CN115750915A - Construction method of steel-sheathed-steel steam direct-buried heat-insulation pipe - Google Patents
Construction method of steel-sheathed-steel steam direct-buried heat-insulation pipe Download PDFInfo
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Abstract
The invention discloses a construction method of a steel-sheathed-steel steam directly-buried heat-insulating pipe, belonging to the technical field of buried pipeline construction. The invention installs the waterproof steel box at the position where the buried pipeline enters the ground, the top of the waterproof steel box is provided with a pipe outlet, the opening size of the pipe outlet meets the thermal displacement distance of the working pipe, and the outer wall of the waterproof steel box is hermetically welded and connected with the outer protecting pipe; the working pipe enters the waterproof steel box from the pipe outlet. An extrusion type drain pipe is arranged in the working pipe in the heat preservation compensation bent pipe, the extrusion type drain pipe extends into the lowest point of the working pipe, the front end of the extrusion type drain pipe is of an inclined plane structure, and the extrusion type drain pipe is connected with a drain pipe on the ground; the pressing-out type drainage device leads the drainage valve assembly to the ground. The working pipe moves in the waterproof steel box, so that the heat displacement of the pipeline is ensured to have enough compensation space. The heat-preservation compensation elbow is provided with the drainage device, so that the operation is convenient and safe.
Description
Technical Field
The invention belongs to the technical field of construction of buried pipelines, and particularly relates to a construction method of a steel-sleeve steel steam direct-buried heat-insulating pipe.
Background
In urban heating and industrial production, steam is transported by pipelines, and the steam pipelines are often considered to be buried when passing through special positions such as highways, railways, rivers and the like. The steam pipeline has the characteristics of high working temperature, large thermal displacement, frequent drainage and the like, and is a problem to be fully considered in design and construction.
When a steam pipeline is buried, a construction method of directly burying a prefabricated heat preservation pipe by steel sleeve steel steam is generally adopted, a space for thermal displacement activity is provided for a working steel pipe through an outer protection steel pipe, and a heat preservation compensation bent pipe, a drainage device, a drainage well, a valve operation well, a fixed support, a moisture discharge pipe and the like are arranged when the directly buried steam pipeline is transferred to the ground from the underground. Because the heat displacement when the drain pipe in the drainage device passes through the wall of the drain well has great influence on the sealing, the valve operation well and the drain well can not be effectively isolated, and the hot water stored in the valve operation well seriously influences the operation and personnel safety of the drain valve; when the length of the direct-buried prefabricated heat-insulation pipe is long and the thermal displacement is large, the heat-insulation compensation bent pipe is difficult to ensure the displacement space of the working steel pipe.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method of a steel-sheathed steel steam direct-buried heat-insulating pipe, and at least achieving the purpose that a working pipe has enough compensation space.
In order to solve the technical problems, the invention adopts the technical scheme that:
a steel sleeve steel steam direct-buried heat preservation pipe construction method comprises an outer protecting pipe, a heat preservation layer and a working pipe, wherein the working pipe is concentrically sleeved in the outer protecting pipe, the heat preservation layer is arranged between the outer protecting pipe and the working pipe, and an air layer is formed between the heat preservation layer and the outer protecting pipe; the steel-sheathed steel steam direct-buried heat-insulating pipe is used as a buried pipeline and buried in a pipe ditch below the ground; the position of the buried pipeline entering the ground is provided with the waterproof steel box, the top of the waterproof steel box is provided with a pipe outlet, the outer wall of the waterproof steel box is connected with the outer protecting pipe in a sealing and welding mode, and the working pipe enters the interior of the waterproof steel box from the pipe outlet of the waterproof steel box.
Further, waterproof steel case sets up in the concrete well.
Furthermore, the waterproof steel box is communicated with an air layer of the buried pipeline, and plays a role in removing damp.
Further, the outlet pipe mouth at waterproof steel case top is provided with rain-proof cap, and rain-proof cap edge is provided with stagnant water along.
Furthermore, a ground movable support movably connected with the working pipe is arranged on the ground close to the outlet of the waterproof steel box.
Furthermore, an in-well movable support movably connected with the working pipe is arranged in the waterproof steel box.
Furthermore, the buried pipeline at the ground outlet is a heat-insulation compensation bent pipe, an extrusion type drain pipe is arranged in a working pipe in the heat-insulation compensation bent pipe, the extrusion type drain pipe extends into the lowest point of the working pipe, the front end of the extrusion type drain pipe is of an inclined plane structure, and the extrusion type drain pipe is connected with the drain pipe on the ground; the press-out type drainage device leads the drainage valve group to the ground.
Furthermore, including arranging the damp pipe, arrange damp socle portion and be connected and communicate with each other with the air bed with buried pipeline's outer pillar, arrange damp pipe top and go out ground.
Furthermore, arrange the wet pipe top and exceed ground 0.5 meters, arrange the wet pipe top and set up down elbow in order to prevent that the rainwater from getting into.
According to the invention, the waterproof steel box is arranged at the underground and overground switching position, and the working pipe moves in the waterproof steel box, so that the pipeline thermal displacement is ensured to have enough compensation space. The drainage device is arranged at the heat-preservation compensation elbow, so that the operation is convenient and safe.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is an overall schematic view of the installation of the steel-sheathed-steel steam direct-buried insulating pipe of the invention;
FIG. 2 is a side view of the waterproof steel box and service pipe arrangement;
FIG. 3 is a top view of the arrangement of the waterproof steel box and the service pipe;
fig. 4 is a schematic view of the structure of the insulation compensating elbow.
In the figure, 1-ground fixed support, 2-heat preservation compensation bent pipe, 3-hydrophobic device, 4-rain-proof cap, 5-fixed support, 6-buried pipeline, 7-moisture removal pipe, 8-working pipe, 9-waterproof steel box, 10-concrete buttress, 11-ground, 12-ground movable support, 13-movable support in well, 14-rotary compensator, 15-hydrophobic pipe, 16-outer protective pipe, 17-heat preservation layer, 18-extrusion hydrophobic pipe, 19-steam flow direction and pipeline slope direction.
Detailed Description
In order that those skilled in the art will better understand the present invention, a more complete and complete description of the present invention is provided below in conjunction with the accompanying drawings and embodiments. In addition, the features of the embodiments and examples in the present application may be combined with each other without conflict.
Referring to fig. 1 to 3, a construction method of a steel-sheathed-steel steam direct-buried thermal insulation pipe according to a typical embodiment of the present invention includes an outer protective pipe 16, a thermal insulation layer 17, and a working pipe 8, wherein the working pipe 8 is concentrically sheathed inside the outer protective pipe 16, the thermal insulation layer 17 is disposed between the outer protective pipe 16 and the working pipe 8, and an air layer is formed between the thermal insulation layer 17 and the outer protective pipe 16; the steel sleeve steel steam direct-buried heat-insulation pipe is buried in a pipe ditch below the ground as a buried pipeline 6, a waterproof steel box 9 is installed at the position where the buried pipeline 6 enters the ground, the top of the waterproof steel box 9 is provided with a pipe outlet, the outer wall of the waterproof steel box 9 is in sealing and welding connection with an outer protecting pipe 16, and a working pipe 8 enters the waterproof steel box 9 from the pipe outlet of the waterproof steel box 9.
The key of the steel sleeve steel steam direct-buried prefabricated heat-insulating pipe is that a working environment which can be directionally, freely, telescopically and dry is provided for the working pipe underground, and the generated condensed water can be smoothly discharged out of the working pipe. According to the above embodiment, the working pipe 8 can move in the waterproof steel box 9, and it is ensured that the thermal displacement of the pipeline has enough compensation space.
The technical solutions and effects claimed by the present invention will be further clearly and completely described below by way of specific embodiments.
The whole construction process flow of the invention is as follows: the method comprises the steps of field measurement and paying-off → drawing of a calandria diagram → factory prefabrication and transportation → pipe trench excavation → cushion foundation treatment → field assembly and laying → moisture discharge pipe 7, waterproof steel box 9, fixing support 5 and drain pipe 15 installation → weld joint detection, pipeline test → field assembly port anticorrosion and heat preservation → backfill concealment.
On-site measurement pay-off
According to a design drawing, on-site and on-site measurement and recheck sizes are carried out, the construction environment and the underground original facilities are explored, barrier marks are set, and positioning and paying-off are carried out. The field measurement data provides accurate data for the manufacturing of the steel-sheathed-steel steam direct-buried heat-insulation pipe, the quantity of prefabrication of a steel-sheathed-steel steam direct-buried heat-insulation pipe factory and the length of each steel-sheathed-steel steam direct-buried heat-insulation pipe are determined, materials are saved, and meanwhile, sufficient preparation is made for pipe ditch excavation.
Drawing steel bushing steel calandria
And (3) splitting the integral steel sleeve steel steam direct-buried prefabricated heat-insulation pipeline according to a design drawing and field measurement, and drawing a pipe arrangement diagram. The calandria drawing is performed by considering the material arrival state and the field installation environment, so that the calandria drawing is performed for the purposes of convenient transportation and field installation. Wherein, the height of the outer protecting pipe 16 extending out of the ground is not less than 0.5m.
Drawing the steel-sheathed steel drawing calculates the expansion amount of the working pipe 8 according to the temperature of the working pipe 8, and marks the expansion amount and the reserved expansion space of the working pipe when providing a drawing for a prefabrication factory.
The calculation formula of the expansion amount of the pipeline is as follows: Δ L = aL (t 1-t 2), wherein: delta L is the thermal expansion amount of the pipeline, and the unit is millimeter; a is the thermal expansion coefficient of the pipe; l is the distance between the two fixed supports of the pipeline, and the unit is meter; t1 is the working temperature of the conveying medium, and the unit is; t2 is the air temperature at the time of pipeline installation in units of ℃. Factory prefabrication and transportation
And prefabricating the split steel sleeve steel pipe, the moisture discharge pipe, the fixed support, the drain pipe and other parts according to the drawn pipe arrangement diagram, and avoiding and reducing field cutting as much as possible.
When the prefabricated steel sleeve steel steam direct-buried insulating pipe is hoisted, the hoisting belt with the width larger than 50mm is used, the fastening steel pieces at the two ends of the steel pipe are checked before hoisting, and the prefabricated steel sleeve is firm and firm so as to avoid accidents or breakage of the prefabricated pipe caused by slippage of the working pipe after hoisting.
When loading or unloading, sleepers are arranged at bare pipe sections at two ends of the steel-sleeve steel steam direct-buried heat-insulating pipe, and the bare pipe sections are not allowed to be directly placed on the ground so as not to damage an anticorrosive coating. When loading, a flexible material (felt or straw bag) is padded between the vehicle bottom plate and the pipeline and is tightly bound by a rope to prevent collision or falling off during transportation.
The number of layers should not exceed 3, and the height is not more than 2m, and the middle layer should be padded with flexible anti-skid material. The crane is lightly hung, the crane cannot be dragged on the ground and among pipes so as to avoid damaging an anticorrosive coating, and the end head should be provided with a waterproof measure so as to avoid water inflow.
Pipe trench digging
After the pipe trench is excavated, the coordinate is checked, the bottom of the trench is tamped and filled with sand, and sharp-edged stone blocks are not needed, so that an anticorrosive coating outside the prefabricated heat-insulating pipe is prevented from being damaged. Effective drainage facilities should be arranged in the pipe ditches to ensure that underground water and rainwater are drained in time, and the heat-insulating layer 17 is not allowed to be immersed in water. And reserving a slope according to design requirements during pipe trench excavation.
Bedding foundation treatment
The elevation of the bottom of the pipe is strictly controlled during the construction of the pipeline foundation. The pipeline is laid on undisturbed soil foundation or on the foundation which is processed and backfilled compactly after grooving. The gravel cushion layer that the pipeline basis adopted, thickness should be according to the design requirement and carry out the bedding tamp. When the pipe ditch cushion layer is treated, the pipe ditch slope is leveled according to the design requirement, and the smooth drainage of the condensed water flow direction drainage part of the working pipe 8 is ensured.
On-site laying assembly
For ease of transportation, factory-fabricated piping is typically no longer than 12 meters in length. In order to improve the construction efficiency, the assembly welding can be firstly carried out outside the pipe trench during the assembly welding on site, but the assembly length outside the pipe trench is not too long, so that the damage of the inner structure of the steel sleeve steel pipe caused by the bending of the pipeline when the pipeline is put into the trench is avoided. And the cutting of the prefabricated steel sleeve steel prefabricated heat-preservation pipe is avoided on the spot.
The steel-sleeve steel steam direct-buried heat-insulation pipe comprises an outer protective pipe 16, a heat-insulation layer 17 and a working pipe 8, wherein the working pipe 8 is concentrically sleeved inside the outer protective pipe 16, the heat-insulation layer 17 is arranged between the outer protective pipe 16 and the working pipe 8, and an air layer is formed between the heat-insulation layer 17 and the outer protective pipe 16; the steel-sheathed-steel steam direct-buried heat-preservation pipe is used as a buried pipeline 6 and buried in a pipe ditch below the ground.
And the working pipes 8 are welded in pairs. The center of the working pipe is aligned, and the axial eccentricity does not exceed the design requirement. After the installation and connection of the working pipe 8 are completed, the fixed support welded at the end heads of the working pipe 8 and the outer protective pipe 16 is removed, and the main pipe is not damaged when the fixed support is removed. In addition, after the installation and connection of the working pipe 8 at the heat-preservation compensation elbow pipe are completed, the fixed support welded at the end heads of the working pipe 8 and the outer protective pipe 16 is also removed, otherwise, the elbow compensation is influenced. And (4) carrying out 100-percent X-ray flaw detection on the welding line of the working pipe 8, and handing over to the interface heat preservation and corrosion prevention process after the hydraulic test is qualified.
And the outer protective pipes 16 are welded in a pairing mode, and the welding is carried out after the interfaces of the working pipes 8 and the heat-insulating layer 17 are qualified. The outer protective pipe 16 interface welding is primed by argon arc welding and is subjected to 100% ultrasonic flaw detection. And (3) performing an air tightness test after the outer protective pipe 16 is welded, wherein the test pressure is 0.2Mpa, and checking by a method of coating soapy water after the pressure is stable, wherein no bubble is qualified. And performing corrosion prevention treatment in time after the product is qualified.
And (4) installing a moisture discharge pipe 7, a waterproof steel box 9, a fixed support 5 and a drain pipe 15.
The moisture exhaust pipe 7 is welded with the outer protective pipe 16 and communicated with an air layer, the moisture exhaust pipe 7 can exhaust moisture in the air layer to the atmosphere, the service life of the heat insulation material is prolonged, and the expansion of the air layer of the steel sleeve steel pipe due to temperature rise to form pressure can be prevented. The installation of the moisture exhaust pipe 7 is carried out before the welding of the outer protection pipe 16 groups is finished and the airtight test is carried out. Arrange damp pipe 7 and set up in the less department of outer pillar 16 axial displacement volume, combine fixing support 5 to set up jointly, and should avoid interior fixed bolster position when prefabricating to set up and arrange damp pipe 7 and reserve the mouth. The top of the moisture discharge pipe 7 is 0.5m higher than the ground, and the top of the moisture discharge pipe 7 is provided with a downward elbow to prevent rainwater from entering. After the moisture removing pipe 7 is installed, welding line detection and air tightness tests are carried out together with the outer protecting pipe 16.
And (5) manufacturing and installing the waterproof steel box 9. When the heat preservation compensation elbow 2 can not satisfy pipeline thermal displacement or needs set up the compensator in the underground, set up waterproof steel case 9 satisfies the required space of pipeline thermal displacement. The waterproof steel box 9 is arranged at the position where the underground pipeline 6 is turned from underground to ground or from ground to underground, namely the position of the junction between the underground pipeline 6 and the ground pipeline. Typically, a watertight steel box 9 is installed at the location where the buried pipeline 6 enters the ground. The waterproof steel box 9 is similar to a special-shaped compensation elbow pipe, and has enough space to meet the pipeline displacement compensation.
As shown in fig. 1, the waterproof steel box 9 and the outer protective pipe 16 are welded and connected in a sealing manner, the top of the waterproof steel box 9 is provided with a pipe outlet, and the working pipe 8 enters the waterproof steel box 9 from the pipe outlet. The waterproof steel box 9 is communicated with the air layer of the buried pipeline 6 and plays a role in removing damp. All welding seams of the waterproof steel box 9 are fully welded, and good waterproof performance is guaranteed.
The waterproof steel box 9 may be placed in a concrete well. A ground movable bracket 12 movably connected with the working pipe 8 is arranged on the ground 11 close to the outlet of the waterproof steel box 9.
The inner wall and the outer wall of the waterproof steel box 9 are both subjected to asphalt reinforcement level corrosion prevention. The top of the waterproof steel box 9 is provided with a pipe outlet and a manhole opening, the pipe outlet and the manhole opening are respectively provided with a rain-proof cap 4 or a rain-proof cover, the edge of the rain-proof cap 4 is provided with a water stopping edge, and water is prevented from entering the inside of the waterproof steel box 9. As shown in fig. 2, an in-well movable support 13 movably connected with the working pipe 8 is arranged inside the waterproof steel box 9, the ground movable support 12 and the in-well movable support 13 are both arranged on the concrete buttress 10, and as shown in fig. 3, the elbow of the working pipe 8 is connected by a rotary compensator 14 when the working pipe turns in the waterproof steel box 9.
The fixed support 5 is divided into an inner fixed support, an outer fixed support and an inner fixed support and an outer fixed support. The inner fixed support can only bear bidirectional balance thrust and is generally arranged in the middle of the buried pipeline 6; the outer fixed support fixes the outer protective pipe 16 without displacement; the inner fixed support and the outer fixed support are subjected to unidirectional thrust or unbalanced bidirectional thrust, concrete piers are poured on the inner fixed support and the outer fixed support according to the magnitude of the thrust, and the fixed supports are poured inside the concrete piers. The two sides of the fixed support 5 are provided with corrugated expansion joints, the corrugated expansion joints and the fixed support are prefabricated together in a factory, the flow direction is marked, and the corrugated expansion joints are installed on site according to the flow direction.
And arranging an extrusion type drainage device. The traditional drain pipe needs to be provided with a valve operation well and a condensate well and is arranged near a fixed pier. However, in practical application, although the valve operation well and the water condensation well are separately arranged, the valve operation well and the drainage well cannot be strictly separated due to expansion caused by heat and contraction caused by cold of the drainage pipe, a large amount of condensed water or steam still exists in the valve operation well, and people cannot enter the valve operation well to operate or the operation environment is unsafe.
The extrusion type drainage device is arranged at the heat-preservation compensation bent pipe 2, as shown in figure 4, the heat-preservation compensation bent pipe 2 is a section of bent pipe of a buried pipeline 6 at the position out of the ground, one end of the heat-preservation compensation bent pipe 2 is out of the ground, and the other end of the heat-preservation compensation bent pipe is connected with a straight pipe section of the buried pipeline 6. The working pipe 8 connected with one end of the heat preservation compensation elbow pipe 2, which is out of the ground, is fixedly connected with the ground fixing support 1 arranged on the ground. The working pipe 8 of the heat preservation compensation bent pipe 2 is internally provided with a pressing-out type drain pipe 18, the pressing-out type drain pipe 18 extends into the lowest point of the working pipe 8, and the front end of the pressing-out type drain pipe 18 is of an inclined plane structure, so that the opening area is increased. The pressing-out drain pipe 18 is connected with the ground drain pipe 15; the pressing-out type drainage device leads the drainage valve assembly to the ground. Compared with the traditional drainage device, the drainage device is convenient and quick to construct, saves cost, is convenient to operate and guarantees personal safety.
On-site assembly port corrosion-resistant heat-preservation device
After the working pipe is qualified in radiographic inspection and pressure test, the welding seam of the working pipe is derusted, anticorrosive and insulated. And after the ultrasonic detection and the air tightness test of the outer protective pipe 16 are qualified, the outer protective pipe 16 is subjected to rust removal and corrosion prevention. The heat insulation structure and the heat insulation material of the heat insulation compensation elbow 2 are the same as those of the straight pipe section; the heat-insulating compensation elbow pipe 2 is constructed under the conditions of no water accumulation in the ditch and no rainy days. The heat-insulating layer in the heat-insulating compensation bent pipe 2 is tightly connected with the heat-insulating layer of the straight pipe section, and no gap is formed. The outer protecting pipe anticorrosive coating should adopt the electric spark leak detector to detect, and the discovery damage is in time repaired. After the buried pipeline 6 is installed on site, the exposed part of the heat insulation material must be sealed.
Backfill concealment
Before backfilling and concealing, the straightness of the pipeline and the corrosion resistance quality of the pipeline are checked and adjusted again. During backfilling, sand is filled according to design rules, the backfilled sand is sieved, sharp-edged stones and large sundries are not allowed to exist, and the backfilled soil is covered layer by layer after the sand is filled, and is tamped layer by layer.
The scope of the invention is not limited to the above embodiments, and various modifications and changes may be made by those skilled in the art, and any modifications, improvements and equivalents within the spirit and scope of the invention are intended to be included therein.
Claims (9)
1. A steel-sheathed-steel steam direct-buried heat-insulation pipe construction method comprises an outer protective pipe, a heat-insulation layer and a working pipe, wherein the working pipe is concentrically sheathed inside the outer protective pipe, the heat-insulation layer is arranged between the outer protective pipe and the working pipe, and an air layer is formed between the heat-insulation layer and the outer protective pipe; the steel-sheathed-steel steam direct-buried insulating pipe is buried in a pipe ditch below the ground as a buried pipeline, and is characterized in that: the position of the buried pipeline entering the ground is provided with a waterproof steel box, the top of the waterproof steel box is provided with a pipe outlet, the outer wall of the waterproof steel box is connected with an outer protective pipe in a sealing and welding mode, and a working pipe enters the waterproof steel box from the pipe outlet of the waterproof steel box.
2. The steel-sheathed-steel steam-direct-burial thermal insulation pipe construction method according to claim 1, characterized in that: the waterproof steel box is arranged in the concrete well.
3. The construction method of the steel-sheathed-steel steam-direct-buried heat-insulating pipe according to claim 1 or 2, characterized in that: the waterproof steel box is communicated with an air layer of the buried pipeline.
4. The construction method of the steel-sheathed-steel steam direct-buried heat-insulating pipe according to claim 3, characterized in that: the outlet pipe mouth at waterproof steel case top is provided with rain-proof cap, and rain-proof cap edge is provided with stagnant water along.
5. The steel-sheathed-steel steam-direct-burial thermal insulation pipe construction method according to claim 1 or 4, characterized in that: a ground movable support movably connected with the working pipe is arranged on the ground close to the outlet of the waterproof steel box.
6. The steel-sheathed-steel steam-direct-burial thermal insulation pipe construction method according to claim 5, characterized in that: the interior of the waterproof steel box is provided with an in-well movable support movably connected with the working pipe.
7. The steel-sheathed-steel steam-direct-burial thermal insulation pipe construction method according to claim 1 or 6, characterized in that: the buried pipeline at the position out of the ground is a heat-preservation compensation bent pipe, an extrusion type drain pipe is arranged in a working pipe in the heat-preservation compensation bent pipe, the extrusion type drain pipe extends into the lowest point of the working pipe, the front end of the extrusion type drain pipe is of an inclined plane structure, and the extrusion type drain pipe is connected with the drain pipe on the ground; the press-out type drainage device leads the drainage valve group to the ground.
8. The steel-sheathed-steel steam-direct-burial thermal insulation pipe construction method according to claim 7, characterized in that: including arranging damp pipe, arrange damp socle portion and be connected with buried pipeline's outer pillar and communicate with each other with the air bed, arrange damp pipe top and go out ground.
9. The construction method of the steel-sheathed-steel steam direct-buried heat-insulating pipe according to claim 8, characterized in that: the top of the moisture discharge pipe is 0.5 meter higher than the ground, and the top of the moisture discharge pipe is provided with a downward elbow to prevent rainwater from entering.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8803519D0 (en) * | 1983-05-20 | 1988-10-04 | Moeller As I C | SUIT ON THE CONSTRUCTION OF UNDERGROUND HEAT-INSULATED SPRING CONTROL AFFAIRS WITH CROCKET DRAWINGS |
| CN102937222A (en) * | 2012-11-08 | 2013-02-20 | 武汉德威工程技术有限公司 | Buried type rotating compensator |
| 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 |
| KR101458917B1 (en) * | 2014-03-24 | 2014-11-10 | 조인트유창써멀시스템 주식회사 | Landfill type expansion joint of insulated double pipe for having air cooling device |
| CN205859584U (en) * | 2016-07-25 | 2017-01-04 | 天津市泰达工程设计有限公司 | A kind of hydrophobic structure of jet chimney |
| CN206093342U (en) * | 2016-10-09 | 2017-04-12 | 高百争 | Prefabricated direct -burried rotation compensator container |
| 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 |
| CN206458896U (en) * | 2017-01-12 | 2017-09-01 | 湖南省轻工纺织设计院 | Steam pressure pipeline |
| CN107237924A (en) * | 2017-07-06 | 2017-10-10 | 中化二建集团有限公司 | A kind of construction method of installation of the long distance pipeline laid along irrigation canals and ditches periphery |
| CN108591668A (en) * | 2018-07-20 | 2018-09-28 | 大连科华热力管道有限公司 | A kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney |
| CN212377537U (en) * | 2020-04-08 | 2021-01-19 | 天津太合节能科技有限公司 | Upward-returning elbow with large compensation amount for direct-buried steam pipeline |
| CN213271488U (en) * | 2020-07-28 | 2021-05-25 | 中国市政工程中南设计研究总院有限公司 | Outer protective pipe insulation structure of direct-buried steam heat-preservation pipe system |
| CN216158570U (en) * | 2021-09-08 | 2022-04-01 | 武汉市燃气热力规划设计院有限公司 | Steel bushing steel compensation structure for directly-buried steam pipeline with hydrophobic joint |
| CN216619369U (en) * | 2021-12-10 | 2022-05-27 | 国家能源集团新能源技术研究院有限公司 | Hydrophobic structure of steel bushing steel direct-burried steam pipeline |
-
2023
- 2023-01-10 CN CN202310034102.4A patent/CN115750915A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8803519D0 (en) * | 1983-05-20 | 1988-10-04 | Moeller As I C | SUIT ON THE CONSTRUCTION OF UNDERGROUND HEAT-INSULATED SPRING CONTROL AFFAIRS WITH CROCKET DRAWINGS |
| 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 |
| CN102937222A (en) * | 2012-11-08 | 2013-02-20 | 武汉德威工程技术有限公司 | Buried type rotating compensator |
| KR101458917B1 (en) * | 2014-03-24 | 2014-11-10 | 조인트유창써멀시스템 주식회사 | Landfill type expansion joint of insulated double pipe for having air cooling device |
| CN205859584U (en) * | 2016-07-25 | 2017-01-04 | 天津市泰达工程设计有限公司 | A kind of hydrophobic structure of jet chimney |
| CN206093342U (en) * | 2016-10-09 | 2017-04-12 | 高百争 | Prefabricated direct -burried rotation compensator container |
| 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 |
| CN206458896U (en) * | 2017-01-12 | 2017-09-01 | 湖南省轻工纺织设计院 | Steam pressure pipeline |
| CN107237924A (en) * | 2017-07-06 | 2017-10-10 | 中化二建集团有限公司 | A kind of construction method of installation of the long distance pipeline laid along irrigation canals and ditches periphery |
| CN108591668A (en) * | 2018-07-20 | 2018-09-28 | 大连科华热力管道有限公司 | A kind of steel bushing steel bend pipe hydrophobic structure of connection direct-burried and aerial jet chimney |
| CN212377537U (en) * | 2020-04-08 | 2021-01-19 | 天津太合节能科技有限公司 | Upward-returning elbow with large compensation amount for direct-buried steam pipeline |
| CN213271488U (en) * | 2020-07-28 | 2021-05-25 | 中国市政工程中南设计研究总院有限公司 | Outer protective pipe insulation structure of direct-buried steam heat-preservation pipe system |
| CN216158570U (en) * | 2021-09-08 | 2022-04-01 | 武汉市燃气热力规划设计院有限公司 | Steel bushing steel compensation structure for directly-buried steam pipeline with hydrophobic joint |
| CN216619369U (en) * | 2021-12-10 | 2022-05-27 | 国家能源集团新能源技术研究院有限公司 | Hydrophobic structure of steel bushing steel direct-burried steam pipeline |
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