CN209084264U - A kind of combined type electric melting pipe fittings - Google Patents
A kind of combined type electric melting pipe fittings Download PDFInfo
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- CN209084264U CN209084264U CN201821393744.4U CN201821393744U CN209084264U CN 209084264 U CN209084264 U CN 209084264U CN 201821393744 U CN201821393744 U CN 201821393744U CN 209084264 U CN209084264 U CN 209084264U
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- inner tube
- combined type
- type electric
- electric melting
- pipe fittings
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Abstract
The utility model provides a kind of combined type electric melting pipe fittings, including the inner tube being made of plastics and the casing being set in the middle part of outside the inner tube, the interior pipe internal surface is equipped with internal layer resistance wire, the internal surface of casing or the inner tube outer surface are equipped with outer layer resistance wire, having between the inner tube and the casing allows the inner tube in internal layer resistance wire work, the gap for allowing the inner tube to be radially expanded.First inner tube and tubing are welded when use, inner tube is heated to generate certain radial deformation, reduced by the pressure for the plastics for allowing the gap expanded to make to melt, the axially flowing reduction of the plastics of melting.
Description
Technical field
The utility model relates to pipeline field, especially a kind of combined type electric melting pipe fittings.
Background technique
In recent years, plastic conduit has obtained more and more applications in combustion gas, water supply and draining field.With pipe technology
Development, the anti-pressure ability of pipeline is required higher and higher, while higher want also proposed to the connecting pipe between pipeline
It asks, it is desirable to which connection sealing can be good, and voltage endurance capability is bigger.
PPR material is widely used in hot-water pipeline system, the main spy of hot-water line due to its excellent heat resistance
Point is that tube wall thickness is thicker, generally relatively elaborate using common hot melt spigot-and-socket when bore is larger, and construction is inconvenient.Therefore PPR
Electric melting pipe fittings weld afterwards due to using first to assemble, and bellmouth internal diameter is big compared with tube outer diameter when installation, construct laborsaving light, gradually
It is widely applied.
After tubing design strength increase, electric melting pipe fittings wall thickness also thickeies therewith, due to leading for plastics especially PPR material
Hot property is poor, welding temperature is high, melt flow index is big, and in the thicker pipeline of welding wall thickness, inner layer material temperature is high, expands
Fastly, the deformation of inner layer material by material outside constraint, between plastics especially PPR after melting is between electric melting pipe fittings and tubing
In gap can along axial flowing, this flowing when being easy to make spiral resistance wire arrangement change, once it is short in the middle part of resistance wire
Road will lead to Resistant heating power and rise rapidly, and aggravate plastic melt, and heating power is more than the bearing value of material, spray
The welding qualities accident such as expect, smolder.
Utility model content
In order to overcome the above problem, the purpose of this utility model is to provide one kind to reduce molten plastic when welding tubing
The combined type electric melting pipe fittings axially flowed.
In order to achieve the above-mentioned advantages, the utility model offer combined type electric melting pipe fittings, including the inner tube being made of plastics and are arranged
The casing at middle part outside the inner tube, the interior pipe internal surface are equipped with internal layer resistance wire, and the internal surface of casing or the inner tube outer surface are set
There is outer layer resistance wire, having between the inner tube and the casing allows the inner tube in internal layer resistance wire work, allows the inner tube
The gap being radially expanded.
In one embodiment of the utility model, the outer peripheral surface of said inner tube end is equipped with to be connect with the internal layer resistance wire
Electrode, described sleeve pipe outer peripheral surface is equipped with the electrode that connect with the outer layer resistance wire.
In one embodiment of the utility model, said inner tube and described sleeve pipe outer peripheral surface are respectively equipped with peep hole.
In one embodiment of the utility model, between said inner tube and described sleeve pipe have gasket ring, the gasket ring with it is described
Inner tube and/or described sleeve pipe are connected and fixed.
In one embodiment of the utility model, the gasket ring is arranged at the gap both ends.
In one embodiment of the utility model, the gasket ring is made of elastic material.
In one embodiment of the utility model, said inner tube or described sleeve pipe outer wall have it is multiple axially arrange it is outer recessed
Slot.
In one embodiment of the utility model, the section of the external groove is semicircle.
In one embodiment of the utility model, said inner tube or described sleeve pipe have spiral inner groovy.
In one embodiment of the utility model, said inner tube, described sleeve pipe, the plastic grain are by PPR or PE system
At.
In the utility model, first inner tube and tubing are welded when use, inner tube is heated to generate certain radial deformation, lead to
The plastics axial direction flowing for crossing pressure reduction, the melting of the plastics for allowing the gap expanded to make melting is reduced.
Detailed description of the invention
Fig. 1 show the structural schematic diagram of the combined type electric melting pipe fittings of the utility model first embodiment.
Fig. 2 show the partial enlarged view at the combined type electric melting pipe fittings A of Fig. 1.
Fig. 3 show the cut-away illustration of the combined type electric melting pipe fittings of Fig. 1.
Fig. 4 show the structural schematic diagram of the combined type electric melting pipe fittings of the utility model second embodiment.
Fig. 5 show the cut-away illustration of the combined type electric melting pipe fittings of Fig. 4.
Fig. 6 show the structural schematic diagram of the combined type electric melting pipe fittings of the utility model 3rd embodiment.
Fig. 7 show the partial enlarged view at the combined type electric melting pipe fittings B of Fig. 6.
Fig. 8 show the structural schematic diagram of the combined type electric melting pipe fittings of the utility model fourth embodiment.
Fig. 9 show the cut-away illustration of the combined type electric melting pipe fittings of Fig. 8.
Specific embodiment
Further to illustrate that the utility model is the technical means and efficacy reaching predetermined purpose of utility model and being taken,
Below in conjunction with attached drawing and preferred embodiment, to according to the utility model proposes specific embodiment, structure, feature and its effect,
Detailed description is as follows.
Referring to Figure 1, Fig. 2, the combined type electric melting pipe fittings of the first embodiment of the utility model, including what is be made of plastics
Inner tube 1 and the casing 2 for being set in the outer middle part of the inner tube 1,1 inner surface of inner tube are equipped with internal layer resistance wire 11,1 end of inner tube it is outer
Circumferential surface is equipped with the interior pipe electrode 12 connecting with internal layer resistance wire 11.2 inner surface of casing is equipped with outer layer resistance wire 21, outside casing 2
Circumferential surface is equipped with the bushing electrode 22 connecting with outer layer resistance wire 21.
Having between the inner tube 1 and the casing 2 allows the inner tube 1 in the internal layer resistance wire 11 work, allows the inner tube 1
The gap a being radially expanded.In inner tube 1 during pipe fitting welding, 1 expanded by heating of inner tube, 1 outer wall of inner tube is in 2 inner surface of casing
Patch and.Casing 2 is for improving the intensity of inner tube 1 and guaranteeing the integral strength of the combined type electric melting pipe fittings.
Inner tube 1 and 2 outer peripheral surface of casing are respectively equipped with inner tube peep hole 13 and casing peep hole 23.Inner tube peep hole 13 and set
Pipe peep hole 23 is used to judge the quality whether welding is completed and welded.
There is gasket ring 3, which is connected and fixed with inner tube 1 and/or casing 2 between inner tube 1 and casing 2.Gasket ring 3 can be with
Guarantee that inner tube 1 is identical with the axes O of casing 2, guarantees that gap a is uniformly distributed.Gasket ring 3 is arranged at the gap both ends a and makes 1 He of inner tube
Gap a is kept between casing 2.Gasket ring 3 is also used to seal clearance a, prevents the outflow of molten plastic.Gasket ring 3 is by elastic material system
At.
Fig. 3 is referred to, inner tube 1 or 2 outer wall of casing have multiple external grooves 4 axially arranged.The section of external groove 4 is half
It is round.External groove 4 is used to increase the radial-deformation of inner tube 1 or casing 2.2 inner surface of cooling zone 14 or casing at 1 middle part of inner tube
With spiral inner groovy 5.The section of inner groovy 5 is semicircle.Inner groovy 5 is used to increase inner tube 1 or the radial of casing 2 becomes
Shape amount.Inner tube 1, casing 2, plastic grain are made of PPR or PE.
The construction process of the electric melting pipe fittings are as follows:
1, the depth of weld for being inserted into the inner tube 1 or welding section are measured and marked on tubing with marking pen, should be noted simultaneously
Tube end face is sectioned perpendicular to axes O.
2, before welding that the oxide layer of tubing welding section is fully erased.
3, tubing and the face of weld of the inner tube 1 must be clean, dry.
4, tubing welding ends is inserted into the interface of 1 two sides of inner tube respectively and is contained in the welding section of inner tube 1, the inner tube 1
It must be connect under stress-free conditions with tubing.
5, the plug of welding machine is electrically connected with interior pipe electrode 12, accurately input weld interval for being demarcated on the electric melting pipe fittings and
Cooling time.
6, after preparation is ready, welding machine can show welding parameter, after fully validated, then start welding machine and start to weld, weldering
Welding machine can prompt welding procedure to terminate after connecing, and judge whether welding is completed finally by observation inner tube peep hole 13.
7, after having welded inner tube 1, then by 22 soldering sleeve 2 of bushing electrode and inner tube 1, observation casing peep hole 23 judges
Whether welding is completed.(welding process compares step 5 and step 6)
In inner tube 1 and the welding process of tubing, inner tube 1 is welded and fixed with tubing, while inner tube 1 and tubing melted by heat
The partial melting plastics of formation along the path that inner groovy 5 is formed to flowing in the middle part of inner tube 1, thus including reducing the plastics of melting
Pressure in pipe 1 reduces influence of the axial flowing of the plastics of melting to internal layer resistance wire 11.The radial deformation of part inner tube 1
The external groove 4 through 1 outer wall of inner tube is measured to disperse.At this time 1 outer wall of inner tube in 2 inner surface of casing patch and.
In inner tube 1 and the welding process of casing 2, inner tube 1 is welded and fixed with casing 2, and inner tube 1 and casing 2 are welded into
One entirety guarantees the intensity of electric melting pipe fittings.
Refer to Fig. 4, Fig. 5, in the second embodiment of the utility model, the cooling zone 14 of inner tube 1 has the table along inner tube 1
The circumferentially distributed inner groovy 5 in face, the section of inner groovy 5 are semicircle.
In the thermal histories of the combined type electric melting pipe fittings, inner tube 1 and pipe fitting are respectively melted into molten condition, redundance
The plastics of melting flow in inner groovy 5, make the radial deformation for reducing inner tube 1.
The present embodiment has spiral inner groovy 5 compared to the inner tube 1 of first embodiment, by along inner tube 1 inner surface week
To the inner groovy 5 of distribution, avoid the plastics of melting because path it is single caused by block the case where generation, make the plastics of melting
It is uniformly distributed in inner groovy 5, to possess better welding effect.
Refer to Fig. 6, Fig. 7, in the 3rd embodiment of the utility model, gasket ring 3 is detachably connected with inner tube 1 and casing 2.
1 outer wall of inner tube has the annular notch of accommodating portion gasket ring 3, and gasket ring 3 has limiting section 31 corresponding with annular notch, limiting section
31 include perpendicular to the confined planes 311 of axes O and to the inclined guide surface 312 of casing 2.Confined planes 311 are for limiting the back of gasket ring 3
It is mobile to 2 direction of casing.Guide surface 312 is for being set in 1 outer wall of inner tube when assembling convenient for gasket ring 3.
During the combined type electric melting pipe fittings are installed, the preferential gasket ring 3 for installing side, then casing 2 is installed, finally install
The gasket ring 3 of the other side.It is moved axially since limiting section 31 limits gasket ring 3, to realize fixed sleeving 2 and make casing 2 and inner tube 1
Keep gap a.
The present embodiment is connected and fixed compared to the gasket ring 3 of first embodiment with inner tube 1 and/or casing 2, by detachably connecting
The gasket ring 3 connect makes the combined type electric melting pipe fittings that can have better control in the machining accuracy to single component, in the combined type
Electric melting pipe fittings are convenient to overhaul when breaking down and replace, and save maintenance cost.
Refer to Fig. 8, Fig. 9, in the fourth embodiment of the utility model, which is equipped with outer layer resistance wire 21, set
2 outer peripheral surface of pipe is equipped with the bushing electrode 22 connecting with outer layer resistance wire 21.1 outer wall of inner tube does not have external groove 4.
Since outer layer resistance wire 21 and internal layer resistance wire 11 are located at the outer wall and inner surface of inner tube 1, processing
In the process, the wiring for outer layer resistance wire 21 and internal layer resistance wire 11 is more concentrated, compared to the separated cloth of first embodiment
The combined type electric melting pipe fittings of the process of line, the present embodiment have saved processing cost.
In the present invention, the wall thickness of inner tube 1 and casing 2 with gap a therewith, inner tube 1 and casing 2 all than relatively thin,
Inner tube 1 and tubing is first used to weld when use, inner tube 1 is heated to generate certain radial deformation, and the pressure of the plastics of melting subtracts
Small, axially flowing is reduced the plastics of melting, and inner tube 1 and casing 2 are hereafter welded into an entirety again and guarantee the strong of electric melting pipe fittings
Degree.
In the present invention, there is gasket ring 3 between said inner tube 1 and described sleeve pipe 2, it is ensured that inner tube 1 and casing 2
Axes O is identical, guarantees that gap a is uniformly distributed.
In the present invention, 1 outer wall of said inner tube has multiple inner groovies 5 axially arranged, increases inner tube 1 outer wall week
It is long, increase the radial-deformation of inner tube 1.
In the present invention, said inner tube 1 has spiral inner groovy 5, the modeling that inner groovy 5 can be melted with accommodating portion
Material, on the other hand can guide the molten plastic axially flowed, move along the hand of spiral, reduce the shadow to internal layer resistance wire 11
It rings, reduces axial flowing.
More than, it is only the preferred embodiment of the utility model, limit in any form not is made to the utility model
System, although the utility model has been disclosed with preferred embodiment as above, is not intended to limit the utility model, any to be familiar with sheet
Technical professional is not departing within the scope of technical solutions of the utility model, when the technology contents work using the disclosure above
A little change or it is modified to the equivalent embodiment of equivalent variations out, but all without departing from the content of the technical scheme of the utility model, according to
According to the technical essence of the utility model any simple modification, equivalent variations and modification to the above embodiments, still fall within
In the range of technical solutions of the utility model.
Claims (10)
1. a kind of combined type electric melting pipe fittings, which is characterized in that including the inner tube being made of plastics and be set in middle part outside the inner tube
Casing, which is equipped with internal layer resistance wire, and the internal surface of casing or the inner tube outer surface are equipped with outer layer resistance wire, should
Having between inner tube and the casing allows the inner tube in internal layer resistance wire work, the gap for allowing the inner tube to be radially expanded.
2. combined type electric melting pipe fittings according to claim 1, which is characterized in that the outer peripheral surface of said inner tube end be equipped with
The electrode of the internal layer resistance wire connection, described sleeve pipe outer peripheral surface are equipped with the electrode connecting with the outer layer resistance wire.
3. combined type electric melting pipe fittings according to claim 1, which is characterized in that said inner tube and described sleeve pipe outer peripheral surface point
It She You not peep hole.
4. combined type electric melting pipe fittings according to claim 1, which is characterized in that have between said inner tube and described sleeve pipe
Gasket ring, the gasket ring are connected and fixed with said inner tube and/or described sleeve pipe.
5. combined type electric melting pipe fittings according to claim 4, which is characterized in that the gasket ring is arranged in the gap two
End.
6. combined type electric melting pipe fittings according to claim 4, which is characterized in that the gasket ring is made of elastic material.
7. combined type electric melting pipe fittings according to claim 5, which is characterized in that said inner tube or described sleeve pipe outer wall have
Multiple external grooves axially arranged.
8. combined type electric melting pipe fittings according to claim 7, which is characterized in that the section of the external groove is semicircle.
9. combined type electric melting pipe fittings according to claim 7, which is characterized in that said inner tube or described sleeve pipe have spiral
The inner groovy of shape.
10. combined type electric melting pipe fittings according to claim 8, which is characterized in that said inner tube, described sleeve pipe are by PPR
Or PE is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821393744.4U CN209084264U (en) | 2018-08-28 | 2018-08-28 | A kind of combined type electric melting pipe fittings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821393744.4U CN209084264U (en) | 2018-08-28 | 2018-08-28 | A kind of combined type electric melting pipe fittings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209084264U true CN209084264U (en) | 2019-07-09 |
Family
ID=67115393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821393744.4U Active CN209084264U (en) | 2018-08-28 | 2018-08-28 | A kind of combined type electric melting pipe fittings |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000069A (en) * | 2018-08-28 | 2018-12-14 | 浙江伟星新型建材股份有限公司 | A kind of combined type electric melting pipe fittings |
-
2018
- 2018-08-28 CN CN201821393744.4U patent/CN209084264U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000069A (en) * | 2018-08-28 | 2018-12-14 | 浙江伟星新型建材股份有限公司 | A kind of combined type electric melting pipe fittings |
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