JP2016103922A - Spacer for overhead wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spacer for an overhead wire which is used for keeping a clearance between wires of which the clearance is short, and can be easily fitted by indirect hot-line work without power failure.SOLUTION: A spacer 1 for an overhead wire comprises: a spacer body 2 which is provided to bridge two wires 100a and 100b provided in parallel and includes an opening 6 into which the wires can be inserted in a radial direction, in an intermediate part; hold parts 4 and 5 which are provided integrally in both ends of the spacer body 2 for holding the wires which are inserted via the opening 6; and closing members 11 and 12 for closing the opening 6. The spacer body 2 and the closing members 11 and 12 include held parts 2a, 11b and 12b which can be held by an indirect hot-line holding tool.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an overhead wire spacer used for securing a separation distance between a plurality of overhead wires arranged in parallel, such as a multi-conductor transmission line of a high voltage overhead wire.

  For example, in a multi-conductor power transmission line of a high voltage overhead wire, a spacer is attached between two wires to prevent noise caused by contact of the wires.

  In addition, even in three-phase overhead transmission lines and distribution lines, interphase spacers are used to ensure the distance between the phases in order to prevent the wires from vibrating greatly and causing the transmission lines of different phases to contact each other to cause a short circuit between the phases. I am trying to install.

  Among these, various configurations have been proposed as the interphase spacer. For example, a clamp that holds one overhead power transmission line, a length adjustment fitting that adjusts the overall length of the interphase spacer, and a predetermined gap between the overhead power transmission lines. What comprised the insulator part which hold | maintains an insulation distance, and the clamp which hold | grips the other overhead power transmission line (refer patent document 1), a pair of holding part which hold | maintains each installation power distribution line, and a holding part A connecting portion having a predetermined length for connecting and supporting each of the gripping portions, a pair of arm portions including a holding portion that forms a holding hole capable of holding each erected transmission and distribution line, and each arm portion A holding surface that has a support shaft that rotatably supports one end and a locking portion that supports the other end of each arm portion so as to be locked to each other, and each of the holding portions holds each erected transmission / reception line (Patent Document 2) configured with a pair of clamping members having a width of each transmission line And a power transmission line holder that reciprocates on the base, and the power transmission line holder includes a locking fixing portion and a power transmission wire clamping portion, and a locking fixing portion. To realize reciprocal movement of the power transmission line holder on the base body, so that the power transmission line holder is fixed at the power transmission line holding position, and the power transmission line is held by the power transmission line holding portion at the power transmission line holding position. What was made (patent document 3) etc. is well-known.

JP 2012-019635 A JP 2007-166859 A JP 2010-246337 A

  However, these interphase spacers are useful for securing a large interphase distance, but they are difficult to use in a multiconductor transmission line with a relatively short separation distance. In order to fix each other, as shown in FIG. 5, a winding type in which a spacer 101 arranged so as to pass between the electric wires 100a and 100b arranged side by side is wound around and fixed to the electric wires 100a and 100b by a bind wire 102 or the like. The spacer for multiple conductors was used.

However, such a winding type multi-conductor spacer is difficult to install with an indirect hot wire tool and must rely directly on the hot wire. Is required. In particular, the multiconductor transmission line is often installed in a place with a large transmission capacity in the vicinity of the substation, so that it is difficult to cause a power failure in the high-voltage distribution line.
For this reason, development of the overhead wire spacer which can be attached by indirect hot wire work without causing a power failure has been desired.

  The present invention has been made in view of such circumstances, and is a spacer for securing a separation distance between electric wires having a short separation distance, such as a multi-conductor transmission line, for indirect hot line work without causing a power failure. The main object is to provide an overhead electric wire spacer that can be easily attached.

  In order to achieve the above object, an overhead electric wire spacer according to the present invention is provided so as to pass two electric wires arranged side by side, and an opening that allows each electric wire to be inserted from the radial direction is provided in the middle. A spacer main body provided in a portion, a pair of holding portions that are integrally provided at both ends of the spacer main body and hold the electric wire inserted through the opening, and a closing member that closes the opening. And a gripped portion that can be gripped by an indirect live wire gripping tool is provided on the spacer body and the closing member.

  Therefore, grip the part to be gripped on the spacer body with an indirect hot wire gripping tool and approach the two wires that you want to install the spacer on, and insert one of the wires through the opening and hold it on one holding part. Then, the other end of the electric wire is inserted through the opening and held by the other holding portion, and then the closing member is held by the holding portion of the indirect hot wire holding tool and moved. And the opening may be closed.

  Here, the closing member is composed of first and second closing members that separately close the opening of the spacer body, and the first closing member is provided at one end of the spacer body. A holding state of an electric wire held in a holding portion provided at one end of the spacer body, and the second closing member, Holding of an electric wire that is rotatably provided at the end of the opening adjacent to the holding portion provided at the other end of the spacer body and is held at the holding portion provided at the other end of the spacer body The state may be fixed.

  With such a configuration, the first closing member and the second closing member can close the opening while fixing the holding state of the wire to the holding portion one by one. The spacer can be securely attached.

Further, in order to further strengthen the holding state of the electric wire in the holding portion, a tightening band is provided around the spacer body to tighten the spacer body from the periphery (suppressing the spread to the outside of the spacer body). May be. With such a configuration, when the slackness of the two electric wires is unbalanced, the weight of the electric wires is applied to the spacer main body. Therefore, a tightening band is provided around the spacer main body to ensure the strength of the spacer main body. In addition, the holding force for holding the electric wire can be increased.
In addition, in each holding | maintenance part, even if a protrusion etc. are formed in an inner surface so that it may bite into the electric wire inserted here, you may make it install the member which bites into an electric wire in an inner surface.

Further, a protrusion that temporarily supports the closed state of the first closing member is formed on the inner peripheral surface of the spacer body, and an engaging convex portion is provided on the second closing member, and the spacer body In addition, when the second closing member is rotated to the closing position of the opening, an engagement hole that engages with the engagement convex portion may be provided.
With this configuration, even when the opening is directed downward, the first closing member and the second closing member can be fixed at the closing position of the opening. It becomes easy, and it becomes possible to avoid the inconvenience that the attached state comes off.

  As described above, according to the overhead wire spacer according to the present invention, each of the wires can be inserted from the radial direction into the spacer body provided to pass two wires arranged in parallel. In the middle part, and a pair of holding parts for holding the electric wires inserted through the openings at both ends of the spacer body, and a closing member for closing the opening, and indirectly between the spacer body and the closing member Since the gripped part that can be gripped by the live gripping tool is provided, the spacer body can be attached to the electric wire by gripping and operating the gripped part with the indirectly active gripping tool. It is possible to close the main body opening with a closing member to fix the mounting state of the spacer body by indirect hot wire work. It is possible to easily attach.

FIG. 1 is a view showing an overhead electric wire spacer according to the present invention, in which (a) is a side view thereof, (b) is a front view thereof, and (c) is a rear view thereof. 2A and 2B are views showing a state in which the closing member of the overhead wire spacer according to the present invention shown in FIG. 1 is opened, FIG. 2A is a side view thereof, and FIG. 2B is a front view thereof. FIG. 3A is a perspective view showing an engaging convex portion provided on the closing member of the overhead wire spacer according to the present invention, and FIG. 3B is an engagement in which the engaging convex portion is inserted and locked. It is a figure which shows a hole. FIG. 4 is a diagram showing a procedure for attaching the overhead wire spacer according to the present invention to the wire, (a) is a diagram showing a state in which the overhead wire spacer is approached to the wires arranged in parallel, (b) is a diagram The figure which shows the state which inserted one electric wire (upper electric wire in a figure) from the opening part, and was made to hold | maintain at one holding part, (c) is the other electric wire (lower electric wire in the figure) from an opening part. The figure which shows the state inserted and hold | maintained at the other holding | maintenance part, (d) is a figure which shows the state which obstruct | occluded the upper half of the opening part with the 1st obstruction | occlusion member, (e) is the 2nd obstruction | occlusion member. It is a figure which shows the state which obstruct | occluded the remaining half (lower half) of an opening part. FIG. 5 is a view showing a conventional winding type multi-conductor spacer.

  Hereinafter, the overhead wire spacer according to the present invention will be described with reference to the drawings.

  1 and 2, the overhead wire spacer 1 includes a spacer body 2 that is formed of a resin such as synthetic rubber and has a C-shaped cross section provided to pass two overhead wires arranged in parallel. .

  That is, the spacer body 2 includes a connecting portion 3 that extends in a straight line, and a first holding portion that is formed so as to be folded back from both ends of the connecting portion and holds the side surface of the electric wire at one end. 4 is formed, and a second holding portion 5 that holds the side surface of the electric wire is formed at the other end portion.

  Each holding part 4, 5 is folded back so as to have an inner diameter that is equal to or slightly smaller than the outer diameter of the electric wire, and the distance between the folded tip parts 4 a, 5 a and the connecting part 3. Is formed somewhat smaller than the outer shape of the electric wire. Preferably, the holding portions 4 and 5 are provided with biting mechanisms 4b and 5b such as protrusions biting into the electric wires inserted therein. In this biting mechanism, a protrusion or the like may be integrally formed on the inner surface of the holding portion, or a member that causes the electric wire to bite may be installed on the inner surface of the holding portion.

  Accordingly, an opening 6 is formed in the intermediate portion of the spacer body 3 at a portion facing the connecting portion 3 by separating the tip portions 4a and 5a of the holding portions 4 and 5 from each other.

  Further, around the spacer body 2, tightening bands 7 for tightening the spacer body 2 from the periphery and tightening bands 7 for suppressing outward spreading are provided at two locations near both ends in the width direction (the axial direction of the electric wire). . The tightening band 7 is provided over the entire circumference of the spacer body 2 excluding the opening 6 and is formed by processing an elastically deformable band-shaped metal material. A force for contracting 5 (compressing radially inward) is always applied, and excessive extension of the connecting portion 3 is prevented.

  The opening 6 of the spacer main body 2 can be closed by first and second closing members 11 and 12 described below.

  The first closing member 11 is connected to the end portion of the opening 6 adjacent to one holding portion 4 provided at one end portion of the spacer body 2, that is, to the distal end portion 4 a of the first holding portion 4. Is formed integrally so as to be able to rotate, and the space applied to one holding part 4 from the upper side of the opening 6 in the figure is closed, and the electric wire held by the first holding part 4 is held. Is fixed.

  Further, the second opening / closing member 12 is provided at the end of the opening 6 adjacent to the other holding portion 5 provided at the other end of the spacer body 3, that is, at the tip 5 a of the second holding portion 5. It is integrally formed so as to be able to rotate via the connecting piece 12 a, closes the space from the lower side of the opening 6 in the figure to the other holding part 5, and is held by the second holding part 5. The holding state of the electric wire is fixed.

  A state in which the first closing member 11 is positioned at the closed position of the opening 6 and the side surface serving as the peripheral surface of the overhead wire spacer 1 and the second opening / closing member 12 are positioned at the closed position of the opening 6 In FIG. 2, gripped portions 11b and 12b that can be gripped by an indirect live wire gripping tool project from the side surface that is the peripheral surface of the overhead wire spacer 1, and the peripheral surface of the spacer body 2 (in this example, the second surface Further, a gripped portion 2a that can be gripped with an indirect live-line gripping tool is also provided on the outer peripheral surface of the holding portion 5).

  Furthermore, when the first closing member 11 is positioned at the closed position on the inner surface of the connecting portion 3, the corner portion of the insertion end of the first closing member 11 is locked and temporarily fixed at the closed position. The protrusion 2b for this is formed. Further, when the second closing member 12 is positioned at the closed position, an engaging protrusion 13 is formed on a side surface facing the connecting portion 3, and the connecting portion 3 facing the engaging protrusion 13 is formed at the site of the connecting portion 3. An engagement hole 14 into which the engagement protrusion 13 is inserted and locked is formed.

  Two engagement protrusions 13 are provided in the width direction of the second closing member 12, and two engagement holes 14 are also provided in the width direction of the connecting portion in accordance therewith. In this example, the engagement protrusion 13 is formed by integrating a conical head portion 13a and a base pillar portion 13b that supports the head portion as shown in FIG. 14 is a through-hole 14a formed to have a diameter smaller than the maximum diameter of the head of the engaging protrusion 13, and a plurality of (this is formed radially on the periphery so that the periphery of the through-hole is easily elastically deformed. In the example, it is constituted by 4) notches 14b. Therefore, when the head portion 13a of the engaging protrusion 13 is inserted into the through hole 14a of the engaging hole 14 and pushed in, the peripheral edge of the through hole 14a is elastically deformed by the head portion 13a, and the head portion 13a is inserted. Is completely inserted, the peripheral edge of the engagement hole 14 (periphery of the through hole 14a) is locked to the bottom surface of the head 13a to prevent the engagement protrusion 13 from coming off.

  In the above configuration, for example, in order to attach the overhead wire spacer 1 to two electric wires arranged vertically, the first and second closing members are rotated as shown in FIG. In this state, the opening is fully opened, and the gripped portion of the spacer body is gripped and lifted with an indirect live wire gripping tool, and the two wires to be attached are approached from below. .

  Then, as shown in FIG. 4B, the upper electric wire 100a (first electric wire) is inserted from the opening and is held by the upper holding portion (first holding portion 4). At this time, when the electric wire is inserted from the opening and is positioned in front of the first holding part, the portion that moves from the opening of the first holding part is formed somewhat narrower than the electric wire diameter. When the spacer main body is pressed against the electric wire 100 a so as to pull downward, the first holding portion 4 and the fastening band 7 are somewhat elastically deformed and expanded, and the electric wire is guided to the first holding portion 4. The electric wire guided to the first holding portion 4 is held by the first holding portion 4 by the elastic force of the spacer body 2 and the elastic force of the fastening band 7, and the biting mechanism 4 b is formed on the inner surface of the holding portion 4. If provided, the biting mechanism 4b bites into the surface of the electric wire, so that the spacer body 3 does not move in the axial direction of the electric wire (state shown in FIG. 4C).

  Thereafter, while pulling the spacer body 3, the lower electric wire 100 b (second electric wire) is inserted from the opening and is held by the lower holding portion (second holding portion 5). Also in this case, when the electric wire is inserted from the opening 6 and is positioned in front of the second holding portion 5, the portion of the second holding portion 5 that moves from the opening 6 is formed to be somewhat narrower than the wire diameter. Therefore, when the spacer body 2 is pushed upward to push the electric wire 100b, the second holding part 5 and the fastening band 7 are elastically deformed to some extent, and the electric wire 100b is guided to the second holding part 5. It is burned. The electric wire 100b guided to the second holding portion 5 is held by the second holding portion 5 by the elastic force of the spacer body 2 and the elastic force of the fastening band 7, and the biting mechanism 5b is formed on the inner surface of the holding portion. If it is provided, the biting mechanism 5b bites into the surface of the electric wire.

  As described above, after the two electric wires are held by the corresponding holding portions, the first closing member 11 is rotated using the indirectly active gripping tool, and the gripped portion 11b is gripped by the joint live wire gripping tool. Then, it is pushed inward from the opening 6 to close the upper half of the opening 6 and to support and fix the holding state of the electric wire held by the first holding part 4 from below.

  At this time, since the corner portion of the insertion end of the first closing member 11 is locked by the provisional protrusion 2b, the first closing member 11 can be operated even if the indirect active gripping tool is separated from the first closing member 11. The state closed by the closing member 11 is not released.

  Thereafter, the second closing member 12 is rotated using an indirect active gripping tool, the gripped portion 12b is gripped with the joint active line gripping tool and pushed inward from the opening 6, and the remaining portion of the opening 6 is moved. The electric wire held in the second holding part 5 is closed and supported and fixed from above.

At this time, the first closing member 11 is acted upon by a force that is pushed up from below by the second closing member 12, so that the holding state of the first holding portion 4 is more firmly fixed, and the second The engagement protrusion 13 of the closing member 12 is engaged with the engagement hole 14 and the second closing member 12 is prevented from being detached from the spacer body 2, and the holding state of the second holding portion 5 is firmly fixed. It becomes a state.
Therefore, the overhead wire spacer 1 can be easily installed on the two wires 100a and 100b by indirect hot wire work using an indirectly active tool without causing a power failure of the track.

  In the above-described example, an example of attachment in which two wires are arranged on the upper and lower sides is shown. However, in the case of two wires arranged in parallel in the horizontal direction, for example, from the bucket of an aerial work vehicle By approaching in the horizontal direction, it can be mounted in the same way.

DESCRIPTION OF SYMBOLS 1 Spacer spacer 2 Spacer main body 2a, 11b, 12b Grasping part 2b Projection 4,5 Holding part 6 Opening part 7 Tightening band 11 1st closure member 12 2nd closure member 13 Engagement protrusion 14 Engagement hole 100a, 100b electric wire

Claims (4)

A spacer body provided to pass two electric wires arranged side by side, and provided with an opening in the middle portion that allows each of the electric wires to be inserted from the radial direction;
A pair of holding portions that are integrally provided at both ends of the spacer body and hold the electric wire inserted through the opening;
A closing member that closes the opening,
An overhead electric wire spacer, wherein the spacer main body and the closing member are provided with gripped portions that can be gripped by an indirect hot wire gripping tool.   The closing member includes first and second closing members that separately close the opening of the spacer body, and the first closing member is close to a holding portion provided at one end of the spacer body. The second closing member is provided at the end of the opening so as to be rotatable, and the holding state of the electric wire held at the holding portion provided at one end of the spacer body can be fixed. The holding state of the electric wire held at the holding portion provided at the other end portion of the spacer body and rotatably provided at the end portion of the opening portion adjacent to the holding portion provided at the other end portion of the main body. The overhead wire spacer according to claim 1, wherein the spacer is capable of being fixed.   The overhead wire spacer according to claim 1 or 2, wherein a tightening band for tightening the spacer body from the periphery is provided around the spacer body.   On the inner peripheral surface of the spacer body, a ridge that temporarily supports the closed state of the first closing member is formed, and an engaging convex portion is provided on the second closing member. 4. An engagement hole that engages with the engagement protrusion when the second closing member is rotated to the closing position of the opening is provided. The overhead wire spacer according to any one of the above.

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