CN101021292A - Pipe end flared connection pipe - Google Patents
Pipe end flared connection pipe Download PDFInfo
- Publication number
- CN101021292A CN101021292A CN 200710027016 CN200710027016A CN101021292A CN 101021292 A CN101021292 A CN 101021292A CN 200710027016 CN200710027016 CN 200710027016 CN 200710027016 A CN200710027016 A CN 200710027016A CN 101021292 A CN101021292 A CN 101021292A
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- CN
- China
- Prior art keywords
- connecting tube
- pipe
- enlarging
- thermal shrinkage
- hot melt
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- 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.)
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- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The present invention relates to a connecting pipe whose pipe end is flared. It is characterized by that the end portion of said connecting pipe is equipped with a conical flaring, the outer wall of connecting end and inner and outer surfaces of flared portion are spray-coated with high-molecular material so as to form a protective layer.
Description
Technical field
The present invention relates to a kind of pipe fitting, particularly relate to a kind of manufacture method of indoor and outdoor connecting pipe spare of detachable air conditioner.
Background technique
It is class pipe fitting Placement commonly used that flared type connects.Pipe fitting end has the taper enlarging, and the pipeline that links to each other with pipe fitting or the end face that is connected of parts are the conical surface or sphere, with flange or nut pipe fitting and connecting end are tightened together during connection.The nut formula connects has outside thread at pipeline connecting end headband usually, and the nut that matches with the screw thread that is connected the termination is housed on the pipe fitting.In the pipeline pressure-bearing with when being in corrosive atmosphere, sealability and antiseptic property that enlarging connects are very important.Prior art adds seal ring to improve sealability in the joint, solve but the enlarging end face etching problem of pipe fitting is then very difficult.
The indoor and outdoor machine connecting pipeline of detachable air conditioner is exactly a kind of typical application.The ductility and the antiseptic property of copper are better, and existing connecting pipeline adopts copper pipe to make usually, all adopt flared type to be threaded with indoor set, outdoor unit.The connecting end of indoor set and outdoor unit is to have externally threaded copper fitting.Because the price of copper is very high, adopt low-cost tubing such as aluminum pipe, steel pipe to make the focus that connecting tube becomes research.In order to improve antiseptic property, can carry out electroplating processes to the surface of aluminum pipe or steel pipe.But enlarging end face coating is destroyed after the tubing enlarging, and will contact with the copper connecting end of indoor and outdoor machine, has serious end face corrosion.Salt spray test shows, will be connected with the indoor and outdoor machine termination with the air conditioner connecting pipe of Coating Steel Pipe processing, connects the end through rear tubular member enlarging in 500 hours and tangible corrosion occurs, can not satisfy the usage requirement of air conditioner.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, carries out technological improvement at the flared type connection of pipeline, and a kind of manufacture method of connecting tube of pipe end enlarging is provided.
The connecting tube of a kind of pipe end enlarging provided by the invention, the end of connecting tube has the taper enlarging, the inner and outer surface protective mulch of the outer wall of connecting end and flared section.
Described protective layer can be by spraying, hot dipping or other method outer wall and the flared section inner and outer surface application macromolecular material at connecting end.Described macromolecular material contains fluoro paraffin polymer or epoxy resin composition, as perfluor (ethylene, propylene) copolymer (FEP), polytetrafluoroethylene (PTFE), poly-perfluoroalkoxy resin (PFA).
Described protective layer also can be thermal shrinkage or hot melt sheath, and heating back jacket shrinkage or clinkering form protective layer at the outer wall and the flared section inner and outer surface of connecting end.
Described thermal shrinkage sheath can be made by the material that contains PVC or PETG or ethane-acetic acid ethyenyl ester or fluoro paraffin polymer or other thermal shrinkage plastic components.Described hot melt sheath also can be made by the material that contains polyamide or polyester or polyolefin or polyesteramide or other hot-melt plastic composition.Described thermal shrinkage or hot melt sheath can also be formed by the double layer material cow.It is characterized in that the skin of described double layer material is polyolefin or fluoro paraffin polymer, internal layer is a hot melt adhesive.The operating temperature that the initial shrinkage temperature of thermal shrinkage or hot melt sheath or softening point temperature are higher than connecting tube.
The connecting tube of aforesaid pipe end enlarging is to be made by aluminum pipe or steel pipe, and tube outer surface can cover zinc layer or aluminium zinc layer or other corrosion resistant coating.
Because the inner and outer surface in flared section all adopts the polymer protection layer to seal, can prevent moisture or other corrosive gas intrusion surface, adopt the connecting tube of this method protection all not have the erosion point through 1500 hours salt spray test tube walls, mouth of pipe expansion mouths.Simultaneously, the polymer protection layer of flared surfaces has also improved the sealability that connecting tube is connected with the indoor and outdoor machine Female connector fittings, can prevent system leak.
Compared with prior art, the connecting tube of pipe end enlarging provided by the present invention, the consumption of minimizing copper has reduced manufacturing cost of air conditioner, has to connect reliably sealing and the good advantage of antiseptic property.
Description of drawings
The present invention is further illustrated below in conjunction with the drawings and the specific embodiments:
Accompanying drawing 1: the structural representation one of air conditioner indoor and outdoor machine connecting tube assembly.
Accompanying drawing 2: the structural representation two of air conditioner indoor and outdoor machine connecting tube.
Embodiment
Embodiment one:
Fig. 1 is the structural representation of air conditioner indoor and outdoor machine connecting tube assembly in the present embodiment.
The connecting tube assembly comprises the connecting tube of being made by aluminum pipe (1), the Female connector fittings (2) at connecting tube two ends and the heat insulation sheath pipe (3) of connecting tube outsourcing.Connecting tube (1) is to be made by aluminum pipe, pipe outer wall electrophoretic process, and Female connector fittings (2) is to be made of copper, heat insulation sheath pipe (3) is to be made by polythene material.Between connecting tube assembly and indoor set subsidiary conduit, the outdoor unit stop valve by being threaded.
The two ends connecting end of indoor and outdoor machine connecting tube (1) has taper enlarging (4), so that match with the conical surface of the connecting end of indoor and outdoor machine.
The outer wall of connecting tube and the inner and outer surface of flared section cover the macromolecular material protective layer.Described polymeric coating layer is perfluor (ethylene, propylene) copolymer, is coated with and is contained in tube wall and flared section surface by soaking molding process, and coating thickness is 0.1～0.2 millimeter.
During connection Female connector fittings (2) and indoor and outdoor machine connecting end are tightened together.Described polymeric coating layer can not only improve the sealability that the nut formula connects, and the surface of taper enlarging is shielded with corrosive environment, does not all have the erosion point through 1500 hours salt spray test tube walls and mouth of pipe expansion mouth.
Embodiment two:
Fig. 2 is the structural representation of air conditioner indoor and outdoor machine connecting tube in the present embodiment.
Connecting tube comprises the connecting tube (5) made by steel pipe and the Female connector fittings at connecting tube two ends.The two ends connecting end of connecting tube (5) has taper enlarging (6), so that match with the conical surface of the connecting end of indoor and outdoor machine.
The two ends connecting end of connecting tube (5) is with thermal shrinkage sheath (7).Thermal shrinkage sheath (7) is formed by the double layer material cow, and skin is polyolefine material or poly-perfluoroalkoxy resin, and internal layer is a polyamide hot.The slightly larger in diameter of thermal shrinkage sheath (7) is enclosed within the connecting end of connecting tube (5) in the diameter of taper enlarging (6), and heating back jacket shrinkage forms protective layer on the surface of connecting end.
The connecting tube that present embodiment provided does not all have the erosion point through 1500 hours salt spray test tube walls and mouth of pipe expansion mouth.
Claims (10)
1, a kind of connecting tube of pipe end enlarging, the end of connecting tube has the taper enlarging, the inner and outer surface protective mulch of the outer wall of connecting end and flared section.
2, the connecting tube of pipe end enlarging according to claim 1, described protective layer are by spraying, hot dipping or other method outer wall and the flared section inner and outer surface application macromolecular material at connecting end.
3, macromolecular material according to claim 2 contains fluoro paraffin polymer or epoxy resin composition.
4, the connecting tube of pipe end enlarging according to claim 1, described protective layer are thermal shrinkage or hot melt sheath, and heating back jacket shrinkage or clinkering form protective layer at the outer wall and the flared section inner and outer surface of connecting end.
5, thermal shrinkage sheath according to claim 4 is made by the material that contains PVC or PETG or ethane-acetic acid ethyenyl ester or fluoro paraffin polymer or other thermal shrinkage plastic components.
6, hot melt sheath according to claim 4 is made by the material that contains polyamide or polyester or polyolefin or polyesteramide or other hot-melt plastic composition.
7, thermal shrinkage according to claim 4 or hot melt sheath are formed by the double layer material cow.It is characterized in that the skin of described double layer material is polyolefin or fluoro paraffin polymer, internal layer is a hot melt adhesive.
8, the operating temperature that is higher than connecting tube according to the initial shrinkage temperature or the softening point temperature of described thermal shrinkage of claim 5-7 or hot melt sheath.
9, the connecting tube of pipe end enlarging according to claim 1 is to be made by aluminum pipe or steel pipe.
10, the connecting tube of pipe end enlarging according to claim 9, tube outer surface covers zinc layer or aluminium zinc layer or other corrosion resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710027016 CN101021292A (en) | 2007-02-27 | 2007-02-27 | Pipe end flared connection pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710027016 CN101021292A (en) | 2007-02-27 | 2007-02-27 | Pipe end flared connection pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101021292A true CN101021292A (en) | 2007-08-22 |
Family
ID=38709138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710027016 Pending CN101021292A (en) | 2007-02-27 | 2007-02-27 | Pipe end flared connection pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101021292A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112653070A (en) * | 2020-12-22 | 2021-04-13 | 浙江晨光电缆股份有限公司 | Waterproof drawing head of composite smooth aluminum-sheathed cable and manufacturing method thereof |
-
2007
- 2007-02-27 CN CN 200710027016 patent/CN101021292A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112653070A (en) * | 2020-12-22 | 2021-04-13 | 浙江晨光电缆股份有限公司 | Waterproof drawing head of composite smooth aluminum-sheathed cable and manufacturing method thereof |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |