The conductor connect structure of power cable
Technical field
The present invention relates to the conductor connect structure of power cable, particularly relate to the male of installing by the end that is inserted in cable conductor in the bucking electrode of being located at epoxy insulation body inside in one, thus the slidingtype conductor connect structure that carries out the connection of cable conductor.
Background technology
In the slidingtype conductor connect structure, in order to connect the conductor of male and bucking electrode side, and using tubaeform joint, this tubaeform joint is cylindric by a plurality of rectangle conductor pieces are arranged in, and disposes garter spring and obtain (with reference to patent documentation 1) in its both ends periphery.
Tubaeform joint forms inside protuberance at the both ends of each rectangle conductor piece, and the inside protuberance that makes both ends with the elastic force of garter spring and the ring-type bead that forms on the conductor of bucking electrode side and the ring-type bead that forms at the male leading section engage, conductor and male with the bucking electrode side is electrically connected thus, and prevents extracting of male.
But, if the engaging (blocking) of the ring-type bead of the inside protuberance of tubaeform joint and male is loose excessively, the trouble that when tensile force puts on the cable, exists male to come off then from tubaeform joint, in addition, if the engaging tension then becomes and can't extract male, therefore, when needs are removed connection, can't connect releasing.
Therefore, patent documentation 1 has proposed following motion: the angle initialization of the holding section of the ring-type bead of the protuberance of tubaeform joint and male in proper range, is realized that simultaneously extracting of male prevents and be connected releasing.
In addition, citing document 2 has proposed following motion: tubaeform joint only has the function of electrical connection, be provided with different with tubaeform joint, can connect releasing extract anti-locking mechanism, thereby realize that simultaneously extracting of male prevents and be connected releasing.
Patent documentation 1:JP spy opens flat 9-180781 communique
Patent documentation 2:JP spy opens the 2002-142350 communique
But, as described in citing document 1, in the mode of the angle of the holding section of the ring-type bead of the inside protuberance of adjusting tubaeform joint and male,,, male is not drawn out easily though becoming if increase angle, remove the difficulty that becomes but connect, if reduce angle, become easily though connect to remove, male becomes and extracts easily, therefore, the setting of angle is very difficult.Therefore, in this mode, be difficult to prevent reliably extracting of male.
In addition, as described in citing document 2, in the mode of extracting anti-locking mechanism different with tubaeform joint, that can connect releasing is set, the difficult point that exist the total length of conductor coupling portion elongated, connecting portion maximizes.
Summary of the invention
The object of the present invention is to provide a kind of conductor connect structure of power cable, it can prevent extracting of male reliably, and can shorten the length of conductor coupling portion.
To achieve these goals, the invention provides a kind of conductor connect structure of power cable, it is characterized in that possessing:
Male, it is provided with positive shape fitting portion at leading section, is provided with the ring-type bead in the pars intermedia periphery, is provided with sleeve part in rearward end;
The anti-avulsion unit, it is inserted on the logical cylindrical shell in described male and is incorporated with the locking stop that can radially move, and is provided with and pushes this locking stop so that the pressing component that inner end is given prominence to from the inner peripheral surface of described cylindrical shell;
Electrode, its than accommodate this anti-avulsion unit accommodate the darker part of recess be provided with described male positive shape fitting portion chimeric cloudy shape fitting portion,
The sleeve part of described male is connected with the end of cable conductor,
Described anti-avulsion unit is fixed in the electrode,
In the positive shape fitting portion of described male passes through in the anti-avulsion unit, chimeric with the cloudy shape fitting portion of described electrode, be electrically connected thus, and, the ring-type bead of described male is passed through the interval of the locking stop of anti-avulsion unit when pressure is moved back this locking stop, the inner end of locking stop is positioned at the rear end face side of ring-type bead under the effect of the pressing force of pressing component, prevent extracting of male thus.
The present invention preferably provides a kind of conductor connect structure of power cable, it is characterized in that, possesses:
Male, it is provided with positive shape fitting portion at leading section, is provided with the ring-type bead in the pars intermedia periphery, is provided with sleeve part in rearward end, and in the periphery of described positive shape fitting portion the Elastic Contact ring is installed;
The anti-avulsion unit, it is inserted on the logical cylindrical shell in described male, be incorporated with a plurality of locking stop that can radially move across certain interval along Zhou Fangxiang, and be provided with and push these a plurality of locking stop so that the spring members that inner end is separately given prominence to from the inner peripheral surface of described cylindrical shell, and then, be formed with outer screw section at the outer peripheral face of described cylindrical shell;
Bucking electrode, its than accommodate this anti-avulsion unit accommodate the darker part of recess be provided with described male positive shape fitting portion chimeric cloudy shape fitting portion, and be formed with negative thread portion at described inner peripheral surface of accommodating recess,
The sleeve part of described male is connected with the compression of the end of cable conductor,
Described anti-avulsion unit is screwed into the negative thread portion of bucking electrode inner peripheral surface by the outer screw section of the outer peripheral face of described cylindrical shell, and is fixed in the bucking electrode,
The positive shape fitting portion of described male is by in the anti-avulsion unit, chimeric with the cloudy shape fitting portion of described bucking electrode, positive thus shape fitting portion and cloudy shape fitting portion are electrically connected via described Elastic Contact ring, and, the ring-type bead of described male is passed through the interval of the locking stop of anti-avulsion unit when pressure is moved back this locking stop, the inner end of locking stop is positioned at the rear end face side of ring-type bead under the effect of the pressing force of spring members, prevent extracting of male thus.
In syndeton of the present invention, preferably, the rear end face of ring-type bead and the front end face of locking stop and axis normal and form form one of at least in the outer peripheral face of ring-type bead and the inner peripheral surface of locking stop in the ring-type bead and press the inclined plane of moving back locking stop during by locking stop interval easily.
In addition, preferred in syndeton of the present invention, be formed with the notch part that is used to place the instrument that makes the rotation of anti-avulsion unit in the rear end of cylindrical shell.
In syndeton of the present invention, preferably, when the outer screw section screw thread of the cylindrical shell outer peripheral face of anti-avulsion unit is screwed into the negative thread portion of inner peripheral surface of bucking electrode, between the wall of accommodating the recess end of the front end face of the cylindrical shell of anti-avulsion unit and bucking electrode, clamp spring washer.
According to the present invention,, therefore can prevent extracting of male reliably owing to will be fixed on the ring-type bead engaging of the locking stop and the male of the anti-avulsion unit in the electrode.In addition, do not use tubaeform joint, just because of this, have length that can shorten conductor coupling portion and the advantage that can make the conductor coupling portion miniaturization.And then, if in advance with cylindrical shell and the combination of bucking electrode screw thread, then when needs are removed connection, make the anti-avulsion unit along the direction rotation of unclamping screw thread, remove the screw thread combination of the negative thread portion of the outer screw section of cylindrical shell and bucking electrode, and male is extracted with the anti-avulsion unit, thus, big withdrawal force need not be applied, just connection can be removed simply.
Description of drawings
Fig. 1 is the sectional arrangement drawing of an embodiment of the conductor connect structure of expression power cable of the present invention;
Fig. 2 is the sectional arrangement drawing of process of the conductor connect structure of expression assembly drawing 1;
The employed anti-avulsion of the conductor connect structure of Fig. 3 presentation graphs 1 unit (A) is sectional arrangement drawing, (B) is the drawing in side sectional elevation of the B-B line of (A);
Fig. 4 is the sectional arrangement drawing of other execution modes of the conductor connect structure of expression power cable of the present invention;
Fig. 5 is the sectional arrangement drawing of process of the conductor connect structure of expression assembly drawing 4.
Symbol description
10 cable conductors
12 cable insulations
14 stress cones
16 male
18 epoxy insulation bodies
20 bucking electrodes
22 anti-avulsion unit
24 positive shape fitting portions
Metastomium in the middle of 26
28 sleeve parts
30 Elastic Contact rings
32 ring-type beads
34 cylindrical shells
36 locking stop
38 endless grooves
40 garter springs
42 stoppers
44 outer screw sections
46 notch parts
48 accommodate recess
50 cloudy shape fitting portions
52 negative thread portions
54 walls
56 spring washers
Embodiment
Fig. 1~Fig. 3 represents one embodiment of the present invention.Among the figure, the 10th, cable conductor, the 12nd, cable insulation, the 14th, stress cone, 16 are mounted in the male of cable conductor 10 ends.In addition, the 18th, the epoxy insulation body, the 20th, one is located at the bucking electrode of epoxy insulation body 18 inside, and the 22nd, the anti-avulsion unit in the bucking electrode 20 of packing into.
Male 16 has positive shape fitting portion 24, middle metastomium 26, sleeve part 28 successively from front.Periphery at positive shape fitting portion 24 is formed with endless groove, and in this endless groove Elastic Contact ring 30 is installed.Elastic Contact ring 30 is with the commercially available commodity of trade names such as contact zones.In addition, the front at middle metastomium 26 is formed with ring-type bead 32.
Anti-avulsion unit 22 has described male 16 can insert logical cylindrical shell 34.On this cylindrical shell 34, be formed with a plurality of radially through holes along Zhou Fangxiang across certain interval, and locking stop 36 is packed in each through hole in the mode that can radially move into.As shown in Figure 3, be formed with ring-shaped continuous groove 38 on Zhou Fangxiang in the periphery of each locking stop 36 and cylindrical shell 34, and in this endless groove 38, garter spring 40 be installed with extended state.Therefore, each locking stop 36 is inwardly pushed by garter spring 40 all the time, thereby is in inner end from the outstanding state of the inner peripheral surface of cylindrical shell 34.
In addition, be formed with stopper 42 in the outer end of each locking stop 36, thus, will be no longer further outstanding after the outstanding certain limit of the inner end of locking stop 36 from the inner peripheral surface of cylindrical shell 34.The following setting of the thickness of locking stop 36 (radial dimension): during as shown in Figure 3 with the collision of the outer peripheral face of cylindrical shell 34, the size of the inscribed circle of a plurality of locking stop 36 is identical with the external diameter of the middle metastomium 26 of described male 16, or little more some than it at stopper 42.
In addition, it is more some greatly than the circumscribed circle of a plurality of locking stop 36 that the rear end side of cylindrical shell 34 forms external diameter, and be formed with outer screw section 44 on the outer peripheral face of this part.And then, be formed with the notch part 46 that is used to place the instrument that makes 22 rotations of anti-avulsion unit in the rear end of cylindrical shell 34.
Bucking electrode 20 have accommodate anti-avulsion unit 22 accommodate recess 48, this accommodate recess 48 the insides be formed with described male 16 positive shape fitting portion 24 chimeric cloudy shape fitting portion 50.In addition, be formed with the negative thread portion 52 of the outer screw section 44 that is screwed into described anti-avulsion unit 22 at the inner peripheral surface of accommodating recess 48.
For cable conductor 10 is connected with bucking electrode 20, at first, recess 48 is accommodated in 22 insertions of anti-avulsion unit, the outer screw section 44 of cylindrical shell 34 is screwed into the negative thread portion 52 of bucking electrode 20.This is screwed into the front end face that proceeds to cylindrical shell 34 and accommodates till wall 54 collisions of recess 48.Thus, anti-avulsion unit 22 coaxial shapes are fixed in the bucking electrode 20.On the other hand, the sleeve part 28 with male 16 is connected with the end compression of cable conductor 10.Also have, the operation that described anti-avulsion unit 22 is fixed in the bucking electrode 20 also can be carried out in factory, under this situation, can dispatch from the factory with the state that both are fixed.
Thereafter, the positive shape fitting portion 24 that makes male 16 is by in the anti-avulsion unit 22, and is chimeric with the cloudy shape fitting portion 50 of bucking electrode 20.Thus, Elastic Contact ring 30 is compressed on thickness direction, and positive shape fitting portion 24 and cloudy shape fitting portion 50 are electrically connected via Elastic Contact ring 30.In addition, if it is positive shape fitting portion 24 and cloudy shape fitting portion 50 is chimeric, then in this process, the ring-type bead 32 of male 16 is passed through the interval of the locking stop 36 of anti-avulsion unit 22 when pressure is moved back locking stop 36, therefore, by after become following state: the inner end of locking stop 36 is (the rear end face side of ring-type bead 32) on the middle metastomium 26 that is connected to male under the effect of the pressing force of garter spring 40 as shown in Figure 1.If become this state, then when withdrawal force put on the male 16, ring-type bead 32 was blocked (engaging) on locking stop 36, therefore, can prevent extracting of male 16.
Particularly as shown in the figure, if in advance the rear end face of ring-type bead 32 and the front end face of locking stop 36 are formed and axis normal, then can prevent extracting of male 16 more reliably.In addition, if in advance the outer peripheral face of ring-type bead 32 and the inner peripheral surface of locking stop 36 are formed inclined plane (conical surface or fillet surface) as shown in the figure, then in ring-type bead 32 during by locking stop 36 interval, can easily press and move back locking stop 36, thereby easily carry out the insertion of male 16.
In addition, owing to also can be in factory anti-avulsion unit 22 be fixed in the bucking electrode 20 it is dispatched from the factory, therefore the special anti-avulsion that does not so just need to implement is at the scene handled, as long as on-the-spot connection operation makes male 16 interior and chimeric with the cloudy shape fitting portion 50 of bucking electrode 20 by anti-avulsion unit 22, thereby can improve on-the-spot connection operation.And then, according to the present invention, do not use tubaeform joint, just because of this, also having can be with the advantage of conductor coupling portion miniaturization.
Though as above finish connection, after connection is finished, need to remove when connecting, after stress cone 14 is retreated, notch part 46 place tools in the rear end of cylindrical shell 34 make anti-avulsion unit 22 to the direction rotation of unclamping screw thread, remove the screw thread combination of outer screw section 44 and negative thread portion 52.So, even do not apply big withdrawal force, also can extract male 16, thereby can remove connection simply with anti-avulsion unit 22.
Also have, ring-type bead 32 both can be continuous on Zhou Fangxiang, also can be discontinuous on Zhou Fangxiang.In a word, as long as when withdrawal force puts on the male 16, can block on locking stop 36 getting final product.In addition, locking stop 36 not necessarily is provided with a plurality of, if can engage reliably with ring-type bead 32, then also can only be provided with one.
Fig. 4 and Fig. 5 represent other execution modes of the present invention.In Fig. 4 and Fig. 5, the part identical with Fig. 1~Fig. 3 marked identical symbol.The difference of the execution mode of this execution mode and Fig. 1~Fig. 3 is, for anti-avulsion unit 22 is fixed in the bucking electrode 20, and when the outer screw section 44 with the cylindrical shell outer peripheral face of anti-avulsion unit 22 is screwed into the negative thread portion 52 of inner peripheral surface of bucking electrode 20, between the wall 54 of the front end face of cylindrical shell 34 and bucking electrode 20, clamped spring washer 56.Spring washer 56 is compressed on axis direction by threaded together, plays the function of locking thread, therefore, can make the stationary state of anti-avulsion unit 22 and bucking electrode 20 keep stable, thereby be effective aspect the reliability that improves conductor coupling portion.
Conductor connect structure of the present invention is not only applicable to the middle of power cable and connects, but also is applicable to that the terminal of power cable connects.