Pressure vessel with high-pressure-resistant flexible tube plate

Abstract

The utility model discloses a pressure vessel with a high-pressure-resistant flexible tube plate, which relates to the technical field of pressure vessels and comprises a tube pass cylinder, a shell pass cylinder, a tube plate and an annular integral forging consisting of a connecting section, a middle section, a protruding section and a flexible transition section. The transition problem of the thickness difference between the tube plate and the shell pass barrel is solved, and the welding problem of the tube pass shell end structure and the tube plate transition section is also solved; it is guaranteed that the thickness of the barrel meets the equipment pressure requirement; the plate part of the tube plate is still thinner, so that the cost is saved; the transition problem of the thickness difference between the tube plate and the shell pass barrel is also solved, trimming is not needed any more, the welding problem of the end of the tube pass barrel and the tube plate transition section is solved, and machining and manufacturing are convenient; the pipe distribution space of the heat exchange pipes is guaranteed, the problems that the pipe distribution area is large and the space is limited are solved, and the safety and the reliability of the pressure container are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure vessels, in particular to a pressure vessel with a high-pressure resistant flexible tube plate. Background Art

[0002] High-pressure pressure vessels, especially those above 5.0 MPa, have thicker shell-side cylinders and a larger thickness difference with the tube-side cylinders. Figure 1 As shown, it is difficult to fully penetrate the weld between the end of the tube-side cylinder and the shell-side cylinder.

[0003] In addition, the current industry standards do not specify the chamfered structure of the flexible transition section and the flexible transition tube sheet when the shell and tube pressure vessel is fully piped. The transition section of the flexible tube sheet and the tube sheet in the pipe area are usually an integrated structure. For equipment with higher shell side pressure, the shell side cylinder thickness is much greater than the tube sheet thickness. For this situation, GB / T 151 Appendix M provides the following: Figure 2 The chamfered edge structure shown.

[0004] Given that the design requirement of Appendix M of GB / T 151 states that the structure with a slope of 1:3 needs to occupy the piping space for heat exchange tubes, when there are a large number of heat exchange tubes and a large piping area, the slope structure occupies part of the piping space, resulting in a problem of no space for arranging the outer ring heat exchange tubes.

[0005] In order to ensure the number of tubes and heat transfer efficiency, the transition tube sheet is not chamfered. It is necessary to design a slope structure at the connection between the shell side cylinder and the transition tube sheet. Specifically, the shell side cylinder is chamfered, as shown in the attached figure. Figure 1 As shown, chamfering the shell-side cylinder will lead to two problems: 1. The chamfered part of the cylinder cannot meet the thickness calculated according to the cylinder internal pressure calculation formula (the cylinder thickness is thinned); 2. The welding of the tube-side shell end structure and the flexible tube sheet transition section, that is, the end structure is thick, cannot achieve full penetration, and the welding quality cannot be guaranteed. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a pressure vessel with a high-pressure resistant flexible tube sheet, comprising a tube-side cylinder, a shell-side cylinder and a tube sheet, wherein the shell-side cylinder is symmetrically provided with annular integral forgings at both ends along its length direction, and the annular integral forging comprises a connecting section welded to the shell-side cylinder, a protruding section welded to the tube-side cylinder and a flexible transition section welded to the circumferential side wall of the tube sheet; the thickness of the connecting section is equal to the wall thickness of the shell-side cylinder; the flexible transition section is chamfered, and the thickness of the weld with the tube sheet is equal to the thickness of the tube sheet, and the thickness of the connection with the connecting section is equal to the thickness of the connecting section; the thickness of the weld with the protruding section is equal to the wall thickness of the tube-side cylinder

[0007] The technical solution further defined in the present utility model is:

[0008] Furthermore, the connecting section has a middle section protruding outward, the middle section is connected to the side of the protruding section away from the tube cylinder, and the connection between the middle section and the connecting section is chamfered.

[0009] As described above, in a pressure vessel with a high-pressure resistant flexible tube sheet, the middle section is arranged to be perpendicular to both the connecting section and the protruding section.

[0010] As described above, in a pressure vessel with a high-pressure resistant flexible tube sheet, an outer side of the protruding section near one end of the middle section is provided with an inclined surface, and the outermost side of the inclined surface is set flush with the outermost side of the middle section.

[0011] In the pressure vessel with the high-pressure resistant flexible tube sheet as described above, the slope of the inclined surface is set to 1:3.

[0012] As described above, in a pressure vessel with a high-pressure resistant flexible tube sheet, a rounded corner is provided on the inner side of the connection between the protruding section and the middle section.

[0013] As described above, in a pressure vessel with a high-pressure resistant flexible tube sheet, the end surface of the protruding section facing away from the middle section is flush with the end surface of the tube sheet on the side close to the tube side cylinder.

[0014] As described above, in a pressure vessel with a high-pressure resistant flexible tube sheet, the outer end of the middle section on the side away from the protruding section is rounded.

[0015] The beneficial effects of the utility model are:

[0016] (1) In this utility model, the annular integral forging includes the tube sheet transition section and the tube shell end, thereby ensuring that the thickness of the cylinder meets the pressure requirements of the equipment; the plate part of the tube sheet still adopts a relatively thin thickness, saving costs;

[0017] (2) The utility model solves the transition problem of the thickness difference between the tube sheet and the shell cylinder, and no longer requires edge cutting. At the same time, it solves the welding problem of the end of the tube cylinder and the transition section of the tube sheet, which is convenient for processing and manufacturing;

[0018] (3) The utility model ensures the space for arranging heat exchange tubes, solves the problem of large pipe arrangement area and limited space, and thus ensures the safety and reliability of the pressure vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the welding between the end of the tube-side cylinder and the shell-side cylinder in the background technology of the present utility model;

[0020] Figure 2 A schematic diagram of a chamfered edge structure in the background technology of the present utility model;

[0021] Figure 3It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 4 for Figure 3 A magnified schematic diagram of point A in the middle;

[0023] Figure 5 It is a structural schematic diagram of the annular integral forging in the present utility model.

[0024] Among them: 1. tube-side cylinder; 2. shell-side cylinder; 3. tube sheet; 4. annular integral forging; 41. connecting section; 42. protruding section; 421. inclined surface; 43. flexible transition section; 44. middle section. DETAILED DESCRIPTION

[0025] This embodiment provides a pressure vessel with a high-pressure resistant flexible tube sheet, the structure of which is as follows: Figures 3 to 5 As shown, it includes a tube-side cylinder 1, a shell-side cylinder 2 and a tube sheet 3. The shell-side cylinder 2 is symmetrically provided with annular forgings 4 at both ends along its length direction. The annular forging 4 includes a connecting section 41 welded to the shell-side cylinder 2, a protruding section 42 welded to the tube-side cylinder 1 and a flexible transition section 43 welded to the circumferential side wall of the tube sheet 3. The connecting section 41 protrudes outward with an intermediate section 44, and the intermediate section 44 is connected to the side of the protruding section 42 facing away from the tube-side cylinder 1.

[0026] The thickness of the connecting section 41 is equal to the wall thickness of the shell-side cylinder 2; the flexible transition section 43 is rounded, and the thickness of the welding point with the tube sheet 3 is equal to the thickness of the tube sheet 3, and the thickness of the connection point with the connecting section 41 is equal to the thickness of the connecting section 41.

[0027] The thickness of the welding portion between the protruding section 42 and the tube-side cylinder 1 is equal to the wall thickness of the tube-side cylinder 1. An inclined surface 421 is provided on the outer side of the protruding section 42 on the end close to the middle section 44. The outermost side of the inclined surface 421 is set to be flush with the outermost side of the middle section 44. The slope of the inclined surface 421 is set to 1:3. The inner side of the connection between the protruding section 42 and the middle section 44 is chamfered. The end face of the protruding section 42 facing away from the middle section 44 is flush with the end face of the tube sheet 3 on the side close to the tube-side cylinder 1.

[0028] The middle section 44 is arranged to be perpendicular to both the connecting section 41 and the protruding section 42 . The connection between the middle section 44 and the connecting section 41 is rounded, and the outer end of the middle section 44 facing away from the protruding section 42 is rounded.

[0029] In this embodiment, the tube sheet 3 is a thin tube sheet made of sheet material, and the connecting section 41, the intermediate section 44, the protruding section 42 and the flexible transition section 43 are connected as an integral annular forging 4, wherein the integral body formed by the intermediate section 44 and the protruding section 42 is the tube-side cylinder end described in the background technology. The annular forging 4 connects the tube sheet 3, the shell-side cylinder 2 and the tube-side cylinder 1. The tube-side shell end and the flexible tube sheet transition section are no longer welded, but are replaced by an integral forging, which solves the transition problem of the thickness difference between the tube sheet 3 and the shell-side cylinder 2, and solves the welding problem of the tube-side shell end structure and the tube sheet transition section.

[0030] The annular integral forging 4 includes the tube sheet transition section and the tube side shell end, thereby ensuring that the thickness of the cylinder meets the pressure requirements of the equipment; the plate part of the tube sheet 3 still adopts a relatively thin thickness, saving costs; at the same time, it also solves the transition problem of the thickness difference between the tube sheet 3 and the shell side cylinder 2, and no longer requires edge cutting, solves the welding problem between the tube side cylinder end and the tube sheet transition section, and facilitates processing and manufacturing; ensures the pipe layout space for the heat exchange tubes, solves the problem of large pipe layout area and limited space, thereby ensuring the safety and reliability of the pressure vessel.

[0031] In addition to the above embodiments, the present invention may also have other implementation methods; any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A pressure vessel with a high-pressure resistant flexible tube sheet, comprising a tube-side cylinder (1), a shell-side cylinder (2) and a tube sheet (3), characterized in that: The shell-side cylinder (2) is symmetrically provided with annular integral forgings (4) at both ends along its length direction. The annular integral forgings (4) include a connecting section (41) welded to the shell-side cylinder (2), a protruding section (42) welded to the tube-side cylinder (1), and a flexible transition section (43) welded to the circumferential side wall of the tube sheet (3); the thickness of the connecting section (41) is equal to the wall thickness of the shell-side cylinder (2); the flexible transition section (43) is rounded, and the thickness of the section welded to the tube sheet (3) is equal to the thickness of the tube sheet (3), and the thickness of the section connected to the connecting section (41) is equal to the thickness of the connecting section (41); the thickness of the section welded to the tube-side cylinder (1) is equal to the wall thickness of the tube-side cylinder (1).

2. The pressure vessel with a high-pressure resistant flexible tube sheet according to claim 1, characterized in that: The connecting section (41) has an intermediate section (44) protruding outwards. The intermediate section (44) is connected to the side of the protruding section (42) facing away from the tube-side cylinder (1). The connection between the intermediate section (44) and the connecting section (41) is rounded.

3. The pressure vessel with a high-pressure resistant flexible tube sheet according to claim 2, characterized in that: The middle section (44) is arranged to be perpendicular to both the connecting section (41) and the protruding section (42).

4. The pressure vessel with a high-pressure resistant flexible tube sheet according to claim 2, characterized in that: An inclined surface (421) is provided on the outer side of one end of the protruding section (42) close to the middle section (44), and the outermost side of the inclined surface (421) is arranged to be flush with the outermost side of the middle section (44).

5. The pressure vessel with a high-pressure resistant flexible tube sheet according to claim 4, characterized in that: The slope of the inclined surface (421) is set to 1:

3.

6. The pressure vessel with a high-pressure resistant flexible tube sheet according to claim 2, characterized in that: The inner side of the connection between the protruding section (42) and the middle section (44) is rounded.

7. The pressure vessel with a high-pressure resistant flexible tube sheet according to claim 2, characterized in that: The end surface of the protruding section (42) facing away from the middle section (44) is flush with the end surface of the tube sheet (3) on the side close to the tube side cylinder (1).

8. The pressure vessel with a high-pressure resistant flexible tube sheet according to claim 2, characterized in that: The outer end of the middle section (44) facing away from the protruding section (42) is rounded.

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