CN108386625A - A kind of reinforced type prefabricated direct-buried thermal insulation pipe road - Google Patents
A kind of reinforced type prefabricated direct-buried thermal insulation pipe road Download PDFInfo
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- CN108386625A CN108386625A CN201810159267.3A CN201810159267A CN108386625A CN 108386625 A CN108386625 A CN 108386625A CN 201810159267 A CN201810159267 A CN 201810159267A CN 108386625 A CN108386625 A CN 108386625A
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- Prior art keywords
- outer protection
- protection tubes
- reinforced type
- pipe
- heat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/02—Welded joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
A kind of reinforced type prefabricated direct-buried thermal insulation pipe road, it is characterised in that：All material holes, gas vent, detection hole in PE outer protection tubes and electric heating melting oversleeve etc. are equipped with reinforced sealed assembly；All weld seams of PE outer protection tubes are equipped with strengthening of welded seam band；The steel pipe fitting and PE outer protection tube wall thickness of heat-insulating pipe fitting are more than the wall thickness of the steel pipe and PE outer protection tubes of corresponding heat preservation straight tube, and the foam density of heat-insulating pipe fitting is more than the foam density of heat preservation straight tube；Thermal insulation joint takes multiple reinforcement seal approach, well room pipe end to add rigid waterproofing end seal, and alarming line leading point is equipped with sealing branch pipe.The present invention is according to equivalent life optimization principle, it is therefore intended that reduces pipe network frequency of maintenance and prolongs the service life, the present invention is more than that 120 DEG C or directly-buried thermal insulation pipes equipped with leak detection alarm system are especially practical to pumped (conveying) medium.
Description
One, technical field：
It is the prefabricated direct-buried thermal insulation pipe road used in a kind of urban heating and oil transportation the invention belongs to construction material class.
Two, background technology：
Currently, produced according to CJ/T114 and GB/T29047《High-density polyethylene external protective pipe hard polyurethane foams are moulded
Expect prefabricated direct-buried thermal insulation pipe and pipe fitting》, it is widely used to delivery and the oil transportation field of urban heating system.As
Directly-buried thermal insulation pipes technology is the 40 years leadings in China into European Technical and standard evolution, is let out to directly-buried thermal insulation pipes setting
Leak detection alarm system is necessary standard configuration in Europe, but in China, and leak detection alarm technique fails effectively to push away so far
Wide application, according to analysis, key reason is that there are many short slabs, especially heat insulation elbows for our buried utilidors
A large amount of material feeding during the anti-soil back pressure ability of the foam heat-insulation layer of PE outer protection tubes intensity and heat insulation elbow is inadequate and utilidor
Hole, vent hole seal be not tight etc. to be caused.A large amount of engineering practice proves, in China, buried directly-buried thermal insulation pipes are protected
Warm elbow outer protection tube is broken, and a large amount of material hole, gas vent and thermal insulation joint are poorly sealed, and foam heat-insulation layer water inlet is caused to make steel
Pipe is by improper corrosion.
The present invention designs a kind of reinforced type prefabricated direct-buried thermal insulation pipe road, by taking according to equivalent life optimization principle
The wall thickness for increasing heat-insulating pipe fitting improves its mechanical strength；All material holes, gas vent, detection hole etc. of PE outer protection tubes are taken and are added
Strong seal approach；The multiple multi-sealed measure of reinforcement is taken to thermal insulation joint；Insulating tube pipe end to entering well room adds rigidity
The measures such as waterproof end seal, the frequency of maintenance for making every effort to reduce directly-buried thermal insulation pipes prolong the service life.
Three, invention content：
For many short slabs existing for directly-buried thermal insulation pipes, for the present invention according to equivalent life optimization principle, invention is a kind of
Reinforced type prefabricated direct-buried thermal insulation pipe road, including heat preservation straight tube, reinforced type heat-insulating pipe fitting, reinforced type thermal insulation joint, rigid waterproofing end
Envelope, pipeline leakage checking system, it is characterised in that：The heat preservation straight tube, including steel pipe, steel pipe are externally provided with foam heat-insulation layer, bubble
Foam insulating layer is externally provided with PE outer protection tubes, and all material holes, the gas vent in PE outer protection tubes are equipped with reinforced sealed assembly, are protected outside PE
The weld seam of pipe is equipped with strengthening of welded seam band；The reinforced type heat-insulating pipe fitting, including steel pipe fitting, steel pipe fitting are externally provided with ultra high density foam
Insulating layer, ultra high density foam heat-insulation layer are externally provided with reinforced type PE outer protection tubes, and the wall thickness of steel pipe fitting is more than the steel pipe of heat preservation straight tube
Wall thickness, the foam density of ultra high density foam heat-insulation layer are more than the foam density of the foam heat-insulation layer of heat preservation straight tube, reinforced type PE
The wall thickness of outer protection tube is more than the wall thickness of the PE outer protection tubes of heat preservation straight tube, and all butt welds of reinforced type PE outer protection tubes are equipped with weld seam
Reinforcing band, all material holes, gas vent in reinforced type PE outer protection tubes are equipped with reinforced sealed assembly；The reinforced type heat preservation connects
Head, including electric heating melting oversleeve, foam heat-insulation layer, all material holes, gas vent on electric heating melting oversleeve are equipped with reinforcement sealing group
Part, the wall thickness of electric heating melting oversleeve is more than the wall thickness of the PE outer protection tubes of heat preservation straight tube, along electric heating melting oversleeve and PE outer protection tubes or reinforcement
The overlap joint hot melt weld seam of overlap joint hot melt weld seam and electric heating melting oversleeve itself between type PE outer protection tubes also coats shrink belt；Into
The insulating tube of valve well room is equipped with rigid waterproofing end seal；The leak detection alarm system, alarming line leading point are equipped with sealing branch
Pipe.
The reinforced type heat-insulating pipe fitting, including but do not limit elbow, threeway, reducing, fixed knot, sewage-collecting well, hood, pipe
Road telescopic compensator, in addition, being additionally provided with tippet reinforcing plate or gusset to keeping the temperature the supervisor of threeway and the saddle-shape commissure of branch pipe.
The reinforcement cover board of PE welderings beyond the Great Wall is filled in and is covered in the reinforced sealed assembly, including PE welderings, and PE welderings are filled in and reinforced
Cover board is connected as one with PE outer protection tubes or reinforced type PE outer protection tubes or electric heating melting oversleeve by heat fusion.PE weldering plugs are specially to use
In a kind of standard component for blocking utilidor material hole and gas vent, it is that area is more than material hole to reinforce cover board, and thickness is more than PE
The PE plates of outer protection tube wall thickness 50%.Reinforce the effect of cover board, first, the leakproofness to outer protection tube carries out reinforcement, second is that can effectively prevent
Only outer protection tube cracks.
The strengthening of welded seam band coats one layer of shrink belt along weld seam again to taking the weld seam of end face sweat soldering；To with
The weld seam that welding machine or other methods are formed is squeezed out, multilayer shrink belt is coated along weld seam or heats one of electric heating melting along weld seam and reinforce
Band, and coat one layer of shrink belt again outside electric heating melting reinforcing strip.
The strengthening of welded seam band, shrink belt cover the weld seam of PE outer protection tubes or reinforced type PE outer protection tubes and are protected with outside PE
Pipe or reinforced type PE outer protection tubes bonding are integral；Its electric heating melting reinforcing strip covers the weld seam of PE outer protection tubes or reinforced type PE outer protection tubes
And PE outer protection tubes or reinforced type PE outer protection tubes are fused integrally by electrical heating.
The present invention is theoretical according to equivalent life optimization, is calculated by simulating, the insulating tube in the case where not considering water hammering
The wall thickness of the elbow or the threeway that deform, steel pipe fitting and PE outer protection tubes will especially occur in operation in part, than heat preservation straight tube institute
Thickness of steel pipe and PE thicknesss of pipe wall, which increase 15%, to be advisable, and is wanted to all weld seams of the PE outer protection tubes of heat insulation elbow and heat preservation threeway
Reinforcement is carried out, includes to the weld seam of end face fusion weld reinforcement can be carried out with cladding shrink belt.(welding technique is
The best one kind of PE pipe welding qualities, but to be usually still less than base material), this is because the PE outer protection tubes used in heat-insulating pipe fitting,
Have the characteristics that the big wall thickness of bore is small, port docking mismatch is more than 15% very common when welding, (GB/T29047 standards regulation：It adopts
With the weld seam of end face fusion weld, 20% that mismatch is no more than minimum wall thickness (MINI W.) is docked in port), it is recessed by port docking mismatch, end face
The influence of the factors such as convex, welding temperature, heat fused time, the force transfer capacity of weld bond is well below straight pipe；To with extrusion
Welder or the weld seam formed with other methods, tensile strength is well below base material, therefore, for different weld seam matter
Amount, the present invention provide a variety of reinforcement modes；The foam density of reinforced type heat-insulating pipe fitting should be greater than the density of the foam of heat preservation straight tube,
Especially the foam density of heat insulation elbow will at least be increased to 120KG/m3.
Reinforced type thermal insulation joint of the present invention in addition to proposing specific quality requirement to electric heating melting oversleeve, while also being taken
Multiple reinforcement seal approach.Twice circumferential direction Knit-lines between electric heating melting oversleeve and PE outer protection tubes or reinforced type PE outer protection tubes and
The lateral Knit-lines of oversleeve itself overlap cover shrink belt and are reinforced again, to ensure the normal power transmission of outer protection tube and prevent
It seeps water at Knit-lines；To the material hole and gas vent on electric heating melting oversleeve, first plug hot melt is welded with PE and blocked, PE welderings plug and electric heating melting
The material hole fusion sealing of oversleeve, but since PE welderings plug and the fusion situation of material hole can not detect, therefore again at the top of PE weldering plugs
The fusion situation of one piece of reinforcement cover board of hot melt, the reinforcement cover board and PE outer protection tubes can be very clear；Due to thermal insulation joint quality by
Construction condition and human factor influence are very big, therefore are reinforcing covering one layer of shrink belt again outside cover board.
It is described to be equipped with rigid waterproofing end seal, rigidity into the heat preservation straight tube of valve well room or the end face of reinforced type heat-insulating pipe fitting
Waterproof end seal includes steel skirt set, foam heat-insulation layer and shrink belt, the steel plate flange and steel-pipe welding of steel skirt set, the weldering of flange top
Plate sleeve is connect, shrink belt coats PE outer protection tubes or reinforced type PE outer protection tubes with plate sleeve port.Steel skirt set is arranged can
It effectively prevent the rainwater of well room to be scurried into insulating layer along heat preservation pipe port.
The shrink belt, thickness should be not less than 2mm, and width is more than 100mm or more, peel strength is not less than 60N/cm；
Electric heating melting reinforcing strip is that thickness is more than PE outer protection tubes wall thickness 50%, width is more than 6 times of PE outer protection tubes wall thickness, the pre-coated heating wire of single side
PE strips, the width of heating wire net is of same size with electric heating melting reinforcing strip.
The leak detection alarm system, including detection device and alarming line, alarming line are embedded in prefabricated direct-buried heat preservation
In the foam heat-insulation layer of pipeline, it is equipped with alarming line in alarming line leading point and draws sealing branch pipe, the alarming line draws sealing branch
Pipe, one end be inserted into insulating tube PE outer protection tubes in and with PE outer protection tube sweat solderings, draw sealing branch pipe in be equipped with foam thermal insulation
Layer, alarming line guide to warning device out of extraction sealing branch pipe.It seals branch pipe and draws one end of alarming line equipped with thermal contraction waterproof
Cap.
The beneficial effects of the present invention are：The present invention is according to equivalent life optimization principle, by directly-buried thermal insulation pipes
In be easy to cause the positions such as the material hole, gas vent, detection hole of Groundwater infiltration foam heat-insulation layer and be sealed reinforcement, to heat preservation
Connector and heat-insulating pipe fitting take a series of benefit short slab measures, and the service life to extending utilidor has apparent practical value
And innovation, especially to the directly-buried thermal insulation pipes equipped with leak detection alarm system, service life of the present invention to guarantee pipe network
And the normal operation of leak detection alarm system plays an important roll.
Four, it illustrates：
Figure of description 1 is thermal insulation joint sectional view；Attached drawing 2 is the section kept the temperature at straight tube or heat-insulating pipe fitting material hole
Figure；Attached drawing 3 is the PE outer protection tube butt welds reinforcement schematic diagram for keeping the temperature straight tube or heat-insulating pipe fitting；Attached drawing 4 is pipe end rigid waterproofing
End seal schematic diagram；Alarming line shown in attached drawing 5 draws sealing branch pipe schematic diagram.
It is noted in figure：1, which is steel pipe, 1a, is butt welding of steel tube seam, 2 is foam heat-insulation layer, 3 is PE outer protection tubes, 4 is PE welderings plug, 5
Be reinforce cover board, 6 be electric heating melting oversleeve, 6a be electric heating melting oversleeve with PE outer protection tubes overlap Knit-lines, 7 be shrink belt, 8 be
Electric heating melting reinforcing strip, 8a be electric heating melting reinforcing strip and PE outer protection tubes hot melt overlapping the slot, 9 be steel plate flange, 10 be plate sleeve,
11 leak detection system alarming lines, 12 sealing branch pipes, 13 are heat-shrinkable water-proof caps.
Five, specific implementation mode：
Below in conjunction with attached drawing, technical scheme of the present invention is clearly and completely described, is elaborated in description very much
Detail is to facilitate a thorough understanding of the present invention, still the present invention can also use other to be different from other manner described here
Implement, those skilled in the art can do similar popularization without violating the connotation of the present invention, therefore the present invention not by
The limitation of following public specific embodiment.
It is thermal insulation joint sectional view shown in Figure of description 1,1 be steel pipe, 1a is butt welding of steel tube seam in figure；2 be foam
Insulating layer, 3 be PE outer protection tubes, 4 be PE welderings plug, 5 be reinforce cover board, 6 be electric heating melting oversleeve, 6a be electric heating melting oversleeve and shield outside PE
Pipe overlap joint Knit-lines, 7 are shrink belts；
It is thermal insulation joint diagram from Figure of description 1, it can be seen that PE welderings plug 4 blocks the material feeding in electric heating melting oversleeve 6
It is heated integrally in hole and with it, reinforces cover board 5 and cover PE welderings plug 4 and heated integrally, in electric heating melting set with electric heating melting oversleeve 6
Sleeve 6 forms hot melt overlap joint Knit-lines 6a with PE outer protection tubes 3, reinforces also covering one layer of shrink belt 7 outside cover board 5.
Figure of description 2, is the cross-section diagram kept the temperature at straight tube or heat-insulating pipe fitting material hole, in figure, 1 be steel pipe, 2 be foam
Insulating layer, 3 be PE outer protection tubes, 4 be PE weldering plug, 5 be covering PE weldering fill in and heat integral reinforcement cover board with PE outer protection tubes；
Figure of description 3 is to keep the temperature the PE outer protection tube butt welds of straight tube or heat-insulating pipe fitting to reinforce schematic diagram, 1 be steel pipe,
2 be foam heat-insulation layer, 3 to be PE outer protection tubes, 3a be the butt weld of PE outer protection tubes, 7 be shrink belt, 8 be electric heating melting reinforcing strip, 8a
It is that electric heating melting reinforcing strip heats overlapping the slot with PE outer protection tubes；
Figure of description 4 is pipe end rigid waterproofing end seal, and 9 to be with the steel plate flange of steel-pipe welding, 10 be and flange in figure
The plate sleeve of welding, 7 are shrink belts；
Alarming line shown in Figure of description 5 draws sealing branch pipe schematic diagram, 1 is steel pipe in figure, 2 is foam heat-insulation layer, 3 is
PE outer protection tubes 11 are alarming lines, 12 be sealing branch pipe, 13 be heat-shrinkable water-proof cap.
Embodiment：
By taking certain engineering as an example, former design scheme is：For 135 DEG C/65 DEG C of water return pipeline pressure 2.5MPa, running temperature；It is double
Pipe laying in one ditch, feed pipe are identical with all technical parameters of return pipe, steel pipe specification D1020*14/PE outer protection tubes D1155*15,
Foam heat-insulation layer least density is not less than 60KG/m3；The long-term heatproof of foam is not less than 140 DEG C；It is only curved to keeping the temperature in heat-insulating pipe fitting
The bending reducing of head proposes requirement, and is not carried to the technical details such as thermal insulation joint and the sealing of other heat-insulating pipe fittings and material hole
Particular technique requirement.
We agree to through negotiating and obtaining former designer with owner, design original according to equivalent life optimization principle
Prefabricated direct-buried thermal insulation pipe road take following reinforcement measure：(1) the steel pipe specification of feed pipe is constant, and PE outer protection tubes are changed to
D1250*15, insulation layer thickness thicken 48mm than former design；(2) steel pipe of return pipe and PE outer protection tube specifications are constant, but foam
Use regular-type foam instead；(3) steel pipe and the wall thickness of PE outer protection tubes used in the wall ratio heat preservation straight tube of all heat-insulating pipe fittings all thicken
2mm；(4) thickness 10mm, width are used again with Portable extrusion welder to the heat insulation elbow weld seam of PE outer protection tubes after welding
The electric heating melting reinforcing strip of the pre-coated heating wire of 100mm single sides is reinforced, and finally also covering electric heating melting reinforcing strip coats one layer of thermal contraction again
Band, shrink belt thickness 2mm, width 200mm；The foam density of heat insulation elbow presses 120Kg/m3 material feedings.(5) to heat preservation straight tube,
Heat-insulating pipe fitting, all material holes of thermal insulation joint and exhaust outlet cover one piece of thickness 10mm, wide 100mm again after welding plug sealing with PE,
Long 300mm, PE plate of the single side with heating wire reinforce material hole；(6) electric heating melting oversleeve used in thermal insulation joint is thick
15mm, width 700mm, the wide 100mm of heating wire net；The overlap joint Knit-lines of electric heating melting oversleeve and PE pipes coat again one layer of shrink belt into
Row reinforces sealing, and shrink belt thickness 2mm, width 200mm, shrink belt and the peel strength of PE outer protection tubes are more than 60N/cm.
(7) rigid waterproofing end seal is added to the heat preservation pipe end for entering valve well room.(8) thermal insulation joint gas-tight test pressure is increased to
0.04MPa (CJ/T114 regulations are 0.02MPa)
By taking above-mentioned reinforcement measure, which has run for many years, do not occur so far how problem, and heat-insulating property
Very good, the temperature drop of water supply line is less than 0.2 DEG C/Km.And according to measuring and calculating at that time, after taking above-mentioned strengthening measure, engineering is made
Valence is only higher by 5% than original design, is primarily due among these caused by the insulating layer thickening of water supply line.
Claims (7)
1. a kind of reinforced type prefabricated direct-buried thermal insulation pipe road, including heat preservation straight tube, reinforced type heat-insulating pipe fitting, reinforced type thermal insulation joint,
Rigid waterproofing end seal, pipeline leakage checking system, it is characterised in that：The heat preservation straight tube, including steel pipe, steel pipe are externally provided with foam
Insulating layer, foam heat-insulation layer are externally provided with PE outer protection tubes, and all material holes, the gas vent in PE outer protection tubes are equipped with reinforcement sealing group
The weld seam of part, PE outer protection tubes is equipped with strengthening of welded seam band；The reinforced type heat-insulating pipe fitting, including steel pipe fitting, steel pipe fitting are externally provided with super
High-density foam insulating layer, ultra high density foam heat-insulation layer are externally provided with reinforced type PE outer protection tubes, and the wall thickness of steel pipe fitting is more than heat preservation
The thickness of steel pipe of straight tube, the foam that the foam density of ultra high density foam heat-insulation layer is more than the foam heat-insulation layer of heat preservation straight tube are close
Degree, the wall thickness of reinforced type PE outer protection tubes are more than the wall thickness of the PE outer protection tubes of heat preservation straight tube, all docking of reinforced type PE outer protection tubes
Weld seam is equipped with strengthening of welded seam band, and all material holes, gas vent in reinforced type PE outer protection tubes are equipped with reinforced sealed assembly；It is described
Reinforced type thermal insulation joint, including electric heating melting oversleeve, foam heat-insulation layer, all material holes, gas vent on electric heating melting oversleeve are all provided with
There is reinforced sealed assembly, the wall thickness of electric heating melting oversleeve is more than the wall thickness of the PE outer protection tubes of heat preservation straight tube, along electric heating melting oversleeve and PE
The overlap joint hot melt weld seam of overlap joint hot melt weld seam and electric heating melting oversleeve itself between outer protection tube or reinforced type PE outer protection tubes also coats
Shrink belt；Heat preservation pipeline section into valve well room is equipped with rigid waterproofing end seal；The leak detection alarm system, alarming line draw
Go out a little to be equipped with sealing branch pipe.
2. reinforced type prefabricated direct-buried thermal insulation pipe according to claim 1 road, it is characterised in that：The reinforced sealed assembly
Plug is welded including PE and is covered in the reinforcement cover board of PE welderings beyond the Great Wall, and PE welderings are filled in and reinforced cover board and protected with outside PE outer protection tubes or reinforced type PE
Pipe or electric heating melting oversleeve are connected as one by heat fusion.
3. reinforced type prefabricated direct-buried thermal insulation pipe according to claim 1 road, it is characterised in that：The strengthening of welded seam band, it is right
The weld seam for taking end face sweat soldering coats one layer of shrink belt along weld seam again, to what is formed with extrusion welding machine or other methods
Weld seam coats multilayer shrink belt along weld seam or one of electric heating melting reinforcing strip is arranged along weld seam, outside electric heating melting reinforcing strip also
Coat one layer of shrink belt.
4. reinforced type prefabricated direct-buried thermal insulation pipe according to claim 1 road, it is characterised in that：The strengthening of welded seam band,
Shrink belt cover the weld seam of PE outer protection tubes or reinforced type PE outer protection tubes and it is Nian Jie with PE outer protection tubes or reinforced type PE outer protection tubes at
One, electric heating melting reinforcing strip cover the weld seam of PE outer protection tubes or reinforced type PE outer protection tubes and are protected outside PE outer protection tubes or reinforced type PE
Pipe is fused integral by electrical heating.
5. reinforced type prefabricated direct-buried thermal insulation pipe according to claim 1 road, it is characterised in that：It is described into valve well
The heat preservation straight tube of room or the end face of reinforced type heat-insulating pipe fitting are equipped with rigid waterproofing end seal, and rigid waterproofing end seal includes steel skirt set, bubble
Foam insulating layer and shrink belt, the steel plate flange and steel-pipe welding of steel skirt set, flange top welding steel sleeve, shrink belt will
PE outer protection tubes or reinforced type PE outer protection tubes are coated with plate sleeve port.
6. reinforced type prefabricated direct-buried thermal insulation pipe according to claim 1 road, it is characterised in that：The leak detection alarm
System, including detection device and alarming line, alarming line is embedded in the foam heat-insulation layer in prefabricated direct-buried thermal insulation pipe road, in alarming line
Leading point is equipped with alarming line and draws sealing branch pipe, and the alarming line, which is drawn, seals branch pipe, in the PE outer protection tubes of one end insulating tube simultaneously
It with PE outer protection tube sweat solderings, draws and is equipped with foam heat-insulation layer in sealing branch pipe, alarming line is drawn out to alarm out of sealing branch pipe
Equipment.
7. reinforced type prefabricated direct-buried thermal insulation pipe according to claim 1 road, it is characterised in that：The sealing branch pipe, draws
The one end for going out alarming line is equipped with heat-shrinkable water-proof cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810159267.3A CN108386625A (en) | 2018-02-10 | 2018-02-10 | A kind of reinforced type prefabricated direct-buried thermal insulation pipe road |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810159267.3A CN108386625A (en) | 2018-02-10 | 2018-02-10 | A kind of reinforced type prefabricated direct-buried thermal insulation pipe road |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108386625A true CN108386625A (en) | 2018-08-10 |
Family
ID=63069211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810159267.3A Pending CN108386625A (en) | 2018-02-10 | 2018-02-10 | A kind of reinforced type prefabricated direct-buried thermal insulation pipe road |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173303A (en) * | 2019-04-02 | 2019-08-27 | 中铁隧道集团二处有限公司 | A kind of tunnel drainage blind pipe and splash guard seal construction method |
| CN110435161A (en) * | 2019-08-06 | 2019-11-12 | 诚业工程科技集团有限公司 | A kind of prefabricated direct-buried thermal insulation pipe road system field joints coating technology |
-
2018
- 2018-02-10 CN CN201810159267.3A patent/CN108386625A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173303A (en) * | 2019-04-02 | 2019-08-27 | 中铁隧道集团二处有限公司 | A kind of tunnel drainage blind pipe and splash guard seal construction method |
| CN110435161A (en) * | 2019-08-06 | 2019-11-12 | 诚业工程科技集团有限公司 | A kind of prefabricated direct-buried thermal insulation pipe road system field joints coating technology |
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| WD01 | Invention patent application deemed withdrawn after publication |