CN105575533B

CN105575533B - Radiate oil-filled cable

Info

Publication number: CN105575533B
Application number: CN201510531796.8A
Authority: CN
Inventors: 何鹏举
Original assignee: Enshi Jie Rui Electric Power Engineering Co Ltd
Current assignee: Enshi Jie Rui Electric Power Engineering Co., Ltd.
Priority date: 2015-08-27
Filing date: 2015-08-27
Publication date: 2017-11-03
Anticipated expiration: 2035-08-27
Also published as: CN107274994A; CN107274994B; CN107068283B; CN105575533A; CN107068283A

Abstract

The present invention relates to one kind radiating oil-filled cable, this radiating oil-filled cable includes wire stylet, inner protective layer, insulation oil reservoir and external protection；The inner protective layer is wrapped in the outside of each wire stylet respectively, and each wire stylet, which is screwed up, to be arranged on after winding in the insulation oil reservoir, has external protection in the outer wrap of the insulation oil reservoir；The radiating tube extended along the wire stylet is fixed with the outer wall of the external protection, the radiating tube includes hollow tube wall, and the hollow tube wall is connected with the insulation oil reservoir；Insulating oil is filled with the insulation oil reservoir and the hollow tube wall；The two ends of the radiating tube are basseted and the height at two ends is different；The construction of cable is novel, can effectively prevent cable internal air gap from producing, while having good radiating effect, can effectively reduce cable because overheating breakdown probability.

Description

Radiate oil-filled cable

Technical field

It is a kind of oil-filled cable particularly the present invention relates to a kind of cable.

Background technology

The similar rope of profile of cable, is typically to be formed by multigroup wire stranding, mutually insulated between every group of wire, and often It is twisted into around a center, whole outside is surrounded by the coating of high-insulation；It is be erected in the air or mounted in underground, the bottom more, For telecommunication or power Transmission；In order to ensure the normal, stably of cable work, often in the cable filled with insulating oil, it can have Effect eliminates the air gap produced in insulating barrier by load variations, so as to improve the work field strength of cable；Due to the fuel factor of electric current, Cable can produce amount of heat when long-time is used, and this will cause cable temperature rise, and too high temperature accelerates insulating barrier Aging, so that insulating barrier is breakdown；Particularly during the broiling summer, cable is easier to break down；Meanwhile, traditional is oil-filled The construction of cable not science, insulation oil reservoir can hinder the heat spreader inside cable, easily make cable accumulated inside amount of heat, Cable temperature is further lifted, accelerates the aging of cable covering, so as to increase the probability that cable breaks down.

The content of the invention

In view of the above-mentioned problems, the present invention provides a kind of radiating oil-filled cable, the construction of cable is novel, can effectively prevent electricity Cable internal air gap is produced, while having good radiating effect, can effectively reduce cable because overheating breakdown probability.

To solve the above problems, the technical solution adopted in the present invention is：This radiating oil-filled cable includes wire stylet, interior Protective layer, insulation oil reservoir and external protection；The inner protective layer is wrapped in the outside of each wire stylet, each wire respectively Core, which is screwed up, to be arranged on after winding in the insulation oil reservoir, has external protection in the outer wrap of the insulation oil reservoir；Described outer The radiating tube extended along the wire stylet is fixed with the outer wall of protective layer, the radiating tube includes hollow tube wall, the sky Heart tube wall is connected with the insulation oil reservoir；Insulating oil is filled with the insulation oil reservoir and the hollow tube wall；It is described to dissipate The two ends of heat pipe are basseted and the height at two ends is different.

The beneficial effects of the invention are as follows：The two ends of radiating tube are basseted and the height at two ends is different, according to hydrodynamics Understand, the port wind speed of high order end is larger, therefore the air-flow in radiating tube can flow out from high order end；Simultaneously because surface temperature compared with Air pressure is relatively low at height, low order end, and gas can be poured into from low order end；Therefore it there are all the time from low order end in radiating tube and flow to a high position The radiating airflow at end；The operation principle of the radiating tube can analogy stack effect；Radiating airflow from radiating tube during flowing out The heat of hollow tube wall interior insulation oil can be taken away, therefore insulating oil heat release, cooling in hollow tube wall；Insulating oil is right by heat Stream effect, which constantly conducts the heat in oil-filled cable to radiating tube, to be lost, so as to realize the real-time radiating of oil-filled cable.

Compared to traditional oil-filled cable, heat abstractor is placed in Exterior cable by this radiating oil-filled cable, does not result in electricity The air breakdown electric discharge of cable, therefore overall structure is safer；Radiating tube in the present invention is close to external protection, Stability Analysis of Structures and not Larger volume is taken, difficulty of construction will not be increased；Further, since there is the oil storage space of hollow tube wall, cable is expanding with heat and contract with cold When insulating oil can more in time, it is sufficient be supplemented in cable, so as to further prevent the generation of air gap, further improve cable Security.

Preferably, the low order end of the radiating tube is placed in earth's surface, high order end upwardly extend and be higher than 15 meters of low order end with On；Low order end is located at earth's surface, and port temperature is higher, and high order end is located at overhead, and temperature is relatively low, in order to form radiating tube two ends Larger draught head, so as to promote the flow at high speed of radiating airflow in radiating tube.

As further preferred, moistureproof net is separately installed with the low order end and the high order end；In order to obstruct rain Water, steam enter radiating tube, so as to keep the drying in radiating tube.

Preferably, the annular impeller coaxial with the radiating tube, the annular are mounted equidistant in the radiating tube Impeller can be relative to radiating tube around own axis；During circumferential wave wheel is rotated, the annular impeller dissipates with described Heat pipe remains oil sealing state；Moving tooth equidistantly is fixed with the outer ring surface of the annular impeller, in the annular impeller Equidistantly guide vane is fixed with inner ring surface.

Brief description of the drawings

Fig. 1 is the structural representation of this radiating oil-filled cable one embodiment.

Fig. 2 is the end face mplifying structure schematic diagram of cable in embodiment illustrated in fig. 1.

Embodiment

In the embodiment shown in Fig. 1, Fig. 2, this radiating oil-filled cable includes wire stylet 1, inner protective layer 2, insulating oil Layer 3 and external protection 4；The inner protective layer 2 is wrapped in the outside of each wire stylet 1 respectively, and each wire stylet 1, which is screwed up, to be twined It is arranged on around rear in the insulation oil reservoir 3, has external protection 4 in the outer wrap of the insulation oil reservoir 3；In the external protection The radiating tube 5 extended along the wire stylet 1 is fixed with 4 outer wall, the radiating tube 5 includes hollow tube wall 51, the sky Heart tube wall 51 is connected with the insulation oil reservoir 3；Insulating oil is filled with the insulation oil reservoir 3 and the hollow tube wall 51； The two ends of the radiating tube 5 are basseted and the height at two ends is different；The low order end 52 of the radiating tube 5 is placed in earth's surface, high-order End 53 is upwardly extended and higher than 52 20 meters of low order end；Moistureproof net is separately installed with the low order end 52 and the high order end 53 54；The annular impeller 6 coaxial with the radiating tube 5 is mounted equidistant in the radiating tube 5, the annular impeller 6 can be relative In radiating tube 5 around own axis；During annular impeller 6 is rotated, the annular impeller 6 begins with the radiating tube 5 Oil sealing state is kept eventually；Moving tooth 61 equidistantly is fixed with the outer ring surface of the annular impeller 6, in the annular impeller 6 Equidistantly guide vane 62 is fixed with anchor ring.

The two ends of radiating tube 5 are basseted and the height at two ends is different, it can be seen from hydrodynamics, the port of high order end 53 Wind speed is larger, therefore the air-flow in radiating tube 5 can flow out from high order end 53；Simultaneously because surface temperature is higher, at low order end 52 Air pressure is relatively low, and gas can be poured into from low order end 52；Therefore it there are all the time from low order end 52 in radiating tube 5 and flow to high order end 53 Radiating airflow；The operation principle of the radiating tube 5 can analogy stack effect, high order end 53 is than low order end 52 high 20 in the present embodiment Rice, therefore swiftly flowing radiating airflow can be produced in radiating tube 5；Radiating airflow meeting during being flowed out from radiating tube 5 The heat of the hollow interior insulation of tube wall 51 oil is taken away, promotes insulating oil heat release, the cooling in hollow tube wall 51；Insulating oil passes through heat Convection action, which constantly conducts the heat in oil-filled cable to radiating tube 5, to be lost, so as to realize dissipating in real time for oil-filled cable Heat；In addition, swiftly flowing radiating airflow promotes the moving tooth 61 on the annular quick rotation of impeller 6, the annular outer ring surface of impeller 6 The insulating oil in hollow tube wall 51 is constantly stirred, and then promotes the cold and hot exchange of insulating oil, accelerates the radiating effect of insulating oil.

Moistureproof net 54 in the present embodiment installed in the two ends of radiating tube 5 can effectively obstruct rainwater into radiating tube 5, keep The drying of radiating tube 5, so as to extend the whole service life of cable.

Compared to traditional oil-filled cable, this radiating oil-filled cable effectively increases the radiating of cable using stack effect； Heat abstractor is placed in Exterior cable by the present invention, is not resulted in the air breakdown electric discharge of cable, is reduced the probability of cable fire, Therefore overall structure is safer；Radiating tube 5 in the present invention is close to external protection 4, Stability Analysis of Structures and is not take up larger volume, no Difficulty of construction can be increased；Further, since add the oil storage space of hollow tube wall 51, cable is in load variations and when expanding with heat and contract with cold Insulating oil can more rapidly, it is sufficient be supplemented in inside cable, so as to further prevent the generation of air gap, further improve cable Security.

The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.

Claims

1. one kind radiating oil-filled cable, this radiating oil-filled cable includes wire stylet（1）, inner protective layer（2）, insulation oil reservoir（3） And external protection（4）；The inner protective layer（2）Each wire stylet is wrapped in respectively（1）Outside, each wire stylet（1） Screw up and the insulation oil reservoir is arranged on after winding（3）It is interior, in the insulation oil reservoir（3）Outer wrap have external protection（4）；Its It is characterised by：In the external protection（4）Outer wall on be fixed with along the wire stylet（1）The radiating tube of extension（5）, it is described to dissipate Heat pipe（5）Include hollow tube wall（51）, the hollow tube wall（51）With the insulation oil reservoir（3）It is connected；In the insulation Oil reservoir（3）With the hollow tube wall（51）It is interior to be filled with insulating oil；The radiating tube（5）Two ends basset and two ends height Degree is different；The radiating tube（5）Low order end（52）It is placed in earth's surface, high order end（53）Upwardly extend and be higher than low order end（52）15 It is more than rice.

2. radiating oil-filled cable according to claim 1, it is characterised in that：In the low order end（52）With the high order end （53）It is separately installed with moistureproof net（54）.

3. radiating oil-filled cable according to claim 1 or 2, it is characterised in that：In the radiating tube（5）Inside it is mounted equidistant Have and the radiating tube（5）Coaxial annular impeller（6）, the annular impeller（6）Can be relative to radiating tube（5）Around own axes Rotate；In annular impeller（6）During rotation, the annular impeller（6）With the radiating tube（5）Remain oil sealing shape State；In the annular impeller（6）Outer ring surface on be equidistantly fixed with moving tooth（61）, in the annular impeller（6）Inner ring surface on Equidistantly it is fixed with guide vane（62）.