CN206429797U - The band prefabricated direct-buried heat insulation elbow of the seamless polyethylene of straight length - Google Patents
The band prefabricated direct-buried heat insulation elbow of the seamless polyethylene of straight length Download PDFInfo
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- CN206429797U CN206429797U CN201720096982.8U CN201720096982U CN206429797U CN 206429797 U CN206429797 U CN 206429797U CN 201720096982 U CN201720096982 U CN 201720096982U CN 206429797 U CN206429797 U CN 206429797U
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- straight length
- elbow
- heat insulation
- protection tube
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Abstract
The utility model discloses a kind of band prefabricated direct-buried heat insulation elbow of the seamless polyethylene of straight length, it includes outer protection tube, heat-insulation layer and elbow, the outer protection tube is the integral structure of thermoforming, it is sleeved on elbow, cavity is formed between outer protection tube inwall and elbow outer wall, the heat-insulation layer is filled in cavity, the elbow includes curved tube section and straight length, the straight length is connected to curved tube section two ends, the outer protection tube includes outer shield curved tube section and outer shield straight length, the outer shield straight length is connected to outer shield curved tube section two ends, when the utility model is connected at the scene, outer protection tube is the integral structure of thermoforming, not only without weld seam, outer protection tube integral rigidity is ensured, and with good airproof performance, bear the advantages of pressure is big, outer protection tube and elbow two ends are provided with straight length simultaneously, when connecting at the scene, straight length docks tighter with insulation straight tube, make welding very firm, finally increase the service life, ensure that pipe network being capable of long-term safety operation simultaneously.
Description
Technical field
The utility model is related to a kind of direct-burried heat supply heat insulation elbow, and in particular to a kind of band seamless polyethylene of straight length is prefabricated
Direct-burried heat insulation elbow.
Background technology
The making of prefabricated direct-buried heat insulation elbow has two ways both at home and abroad at present, and one is that heat insulation elbow polyethylene outer protective pipe is
Pass through sweat soldering by being cut into given shape；Two be that heat insulation elbow polyethylene outer protective pipe is formed in one, but outer protection tube
With elbow two ends without straight length, i.e., prefabricated direct-buried heat insulation elbow is by steel elbow and the outer protection tube elbow of welding fabrication（Or
Integrally formed outer protection tube）And polyurethane foaming thermal insulation material composition.
If polyethylene outer protective pipe is formed by being cut into given shape by sweat soldering, due to outer protection tube welding
Into in outer protection tube surface formation multiple-pass weld, at present without detection device, often through its quality condition is visually observed, weld seam is strong
Degree causes the pressure that can bear to reduce, is also easy to produce cracking, sealing is poor, influence heat insulation effect, make well below strength of parent
The shortcomings of using the lost of life, the weak link as conduit running；And the integrally formed outer protection tube elbow without straight length,
During joint connection in site, it is unreal interface easily occur, causes imprecision, produces gap, the problem of final not prison welding is solid, it is possible to give
Pipe network operation brings hidden danger.
Therefore, inventor concentrates on studies, and invents a kind of band prefabricated direct-buried heat insulation elbow of the seamless polyethylene of straight length, uses
The utility model, outer protection tube is the integral structure of thermoforming, not only without weld seam, has ensured outer protection tube integral rigidity, and
With good airproof performance, pressure is born greatly, the advantages of service life is long, while outer protection tube and elbow two ends are provided with straight length, existing
During connection, straight length docks tighter with insulation straight tube, makes welding very firm, finally increases the service life, simultaneously guarantor
Hindering pipe network being capable of long-term safety operation.
Utility model content
The technical problems to be solved in the utility model is：
A kind of band prefabricated direct-buried heat insulation elbow of the seamless polyethylene of straight length is provided, its outer protection tube is the integral type knot of thermoforming
Structure, solves current outer protection tube and is formed by being cut into given shape by sweat soldering, the weld seam caused is easy to crack, and sealing is poor,
Bear the low shortcoming of pressure, and outer protection tube is formed in one, but itself and elbow two ends do not have caused by straight length with insulation
When straight tube is docked, it is unreal interface easily occur, causes imprecision, produces gap, the problem of final not prison welding is solid.
In order to solve the above-mentioned technical problem, the utility model discloses a kind of prefabricated direct-buried guarantor of the band seamless polyethylene of straight length
Warm elbow, it includes outer protection tube, heat-insulation layer and elbow, and the outer protection tube is the integral structure of thermoforming, and it is sleeved on elbow
On, cavity is formed between outer protection tube inwall and elbow outer wall, the heat-insulation layer is filled in cavity, the elbow include curved tube section and
Straight length, the radius of curvature of the curved tube section is R, and the external diameter of curved tube section is D, and the length range of the radius of curvature R is R ＜
5D, the straight length is connected to curved tube section two ends, and the outer protection tube includes outer shield curved tube section and outer shield straight length, described outer
The radius of curvature for protecting curved tube section is equal with the radius of curvature of curved tube section, and the outer shield straight length is connected to outer shield curved tube section two
End.
Further, the outer protection tube is polyethylene material.
Further, the kernel of section of the outer protection tube and elbow is overlapped.
Further, the outer shield flow development length is 200mm.
Further, the heat-insulation layer is polyurethane foam.
Further, the elbow is metal material.
Further, the elbow is compressing.
Further, the flow development length is not less than 400mm.
Further, the straight length and curved tube section integrated formed structure.
Further, the outer shield straight length and outer shield curved tube section integrated formed structure.
When the utility model is connected at the scene, outer protection tube is the integral structure of thermoforming, not only without weld seam, is ensured
Outer protection tube integral rigidity, and with good airproof performance, bear pressure greatly, the advantages of service life is long, while outer protection tube and elbow
Two ends are provided with straight length, when connecting at the scene, and straight length docks tighter with being incubated straight tube, makes welding very firm, finally
Increase the service life, while ensureing that pipe network being capable of long-term safety operation.
Brief description of the drawings
Fig. 1 is the utility model structural representation；
Legend：1. outer protection tube, 11. outer shield curved tube sections, 12. outer shield straight lengths, 2. heat-insulation layers, 3. elbows, 31. curved tubes section,
32. straight length.
Embodiment
The utility model is described further with reference to embodiment, but is not limited to the content on specification.
The utility model discloses a kind of band prefabricated direct-buried heat insulation elbow of the seamless polyethylene of straight length, it include outer protection tube 1,
Heat-insulation layer 2 and elbow 3, the outer protection tube 1 are the integral structure of polyethylene thermoforming, described to be thermoformed into fire bending system or hot pressing
System, not only without weld seam, has ensured outer protection tube integral rigidity, and with good airproof performance, bear the advantages of pressure is big, outer protection tube
1 is sleeved on elbow 3 and is overlapped with the kernel of section of elbow 3, and cavity, the guarantor are formed between the inwall of outer protection tube 1 and the outer wall of elbow 3
Warm layer 2 is filled in cavity, and heat-insulation layer 2 is polyurethane foam, and full polyurethane foam is filled in cavity, same thickness is formed
Heat-insulation layer 2, makes insulation uniform, and the elbow 3 is that metal material is integrally compressing, and it includes curved tube section 31 and straight length 32,
The radius of curvature of the curved tube section 31 is R, and the external diameter of curved tube section 31 is D, and the length range of the radius of curvature R is R ＜ 5D, institute
State straight length 32 and be connected to 31 two ends of curved tube section, its length establishing criteria GB/T29047 is determined, will for meet welding
400mm should be not less than by asking, and the outer protection tube 1 includes outer shield curved tube section 11 and outer shield straight length 12, the outer shield curved tube section 11
Radius of curvature is equal with the radius of curvature of curved tube section 31, and the outer shield straight length 12 is connected to 11 two ends of outer shield curved tube section,
When connecting at the scene, outer shield straight length 12 docks tighter with insulation straight tube, makes welding very firm, increases the service life,
The outer shield length establishing criteria GB/T29047 of straight length 12 determines that its length is 200mm.
Elbow 3 with straight length is prior art, makes and produces according to the standard of country, its radius of curvature is less than outside it
5 times of footpath.
Polyurethane foam is by isocyanates（Monomer）It is polymerized with hydroxy compounds, with good heat insulating, heat conduction system
Number bottom, easy to use quick, ageing-resistant, the advantages of service life is long, is most preferable heat-insulating material using in utilidor.
When being connected at the scene using the utility model, outer protection tube is the integral structure of thermoforming, not only without weld seam, is protected
Hindered outer protection tube integral rigidity, and with good airproof performance, it is big to bear pressure, the advantages of service life is long, at the same outer protection tube and
Elbow is provided at both ends with straight length, when connecting at the scene, and straight length docks very tight with insulation straight tube, makes welding more firm
Gu, finally increase the service life, while ensureing that pipe network being capable of long-term safety operation.
Obviously, above-mentioned embodiment of the present utility model is only intended to clearly illustrate the utility model example,
And it is not the restriction to embodiment of the present utility model.For affiliated one of ordinary skill in the art, above-mentioned
It can also be made other changes in different forms on the basis of explanation.Here all embodiments can not be given thoroughly
Lift.It is every to belong to obvious changes or variations that the technical solution of the utility model extends out still in the utility model
Protection domain row.
Claims (10)
1. a kind of band prefabricated direct-buried heat insulation elbow of the seamless polyethylene of straight length, it is characterised in that：It includes outer protection tube（1）, insulation
Layer（2）And elbow（3）, the outer protection tube（1）For the integral structure of thermoforming, it is sleeved on elbow（3）On, outer protection tube（1）
Inwall and elbow（3）Cavity, the heat-insulation layer are formed between outer wall（2）It is filled in cavity, the elbow（3）Including curved tube section
（31）And straight length（32）, the curved tube section（31）Radius of curvature be R, curved tube section（31）External diameter be D, the radius of curvature
R length range is R ＜ 5D, the straight length（32）It is connected to curved tube section（31）Two ends, the outer protection tube（1）Including outer
Protect curved tube section（11）With outer shield straight length（12）, the outer shield curved tube section（11）Radius of curvature and curved tube section（31）Curvature half
Footpath is equal, the outer shield straight length（12）It is connected to outer shield curved tube section（11）Two ends.
2. the prefabricated direct-buried heat insulation elbow of the seamless polyethylene of band straight length according to claim 1, it is characterised in that：It is described outer
Pillar（1）For polyethylene material.
3. the prefabricated direct-buried heat insulation elbow of the seamless polyethylene of band straight length according to claim 1 or 2, it is characterised in that：Institute
State outer protection tube（1）And elbow（3）Kernel of section overlap.
4. the prefabricated direct-buried heat insulation elbow of the seamless polyethylene of band straight length according to claim 1, it is characterised in that：It is described outer
Protect straight length（12）Length is 200mm.
5. the prefabricated direct-buried heat insulation elbow of the seamless polyethylene of band straight length according to claim 1, it is characterised in that：It is described to protect
Warm layer（2）For polyurethane foam.
6. the prefabricated direct-buried heat insulation elbow of the seamless polyethylene of band straight length according to claim 1, it is characterised in that：It is described curved
Head（3）For metal material.
7. the prefabricated direct-buried heat insulation elbow of the seamless polyethylene of band straight length according to claim 1 or 6, it is characterised in that：Institute
State elbow（3）To be compressing.
8. the prefabricated direct-buried heat insulation elbow of the seamless polyethylene of band straight length according to claim 1, it is characterised in that：It is described straight
Pipeline section（32）Length is not less than 400mm.
9. the prefabricated direct-buried heat insulation elbow of the seamless polyethylene of band straight length according to claim 1 or 8, it is characterised in that：Institute
State straight length（32）With curved tube section（31）Be formed in one structure.
10. the prefabricated direct-buried heat insulation elbow of the seamless polyethylene of band straight length according to claim 1 or 4, it is characterised in that：Institute
State outer shield straight length（12）With outer shield curved tube section（11）Be formed in one structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720096982.8U CN206429797U (en) | 2017-01-25 | 2017-01-25 | The band prefabricated direct-buried heat insulation elbow of the seamless polyethylene of straight length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720096982.8U CN206429797U (en) | 2017-01-25 | 2017-01-25 | The band prefabricated direct-buried heat insulation elbow of the seamless polyethylene of straight length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206429797U true CN206429797U (en) | 2017-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720096982.8U Active CN206429797U (en) | 2017-01-25 | 2017-01-25 | The band prefabricated direct-buried heat insulation elbow of the seamless polyethylene of straight length |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883352A (en) * | 2018-08-23 | 2022-01-04 | 山西理工红日节能服务有限公司 | Prefabricated heat preservation double-deck return bend |
-
2017
- 2017-01-25 CN CN201720096982.8U patent/CN206429797U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883352A (en) * | 2018-08-23 | 2022-01-04 | 山西理工红日节能服务有限公司 | Prefabricated heat preservation double-deck return bend |
| CN113883352B (en) * | 2018-08-23 | 2023-11-21 | 山西理工红日节能服务有限公司 | Prefabricated heat-insulating double-layer bent pipe |
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