CN210036404U - Shell side combined sealing structure of hairpin type heat exchanger - Google Patents
Shell side combined sealing structure of hairpin type heat exchanger Download PDFInfo
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- CN210036404U CN210036404U CN201920619078.XU CN201920619078U CN210036404U CN 210036404 U CN210036404 U CN 210036404U CN 201920619078 U CN201920619078 U CN 201920619078U CN 210036404 U CN210036404 U CN 210036404U
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Abstract
The utility model discloses a shell side combined seal structure of hairpin formula heat exchanger solves the not good, the relatively poor problem of adaptability of sealed effect that current shell side seal structure of hairpin formula heat exchanger exists. The technical scheme includes that the sealing device comprises a shell pass fixing flange, a shell pass companion flange and a tube plate extension part, wherein the shell pass fixing flange is in sealing connection with the shell pass companion flange and the shell pass companion flange is in sealing connection with the tube plate extension part through a sealing assembly. The utility model discloses sealed effectual, the pretightning force is adjustable, be applicable to high pressure high temperature operating mode.
Description
Technical Field
The utility model relates to a sealing structure.
Background
HAIRPIN heat exchangers (HAIRPIN) are a special type of heat exchange heat. The heat exchanger structurally has the characteristics of pipe shell path medium countercurrent, low resistance drop, high temperature difference and high heat exchange efficiency. Is widely applied to petrochemical engineering.
Referring to fig. 1, in a conventional HAIRPIN (HAIRPIN) shell side sealing structure, a wedge-shaped metal sealing ring is arranged on the top surface of an extension part of a tube plate, a sealing surface of a shell side fixing flange is processed into an inclined surface, and after the sealing surface is pressed on the surface of the metal sealing ring, axial and radial pressing forces are generated at the same time, so that the wedge-shaped metal sealing ring is tightly attached to the outer surface of the extension part of the tube plate, and thus shell side sealing is ensured. The structure adopts a group of bolt force, the inclined plane of the sealing ring is required to be simultaneously clung to the sealing inclined plane of the fixed flange and the inner side of the sealing ring and the outer surface of the extension part of the tube plate to play a sealing role, but because the same bolt force generates different pressing forces on the inclined plane and the inner side plane of the wedge-shaped metal sealing gasket, and meanwhile, because the wedge-shaped sealing ring is made of metal, the pressing force required for achieving the sealing effect is larger, and therefore, the sealing effect is often influenced under the condition of higher shell pass pressure.
Referring to fig. 2, in chinese patent No. 201420549310.4, the sealing element is an O-ring, the sealing ring is installed in an annular groove at the front end of the extension part of the tube plate, and the sealing performance of the shell side is ensured by elastic deformation of the O-ring after installation. Due to the characteristics of the special shape of the rubber material and the sealing of the O-shaped ring, the sealing structure is suitable for the working conditions that the shell side pressure of the hairpin type heat exchanger is low and the temperature does not exceed 250 ℃.
Disclosure of Invention
The utility model aims at solving the technical problem, provide a shell side combined seal structure of hairpin formula heat exchanger that sealed effectual, the pretightning force is adjustable, be applicable to high pressure high temperature operating mode.
The technical scheme includes that the sealing device comprises a shell pass fixing flange, a shell pass companion flange and a tube plate extension part, wherein the shell pass fixing flange is in sealing connection with the shell pass companion flange and the shell pass companion flange is in sealing connection with the tube plate extension part through a sealing assembly.
The outside of the pipe plate extension part in front of the positioning step is provided with a ring blocking groove, the outside part of the limiting ring is positioned in a limiting concave table arranged on the inner side of the shell pass fixing flange, and the inside part of the limiting ring is positioned in the ring blocking groove.
And the shell side companion flange is provided with a limiting boss positioned on the outer sides of the inner sealing gasket and the pressure ring.
The baffle ring is composed of a left semi-ring and a right semi-ring.
The outer sealing gasket can be a nonmetal, semi-metal, metal flat gasket or metal ring gasket; the inner sealing gasket can be made of metal materials or non-metal materials. When the outer sealing gasket is a flat gasket, the outer sealing gasket can be directly clamped between the stroke fixing flange and the shell stroke companion flange; when the outer sealing gasket is a metal ring gasket, the sealing gasket is preferably positioned in an outer sealing groove formed in the shell side fixing flange and the shell side mating flange correspondingly.
Has the advantages that:
the utility model discloses well bolt and puller bolt can be tightened according to different pretightning forces respectively, guarantee the sealing of inside and outside seal element between shell side mounting flange and the shell side companion flange, carry out the structure of tight seal through adopting different bolt pretightning forces, and it is more reliable to seal under higher pressure, and the effect is better, and than the shell side seal structure that adopts O type rubber seal, suitable pressure, temperature are higher. This reality is novel has sealed effectual, pretightning force is adjustable, is applicable to the advantage of high pressure high temperature operating mode.
Drawings
FIG. 1 is a schematic structural view of a wedge-shaped metal sealing ring seal;
FIG. 2 is a schematic structural view of a seal using an O-ring;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a schematic structural diagram of another embodiment of the present invention;
FIG. 5 is a schematic view of a partially enlarged structure of the inner gasket 7 and the pressure ring 6;
fig. 6 is a top view of the retainer ring.
The device comprises a shell side fixed flange 1, a shell side fixed flange 1.1, a limiting concave table 2, an outer sealing gasket 3, a shell side companion flange 3.1, a limiting boss 3, a top tightening bolt 4, a tube plate extension 5, a positioning step 5.1, a sealing boss 5.2, a ring blocking groove 5.3, a pressure ring 6, an inner sealing gasket 7, a limiting blocking ring 8, a left half ring 8.1, a right half ring 8.2, an outer sealing groove 9, a bolt 10, a wedge-shaped metal sealing ring 11 and an O-shaped rubber sealing ring 12.
Detailed Description
The invention will be further explained with reference to the drawings:
referring to fig. 3, 4 and 5, the shell-side fixing flange 1 and the shell-side companion flange 3, and the shell-side companion flange 3 and the tube plate extension 5 are connected in a sealing manner through a sealing assembly, the tube plate extension 5 is provided with a positioning step 5.1 and a sealing boss 5.2 for mounting a sealing element, and a ring blocking groove 5.3 is formed in the outer side of the tube plate extension in front of the positioning step 5.1.
The sealing assembly comprises an outer sealing gasket 2 positioned between a gap between the shell pass fixing flange 1 and the shell pass companion flange 3, an inner sealing gasket 7 and a pressure ring 6 which are arranged at a positioning step and matched with each other, and a puller bolt 4. The shell side companion flange 3 is connected with the shell side fixed flange 1 through a bolt 10 and is arranged on the outer side behind the tube plate extension part 5; the outer sealing gasket 2 is positioned between the gap between the shell side fixed flange 1 and the shell side companion flange 3, and when the outer sealing gasket 2 is a metal ring gasket, the outer sealing gasket is positioned in an outer sealing groove formed in the shell side fixed flange and the shell side companion flange correspondingly; the inner sealing gasket 7 and the pressing ring 6 are arranged at the mounting step 5.1, and the pressing ring 6 can tightly push the sealing gasket 7 towards the sealing boss 5.2 to realize local gap sealing; the front end of the puller bolt 4 horizontally penetrates through the shell pass companion flange 3 to be in contact with the pressure ring 6, and provides a puller force for the pressure ring 6. Be equipped with spacing boss 3.1 on shell side companion flange 3, spacing boss 3.1 is located the sealed 7 and the clamping ring 6 outside of filling up, and 6 tight sealed 7 deformations of pad when sealing up 7 in top of clamping ring realize with the laminating of the outside lower part of spacing boss 3.1, guarantee sealed effect.
The lateral part of the limit retaining ring 8 is positioned in a limit concave table 1.1 arranged on the inner side of the shell-side fixed flange 1, the inner part of the limit retaining ring is positioned in the retaining ring groove 5.3, and the limit retaining ring 8 is preferably composed of a left half ring 8.1 and a right half ring 8.2 for the convenience of installation.
The outer sealing gasket 2 can be made of nonmetal, semimetal, metal flat gasket or metal ring gasket; the inner sealing gasket 7 can be made of metal materials or non-metal materials; referring to fig. 4, when the outer gasket 2 is a flat gasket, it can be directly clamped between the stroke fixing flange and the shell stroke companion flange; referring to fig. 3, when the outer sealing gasket 2 is a metal ring gasket, the sealing gasket is preferably positioned in an outer sealing groove formed in the shell side fixing flange and the shell side companion flange correspondingly, the structure of the invention can enable the inner sealing gasket and the outer sealing gasket to adopt high-temperature or high-pressure resistant materials and types according to specific working condition requirements, the pretightening force of the inner sealing gasket and the pretightening force of the outer sealing gasket can be adjusted, and the structure of tightening and sealing by adopting different bolt pretightening forces has the advantages of more reliable sealing under higher pressure and better sealing effect.
In addition, since the shell-side companion flange 3 is installed on the outer side behind the tube sheet extension 5, the flange at the tube sheet and the tube box flange (see the dotted line portions of fig. 3 and 4) can be removed and pulled out directly rearward from the tube sheet.
Claims (5)
1. The utility model provides a shell side combination seal structure of hairpin formula heat exchanger, includes shell side mounting flange, shell side companion flange and tube sheet extension, shell side mounting flange and shell side companion flange carry out sealing connection through seal assembly with tube sheet extension, its characterized in that, shell side companion flange install in the outside of tube sheet extension rear, tube sheet extension is equipped with the location step and the sealed boss that are used for the sealing element installation, seal assembly including be located shell side mounting flange and shell side companion flange clearance between the outer gasket, arrange the interior sealed pad and the clamping ring of location step department mutually supporting in, pass shell side companion flange with the front end level with the tight bolt in top of clamping ring contact.
2. The shell-side composite sealing structure of the hairpin heat exchanger as claimed in claim 1, wherein the tube sheet extension in front of the positioning step is provided with a ring-blocking groove on the outside, the outer part of the limiting ring is located in a limiting concave platform provided on the inside of the shell-side fixing flange, and the inner part of the limiting ring is located in the ring-blocking groove.
3. The shell-side combined sealing structure of the hairpin heat exchanger as claimed in claim 2, wherein the shell-side companion flange is provided with a limit boss located outside the inner gasket and the pressure ring.
4. The shell-side composite seal structure of a hairpin heat exchanger as claimed in claim 2, wherein the baffle ring is composed of left and right half rings.
5. The shell-side combined sealing structure of the hairpin heat exchanger as claimed in any one of claims 1 to 3, wherein the outer gasket is located in an outer sealing groove formed in the shell-side fixing flange and the shell-side companion flange correspondingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920619078.XU CN210036404U (en) | 2019-04-30 | 2019-04-30 | Shell side combined sealing structure of hairpin type heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920619078.XU CN210036404U (en) | 2019-04-30 | 2019-04-30 | Shell side combined sealing structure of hairpin type heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210036404U true CN210036404U (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920619078.XU Active CN210036404U (en) | 2019-04-30 | 2019-04-30 | Shell side combined sealing structure of hairpin type heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210036404U (en) |
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2019
- 2019-04-30 CN CN201920619078.XU patent/CN210036404U/en active Active
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| GR01 | Patent grant |