CN101430036A - Steel-plastic composite pipe connection structure and connector - Google Patents
Steel-plastic composite pipe connection structure and connector Download PDFInfo
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- CN101430036A CN101430036A CNA200810122311XA CN200810122311A CN101430036A CN 101430036 A CN101430036 A CN 101430036A CN A200810122311X A CNA200810122311X A CN A200810122311XA CN 200810122311 A CN200810122311 A CN 200810122311A CN 101430036 A CN101430036 A CN 101430036A
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Abstract
A composite metal plastic pipe connection structure and a connecting piece thereof; the connecting piece comprises a composite metal plastic pipe connecting piece main body which is provided with cast steel at the outer layer and plastic at the inner layer, a sealing ring and a T tubular expansion fastener; wherein, a straight pipe section of the a T tubular expansion fastener is inserted and fixed in a composite metal plastic pipe in an expanding way, a ring surface is covered on the end surface of an interface of the composite metal plastic pipe, the composite metal plastic pipe connecting piece main body is composed of a joint pipe and a hole enlargement interface part, the inner peripheral surface of which is provided with internal thread matched with external thread at the end part of the composite metal plastic pipe, and the sealing ring is arranged between a lug boss at the bottom in the hole enlargement interface part of the composite metal plastic pipe connecting piece main body and the ring surface of the T tubular expansion fastener at the end part of the composite metal plastic pipe. The invention has simple structure, convenient connection and installation as well as good sealability; meanwhile, the T tubular expansion fasteners arranged at the two ports of the composite metal plastic pipe also can avoid the plastic layer of the composite metal plastic pipe dropping off, thereby effectively preventing the pipeline from being eroded, prolonging the service life and improving the safety of the running of the pipeline.
Description
Technical field
The present invention relates to a kind of pipe connecting structure and connection pipe fitting.
Background technique
At present, the steel-plastic composite pipe pipeline connects usually, and employing is connected similar structure and pipe connector with the common steel tube pipeline, just the pipe connector inwall of steel-plastic composite pipe is lined with plastic layer, and the joining part that this inwall plastic layer also is provided with internal thread to pipe connector is extended the tube circle, constitute the annular space of accepting of steel-plastic composite pipe threaded coupling portion between this circle and the joining part internal thread, be equipped with seal washer at the root of annular space.Above-mentioned steel-plastic composite pipe pipe joint is simple in structure, and it is convenient to use, and the shortcoming that exists is reliable inadequately to the seal protection of end face of steel-plastic composite tube.Because in attended operation, if connecting thread spins not in place, the steel-plastic composite pipe front-end face can not be adjacent to closely and be positioned at the seal washer that pipe connector is accepted the annular space root, then the circulation medium in the pipe will infiltrate from annular space and contact with end face of steel-plastic composite tube, cause the corrosion of end face steel pipe, and circulation medium also can infiltrate the interface of steel pipe and plastic layer gradually, causes steel to mould cohesive force and descends, and influences pipeline working life and security of operation.
Summary of the invention
Purpose of the present invention, be for the steel-plastic composite pipe pipeline provide a kind of simple in structure, easy for installation, connect reliable linkage structure of sealingly secure and link.
Technical solution of the present invention is: steel-plastic composite pipe connection structure comprises the outer steel that is, internal layer is that the steel-plastic composite pipe and the skin of plastics is cast steel, internal layer is the steel-plastic composite pipe fitting main body of plastics, described steel-plastic composite pipe fitting main body is made of pipe joint and hole enlargement joining part, its inner plastic is laid on the bottom boss in the inwall of pipe joint and the hole enlargement joining part, hole enlargement joining part inner peripheral surface is provided with the internal thread that matches with the outside thread of steel-plastic composite pipe end, the connecting port of steel-plastic composite pipe is equipped with the tubular expansion fastener of T, the straight length of the tubular expansion fastener of this T inserts in the steel-plastic composite pipe, the circle face covers on the steel-plastic composite pipe interface end face, and solid by casing roller expansion, between steel-plastic composite pipe interface end end face behind the tubular expansion fastener of installation T and the bottom boss in the steel-plastic composite pipe fitting main body joining part seal washer is installed.
The link of steel-plastic composite pipe connection structure, comprise the outer cast steel that is, internal layer is the steel-plastic composite pipe fitting main body and the seal ring of plastics, it also comprises the tubular expansion fastener of T, the straight length of the tubular expansion fastener of described T can insert in the steel-plastic composite pipe, the circle face covers on the steel-plastic composite pipe interface end face, and it is solid by casing roller expansion, described steel-plastic composite pipe fitting main body is made of pipe joint and hole enlargement joining part, its inner plastic is laid on the bottom boss in the inwall of pipe joint and the hole enlargement joining part, hole enlargement joining part inner peripheral surface is provided with the internal thread that matches with the outside thread of steel-plastic composite pipe end, and described seal washer is arranged between the tubular expansion fastener circle of the T face of interior bottom boss of steel-plastic composite pipe fitting main body hole enlargement joining part and steel-plastic composite pipe end.
The present invention is simple in structure, connection is convenient, good seal performance, can completely cut off the interior circulation medium of pipe reliably contacts with the steel structure position of pipeline, simultaneously, the tubular expansion fastener of T that steel-plastic composite pipe two ends oral area is installed can also avoid the plastic layer of steel-plastic composite pipe to come off, thereby effectively prevents corrosive pipeline, prolong pipeline working life, improve the pipeline safety in operation.
Description of drawings
Fig. 1 is the steel-plastic composite pipe connection structure schematic representation.
Fig. 2 is the pipe connector agent structure schematic representation of one of steel-plastic composite pipe pipe joint.
Embodiment
The invention will be further described with embodiment below in conjunction with accompanying drawing.
Steel-plastic composite pipe 1 is meant that outer 2 is that steel, internal layer 3 are the composite pipe of plastics.The steel-plastic composite pipe pipe joint comprises that outer 5 is that cast steel, internal layer 6 are the tubular expansion fastener 8 of steel-plastic composite pipe fitting main body 4, seal washer 7 and T of plastics.Described steel-plastic composite pipe fitting main body 4 is made of pipe joint 13 and hole enlargement joining part 12, its inner plastic is laid on the bottom boss 14 in the inwall of pipe joint 13 and the hole enlargement joining part 12, hole enlargement joining part 12 inner peripheral surfaces are provided with the internal thread 11 that matches with the outside thread 10 of steel-plastic composite pipe 1 end, and the outside thread 10 of described steel-plastic composite pipe 1 end preferably adopts cylindrical tube screw thread or ordinary straight screw thread with the internal thread 11 of steel-plastic composite pipe fitting main body hole enlargement joining part 12.That described steel-plastic composite pipe fitting main body 4 can be made is straight-through, threeway, four-way, curved head body etc.Described seal washer 7 is installed on the interior bottom boss 14 of steel-plastic composite pipe fitting main body hole enlargement joining part.The tubular expansion fastener 8 of T adopts stainless steel material to make, its straight length can insert in the steel-plastic composite pipe 1, the circle face covers on the steel-plastic composite pipe 1 interface end face, for make the tubular expansion fastener 8 of T and steel-plastic composite pipe 1 inwall more the close and firm button that expands combine, on the straight length outer circumferential face of the tubular expansion fastener 8 of T, offer some circumferential seal grooves 9.
When the steel-plastic composite pipe pipeline connects construction, earlier the straight length of the tubular expansion fastener 8 of T is inserted an end port of steel-plastic composite pipe 1, and the circle face that makes expansion fastener covers on the steel-plastic composite pipe interface end face, use the tube expander swelling pressure then, the tubular expansion fastener 8 of T is combined with steel-plastic composite pipe 1 port part close and firm, so the steel-plastic composite pipe fitting main body 4 of having put seal washer 7 on the end boss in it can be spun mutually with steel-plastic composite pipe 1 interface end of the tubular expansion fastener 8 of the above-mentioned T of installing, spin in the operation as far as possible and put in place, guaranteeing that seal washer 7 is in is subjected to impaction state, at this moment, promptly finished the connection of steel-plastic composite pipe pipeline one end reliably, same operation can be finished the connection of the steel-plastic composite pipe pipeline the other end easily.
Claims (9)
1, a kind of steel-plastic composite pipe connection structure, comprise the outer steel that is, internal layer is that the steel-plastic composite pipe (1) and the skin of plastics is cast steel, internal layer is the steel-plastic composite pipe fitting main body (4) of plastics, it is characterized in that steel-plastic composite pipe fitting main body (4) is made of pipe joint (13) and hole enlargement joining part (12), its inner plastic is laid on the bottom boss (14) in the inwall of pipe joint (13) and the hole enlargement joining part (12), hole enlargement joining part (12) inner peripheral surface is provided with the internal thread (11) that matches with the outside thread (10) of steel-plastic composite pipe (1) end, the connecting port of steel-plastic composite pipe (1) is equipped with the tubular expansion fastener of T (8), the straight length of the tubular expansion fastener of this T (8) inserts in the steel-plastic composite pipe (1), the circle face covers on steel-plastic composite pipe (1) the interface end face, and solid by casing roller expansion, between steel-plastic composite pipe (1) interface end end face behind the installation tubular expansion fastener of T (8) and the bottom boss (14) in the steel-plastic composite pipe fitting main body joining part seal washer (7) is installed.
2,, it is characterized in that offering some circumferential seal grooves (9) on the straight length outer circumferential face of the tubular expansion fastener of T (8) by the described steel-plastic composite pipe connection structure of claim 1.
3,, it is characterized in that steel-plastic composite pipe fitting main body (4) is straight-through or threeway, four-way, curved head body by the described steel-plastic composite pipe connection structure of claim 1.
4,, it is characterized in that the outside thread 10 of steel-plastic composite pipe 1 end and the internal thread 11 of steel-plastic composite pipe fitting main body hole enlargement joining part 12 are cylindrical tube screw thread or ordinary straight screw thread by the described steel-plastic composite pipe connection structure of claim 1.
5, a kind of steel-plastic composite pipe pipe connecting of steel-plastic composite pipe connection structure as claimed in claim 1, comprise the outer cast steel that is, internal layer is the steel-plastic composite pipe fitting main body (4) and the seal ring (7) of plastics, it is characterized in that it also comprises the tubular expansion fastener of T (8), the straight length of the tubular expansion fastener of described T (8) can insert in the steel-plastic composite pipe (1), the circle face covers on steel-plastic composite pipe (1) the interface end face, and it is solid by casing roller expansion, described steel-plastic composite pipe fitting main body (4) is made of pipe joint (13) and hole enlargement joining part (12), its inner plastic is laid on the bottom boss (14) in the inwall of pipe joint (13) and the hole enlargement joining part (12), hole enlargement joining part (12) inner peripheral surface is provided with the internal thread (11) that matches with the outside thread (10) of steel-plastic composite pipe (1) end, and described seal washer (7) is arranged between the tubular expansion fastener of T (8) the circle face of interior bottom boss (14) of steel-plastic composite pipe fitting main body hole enlargement joining part and steel-plastic composite pipe end.
6,, it is characterized in that offering some circumferential seal grooves (9) on the straight length outer circumferential face of the tubular expansion fastener of T (8) by the described steel-plastic composite pipe pipe connecting of claim 5.
7,, it is characterized in that steel-plastic composite pipe fitting main body (4) is straight-through or threeway, four-way, curved head body by the described steel-plastic composite pipe pipe connecting of claim 5.
8,, it is characterized in that the outside thread 10 of steel-plastic composite pipe 1 end and the internal thread 11 of steel-plastic composite pipe fitting main body hole enlargement joining part 12 are cylindrical tube screw thread or ordinary straight screw thread by the described steel-plastic composite pipe pipe connecting of claim 5.
9,, it is characterized in that the tubular expansion fastener of T (8) adopts stainless steel material to make by claim 5 or 6 described steel-plastic composite pipe pipe connectings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810122311XA CN101430036A (en) | 2008-11-08 | 2008-11-08 | Steel-plastic composite pipe connection structure and connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810122311XA CN101430036A (en) | 2008-11-08 | 2008-11-08 | Steel-plastic composite pipe connection structure and connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101430036A true CN101430036A (en) | 2009-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810122311XA Pending CN101430036A (en) | 2008-11-08 | 2008-11-08 | Steel-plastic composite pipe connection structure and connector |
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| Country | Link |
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| CN (1) | CN101430036A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799095A (en) * | 2010-04-09 | 2010-08-11 | 赵启林 | Method for connecting resin-based composite material tube and metal material |
| CN101852314A (en) * | 2010-03-12 | 2010-10-06 | 浙江金洲管道科技股份有限公司 | Steel-plastic composite pipe |
| CN101865339A (en) * | 2010-03-19 | 2010-10-20 | 浙江金洲管道科技股份有限公司 | Flange type steel-plastic composite pipe connecting structure and fabrication method thereof |
| CN102166802A (en) * | 2011-01-04 | 2011-08-31 | 哈尔滨飞机工业集团有限责任公司 | Method for sealing die parting surface by using silicone rubber tube |
-
2008
- 2008-11-08 CN CNA200810122311XA patent/CN101430036A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852314A (en) * | 2010-03-12 | 2010-10-06 | 浙江金洲管道科技股份有限公司 | Steel-plastic composite pipe |
| CN101865339A (en) * | 2010-03-19 | 2010-10-20 | 浙江金洲管道科技股份有限公司 | Flange type steel-plastic composite pipe connecting structure and fabrication method thereof |
| CN101799095A (en) * | 2010-04-09 | 2010-08-11 | 赵启林 | Method for connecting resin-based composite material tube and metal material |
| CN102166802A (en) * | 2011-01-04 | 2011-08-31 | 哈尔滨飞机工业集团有限责任公司 | Method for sealing die parting surface by using silicone rubber tube |
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Open date: 20090513 |