CN108591668A - A kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney - Google Patents
A kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney Download PDFInfo
- Publication number
- CN108591668A CN108591668A CN201810803132.6A CN201810803132A CN108591668A CN 108591668 A CN108591668 A CN 108591668A CN 201810803132 A CN201810803132 A CN 201810803132A CN 108591668 A CN108591668 A CN 108591668A
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- Prior art keywords
- expanding
- pipe
- long
- steel
- hydrophobic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 230000002209 hydrophobic effect Effects 0.000 title claims abstract description 40
- 238000005452 bending Methods 0.000 claims abstract description 21
- 238000010276 construction Methods 0.000 claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000009413 insulation Methods 0.000 claims description 19
- 238000004321 preservation Methods 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 239000004964 aerogel Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 2
- 238000005119 centrifugation Methods 0.000 claims 1
- 239000011490 mineral wool Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004035 construction material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
Classifications
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
-
- 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
- F16L43/00—Bends; Siphons
-
- 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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/04—Expansion-compensation arrangements for pipe-lines making use of bends, e.g. lyre-shaped
-
- 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
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/22—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for bends
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The present invention provides a kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney.The method of the present invention, including：Expanding standpipe portion constitutes steel bushing steel construction by the standpipe of the expanding outer protection tube of " L " type and the long-arm pipe bending being arranged in its riser interiors, and long-arm pipe bending goes out the position that ground is connect with aerial section and is provided with rainhat；Expanding hydrophobic portion constitutes steel bushing steel construction, expanding standpipe portion and the isometrical connection of expanding hydrophobic portion by the direct-buried pipe of the expanding outer protection tube of " L " type and the instrumentation tubes being arranged inside its direct-buried pipe；Hydrophobic long bend pipe is made of the long-armed drain pipe of deep camber and support limit ring；Reducer pipe, for connecting the expanding hydrophobic portion and standard gauge outer protection tube.The reasonable design of the present invention reduces installation input, the problems such as improving installation effectiveness, maximize the compensating action of natural compensation Z-type bend pipe, solve long drain pipe thermal expansion curve, low-frequency vibration.
Description
Technical field
The present invention relates to direct buried steam pipeline road fields, more particularly to a kind of is to solve steam heat preserving pipeline make somebody a mere figurehead, is straight
The structure of compensation connection and low spot water drainage is buried, i.e., a kind of hydrophobic knot of steel bushing steel bend pipe of connection direct-burried and aerial jet chimney
Structure.
Background technology
When steam heat preserving pipeline by it is direct buried switch to aerial laying on the ground when, direct-burried chooses high corner and forms horizontal plane phase
To low spot, the condensed water that the instrumentation tubes internal cause temperature difference generates is gathered in corner by gravity, and this situation occur usually will be just
, otherwise easily there is water attack and is damaged to pipeline in nearly setting water drainage device, and since the structure of similar drainage joint contains collection
The three-port structures such as water pot, drain pipe, it is necessary to fixed knot be set and form anchor point counteracting stress, but after setting fixed knot, gone out on the ground
Return bend pipe and it is aerial under return bend pipe formation natural compensation Z-type it is curved lose compensating action, to consider that this depot siding need to separately have it
His indemnifying measure, pipeline setting is complex, and cost is also high；The hydrophobic pipeline drawn under normal conditions by water collect tank simultaneously is such as wanted
Lead to well room or ground, insulation construction is usually steel sleeve steel pattern, hydrophobic instrumentation tubes integrally thermally expand the displacement of generation by
To the limitation of keeping warmth space thickness, very big obstruction is formed to designing and installing.
Invention content
The skills such as the shortcoming of, directly buried compensation connection aerial according to existing steam heat preserving pipeline set forth above and low spot water drainage
Art problem, and a kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney is provided.The present invention mainly utilizes
The components such as water collect tank, sieve plate, thermal insulation support conduit saddle, expanding outer protection tube and reducer pipe are added on the outside of the working steel tube of direct-burried part,
It is drawn on the outside of from water collect tank, eaves under the hydrophobic long bend pipe to rainhat that parallel bend pipe instrumentation tubes axis is arranged, is retaining on the ground
While returning bend pipe and return bend pipe composition natural compensation Z-type structure under making somebody a mere figurehead, solves the hydrophobic link of direct-burried low spot, and be not required to
Fixed knot is set.
The technological means that the present invention uses is as follows：
A kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney, which is characterized in that including：
Expanding standpipe portion constitutes steel by the standpipe of the expanding outer protection tube of " L " type and the long-arm pipe bending being arranged in its riser interiors
Steel construction is covered, the long-arm pipe bending goes out the position that ground is connect with aerial section and is provided with rainhat；
Expanding hydrophobic portion is made of the direct-buried pipe of the expanding outer protection tube of " L " type and the instrumentation tubes being arranged inside its direct-buried pipe
Steel bushing steel construction, the expanding standpipe portion and the expanding isometrical connection of hydrophobic portion；
Hydrophobic long bend pipe is made of the long-armed drain pipe of deep camber and support limit ring, described long-armed drain pipe one end with set
The drain pipe tube head for setting the water collect tank in the instrumentation tubes is connected, and is parallel to the long-arm pipe bending axis and is arranged to rainhat
Eaves is drawn；The support limit ring is installed on the upper end of the long-arm pipe bending and internal setting heat insulating mattress；
Reducer pipe, for connecting the expanding hydrophobic portion and standard gauge outer protection tube.
The caliber of above-mentioned expanding outer protection tube is calculated by the natural compensation amount designed and dress displacement partially.
Further, the direct-buried pipe and the standpipe are isometrical seamless right at " L " type inflection point of the expanding outer protection tube
It connects, the long-arm pipe bending isometrical slitless connection at " L " type inflection point same as the instrumentation tubes.
Further, heat insulation support conduit saddle is fixed in the instrumentation tubes by fixed ring clamping heat insulation loop and is placed in the collection
The planar support plate of the side of water pot, heat insulation support conduit saddle bottom is connected in the expanding outer protection tube.The thermal insulation support
The setting of conduit saddle need not can on the ground close on installation pipe support, and whole height is determined by annular space height.
Further, sieve plate is equipped in the water collect tank.
Further, layering package blanket type insulation, the heat preservation in the heat preservation annular space of the steel bushing steel construction
Material is ultra-fine centrifugally glass-wool, nanoporous aerogel or alumina silicate blanket, is not limited to above-mentioned several.
Compared with the prior art, the present invention has the following advantages：
The present invention, which utilizes to return to do over again under expanding long-arm pipe bending connection is maked somebody a mere figurehead on the ground, makees pipe formation natural compensation Z-type structure
Meanwhile back to back expanding hydrophobic portion provides water drainage function, and it is not required to setting fixed knot；Expanding hydrophobic portion and hydrophobic long bend pipe
It is mobile simultaneously with long-arm pipe bending and instrumentation tubes；The heat insulation support conduit saddle being arranged in instrumentation tubes in expanding hydrophobic portion bears component weight
Power at the same ensure component do not slid by axial displacement within the scope of design compensation amount, also avoid between instrumentation tubes and outer protection tube generate heat
Bridge；Hydrophobic long bend pipe ensures that it is parallel with long-arm pipe bending and can be wrapped in insulating layer by support limit ring, and it is whole to improve component
Insulation capacity while annular stop structure allow hydrophobic long bend pipe can have under operation low-frequency vibration displacement space,
Avoid stress rupture；Rainhat is formed on long-arm pipe bending and goes out ground terminal in advance, reduces in-site installation, improves assembly reliability.
Its component composition of the invention is reasonable, and all components prefabrication, in-site installation only needs isometrical connection, which will be all
Multifunctional unit provides more multi-line for design and arranges possible, the compensating action of maximization natural compensation Z-type bend pipe, conducive to setting
Meter adjustment reduces installation input, solves the problems such as long drain pipe thermal expansion curve, low-frequency vibration.
The present invention can be widely popularized in direct buried steam pipeline road field based on the above reasons.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to do simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the partial enlarged view of heat insulation support conduit saddle of the present invention.
Fig. 3 is the schematic diagram of the hydrophobic long bend pipe of the present invention.
Fig. 4 is the partial enlarged view of support limit ring of the present invention.
In figure：1, long-arm pipe bending；2, expanding hydrophobic portion；21, water collect tank；22, sieve plate；3, long-armed drain pipe；4, heat-insulated branch
Stay tube support；41, fixed ring；42, heat insulation loop；43, instrumentation tubes；44, planar support plate；5, support limit ring；51, heat insulating mattress；6, prevent
Rain cap；7, expanding outer protection tube；71, reducer pipe；8, standard gauge outer protection tube.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, Figure 3, a kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney, including：
Expanding standpipe portion is made of the standpipe of the expanding outer protection tube of " L " type 7 and the long-arm pipe bending 1 being arranged in its riser interiors
Steel bushing steel construction, the long-arm pipe bending 1 go out the position that ground is connect with aerial section and are provided with rainhat 6；
Expanding hydrophobic portion 2, the direct-buried pipe by the expanding outer protection tube of " L " type 7 and the instrumentation tubes 43 that are arranged inside its direct-buried pipe
Constitute steel bushing steel construction, the expanding standpipe portion and 2 isometrical connection of the expanding hydrophobic portion；Wherein, the direct-buried pipe with it is described
Standpipe isometrical slitless connection at " L " type inflection point of the expanding outer protection tube 7, the long-arm pipe bending 1 are same with the instrumentation tubes 43
Sample isometrical slitless connection at " L " type inflection point.
Hydrophobic long bend pipe is made of the long-armed drain pipe 3 of deep camber and support limit ring 5, described 3 one end of long-armed drain pipe with
The drain pipe tube head of the water collect tank 21 being arranged in the instrumentation tubes 43 is connected, be parallel to 1 axis of the long-arm pipe bending be arranged to
6 times eaves of the rainhat are drawn；Sieve plate 22 is equipped in the water collect tank 21.The support limit ring 5 is installed on the long crook of the arm
The upper end of pipe 1, for fixing the long-armed drain pipe 3 on the long-arm pipe bending 1 and internal setting heat insulating mattress 51 is (such as Fig. 4 institutes
Show).
Heat insulation support conduit saddle 4 (as shown in Figure 2) by fixed ring 41 clamp heat insulation loop 42 be fixed in the instrumentation tubes 43 and
It is placed in the side of the water collect tank 21, the planar support plate 44 of 4 bottom of heat insulation support conduit saddle is connected to the expanding outer protection tube 7
It is interior.
Reducer pipe 71, for connecting the expanding hydrophobic portion 2 and standard gauge outer protection tube 8.
Layering package blanket type insulation in the heat preservation annular space of the steel bushing steel construction, the thermal insulation material are ultra-fine
Centrifugally glass-wool, nanoporous aerogel or alumina silicate blanket.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (5)
1. a kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney, which is characterized in that including：
Expanding standpipe portion is made of the standpipe of the expanding outer protection tube of " L " type (7) and the long-arm pipe bending (1) being arranged in its riser interiors
Steel bushing steel construction, the long-arm pipe bending (1) go out the position that ground is connect with aerial section and are provided with rainhat (6)；
Expanding hydrophobic portion (2), the direct-buried pipe by the expanding outer protection tube of " L " type (7) and the instrumentation tubes that are arranged inside its direct-buried pipe
(43) steel bushing steel construction, the expanding standpipe portion and the isometrical connection of the expanding hydrophobic portion (2) are constituted；
Hydrophobic long bend pipe is made of the long-armed drain pipe of deep camber (3) and support limit ring (5), described long-armed drain pipe (3) one end
It is connected with the drain pipe tube head for the water collect tank (21) being arranged in the instrumentation tubes (43), is parallel to the long-arm pipe bending (1) axis
Eaves is drawn under line is arranged to the rainhat (6)；The support limit ring (5) be installed on the upper end of the long-arm pipe bending (1) and
Inside setting heat insulating mattress (51)；
Reducer pipe (71), for connecting the expanding hydrophobic portion (2) and standard gauge outer protection tube (8).
2. the steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney according to claim 1, feature exist
In the direct-buried pipe and the standpipe isometrical slitless connection at " L " type inflection point of the expanding outer protection tube (7) are described long-armed
Bend pipe (1) and the instrumentation tubes (43) isometrical slitless connection equally at " L " type inflection point.
3. the steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney according to claim 1, feature exist
In heat insulation support conduit saddle (4) is fixed in the instrumentation tubes (43) by fixed ring (41) clamping heat insulation loop (42) and is placed in described
The planar support plate (44) of the side of water collect tank (21), heat insulation support conduit saddle (4) bottom is connected to the expanding outer protection tube (7)
It is interior.
4. the steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney according to claim 1, feature exist
In equipped with sieve plate (22) in the water collect tank (21).
5. the steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney according to claim 1, feature exist
In layering package blanket type insulation in the heat preservation annular space of the steel bushing steel construction, the thermal insulation material is ultra-fine centrifugation
Mineral wool, nanoporous aerogel or alumina silicate blanket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810803132.6A CN108591668A (en) | 2018-07-20 | 2018-07-20 | A kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810803132.6A CN108591668A (en) | 2018-07-20 | 2018-07-20 | A kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108591668A true CN108591668A (en) | 2018-09-28 |
Family
ID=63617827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810803132.6A Pending CN108591668A (en) | 2018-07-20 | 2018-07-20 | A kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108591668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115750915A (en) * | 2023-01-10 | 2023-03-07 | 中化二建集团有限公司 | Construction method of steel-sheathed-steel steam direct-buried heat-insulation pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1656278A1 (en) * | 1989-03-06 | 1991-06-15 | Московский Инженерно-Строительный Институт Им.В.В.Куйбышева | Pressure water line of cooling liquid delivery system |
| CN202209519U (en) * | 2011-08-31 | 2012-05-02 | 张学云 | Built-in dewatering device of straight-buried steam pipe |
| CN202469380U (en) * | 2012-03-09 | 2012-10-03 | 中投（天津）热能装备发展有限公司 | Vertically-laid compensation elbow for prefabricated directly-buried steam heat-insulation pipe tape end cap |
| CN202501160U (en) * | 2012-03-12 | 2012-10-24 | 中投（天津）热能装备发展有限公司 | Prefabricated direct-buried steam insulating pipe horizontal laying compensation bend |
| CN202852313U (en) * | 2012-10-11 | 2013-04-03 | 南京苏夏工程设计有限公司 | Directly buried steam pipeline system |
| CN204459579U (en) * | 2014-07-23 | 2015-07-08 | 江苏德威节能有限公司 | A kind of new hydrophobic elbow structure |
| JP2016070282A (en) * | 2014-09-26 | 2016-05-09 | 積水化学工業株式会社 | Bent pipe with resin heat insulator and its manufacturing process |
| CN206268691U (en) * | 2016-12-18 | 2017-06-20 | 江苏龙英管道新材料有限公司 | A kind of low energy consumption heat supply network special steam direct-burried factory pipe bend |
| CN208587648U (en) * | 2018-07-20 | 2019-03-08 | 大连科华热力管道有限公司 | A kind of steel bushing steel bend pipe hydrophobic structure connecting direct-burried and aerial jet chimney |
-
2018
- 2018-07-20 CN CN201810803132.6A patent/CN108591668A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1656278A1 (en) * | 1989-03-06 | 1991-06-15 | Московский Инженерно-Строительный Институт Им.В.В.Куйбышева | Pressure water line of cooling liquid delivery system |
| CN202209519U (en) * | 2011-08-31 | 2012-05-02 | 张学云 | Built-in dewatering device of straight-buried steam pipe |
| CN202469380U (en) * | 2012-03-09 | 2012-10-03 | 中投（天津）热能装备发展有限公司 | Vertically-laid compensation elbow for prefabricated directly-buried steam heat-insulation pipe tape end cap |
| CN202501160U (en) * | 2012-03-12 | 2012-10-24 | 中投（天津）热能装备发展有限公司 | Prefabricated direct-buried steam insulating pipe horizontal laying compensation bend |
| CN202852313U (en) * | 2012-10-11 | 2013-04-03 | 南京苏夏工程设计有限公司 | Directly buried steam pipeline system |
| CN204459579U (en) * | 2014-07-23 | 2015-07-08 | 江苏德威节能有限公司 | A kind of new hydrophobic elbow structure |
| JP2016070282A (en) * | 2014-09-26 | 2016-05-09 | 積水化学工業株式会社 | Bent pipe with resin heat insulator and its manufacturing process |
| CN206268691U (en) * | 2016-12-18 | 2017-06-20 | 江苏龙英管道新材料有限公司 | A kind of low energy consumption heat supply network special steam direct-burried factory pipe bend |
| CN208587648U (en) * | 2018-07-20 | 2019-03-08 | 大连科华热力管道有限公司 | A kind of steel bushing steel bend pipe hydrophobic structure connecting direct-burried and aerial jet chimney |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115750915A (en) * | 2023-01-10 | 2023-03-07 | 中化二建集团有限公司 | Construction method of steel-sheathed-steel steam direct-buried heat-insulation pipe |
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