CN102706206B - Connecting structure between heat exchange tube head and tube sheet in waste heat boiler - Google Patents
Connecting structure between heat exchange tube head and tube sheet in waste heat boiler Download PDFInfo
- Publication number
- CN102706206B CN102706206B CN 201210017526 CN201210017526A CN102706206B CN 102706206 B CN102706206 B CN 102706206B CN 201210017526 CN201210017526 CN 201210017526 CN 201210017526 A CN201210017526 A CN 201210017526A CN 102706206 B CN102706206 B CN 102706206B
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- China
- Prior art keywords
- heat exchange
- section
- tube sheet
- pipe head
- exchange tube
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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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- 239000002918 waste heat Substances 0.000 title claims abstract description 10
- 239000011148 porous material Substances 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 13
- 238000005336 cracking Methods 0.000 abstract 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000000498 cooling water Substances 0.000 description 11
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
The invention discloses a connecting structure between a heat exchange tube head and a tube sheet in a waste heat boiler. Cracking of weld joints of the connecting structure is prevented, the connecting structure comprises the heat exchange tube head and the tube sheet, a heat exchange tube hole is arranged on the tube sheet and divided into three sections including a welded section, an anti-puncture section and a flow expansion section sequentially, the anti-puncture section is cylindrical, the flow expansion section is flared, a small-aperture end of the flow expansion section is connected with the anti-puncture section, and the heat exchange tube head is welded with a position, which is located in the welded section, of the tube sheet after penetrating through the flow expansion section and the anti-puncture section. The connecting structure has the advantages that after the heat exchange tube hole is divided into the three sections, the length of a gap between the tube sheet and the heat exchange tube head is reduced, and the problem of cracking of the weld joints of the heat exchange tube head due to sudden change of temperature is avoided.
Description
Technical field
The present invention relates to the syndeton between the heat exchange pipe head and tube sheet in a kind of waste heat boiler.
Background technology
Waste heat boiler is widely used in the industries such as chemical industry, building materials, metallurgy, coking as a kind of device that reclaims the high-temperature gas heat.Be to utilize high-temp waste gas that water is heated, play and reclaim the heat effect, reach the purpose that reduces energy consumption.Wherein the syndeton between heat exchange pipe head and the tube sheet comprises heat exchange pipe head and tube sheet, offers the heat exchange pore on the tube sheet, and the cylindrical shape of heat exchange pore for easy for installation, all is that the aperture of heat exchange pore is greater than the diameter of heat exchange pipe head usually.Heat exchange pipe head passes its end and Tube-sheet Welding behind the heat exchange pore, will form like this a ring gap (place that is not welded to) between tube sheet and the heat exchange pipe head.Because this gap is longer, when reality is used, be positioned at this gap cooling water can't with the gap outside cooling water form good convection current, be specially: the cooling water in the gap with heat exchanger tube in the high-temperature water heat exchange after understand and evaporate and flow away.Because the gap is long, the space is little, in case vacuum of formation that will be of short duration behind the cooling water evaporation in the gap.The heat exchange pipe head tube wall temperature that is positioned at tube sheet is very high, after forming vacuum in the gap, cooling water outside the gap will enter in the gap, and cooling water is understood the temperature that slight reduction is positioned at the heat exchange pipe head tube wall of tube sheet, then again thereupon heat exchange, evaporation of this part cooling water after entering the gap.Will exchange like this heat pipe tube head tube wall and form a cyclic process that heats up and lower the temperature, when the heat exchange pipe head tube wall heated up, the weld seam of heat exchange pipe head expanded by heating exchange heat pipe tube head and tube sheet produced compression; Otherwise when the heat exchange pipe head tube wall temperature reduced, the weld seam that heat exchange pipe head is met cold contraction exchange heat pipe tube head and tube sheet produced tension.Cause weld seam also alternately bearing compression and tension, thereby cause fatigue phenomenon, and then cause and the appearance of bead crack cause at last cooling water leakage, affect the normal operation of heat exchanger.
Summary of the invention
Technical problem to be solved by this invention is: the syndeton between the heat exchange pipe head and tube sheet in the not crackable waste heat boiler of a kind of weld seam is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the syndeton in a kind of waste heat boiler between heat exchange pipe head and the tube sheet, comprise heat exchange pipe head and tube sheet, offer the heat exchange pore on the tube sheet, described heat exchange pore is divided into three sections, be followed successively by welding section, the anti-section of wearing and flow-expanding section, wherein the anti-section of wearing is cylindrical, flow-expanding section is bell mouth shape and the little end of bore links to each other with the anti-section of wearing, and heat exchange pipe head passes flow-expanding section and prevents wearing the position welding that the Duan Houyu tube sheet is positioned at welding section.
The invention has the beneficial effects as follows: after the heat exchange pore is divided into three sections, reduced the gap length between tube sheet and the heat exchange pipe head, the situation of having avoided causing the crack to be split because heat exchange pipe head is sometimes hot and sometimes cold occurs.
Description of drawings
Fig. 1 is the structure chart of the syndeton between heat exchange pipe head and the tube sheet in the waste heat boiler of the present invention;
Fig. 2 is the structure chart of tube sheet among the present invention.
Among the figure: 1, heat exchange pipe head, 2, tube sheet, 3, the heat exchange pore, 4, welding section, 5, the anti-section of wearing, 6, flow-expanding section.
The specific embodiment
Below in conjunction with accompanying drawing, describe specific embodiments of the present invention in detail.
As shown in Figure 1 and Figure 2, syndeton in the waste heat boiler between heat exchange pipe head and the tube sheet, comprise heat exchange pipe head 1 and tube sheet 2, offer heat exchange pore 3 on the tube sheet 2, described heat exchange pore 3 is divided into three sections, be followed successively by welding section 4, the anti-section of wearing 5 and flow-expanding section 6, wherein the shape of welding section 4 is set according to welding process requirement, the anti-section of wearing 5 is cylindrical, flow-expanding section 6 is bell mouth shape and the little end of bore links to each other with the anti-section of wearing 5, and weld at the position that heat exchange pipe head 1 passes after flow-expanding section 6 and the anti-section of wearing 5 and tube sheet 2 is positioned at welding section 4.After heat exchange pore 3 is divided into three sections, so that the length of the gap between tube sheet 2 and the heat exchange pipe head 1 (the anti-section of wearing 5) has reduced greatly.Because this gap length is little, so that the flow of cooling water outside in the gap and the gap is good, the cooling water that so just can not occur in the gap was evaporated afterwards not as good as the situation generation that replenishes cooling water, avoided heat exchange pipe head 1 to cause bond open between heat exchange pipe head 1 and the tube sheet 2 because of sometimes hot and sometimes cold, fastness and the sealing of welding between heat exchange pipe head 1 and the tube sheet 2 have well been guaranteed, guarantee the normal operation of heat exchanger, improved production efficiency.
Claims (1)
1. the syndeton between heat exchange pipe head and the tube sheet in the waste heat boiler, comprise heat exchange pipe head and tube sheet, offer the heat exchange pore on the tube sheet, it is characterized in that: described heat exchange pore is divided into three sections, be followed successively by welding section, the anti-section of wearing and flow-expanding section, wherein the anti-section of wearing is cylindrical, and flow-expanding section is bell mouth shape and the little end of bore links to each other with the anti-section of wearing, and heat exchange pipe head passes flow-expanding section and prevents wearing the position welding that the Duan Houyu tube sheet is positioned at welding section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210017526 CN102706206B (en) | 2012-01-19 | 2012-01-19 | Connecting structure between heat exchange tube head and tube sheet in waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210017526 CN102706206B (en) | 2012-01-19 | 2012-01-19 | Connecting structure between heat exchange tube head and tube sheet in waste heat boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102706206A CN102706206A (en) | 2012-10-03 |
| CN102706206B true CN102706206B (en) | 2013-10-30 |
Family
ID=46899158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210017526 Active CN102706206B (en) | 2012-01-19 | 2012-01-19 | Connecting structure between heat exchange tube head and tube sheet in waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102706206B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553533A (en) * | 2019-09-11 | 2019-12-10 | 上海蓝滨石化设备有限责任公司 | Connecting structure of porous flat tube and tube plate of aluminum air cooler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3827727A (en) * | 1969-11-14 | 1974-08-06 | K Moebius | Constrictor ring and tube joint |
| CN201955012U (en) * | 2011-03-04 | 2011-08-31 | 杭州杭氧换热设备有限公司 | Pipe flat-head welding joint between pipe and pipe sheet |
| CN102305572A (en) * | 2011-05-16 | 2012-01-04 | 四川蓝星机械有限公司 | Connection structure and connection method of heat exchange tube and tube plate |
| CN202403607U (en) * | 2012-01-19 | 2012-08-29 | 江苏普格机械有限公司 | Connecting structure between heat exchange tube head and tube plate in waste heat boiler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004324920A (en) * | 2003-04-22 | 2004-11-18 | Kitashiba Electric Co Ltd | Heat transfer tube and tube sheet joint structure for heat exchanger |
-
2012
- 2012-01-19 CN CN 201210017526 patent/CN102706206B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3827727A (en) * | 1969-11-14 | 1974-08-06 | K Moebius | Constrictor ring and tube joint |
| CN201955012U (en) * | 2011-03-04 | 2011-08-31 | 杭州杭氧换热设备有限公司 | Pipe flat-head welding joint between pipe and pipe sheet |
| CN102305572A (en) * | 2011-05-16 | 2012-01-04 | 四川蓝星机械有限公司 | Connection structure and connection method of heat exchange tube and tube plate |
| CN202403607U (en) * | 2012-01-19 | 2012-08-29 | 江苏普格机械有限公司 | Connecting structure between heat exchange tube head and tube plate in waste heat boiler |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-324920A 2004.11.18 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102706206A (en) | 2012-10-03 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215600 HAIBA Road, Daxin Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: China National Chemical Equipment Technology (Suzhou) Co.,Ltd. Country or region after: China Address before: 215600 Jiangsu Puge Machinery Co., Ltd., HAIBA Road, Daxin Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: JIANGSU PUGE MACHINERY Co.,Ltd. Country or region before: China |