CN205226757U - A positive left -hand thread ferrule connection structure for interior outer anti -corrosion pipeline - Google Patents
A positive left -hand thread ferrule connection structure for interior outer anti -corrosion pipeline Download PDFInfo
- Publication number
- CN205226757U CN205226757U CN201521081999.3U CN201521081999U CN205226757U CN 205226757 U CN205226757 U CN 205226757U CN 201521081999 U CN201521081999 U CN 201521081999U CN 205226757 U CN205226757 U CN 205226757U
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- hand thread
- positive left
- pipeline
- steel pipe
- pipe collar
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The utility model belongs to the technical field of anticorrosion pipeline connects, especially, relate to a positive left -hand thread ferrule connection structure for interior outer anti -corrosion pipeline, including the steel pipe, the outside of steel pipe is by outer to interior plastics protective housing and the modified asphalt anticorrosive coating of being equipped with in proper order, and the inboard of steel pipe is provided with interior anticorrosive coating, still includes positive left -hand thread ferrule, each welding of both ends of steel pipe have a male joint, interior anticorrosive coating extend to and cover the inner wall of male joint, the outside of two male joints on steel pipe is provided with respectively soon to opposite screw thread, the inboard of positive left -hand thread ferrule also be provided with soon to opposite screw, passing through between male joint and the positive left -hand thread ferrule threaded connection, connect through positive left -hand thread ferrule between pipeline and the pipeline, the outside of positive left -hand thread ferrule is provided with outer repaired mouth anticorrosive coating. The utility model discloses can not destroy the interior anticorrosive coating of pipeline to improve pipeline life, practiced thrift manufacturing cost.
Description
Technical field
The utility model belongs to anti-corrosion pipeline interconnection technique field, particularly relates to a kind of positive left-hand thread pipe collar linkage structure for internal and external anti-corrosive pipeline.
Background technique
At present, when city discharge pipe network, oil field oil transportation, the construction of water filling small-bore (∮ less than 219) pipeline field, all adopt the Placement of electric welding between pipeline and pipeline, after pipeline connects, the interior anticorrosive coat of weld is all seriously damaged, and cannot repair, define anticorrosion tomography in insides of pipes, concerning whole piece conveyance conduit, just be equal to nothing interior anticorrosion, have a strong impact on the design service life of conveyance conduit, shortened pipeline life cycle, add cost of production.
Summary of the invention
The utility model provides a kind of positive left-hand thread pipe collar linkage structure for internal and external anti-corrosive pipeline can not destroying pipeline internal corrosion layer, can destroy the problem of pipeline internal corrosion layer during to solve the employing welding manner connecting tube proposed in above-mentioned background technology.
The technical problem that the utility model solves realizes by the following technical solutions: the utility model provides a kind of positive left-hand thread pipe collar linkage structure for internal and external anti-corrosive pipeline, comprise steel pipe, the outside of steel pipe is provided with plastic protection casing and modified pitch anticorrosive coat from outside to inside successively, the inner side of steel pipe is provided with interior anticorrosive coat, also comprise positive left-hand thread pipe collar, the two ends of described steel pipe are respectively welded with a tool joint pin, described interior anticorrosive coat extends to and covers the inwall of tool joint pin, the outside of two tool joint pins on a steel pipe is respectively arranged with the contrary screw thread of rotation direction, the inner side of described positive left-hand thread pipe collar is also provided with the contrary screw thread of rotation direction, be threaded by described between tool joint pin with positive left-hand thread pipe collar, connected by positive left-hand thread pipe collar between pipeline and pipeline, the arranged outside of positive left-hand thread pipe collar has outlet anticorrosive coat.
Described screw-thread fit face scribbles preserving and sealing glue.Described outlet anticorrosive coat covers positive left-hand thread pipe collar and the weld seam between steel pipe and tool joint pin completely.
The beneficial effects of the utility model are: the welding connecting mode of employing when the utility model has abandoned existing pipeline connection construction, then adopt positive left-hand thread pipe collar to connect.Such Placement can not produce welding high temperature, therefore can not destroy the interior anticorrosive coat of pipeline, and then ensure that the continuity of pipeline internal corrosion layer, give full play to the antisepsis of pipeline internal corrosion layer, improves pipeline working life, has saved cost of production.Also the problem that current small-bore internal coat pipeline is welded to connect rear damage buckle up difficulty is solved.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: anticorrosive coat in 1-, 2-modified pitch anticorrosive coat, 3-outlet anticorrosive coat, 4-tool joint pin, the positive left-hand thread pipe collar of 5-, 6-plastic protection casing, 7-steel pipe.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
The utility model comprises steel pipe 7, and the outside of steel pipe 7 is provided with plastic protection casing 6 and modified pitch anticorrosive coat 2 from outside to inside successively, and the inner side of steel pipe 7 is provided with interior anticorrosive coat 1, also comprises positive left-hand thread pipe collar 5, and the two ends of described steel pipe 7 are respectively welded with a tool joint pin 4.Described interior anticorrosive coat 1 extends to and covers the inwall of tool joint pin 4, continuous to ensure interior corrosion-resistant.The outside of two tool joint pins 4 on a steel pipe 7 is respectively arranged with the contrary screw thread of rotation direction, and the inner side of described positive left-hand thread pipe collar 5 is also provided with the contrary screw thread of rotation direction, is threaded between tool joint pin 4 with positive left-hand thread pipe collar 5 by described.Connected by positive left-hand thread pipe collar 5 between pipeline and pipeline, because the thread rotary orientation inside positive left-hand thread pipe collar 5 is contrary, make only to need to rotate positive left-hand thread pipe collar 5 when connecting, and do not need to rotate heavy pipeline, therefore connect operation very laborsaving, quick.The arranged outside of positive left-hand thread pipe collar 5 has outlet anticorrosive coat 3.
Described screw-thread fit face scribbles preserving and sealing glue, further obviates anticorrosion short slab.
Described outlet anticorrosive coat 3 covers positive left-hand thread pipe collar 5 and the weld seam between steel pipe 7 and tool joint pin 4 completely, outlet anticorrosive coat 3 is connected with plastic protection casing 6, ensure that the continuity of pipeline external anti-corrosion layer.
When manufacturing the utility model, pipeline corrosion protection factory do steel pipe 7 internal and external anti-corrosive prefabricated before, first ready-made being welded on through antiseptic tool joint pin 4 to be done corrosion-resistant steel pipe 7 two ends, then internal and external anti-corrosive is done to steel pipe 7; After the internal and external anti-corrosive of steel pipe 7 is finished, the screw thread of the tool joint pin 4 at steel pipe 7 two ends overlaps protecting sleeve for thread, stacks on request.
When site operation connects, only need pipe laying is good, lay down protecting sleeve for thread, screw thread is coated preserving and sealing glue, with positive left-hand thread pipe collar 5 two pipelines are tightened and link together.
The utility model adopt Placement at the scene connection construction time need not weld, therefore can not destroy the interior anticorrosive coat 1 of pipeline, and then ensure that the continuity of pipeline internal corrosion layer 1, give full play to the antisepsis of pipeline internal corrosion layer 1, improve pipeline working life, save cost of production.Also the problem that current small-bore internal coat pipeline is welded to connect rear damage buckle up difficulty is solved.
Claims (3)
1. the positive left-hand thread pipe collar linkage structure for internal and external anti-corrosive pipeline, comprise steel pipe (7), the outside of steel pipe (7) is provided with plastic protection casing (6) and modified pitch anticorrosive coat (2) from outside to inside successively, the inner side of steel pipe (7) is provided with interior anticorrosive coat (1), it is characterized in that: also comprise positive left-hand thread pipe collar (5), the two ends of described steel pipe (7) are respectively welded with a tool joint pin (4), described interior anticorrosive coat (1) extends to and covers the inwall of tool joint pin (4), the outside of two tool joint pins (4) on a steel pipe (7) is respectively arranged with the contrary screw thread of rotation direction, the inner side of described positive left-hand thread pipe collar (5) is also provided with the contrary screw thread of rotation direction, be threaded by described between tool joint pin (4) with positive left-hand thread pipe collar (5), connected by positive left-hand thread pipe collar (5) between pipeline and pipeline, the arranged outside of positive left-hand thread pipe collar (5) has outlet anticorrosive coat (3).
2. a kind of positive left-hand thread pipe collar linkage structure for internal and external anti-corrosive pipeline according to claim 1, is characterized in that: described screw-thread fit face scribbles preserving and sealing glue.
3. a kind of positive left-hand thread pipe collar linkage structure for internal and external anti-corrosive pipeline according to claim 1, is characterized in that: described outlet anticorrosive coat (3) covers positive left-hand thread pipe collar (5) and the weld seam between steel pipe (7) and tool joint pin (4) completely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521081999.3U CN205226757U (en) | 2015-12-23 | 2015-12-23 | A positive left -hand thread ferrule connection structure for interior outer anti -corrosion pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521081999.3U CN205226757U (en) | 2015-12-23 | 2015-12-23 | A positive left -hand thread ferrule connection structure for interior outer anti -corrosion pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205226757U true CN205226757U (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521081999.3U Active CN205226757U (en) | 2015-12-23 | 2015-12-23 | A positive left -hand thread ferrule connection structure for interior outer anti -corrosion pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205226757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025967A (en) * | 2018-08-31 | 2018-12-18 | 黑龙江省易爱蒽新材料科技发展有限公司 | A kind of portable, anti-lost, fast de-, blowout prevention pipe device |
-
2015
- 2015-12-23 CN CN201521081999.3U patent/CN205226757U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025967A (en) * | 2018-08-31 | 2018-12-18 | 黑龙江省易爱蒽新材料科技发展有限公司 | A kind of portable, anti-lost, fast de-, blowout prevention pipe device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |