CN2899220Y

CN2899220Y - Intermediate terminal

Info

Publication number: CN2899220Y
Application number: CN 200520037415
Authority: CN
Inventors: 康树峰; 胡平
Original assignee: Shenzhen Woer Heat Shrinkable Material Co Ltd
Current assignee: Shenzhen Woer Heat Shrinkable Material Co Ltd
Priority date: 2005-12-17
Filing date: 2005-12-17
Publication date: 2007-05-09
Anticipated expiration: 2015-12-17

Abstract

The utility model relates to a new intermediate terminal, in particular to a connection terminal for the cable intermediate terminal, which comprise from the inside and the outside, an inner screen pipe, a stress prick, an insulation layer and an external screen layer, in which the stress prick is arranged as the inner side against each other and parallel with the terminal, the external side keeps a distance with two ends of the intermediate terminal, which can reduce greatly the mar of the stress prick caused by extension when expanding, therefore prolonging the closed segment and improving the enclosure performance of the intermediate terminal, and improve the finished product rate and reliability. The external screen layer is semiconductor material, used to screen the electric field.

Description

Novel transition joint

Technical field

The utility model relates to a kind of electric cable fitting, a kind of novel transition joint that is used for the middle connection of cable.

Background technology

At present, the annex that is used for connecting in the middle of the cable comprise pyrocondensation transition joint and shrinkage indirect first two, the operation of pyrocondensation transition joint and structure more complicated all wherein, higher to construction requirement during use, advantage is that cost is lower; That the shrinkage medial head then has is simple in structure, volume is little, advantage such as easy to operate, stable and reliable for performance, in the industry cycle also is used widely.Fig. 1 is the structure chart of an example of prior art, and it is that the cylinder of a hollow comprises: inner shield pipe (1), tubaeform stress cone (2-1) and (2-2), insulating barrier (3) and outer shielding layer (4).Inner shield pipe (1) is arranged on the middle part of transition joint and parallel with the joint direction, stress cone (2-1) and contraction flow region end face (2-2) respectively with two end face settings of transition joint in one plane, outer shielding layer (4) is with conductive paint spraying or the semiconductor lamella of injection mo(u)lding on insulating barrier (3), above assembly pours into an integrated entity after produce the pyrocondensation transition joint after the crosslinking with radiation expansion, crosslinking with radiation is a current known technology, and this paper needn't add explanation again; Above assembly pours into an integrated entity and produces the shrinkage transition joint after at inner chamber stay pipe is set behind the mechanical expansion, when not using, be provided with the helical form stay pipe in the cavity, be provided with the termination in the stay pipe end, during use, extract the termination out, whole helical form stay pipe promptly becomes bar and is drawn out of, novel transition joint cavity shrinks, the cable middle interconnecting piece then can be wrapped in the cavity of novel transition joint, it is a known cold-shrink technology that the helical form stay pipe is set, and does not here elaborate.

In the prior art, because stress cone is to be made by semi-conducting material, its tear resistance is relatively poor, the end face that adds the end face of its contraction flow region and transition joint again in one plane, when expansion, damage because of stretching easily, stress cone is the very crucial parts of transition joint, near the horn mouth any damage can not be arranged, otherwise serious accident can occur when operation.

Summary of the invention

In order to overcome the shortcoming that transition joint stress cone now damages because of stretching when the expansion easily, the utility model provides a kind of novel transition joint, the contraction flow region end face of stress cone is left the end face of transition joint and maintain a certain distance with end face, make whole stress cone be wrapped in the insulating barrier the inside, guarantee that stress cone is not damaged in producing and installing.

The technical scheme that its technical problem that solves the utility model adopts is to set gradually from the inside to the outside: inner shield pipe (1), tubaeform stress cone (2-1) and (2-2), insulating barrier (3), and outer shielding layer (4).Described inner shield pipe (1) internal diameter is identical with the internal diameter of transition joint insulating barrier (3), inner shield pipe (1) is arranged on the middle part of transition joint and parallel with the joint direction, its both ends respectively with tubaeform stress cone (2-1) and (2-2) enlarged portion be that flare is relative, tubaeform stress cone contraction flow region i.e. closing in portion and transition joint both ends of the surface keep certain distance.

The beneficial effects of the utility model are, novel transition joint production process rate of finished products is higher, and product is more secure when used durable.

Description of drawings

Fig. 1 is the structural map of an embodiment of prior art.

Fig. 2 is the structural map of an embodiment of the utility model.

Fig. 3 is the structural map of another embodiment of the utility model.

Among the figure: 1. inner shield pipe, 2-1., 2-2. stress cone, 3. insulating barrier, 4. outer shielding layer,

Embodiment

In two embodiment of Fig. 2, Fig. 3, inner shield pipe (1) is the hollow pipe that is close in the insulating barrier (3).The internal diameter of inner shield pipe (1) is identical with the internal diameter of transition joint and two ends are rounded tangent with transition joint inner surface slyness, can not form cusp for outer shielding layer (4), effectively avoid the generation of point discharge, tubaeform stress cone (2-1) is that flare is relative with the two ends of inner shield pipe (1) respectively with (2-2) enlarged portion, tubaeform stress cone (2-1) and (2-2) contraction flow region be mouth not with the both ends of the surface maintenance certain distance of transition joint, inner shield pipe (1), stress cone (2-1) and (2-2), insulating barrier (3) and screen (4) pour into an integrated entity.

Claims

1. the utility model relates to a kind of novel transition joint, comprise the following assembly that sets gradually from the inside to the outside: inner shield pipe, tubaeform stress cone, insulating barrier and outer shielding layer, it is characterized in that two tubaeform stress cones are with the parallel insulating barrier the inside that is separately positioned on novel transition joint of joint direction and are positioned at inner shield pipe two ends it is inboard relative with two ends of inner shield pipe for the expansion side that the outside is contraction side and transition joint both ends of the surface maintenance certain distance.