CN110941060A - Optical cable plugging device - Google Patents
Optical cable plugging device Download PDFInfo
- Publication number
- CN110941060A CN110941060A CN201911398237.9A CN201911398237A CN110941060A CN 110941060 A CN110941060 A CN 110941060A CN 201911398237 A CN201911398237 A CN 201911398237A CN 110941060 A CN110941060 A CN 110941060A
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- Prior art keywords
- groove
- optical cable
- pipeline
- sealing
- semi
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- 230000003287 optical effect Effects 0.000 title claims abstract description 103
- 238000007789 sealing Methods 0.000 claims abstract description 98
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 239000000428 dust Substances 0.000 abstract description 4
- 241000700159 Rattus Species 0.000 abstract description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- 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
- G02B6/44465—Seals
-
- 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
-
- 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
- G02B6/4442—Cap coupling boxes
- G02B6/4444—Seals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses an optical cable plugging device which comprises two half shells connected with each other, wherein a pipeline half groove and an optical cable half groove are formed in the surfaces, opposite to each other, of the two half shells, and the pipeline half groove is communicated with the optical cable half groove; a pipeline sealing groove is formed in the wall of the pipeline half groove, and a pipeline sealing element is embedded in the pipeline sealing half groove; an optical cable sealing groove is formed in the groove wall of the optical cable semi-groove, and an optical cable sealing element is embedded in the optical cable sealing groove. The device embeds the pipeline sealing element in the pipeline half-groove, so that the sealing effect of the pipeline half-groove can be enhanced, and the device can effectively prevent rats and dust; similarly, the optical cable sealing element is embedded in the optical cable half groove, so that the sealing effect of the optical cable half groove can be enhanced. The sealing piece is embedded after the groove is formed, compared with the conventional sealing piece which is plugged by using fire-proof mud, the sealing piece is better in stability and not easy to fall off.
Description
Technical Field
The invention relates to the field of optical cables, in particular to an optical cable plugging device.
Background
The optical cable is an important component of a power communication network and is a transmission medium for connecting each transformer substation, a power distribution room, a power supply station and important users. And the transformer substation framework guide optical cable is used as a connecting medium of the optical cable and the communication machine room, and due to the special position and the operating environment, links such as design, installation, maintenance, first-aid repair and the like have particularity. The electric power guide optical cable has high requirements on installation process and quality, is a weak link of the whole optical cable, and is a multi-fault point of the optical cable.
The technical principle of secondary system planning of power grids 35kV and above by southern China Power grid Limited liability company and the accident prevention measures of southern China Power grid company make clear protection requirements on the protection of the guide optical cable of the transformer substation framework. Taking the technical principle of secondary system planning of power grids 35kV and above by China southern Power grid Limited liability company as an example, the internal requirements are as follows: the buried part of the guide optical cable is a galvanized steel pipe, the buried depth is not less than 200mm, and the optical cable in the steel pipe is protected by a sleeve pipe (preferably a PE pipe). The sub-pipe and the galvanized steel pipe are subjected to rat-proof plugging treatment. The existing common plugging method is fireproof mud plugging, however, the fireproof mud is easy to fall off after running for a period of time, is not beautiful, is easy to lose the plugging effect, needs regular maintenance and has large daily workload.
Disclosure of Invention
The invention aims to provide an optical cable plugging device to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
an optical cable plugging device comprises two half shells which are connected with each other, wherein a pipeline half groove and an optical cable half groove are formed in the surfaces, arranged oppositely, of the two half shells, and the pipeline half groove is communicated with the optical cable half groove;
a pipeline sealing groove is formed in the wall of the pipeline half groove, and a pipeline sealing element is embedded in the pipeline sealing half groove; an optical cable sealing groove is formed in the groove wall of the optical cable semi-groove, and an optical cable sealing element is embedded in the optical cable sealing groove.
Optionally, one surface of each of the two half shells, which is arranged in opposite directions, is provided with a connecting sealing groove, the connecting sealing groove is communicated with the pipeline sealing groove and the optical cable sealing groove, and a connecting sealing element is embedded in the connecting sealing groove;
the two pipeline half grooves are combined to form an optical cable pipeline groove used for containing an optical cable pipeline, and the two optical cable half grooves are combined to form an optical cable groove used for containing an optical cable.
Optionally, two pipeline sealing gaps respectively arranged at two sides of the pipeline half groove are formed on one surface of the pipeline sealing groove, which is arranged in the opposite direction of the two half shells;
two optical cable sealing gaps which are respectively arranged at two sides of the optical cable half groove are formed on one surface of the optical cable sealing groove, which is arranged in the opposite direction of the two half shells;
two the half shell has seted up two connection seal grooves in the one side that sets up in opposite directions, lies in the pipeline seal breach and the sealed breach of optical cable of same one side and passes through one the connection seal groove intercommunication.
Optionally, the optical cable sealing element, the duct sealing element and the connecting sealing element located in the same half shell are integrally formed to form a total sealing element, and the total sealing element is an EVA foam adhesive tape.
Optionally, one of the two half shells is provided with a seam allowance, and the other half shell is fixedly provided with a buckle; the buckle is connected with the spigot in a clamping manner;
the tang with the buckle is located two respectively half shell sets up in opposite directions on the one side.
Optionally, two sides of the pipe half-groove of one half-shell are respectively provided with a seam allowance group, and two sides of the optical cable half-groove are respectively provided with one seam allowance; each seam allowance group comprises a plurality of seam allowances which are distributed at equal intervals;
two sides of the pipeline half groove of the other half shell are respectively provided with a buckle group, and two sides of the optical cable half groove are respectively provided with a buckle; each buckle group comprises a plurality of buckles distributed at equal intervals.
Optionally, the half shell includes a first half cylinder, and one end of the first half cylinder is fixedly provided with a half round table; the pipeline half-groove is formed in the first semi-cylinder and the semi-circular truncated cone; a second semi-cylinder is fixedly arranged at one end of the semi-circular table, which is far away from the first semi-cylinder, and the optical cable semi-groove is formed in the second semi-cylinder; the diameter of the second semi-cylinder is smaller than that of the first semi-cylinder;
the pipeline half-groove is in first semicircle post deviates from be formed with the pipeline opening on the one side of second semicircle post, the optical cable half-groove is in the second semicircle post deviates from be formed with the optical cable opening on the one side of first semicircle post.
Optionally, two sides of the first half cylinder are respectively provided with a first connecting edge, two sides of the half round table are respectively provided with a second connecting edge, and two sides of the second half cylinder are respectively provided with a third connecting edge; one end of the second connecting edge is fixedly connected with the first connecting edge positioned on the same side, and the other end of the second connecting edge is fixedly connected with the third connecting edge positioned on the same side;
the two spigot groups/buckle groups which are respectively arranged at the two sides of the pipeline half groove are respectively arranged on the two first connecting edges; the two rabbets/buckles which are respectively arranged on the two sides of the optical cable half groove are respectively arranged on the two third connecting edges.
Optionally, the second half cylinder includes an outer convex portion formed by the circular truncated cone protruding outward of the pipe half groove and an inner convex portion formed by the circular truncated cone protruding inward of the pipe half groove, and a reinforcing rib is fixedly disposed between the inner convex portion and the pipe half groove.
Compared with the prior art, the invention has the following beneficial effects:
according to the optical cable plugging device provided by the invention, the pipeline sealing element is embedded in the pipeline half groove, so that the sealing effect of the pipeline half groove can be enhanced, and the rat and dust can be effectively prevented; similarly, the optical cable sealing element is embedded in the optical cable half groove, so that the sealing effect of the optical cable half groove can be enhanced. The sealing piece is embedded after the groove is formed, compared with the conventional sealing piece which is plugged by using fire-proof mud, the sealing piece is better in stability and not easy to fall off.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.
Fig. 1 is a schematic structural diagram of an optical cable plugging device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a half-shell according to an embodiment of the present invention.
Illustration of the drawings: 1. a half shell; 101. a first connecting edge; 102. a second connecting edge; 103. a third connecting edge; 104. reinforcing ribs; 11. a pipeline half-groove; 12. an optical cable half-groove; 2. a total seal; 21. a pipe seal; 22. a cable seal; 23. connecting a sealing element; 31. buckling; 32. and (5) stopping the opening.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The invention provides an optical cable plugging device.
Referring to fig. 1, the optical cable plugging device includes two half shells 1 connected to each other, a duct half-groove 11 and an optical cable half-groove 12 are formed on opposite sides of the two half shells 1, and the duct half-groove 11 is communicated with the optical cable half-groove 12.
The groove wall of the pipeline half groove 11 is provided with a pipeline sealing groove, and a pipeline sealing element 21 is embedded in the pipeline sealing half groove. An optical cable sealing groove is formed in the groove wall of the optical cable half groove 12, and an optical cable sealing element 23 is embedded in the optical cable sealing groove.
After the two half shells 1 are spliced, the two pipeline half grooves 11 are combined to form an optical cable pipeline groove for accommodating an optical cable pipeline, and the two optical cable half grooves 12 are combined to form an optical cable groove for accommodating an optical cable.
The pipeline sealing element 21 is embedded in the pipeline half-groove 11, so that the sealing effect of the pipeline half-groove 11 can be enhanced, and the mouse and dust can be effectively prevented; similarly, the cable sealing member 23 is embedded in the cable half-groove 12 to enhance the sealing effect of the cable half-groove 12. The sealing piece is embedded after the groove is formed, compared with the conventional sealing piece which is plugged by using fire-proof mud, the sealing piece is better in stability and not easy to fall off.
Further, all seted up the connection seal groove on the one side that two half shells 1 set up in opposite directions, connection seal groove intercommunication pipeline seal groove and optical cable seal groove, connect the embedded connecting seal piece 23 that is equipped with of seal groove. The sealing element also enhances the sealing effect between the two half-shells 1.
Specifically, the pipe sealing groove is formed with two pipe sealing notches respectively disposed at two sides of the pipe half groove 11 on one surface of the two half shells 1 oppositely disposed.
The cable sealing groove is formed with two cable sealing gaps respectively arranged at two sides of the cable half-groove 12 on one surface of the two half-shells 1 which are oppositely arranged.
Two connection sealing grooves are formed in the opposite faces of the two half shells 1, and the pipeline sealing gap and the optical cable sealing gap which are located on the same side are communicated through one connection sealing groove.
The optical cable sealing element 23, the pipeline sealing element 21 and the connecting sealing element 23 which are positioned in the same half shell 1 are integrally formed to form a total sealing element 2, and the total sealing element is EVA foam adhesive tape. The integrated molding is convenient for integral quick installation.
The two half-shells 1 can be fixedly connected by means of bolts, more preferably detachably connected by means of the bayonet 31 and the spigot 32. Illustratively, one of the two half shells 1 is provided with a seam allowance 32, and the other half shell 1 is fixedly provided with a buckle 31. The catch 31 engages the connection spigot 32.
The seam allowance 32 and the buckle 31 are respectively arranged on the surfaces of the two half shells 1 which are oppositely arranged.
Two sides of the pipeline half groove 11 of one half shell 1 are respectively provided with a seam allowance 32 group, and two sides of the optical cable half groove 12 are respectively provided with a seam allowance 32. Each of the sets of the seam allowances 32 includes a plurality of seam allowances 32 that are equally spaced.
Two sides of the pipe half-groove 11 of the other half-shell 1 are respectively provided with a buckle 31 group, and two sides of the optical cable half-groove 12 are respectively provided with a buckle 31. Each clip 31 group includes a plurality of equally spaced clips 31.
In this embodiment, the half-shell 1 includes a first half cylinder, and one end of the first half cylinder is fixedly provided with a half truncated cone. The pipeline half-groove 11 is arranged on the first half-cylinder and the half-round table. The end of the semi-circular table departing from the first semi-cylinder is fixedly provided with a second semi-cylinder, and the optical cable semi-groove 12 is arranged on the second semi-cylinder. The diameter of the second semi-cylinder is smaller than the diameter of the first semi-cylinder.
Two sides of the first semi-cylinder are respectively provided with a first connecting edge 101, two sides of the semi-circular table are respectively provided with a second connecting edge 102, and two sides of the second semi-cylinder are respectively provided with a third connecting edge 103. One end of the second connecting edge 102 is fixedly connected to the first connecting edge 101 on the same side, and the other end is fixedly connected to the third connecting edge 103 on the same side.
Two spigot 32 sets/snap 31 sets respectively disposed on both sides of the duct half-channel 11 are respectively disposed on the two first connecting edges 101. The two rabbets 32/buckles 31 respectively arranged at the two sides of the cable half-groove 12 are respectively arranged on the two third connecting edges 103.
The second semi-cylinder comprises an outer convex part formed by the circular truncated cone protruding towards the outside of the pipeline semi-groove 11 and an inner convex part formed by the circular truncated cone protruding towards the inside of the pipeline semi-groove 11, and a reinforcing rib 104 is fixedly arranged between the inner convex part and the pipeline semi-groove 11. The half-shell 1 can be integrally formed.
In the embodiment, the pipeline sealing element 21 is embedded in the pipeline half-groove 11, so that the sealing effect of the pipeline half-groove 11 can be enhanced, and the protection against rats and dust is effective; similarly, the cable sealing member 23 is embedded in the cable half-groove 12 to enhance the sealing effect of the cable half-groove 12. The sealing piece is embedded after the groove is formed, compared with the conventional sealing piece which is plugged by using fire-proof mud, the sealing piece is better in stability and not easy to fall off. Further, the present embodiment also enhances the stability between the two half-shells 1 by the provision of the connecting seal 23. Furthermore, the two half shells 1 are connected in a snap-fit manner through the spigots 32 of the buckles 31, so that the half shells are convenient to disassemble and assemble.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The optical cable plugging device is characterized by comprising two half shells which are connected with each other, wherein a pipeline half groove and an optical cable half groove are formed in the surfaces, opposite to each other, of the two half shells, and the pipeline half groove is communicated with the optical cable half groove;
a pipeline sealing groove is formed in the wall of the pipeline half groove, and a pipeline sealing element is embedded in the pipeline sealing half groove; an optical cable sealing groove is formed in the groove wall of the optical cable semi-groove, and an optical cable sealing element is embedded in the optical cable sealing groove.
2. The optical cable plugging device according to claim 1, wherein a connecting sealing groove is formed in each of the two opposite surfaces of the half shells, the connecting sealing groove communicates the pipe sealing groove and the optical cable sealing groove, and a connecting sealing member is embedded in the connecting sealing groove;
the two pipeline half grooves are combined to form an optical cable pipeline groove, and the two optical cable half grooves are combined to form an optical cable groove.
3. The optical cable plugging device according to claim 2, wherein the duct sealing groove is formed with two duct sealing notches respectively disposed at two sides of the duct half groove on a surface of the two half shells oppositely disposed;
two optical cable sealing gaps which are respectively arranged at two sides of the optical cable half groove are formed on one surface of the optical cable sealing groove, which is arranged in the opposite direction of the two half shells;
two the half shell has seted up two connection seal grooves in the one side that sets up in opposite directions, lies in the pipeline seal breach and the sealed breach of optical cable of same one side and passes through one the connection seal groove intercommunication.
4. An optical cable closure device as claimed in claim 2, wherein said cable sealing means, said duct sealing means and said connecting sealing means in the same half shell are integrally formed to form a total sealing means, said total sealing means being EVA foam tape.
5. An optical cable plugging device according to claim 1, wherein one of the two half shells is provided with a spigot, and the other half shell is fixedly provided with a buckle; the buckle is connected with the spigot in a clamping manner;
the tang with the buckle is located two respectively half shell sets up in opposite directions on the one side.
6. An optical cable closure device as claimed in claim 5, wherein each of the tube half channels of one of said half shells has a respective set of said rabbets, and each of the cable half channels has a respective one of said rabbets; each seam allowance group comprises a plurality of seam allowances which are distributed at equal intervals;
two sides of the pipeline half groove of the other half shell are respectively provided with a buckle group, and two sides of the optical cable half groove are respectively provided with a buckle; each buckle group comprises a plurality of buckles distributed at equal intervals.
7. An optical cable closure device as claimed in claim 6, wherein said half shell comprises a first half cylinder, one end of said first half cylinder being fixedly provided with a half cone; the pipeline half-groove is formed in the first semi-cylinder and the semi-circular truncated cone; a second semi-cylinder is fixedly arranged at one end of the semi-circular table, which is far away from the first semi-cylinder, and the optical cable semi-groove is formed in the second semi-cylinder; the diameter of the second semi-cylinder is smaller than that of the first semi-cylinder;
the pipeline half-groove is in first semicircle post deviates from be formed with the pipeline opening on the one side of second semicircle post, the optical cable half-groove is in the second semicircle post deviates from be formed with the optical cable opening on the one side of first semicircle post.
8. An optical cable plugging device according to claim 7, wherein a first connecting edge is provided on each side of the first semi-cylinder, a second connecting edge is provided on each side of the semi-circular table, and a third connecting edge is provided on each side of the second semi-cylinder; one end of the second connecting edge is fixedly connected with the first connecting edge positioned on the same side, and the other end of the second connecting edge is fixedly connected with the third connecting edge positioned on the same side;
the two spigot groups/buckle groups which are respectively arranged at the two sides of the pipeline half groove are respectively arranged on the two first connecting edges; the two rabbets/buckles which are respectively arranged on the two sides of the optical cable half groove are respectively arranged on the two third connecting edges.
9. The optical cable plugging device of claim 8, wherein the second semi-cylinder comprises an outer protrusion formed by the circular truncated cone protruding outward of the duct semi-channel and an inner protrusion formed by the circular truncated cone protruding inward of the duct semi-channel, and a reinforcing rib is fixedly arranged between the inner protrusion and the duct semi-channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398237.9A CN110941060A (en) | 2019-12-30 | 2019-12-30 | Optical cable plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911398237.9A CN110941060A (en) | 2019-12-30 | 2019-12-30 | Optical cable plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110941060A true CN110941060A (en) | 2020-03-31 |
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ID=69913419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911398237.9A Pending CN110941060A (en) | 2019-12-30 | 2019-12-30 | Optical cable plugging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110941060A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4652023A (en) * | 1984-02-13 | 1987-03-24 | Timmons Fred A | Repair coupler |
| US20050191903A1 (en) * | 2004-03-01 | 2005-09-01 | Andrew Corporation | Cable and apparatus interface environmental seal |
| CN203014331U (en) * | 2012-12-06 | 2013-06-19 | 国家电网公司 | Plugging device of down-lead cable |
| CN211180334U (en) * | 2019-12-30 | 2020-08-04 | 广东电网有限责任公司 | Optical cable plugging device |
-
2019
- 2019-12-30 CN CN201911398237.9A patent/CN110941060A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4652023A (en) * | 1984-02-13 | 1987-03-24 | Timmons Fred A | Repair coupler |
| US20050191903A1 (en) * | 2004-03-01 | 2005-09-01 | Andrew Corporation | Cable and apparatus interface environmental seal |
| CN203014331U (en) * | 2012-12-06 | 2013-06-19 | 国家电网公司 | Plugging device of down-lead cable |
| CN211180334U (en) * | 2019-12-30 | 2020-08-04 | 广东电网有限责任公司 | Optical cable plugging device |
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