CN211449959U - Flange structure for aluminum alloy vacuum system - Google Patents
Flange structure for aluminum alloy vacuum system Download PDFInfo
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- CN211449959U CN211449959U CN201922311518.8U CN201922311518U CN211449959U CN 211449959 U CN211449959 U CN 211449959U CN 201922311518 U CN201922311518 U CN 201922311518U CN 211449959 U CN211449959 U CN 211449959U
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Abstract
The utility model belongs to the technical field of vacuum apparatus, in particular to a flange structure for among aluminum alloy vacuum system. The utility model provides a flange structure for among aluminum alloy vacuum system, includes the flange structure comprises flange portion and aluminum alloy-stainless steel transition pipe portion, aluminum alloy-stainless steel transition pipe portion includes aluminum alloy section and stainless steel section, the equal inside and outside footpath of aluminum alloy section and stainless steel section is through transition layer composite connection between aluminum alloy section and the stainless steel section, the transition layer forms an interface, the interface is metallurgical bonding interface, and the axle center of perpendicular to aluminum alloy-stainless steel transition pipe portion, the stainless steel section and the flange portion of aluminum alloy-stainless steel transition pipe portion are linked. The flange structure mainly solves the problem that the tightness of a connecting structure of an aluminum alloy flange and a stainless steel flange in the existing aluminum alloy vacuum system is not high. The utility model discloses the installation is simple, bonding strength is high, anticorrosive, characteristics such as the leakproofness is good.
Description
Technical Field
The utility model belongs to the technical field of vacuum apparatus, in particular to a flange structure for among aluminum alloy vacuum system.
Background
In an aluminum alloy vacuum system, parts such as a vacuum cavity and the like are made of aluminum alloy, and because aluminum materials are easy to generate oxidation reaction, a stainless steel structure and equipment such as a vacuum pipeline, a vacuum valve and the like still exist in the whole vacuum system, so that the aluminum alloy structure and the stainless steel structure are required to be connected through a flange. However, because the hardness of the aluminum alloy is lower than that of the stainless steel, the sealing performance of the connection between the aluminum alloy flange and the stainless steel is not high easily caused by adopting a direct screwing method, and the vacuum degree of an aluminum alloy vacuum system is influenced. Meanwhile, because the physical properties and mechanical properties of aluminum and steel are greatly different, and the aluminum is easy to form oxidation reaction on the surface under heating conditions, it is difficult to realize the connection between the aluminum and the steel by welding or brazing. Riveting, crimping and other modes are adopted in production, and the defects of frequent maintenance, interface corrosion and the like exist frequently.
In order to ensure the vacuum degree of the vacuum system, flanges are usually arranged on two end faces respectively, and then fastening connection is carried out through a group of bolts, but the connection structure is difficult to use under specific environment and space conditions due to large volume and mass, and meanwhile, the poor sealing property easily causes the vacuum degree of the aluminum alloy vacuum system to be poor.
The utility model discloses a bimetal composite flange pipe fitting and manufacturing method that the tip is flange joint is disclosed in utility model patent application CN101749503B that 2011 12 months 7 days disclose, this composite flange mainly is in order to solve how to realize the sealing connection of compound pipe among the prior art and provides a composite flange, this composite flange stretches out outer tube partly through the inside bushing pipe of composite pipe, the corrosion resistant alloy backing ring copper material welded connection in the annular groove in extension and the flange tip sealing surface, outer tube and ring flange are with material welded connection provide a flange structure. Although the flange structure can solve the problem of sealing connection of the composite pipe, the structure and the processing technology are complex, and meanwhile, the connection between the outer pipe 3 and the inner lining pipe 4 made of different materials still needs to use a solder with good welding performance with the two materials, so that the universality is still not strong.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem in the background art, the utility model provides a flange structure for among aluminum alloy vacuum system and manufacturing method thereof, its purpose is in order to solve among the current aluminum alloy vacuum system problem that aluminum alloy flange and stainless steel flange connection structure leakproofness are not high. The utility model discloses the installation is simple, bonding strength is high, anticorrosive, characteristics such as the leakproofness is good.
In order to achieve the above object, an embodiment of the present invention provides a flange structure for use in an aluminum alloy vacuum system, the flange structure is composed of a flange portion and an aluminum alloy-stainless steel transition pipe portion, the aluminum alloy-stainless steel transition pipe portion includes an aluminum alloy section and a stainless steel section, the inner and outer diameters of the aluminum alloy section and the stainless steel section are equal, the aluminum alloy section and the stainless steel section are connected by metallurgical bonding, the bonding position forms an interface, the interface is perpendicular to the axis of the aluminum alloy-stainless steel transition pipe portion, and the stainless steel section of the aluminum alloy-stainless steel transition pipe portion is connected with the flange portion.
Furthermore, a transition layer is arranged between the aluminum alloy section and the stainless steel section, and the transition layer can be a layered combination of one or more of a pure aluminum layer, a titanium layer and a titanium alloy layer, a copper layer and a copper alloy layer, and a nickel layer and a nickel alloy layer.
Furthermore, the aluminum alloy-stainless steel transition pipe part is prepared by an explosion cladding method, a vacuum brazing method, a friction welding method, a diffusion welding method or a rolling cladding method.
Further, the flange part is one of a butt welding flange, a flat welding flange, a plug welding flange, a loop flange, a threaded flange or a cover plate.
Furthermore, the thickness of the aluminum alloy section and the stainless steel section is 25mm and 20mm respectively, the thickness of the transition layer is 1mm, and the total thickness of the flange structure is 46 mm.
Furthermore, the outer diameter of the aluminum alloy section and the stainless steel section is 30mm, and the wall thickness of the pipe is 2 mm.
Furthermore, the connection between the aluminum alloy-stainless steel transition pipe part and the stainless steel flange part is welding, looping or threaded connection.
The above technical scheme of the utility model has following beneficial effect:
1. the traditional connection form of the aluminum alloy flange and the stainless steel flange is changed into the connection form of the stainless steel flange and the stainless steel flange, so that the purpose of connecting an aluminum alloy part and a stainless steel part is achieved, and meanwhile, the sealing performance of the connection structure is improved.
2. The utility model provides a flange structure processing technology is simple, only needs directly to cut out aluminum alloy-stainless steel transition tube portion on the composite sheet, has reduced the production and processing cost.
3. The aluminum alloy part and the stainless steel part of the composite pipeline joint are combined together in an explosion welding mode, so that the interface between the aluminum end and the steel end is metallurgical combination, the combination strength is high, the sealing performance is good, and the coolant flowing through the pipeline can not leak;
4. the utility model provides a compound pipe joint aluminium end and aluminum pipe welding in the use, the stainless steel ring flange is connected with the stainless steel ring flange, has avoided the direct welding of aluminum pipe and steel pipe to reduce the welding degree of difficulty, the possibility of appearing leaking, corroding the scheduling problem when having reduced the welding of xenogenesis tubular metal resonator.
Drawings
FIG. 1 is a schematic view of a forming structure of an aluminum alloy plate-stainless steel composite plate of the present invention;
FIG. 2 is a schematic view of the forming structure of the aluminum alloy-stainless steel transition pipe of the present invention;
FIG. 3 is a schematic cross-sectional view of a first embodiment of an aluminum alloy-stainless steel transition tube according to the present invention;
FIG. 4 is a schematic cross-sectional view of a second embodiment of the aluminum alloy-stainless steel transition tube of the present invention;
fig. 5 is a schematic view of a first embodiment of the flange structure of the present invention;
fig. 6 is a schematic view of a second embodiment of the flange structure of the present invention;
[ description of reference ]
301-aluminum alloy plate, 302-transition layer, 303-stainless steel plate, 4,11, 21-aluminum alloy-stainless steel transition pipe, 5-cutting tool, 12, 22-flange part, 13-welding seam, 103, 202, 111, 211-aluminum alloy section, 101,201,112,212-stainless steel section and 1, 2-flange structure
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The utility model discloses to current problem, a flange structure for among aluminum alloy vacuum system is provided, this flange structure has mainly solved the not high problem of aluminum alloy flange and stainless steel flange joint structural leakproofness among the current aluminum alloy vacuum system. The utility model discloses the installation is simple, bonding strength is high, anticorrosive, characteristics such as the leakproofness is good.
Example one
As shown in fig. 1-5, the embodiment of the utility model provides a flange structure for among aluminum alloy vacuum system, flange structure 1 comprises flange portion 12 and aluminum alloy-stainless steel transition pipe 11 portion, aluminum alloy-stainless steel transition pipe 11 includes aluminum alloy section 111 and stainless steel section 112, the equal equals of inside and outside footpath of aluminum alloy section 111 and stainless steel section 112, is connected through metallurgical bonding between aluminum alloy section 111 and the stainless steel section 112, the bonding position forms an interface, the interface perpendicular to aluminum alloy-stainless steel transition pipe 11's axle center just for metallurgical bonding, the stainless steel section 112 and the flange portion 111 of aluminum alloy-stainless steel transition pipe 11 are joined. Stainless steel section and stainless steel flange portion are connected among this flange structure, and aluminium alloy pipe lug connection or aluminium alloy pipe and stainless steel flange lug connection have improved the leakproofness of connecting, have guaranteed vacuum system's vacuum.
The flange structure that this application provided connects the aluminum alloy section of aluminum alloy-stainless steel transition tube portion through welding and aluminum alloy union coupling among the aluminum alloy vacuum system, passes through screw and other stainless steel flange coupling with stainless steel flange portion to realize being connected between aluminum alloy vacuum part and the stainless steel vacuum part. Compared with the traditional connection mode of the aluminum alloy flange and the stainless steel flange, the connection mode improves the sealing performance of the connection structure, guarantees the vacuum degree of a vacuum system and improves the bonding strength while achieving the purpose of connecting the aluminum alloy component and the stainless steel component.
Preferably, the aluminum alloy-stainless steel transition pipe part can be prepared by a metal compounding process such as an explosion cladding method, a vacuum brazing method, a friction welding method, a diffusion welding method, a rolling cladding method and the like. Furthermore, the aluminum alloy-stainless steel transition pipe part can be compositely connected by adopting an explosion cladding method.
Preferably, the stainless steel flange part can be selected as one of a butt welding flange, a flat welding flange, a plug welding flange, a loop flange, a threaded flange or a cover plate according to actual requirements. As shown in FIG. 5, the structural schematic diagram of the welding neck flange for the middle flange structure of the present invention is shown, the aluminum alloy-stainless steel transition pipe 11 is welded to the flange 12, and one end 121 of the flange forms a sealing surface. Wherein the aluminum alloy end 111 and the stainless steel section 112 are metallurgically joined by the transition layer 113 to form the aluminum alloy-stainless steel transition tube 11.
Because the welding neck flange is a kind of pipe fitting, is the flange that has the pipe transition for the area neck, pipe and pipe butt welding are connected, and butt welding is connected non-deformable, and the leakproofness is good, uses extensively, has corresponding rigidity and elasticity requirement and reasonable butt welding attenuate transition, and the crater is from the composition surface distance big, can the composition surface avoid welding temperature to warp. Therefore, aiming at the vacuum system, the selected welding flange has relatively better sealing effect under the working condition with higher sealing requirement.
Fig. 6 shows another embodiment of the present invention, in which a flange is required to be insert-welded, an al-stainless transition pipe 21 is inserted into a stepped ring of a flange 22 and welded to form a second embodiment of the flange structure, and a sealing surface 121 is formed with a sealing edge. Wherein the aluminum alloy section 211 and the stainless steel section 212 are metallurgically joined by the transition layer 213 to form the aluminum alloy-stainless steel transition tube 21. The plug-in welding flange means that the end part of a pipe is inserted into a flange ring ladder, has good rigidity, small welding deformation and good sealing property, and is mainly suitable for occasions with high sealing property.
The aluminum alloy-stainless steel transition pipe part is prepared by an explosion cladding method, a vacuum brazing method, a friction welding method, a diffusion welding method or a rolling cladding method. Preferably, the aluminum alloy portion and the stainless steel portion of the composite pipe joint are explosion welded. The interface between the aluminum end and the steel end is metallurgical bonding, the bonding strength is high, the sealing performance is good, and the leakage of the coolant flowing through the pipeline can be avoided;
preferably, the transition layer is a layered combination of one or more of a pure aluminum layer, a titanium layer and a titanium alloy layer, a copper layer and a copper alloy layer, and a nickel layer and a nickel alloy layer.
Preferably, the thickness of the aluminum alloy section and the stainless steel section is 25mm and 20mm respectively, the thickness of the transition layer is 1mm, and the total thickness of the flange structure is 46 mm.
Preferably, the outer diameter of the aluminum alloy section and the stainless steel section is 30mm, and the wall thickness of the pipe is 2 mm.
Example two:
the utility model also provides a manufacturing approach that is arranged in the flange structure of aluminum alloy vacuum system, the utility model provides a flange structure processing technology is simple, only needs directly to cut out aluminum alloy-stainless steel transition pipe portion on the composite sheet, has reduced the production and processing cost. Meanwhile, the aluminum alloy part and the stainless steel part of the composite pipeline joint are combined together in an explosion welding mode, so that the interface between the aluminum end and the steel end is in metallurgical combination, the combination strength is high, the sealing performance is good, and the coolant flowing through the pipeline can be ensured not to leak;
the utility model provides a manufacturing approach that is arranged in flange structure of aluminum alloy vacuum system, the essential step is:
s1, preparing an aluminum alloy-stainless steel composite board by an explosion cladding method, wherein the thicknesses of an aluminum alloy layer and a stainless steel layer are 25mm and 20mm respectively, a titanium transition layer with the thickness of 1mm is arranged between the aluminum alloy layer and the stainless steel layer, the aluminum alloy plate is laid on a stainless steel plate, and a plurality of supporting columns are uniformly distributed between the aluminum alloy plate and the stainless steel plate;
s2, uniformly paving explosives on the aluminum alloy plate in the step S1, inserting a detonator at one end of the explosive area, and detonating the explosives after all the working procedures are finished to obtain the aluminum alloy-stainless steel composite plate;
s3, according to the requirement of the size of the aluminum alloy-stainless steel transition pipe portion, a pipe joint is machined on the aluminum alloy-stainless steel composite plate, namely the aluminum alloy-stainless steel transition pipe portion 11 (shown in figure 3), the length of the aluminum alloy-stainless steel transition pipe portion is 46mm, namely the total thickness of the aluminum alloy-stainless steel composite plate, the outer diameter is 30mm, and the pipe wall is 2 mm. The length of the aluminum alloy section 111 is 25mm, the length of the stainless steel section 112 is 20mm, and the thickness of the titanium transition layer of the combined interface 113 is 1 mm;
s4, the stainless steel flange 12 is in a welding flange mode, and a sealing knife edge is processed on the sealing surface 221. The stainless steel section 112 of the aluminum alloy-stainless steel transition pipe part 11 is welded with the stainless steel flange part 12 by laser welding, the welding line is 13, and the flange structure 1 of the present invention is obtained, as shown in fig. 5. And connecting the aluminum alloy section of the aluminum alloy-stainless steel transition pipe part with an aluminum alloy pipe in an aluminum alloy vacuum system in a welding mode, and connecting the stainless steel flange part with another stainless steel flange part through a screw.
Example three:
the third embodiment is mainly different from the second embodiment in that the third embodiment adopts a plug-in welding flange, and the specific implementation steps are the same as those of the second embodiment.
The embodiment firstly adopts an explosion cladding method to prepare the aluminum alloy-stainless steel composite board, wherein the thicknesses of an aluminum alloy layer and a stainless steel layer are respectively 35mm and 30mm, and a titanium transition layer with the thickness of 1.5mm is arranged between the aluminum alloy layer and the stainless steel layer; the aluminum alloy-stainless steel composite plate is machined into an aluminum alloy-stainless steel transition pipe part 21 with the length of 66mm, namely the total thickness of the aluminum alloy-stainless steel composite plate, the outer diameter of the aluminum alloy-stainless steel composite plate is 35mm, and the pipe wall of the aluminum alloy-stainless steel composite plate is 2.5 mm. The length of the aluminum alloy section 211 is 35mm, the length of the stainless steel section 212 is 30mm, and the thickness of the titanium transition layer of the bonding interface 213 is 1.5 mm. The stainless steel flange 22 is in the form of a plug-in welding flange, and a sealing edge is processed on the sealing surface 221. With the stainless steel section 212 of aluminum alloy-stainless steel transition tube portion 21 through laser welding and stainless steel flange portion 22 welding together, the welding seam is 23, obtain the flange structure 2, as shown in fig. 6.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The flange structure is characterized by consisting of a flange part and an aluminum alloy-stainless steel transition pipe part, wherein the aluminum alloy-stainless steel transition pipe part comprises an aluminum alloy section and a stainless steel section, the inner diameter and the outer diameter of the aluminum alloy section are equal to those of the stainless steel section, the aluminum alloy section is connected with the stainless steel section through metallurgical bonding, a bonding position forms an interface, the interface is perpendicular to the axis of the aluminum alloy-stainless steel transition pipe part, and the stainless steel section of the aluminum alloy-stainless steel transition pipe part is connected with the flange part.
2. The flange structure for use in an aluminum alloy vacuum system as recited in claim 1, wherein a transition layer is further disposed between the aluminum alloy section and the stainless steel section, and the transition layer can be a layered combination of one or more of a pure aluminum layer, a titanium layer and a titanium alloy layer, a copper layer and a copper alloy layer, and a nickel layer and a nickel alloy layer.
3. The flange structure for the aluminum alloy vacuum system according to any one of claims 1 to 2, wherein the aluminum alloy-stainless steel transition pipe portion is prepared by an explosion cladding method, a vacuum brazing method, a friction welding method, a diffusion welding method or a rolling cladding method.
4. A flange structure for use in an aluminum alloy vacuum system according to any one of claims 1 to 2, wherein the flange portion is one of a butt welding flange, a flat welding flange, a plug welding flange, a lap joint flange, a threaded flange, or a cover plate.
5. A flange structure for use in an aluminium alloy vacuum system according to claim 2, wherein the aluminium alloy section and the stainless steel section have a thickness of 25mm and 20mm respectively, the transition layer has a thickness of 1mm, and the flange structure has a total thickness of 46 mm.
6. A flange structure for use in an aluminium alloy vacuum system according to any one of claims 1 to 2, wherein the aluminium alloy section and the stainless steel section have an outer diameter of 30mm and a tube wall thickness of 2 mm.
7. The flange structure for the aluminum alloy vacuum system as recited in any one of claims 1 to 2, wherein the connection between the aluminum alloy-stainless steel transition pipe portion and the stainless steel flange portion is a welding connection, a looping connection or a threaded connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922311518.8U CN211449959U (en) | 2019-12-20 | 2019-12-20 | Flange structure for aluminum alloy vacuum system |
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| CN201922311518.8U CN211449959U (en) | 2019-12-20 | 2019-12-20 | Flange structure for aluminum alloy vacuum system |
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| CN211449959U true CN211449959U (en) | 2020-09-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873246A (en) * | 2019-12-20 | 2020-03-10 | 湖南方恒复合材料有限公司 | Flange structure for aluminum alloy vacuum system and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873246A (en) * | 2019-12-20 | 2020-03-10 | 湖南方恒复合材料有限公司 | Flange structure for aluminum alloy vacuum system and manufacturing method thereof |
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Address after: 7th floor, scientific research exhibition and sales building, Hunan people printing Co., Ltd., 328 tongzipo West Road, Changsha hi tech Development Zone, Changsha, Hunan 410000 Patentee after: Hunan Fangheng New Material Technology Co.,Ltd. Address before: 7th floor, scientific research exhibition and sales building, Hunan people printing Co., Ltd., 328 tongzipo West Road, Changsha hi tech Development Zone, Changsha, Hunan 410000 Patentee before: HUNAN FORHOME COMPOSITE MATERIALS Co.,Ltd. |
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