CN104209637A - Welding method of high-temperature and high-pressure corrugated pipe cutoff valve - Google Patents
Welding method of high-temperature and high-pressure corrugated pipe cutoff valve Download PDFInfo
- Publication number
- CN104209637A CN104209637A CN201410369161.8A CN201410369161A CN104209637A CN 104209637 A CN104209637 A CN 104209637A CN 201410369161 A CN201410369161 A CN 201410369161A CN 104209637 A CN104209637 A CN 104209637A
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- China
- Prior art keywords
- welding
- valve
- road
- bellows
- corrugated pipe
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
Abstract
The invention aims at providing a welding method of a high-temperature and high-pressure corrugated pipe cutoff valve. The method adopts Ar (argon) double shielded welding, matching of a welding flux and a base metal, optimum combination of welding current, welding speed and welding time as well as diameter of a tungusten electrode, diameter of a spray nozzle and diameter of the welding flux, and an Ar protecting flow and control procedure. The high-temperature and high-pressure corrugated pipe cutoff valve structurally consists of a metal corrugated pipe, a valve rod or a valve core and a flange, and the valve with pressurizing shielded sealing, zero leakage and high reliability is realized by welding. The high-temperature and high-pressure corrugated pipe cutoff valve has the advantages that the metal corrugated pipe is pressure-proof and elastic, is formed by overlapping a plurality of precision thin-wall seamless pipes, and needs to be welded and sealed with the valve rod or the valve core and the flange, so the wall is thin, multiple layers are arranged, the size is small, the welding surface is narrow, the stress is large, the anti-fatigue strength is high, and the like; the welding method directly affects the quality of a welding seam and the anti-fatigue property of the metal corrugated pipe, and is closely related to the service life and reliability of the valve.
Description
Technical field
The present invention relates to design and the manufacture of valve, be widely used in poisonous, the keying and the control device that have radioactivity or the hazardous medium such as inflammable and explosive in industrial pipeline and other pipeline.
Background technology
The structure of HTHP bellows stop valve is with metal bellows and valve rod or spool and flange, realizes the valve of the spacious sealing of pressurized screen, 0 leakage, high reliability by welding.Because metal bellows should withstand voltagely have elasticity again, and by overlapping composition of precise thin-wall seamless pipe of multilayer number, need to carry out welded seal with valve rod or spool and flange and have that wall is thin, the number of plies is many, volume is little, the face of weld is narrow, stressed large, endurance life high, its technology difficulty is large; Flange and valve gap welding in addition, valve gap and valve body welding, because welding temperature is high, heat conduction is fast, add that welding position and metal bellows weld seam approach, easily cause the selective oxidation of metal bellows weld seam and produce trickle oxide, thereby affect the fatigue resistance of weld seam.So welding method directly affects the quality of weld seam and the fatigue performance of metal bellows, in close relations with the life and reliability energy of valve.
Summary of the invention
The object of the present invention is to provide a kind of welding method of HTHP bellows stop valve; adopt the weldering of argon gas duplicate protection; scolder should mate with base material, the best of breed of welding current and speed of welding and time and tungsten electrode diameter, nozzle diameter and scolder diameter and Ar gas protection flow and control program.
Technical scheme of the present invention is:
1, a kind of welding method of HTHP bellows stop valve, formed by direct-flow argon-arc welder, automatic welding machine for circular seam, Ar gas bomb, control valve, Pressure gauge, glass rotameter, flexible rubber hose, solenoid directional control valve, pipe joint, scolder etc., it is characterized in that: direct-flow argon-arc welder and automatic welding machine for circular seam connect, on Ar gas bomb, install control valve, Pressure gauge and glass rotameter and flexible rubber hose; Flexible rubber hose is divided into A, B two-way, and A road is that Ar protection tracheae directly accesses direct-flow argon-arc welder; B road is that back-protective tracheae accesses another control valve and glass rotameter; be linked into welded part with flexible rubber hose by pipe joint again; ensure that back of weld has sufficient Ar protection; a solenoid directional control valve is installed in flexible rubber hose centre position; while opening, cutting off discharge-channel makes pipeline unimpeded; while closing, cut off Ar passage and make back-protective region discharge-channel unimpeded, controlled by floor push.Weld by following program:
First welded metal bellow, its one end coordinates with valve rod or spool, the other end coordinate, align with flange fixing after, welded metal bellow and valve rod or spool weld seam and metal bellows and seam flange respectively, forms bellows component; Next is welding seat and weld seam flange, and bellows component qualified above-mentioned welding is coordinated with valve seat, after the outer step of its flange and the interior step of valve seat port are adjacent to, welds; Last welding seat and valve body weld seam, be threaded into valve body the above valve seat having welded and weld after fastening.
2, welding method operates by following program:
(1) by welded part by after ultrasonic cleaning, drying, then clean, blow open with acetone, ensure surface clean.
(2) B road back-protective gas flexible rubber hose is connected on welded part by pipe joint; clamping is on the positioner of automatic welding machine for circular seam; align, clamp and adjust suitable soldering angle; the nozzle and the tungsten electrode that have changed the outfit on welding gun; welding gun is rack-mount, adjust soldering angle and position.
(3) select the nozzle that diameter is 8mm, the welding of bellows component is 1.6mm with tungsten electrode diameter, and all the other welding are 2mm with tungsten electrode diameter, and scolder diameter is 2mm, and Ar quality is 99.96%.
(4) adjust electric current, voltage, speed of welding and argon flow amount parameter: bellows component adopts self-dissolving weldering; parameter is adjusted into respectively: electric current 30A; speed of welding 50cm/min; Ar quality is 99.96%; A road Ar shielding gas flow amount 10L/min left and right, B road Ar back-protective throughput 5L/min left and right.All the other adopt scolder welding, and parameter is adjusted into respectively: electric current 80-90A, and voltage 10-19V, speed of welding 10-15cm/min, A road Ar shielding gas flow amount is 8-13L/min, B road Ar back-protective throughput is 5-10L/min.
(5) wear protective face mask and start welding; when welding; first a pin opens the floor push of B road back-protective tracheae solenoid directional control valve; allow Ar enter behind back-protective region; another pin is opened the floor push of automatic welding machine for circular seam again and is implemented welding; bellows component adopts automatic welding; all the other adopt manual welding; in the time having approached front 2-5 second, close solenoid directional control valve; cut off B road tracheae air supply channel; make the Ar in back-protective region lead to atmosphere and fully discharge after interior pressure, complete girth welding.
Advantage of the present invention and beneficial effect are:
1, weld seam density high, fuse, flawless, bubble, smooth surface, sealing property is reliable.
2, the weld seam front and back during due to welding has Ar to keep, and has effectively prevented that conduction of heat from may cause the trickle oxide in part of weld seam to produce, and ensured quality and the fatigue resistance of weld seam.
3, elastic fatigue intensity and the service life of bellows have been improved.
Brief description of the drawings
Fig. 1 is welding position and the structure chart of bellows stop valve external-compression type.
Fig. 2 is welding position and the structure chart of bellows stop valve inner pressed.
Fig. 3 is bellows component Welding Structure figure.
Fig. 4 is the enlarged drawing of (A) in Fig. 3.
Fig. 5 is 100 times of metallographs of connector (12) and bellows (4) seam organization.
Fig. 6 is 100 times of metallographs of connector (12) and flange (5) seam organization.
Fig. 7 is 100 times of metallographs of bellows and seam flange (8) tissue.
In figure: 1, valve body 2, valve rod or spool 3, valve seat 4, metal bellows 5, flange 6, valve seat and valve body weld seam 7, metal bellows and valve rod or spool weld seam 8, metal bellows and seam flange 9, valve seat and seam flange 10, bellows component 11, connector 12, connector and seam flange 13, connector and valve rod or spool weld seam 14, connector and metal bellows weld seam
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
1, a kind of welding method of HTHP bellows stop valve, formed by direct-flow argon-arc welder, automatic welding machine for circular seam, Ar gas bomb, control valve, Pressure gauge, glass rotameter, flexible rubber hose, solenoid directional control valve, pipe joint, scolder etc., it is characterized in that: direct-flow argon-arc welder and automatic welding machine for circular seam connect, on Ar gas bomb, install control valve, Pressure gauge and glass rotameter and flexible rubber hose; Flexible rubber hose is divided into A, B two-way, and A road is that Ar protection tracheae directly accesses direct-flow argon-arc welder; B road is that back-protective tracheae accesses another control valve and glass rotameter; be linked into welded part with flexible rubber hose by pipe joint again; ensure that back of weld has sufficient Ar protection; a solenoid directional control valve is installed in flexible rubber hose centre position; while opening, cutting off discharge-channel makes pipeline unimpeded; while closing, cut off Ar passage and make back-protective region discharge-channel unimpeded, controlled by floor push.Weld by following program:
First welded metal bellow (4), its one end coordinates with valve rod or spool (2), the other end and flange (5) coordinate, align fixing after, welded metal bellow and valve rod or spool weld seam (7) and metal bellows and seam flange (8) respectively, forms bellows component (10); Next is welding seat and weld seam flange (9), and bellows component qualified above-mentioned welding (10) is coordinated with valve seat (3), after the interior step of the outer step of its flange (5) and valve seat (3) port is adjacent to, welds; Last welding seat and valve body weld seam (6), be threaded into valve body (1) the above valve seat (3) having welded and weld after fastening.
2, welding method operates by following program:
(1) by welded part by after ultrasonic cleaning, drying, then clean, dry up with acetone, ensure surface clean.
(2) B road back-protective gas flexible rubber hose is connected on welded part by pipe joint; clamping is on the positioner of automatic welding machine for circular seam; align, clamp and adjust suitable soldering angle; the nozzle and the tungsten electrode that have changed the outfit on welding gun; welding gun is rack-mount, adjust soldering angle and position.
(3) select the nozzle that diameter is 8mm, the welding of bellows component (10) is 1.6mm with tungsten electrode diameter, and all the other welding are 2mm with tungsten electrode diameter, and scolder diameter is 2mm, and Ar quality is 99.96%.
(4) adjust electric current, voltage, speed of welding and argon flow amount parameter: bellows component (10) adopts self-dissolving weldering; parameter is adjusted into respectively: electric current 30A; speed of welding 50cm/min, A road Ar shielding gas flow amount 10L/min left and right, B road Ar back-protective throughput 5L/min left and right.All the other adopt scolder welding, and parameter is adjusted into respectively: electric current 80-90A, and voltage 10-19V, speed of welding 10-15cm/min, A road Ar shielding gas flow amount is 8-13L/min, B road Ar back-protective throughput is 5-10L/min.
(5) wear protective face mask and start welding; when welding; first a pin opens the floor push of B road back-protective tracheae solenoid directional control valve; allow Ar enter behind back-protective region; another pin is opened the floor push of automatic welding machine for circular seam again and is implemented welding; bellows component (10) adopts automatic welding; all the other adopt manual welding; in the time having approached front 2-5 second, close solenoid directional control valve; cut off B road tracheae air supply channel; make the Ar in back-protective region lead to atmosphere and fully discharge after interior pressure, complete girth welding.
Claims (7)
1. the welding method of a HTHP bellows stop valve, formed by direct-flow argon-arc welder, automatic welding machine for circular seam, Ar gas bomb, control valve, Pressure gauge, glass rotameter, flexible rubber hose, solenoid directional control valve, pipe joint, scolder etc., it is characterized in that: direct-flow argon-arc welder and automatic welding machine for circular seam connect, on Ar gas bomb, install control valve, Pressure gauge and glass rotameter and flexible rubber hose; Flexible rubber hose is divided into A, B two-way, and A road is that Ar protection tracheae directly accesses direct-flow argon-arc welder; B road is that back-protective tracheae accesses another control valve and glass rotameter; be linked into welded part with flexible rubber hose by pipe joint again; ensure that back of weld has sufficient Ar protection; a solenoid directional control valve is installed in flexible rubber hose centre position; while opening, cutting off discharge-channel makes pipeline unimpeded; while closing, cut off Ar passage and make back-protective region discharge-channel unimpeded, controlled by floor push.
2. according to the welding method of a kind of HTHP bellows stop valve described in claim 1, it is characterized in that: first welded metal bellow (4), its one end coordinates with valve rod or spool (2), the other end and flange (5) coordinate, align fixing after, welded metal bellow and valve rod or spool weld seam (7) and metal bellows and seam flange (8) respectively, composition bellows component (10); Next is welding seat and weld seam flange (9), and bellows component qualified above-mentioned welding (10) is coordinated with valve seat (3), after the interior step of the outer step of its flange (5) and valve seat (3) port is adjacent to, welds; Last welding seat and valve body weld seam (6), be threaded into valve body (1) the above valve seat (3) having welded and weld after fastening.
3. according to the welding method of a kind of HTHP bellows stop valve described in claim 2, it is characterized in that: welded part, by after ultrasonic cleaning, drying, then is cleaned, dried up with acetone, ensure surface clean.
4. according to the welding method of a kind of HTHP bellows stop valve described in claim 2, it is characterized in that: the nozzle that apolegamy diameter is 8mm, the welding of bellows component (10) is 1.6mm with tungsten electrode diameter, all the other welding are 2mm with tungsten electrode diameter, scolder diameter is 2mm, and Ar quality is 99.96%.
5. according to the welding method of a kind of HTHP bellows stop valve described in claim 2; it is characterized in that: adjust electric current, voltage, speed of welding and argon flow amount parameter: bellows component (10) adopts self-dissolving weldering; parameter is adjusted into respectively: electric current 30A; speed of welding 50cm/min; A road Ar shielding gas flow amount 10L/min left and right, B road Ar back-protective throughput 5L/min left and right.
6. according to the welding method of a kind of HTHP bellows stop valve described in claim 2; it is characterized in that: all the other adopt scolder welding; parameter is adjusted into respectively: electric current 80-90A; voltage 10-19V; speed of welding 10-15cm/min; A road Ar shielding gas flow amount is 8-13L/min, and B road Ar back-protective throughput is 5-10L/min.
7. according to the welding method of a kind of HTHP bellows stop valve described in claim 2, it is characterized in that: when welding, first a pin opens the floor push of B road back-protective tracheae solenoid directional control valve, allow Ar enter behind back-protective region, another pin is opened the floor push of automatic welding machine for circular seam again and is implemented welding, bellows component (10) adopts automatic welding, all the other adopt manual welding, in the time having approached front 2-5 second, close solenoid directional control valve, cut off B road tracheae air supply channel, making the Ar in back-protective region lead to atmosphere fully discharges after interior pressure, complete girth welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410369161.8A CN104209637B (en) | 2014-07-31 | 2014-07-31 | The welding method of High Temperature High Pressure bellows stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410369161.8A CN104209637B (en) | 2014-07-31 | 2014-07-31 | The welding method of High Temperature High Pressure bellows stop valve |
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| Publication Number | Publication Date |
|---|---|
| CN104209637A true CN104209637A (en) | 2014-12-17 |
| CN104209637B CN104209637B (en) | 2017-03-15 |
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| CN201410369161.8A Active CN104209637B (en) | 2014-07-31 | 2014-07-31 | The welding method of High Temperature High Pressure bellows stop valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106239003A (en) * | 2016-08-30 | 2016-12-21 | 苏州纽威阀门股份有限公司 | A kind of valve block lap welding connects positioning tool |
| CN106838338A (en) * | 2017-03-09 | 2017-06-13 | 中国科学院合肥物质科学研究院 | A kind of low temperature regulating valve and its welding procedure |
| CN113523636A (en) * | 2021-08-09 | 2021-10-22 | 江苏神通阀门股份有限公司 | Valve welding method |
| CN114833480A (en) * | 2021-11-02 | 2022-08-02 | 阳江核电有限公司 | On-line automatic welding method and system for valve sealing lip welding seam |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3787023A (en) * | 1971-08-05 | 1974-01-22 | Nupro Co | Bellows valve |
| CN2249339Y (en) * | 1995-09-11 | 1997-03-12 | 上海化纺控制技术公司 | Corrugated pipe sealing device for valve |
| US5826336A (en) * | 1994-08-23 | 1998-10-27 | Johnson Service Company | Process for the production of series-produced valves used in heating, ventilating and air-conditioning systems |
| CN101590560A (en) * | 2008-10-20 | 2009-12-02 | 杜文涛 | Novel argon arc welding machine and gas supply protecting device thereof |
| CN101850458A (en) * | 2009-03-31 | 2010-10-06 | 株式会社三社电机制作所 | Protection gas controlling device and welding device |
| CN102384310A (en) * | 2011-10-27 | 2012-03-21 | 江苏晨东机械制造有限公司 | Bellows assembly of SF6 valve and manufacturing method thereof |
| CN103128428A (en) * | 2012-11-26 | 2013-06-05 | 高密胜鑫交通工程有限公司 | Circular seam automatic welding machine |
| CN103244696A (en) * | 2013-05-17 | 2013-08-14 | 江苏星河阀门有限公司 | External-pressure type bellows globe valve with non-rotating valve rod |
-
2014
- 2014-07-31 CN CN201410369161.8A patent/CN104209637B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3787023A (en) * | 1971-08-05 | 1974-01-22 | Nupro Co | Bellows valve |
| US5826336A (en) * | 1994-08-23 | 1998-10-27 | Johnson Service Company | Process for the production of series-produced valves used in heating, ventilating and air-conditioning systems |
| CN2249339Y (en) * | 1995-09-11 | 1997-03-12 | 上海化纺控制技术公司 | Corrugated pipe sealing device for valve |
| CN101590560A (en) * | 2008-10-20 | 2009-12-02 | 杜文涛 | Novel argon arc welding machine and gas supply protecting device thereof |
| CN101850458A (en) * | 2009-03-31 | 2010-10-06 | 株式会社三社电机制作所 | Protection gas controlling device and welding device |
| CN102384310A (en) * | 2011-10-27 | 2012-03-21 | 江苏晨东机械制造有限公司 | Bellows assembly of SF6 valve and manufacturing method thereof |
| CN103128428A (en) * | 2012-11-26 | 2013-06-05 | 高密胜鑫交通工程有限公司 | Circular seam automatic welding machine |
| CN103244696A (en) * | 2013-05-17 | 2013-08-14 | 江苏星河阀门有限公司 | External-pressure type bellows globe valve with non-rotating valve rod |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106239003A (en) * | 2016-08-30 | 2016-12-21 | 苏州纽威阀门股份有限公司 | A kind of valve block lap welding connects positioning tool |
| CN106239003B (en) * | 2016-08-30 | 2017-11-14 | 苏州纽威阀门股份有限公司 | A kind of valve block lap welding connects positioning tool |
| CN106838338A (en) * | 2017-03-09 | 2017-06-13 | 中国科学院合肥物质科学研究院 | A kind of low temperature regulating valve and its welding procedure |
| CN106838338B (en) * | 2017-03-09 | 2019-01-15 | 中国科学院合肥物质科学研究院 | A kind of welding procedure of low temperature regulating valve |
| CN113523636A (en) * | 2021-08-09 | 2021-10-22 | 江苏神通阀门股份有限公司 | Valve welding method |
| CN114833480A (en) * | 2021-11-02 | 2022-08-02 | 阳江核电有限公司 | On-line automatic welding method and system for valve sealing lip welding seam |
| CN114833480B (en) * | 2021-11-02 | 2023-09-19 | 阳江核电有限公司 | Online automatic welding method and system for valve sealing lip weld joint |
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| Publication number | Publication date |
|---|---|
| CN104209637B (en) | 2017-03-15 |
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