JP2013150370A - Armoring wire connection fitting of cable and armoring wire connection method using the same and connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply a tension to an armoring wire of a connection after protecting the connection of a cable body against damage due to high heat during welding, while reducing the labor and time required for connection of the armoring wire.SOLUTION: The armoring wire 13 of one cable is inserted into the groove 5 of a first cylindrical member 1 and each armoring wire 13 is fixed thereto by welding. The armoring wire 14 of the other cable is inserted into the groove 5 of a second cylindrical member 2 and each armoring wire 14 is fixed thereto by welding. An annular protrusion 8 of the first cylindrical member 1 is fitted in the annular recess 9 of the second cylindrical member 2, and the flanges 6, 6 of both cylindrical members are fastened by fastening members 3, 4 in the direction bringing them close to each other, thus coupling both cylindrical members 1, 2 and applying a tension to the armoring wires 13, 14 of both cables.

Description

  The present invention relates to an exterior iron wire connection fitting used for a connection portion of a cable having an iron wire sheath such as a submarine cable, and a method and a connection portion of the exterior iron wire using the same.

  Conventionally, as a method of connecting the armored wire of the cable, sleeves with screw holes on both ends are prepared for the number of armored wires, and the end of each iron wire is threaded, and then the threaded holes of each sleeve are formed. A method is known in which an end portion of an iron wire is screwed and each iron wire and a sleeve are welded (see Patent Document 1).

  In addition, after preparing a cylindrical coupler having a large number of grooves or holes for inserting a large number of exterior iron wires one by one at both ends, the cylindrical coupler is disposed on the outer periphery of the connection portion of the cable body, There has also been proposed a method in which an end portion of an iron wire is inserted into each groove or hole of a cylindrical connector and each iron wire is welded to a cylindrical connector (see Patent Document 2).

Japanese Patent Publication No.56-1005 JP 2010-178613 A

  However, in the connection method disclosed in Patent Document 1, threading is applied to each iron wire, each sleeve is rotated, and the iron wire and the sleeve are screwed to apply tension to each iron wire. Since it is necessary to weld the iron wire and the sleeve, a great amount of labor and time are required. Also, in order to prevent loosening of the iron wire, it is necessary to perform welding while the iron wire is in contact with the connection portion of the cable body. Therefore, high heat during welding is transmitted to the connection portion of the cable body, and There is a risk that the insulating material is damaged and the insulating performance is deteriorated.

  Compared with this, the connection method disclosed in Patent Document 2 does not require threading for each iron wire, and the welded portion is separated from the connection portion of the cable body, so there is no possibility that high heat is transmitted to the connection portion of the cable body. In this respect, an improvement is seen over the method disclosed in Patent Document 1. However, since the method disclosed in Patent Document 2 cannot apply tension to the iron wire when the iron wire is welded to the cylindrical connector, the iron wire is likely to be loosened. In particular, if the iron wire around the connection part of the cable body is loose, when the tension is applied to the iron wire exterior cable, the tension corresponding to the loosening of the iron wire will be applied to the connection part of the cable body. There is a risk of pulling out the cable conductor or disconnecting the cable conductor.

  The object of the present invention is that less labor and time are required for connecting the external iron wire, there is no risk of damage to the connection portion of the cable body due to high heat during welding, and tension can be applied to the external iron wire of the connection portion. An object of the present invention is to provide an exterior iron wire connection fitting for a cable, an exterior iron wire connection method using the same, and a connection portion.

In order to achieve the above-mentioned object,
A first cylindrical member that fixes the end of the outer iron wire of one cable, a second cylindrical member that fixes the end of the outer iron wire of the other cable, and the first and second cylindrical members A tightening member connected in the axial direction,
Each of the first and second tubular members has a groove or a hole into which an end portion of the exterior iron wire is inserted on the outer end side, a flange portion is formed on the inner end side, and one of An annular convex portion is formed on the inner end surface of the cylindrical member, and an annular concave portion that is fitted to the annular convex portion is formed on the inner end surface of the other cylindrical member,
The tightening member is characterized in that both cylindrical members are coupled by tightening flange portions of both cylindrical members, to which end portions of the exterior iron wires are fixed, in a direction in which they are brought close to each other.

Moreover, the connection method of the exterior iron wire which concerns on this invention using said connection metal fittings,
Insert the outer iron wire of one cable into the groove or hole of the first cylindrical member, and fix each outer iron wire to the first cylindrical member by welding,
Insert the outer iron wire of the other cable into the groove or hole of the second cylindrical member, and fix each outer iron wire to the second cylindrical member by welding,
By fitting the annular convex part of one cylindrical member into the annular concave part of the other cylindrical member and tightening the flange parts of both cylindrical members closer to each other with the fastening member, the two cylindrical members are connected. At the same time, tension is applied to the external iron wires of both cables.

Moreover, the connection part of the exterior iron wire which concerns on this invention using said connection metal fittings,
The outer iron wire of one cable is inserted into the groove or hole of the first cylindrical member, and each outer iron wire is fixed to the first cylindrical member by welding,
The outer iron wire of the other cable is inserted into the groove or hole of the second cylindrical member, and each outer iron wire is fixed to the second cylindrical member by welding,
In the state where the annular convex portion of one cylindrical member is fitted into the annular concave portion of the other cylindrical member, the flange portions of both cylindrical members are tightened by the fastening members, and both the cylindrical members are connected. This is characterized in that tension is applied to the outer iron wire.

  According to the present invention, the first cylindrical member and the second cylindrical member are used, the work of fixing the outer iron wire of one cable to the first cylindrical member, and the other to the second cylindrical member Since the operation of fixing the armored iron wire of the cable can be performed individually without applying tension to the armored iron wire, the operation of fixing the armored iron wire to the cylindrical member can be performed easily and efficiently. Further, since welding when fixing the armored iron wire to the cylindrical member can be performed at a position away from the connection portion of the cable body, there is no possibility that the connection portion of the cable body is damaged due to high heat during welding.

  Moreover, since both cylindrical members are connected by tightening the flange portions of both cylindrical members to which the exterior iron wires are fixed with a tightening member in a direction in which they approach each other, tension can be applied to the exterior iron wires of both cables. Can be connected without loosening.

BRIEF DESCRIPTION OF THE DRAWINGS (A) is a partially cutaway side view and (B) is a BB line arrow view of (A) shown in the state which decomposed | disassembled one Example of the exterior iron wire connection metal fitting which concerns on this invention. The partial cutaway side view which shows the method of connecting an exterior iron wire using the connection metal fitting of FIG. The partial cutaway side view which shows the connection part of the armored iron wire using the connection metal fitting of FIG.

  FIG. 1 shows an embodiment of an exterior iron wire fitting according to the present invention. The armored wire connecting fitting includes a first tubular member 1 to which an end of the armored iron wire of one cable is fixed, and a second tubular member 2 to which an end of the armored iron wire of the other cable is fixed. The first and second cylindrical members 1 and 2 are constituted by a bolt 3 and a nut 4 (tightening member) for connecting the first and second cylindrical members 1 and 2 in the axial direction. The inner diameters of the first and second cylindrical members 1 and 2 are set to be slightly larger than the outer diameter of the connecting portion (described later) of the cable body.

  Each of the first and second cylindrical members 1 and 2 has a groove 5 into which the end of the outer iron wire is inserted on the outer end side (the side that becomes the outer end when connecting both cylindrical members). It is formed by the number of iron wires, and a flange portion 6 is integrally formed on the inner end side (side that becomes the inner end when connecting both cylindrical members). The groove 5 is opened in the outer peripheral surface of the cylindrical members 1 and 2, but the opening width is set narrower than the diameter of the exterior iron wire. This is to prevent the exterior iron wire inserted into the groove 5 from jumping out of the opening. A plurality of bolt holes 7 are formed in the flange portion 6 at equal intervals in the circumferential direction. Bolts 3 and nuts 4 are prepared by the number of bolt holes 7.

  Further, an annular convex portion 8 is fitted on the inner end surface of one cylindrical member (first cylindrical member in this embodiment) 1, and the annular convex portion 8 is fitted on the inner end surface of the other cylindrical member 2. An annular recess 9 is formed. The outer peripheral surface of the annular convex portion 8 is formed in a tapered shape having a tapered front end, and the base end is formed with a constant outer diameter. The inner peripheral surface of the annular concave portion 9 is formed in a shape in which the outer peripheral surface of the annular convex portion 8 is fitted. The tip side tapered portion of the annular convex portion 8 is a portion that facilitates insertion into the annular concave portion 9, and the constant outer diameter portion of the annular convex portion 8 and the constant inner diameter portion of the annular concave portion 9 are the first and second cylinders. It is a part which makes the center axis line of both cylindrical members correspond when connecting the cylindrical members 1 and 2. FIG.

  FIG. 2 shows a method of connecting the armor wire of the cable using the connection fitting of FIG. In the figure, 11 is a cable main body of one iron wire sheathed cable, 12 is a cable main body of the other iron wire sheathed cable, 13 is an armored iron wire twisted on one cable main body 11, and 14 is twisted on the other cable main body 12. A combined outer iron wire 15 is a connecting portion of the cable bodies 11 and 12. The first and second cylindrical members 1 and 2 are positioned on the outer periphery of each cable before connecting the cable main bodies 11 and 12, and moved to the connection portion 15 after the cable main body is connected. 15 are arranged on the outer periphery.

  The ends of the armored iron wire 13 on one cable body 11 are cut and aligned at predetermined positions, inserted into the grooves 5 of the first tubular member 1 one by one, and the first ends at the openings of the grooves 5. Are fixed to the cylindrical member 1 by welding (the welded portion is not shown, and the same applies hereinafter). Similarly, the end portions of the external iron wires 14 on the other cable body 12 are also cut and aligned at predetermined positions, inserted into the grooves 5 of the second tubular member 2 one by one, and at the openings of the grooves 5. It is fixed to the second cylindrical member 2 by welding. The positions at which the ends of the armored iron wires 13 and 14 are trimmed are such that the end portions of the armored iron wires 13 and 14 are fixed to the first and second tubular members 1 and 2 and the flange portions 6 and 6 of both tubular members. An appropriate interval D is set between them. In this state, no tension is applied to the external iron wires 13 and 14.

  Since the first and second cylindrical members 1 and 2 are separate members, the fixing work of the exterior iron wires 13 and 14 to the respective cylindrical members 1 and 2 is performed individually without applying tension to the exterior iron wires. Work is easy. Moreover, since the cylindrical members 1 and 2 and the exterior iron wires 13 and 14 can be welded at a position away from the connection portion 15 of the cable body, there is no possibility that the connection portion 15 is damaged due to high heat during welding.

  After that, the first and second cylindrical members 1 and 2 are rotated in the direction in which the outer iron wires 13 and 14 are tightened (reverse direction), and the bolt holes 7 and 7 of both flange portions 6 and 6 are matched. By the way, the bolt 3 is inserted into the bolt holes 7 and 7 and tightened with the nut 4. By this tightening, the first and second cylindrical members 1 and 2 move in a direction in which the flange portions 6 and 6 approach each other, and tension is gradually applied to the armored iron wires 13 and 14. In this process, the annular convex portion 8 is fitted into the annular concave portion 9, and the central axes of the first and second cylindrical members 1 and 2 coincide.

  When the bolts and nuts 3 and 4 are tightened to the end, an exterior iron wire connecting portion as shown in FIG. 3 is obtained. In this exterior iron wire connecting portion, the exterior iron wire 13 inserted into the groove 5 of the first tubular member 1 is fixed to the first tubular member 1 by welding and inserted into the groove 5 of the second tubular member 2. The flanged portions 6 and 6 of the two cylindrical members 1 and 2 are in a state where the outer sheathed wire 14 is fixed to the second cylindrical member 2 by welding and the annular convex portion 8 is fitted in the annular concave portion 9. The bolts and nuts 3 and 4 are connected to each other, and tension is applied to the external iron wires 13 and 14 of both cables. Therefore, the armored iron wires 13 and 14 in the vicinity of the cable main body connecting portion 15 are not loosened, and even when a tension is applied to the iron wire outer cable, the armored iron wire takes over most of the tension. There is no risk of damaging 15.

  Although FIG. 3 shows a state in which both flange portions 6 and 6 are in contact with each other, a gap may remain between both flange portions 6 and 6.

  Moreover, in the said Example, although the groove | channel 5 which inserts an exterior iron wire was formed in the 1st and 2nd cylindrical members 1 and 2, a hole (it does not open to the outer peripheral surface of a cylindrical member instead of the groove 5) ) May be formed. When forming a hole, welding of a cylindrical member and an exterior iron wire is performed at the entrance of a hole.

1: first tubular member 2: second tubular member 3: bolt 4: nut 5: groove 6: flange portion 7: bolt hole 8: annular convex portion 9: annular concave portion 11: one cable body 12: Other cable main bodies 13 and 14: exterior iron wire 15: connection part of cable main body

Claims (3)

A first cylindrical member that fixes the end of the outer iron wire of one cable, a second cylindrical member that fixes the end of the outer iron wire of the other cable, and the first and second cylindrical members A tightening member connected in the axial direction,
Each of the first and second tubular members has a groove or a hole into which an end portion of the exterior iron wire is inserted on the outer end side, a flange portion is formed on the inner end side, and one of An annular convex portion is formed on the inner end surface of the cylindrical member, and an annular concave portion that is fitted to the annular convex portion is formed on the inner end surface of the other cylindrical member,
The cable-clad iron wire connection fitting according to claim 1, wherein the fastening members are connected to each other by fastening the flange portions of both cylindrical members, to which the ends of the external iron wires are fixed, close to each other. A method for connecting an exterior iron wire using the connection fitting according to claim 1,
Insert the outer iron wire of one cable into the groove or hole of the first cylindrical member, and fix each outer iron wire to the first cylindrical member by welding,
Insert the outer iron wire of the other cable into the groove or hole of the second cylindrical member, and fix each outer iron wire to the second cylindrical member by welding,
By fitting the annular convex part of one cylindrical member into the annular concave part of the other cylindrical member and tightening the flange parts of both cylindrical members closer to each other with the fastening member, the two cylindrical members are connected. In addition, a method of connecting the armored iron wire, which applies tension to the armored iron wire of both cables. It is a connection part of the exterior iron wire using the connecting metal fitting according to claim 1,
The outer iron wire of one cable is inserted into the groove or hole of the first cylindrical member, and each outer iron wire is fixed to the first cylindrical member by welding,
The outer iron wire of the other cable is inserted into the groove or hole of the second cylindrical member, and each outer iron wire is fixed to the second cylindrical member by welding,
In the state where the annular convex portion of one cylindrical member is fitted into the annular concave portion of the other cylindrical member, the flange portions of both cylindrical members are tightened by the fastening members, and both the cylindrical members are connected. The exterior iron wire connecting portion, wherein tension is applied to the exterior iron wire.

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