CN110970855A - Indoor dehumidifying and ventilating cable trench cover plate - Google Patents
Indoor dehumidifying and ventilating cable trench cover plate Download PDFInfo
- Publication number
- CN110970855A CN110970855A CN201911237207.XA CN201911237207A CN110970855A CN 110970855 A CN110970855 A CN 110970855A CN 201911237207 A CN201911237207 A CN 201911237207A CN 110970855 A CN110970855 A CN 110970855A
- Authority
- CN
- China
- Prior art keywords
- cover plate
- cable trench
- supporting column
- groove
- lifting cylinder
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- 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.)
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Classifications
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- 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
- H02G9/02—Installations of electric cables or lines in or on the ground or water laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tile
-
- 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
- H02G9/02—Installations of electric cables or lines in or on the ground or water laid directly in or on the ground, river-bed or sea-bottom; Coverings therefor, e.g. tile
- H02G9/025—Coverings therefor, e.g. tile
Abstract
The cover plate comprises a cover plate body (1), wherein ventilation parts (1-1) provided with ventilation holes (1-1-1) are arranged on two sides of the cover plate body (1), lower plates (2) are correspondingly arranged below the two ventilation parts (1-1), the outer ends of the ventilation parts (1-1) and the outer ends of the lower plates (2) are fixedly connected through vertical plates (3), a space for air flow to flow is formed between the ventilation parts (1-1) and the lower plates (2), dust baffles (2-1) are arranged at the inner ends of the lower plates (2), a transverse channel (A) for air flow to pass through is formed between the upper ends of the dust baffles (2-1) and the bottom surface of the cover plate body (1), and the dust baffles (2-1) are positioned below the cover plate body (1); it not only can solve in the cable pit moisture, the problem such as frost, dewfall, more importantly can prevent that equipment from converging in accuse cabinet and the mechanism case, frost, dewfall problem. The normal, safe and stable operation of the equipment is ensured, and the equipment and power grid accidents caused by the problems of frost condensation and dew condensation can be avoided.
Description
Technical Field
The invention provides an indoor dehumidifying and ventilating cable trench cover plate.
Background
Because the phenomena of frost, dew formation, water accumulation and the like in the cable trench and the phenomenon of water vapor volatilization along with the change of temperature are easy to occur, water vapor can enter a control cubicle and an equipment mechanism box on an equipment site along a cable channel, and the phenomena of condensation and frost formation in the control cubicle and the equipment mechanism box are caused along with the water vapor, the phenomena of water dripping and water dripping are formed by serious people, a light person causes a terminal row and the corrosion of an equipment original element, the overhaul period of the equipment is shortened, the service life of the equipment is shortened, and the serious people can cause equipment tripping or equipment refusing to cause serious equipment accidents and power grid accidents. Therefore, the indoor cable duct ventilation problem becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention content is as follows:
the invention provides an indoor dehumidifying and ventilating cable trench cover plate, and aims to solve the ventilating problem in a cable trench.
The technical scheme is as follows:
indoor hydrofuge cable trench cover of taking a breath, its characterized in that: the cover plate comprises a cover plate body (1), wherein ventilation parts (1-1) provided with ventilation holes (1-1-1) are arranged on two sides of the cover plate body (1), lower plates (2) are respectively and correspondingly arranged below the two ventilation parts (1-1), the outer ends of the ventilation parts (1-1) are fixedly connected with the outer ends of the lower plates (2) through vertical plates (3), a space for air flow to flow is formed between the ventilation parts (1-1) and the lower plates (2), dust baffles (2-1) are arranged at the inner ends of the lower plates (2), a transverse channel (A) for air flow to pass through is formed between the upper ends of the dust baffles (2-1) and the bottom surface of the cover plate body (1), and the dust baffles (2-1) are positioned below the cover plate body (1);
a vertical airflow channel (B) is formed between the two dust baffles (2-1).
The vent holes (1-1-1) are square holes or circular holes.
The cover plate body (1) is provided with a groove (4), a movable cover plate is arranged in the groove (4),
the movable cover plate is a structure which can move up and down relative to the groove (4);
the movable cover plate comprises a cover plate shell (5) and two telescopic cover plates (6), the two telescopic cover plates (6) are of a structure capable of being retracted into the cover plate shell (5) and pulled out of the cover plate shell (5), and when the movable cover plate moves upwards to a position where the telescopic cover plates (6) can be pulled out, the pulled-out telescopic cover plates (6) can cover the air vents (1-1-1).
A circular through hole (1-3) is formed in the center of the cover plate shell (5), and gaps (1-3-1) are formed at two ends of the circular through hole (1-3);
the side wall of the groove (4) is provided with a boss (4-1), the cover plate shell (5) falls on the boss (4-1) when hidden in the groove (4), and the upper surface of the cover plate shell (5) is flush with the upper surface of the cover plate body (1) when the cover plate shell (5) is hidden in the groove (4);
when the cover plate shell (5) falls on the boss (4-1), a gap (C) is reserved between the bottom surface of the cover plate shell (5) and the bottom surface of the groove (4).
The cover plate also comprises a lifting tool which is matched with the circular through hole (1-3) for lifting and lowering the cover plate shell (5);
the lifting tool comprises a supporting column (7) and a lifting cylinder (8) which is sleeved outside the supporting column (7) and can move up and down along the supporting column (7), the lifting cylinder (8) is of a structure which can only move up and down along the supporting column (7) and cannot rotate, external threads are arranged on the upper portion of the supporting column (7), a screwing nut (9) in threaded fit with the supporting column (7) is arranged on the upper portion of the supporting column (7), the lower end of the screwing nut (9) is connected with the upper end of the lifting cylinder (8), and the lifting cylinder (8) is driven to move up and down along the supporting column (7) through rotation of the screwing nut (9);
the bottom of the lifting cylinder (8) is a disc (8-1) which can extend into the circular through hole (1-3), and the two ends of the disc (8-1) are provided with lugs (8-2) which can penetrate through the gaps (1-3-1).
The inner wall of the lifting cylinder (8) is provided with a vertical sliding chute (8-3), and the outer wall of the supporting column (7) is provided with a limit key (7-1) extending into the vertical sliding chute (8-3).
The bottom of the screwing nut (9) is provided with an annular outer protrusion (9-1), the inner wall of the upper part of the lifting cylinder (8) is provided with an annular groove (8-5), and the annular outer protrusion (9-1) extends into the annular groove (8-5), so that the screwing nut (9) forms a structure capable of rotating relative to the lifting cylinder (8).
The outer wall of the screwing nut (9) is provided with a screwing disc (10).
The outer end of the telescopic cover plate (6) is provided with a ring (6-1) which is convenient for pulling out the telescopic cover plate (6).
The bottom of the vent hole (1-1-1) is provided with a protective metal net.
The advantages and effects are as follows:
the dust-proof cover plate comprises a cover plate body, wherein ventilation parts provided with ventilation holes are arranged on two sides of the cover plate body, lower plates are correspondingly arranged below the two ventilation parts, the outer ends of the ventilation parts are fixedly connected with the outer ends of the lower plates through vertical plates, a space for air flow to flow is formed between the ventilation parts and the lower plates, dust-proof plates are arranged at the inner ends of the lower plates, a transverse channel for air flow to pass through is formed between the upper ends of the dust-proof plates and the bottom surface of the cover plate body, and the dust-proof plates are positioned below the cover plate body;
a vertical airflow channel is formed between the two dust baffles.
This novel indoor cable trench cover of design adopts the steel frame, and stainless steel surface design, top layer both sides (the both sides of cover plate body) design are the blow vent, and lower floor's design is the scavenge port placed in the middle, and blow vent dislocation design has tiny foreign matter directly to fall to the cable pit in order to prevent that the top layer, sets up dust guard at lower floor's blow vent border simultaneously, blocks in the foreign matter gets into the cable pit, influences cable tunnel operation safety. In addition, the bottom of the vent hole is designed by adopting a mesh metal net, so that the function of preventing small animals (mainly mice) is effectively ensured, and the internal cable is prevented from being damaged while the internal and external ventilation effect of the cable duct is ensured.
In addition, the telescopic cover plate is adopted to cover or open the vent holes so as to facilitate selective ventilation, when the telescopic cover plate is required to be completely covered, the telescopic cover plate is selected to cover the vent holes, and when partial or whole ventilation is required, the vent holes at corresponding positions are opened.
The on-site application of the project can solve the problems of moisture, frost condensation, condensation and the like in the cable trench, and more importantly can prevent the problems of frost condensation and condensation in the equipment control cabinet and the mechanism box. The normal, safe and stable operation of the equipment is ensured, and the equipment and power grid accidents caused by the problems of frost condensation and dew condensation can be avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention (the retractable cover plate is pulled out);
FIG. 2 is a top view of the present invention (with retractable cover retracted);
FIG. 3 is a schematic view of a usage state of the present invention (the state when the retractable cover plate is retracted);
FIG. 4 is a schematic view of a lifting tool;
fig. 5 is a schematic view of a disc of the pulling cylinder.
Detailed Description
The cover plate comprises a cover plate body (1), wherein ventilation parts (1-1) provided with ventilation holes (1-1-1) are arranged on two sides of the cover plate body (1), lower plates (2) are correspondingly arranged below the two ventilation parts (1-1), the outer ends of the ventilation parts (1-1) and the outer ends of the lower plates (2) are fixedly connected through vertical plates (3), a space for air flow to flow is formed between the ventilation parts (1-1) and the lower plates (2), dust baffles (2-1) are arranged at the inner ends of the lower plates (2), a transverse channel (A) for air flow to pass through is formed between the upper ends of the dust baffles (2-1) and the bottom surface of the cover plate body (1), and the dust baffles (2-1) are positioned below the cover plate body (1) (not under the ventilation holes (1-1-1), staggered with the vent hole (1-1-1);
a vertical airflow channel (B) is formed between the two dust baffles (2-1).
The vent holes (1-1-1) are square holes or circular holes.
The cover plate body (1) is provided with a groove (4), a movable cover plate is arranged in the groove (4),
the movable cover plate is a structure which can move up and down relative to the groove (4) (the movable cover plate can move up and down as shown in figure 1);
the movable cover plate comprises a cover plate shell (5) and two telescopic cover plates (6), wherein the two telescopic cover plates (6) are structures (incompletely pulled out) capable of being retracted into the cover plate shell (5) and pulled out of the cover plate shell (5), when the outer ends of the telescopic cover plates (6), namely the left end and the right end shown in figure 1, are aligned with the outer end of the ventilation part (1-1), the inner ends of the telescopic cover plates (6) are still remained in the cover plate shell (5), and when the movable cover plates move upwards to the position (namely the position shown in figure 1) capable of being pulled out of the telescopic cover plates (6), the pulled-out telescopic cover plates (6) can cover the ventilation holes (1-1-1) (the telescopic cover plates (6) are inserted into the cover plate shell (5) from the left end and the right end shown in figure 1 and can be pulled out in use).
A circular through hole (1-3) is formed in the center of the cover plate shell (5) (the circular through hole (1-3) penetrates through the upper wall and the lower wall of the cover plate shell (5)), and gaps (1-3-1) are formed in two ends of the circular through hole (1-3);
the side wall of the groove (4) is provided with a boss (4-1), the cover plate shell (5) falls on the boss (4-1) when hidden in the groove (4), and the upper surface of the cover plate shell (5) is flush with the upper surface of the cover plate body (1) when the cover plate shell (5) is hidden in the groove (4);
when the cover plate shell (5) falls on the boss (4-1), a gap (C) is reserved between the bottom surface of the cover plate shell (5) and the bottom surface of the groove (4).
The cover plate also comprises a lifting tool which is matched with the circular through hole (1-3) for lifting and lowering the cover plate shell (5);
the lifting tool comprises a supporting column (7) and a lifting cylinder (8) which is sleeved outside the supporting column (7) and can move up and down along the supporting column (7), the lifting cylinder (8) is of a structure which can only move up and down along the supporting column (7) and cannot rotate, external threads are arranged on the upper portion of the supporting column (7), a screwing nut (9) in threaded fit with the supporting column (7) is arranged on the upper portion of the supporting column (7), the lower end of the screwing nut (9) is connected with the upper end of the lifting cylinder (8), and the lifting cylinder (8) is driven to move up and down along the supporting column (7) through rotation of the screwing nut (9);
the bottom of the lifting cylinder (8) is a disc (8-1) which can extend into the circular through hole (1-3), and the two ends of the disc (8-1) are provided with lugs (8-2) which can penetrate through the gaps (1-3-1). (that is to say, when the disc (8-1) and the lug (8-2) are used, the circular through hole (1-3) and the notch (1-3-1) can penetrate through the through hole formed by the circular through hole) and the diameter of the lifting cylinder (8) meets the requirement that the circular through hole (1-3) can penetrate through the circular through hole, and the diameter of the disc (8-1) is larger than that of the lifting cylinder (8).
The inner wall of the lifting cylinder (8) is provided with a vertical sliding groove (8-3), the outer wall of the supporting column (7) is provided with a limit key (7-1) extending into the vertical sliding groove (8-3) (the lifting cylinder (8) is limited to move up and down only along the supporting column (7) through the matching of the limit key (7-1) and the vertical sliding groove (8-3).
The bottom of the screwing nut (9) is provided with an annular outer protrusion (9-1), the inner wall of the upper part of the lifting cylinder (8) is provided with an annular groove (8-5), and the annular outer protrusion (9-1) extends into the annular groove (8-5), so that the screwing nut (9) forms a structure capable of rotating relative to the lifting cylinder (8), namely the screwing nut (9) rotates, and the lifting cylinder (8) does not rotate.
The outer wall of the screwing nut (9) is provided with a screwing disc (10) (which is convenient to screw).
The outer end of the telescopic cover plate (6) is provided with a ring (6-1) which is convenient for pulling out the telescopic cover plate (6).
The bottom of the vent hole (1-1-1) is provided with a protective metal net.
When the invention is used, as shown in figure 3, the cable duct D is covered, the arrow shown in the figure is the path of gas circulation, when the vent hole (1-1-1) needs to be covered, a lifting tool is inserted into the circular through hole (1-3) to the position shown in figure 4, the disc (8-1) is positioned in the gap (C), then the lifting tool is integrally rotated to enable the lug (8-2) to be positioned at the bottom of the cover plate shell (5), then the screw nut (9) is screwed, as the lifting cylinder (8) is driven by the screw nut (9) to move upwards, the lug (8-2) supports the bottom of the cover plate shell (5), the cover plate shell (5) moves upwards until the position where the telescopic cover plate (6) can be pulled out as shown in figure 1, then one hand holds the support column (7), and the other hand pulls out the telescopic cover plate (6), the air vent structure is firstly lapped on the upper edge of the groove (4) (at the moment, the bottom of the cover plate shell (5) is not completely separated from the groove (4), so that the cover plate shell (5) cannot fall down or incline even if the supporting columns (7) are loosened at the moment), then the telescopic cover plate (6) is sequentially pulled to cover the air vent (1-1-1), or when the cover plate shell (5) is moved upwards to the position where the telescopic cover plate (6) can be pulled out as shown in figure 1, another worker pulls out the telescopic cover plate (6) to directly cover the air vent (1-1-1).
And then reversely screwing and screwing the nut (9) to enable the lifting cylinder (8) to move downwards, enabling the lug (8-2) to leave the bottom of the cover plate shell (5), then integrally rotating the lifting tool to enable the lug (8-2) to be aligned with the notch (1-3-1), and taking out the lifting tool.
When partial cover plate is opened by ventilation, the lifting tool is inserted into the circular through hole (1-3) and rotated to enable the disc (8-1) to be positioned in the gap (C), then the lifting tool is integrally rotated to enable the lug (8-2) to be positioned at the bottom of the cover plate shell (5), then the screwing nut (9) is screwed, the lifting cylinder (8) is slightly moved upwards along with the driving of the screwing nut (9), the lug (8-2) supports the bottom of the cover plate shell (5) to enable the cover plate shell (5) to slightly move upwards, then the telescopic cover plate (6) is pushed back into the cover plate shell (5), then the screwing nut (9) is reversely screwed, the lug (8-2) supports the bottom of the cover plate shell (5) along with the driving of the screwing nut (9) to move downwards, so that the cover plate shell (5) also moves downwards, and (3) continuing to screw the screwing nut (9) until the cover plate shell (5) completely falls onto the boss (4-1) in the groove (4) to enable the lug (8-2) to leave the bottom of the cover plate shell (5), then integrally rotating the lifting tool to enable the lug (8-2) to be aligned with the notch (1-3-1), and taking out the lifting tool.
Claims (10)
1. Indoor hydrofuge cable trench cover of taking a breath, its characterized in that: the cover plate comprises a cover plate body (1), wherein ventilation parts (1-1) provided with ventilation holes (1-1-1) are arranged on two sides of the cover plate body (1), lower plates (2) are respectively and correspondingly arranged below the two ventilation parts (1-1), the outer ends of the ventilation parts (1-1) are fixedly connected with the outer ends of the lower plates (2) through vertical plates (3), a space for air flow to flow is formed between the ventilation parts (1-1) and the lower plates (2), dust baffles (2-1) are arranged at the inner ends of the lower plates (2), a transverse channel (A) for air flow to pass through is formed between the upper ends of the dust baffles (2-1) and the bottom surface of the cover plate body (1), and the dust baffles (2-1) are positioned below the cover plate body (1);
a vertical airflow channel (B) is formed between the two dust baffles (2-1).
2. The indoor dehumidifying ventilation cable trench cover plate of claim 1, wherein: the vent holes (1-1-1) are square holes or circular holes.
3. The indoor dehumidifying ventilation cable trench cover plate of claim 1, wherein:
the cover plate body (1) is provided with a groove (4), a movable cover plate is arranged in the groove (4),
the movable cover plate is a structure which can move up and down relative to the groove (4);
the movable cover plate comprises a cover plate shell (5) and two telescopic cover plates (6), the two telescopic cover plates (6) are of a structure capable of being retracted into the cover plate shell (5) and pulled out of the cover plate shell (5), and when the movable cover plate moves upwards to a position where the telescopic cover plates (6) can be pulled out, the pulled-out telescopic cover plates (6) can cover the air vents (1-1-1).
4. The indoor dehumidifying ventilation cable trench cover plate of claim 3, wherein: a circular through hole (1-3) is formed in the center of the cover plate shell (5), and gaps (1-3-1) are formed at two ends of the circular through hole (1-3);
the side wall of the groove (4) is provided with a boss (4-1), the cover plate shell (5) falls on the boss (4-1) when hidden in the groove (4), and the upper surface of the cover plate shell (5) is flush with the upper surface of the cover plate body (1) when the cover plate shell (5) is hidden in the groove (4);
when the cover plate shell (5) falls on the boss (4-1), a gap (C) is reserved between the bottom surface of the cover plate shell (5) and the bottom surface of the groove (4).
5. The indoor dehumidifying ventilation cable trench cover plate of claim 4, wherein: the cover plate also comprises a lifting tool which is matched with the circular through hole (1-3) for lifting and lowering the cover plate shell (5);
the lifting tool comprises a supporting column (7) and a lifting cylinder (8) which is sleeved outside the supporting column (7) and can move up and down along the supporting column (7), the lifting cylinder (8) is of a structure which can only move up and down along the supporting column (7) and cannot rotate, external threads are arranged on the upper portion of the supporting column (7), a screwing nut (9) in threaded fit with the supporting column (7) is arranged on the upper portion of the supporting column (7), the lower end of the screwing nut (9) is connected with the upper end of the lifting cylinder (8), and the lifting cylinder (8) is driven to move up and down along the supporting column (7) through rotation of the screwing nut (9);
the bottom of the lifting cylinder (8) is a disc (8-1) which can extend into the circular through hole (1-3), and the two ends of the disc (8-1) are provided with lugs (8-2) which can penetrate through the gaps (1-3-1).
6. The indoor dehumidifying ventilation cable trench cover plate of claim 5, wherein: the inner wall of the lifting cylinder (8) is provided with a vertical sliding chute (8-3), and the outer wall of the supporting column (7) is provided with a limit key (7-1) extending into the vertical sliding chute (8-3).
7. The indoor dehumidifying ventilation cable trench cover plate of claim 5, wherein: the bottom of the screwing nut (9) is provided with an annular outer protrusion (9-1), the inner wall of the upper part of the lifting cylinder (8) is provided with an annular groove (8-5), and the annular outer protrusion (9-1) extends into the annular groove (8-5), so that the screwing nut (9) forms a structure capable of rotating relative to the lifting cylinder (8).
8. The indoor dehumidifying ventilation cable trench cover plate of claim 5, wherein: the outer wall of the screwing nut (9) is provided with a screwing disc (10).
9. The indoor dehumidifying ventilation cable trench cover plate of claim 5, wherein: the outer end of the telescopic cover plate (6) is provided with a ring (6-1) which is convenient for pulling out the telescopic cover plate (6).
10. The indoor dehumidifying ventilation cable trench cover plate of claim 5, wherein: the bottom of the vent hole (1-1-1) is provided with a protective metal net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911237207.XA CN110970855B (en) | 2019-12-05 | 2019-12-05 | Indoor dehumidifying and ventilating cable trench cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911237207.XA CN110970855B (en) | 2019-12-05 | 2019-12-05 | Indoor dehumidifying and ventilating cable trench cover plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110970855A true CN110970855A (en) | 2020-04-07 |
| CN110970855B CN110970855B (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911237207.XA Active CN110970855B (en) | 2019-12-05 | 2019-12-05 | Indoor dehumidifying and ventilating cable trench cover plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110970855B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050000175A1 (en) * | 2003-07-01 | 2005-01-06 | Machledt Charles G. | Flush to grade utilities vault |
| CN204947543U (en) * | 2015-10-08 | 2016-01-06 | 国网山东省电力公司泰安供电公司 | A kind of self-ventilation cable trench cover structure |
| CN206060142U (en) * | 2016-08-29 | 2017-03-29 | 国网河南鄢陵县供电公司 | Transformer station is automatically drained out formula cable channel cover plate with moisture is easily raised |
| CN207339211U (en) * | 2017-11-14 | 2018-05-08 | 贵州电网有限责任公司 | A kind of novel energy-saving environment-friendly cable duct gravity-flow ventilation dehumidification system |
| CN209169910U (en) * | 2018-10-25 | 2019-07-26 | 江西徳得建设工程有限公司 | A kind of high-speed rail cable channel cover plate of steel construction frame concrete |
-
2019
- 2019-12-05 CN CN201911237207.XA patent/CN110970855B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050000175A1 (en) * | 2003-07-01 | 2005-01-06 | Machledt Charles G. | Flush to grade utilities vault |
| CN204947543U (en) * | 2015-10-08 | 2016-01-06 | 国网山东省电力公司泰安供电公司 | A kind of self-ventilation cable trench cover structure |
| CN206060142U (en) * | 2016-08-29 | 2017-03-29 | 国网河南鄢陵县供电公司 | Transformer station is automatically drained out formula cable channel cover plate with moisture is easily raised |
| CN207339211U (en) * | 2017-11-14 | 2018-05-08 | 贵州电网有限责任公司 | A kind of novel energy-saving environment-friendly cable duct gravity-flow ventilation dehumidification system |
| CN209169910U (en) * | 2018-10-25 | 2019-07-26 | 江西徳得建设工程有限公司 | A kind of high-speed rail cable channel cover plate of steel construction frame concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110970855B (en) | 2023-03-28 |
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