JPH0684744U - Power cable heterogeneous common connection - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a connection portion that can be commonly used for connection of both different types and the same type of power cables. [Structure] The conductor connection receiving metal fitting (1) inside the insulating tube (5) of the power cable connection part has an inner diameter to which the contact (16) of the CV cable conductor connection end part (10) fits and the SL cable conductor The male terminal (33) of the connection end (30) is fitted with the large-diameter tubular portion (34) of the inner diameter, and conductor insertion holes (2) and (3) are opened on both end faces, and the male terminal (33) is formed. Contact (36) of the small diameter plug terminal (35) at the tip of
By having a configuration in which the central communication hole portion (4) of the inner diameter into which is fitted connects between the conductor insertion hole portions (2) and (3),
Can be used to connect both different and similar power cables.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection portion of a power cable.

[0002]

[Prior art]

 When connecting different types of cables such as a CV cable (crosslinked polyethylene insulated vinyl sheath cable) and an SL cable (oil-impregnated paper insulated cable), the conductor connection end of one of the SL cables is oiled. For this reason, the diameter of each insertion hole of the conductor connection receiving metal fitting for connecting the conductor connection end and the conductor connection end of the CV cable which does not require oil stopper is different for each cable conductor. For example, one of the CV cable connecting ends 50 is exposed by sequentially stripping off its sheath, insulating layer, etc., like the connection between the CV cable connecting end and the SL cable connecting end shown in FIG. A cylindrical wedge metal fitting 52 having a tapered outer peripheral surface having a plurality of vertical slits is fitted on the conductor connecting end portion 51, and a tubular clamp is formed on the outer peripheral surface of the cylindrical wedge metal fitting 52. The fitting 53 is fitted, the elastic contactor 54 is fitted in the groove of the outer peripheral surface of the tubular fastening 53, and the stress cone 55 is fitted on the CV cable connecting end 50 and pressed on the end. Fittings 56 are attached. On the other hand, the other end of the SL cable connecting portion 60 is fitted with a terminal metal fitting 62 on the conductor connecting end portion 61 which is exposed by sequentially stripping off the sheath, insulating layer and the like. The cable insulator 63 is covered with a heat-shrinkable tube 64 for oil stop and sealed and fixed with an epoxy resin seal 65 to provide oil stop treatment, and elastic contact is made with the groove on the peripheral surface of the small-diameter insertion terminal 66 at the tip of the terminal fitting 62. A child 67 is attached, a stress cone 68 is fitted on the SL cable connection end 60, and a holding metal fitting 69 is attached to the end.

The conductor connection receiving metal fitting 70 for connecting the conductor connection end 51 of the connection end 50 of the CV cable and the conductor connection end 61 of the SL cable connection end 60 has a CV cable connection end at one end. An insertion hole 71 for a CV cable conductor having an inner diameter φa and a length La to which the elastic contact 54 of the conductor connection end portion 51 of 50 is fitted is provided, and the conductor connection end portion of the SL cable connection end portion 60 is provided at the other end. Inner diameter φb for fitting 61 terminal fitting 62, large diameter insertion hole 72 for SL cable terminal fitting of length Lb, and inner diameter φc for fitting elastic contact 67 of small diameter inserting terminal 66 The conductor connection receiving metal fitting 70 configured to have the small diameter insertion hole 73 for the Lc SL cable terminal metal fitting is used, and the CV cable conductor is inserted into the CV cable conductor insertion hole 71 of the inner diameter φa at one end of the conductor connection receiving metal fitting 70. Insert the connecting end 51 and the elastic contact 54 While making contact with the inner peripheral surface of 71 and inserting the terminal fitting 62 of the SL cable conductor connecting end 61 into the large diameter insertion hole 72 for SL cable terminal fitting of inner diameter φb at the other end, the SL cable terminal fitting of inner diameter φC By inserting the elastic contact 67 of the small diameter insertion terminal 66 of the SL cable conductor connecting end terminal fitting 62 into the small diameter insertion hole 73, and contacting the elastic contact 67 with the inner peripheral surface of the small diameter insertion hole 73. , The conductor connection end 51 of the connection end 50 of the CV cable and the conductor connection end 61 of the SL cable connection end 60 are connected, and an epoxy resin insulation cylinder 74 is provided on the outer circumference of the conductor connection receiving bracket 70. It is installed.

[0004]

[Problems to be solved by the device]

 The connection portion of the conventional power cable as described above includes the inner diameter φa and the length La of the CV cable conductor insertion hole 71 of the conductor connection receiving fitting 70, and the inner diameter φb of the large diameter insertion hole 72 for the SL cable terminal fitting. Since the length Lb, the inner diameter φc and the length Ls of the small-diameter insertion hole 73 differ depending on the type of cable to be connected, the conductor connection bracket 70 must be manufactured according to the type of cable to be connected. For example, when connecting a CV cable of the same type and a CV cable, the CV cable of the left and right sides of the conductor connecting bracket 70 shown in FIG. Not only the conductor insertion hole 71, but also the left insertion holes 72 and 73 must be formed in the CV cable conductor insertion hole of inner diameter φa and length La, and the SL cable and SL cable. In the case of the connection, it suffices to provide a large-diameter insertion hole 72 with an inner diameter φb and a length Lb and a small-diameter insertion hole 73 with an inner diameter φc and a length Lc in the insertion holes on both the left and right sides of the conductor connection receiving bracket 70 of FIG. However, the right side insertion hole must be formed with a large diameter insertion hole and a small diameter insertion hole as well. Since the conductor connecting bracket 70 is applied to the connecting portion by being integrated with or combined with an insulation processing member such as an epoxy resin insulating cylinder 74, the conductor connecting bracket 70 is used when the type of the cable to be connected is different as described above. Not only must the insulation processing members such as the epoxy resin insulation cylinder 74 be changed, but it is necessary to prepare a connection part that matches each type of cable to be connected, which not only increases costs. However, there was a problem that its inventory management became complicated.

The present invention solves the above-mentioned problems and enables common use for connection of different types of power cables and connection of the same type of power cables. It is intended to provide a section.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the power cable of the present invention has a common connection portion of different kinds, which is formed by connecting the conductor insertion holes 2 and 3 opened on the end faces 2a and 3a on both sides and the conductor insertion holes 2 and 3 between them. A cylindrical conductor connection receiving metal fitting 1 provided with a central communication hole portion 4 communicating with each other, and an insulating cylinder 5 surrounding the conductor connection receiving metal fitting 1 are provided, and the inner diameters of the conductor insertion hole portions 2 and 3 are The inner diameter is such that the elastic contact 16 of the CV cable conductor connecting end portion 10 fits and the large diameter cylindrical portion 34 of the male terminal 33 of the SL cable conductor connecting end portion 30 fits, and the central communication hole portion is formed. The inner diameter of 4 is formed so as to fit the contact 36 of the small diameter insertion terminal portion 35 at the tip of the male terminal 33.

[0007]

[Action]

 The tubular conductor connection bracket 1 is used for connecting different types of power cables, for example, for connecting the CV cable and the conductor connection end of the SL cable, and for connecting power cables of the same type, for example, CV cable and CV cable. It can also be used for connecting conductor connecting ends and connecting conductor connecting ends of SL cables and SL cables, and the insulating cylinder 5 surrounding the conductor connecting bracket 1 can be used for any connection. The stress cones at the ends of the cable connection fit into the openings at both ends. The power cable connecting portion provided with the conductor connection receiving metal fitting 1 and the insulating tube 5 of the present invention can be commonly used for connection of both different and similar power cables.

When connecting different types of power cables, for example, CV cables and SL cables, the conductor insertion hole portions 2 and 3 opening at both ends of the conductor connection receiving metal fitting 1 have CV cables in one conductor insertion hole portion 3 thereof. The contact 16 of the conductor connecting end 10 of the above is fitted, the contact 16 contacts the inner peripheral surface of the conductor inserting hole 3 and is electrically connected, and the other conductor inserting hole 2 The large-diameter cylindrical portion 34 of the male terminal 33 of the conductor connection end 30 of the SL cable is fitted to the central communication hole 4, and the contact 36 of the small-diameter insertion terminal 35 at the tip of the male terminal 33 is fitted to the central communication hole 4. By fitting and contacting the contact 36 with the inner peripheral surface of the central communication hole portion 4 and electrically connecting them, different types of power cables are connected.

When connecting power cables of the same type, for example, a CV cable and a CV cable, one CV cable is inserted into one conductor insertion hole portion 3 of the conductor insertion hole portions 2 and 3 opened at both ends of the conductor connection receiving metal fitting 1. The contact 16 of the conductor connecting end 10 is fitted and brought into contact with the inner peripheral surface of the conductor insertion hole 3 in the same manner as described above. Similarly to the conductor connecting end 10 of the CV cable, the contact 16B of the conductor connecting end 10B of the other CV cable is fitted into the other conductor inserting hole 2 and the inside of the conductor inserting hole 2 is inserted. By contacting the peripheral surface, the same type of power cable is connected.

When connecting SL cables of the same kind to each other, the male terminals 33 of the conductor connecting ends 32 of the conductor connecting ends 30 of the respective SL cables are opened on both left and right sides of the conductor connecting bracket 1. Insert into the conductor insertion holes 2 and 3 respectively, fit the small diameter insertion terminal portions 35 at the tips of the male terminals 33 into the central communication hole portion 4 of the conductor connection receiving metal fitting 1 from both sides, and insert each small diameter insertion portion. By bringing the elastic contactor 36 of the terminal portion 35 into contact with the inner peripheral surface of the central communication hole portion 4, both SL cables of the same type are connected.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross section of a main part of a heterogeneous and same type common connection portion of the present invention, and FIG. 2 shows an end face thereof. Reference numeral 1 denotes a tubular conductor connection receiving fitting made of a conductive metal, which has a conductor insertion hole portion 2 opening at one end face 2a thereof and a conductor insertion hole portion 3 opening at the other end face 3a thereof. A central communicating hole portion 4 is provided in the central portion for communicating between the conductor inserting hole portions 2 and 3.

The inner diameter φ2 and the length L2 of the one conductor insertion hole 2 and the inner diameter φ3 and the length L3 of the other conductor insertion hole 3 are the conductor connection end portion of the CV cable shown in FIG. A large-diameter cylindrical portion of which the outer diameter φcv of the elastic contactor 16 of 10 is a fit inner diameter and a length, and the outer diameter φL of the male terminal 33 of the conductor connecting end 30 of the SL cable shown in FIG. Form the inside diameter and length that 34 can fit. Further, the central communication hole portion 4 has its inner diameter φ4 fitted with the elastic contact 26 of the outer diameter φS of the small diameter insertion terminal rod portion 35 of the male terminal 33 of the SL cable conductor connecting end portion 30 shown in FIG. The inner diameter to be obtained is L4, and the length L4 is small when the two SL cable conductor connecting ends 30, 30 are connected, and the male terminals 33, 32 of the respective SL cable conductor connecting ends 30, 30 have a small diameter insertion terminal portion 35. , 35 are formed so that they can be inserted into the central communication hole 4 from both sides at the same time, that is, at least twice the length of the small diameter insertion terminal 35.

An epoxy resin molded insulating cylinder 5 is provided in close contact with the outer periphery of the conductor connection receiving fitting 1. Numerals 6 and 7 are stress cone fitting holes opened at both end surfaces of the insulating cylinder 5, and the inner peripheral surface thereof is formed into a tapered surface in close contact with the tapered outer peripheral surface of the stress cone. Reference numeral 8 is a protective metal cylinder covering the outer peripheral surface of the insulating cylinder 5, 9 is a flange metal fitting integrally attached to both ends of the insulating cylinder 5, and 9a is a bolt screw hole provided on the end surface of the flange metal 9.

FIG. 3 shows the conductor connecting end 10 of the CV cable and the conductor connecting end 30 of the SL cable. The CV cable conductor connecting end 10 is formed by sequentially stripping the sheath and the insulating layer 11. A cylindrical wedge metal fitting 13 is fitted on the exposed conductor connecting end 12, and a contact ring 15 is fitted and fixed on the tapered outer peripheral surface 14 having a plurality of vertical slits formed on the outer peripheral surface of the cylindrical wedge metal fitting 13. An elastic contact 16 having an outer diameter φcv is provided in the groove on the outer peripheral surface of the contact ring 15, a stress cone 17 is put on the stepped-off insulating layer 11 and a holding metal fitting 18 is attached to form a CV cable conductor connecting end 10. To be done.

In the SL cable conductor connecting end 30, a male terminal 33 is fitted to the conductor connecting end 32 in which the sheath and the insulating layer 31 are sequentially stripped and exposed. This male terminal 33 has a large-diameter cylindrical portion 34 having an outer diameter φL in the rear half portion, and a resilient contact 36 having an outer diameter φS provided in the groove on the peripheral surface of the small-diameter insertion terminal portion 35 in the front half portion. The large-diameter cylindrical portion 34 is fitted and fixed to the conductor connecting end portion 32. In this way, the oil-sealing heat-shrinkable tetron tape 37 is covered over the insulating layer 31 from the rear portion of the male terminal 33 attached to the conductor connecting end portion 32 to shrink the end portion, and the end portion is sealed and fixed with the epoxy resin-impregnated tape 38. The conductor connection end 30 of the SL cable is formed by covering the insulating layer 31 that has been oil-stopped and covered with the stress cone 39 with the pressing metal fitting 40.

To connect the CV cable conductor connecting end 10 and the SL cable conductor connecting end 30 to each other, the CV cable conductor connecting end 10 is a conductor of the CV cable conductor connecting end 10 shown in FIG. When the connection end 12 is inserted into the conductor insertion hole 3 which opens to the right of the conductor connection receiving metal fitting 1 shown in FIG. 1, the contact 16 of the conductor connection end 12 is inserted into the conductor insertion hole 3. The stress cone 17 of the CV cable conductor connection end 10 is elastically and closely connected electrically to the peripheral surface, and the stress cone 17 of the CV cable conductor connection end 10 is closely packed in the stress cone fitting hole 7 of the insulating cylinder 5 on the outer periphery of the conductor connection receiving metal fitting 1. To fit.

Further, the SL cable conductor connecting end portion 30 has the male terminal 33 of the conductor connecting end portion 32 of the SL cable conductor connecting end portion 30 shown in FIG. When inserted into the opening on the left side, the large-diameter cylindrical portion 34 at the rear of the male terminal 33 fits into the conductor insertion hole portion 2 of the conductor connection receiving metal fitting 1, and the small-diameter insertion terminal portion 35 at the tip of the male terminal 33 connects to the conductor. The contact 36 of the small-diameter insertion terminal portion 35 is fitted into the central communicating hole portion 4 of the receiving metal fitting 1 and is elastically and closely connected to the inner peripheral surface of the central communicating hole portion 4 to be electrically connected. At the same time, the stress cone 39 of the SL cable conductor connecting end portion 30 is closely fitted into the stress cone fitting hole 6 of the insulating cylinder 5 on the outer circumference of the conductor connection receiving fitting 1. In this way, the CV cable conductor connecting end portion 10 and the SL cable conductor connecting end portion 30 shown in FIG. 3 are connected by the conductor connection receiving metal fitting 1 shown in FIGS.

Instead of connecting different types of CV cables and SL cables as described above, the same type of CV cable conductor connecting end 10 and CV cable conductor connecting end 10B shown in FIG. To connect, one of the CV cable conductor connecting ends 10 is inserted into the conductor inserting hole 3 opened to the right side of the conductor connecting bracket 1 shown in FIG. The contactor 16 is brought into close contact with the inner peripheral surface of the conductor insertion hole portion 3, and the stress cone 17 is fitted into the stress cone fitting hole 7 opening to the right side of the insulating cylinder 5. As for the other CV cable conductor connecting end 10B, the conductor connecting end 12B is inserted into the conductor inserting hole 2 opened to the left side of the conductor connecting receiving tool 1 like the CV cable conductor connecting end 10 described above. Then, the contactor 16B is brought into close contact with the inner peripheral surface of the conductor insertion hole portion 3, and the stress cone 17B is fitted to the stress cone fitting 6 opening to the left side of the insulating cylinder 5. In this way, the CV cable conductor connection end 10 and the CV cable conductor connection end 10B of the same type can be connected by the conductor connection receiving fitting 1 for connecting the CV cable and the different type cable of the SL cable.

Instead of connecting the CV cable conductor connecting end and the CV cable conductor connecting end of the same kind as described above, in order to connect the SL cable conductor connecting end and the SL cable conductor connecting end of the same kind, Each of the two SL cable conductor connecting ends 30, 30 having a male terminal 33 on the conductor connecting end 32 like the SL cable conductor connecting end 30 shown in FIG. Male terminals 33, 33 are inserted into the conductor insertion holes 2, 3 opened on the left and right sides of the conductor connection receiving metal fitting 1 shown in FIG. 1, respectively, and the small-diameter insertion terminal portions at the tips of the male terminals 33, 33 are inserted. By fitting 35 and 35 into the central communication hole 4 of the conductor connection receiving fitting 1 from both sides, the contact 36 of each small-diameter insertion terminal 35 of each SL cable is attached to the inner peripheral surface of the central communication hole 4. They make contact and are electrically connected.

FIG. 4 shows a cross section of a connecting portion where different types of cables such as the CV cable and the SL cable are connected as described above, and the same reference numerals as those in FIGS. 1, 2, and 3 denote the same parts. Show. Reference numeral 1 is a conductor connection receiving fitting, and 5 is an epoxy resin molded insulating cylinder. The conductor connecting end portion 12 of the CV cable conductor connecting end portion 10 is inserted into the conductor inserting hole portion 3 on the right side of the conductor connection receiving fitting portion 1 and comes into contact therewith. The child 16 contacts the inner peripheral surface of the conductor insertion hole portion 3, and the stress cone 17 is fitted into the stress cone fitting hole of the insulating cylinder 5. Reference numeral 19 is a semiconductive tape winding layer on the outer semiconductive layer on the insulating layer 11 stripped off at the connection end of the CV cable, and 20 is an outer sheath. Reference numeral 21 is a stress cone pressing pipe, the tip of which abuts against the step 22 of the stress cone 17, and the spring 23 mounted on the outer circumference of the stress cone pressing pipe 21 contacts the step 24 of the stress cone pressing pipe 21. The stress cone 17 is pressed by pressing the spring 23 with the tubular tightening fitting 25 provided outside thereof. 26 is a heat-shrinkable tube that covers the cable case 20 from the rear of the tubular fastening member 25 to seal the gap at the rear end, and 27 is a ground wire pressing band. The flange portion 28 of the tubular tightening metal fitting 25 is attached by screwing a tightening bolt 29 into a bolt screwing hole 9a on the end surface of the flange metal fitting 9 at the end of the insulating cylinder 5.

The male terminal 33 of the conductor connecting end portion 32 of the SL cable conductor connecting end portion 30 is inserted into the conductor inserting hole portion 2 on the left side of the conductor connecting receiving metal fitting 1, and the large-diameter cylindrical portion 34 at the rear portion thereof is inserted. The small diameter insertion terminal portion 35 at the tip end is fitted into the central communication hole portion 4 of the conductor connection receiving metal fitting 1, the contactor 36 contacts the inner peripheral surface of the central communication hole portion 4, and the stress cone 39 is Fit into the stress cone fitting hole of the insulating cylinder 5. 41 is the outer sheath of the SL cable conductor connection end 30, 42 is the stress cone pressing pipe, 43 is the step of the stress cone 39 pressed by the tip of this pressing pipe 42, 44 is the pressing spring, and 45 is the tubular tightening. Metal fitting, 46 is a heat-shrinkable tube that seals the gap at the rear end, 47 is a ground wire pressing band, and the flange portion 48 of the tubular tightening fitting 45 is the tightening bolt 49 and the flange fitting at the end of the insulating cylinder 5. It is attached to 9. As described above, different kinds of CV cables and SL cables are connected by the conductor connection receiving fitting 1 inside the insulating cylinder 5.

FIG. 5 is a cross-sectional view of a connecting portion in which a CV cable and a CV cable of the same type are connected by the conductor connection receiving metal fitting 1 inside the insulating cylinder 5, and FIGS. The same reference numerals denote the same parts. One CV cable conductor connecting end portion 10 on the right side in the figure is inserted into the conductor connection receiving tool 1 and the opening on the right side of the insulating tube 5 similarly to the CV cable conductor connecting end portion 10 shown in FIG. The other CV cable conductor connecting end portion 10B on the left side of the drawing has a conductor connecting end portion 12B on the left side of the conductor connecting hole 1 of the conductor connection receiving metal fitting 1 like the right side CV cable conductor connecting end portion 10. 2, the contactor 16B contacts the inner peripheral surface of the conductor insertion hole 2, and the stress cone 17B fits into the stress cone fitting on the left side of the insulating cylinder 5. 21B is a stress cone pressing pipe, 23B is a spring, 25B is a tubular fastening fitting, 26B is a heat shrink tube, 28B is a flange portion of the tubular fastening fitting 25B, and 29B is a fastening bolt. As described above, the CV cable and the CV cable of the same type are connected by the conductor connection receiving metal fitting 1 inside the insulating tube 5.

[0023]

[Effect of device]

 As described above, the power cable of the present invention has the same type of common connection part in which the contact of the CV cable conductor connection end fits the conductor connection receiving metal fitting inside the insulating tube and the SL cable conductor connection end. Two conductor insertion holes with an inner diameter into which the large-diameter cylindrical portion of the male terminal fits open on both sides, and the center communication hole of the inner diameter into which the contact of the small-diameter insertion terminal portion at the tip of the male terminal fits The two conductor insertion holes are communicated with each other, and the contact of the CV cable conductor connection end or the large-diameter cylindrical portion of the male terminal of the SL cable conductor connection end is fitted into the conductor insertion hole, and the center is inserted. Since the contact of the small diameter insertion terminal of the SL cable conductor connection end is fitted in the communication hole, it is possible to connect the conductor connection end of different power cables of CV cable and SL cable. Not only CV Cave It can also be used to connect the conductor connection end of the same type of power cable of CV cable and CV cable or SL cable and SL cable, and can also be used to connect power cables of different types and the same type. is there.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention.

FIG. 2 is an end view of the essential part of one embodiment of the present invention.

FIG. 3 is a diagram showing connection end portions of a CV cable and an SL cable.

FIG. 4 is a sectional view of a CV-SL dissimilar cable connection part.

FIG. 5 is a cross-sectional view of a CV-CV homogenous cable connection portion.

FIG. 6 is a diagram showing a conventional example.

[Explanation of symbols]

 1: Conductor connection bracket 2, 3: Conductor insertion hole 4: Central communication hole 5: Insulating cylinder 10, 10B: CV cable conductor connection end 16, 16B: Contact 30: SL cable conductor connection end 33: Male terminal 35: Small diameter insertion terminal part 36: Contact

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsugu Saito 1-8-1, Hisamoto, Takatsu-ku, Kawasaki-shi Asahi Electric Co., Ltd. (72) Masatoshi Maruyama 1-8-1, Hisamoto, Takatsu-ku, Kawasaki-shi Asahi Electric Within the corporation

Claims (1)

[Scope of utility model registration request] 1. A contactor (1) for a CV cable conductor connecting end (10).
6) Fits inside diameter and SL cable conductor connection end (30)
Of the male terminal (33) of the inner diameter where the large-diameter cylindrical portion (34) fits, the end face opening conductor insertion holes (2), (3), and both conductor insertion holes (2), (3) Communication Cylindrical conductor connection bracket (1) provided with a central communication hole (4) of inner diameter into which the contact (36) of the small diameter insertion terminal (35) at the tip of the male terminal (33) fits
And an insulating tube provided outside the conductor connection bracket (1)
(5) A heterogeneous common connection part of a power cable characterized by comprising: