CN109343184A - A kind of cable junction box - Google Patents
A kind of cable junction box Download PDFInfo
- Publication number
- CN109343184A CN109343184A CN201811245406.0A CN201811245406A CN109343184A CN 109343184 A CN109343184 A CN 109343184A CN 201811245406 A CN201811245406 A CN 201811245406A CN 109343184 A CN109343184 A CN 109343184A
- Authority
- CN
- China
- Prior art keywords
- pedestal
- disc
- top bottom
- junction box
- cable junction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4441—Boxes
- G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Cable Accessories (AREA)
Abstract
The present invention provides a kind of cable junction box, which includes: housing, fiber management tray and pedestal；Wherein, housing covers on pedestal, to form seal cavity；Fiber management tray is set in seal cavity, the welding tail optical fiber for the fixed optical fiber that spirals；Top bottom-disc is equipped in seal cavity between pedestal and fiber management tray, top bottom-disc and pedestal interval are arranged, to form water area in seal cavity between top bottom-disc and pedestal, for that will infiltrate into the intracorporal water of seal chamber from pedestal or ice is partitioned in water area.The present invention passes through in the seal cavity formed between housing and pedestal and top bottom-disc is arranged between pedestal and fiber management tray, water area is formed between top bottom-disc and pedestal, the ice generated under water or low temperature to be partitioned in water area, it avoids water and ice from infiltrating into the winding displacement plate cabin above top bottom-disc, avoids ponding or freeze causing damage metal component in i.e. seal cavity to fiber management tray and occurring corroding or the phenomenon that icing ion electrolysis water causes hydrogen damage to fiber management tray inner fiber.
Description
Technical field
The present invention relates to Power Line Communication transmission technique fields, in particular to a kind of cable junction box.
Background technique
Transmission line of electricity optical cable OPGW(Optical Fiber Composite Overhead Ground for a long time, it is fine
Composite overhead ground wire), since it serves not only as ground wire application, mainly undertake communication of power system core business.Due to OPGW
Cable splice closure is installed on transmission tower, is mostly field, river, on mountain etc. in adverse circumstances, and in route product design,
Connector box often requires that service life is not less than 25 years, therefore high to sealing requirements.
Growth trend is presented in OPGW cable splice closure Cable's Fault in recent years.Cable splice closure failure directly affects optical channel
Signal decaying increases, and causes the bit error rate of transformer substation communication transmission device to increase, causes communication service to be interrupted when serious, gives electric power
Communication network safety and stability brings great risk.Actual track operation/maintenance data shows following problems often occur in cable splice closure:
Connector box sealing difference causes easy ponding in connector box, and metal component corrodes in box, and icing ion electrolysis water is to fiber management tray
Inner fiber causes hydrogen damage.
Summary of the invention
In consideration of it, the invention proposes a kind of cable junction box, it is intended to solve the problems, such as that existing cable splice closure sealing is poor.
The invention proposes a kind of cable junction box, which includes: housing, fiber management tray and pedestal；Wherein, institute
It states housing to cover on the pedestal, to form seal cavity；The fiber management tray is set in the seal cavity, for spiraling
The welding tail optical fiber of the fixed optical fiber；Top bottom-disc, institute are equipped in the seal cavity between the pedestal and the fiber management tray
It states top bottom-disc and the pedestal interval is arranged, to form water between top bottom-disc described in the seal cavity and the pedestal
Area, for the intracorporal water of the seal chamber will to be infiltrated into from the pedestal or ice is partitioned in the water area.
Further, above-mentioned cable junction box, the top bottom-disc are provided with sealing structure along its circumferential direction, described for sealing
Water area.
Further, above-mentioned cable junction box, the sealing structure include: chassis sealing ring and elastic ring；Wherein, described
Elastic ring and the chassis sealing ring are disposed in parallel between the top bottom-disc and the housing along the top bottom-disc thickness direction,
Also, the elasticity loop section is arranged in the groove that the top bottom-disc circumferentially opens up.
Further, above-mentioned cable junction box, the groove are arranged along the top bottom-disc outer wall circumferential direction complete cycle.
Further, above-mentioned cable junction box offers several light units on the top bottom-disc and enters hole, for installing
State the optical unit tubes of optical fiber.
Further, above-mentioned cable junction box, the light unit, which enters, is provided with rubber cone in hole, is provided with outside conical section
Sealing nut, for sealing the gap between the optical unit tubes and the rubber cone.
Further, above-mentioned cable junction box is connected between the top bottom-disc and the pedestal by the first bindiny mechanism
It connects.
Further, above-mentioned cable junction box is provided with pedestal sealing ring between the pedestal and the housing, for close
Seal the seal cavity.
Further, above-mentioned cable junction box is connected between the housing and the pedestal by the second bindiny mechanism.
Further, above-mentioned cable junction box, second bindiny mechanism include: the connection along housing outer wall setting
Band and the connector for being set to the connecting band end；Wherein, the connecting band is connected with the pedestal by the connector
It connects.
Cable junction box provided by the invention, by fine in pedestal and disk in the seal cavity that is formed between housing and pedestal
Top bottom-disc is set between box, to form water area between top bottom-disc and pedestal, it is intracorporal seal chamber will to be infiltrated into from pedestal
The ice generated under water or low temperature is partitioned in water area, and then avoids being penetrated and be pierced by due to optical cable that two holes are poorly sealed brings
Vapor and condensation penetrate into the drawback in connector box, it is ensured that the optical fiber of fiber management tray is not influenced by ponding or ice, that is, is avoided
Water and ice in water area infiltrate into the winding displacement plate cabin above top bottom-disc, so that ponding or icing be avoided to bring brokenly to fiber management tray
Bad is the phenomenon that corroding occurs in metal component in seal cavity or icing ion electrolysis water causes hydrogen damage to fiber management tray inner fiber.
Further, the circumferential setting sealing structure of top bottom-disc, to seal water area, and then further increases the leakproofness in water area,
It is penetrated into winding displacement plate cabin to further avoid water or the ice in water area.
Especially, sealing structure provided in this embodiment is improved close between top bottom-disc and housing by chassis sealing ring
Feng Xing；By the elastic ring being partially arranged in groove, increase the frictional strength of sealing structure and housing, to further increase this
The intensity and leakproofness of cable splice closure.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the first structure diagram of cable junction box provided in an embodiment of the present invention；
Fig. 2 is the second structural schematic diagram of cable junction box provided in an embodiment of the present invention；
Fig. 3 is the main view of cable junction box provided in an embodiment of the present invention；
Fig. 4 is the side view of cable junction box provided in an embodiment of the present invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.It should be noted that in the absence of conflict, embodiment in the present invention and
Feature in embodiment can be combined with each other.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Referring to Fig. 1 to Fig. 4, it illustrates the structural schematic diagrams of cable junction box provided in an embodiment of the present invention.As schemed
Show, which includes: housing 1, fiber management tray 2 and pedestal 3；Wherein, housing 1 covers on pedestal 3, to form seal chamber
Body.Specifically, housing 1 is aluminum housing, is located at the top of pedestal 3.It is steady for ensure to connect between housing 1 and pedestal 3
It is qualitative, it is preferable that be connected between housing 1 and pedestal 3 by the second bindiny mechanism 4, to further ensure that between the two
Connective stability, and then ensure the leakproofness of seal cavity.For the leakproofness for further increasing seal cavity, it is preferable that pedestal 3
Pedestal sealing ring 7 is provided between housing 1, for sealing seal cavity, to avoid external ponding from penetrating into seal cavity.
Wherein, pedestal sealing ring 7 is silicon rubber loop.Light unit perforating 31 is provided on pedestal 3, for installing the light unit of optical fiber
Pipe, so that optical unit tubes are worn from light unit perforating 31 to seal cavity.
With continued reference to Fig. 1 to Fig. 4, fiber management tray 2 is set in seal cavity, the welding tail optical fiber for the fixed optical fiber that spirals.
Specifically, the material of fiber management tray 2 is ABS(Acrylonitrile Butadiene Styrene, acrylonitrile-butadiene-benzene second
Alkene), it is the terminal protection optical cable of fiber cable laying and the box of tail optical fiber welding, so that disk stores up tail optical fiber and protects connector.
With continued reference to Fig. 1 to Fig. 4, be equipped with top bottom-disc 5 in seal cavity between pedestal 3 and fiber management tray 2, top bottom-disc 5 with
The interval of pedestal 3 setting, to form water area in seal cavity between top bottom-disc 5 and pedestal 3, for that will be infiltrated into from pedestal 3
The ice generated under the intracorporal water of seal chamber or low temperature is partitioned in water area, and then avoids being penetrated and being pierced by two holes due to optical cable
The drawbacks of poorly sealed bring vapor and condensation penetrate into connector box, it is ensured that the optical fiber of fiber management tray 2 is not by ponding or ice
It influences.Specifically, top bottom-disc 5 is set between the intracorporal pedestal 3 of seal chamber and housing 1, and outer diameter is adapted with housing 1, with
Just the sealing for realizing water area between top bottom-disc 5 and pedestal 3, improves the leakproofness of the terminal box, avoid water in water area and
Ice infiltrates into the winding displacement plate cabin of 5 top of top bottom-disc, to avoid ponding or freeze to cause damage i.e. seal cavity to fiber management tray
The phenomenon that corroding occurs in interior metal component or icing ion electrolysis water causes hydrogen damage to fiber management tray inner fiber.To ensure top bottom-disc
5 stability, it is preferable that be connected between top bottom-disc 5 and pedestal 3 by the first bindiny mechanism 6, so that top bottom-disc 5 is fixed
To the top of pedestal 3, while ensuring the intensity of top bottom-disc 5.It is further preferred that the first bindiny mechanism 6 is several along upper bottom
The bolt that disk 5 is circumferentially uniformly arranged avoids its discontinuity to further ensure that the intensity of top bottom-disc 5.
With continued reference to Fig. 1 to Fig. 4, top bottom-disc 5 is provided with sealing structure 8 along its circumferential direction, for sealing water area.Specifically
Ground, sealing structure 8 are arranged along the circumferential complete cycle of top bottom-disc 5, so that gap between top bottom-disc 5 and housing 1 to be fully sealed, in turn
The leakproofness for further increasing water area avoids the water in water area or ice from penetrating into winding displacement plate cabin.
It will be readily appreciated that cable junction box provided in this embodiment, passes through what is formed between housing 1 and pedestal 3
Top bottom-disc 5 is set between pedestal 3 and fiber management tray 2 in seal cavity, to form water area between top bottom-disc 5 and pedestal 3, with
It is partitioned in water area, and then is avoided due to optical cable by the ice generated under the intracorporal water of seal chamber or low temperature is infiltrated into from pedestal 3
It penetrates and is pierced by the poorly sealed bring vapor in two holes and condensation penetrates into drawback in connector box, it is ensured that fiber management tray 2
Optical fiber is not influenced by ponding or ice, that is, water and ice in water area is avoided to infiltrate into the winding displacement plate cabin of 5 top of top bottom-disc, from
And it avoids ponding or freezes causing damage metal component in i.e. seal cavity to fiber management tray and occurring corroding or icing ion electrolysis water
The phenomenon that hydrogen damage is caused to fiber management tray inner fiber.Further, the circumferential setting sealing structure 8 of top bottom-disc 5, to seal water
Area, and then the leakproofness in water area is further increased, to further avoid in the water or ice infiltration winding displacement plate cabin in water area.
With continued reference to Fig. 1 to Fig. 4, the second bindiny mechanism 4 includes: connecting band 41 and connector 42；Wherein, 41 edge of connecting band
1 outer wall of housing setting, to bundle housing 1.Specifically, connecting band 41 is stainless steel belt, and the outer wall along housing 1 will cover
Shell 1 is provide on the base 3.To reinforce connecting band 41 and 3 connective stability of pedestal, it is preferable that the end of connecting band 41 is respectively provided with
Housing 1 is fixed to by connector 42 to be connected with pedestal 3 by connector 42 by connecting band 41 and connector 42
On pedestal 3.Wherein, connecting band 41 is stainless steel belt, and connector 42 is the connectors such as screw.
With continued reference to Fig. 1 to Fig. 4, to realize that the optical unit tubes of optical fiber pass through, it is preferable that if being offered on top bottom-disc 5
A dry light unit enters hole 51, for installing the optical unit tubes of optical fiber, so that optical unit tubes enter in hole 51 to wear to row from light unit
In line plate cabin.To be easy to implement wearing for optical unit tubes, it is further preferred that light unit enters to be provided with rubber cone (figure in hole 51
In be not shown), be provided with sealing nut 52 outside conical section, bore for compressing rubber to seal between optical unit tubes and rubber cone
Gap, to realize the sealing in water area.Optical unit tubes are not limited by the rubber of Small Holes, the hole location from rubber cone center
Across in winding displacement plate cabin.For the leakproofness for further increasing water area, it is preferable that the side wall of top bottom-disc 5 is opened up along its circumferential direction
Fluted (not shown) sets chassis sealing ring 81 for card.It is further preferred that groove is circumferential along the outer wall of top bottom-disc 5
Complete cycle setting.Wherein, groove is opened in the middle position of 5 thickness direction of top bottom-disc.
With continued reference to Fig. 1 to Fig. 4, sealing structure 8 includes: chassis sealing ring 81 and elastic ring 82；Wherein, elastic ring 82 with
Chassis sealing ring 81 is disposed in parallel between top bottom-disc 5 and housing 1 along 5 thickness direction of top bottom-disc, also, 82 part card of elastic ring
Set on top bottom-disc week 5 into the groove opened up.Specifically, chassis sealing ring 81 is silicone rubber O-ring, is set to top bottom-disc 5
Between housing 1, to improve leakproofness between the two.Elastic ring 82 and chassis sealing ring 81 are along the thickness side of top bottom-disc 5
To being set side by side, and part is arranged in groove, is partially set between top bottom-disc 5 and housing 1, is passed through elastic ring 82 and housing
The increased friction sealing structure 8 of 1 inner wall and the frictional strength of housing 1, further increase the intensity and sealing of the cable splice closure
Property.The preferably top that is set to elastic ring 82 of chassis sealing ring 81.Wherein, chassis sealing ring 81 is silicon rubber loop, elastic ring
82 enclose the cyclic structure set for silicon steel sheet.
It should be noted that the processing of housing 1, fiber management tray 2, pedestal 3, top bottom-disc 5, sealing structure 8 need to control processing work
Skill and reduction plus tolerance, that is, control its machining accuracy to ensure the leakproofness of the cable junction box.
To sum up, cable junction box provided in this embodiment, by the seal cavity that is formed between housing 1 and pedestal 3
Top bottom-disc 5 is set between pedestal 3 and fiber management tray 2, to form water area between top bottom-disc 5 and pedestal 3, will be seeped from pedestal 3
It is partitioned in water area to the ice generated under the intracorporal water of seal chamber or low temperature thoroughly, and then avoids penetrating and being pierced by two due to optical cable
The poorly sealed bring vapor in a hole and condensation penetrate into the drawback in connector box, it is ensured that the optical fiber of fiber management tray 2 is not by ponding
Or the influence of ice, that is, avoid water and ice in water area from infiltrating into the winding displacement plate cabin of the top of top bottom-disc 5, thus avoid ponding or
It freezes and causes damage that corroding occurs in metal component in i.e. seal cavity or icing ion electrolysis water is to light in fiber management tray to fiber management tray
Fibre causes the phenomenon that hydrogen damage.Further, the circumferential setting sealing structure 8 of top bottom-disc 5, to seal water area, and then into one
Step improves the leakproofness in water area, to further avoid in the water or ice infiltration winding displacement plate cabin in water area.In addition, the optical cable connects
Wire box is at low cost, and control process is high, it is easy to accomplish its high leakproofness.
Especially, sealing structure 8 provided in this embodiment is improved between top bottom-disc 5 and housing 1 by chassis sealing ring 81
Leakproofness；By the elastic ring 82 being partially arranged in groove, increase the frictional strength of sealing structure 8 and housing 1, with into one
Step improves the intensity and leakproofness of the cable splice closure.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of cable junction box characterized by comprising housing, fiber management tray and pedestal；Wherein,
The housing covers on the pedestal, to form seal cavity；
The fiber management tray is set in the seal cavity, the welding tail optical fiber for the fixed optical fiber that spirals；
Top bottom-disc is equipped in the seal cavity between the pedestal and the fiber management tray, between the top bottom-disc and the pedestal
Every setting, to form water area between top bottom-disc described in the seal cavity and the pedestal, being used for will be from the pedestal
It infiltrates into the intracorporal water of the seal chamber or ice is partitioned in the water area.
2. cable junction box according to claim 1, which is characterized in that
The top bottom-disc is provided with sealing structure along its circumferential direction, for sealing the water area.
3. cable junction box according to claim 2, which is characterized in that the sealing structure include: chassis sealing ring and
Elastic ring；Wherein,
The elastic ring and the chassis sealing ring along the top bottom-disc thickness direction be disposed in parallel in the top bottom-disc with it is described
Between housing, also, the elastic loop section is arranged in the groove that the top bottom-disc circumferentially opens up.
4. cable junction box according to claim 3, which is characterized in that the groove is circumferentially whole along the top bottom-disc outer wall
Week setting.
5. cable junction box according to any one of claims 1 to 4, which is characterized in that
Several light units are offered on the top bottom-disc and enter hole, for installing the optical unit tubes of the optical fiber.
6. cable junction box according to claim 5, which is characterized in that
The light unit, which enters, is provided with rubber cone in hole, sealing nut is provided with outside conical section, for sealing the light unit
Gap between pipe and the rubber cone.
7. cable junction box according to any one of claims 1 to 4, which is characterized in that
It is connected between the top bottom-disc and the pedestal by the first bindiny mechanism.
8. cable junction box according to any one of claims 1 to 4, which is characterized in that
Pedestal sealing ring is provided between the pedestal and the housing, for sealing the seal cavity.
9. cable junction box according to any one of claims 1 to 4, which is characterized in that the housing and the pedestal it
Between by the second bindiny mechanism connect.
10. cable junction box according to claim 9, which is characterized in that second bindiny mechanism includes: along the cover
The connecting band of shell outer wall setting and the connector for being set to the connecting band end；Wherein,
The connecting band is connected with the pedestal by the connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811245406.0A CN109343184B (en) | 2018-10-24 | 2018-10-24 | Optical cable junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811245406.0A CN109343184B (en) | 2018-10-24 | 2018-10-24 | Optical cable junction box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109343184A true CN109343184A (en) | 2019-02-15 |
| CN109343184B CN109343184B (en) | 2022-04-29 |
Family
ID=65311632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811245406.0A Active CN109343184B (en) | 2018-10-24 | 2018-10-24 | Optical cable junction box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109343184B (en) |
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| EP1160608A2 (en) * | 2000-05-29 | 2001-12-05 | Fibot Holding Ltd. | Connection container for optical and/or copper mixed cables |
| CN101533134A (en) * | 2009-04-28 | 2009-09-16 | 江苏中天科技股份有限公司 | Terminal connection box for optical phase conductor |
| CN103984072A (en) * | 2014-05-23 | 2014-08-13 | 国家电网公司 | Self-healing waterproof electric aerial optical cable connector box |
| CN103995327A (en) * | 2014-01-10 | 2014-08-20 | 杭州华宏通信设备有限公司 | Optical cable splice box |
| CN104052013A (en) * | 2014-06-23 | 2014-09-17 | 江苏中天科技股份有限公司 | Junction box for through-flow wires |
| CN104765112A (en) * | 2014-11-17 | 2015-07-08 | 宁波余大通信技术有限公司 | Double-sealing optical cable joint box |
| CN205982780U (en) * | 2016-08-22 | 2017-02-22 | 江苏亨通海洋光网系统有限公司 | Can monitor extra large land cable splice box of electrical property |
| CN107167890A (en) * | 2017-06-29 | 2017-09-15 | 深圳市特发信息股份有限公司 | One kind can ice-melt cable splice closure |
| CN207718032U (en) * | 2017-12-06 | 2018-08-10 | 中国电力科学研究院有限公司 | A kind of insulating splice closure for line feeder fiber composite overhead ground wire |
| CN108565703A (en) * | 2018-06-11 | 2018-09-21 | 蒋莲莲 | Waterproof power distribution cabinet |
-
2018
- 2018-10-24 CN CN201811245406.0A patent/CN109343184B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1160608A2 (en) * | 2000-05-29 | 2001-12-05 | Fibot Holding Ltd. | Connection container for optical and/or copper mixed cables |
| CN101533134A (en) * | 2009-04-28 | 2009-09-16 | 江苏中天科技股份有限公司 | Terminal connection box for optical phase conductor |
| CN103995327A (en) * | 2014-01-10 | 2014-08-20 | 杭州华宏通信设备有限公司 | Optical cable splice box |
| CN103984072A (en) * | 2014-05-23 | 2014-08-13 | 国家电网公司 | Self-healing waterproof electric aerial optical cable connector box |
| CN104052013A (en) * | 2014-06-23 | 2014-09-17 | 江苏中天科技股份有限公司 | Junction box for through-flow wires |
| CN104765112A (en) * | 2014-11-17 | 2015-07-08 | 宁波余大通信技术有限公司 | Double-sealing optical cable joint box |
| CN205982780U (en) * | 2016-08-22 | 2017-02-22 | 江苏亨通海洋光网系统有限公司 | Can monitor extra large land cable splice box of electrical property |
| CN107167890A (en) * | 2017-06-29 | 2017-09-15 | 深圳市特发信息股份有限公司 | One kind can ice-melt cable splice closure |
| CN207718032U (en) * | 2017-12-06 | 2018-08-10 | 中国电力科学研究院有限公司 | A kind of insulating splice closure for line feeder fiber composite overhead ground wire |
| CN108565703A (en) * | 2018-06-11 | 2018-09-21 | 蒋莲莲 | Waterproof power distribution cabinet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109343184B (en) | 2022-04-29 |
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