阅读说明：本技术 一种埋地管道防冻结构及其施工方法 (Anti-freezing structure of buried pipeline and construction method thereof ) 是由 王海峰 崔国胜 王俊 聂华 于 2020-12-31 设计创作，主要内容包括：本申请涉及一种埋地管道防冻结构及其施工方法,属于管道保护技术的领域,其包括管槽和管道,管道敷设在管槽内,管道的外层套设有外管,管道与外管之间设置有用于支撑管道的支撑件,管槽内填装有回填料,管道的外侧设有用于加热管道外壁的加热元件。管槽内的回填料作为第一层抗冻防护,对管道外的环境温度进行隔离,再由外管以及外管、管道之间的腔作为第二、三层抗冻防护,进一步减少管道与外界的直接接触,并且在极端天气下,工作人员还可通过启动加热元件,对管道进行加热,全方位对管道起到抗冻保护作用,本申请具有提高管道抗冻效果的优点。(The utility model relates to a buried pipeline anti-freezing structure and construction method thereof, which belongs to the field of pipeline protection technology and comprises a pipe groove and a pipeline, wherein the pipeline is laid in the pipe groove, an outer pipe is sleeved on the outer layer of the pipeline, a support member for supporting the pipeline is arranged between the pipeline and the outer pipe, backfill material is filled in the pipe groove, and a heating element for heating the outer wall of the pipeline is arranged on the outer side of the pipeline. The backfill material of tube seat is as the frost-resistant protection of first layer, keeps apart the outer ambient temperature of pipeline, is regarded as second, the frost-resistant protection of three-layer by outer tube and outer tube, the chamber between the pipeline again, further reduces pipeline and external direct contact to under extreme weather, the staff still can be through starting heating element, heats the pipeline, the all-round frost-resistant guard action that plays to the pipeline, this application has the advantage that improves the frost-resistant effect of pipeline.)

1. The utility model provides a buried pipeline structure of preventing frostbite which characterized in that: the pipeline comprises a pipe groove (1) and a pipeline (2), wherein the pipeline (2) is laid in the pipe groove (1), an outer layer of the pipeline (2) is sleeved with an outer pipe (3), a supporting piece (4) used for supporting the pipeline (2) is arranged between the pipeline (2) and the outer pipe (3), a backfill material (5) is filled in the pipe groove (1), and a heating element (6) used for heating the outer wall of the pipeline (2) is arranged on the outer side of the pipeline (2).

2. A buried pipeline anti-freezing structure as claimed in claim 1, wherein: support piece (4) include a plurality of support bars (41), support bar (41) are along pipeline (2) length direction rigid coupling on the outer wall of pipeline (2), and are a plurality of support bar (41) are along pipeline (2) circumference interval distribution, the one end butt that pipeline (2) were kept away from in support bar (41) is on the inner wall of outer tube (3).

3. A buried pipeline anti-freezing structure as claimed in claim 2, wherein: the heating element (6) comprises a plurality of electric heating coils (61), the electric heating coils (61) are sleeved on the outer wall of the pipeline (2), and the electric heating coils (61) are arranged at intervals along the length direction of the pipeline (2).

4. A buried pipeline anti-freezing structure as claimed in claim 3, wherein: the bottom of the outer pipe (3) is provided with a water outlet (31) communicated with the inside of the outer pipe (3).

5. A buried pipeline anti-freezing structure as claimed in claim 4, wherein: a plurality of gaps (42) are arranged on the supporting bar (41) at intervals.

6. A buried pipeline anti-freezing structure as claimed in claim 1 or 4, wherein: the backfill material (5) sequentially comprises a waterproof layer (51), an insulating layer (52) and a moisture-proof layer (53) from top to bottom.

7. A buried pipeline anti-freezing structure as claimed in claim 6, wherein: the level of the top wall of the moisture-proof layer (53) is higher than that of the water outlet (31).

8. A buried pipeline anti-freezing structure as claimed in claim 1, wherein: and a noise reduction layer (32) is arranged on the inner wall of the outer tube (3).

9. A construction method of an anti-freezing structure of a buried pipeline including the anti-freezing structure of a buried pipeline of claim 7, comprising the steps of:

s1, constructing the pipe groove (1), excavating the pipe groove (1), and plastering the inner wall of the pipe groove (1);

s2, the pipeline (2) is in place, and the pipeline (2) and the outer pipe (3) are sleeved;

s3, paving the moisture-proof layer (53) as a bottom layer in the pipe groove (1), hanging the outer pipe (3), stably placing the outer pipe on the bottom layer, and continuously paving the moisture-proof layer (53) to the elevation;

s4, paving the heat insulation layer (52) in the pipe groove (1), wherein the heat insulation layer (52) is submerged in the outer pipe (3) to reach the elevation;

s5, paving a waterproof layer (51) in the pipe groove (1), paving the waterproof layer (51) to be flush with the ground, and maintaining and forming.

Technical Field

The application relates to the field of pipeline protection technology, in particular to a buried pipeline anti-freezing structure and a construction method thereof.

Background

In recent years, with the rapid development of Chinese market economy and the improvement of national strength, various high-tech technical levels are continuously improved, and a new development platform is won in the construction industry. Industrial pipeline construction engineering, which is an indispensable project for national development, is also scientifically managed and gradually developed. In the process of anti-freezing and heat-insulating of the pipeline, the industrial pipeline construction process is the center of the whole project, and the quality and the progress of the project are determined by the quality of the equipment process technology, so that the economic benefit of an enterprise is determined.

In cold areas, industrial pipelines need to be prevented from freezing, and the pipelines are mostly buried in the ground to ensure that media in the pipelines cannot be frozen.

With respect to the related art among the above, there are the following drawbacks: for the areas with abundant underground rock soil, the pipeline is buried below the freezing line, the required cost is huge, the technological requirement is higher, and the construction period is long.

Disclosure of Invention

The application provides an anti-freezing structure of a buried pipeline and a construction method thereof, aiming at providing a pipeline which can effectively prevent freezing on a freezing line.

In a first aspect, the application provides a buried pipeline anti-freezing structure, which adopts the following technical scheme:

the utility model provides a buried pipeline anti-freezing structure, includes chase and pipeline, the pipeline lays in the chase, the outer cover of pipeline is equipped with the outer tube, be provided with the support piece that is used for supporting the pipeline between pipeline and the outer tube, the chase is filled with the backfill, the outside of pipeline is equipped with the heating element who is used for heating the pipeline outer wall.

Through adopting above-mentioned technical scheme, the backfill in the tube seat is as the frost protection of first layer, keep apart the outside ambient temperature of pipeline, again by outer tube and outer tube, chamber between the pipeline is as the second, the frost protection of three-layer, further reduce pipeline and external direct contact, play cold-proof effect to the pipeline, and under extreme weather, the staff is through observing the pipeline in the pipeline liquid flow reduce the back in the pipeline export, there is the part condition of freezing promptly on the pipeline inner wall, can start heating element, heat the pipeline, the all-round frost protection effect that plays to the pipeline, be applicable to laying of pipeline more than the frozen line, construction cost is lower, construction cycle is short.

Optionally, support piece includes a plurality of support bars, the support bar is along pipeline length direction rigid coupling on the outer wall of pipeline, and is a plurality of the support bar is along pipeline circumference interval distribution, the one end butt that the pipeline was kept away from to the support bar is on the inner wall of outer tube.

Through adopting above-mentioned technical scheme, when the piping erection was in the outer tube, the pipeline passed through the support bar and supported in the outer tube, reduced pipeline and outer tube direct contact, effectively reduced the heat exchange to, the support bar can make the pipeline steady mounting in the outer tube, improves the piping erection stability.

Optionally, the heating element includes a plurality of electric heating coils, the electric heating coils are sleeved on the outer wall of the pipeline, and the plurality of electric heating coils are arranged at intervals along the length direction of the pipeline.

Through adopting above-mentioned technical scheme, after the staff started electric heating coil, electric heating coil was to pipeline a week synchronous heating, made the freezing that appears in the pipeline all directions can both dissolve fast, improved the frost-resistant function of pipeline.

Optionally, a water outlet communicated with the inside of the outer pipe is formed at the bottom of the outer pipe.

Through adopting above-mentioned technical scheme, between outer tube and pipeline steam in the air liquefies out the water droplet on the inner wall of outer tube after, the delivery port discharge of outer tube bottom can be followed to the comdenstion water, effectively reduces steam between outer tube and the pipeline, improves the heat-proof quality of outer tube and pipeline spare air, further improves the freeze proof effect of pipeline.

Optionally, a plurality of notches are arranged on the supporting bar at intervals.

Through adopting above-mentioned technical scheme, the breach on the support bar can make the comdenstion water on the outer tube inner wall discharge from the delivery port smoothly, improves the heat-proof quality of outer tube and pipeline spare air.

Optionally, the backfill material sequentially comprises a waterproof layer, a heat insulation layer and a damp-proof layer from top to bottom.

Through adopting above-mentioned technical scheme, lay dampproof course, heat preservation and waterproof layer in proper order from bottom to top in the chase, can effectively prevent subaerial surface groundwater from oozing to and the underground moisture upwells, effectively reduces steam in the backfill layer, improves backfill layer heat preservation effect, and medial heat preservation can play the heat preservation effect to outer tube and pipeline, improves the frost resisting effect of pipeline.

Optionally, the level of the top wall of the moisture-proof layer is higher than the level of the water outlet.

Through adopting above-mentioned technical scheme, submerge the delivery port on the outer tube with the dampproof course, after the comdenstion water in the air flows out from the delivery port for the first time between outer tube and pipeline, the dampproof course can the active absorption comdenstion water to prevent effectively that moisture from getting into between outer tube and the pipeline from the delivery port on the outer tube once more, improve the frost resisting effect of pipeline.

Optionally, a noise reduction layer is arranged on the inner wall of the outer tube.

By adopting the technical scheme, when liquid flows in the pipeline, the pipeline is easy to vibrate, air between the outer pipe and the pipeline is driven to vibrate, noise is easy to generate due to mutual friction between the air, and the noise reduction layer on the inner wall of the outer pipe can effectively absorb and reduce noise, so that the quiet and harmonious surrounding environment is kept.

In a second aspect, the application provides a construction method of an anti-freezing structure of a buried pipeline, which adopts the following technical scheme:

a construction method of an anti-freezing structure of a buried pipeline comprises the following steps:

s1, constructing the pipe chase, excavating the pipe chase, and plastering the inner wall of the pipe chase;

s2, positioning the pipeline, and sleeving the pipeline and the outer pipe;

s3, paving the moisture-proof layer in the pipe groove to serve as a bottom layer, hanging the outer pipe, stably placing the outer pipe on the bottom layer, and continuously paving the moisture-proof layer to an elevation;

s4, paving the heat insulation layer in the pipe groove, wherein the heat insulation layer submerges the outer pipe to reach the elevation;

and S5, paving a waterproof layer in the pipe groove, paving the waterproof layer until the waterproof layer is flush with the ground, and maintaining and forming.

By adopting the technical scheme, when the pipeline is paved on the underground freezing line, the double-layer pipeline form is adopted, heat insulation is realized, the damp-proof layer is used as the bottom, the waterproof layer is used as the top, the damp-proof and water-proof effects are realized, the backfill material backfilled in the pipe groove is ensured to be dry, the heat insulation performance is better, and the anti-freezing effect of the pipeline is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the backfill in the pipe groove is used as a first layer of anti-freezing protection to isolate the environment temperature outside the pipeline, and then the outer pipe, the cavity between the outer pipe and the pipeline are used as a second layer of anti-freezing protection and a third layer of anti-freezing protection to further reduce the direct contact between the pipeline and the outside;

2. after water drops are liquefied from water vapor in the air between the outer pipe and the pipeline on the inner wall of the outer pipe, condensed water is discharged from a water outlet at the bottom of the outer pipe, the water vapor between the outer pipe and the pipeline is effectively reduced, the heat insulation performance of the outer pipe and the air of a pipeline piece is improved, and the anti-freezing effect of the pipeline is further improved;

3. the moisture-proof layer is arranged at the position, close to the outer pipe, of the outer pipe, the moisture-proof layer is arranged on the outer.

Drawings

Fig. 1 is a schematic plane pavement structure of a buried pipeline structure according to an embodiment of the present application.

Fig. 2 is a partial sectional structural schematic view of an outer pipe of a buried pipeline structure according to an embodiment of the present application.

Description of reference numerals: 1. a pipe groove; 2. a pipeline; 3. an outer tube; 31. a water outlet; 32. a noise reduction layer; 4. a support member; 41. a supporting strip; 42. a notch; 5. backfilling; 51. a waterproof layer; 52. a heat-insulating layer; 53. a moisture barrier; 6. a heating element; 61. an electric heating coil.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses buried pipeline structure of preventing frostbite. Referring to fig. 1, a buried pipeline 2 structure includes a pipe chase 1, backfill 5, an outer pipe 3, and a pipeline 2. In this embodiment, the cross section of the pipe groove 1 is a trapezoid with a small lower part and a large upper part, and the vertical depth of the bottom surface of the pipe groove 1 is not higher than the depth of a freezing line under the ground. The backfill 5 is sequentially provided with a moisture-proof layer 53, an insulating layer 52 and a waterproof layer 51 from bottom to top, the outer pipe 3 is laid between the moisture-proof layer 53 and the insulating layer 52, and the pipeline 2 is installed in the outer pipe 3 in a penetrating way.

In this embodiment, the moisture-proof layer 53 may be made of quicklime, and the heat-insulating layer 52 may be made of coal ash. The waterproof layer 51 is cement mortar poured on the surface of the insulating layer 52, and the surface layer of the waterproof layer 51 is flush with the ground. The outer tube 3 can be a PVC transparent steel wire anti-freezing hose, and the bottom of the outer tube 3 is embedded in the moisture-proof layer 53. The bottom of the outer pipe 3 is provided with water outlets 31 at intervals, and the water outlets 31 are buried in the moisture-proof layer 53.

Referring to fig. 1 and 2, the pipe 2 is inserted into the outer pipe 3, and a gap is left between the pipe 2 and the outer pipe 3. The pipe 2 and the outer pipe 3 are supported by the supporting piece 4, so that the outer pipe 3 is not in direct contact with the outer wall of the pipe 2. In this embodiment, the support member 4 is a support bar 41, the support bar 41 is welded and fixed on the outer wall of the pipeline 2, the support bar 41 is arranged along the length direction of the pipeline 2, and the support bar 41 is arranged at intervals along the circumferential direction of the pipeline 2 at least two. The edge of the brace bar 41 remote from the pipe 2 abuts against the inner wall of the outer pipe 3. In order to facilitate the easy discharge of the condensed water easily generated on the outer tube 3 from the water outlet 31, the edge of the support bar 41 far away from the pipeline 2 is provided with a plurality of notches 42, the notches 42 are arranged at intervals along the length direction of the support bar 41, the number of the notches 42 is the same as that of the water outlets 31, and the distance between every two notches 42 is the same as that between every two water outlets 31.

In order to reduce the noise generated by air friction between the pipeline 2 and the outer pipe 3 when the liquid in the pipeline 2 passes through, a noise reduction layer 32 is arranged on the inner wall of the outer pipe 3. In this embodiment, the noise reduction layer 32 is made of sound absorption foam and adhered to the inner wall of the outer tube 3 by glue. The sound-absorbing foam has a poor heat conductivity coefficient and also has a heat-insulating effect.

The pipeline 2 is further provided with a heating element 6 capable of actively heating the pipeline 2, in this embodiment, the heating element 6 adopts an electric heating coil 61 to heat the pipeline 2 in an electric heating mode. Electric heating coil 61 laminating pipeline 2 installation, electric heating coil 61's the outside adopts insulating plastic layer cladding, and electric heating coil 61 covers on locating pipeline 2 to along the even interval distribution of 2 length directions on the pipeline. The electric heating coils 61 on the pipeline 2 are connected in series in different areas, and the electric heating coils 61 in different areas adopt independent power supply equipment. The power supply device may be a photovoltaic energy storage cell.

The implementation principle of the anti-freezing structure of the buried pipeline in the embodiment of the application is as follows: the backfill material 5 in the pipe groove 1 is used as a first layer for anti-freezing protection, and is used for isolating the environment temperature outside the pipeline 2, and then the cavity between the outer pipe 3 and the pipeline 2 is used as a second and a third layer for anti-freezing protection, so that the direct contact between the pipeline 2 and the outside is further reduced, and the pipeline 2 is kept warm. In backfill 5, waterproof layer 51 near the earth's surface can effectively completely cut off surface water and stretch into heat preservation 52, and the dampproof course 53 shell prevents effectively that underground moisture from upwelling into heat preservation 52 in, and under the two-layer combining action, keep outer tube 3 dry around, keep heat preservation 52 effect.

And under extreme weather, the staff can learn that there is the partial condition of freezing on the pipeline 2 inner wall through observing the pipeline 2 interior liquid flow reduction back at the pipeline 2 export. At this moment, through starting electric heating coil 61, generate heat through electric heating coil 61 and heat pipeline 2, the interior freezing of time pipeline 2 dissolves, and the all-round frost protection effect that plays pipeline 2 ensures that the interior liquid of pipeline 2 normally flows. The construction method is suitable for laying the pipeline 2 above the freezing line, and has the advantages of low construction cost, short construction period and good heat preservation effect.

The embodiment of the application also discloses a construction method of the anti-freezing structure of the buried pipeline. The method comprises the following steps:

s1, excavating the pipe groove 1 to a calibrated depth, and smearing waterproof mortar on the inner groove wall and the bottom wall of the pipe groove 1;

s2, positioning the pipeline 2, installing an electric heating coil 61 outside the pipeline 2, and penetrating the pipeline 2 into the outer pipe 3 for later use;

s3, paving a lime moisture-proof layer 53 as a bottom layer in the pipe chase 1, hoisting the standby outer pipe 3 into the pipe chase 1 through a crane, manually righting the outer pipe 3 to place the outer pipe 3 on the bottom layer, and then continuously paving the lime moisture-proof layers 53 on two sides of the outer pipe 3 until the outer pipe 3 can be stabilized in the moisture-proof layer 53;

s4, paving the coal ash as the heat-insulating layer 52 in the pipe chute 1, compacting the heat-insulating layer 52 in a layering and multi-time mode, and stopping paving the heat-insulating layer 52 to reach the elevation after the heat-insulating layer 52 is submerged at the top of the outer pipe 3;

and S5, pouring concrete into the pipe chase 1 until the concrete is flush with the ground, and curing and forming.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.