CN106544493A - The heat treatment method of attachment weld between the hand hole pipe of pipeline and end cap - Google Patents
The heat treatment method of attachment weld between the hand hole pipe of pipeline and end cap Download PDFInfo
- Publication number
- CN106544493A CN106544493A CN201610911195.4A CN201610911195A CN106544493A CN 106544493 A CN106544493 A CN 106544493A CN 201610911195 A CN201610911195 A CN 201610911195A CN 106544493 A CN106544493 A CN 106544493A
- Authority
- CN
- China
- Prior art keywords
- hand hole
- heat treatment
- end cap
- hole pipe
- auxiliary tube
- Prior art date
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses between the hand hole pipe and end cap of a kind of pipeline attachment weld heat treatment method, the hand hole pipe (2) is connected to the end wall of the periphery wall and/or cecum of the pipeline (1), the free end of the hand hole pipe (2) is welded to connect by attachment weld (4) with the end cap (3), and the heat treatment method includes：S1, connection auxiliary tube (6) on the outer face of the end cap (3)；S2, around the hand hole pipe (2), the end cap (3) and the auxiliary tube (6) periphery arrange heating element heater (9)；S3, the startup heating element heater (9) carry out heat treatment to the attachment weld (4).By above-mentioned technical proposal, by connecting auxiliary tube on the end cap of hand hole pipe, therefore, it can extend heating region of the attachment weld in end cap side so that the heating-up temperature of attachment weld both sides can keep basically identical, so as to improve thermal treatment quality.
Description
Technical field
The present invention relates to heat treatment method, in particular it relates between the hand hole pipe and end cap of a kind of pipeline attachment weld heat
Processing method.
Background technology
At present, four big pipeline of large-scale power station unit (main steam line, reheated steam hot arc pipeline, cold section of pipe of reheated steam
Road, main feed water pipe road) etc. the various headers that use of pressure pipeline, including economizer system header, water-cooling wall header, superheater system
System header, reheater system header etc..
In order to unit manufacture, repair and maintenance need, hand hole pipe is typically provided with large diameter pipelines such as pressure pipeline, headers,
Handss can be stretched into by the hand hole pipe and carry out inside pipeline related operation.Such hand hole pipe has been welded when manufacturing greatly
Into whole heavy caliber header pipeline can be put into hot place together with small-bore hand hole pipe by post weld heat treatment if desired
Bulk heat treatmet is carried out in reason stove, as heat-treatment furnace bulk temperature is than more uniform, temperature control also relatively simple convenience, so hand hole
Than more uniform, effect preferably, is also for weld seam heat treatment between hand hole pipe and end cover to the heat treatment of upper welding point
Reliable means.
However, the unit after being on active service of going into operation, when checking inside to header, pipeline, needs to cut open hand hole tube end,
Welding, heat treatment work are re-started after inspection, and scene do not possess pipeline, header and enters heat-treatment furnace bulk heat treatmet condition,
Local heat treatmet can only be carried out.For example, the heating such as winding heating plate can be wrapped up on hand hole pipe, but such mode of heating adds
Thermic load is simultaneously uneven, and thermal effectiveness is bad.
The content of the invention
It is an object of the invention to provide a kind of method that can improve hand hole pipe weld seam thermal treatment quality.
To achieve these goals, the present invention provides a kind of heat treatment side of attachment weld between the hand hole pipe and end cap of pipeline
Method, the hand hole pipe are connected to the end wall of the periphery wall and/or cecum of the pipeline, the free end of the hand hole pipe and the end cap
It is welded to connect by attachment weld, the heat treatment method includes：
S1, connect auxiliary tube on the outer face of the end cap；
S2, around the hand hole pipe, the end cap and the auxiliary tube periphery arrange heating element heater；
S3, the startup heating element heater carry out heat treatment to the attachment weld.
Preferably, in the heating element heater in the heating region for being formed, the attachment weld is along the hand hole pipe
It is axially located the central area of the heating region.
Preferably, the auxiliary tube is by making with the hand hole pipe identical material.
Preferably, the external diameter and pipe thickness of the auxiliary tube are identical with the hand hole pipe.
Preferably, the length of the auxiliary tube is not less than the length sum of the hand hole pipe and the end cap.
Preferably, the mouth of pipe of the free end of the auxiliary tube is filled with thermal-insulating sealing part, to prevent inside the auxiliary tube
Thermal convection current is formed with outside.
Preferably, the thermal-insulating sealing part is heat-preservation cotton.
Preferably, the auxiliary tube is welded to connect by circumferentially spaced multiple pads with the end cap.
Preferably, the heating element heater includes heating rope, in step S2, the heating rope is wrapped in the handss
The periphery of Kong Guan, the end cap and the auxiliary tube forms heating coil.
Preferably, the axial length of the heating coil is not less than 12cm.
By above-mentioned technical proposal, by connecting auxiliary tube on the end cap of hand hole pipe, therefore, it can extend attachment weld
In the heating region of end cap side so that the heating-up temperature of attachment weld both sides can keep basically identical, so as to improve hot place
Reason quality.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of structural representation of the pipeline of specific embodiment of the invention.
Fig. 2 is the structural representation after a kind of pipeline connection auxiliary tube of specific embodiment of the invention.
Fig. 3 is the structural representation after a kind of hand hole pipe winding heating rope of the pipeline of specific embodiment of the invention
Figure.
Description of reference numerals
1 pipeline, 2 hand hole pipe
3 end cap, 4 attachment weld
5 branched pipe, 6 auxiliary tube
7 pad, 8 thermal-insulating sealing part
9 heating element heaters
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
The invention provides between the hand hole pipe and end cap of a kind of pipeline attachment weld heat treatment method, the hand hole pipe 2
The end wall of the periphery wall and/or cecum of the pipeline 1 is connected to, the free end of the hand hole pipe 2 is with the end cap 3 by being connected weldering
Seam 4 is welded to connect, and the heat treatment method includes：
S1, on the outer face of the end cap 3 connect auxiliary tube 6；
S2, around the hand hole pipe 2, the end cap 3 and the auxiliary tube 6 periphery arrange heating element heater 9；
S3, start described 9 pairs of attachment welds of heating element heater 4 and carry out heat treatment.
Fig. 1 show a kind of structure of pipeline, that is, header, and multiple branched pipes 5 are connected with the side wall of the header, collection
Fluid from branched pipe 5 can be collected by case, or will distribute fluid to multiple branched pipes 5 and export.As shown in Fig. 2
As auxiliary tube 6 is connected on end cap 3, therefore heating element heater can be arranged on auxiliary tube 6, extend attachment weld 4 at end
The heating region of 3 side of lid, solves the problems, such as that the heating output of 3 side of end cap is inadequate so that the heat output of 4 both sides of attachment weld
Particularly temperature keeps essentially identical, improves thermal effectiveness.
Further, in the heating element heater 9 in the heating region for being formed, the attachment weld 4 is along the hand hole
The central area for being axially located the heating region of pipe 2.That is, the length phase of the heating region of 4 both sides of attachment weld
Together, so as to heat output tends to keep basically identical, the temperature that 4 both sides of attachment weld can reach also keeps basic one
Cause so that the temperature of attachment weld 4 is more uniformly distributed, and the thermal loss of the attachment weld 4 in central area is also minimum, more
Target temperature is reached easily and save energy consumption.
In addition, the auxiliary tube 6 is by making with 2 identical material of the hand hole pipe.Adopt and hand hole pipe 2 in auxiliary tube 6
During identical material, the various physical properties of 4 two side portions of attachment weld more they tend to it is basically identical, for example, the coefficient of heat conduction, heat
Constriction coefficient etc., this can further ensure that the heating-up temperature of 4 both sides of attachment weld keeps same or like, improve heat treatment
Quality.
Further, the external diameter and pipe thickness of the auxiliary tube 6 are identical with the hand hole pipe 2.The such auxiliary of design
Pipe 6, on the one hand, after auxiliary tube 6 is connected to end cap 3, hand hole pipe 2, end cap 3 and auxiliary tube 6 form the pipe of approximately " one integrated mass "
Part, the pipe fitting stretched out from header more like single pipe fitting, the setting of this more convenient heating element heater 9, particularly as described in lower section
In the case of the outside winding heating rope of pipe fitting, on the other hand, the pipe fitting of 4 both sides of attachment weld is further tended to unanimously, both sides
Heating-up temperature more they tend to unanimously.
Specifically, the length of the auxiliary tube 6 is not less than the length sum of the hand hole pipe 2 and the end cap 3.Auxiliary tube
6 have enough length, are to arrange heating element heater 9 to provide enough surpluses, can arrange foot in the both sides of attachment weld 4
Enough long heating regions, i.e. heating element heater.Wherein, auxiliary tube 6 is coaxially connected with hand hole pipe 2.
In addition, the mouth of pipe of the free end of the auxiliary tube 6 is filled with thermal-insulating sealing part 8, to prevent inside the auxiliary tube 6
Thermal convection current is formed with outside.The other end of hand hole pipe 2 is connected to pipeline 1, and thermal losses is relatively small, therefore, in auxiliary tube 6
Thermal-insulating sealing part 8 is filled at the mouth of pipe, the air-flow that the high temperature gas flow inside auxiliary tube 6 can be avoided relatively low with external temperature forms right
Stream, prevents the temperature of auxiliary tube 6 is reduced by such heat loss through convection.
Specifically, the thermal-insulating sealing part 8 is heat-preservation cotton.On the one hand heat-preservation cotton is separated by inside and outside air-flow, it is to avoid formed
Thermal convection current, on the other hand can also reduce conduction of heat.Certainly, thermal-insulating sealing part 8 can also be the lid of the closure mouth of pipe, Huo Zheqi
His insulation material.
In addition, auxiliary tube 6 can have various with the connected mode of end cap 3, for example, it is welded to connect, glue connection etc., preferably
Ground, the auxiliary tube 6 are welded to connect by circumferentially spaced multiple pads 7 with the end cap 3.That is.Auxiliary
Pipe 6 is connected to end cap 3 by spot welding mode, and end cap 3 is connected to auxiliary tube 6 in circumferential multiple spot weldings, such that it is able in heat
More easily dismantle auxiliary tube 6 after the completion of process, and due to auxiliary tube 6 it is weaker with the bonding strength of end cap 3, opposite end during dismounting
The impact of lid 3 is also less, it is to avoid end cap 3 is damaged, in addition, the heating-up temperature of attachment weld 4 is mainly realized by heating element heater 9,
Rather than the heat come from the conduction of auxiliary tube 6, conversely, the temperature of the attachment weld 4 in central area is relatively higher, heat
Conduct from attachment weld 4 to both sides, therefore, can also be reduced to the heat of auxiliary tube 6 by the connection of several pads 7 and be conducted.
Specifically, the heating element heater 9 includes heating rope, in step S2, the heating rope is wrapped in described
The periphery of hand hole pipe 2, the end cap 3 and the auxiliary tube 6 forms heating coil.The pliability of heating rope preferably, can be tighter
Hand hole pipe 2, end cap 3 and auxiliary tube 6 are thickly fitted to, comparatively dense heating coil is formed, is reduced
Gap out, reduces thermal loss, and certainly, heating element heater 9 can also be heating plate, or clamping hand hole pipe 2, auxiliary tube 6
Heater box etc..
Specifically, the axial length of the heating coil is not less than 12cm.As shown in figure 3, the heating coil is covered
Hand hole pipe 2, end cap 3 and auxiliary tube 6, also, the length of heating coil is unsuitable too small, it is to avoid and the thermal loss at two ends is significantly affected
To attachment weld 4, certainly, its length is also unsuitable long, causes energy waste.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, various letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The compound mode of energy is no longer separately illustrated.
Additionally, combination in any between a variety of embodiments of the present invention, can also be carried out, as long as which is without prejudice to this
The thought of invention, which should equally be considered as content disclosed in this invention.
Claims (10)
1. between the hand hole pipe and end cap of a kind of pipeline attachment weld heat treatment method, the hand hole pipe (2) is connected to the pipe
The end wall of the periphery wall and/or cecum in road (1), the free end of the hand hole pipe (2) is with the end cap (3) by attachment weld (4)
It is welded to connect, it is characterised in that the heat treatment method is comprised the following steps：
S1, connection auxiliary tube (6) on the outer face of the end cap (3)；
S2, around the hand hole pipe (2), the end cap (3) and the auxiliary tube (6) periphery arrange heating element heater (9)；
S3, the startup heating element heater (9) carry out heat treatment to the attachment weld (4).
2. heat treatment method according to claim 1, it is characterised in that the heating element heater (9) around being formed plus
In thermal region, the attachment weld (4) is along the central area for being axially located the heating region of the hand hole pipe (2).
3. heat treatment method according to claim 1, it is characterised in that the auxiliary tube (6) by with the hand hole pipe (2)
Identical material is made.
4. heat treatment method according to claim 1, it is characterised in that the external diameter and pipe thickness of the auxiliary tube (6)
It is identical with the hand hole pipe (2).
5. heat treatment method according to claim 1, it is characterised in that the length of the auxiliary tube (6) is not less than described
The length sum of hand hole pipe (2) and the end cap (3).
6. heat treatment method according to claim 1, it is characterised in that the mouth of pipe of the free end of the auxiliary tube (6) is filled out
Filled with thermal-insulating sealing part (8), thermal convection current is formed with outside to prevent the auxiliary tube (6) internal.
7. heat treatment method according to claim 6, it is characterised in that the thermal-insulating sealing part (8) is heat-preservation cotton.
8. heat treatment method according to claim 1, it is characterised in that the auxiliary tube (6) is passed through with the end cap (3)
Circumferentially spaced multiple pads (7) are welded to connect.
9. heat treatment method according to claim 1, it is characterised in that the heating element heater (9) includes heating rope, in institute
State in step S2, the heating rope is wrapped in into the periphery shape of the hand hole pipe (2), the end cap (3) and the auxiliary tube (6)
Into heating coil.
10. heat treatment method according to claim 9, it is characterised in that the axial length of the heating coil is not less than
12cm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610911195.4A CN106544493B (en) | 2016-10-19 | 2016-10-19 | The heat treatment method of attachment weld between the hand hole pipe and end cap of pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610911195.4A CN106544493B (en) | 2016-10-19 | 2016-10-19 | The heat treatment method of attachment weld between the hand hole pipe and end cap of pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106544493A true CN106544493A (en) | 2017-03-29 |
| CN106544493B CN106544493B (en) | 2018-04-20 |
Family
ID=58369360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610911195.4A Active CN106544493B (en) | 2016-10-19 | 2016-10-19 | The heat treatment method of attachment weld between the hand hole pipe and end cap of pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106544493B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3746651B2 (en) * | 1999-11-26 | 2006-02-15 | 三菱重工業株式会社 | Method and apparatus for reducing welding residual stress |
| CN202717819U (en) * | 2012-07-19 | 2013-02-06 | 天津市金立钢管有限公司 | Online welding annealing device |
| US20150071702A1 (en) * | 2013-09-06 | 2015-03-12 | Hitachi, Ltd. | Structural body and production method for the same |
| CN104625509A (en) * | 2015-01-07 | 2015-05-20 | 中国神华能源股份有限公司 | Method for heating pipeline connecting fillet weld |
| CN205741133U (en) * | 2016-05-30 | 2016-11-30 | 吉林昊宇电气股份有限公司 | Header scene local heat treatmet device |
-
2016
- 2016-10-19 CN CN201610911195.4A patent/CN106544493B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3746651B2 (en) * | 1999-11-26 | 2006-02-15 | 三菱重工業株式会社 | Method and apparatus for reducing welding residual stress |
| CN202717819U (en) * | 2012-07-19 | 2013-02-06 | 天津市金立钢管有限公司 | Online welding annealing device |
| US20150071702A1 (en) * | 2013-09-06 | 2015-03-12 | Hitachi, Ltd. | Structural body and production method for the same |
| CN104625509A (en) * | 2015-01-07 | 2015-05-20 | 中国神华能源股份有限公司 | Method for heating pipeline connecting fillet weld |
| CN205741133U (en) * | 2016-05-30 | 2016-11-30 | 吉林昊宇电气股份有限公司 | Header scene local heat treatmet device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106544493B (en) | 2018-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103557514B (en) | Box type high-voltage heater | |
| US9546798B2 (en) | Combined gas-water tube hybrid heat exchanger | |
| CN108866314A (en) | A method of guaranteeing that major diameter thick-walled pipe weld seam is heat-treated uniformity | |
| CN102906526B (en) | Flue gas air preheater, and a method for installation, as well as air pipe component for flue gas air preheater | |
| JP2926188B2 (en) | Connectors used for uncooled tubes and tubes to be cooled | |
| CN107598332B (en) | Novel CB2 heat-resistant steel medium-large diameter pipeline welding and heat treatment process | |
| CN207176027U (en) | Heat treatment mechanism after a kind of site welding of thermal power plant's header pipe angle seam | |
| JP6132084B2 (en) | Method for providing stress reduction in an assembled tube wall of a steam generator | |
| CN106544493B (en) | The heat treatment method of attachment weld between the hand hole pipe and end cap of pipeline | |
| CN104634139A (en) | Steam-water heat exchange sleeve | |
| JP6150380B2 (en) | HEAT EXCHANGER AND HEAT EXCHANGER MANUFACTURING METHOD | |
| CN105135917B (en) | A kind of shell side is from cooling protection movable tube sheets heat exchanger | |
| JPS5941110B2 (en) | Heat exchanger with double tube members | |
| CN203571709U (en) | Header type high-pressure heater | |
| CN208074928U (en) | The header of 630 DEG C of steam parameter station boilers | |
| CN207672081U (en) | 9%~12%Cr martensite heat-resistant steel major diameter posted sides pipeline argon filling heating and thermal insulation toolings | |
| CN110345467A (en) | A kind of desuperheater internal cover drum supporting device and installation method | |
| CN210506420U (en) | Oxygen rifle water-cooling protector | |
| CN108627025A (en) | A kind of inlet tube structure of condensate water pot | |
| CN206112893U (en) | 620 collection case of DEG C steam condition ultra supercritical unit boiler | |
| CN205956633U (en) | High temperature resistant rectangle expansion joint | |
| CN206410366U (en) | A kind of anti-liquid hammer finned heat exchanger with damping element | |
| CN109514051A (en) | A kind of welding method of pipeline | |
| CN203349253U (en) | Integral type water wall tube with transition section | |
| CN205484128U (en) | Collection case pipe box structure of detecting a flaw |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee after: China Shenhua Energy Co.,Ltd. Patentee after: SHENHUA FUJIAN ENERGY Co.,Ltd. Patentee after: Guoneng Shenfu (Jinjiang) Thermal Power Co.,Ltd. Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee before: China Shenhua Energy Co.,Ltd. Patentee before: SHENHUA FUJIAN ENERGY Co.,Ltd. Patentee before: FUJIAN JINJIANG COGENERATION Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |