CN208845883U - A kind of steel modeling slip casting multiple tube for fluid heating snow melt - Google Patents
A kind of steel modeling slip casting multiple tube for fluid heating snow melt Download PDFInfo
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- CN208845883U CN208845883U CN201821334891.4U CN201821334891U CN208845883U CN 208845883 U CN208845883 U CN 208845883U CN 201821334891 U CN201821334891 U CN 201821334891U CN 208845883 U CN208845883 U CN 208845883U
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Abstract
The utility model discloses a kind of steel for fluid heating snow melt to mould slip casting multiple tube, is formed in plastic inner pipe and metal outer pipe between by plastic inner pipe, metal outer pipe and by slip casting and fills up the concrete layer in space between the two and is constituted.The multiple tube long service life, corrosion resistance is strong, small on the influence of the fracture resistance of concrete road surface, and heating conduction is strong.
Description
Technical field
The utility model relates to pavement snow melting technical fields, mould note more particularly to a kind of steel for fluid heating snow melt
Starch multiple tube.
Background technique
It is using dynamical system that the energy of external heat source is flexibly defeated as carrier progress using hot fluid that fluid heats snow-melting system
It is equipped with realization snow melt, compared with dispensing the passive snow melt mode such as Chemical deicers, mechanical deicing's snow method, fluid heats snow melt system
System can carry out preventative active according to snowfall and weather condition and remove the snow, and system controllability and measurability is strong, energy utilization rate is high, heat source is wide
General (can be conventional heat sources or renewable heat source), simple installation.
It is to recycle hot fluid in the pipeline being embedded in inside face that fluid, which heats snow-melting system, is passed through
Heat convection heat exchange method at tube wall makes the heat transfer of fluid give road face structure, will by the heat transfer inside structure sheaf
Heat transfer is to road body surface face, and then logical heat transfer and ice and snow carry out heat exchange, to achieve the purpose that deicing or snow melting.Herein
In system, the low-freezings solution such as aqueous solution of propylene glycol, glycol water can be used as circulatory mediator；And it is embedded in face and works as
In tubing, good heatproof, corrosion resistance and good intensity and flexibility are needed, so as in construction and installation
Cheng Dangzhong and using working stage there is good resistances tube fluid to corrode and resist pavement loading such as automobile, winged
The ability of machine load action.
Currently, fluid heating pipeline tubing generally has metal tube such as steel pipe, PSP steel-plastics composite pipe and plastic tube etc..
Steel pipe has intensity height, and linear expansion coefficient and concrete are close, is mainly used for heat donor fluid conveying and uses, thermal conductivity
It can be strong.But since fluid generally adds anti-icing fluid, there is microcorrosion, therefore steel pipe is not suitable for making directly as heating tube
With.
It is raw material that plastic tube, which is usually with synthetic resin, that is, polyester, stabilizer, lubricant, plasticizer is added etc., with
The method of " modeling " forms in tuber through extrusion process, be mainly used as building construction tap water supply system piping, draining,
Exhaust and blowdown sanitary pipe, subsoil drain system, rain pipe and electric wire install matched penetration pipe etc..Plastic tube, point
For thermoplastic pipes and thermosetting plastics pipe two major classes.Belonging to thermoplastic has polyvinyl chloride pipe, polyethylene pipe, polypropylene
Pipe, polyformaldehyde pipe etc.；Belonging to heat cured has phenola plastics pipe etc..The major advantage of plastic tube be good corrosion resisting property, light weight, at
Type convenience, handling ease, the pipeline flexibility of thermoplastics type and ductility are relatively preferable；But the heating conduction of plastic tube and anti-folding
Compressive property is poor.The impact force of traffic loading is larger on blocking the way face or pavement slab between faulting of slab ends quiet shifting when, the resistance of plastic tube
Ability is weaker, there is the risk for being cut off and forming leakage.
PSP steel-plastic composite pressure pipe is novel metal and the compound tubing of plastics, interior generally using welded still pipe as middle layer
Outer layer is vinyon, using hot melt adhesive special, the tubing being combined into one by extruding forming method.The tubing overcomes
Easy-to-rust existing for steel pipe, have pollution, heaviness, service life it is short it is low with intensity existing for plastic tube, swell increment is big, easily-deformable
Defect, and the Common advantages with steel pipe and plastic tube, if oxygen barrier is good, has higher rigidity, underground pipe is easy detection etc..
But PSP steel-plastics composite pipe there are integral strengths smaller, the poor disadvantage of heating conduction.In addition when using PSP steel-plastics composite pipe
When, to long-distance transmission pipeline, longest 12m need to have hot melt or electric fusion joint at one, by taking F class runway designs width 60m as an example,
Need connector at least 4.If needing connector at one at 5m in conjunction with runway working procedure, 60m is needed at least 11
Connector.More connector will cause fluid leakage risk.
Therefore, it is necessary to novel pipelines, and to solve, above-mentioned there are technical problems.
Utility model content
In order to overcome disadvantage mentioned above, the utility model aim is to provide a kind of steel modeling slip casting for fluid heating snow melt
Multiple tube and preparation method, the multiple tube long service life, corrosion resistance is strong, influences on the fracture resistance of concrete road surface
Small, heating conduction is strong.
One side according to the present utility model provides a kind of steel modeling slip casting multiple tube for fluid heating snow melt, by moulding
Expect inner tube 30, metal outer pipe 10 and is formed between plastic inner pipe and metal outer pipe by slip casting and fills up space between the two
Concrete layer 20 constituted.
An embodiment according to the present utility model, wherein the plastic inner pipe 30 is polyethylene pipe.
An embodiment according to the present utility model, wherein the polyethylene pipe is De25 plastic tube.
An embodiment according to the present utility model, wherein the metal outer pipe is DN32 steel pipe.
An embodiment according to the present utility model, wherein the length of steel modeling slip casting multiple tube is 1-60 meters.
An embodiment according to the present utility model, wherein steel modeling slip casting multiple tube is eccentric pipe, the plastics
The cross section geometric center of inner tube is not overlapped with the cross section geometric center of the metal outer pipe.
An embodiment according to the present utility model, wherein the plastic inner pipe locally reclines with the metal outer pipe.
An embodiment according to the present utility model, wherein press mortar used in slip casting or grouting material symbol
Standardization TB/T3192-2008 or JTG/TF502011.
An embodiment according to the present utility model, wherein the press mortar or grouting material include H-60 mud jacking
Agent.
An embodiment according to the present utility model, wherein the thermal coefficient of steel modeling slip casting multiple tube is greater than
1.0W/ (mK), such as 2.0,3.0,4.0,5.0W/ (mK) etc..
According to other side, a kind of preparation method of steel modeling slip casting multiple tube for fluid heating snow melt is also provided,
The steel modeling slip casting multiple tube is formed between plastic inner pipe and metal outer pipe by plastic inner pipe, metal outer pipe and by slip casting
And the concrete layer for filling up space between the two is constituted, which comprises
The metal outer pipe is provided；
The plastic inner pipe is provided, and plastic inner pipe is placed among metal outer pipe；With
There is provided press mortar or grouting material, and by its pressure injection between the plastic inner pipe and metal outer pipe in space,
To form the concrete layer.
An embodiment according to the present utility model, wherein the press mortar or grouting material comply with standard TB/
T3192-2008 or JTG/TF502011.
An embodiment according to the present utility model, wherein the press mortar or grouting material include H-60 mud jacking
Agent.
An embodiment according to the present utility model, wherein the pressure when pressure injection is about 1.0~1.4MPa, preferably
For 1.1~1.3MPa, more preferably 1.2MPa.
An embodiment according to the present utility model, wherein the injection speed when pressure injection is about 0.3-0.7m/s,
Preferably 0.5m/s.
An embodiment according to the present utility model, wherein the steel for fluid heating snow melt moulds slip casting multiple tube
Preparation method further include being blocked the both ends of the plastic tube, and water is injected in it before the pressure injection.
An embodiment according to the present utility model, wherein the pressure for injecting water in the plastic tube is no more than
0.4MPA。
An embodiment according to the present utility model, wherein the steel for fluid heating snow melt moulds slip casting multiple tube
Preparation method also further include adding solids in the plastic tube before closure, such as add thinner mass such as steel
Silk, for adjusting the weight of plastic tube.
The utility model solves many technical problems tubing that fluid heating snow-melting system was selected in the past present in, produces
Give birth to beneficial technical effect:
1) service life can be up to 50 years.The service life of plastic tube can be up to 50 years, therefore by the plastics of innermost layer
Pipe undertakes heating fluid conveying function, it can be achieved that the pipeline more than road face design period (generally 30 years) uses duration.
2) corrosion resistance is strong.Steel pipe corrosion resistance itself is weaker, is not suitable for conveying heating fluid, plastic tube corrosion resistant
Erosion ability is most strong, can be used for directly transporting fluid.Using steel pipe as the outer protective shell of plastic tube, mortar is filled between the two, it can
Further strengthen the intensity and resistance to corrosion of compound pipeline complex pipeline.
3) " steel mould slip casting multiple tube " of the utility model preferably, far better than PSP pipe and plastic tube.Therefore it can be realized
Good heat transfer and snow melt effect.
Detailed description of the invention
Fig. 1 is to mould slip casting composite pipe structure according to the steel for fluid heating snow melt of one embodiment of the utility model
Schematic diagram.
Fig. 2 is the system according to the steel modeling slip casting multiple tube for fluid heating snow melt of one embodiment of the utility model
The flow diagram of Preparation Method.
Fig. 3 is according to the structure for detecting pipeline heating conduction using sandbox model of one embodiment of the utility model
Schematic diagram.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but not as practical to this
Novel restriction.
Fig. 1 is the steel modeling slip casting multiple tube knot for fluid heating snow melt of an embodiment according to the present utility model
Structure schematic diagram.As shown in Figure 1, steel modeling slip casting multiple tube includes three parts namely plastic inner pipe 30, metal outer pipe 10 and mixes
Solidifying soil layer 20, wherein the concrete layer 20 is formed between plastic inner pipe and metal outer pipe by slip casting and is filled up therebetween
Space, flowed for providing the high temperature fluid 40 of thermal energy in plastic inner pipe 30.
Metal outer pipe 10 for example can be steel pipe, such as DN32 steel pipe, specifically can according to need to select steel appropriate
Tubing type.The length of steel pipe and diameter etc. can select according to specific needs, such as when the longer length such as 60 of needs
More steel pipes can be carried out silk and connect or weld by meter Shi.Metal outer pipe 10 is used as outer layer pipe, can mould slip casting multiple tube for steel
Good intensity and protection are provided.
Plastic inner pipe 30 can be thermoplastic pipes and thermosetting plastics pipe, such as can be polyvinyl chloride pipe, poly- second
Alkene pipe, PA tube, polyformaldehyde pipe, phenola plastics pipe etc..The internal diameter and length of plastic tube, which can according to need, to be selected, example
If its internal diameter can be selected with the design discharge of snow melt fluid, but its outer diameter should be suitably less than above-mentioned metal outer pipe
Internal diameter.Such as difference between the two can be 5mm-20mm, such as 6mm, 7mm, 8mm, 10mm, 15mm etc..Art technology
Personnel can according to need to be readily selected diameter appropriate.The length of plastic inner pipe 30, which can according to need, comes appropriate section
It takes, such as 1m, 5m, 10m, 30m, 60m etc..
Such as 30 major advantage of plastic inner pipe is good corrosion resisting property, light weight, convenient formation, handling ease, thermoplastics type
Pipeline flexibility and ductility are relatively preferable.An embodiment according to the present utility model, wherein the plastic inner pipe 30 is
De25 polyethylene pipe.
In order to ensure snow melt effect, enhance it is thermally conductive, the utility model outer tube (steel pipe) and heating tube (plastic tube) it
Between void layer be filled it is closely knit.As shown in Figure 1, the multiple tube of the utility model further includes being arranged in the plastic inner pipe 30
The concrete layer 20 between metal outer pipe 10.The concrete layer 20 can be formed in by slip casting plastic inner pipe and metal outer pipe it
Between and fill up space between the two.Concrete layer 20 makes plastic inner pipe 30 fixed, also provides support for metal outer pipe 10, makes
It is firmer on the whole to obtain multiple tube, realizes resistance to compression shock resistance, corrosion-resistant strong, good heat conductivity and long service life etc.
Technical effect.
More specifically, the concrete layer 20 of the utility model utilizes press mortar or grouting material, moulded by slip casting
It is formed between material inner tube 30 and metal outer pipe 10.Be perfused the concrete layer 20 formed after mud jacking it is closely knit, without hollowing, bubble-free,
And integrated piping is in close contact ungauged regions without deformation, the outer wall and injecting paste material of outer tube wall and inner tube.In addition, integral tube
Road also has good thermal conductivity, hence it is evident that manages better than plastic tube or PSP, such as the thermal coefficient that can have is greater than 1.0W/
Such as 2.0W/ (mK), 3.0W/ (mK), 4.0W/ (mK), 5.0W/ (mK), 6.0W/ (mK) etc. (mK),.
For this purpose, can for example preferably conform to those of standard TB/T3192-2008 or JTG/TF502011 press mortar or
Grouting material, more preferably those include the press mortar or grouting material of H-60 grouting agent.Introduction based on the utility model is simultaneously
In conjunction with the prior art, those skilled in the art can be readily selected suitable press mortar or grouting material.
As shown in Figure 1, the steel modeling slip casting multiple tube of the utility model can be eccentric pipe namely the plastic inner pipe 30
Cross section geometric center is not overlapped with the cross section geometric center of the metal outer pipe 10.It means that concrete layer 20 is in plastics
Thickness between pipe 30 and metal outer pipe 10 is not uniform.Such as shown in figure, the thickness of concrete layer 20 from top to bottom by
Gradual change is small, and upper thickness is less than the thickness of lower part.Further, the top section of plastic inner pipe 30 can even recline outside metal
The inner wall of pipe 10.
When by such eccentric pipe according to embedment underground as shown in the figure, due to accommodating the plastic inner pipe 30 of high temperature fluid more
Add close to the metal outer pipe 10 that even reclines, therefore the heating conduction on the top of multiple tube is more preferable, is more easier thermal energy conduction extremely
Ground can be realized better snow melt effect.
2 it is further described the formation process of the utility model multiple tube with reference to the accompanying drawing.With reference to attached drawing 2, this is practical
The preparation method of the novel steel modeling slip casting multiple tube for fluid heating snow melt may include steps of:
Firstly, providing metal outer pipe 10, can according to need to select metal pipe material appropriate such as DN32 steel pipe.Steel pipe
Length and diameter etc. can select according to specific needs, can will such as when needing longer such as 60 meters of length
More steel pipes are welded；
Plastic inner pipe 30 is provided, and plastic inner pipe is placed among metal outer pipe, such as De25 polyvinyl chloride can be provided
Whole plastic tube is carried out poling using the manually or mechanically modes such as traction by pipe.The diameter of plastic tube can be according to snow melt fluid
Design discharge selected, outer diameter is suitably less than the internal diameter of above-mentioned metal outer pipe.Such as difference between the two can be
5mm-30mm, such as 6mm, 7mm, 8mm, 10mm, 1mm, 20mm, 25mm etc..The length of plastic inner pipe 30 can be according to metal
The degree of outer tube intercepts, for example, can the length appropriate that metal outer pipe is slightly longer than, reserve plastic tube two sides end length, so as to
In subsequent operation；
There is provided press mortar or grouting material, and by its pressure injection between the plastic inner pipe and metal outer pipe in space,
To form the concrete layer 20 for being full of the space.Press mortar or grouting material can choose those and comply with standard TB/
The material of T3192-2008 or JTG/TF502011, preferably those include the press mortar or grouting material of H-60 grouting agent.It will
The press mortar or grouting material modulated is by grouting equipment indentation pipeline clearance layer (namely the plastic inner pipe and metal outer pipe
Between space).Can select grouting pressure appropriate as the case may be, for example, can for 1.0~1.4MPa, for example
1.1MPa,1.2MPa,1.3MPa.It can control injection speed, such as 0.3-0.7m/s, such as 0.5m/s appropriate or so, and
And with suitable control and slip casting time of every root canal can be selected, such as every root canal the slip casting time can at 1.5~3 minutes, 2~
2.5 minute.Grouting equipment is well known to those skilled in the art, and is not repeated herein.
Due to the comprehensive function of the gravity and buoyancy of fluid, plastic inner pipe 30 floats bias during slip casting, thus
Cause to be formed by steel modeling slip casting multiple tube to be outside the cross section geometric center and the metal of eccentric pipe namely the plastic inner pipe
The cross section geometric center of pipe is not overlapped or even the top of the plastic inner pipe and the inner wall of the metal outer pipe locally recline.When
When by such eccentric pipe according to embedment underground as shown in Figure 1, due to accommodating the plastic inner pipe 30 of high temperature fluid closer to very
To the metal outer pipe 10 that reclines, therefore the heating conduction on the top of multiple tube is more preferable, is more easier thermal energy conduction to ground, can
Realize better snow melt effect.
Preferably, method according to the present utility model further includes sealing the both ends of the plastic inner pipe 30 before slip casting
It is stifled, and water is injected in it.The weight of water adjustable plastic inner pipe is injected, it is possible thereby to adjust plastic inner pipe in slip casting
Eccentric degree.Mass such as steel wire etc. can certainly be added in plastic inner pipe, to adjust the weight of plastic inner pipe, adjust
Save eccentric degree, thus it is even possible that multiple tube it is not eccentric.Meanwhile water filling additionally aids the inside for keeping plastic inner pipe 30
Pressure prevents from flattening plastic inner pipe 30 during slip casting.,
Those skilled in the art should be readily appreciated that.It can choose water injection pressure appropriate, prevent water injection pressure excessively high and cause
Plastics tube swelling, such as the pressure of injection water can be no more than 0.4MPa.It, can be by the water in plastic tube after slurry condensation
Or other mass remove.
The utility model is further described below with reference to embodiment.
Embodiment-preparation of steel modeling slip casting multiple tube and the detection of performance parameter
Material and parameter:
Metal outer pipe be DN32 welded still pipe, 24 meters of length, outer diameter 41.23mm, wall thickness 2.47mm；
Plastic inner pipe be De25 polyethylene pipe, 24 meters of length, outer diameter 24.57mm, wall thickness 3.1mm；
Injecting paste material: the weight ratio of 30:10:90 measures water, grouting agent (H-60), cement, reference standard TB/T3192-
2008；
Grouting pressure: about 1.2MPa, injection speed: about 0.5m/s or so；
Water is full of in plastic inner pipe, both ends block, overpressure about 0.4MPa；
Steel modeling slip casting multiple tube is prepared using the method for the utility model, multiple samples are averaged, finally obtained steel
The length for moulding slip casting multiple tube is 2496mm, eccentricity 4mm；
In addition, comparing group using DN32 welded still pipe, De25 polyethylene pipe, De25PSP steel-plastics composite pipe.Each product
Performance parameter see the table below 1.
Table 1: different pipe performance contrast tables 1
Wherein, the detection of concrete flexural strength is according to GBT 50082-2009 " normal concrete long-term behaviour and durable
Method for testing performance standard " and GBT 50081-2002 " standard for test methods of mechanical properties of ordinary concrete " Lai Jinhang, most
The utility model and the addition FC fiber of other control tubes are obtained eventually, adds 28d concrete flexural strength after pipe: table institute as above
Show, the steel modeling slip casting multiple tube of the utility model shows preferable concrete flexural strength, higher than design standard 5.0MPa's
It is required that and showing better than other most of control tubes.
The detection of heating conduction is as follows:
By test section (including the utility model steel mould slip casting multiple tube, DN32 welded still pipe, De25PSP steel plastic compount
Pipe, De25 polyethylene pipe) it is respectively embedded in the soil that thermal coefficient is 1.25W/m.K, pipeline center's wheelbase ground 1m is utilized
Water bath with thermostatic control circulates 40 DEG C of temperature of hot water with the speed of 2.0m/s and 1.2m/s in the duct, in test section length
Thermal resistance temperature sensor (tube wall temperature being measured, in Fig. 3 shown in bullet) and heat is respectively set in tube top, tube bottom at the center of direction
Flow sensor surveys piece；In soil right above away from tube top at 0.95m, arrange that 3 thermal resistance temperature pass along pipeline section axial direction
Sensor (number 1,2,3 is spaced 0.3m, the soil moisture close to soil surface is measured, referring to attached drawing 3).
30 DEG C of environment temperature of test, by 3 hours stabilizations, temperature sensor numerical fluctuations were less than 0.5 DEG C.
Medium is flowed with the speed of 2m/s and 1.2m/s, the convection transfer rate flowed in computer tube.Heat exchange amount depends on
The temperature difference of tube wall and medium, in stage on-test, since tube wall and the medium temperature difference are larger, exchange heat it is more violent, developmental tube into
The medium temperature drop of outlet is obvious, and tube wall temperature is relatively stable after 3 hours, and with medium temperature temperature difference very little, heat transfer effect
It is suppressed.But heat exchange is still main means, relatively thin in view of structure, and heat transfer is not still principal element, and examination is covered in sandbox
The soil mass volumetric heat capacity tested around pipe is tabled look-up as 2J/g.cm3, sandbox peripheral air thermal coefficient is 0.02W/ (mK),
Much smaller than soil thermal conductivity 1.25W/ (mK), environment temperature is higher, be equivalent to sandbox carry out isothermal holding, can approximation recognize
Be under adiabatic condition for sandbox, when test single developmental tube 3 hours time to soil transmitting heat to soil temperature rise not
Obviously.
Testing result shows: being when the comprehensive thermal coefficient in the eccentric structure top of the utility model is at 25 DEG C of mean temperature
λ 25=5.09W/ (mK)；It is λ 25=2.37W/ when the comprehensive thermal coefficient in this eccentric structure lower part is at 25 DEG C of mean temperature
(m·K)。
That is, the heating conduction of the steel modeling slip casting multiple tube of the utility model is better than PSP steel-plastics composite pipe, polyethylene pipe
And concrete, it is only second to steel pipe, therefore heating conduction is very good, is conducive to conduct heat.And eccentric structure is also advantageous to flow
Body conducts heat snow melt upwards.
Previous fluid heating snow melt pipe material selection is single, and there are some problems.The utility model solves fluid and adds
Some FAQs of hot snow melt pipeline, such as burn into connector leakage influence pavement condition, the anti-shearing difference of plastic pipe itself
The problem of.
In addition, the utility model is eccentric pipe.In process plastic conduit under the pressure head of slurry built-in plastic tube from
It so floats, close to steel duct upper wall is even close to, causes heating conduction superior, be advantageous to heat transfer.
The utility model pipeline by length limitation, can not flexibly construct according to the construction demand in municipal road face, changeable.
The above is only the preferable embodiment of the utility model, not appoints to the technical solution of the utility model
What formal limitation.All to make any simple modification to above embodiments according to the technical essence of the utility model, form becomes
Change and modify, each falls within the protection scope of the utility model.
Claims (10)
1. a kind of steel for fluid heating snow melt moulds slip casting multiple tube, by plastic inner pipe, metal outer pipe and pass through slip casting shape
At between plastic inner pipe and metal outer pipe and filling up the concrete layer in space between the two and constituted.
2. steel as described in claim 1 moulds slip casting multiple tube, wherein the plastic inner pipe is polyethylene pipe.
3. steel as claimed in claim 2 moulds slip casting multiple tube, wherein the polyethylene pipe is De25 plastic tube.
4. steel as described in claim 1 moulds slip casting multiple tube, wherein the metal outer pipe is DN32 steel pipe.
5. steel as described in claim 1 moulds slip casting multiple tube, wherein the length of steel modeling slip casting multiple tube is 1-60 meters.
6. steel as described in claim 1 moulds slip casting multiple tube, wherein steel modeling slip casting multiple tube is eccentric pipe, the plastics
The cross section geometric center of inner tube is not overlapped with the cross section geometric center of the metal outer pipe.
7. steel as claimed in claim 6 moulds slip casting multiple tube, wherein the plastic inner pipe locally reclines with the metal outer pipe.
8. steel as described in claim 1 moulds slip casting multiple tube, wherein press mortar used in slip casting or grouting material symbol
Standardization TB/T3192-2008 or JTG/TF502011.
9. steel as claimed in claim 8 moulds slip casting multiple tube, wherein the press mortar or grouting material include H-60 mud jacking
Agent.
10. steel as described in claim 1 moulds slip casting multiple tube, wherein the thermal coefficient of steel modeling slip casting multiple tube is greater than
1.0W/(m·K)。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821334891.4U CN208845883U (en) | 2018-08-17 | 2018-08-17 | A kind of steel modeling slip casting multiple tube for fluid heating snow melt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821334891.4U CN208845883U (en) | 2018-08-17 | 2018-08-17 | A kind of steel modeling slip casting multiple tube for fluid heating snow melt |
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| CN208845883U true CN208845883U (en) | 2019-05-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930844A (en) * | 2018-08-17 | 2018-12-04 | 中国中元国际工程有限公司 | A kind of steel modeling slip casting multiple tube for fluid heating snow melt |
| CN112959705A (en) * | 2021-02-04 | 2021-06-15 | 广东韶钢松山股份有限公司 | Production process of wear-resistant composite pipe filled with adhesive mortar |
-
2018
- 2018-08-17 CN CN201821334891.4U patent/CN208845883U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930844A (en) * | 2018-08-17 | 2018-12-04 | 中国中元国际工程有限公司 | A kind of steel modeling slip casting multiple tube for fluid heating snow melt |
| CN108930844B (en) * | 2018-08-17 | 2024-05-14 | 中国中元国际工程有限公司 | Steel-plastic grouting composite pipe for heating and melting snow by fluid |
| CN112959705A (en) * | 2021-02-04 | 2021-06-15 | 广东韶钢松山股份有限公司 | Production process of wear-resistant composite pipe filled with adhesive mortar |
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