CN204083633U - The electric melting plastic pipe of D font covering thread electric heating wire - Google Patents
The electric melting plastic pipe of D font covering thread electric heating wire Download PDFInfo
- Publication number
- CN204083633U CN204083633U CN201420362856.9U CN201420362856U CN204083633U CN 204083633 U CN204083633 U CN 204083633U CN 201420362856 U CN201420362856 U CN 201420362856U CN 204083633 U CN204083633 U CN 204083633U
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- China
- Prior art keywords
- heating wire
- plastic pipe
- electric heating
- covering thread
- melting plastic
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- Branch Pipes, Bends, And The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The utility model provides a kind of electric melting plastic pipe of D font covering thread electric heating wire, belong to gas pipeline connected element technical field, being intended to solve the cross section that between existing electric melting plastic pipe adjacent covering thread formula electric heating wire, surface is formed is that Δ shape helical groove spatial area is large, the problem that soldered pipe part weld strength is low.The cross section of the covering thread formula electric heating wire that its adopts to be cross section the be coated resistance wire of inner core is the D font covering thread formula electric heating wire that the circle of D font clad and single injection-molded lacks shape PE clad, and electric melting plastic pipe comprises any one electric melting plastic pipe that electro-fusion socket connects plastic pipe, electro-fusion socket connects plastic-steel crossover connection part, U-shaped electric melting plastic pipe.The cross section that between its adjacent covering thread formula electric heating wire, surface is formed is that Δ shape helical groove spatial area is little, and soldered pipe part weld strength is high, and the laying being applicable to delivery of fuel gas pipeline connects.
Description
Technical field
The utility model belongs to a kind of electric melting plastic pipe in gas pipeline connected element technical field.
Background technique
Electric melting plastic pipe is one of connected element main in the installation of polyvinyl plastics gas pipeline, it connects also known as electric fusion welding with electric smelting, the resistance wire heating power of electric melting pipe fittings internal surface is embedded in by electrical connection polyethylene (PE), the material of electric melting pipe fittings internal surface and socket joint pipe outer surface is made to reach melting point, intensification material expansion produces welding pressure, combine together after the transfer of molecule, diffusion, winding, cooling, reach welding object.Along with the growing of Plastic Gas pipeline and technological progress, also more and more higher to the technical requirements of polyvinyl plastics gas pipeline electric melting plastic pipe used.In known technology, electric heating wire system of laying set by existing electric melting pipe fittings internal surface has two kinds usually: the first is exposed resistive wire, deficiency one is that resistance wire surface exposed after a period of time deposited by pipe fitting is easy to be oxidized, two is that resistance wire exposed in carrying with work progress is easy to be subject to mechanical deterioration, and these unfavorable factors all directly can affect the normal use of electric melting pipe fittings, the second is covering thread formula electric heating wire, the resistance wire outer surface being injected into one with electric melting pipe fittings is prefabricated polyethylene (PE) clad, deficiency is, because covering thread formula electric heating wire is that to be coated with its profile of resistance wire be cylindrical body to the telescopic clad of annulus, covering thread formula electric heating wire is arranged at electric melting pipe fittings inwall welding area spiral wound, the cross section that between adjacent covering thread formula electric heating wire, surface is formed is that Δ shape helical groove spatial area is large, and the spatial area of this Δ shape helical groove obviously becomes large along with the increasing of covering thread formula electric heating wire external diameter, correspondingly increase a kind of modification space except matching gap necessary between electric melting pipe fittings internal diameter be connected tube outer diameter, therefore, delay the time of welding area gap-closing in electric fusion welding process, when causing energising to heat up, material expansion generation welding pressure is on the low side, have a strong impact on pipe part welding quality, cause soldered pipe part weld strength low.Through test for several times, carry out in electric fusion welding assembly peel test process after the cooling period, find weldment weld bond axial section welding area easily there is melting after resistance wire skewness, indivedual severe patient have spring silk phenomenon, welding zone easily produces hole and even produce and run through radial clearance and form leakage, easily there is the welding quality defects such as brittle cracking in weld bond, in addition due to the impact of weld strength, after gas pipeline system electric fusion welding bulge test qualified normal operation a period of time, still have indivedual weld bond generation gas leak phenomenon, there is welding quality potential safety hazard.
Model utility content
In order to overcome the deficiencies in the prior art, solving the cross section that between existing electric melting plastic pipe adjacent covering thread formula electric heating wire, surface is formed is that Δ shape helical groove spatial area is large, the problem that soldered pipe part weld strength is low.The covering thread formula heating wire structure that the object of the utility model is to provide a kind of electric melting plastic pipe is novel, the cross section that between adjacent covering thread formula electric heating wire, surface is formed is that Δ shape helical groove spatial area is little, soldered pipe part weld strength is high, the electric melting plastic pipe of the new-type covering thread electric heating wire of welding quality stable.
The technical scheme in the invention for solving the above technical problem is:
A kind of electric melting plastic pipe of D font covering thread electric heating wire, it is provided with: electric melting plastic pipe, covering thread formula electric heating wire, the circle of covering thread formula electric heating wire to be the cross section of the coated resistance wire of inner core be D font PE clad and single injection-molded lacks the D font covering thread formula electric heating wire of shape PE clad, and electric melting plastic pipe comprises any one electric melting plastic pipe that electro-fusion socket connects plastic pipe, electro-fusion socket connects plastic-steel crossover connection part, U-shaped electric melting plastic pipe.
The electric melting plastic pipe of above-mentioned D font covering thread electric heating wire, the circle that described covering thread formula electric heating wire cross section is the coated resistance wire of inner core that cylindric PE clad side is scraped made by a plane for D font PE clad lacks shape PE clad.
When the utility model uses, the same with existing electric melting plastic pipe, according to designing requirement, in the installation of polyvinyl plastics gas pipeline, electric melting plastic pipe of the present utility model is inserted after connecting plastic tube, switch on power, just carry out the electric fusion welding operation of electric melting pipe fittings and be connected plastic tube.
Because the utility model design have employed technique scheme, efficiently solving the cross section that between existing electric melting plastic pipe adjacent covering thread formula electric heating wire, surface is formed is that Δ shape helical groove spatial area is large, the problem that soldered pipe part weld strength is low.Also on probation through showing through test for several times, it compared with prior art, the covering thread formula heating wire structure with electric melting plastic pipe is novel, the cross section that between adjacent covering thread formula electric heating wire, surface is formed is that Δ shape helical groove spatial area is little, as diameter 0.6mm resistance wire, coating thickness is 0.9mm, and coated rear covering thread formula electric heating wire external diameter is 2.4mm, and D font covering thread formula electric heating wire helical groove cross section of the present utility model Δ shape area is 0.048mm
2be comparatively 0.618mm than the cylindrical covering thread formula electric heating wire helical groove cross section Δ shape area of same model
2narrow down to 7.76699%, directly decrease the free space of electric fusion welding process in which materials expanded by heating, because welding area gap-closing process is accelerated, cause tubing inner welding area melt pressure to raise, fusion penetration strengthens, thus bonding strength is improved, resistance wire after melting is simultaneously evenly distributed, welding area weld bond axial section hole is few, weld bond welding quality stable, soldered pipe part weld strength advantages of higher, the laying being applicable to delivery of fuel gas pipeline connects.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the structure diagram that conversion pipe fitting embodiment moulded by fuel gas transportation pipeline electric smelting bellmouth steel that the utility model electric smelting mouthing straight tube joint for plastic tube and external tapping are shaped with inner thread steel pipe joint.
Fig. 2 is the zoomed-in view of part A in Fig. 1 embodiment.
Fig. 3 is the zoomed-in view of part B in Fig. 2.
Fig. 4 is the structure diagram with the cylindrical covering thread formula electric heating wire of the D font covering thread formula electric heating wire embodiment same model of Fig. 3.
Fig. 5 is the structure diagram of the utility model earth-source hot-pump system vertical underground heat exchanger by U-shaped electric melting plastic pipe embodiment.
In accompanying drawing, each label is: 1 plastic tube; 2 electric power connecting posts; 3 covering thread formula electric heating wire; 3-1D font clad; 3-2 resistance wire; 3-3 ring tube clad; 4 telescopic Steel Skeletons; 5 electric melting plastic pipes; 6 steel pipe joints; 7U type electric melting plastic pipe; The Δ shape cross-section area of the helical groove between M1 adjacent D font covering thread formula electric heating wire; The Δ shape cross-section area of the helical groove between M2 adjacent column shape covering thread formula electric heating wire.
Embodiment
As shown in accompanying drawing 1-Fig. 4, the present embodiment is provided with: electric melting plastic pipe 5, plastic tube 1, steel pipe joint 6, telescopic Steel Skeleton 4, covering thread formula electric heating wire 3, the circle of covering thread formula electric heating wire 3 to be cross sections of the coated resistance wire 3-2 of inner core be D font clad and single injection-molded lacks the D font covering thread formula electric heating wire of shape PE clad 3-1, and electric melting plastic pipe 5 is that electro-fusion socket connects plastic pipe.
With reference to accompanying drawing 5, the present embodiment is provided with: U-shaped electric melting plastic pipe 7, plastic tube 1 and D font covering thread formula electric heating wire 3, U-shaped electric melting plastic pipe 7 inner tubal wall is embedded with D font covering thread formula electric heating wire 3.
Subordinate list 1: the D font covering thread electric heating wire size of regular size and the cross section of helical groove for Δ shape area and compared with same specification cylindrical covering thread formula electric heating wire institute's reduce in scale laboratory data table
(unit: mm)
。
Claims (2)
1. the electric melting plastic pipe of a D font covering thread electric heating wire, it is provided with electric melting plastic pipe, covering thread formula electric heating wire, it is characterized in that, the circle of covering thread formula electric heating wire to be the cross section of the coated resistance wire of inner core (3-2) be D font PE clad and single injection-molded lacks D font covering thread formula electric heating wire (3) of shape PE clad (3-1), and electric melting plastic pipe comprises any one electric melting plastic pipe that electro-fusion socket connects plastic pipe, electro-fusion socket connects plastic-steel crossover connection part, U-shaped electric melting plastic pipe.
2. the electric melting plastic pipe of D font covering thread electric heating wire according to claim 1, it is characterized in that, the circle that covering thread formula electric heating wire cross section is the coated resistance wire of inner core that cylindric PE clad side is scraped made by a plane for D font PE clad (3-1) lacks shape PE clad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420362856.9U CN204083633U (en) | 2014-07-02 | 2014-07-02 | The electric melting plastic pipe of D font covering thread electric heating wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420362856.9U CN204083633U (en) | 2014-07-02 | 2014-07-02 | The electric melting plastic pipe of D font covering thread electric heating wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204083633U true CN204083633U (en) | 2015-01-07 |
Family
ID=52176354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420362856.9U Expired - Fee Related CN204083633U (en) | 2014-07-02 | 2014-07-02 | The electric melting plastic pipe of D font covering thread electric heating wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204083633U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681358A (en) * | 2019-02-13 | 2019-04-26 | 恒睿汽车电子(苏州)有限公司 | A kind of novel high pressure oil rail and its manufacturing method |
-
2014
- 2014-07-02 CN CN201420362856.9U patent/CN204083633U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681358A (en) * | 2019-02-13 | 2019-04-26 | 恒睿汽车电子(苏州)有限公司 | A kind of novel high pressure oil rail and its manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20170702 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |