CN107262616A - The exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant - Google Patents
The exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant Download PDFInfo
- Publication number
- CN107262616A CN107262616A CN201710571253.8A CN201710571253A CN107262616A CN 107262616 A CN107262616 A CN 107262616A CN 201710571253 A CN201710571253 A CN 201710571253A CN 107262616 A CN107262616 A CN 107262616A
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- China
- Prior art keywords
- welded
- heat exchanger
- tubesheets
- exchanger tube
- swollen
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
The invention discloses the exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on a kind of Heat Exchanger of Nuclear Power Plant, comprise the following steps：Cleaning tubesheet holes with polishing is welded heat exchanger tube treats swollen face；Positioned at the beginning of being welded exchanger tubes and tubesheets hole；Apply low pressure to being welded heat exchanger tube, school circle is welded heat exchanger tube；Continue for some time until being welded heat exchanger tube produces plastic deformation recession except the low pressure to being welded heat exchanger tube application；Exchanger tubes and tubesheets are welded to being welded heat exchanger tube application high pressure compression.By applying low pressure to being welded heat exchanger tube, so that being welded heat exchanger tube in circumferencial direction even inflation and producing plastic deformation, eliminate the roundness deviation being welded on heat exchanger tube, reduce the influence of weld reinforcement, so that there is better seal effect with tubesheet holes during being welded high pressure swelling of the heat exchanger tube after, effectively realized in the case where tubesheet holes is not slotted and be welded being tightly connected for exchanger tubes and tubesheets hole.The present invention is applied to expanded joint technical field.
Description
Technical field
The present invention relates to expanded joint technical field, exchanger tubes and tubesheets are welded on more particularly to a kind of Heat Exchanger of Nuclear Power Plant
The only swollen Joining Technology not welded.
Background technology
, it is necessary to which a large amount of use is welded heat exchanger tube in the manufacturing process of Heat Exchanger of Nuclear Power Plant, be welded heat exchanger tube need with
Tube sheet is tightly connected.In the prior art, due to being welded the roundness deviation, weld reinforcement and intensity non-uniformity of heat exchanger tube to expanded joint
Sealing influence is very big, in order to avoid being welded the leakage of exchanger tubes and tubesheets jointing, it is ensured that the security of equipment, generally uses
Seal welding+intensity is swollen or the connected mode of intensity weldering, and joint is realized by being welded being welded to connect for exchanger tubes and tubesheets
Sealing, but is due to complex process, and because sealing welding technique needs usually to need to tube sheet overlay clad and heat treatment, significantly
Add manufacturing cycle and cost.In addition, tube sheet built-up welding and Seal welding have the probability for necessarily going out defect, so as to cause joint to be let out
Dew.And small defect is difficult directly to be found, also increases the cost of Non-Destructive Testing.In addition, the difficulty that Seal welding is reprocessed
Also it is larger.
The only swollen Joining Technology not welded used on existing other industry heat exchanger is required in tube sheet process ring
Shape stress groove, is on the one hand the introduction of cycle and the cost of annular groove processing, is on the other hand out the heat exchanger tube expanded joint of stress groove
Afterwards, it is very big in the residual stress of slot area, the stress corrosion of this part heat exchanger tube can be accelerated, and easily deposited in annular groove
Hydrops is stayed, can also accelerate the corrosion of tube sheet.
The content of the invention
In order to solve the above problems, it is an object of the invention to provide be welded on a kind of Heat Exchanger of Nuclear Power Plant heat exchanger tube with
The tube sheet only swollen Joining Technology not welded, can be in the case where tubesheet holes be unthreaded hole, to being welded heat exchanger tube and tube sheet expanded joint not
Seal welding is connected.
The technical solution adopted in the present invention is：The exchanger tubes and tubesheets only swollen company do not welded is welded on Heat Exchanger of Nuclear Power Plant
Technique is connect, is comprised the following steps：
A. cleaning tubesheet holes with polishing is welded heat exchanger tube treats swollen face；
B. positioned at the beginning of being welded exchanger tubes and tubesheets hole；
C. low pressure is applied to being welded heat exchanger tube, school circle is welded heat exchanger tube；
D. continue for some time until being welded the stable recession of heat exchanger tube plastic deformation except the low pressure to being welded heat exchanger tube application；
E. exchanger tubes and tubesheets are welded to being welded heat exchanger tube application high pressure compression.
As the further improvement of above-mentioned technical proposal, the low pressure and high pressure are respectively hydraulic pressure.
As the further improvement of above-mentioned technical proposal, applied by hydraulic casing roller and hydraulic expanding rod to being welded heat exchanger tube
Low pressure and high pressure.
As the further improvement of above-mentioned technical proposal, a set of hydraulic pressure is shared to being welded when heat exchanger tube applies low pressure with high pressure
Electric tube expander and hydraulic expanding rod.
As the further improvement of above-mentioned technical proposal, in step c, be welded heat exchanger tube outer wall and tubesheet holes hole wall it
Between gap be gradually reduced but be not affixed.
As the further improvement of above-mentioned technical proposal, in step d, the duration is 5~7s.
As the further improvement of above-mentioned technical proposal, in step e, persistently apply high pressure, high pressure holding to being welded heat exchanger tube
The continuous time is identical with the low pressure duration.
As the further improvement of above-mentioned technical proposal, in step b, pass through the linkage section to being welded exchanger tubes and tubesheets
Carry out mechanical expansion and realize the first positioning for being welded exchanger tubes and tubesheets hole in end.
As the further improvement of above-mentioned technical proposal, the length of the mechanical expansion is 5~15mm.
Beneficial effects of the present invention：The present invention to being welded heat exchanger tube by applying low pressure so that is welded heat exchanger tube in circumference
Direction even inflation simultaneously produces plastic deformation, eliminates the roundness deviation being welded on heat exchanger tube, reduces the influence of weld reinforcement, makes
There is better seal effect with tubesheet holes during high pressure swelling of the heat exchanger tube after must be welded, effectively in tubesheet holes
Realized in the case of not slotting and be welded being tightly connected for exchanger tubes and tubesheets hole.
Brief description of the drawings
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the present invention to being welded pressure and time plot that heat exchanger tube applies；
Fig. 2 is hydraulic expanding rod operating diagram.
Embodiment
The exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on a kind of Heat Exchanger of Nuclear Power Plant, is comprised the following steps：
A. cleaning tubesheet holes with polishing is welded heat exchanger tube treats swollen face；
B. positioned at the beginning of being welded exchanger tubes and tubesheets hole；
C. low pressure is applied to being welded heat exchanger tube, school circle is welded heat exchanger tube；
D. continue for some time until being welded the stable recession of heat exchanger tube plastic deformation except the low pressure to being welded heat exchanger tube application；
E. exchanger tubes and tubesheets are welded to being welded heat exchanger tube application high pressure compression.
It is within 0 to 7 second in Fig. 1 periods of low pressure, is within 8 to 15 seconds high pressure phase, low pressure is moulded for that can make to be welded heat exchanger tube
Property deformation pressure, high pressure is more than twice of low pressure.The present embodiment to being welded heat exchanger tube by applying low pressure so that is welded and changes
Heat pipe is in circumferencial direction even inflation and produces plastic deformation, eliminates the roundness deviation being welded on heat exchanger tube, reduces more than weld seam
High influence so that there is better seal effect with tubesheet holes during being welded high pressure swelling of the heat exchanger tube after, have
Being realized in the case where tubesheet holes is not slotted for effect is welded being tightly connected for exchanger tubes and tubesheets hole.
The low pressure and high pressure are respectively hydraulic pressure, and using the technique of Hydraulic Expansion, the swollen length each compared to mechanical expansion is by swollen
The limitations of factor such as pearl material, electric tube expander torque, expanded joint stability and need carry out multistage expanded joint, Hydraulic Expansion can be once
Property expanded joint complete tube sheet full section, with higher efficiency.
It is preferred that, applied by hydraulic casing roller and hydraulic expanding rod to being welded heat exchanger tube in low pressure and high pressure, the present embodiment
Hydraulic casing roller use numerical control hydraulic electric tube expander, hydraulic expanding rod use O-ring axial seal type hydraulic expanding rod.During Hydraulic Expansion,
With reference to Fig. 2, the insertion of hydraulic expanding rod 1 is welded in heat exchanger tube 2, until the tight sleeve on hydraulic expanding rod 1 is against tube sheet surface, then
Start hydraulic casing roller, water is pressed into hydraulic expanding rod 1 from the afterbody water injection hole of hydraulic expanding rod 1, led to by the piston pump of hydraulic casing roller
Enter on hydraulic expanding rod 1 between two O-rings 11.O-ring 11 is slided until the back-up ring on extruding hydraulic expanding rod 1 is swollen to two ends
It is swollen, so that the extruding of O-ring 11 is welded heat exchange inside pipe wall formation axial seal.Region is high pressure aqua region between two O-rings 11,
Namely Hydraulic expansion-jointing region.O-ring is with being welded the contact area of heat exchanger tube 2 for expanded joint transitional region, because O-ring 11 compares
Relatively soft, to being welded heat exchanger tube 2 without mechanical damage, Hydraulic Expansion transition can also relax very much, and transition region will not produce stress collection
In.
It is preferred that, a set of hydraulic casing roller and hydraulic expanding rod are shared to being welded when heat exchanger tube applies low pressure with high pressure, is worked
Personnel can apply low pressure or high pressure by inputting different parameters to hydraulic casing roller to being welded heat exchanger tube, easy to operate, into
This low, efficiency high.
It is preferred that, in step c, the gap being welded between the outer wall of heat exchanger tube and the hole wall of tubesheet holes is gradually reduced but non-phase
Patch, is welded and keeps certain gap between the outer wall of heat exchanger tube and the hole wall of tubesheet holes to prevent the hole wall of tubesheet holes from hindering to be welded
The school circle of heat exchanger tube.
It is preferred that, in step d, the duration is 5~7s, and the duration in the present embodiment is 6s.
It is preferred that, in step e, persistently apply high pressure, high pressure duration and low pressure duration phase to being welded heat exchanger tube
Together.
It is preferred that, in step b, mechanical expansion realization is carried out by the end of the linkage section to being welded exchanger tubes and tubesheets and is welded
The first positioning in exchanger tubes and tubesheets hole, prevents that be welded heat exchanger tube shifts during Hydraulic Expansion is carried out.
It is preferred that, the length of the mechanical expansion is 5~15mm.
Certainly, the invention is not limited in above-mentioned embodiment, those skilled in the art are without prejudice to the present invention
Equivalent variations or replacement can be also made on the premise of spirit, these equivalent modifications or replacement are all contained in the application claim
In limited range.
Claims (9)
1. the exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant, it is characterised in that including following
Step：
A. cleaning tubesheet holes with polishing is welded heat exchanger tube treats swollen face；
B. positioned at the beginning of being welded exchanger tubes and tubesheets hole；
C. low pressure is applied to being welded heat exchanger tube, school circle is welded heat exchanger tube；
D. continue for some time until being welded the stable recession of heat exchanger tube plastic deformation except the low pressure to being welded heat exchanger tube application；
E. exchanger tubes and tubesheets are welded to being welded heat exchanger tube application high pressure compression.
2. the exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant according to claim 1, its
It is characterised by：The low pressure and high pressure are respectively hydraulic pressure.
3. the exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant according to claim 2, its
It is characterised by：Low pressure and high pressure are applied to being welded heat exchanger tube by hydraulic casing roller and hydraulic expanding rod.
4. the exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant according to claim 3, its
It is characterised by：A set of hydraulic casing roller and hydraulic expanding rod are shared to being welded when heat exchanger tube applies low pressure with high pressure.
5. the exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant according to claim 2, its
It is characterised by：In step c, the gap being welded between the outer wall of heat exchanger tube and the hole wall of tubesheet holes is gradually reduced but is not affixed.
6. the exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant according to claim 2, its
It is characterised by：In step d, the duration is 5~7s.
7. the exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant according to claim 6, its
It is characterised by：In step e, persistently apply high pressure to being welded heat exchanger tube, the high pressure duration is identical with the low pressure duration.
8. the exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant according to claim 2, its
It is characterised by：In step b, mechanical expansion realization is carried out by the end of the linkage section to being welded exchanger tubes and tubesheets and is welded heat exchanger tube
With the first positioning of tubesheet holes.
9. the exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant according to claim 8, its
It is characterised by：The length of the mechanical expansion is 5~15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571253.8A CN107262616A (en) | 2017-07-13 | 2017-07-13 | The exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571253.8A CN107262616A (en) | 2017-07-13 | 2017-07-13 | The exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107262616A true CN107262616A (en) | 2017-10-20 |
Family
ID=60072017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710571253.8A Pending CN107262616A (en) | 2017-07-13 | 2017-07-13 | The exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107262616A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006619A (en) * | 1975-08-07 | 1977-02-08 | James Hilbert Anderson | Tube expander utilizing hydraulically actuated pistons |
| DE3611108C1 (en) * | 1986-04-03 | 1987-07-30 | Balcke Duerr Ag | Method and device for pressure-tight fastening of straight pipes between two pipe disks |
| JPH0647204B2 (en) * | 1985-09-12 | 1994-06-22 | バルケ−デユル・アクチエンゲゼルシヤフト | Device for hydraulic expansion of pipe sections |
| EP0922510B1 (en) * | 1997-12-10 | 2001-08-29 | ALSTOM Power (Schweiz) AG | Method and device for forming a tube in a tube plate |
| CN203184463U (en) * | 2013-03-20 | 2013-09-11 | 四川泸天化股份有限公司 | Rubber expanded connection machine |
-
2017
- 2017-07-13 CN CN201710571253.8A patent/CN107262616A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006619A (en) * | 1975-08-07 | 1977-02-08 | James Hilbert Anderson | Tube expander utilizing hydraulically actuated pistons |
| JPH0647204B2 (en) * | 1985-09-12 | 1994-06-22 | バルケ−デユル・アクチエンゲゼルシヤフト | Device for hydraulic expansion of pipe sections |
| DE3611108C1 (en) * | 1986-04-03 | 1987-07-30 | Balcke Duerr Ag | Method and device for pressure-tight fastening of straight pipes between two pipe disks |
| EP0922510B1 (en) * | 1997-12-10 | 2001-08-29 | ALSTOM Power (Schweiz) AG | Method and device for forming a tube in a tube plate |
| CN203184463U (en) * | 2013-03-20 | 2013-09-11 | 四川泸天化股份有限公司 | Rubber expanded connection machine |
Non-Patent Citations (2)
| Title |
|---|
| 徐刚等: "《石油化工厂设备检修手册换热器（第二版）》", 31 January 2015, 中国石化出版社 * |
| 陈光等: "液压胀管中胀接残余接触压力的理论计算方法及分析", 《电站辅机》 * |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171020 |