CN2907018Y - Multi-branch directly buried cross link cable junction box - Google Patents
Multi-branch directly buried cross link cable junction box Download PDFInfo
- Publication number
- CN2907018Y CN2907018Y CN 200620091521 CN200620091521U CN2907018Y CN 2907018 Y CN2907018 Y CN 2907018Y CN 200620091521 CN200620091521 CN 200620091521 CN 200620091521 U CN200620091521 U CN 200620091521U CN 2907018 Y CN2907018 Y CN 2907018Y
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- box
- junction box
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- utility
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Abstract
The utility model relates to a direct-buried cross-linked cable multi-branch junction box, which comprises a box and at least three groups of three-phase cable joints in the box; A , B and C single-phase lines of two groups in the box are connected with one group of A0, B0 and C0 of the circumscribed transmission line respectively; an internal semi-conductive layer, a main insulating layer, an external semi-conductive layer and a copper shield are successively arranged on each single-phase line from the inner to the outer; an insulating internal sheath is arranged besides each group of three-phase line and the external connecting port of each group extract out of the box. The utility model is waterproof and damp proof and unaffected by the changes of external environmental factors, thereby is maintenance-free; The utility model significantly decreases the input and operation costs, omits the cable well and the plug-pull feeder box, contact firmly and can be used repeatedly for fifty years; the negative polarity DC voltage withstand is 37KV without flashover and breakdown in fifteen minutes; under ultra-low frequency, the withstand voltage is 36KV without flashover and breakdown in sixty minutes; so the utility model has good withstand voltage performance, stable and reliable, and can ensure power supply safe and reliable.
Description
Technical field
The utility model relates to the transmit electric power junction box of circuit of a kind of electric power system, relates in particular to a kind of direct burial crosslinked cable multiple-limb junction box, is that 6-10KV crosslinked cable branch connects first-selected auxiliary facility.
Background technology
What electric power system cable multiple-limb connected use in the past is that the underground cable well plugs the cable branch mode of connection that coupling box matches with the ground.Although described traditional cable branch connection mode is used till today always, once brought into play positive effect for the development electric utility, also exist such as cost height, investment manyly, take up room greatly; The connect-disconnect plug loose contact is subjected to the sensitivity that influences of ambient temperature, humidity variation, even also can therefore breaks down; Also often suffer damage of external force simultaneously, cause maintenance cost big, influence all unsatisfactory defectives such as power supply reliability, operating cost height.Though this causes the serious concerns of the parties concerned already, and drops into certain scientific research personnel and financial resources, make every effort to solve as early as possible.Can regrettably up to the present not see the report that successfully solves as yet.Cause electric power system to be had no way out day by day, traditional cable branch mode of connection of still continuing to use is year after year constructed.
The utility model content
The utility model is at above-mentioned problems of the prior art, provide a kind of long service life reusable, shorten cable laying length, increase the stand-by power supply input amount, waterproof and dampproof be not affected by the external environment non-maintaining, obviously reduce and drop into and operating cost, guarantee that power supply safety is reliable, be suitable for not collinear footpath is connected usefulness with the 6-10KV crosslinked cable of copper, aluminium material direct burial crosslinked cable multiple-limb junction box.
To achieve these goals, the technical solution of the utility model is as follows:
At least be provided with three groups of threephase cable joints by casing and Qi Nei and form, case the inner wherein two groups A, B, C phase line respectively with one group A of outer connection electric transmission line
0, B
0, C
0Link to each other, every single-phase transmission line outwards is provided with interior semi-conductive layer, main insulating layer, outer semiconducting layer, copper shield successively from the lining, also be provided with the insulation inner sheath outside every group of triple line, and the external connection end of each group is drawn outside the casing.
Described casing is a hollow closed stainless steel housing, be provided with the ring-type oversheath that exceeds above the casing and be complementary with the insulation inner sheath at the outlet of threephase cable joint, all be full of the insulating resin filler in its housing and between each phase line, reach concordant always with insulation inner sheath upper limb.
Described insulating resin filler is polyamide and 1: 1 preparation of epoxy resin.
The outer surface of described casing is compounded with epoxy coal tar pitch coating.
The utility model has the advantages of as follows:
The utility model compared with prior art, owing to adopted hollow closed stainless steel casing, outer surface has anticorrosive coat, all be full of insulating resin in it and between the phase line, in addition outer a series of technical measures of phase line and triple line and test the insulation characterisitic evidence of being done through Fushun electric company and have that waterproof and dampproof not influenced by the external environment factors vary non-maintaining; Obviously reduce and drop into and operating cost, save cable shaft and plug coupling box, contact firmly, reach useful life 50 years reusable; Negative polarity DC break down voltage 37KV15 minute not flashover does not puncture; The withstand voltage 35KV of industrial frequency AC, 1 minute not flashover do not puncture; 0.1HZ the withstand voltage 36KV of ultralow frequency, 60 minutes not flashover do not puncture, and are that good pressure-resistant performance is reliable and stable, can guarantee that power supply safety is reliable.The scope of application is wide simultaneously.
Description of drawings
Fig. 1 is a main TV structure schematic diagram of the present utility model.
Fig. 2 is branch joint and the external circuit joint schematic diagram that is connected to each other.
Among the figure, 1, single-phase transmission line, 2, interior semi-conductive layer, 3, main insulating layer, 4, outer semiconducting layer, 5, copper shield, 6, the insulating resin filler, 7, the insulation inner sheath, 8, oversheath, 9, epoxy coal tar pitch coating, 10, casing.
Embodiment
Embodiment
Embodiment of the present utility model is described in detail in conjunction with the accompanying drawings, casing 10 as shown in Figure 1 is the airtight hollow housings that processed from strand by the 1Cr18Ni9Ti corrosion resistant plate, at least be provided with three groups of threephase cable joints in the case, wherein two groups A, B, C phase line respectively with one group of corresponding A of outer connection electric transmission line
0, B
0, C
0Phase line links to each other, and as shown in Figure 2, these two groups is branch cable joint, draws from the oversheath 8 separately of casing 10 tops respectively; Every single-phase transmission line 1 in each group outwards is provided with semi-conductive layer 2, main insulating layer 3, outer semiconducting layer 4, copper shield 5 successively from the lining, every group of triple line also is provided with insulation inner sheath 7 outward and is complementary with oversheath 8, by insulation inner sheath 7 to casing 10 in, pour into insulating resin up to the top edge of the inner sheath 7 that insulate simultaneously, and enter between each phase line in the slit, leave standstill solidified in 6 hours after, casing 10 outer surfaces are with epoxide coal bituminous anticorrosive paint brushing one deck anticorrosive coat 9.Described insulating resin is polyamide and 1: 1 preparation of epoxy resin.Be connected with transmission line cable or branched line crimping by changeable aluminium hydraulic pressed connecting pipe during use.The branch connection case is imbedded underground.
Claims (4)
1, a kind of direct burial crosslinked cable multiple-limb junction box is characterized in that forming by being provided with three groups of threephase cable joints at least in casing (10) and its, case the inner wherein two groups A, B, C phase line respectively with one group A of outer connection electric transmission line
0, B
0, C
0Link to each other, every single-phase transmission line (1) outwards is provided with interior semi-conductive layer (2), main insulating layer (3), outer semiconducting layer (4), copper shield (5) successively from the lining, also be provided with insulation inner sheath (7) outside every group of triple line, the external connection end of each group is drawn outside the casing (10).
2, direct burial crosslinked cable multiple-limb junction box according to claim 1, it is characterized in that casing (10) is a hollow closed stainless steel housing, be provided with the ring-type oversheath (8) that exceeds above the casing and be complementary with insulation inner sheath (7) at the outlet of threephase cable joint, all be full of insulating resin filler (6) in its housing and between each phase line, reach concordant always with insulation inner sheath (7) upper limb.
3, direct burial crosslinked cable multiple-limb junction box according to claim 2 is characterized in that described insulating resin filler (6) is polyamide and 1: 1 preparation of epoxy resin.
4, direct burial crosslinked cable multiple-limb junction box according to claim 1 and 2 is characterized in that the outer surface of described casing (10) is compounded with epoxy coal tar pitch coating (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620091521 CN2907018Y (en) | 2006-06-13 | 2006-06-13 | Multi-branch directly buried cross link cable junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620091521 CN2907018Y (en) | 2006-06-13 | 2006-06-13 | Multi-branch directly buried cross link cable junction box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2907018Y true CN2907018Y (en) | 2007-05-30 |
Family
ID=38115663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620091521 Expired - Fee Related CN2907018Y (en) | 2006-06-13 | 2006-06-13 | Multi-branch directly buried cross link cable junction box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2907018Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105097091A (en) * | 2015-09-11 | 2015-11-25 | 湖南华菱线缆股份有限公司 | Medium-pressure prefabricated branch cable and manufacturing method thereof |
| US11418129B2 (en) | 2017-11-20 | 2022-08-16 | Solaredge Technologies Ltd. | Providing positional awareness information and increasing power quality of parallel connected inverters |
-
2006
- 2006-06-13 CN CN 200620091521 patent/CN2907018Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105097091A (en) * | 2015-09-11 | 2015-11-25 | 湖南华菱线缆股份有限公司 | Medium-pressure prefabricated branch cable and manufacturing method thereof |
| US11418129B2 (en) | 2017-11-20 | 2022-08-16 | Solaredge Technologies Ltd. | Providing positional awareness information and increasing power quality of parallel connected inverters |
| EP3487059B1 (en) * | 2017-11-20 | 2024-03-13 | Solaredge Technologies Ltd. | Providing positional awareness information and increasing power quality of parallel connected inverters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |