Shell pass medium outlet elbow structure

Abstract

The invention relates to a shell pass medium outlet elbow structure which comprises a first pipe section welded to an equipment barrel, a flange welded to the outer side of the first pipe section, a conical shell section welded to a pipe plate, a corrugated pipe section and a second pipe section, and the corrugated pipe section and the second pipe section are connected between the first pipe section and the conical shell section. Compared with the prior art, the conical shell section is additionally arranged, the conical shell section can achieve the buffering effect when a shell pass medium enters the shell pass medium outlet bent pipe, and therefore the impact force of the shell pass medium on the shell pass medium outlet bent pipe is reduced; compared with the prior art, the corrugated pipe section is additionally arranged, the corrugated pipe section can effectively absorb and compensate the phenomenon of thermal expansion and cold contraction of the shell pass medium outlet elbow pipe caused by temperature difference stress, then weld joints between the shell pass medium outlet elbow pipe and the pipe plate as well as between the shell pass medium outlet elbow pipe and the equipment barrel are protected, and cracking of the weld joints is avoided.

Description

Technical field

[0001] The invention relates to the field of heat exchangers, and in particular to a shell-side medium outlet elbow structure. [Background Technology]

[0002] A heat exchanger, also known as a heat exchanger, is a device that transfers some of the heat from a hot fluid to a cold fluid. Heat exchangers play an important role in chemical, petroleum, power, food, and many other industrial processes. In chemical production, heat exchangers can serve as heaters, coolers, condensers, evaporators, and reboilers.

[0003] See also Figure 1 , Figure 1 A shell-side medium outlet elbow structure in the prior art is disclosed, which includes a first pipe section 2' welded to the equipment barrel 1', a second pipe section 4' welded to the tube sheet 3', and a flange 5' welded to the outside of the first pipe section 2'. The space outside the heat exchange tube below the tube sheet 3' is the shell side, and the space outside the shell-side medium outlet elbow above the tube sheet 3' is the tube side. The defects of the shell-side medium outlet elbow structure in the prior art are: 1. The shell-side medium has a high speed when entering the shell-side medium outlet elbow from the shell side below the tube sheet, so the shell-side medium has a large impact force on the shell-side medium outlet elbow, which is easy to damage the shell-side medium outlet elbow. 2. The shell-side medium passes from the shell side below the tube sheet through the shell-side medium outlet elbow and finally reaches the pipeline outside the equipment. When the shell-side medium passes through the shell-side medium outlet elbow, the shell-side medium flows inside the shell-side medium outlet elbow, while the tube-side medium flows outside the shell-side medium outlet elbow. Therefore, there is a temperature difference between the shell-side medium and the tube-side medium, which will generate temperature difference stress. The temperature difference stress will cause cracks in the welds between the equipment cylinder and the first pipe section and the welds between the tube sheet and the second pipe section.

[0004] Therefore, it is necessary to provide a shell-side medium outlet elbow structure that solves the above technical problems. [Summary of the invention]

[0005] In order to solve the above problems, the object of the present invention is to provide a shell-side medium outlet elbow structure that can extend the service life.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a shell-side medium outlet elbow structure, comprising: a first pipe section welded to the equipment cylinder, 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 connected between the first pipe section and the conical shell section, wherein the conical shell section is wide at the bottom and narrow at the top.

[0007] Preferably, a shell-side medium outlet elbow structure in the present invention is further configured as follows: the first pipe section is a straight pipe section.

[0008] Preferably, a shell-side medium outlet elbow structure in the present invention is further configured as follows: the second pipe section is a elbow section.

[0009] Preferably, a shell-side medium outlet elbow structure in the present invention is further configured as follows: the shell-side medium outlet elbow is made of stainless steel.

[0010] Preferably, a shell-side medium outlet elbow structure in the present invention is further configured as follows: the central axis of the conical shell segment is perpendicular to the central axis of the first pipe segment.

[0011] Preferably, a shell-side medium outlet elbow structure in the present invention is further configured as follows: the conical shell segment is a circular conical shell segment.

[0012] Preferably, a shell-side medium outlet elbow structure in the present invention is further configured as follows: the upper end of the bellows section is welded to one of the free ends of the second pipe section, and the lower end of the bellows 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, and the setting of the conical shell section can enable the shell-side medium to achieve a buffering effect when entering 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 invention also adds a bellows section, and the bellows section can effectively absorb and compensate for the thermal expansion and contraction of the shell-side medium outlet elbow caused by temperature difference stress, thereby protecting the weld between the shell-side medium outlet elbow and the tube plate and the equipment cylinder, avoiding cracking of the weld. Through the above series of improvements, the service life of the shell-side medium outlet elbow is improved.

Brief Description of the Drawings

[0014] Figure 1 It is a structural diagram of the shell-side medium outlet elbow structure in the prior art.

[0015] Figure 2 It is a structural schematic diagram of the shell-side medium outlet elbow structure of the present invention.

[0016] Figure 1 Middle: 1`, equipment cylinder, 2`, first pipe section, 3`, tube sheet, 4`, second pipe section, 5`, flange.

[0017] Figure 2 Middle: 1. Equipment cylinder, 2. First pipe section, 3. Flange, 4. Tube sheet, 5. Conical shell section, 6. Bellows section, 7. Second pipe section. [Specific implementation method]

[0018] The shell-side medium outlet elbow structure of the present invention will be further described in detail below through specific embodiments.

[0019] Ginseng 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, wherein the conical shell section 5 is wide at the bottom and narrow at the top. The first pipe section 2 is a straight pipe section, and the second pipe section 7 is a curved pipe 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 invention adds a conical shell section 5. The setting of the conical shell section 5 can achieve a buffering effect when the shell-side medium 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 invention also adds a bellows section 6. The bellows section 6 can effectively absorb and compensate for the thermal expansion and contraction of the shell-side medium outlet elbow due to temperature difference stress, thereby protecting the weld between the shell-side medium outlet elbow and the tube sheet 4 and the equipment cylinder 1, avoiding cracking of the weld. Through the above series of improvements, the service life of the shell-side medium outlet elbow is improved.

[0021] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application, and are not intended to limit the present invention. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A shell-side medium outlet elbow structure, characterized by: include: A first pipe section welded to the equipment cylinder, a flange welded to the outside of the first pipe section, a cone shell section welded to the tube plate, and a bellows section and a second pipe section connected between the first pipe section and the cone shell section. The cone shell section is wide at the bottom and narrow at the top.

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

3. The shell-side medium outlet elbow structure according to claim 1, characterized in that: The second pipe section is a curved pipe section.

4. The shell-side medium outlet elbow structure according to claim 1, characterized in that: The shell-side medium outlet elbow is made of stainless steel.

5. The shell-side medium outlet elbow structure according to claim 1, characterized in that: The central axis of the cone shell segment is arranged perpendicular to the central axis of the first pipe segment.

6. The shell-side medium outlet elbow structure according to claim 1, characterized in that: The cone shell segment is a conical shell segment.

7. The shell-side medium outlet elbow structure according to claim 1, characterized in that: The upper end of the bellows section is welded to one of the free ends of the second pipe section, and the lower end of the bellows section is welded to the narrow end of the cone shell section.

Images