CN206617673U - The screw connection structure of liner two-phase stainless steel composite steel pipe - Google Patents
The screw connection structure of liner two-phase stainless steel composite steel pipe Download PDFInfo
- Publication number
- CN206617673U CN206617673U CN201720150289.4U CN201720150289U CN206617673U CN 206617673 U CN206617673 U CN 206617673U CN 201720150289 U CN201720150289 U CN 201720150289U CN 206617673 U CN206617673 U CN 206617673U
- Authority
- CN
- China
- Prior art keywords
- minor
- diameter
- steel pipe
- tube
- steel
- 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 - Fee Related
Links
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The utility model discloses the screw connection structure of liner two-phase stainless steel composite steel pipe, large diameter steel pipe and minor-diameter steel-tube including being lined with stainless steel layer, large diameter steel pipe is threadedly coupled with minor-diameter steel-tube, the screw connection structure also includes inner liner stainless steel set and paste adhesive layer, the inner liner stainless steel set is stretched into minor-diameter steel-tube, and the paste adhesive layer is riddled in the gap between inner liner stainless steel set, minor-diameter steel-tube and large diameter steel pipe three.Paste adhesive layer can be extruded before uncured, it flows and is filled in inner liner stainless steel set, in the slight gap between minor-diameter steel-tube and large diameter steel pipe three, really it is seamlessly connected between three is achieved that after the solidification of paste adhesive layer, set cooperation can prevent end face and the problem of step surface potential difference is corroded with inner liner stainless steel for it, so as to effectively increase the service life.
Description
Technical field
The utility model is related to the screw connection structure of liner two-phase stainless steel composite steel pipe, particularly relates to a kind of positive confinement simultaneously
And it is avoided that the screw connection structure of potential difference corrosion.
Background technology
In the course of conveying of fluid (water), steel pipe fittings are the most frequently used parts.But steel pipe fittings exist there is also
Some drawbacks, for example, after long-time use, inwall is easily corroded, gently then cause muddy water phenomenon, heavy then cause tube wall to rupture,
Have a strong impact on service life.In order to solve this problem, prior art is all utilized in the thickness of liner one on steel pipe fittings inwall
Degree is about 0.3mm or so stainless steel layer, prevents steel pipe fittings from directly being contacted with fluid, so as to increase the service life.Using
Above-mentioned technological means, although can greatly increase the service life, but this structure there is also it is certain the problem of, reference picture 1,
Fig. 1 is two most common thread connecting modes of steel pipe fittings, including large diameter pipe 1 ' and minor diameter pipe 2 ', large diameter pipe 1 '
It is provided with connectivity port on internal thread, the inwall of large diameter pipe 1 ' and is additionally provided with step surface 3 ', and internal thread extends inwardly to step
The position of face 3 '；The outer wall of minor diameter pipe 2 ' be provided with external screw thread, when using minor diameter pipe 2 ' be tightened in large diameter pipe 1 ' with
Reach sealing and the effect interfixed.Said structure is primarily present three below problem in actual use：First, liner is not
Rust steel layer 4 ' simply effectively envelopes steel pipe fittings (large diameter pipe 1 ' and minor diameter pipe 2 ') inwall, but large diameter pipe 1 '
The end face 21 ' of step surface 3 ' and minor diameter pipe 2 ' is not wrapped by (due to production technology limitation), and when actual use, fluid is also
It is that can directly be contacted with the two faces, causes corrosion, and because steel pipe fittings and inner liner stainless steel layer 4 ' are two kinds of materials, two
Person directly certainly exists potential difference corrosion, further aggravates extent of corrosion, and potential difference corrosion can be influenced by temperature, and work as fluid
When temperature is larger (such as hot water), potential difference corrosion can be very serious, highly shortened service life.Secondly, in order to reach
Fixed effect, the end face 21 ' of minor diameter pipe 2 ' usually requires to be torqued-up to be abutted against with the step surface 3 ' of large diameter pipe 1 ', when big
When needing to ensure certain angle between diameter tube 1 ' and minor diameter pipe 2 ', the angle, which is hardly resulted in, to be ensured, for example minor diameter pipe
2 ' the other end is connected with elbow that must be straight down, if angle assurance is not accurate, elbow will be tilted.That is,
Fixed effect between prior art large diameter pipe 1 ' and minor diameter pipe 2 ' and accurately angle control are difficult often to reach simultaneously
It is required that.In addition, the sealing of said structure is also poor, due to the presence of tolerance, the cooperation between screw thread is unable to reach percent
Hundred sealing.
Utility model content
The utility model provides the screw connection structure of liner two-phase stainless steel composite steel pipe, and its object is to overcome existing skill
The problem of potential difference seriously corroded and not good enough sealing property that art is present.
The technical solution of the utility model is as follows：
The screw connection structure of liner two-phase stainless steel composite steel pipe, including it is lined with the large diameter steel pipe of stainless steel layer and small straight
It is provided with footpath steel pipe, the connection end of large diameter steel pipe on internal thread, the inwall of large diameter steel pipe and is additionally provided with step surface, and internal thread
Extend inwardly to step surface position；The outer wall of minor-diameter steel-tube provided with the external screw thread coordinated, large diameter steel pipe with it is small straight
Footpath steel tube screw thread connection, the screw connection structure also includes the inner liner stainless steel set being inserted in advance in minor-diameter steel-tube and food
The paste adhesive layer of level, the inner liner stainless steel set is made up of the flanging of integrally formed cylindrical section and annular, described outer
Flange is located at one end of cylindrical section, and the external diameter of cylindrical section is less than the internal diameter of minor-diameter steel-tube, and the external diameter of flanging is more than minor diameter
The internal diameter of steel pipe；Partial cylinder section is stretched into minor-diameter steel-tube, and flanging is resisted against on step surface, and flanging and minor diameter
The pre- gap for remaining for depositing paste adhesive layer, is formed between the gap and the internal thread of large diameter steel pipe between the end face of steel pipe
One cavity；The paste adhesive layer full of in above-mentioned cavity, and be extruded into the coupling part of inside/outside screw thread, cylindrical section with it is small
Between gap and flanging and step surface between diameter steel pipe inner wall in space.
Further, the external diameter of the flanging and the external diameter of step surface are identical.
Further, the paste adhesive layer is epoxy glue layer.
From above-mentioned to description of the present utility model, compared to the prior art, the utility model has the following advantages that：
1st, paste adhesive layer can be extruded before uncured, and it flows and is filled in inner liner stainless steel set, minor-diameter steel-tube
And in the slight gap between large diameter steel pipe three, the real nothing between three is achieved that after the solidification of paste adhesive layer
Seam connection, set cooperation can prevent end face and the problem of step surface potential difference is corroded with inner liner stainless steel for it, so that effectively extension makes
Use the life-span.
2nd, paste adhesive layer can be extruded and into the coupling part of internal and external screw thread, so as to reach absolute sealing effectiveness.
3rd, the pre- gap for remaining for depositing paste adhesive layer between flanging and the end face of minor-diameter steel-tube, in the gap
Fixed effect is attained by length range, between minor-diameter steel-tube and large diameter steel pipe, this just gives minor-diameter steel-tube and big
Angle between diameter steel pipe provides enough adjustment spaces, when needing adjustment angle, can be by minor-diameter steel-tube and straight greatly
Feeding depth between the steel pipe of footpath further increases.
4th, the screw connection structure of the utility model liner two-phase stainless steel composite steel pipe, can be applied not only to common family's life
Detachable collar domain and it can also be applied in industrial production, with extremely wide market prospects.
Brief description of the drawings
Fig. 1 is the structural representation of prior art.
Fig. 2 is structural representation when the utility model is not filled by paste adhesive layer.
Fig. 3 is the enlarged diagram of part A in Fig. 2.
Fig. 4 is the structural representation after filling paste adhesive layer.
Embodiment
Illustrate embodiment of the present utility model with reference to the accompanying drawings.
Referring concurrently to Fig. 2, Fig. 3 and Fig. 4, the screw connection structure of liner two-phase stainless steel composite steel pipe, including it is lined with stainless
The large diameter steel pipe 1 of steel layer 3, the minor-diameter steel-tube 2 for being lined with stainless steel layer 3, inner liner stainless steel set 4 and paste adhesive layer 5,
The paste of this in actual production adhesive layer 5 is usually epoxy glue layer.Internal thread 11 is provided with the connection end of large diameter steel pipe 1,
Step surface 12 is additionally provided with the inwall of large diameter steel pipe 1, and internal thread 11 extends inwardly to the position of step surface 12；Minor diameter
The outer wall of steel pipe 2 can pass through internal and external screw thread 11,21 provided with the external screw thread 21 coordinated, large diameter steel pipe 1 with minor-diameter steel-tube 2
It is attached.The inner liner stainless steel set 4 is made up of the flanging 42 of integrally formed cylindrical section 41 and annular, described to turn up
Side 42 is located at one end of cylindrical section 41, and the external diameter of cylindrical section 41 is less than the internal diameter of minor-diameter steel-tube 2, and the external diameter of flanging 42 is more than
The internal diameter of minor diameter pipe 2, the external diameter of flanging 42 is identical with the external diameter of step surface 12 under normal circumstances.Partial cylinder section 41 is stretched into
Remain for depositing paste adhesive layer 5 in advance in minor-diameter steel-tube 2, and between the end face 22 of flanging 42 and minor-diameter steel-tube 2
A cavity 6 is formed between the internal thread 11 of gap, the gap and large diameter steel pipe 1；The paste adhesive layer 5 is full of above-mentioned cavity
In 6, and it is extruded into space and inside and outside between the coupling part of inside/outside screw thread 11,21, flanging 42 and step surface 12
The coupling part of screw thread 11,21.
During installation, first the part of cylindrical section 41 that inner liner stainless steel covers 4 is stretched into minor-diameter steel-tube 2, then exposed to
A certain amount of paste adhesive layer 5 is spread on the circumference of the cylindrical section 41 of minor-diameter steel-tube 2, then again by minor-diameter steel-tube 2 gradually
Screw in large diameter steel pipe 1, with the increase of feeding depth, flanging 42 can be resisted against on step surface 12, with feeding depth
Continuous increase, paste adhesive layer 5 first can be full of whole cavity 6, be then extruded again, and can gradually penetrate into inside/outside screw thread
11st, between 21 coupling part, flanging 42 and step surface 12 between space and cylindrical section 41 and the inwall of minor-diameter steel-tube 2
Gap, when minor-diameter steel-tube 2 needs to adjust the angle between large diameter steel pipe 1, can further increase feeding depth, until
Predetermined angle is reached, finally the connection of large diameter steel pipe 1 and minor-diameter steel-tube 2 just can be completed after paste adhesive layer 5 solidifies.
Embodiment of the present utility model is above are only, but design concept of the present utility model is not limited thereto,
All changes for carrying out unsubstantiality to the utility model using this design, belong to invade the row of the utility model protection domain
For.
Claims (3)
1. the screw connection structure of liner two-phase stainless steel composite steel pipe, including it is lined with the large diameter steel pipe and minor diameter of stainless steel layer
Internal thread is provided with steel pipe, the connection end of large diameter steel pipe, step surface is additionally provided with the inwall of large diameter steel pipe, and internal thread to
Inside extend to step surface position；The outer wall of minor-diameter steel-tube is provided with the external screw thread coordinated, large diameter steel pipe and minor diameter
Steel tube screw thread is connected, it is characterised in that：The liner that the screw connection structure also includes being inserted in advance in minor-diameter steel-tube is stainless
The paste adhesive layer of steel bushing and food-grade, the inner liner stainless steel set by integrally formed cylindrical section and annular flanging group
Into the flanging is located at one end of cylindrical section, and the external diameter of cylindrical section is less than the internal diameter of minor-diameter steel-tube, and the external diameter of flanging is big
In the internal diameter of minor-diameter steel-tube；Partial cylinder section is stretched into minor-diameter steel-tube, and flanging is resisted against on step surface, and flanging
The internal thread of the pre- gap for remaining for depositing paste adhesive layer between the end face of minor-diameter steel-tube, the gap and large diameter steel pipe
Between form a cavity；The paste adhesive layer is full of in above-mentioned cavity, and is extruded into the coupling part of inside/outside screw thread, circle
Between gap and flanging and step surface between cylinder section and minor-diameter steel-tube inwall in space.
2. the screw connection structure of liner two-phase stainless steel composite steel pipe according to claim 1, it is characterised in that：It is described to turn up
The external diameter on side is identical with the external diameter of step surface.
3. the screw connection structure of liner two-phase stainless steel composite steel pipe according to claim 1 or 2, it is characterised in that：It is described
Paste adhesive layer is epoxy glue layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720150289.4U CN206617673U (en) | 2017-02-20 | 2017-02-20 | The screw connection structure of liner two-phase stainless steel composite steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720150289.4U CN206617673U (en) | 2017-02-20 | 2017-02-20 | The screw connection structure of liner two-phase stainless steel composite steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206617673U true CN206617673U (en) | 2017-11-07 |
Family
ID=60231114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720150289.4U Expired - Fee Related CN206617673U (en) | 2017-02-20 | 2017-02-20 | The screw connection structure of liner two-phase stainless steel composite steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206617673U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108889859A (en) * | 2018-08-22 | 2018-11-27 | 江苏众信绿色管业科技有限公司 | A kind of steel lining stainless steel internal thread tube piece combined-machining equipment |
-
2017
- 2017-02-20 CN CN201720150289.4U patent/CN206617673U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108889859A (en) * | 2018-08-22 | 2018-11-27 | 江苏众信绿色管业科技有限公司 | A kind of steel lining stainless steel internal thread tube piece combined-machining equipment |
| CN108889859B (en) * | 2018-08-22 | 2024-03-12 | 江苏众信绿色管业科技有限公司 | Composite processing equipment for stainless steel internal thread pipe fitting with steel lining |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206617673U (en) | The screw connection structure of liner two-phase stainless steel composite steel pipe | |
| CN107387922A (en) | A kind of seal for pipe joints connector | |
| CN108458173A (en) | The screw connection structure of liner two-phase stainless steel composite steel pipe | |
| CN204647619U (en) | Anticorrosion composite pipe connects special welding flanged joint | |
| CN204493936U (en) | The joint connecting structure of anticorrosion composite pipe | |
| CN205298896U (en) | High pressure hydraulic system hard tube coupling assembling | |
| US20090224537A1 (en) | Brake tube end flare | |
| CN204164527U (en) | A kind of welding type pipe fitting joint applying double-lip sealing ring | |
| CN204164528U (en) | A kind of welding type pipe fitting joint applying single lip sealing ring | |
| CN202302525U (en) | Novel polyethylene steel-plastic transition pipe fitting | |
| CN203656411U (en) | Double-rubber-ring bell and spigot steel ring of large-diameter PCCP (prestressed concrete cylinder pipe) and large-diameter PCCP | |
| CN213088974U (en) | Water stopping device for pipe well joint | |
| CN204127536U (en) | A kind of stainless steel ripple hose coupling hard sealing structure | |
| CN107191700A (en) | Oil connection | |
| CN207864829U (en) | A kind of sliceable composite pipe structure of architectural engineering | |
| CN207514438U (en) | A kind of wear-resisting carbon steel pipe fitting joint | |
| CN205037028U (en) | Anti -corrosion pipeline | |
| CN204942777U (en) | Seamless ventilation duct | |
| CN204986088U (en) | Operation pump business turn over hydraulic fluid port and connection structure who moves rotating -barrel way | |
| CN205350702U (en) | Awl metal to metal closed angle sealing end coupling | |
| CN211344306U (en) | Compound transport pipe sealing joint and compound transport pipe | |
| CN205298897U (en) | Weld flange | |
| CN105570589B (en) | A kind of more logical hydraulic fitting connection structures | |
| CN208935607U (en) | A kind of large-bore plastics pipe flange | |
| JP3228518U (en) | Fluid pipeline assembly that can prevent overflow |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |