CN101745721A - Welding method of damper plate and flow tube in Coriolis mass flowmeter - Google Patents
Welding method of damper plate and flow tube in Coriolis mass flowmeter Download PDFInfo
- Publication number
- CN101745721A CN101745721A CN200810204245A CN200810204245A CN101745721A CN 101745721 A CN101745721 A CN 101745721A CN 200810204245 A CN200810204245 A CN 200810204245A CN 200810204245 A CN200810204245 A CN 200810204245A CN 101745721 A CN101745721 A CN 101745721A
- Authority
- CN
- China
- Prior art keywords
- damping sheet
- damper plate
- flow tube
- flowtube
- welding
- 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.)
- Pending
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The invention relates to a welding method of a damper plate and a flow tube in a Coriolis mass flowmeter; the diameter of the flow tube is set as d, the tube wall thickness is delta which is more than or equal to 2mm, manual argon arc welding is carried out by the following steps: the thickness b of the damper plate is selected, b is equal to 4-5delta; a hole is arranged on the damper plate for leading the flow tube to penetrate through; a circular groove which has concentric circle with the hole is arranged on the damper plate; after the flow tube penetrates through the damper plate, the manual argon arc welding is carried out. The bore diameter d of the damper plate is equal to d (1+0.5 percent), the diameter of the inner ring of the circular groove is D+2delta, the diameter of the outer ring of the circular groove is D+5delta, and the depth of the circular groove is 1.5delta. the damper plate is thickened and the circular groove is arranged, so as to realize manual argon arc welding f the damper plate and the flow tube, a huge vacuum brazing furnace is omitted, even if the assembling clearance of the flow tube and the damper plate reaches 0.5mm, even wider clearance exists, welding can be carried out, secondary repair can be carried out to welding line defect, and the method is suitable for the mass flowmeter with more than 2mm of the flow tube wall.
Description
[technical field]
The present invention relates to the manufacture method of coriolis mass flowmeters, the welding method of damping sheet and flowtube in specifically a kind of coriolis mass flowmeters.
[background technology]
Coriolis mass flowmeters (abbreviation mass flowmenter) generally is made up of parts such as flowtube, damping sheet, detecting element, driving elements, since later 1970s comes out, now be widely adopted in industry-by-industries such as oil, chemical industry, food, medicine, the suitable conduit bore also is tending towards enlarging.What be indicated in report has: after the ELITE series mass flowmeter CMF400 (DN100) that Rosemount China Inc. produces put on market in 2003, the instrument data introduction of DN200 was arranged just in November, 2007; Germany E+H company just had the instrument of F series DN250 to show in 2003; The domestic instrucment and meter plant of navigating very much is in operation DN200 bore mass flowmenter in 2003, the instrument of grand operation DN150 bore in 2006 in the Dalian.
From the evolution of domestic and international mass flowmenter hole enlargement, the damping sheet of heavy caliber mass flowmenter and the solder technology between flowtube be the further hole enlargement of restriction one of key issue.The damping sheet of existing product all is to be processed by the thin steel plates of two or many, and two holes are arranged, and two flowtube are passed two holes of damping sheet, is welded into overall structure with the technology of vacuum brazing.And the above mass flowmenter of bore DN150, sensor bulk is big, and the large-scale vacuum soldering oven is difficult to preparation; Also have, the caliber of U type flowtube is big, pipe diameter as DN150, DN200, DN300 bore instrument is respectively φ 114, φ 140, φ 219, its ellipticity error is all ± 0.15～± 0.5, in the permissible variation of additional diameter, the fit-up gap of flowtube and damping sheet can both＞0.5mm, this situation can't be carried out vacuum brazing.Make the mass flowmenter of the above bore of DN150 now, on this procedure, adopt manual silver brazing to substitute vacuum brazing.
, the problem of manual silver brazing is also a lot, such as, the weld seam inequality adds that local heat can cause post welding distortion very big, and the super large structure is difficult to correct, and especially can discharge stress under long-term vibration operating mode, and then cause the work quality instability, can have a strong impact on the operating accuracy of instrument.
[summary of the invention]
Make this key technical problem of heavy caliber mass flowmenter in order to solve, the present invention proposes to thicken damping sheet, changes the method that connects with manual argon arc welding.
Technical scheme of the present invention is: the welding method of damping sheet and flowtube in a kind of coriolis mass flowmeters, and setting the flowtube caliber is d, and pipe thickness is δ, and δ 〉=2 millimeter is characterized in that imposing according to the following steps manual argon arc welding:
1) selected damping sheet thickness is b=4-5 δ;
2) offer the hole of passing for flowtube at damping sheet;
3) offer at damping sheet and become concentrically ringed annular groove with aforementioned apertures;
4) after being penetrated damping sheet, flowtube imposes manual argon arc welding.
Further, setting the damping sheet aperture is D, gets D=d (1+0.5%); The annular groove inner ring diameter is D+2 δ, and the annular groove race diameter is D+5 δ, and the annular groove degree of depth is 1.5 δ.
Characteristics of the present invention are thickening damping sheets and offer annular groove, make manual argon arc welding connect damping sheet and flowtube is achieved.Compared with the prior art, has many-sided advantage: adopt manual argon arc welding not only can exempt providing for oneself of super large vacuum brazing furnace, even if because the caliber of U type flowtube is big, make the fit-up gap of flowtube and damping sheet reach above-mentioned 0.5mm, the defect of above-mentioned vacuum brazing also can not take place, and the weldering crack of 0～0.5mm is the requirement in the argon arc welding standard, even bigger weldering crack also can be welded, the weld seam defect can be carried out the secondary repairing, and vacuum brazing generation defect can not be repaired.
[description of drawings]
Fig. 1 is the cutaway view of damping sheet among the present invention.
Fig. 2 is the vertical view of damping sheet among Fig. 1.
[specific embodiment]
Be further described below in conjunction with the embodiment of the invention and accompanying drawing thereof.
The present invention proposes to thicken damping sheet, changes the method that connects with manual argon arc welding, the welding of damping sheet and flowtube in the implementation quality flowmeter, setting the flowtube caliber is d, pipe thickness is δ, can adopt vacuum brazing to bore less than the mass flowmenter of DN80, and the present invention will solve is the problem of heavy caliber mass flowmenter, so desirable δ 〉=2 millimeter.
Consult accompanying drawing simultaneously, impose manual argon arc welding according to the following steps:
1) selected damping sheet thickness is b=4-5 δ;
2) offer the hole of passing for flowtube 1 at damping sheet;
3) offer at damping sheet and become concentrically ringed annular groove 2 with aforementioned apertures;
4) after being penetrated damping sheet, flowtube imposes manual argon arc welding.Setting the damping sheet aperture is D, gets D=d (1+0.5%); Annular groove 2 inner ring diameters are D
1=D+2 δ, annular groove 2 race diameters are D
2=D+5 δ, the annular groove degree of depth is t=1.5 δ.
Another effect of annular groove 2 is the elasticity that has improved the edge, hole, reduces rigidity, the possibility that this helps improving vibration life and reduces stress cracking.
Getting hole 1 diameter D=d (1+0.5%) is to consider base pipe manufacturer error so that assemble, and formed fit-up gap adopts argon arc welding to allow.The requirement of the cleannes of welding place is also very low in addition, as long as no greasy dirt, dust-laden requires also not tight, selects for use suitable welding wire can remove heat treatment from.
Because thin damping sheet can improve elasticity, also can produce vibration frequency in the work, flowtube can produce surging when this frequency and master oscillator frequenc produced resonance, and this surging causes interference can for detection information.In order to improve the rigidity of damping sheet, damping sheet of the present invention is got thickness b=4～5 δ.Thicken damping sheet except solving the red heat influence, also got rid of the possibility that damping sheet becomes flexible member.
The deformation rule of argon arc welding damping sheet, basic for two parallel pipes curve inwardly, so should adopt the technological measure of reversible deformation during welding, postwelding does not need to correct.
Claims (3)
1. the welding method of damping sheet and flowtube in the coriolis mass flowmeters, setting the flowtube caliber is d, and pipe thickness is δ, and δ 〉=2 millimeter is characterized in that imposing according to the following steps manual argon arc welding:
1) selected damping sheet thickness is b=4-5 δ;
2) offer the hole of passing for flowtube at damping sheet;
3) offer at damping sheet and become concentrically ringed annular groove with aforementioned apertures;
4) after being penetrated damping sheet, flowtube imposes manual argon arc welding.
2. the welding method of damping sheet and flowtube in the coriolis mass flowmeters according to claim 1 is characterized in that: setting the damping sheet aperture is D, gets D=d (1+0.5%); The annular groove inner ring diameter is D+2 δ, and the annular groove race diameter is D+5 δ, and the annular groove degree of depth is t=1.5 δ.
3. the welding method of damping sheet and flowtube in the coriolis mass flowmeters according to claim 1 is characterized in that: the technological measure that adopts reversible deformation during welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810204245A CN101745721A (en) | 2008-12-09 | 2008-12-09 | Welding method of damper plate and flow tube in Coriolis mass flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810204245A CN101745721A (en) | 2008-12-09 | 2008-12-09 | Welding method of damper plate and flow tube in Coriolis mass flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101745721A true CN101745721A (en) | 2010-06-23 |
Family
ID=42473688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810204245A Pending CN101745721A (en) | 2008-12-09 | 2008-12-09 | Welding method of damper plate and flow tube in Coriolis mass flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101745721A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9360358B2 (en) | 2011-11-18 | 2016-06-07 | Qingdao Add Value Flow Metering Co., Ltd. | Coriolis mass flow meter, vibrating tube density meter and vibrating sheet used therein |
| CN110686741A (en) * | 2019-11-22 | 2020-01-14 | 沃森测控技术（河北）有限公司 | Joint structure for mass flowmeter and mass flowmeter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5469538A (en) * | 1977-11-15 | 1979-06-04 | Hitachi Zosen Corp | Joining method for tube and tube plate in heat exchanger or the like |
| JPS60180676A (en) * | 1984-02-28 | 1985-09-14 | Mitsubishi Heavy Ind Ltd | Tube assembling structure |
| CN1792532A (en) * | 2005-12-31 | 2006-06-28 | 天脊煤化工集团有限公司 | Method for welding inner hole of heat exchanger |
-
2008
- 2008-12-09 CN CN200810204245A patent/CN101745721A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5469538A (en) * | 1977-11-15 | 1979-06-04 | Hitachi Zosen Corp | Joining method for tube and tube plate in heat exchanger or the like |
| JPS60180676A (en) * | 1984-02-28 | 1985-09-14 | Mitsubishi Heavy Ind Ltd | Tube assembling structure |
| CN1792532A (en) * | 2005-12-31 | 2006-06-28 | 天脊煤化工集团有限公司 | Method for welding inner hole of heat exchanger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9360358B2 (en) | 2011-11-18 | 2016-06-07 | Qingdao Add Value Flow Metering Co., Ltd. | Coriolis mass flow meter, vibrating tube density meter and vibrating sheet used therein |
| CN110686741A (en) * | 2019-11-22 | 2020-01-14 | 沃森测控技术（河北）有限公司 | Joint structure for mass flowmeter and mass flowmeter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2014005754A (en) | Turbine rotor, manufacturing method thereof and steam turbine using turbine rotor | |
| CN103331327B (en) | A kind of composite bimetal pipe welding method of girth weld | |
| CN103437834B (en) | Stress-free mounting method of flange at inlet steam pipe section of turbine | |
| CN101745721A (en) | Welding method of damper plate and flow tube in Coriolis mass flowmeter | |
| CN111203669A (en) | Pipe-pipe plate welding groove suitable for nickel-based welding material | |
| US20080067214A1 (en) | Dissimilar metal transition for superheater or reheater tubes | |
| CN106001825A (en) | Connecting method for corrosion-resistant high-temperature alloy pipe and corrosion-resistant high-temperature pipe plate and heat exchanger | |
| CN106002129B (en) | A kind of manufacture craft of large-sized nickel alloy double tube plate heat exchanger | |
| CN102721605B (en) | Pressure testing tool for opening connecting tubes without flange seal | |
| CN202580332U (en) | Bimetal composite pipe fitting with instrument joint | |
| JP2012215474A (en) | Coolant piping structure | |
| CN207487757U (en) | The supporting member and high-pressure flowmeter of high-pressure flowmeter | |
| CN202852234U (en) | Thin-wall stainless steel pipeline socket brazing connecting structure | |
| CN203322515U (en) | Straight-slit compound steel pipe for conveying acid media | |
| CN205776421U (en) | Reinforced sound detecting pipe | |
| CN101545834B (en) | Improved superheated steam sampler | |
| CN203663822U (en) | Acrylate esterification reactor with titaniumtim and stainless steel combined structure | |
| CN210070680U (en) | Central tube structure of spiral plate heat exchanger | |
| CN100561139C (en) | The shell of mass flowmeter | |
| CN208169709U (en) | A kind of cannula structure that can reduce the temperature difference | |
| JP6008632B2 (en) | Welded structure of high strength low alloy steel, boiler water wall panel, and manufacturing method thereof | |
| CN100427195C (en) | Method for producing centre tube of reactor | |
| CN101474738B (en) | Method for manufacturing revolving furnace water-cooling mouth | |
| CN208975781U (en) | Tower and its device for preventing liquid fluctuation | |
| CN214464767U (en) | Exhaust pipe structure of air conditioner compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100623 |