CN209674977U - Urban distribution network power supply system 10kV cable - Google Patents

Abstract

The utility model discloses a kind of urban distribution network power supply system 10kV cables, including the identical insulated wire cores of quantity and hollow flexible copper tubing, water blocking yarn is filled in gap between the two after insulated wire cores and hollow flexible copper tubing rely closely, then with the wrapped composition cable core of the twining package tape that blocks water；Polyethylene inner sheath is extruded outside cable core, the wrapped armor outside polyethylene inner sheath extrudes double sheaths outside armor, and the internal layer of double sheaths is high density polyethylene (HDPE) sheath, and outer layer is environmental protection polyvinyl chloride sheath.The utility model increases cable shield short-circuit current paths, reach the capacity for increasing cable shield short circuit current, while passing through the hollow structure of hollow flexible copper tubing, forms air flow passage and exchanged with external world's progress heat, reaching reduces cable internal temperature, increases current-carrying capacity of cable；The utility model cable has bigger shielding short circuit current and current-carrying capacity under the premise of same section, and effect is obvious, and quality is more excellent.

Description

Urban distribution network power supply system 10kV cable

Technical field

The utility model relates to wire and cable fields, and in particular to a kind of urban distribution network power supply system high-quality electricity of 10kV Cable.

Background technique

What is generated when cable is powered by cable metallic screens is electromagnetic-field-shielded in insulated wire cores, to reduce to extraneous electricity Magnetic disturbance, while the failed shorted electric current in the scope of design of system generation is safely introduced into earthed system, protect power supply system Safe operation；Cable metallic screens not only play the role of electrostatic screen, also act conducting failure electric current, no matter The section of manufacture link all exactissima diligentia metallic shields of the type selecting and cable of cable meets short-circuit current capability；

With the continuous development of urban distribution network, the extension of city cable route, power supply system capacity of short circuit level gradually increases Greatly；When shorted to earth occurs for cable, short circuit current is also increasing；When generating system short circuit, cable metal is often burnt out Shielded layer or damage cable insulation, the case where causing cable to be scrapped；Above-mentioned performance is to be improved.

Utility model content

The purpose of this utility model is to provide a kind of urban distribution network power supply system 10kV quality cables, in same section Under the premise of have bigger shielding short circuit current and current-carrying capacity, greatly avoid and cause short circuit when power supply system breaks down When, the case where burning out cable metallic screens layer or damage cable insulation, cable caused to be scrapped.

To achieve the above object, the utility model provides the following technical solutions: a kind of urban distribution network power supply system 10kV Cable, including the identical insulated wire cores of quantity and hollow flexible copper tubing, after insulated wire cores and hollow flexible copper tubing rely closely Water blocking yarn is filled in gap between the two, then with the wrapped composition cable core of the twining package tape that blocks water；It extrudes in polyethylene and protects outside cable core Set, weaves armor outside polyethylene inner sheath, and double sheaths are extruded outside armor, and the internal layer of double sheaths is high-density polyethylene Alkene sheath, outer layer are environmental protection polyvinyl chloride sheath.

Preferably, the insulated wire cores are extruded in conductor shield, insulating layer, insulation outside conductor by conductor, successively Shielded layer and the copper strip shielding layer outside insulation screen are constituted.

Preferably, the hollow flexible copper tubing is the hollow seamless ripple purple flexible copper tubing that inner wall is coated with protective coating, described Protective coating be silicone oil.

Preferably, the armor is double galvanized steel strip armors.

Preferably, the conductor presses for 105%IACS annealing copper wire and is twisted.

Preferably, the insulating layer is prepared by high-purity water resistant tree-shaped crosslinked polyethylene material.

Preferably, the conductor shield is prepared by ultra-smooth shielding material.

Preferably, the insulation screen is prepared by ultra-smooth insulation shielding material.

Compared with prior art, the utility model has the beneficial effects that

It is short that the utility model by the copper strip shielding layer of core increases cable shield with the hollow flexible copper tubing to rely closely Road current path reaches the capacity for increasing cable shield short circuit current；The hollow structure for passing through hollow flexible copper tubing simultaneously is formed empty Flow of air channel carries out heat with the external world and exchanges, and reaching reduces cable internal temperature, increases current-carrying capacity of cable；In same section Under the premise of have bigger shielding short circuit current and current-carrying capacity, greatly avoid when power supply system break down cause short circuit when, The case where burning out cable metallic screens layer or damage cable insulation, cable caused to be scrapped.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.

Embodiment 1:

Referring to Fig. 1, a kind of urban distribution network power supply system 10kV cable provided by the utility model, including three identical Insulated wire cores 1-1 and hollow flexible copper tubing 1-2, insulated wire cores 1-1 be extruded in outside conductor 1-1-1 by conductor 1-1-1, successively Conductor shield 1-1-2, insulating layer 1-1-3, insulation screen 1-1-4 and the copper strips screen outside insulation screen Layer 1-1-5 is covered to constitute；

The hollow flexible copper tubing is the hollow seamless ripple purple flexible copper tubing 1-2-1 that inner wall is coated with protective coating 1-2-2, described Protective coating be silicone oil；

Water blocking yarn 1-3 is filled in gap between the two after insulated wire cores and hollow flexible copper tubing rely closely, then uses The wrapped composition cable core 1 of the twining package tape 1-4 that blocks water；Polyethylene inner sheath 2 is extruded outside cable core, the wrapped armouring outside polyethylene inner sheath Layer 3, armor extrude double sheaths 4 using double galvanized steel strip armors outside armor, and the internal layer of double sheaths is poly- for high density Ethylene sheath 4-1, outer layer are environmental protection polyvinyl chloride sheath 4-2；

The conductor presses for 105%IACS annealing copper wire to be twisted, and the insulating layer is handed over by high-purity water resistant tree-shaped Connection polyethylene material be prepared, the conductor shield by ultra-smooth shielding material be prepared, the insulation screen by Ultra-smooth insulation shielding material is prepared.

Embodiment 2:

According to the utility model, 24 diameters which selects Yixing Yida Copperwire Co., Ltd. to produce are 2.60mm 105%IACS anneal copper wire, press into 120 squares of cable conductors through JKL630-54 type frame winch is twisted, use Nanjing skill work The 0+3 three-layer co-extruded cross-linking unit of equipment Co., Ltd production carries out conductor shield, insulating layer, insulation screen primary Property squeeze out；Insulation Material is Tao Shi HFDC-4202EC water resistant tree cross-linked polyethylene insulating material, and insulating layer average thickness is 4.5mm, partially Heart degree is 4%；Conductor shielding material and insulation shielding material are that the shielding of Borealis LE0592s ultra-smooth is expected；The average thickness of conductor shield Degree is 0.8mm, and insulation screen average thickness is 0.8mm；The long a height of 15000mm*5000mm* of * wide * is placed on after three-layer co-extruded In 5000mm drying box, after placing degasification in 48 hours in the case where 60 degree of temperature, with the copper belt of 0.10mm thickness 40mm wide, take Core is made after carrying out wrapped shielding in lid rate 15%；

The Shandong macro metal science and technology of brocade for uniformly smearing with silicone oil inner wall with three with three cores obtained above is limited Company production outer diameter be 10mm with a thickness of 0.12mm hollow seamless ripple purple flexible copper tubing and water blocking yarn waterstop it is wrapped into The cable core of row stranding；The copper strips of core relies closely with hollow seamless ripple purple flexible copper tubing；Cable-former used is that Hefei is closed rather The JL-1600 type cable-former of electrical equipment Co., Ltd production；The silicone oil is the production of Shanghai Heng Yue Fine Chemical Co., Ltd HS-181 type silicone oil；The water blocking yarn and waterstop is the water blocking yarn of Yangzhou Tengfei Cable And Electric Appliance Material Co., Ltd's production With waterstop；

Jilin stone is extruded outside cable core obtained above with the SJ-150 extruding machine that Yixing City south technical machinery factory manufactures Change shield in high density polyethylene (HDPE)；Armouring is carried out in the bis- steel bands of 0.5 mm of the wide 60mm thickness of sheath external application, armouring gap is not more than 50%；Extrude the ring of Jilin Petrochemical high density polyethylene (HDPE) sheath and Jiangsu Xinfeng Plastic Industry Co., Ltd.'s production respectively outside armor Guarantor's type pvc sheath；

The cable of above-mentioned production is detected, the cable conductor DC resistance is 0.145 Ω/km at 20 degree, is better than state 1 kV (kV of Um=1.2) to 35 kV (kV of Um=40.5) extruded insulation electric power of family's standard GB/T12706.2-2008 voltage rating Cable and attachment part 2: 6 kV of voltage rating (kV of Um=7.2) to 30 kV (kV of Um=36) cable " as defined in 0.153 Ω/ km；Amplitude reaches 5 percent points two；

To the cable carry out the test of shielded layer short circuit current: test electric current 3911A, short circuit duration 1 second, copper strips initial temperature 67 degree, 81.6 degree of temperature after copper strips short circuit；Than according to " 1 (Um=1.2 kV of voltage rating standard GB/T/T12706.2-2008 KV) to 35 kV (kV of Um=40.5) extrusion insulating power cable and attachment part 2: 6 kV of voltage rating (kV of Um=7.2) is arrived 30 kV (kV of Um=36) cable " and IEC60949 " calculating for considering the permissible short circuit current of nonadiabatic effect " criterion calculation Cable metallic screens short-circuit current capability 3000A greatly go out 911A, about 30%.

To the cable, remaining performance is detected, and remaining performance meets national standard GB/T12706.2-2008 " voltage rating 1 KV (kV of Um=1.2) is to 35 kV (kV of Um=40.5) extrusion insulating power cable and attachment part 2: 6 kV (Um of voltage rating =7.2 kV) to 30 kV (kV of Um=36) cable ".

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

Claims (8)

1. a kind of urban distribution network power supply system 10kV cable, it is characterised in that: including the identical insulated wire cores of quantity and in Water blocking yarn is filled in empty flexible copper tubing, the gap between the two after insulated wire cores and hollow flexible copper tubing rely closely, then with hindering The wrapped composition cable core of water twining package tape；Polyethylene inner sheath is extruded outside cable core, the wrapped armor outside polyethylene inner sheath, in armour Double sheaths are extruded outside dress layer, the internal layer of double sheaths is high density polyethylene (HDPE) sheath, and outer layer is environmental protection polyvinyl chloride sheath.

2. urban distribution network power supply system 10kV cable according to claim 1, it is characterised in that: the insulated wire cores By conductor, successively it is extruded in conductor shield outside conductor, insulating layer, insulation screen and outside insulation screen Copper strip shielding layer constitute.

3. urban distribution network power supply system 10kV cable according to claim 1, it is characterised in that: the hollow soft copper Pipe is the hollow seamless ripple purple flexible copper tubing that inner wall is coated with protective coating, and the protective coating is silicone oil.

4. urban distribution network power supply system 10kV cable according to claim 1, it is characterised in that: the armor is Double galvanized steel strip armors.

5. urban distribution network power supply system 10kV cable according to claim 2, it is characterised in that: the conductor is 105% IACS annealing copper wire, which presses, to be twisted.

6. urban distribution network power supply system 10kV cable according to claim 2, it is characterised in that: the insulating layer by High-purity water resistant tree-shaped crosslinked polyethylene material is prepared.

7. urban distribution network power supply system 10kV cable according to claim 2, it is characterised in that: the conductor shielding Layer is prepared by ultra-smooth shielding material.

8. urban distribution network power supply system 10kV cable according to claim 2, it is characterised in that: the insulation shielding Layer is prepared by ultra-smooth insulation shielding material.