CN110238489A - A kind of production of high-temperature heat-exchanging and welding procedure - Google Patents

A kind of production of high-temperature heat-exchanging and welding procedure Download PDF

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Publication number
CN110238489A
CN110238489A CN201910511565.9A CN201910511565A CN110238489A CN 110238489 A CN110238489 A CN 110238489A CN 201910511565 A CN201910511565 A CN 201910511565A CN 110238489 A CN110238489 A CN 110238489A
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China
Prior art keywords
tube
welding
exchanging
temperature heat
production
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CN201910511565.9A
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Chinese (zh)
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CN110238489B (en
Inventor
梁兆鹏
邹伟
姚传滨
王景才
王凯威
于子健
李栋栋
孟杰
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Luxi Industrial Equipment Co Ltd
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Luxi Industrial Equipment Co Ltd
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Publication of CN110238489A publication Critical patent/CN110238489A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/16Arc welding or cutting making use of shielding gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/32Accessories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/04Tubular or hollow articles
    • B23K2101/14Heat exchangers

Abstract

The present invention relates to a kind of production of high-temperature heat-exchanging and welding procedure, a kind of using temperature is more than 900 DEG C, the heat exchanger especially with central support tube makes and welding procedure.(1) exchange heat pipe pore groove is processed, and forms single U-shaped groove;(2) pore is cleared up;(3) 1~1.5mm of heat exchanger tube protruded tube plate end face;(4) paste swollen without bevel part, 3~3.2mm of front and back is not swollen;(5) it after expanded joint pass the test, is welded.It provides a kind of novel heat exchange pipe and tube sheet type of attachment improves welding efficiency and quality while guaranteeing weld seam elevated temperature strength.Central tube and tube bank assembling sequence are optimized, realizes all butt weld ray non-destructive testings.

Description

A kind of production of high-temperature heat-exchanging and welding procedure
Technical field
The present invention relates to use temperature to be more than 900 DEG C, heat exchanger production and welding procedure especially with central support tube.
Background technique
High-temperature heat-exchanging, to guarantee to restrain the intensity of upper weld seam, the especially welding of exchanger tubes and tubesheets is general to require to adopt With complete penetraction and fusion in welding structure, when mother metal thickness is larger, groove depth will be very big;It is limited to heat exchanger tube pitch of holes, bevel angle It is smaller;Therefore high-temperature heat-exchanging exchanger tubes and tubesheets attachment weld groove is often not only deep but also narrow, and welding difficulty is big, welding quality It adversely affects.
Such as: patent CN105014336A discloses a kind of manufacturing process that double tube plate heat exchanger is novel, including following step Rapid: (1), the processing of inside and outside tube sheet controls aperture and roughness, do not allowed screw thread occur using numerical control drilling machine bottoming hole, drilling Shape and longitudinal scratch;The big 0.1mm of outer tube plate aperture ratio inner tube panel aperture;B, processing internal tube plate is carried out using dedicated hole slot boring cutter Swollen slot;(2), baffle plate is processed, and the processing of baffle plate is fixed to one using quadrant as group, by the straight panel of the baffle plate in a quadrant It rises, and carries out positive label, two end chamfer of baffle hole removes flash removed;(3), inside and outside tube sheet is pre-assembled;(4), tube bank assembling; (5), the Hydraulic expansion-jointing of internal tube plate;(6), outer tube plate is welded and is pasted swollen;(7), pressure testing.The technique ensure that the pipe of heat exchanger 100% is qualified after plate and heat exchanger tube expanded joint, improves the safety of heat exchanger.
High-temperature heat-exchanging, tube bank, shell weld seam generally require docking, and the tube bank with central tube, there are length directions Upper same position has the case where diameter difference, inside and outside twice weld seam;Again because of the presence of heat exchanger tube, tube bank, cylinder boxing seam welding And ray non-destructive testing has difficulties.
Summary of the invention
In view of the deficiency of the prior art, a purpose of the invention is to provide a kind of exchanger tubes and tubesheets connection side Formula can guarantee the weld strength under high temperature, and can reduce welding workload and difficulty to greatest extent, improve welding efficiency and Quality.
Second purpose of the invention is to provide a kind of high-temperature heat-exchanging tube bank assembling with central tube, welding procedure, success Ground solves the problems, such as that inner and outer welding is inconvenient to weld and carry out non-destructive testing.
To realize the above-mentioned technical purpose, The technical solution adopted by the invention is as follows:
A kind of production of high-temperature heat-exchanging and welding procedure, comprising:
(1) exchange heat pipe pore groove is processed, and forms single U-shaped groove;
(2) pore is cleared up;
(3) 1~1.5mm of heat exchanger tube protruded tube plate end face;
(4) paste swollen without bevel part, 3~3.2mm of front and back is not swollen;
(5) it after expanded joint pass the test, is welded.
The exchanger tubes and tubesheets of the application are using a kind of new jointing, by traditional complete penetraction and fusion in welding construction joint, optimization Heat exchanger tube welding difficulty is reduced while weld strength under guaranteeing high temperature for half welding, half expanded joint.
Special restriction is not made in the application to the specific method of welding, as long as can guarantee to reach corresponding weld seam strong Degree.Therefore, in some embodiments, in the welding process, bottoming uses argon arc, and filling, capping select welding rod arc Weldering, improves welding efficiency and welding quality.
The weld metal amount of single U-shaped groove is minimum, and the deformation that weldment generates is small, base metals proportion in weld metal Also small;In order to guarantee effective welding to workpiece, in some embodiments, the list U-shaped groove depth is the 1/2 of tube plate thickness ~5/8.
Bevel angle is an important welding process factor for influencing appearance of weld, weld dilution rate, fusion area shape, because This, in some embodiments, the groove root arc of falling R, arc range is in R3~R5mm;Bevel angle is at 10~15 °, effectively Improve welding quality in ground.
Tube sheet is that the hole equally more somewhat larger than tube outer diameter is drilled out in circular steel plate, is that fixing pipe is played in heat exchanger Son and sealing medium effect round steel, in some embodiments, the tube sheet with a thickness of 20~50mm, to guarantee heat exchanger With good assembling and service performance.
Cleaning for pore, the specification based on pore select corresponding cleaning equipment, and the application does not make this Special restriction, in some embodiments, cleaning pore use specification for the column sized flap wheel of 320 mesh, not only cleaning efficiency height, Do not burn workpiece and also it is highly-safe, continuous operation is simple.
Pasting swollen is mainly the slight expanded joint for eliminating gap between heat exchanger tube and pore, in order to guarantee convenient for construction, therefore, In some embodiments, the patch is swollen uses hydraulic tube expander, is applied to using the high-pressure and hydraulic pressure that hydraulic casing roller provides The radial pressure that high pressure resistant elastic rubbery body generates by pipe expanded joint on tube sheet, thus the expanded joint between realizing tube-to-tube sheet connection.
In order to improve the welding efficiency of heat exchanger tube, the application is optimized for argon arc and welding rod is welded by traditional argon arc welding, And it is adjusted to downhand position welding, therefore, in some embodiments, argon arc welding wire specification isWeld width is in 3mm It is used when followingWelding rod, welding efficiency significantly improve.
The present invention also provides the new type high temperature heat exchangers of any above-mentioned method preparation.
The present invention also provides above-mentioned high-temperature heat-exchangings in the industrial productions such as metallurgy, chemistry, ceramics, building materials and light industry Application.
The beneficial effects of the present invention are:
(1) traditional complete penetraction and fusion in welding construction joint is optimized for half using a kind of new jointing by exchanger tubes and tubesheets Welding, half expanded joint reduce heat exchanger tube welding difficulty while weld strength under guaranteeing high temperature.
(2) heat exchanger tube welds, and by traditional argon arc welding, is optimized for argon arc and welding rod welds, and be adjusted to downhand position Welding, welding efficiency improve.
(3) the tube bank production order with central tube is optimized, realizes all butt welds using ray non-destructive testing, it is ensured that Welding quality.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is exchanger tubes and tubesheets jointing schematic diagram of the invention;
In figure: 1-- 2-heat exchanger tube of tube sheet.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another It indicates, all technical and scientific terms used in this application have logical with the application person of an ordinary skill in the technical field The identical meanings understood.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, for current high-temperature heat-exchanging, tube bank, shell weld seam generally require docking, Tube bank with central tube, depositing same position in the longitudinal direction has the case where diameter difference, inside and outside twice weld seam;Again because of heat exchange The problem of presence of pipe, tube bank, cylinder boxing seam welding and ray non-destructive testing have difficulties.Therefore, the present invention proposes one kind The production of new type high temperature heat exchanger and welding procedure.
Exchanger tubes and tubesheets Joining Technology, includes the following steps:
(1) heat exchanger tube pore groove, single U-shaped groove are processed, groove depth is the half of tube plate thickness;
(2) pore is cleared up, must not jagged, greasy dirt, rusty stain etc., groove and pore inner wall must be bright and clean;
(3) 1~1.5mm of heat exchanger tube protruded tube plate end face;
(4) paste swollen without bevel part, front and back 3mm is not swollen;
(5) air seal test is carried out after expanded joint, is qualification with ne-leakage;
(6) it after expanded joint pass the test, is welded.Bottoming uses argon arc, and filling, capping select welding electrode arc welding.
Preferably, tube sheet with a thickness of 20~50mm.
Preferably, groove uses numerically-controlled machine tool in step (1), it is ensured that retaining wall on slope precision.
Preferably, the groove root arc of falling R in step (1), arc range is in R3~R5mm;Bevel angle is at 10~15 °.
Preferably, cleaning nozzle uses specification for the column sized flap wheel of 320 mesh in step (2).
Preferably, hydraulic tube expander is used in step (4).
Preferably, argon arc welding wire specification is in step (6)Weld width is used in 3mm or lessWeldering Item.
Preferably, it is welded in step (6) using downhand position.
2, heat exchanger tube, central tube erecting and welding process:
(7) one piece of tube sheet and cylinder group are soldered into.
(8) installation center pipe.
(9) center tube to tube sheet welding, postwelding carry out lossless inspection to tube sheet and cylinder, tube sheet and central tube attachment weld It surveys.
(10) after detection is qualified, several heat exchanger tubes is uniformly installed, as positioning pipe, second piece of tube sheet is installed.
(11) second piece of tube sheet and shell attachment weld are first welded, then welds second piece of tube sheet and central tube attachment weld.
(12) positioning heat exchanger tube is extracted out one third outward from first piece of tube sheet end.
(13) it to second piece of tube sheet and shell attachment weld, then welds second piece of tube sheet and is penetrated with central tube attachment weld Line non-destructive testing.
(14) heat exchanger tube is installed to be welded.
Preferably, second piece of tube sheet and shell attachment weld use internal groove in step (11), and tube sheet is connect with central tube Weld seam uses outer groove.
Preferably, tube sheet and central tube welding use argon arc bottoming in step (11).
Preferably, ray non-destructive testing is detected a flaw using source of putting in step (13).
Core of the invention is to use a kind of new jointing, real using new tube bank assembling production process Show all butt weld ray non-destructive testings, while ensure that the concentricity of two tube sheets and central tube.
In order to enable those skilled in the art can clearly understand technical solution of the present invention, below with reference to tool The embodiment of body and the technical solution that the present invention will be described in detail.
Embodiment 1
A kind of new type high temperature heat exchanger manufacture craft, comprising:
(1) exchanger tubes and tubesheets type of attachment takes welding to stick on swollen form, and wherein throat depth is tube plate thickness Half.
(2) exchanger tubes and tubesheets attachment weld uses U-shaped groove, and root R arc is having a size of arc range in R3~R5mm;Slope Bicker degree is at 10~15 °.
(3) exchanger tubes and tubesheets weld, and using argon arc and the weldering welding of welding rod group, and set welding using prosposition.
(4) it restrains assembling sequence: one piece of tube sheet and cylinder group is soldered into -- installation center pipe -- central tube and Tubesheet Welding Connect, postwelding carries out non-destructive testing tube sheet and cylinder, tube sheet and central tube attachment weld -- after detection is qualified, uniformly install several Heat exchanger tube installs second piece of tube sheet as positioning pipe -- and second piece of tube sheet and shell attachment weld are first welded, then welds second piece Tube sheet and central tube attachment weld -- extracting positioning heat exchanger tube out one third outward from first piece of tube sheet end -- manage second piece Plate and shell attachment weld, then weld second piece of tube sheet and the progress ray non-destructive testing of central tube attachment weld -- install heat exchanger tube It is welded.
Embodiment 2
A kind of new type high temperature heat exchanger manufacture craft, comprising:
(1) exchanger tubes and tubesheets type of attachment takes welding to stick on swollen form, and wherein throat depth is tube plate thickness Half.
(2) exchanger tubes and tubesheets attachment weld uses U-shaped groove, and root R arc is having a size of arc range in R3mm;Groove angle Degree is at 10 °.
(3) exchanger tubes and tubesheets weld, and using argon arc and the weldering welding of welding rod group, and set welding using prosposition.
(4) it restrains assembling sequence: one piece of tube sheet and cylinder group is soldered into -- installation center pipe -- central tube and Tubesheet Welding Connect, postwelding carries out non-destructive testing tube sheet and cylinder, tube sheet and central tube attachment weld -- after detection is qualified, uniformly install several Heat exchanger tube installs second piece of tube sheet as positioning pipe -- and second piece of tube sheet and shell attachment weld are first welded, then welds second piece Tube sheet and central tube attachment weld -- extracting positioning heat exchanger tube out one third outward from first piece of tube sheet end -- manage second piece Plate and shell attachment weld, then weld second piece of tube sheet and the progress ray non-destructive testing of central tube attachment weld -- install heat exchanger tube It is welded.
In the welding process, bottoming uses argon arc, and filling, capping select welding electrode arc welding, effectively improve welding Efficiency and welding quality.
Cleaning pore uses specification for the column sized flap wheel of 320 mesh, and not only cleaning efficiency is high, do not burn workpiece, Er Qiean Quan Xinggao, continuous operation are simple.
Embodiment 3
A kind of new type high temperature heat exchanger manufacture craft, comprising:
(1) exchanger tubes and tubesheets type of attachment takes welding to stick on swollen form, and wherein throat depth is tube plate thickness Half.
(2) exchanger tubes and tubesheets attachment weld uses U-shaped groove, and root R arc is having a size of arc range in R 5mm;Groove Angle is at 15 °.
(3) exchanger tubes and tubesheets weld, and using argon arc and the weldering welding of welding rod group, and set welding using prosposition.
(4) it restrains assembling sequence: one piece of tube sheet and cylinder group is soldered into -- installation center pipe -- central tube and Tubesheet Welding Connect, postwelding carries out non-destructive testing tube sheet and cylinder, tube sheet and central tube attachment weld -- after detection is qualified, uniformly install several Heat exchanger tube installs second piece of tube sheet as positioning pipe -- and second piece of tube sheet and shell attachment weld are first welded, then welds second piece Tube sheet and central tube attachment weld -- extracting positioning heat exchanger tube out one third outward from first piece of tube sheet end -- manage second piece Plate and shell attachment weld, then weld second piece of tube sheet and the progress ray non-destructive testing of central tube attachment weld -- install heat exchanger tube It is welded.
Tube sheet is that the hole equally more somewhat larger than tube outer diameter is drilled out in circular steel plate, is that fixing pipe is played in heat exchanger Son and sealing medium effect round steel, in some embodiments, the tube sheet with a thickness of 20~50mm, to guarantee heat exchanger With good assembling and service performance.
Embodiment 4
A kind of new type high temperature heat exchanger manufacture craft, comprising:
(1) exchanger tubes and tubesheets type of attachment takes welding to stick on swollen form, and wherein throat depth is tube plate thickness Half.
(2) exchanger tubes and tubesheets attachment weld uses U-shaped groove, and root R arc is having a size of arc range in R4mm;Groove angle Degree is at 12 °.
(3) exchanger tubes and tubesheets weld, and using argon arc and the weldering welding of welding rod group, and set welding using prosposition.
(4) it restrains assembling sequence: one piece of tube sheet and cylinder group is soldered into -- installation center pipe -- central tube and Tubesheet Welding Connect, postwelding carries out non-destructive testing tube sheet and cylinder, tube sheet and central tube attachment weld -- after detection is qualified, uniformly install several Heat exchanger tube installs second piece of tube sheet as positioning pipe -- and second piece of tube sheet and shell attachment weld are first welded, then welds second piece Tube sheet and central tube attachment weld -- extracting positioning heat exchanger tube out one third outward from first piece of tube sheet end -- manage second piece Plate and shell attachment weld, then weld second piece of tube sheet and the progress ray non-destructive testing of central tube attachment weld -- install heat exchanger tube It is welded.
Pasting swollen is mainly the slight expanded joint for eliminating gap between heat exchanger tube and pore, in order to guarantee convenient for construction, therefore, In some embodiments, the patch is swollen uses hydraulic tube expander, is applied to using the high-pressure and hydraulic pressure that hydraulic casing roller provides The radial pressure that high pressure resistant elastic rubbery body generates by pipe expanded joint on tube sheet, thus the expanded joint between realizing tube-to-tube sheet connection.
In order to improve the welding efficiency of heat exchanger tube, the application is optimized for argon arc and welding rod is welded by traditional argon arc welding, And it is adjusted to downhand position welding, therefore, in some embodiments, argon arc welding wire specification isWeld width is in 3mm It is used when followingWelding rod, welding efficiency significantly improve.
Finally it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not limited to this hair It is bright, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still It can modify to technical solution documented by previous embodiment, or part is equivalently replaced.It is all in this hair Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention Within.Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not to the scope of the present invention Limitation, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not required to Make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.

Claims (10)

1. a kind of high-temperature heat-exchanging production and welding procedure characterized by comprising
(1) exchange heat pipe pore groove is processed, and forms single U-shaped groove;
(2) pore is cleared up;
(3) 1~1.5mm of heat exchanger tube protruded tube plate end face;
(4) non-bevel part paste swollen, and 3~3.2mm of front and back is not swollen;
(5) it after expanded joint pass the test, is welded.
2. high-temperature heat-exchanging production as described in claim 1 and welding procedure, which is characterized in that in the welding process, beat Bottom uses argon arc, and filling, capping select welding electrode arc welding.
3. high-temperature heat-exchanging production as described in claim 1 and welding procedure, which is characterized in that the list U-shaped groove depth For the 1/2-5/8 of tube plate thickness.
4. high-temperature heat-exchanging production as described in claim 1 and welding procedure, which is characterized in that the groove root arc of falling R, Arc range is in R3~R5mm;Bevel angle is at 10~15 °.
5. high-temperature heat-exchanging as described in claim 1 production and welding procedure, which is characterized in that the tube sheet with a thickness of 20 ~50mm.
6. high-temperature heat-exchanging as described in claim 1 production and welding procedure, which is characterized in that cleaning pore use specification for The column sized flap wheel of 320 mesh.
7. high-temperature heat-exchanging production as described in claim 1 and welding procedure, which is characterized in that the patch is swollen to use Hydraulic Expansion Pipe device.
8. high-temperature heat-exchanging as described in claim 1 production and welding procedure, which is characterized in that argon arc welding wire specification isWeld width is used in 3mm or lessWelding rod.
9. the high-temperature heat-exchanging of the described in any item high-temperature heat-exchanging production of claim 1-8 and welding procedure preparation.
10. high-temperature heat-exchanging as claimed in claim 9 answering in the industrial productions such as metallurgy, chemistry, ceramics, building materials and light industry With.
CN201910511565.9A 2019-06-13 2019-06-13 Manufacturing and welding process of high-temperature heat exchanger Active CN110238489B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110595103A (en) * 2019-10-30 2019-12-20 远大空调有限公司 High-temperature generator tube plate structure for lithium bromide cold-warm water unit
CN110682024A (en) * 2019-09-29 2020-01-14 鲁西工业装备有限公司 Method for welding heat exchange tube and tube plate and application thereof
CN110595103B (en) * 2019-10-30 2021-08-31 远大空调有限公司 High-temperature generator tube plate structure for lithium bromide cold-warm water unit

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CN205156715U (en) * 2015-06-24 2016-04-13 江苏盛信重工有限公司 Double tubesheet structure of heat exchanger
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DE3346451A1 (en) * 1983-12-22 1985-07-04 Binzel Alexander Gmbh Co Kg Hose connection and a method for attaching a flexible hose to a connecting part
CN1695879A (en) * 2005-05-26 2005-11-16 渤海船舶重工有限责任公司 Assembly method of positioning chock for ensuring gap at root parts butt jointing tubes in use for welding
CN1935438A (en) * 2006-06-09 2007-03-28 浙江省火电建设公司 P92 steel welding process
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110682024A (en) * 2019-09-29 2020-01-14 鲁西工业装备有限公司 Method for welding heat exchange tube and tube plate and application thereof
CN110595103A (en) * 2019-10-30 2019-12-20 远大空调有限公司 High-temperature generator tube plate structure for lithium bromide cold-warm water unit
CN110595103B (en) * 2019-10-30 2021-08-31 远大空调有限公司 High-temperature generator tube plate structure for lithium bromide cold-warm water unit

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