CN105257917A - Variable-diameter type corrosion-preventing high-temperature-resisting buried composite thermal insulation pipeline and mounting method - Google Patents
Variable-diameter type corrosion-preventing high-temperature-resisting buried composite thermal insulation pipeline and mounting method Download PDFInfo
- Publication number
- CN105257917A CN105257917A CN201510620102.8A CN201510620102A CN105257917A CN 105257917 A CN105257917 A CN 105257917A CN 201510620102 A CN201510620102 A CN 201510620102A CN 105257917 A CN105257917 A CN 105257917A
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- Prior art keywords
- temperature
- pipe
- thermal insulation
- buried
- pipeline
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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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
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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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
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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
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/15—Arrangements for the insulation of pipes or pipe systems for underground pipes
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention relates to a variable-diameter type corrosion-preventing high-temperature-resisting buried composite thermal insulation pipeline and a mounting method. At present, a steel thermal insulation pipe elbow manufacturing process is adopted for domestic three-stage pipe network cooling and heating, constant sectioning and welding are needed when pipes are mounted in unit corridors of housing estates, construction cost is greatly increased, and a great number of economic losses are caused in the aspect of the construction cost. The variable-diameter type corrosion-preventing high-temperature-resisting buried composite thermal insulation pipeline comprises a working steel pipe (1), and the external diameter surface of the working steel pipe is connected with high-temperature-resisting fiber felt (2). The external diameter surface of the high-temperature-resisting fiber felt is connected with a composite calcium silicate thermal insulation tile (3). The external diameter surface of the composite calcium silicate thermal insulation tile is connected with a polyurethane foaming thermal insulation layer (4). The polyurethane foaming thermal insulation layer is connected with a jacket steel pipe (5). The external diameter surface of the jacket steel pipe is coated with a reinforcement corrosion-preventing coating (6). The mounting method is applied to the pipeline for conveying steam.
Description
technical field:
the present invention relates to the buried composite thermal pipeline of a kind of diameter reducing type corrosion-resistant high-temperature and installation method.
background technique:
at present, it is domestic that what generally adopt for triode net cold and heat supply is all steel insulating pipe bend preparation process, continuous intercept is needed to weld and add a large amount of construction costs when installing in cell unit corridor, a large amount of economic losses is created from construction cost, thermal losses has occurred a large amount of unnecessary losses, pipeline conveying aspect also exists the problems such as operation troubles of getting rusty, original technology and technique in a word, in environmental protection, energy-conservation, economical, safety, the aspects such as stability will not reach the performance standard of prefabricated direct-buried thermal insulation pipe crosslinked polyethylene working pipe process engineering far away.
summary of the invention:
the object of this invention is to provide the buried composite thermal pipeline of a kind of diameter reducing type corrosion-resistant high-temperature and installation method.
above-mentioned object is realized by following technological scheme:
the buried composite thermal pipeline of a kind of diameter reducing type corrosion-resistant high-temperature, its composition comprises: working steel tube, the external diameter surface of described working steel tube is connected with high-temperature resistant fiber felt, the external diameter surface of described high temperature fiber felt is connected with composite calcium silicate insulation tile, the external diameter surface of described composite calcium silicate insulation tile is connected with polyurethane foamed thermal-insulating layer, described polyurethane foamed thermal-insulating layer is connected with outer steel pipe, the external diameter surface of described outer steel pipe scribbles one deck and strengthens corrosion-inhibiting coating.
2. the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to claim 1, is characterized in that: described high-temperature resistant fiber felt is protection bed course, and described composite calcium silicate insulation tile is organic heat-insulating layer.
the described buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature, during described working steel tube DN≤150mm, selects seamless steel pipe, when DN is greater than 150mm, generally selects spiral weld steel pipe.
the described buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature, described corrosion-inhibiting coating is polyethylene anticorrosive coating or the glass yarn winding epoxy resin layer of two layers or three layers or adds intensity level epoxy coal tar pitch coating.
the described buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature, the inside diameter surface of described outer steel pipe welds with triangle fixing support rack side, and the opposite side of described triangle fixing support rack welds with the external diameter surface of described working steel tube.
the described buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature, the outer layer surface of described reinforcement corrosion-inhibiting coating has bearing, and permanent moisture discharging opening established by the pipeline of described polyurethane foamed thermal-insulating layer.
the installation method of the described buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature, the method comprises the steps:
the work having replaced original steel prefabricated direct-buried thermal insulation pipe is got by existing working pipe, after installing support with the thermal insulation pipe of anticorrosive coat, the high density heat-insulating pipe of different amount is made to form the outer pillar of prefabricated direct-buried thermal insulation pipe work pipe fitting reducing by highi degree of accuracy PE welding gun, then pipe ends installed foaming guard seal and leave exhaust sieve, eventually pass foaming machine spray foam to foam, carry out end face finishing process after slaking, after more than completing, namely form final finished.
beneficial effect of the present invention:
1. the present invention adds steel pipe corrosion-proof, polyurethane foam insulation layer and interior working steel tube by external protective steel tube to combine.Steel sleeve steel steam compound thermal insulating pipe is applicable to carry 2.5MPa, the steam of less than 350 degrees Celsius or other medium, and this product steel pipe does external protection coating, has intensity high, and not fragile, Construction and Maintenance are easy, the advantage of long service life.
2. the present invention can reduce on-site construction time, accomplishes convenient and quick construction, and can guarantee the quality of anticorrosion, waterproof, the aspect such as insulation and mechanical strength of all pipe fittings.The outer pillar of all pipe fittings all adopts anticorrosion, the heat preserving mode identical with straight length, after needing to fill certain thickness soft material around pillar outside during site operation, then back-up sand compacting, concentrate to eliminate elbow stress.For elbow bend, in running, flexible in the pillar confined space outside for compensating axis that elbow occurs and Side movement and working steel tube, according to the heat displacement amount calculated, local increases the caliber of outer pillar, and for the elbow being less than 90 DEG C, outer pillar does not need overstriking.
3. hot insulated line of the present invention establishes permanent moisture discharging opening, make the smooth and easy discharge of steam produced in thermal insulation layer, do not cause thermal insulation layer and the breakage of outer pillar.In (outward) fixed bearing arranges humidity discharging pipe, one end of humidity discharging pipe is deeply in fixed bearing thermal insulation layer, and the other end by humidity discharging pipe extraction ground, and does rainproof, waterproof and preservative treatment at end.
4. long-term safety operational reliability of the present invention maximum (having good intensity, rigidity, heat resistance, advanced technology); Water-tight best performance, pipeline corrosion protection is to ensure the life-span long (Corrosion Protection of Fiber Reinforced Plastics or epoxy coal asphalt paint anticorrosion); Potential risk little (fatigue strength of outer steel pipe is large, the environment that long-time running is being expanded with heat and contract with cold, and interface is easy to throw off unlike external glass fibre reinforced plastics pipe); Obvious energy conservation (heat insulation effect is better for good seal performance, ne-leakage); Easy construction, node seals;
5. the present invention has good leakage performance, rigidity and hydraulic performance, has very high mechanical strength and excellent decay resistance. and it can protect tubing in transportation, installation and use process not by the destruction that extraneous factor causes.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present invention.
accompanying drawing 2 is that sectional view is looked on a left side for accompanying drawing 1.
embodiment:
embodiment 1:
the buried composite thermal pipeline of a kind of diameter reducing type corrosion-resistant high-temperature, its composition comprises: working steel tube 1, the external diameter surface of described working steel tube is connected with high-temperature resistant fiber felt 2, the external diameter surface of described high temperature fiber felt is connected with composite calcium silicate insulation tile 3, the external diameter surface of described composite calcium silicate insulation tile is connected with polyurethane foamed thermal-insulating layer 4, described polyurethane foamed thermal-insulating layer is connected with outer steel pipe 5, the external diameter surface of described outer steel pipe scribbles one deck and strengthens corrosion-inhibiting coating 6.
embodiment 2:
the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to embodiment 1, described high-temperature resistant fiber felt is protection bed course, and described composite calcium silicate insulation tile is organic heat-insulating layer.
embodiment 3:
the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to embodiment 1 or 2, when described working steel tube DN is less than or equal to 150mm, selects seamless steel pipe, when DN is greater than 150mm, generally selects spiral weld steel pipe.
embodiment 4:
the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to embodiment 1 or 2 or 3 or 4, described corrosion-inhibiting coating is polyethylene anticorrosive coating or the glass yarn winding epoxy resin layer of two layers or three layers or adds intensity level epoxy coal tar pitch coating.
embodiment 5:
the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to embodiment 1 or 2 or 3 or 4, the inside diameter surface of described outer steel pipe welds with triangle fixing support rack 7 side, and the opposite side of described triangle fixing support rack welds with the external diameter surface of described working steel tube.
embodiment 6:
the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to embodiment 1 or 2 or 3 or 4 or 5, the outer layer surface of described reinforcement corrosion-inhibiting coating has bearing 8, permanent moisture discharging opening is established by the pipeline of described polyurethane foamed thermal-insulating layer.
embodiment 6:
the installation method of the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature that one of a kind of embodiment 1-6 is described, the method comprises the steps:
the work having replaced original steel prefabricated direct-buried thermal insulation pipe is got by existing working pipe, after installing support with the thermal insulation pipe of anticorrosive coat, the high density heat-insulating pipe of different amount is made to form the outer pillar of prefabricated direct-buried thermal insulation pipe work pipe fitting reducing by highi degree of accuracy PE welding gun, then pipe ends installed foaming guard seal and leave exhaust sieve, eventually pass foaming machine spray foam to foam, carry out end face finishing process after slaking, after more than completing, namely form final finished.
Claims (7)
1. the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature, its composition comprises: working steel tube, it is characterized in that: the external diameter surface of described working steel tube is connected with high-temperature resistant fiber felt, the external diameter surface of described high temperature fiber felt is connected with composite calcium silicate insulation tile, the external diameter surface of described composite calcium silicate insulation tile is connected with polyurethane foamed thermal-insulating layer, described polyurethane foamed thermal-insulating layer is connected with outer steel pipe, the external diameter surface of described outer steel pipe scribbles one deck and strengthens corrosion-inhibiting coating.
2. the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to claim 1, is characterized in that: described high-temperature resistant fiber felt is protection bed course, and described composite calcium silicate insulation tile is organic heat-insulating layer.
3. the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to claim 1 and 2, is characterized in that: during described working steel tube DN≤150mm, select seamless steel pipe, when DN is greater than 150mm, generally select spiral weld steel pipe.
4. the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to claim 1 or 2 or 3, is characterized in that: described corrosion-inhibiting coating is polyethylene anticorrosive coating or the glass yarn winding epoxy resin layer of two layers or three layers or adds intensity level epoxy coal tar pitch coating.
5. the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to claim 1 or 2 or 3 or 4, it is characterized in that: the inside diameter surface of described outer steel pipe welds with triangle fixing support rack side, and the opposite side of described triangle fixing support rack welds with the external diameter surface of described working steel tube.
6. the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature according to claim 1 or 2 or 3 or 4 or 5, is characterized in that: the outer layer surface of described reinforcement corrosion-inhibiting coating has bearing, permanent moisture discharging opening is established by the pipeline of described polyurethane foamed thermal-insulating layer.
7. an installation method for the buried composite thermal pipeline of diameter reducing type corrosion-resistant high-temperature that one of claim 1-6 is described, is characterized in that: the method comprises the steps:
The work having replaced original steel prefabricated direct-buried thermal insulation pipe is got by existing working pipe, after installing support with the thermal insulation pipe of anticorrosive coat, the high density heat-insulating pipe of different amount is made to form the outer pillar of prefabricated direct-buried thermal insulation pipe work pipe fitting reducing by highi degree of accuracy PE welding gun, then pipe ends installed foaming guard seal and leave exhaust sieve, eventually pass foaming machine spray foam to foam, carry out end face finishing process after slaking, after more than completing, namely form final finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510620102.8A CN105257917A (en) | 2015-09-25 | 2015-09-25 | Variable-diameter type corrosion-preventing high-temperature-resisting buried composite thermal insulation pipeline and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510620102.8A CN105257917A (en) | 2015-09-25 | 2015-09-25 | Variable-diameter type corrosion-preventing high-temperature-resisting buried composite thermal insulation pipeline and mounting method |
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| Publication Number | Publication Date |
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| CN105257917A true CN105257917A (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510620102.8A Pending CN105257917A (en) | 2015-09-25 | 2015-09-25 | Variable-diameter type corrosion-preventing high-temperature-resisting buried composite thermal insulation pipeline and mounting method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218478A (en) * | 2017-07-19 | 2017-09-29 | 河南三杰热电科技股份有限公司 | A kind of prefabricated composite thermal-insulating pipe of steam direct-buried and its construction method |
| CN107939302A (en) * | 2017-11-15 | 2018-04-20 | 江苏和信石油机械有限公司 | A kind of sulfur resistive type ocean drilling rod |
| CN110886933A (en) * | 2019-12-13 | 2020-03-17 | 上海科华热力管道有限公司 | On-line anticorrosion structure of directly-buried steam heat-preservation pipeline outer sleeve steel pipe and construction method thereof |
-
2015
- 2015-09-25 CN CN201510620102.8A patent/CN105257917A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218478A (en) * | 2017-07-19 | 2017-09-29 | 河南三杰热电科技股份有限公司 | A kind of prefabricated composite thermal-insulating pipe of steam direct-buried and its construction method |
| CN107939302A (en) * | 2017-11-15 | 2018-04-20 | 江苏和信石油机械有限公司 | A kind of sulfur resistive type ocean drilling rod |
| CN110886933A (en) * | 2019-12-13 | 2020-03-17 | 上海科华热力管道有限公司 | On-line anticorrosion structure of directly-buried steam heat-preservation pipeline outer sleeve steel pipe and construction method thereof |
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Application publication date: 20160120 |
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| WD01 | Invention patent application deemed withdrawn after publication |