CN2446701Y

CN2446701Y - High elasticity cold contraction cable intermediate joint sheath

Info

Publication number: CN2446701Y
Application number: CN 00221732
Authority: CN
Inventors: 包廷贵
Original assignee: Zhenjiang Jiangguan Electrical Appliances Co ltd
Current assignee: Zhenjiang Jiangguan Electrical Appliances Co ltd
Priority date: 2000-09-13
Filing date: 2000-09-13
Publication date: 2001-09-05
Anticipated expiration: 2010-09-13

Abstract

The utility model relates to a high-elasticity cold-contraction cable transition joint sheath, which is applied to power cables, communication cables and electric lines. The sheath comprises a prefabricated inner lining tube which is wound by plastic flat yarn and is processed by spot welding, the prefabricated inner lining tube can also be wound by steel wires, and a plastic threaded corrugated tube can also be adopted. Then, a pre-expanded silicon rubber straight tube is sheathed outside the inner lining tube. When the sheath is installed at a cable transition joint, the inner lining tube only needs to be withdrawn to pass through the pre-expanded silicon rubber straight tube, and the sheath immediately rebounds and shrinks to tightly wrap around the cable transition joint. The utility model overcomes the shortcomings of the limitation of climate and environmental condition and the complication of construction technique during the application of the prior art.

Description

The cold contraction cable intermediate joint of high resiliency sheath

The utility model is a kind of cable intermediate joint sheath that is applied in power cable, communication cable and the electric line.

At present, the exhausted major part of the domestic sheath that uses on cable intermediate joint is the cable cover(ing) of plastics, nylon outer shell and thermal contraction.Old-fashioned nylon, plastic sheath are easily aging, and the life-span is short, and insulation property are poor, and installation effectiveness is low, is eliminated gradually.Though now adopt the thermal contraction sheath to handle cable intermediate joint in a large number, can only reduce labour intensity, improve work efficiency.Its weak point is still need prepare burning things which may cause a fire disaster at the construction field (site), and sheath is heated just can finish installment work, the construction technique complexity: the distance of flame and sheath is too big, and then jacket shrinkage is incomplete, and the space can be caused in the inside, stays to fall into to suffer from; Distance is too little, and burning again easily in the surface of sheath, has reduced dielectric strength.In addition, when the thermal contraction sheath is installed, also be subjected to the restriction of weather, environmental condition, particularly can not construct,, can't operate substantially if in narrow space in subzero.

The purpose of this utility model is that the cold contraction cable intermediate joint of a kind of high resiliency sheath will be provided, and need not burning things which may cause a fire disaster during construction and installation, also is not subjected to the restriction of any climatic environment condition, can overcome the weak point of above-mentioned thermal contraction sheath effectively.

The purpose of this utility model is achieved in that this sheath comprises a passive internal lining pipe of making in advance, and the silicon rubber straight tube with predilation is enclosed within the internal lining pipe outside then.When cable intermediate joint position installation sheath, only need to extract out internal lining pipe, then, wrap tightly in the cable intermediate joint periphery through the just contraction of resilience immediately of silicon rubber straight tube of predilation.

The utility model is because only need be enclosed within the silicon rubber straight tube of predilation the internal lining pipe outside, so structure is simple especially, when mounted, weather and environmental condition are not had any specific (special) requirements, be easy to realize that the resilience contraction puts in place, wrap tightly on cable intermediate joint, play sealing, protection against the tide, safe and reliable purpose, general personnel can very fast grasp mounting technique, has accelerated construction schedule, and its effect is conspicuous.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the office's sectional structural map that is wound in internal lining pipe with plastic flat fiber.

Fig. 2 is with the office sectional structural map of plastic film capicitor as internal lining pipe.

Fig. 3 is the office's sectional structural map that is wound in internal lining pipe with steel wire.

Among the figure: 1, internal lining pipe 2, pad 3, silicon rubber straight tube 4, plastic flat fiber 5, plastic flat fiber head 6, steel wire 7, steel wire head 8, plastic film capicitor 9, plastic film capicitor silk head

Embodiment one: with reference to Fig. 1, the utility model is wound in internal lining pipe (1) according to the cable footpath with plastic flat fiber (4).In winding process, twine on the limit, and spot welding is carried out on the limit between every circle, each pad (2) is played link and integrant effect.Weldering is apart from requiring between 5 to 20 millimeters.Then according to cable footpath with silicon rubber straight tube predilation to certain size, more passive plastic inner lining pipe (1) is packed in the silicon rubber straight tube of being expanded (3).In addition, the plastic flat fiber head (5) of internal lining pipe one end is passed the other end of internal lining pipe in manage.When using, only need the utility model is placed in the precalculated position of cable intermediate joint, oppositely gently take out plastic flat fiber head (5), by sparse pad (2), flat filament is easy to tear, up to haveing suffered till internal lining pipe exhausted, the resilience immediately of silicon rubber straight tube is shunk, tightly be wrapped in the cable intermediate joint periphery.

Embodiment two: as shown in Figure 2, internal lining pipe (1) is a kind of plastic film capicitor (8), and the bellows outside is a rib-loop formula corrugated surface, and the inboard is the light face.Predilation silicon rubber straight tube (3) is enclosed within the outside of plastic film capicitor (8), the plastic film capicitor silk head (9) of internal lining pipe (1) one end is passed the other end of internal lining pipe in manage.In use, method is with embodiment one.

Embodiment three: as shown in Figure 3, internal lining pipe (1) is to be entwined with steel wire (6).Equally, predilation silicon rubber straight tube (3) is enclosed within steel wire tube outside, the steel wire head of internal lining pipe (1) one end (7) is passed the other end of internal lining pipe in manage.In use, method is with embodiment one, and the steel wire of extracting out can use repeatedly.

Claims

1, the cold contraction cable intermediate joint of a kind of high resiliency sheath, this sheath comprises a silicon rubber straight tube (3), it is characterized in that a passive internal lining pipe (1) is arranged in the silicon rubber straight tube (3), silicon rubber straight tube (3) is through being enclosed within the outside of plastic inner lining pipe (1) behind the predilation, the silk head of internal lining pipe one end passed the other end of internal lining pipe in manage.

2, cable intermediate joint sheath according to claim 1 is characterized in that internal lining pipe (1) made through spot welding while twining by plastic flat fiber (4), and weldering is apart between 5～15 millimeters.

3, cable intermediate joint sheath according to claim 1 is characterized in that internal lining pipe (1) can be a kind of plastic film capicitor, and the bellows outside is a rib-loop formula corrugated surface, and the inboard is the light face.

4, cable intermediate joint sheath according to claim 1 is characterized in that internal lining pipe (1) also can be to be entwined with steel wire (6).