CN213998131U - Steel-aluminum composite pipe brazing equipment - Google Patents
Steel-aluminum composite pipe brazing equipment Download PDFInfo
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- CN213998131U CN213998131U CN202022770004.1U CN202022770004U CN213998131U CN 213998131 U CN213998131 U CN 213998131U CN 202022770004 U CN202022770004 U CN 202022770004U CN 213998131 U CN213998131 U CN 213998131U
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Abstract
The utility model belongs to the technical field of the brazing of steel-aluminum composite pipes, in particular to a steel-aluminum composite pipe brazing device, which comprises two groups of plugging components, a tin furnace, a vacuumizing device and a high-pressure gas generating device, wherein the plugging components are respectively arranged at two ends of the aluminum profile and the steel pipe, and the plugging components at the two ends, the inner wall of the aluminum profile and the outer wall of the steel pipe enclose a closed space; the high-pressure gas generating device is communicated to the tin furnace through an injection pipeline and is used for injecting the molten tin material into the closed area through a pipeline connected to a discharge port of the tin furnace; the utility model provides a brazing equipment can realize the manufacturing of all kinds of regular shape steel aluminium composite pipe, and need not to use the scaling powder when brazing based on this brazing equipment, has adopted the mode of evacuation in advance simultaneously, the scaling powder corrosion problems and the defect such as gas pocket of successful having avoided salt bath brazing to exist.
Description
Technical Field
The utility model belongs to the technical field of the brazing of the compound tubular product of steel aluminium, in particular to compound tubular product equipment of brazing of steel aluminium.
Background
The steel-aluminum composite pipe is generally applied to places such as heat exchangers, cryogenic pumps and the like which need good heat conducting performance and have strict sealing requirements. The traditional steel-aluminum composite pipe adopts the processes of hydraulic expansion pipe forming, hot isostatic pressing welding or salt bath brazing forming. The tube expansion molding is to expand the tube on the tube plate by using the radial pressure generated by applying the high-pressure hydraulic pressure provided by the tube expander to the high-pressure resistant elastic rubber body, when the ultrahigh hydraulic pressure enters the high-pressure resistant elastic rubber body through the high-strength alloy core rod, the high-pressure resistant elastic rubber body generates radial pressure which is enough to enable the tube material to generate plastic deformation, thereby realizing the expansion joint between the tube and the tube plate. However, the hydraulic expansion pipe forming is only suitable for forming a structure with a regular shape, and the difficulty and the cost for forming the steel-aluminum composite pipe with an irregular shape are higher.
Hot isostatic pressing welding is to place the product in a closed container, apply equal pressure to the product and high temperature, and under the action of high temperature and high pressure, the product is sintered and densified. Various steel-aluminum composite pipes can be manufactured by hot isostatic pressing welding, but the requirements on equipment are high, and the cost is also high.
Salt bath brazing is a brazing method using molten salt as a heating and protecting medium, and generally, a resistance or gas is adopted to heat to a temperature required by brazing, and a weldment filled with brazing filler metal is immersed in a salt bath and then taken out, so that the method is also called as dip brazing. The cost and efficiency of salt bath brazing can be effectively controlled, but the problems of air holes in a brazing area, corrosion of a cosolvent and the like are difficult to solve.
SUMMERY OF THE UTILITY MODEL
To the problem among the prior art, the utility model aims to provide a compound tubular product equipment of brazing of steel aluminium, through this equipment of brazing, need not to use the scaling powder, avoided defect problems such as scaling powder corrosion problem and gas pocket that traditional salt bath brazing exists.
In order to realize the above-mentioned purpose, the utility model provides a compound tubular product equipment of brazing of steel aluminium for the welded fastening of aluminium alloy and steel pipe, the equipment of brazing include:
two groups of plugging components are arranged and are respectively positioned at two ends of the aluminum profile and the steel pipe, and the plugging components positioned at the two ends, the inner pipe wall of the aluminum profile and the outer pipe wall of the steel pipe enclose to form a closed space;
the tin furnace is used for melting tin materials, and a discharge port of the tin furnace is communicated into a closed space between the aluminum profile and one end of the steel pipe through a pipeline;
the vacuumizing device is communicated to the closed space between the aluminum profile and one end of the steel pipe through a vacuumizing pipeline;
and the high-pressure gas generating device is communicated to the tin furnace through an injection pipeline and is used for injecting the molten tin material into the closed area through a pipeline connected to a discharge port of the tin furnace.
In a further technical scheme, a straight-through valve is arranged on a pipeline connected with a discharge port of the tin furnace and used for controlling the on-off of the pipeline.
In a further technical scheme, the steel-aluminum composite pipe brazing equipment further comprises:
and one end of the pressure relief pipeline is communicated to the closed space at one end of the aluminum profile and one end of the steel pipe, and a pressure relief valve is arranged on the pressure relief pipeline and used for controlling the on-off of the pressure relief pipeline.
In a further technical scheme, the steel-aluminum composite pipe brazing equipment further comprises a transparent polytetrafluoroethylene pipe, and the pressure relief pipeline is communicated to a closed space at one end of the aluminum profile and one end of the steel pipe through the polytetrafluoroethylene pipe.
In a further technical scheme, the steel-aluminum composite pipe brazing equipment further comprises:
and the auxiliary heating device is wound on the surface of the aluminum section and used for heating the aluminum section and the steel pipe.
In a further aspect, the occlusion assembly comprises:
the sealing flange is sleeved at the end part of the aluminum section, and the outer end surface of the sealing flange extends outwards to form an accommodating space;
the fluororubber sealing ring is arranged between the inner wall of the sealing flange and the outer wall of the aluminum profile;
and the plug is inserted and fixed at the end part of the steel pipe, the outer end of the plug outwards extends out of the accommodating space, and a locking sealing piece is fixed on the plug.
The utility model also provides a steel aluminium composite pipe brazing method, including following step:
a vacuum pumping device is adopted to pump the vacuum degree in the closed area to be within 10 Pa;
and melting the tin material by a tin furnace, sending the melted tin material into the closed space from one ends of the aluminum profile and the steel pipe by using high-pressure gas generated by the high-pressure gas generating device, and finishing brazing after the temperature is reduced to normal temperature.
In a further technical scheme, the inner surface of the aluminum profile and the outer surface of the steel pipe are both subjected to nickel plating, and the thickness of the nickel plating is 3-10 mu m.
Compared with the prior art, the utility model discloses following technological effect has:
the utility model provides a brazing equipment can realize the manufacturing of all kinds of regular shape steel aluminium composite pipe, and need not to use the scaling powder when brazing based on this brazing equipment, has adopted the mode of evacuation in advance simultaneously, the scaling powder corrosion problems and the defect such as gas pocket of successful having avoided salt bath brazing to exist.
Based on the utility model provides a brazing equipment brazes, and brazed temperature is less than 300 ℃, belongs to soft soldering technology, the operation of being convenient for.
Based on the utility model provides a brazing equipment carries out the brazing face that obtains after the brazing, through the cold and hot shock treatment of liquid nitrogen to normal atmospheric temperature, the problem of fracture can not appear in the welding seam.
Other features and advantages of the present invention will be described in detail in the following detailed description.
Drawings
FIG. 1 is a schematic structural diagram of a steel-aluminum composite pipe brazing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of section A-A of FIG. 1;
FIG. 3 is an enlarged schematic view of position B of FIG. 2;
the reference numbers in the figures illustrate: 1-aluminum profile, 2-steel pipe, 10-plugging component, 11-sealing flange, 12-fluororubber sealing ring, 13-plug, 14-locking sealing element, 20-tin furnace, 201-main heating device, 21-pipeline, 211-straight-through valve, 30-vacuumizing device, 31-vacuumizing pipeline, 311-valve, 40-high pressure gas generating device, 41-injection pipeline, 50-pressure relief pipeline, 51-pressure relief valve, 60-polytetrafluoroethylene pipe and 70-auxiliary heating device.
Detailed Description
In order to make the technical means, creation characteristics, achievement purpose and efficacy of the utility model easy to understand and understand, the utility model is further clarified by combining the specific drawings.
It should be noted that, in the present invention, when an element is referred to as being "fixed" to another element, it may be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
With reference to fig. 1-3, the present invention provides a brazing apparatus for steel-aluminum composite pipes, which is used for welding and fixing an aluminum profile 1 and a steel pipe 2, and comprises a plugging assembly 10, a tin furnace 20, a vacuum pumping device 30 and a high pressure gas generating device 40; two groups of plugging components 10 are arranged and are respectively positioned at two ends of the aluminum profile 1 and the steel pipe 2, and the plugging components 10 positioned at the two ends, the inner pipe wall of the aluminum profile 1 and the outer pipe wall of the steel pipe 2 enclose to form a closed space;
the tin furnace 20 is wound with a main heating device 201 for melting tin materials, a discharge port of the tin furnace 20 is communicated to a closed space at one end of the aluminum profile 1 and one end of the steel pipe 2 through a pipeline 21, and further, for convenience of control, a straight-through valve 211 is arranged on the pipeline 21 connected to the discharge port of the tin furnace 20 and used for controlling the on-off of the pipeline 21;
the vacuumizing device 30 is communicated with the closed space at one end of the aluminum profile 1 and one end of the steel pipe 2 through a vacuumizing pipeline 31, and more specifically, for convenience of control, a valve 311 is arranged on the vacuumizing pipeline 31 and used for controlling the on-off of the vacuumizing pipeline 31;
the high-pressure gas generating device 40 is communicated to the tin furnace 20 through an injection pipeline 41 and is used for injecting the melted tin material into the closed area through a pipeline 21 connected with a discharge port of the tin furnace 20.
The utility model provides an equipment of brazing, through shutoff subassembly 10 treat the position of brazing and build out the vacuum condition, the position of brazing of treating between the inner wall of aluminium alloy 1 and the outer wall of steel pipe 2 is the vacuum atmosphere promptly, recycle high-pressure gas and introduce the molten tin material, the defect that the gas pocket appears when having solved traditional salt bath and brazing, and can not have the remaining problem of corrosive substance, good heat transfer effect between aluminium alloy 1 and the steel pipe 2 has been ensured, can effectual improvement this type of steel aluminium composite pipe's life. It is noted that the high-pressure gas is an inert gas.
The utility model discloses in, steel pipe 2 specifically can select to be nonrust steel pipe, aluminium alloy 1 have pipy cavity to supply steel pipe 2 to plant wherein to realize the welded fastening of the internal surface of aluminium alloy 1 and the surface of steel pipe 2 through brazed method. The external structure of aluminium alloy 1 can make the change according to the structure of concrete product, all is applicable to the utility model provides a brazing equipment.
The utility model provides a soldering device, its tin material that uses include that the melting point is at all tin class tin materials between 100 ℃ and 280 ℃. The utility model discloses do not do the repeated description here.
Further, according to the utility model discloses, the compound tubular product equipment of brazing of steel aluminium still include pressure release pipeline 50, pressure release pipeline 50's one end intercommunication extremely in the closed interval of aluminium alloy 1 and 2 one ends of steel pipe, be equipped with relief valve 51 on the pressure release pipeline 50 and be used for control pressure release pipeline 50's break-make. By providing this relief duct 50, the pressure in the closed space is released by the relief valve 51 after the brazing is completed.
Further, according to the utility model discloses, the compound tubular product equipment of brazing of steel aluminium still include a transparent polytetrafluoroethylene pipe 60, pressure release pipeline 50 communicate to through this polytetrafluoroethylene pipe 60 to the closed interval of aluminium alloy 1 and 2 one ends of steel pipe. Through the arrangement of the transparent polytetrafluoroethylene tube 60, when the tin material is injected into the closed space through pressure and is filled fully, the tin material in the pipeline can be observed through the transparent polytetrafluoroethylene tube 60, namely the completion of the material injection is determined, and at the moment, the through valve 211 on the pipeline 21 is closed.
The utility model discloses in, the compound tubular product equipment of brazing of steel aluminium still include auxiliary heating device 70, auxiliary heating device 70 around establishing the surface of aluminium alloy 1 is used for right aluminium alloy 1 and steel pipe 2 heat.
Further, in the present invention, as a specific embodiment of the plugging assembly 10, the plugging assembly 10 includes a sealing flange 11, a fluororubber sealing ring 12 and a plug 13; the sealing flange 11 is sleeved at the end part of the aluminum profile 1, and the outer end surface of the sealing flange 11 extends outwards to form an accommodating space; the fluororubber sealing ring 12 is arranged between the inner wall of the sealing flange 11 and the outer wall of the aluminum profile 1; the plug 13 is inserted and fixed at the end of the steel pipe 2, the outer end of the plug 13 extends outwards to form the accommodating space, and a locking sealing element 14 is fixed on the plug 13.
The utility model also provides an adopt above-mentioned brazing equipment to compound tubular product brazed method of steel aluminium, including following step: a vacuum pumping device 30 is adopted to pump the vacuum degree in the closed area to be within 10 Pa;
the tin material is melted through the tin furnace 20, the melted tin material is sent into the closed space from one end of the aluminum profile 1 and one end of the steel pipe 2 by utilizing the high-pressure gas generated by the high-pressure gas generating device 40, and the brazing is completed after the temperature is reduced to the normal temperature.
More specifically: the tin material in the tin furnace 20 is heated by the main heating device 201, after the tin material is melted, the melted tin material is injected between the aluminum profile 1 and the steel pipe 2 by the high-pressure gas generated by the high-pressure gas generating device 40, and the on-off of the tin material is controlled by the straight-through valve 211;
before tin material is injected, a valve 311 is opened, a pressure release valve 51 and a through valve 211 are closed, the vacuum degree of a closed area between an aluminum profile 1 and a steel pipe 2 is pumped to be within 10Pa through a vacuumizing device 30, then the valve 311 is closed, the aluminum profile 1 and the steel pipe 2 are heated to be higher than the melting point of the tin material by 20 ℃ through an auxiliary heating device 70, then the through valve 211 is opened, the tin material is injected through pressure, a transparent polytetrafluoroethylene pipe 60 is observed, after the tin material is found to be generated in the polytetrafluoroethylene pipe 60, the through valve 211 is closed, all heating devices are closed, after the temperature is reduced to normal temperature, a whole set of tin soldering equipment is dismantled, and soldering is completed.
In the implementation method, the inner surface of the aluminum profile 1 and the outer surface of the steel pipe 2 are both subjected to nickel plating, and the thickness of the nickel plating is 3-10 μm. By carrying out nickel plating treatment on the brazing surface, the good wettability of the tin material on the surface of the stainless steel pipe can be ensured, and the brazing strength is effectively improved.
Through the utility model provides a brazing equipment and brazing method obtain the brazing face, through the cold and hot shock treatment of liquid nitrogen to normal atmospheric temperature, the problem of fracture does not appear in the welding seam.
The foregoing shows and describes the general principles, essential features, and features of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the description of the above embodiments and the description is only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and these changes and modifications are all within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a compound tubular product of steel aluminium equipment of brazing for the welded fastening of aluminium alloy (1) and steel pipe (2), its characterized in that, the equipment of brazing include:
two groups of plugging components (10) are arranged and are respectively positioned at two ends of the aluminum profile (1) and the steel pipe (2), and the plugging components (10) positioned at the two ends, the inner pipe wall of the aluminum profile (1) and the outer pipe wall of the steel pipe (2) enclose to form a closed space;
the tin furnace (20) is used for melting tin materials, and a discharge hole of the tin furnace (20) is communicated into a closed area between the aluminum profile (1) and one end of the steel pipe (2) through a pipeline (21);
the vacuumizing device (30) is communicated into a closed space at one end of the aluminum profile (1) and one end of the steel pipe (2) through a vacuumizing pipeline (31);
and the high-pressure gas generating device (40) is communicated to the tin furnace (20) through an injection pipeline (41) and is used for injecting the molten tin material into the closed space through a pipeline (21) connected to a discharge port of the tin furnace (20).
2. The steel-aluminum composite pipe brazing equipment according to claim 1, wherein a through valve (211) is arranged on a pipeline (21) connected to a discharge port of the tin furnace (20) and used for controlling the on-off of the pipeline (21).
3. The steel aluminum composite pipe brazing apparatus of claim 1, further comprising:
and one end of the pressure relief pipeline (50) is communicated to the closed space at one end of the aluminum profile (1) and one end of the steel pipe (2), and a pressure relief valve (51) is arranged on the pressure relief pipeline (50) and used for controlling the on-off of the pressure relief pipeline (50).
4. The steel aluminum composite pipe brazing apparatus of claim 3, further comprising: the pressure relief pipeline (50) is communicated to a closed area at one end of the aluminum profile (1) and one end of the steel pipe (2) through the polytetrafluoroethylene pipe (60).
5. The steel aluminum composite pipe brazing apparatus of claim 1, further comprising: and the auxiliary heating device (70) is wound on the surface of the aluminum profile (1) and is used for heating the aluminum profile (1) and the steel pipe (2).
6. A steel aluminium composite pipe brazing apparatus according to claim 1, wherein the plugging assembly (10) comprises:
the sealing flange (11) is sleeved at the end part of the aluminum profile (1), and the outer end surface of the sealing flange (11) extends outwards to form an accommodating space;
the fluororubber sealing ring (12) is arranged between the inner wall of the sealing flange (11) and the outer wall of the aluminum profile (1);
the plug (13) is inserted and fixed at the end part of the steel pipe (2), the outer end of the plug (13) extends outwards to form the accommodating space, and a locking sealing piece (14) is fixed on the plug (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022770004.1U CN213998131U (en) | 2020-11-24 | 2020-11-24 | Steel-aluminum composite pipe brazing equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022770004.1U CN213998131U (en) | 2020-11-24 | 2020-11-24 | Steel-aluminum composite pipe brazing equipment |
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| CN213998131U true CN213998131U (en) | 2021-08-20 |
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| CN202022770004.1U Active CN213998131U (en) | 2020-11-24 | 2020-11-24 | Steel-aluminum composite pipe brazing equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112388095A (en) * | 2020-11-24 | 2021-02-23 | 合肥科烨电物理设备制造有限公司 | Steel-aluminum composite pipe brazing equipment and brazing method |
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2020
- 2020-11-24 CN CN202022770004.1U patent/CN213998131U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112388095A (en) * | 2020-11-24 | 2021-02-23 | 合肥科烨电物理设备制造有限公司 | Steel-aluminum composite pipe brazing equipment and brazing method |
| CN112388095B (en) * | 2020-11-24 | 2024-07-23 | 合肥科烨电物理设备制造有限公司 | Brazing equipment and brazing method for steel-aluminum composite pipe |
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