CN205166125U - Welded structure of stainless steel gas cylinder inner bag longitudinal joint - Google Patents
Welded structure of stainless steel gas cylinder inner bag longitudinal joint Download PDFInfo
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- CN205166125U CN205166125U CN201520932016.6U CN201520932016U CN205166125U CN 205166125 U CN205166125 U CN 205166125U CN 201520932016 U CN201520932016 U CN 201520932016U CN 205166125 U CN205166125 U CN 205166125U
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- longitudinal joint
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- cooling water
- air guide
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Abstract
The utility model discloses a welded structure of stainless steel gas cylinder inner bag longitudinal joint, including the bar accessory plate, leading gas pocket and air guide groove are seted up along length direction to the bar accessory plate, leading gas pocket and air guide groove parallel arrangement are equipped with a plurality of air guide apertures between leading gas pocket and the air guide groove, the both ends of air guide aperture communicate leading gas pocket and air guide groove respectively, the cross section in air guide groove with wait that the cross section that welds the longitudinal joint is located the coplanar. The utility model discloses a MIG automatic welding technology, disposable input cost such as welding equipment is low, and in the use in later stage, the operation and maintenance cost that drops into is also lower, and work efficiency also improves greatly. Adopt the utility model provides a technology, in the actual longitudinal joint welding process of adiabatic gas cylinder of welding and the automobile -used bottle of LNG, the nondestructive test qualification rate reaches more than 99.4%, the complete meet the standard requirement of physics and chemistry pilot project.
Description
Technical field
The utility model relates to the inner bag longitudinal seam welding technique of a kind of insulated gas cylinder and LNG car bottle, in particular a kind of Welding Structure of stainless steel cylinder liner longitudinal joint.
Background technology
Welded insulated gas cylinder and LNG car bottle (being also automobile liquefied natural gas bottle), primarily of inner bag and shell composition, are vacuum interlayer between inner bag and shell.In order to improve the heat insulation effect of gas cylinder, vacuum interlayer requires to vacuumize.The inner bag of gas cylinder is for storing cryogenic media, and the internal pressure produced after bearing cryogenic media vaporization; It is made up of inner bag front head assembly, inner bag cylindrical shell and inner bag rear head assembly three part.The shell of gas cylinder for the protection of the interior arrangement of gas cylinder, and plays the effect of isolated vacuum interlayer.At present, the making of inner bag cylindrical shell all adopts the trade mark to be that the mode that the stainless-steel sheet of 06Cr19Ni10 carries out welding after rolling up circle processes, and is usually referred to as inner bag longitudinal seam welding.Inner bag corrosion resistant plate thickness is generally no more than 6mm.
According to the standard-required of welded insulated gas cylinder and LNG car bottle, cylinder liner longitudinal joint requires complete penetraction and fusion in welding, and needs to carry out that 100% ray detection is qualified just can use afterwards.Such one side is to improve inner bag intensity, enables inner bag bear interior pressure, ensures the use safety of gas cylinder.Welding quality qualified on the other hand, can ensure the compactness of weld seam, is the essential condition ensureing gas cylinder layer vacuum.
06Cr19Ni10 is the one of austenitic stainless steel, and it has good cold and hot working performance, nonmagnetic, and has excellent cryogenic property, and therefore welded insulated gas cylinder and LNG car bottle all adopt this material manufacture.This trade mark stainless steel has good solderability on the whole, but works as the improper or residing environmental medium condition of process conditions not at that time, easily causes intercrystalline corrosion and HOT CRACK FOR WELDING P, weakens the crack resistance of welding.In addition, such as pore, lack of penetration, slag inclusion, incomplete fusion, weld crack, undercut, the weld defect such as overlap and arc crater may also be there is.If welding existing defects, then vacuum interlayer vacuum will be affected, thus have influence on the heat-insulating property of gas cylinder, cause the frequent discharge of gas cylinder safely valve, produce the waste of gas; More seriously the leakage of gas may cause the blast of gas cylinder, causes casualties and the loss of national wealth.Therefore how to reduce and even eliminate these weld defects, improve the welding quality of weld seam, become each enterprise urgent need to solve the problem.
Prior art, adopts Plasma Welding mostly.Adopt this welding procedure, due to PLASMA ARC WELDING equipment costly, disposable input ratio is larger.And this kind equipment welding parameter is more, require higher to the technical merit of welding operating personnel; Welding gun and control circuit also more complicated, the service life of nozzle is very low, the later stage drop into and maintenance cost high; In the process of welding, easily produce two arc drawback, and the observation in arcing region is looked into, and easily produces weld defect.
Also have part to adopt the mode of manual welding, but this welding procedure same weld seam needs to weld several times, also needs bevel just can complete for thickness of slab >=4mm, operating efficiency is low, and Non-Destructive Testing qualification rate is not high.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of Welding Structure of stainless steel cylinder liner longitudinal joint, improves welding efficiency and solder yield.
The utility model is achieved through the following technical solutions, Welding Structure described in the utility model comprises bar shaped accessory plate, described bar shaped accessory plate offers leading pore and air slot along its length, described leading pore and air slot be arranged in parallel, dominate and between pore and air slot, be provided with multiple air-guide pore, the two ends of described air-guide pore are communicated with leading pore and air slot respectively, and the cross section of described air slot and the cross section of longitudinal joint to be welded are positioned at same plane.
Described bar shaped accessory plate is copper bar.The material of the high-termal conductivity selected is as transmitting medium.
As one of preferred embodiment of the present utility model, described bar shaped accessory plate is aluminum strip, aluminum alloy bar or stainless steel strip.
For the ease of distribution of gas, the latus rectum of described leading pore is 3 ~ 10mm, and the latus rectum of described air-guide pore is 0.5 ~ 1.5mm, and the latus rectum of described air slot is 3 ~ 12mm.
Described bar shaped accessory plate offers cooling water hand-hole along its length and cooling water portals, and cooling water enters bar shaped accessory plate from cooling water hand-hole, then to portal outflow from cooling water.Logical cooling water circulation, can be delivered in cooling water by the heat produced in welding process, take away with the flowing of cooling water, prevent the generation of HOT CRACK FOR WELDING P.
As one of preferred embodiment of the present utility model, the latus rectum that described cooling water hand-hole and cooling water portal is 4 ~ 12mm.
The utility model has the following advantages compared to existing technology: the utility model adopts MIG automatic welding process, and the disposable input cost such as welding equipment is low; And in the use procedure in later stage, the operation and maintenance cost of input is also lower, and operating efficiency also improves greatly.The utility model welding operation is simple, and less demanding to operating personnel, common welding operation work can be finished the work, and is beneficial to carrying out of work.The utility model technique, by reserve during dress 0 ~ 1mm to dress clearance t, can through welding be improved, ensure weld seam complete penetraction and fusion in welding, prevent incomplete fusion and incomplete penetration defect.Logical oxygen content in welding gun is adopted to be the argon oxygen gas mixture of 2%, can refinement molten drop, reduce the critical current of spray transfer, reduce viscosity and the surface tension of metal liquid, thus prevent the defect such as pore and undercut; Drag in cover and in air slot at welding gun and pass into high-purity argon, because high-purity argon is inert gas, with the weld seam after the welding of inert gas parcel, there will not be oxidative phenomena, prevent the defects such as slag inclusion, overlap and arc crater.Adopt the mode of recirculated water to cool, the heat produced can be cooled, prevent the generation of HOT CRACK FOR WELDING P defect in welding process.By adjustment operating procedure and the reasonable set to the welding parameter such as welding current and weldingvoltage, the appearance of other weld defects can be effectively reduced.Adopt the technique in the utility model, in the actual longitudinal seam welding process of welded insulated gas cylinder and LNG car bottle, Non-Destructive Testing qualification rate reaches more than 99.4%; Physicochemical test project meets standard-required completely.
Accompanying drawing explanation
Fig. 1 is embodiment 1 welding job view;
Fig. 2 is welded structural representation;
Fig. 3 is the close-up schematic view at A position in Fig. 2;
Fig. 4 is the structural representation of embodiment 2.
Detailed description of the invention
Below embodiment of the present utility model is elaborated; the present embodiment is implemented under premised on technical solutions of the utility model; give detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment 1
As shown in Figures 1 to 3, the Welding Structure of the present embodiment comprises copper bar 3, described copper bar 3 offers leading pore 302 and air slot 305 along its length, described leading pore 302 and air slot 305 be arranged in parallel, dominate and between pore 302 and air slot 305, be provided with multiple air-guide pore 304, the two ends of described air-guide pore 304 are communicated with leading pore 302 and air slot 305 respectively, and the cross section of described air slot 305 and the cross section of longitudinal joint to be welded 101 are positioned at same plane.
The latus rectum of leading pore 302 is 10mm, and the latus rectum of described air-guide pore 304 is 1.5mm, and the latus rectum of described air slot 305 is 12mm.
Copper bar 3 offers cooling water hand-hole 301 along its length and cooling water portals 303, and cooling water enters copper bar 3 from cooling water hand-hole 301, then to portal 303 outflows from cooling water.Logical cooling water circulation, can be delivered in cooling water by the heat produced in welding process, take away with the flowing of cooling water, prevent the generation of HOT CRACK FOR WELDING P.
The cooling water hand-hole 301 of the present embodiment and cooling water portal 303 latus rectum be 12mm.
A welded welding method for stainless steel cylinder liner longitudinal joint 101, comprises the following steps:
(1) volume circle
Corrosion resistant plate makes cylindrical shell 1 through rolling up circle;
(2) to decorateeing weldering
Cylindrical shell 1 is carried out butt welding in spot, form longitudinal joint 101, to the unfitness of butt that should ensure cylindrical shell 1 when decorateeing weldering, the minimax diameter difference of end face mismatch amount, cylindrical shell 1 and corner angle height should meet the standard-required of welded insulated gas cylinder and LNG car bottle, are 0 ~ 1mm to dress clearance t;
(3) run-on tab 2 and arc-extinguishing plate 4 is put
The two ends of gas cylinder to be welded are along the same rectilinear direction of longitudinal joint 101 spot welding run-on tab 2 and arc-extinguishing plate 4 respectively, and run-on tab 2 and arc-extinguishing plate 4 have two pieces respectively, and the gap between the gap between two pieces of run-on tabs 2, two pieces of arc-extinguishing plates 4 and longitudinal joint 101 are on the same line;
(4) be installed
Cylindrical shell 1 is positioned on the copper bar 3 of automatic welder(welding machine), makes the longitudinal joint 101 on cylindrical shell 1 and the air slot 305 on copper bar 3 in same plane.Start the hold-down mechanism on welding machine, the pressing plate on welding machine is pushed down cylindrical shell 1, guarantee that cylindrical shell 1 and copper bar 3 closely cooperate;
(5) weld
Start welding machine, cooling water brings into operation, and enters from the cooling water hand-hole 301 copper bar 3, and portals from cooling water and 303 get back to water tank.The heat produced by welding process middle cylinder body 1 passes to cooling water through copper bar 3, doing so avoids the ardent property influence factor of weld seam.Should lead to high-purity argon protection gas before welding on the leading pore 302 of copper bar 3, the air-guide pore 304 of protection gas on copper bar 3 enters in air slot 305, the longitudinal seam back side is played to the effect of protection, prevents weld seam be oxidized and produce weld defect.Logical mixed gas protected gas on welding gun, logical high-purity argon protection gas on cover is dragged at welding gun, carry out welding MIG weldering, start on run-on tab 2 during the welding starting the arc, to continue after longitudinal joint 101 has welded to be welded on arc-extinguishing plate 4 and stop, the starting the arc due to welding can be prevented so larger with receipts arc current variation in voltage, and cause weld defect;
Welding gun drags the protection gas on cover and copper bar 3 to postpone 2 ~ 10s; Cooling water on copper bar 3 postpones 5 ~ 30s, then closing device, and welding completes.
The stainless steel of the present embodiment is 06Cr19Ni10, and welding procedure is: welding material is ER308LSi, and gage of wire is 0.9 ~ 1.6mm; Welding current is 180 ~ 260A, and weldingvoltage is 22.5 ~ 28.5V; Speed of welding is 30 ~ 50cm/min.
The welding gun protection gas of the present embodiment is that oxygen is argon-mixed, and during described oxygen is argon-mixed, Ar content is 98%, O
2content is 2%, and flow is 10 ~ 20L/min; Describedly drag cover and gas port protection gas to be the Ar of purity 99.99%, flow is 5 ~ 12L/min.
Non-Destructive Testing.By above-mentioned welding method, according to welded insulated gas cylinder and LNG car bottle standard-required, carry out Non-Destructive Testing by standard JB/T4730.2-2005, the test piece for welding 100%II level of 500mm length is qualified.
Physicochemical test.Test piece for welding presses welded insulated gas cylinder and LNG car bottle standard-required, processes 1 tensile sample, 2 horizontal face-bend test specimens, and laterally carry on the back curved sample for 2,3 low-temperature impact samples, result of the test meets standard-required completely.Test specimen corrosion among crystalline grains is according to qualified after GB/T4334 method E sulfuric acid-copper sulphate etch test.
Embodiment 2
As shown in Figure 4, run-on tab 2 and the arc-extinguishing plate 4 of the present embodiment are one piece, and the center line of run-on tab 2 and arc-extinguishing plate 4 and longitudinal joint 101 are on the same line.
Other embodiments are identical with embodiment 1.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. the Welding Structure of a stainless steel cylinder liner longitudinal joint, it is characterized in that, described Welding Structure comprises bar shaped accessory plate, described bar shaped accessory plate offers leading pore and air slot along its length, described leading pore and air slot be arranged in parallel, dominate and be provided with multiple air-guide pore between pore and air slot, the two ends of described air-guide pore are communicated with leading pore and air slot respectively, and the cross section of described air slot and the cross section of longitudinal joint to be welded are positioned at same plane.
2. the Welding Structure of a kind of stainless steel cylinder liner longitudinal joint according to claim 1, it is characterized in that, described bar shaped accessory plate is copper bar.
3. the Welding Structure of a kind of stainless steel cylinder liner longitudinal joint according to claim 1, it is characterized in that, described bar shaped accessory plate is aluminum strip, aluminum alloy bar or stainless steel strip.
4. the Welding Structure of a kind of stainless steel cylinder liner longitudinal joint according to claim 1, is characterized in that, the latus rectum of described leading pore is 3 ~ 10mm, and the latus rectum of described air-guide pore is 0.5 ~ 1.5mm, and the latus rectum of described air slot is 3 ~ 12mm.
5. the Welding Structure of a kind of stainless steel cylinder liner longitudinal joint according to claim 1, it is characterized in that, described bar shaped accessory plate offers cooling water hand-hole along its length and cooling water portals, and cooling water enters bar shaped accessory plate from cooling water hand-hole, then to portal outflow from cooling water.
6. the Welding Structure of a kind of stainless steel cylinder liner longitudinal joint according to claim 5, it is characterized in that, the latus rectum that described cooling water hand-hole and cooling water portal is 4 ~ 12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520932016.6U CN205166125U (en) | 2015-11-19 | 2015-11-19 | Welded structure of stainless steel gas cylinder inner bag longitudinal joint |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520932016.6U CN205166125U (en) | 2015-11-19 | 2015-11-19 | Welded structure of stainless steel gas cylinder inner bag longitudinal joint |
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| CN205166125U true CN205166125U (en) | 2016-04-20 |
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| CN201520932016.6U Expired - Fee Related CN205166125U (en) | 2015-11-19 | 2015-11-19 | Welded structure of stainless steel gas cylinder inner bag longitudinal joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105252121A (en) * | 2015-11-19 | 2016-01-20 | 安徽大盘特种装备车辆有限公司 | Welding structure for inner container longitudinal seam of stainless steel gas cylinder and welding method |
-
2015
- 2015-11-19 CN CN201520932016.6U patent/CN205166125U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105252121A (en) * | 2015-11-19 | 2016-01-20 | 安徽大盘特种装备车辆有限公司 | Welding structure for inner container longitudinal seam of stainless steel gas cylinder and welding method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20211119 |
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| CF01 | Termination of patent right due to non-payment of annual fee |