CN204757795U - Sealing structure of shell-and-tube heat exchanger - Google Patents

Abstract

The utility model provides a shell and tube heat exchanger's seal structure, shell and tube heat exchanger include the tube sheet, with the flange that the tube sheet is connected with the sealed pad of setting between tube sheet and flange, be provided with on tube sheet and/or the flange with the recess of the sealed looks adaptation that fills up, sealed pad setting is in the recess. Use the technical scheme of the utility model, with sealed the setting of filling up in the recess rather than the looks adaptation, can play the effect that the sealed pad of prevention takes place distortion, aversion and deformation at the in-process with tube sheet and flange fastening together to prevent sealed pad inefficacy effectively to appear.

Description

Sealing structure of shell and tube heat exchanger

technical field

The utility model relates to the field of shell and tube heat exchangers, in particular to a sealing structure of the shell and tube heat exchanger.

Background technique

As shown in Figures 1 and 2, in the prior art, the tube plate surface of the shell-and-tube heat exchanger is usually processed by the overall flying surface process of the gantry machining center to ensure that the flatness of the entire surface reaches 0.25 and the roughness reaches 6.3. Then the tube sheet 1' is connected with the flange and the gasket through multiple bolts 2' to meet the sealing requirements, but the structure of the tube sheet 1' has the following disadvantages:

1. The surface sealing surface of the tube sheet 1' is a flat sealing method. During the bolt fixing process, the gasket 2' deforms unevenly in the lateral direction, and will be twisted, displaced and deformed, which may lead to potential failure of the seal.

2. The structure of the diaphragm sealing part of the gasket, this structure has the problem of possible displacement and leakage during the process of pressure.

3. The entire surface of the tube plate 1' is machined with flying surface, the production efficiency is low, and raw materials are wasted at the same time.

Utility model content

The main purpose of the utility model is to provide a sealing structure of a shell-and-tube heat exchanger to solve the problem of sealing failure in the prior art.

In order to achieve the above purpose, the utility model provides a sealing structure of a shell-and-tube heat exchanger. The shell-and-tube heat exchanger includes a tube sheet, a flange connected to the tube sheet, and a flange arranged between the tube sheet and the flange. The gasket, the tube sheet and/or the flange are provided with a groove matching the gasket, and the gasket is arranged in the groove.

Further, the gasket is fixedly connected with the tube sheet or the flange.

Further, the sealing gasket is bonded to the bottom of the groove.

Further, the bottom of the groove is provided with a plurality of first bolt holes for connecting the gasket, and the gasket is provided with a plurality of second bolt holes corresponding to the plurality of first bolt holes.

Further, the gasket includes a flange sealing part, the flange sealing part is arranged between the end surface of the flange and the tube sheet, the flange sealing part is annular, and at least part of the second bolt holes in the plurality of second bolt holes are arranged in the on the flange seal.

Further, at least part of the second bolt holes are evenly arranged along the circumferential direction of the flange sealing part.

Further, the groove is arranged on the tube sheet.

Further, the flange is provided with a split-range partition, and the gasket includes: a flange sealing part arranged between the end face of the flange and the tube sheet; a split-pass partition sealing part arranged between the split-pass partition and the tube sheet between.

Further, the sealing part of the flange and the sealing part of the partition plate are integrally arranged.

Further, the thickness of the gasket is greater than the depth of the groove.

Applying the technical solution of the utility model, the gasket is arranged in the matching groove, which can prevent the gasket from twisting, shifting and deforming during the process of fastening the tube sheet and the flange together. role, thereby effectively preventing gasket failure.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 shows the structural representation of the prior art tube sheet;

Fig. 2 shows the schematic cross-sectional structural diagram at A-A place of Fig. 1;

Fig. 3 shows a schematic structural view of the tube sheet according to an embodiment of the sealing structure of the shell-and-tube heat exchanger of the present invention;

Fig. 4 shows the schematic cross-sectional structural view at the B-B place of Fig. 1;

Fig. 5 shows a schematic structural view of the gasket according to an embodiment of the sealing structure of the shell-and-tube heat exchanger of the present invention;

Fig. 6 shows a schematic structural view of the flange of an embodiment of the sealing structure of the shell-and-tube heat exchanger according to the present invention;

Fig. 7 shows a partial structural schematic diagram of the connection between the tube sheet and the flange according to the present invention.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

1. Tube sheet; 2. Flange; 3. Gasket; 31. Flange sealing part; 32. Split-pass partition sealing part; 4. Groove; 5. First bolt hole; 6. Split-pass partition; 7. Through hole; 8. Heat exchange medium inlet; 9. Heat exchange medium outlet; 10. First cavity; 11. Second cavity; 12. Heat exchange medium inlet pipe; 13. Heat exchange medium outlet pipe; 14 , The second bolt hole.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Figures 3 to 7, the shell and tube heat exchanger includes a tube sheet 1, a flange 2 connected to the tube sheet 1 and a gasket 3 arranged between the tube sheet 1 and the flange 2, the tube sheet 1 and/or Or the flange 2 is provided with a groove 4 adapted to the gasket 3 , and the gasket 3 is arranged in the groove 4 .

The shell and tube heat exchanger also includes a shell and heat exchange tubes arranged in the shell. The tube plate 1 is set at one end of the shell, and the tube plate 1 is formed with a plurality of heat exchange medium inlets 8 and a plurality of heat exchange medium outlets. 9. Multiple heat exchange medium inlets 8 are used to transport heat exchange medium into the heat exchange tubes, and multiple heat exchange medium outlets 9 are used to output the heat exchange medium in the heat exchange tubes.

As shown in Figure 6, the cavity of the flange 2 is provided with a divider partition 6, the divider 6 divides the cavity of the flange 2 into a first cavity 10 and a second cavity 11, multiple heat exchange The medium inlets 8 are all connected to the first cavity 10 , and the plurality of heat exchange medium outlets 9 are all connected to the second cavity 11 . The flange 2 is also connected with a heat exchange medium inlet pipe 12 and a heat exchange medium outlet pipe 13, the heat exchange medium inlet pipe 12 communicates with the first chamber 10, and the heat exchange medium outlet pipe 13 communicates with the second chamber 11 .

The tube sheet 1 is provided with a plurality of through holes 7 , and the tube sheet 1 and the flange 2 are connected by a plurality of connecting bolts corresponding to the plurality of through holes 7 .

In this embodiment, the tube sheet 1 and/or the flange 2 are provided with a groove 4 that is compatible with the gasket 3, and the gasket 3 is set in the groove 4 that is adapted to it, and the tube sheet can be installed 1 and the flange 2 are fastened together to prevent the sealing gasket 3 from twisting, shifting and deforming, thereby effectively preventing the sealing gasket 3 from failing.

Further, the machining of the flying surface on the tube sheet 1 is avoided, only the sealing surface is processed, the cutting amount during processing is small, the production efficiency is high, the thickness of the tube sheet is reduced, the cost is reduced, and the tool life is long.

Preferably, the gasket 3 is fixedly connected with the tube sheet 1 or the flange 2 . In the process of fastening the tube sheet 1 and the flange 2, the sealing gasket 3 is further prevented from twisting, shifting and deforming, thereby preventing the sealing gasket 3 from failing.

Preferably, the gasket 3 is bonded to the bottom of the groove 4 .

Also preferably, the bottom of the groove 4 is provided with a plurality of first bolt holes 5 for connecting the gasket 3, and the gasket 3 is provided with a plurality of second bolt holes 5 corresponding to the plurality of first bolt holes. 14 bolt holes. The gasket 3 is fixed on the flange 2 or the tube sheet 1 by bolts passing through the first bolt hole 5 and the corresponding second bolt hole 14 .

Preferably, the gasket 3 includes a flange sealing portion 31, which is arranged between the end face of the flange 2 and the tube plate 1, the flange sealing portion 31 is annular, and at least one of the plurality of second bolt holes 14 Part of the second bolt hole 14 is disposed on the flange sealing portion 31 . The flange sealing portion 31 is disposed between the end surface of the flange 2 and the tube plate 1 , so as to effectively prevent the heat exchange medium from leaking out of the cavity of the flange 2 .

Preferably, the flange sealing portion 31 is annular, and at least part of the second bolt holes 14 are evenly arranged along the circumference of the flange sealing portion 31 . A plurality of second bolt holes 14 are evenly arranged along the circumference of the gasket 3 , which is beneficial to further prevent the gasket 3 from twisting, shifting and deforming.

Of course, it may also be preferred that third bolt holes corresponding to the plurality of second bolt holes 14 are provided on the flange 2, and the gasket 3, the tube sheet 1 and the flange 2 are fastened together by bolts.

In this embodiment, the groove 4 is arranged on the tube sheet 1 .

Preferably, the flange 2 is provided with a division partition 6 , and the gasket 3 includes a flange sealing portion 31 and a division partition sealing portion 32 . The flange seal 31 is arranged between the end face of the flange 2 and the tube plate 1 . The split-pass partition seal part 32 is provided between the split-pass partition 6 and the tube sheet 1 . FIG. 5 shows a schematic structural diagram of the gasket 3 .

The flange sealing part 31 is ring-shaped, and the split-pass diaphragm sealing part 32 is strip-shaped. Both ends of the split-pass diaphragm sealing part 32 are connected with the inner circumference of the flange sealing part 31, and the flange sealing part 31 into two semicircles. A plurality of heat exchange medium inlets 8 and a plurality of heat exchange medium outlets 9 are respectively located in a semicircle, and the split-pass partition 6 is in contact with the sealing part of the split-pass partition, so that the heat transfer medium inlet 8 and the heat transfer medium outlet 9 phase separation. The sealing part 32 of the split-pass partition is arranged in the groove 4 so as to effectively prevent the twisting, shifting and deformation of the sealing part 32 of the split-pass partition, and prevent the heat exchange medium from entering the heat exchange medium inlet 8 and passing through the heat exchange medium outlet 9 The outgoing heat exchange medium is mixed.

Preferably, the flange sealing portion 31 and the partition plate sealing portion 32 are integrally provided. It is beneficial to simplify the structure, and also increases the integrity of the gasket 3, thereby helping to prevent the gasket from twisting, shifting and deforming.

Preferably, the thickness of the gasket 3 is greater than the depth of the groove 4 . The depth of the groove 4 is 2 mm, the width of the part of the groove 4 that matches the flange sealing part 31 is 60 mm to 90 mm, and the width of the part of the groove 4 that matches the sealing part 32 of the partition plate is 14 mm.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. the hermetically-sealed construction of a shell and tube exchanger, the sealing gasket (3) that shell and tube exchanger comprises tube sheet (1), the flange (2) be connected with described tube sheet (1) and is arranged between described tube sheet (1) and described flange (2), it is characterized in that, described tube sheet (1) and/or described flange (2) are provided with the groove (4) suitable with described sealing gasket (3), and described sealing gasket (3) is arranged in described groove (4).

2. hermetically-sealed construction according to claim 1, is characterized in that, described sealing gasket (3) is fixedly connected with described tube sheet (1) or described flange (2).

3. hermetically-sealed construction according to claim 2, is characterized in that, described sealing gasket (3) is bonding with the bottom of described groove (4).

4. hermetically-sealed construction according to claim 2, it is characterized in that, the bottom of described groove (4) is provided with multiple first bolts hole (5) for connecting described sealing gasket (3), described sealing gasket (3) is provided with multiple second bolts hole (14) corresponding with described multiple first bolt hole (5).

5. hermetically-sealed construction according to claim 4, it is characterized in that, described sealing gasket (3) comprises flange seal portion (31), described flange seal portion (31) is arranged between the end face of described flange (2) and described tube sheet (1), ringwise, described at least partly the second bolt hole (14) in described multiple second bolt hole (14) is arranged on described flange seal portion (31) described flange seal portion (31).

6. hermetically-sealed construction according to claim 5, is characterized in that, described at least part of second bolt hole (14) is evenly arranged along the circumference of described flange seal portion (31).

7. hermetically-sealed construction according to claim 1, is characterized in that, described groove (4) is arranged on described tube sheet (1).

8. hermetically-sealed construction according to claim 7, is characterized in that, described flange (2) is provided with pass partition (6), and described sealing gasket (3) comprising:

Flange seal portion (31), is arranged between the end face of described flange (2) and described tube sheet (1);

Pass partition sealing (32), is arranged between described pass partition (6) and described tube sheet (1).

9. hermetically-sealed construction according to claim 8, is characterized in that, described flange seal portion (31) and described pass partition sealing (32) are wholely set.

10. hermetically-sealed construction according to claim 1, is characterized in that, the thickness of described sealing gasket (3) is greater than the degree of depth of described groove (4).