CN206904393U - Double-walled spiral welded pipe - Google Patents
Double-walled spiral welded pipe Download PDFInfo
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- CN206904393U CN206904393U CN201720861867.5U CN201720861867U CN206904393U CN 206904393 U CN206904393 U CN 206904393U CN 201720861867 U CN201720861867 U CN 201720861867U CN 206904393 U CN206904393 U CN 206904393U
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Abstract
The utility model belongs to wellsite operation accessory field, more particularly to a kind of double-walled spiral welded pipe.Including pipeline body, the structure ecto-entad of described pipeline body includes external anti-corrosion layer, carbon steel outer layer, cement interlayer, carbon steel internal layer and stainless steel layer successively, carbon steel outer layer, carbon steel internal layer and stainless steel layer are welded by ribbon spiral coiling, and spiral weld is formed in the outside of corresponding structure sheaf after welding.Described carbon steel outer layer and the thickness of carbon steel internal layer are 2 10mm.The thickness of described cement interlayer is 10 200mm.The thickness of described stainless steel layer is 0.2 3mm.Described carbon steel internal layer is identical with the pitch of the spiral weld on stainless steel layer, and two spiral welds shift to install.Described external anti-corrosion layer is made up of pitch or fiberglass.The utility model effectively increases the compression strength of pipe side wall, while also reduce manufacture and the construction cost of pipeline by setting cement interlayer between two layers of carbon steel.
Description
Technical field
The utility model belongs to wellsite operation accessory field, more particularly to a kind of double-walled spiral welded pipe.
Background technology
Water supply and sewerage pipeline is a kind of facility in municipal works.The diameter of municipal water supply and sewerage pipeline is generally larger (common
Maximum gauge can reach 4-5 rice), in order to ensure that pipeline will not be collapsed, it is necessary to improved by way of increasing pipe thickness
The compression strength of pipe side wall, therefore, carbon steel pipe steel using amount is larger, and weight is also larger, causes manufacture and construction cost to occupy height not
Under.
Existing water supply and sewerage pipeline mainly has two kinds, and one kind is reinforced concrete pipiline, and another kind is the mixed of outer steel pipe
Coagulate native pipeline.The shortcomings that reinforced concrete pipiline is that comparison is heavy, and freight is high, and construction needs larger plant equipment, applies
The work cycle is grown, and pipe joint easy to leak causes medium pollution in underground water pollution or pipe, the easy breed bacteria of inner-walls of duct etc..With steel
Type reinforced concrete pipeline is compared, and the concrete duct of outer steel pipe can reduce pipe under conditions of same outer pressure resistance is ensured
Wall thickness, but still suffer from distinct disadvantage：Steel pipe inner wall easily corrodes, the excessively thin easily erosion damage of concrete layer, due to concrete
The inner side of layer and the outer pressure resistance of chainless pipeline still need by the thickness of raising concrete to protect to a certain extent
Card.
The content of the invention
The utility model provides a kind of double-walled spiral welded pipe, to solve the problems mentioned in the above background technology.
The technical problem that the utility model solves is realized using following technical scheme：The utility model provides one kind
Double-walled spiral welded pipe, including pipeline body, the structure ecto-entad of described pipeline body include external anti-corrosion layer, outside carbon steel successively
Layer, cement interlayer, carbon steel internal layer and stainless steel layer, cement interlayer take shape in carbon steel outer layer and carbon steel internal layer by way of pouring
Between, carbon steel outer layer, carbon steel internal layer and stainless steel layer are welded by ribbon spiral coiling, in corresponding structure sheaf after welding
Outside formed spiral weld.
Described carbon steel outer layer and the thickness of carbon steel internal layer are 2-10mm.The thickness of described cement interlayer is 10-
200mm.The thickness of described stainless steel layer is 0.2-3mm.The spiral shell of spiral weld on described carbon steel internal layer and stainless steel layer
Away from identical, and two spiral welds shift to install.
The beneficial effects of the utility model are：The utility model is ensured by setting cement interlayer between two layers of carbon steel
Pipeline wall thickness is reduced on the basis of the outer pressure resistance of pipe side wall, so as to reduce the weight of pipeline, also reduces pipeline
Manufacture and construction cost.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure：1- external anti-corrosion layers, 2- carbon steel outer layers, 3- cement interlayers, 4- carbon steel internal layers, 5- stainless steel layers, 6- spiral weldings
Seam.
Embodiment
The utility model is described further below in conjunction with accompanying drawing：
The present embodiment includes pipeline body, and the structure ecto-entad of described pipeline body includes external anti-corrosion layer 1, carbon successively
Steel outer layer 2, cement interlayer 3, carbon steel internal layer 4 and stainless steel layer 5.
Compared with reinforced concrete structure, cement is filled between two layers of carbon steel and forms double tube structure, under having
Row advantage：
1) the utility model in the case where the nominal bore diameter of pipeline is certain, can significantly reduce the wall thickness of pipeline, increase simultaneously
Add the intensity (especially outer pressure resistance) of pipeline, so as to reduce being manufactured into for pipeline while pipeline combination property is improved
Originally, cost of transportation and construction cost.
2) reinforced concrete pipiline major defect is that pipe workpiece quality is unstable, and bell and spigot machining accuracy is poor, leak be present more
Phenomenon, and technical scheme described in the utility model is used, pipeline can use welding procedure to connect, stable connection, no seepage and no leakage.
3) limited by the coagulation soil physical property, the internal pressure strength of reinforced concrete pipiline is limited, sends out in actual use
Pipe explosion accident was given birth to, and in the utility model, cement interlayer 3 is taken shape in by way of pouring in carbon steel outer layer 2 and carbon steel
Between layer 4, carbon steel outer layer 2 and carbon steel internal layer 4 can be sticked together to composition closely using the high strength bond characteristic of cement material
Composite construction, there is good explosion-proof.
4) reinforced concrete pipiline exist more Surface layer's concrete come off framework of steel reinforcement exposed corrosion situations such as, tubing uses the longevity
Short, and the lateral surface flat smooth of the matrix of pipeline described in the utility model is ordered, passes through and outer anti-corrosion is set on pipeline matrix
Layer, stable external anti-corrosion layer 1 can be formed in pipeline outer-layer, possesses good antiseptic effect.The inner side of pipeline is provided with stainless steel
Layer 5, during pipeline construction, weld seam is filled by argon arc welding and with nickel wire, can will each pipeline welding is connected can be in pipeline
Continual continuous anticorrosive coat is formed, so as to fully ensure that the antiseptic effect of inner-walls of duct, extends the service life of pipeline.
5) easily there is crack when being pressurized in reinforced concrete pipiline, and causes pipeline breaking accident, and the utility model is adopted
With double-deck carbon steel structure, the ductility that steel itself possesses when pipeline is pressurized generally only to deform, without crack, from
And ensure the normal operation of pipe-line system before pipeline maintenance.
In addition, compared with the concrete duct of outer steel pipe, the utility model is provided with carbon steel in the inner side of cement interlayer 3
Internal layer 4, carbon steel internal layer 4 can be formed to cement interlayer 3 and fettered, and the difficulty of the pressure-rupturable of cement interlayer 3 be significantly increased, so as to change
The outer pressure resistance of kind pipeline, prevents pipeline buckle in compression from deforming.
Carbon steel outer layer 2, carbon steel internal layer 4 and stainless steel layer 5 are welded by ribbon spiral coiling, corresponding after welding
The outside of structure sheaf forms spiral weld 6.In the prior art, the steel pipe being relatively large in diameter is typically equal with diameter of steel tube by width
Bulk steel plate curling be welded, using this processing mode manufacture steel pipe when, more waste material can be produced, cause material
Waste, meanwhile, when above-mentioned technique is applied to thicker steel plate, the seam crossing of steel pipe is not flexible, and the circularity of pipeline is relatively difficult to ensure card,
Therefore difficulty of processing is bigger.And the utility model uses spiral welded technique, material is not only effectively saved, and due to being to adopt
It is made of the bending of continuous sheet material, therefore the radian of tube wall is evenly, circularity is also easier to ensure.
Described carbon steel outer layer 2 and the thickness of carbon steel internal layer 4 are 2-10mm, and carbon steel outer layer 2 and carbon steel internal layer 4 are in this reality
With being primarily subjected to circumferential drag load in new mechanical model, therefore the thickness of carbon steel outer layer 2 and carbon steel internal layer 4 need not mistake
It is thick.
The thickness of described cement interlayer 3 is 10-200mm.The thickness of described stainless steel layer 5 is 0.2-3mm.
Described carbon steel internal layer 4 is identical with the pitch of the spiral weld 6 on stainless steel layer 5, and two spiral welds 6 misplace
Set.
Below so that nominal bore diameter is 2000mm pipeline as an example, the property for the pipeline that concrete duct and the present embodiment are provided
Energy parameter is contrasted：
1st, with reference to GB/T11836-2009《Concrete and reinforced concrete drainage and sewer pipes》Specified in standard, performance parameter is most
The canonical parameter of III grade of good reinforced concrete pipiline is as follows：
| Nominal bore diameter (mm) | Wall thickness (mm) | Cracking load (KN/m) | Breaking load (KN/m) |
| 2000 | 200 | 181 | 272 |
In actual production, the cracking load and breaking load of pipeline are also only slightly higher than above-mentioned standard, therefore above-mentioned parameter
Possesses referential.
2nd, it is the parameter setting of pipeline described in the utility model is as follows：
Nominal bore diameter 2000mm, the thickness 7mm of carbon steel outer layer 2, carbon steel internal layer 4 thickness 7mm, cement thickness of interlayer 80mm,
In the case of being not provided with external anti-corrosion layer 1 and stainless steel layer 5, the average behavior parameter that experiment obtains pipeline is as follows：
| Nominal bore diameter (mm) | Wall thickness (mm) | Cracking load (KN/m) | Breaking load (KN/m) |
| 2000 | 94 | 320 | 382 |
It can be seen that using technical scheme described in the utility model, can be greatly improved in the case of by reduced down in thickness half
The outer pressure resistance of pipeline, simultaneously because the dosage of concrete substantially reduces, the weight of pipeline is greatly reduced.
Claims (5)
1. a kind of double-walled spiral welded pipe, including pipeline body, it is characterised in that：The structure ecto-entad of described pipeline body according to
It is secondary including external anti-corrosion layer (1), carbon steel outer layer (2), cement interlayer (3), carbon steel internal layer (4) and stainless steel layer (5), cement interlayer
(3) taken shape in by way of pouring between carbon steel outer layer (2) and carbon steel internal layer (4), carbon steel outer layer (2), carbon steel internal layer (4) and
Stainless steel layer (5) is welded by ribbon spiral coiling, and spiral weld is formed in the outside of corresponding structure sheaf after welding
(6)。
A kind of 2. double-walled spiral welded pipe according to claim 1, it is characterised in that：Described carbon steel outer layer (2) and carbon steel
The thickness of internal layer (4) is 2-10mm.
A kind of 3. double-walled spiral welded pipe according to claim 1, it is characterised in that：The thickness of described cement interlayer (3)
For 10-200mm.
A kind of 4. double-walled spiral welded pipe according to claim 1, it is characterised in that：The thickness of described stainless steel layer (5)
For 0.2-3mm.
A kind of 5. double-walled spiral welded pipe according to claim 1, it is characterised in that：Described carbon steel internal layer (4) and stainless
The pitch of spiral weld (6) in steel layer (5) is identical, and two spiral welds (6) shift to install.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720861867.5U CN206904393U (en) | 2017-07-14 | 2017-07-14 | Double-walled spiral welded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720861867.5U CN206904393U (en) | 2017-07-14 | 2017-07-14 | Double-walled spiral welded pipe |
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| Publication Number | Publication Date |
|---|---|
| CN206904393U true CN206904393U (en) | 2018-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720861867.5U Active CN206904393U (en) | 2017-07-14 | 2017-07-14 | Double-walled spiral welded pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314164A (en) * | 2017-07-14 | 2017-11-03 | 大庆新管科技有限公司 | double-walled spiral welded pipe |
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2017
- 2017-07-14 CN CN201720861867.5U patent/CN206904393U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314164A (en) * | 2017-07-14 | 2017-11-03 | 大庆新管科技有限公司 | double-walled spiral welded pipe |
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