CN113224723A - Electric power engineering pipeline and construction method thereof - Google Patents
Electric power engineering pipeline and construction method thereof Download PDFInfo
- Publication number
- CN113224723A CN113224723A CN202110674060.1A CN202110674060A CN113224723A CN 113224723 A CN113224723 A CN 113224723A CN 202110674060 A CN202110674060 A CN 202110674060A CN 113224723 A CN113224723 A CN 113224723A
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- pipeline
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- fixed
- electric power
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- 238000010276 construction Methods 0.000 title claims abstract description 12
- 238000009434 installation Methods 0.000 claims description 10
- 238000004870 electrical engineering Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 230000003628 erosive effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
Abstract
The application relates to an electric power engineering pipeline, relates to the construction field of the electric power engineering pipeline, and comprises a pipeline body; the concrete pipeline is wrapped outside the pipeline body; the fixing rods are fixed on the outer wall of the pipeline body and embedded into the concrete pipeline; the limiting plate is fixed on the fixing rod and embedded into the concrete pipeline; the fixed rod is arranged along the radial direction of the pipeline body, the diameter of the limiting plate is larger than that of the fixed rod, and the limiting plate is exposed out of the concrete pipeline; the concrete pipe does not cover the both ends of pipeline body, fixes a plurality of connecting rods on the outer wall of pipeline body, is fixed with the go-between on the connecting rod, fixed connection between the go-between on two adjacent pipeline bodies is equipped with the opening on the go-between, has watered concrete layer between go-between and the pipeline body. This application has prolonged the life of electric power engineering pipeline.
Description
Technical Field
The application relates to the field of construction of electric power engineering pipelines, in particular to an electric power engineering pipeline and a construction method thereof.
Background
During the process of conveying high voltage electricity, two types are generally adopted, namely high-altitude erection and underground burying, the high-altitude erection only needs an iron stand, and underground laying needs to dig a trench and lay an electric power engineering pipeline, so that the power cable is protected from being damaged by underground substances.
In the use process of the electric power engineering pipeline, the electric power engineering pipeline is buried under the ground for a long time, so the service life of the electric power engineering pipeline is important.
Disclosure of Invention
In order to prolong the service life of the electric power engineering pipeline, the application provides the electric power engineering pipeline and the construction method thereof.
In a first aspect, the power engineering pipeline provided by the application adopts the following technical scheme:
an electrical engineering pipe comprising
A pipe body;
the concrete pipeline is wrapped outside the pipeline body;
the fixing rods are fixed on the outer wall of the pipeline body and embedded into the concrete pipeline; and
the limiting plate is fixed on the fixing rod and embedded into the concrete pipeline;
the fixed rod is arranged along the radial direction of the pipeline body, the diameter of the limiting plate is larger than that of the fixed rod, and the limiting plate is exposed out of the concrete pipeline.
Through adopting above-mentioned technical scheme, through the outside parcel at the pipeline body at the concrete pipe, thereby after burying electric power engineering pipeline underground, the concrete pipe covers the pipeline body, thereby underground water branch to the erosion of pipeline body has been reduced, and after electric power engineering pipelaying is accomplished, the staff is when carrying out the laying of other pipelines, this electric power engineering pipeline is owing to have the protection of concrete pipe to the pipeline body, this electric power engineering is difficult to be broken by digging, the life of electric power engineering pipeline has been prolonged.
Optionally, the two ends of the pipeline body extend out of the two ends of the concrete pipeline, a plurality of connecting rods are fixed on the outer wall of the pipeline body, connecting rings are fixed on the connecting rods, the connecting rings on two adjacent pipeline bodies are fixedly connected, openings are formed in the connecting rings, and concrete layers are poured between the connecting rings and the pipeline body.
Optionally, the opening on the connection ring is arranged upward.
Through adopting above-mentioned technical scheme, the staff is when installing fixedly two electric power engineering pipelines, at first put into the slot with the electric power engineering pipeline, and make the opening on the go-between up, then dock the pipeline body among two electric power engineering pipelines, then carry out welded fastening to the contact jaw of two pipeline bodies from the inside of pipeline body, then the staff pours the concrete into through the opening part on two go-between, treat to form concrete layer after the concrete solidifies, concrete layer is fine protects the junction of two pipeline bodies, thereby the erosion of underground water and moisture to two pipeline body junctions has been reduced, the life of electric power engineering pipeline has been prolonged.
Optionally, the connecting rod is arranged along a radial direction of the pipe body.
Through adopting above-mentioned technical scheme, set up through the radial direction that makes the connecting rod along the pipeline body to make the both ends of connecting rod can be better be connected pipeline body and go-between fixedly, improved the stability of go-between when pouring the concrete between go-between and pipeline body.
Optionally, a supporting assembly for supporting the electric wire is arranged on the inner wall of the pipeline body;
the supporting component comprises a supporting frame fixed on the inner wall of the pipeline body and a plurality of supporting plates fixed on the supporting frame.
Optionally, the support plate is an arc plate.
Through adopting above-mentioned technical scheme, set up the support frame through the inside at the pipeline body to fixed curved backup pad in the support frame installation, thereby utilize the backup pad to support the electric wire, and then when ground takes place to vibrate, make the electric wire be difficult for dropping from the backup pad, improved the stability that the backup pad supported the electric wire.
Optionally, the support assembly further comprises a threaded rod rotatably connected to the support frame, a sliding rod fixed on the support frame, a lifting plate in threaded connection with the threaded rod, an installation frame arranged on the lifting plate, and a support wheel rotatably connected with the installation frame;
the supporting wheels rotate along the conveying direction of the electric wire, the supporting wheels are located between every two adjacent supporting plates, and the supporting wheels are used for supporting and conveying the electric wire.
Optionally, the support wheels and the support plate are distributed at intervals.
Through adopting above-mentioned technical scheme, when the staff carried the electric wire, the staff accessible rotated the threaded rod for the lifter plate rises on the threaded rod, thereby makes the supporting wheel exceed the backup pad, then on the staff placed the supporting wheel with the electric wire, stimulates the electric wire again after that, thereby has reduced staff's intensity of labour, has also reduced the contact of electric wire with the backup pad, has reduced the wearing and tearing to the backup pad to the electric wire.
Optionally, a flange is fixed at the bottom of the threaded rod and used for connecting a power device.
Through adopting above-mentioned technical scheme, through the fixed ring flange of installing in the bottom of threaded rod to when the height of supporting wheel is adjusted through rotating the threaded rod to needs, the staff can select to use power device to be connected to on the ring flange, then utilizes power device drive supporting wheel to go up and down, thereby has reduced staff's intensity of labour.
In a second aspect, the construction method of the electric power engineering pipeline provided by the application adopts the following technical scheme:
the construction method of the electric power engineering pipeline comprises the following steps:
pouring concrete outside the pipeline body in advance to form a concrete pipeline;
the method comprises the following steps that (1) towards an electric engineering pipeline below the inside of a foundation pit, then two adjacent pipeline bodies are spliced, and welding is carried out on the inner walls of the pipeline bodies;
sealing two adjacent concrete pipelines; and
and installing and fixing the supporting component on the inner wall of the pipeline body.
Through adopting above-mentioned technical scheme, through the outside parcel at the pipeline body at concrete pipe, thereby after burying electric power engineering pipeline underground, concrete pipe covers the pipeline body, thereby the erosion of underground water and moisture to the pipeline body has been reduced, and after electric power engineering pipe laying completion, the staff is when carrying out laying of other pipelines, this electric power engineering pipeline is owing to have the protection of concrete pipe to the pipeline body, this electric power engineering is difficult to be broken by digging, thereby fine protection this internal electric wire of pipeline, the emergence of electric leakage accident has been reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the outside parcel at the pipeline body at concrete pipe, thereby after burying electric power engineering pipeline underground, concrete pipe covers the pipeline body, thereby has reduced the erosion of groundwater branch to the pipeline body, and after electric power engineering pipeline laying completion, when the staff is carrying out laying of other pipelines, this electric power engineering pipeline is owing to have concrete pipe to the protection of pipeline body, this electric power engineering is difficult to be broken by digging, has prolonged electric power engineering pipeline's life.
2. When the staff is installing fixedly two electric power engineering pipelines, at first put into the slot with the electric power engineering pipeline, and make the opening on the go-between up, then dock the pipeline body in two electric power engineering pipelines, then carry out welded fastening to the contact jaw of two pipeline bodies from the inside of pipeline body, the staff pours the concrete into through the opening part on two go-between after that, form concrete layer after waiting the concrete setting, the fine junction to two pipeline bodies of concrete layer protects, thereby the erosion of underground water and moisture to two pipeline body junctions has been reduced, the life of electric power engineering pipeline has been prolonged.
3. When the staff carried the electric wire, the staff accessible rotated the threaded rod for the lifter plate rises on the threaded rod, thereby makes the supporting wheel exceed the backup pad, then on the staff placed the supporting wheel with the electric wire, stimulates the electric wire again after that, thereby has reduced staff's intensity of labour, has also reduced the contact of electric wire with the backup pad, has reduced the wearing and tearing to the backup pad to the electric wire.
Drawings
Fig. 1 is a schematic connection structure diagram of two adjacent electric engineering pipelines in the embodiment of the present application.
Fig. 2 is an enlarged schematic view of the front view of fig. 1.
Fig. 3 is a partial structural view of a cross-sectional view taken along a line a-a in fig. 2.
Description of reference numerals: 11. a pipe body; 12. a concrete pipe; 13. fixing the rod; 14. a limiting plate; 15. a connecting rod; 16. a connecting ring; 2. a support assembly; 21. a support frame; 22. a support plate; 23. a threaded rod; 24. a slide bar; 25. a lifting plate; 26. a mounting frame; 27. a support wheel; 28. a flange plate.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses electric power engineering pipeline.
Referring to fig. 1 and 2, the electric power engineering pipeline includes a pipeline body 11 and a concrete pipeline 12 wrapped outside the pipeline body 11, and when the electric power engineering pipeline is manufactured, concrete is poured on the outer wall of the pipeline body 11, and the concrete pipeline is formed after the concrete is solidified.
Referring to fig. 2 and 3, a plurality of fixing rods 13 are uniformly distributed on the outer wall of the pipe body 11, and the fixing rods 13 are installed and fixed along the radial direction of the pipe body 11. A limiting plate 14 is fixedly connected to the fixing rod 13, the limiting plate 14 is located at one end of the fixing rod 13 far away from the pipeline body 11, and the diameter of the limiting plate 14 is larger than that of the fixing rod 13. After the concrete pipeline 12 is poured, the fixing rod 13 is completely embedded in the concrete pipeline 12, the limiting plate 14 is embedded in the concrete pipeline 12, one side, away from the pipeline body 11, of the limiting plate 14 extends out of the concrete pipeline 12, and the side, away from the pipeline body 11, of the limiting plate 14 is a curved surface with the same curvature as that of the concrete pipeline 12.
Further, referring to fig. 1 and 3, a plurality of connecting rods 15 are fixed on outer walls of both ends of the duct body 11, the connecting rods 15 are uniformly distributed along a circumferential direction of the duct body 11, and the connecting rods 15 are installed and fixed along a radial direction of the duct body 11. A connecting ring 16 is fixed on the connecting rods 15, the connecting ring 16 is coaxial with the pipeline body 11, the connecting ring 16 is welded with the connecting rods 15, and openings are arranged on the connecting ring 16. One end of the connecting ring 16 abuts against the concrete pipe 12, one end of the connecting ring 16, which is far away from the concrete pipe 12, is flush with the edge of the pipe body 11, and the outer ring diameter of the connecting ring 16 is the same as that of the concrete pipe 12.
When the installation construction of electric power engineering pipeline, the staff in advance with electric power engineering pipeline below to the ditch inslot, then make two adjacent electric power engineering pipelines carry out the butt, make the opening side of go up ring 16 on every electric power engineering pipeline. Then make pipeline bodies 11 on two electric power engineering pipelines carry out the butt, and make two adjacent go-between 16 on two electric power engineering pipelines carry out the butt simultaneously, then the staff welds the junction of two pipeline bodies 11 in the inside of electric power engineering pipeline, welds two go-between 16 outside two adjacent electric power engineering pipelines simultaneously.
Referring to fig. 1 and 3, after the welding and cooling are completed, the worker pours concrete between the connection ring 16 and the pipeline body 11 through the opening side of the connection ring 16, and forms a concrete layer after the concrete is solidified. The concrete layer covers the welding position of the two adjacent pipeline bodies 11, so that the corrosion of underground water to the connecting position of the electric power engineering pipeline is reduced, and the service life of the electric power engineering pipeline is prolonged.
Further, referring to fig. 1 and 3, in order to better support the electric wires inside the duct body 11, a support assembly 2 is provided inside the duct body 11, and the support assembly 2 includes a support frame 21 fixed on an inner wall of the duct body 11 and a plurality of support plates 22 fixed on the support frame 21. Support frame 21 welds on the inside lateral wall of pipeline body 11, and backup pad 22 is the arc, buries the electric power engineering pipeline underground after, and backup pad 22 sets up upwards, has the clearance between two adjacent backup pads 22 to the staff of being convenient for stimulates the electric wire. The plurality of support plates 22 are uniformly distributed along the axial direction of the duct body 11, and after the installation of the electric wires is completed, the support plates 22 support the electric wires.
Further, referring to fig. 1 and 3, the support assembly 2 further includes a threaded rod 23 rotatably connected to the support frame 21 and a sliding rod 24 fixed to the support frame 21, the threaded rod 23 is arranged along the vertical direction, a threaded section and a smooth section are arranged on the threaded rod 23, the threaded section on the threaded rod 23 is in threaded connection with the lifting plate 25, the smooth section on the threaded rod 23 is rotatably connected to the support frame 21, and the sliding rod 24 is parallel to the threaded rod 23. The threaded rod 23 is further connected with a lifting plate 25 in a threaded mode, the lifting plate 25 is connected with the sliding rod 24 in a sliding mode, the threaded rod 23 is rotated, and the lifting plate 25 slides up and down on the sliding rod 24.
An installation frame 26 is fixed to the upper end of the lifting plate 25, a support wheel 27 is rotatably connected to the installation frame 26, and the support wheel 27 and the support plate 22 are spaced apart from each other inside the duct body 11 along the conveying direction of the support plate 22 in the rotation direction of the support wheel 27. Thus, when the worker conveys the electric wire inside the duct body 11, the worker rotates the threaded rod 23 to raise the lifting plate 25 on the slide rod 24 and raise the top end of the support wheel 27 above the support plate 22, places the electric wire on the upper end of the support wheel 27, and conveys the electric wire inside the duct body 11. After the electric wire is conveyed, the worker can rotate the threaded rod 23 reversely to lower the supporting wheel 27 gradually, and the supporting plate 22 is used for supporting the electric wire.
In order to facilitate the rotation of the threaded rod 23 by the worker, the flange 28 is fixedly connected to the bottom of the threaded rod 23, the worker can be connected to the flange 28 by using some power devices, then the flange 28 is driven to rotate by using the power devices, and the threaded rod 23 is driven to rotate, so that the labor intensity of the worker in the process of rotating the threaded rod 23 is reduced.
The embodiment of the application also discloses a construction method of the electric power engineering pipeline.
The construction method of the electric power engineering pipeline comprises the following steps:
s100, lowering the power engineering pipeline;
putting the prefabricated electric power engineering pipelines into communication, and then mutually abutting two adjacent electric power engineering pipelines
S200, fixing two adjacent electric power engineering pipelines;
the joints of the two adjacent pipeline bodies 11 are welded and fixed from the inside of the electric power engineering pipeline, and the joints of the two adjacent connecting rings 16 are welded and fixed from the outside of the electric power engineering pipeline.
S300, pouring a concrete layer;
after two adjacent pipeline bodies 11 and two adjacent connecting rings 16 are welded, after the welding position is cooled, concrete is poured into a space between the connecting rings 16 and the pipeline bodies 11 from the opening of the connecting rings 16, a concrete layer is formed after the concrete is solidified, and the concrete layer is used for well connecting two adjacent electric power engineering pipelines.
And sequentially lowering, installing and fixing the subsequent electric power engineering pipelines.
S400, mounting, fixing and supporting component 2
Welding and fixing a support frame 21 on the inner wall of the pipeline body 11, and then welding and fixing a support plate 22 on the support frame 21;
the threaded rod 23 is rotatably connected and installed on the support frame 21, and then the sliding rod 24 is welded and fixed on the support frame 21;
mounting the supporting wheels 27 on the mounting frame 26, then welding and fixing the mounting frame 26 on the lifting plate 25, and then mounting the lifting plate 25 on the threaded rod 23 and the sliding rod 24;
finally, the electric wires are transported on the support assembly 2.
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.
Claims (10)
1. Electric power engineering pipeline, its characterized in that: comprises that
A pipe body (11);
the concrete pipeline (12) is wrapped outside the pipeline body (11);
a plurality of fixing rods (13) fixed on the outer wall of the pipeline body (11) and embedded in the concrete pipeline (12); and
the limiting plate (14) is fixed on the fixing rod (13) and embedded into the concrete pipeline (12);
the fixing rods (13) are arranged along the radial direction of the pipeline body (11), the diameter of the limiting plate (14) is larger than that of the fixing rods (13), and the limiting plate (14) is exposed out of the concrete pipeline (12).
2. The electrical engineering pipe of claim 1, wherein: the concrete pipeline is characterized in that the two ends of the pipeline bodies (11) extend out of the two ends of the concrete pipeline (12), a plurality of connecting rods (15) are fixed on the outer wall of the pipeline bodies (11), connecting rings (16) are fixed on the connecting rods (15), the connecting rings (16) on the two adjacent pipeline bodies (11) are fixedly connected, openings are formed in the connecting rings (16), and concrete layers are poured between the connecting rings (16) and the pipeline bodies (11).
3. The electrical engineering pipe of claim 2, wherein: the opening on the connecting ring (16) is arranged upwards.
4. The electrical engineering pipe of claim 2, wherein: the connecting rod (15) is arranged along the radial direction of the pipeline body (11).
5. The electrical engineering pipe of claim 1, wherein: the inner wall of the pipeline body (11) is provided with a supporting component (2) for supporting the electric wire;
the supporting component (2) comprises a supporting frame (21) fixed on the inner wall of the pipeline body (11) and a plurality of supporting plates (22) fixed on the supporting frame (21).
6. The electrical engineering pipe of claim 5, wherein: the supporting plate (22) is an arc-shaped plate.
7. The electrical engineering pipe of claim 5, wherein: the supporting component (2) further comprises a threaded rod (23) rotatably connected to the supporting frame (21), a sliding rod (24) fixed on the supporting frame (21), a lifting plate (25) in threaded connection with the threaded rod (23), an installation frame (26) arranged on the lifting plate (25) and a supporting wheel (27) rotatably connected with the installation frame (26);
the supporting wheels (27) rotate along the conveying direction of the electric wire, the supporting wheels (27) are located between two adjacent supporting plates (22), and the supporting wheels (27) are used for supporting and conveying the electric wire.
8. The electrical engineering pipe of claim 7, wherein: the supporting wheels (27) and the supporting plate (22) are distributed at intervals.
9. The electrical engineering pipe of claim 7, wherein: and a flange plate (28) is fixed at the bottom of the threaded rod (23), and the flange plate (28) is used for connecting a power device.
10. The construction method of the electric power engineering pipeline is characterized by comprising the following steps:
pouring concrete outside the pipeline body (11) in advance to form a concrete pipeline (12);
the method comprises the following steps that (1) an electric engineering pipeline is arranged towards the inner lower part of a foundation pit, then two adjacent pipeline bodies (11) are spliced, and welding is carried out on the inner walls of the pipeline bodies (11);
sealing two adjacent concrete pipelines (12); and
the support component (2) is installed and fixed on the inner wall of the pipeline body (11).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011471291.4A CN112467673A (en) | 2020-12-14 | 2020-12-14 | Electric power engineering pipeline and construction method thereof |
| CN2020114712914 | 2020-12-14 | ||
| CN202110200821X | 2021-02-23 | ||
| CN202110200821 | 2021-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113224723A true CN113224723A (en) | 2021-08-06 |
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ID=77080566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110674060.1A Pending CN113224723A (en) | 2020-12-14 | 2021-06-17 | Electric power engineering pipeline and construction method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN113224723A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6302379B1 (en) * | 2000-05-11 | 2001-10-16 | Paul A. Walters | Device for facilitating threading of electrical cable through a pipe |
| CN202721425U (en) * | 2012-06-05 | 2013-02-06 | 浙江省电力公司紧水滩水力发电厂 | Portable fast lifting cable paying off rack |
| CN209358218U (en) * | 2018-07-17 | 2019-09-06 | 湖北工业大学 | A kind of line protective devices |
| CN110541433A (en) * | 2019-10-09 | 2019-12-06 | 沈阳建筑大学 | Assembled underground pipe gallery |
| CN110541432A (en) * | 2019-10-09 | 2019-12-06 | 沈阳建筑大学 | Slip casting formula utility tunnel of prefabricated round shell |
| CN211769356U (en) * | 2019-11-27 | 2020-10-27 | 新疆锦农工程建设有限公司 | Speed-adjustable water conservancy construction pipe laying pay-off device |
-
2021
- 2021-06-17 CN CN202110674060.1A patent/CN113224723A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6302379B1 (en) * | 2000-05-11 | 2001-10-16 | Paul A. Walters | Device for facilitating threading of electrical cable through a pipe |
| CN202721425U (en) * | 2012-06-05 | 2013-02-06 | 浙江省电力公司紧水滩水力发电厂 | Portable fast lifting cable paying off rack |
| CN209358218U (en) * | 2018-07-17 | 2019-09-06 | 湖北工业大学 | A kind of line protective devices |
| CN110541433A (en) * | 2019-10-09 | 2019-12-06 | 沈阳建筑大学 | Assembled underground pipe gallery |
| CN110541432A (en) * | 2019-10-09 | 2019-12-06 | 沈阳建筑大学 | Slip casting formula utility tunnel of prefabricated round shell |
| CN211769356U (en) * | 2019-11-27 | 2020-10-27 | 新疆锦农工程建设有限公司 | Speed-adjustable water conservancy construction pipe laying pay-off device |
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Application publication date: 20210806 |