CN204004847U - A kind of heavy caliber is given, waste pipe - Google Patents
A kind of heavy caliber is given, waste pipe Download PDFInfo
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- CN204004847U CN204004847U CN201420313202.7U CN201420313202U CN204004847U CN 204004847 U CN204004847 U CN 204004847U CN 201420313202 U CN201420313202 U CN 201420313202U CN 204004847 U CN204004847 U CN 204004847U
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- 239000010959 steel Substances 0.000 claims abstract description 190
- 239000004567 concrete Substances 0.000 claims abstract description 92
- 230000002708 enhancing effect Effects 0.000 claims description 7
- 239000011253 protective coating Substances 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
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Abstract
本实用新型公开了一种大口径给、排水管，所述大口径给、排水管包括内层钢筒、外层钢筒、增强结构、混凝土填充结构；所述增强结构设于内层钢筒和外层钢筒之间，所述增强结构具体为缠绕内层钢筒外并与内层钢筒和外层钢筒焊接固定的钢带，所述混凝土填充结构位于内层钢筒、外层钢筒和增强结构之间的空隙中；所述外层钢筒外还设有防护层。本实用新型所述的大口径给、排水管，抗腐蚀效果好，经久耐用，制作过程简单，在满足刚度和强度的同时降低重量和生产成本，具有较大的社会和经济价值。
The utility model discloses a large-diameter water supply and drainage pipe. The large-diameter water supply and drainage pipe includes an inner steel cylinder, an outer steel cylinder, a reinforcement structure and a concrete filling structure; the reinforcement structure is arranged on the inner steel cylinder Between the inner steel cylinder and the outer steel cylinder, the reinforced structure is specifically a steel belt wrapped around the inner steel cylinder and welded and fixed with the inner steel cylinder and the outer steel cylinder. The concrete filling structure is located between the inner steel cylinder and the outer steel cylinder. In the gap between the steel cylinder and the reinforced structure; the outer steel cylinder is also provided with a protective layer. The large-caliber water supply and drainage pipe described in the utility model has good anti-corrosion effect, durability, simple manufacturing process, reduces weight and production cost while satisfying rigidity and strength, and has great social and economic value.
Description
Technical field
The utility model belongs to municipal administration, industry, mining industry etc. and uses pipeline field, provides especially a kind of heavy caliber to, waste pipe.
Background technique
Along with the sustained and rapid development of China's economy, urban size expands rapidly, and supplying water appears in increasing city, draining difficulty.Build extensive water delivery engineering very urgent, adopting pipe laying waterline is necessary selection scheme.At present, alternative pipeline has steel pipe, concrete pipe, concrete reinforced pipe, prestressed concrete pipe.Wherein, the maximum nominal bore diameter that does not configure the concrete pipe of steel structure in tube wall only has 600mm, is only suitable for the little discharge capacity applications that supplies, and extensive water delivery engineering must be selected other several pipelines.The principal element of considering while selecting pipeline has: reliable degree, construction and two aspects of maintenance cost.
Steel pipe is large from heavy and light, rigidity, but cost high, be subject to environmental corrosion, later maintenance expense is high.For reducing engineering cost, builder is current is more to select steel and the compound pipeline of concrete.Except cost is low, bi-material has made up weakness each other mutually, performance strong point separately, thus make steel/concrete composite pipe there is very high bearing capacity, general all higher than the steel and the independent bearing capacity sum of concrete that form pipeline.In addition, the alkalescence due to concrete self can, so that passivation occurs on steel surface, improve the corrosion resistance of steel in concrete greatly.
But the steel structure concrete pipe of existing Production and application standard exists again deficiency at present, is restricting and is applying.Steel in steel structure concrete pipe mostly adopt high tensile steel at present, and object is to improve bearing capacity and reduce deadweight.As < < push pipe should meet < < JC/T540 > > with the Twisted Steel of stipulating in reinforced concrete pipe standards > >, stipulate that the minimum yield strength of Deformed Steel Bars used is 550MPa.And the yield strength of cold drawn wire in prestressed concrete pipe (PCCP) is generally more than 1550MPa, according to IISI's mechanical properties of materials---intensity is classified, this class steel structure belong to high-strength steel (270---700MPa) and super-high strength steel (>700MPa).Practice shows, this class steel counter stress corrosion cracking sensitivity.Stress corrosion cracking is the cracking that material causes under stress and corrosive environment acting in conjunction, and this is stress and the symphyogenetic result of corrosion.If only have an aspect, stress or medium effect, cracking destruction can not occur, but when the two synergy, but can ftracture very soon.Therefore, while there is stress corrosion cracking, stress may be very low, and the corrosivity of medium may be also very weak, and also, just due to so, stress corrosion cracking is often ignored, and causes contingency constantly to occur.Conventionally in specific industrial environment, there is stress corrosion cracking in Ordinary Steel, high-strength steel in physical environment, as there is stress corrosion cracking in rainwater, seawater.In addition, due to the development of the modern industry, material working environment is more and more harsher, and stress corrosion problem also becomes increasingly conspicuous.
The concrete pipe made from current standard, adopt high-strength steel structure is the in the situation that of its concrete degradation failure, and risk can constantly increase.And present stage to transporting on a large scale engineering, as the life requirement of waterline also improved a lot more in the past, from 20-30, be increased to 50-100, therefore, need the better tubing of development durability badly to meet the demands.
Model utility content
The purpose of this utility model is to solve the problem that prior art exists, the utility model is abandoned high tensile steel and is adopted Ordinary Steel material to increase its corrosion resistance, for guaranteeing its intensity, reform the steel structure mode of steel structure concrete composite pipe, the heavy caliber that a kind of high strength, corrosion-resistant, low-cost, low weight be provided is to, waste pipe.
The technical solution of the utility model is: a kind of heavy caliber is given, waste pipe, and described heavy caliber is given, waste pipe comprises internal layer steel cylinder 1, outer steel cylinder 2, strengthen structure 3, Concrete Filled structure 4; Described enhancing structure 3 is located between internal layer steel cylinder 1 and outer steel cylinder 2, described enhancing structure 3 is specially and is wound around the steel band that internal layer steel cylinder 1 is outer and be welded and fixed with internal layer steel cylinder 1 and outer steel cylinder 2, and described Concrete Filled structure 4 is at internal layer steel cylinder 1, outer steel cylinder 2 and strengthen in the space between structure 3; The outer protective coating that is also provided with of described outer steel cylinder 2.Protective coating prevents that outer steel cylinder 2 is corroded.
Preferably, the protective coating outside described outer steel cylinder 2 is specially outer concrete layer 5.
Preferably, in described internal layer steel cylinder 1, be also provided with internal layer concrete layer 6.
Preferably, described outer steel cylinder 2 is provided with a plurality of perforate 2a.Described perforate 2a makes the concrete of Concrete Filled structure 4 be connected with the concrete of outer concrete layer 5, and tie point plays anchorage effect to outer concrete layer 5, increases the adhesive strength of outer concrete layer 5 and outer steel cylinder 2.Referring to Fig. 4.
Preferably, described outer steel cylinder 2 outer surfaces are rough surface.Can make rough surface by the modes such as male and fomale(M&F) of outer steel cylinder 2 being carried out to sandblast hacking or make in axial direction, increase the roughness of outer steel cylinder 2, effectively increase the combination force of the outer concrete layer 5 outside outer steel cylinder 2.Referring to Fig. 5.
Preferably, the quantity of described steel band is for being more than or equal to 1.When the quantity of steel band is 1, described steel band at least completes a circumference and is wound around; When the quantity of steel band is many, described steel band is evenly arranged along internal layer steel cylinder 1.The quantity of steel band, along heavy caliber give, drainage pipe diameter to height depend on design strength, fabricating cost.Increasing steel band height can effectively increase and be subject to force intensity, needs to increase cost simultaneously.
Preferably, the spiral angle of described steel band and internal layer steel cylinder 1 is 5 °～90 °.Described spiral angle is welding line and this angle at internal layer steel cylinder 1 radial plane internal tangent of steel band on internal layer steel cylinder 1.As internal layer steel cylinder 1 is launched, for welding line and angle theta radially, referring to accompanying drawing 2 and accompanying drawing 3.When spiral angle is 90 °, steel band is along the 1 axial direction welding of internal layer steel cylinder.
Preferably, the cross section of described steel band is specially rectangular, trapezoidal, waveform, U-shaped or V-arrangement.Make tubing there is excellent hoop rigidity and intensity.
Preferably, described steel band along heavy caliber give, drainage pipe diameter to height be 20mm～150mm.When meeting rigidity and hardness, save raw material, reduce weight simultaneously.
Described Concrete Filled structure 4 is self-compact concrete more than C40.Self-compact concrete is a kind of of high performance concrete, and its topmost character is under deadweight, need not vibrate, and the space in filling template, forms closely knit concrete structure voluntarily.In addition it also has good mechanical property and endurance quality, this is a kind ofly from concrete mix, to start until the high performance concrete all considered of the spreadable life hardening comprehensively, its superiority is mainly manifested in: improve concrete density and durability, avoid Lou shaking, cross the personal factor in the construction such as shake and arrangement of reinforcement is intensive, structure forms the impacts of adverse condition on construction quality such as complexity; Reduce operation intensity, save labour, facility and power consumption vibrate; Can eliminate the noise that vibrates, improve environment, alleviate the contradiction that construction disturbs residents; Simplify working process, the reduction of erection time, raise the efficiency.
Self-compact concrete, according to the code requirement of relevant self-compact concrete preparation and construction, adopt slump 250mm, divergence 600mm, the poor 25mm in middle limit, flows down time 6-16S, and four indices is feasible, there are good cohesive quality, mobility and water retention, make concrete self-compacting.
The utlity model has following useful effect:
Heavy caliber described in the utility model is given, waste pipe, and anti-corrosion effects is good, durable in use, and working process is simple, reduces weight and cost of production when meeting Rigidity and strength, has larger society and economic value.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment's structural representation;
Fig. 2 is the combination schematic diagram of the utility model embodiment internal layer steel cylinder and steel band;
Fig. 3 is the welding line of the utility model embodiment steel band on internal layer steel cylinder and angle schematic diagram radially;
Fig. 4 is the rough schematic surface of the outer steel cylinder of the utility model embodiment;
Fig. 5 is with the schematic diagram of perforate on the outer steel cylinder of the utility model embodiment;
Fig. 6 is the schematic diagram of the utility model embodiment pipe joint processing mode.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
Embodiment 1
As shown in Fig. 1-6, a kind of heavy caliber is given, waste pipe, and described heavy caliber is given, waste pipe comprises internal layer steel cylinder 1, outer steel cylinder 2, strengthen structure 3, Concrete Filled structure 4; Described enhancing structure 3 is located between internal layer steel cylinder 1 and outer steel cylinder 2, described enhancing structure 3 is specially and is wound around the steel band that internal layer steel cylinder 1 is outer and be welded and fixed with internal layer steel cylinder 1 and outer steel cylinder 2, and described Concrete Filled structure 4 is at internal layer steel cylinder 1, outer steel cylinder 2 and strengthen in the space between structure 3.
The outer outer concrete layer 5 that is provided with of described outer steel cylinder 2.
In described internal layer steel cylinder 1, be also provided with internal layer concrete layer 6.
Described outer steel cylinder 2 is provided with a plurality of perforate 2a.Described perforate 2a makes the concrete of Concrete Filled structure 4 be connected with the concrete of outer concrete layer 5, and tie point plays anchorage effect to outer concrete layer 5, increases the adhesive strength of outer concrete layer 5 and outer steel cylinder 2.Referring to Fig. 4.
Preferably, described outer steel cylinder 2 outer surfaces are rough surface.Can make rough surface by the modes such as male and fomale(M&F) of outer steel cylinder 2 being carried out to sandblast hacking or make in axial direction, increase the roughness of outer steel cylinder 2, effectively increase the combination force of the outer concrete layer 5 outside outer steel cylinder 2.Referring to Fig. 5.
The quantity of described steel band is for being more than or equal to 1.When the quantity of steel band is 1, described steel band at least completes a circumference and is wound around; When the quantity of steel band is many, described steel band is evenly arranged along internal layer steel cylinder 1.The quantity of steel band, along heavy caliber give, drainage pipe diameter to height depend on design strength, fabricating cost.Increasing steel band height can effectively increase and be subject to force intensity, needs to increase cost simultaneously.
The spiral angle of described steel band and internal layer steel cylinder 1 is 5 °～90 °.Described spiral angle is welding line and this angle at internal layer steel cylinder 1 radial plane internal tangent of steel band on internal layer steel cylinder 1.As internal layer steel cylinder 1 is launched, for welding line and angle theta radially, referring to accompanying drawing 2 and accompanying drawing 3.When spiral angle is 90 °, steel band is along the 1 axial direction welding of internal layer steel cylinder.
The cross section of described steel band is specially as rectangular, trapezoidal, waveform, U-shaped or V-arrangement.Make tubing there is excellent hoop rigidity and intensity.
Described steel band along heavy caliber give, drainage pipe diameter to height be 20mm～150mm.When meeting rigidity and hardness, save raw material, reduce weight simultaneously.
Described Concrete Filled structure 4 is self-compact concrete more than C40.Self-compact concrete is a kind of of high performance concrete, and its topmost character is under deadweight, need not vibrate, and the space in filling template, forms closely knit concrete structure voluntarily.In addition it also has good mechanical property and endurance quality, this is a kind ofly from concrete mix, to start until the high performance concrete all considered of the spreadable life hardening comprehensively, its superiority is mainly manifested in: improve concrete density and durability, avoid Lou shaking, cross the personal factor in the construction such as shake and arrangement of reinforcement is intensive, structure forms the impacts of adverse condition on construction quality such as complexity; Reduce operation intensity, save labour, facility and power consumption vibrate; Can eliminate the noise that vibrates, improve environment, alleviate the contradiction that construction disturbs residents; Simplify working process, the reduction of erection time, raise the efficiency.
Self-compact concrete, according to the code requirement of relevant self-compact concrete preparation and construction, adopt slump 250mm, divergence 600mm, the poor 25mm in middle limit, flows down time 6-16S, and four indices is feasible, there are good cohesive quality, mobility and water retention, make concrete self-compacting.
Embodiment 2
Working process:
(1) steel cylinder moulding
First make internal layer steel cylinder 1, adopt spiral steel cylinder coil welding machine to be welded internal layer steel cylinder 1, when welding internal layer steel cylinder 1, along internal layer steel cylinder 1 weld joint spiral welded steel band, steel band is evenly arranged along internal layer steel cylinder 1, and steel band quantity can be controlled between 1-15 bar, when the quantity of steel band is 1, steel band at least completes a circumference and is wound around, and ribbon spiral angle is controlled between 5 °～90 °.While adopting spiral welded, be according to internal layer steel cylinder 1 diameter, ribbon spiral angle, steel band used is wide and the steel band of required overlap joint seam width calculates internal layer steel cylinder 1 spiral girth (each pitch) to guarantee welding quality and economic materials.
(2) weld outer steel cylinder
Along steel band outer, be welded outer steel cylinder 2, adopt spiral steel cylinder coil welding machine to be welded outer steel cylinder 2, inside and outside steel cylinder 1 forms a double-deck steel cylinder of integral body by steel band.
(3) filling concrete
In order to guarantee concrete smooth perfusion and fully closely knit, adopt self-compact concrete more than C40, from top to bottom disposable form outer concrete layer 5, internal layer concrete layer 6, Concrete Filled structure 4.
Embodiment 3
The processing mode of push pipe joint:
The utility model has also carried out new design to pipe joint, sees Fig. 6.Because pipe main body has adopted bitubular steel cylinder, the utility model interface tube adopts rigid interface 11 (steel loop), and steel ring welding, on outer steel cylinder 2, is adopted to two weld seams.The free part 11a of interface 11, higher than interface 11 welding portion 11b, guarantees that space socket joint puts in place like this.A side at the joint socket 12 not welding, leaves the hole for injecting glue 13 for sealing in advance.After joint socket 12 is in place, from managing interior employing high-pressure injection plastic equipment, sealer 14 is injected in joint socket 12.Sealer 14 can be selected the solid types such as Thiokol, and solidifying within the time of construction requirement confirms to meet seal request after bulge test.For joint socket 12, anticorrosion very crucial, may be the key area of corrosion here.Therefore, after having welded joint socket 12, use heavy corrosion coating, as non-solvent epoxy etc. carries out anti-corrosion protection to joint socket 12, especially butt welded seam place, should strengthen preservative treatment.After joint socket 12 is in place, check the anticorrosion situation of joint socket 12, if met the demands, outside joint socket 12, carry out concrete and be coated, during coated concrete, need to adopt outer band.
Embodiment 4
The heavy caliber of following size of take is below given, waste pipe is example, contrasts weight and the cost of production of different pipelines:
Heavy caliber is given, waste pipe is of a size of: heavy caliber is 3000mm to, waste pipe pipe inner diameter, and pipe axial length is 4000mm, and pipe thickness is 224mm;
Wherein: the steel plate thickness of internal layer steel cylinder 1 and outer steel cylinder 2 is 2mm; The thickness of internal layer concrete layer 6 and outer concrete layer 5 is 50mm; Steel band along heavy caliber give, drainage pipe diameter to height be 120mm, the thickness of Concrete Filled structure 4 is 120mm.
The number of steel band is 10, along internal layer steel cylinder 1, is evenly arranged, and spiral angle is 30 °,
Take double-layer wire PCCP as unit weight, and the PCCP of weight of the present utility model and double-layer wire pipe approaches, and higher than individual layer steel wire, PCCP manages approximately 3%.The concrete reinforced pipe of using far below jacking, weight declines approximately 30%, and this can reduce transportation and construction cost for jacking construction.
The market price according to the fourth quater in 2013, comprises processing cost, and the price of steel pipe, far above steel and concrete structure pipe, doubles above.And in steel and concrete structure pipe, the reinforced concrete cost of pipe jacking method is the highest, as adopted the utility model structure, cost 25% left and right that will decline.In addition, the utility model cost is managed low 7% left and right compared with double-layer wire PCCP, than individual layer steel wire PCCP, manages high 9% left and right.
Embodiment 5
Heavy caliber is given, waste pipe model test is calculated:
Through the calculating of finite element software, no matter this pipeline configuration is all in a safe condition under Construction State or under normal operating condition, and have larger safety coefficient.Preliminary proof rationality and the feasibility of this project organization.But because there is the problems such as model simplification and calculus of approximation in the numerical simulation of finite element software, may also can there is different with the working condition of under ground piping reality, in order further to verify the rationality of designed underground pipeline structures, to its carry out laboratory experiment.
According to the principle of similitude of model test (comprise that geometric similarity, quality are similar, physical similarity, load similar), formulated following test model.
Key dimension has:
(1) heavy caliber is given, waste pipe pipe inner diameter is 362mm, and pipe axial length is 700mm, and pipe thickness is 94mm, manages outer diameter 550mm;
(2) steel band height is 30mm, and thickness of strips is 2mm, and steel band quantity is 2, and spiral angle is 30 °;
(3) outer steel cylinder 2 steel plate thickness are 2mm, and internal layer steel cylinder 1 steel plate thickness is 2mm;
(4) outer concrete layer 5 thickness are 30mm, and internal layer concrete layer 6 thickness are 30mm, and Concrete Filled structure 4 thickness are 30mm.
Main material has:
(1) steel band, outer steel cylinder 2, internal layer steel cylinder 1 adopt Q235 hot rolled steel sheet;
(2) self-compact concrete that outer concrete layer 5, internal layer concrete layer 6, Concrete Filled structure 4 adopt more than C40.
Uniaxial compression test is the extreme stressing conditions of simulation pipeline jacking construction, namely least favorable stressing conditions.From uniaxial compression test, it is 2700KN-2800KN that test specimen axially allows maximum top power.
Radial compression test is at radially worst stressing conditions, because now manage waist place, can have larger tensile stress, thereby destroys pipeline.And in actual pipeline military service process, thereby this place has the pressure stress of environment, make pipeline can bear larger pressure stress.From radial compression, test, it is 400KN that test specimen radially allows pressure maximum, and this value also can meet the radial pressure requirement that pipeline is on active service.
Below the present embodiment heavy caliber is given, waste pipe model with adopting, commercial reinforced concrete push pipe carries out maximum top force rate,
In < < Water and Waste Water Engineering pipe-jacking technology rules > >, according to concrete reinforced pipe ultimate limit states computational rules, pipeline allows maximum top power formula to be
In formula: F
dc-concrete duct allows top power design load.
φ
1-concrete material compressive strength reduction coefficient, desirable 0.90.
φ
2-eccentric compression intensity improves coefficient, desirable 1.05.
φ
3-material fragility coefficient, desirable 0.85.
φ
5-concrete strength standard is adjusted coefficient, desirable 0.79.
F
c-concrete compression Intensity Design value.
A
pthe minimum effective force area of-pipeline.
γ
qd-top power partial safety factor, desirable 1.3.
Calculate concrete duct under line size, concrete strength same case and allow top power design load.Here concrete compression Intensity Design value is taken as 40KN/m
2, the minimum effective force area A of pipeline
p=1/4 π [550
2-362
2]=1.346 ' 10
5mm
2.
Concrete duct allows top power design load F
dcfor 2105.5KN.
Contrast learns, under measure-alike, concrete strength same case, the present embodiment heavy caliber is given, waste pipe model allows top power design load to allow the high 28.2%-32.9% of top power design load than concrete duct.
Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (10)
- Heavy caliber give, a waste pipe, it is characterized in that: described heavy caliber comprises internal layer steel cylinder (1), outer steel cylinder (2), strengthens structure (3), Concrete Filled structure (4) to, waste pipe; Described enhancing structure (3) is located between internal layer steel cylinder (1) and outer steel cylinder (2), described enhancing structure (3) is specially and is wound around the steel band that internal layer steel cylinder (1) is outer and be welded and fixed with internal layer steel cylinder (1) and outer steel cylinder (2), and described Concrete Filled structure (4) is arranged in the space between internal layer steel cylinder (1), outer steel cylinder (2) and enhancing structure (3); The outer protective coating that is also provided with of described outer steel cylinder (2).
- According to a kind of heavy caliber claimed in claim 1 give, waste pipe, it is characterized in that: the outer protective coating of described outer steel cylinder (2) is specially outer concrete layer (5).
- According to a kind of heavy caliber claimed in claim 1 give, waste pipe, it is characterized in that: in described internal layer steel cylinder (1), be also provided with internal layer concrete layer (6).
- According to a kind of heavy caliber claimed in claim 2 give, waste pipe, it is characterized in that: in described internal layer steel cylinder (1), be also provided with internal layer concrete layer (6).
- According to a kind of heavy caliber claimed in claim 2 give, waste pipe, it is characterized in that: described outer steel cylinder (2) is provided with a plurality of perforates (2a) and/or outer steel cylinder (2) outer surface is rough surface.
- According to a kind of heavy caliber claimed in claim 4 give, waste pipe, it is characterized in that: described outer steel cylinder (2) is provided with a plurality of perforates (2a) and/or outer steel cylinder (2) outer surface is rough surface.
- According to the arbitrary described a kind of heavy caliber of claim 1-6 give, waste pipe, it is characterized in that: the quantity of described steel band is for being more than or equal to 1.
- According to a kind of heavy caliber claimed in claim 7 give, waste pipe, it is characterized in that: the spiral angle of described steel band and internal layer steel cylinder (1) is 5 °～90 °.
- According to a kind of heavy caliber claimed in claim 8 give, waste pipe, it is characterized in that: the cross section of described steel band is specially rectangular, trapezoidal, waveform, U-shaped or V-arrangement.
- According to a kind of heavy caliber claimed in claim 9 give, waste pipe, it is characterized in that: described steel band along heavy caliber to, drainage pipe diameter to height be 20mm～150mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420313202.7U CN204004847U (en) | 2014-06-13 | 2014-06-13 | A kind of heavy caliber is given, waste pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420313202.7U CN204004847U (en) | 2014-06-13 | 2014-06-13 | A kind of heavy caliber is given, waste pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017181713A1 (en) * | 2016-04-19 | 2017-10-26 | 淄博环能海臣环保技术服务有限公司 | Thermally insulated corrosion-resistant non-metallic composite pipe with tension-resistant shell internally provided with prestressed expansive cement |
| CN108253205A (en) * | 2016-12-28 | 2018-07-06 | 北京市水利规划设计研究院 | Pipeline and its component |
-
2014
- 2014-06-13 CN CN201420313202.7U patent/CN204004847U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017181713A1 (en) * | 2016-04-19 | 2017-10-26 | 淄博环能海臣环保技术服务有限公司 | Thermally insulated corrosion-resistant non-metallic composite pipe with tension-resistant shell internally provided with prestressed expansive cement |
| CN108253205A (en) * | 2016-12-28 | 2018-07-06 | 北京市水利规划设计研究院 | Pipeline and its component |
| CN108253205B (en) * | 2016-12-28 | 2024-05-14 | 北京市水利规划设计研究院 | Pipeline and assembly thereof |
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