CN201218372Y - Screw connector of bi-metal composite pipe - Google Patents
Screw connector of bi-metal composite pipe Download PDFInfo
- Publication number
- CN201218372Y CN201218372Y CNU200820108713XU CN200820108713U CN201218372Y CN 201218372 Y CN201218372 Y CN 201218372Y CN U200820108713X U CNU200820108713X U CN U200820108713XU CN 200820108713 U CN200820108713 U CN 200820108713U CN 201218372 Y CN201218372 Y CN 201218372Y
- Authority
- CN
- China
- Prior art keywords
- pipe
- thread
- composite bimetal
- nipple
- pipe nipple
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002905 metal composite material Substances 0.000 title abstract 6
- 210000002445 nipple Anatomy 0.000 claims abstract description 63
- 239000002131 composite material Substances 0.000 claims description 65
- 239000007769 metal material Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 4
- 238000010168 coupling process Methods 0.000 abstract 4
- 238000005859 coupling reaction Methods 0.000 abstract 4
- 229910001220 stainless steel Inorganic materials 0.000 description 13
- 239000010935 stainless steel Substances 0.000 description 11
- 239000000956 alloy Substances 0.000 description 9
- 229910000975 Carbon steel Inorganic materials 0.000 description 7
- 239000008186 active pharmaceutical agent Substances 0.000 description 7
- 239000010962 carbon steel Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000001741 organic sulfur group Chemical group 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
A screwed connector joint of a double-metal composite pipe is mainly applied to an oil pipe and a sleeve connected through a screwed coupling in the oil industry. The utility model is characterized in that the connector joint comprises a double-metal composite pipe, a pipe nipple and a coupling, wherein the double-metal composite pipe is composed of an inner pipe and an outer pipe; the pipe nipple is arranged at the end part of the double-metal composite pipe; the diameter of the inner hole of the pipe nipple is equal to the inside diameter of the inner pipe; an external thread is arranged at the end of the pipe nipple; the coupling is connected to the external thread at the pipe nipple; and the two ends of the coupling are provided with an internal thread. The connector joint has the advantages that the connection of the dual-metal composite pipe is endowed with better sealing effect and corrosion resistant performance, the connecting structure of the connector joint is simple, the operation at the construction field is simple and easy to grasp, and the like.
Description
Technical field
The utility model relates to the composite bimetal pipe technical field, particularly the linkage structure of the thread head of composite bimetal pipe.Be particularly suitable for adopting in the petroleum industry oil pipe and the sleeve pipe of threaded collar joint connection, promote the use of in also can connecting at the pipeline of industries such as chemical industry, plumbing, pharmacy, food.
Background technique
Metallic conduit is widely used in the oil and natural gas industry, and making the most frequently used material of metallic conduit is carbon steel and low-alloy, such as 20# steel, 30# steel, 45# steel, Q235,16Mn and 16MnR, 09MnV etc.Shortage along with global energy, continuing to increase of petroleum natural gas exploration dynamics, high temperature, high pressure, height contain H2S and C02, height and contain the exploitation of having to of Cl-and the high oil gas well that contains abominable corrosive environment such as organic sulfur, but carbon steel and low alloy material corrosion rate in abominable corrosive environment is very high, life-span is very short, is difficult to satisfy usage requirement.Two ten years in the past, though the pipeline with stainless steel such as 13Cr, 304,316L, 22Cr and 25Cr and nickel-bass alloy material manufacturings such as UNS N08028, UNS N08825, UNS N06985, UNS N06950, UNS N10276 and UNS N07718 has outstanding decay resistance, can be well under harsh corrosive environment long-term safety be on active service.But the price of this class stainless steel and nickel-base alloy tubing is very expensive, is 2～60 times of Ordinary Steel pipe, and high cost has limited being extensive use of of stainless steel and nickel-base alloy tubing pipeline.
Chinese patent ZL01222379.4, ZL01219786.6, ZL99223582.0 and ZL03201092.3 provide a kind of composite bimetal pipe technology, this technology with carbon steel material as outer tube, with stainless steel material as interior pipe, the carbon steel outer tube has guaranteed the mechanical property of pipeline, and interior pipe provides necessary decay resistance.But connecting structure hampers the application of composite bimetal pipe always.Though Chinese patent is searched the head that is welded to connect that power notification number CN2466470Y provides a kind of composite pipe, but, under the in use many situations of pipeline by being threaded, as pipeline and being connected of threeway be by being threaded, the oil pipe that uses in the industrial gas oil all is connected by threaded collar joint with sleeve pipe.Chinese patent notice of authorization CN2643121Y provides a kind of tapered pipe thread self-adapting seal device.Employing between teflin ring is set in the threaded collar joint method solve the composite bimetal pipe problem that is threaded, the shortcoming of this technology has 2 points, first teflon easy deformation in the environment of High Temperature High Pressure is aging, tend to cause blow-by, the screw thread of composite pipe end face is exposed, two kinds of intermetallic potential differences of multiple tube inner tube and outer tube can be quickened screw thread and the corrosion of pipe end face, cause to connect and lose efficacy; Its two installations seal ring complex process, and engineering site operating mode complexity causes the connection defective easily.
Summary of the invention
The purpose of this utility model is: a kind of composite bimetal pipe thread connecting joint is provided, composite bimetal pipe is connected firmly, and have simple in structure, sealability is reliable, easy to use, characteristics that cost is low.Overcome the deficiency that present composite bimetal pipe is threaded and exists.
The technological scheme that the utility model adopted is: the composite bimetal pipe thread connecting joint comprises composite bimetal pipe, pipe nipple and box cupling composition, composite bimetal pipe is made up of interior pipe and outer tube, it is characterized in that: the end at composite bimetal pipe is welded with pipe nipple.The diameter of bore of pipe nipple is identical with the internal diameter of interior pipe, in the end of pipe nipple outside thread is arranged.On the outside thread of pipe nipple, be connected with box cupling.There is internal thread at the two ends of box cupling.
Described composite bimetal pipe end is meant an end of composite bimetal pipe or the two end part of composite bimetal pipe.
The internal thread at described pipe nipple end outside thread and box cupling two ends, employing be API round thread or buttress thread button-type.The outside thread of box cupling two ends internal thread and pipe nipple forms and is sealed and matched.
Described pipe nipple adopts the metallic material identical with pipe in the composite bimetal pipe to make with box cupling.As 316L stainless steel, 2205 two phase stainless steels or UNS N06985 nickel-base alloy.
The beneficial effects of the utility model: the utility model composite bimetal pipe thread connecting joint, the intensity height also has good tightness and anti-corrosive properties.Adopt stainless steel or the abros identical to make with the pipe nipple that composite bimetal pipe connects with interior pipe, the whole of tube fluid contact be single metal material, have avoided two kinds of intermetallic potential differences of multiple tube inner tube and outer tube to form galvanic couples acceleration screw threads and pipe end face and have corroded and cause and be connected inefficacy.The composite bimetal pipe thread connecting joint Placement that the utility model provides is simple, and is easy in construction work execute-in-place method, grasps easily.
Description of drawings
Fig. 1 is the utility model composite bimetal pipe thread connecting joint connection diagram.Comprise and adopting and interior pipe same material is made has externally threaded pipe nipple and have the box cupling of internal thread and the weld seam between composite pipe and the pipe nipple;
Among the figure, 1. interior pipe, 2. outer tube, 3. weld seam, 4. pipe nipple, 5. box cupling, 6. outside thread, 7. internal thread.
Embodiment
Consult Fig. 1.The composite bimetal pipe thread connecting joint comprises composite bimetal pipe, pipe nipple 4 and box cupling 5 compositions, and composite bimetal pipe is made up of interior pipe 1 and outer tube 2.The wall thickness of interior pipe 1 is 1.5 millimeters, and internal diameter is 60 millimeters, and material is the 316L stainless steel.Outer tube 2 wall thickness are that the 20# carbon steel of 16mm constitutes.The length of composite bimetal pipe is 8 meters.
Be welded with a pipe nipple 4 respectively at the two end part of composite bimetal pipe.The internal diameter of the diameter of bore of pipe nipple 4 and interior pipe 1 is 60 millimeters; The length of pipe nipple 4 is 250 millimeters; The external diameter of pipe nipple 4 is identical with the external diameter of outer tube 2.Pipe nipple 4 one ends are welded on the composite bimetal pipe, and a ring weld seam 3 is arranged between composite bimetal pipe and the pipe nipple 4.In the other end of pipe nipple 4 outside thread 6 is arranged.What outside thread 6 adopted is API round thread button-type.Pipe nipple 4 adopt with composite bimetal pipe in manage 1 identical 316L stainless steel metal material and make.
On the outside thread 6 of pipe nipple 4, be connected with a box cupling 5.There is internal thread 7 at the two ends of box cupling 5.What the internal thread 7 at box cupling 5 two ends adopted is API round thread button-type.Box cupling 5 adopt with composite bimetal pipe in manage 1 identical 316L stainless steel metal material and make.Box cupling 5 two ends internal threads 7 are sealed and matched with outside thread 6 formation of pipe nipple 4.
The internal thread 7 of box cupling 5 forms with the outside thread of pipe nipple 46 and is sealed and matched.Just can link together with regard to two composite bimetal pipes like this, this linkage structure intensity height also has good sealing and anti-corrosive properties.
Consult Fig. 1.The composite bimetal pipe thread connecting joint comprises composite bimetal pipe, pipe nipple 4 and box cupling 5 compositions, and composite bimetal pipe is made up of interior pipe 1 and outer tube 2.The wall thickness of interior pipe 1 is 2 millimeters, and internal diameter is 80 millimeters, and material is 2205 two phase stainless steels.Outer tube 2 wall thickness are that the Q235 carbon steel of 20mm constitutes.The length of composite bimetal pipe is 9 meters.
Be welded with a pipe nipple 4 respectively at the two end part of composite bimetal pipe.The internal diameter of the diameter of bore of pipe nipple 4 and interior pipe 1 is 80 millimeters; 270 millimeters of the length of pipe nipple 4; The external diameter of pipe nipple 4 is identical with the external diameter of outer tube 2.Pipe nipple 4 one ends are welded on the composite bimetal pipe, and a ring weld seam 3 is arranged between composite bimetal pipe and the pipe nipple 4.In the other end of pipe nipple 4 outside thread 6 is arranged.What outside thread 6 adopted is API buttress thread button-type.Pipe nipple 4 adopt with composite bimetal pipe in manage 1 identical 2205 two phase stainless steel metallic material and make.
On the outside thread 6 of pipe nipple 4, be connected with a box cupling 5.There is internal thread 7 at the two ends of box cupling 5.What the internal thread 7 at box cupling 5 two ends adopted is API buttress thread button-type.Box cupling 5 adopt with composite bimetal pipe in manage 1 identical 2205 two phase stainless steel metallic material and make.Box cupling 5 two ends internal threads 7 are sealed and matched with outside thread 6 formation of pipe nipple 4.
The internal thread 7 of box cupling 5 forms with the outside thread of pipe nipple 46 and is sealed and matched.Just can link together with regard to two composite bimetal pipes like this, this linkage structure intensity height also has good sealing and anti-corrosive properties.
Consult Fig. 1.The composite bimetal pipe thread connecting joint comprises composite bimetal pipe, pipe nipple 4 and box cupling 5 compositions, and composite bimetal pipe is made up of interior pipe 1 and outer tube 2.The wall thickness of interior pipe 1 is 3 millimeters, and internal diameter is 100 millimeters, and material is a UNS N06985 nickel-base alloy.Outer tube 2 wall thickness are that the Q235 carbon steel of 20mm constitutes.The length of composite bimetal pipe is 10 meters.
Be welded with a pipe nipple 4 respectively at the two end part of composite bimetal pipe.The internal diameter of the diameter of bore of pipe nipple 4 and interior pipe 1 is 100 millimeters; 300 millimeters of the length of pipe nipple 4; The external diameter of pipe nipple 4 is identical with the external diameter of outer tube 2.Pipe nipple 4 one ends are welded on the composite bimetal pipe, and a ring weld seam 3 is arranged between composite bimetal pipe and the pipe nipple 4.In the other end of pipe nipple 4 outside thread 6 is arranged.What outside thread 6 adopted is API round thread button-type.Pipe nipple 4 adopt with composite bimetal pipe in manage 1 identical UNS N06985 nickel-bass alloy material and make.
On the outside thread 6 of pipe nipple 4, be connected with a box cupling 5.There is internal thread 7 at the two ends of box cupling 5.What the internal thread 7 at box cupling 5 two ends adopted is API round thread button-type.Box cupling 5 adopt with composite bimetal pipe in manage 1 identical UNS N06985 nickel-bass alloy material and make.Box cupling 5 two ends internal threads 7 are sealed and matched with outside thread 6 formation of pipe nipple 4.
The internal thread 7 of box cupling 5 forms with the outside thread of pipe nipple 46 and is sealed and matched.Just can link together with regard to two composite bimetal pipes like this, this linkage structure intensity height also has good sealing and anti-corrosive properties.
Claims (5)
1, a kind of composite bimetal pipe thread connecting joint, comprise composite bimetal pipe, pipe nipple (4) and box cupling (5) composition, wherein composite bimetal pipe is made up of interior pipe (1) and outer tube (2), it is characterized in that: be welded with pipe nipple (4) in the end of composite bimetal pipe, the diameter of bore of pipe nipple (4) is identical with the internal diameter of interior pipe (1), in the end of pipe nipple (4) outside thread (6) is arranged, be connected with box cupling (5) on the outside thread (6) of pipe nipple (4), there is internal thread (7) at the two ends of box cupling (5).
2, composite bimetal pipe thread connecting joint according to claim 1 is characterized in that: described pipe nipple (4) adopts the metallic material identical with pipe (1) in the composite bimetal pipe to make with box cupling (5).
3, composite bimetal pipe thread connecting joint according to claim 1 and 2 is characterized in that: the end of described composite bimetal pipe is the two ends of composite bimetal pipe.
4, composite bimetal pipe thread connecting joint according to claim 1 and 2, it is characterized in that: the internal thread (7) at described pipe nipple (4) end outside thread (6) and box cupling (5) two ends, what adopt is API round thread button-type, and box cupling (5) two ends internal threads (7) are sealed and matched with outside thread (6) formation of pipe nipple (4).
5, composite bimetal pipe thread connecting joint according to claim 1 and 2, it is characterized in that: the internal thread (7) at described pipe nipple (4) end outside thread (6) and box cupling (5) two ends, what adopt is API buttress thread button-type, and box cupling (5) two ends internal threads (7) are sealed and matched with outside thread (6) formation of pipe nipple (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820108713XU CN201218372Y (en) | 2008-06-19 | 2008-06-19 | Screw connector of bi-metal composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820108713XU CN201218372Y (en) | 2008-06-19 | 2008-06-19 | Screw connector of bi-metal composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201218372Y true CN201218372Y (en) | 2009-04-08 |
Family
ID=40541207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820108713XU Expired - Lifetime CN201218372Y (en) | 2008-06-19 | 2008-06-19 | Screw connector of bi-metal composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201218372Y (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915064A (en) * | 2010-09-14 | 2010-12-15 | 衡阳华菱钢管有限公司 | Bimetal compound pipe |
| CN102338247A (en) * | 2011-09-02 | 2012-02-01 | 杭州前进齿轮箱集团股份有限公司 | Connecting and supporting combined device for inner oil pipe in adjustable propeller |
| CN102374337A (en) * | 2010-08-19 | 2012-03-14 | 周俊 | On-site random length installation and construction method and pipe assembly for pipe network |
| WO2012034516A1 (en) * | 2010-09-14 | 2012-03-22 | 衡阳华菱钢管有限公司 | Bi-metal composite tube |
| CN103851283A (en) * | 2014-01-10 | 2014-06-11 | 洛阳瑞泽石化工程有限公司 | Catalyst pipeline |
| CN105526440A (en) * | 2016-01-14 | 2016-04-27 | 黄竹磬 | Shape memory alloy pipe connection device |
| CN106090469A (en) * | 2016-06-17 | 2016-11-09 | 高彬 | Conduit coupling and include the pipe network of this conduit coupling, pipe connecting method |
| CN108458173A (en) * | 2017-02-20 | 2018-08-28 | 新昌县广远管业有限公司 | The screw connection structure of liner two-phase stainless steel composite steel pipe |
| CN109687360A (en) * | 2018-11-27 | 2019-04-26 | 广东中讯通讯设备实业有限公司 | A kind of silicone pipes of good insulation preformance and preparation method thereof |
| CN110273653A (en) * | 2019-07-17 | 2019-09-24 | 山东墨龙石油机械股份有限公司 | Bimetallic is anti-corrosion tubing and casing and its attachment device |
| CN110374520A (en) * | 2019-07-18 | 2019-10-25 | 中国石油天然气集团有限公司 | A kind of double combination casing and its assembly method with girth joint |
| CN111649185A (en) * | 2020-05-29 | 2020-09-11 | 深圳市港华建设有限公司 | Mounting structure and mounting method of gas pipeline |
| CN112065297A (en) * | 2020-09-07 | 2020-12-11 | 席赫 | Coiled tubing is used in pit |
-
2008
- 2008-06-19 CN CNU200820108713XU patent/CN201218372Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374337A (en) * | 2010-08-19 | 2012-03-14 | 周俊 | On-site random length installation and construction method and pipe assembly for pipe network |
| CN102374337B (en) * | 2010-08-19 | 2013-09-04 | 周俊 | On-site random length installation and construction method and pipe assembly for pipe network |
| CN101915064A (en) * | 2010-09-14 | 2010-12-15 | 衡阳华菱钢管有限公司 | Bimetal compound pipe |
| WO2012034516A1 (en) * | 2010-09-14 | 2012-03-22 | 衡阳华菱钢管有限公司 | Bi-metal composite tube |
| CN101915064B (en) * | 2010-09-14 | 2015-05-20 | 衡阳华菱钢管有限公司 | Bimetal compound pipe |
| CN102338247A (en) * | 2011-09-02 | 2012-02-01 | 杭州前进齿轮箱集团股份有限公司 | Connecting and supporting combined device for inner oil pipe in adjustable propeller |
| CN103851283A (en) * | 2014-01-10 | 2014-06-11 | 洛阳瑞泽石化工程有限公司 | Catalyst pipeline |
| CN105526440A (en) * | 2016-01-14 | 2016-04-27 | 黄竹磬 | Shape memory alloy pipe connection device |
| CN106090469A (en) * | 2016-06-17 | 2016-11-09 | 高彬 | Conduit coupling and include the pipe network of this conduit coupling, pipe connecting method |
| CN108458173A (en) * | 2017-02-20 | 2018-08-28 | 新昌县广远管业有限公司 | The screw connection structure of liner two-phase stainless steel composite steel pipe |
| CN108458173B (en) * | 2017-02-20 | 2024-03-15 | 新昌县广远管业有限公司 | Threaded connection structure of lining stainless steel composite steel pipe |
| CN109687360A (en) * | 2018-11-27 | 2019-04-26 | 广东中讯通讯设备实业有限公司 | A kind of silicone pipes of good insulation preformance and preparation method thereof |
| CN110273653A (en) * | 2019-07-17 | 2019-09-24 | 山东墨龙石油机械股份有限公司 | Bimetallic is anti-corrosion tubing and casing and its attachment device |
| CN110374520A (en) * | 2019-07-18 | 2019-10-25 | 中国石油天然气集团有限公司 | A kind of double combination casing and its assembly method with girth joint |
| CN111649185A (en) * | 2020-05-29 | 2020-09-11 | 深圳市港华建设有限公司 | Mounting structure and mounting method of gas pipeline |
| CN112065297A (en) * | 2020-09-07 | 2020-12-11 | 席赫 | Coiled tubing is used in pit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090408 |