sheet 4, and a bellows section 6 and a second pipe section 7 connected between the first pipe section 2 and the conical shell section 5. The conical shell section 5 is arranged with a wider bottom and a narrower top. The first pipe section 2 is a straight pipe section, and the second pipe section 7 is an elbow section. In this embodiment, the shell-side medium outlet elbow is made of stainless steel material, so it has good corrosion resistance. The central axis of the conical shell section 5 is perpendicular to the central axis of the first pipe section 2. In this embodiment, the conical shell section 5 is a conical shell section. The upper end of the bellows section 6 is welded to one of the free ends of the second pipe section 7, and the lower end of the bellows section 6 is welded to the narrow end of the conical shell section 5.

[0020] In summary, compared with the prior art, the present utility model adds a conical shell section 5. The setting of the conical shell section 5 can buffer the shell-side medium when it enters the shell-side medium outlet elbow, thereby reducing the impact force of the shell-side medium on the shell-side medium outlet elbow; compared with the prior art, the present utility model also adds a bellows section 6. The bellows section 6 can effectively absorb and compensate for the thermal expansion and contraction phenomenon caused by temperature difference stress of the shell-side medium outlet elbow, thereby protecting the welds between the shell-side medium outlet elbow and the tube sheet 4 and the equipment cylinder 1 and avoiding the cracking of the welds. Through the above series of improvements, the service life of the shell-side medium outlet elbow is improved.

[0021] The above embodiments only illustratively explain the principle and efficacy of the present utility model and some applied embodiments, rather than restricting the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the creative concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A shell side medium outlet elbow structure, characterized by: include: The first pipe section is welded to the equipment shell, the flange is welded to the outside of the first pipe section, the conical shell section is welded to the tube sheet, and the corrugated pipe section and the second pipe section are connected between the first pipe section and the conical shell section. The conical shell section is wider at the bottom and narrower at the top.

2. A shell-side medium outlet elbow structure as claimed in claim 1, characterized in that: The first pipe section is a straight pipe section.

3. A shell-side medium outlet elbow structure as claimed in claim 1, characterized in that: The second pipe section is a bend.

4. A shell-side medium outlet elbow structure as claimed in claim 1, characterized in that: The shell-side medium outlet bend is made of stainless steel.

5. A shell-side medium outlet elbow structure as claimed in claim 1, characterized in that: The central axis of the conical shell section is perpendicular to the central axis of the first pipe section.

6. A shell-side medium outlet elbow structure as claimed in claim 1, characterized in that: The conical shell section is a cylindrical shell section.

7. A shell-side medium outlet bend structure as claimed in claim 1, characterized in that: The upper end of the corrugated pipe section is welded to one of the free ends of the second pipe section, and the lower end of the corrugated pipe section is welded to the narrow end of the conical shell section.

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