CN107449314A - A kind of metallic sheath float tube sealing structure - Google Patents
A kind of metallic sheath float tube sealing structure Download PDFInfo
- Publication number
- CN107449314A CN107449314A CN201710604734.4A CN201710604734A CN107449314A CN 107449314 A CN107449314 A CN 107449314A CN 201710604734 A CN201710604734 A CN 201710604734A CN 107449314 A CN107449314 A CN 107449314A
- Authority
- CN
- China
- Prior art keywords
- metallic sheath
- base
- inner cylinder
- plane
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2230/00—Sealing means
Abstract
A kind of metallic sheath float tube sealing structure, it is made up of base, metallic sheath, shell, dust cap etc.；Base is fixed on above the tubesheet holes of tube sheet；In the inner cylinder face of base, the contact surface interference fit of metal set upper side is enclosed on heat exchanger tube smooth, cylindrical peripheral surface metallic sheath lower end contact surface interference fit；Upper-end contact face and lower end contact surface of the present invention metallic sheath, are designed as arc surface；Close contact of the arc surface to the face of cylinder is the circular contact line of a closing, when installation has a decentraction to have inclination angle, contact line or the curve of a closing, ellipse is somewhat simply become a little by circle, interference combination sealing on normal design does not influence, the solution for the problem of this exchange heat pipe destroys sealing because of out of plumb tube sheet has huge help, the present invention also adds an operation boss outside metallic sheath, an external screw thread is also additionally arranged on base, this is not only helpful to the reasonable installation of metallic sheath, the not damaged dismounting of metallic sheath is even more realized first.
Description
Technical field
The present invention relates to the float tube sealing structure of a kind of chemical industry equipment, especially carbon black air preheater.
Background technology
The metallic sheath float tube sealing structure (patent No. known to carbon black air preheater：2015101114057) it is that handle is enclosed on
Metallic sheath on heat exchanger tube, in tubesheet holes, tubesheet holes is stretched out in the upper end of metallic sheath and Tube-sheet Welding, lower end；Metallic sheath
Most of length all has space with heat exchanger tube, only has one section of inwardly projecting smooth inner cylinder face in bottom, it and heat exchanger tube
Smooth external cylindrical surface interference fit, metallic sheath holds heat exchanger tube tightly whereby and reaches close airtight.But this known float tube
Sealing structure, can not complete the float tube sealing task of real " close airtight " in practice, and reason is as follows：Carbon black air is pre-
The heat exchanger tube of hot device is formed by the different tube welding of multistage material, and whole pipe is certain not without overall processing linearity
Good, this section of heat exchanger tube put in tubesheet holes is most bad with tube sheet perpendicularity, bad and bring not in order to eliminate perpendicularity
Profit influence, in mounting process special provision " first install heat exchanger tube after metallic sheath is installed, try to ensure that gold when installing metallic sheath
The axiality of category set and heat exchanger tube "；It is to leave between metallic sheath and tubesheet holes but this mounting process does not account for thorough
Gap is adjusted, metallic sheath will be finally welded on tube sheet, after a lap welding seam weld is complete, this axiality adjusted, shouldered
But the huge pulling force of weld seam and be finally deteriorated, axiality does not reach requirement, prevent the smooth, cylindrical peripheral surface of metallic sheath from
Heat exchanger tube smooth, cylindrical peripheral surface is bonded comprehensively, necessarily leads to gas leakage gap, even small gas leakage gap, can also make float tube sealing knot
The sealing property of structure is had a greatly reduced quality.
The content of the invention
In order to solve the above problems, the present invention changes existing float tube sealing structure, is to allow metallic sheath to break away from welding first, its
Secondary is the shape and construction for changing metallic sheath, allow its shape and construction be more beneficial for float tube sealing structure sealing property and can
Operability.
The technical solution adopted for the present invention to solve the technical problems is：A kind of metallic sheath float tube sealing structure, by base
(1), metallic sheath (2), shell (3), dust cap (4) and fiberfill (5) composition；It is characterized in that：Base (1) is an annular seating,
There are periphery, inner hole surface, baseplane and upper plane (s), one section of straight-through smooth inner cylinder face above is processed in inner hole surface
(k), and inner cylinder face root plane (w), one section of straight-through external screw thread (m) above is processed on periphery, and externally threaded
Root plane (c)；The medium position of metallic sheath (2) projects radially outward an operation with upper plane (d) and lower plane (e)
Boss, the upper end of metallic sheath protrude inwardly from one piece of smooth arc surface (f), the outstanding one piece of smooth arc surface in metallic sheath lower end
(g)；Shell (3) is processed into thick-walled pipe, and three inner cylinder faces of Continuous maching, minimum are straight from the top down on the inwall of pipe
Footpath in upper end, slightly larger diameter in centre, maximum gauge in lower end；Connect slightly larger and two inner cylinder faces of maximum gauge
It is a step (n)；One section of straight-through following screw thread (m) is processed on the maximum gauge inner cylinder face of shell lower end；Shell upper
There is outer six aspect (h) of spanner；Between base, metallic sheath and shell and their position relationships between tube sheet and heat exchanger tube
It is as follows：Floor installation is simultaneously welded on above tube sheet (B) tubesheet holes；Outstanding smooth arc surface (g) mistake in metallic sheath lower end
It is full of and coordinates in the smooth inner cylinder face (k) of base, inwardly projecting smooth arc surface (f) interference fit in metal set upper side
It is enclosed on heat exchanger tube smooth, cylindrical peripheral surface；Shell lower end screw thread (m) is screwed into thread root plane (c) on whorl of base (m)
Untill；Enclosure step (n) can prevent metallic sheath movable upwards, and the smooth inner cylinder face (k) of base is skidded off to prevent metallic sheath；
The root plane (w) of base inner cylinder face can prevent metallic sheath movable downwards, to ensure the lower plane (e) of metallic sheath boss and bottom
Between the upper plane (s) of seat, there are enough distances to lay instrument, to dismantle metallic sheath；Between other parts and part do not mentioned
There is appropriate free gap, to ensure that metal is enclosed on installation and has in appropriate free inclination degree；The present invention changes
The installation method of metallic sheath, tube chamber welds with base above tube sheet, then metallic sheath in the inner cylinder face of base；This hair
It is bright the upper end of metallic sheath and the contact surface of heat exchanger tube, the contact surface of the lower end of metallic sheath and the inner cylinder face of base, all design
Into the arc surface on longitudinal profile；And close contact of the arc surface to the face of cylinder is the circular contact line of a closing, work as phase
When mutually installation has a decentraction to have inclination angle, the curve of contact line or a closing, simply somewhat become ellipse by circular
A little exactly, sealing is certainly out of question, and this is to solving the problems, such as that heat exchanger tube out of plumb tube sheet has huge help for circle；Certainly, mutually
There is the installation that a decentraction has an inclination angle, relative to aclinic installation with one heart, the holding dynamics of mutual interference combination is had
Point influences, and the influence as metallic sheath exchanges heat pipe interference combination is to tend to increase enclasping force, if metallic sheath is to base interference combination
Influence be to tend to reduce enclasping force, still, if the pitch angle control of decentraction in certain limit, the holding of interference combination
The variable quantity of power does not influence the sealing property of the interference combination of normal design with regard to very little, and float tube sealing structure of the present invention, is exactly
Can be the pitch angle control of decentraction in small range of structure；Therefore, the imperfect problem of the sealing of float tube sealing structure will
It is solved；The present invention adds an operation boss because metallic sheath is mounted on base outside metallic sheath, also
An external screw thread is additionally arranged on base, this three altogether, not only helpful to the reasonable installation of metallic sheath, even more real first
The not damaged dismounting of existing metallic sheath.
The beneficial effects of the invention are as follows：The one, present invention changes the installation method of metallic sheath, and the lower end of metallic sheath is installed
In the inner cylinder face of base；The present invention sets the contact surface of metal set upper side heat exchanging pipe and lower end to the contact surface of base
Count into arc surface；So, the installation of the installation of metallic sheath and heat exchanger tube, metallic sheath and base, just there is reply a little not
There is solution of an inclination angle problem without influenceing sealing with one heart, to solving the problems, such as that heat exchanger tube out of plumb tube sheet has huge side
Help, therefore, the imperfect problem of sealing of float tube sealing structure will be solved；The two, present invention are due to metallic sheath
On base, an operation boss is added outside metallic sheath, an external screw thread is also additionally arranged on base, this three
Altogether, it is not only helpful to the reasonable installation of metallic sheath, the not damaged dismounting of metallic sheath is even more realized first, can be user
Maintenance of equipment save substantial contribution.
Brief description of the drawings
Fig. 1 is a kind of metallic sheath float tube sealed structural representation of the present invention and embodiment.
Fig. 2 is Fig. 1 " I " enlarged drawing.
Fig. 3 is that installation effect figures of the heat exchanger tube A to tube sheet B out of plumb is assumed in Fig. 1.
1. base in Fig. 1,2. metallic sheaths, 3. shells, 4. dust caps, 5. fiberfill, A. heat exchanger tubes, B. tube sheets.
The upper plane of s. bases in Fig. 2, the smooth inner cylinder face on k. bases, the root of the smooth inner cylinder face on w. bases
Facial planes, the external screw thread on m. bases, the externally threaded root plane on c. bases, the upper plane of operating desk on d. metallic sheaths,
E. on metallic sheath operating desk lower plane, the inwardly projecting smooth arc surface in f. metals set upper side, g. metallic sheaths lower end is to evagination
The smooth arc surface gone out, a step of n. enclosures, the internal thread of m. shells lower end, the die nut of h. shell uppers
Face.
Embodiment
A kind of metallic sheath float tube sealing structure of the present invention be by base (1), metallic sheath (2), shell (3), dust cap (4) and
Fiberfill (5) forms.Floor installation is simultaneously welded on tube sheet (B)；Metallic sheath lower end is arranged on the inner cylinder face (k) of base
In, metal set upper side is enclosed on heat exchanger tube smooth, cylindrical peripheral surface；Shell lower end screw thread (m) is spun on whorl of base (m), and screw thread
Untill being screwed into bottom；
Installation of the base on tube sheet should look after the concentricity of base and tubesheet holes；One can be processed in the top of shell
Individual external screw thread, to install dust cap.
Claims (1)
- A kind of 1. metallic sheath float tube sealing structure, by base (1), metallic sheath (2), shell (3), dust cap (4) and fiberfill (5) form；It is characterized in that：Base (1) is an annular seating, has periphery, inner hole surface, baseplane and upper plane (s), in inner hole surface Upper one section of straight-through smooth inner cylinder face (k) above of processing, and the root plane (w) of inner cylinder face, process one on periphery External screw thread (m) above Duan Zhitong, and externally threaded root plane (c)；The medium position of metallic sheath (2) projects radially outward one The individual operation boss with upper plane (d) and lower plane (e), the upper end of metallic sheath protrude inwardly from one piece of smooth arc surface (f), gold The category set outstanding one piece of smooth arc surface (g) in lower end；Shell (3) is processed into thick-walled pipe, from upper on the inwall of pipe Downward three inner cylinder faces of Continuous maching, minimum diameter in upper end, slightly larger diameter in centre, maximum gauge in lower end； It is a step (n) to connect slightly larger and two inner cylinder faces of maximum gauge；Add on the maximum gauge inner cylinder face of shell lower end The straight-through following screw thread (m) of one section of work；Shell upper has outer six aspect (h) of spanner；Between base, metallic sheath and shell and Their position relationships between tube sheet and heat exchanger tube are as follows：Floor installation is simultaneously welded on above tube sheet (B) tubesheet holes；Metal Outstanding smooth arc surface (g) interference fit in lower end is covered in the smooth inner cylinder face (k) of base, metal set upper side Inwardly projecting smooth arc surface (f) interference fit is enclosed on heat exchanger tube smooth, cylindrical peripheral surface；Shell lower end screw thread (m) is mounted in base On screw thread (m), and untill being screwed into thread root plane (c)；Enclosure step (n) can prevent metallic sheath movable upwards, to prevent Metallic sheath skids off the smooth inner cylinder face (k) of base；The root plane (w) of base inner cylinder face can prevent metallic sheath from living downwards It is dynamic, to ensure between the lower plane (e) of metallic sheath boss and the upper plane (s) of base, there are enough distances to lay instrument, to Dismantle metallic sheath；There is appropriate free gap between other parts and part do not mentioned, to ensure that metal is enclosed on installation and use In have appropriate free inclination degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710604734.4A CN107449314B (en) | 2017-07-24 | 2017-07-24 | A kind of metallic sheath float tube sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710604734.4A CN107449314B (en) | 2017-07-24 | 2017-07-24 | A kind of metallic sheath float tube sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107449314A true CN107449314A (en) | 2017-12-08 |
| CN107449314B CN107449314B (en) | 2019-02-22 |
Family
ID=60487465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710604734.4A Active CN107449314B (en) | 2017-07-24 | 2017-07-24 | A kind of metallic sheath float tube sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107449314B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082419A (en) * | 2019-06-13 | 2020-12-15 | 青岛德固特节能装备股份有限公司 | Air preheater tube plate sealing metal corrugated sleeve structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0259895A1 (en) * | 1983-03-28 | 1988-03-16 | Tui Industries | Shell and tube heat exchanger |
| CN201302420Y (en) * | 2008-11-06 | 2009-09-02 | 青岛德固特机械制造有限公司 | Sealing structure of floating pipe of air preheater |
| CN103672943A (en) * | 2013-04-12 | 2014-03-26 | 青岛德固特节能装备股份有限公司 | Elastic sealing sleeve device for floating tube sealing of air pre-heater |
| CN104713404A (en) * | 2015-03-14 | 2015-06-17 | 青岛德固特节能装备股份有限公司 | Vertical column tube heat exchanger floating tube sealing structure |
-
2017
- 2017-07-24 CN CN201710604734.4A patent/CN107449314B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0259895A1 (en) * | 1983-03-28 | 1988-03-16 | Tui Industries | Shell and tube heat exchanger |
| CN201302420Y (en) * | 2008-11-06 | 2009-09-02 | 青岛德固特机械制造有限公司 | Sealing structure of floating pipe of air preheater |
| CN103672943A (en) * | 2013-04-12 | 2014-03-26 | 青岛德固特节能装备股份有限公司 | Elastic sealing sleeve device for floating tube sealing of air pre-heater |
| CN104713404A (en) * | 2015-03-14 | 2015-06-17 | 青岛德固特节能装备股份有限公司 | Vertical column tube heat exchanger floating tube sealing structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082419A (en) * | 2019-06-13 | 2020-12-15 | 青岛德固特节能装备股份有限公司 | Air preheater tube plate sealing metal corrugated sleeve structure |
| CN112082419B (en) * | 2019-06-13 | 2023-07-07 | 青岛德固特节能装备股份有限公司 | Air preheater tube plate sealing metal corrugated sleeve structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107449314B (en) | 2019-02-22 |
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