CN2919637Y

CN2919637Y - Inner pipe of middle tie-in of cool-shrinked cable

Info

Publication number: CN2919637Y
Application number: CN 200620086705
Authority: CN
Inventors: 叶水音
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-30
Filing date: 2006-06-30
Publication date: 2007-07-04
Anticipated expiration: 2016-06-30

Abstract

The utility model provides an inner lining-pipe of a cold contraction cable middle joint. The inner lining-pipe is formed by the connection of two sections of liner tubes of equal-dimeter and length. The tap of the docking ports of the two liner tubes respectively go through the intracavity of each liner tube and extents to the other port; as the inner lining-pipe is drawled, two docking liner tubes remove from the midst of the cable joint part to two ends two-way & synchronously; as the inner lining-pipe is removed, the central part of the silicone rubber elastic sheath first retracts and holds cable joint part, thereby ensuring the accurate middle point position of the elastic sheath of the elastic retraction and the cable joint part after the liner tube removes, and eliminating the phenomenon that climb distance is not enough; besides, the construction of the utility model is simple.

Description

The internal lining pipe of shrinkage cable intermediate joint

Technical field

The utility model relates to the power cable equipment accessory product, the internal lining pipe of particularly a kind of shrinkage silicone rubber for cable transition joint.

Background technology

The power cable butt joint, lead butt joint back is divested owing to its insulating barrier, need to make insulating sleeve to guarantee the safety at cable joint position, the existing use usually has the insulating sleeve of the silicon rubber shrinkage cable intermediate joint of better elastic and insulating properties as cable joint.The structure of shrinkage cable intermediate joint has been shown among Fig. 1, and the flexible sheath 6 of shrinkage cable intermediate joint 5 is selected high temperature vulcanized organic silicon rubber for use, in the middle part of the two ends of flexible sheath 6 correspondence is provided with stress cone 61, inwall inner shield pipe 62 is set.Flexible sheath 6 is set in the outside of internal lining pipe 7 behind predilation, internal lining pipe 7 plays the supporting role that keeps flexible sheath 6 expansion states.As can be seen, existing internal lining pipe 7 is a plastics rib-loop formula bellows from Fig. 1, Fig. 2, and an end of internal lining pipe 7 is reserved with the lead-in 71 of slightly being longer than internal lining pipe length, and the inner chamber that internal lining pipe is passed in the tap of this reservation lead-in 71 stretches out the another port.During use, with reference to Fig. 3, shrinkage cable intermediate joint 5 is enclosed within the joint area of two butt joint cables, after the tap of pull lead-in 71 was from one end to the other side removed internal lining pipe 7, flexible sheath 6 retraction was held the joint area 81 of cable 8 tightly.With reference to Fig. 4, because the length of the flexible sheath 6 of expansion state will shorten (comparing with retracted state), when internal lining pipe 7 from an end when the other end is progressively removed, flexible sheath 6 will radially bounce back since an end and hold cable joint position 81 tightly, and along with pulling out of internal lining pipe 7 to other end axial elongation, cause flexible sheath 6 inaccurate, cause that bounce back the at first interior creep distance L of an end of flexible sheath 6 reduces, and will cause shorted to earth when serious with the middle point location of cable joint portion 81.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of internal lining pipe of shrinkage cable intermediate joint is provided, to solve internal lining pipe causes flexible sheath and cable joint position mid point location difficulty from an end pull technical problem, employing from the centre to the internal lining pipe of both sides bidirectional pulling, guaranteeing flexible sheath and the mid point accurate positioning of cable joint position, and constructing operation is easy.

The utility model is by the following technical solutions:

The internal lining pipe of shrinkage cable intermediate joint is characterized in that: isometrical and bushing pipes that length is suitable butt joint forms internal lining pipe by two joints, and the lead-in tap of two bushing pipe craft port passes respectively separately that the bushing pipe inner chamber stretches out the another port.

The craft port of described two bushing pipes adopts complete cycle hot weld butt joint.

Making of the present utility model, using method:

One, makes transition joint: choose two bushing pipes that joint is isometrical and length is suitable, the relative port of two bushing pipes is reserved with the lead-in of sufficient length respectively, the length that the length of reservation lead-in should slightly be longer than bushing pipe, the reservation lead-in root of two bushing pipes respectively to bushing pipe inner chamber crimping separately, and is passed its bushing pipe inner chamber with the tap of lead-in and stretches out the another port; Then, the relative port contraposition of two bushing pipes being compressed the complete cycle hot weld is docking together and makes internal lining pipe; Then, the flexible sheath behind the predilation is placed in passive internal lining pipe outside, and makes the middle part of the docking section processing flexible sheath of two bushing pipes.

Two, using method: above-mentioned shrinkage cable intermediate joint is sheathed on the cable joint position, and flexible sheath is alignd with the mid point at cable joint position, overhanging lead-in tap bidirectional pulling with the internal lining pipe two-port, two bushing pipes begin from the centre to separate and withdraw from synchronously to two ends, flexible sheath began elastical retraction from middle position and held the cable joint position tightly this moment, and along with progressively removing of two bushing pipes simultaneously to the two ends axial elongation, because the middle part of flexible sheath bounces back at first and holds the cable joint position tightly, thereby has guaranteed the accuracy of the middle point location at flexible sheath and cable joint position.

The utility model provides the internal lining pipe of shrinkage cable intermediate joint, internal lining pipe is formed by the two bushing pipe butt joints that joint is isometrical and length is suitable, the reservation lead-in tap of two bushing pipe craft port is passed separately respectively, and the bushing pipe inner chamber stretches out the another port, when internal lining pipe is drawn out of, two butt joint bushing pipes are removed to the two ends bi-directional synchronization from the middle part at cable joint position, when internal lining pipe is removed, the middle part of flexible sheath bounces back at first and holds cable joint tightly, thereby guarantee that internal lining pipe removes the back flexible sheath of elastical retraction and the mid point accurate positioning at cable joint position, the phenomenon of creep distance deficiency in stopping, and constructing operation is easy.

Description of drawings

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is the structural representation of existing silicon rubber shrinkage cable intermediate joint.

Fig. 2 is the structural representation of the internal lining pipe among Fig. 1.

Fig. 3 is the user mode schematic diagram of existing silicon rubber shrinkage cable intermediate joint.

Fig. 4 is that the flexible sheath retraction among Fig. 3 is held the schematic diagram at cable joint position tightly.

Fig. 5 is the structural representation of the internal lining pipe that provides of the utility model.

Fig. 6 is the component decomposition map of the internal lining pipe that provides of the utility model.

Fig. 7 is the structural representation that is lined with the silicon rubber shrinkage cable intermediate joint of the internal lining pipe that the utility model provides.

Fig. 8 is the user mode schematic diagram of transition joint shown in Figure 7.

Fig. 9 is that the flexible sheath retraction among Fig. 8 is held the schematic diagram at cable joint position tightly.

Embodiment

With reference to Fig. 5,6.The internal lining pipe of shrinkage cable intermediate joint, internal lining pipe 1 is formed by 11,12 butt joints of two bushing pipes that joint is isometrical and length is suitable, and the craft port of bushing

pipe

11,12 adopts complete cycle hot weld mode to dock; The craft port of two

bushing pipes

11,12 is reserved with the lead-in 111,121 of sufficient length respectively, the length that the length of reservation lead-in 111,121 should slightly be longer than bushing pipe, with reservation lead-in 111,121 roots of two bushing pipes respectively to bushing

pipe

11,12 inner chamber crimpings separately, and bushing

pipe

11,12 inner chambers are passed in the tap of lead-in 111,121 respectively stretch out the another port, the port contraposition that connects of two

bushing pipes

11,12 is compressed the back adopt the complete cycle hot weld to be docking together.

With reference to Fig. 7.Shrinkage cable intermediate joint 2 comprises above-mentioned internal lining pipe 1, flexible sheath 3, and the two ends correspondence of flexible sheath 3 is provided with stress cone 31, the inwall middle part is provided with inner shield pipe 32; Flexible sheath 3 is set in the outside of internal lining pipe 1 behind predilation, and makes the docking section of two

bushing pipes

11,12 be in the middle part of flexible sheath 3, and internal lining pipe 1 plays the supporting role that keeps flexible sheath 3 expansion states.

With reference to Fig. 8, Fig. 9: the occupation mode of above-mentioned transition joint: the joint area 41 that above-mentioned transition joint 2 is sheathed on two butt joint cables 4, and flexible sheath 3 is alignd with the mid point at cable joint position 41, with overhanging lead-in 111, the 121 tap bidirectional pullings of internal lining pipe 1 two-port, two bushing pipes, 11,12 joints from the centre begin to separate and withdraw from synchronously to two ends; At this moment, flexible sheath 3 begins elastical retraction from middle position and holds cable joint position 41 tightly, and along with two

bushing pipes

11,12 progressively remove and simultaneously to the two ends axial elongation, because the joint area 41 that the middle part of flexible sheath 3 bounces back at first and holds cable tightly, thereby guaranteed the mid point accurate positioning of the flexible sheath 3 behind the retraction with cable joint position 41, make the inner shield pipe 32 cable joint position 41 of contracting fully, solved the technical problem of the mid point location difficulty at flexible sheath after existing internal lining pipe causes bouncing back from an end pull and cable joint position, the phenomenon of creep distance deficiency in stopping.

Claims

1, the internal lining pipe of shrinkage cable intermediate joint is characterized in that: isometrical and bushing pipes that length is suitable butt joint forms internal lining pipe by two joints, and the lead-in tap of two bushing pipe craft port passes respectively separately that the bushing pipe inner chamber stretches out the another port.

2, internal lining pipe according to claim 1 is characterized in that: the craft port of described two bushing pipes adopts complete cycle hot weld butt joint.