CN118128982A - Cast iron pipe with stainless steel lining and welding device - Google Patents
Cast iron pipe with stainless steel lining and welding device Download PDFInfo
- Publication number
- CN118128982A CN118128982A CN202410563739.7A CN202410563739A CN118128982A CN 118128982 A CN118128982 A CN 118128982A CN 202410563739 A CN202410563739 A CN 202410563739A CN 118128982 A CN118128982 A CN 118128982A
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- Prior art keywords
- stainless steel
- pipe
- cast iron
- steel pipe
- iron pipe
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Links
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 84
- 239000010935 stainless steel Substances 0.000 title claims abstract description 84
- 238000003466 welding Methods 0.000 title claims abstract description 58
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 42
- 229910001141 Ductile iron Inorganic materials 0.000 claims abstract description 30
- 230000007704 transition Effects 0.000 claims description 24
- 238000005452 bending Methods 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 11
- 230000008018 melting Effects 0.000 claims description 11
- 238000004026 adhesive bonding Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 238000003475 lamination Methods 0.000 claims description 7
- 230000005389 magnetism Effects 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000009434 installation Methods 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000004663 powder metallurgy Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009957 hemming Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
- F16L13/02—Welded joints
-
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The application discloses a cast iron pipe with a stainless steel lining and a welding device, and relates to the technical field of cast iron pipes. The application has the effect of improving the bonding compactness between the stainless steel pipe lining and the ductile cast iron pipe sleeved outside the stainless steel pipe lining.
Description
Technical Field
The application relates to the technical field of cast iron pipes, in particular to a cast iron pipe with a stainless steel lining and a welding device.
Background
The inner lining stainless steel cast iron pipe is a thin wall stainless steel pipe compounded on the inner wall of the cast iron pipe, the corrosion resistance of the steel pipe in the water, gas, natural gas and oil conveying processes is greatly improved by the bimetal composite steel pipe, the surface is smooth, the fluid resistance is small, and the high mechanical strength of the steel pipe is reserved.
However, in the prior art, the composite process of lining the stainless steel tube is complex, the stainless steel tube is usually composited on the base tube, and then the base tube is curled into a tube, gaps are easily generated between the formed base tube and the stainless steel tube, the laminating performance between the base tube and the stainless steel tube is poor, and improvement is needed.
Disclosure of Invention
The application provides a cast iron pipe with a stainless steel pipe lining and a welding device for improving the fit between a base pipe and the stainless steel pipe.
In a first aspect, the application provides a cast iron pipe lined with a stainless steel pipe, which adopts the following technical scheme:
The utility model provides a lining stainless steel pipe cast iron pipe, includes lining stainless steel pipe and cover and establishes at the outside nodular cast iron pipe of lining stainless steel pipe, it has the bonding laminating layer to fill between lining stainless steel pipe and the nodular cast iron pipe, the tip integrated into one piece of lining stainless steel pipe has the closure, can dismantle on the lateral wall of closure and be provided with the transition welding layer, the transition welding layer with the setting is hugged closely to the bonding laminating layer.
Preferably, the sealing part comprises a bending edge, the bending edge is bent and arranged close to the direction of the bonding lamination layer, a welding melting channel is arranged between the bending edge and the ductile iron pipe, and the transition welding layer is arranged on the bending edge.
Preferably, a welding connection groove is formed in the side wall, facing away from the bonding lamination layer, of the bent folded edge, and the welding connection groove is filled with soldering flux.
Preferably, the adhesive bonding layer is configured as one or more of an organic adhesive, an inorganic adhesive, a hybrid adhesive, and a metal adhesive.
Preferably, the melting point of the transition welding layer is lower than that of a surfacing layer arranged between the lining stainless steel pipe and the ductile cast iron pipe; the transition welding layer has magnetism, the transition welding layer with the lateral wall magnetism suction cooperation of crooked hem.
Preferably, the ductile cast iron pipe comprises a main pipe, a first connecting part and a second connecting part which are sequentially connected, a first step part is arranged between one end of the first connecting part and the main pipe, a second step part is arranged at one end of the first connecting part and one end of the second connecting part, a first installation part and a second installation part are arranged on the lining stainless steel pipe, and the first installation part and the second installation part are respectively matched with the first step part and the second step part.
Preferably, the outer diameter of the second connecting portion is larger than the outer diameter of the first connecting portion, and the outer diameter of the first connecting portion is larger than the outer diameter of the main pipe; along the second connecting portion towards the main pipe direction, the outer diameter of the second connecting portion is gradually reduced, and the outer diameter of the first connecting portion is gradually increased.
Preferably, the first step portion is provided with a first arc chamfer, the second step portion is provided with a second arc chamfer, and the angle of the first arc chamfer is larger than that of the second arc chamfer.
In a second aspect, the application provides a welding device for cast iron pipes with stainless steel liners, which adopts the following technical scheme:
Welding device for cast iron pipe with stainless steel lining, which is applied to cast iron pipe with stainless steel lining, comprises:
a coating module configured to coat an adhesive bonding layer between the lined stainless steel pipe and the ductile cast iron pipe;
The plugging module is configured to expand the diameter of the cast iron pipe lined with the stainless steel pipe;
The detection module is configured to detect a pressure value when the lining stainless steel pipe cast iron pipe expands in diameter;
And the welding module is configured to rotate and weld the formed lining stainless steel pipe cast iron pipe so that the melted bonding lamination layer is uniformly distributed between the lining stainless steel pipe and the ductile cast iron pipe.
In summary, the present application includes at least one of the following beneficial technical effects: the bonding layer is filled between the lining stainless steel pipe and the ductile cast iron pipe, and is heated and melted at high temperature, so that the lining stainless steel pipe and the ductile cast iron pipe are more tightly bonded, and due to the existence of the transition welding layer, the transition welding layer is separated from the lining stainless steel pipe after being heated, thereby realizing sealing welding of the end part of the lining stainless steel pipe, and further improving the bonding property between the lining stainless steel pipe and the ductile cast iron pipe.
Drawings
FIG. 1 is a schematic cross-sectional view of a cast iron pipe structure embodying the present application and lined with stainless steel pipes.
Fig. 2 is an enlarged schematic view of a portion a of fig. 1, principally embodying a curved hemming peripheral structure.
FIG. 3 is a block diagram of a cast iron pipe welding apparatus embodying the present application primarily lining stainless steel pipes.
Reference numerals illustrate: 1. lining a stainless steel tube; 11. bending and flanging; 111. welding the connecting groove; 12. a transition welding layer; 13. a ramp; 14. welding a melting channel; 2. a ductile iron pipe; 21. a main pipe; 22. a first connection portion; 23. a second connecting portion; 3. bonding the bonding layer; 4. a first step portion; 41. a first arc chamfer; 5. a second step portion; 51. a second arc chamfer; 6. a coating module; 7. plugging a module; 8. a detection module; 9. and (5) welding the module.
Detailed Description
The application is described in further detail below with reference to fig. 1-3.
In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The embodiment of the application discloses a cast iron pipe lined with a stainless steel pipe. Referring to fig. 1, a cast iron pipe lined with a stainless steel pipe comprises a stainless steel pipe lined 1 and a ductile cast iron pipe 2 sleeved outside the stainless steel pipe lined 1. In order to improve the adhesion between the lining stainless steel pipe 1 and the ductile cast iron pipe 2, an adhesion layer 3 is filled between the lining stainless steel pipe 1 and the ductile cast iron pipe 2.
In the embodiment of the present application, the adhesive bonding layer 3 is configured as a powder metallurgy adhesive, which is a key material for a powder metallurgy process capable of consolidating metal powders together at high temperature and pressure. The composition of the powder metallurgical binder plays a critical role in the performance and quality of the final product, and the powder metallurgical binder includes organic binders, inorganic binders, mixed binders, metal binders, and the like.
Different adhesive compositions have different characteristics and application ranges, and suitable adhesives can be selected according to specific requirements. The composition of the powder metallurgical binder plays a critical role in the performance and quality of the final product, and therefore careful consideration is required in the selection and use of the binder in the powder metallurgical process to ensure good performance and reliable quality of the product. In the present application, in order to ensure the stability and uniformity of the adhesive bonding layer 3, the powder metallurgy adhesive may be coated to cover the stainless steel pipe 1 after the hot melt adhesive is coated on one side thereof, and it is necessary to ensure the uniformity of the thickness of the powder metallurgy adhesive.
It should be noted that the ductile cast iron pipe 2 includes a main pipe 21, a first connecting portion 22 and a second connecting portion 23 connected in order, a first stepped portion 4 is integrally formed between one end of the first connecting portion 22 and the main pipe 21, and a second stepped portion 5 is integrally formed between the other end of the first connecting portion 22 and one end of the second connecting portion 23. Specifically, the outer diameter of the second connection portion 23 is larger than the outer diameter of the first connection portion 22, and the outer diameter of the first connection portion 22 is larger than the outer diameter of the main pipe 21; along the direction of the second connection portion 23 toward the main pipe 21, the outer diameter of the second connection portion 23 is gradually reduced, and the outer diameter of the first connection portion 22 is gradually increased.
Wherein the outer diameter of the first connecting portion 22 increases more than the outer diameter of the second connecting portion 23 decreases. The first step part 4 is provided with a first arc chamfer 41, the second connecting part 23 is provided with a second arc chamfer, and the angle of the first arc chamfer 41 is larger than that of the second arc chamfer. Be provided with first installation department and second installation department on the inside lining stainless steel pipe 1, first installation department and second installation department respectively with first step portion 4 and second step portion 5 looks adaptation.
Based on the above-mentioned arrangement, since the stainless steel pipe 1 needs to be subjected to the pressurizing and expanding treatment during the forming process of the cast iron pipe, the water pressure or the air pressure needs to be applied from the second connecting portion 23, which will be described herein by taking the water pressure as an example, in order to facilitate the installation of the pressurizing device, the end portion of the stainless steel pipe 1 is further formed with the slope 13. Because the external diameter of the second connecting portion 23 gradually decreases, when the water flow passes through the second connecting portion 23, the water pressure gradually increases, and after the water flow is blocked by the second stepped portion 5, the water pressure further increases and flows into the first connecting portion 22, and because the external diameter of the first connecting portion 22 gradually increases, the water flow which is collected into the first connecting portion 22 can meet the requirement that the increased water pressure is collected into the first connecting portion 22, is blocked again by the first stepped portion 4, and flows into the main pipe 21 after being boosted again, thereby realizing the diameter expansion of the lining stainless steel pipe 1.
Referring to the figure, in order to further improve the adhesion between the lining stainless steel pipe 1 and the ductile cast iron pipe 2, the end of the lining stainless steel pipe 1 is integrally formed with a sealing part, a transition welding layer 12 is detachably arranged on the side wall of the sealing part, and the transition welding layer 12 is closely attached to the adhesion layer 3. The sealing part comprises a bending folded edge 11, the bending folded edge 11 is bent in the direction close to the bonding lamination layer 3, a welding channel 14 is arranged between the bending folded edge 11 and the ductile iron pipe 2, and a transition welding layer 12 is arranged on the bending folded edge 11.
The side wall of the bent folded edge 11, which is away from the attaching layer, is provided with a welding connection groove 111, and the welding connection groove 111 is filled with soldering flux. It should be noted that the melting point of the transition weld layer 12 is lower than the melting point of the weld overlay provided between the lined stainless steel pipe 1 and the ductile iron pipe 2, and the weld overlay 12 is doped with an auxiliary weld layer. The transition welding layer 12 has magnetism, and the transition welding layer 12 is in magnetic attraction fit with the side wall of the bent folded edge 11.
In the actual welding process, a build-up layer needs to be placed on the end face where the stainless steel pipe and the ductile cast iron pipe 2 are connected, and in the process of melting the build-up layer, firstly, after the scaling powder in the welding connection groove 111 is mixed with the build-up layer, the melting of the build-up layer is accelerated, and the melted build-up layer can flow into the welding connection groove 111. Then, as the melting point of the transition welding layer 12 is lower, and the transition welding layer 12 has magnetism, the magnetism is reduced after being heated and is separated from the bent flange 11, and the welding auxiliary layer flowing into the welding channel 14 is fully melted to seal the welding channel 14 after being contacted with the transition welding layer 12, so that the tightness of the end face of the connection of the rust steel pipe and the nodular cast iron pipe 2 is improved.
In a second aspect, the application provides a welding device for cast iron pipes with stainless steel liners, which adopts the following technical scheme:
Welding device for cast iron pipe with stainless steel lining, which is applied to cast iron pipe with stainless steel lining, comprises:
a coating module 6 configured to coat the adhesive bonding layer 3 between the lined stainless steel pipe 1 and the ductile iron pipe 2. The coating module 6 may include a coater, a driven brush machine, etc.
A plugging module 7 configured to expand the diameter of the cast iron pipe lined with the stainless steel pipe 1. The plugging module 7 comprises a hydraulic pressure expanding device in the prior art.
And the detection module 8 is configured to detect the pressure value of the lining stainless steel pipe 1 when the cast iron pipe is subjected to diameter expansion. In an embodiment of the application, the detection module 8 comprises a water pressure gauge or a water pressure sensor or the like.
And a welding module 9 configured to rotate and weld the cast iron pipe of the formed lining stainless steel pipe 1 so that the melted adhesive bonding layer 3 is uniformly distributed between the lining stainless steel pipe 1 and the ductile iron pipe 2. The welding module 9 comprises a melting furnace and/or an intermediate frequency heating coil and a rotating platform, and realizes the rotation and welding of the cast iron pipe of the formed lining stainless steel pipe 1.
It is to be understood that the above examples of the present application are provided for clarity of illustration only and are not limiting of the embodiments of the present application. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are desired to be protected by the following claims.
Claims (9)
1. The stainless steel pipe-lined cast iron pipe is characterized by comprising a stainless steel pipe-lined pipe (1) and a ductile cast iron pipe (2) sleeved outside the stainless steel pipe-lined pipe (1), an adhesive bonding layer (3) is filled between the stainless steel pipe-lined pipe (1) and the ductile cast iron pipe (2), a sealing part is integrally formed at the end part of the stainless steel pipe-lined pipe (1), a transition welding layer (12) is detachably arranged on the side wall of the sealing part, and the transition welding layer (12) is tightly attached to the adhesive bonding layer (3);
the sealing part comprises a bending folded edge (11), the bending folded edge (11) is bent and arranged in the direction close to the bonding lamination layer (3), a welding melting channel (14) is arranged between the bending folded edge and the ductile iron pipe (2), and the transition welding layer (12) is arranged on the bending folded edge (11).
2. A lined stainless steel pipe cast iron pipe according to claim 1, wherein: and a welding connecting groove (111) is formed in the side wall of the bending folded edge (11) deviating from the bonding lamination layer (3), and the welding connecting groove (111) is internally filled with soldering flux.
3. A lined stainless steel pipe cast iron pipe according to claim 2, wherein: the adhesive bonding layer (3) is configured as one or more of an organic adhesive, an inorganic adhesive, a mixed adhesive and a metal adhesive.
4. A lined stainless steel pipe cast iron pipe according to claim 1, wherein: the melting point of the transition welding layer (12) is lower than that of a surfacing layer arranged between the lining stainless steel pipe (1) and the ductile cast iron pipe (2); the transition welding layer (12) has magnetism, and the transition welding layer (12) is in magnetic attraction fit with the side wall of the bent folded edge (11).
5. A lined stainless steel pipe cast iron pipe according to claim 1, wherein: the ductile iron pipe (2) comprises a main pipe (21), a first connecting portion (22) and a second connecting portion (23) which are sequentially connected, a first step portion (4) is arranged between one end of the first connecting portion (22) and the main pipe (21), a second step portion (5) is arranged at one end of the second connecting portion (23) and the other end of the first connecting portion (22), a first mounting portion and a second mounting portion are arranged on the lining stainless steel pipe (1), and the first mounting portion and the second mounting portion are respectively matched with the first step portion (4) and the second step portion (5).
6. A lined stainless steel pipe cast iron pipe according to claim 5, wherein: the outer diameter of the second connecting part (23) is larger than that of the first connecting part (22), and the outer diameter of the first connecting part (22) is larger than that of the main pipe (21); along the direction of the second connecting part (23) towards the main pipe (21), the outer diameter of the second connecting part (23) is gradually reduced, and the outer diameter of the first connecting part (22) is gradually increased.
7. A lined stainless steel pipe cast iron pipe according to claim 5, wherein: the first step part (4) is provided with a first arc chamfer (41), the second connecting part (23) is provided with a second arc chamfer (51), and the angle of the first arc chamfer (41) is larger than that of the second arc chamfer (51).
8. A lined stainless steel pipe cast iron pipe according to claim 1, wherein: the end part of the lining stainless steel pipe (1) is provided with a slope (13).
9. A lined stainless steel pipe cast iron pipe welding apparatus applied to the lined stainless steel pipe cast iron pipe according to any one of claims 1 to 8, comprising:
A coating module (6) configured to coat an adhesive bonding layer (3) between the lined stainless steel pipe (1) and the ductile iron pipe (2);
a plugging module (7) configured to expand the diameter of the cast iron pipe lined with the stainless steel pipe (1);
the detection module (8) is configured to detect a pressure value of the lining stainless steel pipe (1) when the cast iron pipe expands in diameter;
And the welding module (9) is configured to rotate and weld the cast iron pipe of the formed lining stainless steel pipe (1) so that the melted bonding lamination layer (3) is uniformly distributed between the lining stainless steel pipe (1) and the ductile cast iron pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410563739.7A CN118128982B (en) | 2024-05-08 | 2024-05-08 | Cast iron pipe with stainless steel lining and welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410563739.7A CN118128982B (en) | 2024-05-08 | 2024-05-08 | Cast iron pipe with stainless steel lining and welding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118128982A true CN118128982A (en) | 2024-06-04 |
| CN118128982B CN118128982B (en) | 2024-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410563739.7A Active CN118128982B (en) | 2024-05-08 | 2024-05-08 | Cast iron pipe with stainless steel lining and welding device |
Country Status (1)
| Country | Link |
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| CN (1) | CN118128982B (en) |
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| JP2017087217A (en) * | 2015-11-02 | 2017-05-25 | 株式会社ジェイテクト | Welding method and welding part inspection method |
| CN107520556A (en) * | 2017-08-23 | 2017-12-29 | 王飚 | A kind of metal and ceramic welding device and method |
| CN108213652A (en) * | 2017-12-29 | 2018-06-29 | 南京理工大学 | A kind of certainly molten PTIG welding methods of magnesium/aluminium alloy dissimilar metal |
| EP4036938A1 (en) * | 2021-02-01 | 2022-08-03 | Nexans | Subsea composite assembly for transportation of hydrogen in a bi-metallic tube |
| CN114192930A (en) * | 2021-12-31 | 2022-03-18 | 安徽博清自动化科技有限公司 | Welding process for large-gap vertical joint |
| CN117588612A (en) * | 2023-12-25 | 2024-02-23 | 湖南工程学院 | Cast iron pipe lined with stainless steel pipe and manufacturing method thereof |
| CN117685421A (en) * | 2023-12-30 | 2024-03-12 | 湖南振辉管业有限公司 | Multilayer composite pipe with end edges and manufacturing method thereof |
| CN117704162A (en) * | 2023-12-30 | 2024-03-15 | 湖南振辉管业有限公司 | Bell and spigot coated multilayer composite pipe and manufacturing method thereof |
| CN117704163A (en) * | 2023-12-30 | 2024-03-15 | 湖南振辉管业有限公司 | Bell and spigot coated composite pipe and manufacturing method thereof |
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