CN207472122U - Flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure and waste heat boiler - Google Patents
Flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure and waste heat boiler Download PDFInfo
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- CN207472122U CN207472122U CN201721576099.5U CN201721576099U CN207472122U CN 207472122 U CN207472122 U CN 207472122U CN 201721576099 U CN201721576099 U CN 201721576099U CN 207472122 U CN207472122 U CN 207472122U
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- heat exchanger
- exchanger tube
- deep hole
- flexible tubesheet
- welding structure
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Abstract
Flexible tubesheet and heavy wall the heat exchange pipe built Deep Hole Welding structure of the utility model, its inside pipe wall by the one end being inserted into heat exchanger tube in flexible tubesheet sets the annular groove of indent, and then the wall thickness of heat exchanger tube can be thinned, the tube wall that heat exchanger tube surrounds annular groove is the girth weld of heat exchanger tube, after the wall thickness reduction of heat exchanger tube, the welding structure complete penetration that the girth weld of heat exchanger tube and flexible tubesheet are formed by embedded Deep Hole Welding, realize single-sided welding weldering, the welding effect of double-faced forming, and then it can effectively avoid tube head weld seam that high temperature failure and crevice corrosion failure occurs, and then extend the cycle of operation of waste heat boiler.Waste heat boiler with above-mentioned deep hole welding structure, it can be ensured that the welding structure complete penetration between heat exchanger tube and flexible tubesheet, so as to extend the cycle of operation of waste heat boiler.
Description
Technical field
The utility model is related to the boiler plant technical field in oil and coal chemical technology, more particularly to a kind of flexible pipe
Plate and heavy wall heat exchange pipe built Deep Hole Welding structure and waste heat boiler.
Background technology
In the fields such as petroleum refining and chemical industry, coal chemical industry, the technical research of energy-saving and emission-reduction is increasing, and waste heat boiler is back
It receives in heat energy technology using a kind of most universal, most equipment, the research and extension of new structure waste heat boiler is used, it will be right
Energy conservation serves particularly important.
At present, the tube sheet of waste heat boiler and the junction of heat exchanger tube are the most crucial positions of entire waste heat boiler and most
Weak position, the failure of a large amount of waste heat boiler are all happened at this position, and the connection structure at the position is generally embedded
Deep hole welding structure.But in the case where the wall thickness of heat exchanger tube is thicker, it can not be protected using existing embedded deep hole welding structure
Weld seam complete penetraction and fusion in welding is demonstrate,proved, so as to be easy to cause high temperature failure and crevice corrosion failure, and then reduces the cycle of operation of waste heat boiler
Invention content
For the prior art, there are above-mentioned technical problems, and the utility model offer is a kind of can to ensure what weld seam all penetrated
Flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure and the waste heat boiler with the deep hole welding structure.
To achieve the above object, the utility model provides following technical scheme：
A kind of flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure are provided, are located at scratching for waste heat boiler arrival end
The junction and/or the flexible tubesheet of the waste heat boiler port of export of property tube sheet and heat exchanger tube and the junction of heat exchanger tube, heat exchanger tube are
Thick-walled pipe, the inside pipe wall that heat exchanger tube is inserted into the one end in flexible tubesheet are equipped with the annular groove of indent so that the wall of heat exchanger tube is thinned
Thickness, the tube wall that heat exchanger tube surrounds annular groove are girth weld, and girth weld is inserted into flexible tubesheet and passes through embedded
Deep Hole Welding is welded on flexible tubesheet.
Wherein, the inside pipe wall for the one end that flexible tubesheet is inserted into for heat exchanger tube is equipped with the annular lug of evagination, annular solder
Portion is welded on annular lug by embedded Deep Hole Welding.
Wherein, the side that the annular lug is connect with the inner tubal wall of the flexible tubesheet is inclined-plane.
Wherein, the angle of inclination on the inclined-plane of the annular lug is 25~35 degree.
Wherein, the side that the annular lug is connect with the inner tubal wall of the flexible tubesheet is cambered surface.
Wherein, the shaft section of the annular groove along the axial direction of heat exchanger tube is rectangle.
Wherein, the heat exchanger tube is inserted into ring-shaped step of the pipe outer wall of the one end in flexible tubesheet equipped with recess, described
Annular lug is embedded in the ring-shaped step and forms lock to structure.
Wherein, along the axial direction of heat exchanger tube, the width of annular groove is more than the width of annular lug.
Wherein, along the axial direction of heat exchanger tube, the width of annular groove is less than the width of annular lug.
A kind of waste heat boiler is also provided, including the embedded deep hole welding structure.
The beneficial effects of the utility model：
The embedded deep hole welding structure of the utility model, by being inserted into the pipe of the one end in flexible tubesheet in heat exchanger tube
Wall sets the annular groove of indent, and then the wall thickness of heat exchanger tube can be thinned, and heat exchanger tube surrounds the tube wall of annular groove to change
The girth weld of heat pipe, after the wall thickness reduction of heat exchanger tube so that the girth weld of heat exchanger tube passes through insertion with flexible tubesheet
The welding structure that formula Deep Hole Welding is formed can complete penetration, realize single-sided welding weldering, the welding effect of double-faced forming, Jin Erneng
It is enough effectively to avoid tube head weld seam that high temperature failure and crevice corrosion failure occurs, and then extend the cycle of operation of waste heat boiler.
The waste heat boiler of the utility model, with above-mentioned embedded deep hole welding structure, it can be ensured that the ring of heat exchanger tube
Welding structure complete penetration between shape weld part and flexible tubesheet is welded so as to fulfill single-sided welding, the welding effect of double-faced forming
Fruit, and then can effectively avoid tube head weld seam that high temperature failure and crevice corrosion failure occurs, reach and extend waste heat boiler operation week
The purpose of phase.
Description of the drawings
Fig. 1 is that the heat exchanger tube of the utility model is not inserted into the structure diagram of flexible tubesheet.
Fig. 2 has the structure diagram of annular lug for flexible tubesheet in the embedded deep hole welding structure of the utility model.
Fig. 3 is that the embedded deep hole welding structure of the utility model has structure diagram of the lock to structure.
Reference numeral in Fig. 1 to Fig. 3：
1- flexible tubesheets, 11- annular lugs；
2- heat exchanger tubes, 21- annular grooves, 22- girth welds, 23- ring-shaped steps.
Specific embodiment
The utility model is described in detail below in conjunction with specific embodiment and attached drawing.
A kind of flexible tubesheet and heavy wall the heat exchange pipe built Deep Hole Welding structure and waste heat boiler of the present embodiment, are located at useless
The flexible tubesheet 1 of heat boiler arrival end and the flexible tubesheet 1 of the junction of heat exchanger tube 2 and/or the waste heat boiler port of export and heat exchange
The junction of pipe 2.As shown in Figure 1, heat exchanger tube 2 is thick-walled pipe, heat exchanger tube 2 is inserted into the inside pipe wall of the one end in flexible tubesheet 1
Annular groove 21 equipped with indent, and then the wall thickness of heat exchanger tube 2 can be thinned.Axis of the annular groove along the axial direction of heat exchanger tube
Rectangular cross-section is processed convenient for it.The tube wall that heat exchanger tube 2 surrounds annular groove 21 is the girth weld 22 of heat exchanger tube 2, is changed
After the wall thickness reduction of heat pipe 2 so that the girth weld 22 of heat exchanger tube 2 is formed with flexible tubesheet 1 by embedded Deep Hole Welding
Welding structure can complete penetration, realize single-sided welding weldering, the welding effect of double-faced forming, and then can effectively avoid tube head
High temperature failure and crevice corrosion failure occur for weld seam, and then extend the cycle of operation of waste heat boiler.
Referring to Fig. 2, flexible tubesheet 1 is equipped with the annular lug 11 of evagination, ring for the inside pipe wall of one end that heat exchanger tube 2 is inserted into
Shape weld part 22 is welded on annular lug 11 by embedded Deep Hole Welding.Annular lug 11 and girth weld 22 are all very thin,
During embedded Deep Hole Welding welding, the welding structure through welding between annular lug 11 and girth weld 22 can further ensure that,
And welding efficiency is high.In the present embodiment, along the axial direction of heat exchanger tube 2, the width of annular groove 21 is more than annular lug 11
Width, referring to (a) in Fig. 2；Certainly, along the axial direction of heat exchanger tube 2, the width of annular groove 21 might be less that ring
The width of shape convex block 11, referring to (b) in Fig. 2.The width value of annular groove 21 is set according to actual needs.
Further, the side that annular lug 11 is connect with the inner tubal wall of flexible tubesheet 1 is cambered surface, certainly, annular lug
11 sides being connect with the inner tubal wall of flexible tubesheet 1 may be inclined-plane, wherein, the angle of inclination on the inclined-plane of annular lug 11 is
25~35 degree.
In the present embodiment, annular lug 11 is integrally formed with flexible tubesheet 1, it is ensured that annular lug 11 connects flexible tubesheet 1
With the fastness of heat exchanger tube 2.
Shown in Figure 3, the pipe outer wall that heat exchanger tube 2 is inserted into the one end in flexible tubesheet 1 is equipped with the ring-shaped step being recessed
23, annular lug 11 is embedded in ring-shaped step 23 and forms lock to structure.Lock enables to heat exchanger tube 2 to be welded with flexible tubesheet 1 to structure
Positioning when connecing is more accurate and efficiently, and after welding, and lock supports structure fusion together, can enhance flexible tubesheet 1 with
Fastness, the stability of the weld seam of heat exchanger tube 2.In addition, lock also causes the welding between heat exchanger tube 2 and flexible tubesheet 1 to structure
Structure is easier to penetrate, and improves welding efficiency.
Waste heat boiler with above-mentioned embedded deep hole welding structure, it can be ensured that the girth weld 22 of heat exchanger tube 2 is with scratching
Property tube sheet 1 between welding structure complete penetration, welded so as to fulfill single-sided welding, the welding effect of double-faced forming, and then can
It effectively avoids tube head weld seam that high temperature failure and crevice corrosion failure occurs, achievees the purpose that extend the waste heat boiler cycle of operation.
Finally it should be noted that above example is only to illustrate the technical solution of the utility model rather than to this reality
With the limitation of novel protected range, although being explained in detail with reference to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be modified or replaced equivalently to the technical solution of the utility model, without departing from this
The spirit and scope of utility model technical solution.
Claims (10)
1. flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure, are located at the flexible tubesheet of waste heat boiler arrival end with changing
The junction of heat pipe and/or the flexible tubesheet of the waste heat boiler port of export and the junction of heat exchanger tube, it is characterised in that：Heat exchanger tube is
Thick-walled pipe, the inside pipe wall that heat exchanger tube is inserted into the one end in flexible tubesheet are equipped with the annular groove of indent so that the wall of heat exchanger tube is thinned
Thickness, the tube wall that heat exchanger tube surrounds annular groove are girth weld, and girth weld is inserted into flexible tubesheet and passes through embedded
Deep Hole Welding is welded on flexible tubesheet.
2. flexible tubesheet according to claim 1 and heavy wall heat exchange pipe built Deep Hole Welding structure, it is characterized in that：Flexible pipe
The inside pipe wall for the one end that plate is inserted into for heat exchanger tube is equipped with the annular lug of evagination, and girth weld is welded by embedded Deep Hole Welding
It is connected on annular lug.
3. flexible tubesheet according to claim 2 and heavy wall heat exchange pipe built Deep Hole Welding structure, it is characterized in that：The ring
The side that shape convex block is connect with the inner tubal wall of the flexible tubesheet is inclined-plane.
4. flexible tubesheet according to claim 3 and heavy wall heat exchange pipe built Deep Hole Welding structure, it is characterized in that：The ring
The angle of inclination on the inclined-plane of shape convex block is 25~35 degree.
5. flexible tubesheet according to claim 2 and heavy wall heat exchange pipe built Deep Hole Welding structure, it is characterized in that：The ring
The side that shape convex block is connect with the inner tubal wall of the flexible tubesheet is cambered surface.
6. according to claim 2-5 any one of them flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure, feature
It is：The shaft section of the annular groove along the axial direction of heat exchanger tube is rectangle.
7. according to claim 2-5 any one of them flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure, feature
It is：The pipe outer wall that the heat exchanger tube is inserted into the one end in flexible tubesheet is equipped with the ring-shaped step being recessed, and the annular lug is embedding
Enter the ring-shaped step and form lock to structure.
8. according to claim 2-5 any one of them flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure, feature
It is：Along the axial direction of heat exchanger tube, the width of annular groove is more than the width of annular lug.
9. according to claim 2-5 any one of them flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure, feature
It is：Along the axial direction of heat exchanger tube, the width of annular groove is less than the width of annular lug.
10. waste heat boiler, including the embedded deep hole welding structure of claim 1-9 any one of them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721576099.5U CN207472122U (en) | 2017-11-20 | 2017-11-20 | Flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure and waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721576099.5U CN207472122U (en) | 2017-11-20 | 2017-11-20 | Flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure and waste heat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207472122U true CN207472122U (en) | 2018-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721576099.5U Active CN207472122U (en) | 2017-11-20 | 2017-11-20 | Flexible tubesheet and heavy wall heat exchange pipe built Deep Hole Welding structure and waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207472122U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111791035A (en) * | 2020-07-21 | 2020-10-20 | 山西丰喜化工设备有限公司 | Manufacturing method of high-pressure-resistant and corrosion-resistant heat exchanger shell side exhaust structure |
-
2017
- 2017-11-20 CN CN201721576099.5U patent/CN207472122U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111791035A (en) * | 2020-07-21 | 2020-10-20 | 山西丰喜化工设备有限公司 | Manufacturing method of high-pressure-resistant and corrosion-resistant heat exchanger shell side exhaust structure |
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