CN2192968Y

CN2192968Y - Heating expanding type intermediate joint for oil soaking cable

Info

Publication number: CN2192968Y
Application number: CN 93222571
Authority: CN
Inventors: 于维谦; 张延寿; 徐永平; 于子明
Original assignee: CHANGYUAN APPLIED CHEMISTRY Co Ltd SHENZHEN
Current assignee: CHANGYUAN APPLIED CHEMISTRY Co Ltd SHENZHEN
Priority date: 1993-08-16
Filing date: 1993-08-16
Publication date: 1995-03-22
Anticipated expiration: 2003-08-16

Abstract

A heating expanding type intermediate joint for oil soaking cables is used for connecting two full-wrapped type shielding three-core cables and avoids the shortages that insulating materials are not filled fully and are easy to be expanded and aged to make the cables not run normally existing in the prior art. The utility model comprises cable three phases core threads, an oil removal tube 24, three finger-stall 23, a connecting tube 31, double layer oil removal tubes (33, 34), a triangular supporting frame 41, ointment 42, an oil removal sheathing 43, a semiconductor sheathing 45, a copper shielding net 46, a metallic sheath 48 and a thermal shrinkage sheathing 52. The three finger-stall 23 is fixed at bifurcate root of the cable three phases core threads in a thermal shrinkage way. The three finger-stall 23 is sheathed with the oil removal tube 24. The triangular supporting frame 41 and the ointment 42 are arranged among all the phases butt-joint core threads which are sheathed with the connecting tube 31 and the double-layer oil removal tubes (33, 34). The outer parts of the three phases core threads are fixed and are sheathed with the oil removal sheathing 43, the semiconductor sheathing 45, the copper shielding net 46, the metallic sheath 48 and the thermal shrinkage sheathing 52 layer by layer in the thermal shrinkage way. The three phases core threads are fixed as a whole by swathing bands. The utility model is safe and the phenomena of a short circuit and breakdown can not occur.

Description

Heating expanding type intermediate joint for oil soaking cable

The utility model relates to the high voltage power cable interconnection technique, particularly relates to the thermal shrinkage type transition joint of 10 kilovolts of oil-impregnated paper insulation cables.

The oil-impregnated paper insulation power cable that China produces is the turnkey shield type, and the thermal shrinkage type joint of prior art but only is used for phase-splitting shield type cable.Some companies once managed at cable end the turnkey shield type to be become the phase-splitting shield type and connected to utilize the thermal shrinkage type joint, but in fact three prongs of cable end three-phase heart yearn division place are filled by filling glue, can't solve the problem that there is the space in three prong roots, and because used stress tube and semiconductive pipe oil resistant not, operation back material swelling, cause dielectric strength to reduce greatly, cable can't normally move.

The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part and a kind of transition joint technology that is suitable for homemade all-round shielding oil immersion power cable is provided, and makes it long-time safe operation and the punch-through that is not short-circuited.

The purpose of this utility model can reach by following measure: make the transition joint of a kind of oil compression cable thermal shrinkage type, be used to connect two all-round shielding three-core cables, comprise cable body (armouring, sheath, turnkey paper, heart yearn) and add parts.Three prong roots in two cable three-phase heart yearn divisions place respectively have a thermal contractible plastic ring quilt cover to the horn mouth of sheath to add heat fixation, oil removal three-finger gloves cover to the trident root that has thermal contractible plastic to make adds heat fixation, and there are many oil removal pipes to be inserted in the crotch of each heart yearn respectively, add heat fixation until gloves.Each phase heart yearn of two cables docks one by one, entangles, compresses with tube connector, and overlapping with two oil removal pipes is placed in outside it, successively mind-set two ends heat shrink therefrom.Between each phase heart yearn, equidistantly along its length lay a plurality of insulation A-frames, cause phase spacing, their are bound become one again, alternately be full of with ointment, the outside puts the oil removal sheath, and two ends ride on the sheath, and heat shrink is fixed from the middle to both ends.Partly lead protecting pipe and be enclosed within the outside of oil removal sheath, two ends ride on the sheath, from the centre to the both sides heat shrink.There are copper shield net and metallic sheath tube in the outside again, and outermost layer is the end sheath that thermal contractible plastic is made, and is overlapped on the cable cover(ing), adds heat fixation.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the stripping size schematic diagram of the utility model transition joint;

Fig. 2 is every phase swagelok scheme of installation;

Fig. 3 is the A-frame schematic diagram that causes phase spacing used;

Fig. 4 is the utility model transition joint schematic cross-sectional view.

Be described in further detail below in conjunction with most preferred embodiment shown in the drawings:

The utility model transition joint is used to connect two all-round shielding three-core cables, sees Fig. 1, comprises cable body 1(armouring 11, sheath 12, turnkey paper 13, heart yearn 14) and add parts.During connection, two cables that will connect are ajusted, and both sides overlap 200 millimeters, measure 800 millimeters (long ends) and 500 millimeters (short ends) peel off sheath from central point, binding wire on 50 millimeters steel armourings 11 of distance sheath incision position, and all the other divest.Tear inner cushion layer to steel armour 11 incision positions, clean sheath 12 surfaces, keep 200 millimeters, all the other divest.At the incision position horn mouth that expands, partly lead paper beyond tearing horn mouth off, with two cable three-phase heart yearns (14) separately, and overlap to the horn mouth of sheath 12 with a thermal contractible plastic ring 21 at this three prongs root and to add heat fixation.Fill glue 22 overlap joint sheaths 12 from the down wrapped oil resistant of three prongs, its outer oil removal three-finger gloves 23 that has thermal contractible plastic to make again overlaps to the trident root and adds heat fixation, sees Fig. 2.There are many oil removal pipes 24 to be inserted in the crotch of each heart yearn 14 respectively, add heat fixation until gloves 23.Each phase heart yearn 14 end of two cables all are whittled into " pencil stub ", and butt joint is entangled, compressed with tube connector 31 one by one, and the coated outside aluminium foil is " pencil stub " to two ends, and hold filling glue 22 overlap joint oil removal pipe 24, the wrapped teflin tapes 32 of half lap scarf joint then.Overlapping with oil removal pipe 33,34 is enclosed within their outsides, successively mind-set two ends heat shrink therefrom.Between each phase heart yearn 14, equidistantly along its length lay a plurality of insulation A-frames 41, see Fig. 3, to cause phase spacing, with insulating tape their are bound again and become one, alternately be full of with ointment 42.Oil removal gloves 23 roots hold oil resistant glue for 40 millimeters, and the three-phase heart yearn outside of encircling puts oil removal sheath 43, and two ends ride on the sheath 12, heat shrink is fixed from the middle to both ends, clamp 44 chuckings are also used in two ends, and the outside holds into smooth surface with self-adhesive tape again, sees Fig. 4.Partly lead protecting pipe 45 and then be enclosed within more outerly, two ends ride on the sheath 12, from the centre to the both sides heat shrink.

The outside is with copper shield net 46 again, is communicated with two ends sheath 12 and steel armouring 11 simultaneously with ground wire 47, and welds; Copper mesh 46 outsides are metallic sheath tubes 48, and two ends all are with end metal sleeve 51, and its bifurcated termination uses the self-adhesive tape colligation on steel armouring 11.The outermost layer of the utility model transition joint is a pyrocondensation end sheath 52, and two is overlapped on the cable cover(ing) 150 millimeters, adds heat fixation, and hard-pressed bale is lived metallic sheath tube 51 and both ends thereof until cable cover(ing).

Be placed in the A-frame 41 between each phase heart yearn 14, be a homogeneous radiation shape, have the soft rubber and plastic piece of rectangular cross section, one vertical open-work is arranged in its geometric center.

Compare with prior art, the advantage of heating expanding type intermediate joint for oil soaking cable of the present utility model is:

1. strengthened insulation. Cancellation prior art used stress tube, half conduit and partly lead the not oil resistant parts such as three-finger gloves are used the oil resistant three-finger gloves and are not had the oil resistant pipe of expansion vestige; There is soft rubber and plastic A-frame to separate between the three-phase heart yearn, and the alternate high-temperature insulation fat that is full of, eliminated the space, outside and cover have the turnkey oil proof sheath pipe of pyrocondensation;

2. use and partly lead protecting pipe, copper shield net and ground wire, form whole turnkey shielding harness;

3. outermost layer is formed outer protection system by metallic sheath tube and insulating end sheath.

So transition joint of the present utility model is safe and reliable, the long-term use punch-through that can not be short-circuited.

Claims

1, the transition joint of a kind of oil compression cable thermal shrinkage type, be used to connect two all-round shielding three-core cables, comprise cable body (1) (armouring (11), sheath (12), turnkey paper (13), heart yearn (14)) and add parts, it is characterized in that: three prong roots in two cable three-phase heart yearn (14) divisions place respectively have thermal contractible plastic ring (a 21) quilt cover to the horn mouth of sheath (12) to add heat fixation, the oil removal three-finger gloves (23) that has thermal contractible plastic to make overlaps to the trident root and adds heat fixation, and there are many oil removal pipes (24) to be inserted in the crotch of each heart yearn (14) respectively, add heat fixation until gloves (23); Each phase heart yearn (14) of two cables docks one by one, entangles, compresses with tube connector (31), and overlapping with oil removal pipe (33), (34) is placed in outside it, successively mind-set two ends heat shrink therefrom; Between each phase heart yearn (14), the equidistant along its length a plurality of insulation A-frames (41) of laying, cause phase spacing, again they are bound and become one, alternately be full of with ointment (42), the outside puts oil removal sheath (43), and two ends ride on the sheath (12), and heat shrink is fixed from the middle to both ends; Partly lead protecting pipe (45) and then be enclosed within more outerly, two ends ride on the sheath (12), from the centre to the both sides heat shrink; The outside is with copper shield net (46) again, its outer metallic sheath tube (48) in addition, and outermost layer is the end sheath (52) that thermal contractible plastic is made, and is overlapped on the cable cover(ing), adds heat fixation.

2, according to the transition joint of the described oil compression cable thermal shrinkage type of claim 1, it is characterized in that: be heated fixing position at pyrocondensation ring (21),, down be surrounded with oil resistant from three prongs and fill glue (22) overlap joint sheath (12) in gloves (23) the inside.

3, according to the transition joint of the described oil compression cable thermal shrinkage type of claim 1, it is characterized in that: each heart yearn of two cables (14) is before connection, and the end all is whittled into " pencil stub "; With tube connector (31) they are docked one by one, compress, then, tube connector (31) coated outside aluminium foil is to two ends " pencil stub ", and holds and fill glue (22) overlap joint oil removal pipe (24), the wrapped teflin tape of half lap scarf joint (32) then.

4, according to the transition joint of the described oil compression cable thermal shrinkage type of claim 1, it is characterized in that: the three-phase heart yearn outside of encircling puts oil removal sheath (43) before, and two oil removal gloves (23) roots have also held oil resistant glue (22).

5, according to the transition joint of the described oil compression cable thermal shrinkage type of claim 1, it is characterized in that: after oil removal sheath (43) heat shrink was fixing, clamp 44 chuckings were also used in two ends, and the outside holds into smooth surface with self-adhesive tape again.

6, according to the transition joint of the described oil compression cable thermal shrinkage type of claim 1, it is characterized in that: copper shield net (46) is communicated with two ends sheath (12) and steel armouring (11) simultaneously with ground wire (47), and welds.

7, according to the transition joint of the described oil compression cable thermal shrinkage type of claim 1, it is characterized in that: metallic sheath tube (48), two ends all are with end metal sleeve (51), and its bifurcated termination uses the self-adhesive tape colligation on steel armouring (11).

8, according to the transition joint of the described oil compression cable thermal shrinkage type of claim 1, it is characterized in that: also have the outermost layer of pyrocondensation end sheath (52) in described transition joint, add heat fixation, hard-pressed bale is lived metallic sheath tube (51) and both ends thereof until cable cover(ing).

9, according to the transition joint of the described oil compression cable thermal shrinkage type of claim 1, it is characterized in that: to be placed in A-frame (41) between each phase heart yearn (14) be a homogeneous radiation shape, have the soft rubber and plastic piece of rectangular cross section, in its geometric center one vertical open-work arranged.