CN102954309B - Steam directly buried pipe - Google Patents
Steam directly buried pipe Download PDFInfo
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- CN102954309B CN102954309B CN201210477386.6A CN201210477386A CN102954309B CN 102954309 B CN102954309 B CN 102954309B CN 201210477386 A CN201210477386 A CN 201210477386A CN 102954309 B CN102954309 B CN 102954309B
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- core pipe
- pipe
- thermal insulation
- insulation layer
- steam pipe
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Abstract
The invention discloses a steam directly buried pipe. The steam directly buried pipe comprises a casing pipe, a core pipe, a heat-preserving structure, a fixed bracket and movable brackets, wherein the heat-preserving structure is wrapped on the core pipe; the fixed bracket and the movable brackets are arranged between the casing pipe and the core pipe; a corrugated pipe compensator is arranged at one end of the core pipe; the fixed bracket is arranged at the other end of the core pipe; the movable brackets are uniformly arranged between the corrugated pipe compensator and the fixed bracket; a clearance A is formed between one end of a protecting sleeve of the corrugated pipe compensator and the core pipe; a remedying device is concentrically sleeved on the protecting sleeve and the end of the core pipe where the clearance A is formed; the clearance A is communicated with the remedying device; the remedying device is provided with a steam exhausting device; the fixed bracket is trumpet-shaped; and on each movable bracket, a heat-isolating cushion is arranged between the core pipe and a hoop. The service life of equipment is prolonged, the heat energy loss is reduced, and the heat supply radius is increased.
Description
Technical field
The present invention relates to heat power equipment manufacturing technology field, be specifically related to insulated steam pipe.
Background technique
Insulated steam pipe be a kind of be embedded in underground in order to lay the steam line of remote heat supply; comprise core pipe, outer sleeve and be located at thermal insulation layer between the two; steam circulates in core pipe; thermal insulation layer is in order to reduce the temperature drop in vapor transmission process, and outer sleeve plays the effect of isolated earth, support and protective core pipe.
Prior art is in manufacturing the process of insulated steam pipe, generally to use hard polyurethane foam, rock wool to be incubated processing to pipeline,, easily there is the situation of deformation and failure in the heat resistance of hard polyurethane foam and poor fire, is not suitable for separately using as the thermal insulation layer of high-temperature pipe; And the hydrophobicity of rock wool is poor, after immersion, be difficult to return to original performance, that unit weight becomes is large, length of staple shortens, effect of heat insulation variation, and when rock wool runs into the situation of pipe leakage, heat insulation effect significantly reduces, and can not be guaranteed the working life of pipeline.
The core pipe of insulated steam pipe and outer sleeve are metal material, support must be set to avoid causing thermal insulation layer distortion, impaired because of the weight effect of core pipe, and then affect heat insulation effect, the support arranging between steam direct-buried tube core pipe and outer sleeve is divided into two kinds of fixed support and travel(l)ing rests, fixed support of the prior art is along core caliber to fixing annulus, its internal diameter equals the external diameter of core pipe, its external diameter equals the internal diameter of outer sleeve, the fixed support of this structure, core pipe and the outer sleeve temperature variation after passing into steam is different, the thermal expansion degree of core pipe is higher than outer sleeve, the power of core tube swelling outwards acts on outer sleeve by support vertical, the effect of power is mutual, core tube wall is also subject to equal and opposite in direction, the active force of opposite direction, easily cause core pipe damaged, tear, steam leaks, drench or the thermal insulation layer that destroys by rush of water, cause permanent damage, the working life of equipment is shorter, in addition, the difference that the heat transfer distances of support equals outer sleeve internal diameter and core pipe external diameter is minimum value, and in core pipe, the heat energy of steam conducts to through support maximum that outer sleeve scatters and disappears, and is the structural type of temperature drop maximum.
The displacement amount that compensator brings with absorbent cores pipe expanded by heating must be set on the core pipe between two fixed supports of insulated steam pipe; Conventional compensator is corrugated expansion joint and sleeve expansion joint at present, wherein corrugated expansion joint is subject to the restriction of cold draw, there is flexible tired problem, there is the restriction of access times, and sleeve expansion joint is taked the sealing of high pressure bulking agent, also having the restriction of access times, all can there is not arrive the number of times limiting and situation about surprisingly revealing in two kinds of compensators in actual use; Once and for the compensator of connecting core pipe, reveal, not only can bring destruction to thermal insulation layer, and the anticorrosive coat that can not use to outer sleeve under the operating mode higher than 80 ℃ brings destruction, have a strong impact on the working life of equipment, because compensator damages the pipeline causing, reveal and account for 90% of sum at present.
Travel(l)ing rest of the prior art is the interior pipe and the outer pipe that is enclosed within outer sleeve inner wall that are enclosed within core tube wall, the two connects with one heart with positioning rod, during pipeline expanded by heating, interior pipe and core pipe and outer pipe and outer sleeve generation sliding friction, drive pipeline only moving axially, by compensator equilibrium displacement amount, frictional force between the travel(l)ing rest of this structure and core pipe and outer sleeve is larger, pipeline easily weares and teares, destroy thermal insulation layer, the working life of equipment is shorter, travel(l)ing rest directly contacts with core pipe in addition, the amount that the heat energy of steam conducts to outer sleeve by support is more, the temperature drop value of unit length is larger, the distance that steam can be carried is shorter.
In sum, the insulated steam pipe of prior art manufacture exists working life short, heat-energy losses and causes greatly the problem that heat range of heat is little.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of insulated steam pipe, can solve insulated steam pipe of the prior art shorter working life, and heat-energy losses causes greatly the problem that heat range of heat is little simultaneously.
The present invention is achieved through the following technical solutions:
A kind of insulated steam pipe, comprise outer sleeve, core pipe, be wrapped in the insulating structure of core pipe, and be arranged at fixed support, the travel(l)ing rest between outer sleeve and core pipe, described core pipe one end is provided with corrugated expansion joint, described fixed support is located at the other end of core pipe, and travel(l)ing rest is evenly distributed between corrugated expansion joint and fixed support;
Between protecting cover one end of described corrugated expansion joint and core pipe, be provided with A gap, be provided with on the core pipe of this one end in A gap at protecting cover and core pipe, concentric is arranged with remedies device, described A gap with remedy device and be communicated with, described in remedy device and be provided with exhaust steam pipe;
Described fixed support flare, the opening diameter of its less one end equates with the external diameter of core pipe, the opening diameter of its larger one end equates with outer sleeve internal diameter;
The assistant support that described travel(l)ing rest is connected in clip by clip and decile forms, and described assistant support end is provided with roller, and described roller rolls and is connected in outer sleeve internal surface, between core pipe and clip, is provided with thermal insulating pad.
Further improvement of the present invention scheme is, remedying device comprises and is provided with successively from outside to inside protective housing, bellows, same one end of described protective housing, bellows is sealedly attached to protecting cover, and the other end of bellows is sealedly attached to core pipe, between the other end of protective housing and core pipe, is provided with B gap; Described exhaust steam pipe is communicated in bellows, and exhaust steam pipe outwards passes protective housing, the set hole of outer sleeve.
Further improvement of the present invention scheme is, the position that is tightly connected of bellows one end and compensator, and the A gap that is positioned at protecting cover and core pipe is peripheral.
Further improvement of the present invention scheme is that the angle angle that the outer wall of support bracket fastened sidewall and core pipe forms is 30 ~ 45 °; Described fixed support two-port edge welds with outer sleeve inner wall, core tube wall respectively.
Further improvement of the present invention scheme is, thermal insulating pad is combined by two semicircular structures, and described thermal insulating pad is made by asbestos slate.
Further improvement of the present invention scheme is, clip periphery decile is connected with three assistant supports, and described three assistant supports are arranged at respectively the neutral position between the clamping arm of clip periphery.
Further improvement of the present invention scheme is, insulating structure comprises thermal insulation layer, reflecting layer and protective layer, and described thermal insulation layer be take core pipe and is followed successively by from the inside to surface as axle center: the first thermal insulation layer, the second thermal insulation layer, the 3rd thermal insulation layer; Take core pipe and be followed successively by from the inside to surface as axle center in described reflecting layer: the first reflecting layer, the second reflecting layer, the 3rd reflecting layer, and first, second, third reflecting layer is alternately axially sheathed on the outside of the first thermal insulation layer, the second thermal insulation layer, the 3rd thermal insulation layer; Described protective layer is wrapped in the outside in the 3rd reflecting layer.
Further improvement of the present invention scheme is that the aerosil insulation quilt that the first thermal insulation layer and the second thermal insulation layer are 10mm ± 2mm by thickness is made; The glass wool that described the 3rd thermal insulation layer is 50mm ± 5mm by thickness is made.
Further improvement of the present invention scheme is that the aluminium foil glass fiber fabric that the first reflecting layer is 180g ± 20g by grammes per square metre is made; The aluminium foil glass fiber fabric that described the second reflecting layer and the 3rd reflecting layer are 110g ± 10g by grammes per square metre is made.
Further improvement of the present invention scheme is that the color steel that protective layer is 0.5mm ± 0.2mm by thickness is made.
The present invention will advantage compared with prior art be:
One, in the compensator of avoiding damaging, steam directly impacts and destroys thermal insulation layer; The steam that outlet pipe can avoid compensator to leak out accumulates in outer sleeve, thereby avoiding outer sleeve to bear high temperature causes appearance anticorrosive coat to come off, extend the working life of pipeline, when compensator damages leakage, the steam that leaks sprays by outlet pipe, directly perceived visible, to service work, bring very large facility;
Two, the sidewall tilting effectively decomposes core tube swelling power, greatly reduces the active force between core pipe and outer sleeve, has extended the working life of core pipe, has increased the operational safety of equipment, has reduced maintenance and has dropped into, and has improved the benefit of enterprise; Increase heat transfer distances simultaneously, effectively reduced the heat-energy losses of steam, greatly extended the heat range of heat of heating pipeline;
Three, travel(l)ing rest is connected with sliding friction formula between outer sleeve to changing into rolls connects, greatly reduces the frictional force between travel(l)ing rest and outer sleeve, effectively extended the working life of equipment; Between travel(l)ing rest and core pipe, set up thermal insulating pad, greatly reduce the heat energy emission of steam in core pipe, reduced the unit length temperature drop value of insulated steam pipe, improved the heat insulation effect of insulated steam pipe, greatly extended heat range of heat simultaneously;
Four, its high insulating effect of the thermal insulation layer being made by aerosil also has waterproof, frpf feature simultaneously, can not be subject to the impact of water or high temperature and be subject to permanent damage, has greatly extended the working life of insulated steam pipe.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is heat insulation layer structure schematic diagram.
Fig. 3 is moving rack structure schematic diagram.
Fig. 4 is compensator structure schematic diagram.
Embodiment
A kind of insulated steam pipe as shown in Figure 1, comprise outer sleeve 1, core pipe 2, be wrapped in the insulating structure 3 of core pipe 2, and be arranged at fixed support 4, the travel(l)ing rest 5 between outer sleeve 1 and core pipe 2, described core pipe 2 one end are provided with corrugated expansion joint 6, described fixed support 4 is located at the other end of core pipe 2, and travel(l)ing rest 5 is evenly distributed between corrugated expansion joint 6 and fixed support 4;
Between protecting cover 61 one end of described corrugated expansion joint 6 and core pipe 2, be provided with A gap 62, at protecting cover 61 and core pipe 2, be provided with on the core pipe 2 of this one end in A gap 62, concentric is arranged with remedies device, described A gap 62 with remedy device and be communicated with, described in remedy device and be provided with exhaust steam pipe 66;
Described fixed support 4 flares, the opening diameter of its less one end equates with the external diameter of core pipe 2, the opening diameter of its larger one end equates with outer sleeve 1 internal diameter;
The assistant support 52 that described travel(l)ing rest 5 is connected in clip 51 by clip 51 and decile forms, and described assistant support 52 ends are provided with roller 53, and described roller 53 rolls and is connected in outer sleeve 1 internal surface, between core pipe 2 and clip 51, is provided with thermal insulating pad 54.
As shown in Figure 4, remedying device comprises and is provided with successively from outside to inside protective housing 63, bellows 64, same one end of described protective housing 63, bellows 64 is sealedly attached to protecting cover 61, and the other end of bellows 64 is sealedly attached to core pipe 2, between the other end of protective housing 63 and core pipe 2, is provided with B gap 65; Described exhaust steam pipe 66 is communicated in bellows 64, and exhaust steam pipe 66 outwards passes protective housing 63, the set hole of outer sleeve 1.
As shown in Figure 4, the position that is tightly connected of bellows 64 one end and compensator 6, is positioned at 62 peripheries, A gap of protecting cover 61 and core pipe 2.
As shown in Figure 1, the angle angle that the outer wall of the sidewall of fixed support 4 and core pipe 2 forms is 30 ~ 45 °; Described fixed support 4 two-port edges weld with outer sleeve 1 inwall, core pipe 2 outer walls respectively.
As shown in Figure 3, thermal insulating pad 54 is combined by two semicircular structures, and described thermal insulating pad 54 is made by asbestos slate.
As shown in Figure 3, clip 51 periphery deciles are connected with three assistant supports 52, and described three assistant supports 52 are arranged at respectively the neutral position between the clamping arm of clip 51 peripheries.
As shown in Figure 2, insulating structure 3 comprises thermal insulation layer, reflecting layer and protective layer 37, and described thermal insulation layer be take core pipe 2 and is followed successively by from the inside to surface as axle center: the first thermal insulation layer 31, the second thermal insulation layer 32, the 3rd thermal insulation layer 33; Take core pipe 2 and be followed successively by from the inside to surface as axle center in described reflecting layer: the first reflecting layer 34, the second reflecting layer 35,36, first, second, third reflecting layer 34,35,36, the 3rd reflecting layer are alternately axially sheathed on the outside of the first thermal insulation layer 31, the second thermal insulation layer 32, the 3rd thermal insulation layer 33; Described protective layer 37 is wrapped in the outside in the 3rd reflecting layer 36.
As shown in Figure 2, the aerosil insulation quilt that the first thermal insulation layer 31 and the second thermal insulation layer 32 are 10mm ± 2mm by thickness is made; The glass wool that described the 3rd thermal insulation layer 33 is 50mm ± 5mm by thickness is made.
As shown in Figure 2, the aluminium foil glass fiber fabric that the first reflecting layer 34 is 180g ± 20g by grammes per square metre is made; The aluminium foil glass fiber fabric that described the second reflecting layer 35 and the 3rd reflecting layer 36 are 110g ± 10g by grammes per square metre is made.
As shown in Figure 2, the color steel that protective layer 37 is 0.5mm ± 0.2mm by thickness is made.
Claims (10)
1. an insulated steam pipe, comprise outer sleeve (1), core pipe (2), be wrapped in the insulating structure (3) of core pipe (2), and be arranged at fixed support (4), the travel(l)ing rest (5) between outer sleeve (1) and core pipe (2), described core pipe (2) one end is provided with corrugated expansion joint (6), described fixed support (4) is located at the other end of core pipe (2), and travel(l)ing rest (5) is evenly distributed between corrugated expansion joint (6) and fixed support (4), it is characterized in that:
Between protecting cover (61) one end of described corrugated expansion joint (6) and core pipe (2), be provided with A gap (62), at protecting cover (61) and core pipe (2), be provided with on the core pipe (2) of this one end in A gap (62), concentric is arranged with remedies device, described A gap (62) with remedy device and be communicated with, described in remedy device and be provided with exhaust steam pipe (66);
Described fixed support (4) flare, the opening diameter of its less one end equates with the external diameter of core pipe (2), the opening diameter of its larger one end equates with outer sleeve (1) internal diameter;
The assistant support (52) that described travel(l)ing rest (5) is connected in clip (51) by clip (51) and decile forms, described assistant support (52) end is provided with roller (53), described roller (53) rolls and is connected in outer sleeve (1) internal surface, between core pipe (2) and clip (51), is provided with thermal insulating pad (54).
2. a kind of insulated steam pipe as claimed in claim 1, it is characterized in that: described in remedy device and comprise and be provided with successively from outside to inside protective housing (63), bellows (64), same one end of described protective housing (63), bellows (64) is sealedly attached to protecting cover (61), the other end of bellows (64) is sealedly attached to core pipe (2), between the other end of protective housing (63) and core pipe (2), is provided with B gap (65); Described exhaust steam pipe (66) is communicated in bellows (64), and exhaust steam pipe (66) outwards passes protective housing (63), the set hole of outer sleeve (1).
3. a kind of insulated steam pipe as claimed in claim 2, is characterized in that: the position that is tightly connected of described bellows (64) one end and compensator (6), is positioned at the periphery, A gap (62) of protecting cover (61) and core pipe (2).
4. a kind of insulated steam pipe as claimed in claim 1, is characterized in that: the angle angle that the outer wall of the sidewall of described fixed support (4) and core pipe (2) forms is 30 ~ 45 °; Described fixed support (4) two-port edge welds with outer sleeve (1) inwall, core pipe (2) outer wall respectively.
5. a kind of insulated steam pipe as claimed in claim 1, is characterized in that: described thermal insulating pad (54) is combined by two semicircular structures, and described thermal insulating pad (54) is made by asbestos slate.
6. a kind of insulated steam pipe as claimed in claim 1, is characterized in that: described clip (51) periphery decile is connected with three assistant supports (52), and described three assistant supports (52) are arranged at respectively the neutral position between the clamping arm of clip (51) periphery.
7. a kind of insulated steam pipe as claimed in claim 1, it is characterized in that: described insulating structure (3) comprises thermal insulation layer, reflecting layer and protective layer (37), described thermal insulation layer be take core pipe (2) and is followed successively by from the inside to surface as axle center: the first thermal insulation layer (31), the second thermal insulation layer (32), the 3rd thermal insulation layer (33); Take core pipe (2) and be followed successively by from the inside to surface as axle center in described reflecting layer: the first reflecting layer (34), the second reflecting layer (35), the 3rd reflecting layer (36), and first, second, third reflecting layer (34,35,36) are alternately axially sheathed on the outside of the first thermal insulation layer (31), the second thermal insulation layer (32), the 3rd thermal insulation layer (33); Described protective layer (37) is wrapped in the outside in the 3rd reflecting layer (36).
8. a kind of insulated steam pipe as claimed in claim 7, is characterized in that: the aerosil insulation quilt that described the first thermal insulation layer (31) and the second thermal insulation layer (32) are 10mm ± 2mm by thickness is made; The glass wool that described the 3rd thermal insulation layer (33) is 50mm ± 5mm by thickness is made.
9. a kind of insulated steam pipe as claimed in claim 7, is characterized in that: the aluminium foil glass fiber fabric that described the first reflecting layer (34) is 180g ± 20g by grammes per square metre is made; The aluminium foil glass fiber fabric that described the second reflecting layer (35) and the 3rd reflecting layer (36) are 110g ± 10g by grammes per square metre is made.
10. a kind of insulated steam pipe as claimed in claim 7, is characterized in that: the color steel that described protective layer (37) is 0.5mm ± 0.2mm by thickness is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210477386.6A CN102954309B (en) | 2012-11-22 | 2012-11-22 | Steam directly buried pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210477386.6A CN102954309B (en) | 2012-11-22 | 2012-11-22 | Steam directly buried pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102954309A CN102954309A (en) | 2013-03-06 |
| CN102954309B true CN102954309B (en) | 2014-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210477386.6A Active CN102954309B (en) | 2012-11-22 | 2012-11-22 | Steam directly buried pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102954309B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672280B (en) * | 2013-11-26 | 2016-02-10 | 北京宇航系统工程研究所 | Long apart from wide warm area conduit compensation device |
| CN104154373B (en) * | 2014-09-12 | 2016-05-18 | 上海科华热力管道有限公司 | A kind of stabilizer of eliminating corrugated expansion joint concussion |
| CN105823108B (en) * | 2016-06-17 | 2018-11-30 | 南京苏夏工程设计有限公司 | A kind of overlength distance conveying jet chimney |
| CN110239152B (en) * | 2019-06-18 | 2021-04-20 | 哈尔滨工业大学 | Multilayer composite light heat insulation structure for high-temperature steam pipeline |
| CN111928062A (en) * | 2020-08-18 | 2020-11-13 | 江苏华昌化工股份有限公司 | Recycling method for byproduct steam of coal gasification conversion device |
| CN115076522A (en) * | 2022-05-05 | 2022-09-20 | 中国市政工程中南设计研究总院有限公司 | Insulating partition of prefabricated direct-buried steam heat-preservation pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB475326A (en) * | 1936-04-28 | 1937-11-17 | British Thomson Houston Co Ltd | Improvements in and relating to shaft packings |
| CN2714936Y (en) * | 2004-06-23 | 2005-08-03 | 杨明学 | Three-dimensional glass reinforced plastic and steel outer protective tube type precast vacuum direct-buried insulated pipe |
| WO2011158043A2 (en) * | 2010-06-18 | 2011-12-22 | Spirax-Sarco Limited | An insulated fluid duct |
| CN102330866A (en) * | 2011-07-28 | 2012-01-25 | 大连益多管道有限公司 | Independent sealing corrugated compensator |
| CN102777730A (en) * | 2012-07-25 | 2012-11-14 | 大连科华热力管道有限公司 | Directly-buried steam pipeline for long-distance transportation |
| CN202955402U (en) * | 2012-11-22 | 2013-05-29 | 淮安四方保温管有限公司 | Steam direct buried pipe |
-
2012
- 2012-11-22 CN CN201210477386.6A patent/CN102954309B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB475326A (en) * | 1936-04-28 | 1937-11-17 | British Thomson Houston Co Ltd | Improvements in and relating to shaft packings |
| CN2714936Y (en) * | 2004-06-23 | 2005-08-03 | 杨明学 | Three-dimensional glass reinforced plastic and steel outer protective tube type precast vacuum direct-buried insulated pipe |
| WO2011158043A2 (en) * | 2010-06-18 | 2011-12-22 | Spirax-Sarco Limited | An insulated fluid duct |
| CN102330866A (en) * | 2011-07-28 | 2012-01-25 | 大连益多管道有限公司 | Independent sealing corrugated compensator |
| CN102777730A (en) * | 2012-07-25 | 2012-11-14 | 大连科华热力管道有限公司 | Directly-buried steam pipeline for long-distance transportation |
| CN202955402U (en) * | 2012-11-22 | 2013-05-29 | 淮安四方保温管有限公司 | Steam direct buried pipe |
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| CN102954309A (en) | 2013-03-06 |
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