CN112082419A - Air preheater tube plate sealing metal corrugated sleeve structure - Google Patents
Air preheater tube plate sealing metal corrugated sleeve structure Download PDFInfo
- Publication number
- CN112082419A CN112082419A CN201910508796.4A CN201910508796A CN112082419A CN 112082419 A CN112082419 A CN 112082419A CN 201910508796 A CN201910508796 A CN 201910508796A CN 112082419 A CN112082419 A CN 112082419A
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- CN
- China
- Prior art keywords
- metal corrugated
- corrugated sleeve
- cylindrical surface
- inner cylindrical
- heat exchange
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0246—Arrangements for connecting header boxes with flow lines
- F28F9/0248—Arrangements for sealing connectors to header boxes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The air preheater tube plate sealing metal corrugated sleeve structure consists of a metal corrugated sleeve, a base, a pressurizing cylinder, a dustproof cover and fiber packing; the metal corrugated sleeve (1) is made of a metal corrugated pipe, the cross section of the metal corrugated sleeve is S-shaped, and the minimum inner diameter of the metal corrugated sleeve is slightly larger than the outer diameter of the heat exchange pipe; a smooth inner cylindrical surface is arranged in the cylinder of the base, a short inner cylindrical surface and a bottom plane thereof extend from the lower end of the smooth inner cylindrical surface to the inner surface, and the two intersected surfaces are just installation positioning surfaces at the lower end of the metal corrugated sleeve; the outer surface of the pressurizing cylinder is provided with a downward through external thread matched with the internal thread of the base; the lower part of the pressurizing cylinder is provided with a short outer cylindrical surface and a top plane thereof, which are just the installation positioning surfaces at the upper end of the metal corrugated sleeve; the metal corrugated sleeve structure has the advantages that: 1. the metal corrugated sleeve is adopted for sealing the pipe plate, interference fit combination installation is not carried out, and the trouble of using a special tool for strong installation and strong disassembly is avoided; 2. the metal corrugated sleeve has small volume, light weight, trouble-saving processing and low production cost.
Description
Technical Field
The invention relates to chemical equipment, in particular to a sealing structure of a heat exchange tube of a carbon black air preheater on a tube plate hole.
Background
The carbon black air preheater tube plate sealing prior art has a metal sleeve structure, and the working principle of the metal sleeve structure is that the metal sleeve and a heat exchange tube are combined by interference between the metal sleeve and a base to realize the air preheater tube plate sealing; however, the metal sleeve structure has two defects, namely the problem of interference combination; two sets of special tools are required to be prepared for mounting and dismounting the metal sleeve, one set is to mount the metal sleeve by implementing a mechanical press-in method, and the other set is to dismount the metal sleeve by implementing a mechanical traction method, which are both caused by troubles caused by interference combination; the second disadvantage is that the metal sleeve is large in size, and the processing is troublesome and consumes more materials, so that the production cost is high.
Disclosure of Invention
In order to solve the problems, the invention provides an improvement scheme for the prior art, a metal sleeve structure is changed into a metal corrugated sleeve structure, the metal corrugated sleeve is installed firstly and then pressurized, and the metal corrugated sleeve elastically extrudes a base and a heat exchange tube after pressurization to realize tube plate sealing.
The technical scheme adopted by the invention for solving the technical problems is as follows: the air preheater tube plate sealing metal corrugated sleeve structure consists of a metal corrugated sleeve (1), a base (2), a pressurizing cylinder (3), a dustproof cover (4) and fiber fillers (5); the method is characterized in that: the metal corrugated sleeve (1) is made of a metal corrugated pipe, and a section of pipe with a wave pitch, namely a pipe with a wave crest and a wave trough, is taken down from the metal corrugated pipe to be used as the metal corrugated sleeve; the longitudinal section of the metal corrugated sleeve is in an S shape, a vertical center line is drawn on the S-shaped section, and both the upper end boundary and the lower end boundary of the metal corrugated sleeve are positioned on the center line when viewed from the S-shaped section; the minimum inner diameter of the metal corrugated sleeve is slightly larger than the outer diameter of the heat exchange tube; most of the base (2) is a cylinder, and the outer surface of the cylinder is two cylindrical surfaces with a large upper part and a small lower part; the inside of the cylinder is a smooth inner cylindrical surface, and the distance between the smooth inner cylindrical surface and the outer surface of the heat exchange tube is slightly larger than the width of the S-shaped section of the metal corrugated sleeve; processing a section of upward through internal thread (k) on the upper part of the smooth inner cylindrical surface; an annular plate with a short inner cylindrical surface (m) and a bottom plane thereof extends inwards from the lower end of the smooth inner cylindrical surface, and the short inner cylindrical surface (m) and the bottom plane thereof are just the installation positioning surfaces at the lower end of the metal corrugated sleeve; the diameter of the inner hole of the annular plate is slightly larger than the outer diameter of the heat exchange tube; the outer surface of the pressurizing cylinder (3) is provided with a downward through external thread matched with the internal thread (k) of the base, and a polygonal prism used for operating the socket wrench is arranged above the external thread; the inner cylindrical surface at the upper part of the pressurizing cylinder is an upward through internal thread 'g'; the distance between the pitch diameter of the internal thread 'g' and the outer surface of the heat exchange tube is two thirds of the width of the S-shaped section of the metal corrugated sleeve; the lower end of the internal thread g is connected with an inward extending inclined plane; below the inclined plane, there is a ring structure with short outer cylindrical surface (n) and its top plane, which are just the installation positioning surface of the upper end of the metal corrugated sleeve; the diameter of the inner hole of the annular structure is slightly larger than the outer diameter of the heat exchange tube; the dustproof cover (4) is an annular cover, grooves for spinning the dustproof cover are uniformly distributed on the outer circular surface of the cover plate, external threads matched with the internal threads (g) of the pressurizing cylinder are arranged below the cover plate, and the bottom surface of the dustproof cover is an inclined surface; the inner diameter of the dustproof cover is slightly larger than the outer diameter of the heat exchange tube; assembling and using: installing the small cylindrical surface of the base in the hole of the tube plate, and welding the large cylindrical surface of the base with the tube plate; the metal corrugated sleeve is sleeved in an annular gap between the smooth outer surface of the heat exchange tube and the smooth inner cylindrical surface of the base, and the lower end of the metal corrugated sleeve is arranged on the short inner cylindrical surface (m) of the base and the bottom plane of the short inner cylindrical surface; screwing the pressurizing cylinder into the internal thread (k) of the base, and arranging the upper end of the metal corrugated sleeve on the short outer cylindrical surface (n) of the pressurizing cylinder and the top plane of the pressurizing cylinder; continuously screwing in the pressurizing cylinder, axially compressing the metal corrugated sleeve, and simultaneously forcing the metal corrugated sleeve to transversely expand until the wave crests and the wave troughs of the metal corrugated sleeve respectively extrude the smooth inner cylindrical surface of the base and the smooth outer surface of the heat exchange tube tightly so as to achieve the aim of sealing the tube plate of the air preheater; the fiber filler is filled in an annular gap between the inner cylindrical surface of the pressurizing cylinder and the heat exchange tube, and the fiber filler is tightly pressed by the dustproof cover.
The invention has the beneficial effects that: 1. the metal corrugated sleeve is adopted for sealing the pipe plate, interference and combination mounting are not carried out, the trouble of using a special tool for strong mounting and strong dismounting is avoided, and the metal corrugated sleeve is convenient to mount and dismount; 2. the metal corrugated sleeve has smaller volume, lighter weight, less trouble in processing and lower production cost than the metal sleeve.
Drawings
FIG. 1 is a schematic view and an embodiment of the air preheater tube sheet seal metal bellows configuration of the present invention.
FIG. 2 is an enlarged view of "I" in FIG. 1.
FIG. 3 is a view from the direction "C" of FIG. 1.
Fig. 4 is a diagram of the installation effect of the heat exchange tube a in fig. 1 on the assumption that the installation verticality of the tube plate B is not good.
In fig. 1, a metal corrugated sleeve, 2, a base, 3, a pressurizing cylinder, 4, a dustproof cover and 5, fiber filler, A, shows the smooth outer surface of a heat exchange tube, and B, shows a tube plate.
In fig. 2, m denotes a short inner cylindrical surface on the base, n denotes a short outer cylindrical surface on the pressurizing cylinder, k denotes an internal thread on the base, and g denotes an internal thread on the pressurizing cylinder.
Alpha in fig. 4 shows the included angle between the heat exchange tube and the assumed correctly installed heat exchange tube, which is not good enough for the installation verticality of the tube plate.
Detailed Description
The air preheater tube plate sealing metal corrugated sleeve structure consists of a metal corrugated sleeve (1), a base (2), a pressurizing cylinder (3), a dustproof cover (4) and fiber fillers (5); the base is arranged in a tube plate hole and welded on the tube plate, the metal corrugated sleeve is sleeved in an annular gap between the heat exchange tube and the base, the pressurizing cylinder is screwed into the internal thread of the base, the pressurizing cylinder is continuously screwed in, the metal corrugated sleeve is axially compressed, and meanwhile, the metal corrugated sleeve is forced to transversely expand until the wave crest and the wave trough of the metal corrugated sleeve respectively extrude the smooth inner cylindrical surface of the base and the smooth outer surface of the heat exchange tube tightly, so that the aim of sealing the tube plate of the air preheater is fulfilled; the fiber filler is filled in an annular gap between the pressurizing cylinder and the heat exchange tube, and the fiber filler is tightly pressed by the dustproof cover.
Claims (1)
1. The air preheater tube plate sealing metal corrugated sleeve structure consists of a metal corrugated sleeve (1), a base (2), a pressurizing cylinder (3), a dustproof cover (4) and fiber fillers (5); the method is characterized in that: the metal corrugated sleeve (1) is made of a metal corrugated pipe, and a section of pipe with a wave pitch, namely a pipe with a wave crest and a wave trough, is taken down from the metal corrugated pipe to be used as the metal corrugated sleeve; the longitudinal section of the metal corrugated sleeve is in an S shape, a vertical center line is drawn on the S-shaped section, and both the upper end boundary and the lower end boundary of the metal corrugated sleeve are positioned on the center line when viewed from the S-shaped section; the minimum inner diameter of the metal corrugated sleeve is slightly larger than the outer diameter of the heat exchange tube; most of the base (2) is a cylinder, and the outer surface of the cylinder is two cylindrical surfaces with a large upper part and a small lower part; the inside of the cylinder is a smooth inner cylindrical surface, and the distance between the smooth inner cylindrical surface and the outer surface of the heat exchange tube is slightly larger than the width of the S-shaped section of the metal corrugated sleeve; processing a section of upward through internal thread (k) on the upper part of the smooth inner cylindrical surface; an annular plate with a short inner cylindrical surface (m) and a bottom plane thereof extends inwards from the lower end of the smooth inner cylindrical surface, and the short inner cylindrical surface (m) and the bottom plane thereof are just the installation positioning surfaces at the lower end of the metal corrugated sleeve; the diameter of the inner hole of the annular plate is slightly larger than the outer diameter of the heat exchange tube; the outer surface of the pressurizing cylinder (3) is provided with a downward through external thread matched with the internal thread (k) of the base, and a polygonal prism used for operating the socket wrench is arranged above the external thread; the inner cylindrical surface at the upper part of the pressurizing cylinder is an upward through internal thread 'g'; the distance between the pitch diameter of the internal thread 'g' and the outer surface of the heat exchange tube is two thirds of the width of the S-shaped section of the metal corrugated sleeve; the lower end of the internal thread g is connected with an inward extending inclined plane; below the inclined plane, there is a ring structure with short outer cylindrical surface (n) and its top plane, which are just the installation positioning surface of the upper end of the metal corrugated sleeve; the diameter of the inner hole of the annular structure is slightly larger than the outer diameter of the heat exchange tube; the dustproof cover (4) is an annular cover, grooves for spinning the dustproof cover are uniformly distributed on the outer circular surface of the cover plate, external threads matched with the internal threads (g) of the pressurizing cylinder are arranged below the cover plate, and the bottom surface of the dustproof cover is an inclined surface; the inner diameter of the dustproof cover is slightly larger than the outer diameter of the heat exchange tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910508796.4A CN112082419B (en) | 2019-06-13 | 2019-06-13 | Air preheater tube plate sealing metal corrugated sleeve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910508796.4A CN112082419B (en) | 2019-06-13 | 2019-06-13 | Air preheater tube plate sealing metal corrugated sleeve structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112082419A true CN112082419A (en) | 2020-12-15 |
| CN112082419B CN112082419B (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910508796.4A Active CN112082419B (en) | 2019-06-13 | 2019-06-13 | Air preheater tube plate sealing metal corrugated sleeve structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040183262A1 (en) * | 2003-01-15 | 2004-09-23 | Nichias Corporation | Combination metal gasket and seal structure |
| CN102808991A (en) * | 2012-08-10 | 2012-12-05 | 吴忠仪表有限责任公司 | Irregular wavelike sealing device for valve |
| CN205070385U (en) * | 2015-11-10 | 2016-03-02 | 魏德米勒电联接（上海）有限公司 | Quick locking, two O type sealing ring structure's of integral type cable entry |
| CN107449314A (en) * | 2017-07-24 | 2017-12-08 | 青岛德固特节能装备股份有限公司 | A kind of metallic sheath float tube sealing structure |
| CN108644385A (en) * | 2018-06-25 | 2018-10-12 | 杭州新亚低温科技有限公司 | A kind of sealing structure of compressor plunger |
-
2019
- 2019-06-13 CN CN201910508796.4A patent/CN112082419B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040183262A1 (en) * | 2003-01-15 | 2004-09-23 | Nichias Corporation | Combination metal gasket and seal structure |
| CN102808991A (en) * | 2012-08-10 | 2012-12-05 | 吴忠仪表有限责任公司 | Irregular wavelike sealing device for valve |
| CN205070385U (en) * | 2015-11-10 | 2016-03-02 | 魏德米勒电联接（上海）有限公司 | Quick locking, two O type sealing ring structure's of integral type cable entry |
| CN107449314A (en) * | 2017-07-24 | 2017-12-08 | 青岛德固特节能装备股份有限公司 | A kind of metallic sheath float tube sealing structure |
| CN108644385A (en) * | 2018-06-25 | 2018-10-12 | 杭州新亚低温科技有限公司 | A kind of sealing structure of compressor plunger |
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| Publication number | Publication date |
|---|---|
| CN112082419B (en) | 2023-07-07 |
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