CN1094262C

CN1094262C - power line cable connector

Info

Publication number: CN1094262C
Application number: CN971919461A
Authority: CN
Inventors: 安德烈·杜邦; 多米尼克·默丘佐特
Original assignee: Whitaker LLC
Current assignee: Whitaker LLC
Priority date: 1996-01-30
Filing date: 1997-01-22
Publication date: 2002-11-13
Anticipated expiration: 2017-01-22
Also published as: JP2000513481A; CN1209909A; DE69702383D1; FR2744288A1; FR2744288B1; WO1997028577A1; EP0878031B1; AU724871B2; EP0878031A1; DE69702383T2; AU1396197A

Abstract

A splicing connector (2) for power line conductors comprises a tubular body (4) having a plurality of ribs (28) extending longitudinally along a bottom portion of the body. The ribs (28) are transversely cut, for example by screw machining operation, with grooves (32) such that individual teeth are provided. The depth of the grooves can be modified depending on the purpose of the connector, for example, either for insulation piercing of insulative conductors, of for clamping of bare conductor ends.

Description

Power line cable connector

The present invention relates to connection or butt joint that power line cables for example has the voltage conducting cable of circular heart yearn.This connection can be used for the permanent connection of overhead or clandestine network cable.

Up at present, this connection realizes by means of sleeve or pipe, in its vertical hole, inserts two two opposite ends according to cable to be connected.In case in this two ends insertion tube, pushed by means of the instrument of hydraulic press one class some point, so that two cables for good and all are assembled together at pipe.

Readily understand that this assembling process need be used hydraulic means, be used on the deep draw instrument so that pressure is applied to.This device comprises electric notor one class device, is used for driving hydraulic pump.In addition, must adopt suitable stamping tool, make it be adapted to connection pattern for the function that is connected cable size.So, on the one hand, when selecting suitable tools, may be wrong, on the other hand, because this equipment all uses on the ground of spaciousness, sometimes on mud or sandy soil ground, thereby this instrument or hydraulic means may damage.So these are connected with defective sometimes, particularly be embedded in when underground when cable, just extreme unfavorable.

For addressing the above problem, provide as British patent GB 2 174 851 and having being connected or butt connector of cutting head screw shown in the GB 2 272 586.The plain conductor of Stranded cable inserts in the passage of these connectors, and clamps by pressure pad, and pressure pad is clamped on the cable downwards by means of screw.In case reach torque limit, head of screw is just cut, and limits the clamping pressure of cable by this.Thereby provide a permanent connection that does not need collapsible tube.

One of problem of this design is that the strand wire of power cable may be among the bad electric contact state each other and between the connector.Owing to be used for the high electric current of power transmission line, and for the needs that good electrical connects, the reduction of docking the interior switching performance of cable electrical is extremely disadvantageous.In addition, many cables that are used for industry are made by aluminium alloy, and it can form thin anti oxidation layer, has weakened conductivity.Therefore require to overcome these defectives, and improve the connected system of this butt joint.Power line conductor has multiple size and structure, and some is the multiply aluminium alloy cable with insulating covering, in some occasion, is hollow aluminium alloy or copper.For large-diameter cable, in by butt connector, connect before two cut cables, peel off insulating covering, to guarantee minimum contact resistance.On the other hand, in some application scenario, need not peel off insulating covering, require to have a perverse connector of wearing insulation, it need not be peelled off the insulating covering part and connect.It is owing to the inner face that prevents the water intrusion insulating covering, and the advantage of restricted cable corrosion, perhaps it has simplified linker.For example patent EP239428 has disclosed the perverse connected system of wearing insulation that is used for connecting in the cable.

Among GB-A-1465907, show a kind of power line butt connector, it comprises that one has the tubular body by the itself tubular wall extending therebetween, be used for holding the end of cable within it, this connector also comprises towards the transversely movable clamping element of this cavity, be used for cable end is clamped in the tubular body diapire relative with clamping element, this diapire has a plurality of being used for and perversely wears the cable conductor insulating covering so that the tooth that is attached thereto.This tubular body is made up of with the top of separating of assembling with it the bottom of extrusion molding.

Owing to there are many multi-form and cables size to be used for electric power transfer industry, therefore requiring has a kind of butt connector, and it can be suitable for the modification of various different cables easily, so that reduce its manufacturing and processing cost.It also requires a kind of like this butt connector, in the mode that reduces cost as far as possible, in connect two kinds of different cables.

The improved purpose that forms theme of the present invention is, overcomes these shortcomings, and a kind of connector that need not use complex apparatus rather and carry out permanent connection is provided.

Another object of the present invention is, the connection used one or the connector of butt joint are provided more, to reduce cost and to use reliably, connects the various modification of different cables in being used for, and wherein, for example, stranded conductor is outer naked or have an insulating covering.

Purpose of the present invention is by means of providing a power line butt connector to reach, this connector comprises the tubular body of a longitudinal extension, and has a vertical chamber of extending by this tubular body, be used for holding the end of cable, and comprise the clamping device that extends transverse in the chamber, be used for cut cable is clamped and be connected electrically to this butt connector, wherein, this connector comprises a plurality of sharp-pointed ribs along the tube chamber bottom longitudinal extension relative with this clamping device, this rib is along the whole length of tubular body substantially and extend the enough perverse insulating barrier that is contained in the tubular body inner wire of wearing of the degree of depth that tooth has.Rib by transverse cuts, is used for perverse contact pressure of wearing insulating barrier so that increase with certain pitch and the degree of depth, perhaps increases to come with the damaged conductor multiply contact pressure of plain conductor oxide layer outward.Transverse cuts can be undertaken by the mode of screw chasing processing, and it is special quick and cost is low, by this, but connects the body extrusion molding and cuts into the length of requirement.So advantageously, connector manufacturing cost spy is low, and extremely general, and the conductor of various different sizes and pattern all can be connected with it.In order to thrust conductor, transverse cuts can be done very deeply and have coarse pitch, so that increase the pressure that penetrates into of tooth.For outer bare conductor, the finer pitch of transverse cuts and the less degree of depth can provide many little cusps that go deep into the outer plain conductor of multiply, by this can damaged oxide layer, increase the long-pending and mat frictional resistance of contact surface and keep the conductor location effectively be electrically connected with it so that realize.

Connection connector with differing heights longitudinal rib also can be provided, and by this, the tooth of growing (promptly higher) both can be used as the perverse tooth of wearing insulation, can prevent moving of the outer bare conductor of multiply again, and short tooth can be used to improve and being electrically connected of outer bare conductor.

A plurality of embodiment of the present invention is described with the method for example with reference to the accompanying drawings.Wherein:

Fig. 1 is a butt connector longitdinal cross-section diagram of the present invention;

Fig. 2 is the cross-sectional view by the 2-2 line of Fig. 1;

Fig. 3 connects the schematic perspective view of body for Fig. 1;

Fig. 4 for Fig. 3 similar have longitudinal rib different size transverse cuts is connected the body schematic diagram;

Fig. 5 is the partial view of another embodiment of the present invention, wherein provides the tooth of differing heights;

Fig. 6 for the similar partial view that tooth has been carried out transverse cuts of Fig. 5.

At first with reference to Fig. 1, a butt connector 2 comprises a tubular body 4, and this tubular body has one by this tubular body tubular wall extending therebetween 6, is used for holding the termination of conductor within it; A plurality of clamping elements 8 that extend transverse to cavity 6 are used for clamping conductor.Should put down tight part 8 be screw 10, was screwed into laterally to extend in the screw 12 of this cavity 6 by these tubular body 4 walls.

This screw 10 has a torque limited 14, it can with screw 10 whole manufacturings, or with its fixing single part, when the moment of torsion that applies overflows, just be cut off.In this manner, the screws clamp pressure that is contained in the cable in the cavity 6 can accurately limit.Screw 10 heart portion therein has a clamping area 16 with depression 18, to increase the extruding force of clamping area to lead.Can guarantee that also cable to be clamped enters in the depression 18, make the cable can side direction and vertical fastening location, so that prevent moving of it.

Butt connector 2 also can be equipped with the external seal housing 20 of sealing tubular body and have synthetic rubber lid member 22 at its two ends, it have longitudinal extension and with the falred entrance portion 24 of inner chamber 6 centerings, and has a radial seal lip 26, it is docile with the cable that inserts by its and flexibly cooperate, and reaches the purpose of sealing.For the interface that is tightly connected, can provide gel seal glue in the cavity 6 below clamping element 8.

Referring now to Fig. 1 to 4, in this embodiment, tubular body 4 is one to cut into the metal extrusion that requires length, and it comprises the relative elongated pinnacle rib 28 along tubular body bottom 30 longitudinal extensions of a plurality of clamping areas with screw 10.This rib 28 is radially inside towards cavity 16 central axis.The degree of depth of this rib 28 is enough to the perverse insulating barrier of wearing the conventional powerline conductor, so that be electrically connected with the stranded conductor of its inside.

Appreciable as Fig. 1 and Fig. 3, by transverse cuts, these grooves carry out screw chasing with the method identical with screw thread processing and form a plurality of ribs 28 by means of a plurality of groove 32.The combination of these ribs 28 and these grooves 32 forms numerous teeth 34.Be used for connecting at connector under the situation of the conductor with insulating barrier, the degree of depth of groove 32 and width can be adjusted, and so that sharp-pointed apical tooth 34 more or less to be provided, to be used to provide and perversely to wear insulating barrier and enter the desired pressure of stranded conductor of conductor.The tooth of the processing of different screw threads with the tooth of the other end 5 also can be provided at an end 3 of tubular body 4, thereby, different conductors can connect at the two ends of connector and with separately clamping element 8 ', 8 be clamped together.The degree of depth of groove 32 also can change, so that be suitable for the conductor of different insulative layer thickness, by this, guarantee to obtain the correct degree of depth, and avoids the unnecessary cutting of stranded conductor.

See as Fig. 4, be used to there is not the conductor of insulating barrier or be used for the contact of the conductor that insulating barrier peelled off if pressure surface is requirement, then with very little pitch (p) and quite shallow transverse cuts 32 ' process by thread forms along rib 28, to penetrate into conductor.Thereby guarantee that oxide layer is damaged, and obtain high contact pressure and the long-pending effect of large contact surface.

Above-mentioned design makes the extrusion molding of tubular body, cuts into the length of requirement then, and this is the low especially method of cost of this connector of a kind of generation in enormous quantities.Screw chasing processing is again highly effective processing method, at this moment, can easily change cutter, so that the cross cutting of different depth and pitch to be provided.

Referring now to Fig. 5 and Fig. 6, butt connector 102,202 also can be provided, they have with front embodiment describes similar cavity 106 and clamping element 108, connector also be equipped with numerous longitudinal rib 128,128 '.Some rib 128 ' can be higher than other rib 128 far away.High rib can be used to as shown in Figure 6 to provide the perverse tooth 228 of wearing insulation ', perhaps, if location is outer bare conductor in it, being displaced sideways of stranded conductor of rib 128 ' or tooth 228 ' be used for preventing then, when it being tightened, prevent between the stranded conductor and contact pressure lax between the conductor with convenient pinching screw.Little rib 128,228 is guaranteed the increase of contact pressure and is penetrated into the oxide layer of paired stranded conductor.Just like preceding embodiment, the degree of depth of the tooth that provides by the crosscut rib and pitch also can be made amendment as the conductor size that is attached thereto and the function of pattern.

Claims

1. power line butt connector (2,102), comprise a tubular body (4), it has one by it and the cavity (6) of longitudinal extension to hold two cut cables within it, said connector also comprises clamping element (8,8 '), can move laterally to said cavity (6), be used for said cut cable against the diapire (30) of said tubular body (4) and clamp, said diapire (30) is relative with clamping element, said diapire (30) has a plurality of longitudinal extensions, and radially towards the pinnacle rib (28) of said cavity longitudinal axis (A) center, said tubular body is prismatic, thereby, but its vertical profile extrusion molding, said a plurality of rib (28) is by transverse cuts, thereby form single tooth (34), the height of said a plurality of ribs (28) is characterized in that greater than the thickness of the insulating covering that centers on the traditional cable conductor, said tube-like piece is a single piece, and said tooth cuts a plurality of transverse grooves (32) by screw thread processing and forms.

2. according to the said connector of claim 1, it is characterized in that said tubular body has the oval cross section section, have the sidewall of a plurality of length, short top and diapire.

3. according to the said connector of claim 1, it is characterized in that said a plurality of transverse grooves (32) have V-shaped section.

4. according to the said connector of claim 1, it is characterized in that one or more said ribs (128 ', 228 ') are higher than contiguous rib (128,228).

5. according to the said connector of claim 1, it is characterized in that the degree of depth of said a plurality of grooves (32) is enough to make the perverse thickness of wearing said insulating covering of said tooth (34).

6. according to the said connector of claim 1, it is characterized in that the degree of depth of said a plurality of transverse grooves (32 ') is less than the thickness of said insulating covering, thereby said tooth (34) is suitable for being used for connecting outer naked stranded conductor.

7. according to the said connector of above arbitrary claim, it is characterized in that the tooth (34) that said tubular body one end (3) is equipped with is different from the tooth that the other end (5) is equipped with, thereby, two kinds of different conductors can be connected at two ends.