CN202955390U - Bending-connection steel-plastic composite pipe with internal thread insert - Google Patents
Bending-connection steel-plastic composite pipe with internal thread insert Download PDFInfo
- Publication number
- CN202955390U CN202955390U CN 201220720135 CN201220720135U CN202955390U CN 202955390 U CN202955390 U CN 202955390U CN 201220720135 CN201220720135 CN 201220720135 CN 201220720135 U CN201220720135 U CN 201220720135U CN 202955390 U CN202955390 U CN 202955390U
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- Prior art keywords
- pipe
- steel
- plastic composite
- internal thread
- plastic
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- Expired - Fee Related
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Abstract
The utility model discloses a bending-connection steel-plastic composite pipe with an internal thread insert. The pipe comprises a bend, wherein a steel-plastic composite pipe on which a steel pipe is compounded is connected to one end of the bend; a coaxial ring-shaped concave hole is formed in the wall at one end of the bend; the steel-plastic composite pipe is embedded in the ring-shaped concave hole; and the insert with an internal thread is connected to the other end of the bend through injection molding. According to the utility model, as the coaxial ring-shaped concave hole in the wall of the bend is connected with the steel-plastic composite pipe in an embedded fitting manner, the steel-plastic composite pipe is in close fit with the bend, fitting gaps are avoided, and the strength of welding connection is improved.
Description
Technical field
The utility model relates to a kind of composite metal plastic pipe, relates in particular to the curved composite metal plastic pipe that connects formula band internal thread down part.
Background technique
Composite metal plastic pipe forms steel-plastic composite pipe and is connected and composed by joint by composite steel tube in the middle of plastic tube, because the steel pipe in tubing mesosphere is airtight, so this Steel-plastic pipeline has the effect of resistance oxygen simultaneously, can be directly used in direct drinking water project, and its internal and external layer is plastic material, there is extraordinary corrosion resistance.So good performance, make the purposes of composite metal plastic pipe very extensive, oil, natural gas transport, and the work pipes for mining, water drinking tube, the figure of this pipe all can be seen in the various fields of waste pipe etc.The current metallic character that is connected the general using steel pipe of its joint of composite metal plastic pipe and steel-plastic composite pipe, the technological deficiency such as by electromagnetic welding, although this kind of welding mode welding effect is better, also have that the welding end is overflowed, local hole, join strength are poor.As technical order internal thread down part, it is tapped down part.
Chinese invention patent number of patent application 201010188512.7 discloses a kind of electromagnetic inductive welding method of steel-plastic compound pipe, it first inserts steel-plastic composite pipe in the birdsmouth of pipe fitting, with electromagnetic induction heater, the steel pipe layer of the steel-plastic composite pipe of plugging position is carried out afterwards the plastics of electromagnetic induction heating melting steel pipe layer both sides, the last cooling welding that realizes steel-plastic composite pipe and pipe fitting.The method of the technological deficiencies such as this kind of welding process do not propose how to solve that above-mentioned welding end is overflowed, local hole, join strength are poor.
Summary of the invention
The utility model provides the smooth welding hole attractive in appearance, inner of a kind of steel-plastic composite pipe and joint welding end few, the curved composite metal plastic pipe that connects formula band internal thread down part that join strength is good.
A kind of curved composite metal plastic pipe that connects formula band internal thread down part, comprise bend pipe, bend pipe one end connects the steel-plastic composite pipe that is compounded with steel pipe, described bend pipe one end tube wall is provided with coaxial annular shrinkage pool, the annular shrinkage pool is embedded in steel-plastic composite pipe, and the injection moulding of the bend pipe the other end connects tapped down part and is convenient to connect other pipelines.This kind is by the annular shrinkage pool coaxial with the bend pipe tube wall, the embedded steel-plastic composite pipe that is connected, realize steel-plastic composite pipe radially with the closely cooperating of bend pipe, prevent and coordinate space, improve the intensity that welding connects, electromagnetic induction heater carries out the plastics of electromagnetic induction heating melting steel pipe both sides to the steel pipe of steel-plastic composite pipe, the last cooling welding that realizes steel-plastic composite pipe and bend pipe.Owing to first steel-plastic composite pipe being embedded in annular shrinkage pool, then to the connection part heat welded, easy to implement, manufacture.
The described annular shrinkage pool outside is provided with the stuffing box gland of socket steel-plastic composite pipe, stuffing box gland, bend pipe, the welding of steel-plastic composite pipe three mutual electromagnetic, effectively avoid overflowing of molten plastic in the steel-plastic composite pipe by the stuffing box gland structure, improved the aesthetics of product.Described annular shrinkage pool is that the conical surface is connected with the stuffing box gland junction surface, the junction surface end is provided with bending, annular shrinkage pool and stuffing box gland are fastened and connected mutually in bending place, this kind of conical surface linkage structure increased greatly and has been in contact with one another area, improve and connect fastness, the technological scheme mutually be fastened and connected in bending place on the other hand makes the relative steel-plastic composite pipe of stuffing box gland and bend pipe have an inside tightening force, has increased the compactness in the fusion process, prevents the technological deficiencies such as welding pore.
On described bend pipe body, corresponding steel-plastic composite pipe embeds annular shrinkage pool and partly is provided with more than one exhaust port, is beneficial to discharge the plastics that impact connects the gas of fastness or holds melting.
The utility model is by the annular shrinkage pool coaxial with the bend pipe tube wall, the embedded steel-plastic composite pipe that is connected, realize steel-plastic composite pipe radially with the closely cooperating of bend pipe, prevent and coordinate space, improve the intensity that welding connects.
The accompanying drawing explanation
Figure 1 shows that the curved composite metal plastic pipe master who connects formula band internal thread down part of the utility model looks the sectional structure schematic diagram.
Embodiment
A kind of curved composite metal plastic pipe that connects formula band internal thread down part as shown in Figure 1, comprise bend pipe 1, bend pipe 1 one ends connect the steel-plastic composite pipe 2 that is compounded with steel pipe 4, bend pipe 1 one end tube walls are provided with coaxial annular shrinkage pool, the annular shrinkage pool is embedded in steel-plastic composite pipe 2, and bend pipe 1 the other end injection moulding connects tapped down part 6.The annular shrinkage pool outside is provided with the stuffing box gland 3 of socket steel-plastic composite pipe 2, stuffing box gland 3, bend pipe 1, steel-plastic composite pipe 2 three's mutual electromagnetic weldings.On bend pipe 1 body, corresponding steel-plastic composite pipe 2 embeds annular shrinkage pool and partly is provided with more than one exhaust port 5.
As the preferred annular shrinkage pool of structure and stuffing box gland 3 junction surfaces, be that the conical surface is connected, the junction surface end is provided with bending, and annular shrinkage pool and stuffing box gland 3 are fastened and connected mutually in bending place.
Quantity or arrangement as exhaust port 5 can axially or radially all be uniformly distributed 2 or 4 or 6 or 8 along bend pipe 1 as required.
Claims (4)
1. a curved composite metal plastic pipe that connects formula band internal thread down part, comprise bend pipe (1), bend pipe (1) one end connects the steel-plastic composite pipe (2) that is compounded with steel pipe (4), it is characterized in that: described bend pipe (1) one end tube wall is provided with coaxial annular shrinkage pool, the annular shrinkage pool is embedded in steel-plastic composite pipe (2), and bend pipe (1) the other end injection moulding connects tapped down part (6).
2. the curved composite metal plastic pipe that connects formula band internal thread down part as claimed in claim 1, it is characterized in that: the described annular shrinkage pool outside is provided with the stuffing box gland (3) of socket steel-plastic composite pipe (2), stuffing box gland (3), bend pipe (1), the welding of steel-plastic composite pipe (2) three's mutual electromagnetic.
3. the curved composite metal plastic pipe that connects formula band internal thread down part as claimed in claim 2, it is characterized in that: described annular shrinkage pool is that the conical surface is connected with stuffing box gland (3) junction surface, the junction surface end is provided with bending, and annular shrinkage pool and stuffing box gland (3) are fastened and connected mutually in bending place.
4. the curved composite metal plastic pipe that connects formula band internal thread down part as claimed in claim 1, it is characterized in that: on described bend pipe (1) body, corresponding steel-plastic composite pipe (2) embeds annular shrinkage pool and partly is provided with more than one exhaust port (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220720135 CN202955390U (en) | 2012-12-05 | 2012-12-05 | Bending-connection steel-plastic composite pipe with internal thread insert |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220720135 CN202955390U (en) | 2012-12-05 | 2012-12-05 | Bending-connection steel-plastic composite pipe with internal thread insert |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202955390U true CN202955390U (en) | 2013-05-29 |
Family
ID=48460962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220720135 Expired - Fee Related CN202955390U (en) | 2012-12-05 | 2012-12-05 | Bending-connection steel-plastic composite pipe with internal thread insert |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202955390U (en) |
-
2012
- 2012-12-05 CN CN 201220720135 patent/CN202955390U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20131205 |