CN203813397U - Middle voltage power cable middle joint vertical water stopping device - Google Patents
Middle voltage power cable middle joint vertical water stopping device Download PDFInfo
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- CN203813397U CN203813397U CN201420253541.0U CN201420253541U CN203813397U CN 203813397 U CN203813397 U CN 203813397U CN 201420253541 U CN201420253541 U CN 201420253541U CN 203813397 U CN203813397 U CN 203813397U
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Abstract
The utility model relates to a middle voltage power cable middle joint vertical water stopping device, which can be used to solve the problem that the conventional middle voltage power cable middle joints are not provided with the vertical water stopping function. According to the utility model, copper mesh grids are adopted to recover the cable copper shield of the joint parts, and copper braided belts are adopted to recover the cable steel armor of the joint parts; butt joint pipes are adopted to realize the conductor connection, and stress cones are adopted to recover the connection between the inner/outer semiconductive layers and the insulation layers, and at the same time, first waterproof sleeves, second waterproof sleeves, and three finger sleeves can be adopted to realize the three-layer vertical water stopping function, and in addition, the waterproof layers are connected together in a closed manner, and the outer sides of the copper braided belts are provided with the copper mesh grid layer and the armor additional layer, and therefore the copper shield and the armor layer of the cable can be recovered. The middle voltage power cable middle joint vertical water stopping device is suitable for being used as the water stopping device of the middle voltage power cable middle joint.
Description
Technical field
The present invention relates to a kind of medium-pressure power cable transition joint longitudinal water-blocking device.
Background technology
10kV and the transition joint of 20kV medium-pressure power cable all do not possess longitudinal water-blocking ability both at home and abroad at present, in production practices, exist the power cable of a large amount of directly buried installations because of its oversheath, to have the reasons such as bad point or breakage to cause in cable body intaking, entering moisture in cable body infiltrates or flows in cable intermediate joint and cause the gradual joint faults such as cable intermediate joint insulation property reduce, water tree is aging, partial discharge is serious, discharge in insulation punctures along cable body, the generation of the accident that causes power failure, has affected power supply quality and power supply reliability greatly.In the 10kV cable intermediate joint fault that Harbin electric company occurs in recent years, because the cable intermediate joint fault that longitudinally water inlet causes accounts for 50% left and right, especially higher in the failure rate of the longitudinal water inlet of cable intermediate joint in rainy season, be therefore badly in need of solving the problem of the longitudinal water inlet of cable intermediate joint.
Summary of the invention
The utility model is all not possess the problem of longitudinal water-blocking ability in order to solve existing medium-pressure power cable transition joint, has proposed a kind of medium-pressure power cable transition joint longitudinal water-blocking device.
Medium-pressure power cable transition joint longitudinal water-blocking device described in the utility model, medium-pressure power cable comprises three-phase conducting wire core, three main insulating layers, three semi-conductive layers, three copper shields, sheath, armour and oversheaths; Three main insulating layers are coaxially coated on respectively the outside of three-phase conducting wire core; Three semi-conductive layers are coaxially coated on respectively the outside of three main insulating layers; Three copper shields are coaxially coated on respectively the outside of three semi-conductive layers; Sheath is coated on the outside of three copper shields; Armour is coated on the outside of sheath;
This waterproofing device comprises two copper braid over braids, two constant force springs, two the first waterproof jackets, two the second waterproof jackets, two tri-finger stalls, three butt tubes, three stress cones, three copper mesh grids, the 3rd watertight composition, pressure welding case, copper mesh layers and armouring extra plays;
Three butt tubes are socketed in respectively the outside of the three-phase conducting wire core joint of two cables, three stress cones are socketed in respectively the outside of three semi-conductive layer joints of two cables, three copper mesh grids are wrapped in respectively the outside of three copper shield joints of two cables, the 3rd watertight composition is coated on the outside of three copper mesh grids, and three copper mesh grids are coated as a whole; Two tri-finger stalls are enclosed within respectively on the three-phase conducting wire core of two cables, and one end of two tri-finger stalls respectively with two airtight connections of the second waterproof jacket, two tri-finger stall other ends respectively with three copper shields sealings of the three-phase conducting wire core of two cables; Two constant force springs are socketed in respectively the outside of two armature of cable layers, and one end of two copper braid over braids is crimped on respectively in two constant force springs, and the other end of two copper braid over braids is fixedly connected with by pressure welding case;
Two the first waterproof jackets are respectively by the sheath of two cables, armour and constant force spring sealing; Two the second waterproof jackets are enclosed within respectively the outside of two the first waterproof jackets;
Copper mesh layers will be coated on the outside of two the first waterproof jackets and two copper braid over braids;
Armouring extra play is coated on the outside of copper mesh watertight composition.
The utility model first carries out stripping by the cable of joint in actual applications, as shown in Figure 1, the utility model adopts copper mesh grid to recover joint cable of copper shield, adopt copper braid over braid to recover joint Steel armor of cable, adopting butt tube to realize conductor connects, the connection of partly leading inside and outside employing stress cone recovers and insulating adopts the first waterproof jacket simultaneously, the second waterproof jacket and tri-finger stall are realized the longitudinal water-blocking of three layers, and all airtight connections between watertight composition, avoided moisture content reverse osmosis problem, and at arranged outside copper mesh layers and the armouring extra play of copper braid over braid, copper shield and the armour of cable have been recovered, effectively solve existing medium-pressure power cable transition joint and all do not possessed the problem of longitudinal water-blocking ability, effectively improved longitudinal waterproof ability of medium-pressure power cable transition joint, and compare with existing medium-pressure power cable intermediate joint device, longitudinally waterproof ability has improved 20% on year-on-year basis.
Accompanying drawing explanation
Fig. 1 is the cable stripping schematic diagram of joint;
Fig. 2 is the mounting structure schematic diagram of medium-pressure power cable transition joint longitudinal water-blocking device described in the utility model;
Fig. 3 is copper braid over braid 8 described in embodiment one and the installation site schematic diagram of constant force spring 9;
Fig. 4 is the installation site schematic diagram of the first waterproof jacket 10 described in embodiment one;
Fig. 5 is the installation site schematic diagram of the second waterproof jacket 11 described in embodiment one;
Fig. 6 is the installation site schematic diagram of the fingerstall 12 described in embodiment one;
Fig. 7 is the installation site schematic diagram of the adapter 13 described in embodiment one.
Embodiment
Embodiment one, in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, present embodiment is described, medium-pressure power cable transition joint longitudinal water-blocking device described in present embodiment, medium-pressure power cable comprises three-phase conducting wire core 1, three main insulating layers 2, three semi-conductive layers 3, three copper shields 4, sheath 5, armour 6 and oversheaths 7; Three main insulating layers 2 are coaxially coated on respectively the outside of three-phase conducting wire core 1; Three semi-conductive layers 3 are coaxially coated on respectively the outside of three main insulating layers 2; Three copper shields 4 are coaxially coated on respectively the outside of three semi-conductive layers 3; Sheath 5 is coated on the outside of three copper shields 4; Armour 6 is coated on the outside of sheath 5;
This waterproofing device comprises two 2 copper braid over braids 8, two constant force springs 9, two the first waterproof jackets 10, two the second waterproof jackets 11, two tri-finger stalls 12, three butt tubes 13, three stress cones 14, three copper mesh grids 15, the 3rd watertight composition 16, pressure welding case 17, copper mesh layers 18 and armouring extra plays 19;
Three butt tubes 13 are socketed in respectively the outside of three-phase conducting wire core 1 joint of two cables, three stress cones 14 are socketed in respectively the outside of three semi-conductive layer 3 joints of two cables, three copper mesh grids 15 are wrapped in respectively the outside of three copper shield 4 joints of two cables, the 3rd watertight composition 16 is coated on the outside of three copper mesh grids 15, and three copper mesh grids 15 are coated as a whole; Two tri-finger stalls 12 are enclosed within respectively on the three-phase conducting wire core 1 of two cables, and one end of two tri-finger stalls respectively with two second waterproof jacket 11 is airtight is connected, two tri-finger stall other ends respectively with three copper shields, 4 sealings of the three-phase conducting wire core 1 of two cables; Two constant force springs 9 are socketed in respectively the outside of two armature of cable layers 6, and one end of two copper braid over braids 8 is crimped on respectively in two constant force springs 9, and the other end of two copper braid over braids 8 is fixedly connected with by pressure welding case 17;
Two the first waterproof jackets 10 are respectively by the sheath of two cables 5, armour 6 and constant force spring 9 sealings; Two the second waterproof jackets 11 are enclosed within respectively the outside of two the first waterproof jackets 10;
Copper mesh layers 18 will be coated on the outside of two the first waterproof jackets 10 and two copper braid over braids 8;
Armouring extra play 19 is coated on the outside of copper mesh watertight composition 18.
Embodiment two, present embodiment are to the further illustrating of the medium-pressure power cable transition joint longitudinal water-blocking device described in embodiment one, and the first waterproof jacket 10, the second waterproof jacket 11 and fingerstall 12 all adopt adhesive waterproof tape solderless wrapped connection to realize.
Demand size stripping (shown in Fig. 1) is pressed respectively in the cable two ends of preparing making cable intermediate joint, by copper braid over braid and constant force spring or copper wire tighten for armour, centered by oversheath and armour breakpoint place by oversheath, armour, inner sheath intersects and repeatedly walks around the space between threephase cable with adhesive waterproof tape, hook into the first waterproof jacket (the first longitudinal water-blocking layer), then use shrinkage waterproof the second waterproof jacket (the second longitudinal water-blocking layer) longitudinally through threephase cable, cover wraps in the first waterproof jacket outside, the copper shield lap-joint of the second waterproof jacket and threephase cable is wound around to multilayer repeatedly and wraps up tight fingerstall (the 3rd longitudinal water-blocking layer), then in the crimping that completes two ends triple line core conductor, recovering conductor connects, the connection of partly leading and insulating inside and outside the stress cone of cover shrinkage recovers, the connection that the mesh grid of cover copper recovers copper shield, the threephase cable that has recovered copper shield is tightly wound around to multilayer with adhesive waterproof tape and covers the second waterproof, then by both sides copper braid over braid pressing tongs crimping, copper braid over braid and cable body are covered to each 80mm place, copper braid over braid both sides with three layers of adhesive waterproof tape winding parcels, finally with armoring tape, be wound around three layers of parcels and all cover adhesive waterproof tape, longitudinal water-blocking cable transition joint is made complete.
Claims (2)
1. medium-pressure power cable transition joint longitudinal water-blocking device, medium-pressure power cable comprises three-phase conducting wire core (1), three main insulating layers (2), three semi-conductive layers (3), three copper shields (4), sheath (5), armour (6) and oversheath (7); Three main insulating layers (2) are coaxially coated on respectively the outside of three-phase conducting wire core (1); Three semi-conductive layers (3) are coaxially coated on respectively the outside of three main insulating layers (2); Three copper shields (4) are coaxially coated on respectively the outside of three semi-conductive layers (3); Sheath (5) is coated on the outside of three copper shields (4); Armour (6) is coated on the outside of sheath (5);
It is characterized in that, this waterproofing device comprises two copper braid over braids (8), two constant force springs (9), two the first waterproof jackets (10), two the second waterproof jackets (11), two tri-finger stalls (12), three butt tubes (13), three stress cones (14), three copper mesh grids (15), the 3rd watertight composition (16), pressure welding case (17), copper mesh layers (18) and armouring extra play (19);
Three butt tubes (13) are socketed in respectively the outside of three-phase conducting wire core (1) joint of two cables, three stress cones (14) are socketed in respectively the outside of three semi-conductive layers (3) joint of two cables, three copper mesh grids (15) are wrapped in respectively the outside of three copper shields (4) joint of two cables, the 3rd watertight composition (16) is coated on the outside of three copper mesh grids (15), and three copper mesh grids (15) are coated as a whole; Two tri-finger stalls (12) are enclosed within respectively on the three-phase conducting wire core (1) of two cables, and one end of two tri-finger stalls respectively with airtight connection of two the second waterproof jackets (11), two tri-finger stall other ends respectively with three copper shields (4) sealing of the three-phase conducting wire core (1) of two cables; Two constant force springs (9) are socketed in respectively the outside of two armature of cable layers (6), one end of two copper braid over braids (8) is crimped on respectively in two constant force springs (9), and the other end of two copper braid over braids (8) is fixedly connected with by pressure welding case (17);
Two the first waterproof jackets (10) are respectively by the sheath of two cables (5), armour (6) and constant force spring (9) sealing; Two the second waterproof jackets (11) are enclosed within respectively the outside of two the first waterproof jackets (10);
Copper mesh layers (18) will be coated on the outside of two the first waterproof jackets (10) and two copper braid over braids (8);
Armouring extra play (19) is coated on the outside of copper mesh watertight composition (18).
2. medium-pressure power cable transition joint longitudinal water-blocking device according to claim 1, is characterized in that, the first waterproof jacket (10), the second waterproof jacket (11) and fingerstall (12) all adopt adhesive waterproof tape solderless wrapped connection to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253541.0U CN203813397U (en) | 2014-05-16 | 2014-05-16 | Middle voltage power cable middle joint vertical water stopping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253541.0U CN203813397U (en) | 2014-05-16 | 2014-05-16 | Middle voltage power cable middle joint vertical water stopping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203813397U true CN203813397U (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420253541.0U Expired - Fee Related CN203813397U (en) | 2014-05-16 | 2014-05-16 | Middle voltage power cable middle joint vertical water stopping device |
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| Country | Link |
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| CN (1) | CN203813397U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429224A (en) * | 2018-04-11 | 2018-08-21 | 江苏中天科技电缆附件有限公司 | A kind of novel extra large land cable crossover sub |
| CN108429225A (en) * | 2018-05-14 | 2018-08-21 | 苏州思在科技有限公司 | Cable connector protection sleeve pipe with safeguard function |
| CN111640534A (en) * | 2020-05-07 | 2020-09-08 | 李建华 | Self-hardening waterproof rubber sheath for ship electric wire |
-
2014
- 2014-05-16 CN CN201420253541.0U patent/CN203813397U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429224A (en) * | 2018-04-11 | 2018-08-21 | 江苏中天科技电缆附件有限公司 | A kind of novel extra large land cable crossover sub |
| CN108429225A (en) * | 2018-05-14 | 2018-08-21 | 苏州思在科技有限公司 | Cable connector protection sleeve pipe with safeguard function |
| CN111640534A (en) * | 2020-05-07 | 2020-09-08 | 李建华 | Self-hardening waterproof rubber sheath for ship electric wire |
| CN111640534B (en) * | 2020-05-07 | 2021-08-31 | 四川道弘新材料有限公司 | Self-hardening waterproof rubber sheath for ship electric wire |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 |