CN100404939C - Steam pipeline laying method for thermoelectric plant - Google Patents
Steam pipeline laying method for thermoelectric plant Download PDFInfo
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- CN100404939C CN100404939C CNB2005100438445A CN200510043844A CN100404939C CN 100404939 C CN100404939 C CN 100404939C CN B2005100438445 A CNB2005100438445 A CN B2005100438445A CN 200510043844 A CN200510043844 A CN 200510043844A CN 100404939 C CN100404939 C CN 100404939C
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Abstract
The present invention discloses a steam pipeline laying method for thermal power plants, which belongs the pipeline laying technique. The steam pipeline laying method for thermal power plants comprises: laying thermal-insulation waterproof underground pipelines, laying outdoor pipelines, treating pipeline elbows and arranging condensed water discharging devices. Compared with the prior art, the steam pipeline laying method for thermal power plants of the present invention has the characteristics of convenient construction, easy maintenance of laid pipelines, long service life of laid pipelines, etc., and has favorable value for popularization and application.
Description
Technical field
The present invention relates to a kind of laying technology of steam line, specifically steam pipeline laying method for thermoelectric plant.
Background technique
Spread the heavy caliber steam line outside the thermoelectricity plant and draw the process of deployment of leading to the user from thermoelectricity plant, the geographical environment that pass through is very complicated.Generally the excavation pipe alley on the level land, then wherein with steam pipeline laying; In the place that pipe alley can't be excavated in ridge stone walling, residential belt etc., then be the method that adopts the high-altitude to set up.But no matter all there is its deficiency in which kind of laying method.
In the prior art, the structure of spreading the heavy caliber steam line outside the thermoelectricity plant is that the center is the internal steam pipe road, and sublevel is a thermal insulation layer, and thermal insulation layer outside is an outer steel shell, and outermost surface is the anti-rot plastic pipe, have in addition plastic tube directly is set outside thermal insulation layer.After being laid on it in pipe alley; using native stone bulk cargo fills and leads up pipe alley; if there is the stone rock ballast to contact like this with steam line; the stone rock ballast will cause pipeline outermost surface plastic protective layer to break; steel shell and thermal insulation layer will be subjected to oxide etch or breakage thereupon, and a large amount of heat energy also will be wasted.
And that the method that set up in the high-altitude exists especially is great in constructing amount, cost is high, long in time limit, not easy care, influence the people life environment, to traffic deficiency such as make troubles.And because of under the insolation that is exposed to the sun throughout the year, outermost plastic protective layer can produce be full of cracks, and the steel shell of exposing just is easy to be subjected to the corrosion of acid rain, has not only had a strong impact on heat insulation effect, and greatly reduces the working life of pipeline.
In addition, the insulation pipe elbow of heavy caliber steam line is all about the 1-5 ton, all be to adopt whole processing, whole shipment and integral installation, just after manufacturing shop machine shaping, lift on the automobile and transport to the job site by hoist, and then sling by hoist and to unload from automobile, lift again on the steam pipe line that needs the pipe laying elbow at last.Big because of insulation pipe elbow weight, shape is special, be filled with soft thermal insulation layer between steel shell and internal steam pipe road, so in its hoisting process, hang on the steel shell no matter will lift wirerope, still hang over the damage that all can cause the thermal insulation layer material on the internal steam pipe road and the dislocation between internal steam pipe road and the steel shell, to such an extent as to have influence on the thermal insulation property and the working life of pipeline.
Moreover, the device that steam line condensed water discharging is at present used, mostly be that waste pipe is connected in the joint, bottom of steam tube, waste pipe has little bending in the joint, be respectively arranged with thermal insulation layer and steel bushing outside steam tube and waste pipe, like this, when externally circumstance of temperature difference is bigger, waste pipe and steam tube joint not only can influence the proper functioning of steam tube, and repair very inconvenient owing to the reason of expanding with heat and contract with cold is easy to damage.
Summary of the invention
Technical assignment of the present invention is at above-mentioned the deficiencies in the prior art, a kind of easy construction is provided, is easy to safeguard, the steam pipeline laying method for thermoelectric plant of long service life after the pipe laying.
Technical assignment of the present invention is realized in the following manner: steam pipeline laying method for thermoelectric plant, comprise the laying of thermal-insulating waterproof under ground piping, laying, the processing of channel bend and the setting of condensate drain of open-air pipeline, wherein:
The laying of thermal-insulating waterproof under ground piping may further comprise the steps:
Behind a, the excavation pipe alley, fill sand at bottom of trench and do the basis, the compacting levelling;
B, the thick pulverized fuel ash of filling 10-30cm on pulverized fuel ash, cover with the thick pulverized fuel ash of 10-30cm steam pipeline laying again with steam line;
C, fill and lead up with sandstone earth above the pulverized fuel ash:
The laying of open-air pipeline may further comprise the steps:
A, beat installing technological hole, will insert in the installing technological hole as the reinforcing bar of supporting leg, and use cement casting in the place of steam line process;
B, on supporting leg welding U-shaped dunnage, and steam line is installed on the U-shaped dunnage;
C, at the outermost surface adhesive coating of steam line, then the uvioresistant waterproof roll is covered on steam line;
The processing of channel bend:
Channel bend is by interior conduit elbow, thermal insulation layer and make up the steel bushing elbow outward and form, and wherein, thermal insulation layer and outer combination steel bushing elbow all adopt the split structure, and its processing is laid and be may further comprise the steps:
A, thermal insulation layer and make up the preprocessing of steel bushing elbow outward: press elbow center line asymmetric prefabricated processing thermal insulation layer and outer combination steel bushing elbow downwards from upper orifice by-level, thermal insulation layer cements in two and half outer combinations in the steel bushing elbows;
B, interior conduit elbow and the two and half outer combination steel bushing elbows that have a thermal insulation layer are lifted respectively be transported to the job location;
Interior conduit elbow and other steam pipe line weld in c, elder generation, and then will wrap on the interior conduit elbow with two and half outer combination steel bushing elbows of thermal insulation layer, and the two and half outer steel bushing elbows that make up form complete outer combination steel bushing elbow to weld together;
The setting of condensate drain:
Condensate drain is installed on steam line.
B in the process of deployment of thermal-insulating waterproof under ground piping, c step adopt following steps to substitute: utilize mould that pulverized fuel ash is processed as semicircle thermal-insulating waterproof shell earlier, when constructing then with the thermal-insulating waterproof shell half be arranged on steam line below, half be arranged on steam line above, at last with pulverized fuel ash or sand bulk cargo be filled in the thermal-insulating waterproof shell around.
A step in the processing procedure of channel bend adopts following steps to substitute: thermal insulation layer and the preprocessing of outer combination steel bushing elbow be vertical from elbow upper orifice center line be two symplex structures with thermal insulation layer and the cutting of outer combination steel bushing elbow, thermal insulation layer cements in outside two and half and makes up in the steel bushing elbows.
Described condensate drain comprises the internal steam pipe road, interior steel bushing, inner thermal insulating layer, waste pipe, waste pipe thermal insulation layer and waste pipe steel sleeve, the internal steam pipe road is arranged in the interior steel bushing, be provided with inner thermal insulating layer between internal steam pipe road and the interior steel bushing, waste pipe is connected with the ponding chamber that is arranged on bottom, internal steam pipe road, waste pipe is outside equipped with the waste pipe steel sleeve, be provided with the waste pipe thermal insulation layer between waste pipe and the waste pipe steel sleeve, interior steel bushing is outside equipped with outer steel sleeve, waste pipe passes from the outer steel sleeve side after being 90 ° of arc bendings along interior steel bushing periphery, is provided with external thermal insulation between interior steel bushing and the outer steel sleeve.
In addition, be provided with the thermal insulating material service ports in the bottom of outer steel sleeve; Be provided with the aqueous vapor seperating vale in the waste pipe end that passes outer steel sleeve.
Steam pipeline laying method for thermoelectric plant of the present invention compared with prior art has following outstanding beneficial effect:
(1) coagulation of the pulverized fuel ash of employing power plant coal burning generation; it is filled in the pipe alley steam line is coated; in a single day pulverized fuel ash runs into water around steam line or moist can solidifying in the outside of steam line naturally forms the pulverized fuel ash containment vessel with insulation and waterproof action; solved pipe alley inner product water problems; also strengthen the thermal-insulating waterproof and the protective action of pipeline, also played the effect in prolongation steam line working life.In addition, because pulverized fuel ash is power plant's waste, the waterproof thermal-insulated shell that adopts pulverized fuel ash to make pipeline can also reduce the pollution of pulverized fuel ash to environment, the rational Application of accomplishing refuse.
(2) the residential quarter of steam line process build a wall or the protrusion rock of hummock on stamp vertical installing technological hole with percussion drill, utilize supporting leg reinforcing bar and U-shaped dunnage fixed steam pipeline, steam line can stably be laid on rock or the body of wall like this, can also horizontal slip on the U-shaped dunnage, not only simple in structure, easy construction, the expansion that also can not influence pipeline is flexible.
(3) coat uvioresistant waterproof roll on the steam line of laying in the open, can reduce sunlight effectively and be exposed to the sun, increased the working life of steam line the influence of steam line.
(4) thermal insulation layer at channel bend place and outer combination steel bushing elbow adopt the split structure, the thermal insulation layer material is arranged among the two and half outer combination steel bushing elbows, take any way lifting can not be damaged to the thermal insulation layer material, and avoided the dislocation between the internal steam pipe road and steel shell in whole processing, the whole shipment.
(5) in the condensate drain,, outside interior steel bushing, wrap external thermal insulation again, waste pipe and steam line joint are also wrapped in the external thermal insulation the radian increase of waste pipe and steam line joint.Like this, waste pipe and steam line joint are subjected to the influence of ambient temperature just very little, greatly reduce the waste pipe that causes because of expanding with heat and contract with cold and the damage of steam line joint.
Description of drawings
Accompanying drawing 1 is the laying cross-sectional configuration schematic representation when utilizing pipe alley to carry out steam pipeline laying in the inventive method;
Accompanying drawing 2 is laying cross-sectional configuration schematic representation of another kind of mode of execution when utilizing pipe alley to carry out steam pipeline laying in the inventive method;
Accompanying drawing 3 is the inventive method middle steam tube road laying method schematic representation when laying in the open;
Accompanying drawing 4 is the structural representations that are covered with the steam line of uvioresistant waterproof roll in the inventive method;
Accompanying drawing 5 is channel bend structural representation plan views in the inventive method;
Accompanying drawing 6 is channel bend right elevations in the accompanying drawing 5;
Accompanying drawing 7 is structural representations of the another kind of mode of execution of channel bend in the inventive method;
Accompanying drawing 8 is condensate drain structural representations in the inventive method.
Mark in the accompanying drawing is represented respectively:
1, steam line; 2, the waterproof thermal-insulated shell of pulverized fuel ash; 3, U-shaped dunnage; 4, supporting leg; 5, installing technological hole; 6, body of wall; 7, adhesive; 8, uvioresistant waterproof roll; 9, interior conduit elbow; 10, thermal insulation layer; 11, make up the steel bushing elbow outward; 12, aqueous vapor seperating vale; 13, internal steam pipe road; 14, interior steel bushing; 15, inner thermal insulating layer; 16, waste pipe; 17, waste pipe thermal insulation layer; 18, waste pipe steel sleeve; 19, outer steel sleeve; 20, external thermal insulation; 21, thermal insulating material service ports; 22, ponding chamber.
Embodiment
Explain below steam pipeline laying method for thermoelectric plant of the present invention being done with specific embodiment with reference to Figure of description.
Embodiment:
As shown in Figure 1, in the steam pipeline laying method for thermoelectric plant of the present invention, the laying of thermal-insulating waterproof under ground piping may further comprise the steps:
Behind a, the excavation pipe alley, fill sand at bottom of trench and do the basis, the compacting levelling;
B, the thick pulverized fuel ash of filling 10-30cm on pulverized fuel ash, cover with the thick pulverized fuel ash of 10-30cm steam pipeline laying again with steam line;
C, fill and lead up with sandstone earth above the pulverized fuel ash.
Pulverized fuel ash in a single day runs into water or the moist steam line 1 that can be set in immediately forms the waterproof thermal-insulated shell 2 of firm pulverized fuel ash on every side.
As shown in Figure 2, in the process of deployment of thermal-insulating waterproof under ground piping, can also utilize mould that pulverized fuel ash is processed as the waterproof thermal-insulated shell 2 of semicircle pulverized fuel ash earlier, when constructing then with waterproof thermal-insulated shell 2 half be arranged on steam line 1 below, half be arranged on steam line 1 above, at last with pulverized fuel ash or sand bulk cargo be filled in the thermal-insulating waterproof shell around.
Shown in accompanying drawing 3,4, the laying of open-air steam line may further comprise the steps:
A, beat installing technological hole 5, will insert in the installing technological hole 5 as the reinforcing bar of supporting leg 4, and use cement casting in the place of steam line process (as body of wall 6);
B, on supporting leg 4 welding U-shaped dunnage 3, and steam line 1 is installed on the U-shaped dunnage 3;
C, at the outermost surface adhesive coating 7 of steam line 1, then uvioresistant waterproof roll 8 is covered on steam line 1.
Adhesive 7 adopts the building waterproof coil special-purpose adhesive, and uvioresistant waterproof roll 8 can adopt made the roof waterproof coiled material that ultraviolet ray resistant is handled, and edge connector cements by heating and gets final product.
Shown in accompanying drawing 5,6, channel bend is by interior conduit elbow 9, thermal insulation layer 10 and make up steel bushing elbow 11 outward and form, and wherein, thermal insulation layer 10 and outer combination steel bushing elbow 11 all adopt the split structure.The processing of channel bend is laid and be may further comprise the steps:
A, thermal insulation layer 10 and the preprocessing of making up steel bushing elbow 11 outward: press asymmetric downwards prefabricated processing thermal insulation layer 10 of elbow center line and outer combination steel bushing elbow 11 from upper orifice by-level, thermal insulation layer 10 cements in two and half outer combinations in the steel bushing elbows 11;
B, with interior conduit elbow 9 and the two and half outer combination steel bushing elbows 11 that have a thermal insulation layer 10 respectively lifting be transported to the job location;
C, elder generation are with the internal steam pipe road welding of interior conduit elbow 9 with other steam pipe line, and then will wrap on the interior conduit elbow 9 with two and half outer combination steel bushing elbows 11 of thermal insulation layer 10, two and half 11 pairs at outer combination steel bushing elbows weld together and form complete outer combination steel bushing elbow 11.
As shown in Figure 7, in the processing procedure of channel bend, thermal insulation layer 10 and outer combination steel bushing elbow 11 can also preprocessing be that symmetry is divided equally into two halves, are two symmetrical structures from the vertical cutting of elbow upper orifice center line promptly.
As shown in Figure 8, condensate drain of the present invention comprises internal steam pipe road 13, interior steel bushing 14, inner thermal insulating layer 15, waste pipe 16, waste pipe thermal insulation layer 17 and waste pipe steel sleeve 18, internal steam pipe road 13 is arranged in the interior steel bushing 14, be provided with inner thermal insulating layer 15 between internal steam pipe road 13 and the interior steel bushing 14, waste pipe 16 is connected with the ponding chamber 22 that is arranged on 13 bottoms, internal steam pipe road, waste pipe 16 is outside equipped with waste pipe steel sleeve 18, be provided with waste pipe thermal insulation layer 17 between waste pipe 16 and the waste pipe steel sleeve 18, interior steel bushing 14 is outside equipped with outer steel sleeve 19, waste pipe 16 passes from outer steel sleeve 19 sides after being 90 ° of arc bendings along interior steel bushing 14 peripheries, is provided with external thermal insulation 20 between interior steel bushing 14 and the outer steel sleeve 19.Be provided with thermal insulating material service ports 21 in the bottom of outer steel sleeve 19; The end that passes the waste pipe 16 of outer steel sleeve 19 is provided with aqueous vapor seperating vale 12.
In the pipe laying process, whenever keeping at a certain distance away is provided with an above-mentioned condensate drain.
Claims (6)
1. steam pipeline laying method for thermoelectric plant is characterized in that it comprises the laying of thermal-insulating waterproof under ground piping, laying, the processing of channel bend and the setting of condensate drain of open-air pipeline, wherein:
The laying of thermal-insulating waterproof under ground piping may further comprise the steps:
Behind a, the excavation pipe alley, fill sand at bottom of trench and do the basis, the compacting levelling;
B, the thick pulverized fuel ash of filling 10-30cm on pulverized fuel ash, cover with the thick pulverized fuel ash of 10-30cm steam pipeline laying again with steam line;
C, fill and lead up with sandstone earth above the pulverized fuel ash;
The laying of open-air pipeline may further comprise the steps:
A, beat installing technological hole, will insert in the installing technological hole as the reinforcing bar of supporting leg, and use cement casting in the place of steam line process;
B, on supporting leg welding U-shaped dunnage, and steam line is installed on the U-shaped dunnage;
C, at the outermost surface adhesive coating of steam line, then the uvioresistant waterproof roll is covered on steam line;
The processing of channel bend:
Channel bend is by interior conduit elbow, thermal insulation layer and make up the steel bushing elbow outward and form, and wherein, thermal insulation layer and outer combination steel bushing elbow all adopt the split structure, and its processing is laid and be may further comprise the steps:
A, thermal insulation layer and make up the preprocessing of steel bushing elbow outward: press elbow center line asymmetric prefabricated processing thermal insulation layer and outer combination steel bushing elbow downwards from upper orifice by-level, thermal insulation layer cements in two and half outer combinations in the steel bushing elbows;
B, interior conduit elbow and the two and half outer combination steel bushing elbows that have a thermal insulation layer are lifted respectively be transported to the job location;
Interior conduit elbow and other steam pipe line weld in c, elder generation, and then will wrap on the interior conduit elbow with two and half outer combination steel bushing elbows of thermal insulation layer, and the two and half outer steel bushing elbows that make up form complete outer combination steel bushing elbow to weld together;
The setting of condensate drain:
Condensate drain is installed on steam line.
2. steam pipeline laying method for thermoelectric plant according to claim 1, it is characterized in that b, c step in the process of deployment of thermal-insulating waterproof under ground piping adopt following steps to substitute: utilize mould that pulverized fuel ash is processed as semicircle thermal-insulating waterproof shell earlier, when constructing then with the thermal-insulating waterproof shell half be arranged on steam line below, half be arranged on steam line above, at last with pulverized fuel ash or sand bulk cargo be filled in the thermal-insulating waterproof shell around.
3. steam pipeline laying method for thermoelectric plant according to claim 1, it is characterized in that a step in the processing procedure of channel bend adopts following steps to substitute: thermal insulation layer and the preprocessing of outer combination steel bushing elbow be vertical from elbow upper orifice center line be two symplex structures with thermal insulation layer and the cutting of outer combination steel bushing elbow, thermal insulation layer cements in outside two and half and makes up in the steel bushing elbows.
4. steam pipeline laying method for thermoelectric plant according to claim 1, it is characterized in that described condensate drain, comprise the internal steam pipe road, the ponding chamber, interior steel bushing, inner thermal insulating layer, waste pipe, waste pipe thermal insulation layer and waste pipe steel sleeve, the internal steam pipe road is arranged in the interior steel bushing, be provided with inner thermal insulating layer between internal steam pipe road and the interior steel bushing, waste pipe is connected with the ponding chamber that is arranged on bottom, internal steam pipe road, waste pipe is outside equipped with the waste pipe steel sleeve, be provided with the waste pipe thermal insulation layer between waste pipe and the waste pipe steel sleeve, interior steel bushing is outside equipped with outer steel sleeve, waste pipe passes from the outer steel sleeve side after being 90 ° of arc bendings along interior steel bushing periphery, is provided with external thermal insulation between interior steel bushing and the outer steel sleeve.
5. steam pipeline laying method for thermoelectric plant according to claim 4 is characterized in that being provided with the thermal insulating material service ports in the bottom of outer steel sleeve.
6. steam pipeline laying method for thermoelectric plant according to claim 4 is characterized in that the waste pipe end that passes outer steel sleeve is provided with the aqueous vapor seperating vale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100438445A CN100404939C (en) | 2005-06-20 | 2005-06-20 | Steam pipeline laying method for thermoelectric plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100438445A CN100404939C (en) | 2005-06-20 | 2005-06-20 | Steam pipeline laying method for thermoelectric plant |
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| CN1884888A CN1884888A (en) | 2006-12-27 |
| CN100404939C true CN100404939C (en) | 2008-07-23 |
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| CNB2005100438445A Active CN100404939C (en) | 2005-06-20 | 2005-06-20 | Steam pipeline laying method for thermoelectric plant |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929579B (en) * | 2009-06-19 | 2012-07-04 | 五冶集团上海有限公司 | Method for laying dry quenching instrument pipeline |
| CN102330872A (en) * | 2011-07-27 | 2012-01-25 | 中国电力工程顾问集团西北电力设计院 | Anti-freezing method for buried pipeline |
| CN108223909B (en) * | 2018-02-09 | 2019-08-30 | 中国石油天然气集团公司管材研究所 | Prevent the pipe laying method of moisture gathering line internal corrosion |
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| US5403120A (en) * | 1986-03-31 | 1995-04-04 | Nupipe, Inc. | Method of installing a substantially rigid thermoplastic pipe in existing main and lateral conduits |
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| JP2003343763A (en) * | 2002-05-29 | 2003-12-03 | C I Kasei Co Ltd | Method of installing underground pipe |
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2005
- 2005-06-20 CN CNB2005100438445A patent/CN100404939C/en active Active
Patent Citations (5)
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|---|---|---|---|---|
| US3933181A (en) * | 1972-04-20 | 1976-01-20 | Nyby Bruk Ab | Long distance heating conduit in particular for hot water lines |
| US5403120A (en) * | 1986-03-31 | 1995-04-04 | Nupipe, Inc. | Method of installing a substantially rigid thermoplastic pipe in existing main and lateral conduits |
| CN1101968A (en) * | 1994-08-04 | 1995-04-26 | 于永辉 | Method for directly burying superheat steam pipeline |
| JP2003343763A (en) * | 2002-05-29 | 2003-12-03 | C I Kasei Co Ltd | Method of installing underground pipe |
| CN2608815Y (en) * | 2003-01-20 | 2004-03-31 | 天津大学 | Directly-buried vacuum insulating steam pipeline drainage device |
Non-Patent Citations (4)
| Title |
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| 有外套钢管的蒸汽直埋管的施工工艺. 孙国勋等.安装，第5期. 2001 |
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