JPH10336869A - Connecting device for power cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rotate a connection part where the conductor connector of two cables is connected via a conductor joint being provided in one piece with a reinforcing insulator in one piece for the force in a rotary direction being applied to the cables. SOLUTION: When two cable conductors are connected for forming a connection-fixing part, a recessed groove 70 is provided at the tip member of a conductor connector 21 of each cable, a projection member 60 is provided on the inner surface of the penetration hole of a conductor joint, and the projection part is engaged to the recessed part, thus rotating both members in one piece and preventing influence, for example, to the reinforcing insulator covering the connection part from being generating by the force in the rotary direction of the cable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming an intermediate connection portion of a crosslinked polyethylene insulated power cable (CV cable) using a block-molded reinforced insulator, and more particularly to a device in which a torsional force is applied to the cable. The present invention also relates to a device that enables the intermediate connection part to be rotated integrally when the connection is made.

[0002]

2. Description of the Related Art In a connection portion of a large-capacity power cable such as a CV cable having a large conductor cross-sectional area, it is integrally formed by using a rubber / plastic material as disclosed in Japanese Patent Application Laid-Open No. H8-17540. It is known that it is formed by using a block mold reinforcing insulator. In the conventional cable connecting means, a copper conductor connector is fixed to a distal end of a cable conductor, and a conductor connector attached to the distal ends of two cable conductors to be connected is connected to a copper conductor joint. The cable is inserted so as to face the cable so that the cable is conducted.

[0003] In the conventional example, each of two conductor connectors inserted into the conductor joint includes:
A locking means is provided between the conductor joint and a step formed inside the conductor joint and a step formed at the tip of the conductor connector with the conductor connector inserted into the conductor joint. And means for locking the conductor connector so that the conductor connector does not come off the conductor joint. As the conductor joint, a pleated polyhedral contact (louver) is provided on the inner surface of a cylindrical member made of copper or the like having good conductivity, and pressed and locked on the conductor connector by the louver or the like. Perform the action,
Those configured so that continuity between two cables can be obtained are also used.

[0004] A connection portion for a power cable as shown in the conventional example is configured, for example, as shown in FIG. 8, and a connection portion 10 for a cable includes two cables 1,
Conductor connectors 6 and 6a are integrally provided at the distal ends of the conductors 2 and 2a, respectively. Then, the conductor connectors 6 and 6a are inserted into the conductor joint 7 to constitute a means for setting a conductive state between the conductors via the conductor joint. In the cable connection section 10, a high-voltage shield electrode 11 is arranged at a position corresponding to the conductor joint 7, and a reinforcing insulator 12 as a block mold connection section is integrally formed in a cone shape with a predetermined length around the high-voltage shield electrode 11. Place the formed one.
The reinforcing insulator 12 is formed as a single piece using a rubber / plastic material such as an uncrosslinked polyethylene resin to which a crosslinking agent has been added.

In the cable connection section, a reinforcing insulator 1
2 and a semiconductive layer 13 is disposed around the outer periphery, a waterproof mixture is formed at a predetermined thickness on the outer periphery thereof, and a metal protection tube 15 is formed on the outer periphery of the insulator 14 made of the waterproof mixture. Deploy. Further, when forming an insulated connecting portion with respect to the protective tube 15, means for arranging the insulating tube 16 at a predetermined position and arranging a terminal seat 17 with respect to the protective tube 15 to connect to the ground. Provided. Further, the insulating tube 16
The waterproof layer 18 is arranged so as to cover both ends of the protective tube 15 and the connection portion with the cable sheath tube, and the waterproof layer 18 is configured by means of winding a waterproof tape or the like, so that moisture or the like enters the inside of the protective tube 15. This constitutes means for preventing such a situation.

[0008] In the case of forming the connecting portion as shown in FIG. 8, through the steps shown in FIGS. 9 to 12, FIG.
After forming a conducting portion of the cable via the reinforcing insulator 12 as shown in FIG. 3 and forming a connecting portion as shown in FIG. 13, each constituent member is arranged around the connecting portion, This constitutes the cable connection unit 10 shown in FIG. When connecting the cable, first, as shown in FIG. 9, bend or the like at the end of the cable to be connected is corrected, and then the cable sheath 5 is removed. Layer 4
Is peeled off, leaving only a predetermined length, so that the insulator 3 is exposed to a predetermined length on the tip side.

Next, as shown in FIG. 10, the insulator 3 is removed so that the cable conductor 2 protrudes, and the tip of the insulator 3 is formed by performing a pencil ring process. The operation of exposing the conductor is performed for each of the two cables facing each other. Thereafter, as shown in FIG. 11, the conductor connectors 6 and 6a are attached to the distal end of the conductor 2, respectively. Next, as shown in FIG. 12, the operation of inserting and fixing the two conductor connectors 6, 6a into the insertion holes 12a of the reinforcing insulator 12 is performed, and as shown in FIG.
A connection is formed in which the ends of the cables are fixed to each other in the reinforcing insulator 12. The reinforcing insulator 12 is made of an uncrosslinked polyethylene resin or the like to which a crosslinking agent has been added, and has a high-voltage shield electrode 11 provided at the center of the insertion hole 12a. 7 are provided, and the conductor connectors 6 and 6a of the two cable conductors 2 and 2a are connected via the conductor joint 7 while being positioned at the center of the high-voltage shield electrode 11.

As shown in FIG. 13, after the conductor connectors 6 and 6a of the two cable conductors 2 and 2a are connected inside the reinforcing insulator 12, a processing conductor is provided around the reinforcing insulator 12. And a process of applying heat and pressure from around the reinforcing insulator is performed. Then, by performing the above-described treatment, the uncrosslinked polyethylene resin to which the crosslinking agent for the reinforcing insulator is added is crosslinked, and the inner surface of the reinforcing insulator is brought into close contact with the surface of the cable insulator, and between the two members. No gaps or the like are formed. After performing the above-described processing, an operation of attaching a covering member around the connection portion is performed to form a cable connection portion as shown in FIG.

[0009]

In the cable connecting portion constructed as described above, the two cables can be fixed via the reinforcing insulator, so that a force in the torsional direction (rotation) is applied to one of the cables. ), The conductor connectors of the cable are not individually rotated with respect to the reinforcing insulator. However, assuming that a large external force such as an earthquake is applied and a rotational force is applied to the cable, tension may be applied to a contact portion between the cable insulator and the reinforcing insulator on the outer periphery thereof.

According to the present invention, the conductor connector and the conductor joint at the end of the cable can be connected to each other even if one of the cables rotates with respect to the reinforcing insulator in the above-described cable connecting portion. It is an object of the present invention to provide an apparatus which is integrally combined to transmit a rotational force of a cable to an entire connecting portion via a conductor joint so that only one cable does not rotate in the connecting portion.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a high-voltage shield electrode and a reinforcing insulator having a conductor joint are connected to the center of a through-hole formed in a longitudinal direction and integrally formed of a rubber / plastic material in advance. A connection fixing part is formed by attaching to the distal ends of the two cable conductors and inserting the connector from both sides of the through hole using a conductor connector provided at the distal end thereof and combining the connectors. Related to the device. The invention according to claim 1 of the present invention is characterized in that a conductor connector attached to each of the two cable distal ends and a conductor joint into which a distal member of the conductor connector is inserted have a convex portion on one member. The other member is provided with a concave portion, and by inserting and fixing the tip member of the conductor connector into the conductor joint, the concave and convex portions are connected to form a fixed portion.

Further, in the invention of claim 2, the above-mentioned 2
The outer peripheral portion of the distal end member of the conductor connector to be attached to each of the cable distal end portions and the inner peripheral portion of the conductor joint into which the distal end member of the conductor connector is inserted. Is characterized by providing a concave portion. In the invention according to claim 3, a base corresponding to a tip member of a conductor connector attached to each of the two cable tip portions, and a base corresponding to the conductor connector of a conductor joint into which the tip member of the conductor connector is inserted. One of the members is provided with a convex portion, and the other member is provided with a concave portion.

With the construction described above, in the present invention, by inserting the conductor connector provided at the tip of the cable conductor into the conductor joint, the locking means of both members is combined, and the cable connection portion is formed. They can be connected so as to rotate together. And even if a force that rotates the cable acts, the force acts as a rotational force on the entire connection portion through the conductor joint, so that only one of the cables is applied to the reinforcing insulator and its covering member. Rotation can be prevented. In addition, the combination mechanism of the concavities and convexities in the connection portion need only perform relatively simple processing on both the conventional conductor joint and the conductor connector, and does not affect the electrical and mechanical performance. Absent.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A power cable connecting device according to the present invention will be described with reference to the illustrated example. In the present invention, when forming the cable connecting portion, a connecting means as shown in FIG. 1 is used to fix the conductor connectors attached to the two cable conductor ends to each other, In the connection means, a fixing member as shown in FIG. 2 is used. In the embodiment of the present invention, the conductor connector 6 and the conductor joint 6 are denoted by reference numerals 21 and 50, respectively, with respect to the conventional example described below. Needless to say, the same operation as in the conventional example is performed. In the example shown in FIGS. 1 and 2, in the connection fixing portion 20 that combines the conductor connectors 21 and 21a, in order to connect the cable conductors 2 and 2a to each other, the distal end members 25 and 25a of the conductor connectors have The insertion-side connection tool 30 and the locking-side connection tool 40 as connection tools are respectively attached.

The conductor connector 21 is made of a metal such as copper or the like. The conductor fixing portion 22 is provided with a hole for inserting a conductor, and the conductor is inserted into the hole to perform a tightening action. Give and integrate. A small-diameter distal member 25 corresponding to a conductor joint is provided protrudingly at the distal end side of the conductor connector 21, and a concave hole 26 having a predetermined depth is provided from the distal end side of the distal end member 25. A screw portion 27 is formed on the inner surface of the hole. The conductor connector 21a is arranged symmetrically to the conductor connector 21, and the tip members 25, 25a of the two opposing conductor connectors 21, 21a.
The two conductor connectors are fixed so that the screw portions of the insertion-side connector and the locking-side connector as the connector are engaged with the screw portions 27 and 27a provided in the above, and the connection fixing portion 20 is formed. . A tip member 25 of a conductor connector to be inserted into a through hole of the conductor joint 50 when forming the connection fixing portion 20;
In order to establish continuity with the inner surface of the conductor joint 50, a ring-shaped groove 52 is provided on the inner surface of the through hole of the conductor joint, and a conductive band member (a multi-face contactor; 55, which are called “louvers”. The louver 55 is a thin belt-shaped member made of a copper alloy or the like,
A plurality of notched folds are provided at predetermined intervals, and the upper and lower surfaces of the notched folds are pressed against the outer peripheral surface of the tip member 25 and the inner peripheral surface of the through-hole of the conductor joint 50 to conduct electricity. .

The insertion-side connecting member 30 and the locking-side connecting member 40 as connecting members in the connection fixing portion 20 are configured as shown in FIG. 2, and are connected to the conductor connector 21 on the cable conductor 2 side. The insertion-side connecting tool 30 to be attached has a screw portion 31 provided on the outer peripheral portion of a cylindrical main body member. A head member 3 is provided on the tip end side of the main body member through a tapered portion 32.
3, the head member 33 is provided with a locking member 34 via a support shaft 35. The locking member 34 is provided with a plurality of predetermined members in the radial direction with respect to the axis of the main body. Arrange through intervals.

The locking-side connector 40 to be combined with the insertion-side connector 30 has a space portion 43 dug from the surface corresponding to the insertion-side connector on the inner surface of the main body provided with the screw portion 41 on the outer peripheral surface. Is provided. A projecting portion provided with a tapered surface 42 is provided at a portion of the space 43 on the entrance side, and the rear surface of the projecting portion is configured as a locking step portion 44. Then, when the insertion-side connecting tool 30 is attached to the above-described locking-side connecting tool 40 to form the connection fixing portion 20 as shown in FIG. The insertion-side connector and the locking-side connector are fixed in a state where the rear portion of the locking member 34 is expanded and the rear portion of the locking member 34 is locked by the locking step 44, so that the pulling force of the cable in the axial direction is reduced. Even when it works, the fixed state of the conductor connector at the connection fixing part can be maintained.

In the connection fixing portion as shown in FIG. 1, as described as a schematic diagram in FIG.
Is provided with a through hole 51 at a center portion thereof, and a concave groove 52 for mounting the louver is provided at a predetermined position of the through hole. Further, a tip member 25 for insertion into a through hole of a conductor joint is provided at a tip portion of the conductor connector 21, and a connection tool as shown in FIG. 2 is attached to the tip member 25. In the figure, the connection tool is omitted. Then, by attaching a conductor connector equipped with an insertion-side connector and a locking-side connector to both sides of the through-hole of the conductor joint 50 from both sides thereof, two conductor connectors of the conductor joint are formed inside the conductor joint. Connection can be made.

As shown in FIG. 3, when the distal end member of the conductor connector is formed in a cylindrical shape without irregularities, and when the irregularities are not formed on the surface of the through hole of the conductor joint, the joint surface of both members is formed. Are slidable with each other. When a rotational force acts on one cable, the conductor connector corresponding to the cable inevitably rotates with respect to both the other conductor connector and the conductor joint. . However, since the end of the cable to be inserted into the compression-molded reinforcing insulator is formed so as to be in close contact with the inner surface of the reinforcing insulator, a state where only one of the cables rotates. If it occurs, there is a possibility that tension is generated at a contact portion with the reinforcing insulator. On the other hand, in the embodiment of the present invention described below, two conductor connectors combined with the conductor joint are prevented from rotating with each other, so that the connection fixing portion can be formed as one rigid body as a whole. Examples of each case are shown.

[0020]

In the embodiment shown in FIG. 4, a concave groove 70 is provided in the distal end member 25 of the conductor connector 21 and a ridge member 60 is provided on the inner peripheral surface of the through hole 51 of the conductor joint 50. In this case, the conductor connector and the conductor joint are connected to each other as non-rotatable by combining the groove and the groove. In the conductor connector 21, the tip member 25
Are provided with grooves 70, 70a in the length direction in the periphery thereof, and the number, width and depth of the grooves are arbitrarily set.
Further, on the inner peripheral surface of the through hole 51 of the conductor joint 50, a concave groove 52 for mounting the louver as described above is provided in a circumferential direction, and a ridge corresponding to the concave groove of the tip member. The member 60 is provided in the length direction.

When the conductor connector is mounted on both sides of the conductor joint, the tip members of the two conductor connectors are connected inside the conductor joint by combining the ridge member and the concave groove, respectively. The cable is fixed via a cable and connected so as to be immovable in the length direction of the cable. Further, by combining the conductor joint, the ridge member provided on the tip member, and the concave groove, the two conductor connectors are integrated into a state in which they cannot rotate with each other. Therefore, even when a rotational force is applied from one cable to the connection fixing portion, the force is directly transmitted to the other cable, so that the connection fixing portion rotates integrally. It does not affect the mutual fixing state between the cable and the reinforcing insulator and between the conductor joint and the tip member.

The example shown in FIG. 5 shows a case in which a protruding member 71 is provided on the distal end member 25 of the conductor connector 21 and a concave groove 61 is cut into the inner surface of the through hole of the conductor joint 50. Also in this embodiment, since a gap is not formed when the ridge member and the concave groove are combined, the same fixing action as in the case of FIG. 4 can be exerted. In each of the examples shown in FIGS. 4 and 5, the louvers arranged in the groove 52 of the conductor joint are formed to have a length capable of covering between the ridge member or the groove of the tip member. It is possible to cope with the operation of inserting the tip member into the conductor joint.

In the example shown in FIGS. 6 and 7, projection members or recesses are provided at both ends of the conductor joint without providing a ridge member or the like on the inner surface of the conductor joint, and the ends of the conductor connector correspond thereto. The case where unevenness is formed is described. In the example shown in FIG.
Concave portions 62 and 62a are provided on both end surfaces 53 of the conductor joint 50,
Projecting members 72 and 72a are provided on the step portion 23 between the conductor fixing portion 22 and the distal end member 25 of the conductor connector 21 so as to protrude, respectively. Then, with the conductor connector attached to the conductor joint, the projecting members provided on each member are locked in the recesses, and the two conductor connectors are fixed to each other via the conductor joint so that they cannot rotate with each other. I do.

In the example shown in FIG. 7, concave portions 63 and 63a are provided on both end surfaces 53 of the conductor joint 50, and the conductor connector 21 is provided.
Projecting members 73 and 73a are provided on the step portion 23 between the conductor fixing portion 22 and the tip member 25 so as to protrude, respectively.
Then, with the conductor connector attached to the conductor joint, the projecting members provided on each member are locked in the recesses, and the two conductor connectors are fixed to each other via the conductor joint so that they cannot rotate with each other. I do. Therefore, in the examples shown in FIGS. 6 and 7, by engaging the projection member and the concave portion, even when a rotational force is applied to the connection fixing portion from one of the cables, the force is applied. Is transmitted directly to the other cable.Therefore, the cable connection part provided with the connection fixing part is in a state of rotating integrally, and the mutual fixing state of the cable and the reinforcing insulator, and the conductor joint and the tip member. Is not affected.

[0025]

According to the present invention, since the structure as described above is employed, the mechanism for combining the unevenness in the connecting portion is relatively simple processing for both the conventional conductor joint and the conductor connector. Can be easily configured. Then, by inserting the conductor connector provided at the distal end portion of the cable conductor into the conductor joint, the locking means of both members can be combined and connected so as to rotate integrally. In addition, even if a force that rotates the cable acts, the force acts as a rotational force on the entire connection portion via the conductor joint, so that only one of the cables is applied to the reinforcing insulator and its covering member. Rotation can be prevented.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of a connection fixing section of the present invention.

FIG. 2 is an explanatory view of a connector for fixing a conductor connector.

FIG. 3 is an explanatory diagram showing a configuration of a conductor connector and a conductor joint.

FIG. 4 is an explanatory view of a first embodiment showing a configuration of a conductor connector and a conductor joint of the present invention.

FIG. 5 is an explanatory view of a second embodiment showing the configuration of the conductor connector and the conductor joint of the present invention.

FIG. 6 is an explanatory view of a third embodiment showing a configuration of a conductor connector and a conductor joint of the present invention.

FIG. 7 is an explanatory view of a fourth embodiment showing the configuration of the conductor connector and the conductor joint of the present invention.

FIG. 8 is an explanatory diagram showing a configuration of a general cable connection portion.

FIG. 9 is an explanatory view of a state in which a jacket member at a cable tip is removed.

FIG. 10 is an explanatory view of a state where processing for exposing a conductor is performed.

FIG. 11 is an explanatory view showing a state where a conductor connector is attached to the tip of two conductors to be connected.

FIG. 12 is an explanatory diagram of a state where one of the cables is inserted into a reinforcing insulator.

FIG. 13 is an explanatory diagram of a state in which two cable conductors are connected via a reinforcing insulator.

[Explanation of symbols]

1 cable, 2 cable conductor, 6 conductor connector, 7 conductor joint, 10 cable connection,
12 reinforcing insulator, 15 protective tube, 16 insulating tube, 20 connection fixing part, 21 conductor connector,
25 tip member, 27 screw portion, 30 insertion side connection tool, 33 head member, 34 locking member,
40 locking side connection tool, 44 locking step, 50
Conductor joint, 51 Through hole, 52 Groove, 53
End face, 55 conductive band member (louver),
61/70 concave groove, 62 concave part, 63 projecting member, 60/71 projecting member, 72 projecting member,
73 recess.

Claims (3)

[Claims] 1. A reinforcing insulator having a high-voltage shield electrode and a conductor joint at the center of a through-hole formed in a longitudinal direction and integrally formed of a rubber / plastic material in advance, and a tip end of two cable conductors to be connected. And a connection connector formed at both ends of the through hole by using a conductor connector provided with a connection tool at a tip end thereof and combining the connection tool with each other to form a connection fixing portion. For a conductor connector to be attached to a tip portion and a conductor joint for inserting a tip member of the conductor connector, one member is provided with a convex portion and the other member is provided with a concave portion. A power cable connecting device, wherein a member is inserted into a conductor joint and fixed to form a fixed portion by combining and connecting the irregularities. 2. An outer peripheral portion of a distal end member of the conductor connector attached to each of the two cable distal end portions, and an inner peripheral portion of a conductor joint into which the distal end member of the conductor connector is inserted. The power cable connecting device according to claim 1, wherein the portion is provided with a concave portion on the other member. 3. A base corresponding to a distal end member of a conductor connector attached to each of the two cable distal ends, and a portion corresponding to a base of the conductor connector of a conductor joint into which the distal end member of the conductor connector is inserted. The power cable connection device according to claim 1, wherein one of the members has a convex portion and the other member has a concave portion.