JP3210522B2 - Connection device for power cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure of a cable conductor in an intermediate connection portion of a power cable, and more particularly, to a structure in which a conductor joint is formed in a cylindrical shape and a band-shaped conductive member is provided on the inner and outer peripheral surfaces of the conductor joint. The present invention relates to a power cable connecting device that can be set to conduct to both the conductor connector and the high voltage shield electrode of the connecting portion.

[0002]

2. Description of the Related Art A slip-on type conductor connecting means for connecting a power cable has been conventionally known. As means for connecting the cable, for example, JP-A No. 2-15
No. 5,415, and Japanese Utility Model Laid-Open No. 2-77868 are known. The conventional power cable connecting device has a configuration as shown in FIG. 8, in which copper conductor connectors 2 are fixed to connection ends of two cable conductors 1 to be connected. Provided. In the conductor connector 2, a large-diameter compression section 3 is arranged on the cable side, an opening 4 for inserting a cable conductor is provided at the center of the compression section, and the cable conductor 1 is inserted into the opening 4. It is compressed to obtain conductivity between the conductor and the conductor connector.

At the tip of the conductor connector 2, an insertion head member 5 is provided so as to protrude. When the insertion head member 5 is inserted into the conductor joint 10, a locking step 7 of the head 6 is provided. Is locked to the locking step 12 of the conductor joint 10 so that the conductor connector is fixed to the conductor joint. The conductor joint 10 into which the conductor connector is inserted has a large number of narrow strip-shaped members arranged in a substantially annular shape, and a ring-shaped spring 14 is arranged around the member so as to be tightened from the outside. are doing. A concave portion 11 is provided on the inner surface of each of the substantially annular conductor joint members, and a conductor connecting insertion member 5 is provided in a large-diameter hollow portion formed by the concave portion 11.
Is to be accommodated.

[0004] The conductor connector as described above is also integrally fixed to the other cable conductor connected to the conductor joint,
The conductor connector provided at the connection end of the two cable conductors is
The connection part can be formed by inserting and fixing to the conductor joint 10 respectively. Then, by using the conductor connector connected to the conductor joint, electrical continuity between the two cables can be obtained, and the effect of fixing and holding is exhibited in accordance with the pulling force applied to the cable. be able to. The power cable connecting device as shown in FIG. 8 is also used for a terminal connecting portion of the power cable, and one conductor connector is previously combined with the conductor joint 10 and later the other is connected to the other. The connection can be made by inserting the conductor connector 2.

[0005]

However, as shown in FIG. 8, the conductor connectors 2 attached to the connection ends of the cables are inserted into the conductor joint 10, and the two members are locked. When a mechanism for locking the step portion is used, there is a problem that play is generated at the connection portion. The problem that the backlash occurs occurs in a state described in detail in the example shown in FIG. In the example shown in FIG. 9, the conductor joints 2 and 2a provided on the cable conductors 1 and 1a on both sides are inserted into the conductor joint 10, respectively. The conductor connectors 2 and 2a have the same shape, and use means for inserting and fixing from both sides of a conductor joint having the same configuration as that shown in FIG.

In the example shown in FIG. 9, the small diameter portion 8 formed between the main body of the conductor connector 2 and the insertion head member 5 is set to have a length L, and the small diameter portion 8 is formed. Accordingly, the projection 13 at the insertion-side end of the conductor joint 10 is positioned so as to be fixedly held in a state in which the engaging step portions provided on both sides are engaged. However, when the above-described locking means is used, in order to lock the protrusion of the conductor joint 10 to the small diameter portion of the conductor connector, the length L1 of the protrusion 13 is set to L. > L1, and there is a problem that play is left in a portion where the conductor connector 2 is inserted into the conductor joint 10 and fixed.

As shown in FIG. 9, when the conductor connector 2 is inserted into the conductor joint 10, the head 6 (large diameter portion) of the insertion head member 5 is attached to the conductor joint 10. Protrusion 13
Then, it is made to invade in a state where it spreads out, and thereafter, it is closed again with the protrusion 13 being located at the small diameter portion of the conductor connector. At that time, since the conductor joint is inclined, the length L1
It is necessary to set the lengths of the respective members so that the projection of the diagonal line has a length L2 and the length L of the small diameter portion 8 satisfies the relationship of L> L2. Therefore, in the power cable connecting device, a large play is left at the combination position of the locking steps of each member.

When the conductor connector is inserted into and fixed to the conductor joint, as shown in FIG. 9, when the axes are not coincident with each other or when a force is applied from the side, the conductor is There is a problem that the engagement state of the conductor connector with respect to the joint is not properly set. And, when the strip-shaped member of the conductor joint is inclined with respect to the conductor connector, the action of the locking step portions to be locked with each other cannot be sufficiently exhibited, and the electrical conduction is not achieved. The problem that the state cannot be set remains. Furthermore, in the connection portion, only the portions locked by both locking steps bear the stress applied to the cable against the tension between the conductor connector and the conductor joint. Since the conductor connector and the conductor joint are made of copper, there is also a problem that the strength is relatively small with respect to the tensile force.

Therefore, in order to solve the above-mentioned problems, the present inventors, as shown in FIG. 10, attached a conductor connector inserted from both sides of a conductor joint to a tip of each connector. Proposal has been made of a means in which a locking means is provided in the portion so that the conductor joint can set only electrical conduction. In the example shown in FIG. 10, the mechanism for fixing the conductor connector 2 to the connection end of the cable conductor is performed in the same manner as in the conventional example. It is inserted into the opening of the conductor connector and the compression part is compressed and fixed. A conductor connector 2a is also attached to the opposing cable conductor 1a. A member for inserting the cable conductor 1 is provided at one end of the conductor connector, and a conductor joint 10 is provided at the other end. The insertion heads 6 and 6a for insertion into the cylinder are provided in a substantially cylindrical shape.

In the conductor joint 10 for inserting and holding the conductor connector from both sides, the inner surface is formed as a smooth inner surface into which a cylindrical insertion tip is inserted. As described in the above, there is no mechanism provided for locking and holding by providing irregularities. Further, the conductor joint 10 is formed in a cylindrical shape by combining copper strip-shaped members in the same manner as in the case of the conventional connection portion, and a plurality of ring-shaped springs 14 are arranged around the cylindrical joint, The inserted insertion tip is tightened from the outside to fix and hold the conductor connector. And between the conductor joint and the conductor connector,
Only electrical continuity can be obtained,
The tension applied to the cable is borne by a connecting member described later.

[0011] The connecting member provided on the conductor connector includes a concave hole 1 provided in each of the insertion heads 6 and 6a of the conductor connector.
The insertion-side connector 16 and the locking-side connector 16a are screwed and attached to 5, 15a, respectively. The two members constituting the connection member are made of a material having high strength such as iron. It can be configured using. Then, the head member 17 of the insertion-side connector 16 provided on one conductor connector 2 is inserted into the insertion hole 19 of the locking-side connector 16a provided on the other conductor connector 2a, and inserted into the conductor joint. The head of the conductor connector is connected. When connecting the conductor connectors 2 and 2a arranged opposite to each other using the connectors 16 and 16a on the insertion side and the locking side, the insertion holes 19 provided in the locking side connector 16a are provided. Then, the head member 17 provided on the insertion-side connector 16 is inserted, and the locking member 18 provided on the head member 17 is inserted into the stepped portion 1 of the insertion hole 19.
In the state of being engaged with 9a, the locked state of both connectors is set. In the example shown in FIG. 10, the locking member 18 is attached to the head member 17 using a biasing means such as a spring, and when the head member is inserted into the insertion hole, the locking member is locked. Since the member is expanded with respect to the step portion to set a fixed state, the connecting member has a structure which cannot be removed once connected.

However, even when the connection structure as shown in FIG. 10 is used, the conductor joint is similar to the conventional joint,
It is necessary to be configured as a strip-shaped member, and it is very troublesome to combine the strip-shaped members in a state of being tightened by a spring. further,
In order to arrange the joint at the connection part of the cable and to set the conduction state in a good state with the high-voltage shield electrode located at the outer peripheral part of the conductor joint, the configuration of the conduction connection part becomes complicated. There is a problem.

[0013]

An object of the present invention is to solve the above-mentioned problems of the conventional connection device, in which the conductor joint is made of a conductive material in a cylindrical shape, and the inner surface of the hole into which the conductor connector is inserted, and the high pressure At the outer peripheral portion corresponding to the shield electrode, a band-shaped conductive member is integrally attached, and by utilizing the elasticity of the band-shaped conductive member, the conductor connector and the high-voltage shield member located on the inner and outer surfaces of the cylindrical joint member, respectively. It is therefore an object of the present invention to provide a power cable connecting device capable of satisfactorily performing an operation of obtaining electrical conduction and simplifying the structure of a cylindrical joint member.

[0014]

SUMMARY OF THE INVENTION According to the present invention, a conductor connector is fixed to each of the distal ends of two cable conductors, and one of the insertion head members projecting from the distal ends of each of the conductor connectors is locked. Side connectors are provided on the other side with insertion-side connectors, respectively, and the conductor joint is positioned and provided with respect to a high-voltage shield electrode fixed and provided inside the reinforcing insulator, and the conductor connector is inserted into the conductor joint. The present invention also relates to a power cable connecting device for connecting the conductor connector in such a manner as to obtain electrical continuity of a cable conductor to be connected. In the present invention, the conductor connector is directly connected to each other by an engagement means provided at a distal end thereof, and the conductor joint is configured as a cylindrical member, and an inner peripheral surface and an outer periphery of the conductor joint are formed. On the surface, a band-shaped conductive member is attached so as to protrude from the inner peripheral surface and the outer peripheral surface of the conductor joint, respectively, and conducts between the conductor joint and the high-voltage shield electrode by the band-shaped conductive member, By inserting the conductor connector into the conductor joint, the band-shaped conductive member is compressed, and a conduction path from one conductor connector through the conductor joint to the other conductor connector is secured.

[0015]

[0016]

As described above, the connection of the power cable is performed only by inserting the conductor connector attached to the distal end portion of the cable conductor into the joint member from both sides and engaging with the insertion side provided on the conductor connector. The stop-side connector can be engaged to form a connection portion having high mechanical strength. In addition, the conductor joint is formed in a cylindrical shape with a conductive metal member such as copper, and a conductive state is set via a band-shaped conductive member with respect to a conductor connector inserted into a through hole of the cylindrical joint member. Therefore, the configuration of the cylindrical joint member can be simplified. And
In the cylindrical joint member of the present invention, the band-shaped conductive member is integrally disposed on the outer peripheral portion of the cylindrical joint member corresponding to the high-voltage shield electrode disposed at the center of the connection portion or the like. Can be set only by inserting the inside of the high-voltage shield electrode, and the configuration for that can be simplified.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a connecting device for a power cable according to the present invention. The example shown in FIG. 1 shows a configuration of a cable connection portion 20 to which the connection structure of the present invention can be applied. As in the case of the conventional cable connection portion, the conductors 22 of the two cables 21, Conductor connectors 23 and 23a are integrally provided at the tip of 22a. Then, the conductor connectors 23 and 23a are inserted into the cylindrical joint member 40 to constitute means for setting the conductive state of the conductors via the cylindrical joint member. In the cable connection portion 20, a high-voltage shield electrode 30 is arranged at a position corresponding to the cylindrical joint member 40, and a reinforcing insulator 31 integrally formed in a cone shape with a predetermined length is arranged around the high-voltage shield electrode 30. . The reinforcing insulator 31 is provided by mounting a pre-molded molded body or by integrally casting a resin material around a connection portion into a cone shape.

Around the reinforcing insulator 31, a shielding layer 3
2, a waterproof mixture 33 is formed at a predetermined thickness on the outer periphery thereof, and a metal protective tube 3 is formed on the outer periphery of the waterproof mixture 33.
4 is arranged. In addition, an insulating tube 35 is disposed at a predetermined position with respect to the protective tube 34, and a terminal seat 36 is disposed with respect to the protective tube, and a means for connecting to a ground is provided. Further, a waterproof layer 37 is disposed so as to cover both ends of the insulating tube 35 and a connection portion with the cable sheath, and the waterproof layer 37 is constituted by means such as winding an insulating tape. This constitutes a means for preventing moisture and the like from entering the air. Although the cable shown in FIG. 1 is configured with a corrugated exterior, the cable connection section can be configured for any high-voltage power transmission cable. .

In the cable connecting portion 20 as described above, between the conductor connectors 23 and 23a and the cylindrical joint member 40, which are respectively arranged with respect to the connection ends of the cable conductors 22 and 22a, and between the cylindrical joint member 40 A connection means as shown in FIG. 2 is provided to set a conductive state between the high voltage shield electrode 30 and the high voltage shield electrode 30. In the example shown in FIG. 2, the cylindrical joint member 40 has a configuration as shown in FIG. 3, and a conductor connector is connected to a cylindrical member made of a metal having good conductivity such as a copper alloy. The one provided with the through hole 41 for inserting the tip end is used. On the inner peripheral surface 42 corresponding to the through hole 41 of the cylindrical joint member 40, a plurality of ring-shaped inner peripheral grooves 43 are arranged, and band-shaped conductive members 50 to 53 are attached to the inner peripheral grooves. And used as a conductive member between the conductor connector inserted into the through hole and the main body of the cylindrical joint member. Further, the cylindrical joint member 40
An outer peripheral groove 48 is also provided at a predetermined position on the outer peripheral surface 47 of the main body in a state of being cut into the main body, and a band-shaped conductive member 54 is attached to the outer peripheral groove 48, and the band-shaped conductive member 54 is formed into a cylindrical shape. Joint member 40 and high voltage shield electrode 30
It is configured as a conductive member between the two.

In the connecting device of the present invention shown in FIG. 2, the conductor connecting member 23 and the cylindrical connecting member 40 are connected to each other.
The distal end of 23a is inserted, and the two conductor connectors are arranged so as to abut each other. However, in the present invention,
As shown by a chain line in the figure, it is possible to provide an engaging means at the tip of the conductor connector and apply a means for directly connecting. As means for connecting the conductor connectors to each other, for example, a fixing means as described in FIG. 10 can be used. Although a detailed configuration is omitted in FIG. 2, when a connecting means as shown in FIG. 10 is formed, an insertion head of a conductor connector to be inserted into the cylindrical connecting member to face each other is used. The insertion-side connector and the locking-side connector are attached to the respective parts. When the insertion heads of the two conductor connectors abut against each other, the connectors on the insertion side and the locking side are fixed to each other, so that a tensile force in the cable length direction is applied to the cable connection portion. In this state, the connection state can be maintained satisfactorily.

When the connecting portion as shown in FIG. 2 is formed by using the cylindrical joint member 40 as shown in FIG. 3, the insertion ends of the conductor connectors 23 and 23a are connected to the cylindrical joint member. The band-shaped conductive member 50 protrudes from the inner peripheral surface of the cylindrical joint member 40 when inserted into the through hole of the cylindrical joint member 40.
To 53 are compressed. In addition, the cylindrical joint member 4
When the means for arranging the band-shaped conductive member 54 is provided on the outer periphery of the cylindrical joint member 40, the cylindrical joint member 40 is connected to the reinforcing insulator 31 with the two cable conductors connected via the cylindrical joint member. When positioned inside, a conductive state is set between the band-shaped conductive member 54 disposed between the high-voltage shield electrode 30 and the outer peripheral portion of the cylindrical joint member 40. And, by providing the means for setting the conduction state via the band-shaped conductive member, in the cable connecting portion of the present invention, the configuration of the member for connecting the conductor connector and the cylindrical joint member can be simplified. At the same time, when connecting the cable, the connection operation can be performed only by inserting the conductor connector into the through hole of the cylindrical joint member.

Further, when a band-shaped conductive member is arranged on the outer peripheral portion of the cylindrical joint member 40, conduction with the high-voltage shield electrode 30 is achieved only by inserting the cylindrical joint member into the reinforcing insulator 31. You can set the state,
As in the case of the conventional device, there is no need to provide a conducting means having a complicated configuration. In the embodiment of the present invention, it is possible to provide a means for arranging the band-shaped conductive member only on the inner peripheral surface of the cylindrical joint member. In this case, the outer periphery of the cylindrical joint member may be provided. It is also possible to provide the same conducting means as in the case of the conventional cable connection between the unit and the high-voltage shield electrode.

In order to attach the band-shaped conductive member to the cylindrical joint member 40 shown in FIG. 3, FIGS.
And a band-shaped conductive member supporting means having the structure shown in FIG. As shown in FIG. 4, four ring-shaped inner peripheral grooves 43 are formed on the inner peripheral surface of the cylindrical joint member 40.
43a are provided, and for each inner circumferential groove,
The band-shaped conductive members 50 to 53 are attached.
As shown in FIGS. 5 and 6, the inner peripheral groove for attaching the band-shaped conductive member is configured to be cut from the inner peripheral surface to mount the band-shaped conductive member on the inner peripheral groove. Further, the inner peripheral groove is formed in a state where the end portion as shown in FIG. 6 is cut at an acute angle. The inner peripheral groove 4
3 has a notch 46 in which a projection is partially cut out.
Are arranged so that the work of attaching the band-shaped conductive member to the inner circumferential groove of the inner circumferential surface of the cylindrical joint member can be easily performed.

In order to attach the band-shaped conductive member to the inner circumferential groove of the cylindrical joint member, the band-shaped conductive member 50 is disengaged by forming an inner circumferential groove having a shape as shown in FIG. Will not be able to. In the example shown in FIG. 7, in the inner peripheral groove 43 provided on the inner surface of the cylindrical joint member, the groove corners 44, 44a on both sides of the groove are provided.
Are cut at an angle θ, and the projections 4 are formed on both sides of the groove.
5, 45a is configured to be covered. The inner peripheral groove 4
3, the band-shaped conductive member 50 is attached to the side plate member 5.
A large number of cut-and-raised pieces 57 are arranged at predetermined intervals between 5 and 56, and the cut-and-raised pieces 57 are provided so as to project obliquely from the inner peripheral surface of the cylindrical joint member. When the band-shaped conductive member is attached to the inner circumferential groove, the side plate member is retracted inward from the corner of the groove. Then, when the conductor connector is inserted into the through hole of the cylindrical joint member, the cut-and-raised piece of the band-shaped conductive member is pressed between the conductor connector and the cylindrical joint member, and the cut-and-raised piece is in a predetermined shape. The two members are pressed with the pressure described above, so that a conduction state between the two members can be set.

In the present invention, as the band-shaped conductive member, for example, "Multi Contact Band" (trade name) manufactured by Salton Co., Ltd. can be used. The multi-contact band is configured such that a thin belt-shaped plate member made of a copper alloy is cut and raised at a central portion to form pieces at predetermined intervals. Then, the cut-and-raised pieces are tilted to one side while being compressed by the pressing members on both sides, and are pressed against the members on both sides by the elasticity of the band, so that electrical conduction can be obtained. . In addition, the width of the multi-contact band and the interval between the cut and raised pieces can be set arbitrarily. In this case, the current carrying capacity of one cut and raised piece can be set to 10 to 30A. Therefore, for example, even when a current of several hundred to several thousand A flows in a high-voltage transmission line, it is possible to sufficiently cope with the width of the multi-contact band and the number of cut-and-raised pieces. Become.

As the band-shaped conductive member disposed on the cylindrical joint member of the present invention, one having various current carrying capacities sold as the multi-contact band can be appropriately selected and used. In addition, other members having similar conduction characteristics can be used. For example,
The band-shaped conductive member shown in FIG. 7 is cut in half in the width direction, and a large number of cut-and-raised pieces are formed at a predetermined angle on a side portion of the side plate member, or a band-shaped thin plate member. A circular or square cut-and-raised piece was protruded by pressing or the like at a predetermined interval from both sides, and a portion of the cut-and-raised piece was provided to protrude from both surfaces of the thin plate in a state of being connected to the band body. It is possible to set the energization state of the cylindrical joint member satisfactorily even if a material or the like is used. Further, in the cylindrical joint member of the present invention, the shape of the groove member for mounting the band-shaped conductive member and the means for preventing the band-shaped conductive member from coming off can be arbitrarily configured.

[0027]

As described above, the power cable is connected only by inserting the conductor connector attached to the end of the cable conductor into the joint member from both sides, and the insertion side provided on the conductor connector. And the connector on the locking side is engaged to form a connection part with high mechanical strength. In addition, the conductor joint is formed in a cylindrical shape with a conductive metal member such as copper, and a conductive state is set via a band-shaped conductive member with respect to a conductor connector inserted into a through hole of the cylindrical joint member. Therefore, the configuration of the cylindrical joint member can be simplified.
In the cylindrical joint member of the present invention, the band-shaped conductive member is integrally arranged on the outer peripheral portion of the cylindrical joint member corresponding to the high-voltage shield electrode arranged at the central portion such as the connection portion. It is possible to set the conduction state only by inserting the joint member inside the high-voltage shield electrode,
The configuration for that can also be simplified. Furthermore, since the band-shaped conductive member used in the present invention uses a commercially available band-shaped conductive member, only the cylindrical joint member can be dealt with only by performing processing for holding the band-shaped conductive member, and the power consumption can be reduced. The structure of the cable connecting device can be simplified, and the working process for connecting the cable ends can be simplified.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a cable connecting portion of the present invention.

FIG. 2 is an explanatory diagram illustrating a configuration of a connection portion in a cable connection portion.

FIG. 3 is an explanatory view of a cylindrical joint member used in the present invention.

FIG. 4 is an explanatory view of a state in which a band-shaped conductive member is arranged on the inner peripheral surface of a cylindrical joint member.

FIG. 5 is a sectional view of a cylindrical joint member.

FIG. 6 is an explanatory view of a groove provided in a cylindrical joint member.

FIG. 7 is an explanatory view of a state in which a band-shaped conductive member is attached to an inner circumferential groove.

FIG. 8 is an explanatory diagram of a conventional cable connection unit.

FIG. 9 is an explanatory view of a state in which a conductor connector in a conventional cable connection portion is mounted.

FIG. 10 is an explanatory view of an example in which means for directly connecting conductor connectors is provided.

[Explanation of symbols]

1.1a.22.22a cable conductor, 2.2a.
23 ・ 23a conductor connector, 10 conductor joint, 2
0 cable connection part, 30 high voltage shield electrode,
40 cylindrical joint member, 43 inner circumferential groove, 48
Outer peripheral groove, 50-54 Band-shaped conductive member, 55
56 side plate members, 57 cut and raised pieces.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Akira Saito 1008 Niibori, Kumagaya-shi, Saitama Prefecture Mitsubishi Electric Cable Works Co., Ltd. Kumagaya Works (56) References JP-A-7-222341 (JP, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) H02G 15/08

Claims (1)

(57) [Claims] 1. A conductor connector is fixed to each of the distal ends of two cable conductors, one of an insertion head member projecting from the distal end of each of the conductor connectors has a locking-side connector, and the other has a locking-side connector. Insertion-side connectors are provided, and the conductor joint is positioned and provided with respect to a high-voltage shield electrode fixed and provided inside the reinforcing insulator. The conductor connector is inserted into the conductor joint to connect the conductor connector In the power cable connecting device for obtaining electrical continuity of the cable conductor to be connected, the conductor connectors are directly connected to each other by an engagement means provided at a distal end thereof, and the conductor joint is cylindrical. A band-shaped conductive member is attached to the inner peripheral surface and the outer peripheral surface of the conductor joint so as to protrude from the inner peripheral surface and the outer peripheral surface of the conductor joint, respectively. With shield electrode Is conducted by the band-shaped conductive member, and the band-shaped conductive member is compressed by inserting the conductor connector into a conductor joint, from one conductor connector to the other conductor connector through the conductor joint. A connection device for a power cable, which secures a conduction path.