CN203630401U - Cross connecting cabinet for optical cable and communication well in operation - Google Patents
Cross connecting cabinet for optical cable and communication well in operation Download PDFInfo
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- CN203630401U CN203630401U CN201320407246.1U CN201320407246U CN203630401U CN 203630401 U CN203630401 U CN 203630401U CN 201320407246 U CN201320407246 U CN 201320407246U CN 203630401 U CN203630401 U CN 203630401U
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Abstract
本实用新型实施例提供一种光缆交接箱和通信作业井，光缆交接箱包括：箱主体、箱门和箱盖；箱门呈矩形，具有箱门边框，箱门边框与箱主体的箱体边框在闭合状态下接触；箱盖边框具有在关闭时与箱主体对应箱体边框的第四密封胶条进行压合的第一密封胶条；箱门边框的外边沿具有在关闭时与箱主体对应箱体边框的第五密封胶条进行压合的第二密封胶条；箱门边框的内边沿具有在关闭时与箱主体对应箱体边框的第六密封胶条进行咬合的第三密封胶条。第一密封胶条与第四密封胶条形成一层密封，第二密封胶条与第五密封胶条形成一层密封，第三密封胶条与第六密封胶条形成一层密封，内边沿接触处的密封胶条压合或者咬合在一起，增加了光缆交接箱的防水性能。
The embodiment of the utility model provides an optical cable transfer box and a communication operation well. The optical cable transfer box includes: a box main body, a box door and a box cover; the box door is rectangular and has a box door frame, and the box door frame and the box body frame of the box main body Contact in the closed state; the box cover frame has a first sealing strip that is pressed together with the fourth sealing strip of the box body corresponding to the box body frame when it is closed; the outer edge of the box door frame has a corresponding The fifth sealing strip of the box frame is pressed together with the second sealing strip; the inner edge of the box door frame has a third sealing strip that is engaged with the sixth sealing strip of the box frame corresponding to the box body when it is closed . The first sealant strip forms a layer of seal with the fourth sealant strip, the second sealant strip forms a layer of seal with the fifth sealant strip, the third sealant strip forms a layer of seal with the sixth sealant strip, and the inner edge The sealing rubber strips at the contact are pressed or snapped together, which increases the waterproof performance of the optical cable junction box.
Description
Technical field
The utility model relates to optical cable technology, refers to especially a kind of fiber cable cross connection box and communication operations well.
Background technology
Fiber cable cross connection box is the handing-over equipment that optical cable Cheng Duan, jumper connection are provided for trunk layer optical cable, wiring layer optical cable.Optical cable leading in cable cross-connecting box, through fixing, termination with join after fibre, uses jumping fiber that trunk layer optical cable and wiring layer optical cable are communicated with.Buried optical cable distribution box be fiber cable cross connection box is placed in underground, thereby reduce the taking of surface of the street, effectively avoid the impact of communication operations on traffic.
In prior art, adopt the fiber cable cross connection box that inert gas injection is sealed to realize moistureproof and anticorrosion, adopt gas-development agent uninterruptedly to put and on doorframe, produce sealing effectiveness.Buried optical cable distribution box has increased the volume of casing, excavate separately hole body and bury underground, has increased the limitation of engineering construction ground point selection; Engineer operation personnel need enter casing operation has increased engineer operation difficulty.
There are the following problems for prior art: buried optical cable distribution box only adopts simple sealing can not play waterproof action, along with passage of time, the effect of casing O-ring seal after long rainwater soaks can be degenerated, and box house also can produce water condensation phenomenon because of climate change.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of fiber cable cross connection box and communication operations well, solves in prior art, and fiber cable cross connection box only adopts the effectively defect of waterproof of simple sealing.
For solving the problems of the technologies described above, embodiment of the present utility model provides a kind of fiber cable cross connection box, comprising: box main body, chamber door and case lid; Chamber door is rectangular, has chamber door frame, and chamber door frame contacts under closure state with the casing frame of box main body; Case lid frame has the first sealing joint strip that the 4th sealing joint strip of casing frame corresponding to box main body carries out pressing in the time closing; The outer edge of chamber door frame has the second sealing joint strip that the 5th sealing joint strip of casing frame corresponding to box main body carries out pressing in the time closing; The inside edge of chamber door frame has the 3rd sealing joint strip that the 6th sealing joint strip of casing frame corresponding to box main body carries out interlock in the time closing.
In described fiber cable cross connection box, the 3rd sealing joint strip is specifically convex before interlock, is the concave-convex type sealing joint strip of matrix after interlock, specifically convex sealing joint strip of the 6th sealing joint strip.
In described fiber cable cross connection box, the sealing joint strip of the corresponding casing frame of box main body, the first sealing joint strip, the second sealing joint strip, the 3rd sealing joint strip, the 4th sealing joint strip, the 5th sealing joint strip and the 6th sealing joint strip adopt ethylene-propylene-diene rubber.
In described fiber cable cross connection box, at chamber door outer setting waterproof cooling respirator, described waterproof cooling respirator connects described chamber door, and heat absorbing end is positioned at the inside of box main body, and radiating end is positioned at the outside of chamber door.
In described fiber cable cross connection box, the described case lid of the enclosure-type that employing waterproof material is made is positioned at chamber door outside and wraps chamber door.
In described fiber cable cross connection box, also comprise: enter cable pipe, be positioned at a side of box main body, one end is exposed to outside, one end is positioned at the optical cable of box main body inside and introduces district.
In described fiber cable cross connection box, also comprise: enter cable pipe and be positioned at one end of described fiber cable cross connection box outside, realize socket by heat-shrinkable T bush and a plastic tube; Described plastic tube is for accommodating optical cable.
In described fiber cable cross connection box, box main body inside is provided with the horizontal flipping pages for isolating the molten fibre of optical cable and optical cable Cheng Duan, the upper surface of flipping pages is realized optical cable jumper connection, lower surface is realized optical cable Cheng Duan, lead fine groove realization by the L-type of flipping pages lower surface and lead fibre, it is molten fine that optical cable is realized in the welding area in box main body.
A kind of communication operations well, for accommodating fiber cable cross connection box, described communication operations well comprises: hand well, volume is greater than the volume of fiber cable cross connection box; Pre-buried well, is positioned at a side of hand well, and the degree of depth of pre-buried well is greater than the degree of depth of described hand well; Between pre-buried well and hand well, there is pipeline between the well of an inclination.
In described communication operations well, in hand well, also comprise ground connection high voltage protective copper rod, at least two ground connection anchors for fixed light cable distributing box; Multiplely enter cable pipe for what input cable.
In described communication operations well, also comprise: the bottom of hand well has at least two spillway holes.
The beneficial effect of technique scheme of the present utility model is as follows: adopt three-layer sealed structure, first sealing joint strip at case lid frame place and the 4th sealing joint strip form one deck hermetically-sealed construction, the second sealing joint strip and the 5th sealing joint strip form one deck hermetically-sealed construction, the 3rd sealing joint strip and the 6th sealing joint strip form one deck hermetically-sealed construction, so, in the time that chamber door, case lid and box main body are closed, the sealing joint strip pressing of contact position, inside edge or be interlocked, has increased the water resistance of fiber cable cross connection box.
Accompanying drawing explanation
Fig. 1 represents the structural representation of fiber cable cross connection box;
Fig. 2 A represents the structural representation one of fiber cable cross connection box;
Fig. 2 B represents the structural representation two of fiber cable cross connection box
Fig. 3 represents the structural representation three of fiber cable cross connection box;
Fig. 4 A represents that the 3rd sealing joint strip and the 6th sealing joint strip realize the schematic diagram of interlock;
Fig. 4 B represents the schematic diagram of each sealing joint strip at the diverse location of fiber cable cross connection box;
Fig. 5 represents the schematic diagram of hand well;
Fig. 6 represents a kind of schematic diagram of communication operations well;
Fig. 7 represents the tune dress schematic diagram of buried optical cable distribution box;
Fig. 8 represents the fixing schematic diagram of buried optical cable distribution box;
Fig. 9 represents the inlet pipe schematic diagram of buried optical cable distribution box;
Figure 10 represents hand well filling schematic diagram;
Figure 11 represents well lid to fill out and cover the schematic diagram that completes shutoff the aboveground side of hand;
1 first sealing joint strip
2 second sealing joint strips
3 the 3rd sealing joint strips
4 chamber doors
5 box main bodies
6 flipping pages
7 optical branching devices
8 optical connector berthing spaces
9 optical cables are introduced district
The 10 straight melting zones of optical cable
11 optical cable strengthening core fixed areas
12 Overline rings
13 waterproof cooling respirators
14 ground connection high voltage protective copper rods
15 three point latch
16 hex bolts
17 case lids
18 the 4th sealing joint strips
19 the 5th sealing joint strips
20 the 6th sealing joint strips
21 guiding gutters.
Embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
In the utility model, analyzed optical-fiber network application situation and design feature, according to the Demand Design of installation environment and service area fiber cable cross connection box and the technology of erecting optical cables cross-connecting box how.
As shown in Figure 1, the stainless steel casing of fiber cable cross connection box comprises chamber door 4, case lid 17 and box main body 5; Wherein, the structure of case lid 17 as shown in Figure 2 B.
In box main body 5, be equipped with:
Flipping pages 6, realizes optical cable and becomes end and the function of jumper connection;
Introduce district 9 for realizing the fixing optical cable of optical cable strengthening core;
The straight melting zone 10 of optical cable, comprising: fibre melting disc, left rail and right guide rail;
Optical cable strengthening core fixed area 11;
Lead fine groove, three point latch 15,
Between chamber door 4 and box main body 5, there is Overline ring 12, for passing through optical cable;
And jumping fiber Pan Chu district, containing belt type optical cable peeling protector.
Cabinet design and installation relate to process structure, installation environment.Process structure is mainly studied box body tightness, contour structures, inner structure and other barrier propterties; Casing is installed on communication operations hand well, realizes drain function by the difference of elevation of two adjacent well, and how newly-built or transform existing hand well installation environment mainly studied, and installs to adapt to buried optical cable distribution box.
The utility model embodiment provides a kind of fiber cable cross connection box, as shown in Fig. 2 A, Fig. 2 B and Fig. 3, comprising:
Box main body 5, chamber door 4 and case lid 17; Chamber door 4 is rectangular, has chamber door frame, and chamber door frame contacts under closure state with the casing frame of box main body 5;
Case lid frame has the first sealing joint strip 1 that the 4th sealing joint strip 18 of casing frame corresponding to box main body carries out pressing in the time closing;
The outer edge of chamber door frame has the second sealing joint strip 2 that the 5th sealing joint strip 19 of casing frame corresponding to box main body carries out pressing in the time closing;
The inside edge of chamber door frame has the 3rd sealing joint strip 3 that the 6th sealing joint strip 20 of casing frame corresponding to box main body carries out interlock in the time closing.
The technical scheme that application provides, adopt three-layer sealed structure, the first sealing joint strip 1 and the 4th sealing joint strip 18 at case lid frame place form one deck hermetically-sealed construction, the second sealing joint strip 2 and the 5th sealing joint strip 19 form one deck hermetically-sealed construction, the 3rd sealing joint strip 3 and the 6th sealing joint strip 20 form one deck hermetically-sealed construction, so, and in the time that chamber door 4, case lid 17 are closed with box main body 5, the sealing joint strip pressing of contact position, inside edge or be interlocked, has increased the water resistance of fiber cable cross connection box.
No matter the residing geographic position of fiber cable cross connection box, in below ground, adopts underground unsettled or other land-fill methods, does not get rid of the possibility of being flooded completely, therefore needs to realize hermetic water-proof structure completely.
For realizing waterproof, stainless steel casing adopts enclosure-type chamber door, the sealing joint strip of three-decker, waterproof cooling respirator 13, and thermal shrinkage type containment member outside fiber cable cross connection box.
Chamber door is topmost containment member.
In the time of sealing experiment, find, one deck hermetically-sealed construction cannot ensure its sealing completely, has trace infiltration phenomenon after long-time immersion, has therefore all installed sealing joint strip additional at the outer edge of case lid frame, chamber door frame and the inside edge of chamber door frame, so, realized three-layer sealed structure.
In a preferred embodiment, as shown in Figure 4 A, the 3rd sealing joint strip is concave-convex type sealing joint strip, and the corresponding casing frame of box main body place adopts convex sealing joint strip.
The 3rd sealing joint strip is positioned at doorframe inside edge, is not convex when interlock, is matrix after interlock.The 6th sealing joint strip is convex.
As shown in Figure 4 B, comprise the ground floor hermetically-sealed construction that the first sealing joint strip 1 and the 4th sealing joint strip 18 form, the second layer hermetically-sealed construction that the second sealing joint strip 2 and the 5th sealing joint strip 19 form.
As shown in Fig. 2 A, Fig. 2 B and Fig. 3, in Fig. 2 A, chamber door 4 is with box main body 5 state of closing, and in Fig. 2 B, chamber door 4 in opened condition.The outer edge of chamber door frame is fastening by the pressing of two-layer sealing joint strip dress by the hex bolts 16 of chamber door; The locking of the three point latch 15 of the inside edge of chamber door frame by chamber door is by sealing joint strip pressing; The inside edge of chamber door frame adopts the convex sealing joint strip 20 of concave-convex type sealing joint strip 3 casing frame corresponding to box main body to coordinate, the impact of clossing pressure while being subject to chamber door locking, concave-convex type sealing joint strip-tri-sealing joint strips 3 are matrix after pushed by the 6th sealing joint strip 20 of convex, the 6th sealing joint strip 20 of the 3rd sealing joint strip 3 two ends waterproof edges and convex is engaged, has realized the effect of multiaspect gluing, sealing at chamber door frame place.
In a preferred embodiment, each sealing joint strip adopts ethylene-propylene-diene rubber.Under outdoor environment, the sealing joint strip of ethylene-propylene-diene rubber has anti-oxidant and resistance to corrosion, and degree of protection reaches IP68 level, with chamber door 4 and the effective seal cavity of box main body 5 common formation of sealing joint strip, prevents that inner optical cable is by water erosion.
As shown in Figure 3, in a preferred embodiment, at chamber door outer setting waterproof cooling respirator 13, described waterproof cooling respirator 13 connects described chamber door, and heat absorbing end is positioned at the inside of box main body 5, and radiating end is positioned at the outside of chamber door 4.
Water-proof ventilated respiration device, is waterproof vent valve, comprising: nut, hollow screw pillar, waterproof ventilated membrane, hollow screw pillar top cover.
Waterproof and breathable function is mainly completed by waterproof ventilated membrane, and this waterproof ventilated membrane is a kind of novel high polymer waterproof material.In principle, under the state of steam, particle water is very tiny, according to the principle of capillary moving, can be penetrated into smoothly kapillary to opposite side, thereby vapour phenomenon occurs.When steam condensation becomes after the globule, it is large that particle becomes, and owing to pullling and contending with mutually between the capillary effect-hydrone of the globule, hydrone just can not depart from smoothly the globule and be penetrated into opposite side, namely prevented that the infiltration of water from occurring.
Degree of protection (Ingress Protection) represents with IP, formed by two fixing identification letter IP and two feature numerals that represent degree of protection, grade IP68 represents the highest level of degree of protection, in two numerals, the 1st the anti-solid of Digital ID contacts and breakdown capability, the ability of the 2nd Digital ID water resistant.
In a preferred embodiment, as shown in Figure 4 B, between the outer edge of chamber door frame and case lid frame, there is guiding gutter 21, contain the water-cooled condensation of being discharged by waterproof cooling respirator 13.Further strengthen sealing effectiveness.
The described case lid of the enclosure-type that in a preferred embodiment, employing waterproof material is made is positioned at chamber door outside and wraps chamber door.
Fiber cable cross connection box has two kinds of mounting meanss: floor-type cable cross-connection cabinet, to install on the ground, and one-piece construction has larger space extending longitudinally, and box house adopts on lower molten fibre and becomes end, and operating space is large.Buried optical cable distribution box, is installed on underground.
In a preferred embodiment, box main body 5 inside are provided with the horizontal flipping pages for isolating the molten fibre of optical cable and optical cable Cheng Duan, the upper surface of flipping pages is realized optical cable jumper connection, lower surface is realized optical cable Cheng Duan, lead fine groove realization by the L-type of flipping pages lower surface and lead fibre, it is molten fine that optical cable is realized in the welding area in box main body 5.
Flipping pages has been isolated the lift-launch function of fiber optic adapters and the optical cable welding function of block, reduce the overall weight of flipping pages, frequent operation while avoiding engineering maintenance operation causes and jolts looseningly optical cable fusion point, has realized that volume is little, function is complete, the feature of simple operation.Adopt the unexistent flipping pages design of existing buried optical cable distribution box, by the function singleness of its load, make engineer operation lighter.
The technological design of flipping pages has considered that jumper connection becomes the fine problem of dish of end tail optical fiber.
In a preferred embodiment, above flipping pages, be provided with for be wound around optical cable around fine post.Two adapter mounting bars are also set on flipping pages, on mounting bar, match the fiber optic adapters of various models.
Optical cable enters cable mode under adopting, and adopts full weld PROCESS FOR TREATMENT stainless steel to enter cable pipe.
The fiber cable cross connection box of finished product as shown in Figure 3.
In a preferred embodiment, enter the optical cable that cable pipe is positioned at bottom half and introduce district, in hand well, adopt high-quality heat-shrinkable T bush that the entrance hole that enters cable pipe is managed and is connected sealing with son.
Free time son pipe in box house and reserved well adopts pipe close or gas-development agent to cram, and realizes waterproof.
Provide and be applicable to being installed on the buried optical cable distribution box in hand well, comprised stainless steel casing, molten fiber module, flipping pages, optical branching device, optical connector berthing space, jumping fiber Pan Chu district, the straight melting zone of optical cable (containing welding and dish fiber module by left rail, right guide rail), optical cable introducing district (containing belt type optical cable peeling protector), lead the conventional modules such as fine groove, three point latch 15, waterproof module.Flipping pages is mainly realized optical cable and is become end and the function of jumper connection, and waterproof module mainly comprises the thermal shrinkage type containment member composition outside sealing joint strip, waterproof cooling respirator 13 and the fiber cable cross connection box of sealed container door outside chamber door, three-decker.
The utility model provides a kind of communication operations well, as shown in Figure 6, comprising:
Hand well, volume is greater than the volume of fiber cable cross connection box;
Pre-buried well, is positioned at a side of hand well, and the degree of depth of pre-buried well is greater than the degree of depth of described hand well;
Between pre-buried well and hand well, there is pipeline between the well of an inclination.
If be directly connected with existing pipeline after installing under fiber cable cross connection box, the optical cable that enters fiber cable cross connection box coils and stays nowhere, if directly dish is stayed in existing hand well, can cause pipe well congested, therefore build 1 meter～5 meters of middle distance hand well at Practical Project and set up a reserved well.
In a preferred embodiment, as shown in Figure 5, upper left side is the effect of analysing and observe of hand well, lower left is the effect of overlooking of hand well, right-hand is the transparent effect that fiber cable cross connection box is installed, and also comprises ground connection high voltage protective copper rod 14 in hand well, at least two ground connection anchors for fixed light cable distributing box;
Multiplely enter cable pipe for what input cable.
If casing long period of soaking, in ponding, still can impact the constructing operation of engineering construction and upkeep operation, preferentially draining in time before operation, the reserved well that therefore also needs this to set up.
As shown in Figure 6, in a preferred embodiment, reserved well depth is greater than hand well depth, and between two wells, pipeline is tilted to reserved well direction by hand well, builds gradient and is greater than 30 degree.The bottom of hand well is higher than the bottom of reserved well.
In order further to improve drainage effect, in a preferred embodiment, communication operations well also comprises: the bottom of hand well has at least two spillway holes.At prefabricated two spillway holes of hand bottom, fill out cobblestone.Whether, after prefabricated hand well completes, need check hand well mesohigh ground connection, pre-buried erection bolt consistent with casing, installation dimension is 915mm*530mm.
As shown in Figure 7, use crane that fiber cable cross connection box is hung in hand well.As shown in Figure 8, use tubular key by M16 fastening nuts, the high voltage protective ground wire on fiber cable cross connection box interior cables fixed head, by position, box main body hole pull-out, is connected in hand well high voltage protective ground rod after putting pyrocondensation protective casing.
As shown in Figure 9, in a preferred embodiment, heat-shrinkable T bush on the plastic pipe sleeve of having reserved is inserted to casing limit one by one concordant, use calorifier that heat-shrinkable T bush is carried out to pyrocondensation plastic tube and welding box body interface tube place;
As shown in figure 10, in a preferred embodiment, diameter on hand bottom landfill is about to the cobblestone of 10mm, exposes high-voltage connecting ground nail position and casing installation site.And, use 4 reserved and ground port of diameter 10mm cobblestone landfill hand well.
As shown in figure 11, after installing, use the cobblestone of about 10mm to carry out landfill to airhood lower horizontal line place; After completing, use connector box sealing cap to carry out shutoff the plastic tube in reserved well; Finally well lid is filled out to lid and the aboveground side of hand, completed engineering.
Adopt this programme advantage to be afterwards: to adopt three-layer sealed structure to increase the water resistance of fiber cable cross connection box, this comprises: the first sealing joint strip 1 and the 4th sealing joint strip 18 at case lid 17 frame places form one deck hermetically-sealed construction, the second sealing joint strip 2 and the 5th sealing joint strip 19 form one deck hermetically-sealed construction, the 3rd sealing joint strip 3 and the 6th sealing joint strip 20 form one deck hermetically-sealed construction, so, in the time that chamber door 4, case lid 17 are closed with box main body 5, the sealing joint strip pressing of contact position, inside edge or be interlocked, has increased the water resistance of fiber cable cross connection box.And, adopt waterproof cooling respirator 13, get rid of the inner condensation occurring of buried optical cable distribution box body, reduce the impact that megathermal climate brings underground communications facility, solved buried optical cable distribution box in hypsography low-lying area, the normal phase is subject to rainwater to soak the problem cannot normalization using; Adopt heat-shrinkable T bush that casing is put in to cable cable Guan Yuzi pipe outward and seal, extend shutoff point, increased operating flexibility; Fiber cable cross connection box is installed in conventional communication operations hand well, difference of elevation by two adjacent well is realized drain function, the drain function that has increased casing place well in operation, has solved buried optical cable distribution box in hypsography low-lying area, and the normal phase is subject to rainwater to soak the problem cannot normalization using.For mounting condition has been widened in the hidden construction of installation position selection, communications facility of fiber cable cross connection box, and the engineer operation in later stage can be carried out on ground.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320407246.1U CN203630401U (en) | 2013-07-09 | 2013-07-09 | Cross connecting cabinet for optical cable and communication well in operation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320407246.1U CN203630401U (en) | 2013-07-09 | 2013-07-09 | Cross connecting cabinet for optical cable and communication well in operation |
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| CN203630401U true CN203630401U (en) | 2014-06-04 |
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| CN201320407246.1U Expired - Lifetime CN203630401U (en) | 2013-07-09 | 2013-07-09 | Cross connecting cabinet for optical cable and communication well in operation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104834071A (en) * | 2015-06-01 | 2015-08-12 | 南京华脉科技股份有限公司 | Downhole optical cable cross-connecting box |
| CN106980161A (en) * | 2017-05-23 | 2017-07-25 | 浙江中奕通信技术有限公司 | A kind of buried fiber cable cross connection box |
| CN107920445A (en) * | 2017-12-18 | 2018-04-17 | 无锡优耐特能源科技有限公司 | A kind of special breather valve of outdoor cabinet babinet |
| CN109613668A (en) * | 2018-10-29 | 2019-04-12 | 中乐通信科技有限公司 | One kind can breathe waterproof cover structure |
| CN111355166A (en) * | 2020-04-01 | 2020-06-30 | 广东电网有限责任公司 | Waterlogging prevention terminal box |
-
2013
- 2013-07-09 CN CN201320407246.1U patent/CN203630401U/en not_active Expired - Lifetime
Cited By (7)
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| CN104834071A (en) * | 2015-06-01 | 2015-08-12 | 南京华脉科技股份有限公司 | Downhole optical cable cross-connecting box |
| CN104834071B (en) * | 2015-06-01 | 2018-03-30 | 南京华脉科技股份有限公司 | A kind of underground optical cable cross-connecting box |
| CN106980161A (en) * | 2017-05-23 | 2017-07-25 | 浙江中奕通信技术有限公司 | A kind of buried fiber cable cross connection box |
| CN107920445A (en) * | 2017-12-18 | 2018-04-17 | 无锡优耐特能源科技有限公司 | A kind of special breather valve of outdoor cabinet babinet |
| CN107920445B (en) * | 2017-12-18 | 2023-05-16 | 无锡优耐特能源科技有限公司 | Special breather valve of outdoor rack box |
| CN109613668A (en) * | 2018-10-29 | 2019-04-12 | 中乐通信科技有限公司 | One kind can breathe waterproof cover structure |
| CN111355166A (en) * | 2020-04-01 | 2020-06-30 | 广东电网有限责任公司 | Waterlogging prevention terminal box |
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Granted publication date: 20140604 |