CN207127407U - A kind of embedded deep hole welding structure of waste heat boiler flexible tubesheet - Google Patents
A kind of embedded deep hole welding structure of waste heat boiler flexible tubesheet Download PDFInfo
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- CN207127407U CN207127407U CN201720029448.5U CN201720029448U CN207127407U CN 207127407 U CN207127407 U CN 207127407U CN 201720029448 U CN201720029448 U CN 201720029448U CN 207127407 U CN207127407 U CN 207127407U
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Abstract
The embedded deep hole welding structure of a kind of waste heat boiler flexible tubesheet of the present utility model, it is related to the technical field of the boiler plant in oil and coal chemical technology, its structure includes strengthening projection located at the inside pipe wall of flexible tubesheet and the annular of outwardly convex, annular strengthens the pipe outer wall that projection is welded in heat exchanger tube by Deep Hole Welding, the tube head weld seam of so flexible tubesheet and heat exchanger tube can not only obtain the direct cooling of shell side water, effectively reduce tube head weld seam temperature, but also the welded gaps between flexible tubesheet and heat exchanger tube can be eliminated, it can thus 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.
Description
Technical field
The present invention relates to the technical field of the boiler plant in oil and coal chemical technology, more particularly to a kind of waste heat boiler
The embedded deep hole welding structure of flexible tubesheet.
Background technology
In the field 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
Receive using a kind of most universal, most equipment in heat energy technology, the research and extension to new structure waste heat boiler uses, 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 whole waste heat boiler, and most
Weak position, the failure of substantial amounts of waste heat boiler all occur at this position, and the attachment structure at the position is typically using welding
Or expanded joint, but the tube head weld seam 30 for using conventional welding structure (as shown in Figure 1) to be formed is located at high-temperature medium side, manages
For head weld seam 30 because the heating of high-temperature medium can produce thermal stress, these thermal stress are likely to result in stress corrosion and rupture, cause
High temperature failure, and welded gaps be present between tube sheet 10 and heat exchanger tube 20, easily cause crevice corrosion to fail；According to routine
Expansion-joint structure, because expanded joint deformation has larger residual stress, be also easy to produce stress corrosion, and higher in temperature in use
When, the creep of material makes expanded joint residual stress loose, and then causes joint looseness or come off, so as to cause to leak, it follows that
Normal welding structure and conventional expansion-joint structure are not suitable under hot environment, and the technique of the arrival end due to waste heat boiler
Gas may be up to 1200 DEG C, under this worst hot case, normal welding structure and expansion-joint structure easily produce high temperature failure or
Crevice corrosion fails, and reduces the cycle of operation of waste heat boiler significantly, needs to design new attachment structure for this to realize waste heat boiler
The connection of the tube sheet and heat exchanger tube of stove.
The content of the invention
Above-mentioned technical problem be present for prior art, the present invention, which provides one kind, can avoid high temperature failure and crevice corrosion
The embedded deep hole welding structure of waste heat boiler flexible tubesheet of failure.
To achieve the above object, the present invention provides following technical scheme：
There is provided a kind of waste heat boiler flexible tubesheet embedded deep hole welding structure, it is located at the flexible pipe of waste heat boiler arrival end
The junction and/or the flexible tubesheet of the waste heat boiler port of export and the junction of heat exchanger tube of plate and heat exchanger tube, including located at described
The inside pipe wall of flexible tubesheet and the annular of outwardly convex strengthen projection, and the annular reinforcement projection is welded in described by Deep Hole Welding
The pipe outer wall of heat exchanger tube.
Wherein, the annular strengthens the end that projection is located at the flexible tubesheet, and the annular is strengthened projection and scratched with described
Property tube sheet inner tubal wall connection side be inclined-plane.
Wherein, the angle of inclination that the annular strengthens the inclined-plane of projection is 25~35 degree.
Wherein, the annular strengthens the end that projection is located at the flexible tubesheet, and the annular is strengthened projection and scratched with described
Property tube sheet inner tubal wall connection side be cambered surface.
Wherein, the annular reinforcement projection is integrally formed with the flexible tubesheet.
Wherein, the pipe outer wall of the heat exchanger tube is provided with the ring-shaped step of depression, and the annular strengthens projection and is embedded in the ring
Shape step forms lock bottom structure.
Wherein, the ring-shaped step is located at the end of the heat exchanger tube.
Beneficial effects of the present invention：
The embedded deep hole welding structure of waste heat boiler flexible tubesheet of the present invention, its structure are included in the pipe of flexible tubesheet
The annular of wall and outwardly convex strengthens projection, and annular is strengthened the pipe outer wall that projection is welded in heat exchanger tube by Deep Hole Welding, so scratched
Property tube sheet and the tube head weld seam of heat exchanger tube can not only obtain the direct cooling of shell side water, effectively reduce tube head weld seam temperature, and
And the welded gaps between flexible tubesheet and heat exchanger tube can also be eliminated, so rescuing can avoid tube head weld seam that high temperature failure occurs
Failed with crevice corrosion, and then extend the cycle of operation of waste heat boiler.
Brief description of the drawings
Fig. 1 is the structural representation of normal welding structure of the prior art.
Reference in Fig. 1：
10- tube sheets；
20- heat exchanger tubes；
30- tube head weld seams.
Fig. 2 is the structural representation of the flexible tube plate waste heat boiler of the present invention.
Fig. 3 is the structural representation of the embedded deep hole welding structure for connecting tube sheet and heat exchanger tube of the embodiment of the present invention 1, its
The side that middle annular strengthens the inner tubal wall connection of projection and flexible tubesheet is inclined-plane.
Fig. 4 is the structural representation of the embedded deep hole welding structure for connecting tube sheet and heat exchanger tube of the embodiment of the present invention 1, its
The side that middle annular strengthens the inner tubal wall connection of projection and flexible tubesheet is cambered surface.
Fig. 5 is the structural representation of the embedded deep hole welding structure for connecting tube sheet and heat exchanger tube of the embodiment of the present invention 2, its
The side that middle annular strengthens the inner tubal wall connection of projection and flexible tubesheet is inclined-plane.
Fig. 6 is the structural representation of the embedded deep hole welding structure for connecting tube sheet and heat exchanger tube of the embodiment of the present invention 2, its
The side that middle annular strengthens the inner tubal wall connection of projection and flexible tubesheet is cambered surface.
Reference in Fig. 2 to Fig. 6：
1- flexible tubesheets, 11- annulars strengthen projection；
2- heat exchanger tubes, 21- ring-shaped steps；
3- waste heat boiler arrival ends；
The 4- waste heat boiler ports of export.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, the present invention is described in detail.
Embodiment 1
The embedded deep hole welding structure of a kind of waste heat boiler flexible tubesheet of the present embodiment, as shown in Fig. 2 the flexible tubesheet is embedding
Enter formula deep hole welding structure and be not only located at the flexible tubesheet 1 of waste heat boiler arrival end 3 and the junction of heat exchanger tube 2, be also located at used heat
The flexible tubesheet 1 at boiler export end 4 and the junction of heat exchanger tube 2, so embedded deep hole welding structure of flexible tubesheet can be applied
In high-pressure waste-heat boilers and high-temperature technology gas, high-temperature technology gas enters from waste heat boiler arrival end 3, after the heat exchange of heat exchanger tube 2,
Flowed out (arrow indicates in such as Fig. 2) from the waste heat boiler port of export 4 again.
As shown in Figure 3, the embedded deep hole welding structure of the flexible tubesheet include located at flexible tubesheet 1 inside pipe wall and outwards
Raised annular strengthens projection 11, the annular end strengthened projection 11 and be located at flexible tubesheet 1, and annular strengthens projection 11 and flexibility
Tube sheet 1 is integrally formed, and annular strengthens the end that projection 11 is welded in the pipe outer wall of heat exchanger tube 2 by Deep Hole Welding, such flexible pipe
The tube head weld seam of plate 1 and heat exchanger tube 2 can not only obtain the direct cooling of shell side water, effectively reduce tube head weld seam temperature, and
The welded gaps between flexible tubesheet 1 and heat exchanger tube 2 can also be eliminated, so rescuing can avoid tube head weld seam that high temperature failure occurs
Failed with crevice corrosion, and then extend the cycle of operation of waste heat boiler.
As shown in figure 3, it is inclined-plane that annular, which strengthens the side that projection 11 is connected with the inner tubal wall of flexible tubesheet 1, can pass through
Realize between flexible tubesheet 1 and the heat exchanger tube 2 of different pipe thicknesses at the angle of inclination on the inclined-plane that adjustment annular strengthens projection 11
Welding, in the present embodiment, the angle of inclination that annular strengthens the inclined-plane of projection 11 is 25~35 degree.
In the present embodiment, as shown in figure 4, annular can also be strengthened to the side that projection 11 is connected with the inner tubal wall of flexible tubesheet 1
Face is cambered surface, and then realizes flexible tubesheet 1 and different pipe thicknesses by adjusting the angle of the annular cambered surface for strengthening projection 11
Heat exchanger tube 2 between welding.
In the present embodiment, Deep Hole Welding welding first is carried out to the flexible tubesheet 1 and heat exchanger tube 2 of arrival end, heat exchanger tube 2 is through pre-add
Its length can extend after heat, after the length of exchange heat pipe 2 is modified, then the flexible tubesheet 1 of the port of export be entered with heat exchanger tube 2
Row Deep Hole Welding welds, and so can effectively eliminate the temperature distortion of heat exchanger tube 2 at work.
Embodiment 2
The embedded deep hole welding structure of a kind of waste heat boiler flexible tubesheet of the present embodiment, as shown in Fig. 2 flexible tubesheet is embedded in
Formula Deep Hole Welding structure is located at the flexible tubesheet 1 of waste heat boiler arrival end 3 and the junction of heat exchanger tube 2, because waste heat boiler exports
The temperature of the process gas at end 4 is relatively low, and the flexible tubesheet 1 of the waste heat boiler port of export 4 can use routine with the junction of heat exchanger tube 2
Welding structure (as shown in Figure 1), certainly, the flexible tubesheet 1 of the waste heat boiler port of export 4 can also use with the junction of heat exchanger tube 2
In embodiment 1 or the present embodiment the embedded deep hole welding structure of flexible tubesheet 1, so embedded deep hole welding structure of flexible tubesheet
And high-pressure waste-heat boilers and high-temperature technology gas can be used in.
As shown in figure 5, the embedded deep hole welding structure of the flexible tubesheet includes the inside pipe wall and convex located at flexible tubesheet 1
The annular risen strengthens projection 11, and the annular strengthens projection 11 and strengthens projection 11 using the annular in embodiment 1, heat exchanger tube 2
The pipe outer wall of end is provided with the ring-shaped step 21 of depression, and annular strengthens the insertion ring-shaped step 21 of projection 11 and forms lock bottom structure, leads to
Cross Deep Hole Welding to weld annular reinforcement projection 11 with ring-shaped step 21, lock bottom structure enhances flexible tubesheet 1 and heat exchanger tube 2
Tube head weld seam fastness, stability, the lock bottom structure being welded can also obtain the direct cooling of shell side water, effectively reduce
Weld seam temperature, but also the welded gaps between flexible tubesheet 1 and heat exchanger tube 2 can be eliminated, so it is avoided that tube head weld seam is sent out
Raw high temperature failure and crevice corrosion failure, and then extend the cycle of operation of waste heat boiler.
As shown in figure 5, it is inclined-plane that annular, which strengthens the side that projection 11 is connected with the inner tubal wall of flexible tubesheet 1, certainly, such as scheme
Shown in 6, it is cambered surface that also annular can be strengthened into the side that be connected with the inner tubal wall of flexible tubesheet 1 of projection 11, by adjust inclined-plane or
The angle of cambered surface realizes the welding between flexible tubesheet 1 and the heat exchanger tube 2 of different pipe thicknesses.
In the present embodiment, Deep Hole Welding welding first is carried out to the flexible tubesheet 1 and heat exchanger tube 2 of arrival end, heat exchanger tube 2 is through pre-add
Its length can extend after heat, after the length of exchange heat pipe 2 is modified, then the flexible tubesheet 1 of the port of export be entered with heat exchanger tube 2
Row Deep Hole Welding welds, and so can effectively eliminate the temperature distortion of heat exchanger tube 2 at work.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of scope is protected, although being explained with reference to preferred embodiment to the present invention, one of ordinary skill in the art should
Work as understanding, technical scheme can be modified or equivalent substitution, without departing from the reality of technical solution of the present invention
Matter and scope.
Claims (6)
1. a kind of embedded deep hole welding structure of waste heat boiler flexible tubesheet, it is 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：Including located at
The inside pipe wall of the flexible tubesheet and the annular of outwardly convex strengthen projection, and the annular is strengthened projection and is welded in by Deep Hole Welding
The pipe outer wall of the heat exchanger tube；The pipe outer wall of the heat exchanger tube is provided with the ring-shaped step of depression, and the annular strengthens projection insertion
The ring-shaped step forms lock bottom structure.
2. the embedded deep hole welding structure of a kind of waste heat boiler flexible tubesheet according to claim 1, it is characterized in that：The ring
Shape strengthens the end that projection is located at the flexible tubesheet, and the annular strengthens what projection was connected with the inner tubal wall of the flexible tubesheet
Side is inclined-plane.
3. the embedded deep hole welding structure of a kind of waste heat boiler flexible tubesheet according to claim 2, it is characterized in that：The ring
The angle of inclination that shape strengthens the inclined-plane of projection is 25~35 degree.
4. the embedded deep hole welding structure of a kind of waste heat boiler flexible tubesheet according to claim 1, it is characterized in that：The ring
Shape strengthens the end that projection is located at the flexible tubesheet, and the annular strengthens what projection was connected with the inner tubal wall of the flexible tubesheet
Side is cambered surface.
5. the embedded deep hole welding structure of a kind of waste heat boiler flexible tubesheet according to claim 1, it is characterized in that：The ring
Shape is strengthened projection and is integrally formed with the flexible tubesheet.
6. the embedded deep hole welding structure of a kind of waste heat boiler flexible tubesheet according to claim 1, it is characterized in that：The ring
Shape step is located at the end of the heat exchanger tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720029448.5U CN207127407U (en) | 2017-01-11 | 2017-01-11 | A kind of embedded deep hole welding structure of waste heat boiler flexible tubesheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720029448.5U CN207127407U (en) | 2017-01-11 | 2017-01-11 | A kind of embedded deep hole welding structure of waste heat boiler flexible tubesheet |
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| CN207127407U true CN207127407U (en) | 2018-03-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735998A (en) * | 2017-01-11 | 2017-05-31 | 茂名重力石化装备股份公司 | A kind of embedded deep hole welding structure of waste heat boiler flexible tubesheet |
| 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 |
| CN110919229A (en) * | 2018-09-20 | 2020-03-27 | 浙江科诚暖通设备有限公司 | Welding of turning-over section of sealed container |
| CN115013455A (en) * | 2022-05-30 | 2022-09-06 | 上海裴椒汽车部件制造有限公司 | Brake oil pipe joint and forming process thereof |
-
2017
- 2017-01-11 CN CN201720029448.5U patent/CN207127407U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735998A (en) * | 2017-01-11 | 2017-05-31 | 茂名重力石化装备股份公司 | A kind of embedded deep hole welding structure of waste heat boiler flexible tubesheet |
| CN110919229A (en) * | 2018-09-20 | 2020-03-27 | 浙江科诚暖通设备有限公司 | Welding of turning-over section of sealed container |
| 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 |
| CN115013455A (en) * | 2022-05-30 | 2022-09-06 | 上海裴椒汽车部件制造有限公司 | Brake oil pipe joint and forming process thereof |
| CN115013455B (en) * | 2022-05-30 | 2024-05-03 | 上海裴椒汽车部件制造有限公司 | Brake oil pipe joint and forming process thereof |
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