JP2014100003A - PD clamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve easiness and safety of work relating to detachment of a rotary operation rod from a PD clamp or exchange of a high-voltage cutout.SOLUTION: A PD clamp device comprises: a pair of PD clamps 10 each including an opening 20c into which an edge line extending from a high-voltage cutout is inserted, and a needle electrode to be inserted to the edge line inserted into the opening 20c; a bypass line for electrically connecting the needle electrodes of the pair of PD clamps 10; and a substantially U-shaped protection member 14 disposed on at least one of both side faces, in the PD clamp 10, opposing in a direction along the edge line inserted into the opening 20c for covering the periphery of a portion in the edge line from the high-voltage cutout to the PD clamp 10. The PD clamp 10 includes a mounting part 30 to which the protection member 14 is mounted on both side faces in a freely removable manner.

Description

  The present invention relates to a PD clamp device used for connecting a power supply side edge line and a load side edge line of a high voltage cutout by a bypass line.

  The high voltage cutout is installed on the primary side of the transformer for the purpose of protecting the transformer from overload. When a power failure occurs due to the failure of the high-voltage cutout, the PD-side clamp device is used to bypass the power-side edge line and the load-side edge line of the high-voltage cutout. The PD clamp device has two PD clamps and a bypass line that connects the two PD clamps. The operator attaches PD clamps to the power supply side edge line and load side edge line of the high voltage cutout, respectively. Thus, a circuit that bypasses the high-voltage cutout is formed by a bypass line connecting the two PD clamps.

  Conventionally, as a PD clamp, there is a clamp device described in Patent Document 1. Patent Document 1 discloses an electric wire holding portion that holds a covered electric wire, a contact blade that is pressed against the covered electric wire held by the electric wire holding portion and is inserted into the covering, and contacts the core wire inside the covered electric wire, and the contact blade A screw-type drive member for pressing the wire against the covered electric wire, and a means for operating when the contact pressure with the core wire of the contact blade pressed against the covered electric wire by the screw-type drive member reaches a predetermined value and notifying it. Proposed clamping devices have been proposed.

  In the installation work of the PD clamp, the worker holds the rotation operation rod with the PD clamp inserted therein, inserts an edge line into the opening of the PD clamp, and operates the rotation operation rod to clamp the edge line. The needle electrode of the clamp is inserted into the edge line to conduct the conductive wire inside the edge line and the needle electrode. Then, after attaching the PD clamp, the worker performs work such as repair or replacement of the high-pressure cutout.

JP 2002-305817 A

  By the way, in attaching the PD clamp, the worker attaches the PD clamp to the load-side edge line of the high-voltage cutout, and then attaches the PD clamp to the power-side edge line of the high-voltage cutout. For this reason, after the PD clamp is attached to the load-side edge line of the high-voltage cutout, the rotary operation rod is removed from the PD clamp, and the rotation-operation rod is attached to the PD clamp attached to the power supply side edge line of the high-voltage cutout I do.

  Here, when the rotary operation rod is removed from the PD clamp, the rotation operation rod is rotated around its axis. Therefore, when the edge line from the high pressure cutout to the PD clamp is long, the edge line becomes the PD clamp. It may move so that it wraps around. For this reason, it becomes difficult to remove the rotating operation rod from the PD clamp.

  Therefore, in order to easily remove the rotary operation rod from the PD clamp, it is conceivable to attach the PD clamp to a portion close to the high-pressure cutout in the edge line. However, in this case, it becomes difficult to insert a drawing line cutter for cutting the edge line between the high-pressure cutout and the PD clamp, and the workability when replacing the high-pressure cutout may be reduced.

  In addition, the worker may not be able to determine the mounting position of the PD clamp and may repeat the operation of changing the mounting position of the PD clamp.

  In addition, after the PD clamp is attached, there is a possibility that the charged part may be exposed when the edge line is cut with the underline cutter.

  The present invention provides a PD clamp device that solves such problems and improves the ease and safety of work related to removal of a rotary operation rod from the PD clamp and replacement of a high-pressure cutout. For the purpose.

  In order to achieve the above object, the present invention has the following configuration.

  (1) A pair of PD clamps having an opening into which an edge line extending from the high-voltage cutout is inserted, and a needle electrode inserted into the edge line inserted into the opening, and the needle electrodes of the pair of PD clamps are electrically connected And at least one side face of the bypass line and opposite side faces facing in the direction along the edge line inserted in the opening of the PD clamp, from the high-pressure cutout at the edge line A protective member having a substantially U-shaped side view that covers the periphery of the region up to the PD clamp, and the PD clamp includes a mounting portion that detachably attaches the protective member to both side surfaces. Clamping device.

  According to (1), the protective member is mounted on the high-pressure cutout side of the PD clamp, the edge line is inserted into the opening and the protective member of the PD clamp, and the protective member is brought into contact with the high-pressure cutout. At this time, it is possible to arrange the PD clamp so that the length of the high-pressure cutout from the PD clamp becomes the optimum length for both the cutting operation of the edge line and the operation of removing the PD clamp from the operation rod. become. This makes it possible to easily determine the mounting position of the PD clamp. Furthermore, when the operating member is rotated to remove the PD clamp from the operating rod, the protective member restricts the PD clamp from rotating by bringing the protective member into contact with the high pressure cutout. Thereby, it is possible to smoothly remove the operation rod from the PD clamp. Further, when the edge line between the PD clamp and the high-pressure cutout is cut, the periphery of the cut surface of the edge line is surrounded by the protective member. This makes it possible to improve work safety.

  (2) In (1), the attachment portion is made of a magnet fixed to the PD clamp, and the protection member includes magnetic members that are attracted to the magnet on both sides of a substantially U-shape. PD clamp device.

  According to (2), the protective member can be easily attached by being attracted to the magnet fixed to the PD clamp.

  (3) In (1) and (2), the front protection member has a wall surface portion that covers a side surface facing the high-pressure cutout, and the wall surface portion has a side surface that is connected to the opening of the PD clamp. A PD clamp device characterized in that a notch is formed at a matching portion.

  According to (3), when the edge line in the vicinity of the high-pressure cutout is inserted into the notch in the wall surface part, the edge line is held in a state of being separated from the front side with respect to the back side surface of the protective member. Therefore, it becomes possible to easily perform the cutting operation of the edge line.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to improve the ease and safety | security of the operation | work which concerns on the removal of the rotating operation stick | rod from PD clamp, and replacement | exchange of a high voltage | pressure cutout.

It is a front view which shows the state equipped with the PD clamp apparatus 1 in 1st Embodiment of this invention in the rotation operation stick | rod 7 via the adapter 5 for PD clamp attachment. 2 is an explanatory diagram showing an internal configuration of a PD clamp 10. FIG. It is explanatory drawing which shows the external appearance of PD clamp. 4 is a perspective view showing a configuration of a protection member 4. FIG. It is explanatory drawing which shows an example of the attachment position of PD clamp. It is explanatory drawing which shows the state which attached PD clamp 10 to the edge line. It is explanatory drawing which shows the state which attached PD clamp 10 to the edge line. It is a perspective view which shows the structure of the protection member 4 which concerns on PD clamp apparatus 1 in 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a front view showing a state in which the PD clamp device 1 according to the first embodiment of the present invention is mounted on a rotary operation rod 7 via a PD clamp mounting adapter 5.

  The PD clamp device 1 includes a pair of PD clamps 10, a bypass line 12, and a protection member 14.

  2 is a cross-sectional view showing the internal configuration of the PD clamp 10, FIG. 3 is an explanatory view showing the appearance of the PD clamp 10, FIG. 3 (a) is a front view, and FIG. 3 (b) is a side view. The PD clamp 10 includes an insulating cover 20, an electric wire fastening piece 22, a needle electrode 24, a link member 26, a support bar 28, and an attachment portion 30.

  As shown in FIG. 3 (b), the insulating cover 20 is formed by combining a case body having a trapezoidal quadrangular prism shape in a side view with the back surface of a case body having a shape in which a lower surface of a hollow rectangular parallelepiped having a substantially square shape in plan view is opened. The cylindrical portion 20a is formed in the lower portion of the insulating cover 20. Furthermore, two grooves 20b are formed in the lower portion of the cylindrical portion 20a. As shown in FIG. 2, the groove 20b extends upward from a part of the lower end surface of the cylindrical portion 20a, further extends in the horizontal direction, and further extends downward, and is formed in a so-called J-shape. . The two grooves 20b are formed at positions rotated by 180 degrees with respect to the central axis of the cylindrical portion 20a.

  Moreover, as shown in FIG. 3A, an opening 20c is formed in the upper portion of the front surface of the insulating cover 20. The opening 20c extends in a direction perpendicular to the central axis of the cylindrical portion 20a and cuts out both side surfaces of the insulating cover 20 as shown in FIG. Further, when the insulating cover 20 is viewed from the side, the opening 20c extends from the front side to the center of the side surface and further extends upward, and is formed in a so-called L-shape.

  Inside the insulating cover 20 formed in this manner, as shown in FIG. 2, an electric wire fastening piece 22, a needle electrode 24, and a link member 26 are disposed.

  Needle electrode 24 is installed in the upper part of opening 20c in insulating cover 20, and electric wire clamp top 22 is installed in the lower part of opening 20c. The link member 26 is connected to the wire fastening piece 22 at one end, and the other end of the link member 26 is disposed in the cylindrical portion 20a.

  The needle electrode 24 has a sharp tip, and the tip protrudes downward from the L-shaped upper portion of the opening 20c when the insulating cover 20 is viewed from the side. The wire tightening piece 22 is disposed opposite to the tip of the needle electrode 24.

  The link member 26 includes a mechanism in which one end moves up and down when the rotation is transmitted to the other end and rotates. For this reason, the wire fastening piece 22 moves up and down in conjunction with the link member 26.

  The support rod 28 is a rod-shaped member having a thickness that can be inserted into the opening 20 c, is installed on the back side of the opening 20 c in the insulating cover 20, and protrudes laterally from the insulating cover 20. The longitudinal direction of the support bar 28 at this time is parallel to the direction in which the opening 20c extends.

  The support rod 28 is provided on one PD clamp 10 of the pair of PD clamps 10 and is not provided on the other PD clamp 10. Usually, the support bar 28 is fitted in the opening 20c of the other PD clamp 10. Thereby, a pair of PD clamp 10 is integrated.

  The attachment part 30 consists of a plate-shaped magnet formed in a U-shape. Moreover, the attachment part 30 is being fixed to the both sides | surfaces of the insulating cover 20, as shown to Fig.3 (a), and as shown in FIG.3 (b), the opening part 20c formed in the L-shape is shown. The periphery is surrounded by the attachment portion 30.

  In FIG. 1, the bypass line 12 is attached to each of the pair of PD clamps 10 and is electrically connected to the needle electrode 24 (see FIG. 2).

  The protection member 14 includes a protection member body 14a and a magnet 14b. FIG. 4 is a perspective view showing the configuration of the protection member 14, and the protection member main body 14a includes a rectangular central surface portion 14c and a wall surface portion 14d extending at right angles from both side portions opposed to the longitudinal direction of the central surface portion 14c. , 14d, and a member formed in a U shape when the central surface portion 14c and the wall surface portions 14d, 14d are viewed from the side. Both side surfaces of the protection member main body 14 a have the same shape as the attachment portion 30.

  The magnet 14b is formed in the same shape as both side surfaces of the protection member main body 14a, and is fixed to both side surfaces of the protection member main body 14a. In the present embodiment, the magnet 14b and the attachment portion 30 are the same member. In addition, if the member fixed to the both sides | surfaces of the protection member main body 14a is a member attracted | sucked to a magnet, it can apply instead of the magnet 14b. For example, an iron plate is applicable.

  In FIG. 1, the PD clamp mounting adapter 5 is interposed between the PD clamp 10 and the rotation operating rod 7, and has a rotating shaft 5 a that rotates independently with respect to the PD clamp mounting adapter 5 body inside. I have. One end of the PD clamp mounting adapter 5 main body is formed in a cylindrical shape into which the tip of the rotary operation rod 7 can be inserted, and the other end of the PD clamp mounting adapter 5 main body is a cylindrical portion of the PD clamp 10. The cylinder part 5b which can be inserted in 20a and the engaging pin 5c which is fixed to this cylinder part 5b and engages with the groove | channel 20b are provided.

  Further, in FIG. 1, the rotation operation rod 7 is provided in a long cylindrical rod-shaped member 7a, a mounting portion 7b fixed to the tip of the rod-shaped member 7a, and the rod-shaped member 7a. And an operation rod rotating shaft 7c that can rotate independently of each other. The mounting portion 7b has the same configuration as one end of the PD clamp mounting adapter 5 (the end on the PD clamp 10 side), and the operation rod rotating shaft 7c projects from the center. Further, the rotation operation rod 7 is provided with a handle (not shown) at the rear end portion, and the operation rod rotation shaft 7c rotates when the operator operates the handle.

  Then, the distal end portion of the rotation operation rod 7 is inserted and fixed to one end portion of the PD clamp attachment adapter 5 main body, whereby the PD clamp attachment adapter 5 is connected to the rotation operation rod 7. Further, the other end of the PD clamp mounting adapter 5 main body is inserted into the cylindrical portion 20a of the PD clamp 10, the PD clamp mounting adapter 5 is rotated, and the engaging pin is engaged with the groove 20b. The clamp mounting adapter 5 is connected to the PD clamp 10.

  When the rotary operating rod 7, the PD clamp mounting adapter 5, and the PD clamp 10 are connected to each other, the operating rod rotating shaft 7c included in the rotating operating rod 7 and the rotating shaft 5a included in the PD clamp mounting adapter 5 And the link member 26 of the PD clamp 10 are coupled. As a result, the wire tightening piece 22 can be moved up and down by the handle operation of the rotation operation rod 7.

  Next, an operation procedure until the failed high-pressure cutout is removed will be described.

  FIG. 5 is an explanatory view showing an example of the attachment position of the PD clamp. A transformer 102 and a brace 104 are mounted on the utility pole 100, and a high voltage cutout 106 is attached to the brace 104. A load side edge line 106a and a power source side edge line 106b extend from the high voltage cutout 106, the load side edge line 106a is connected to the transformer 102, and the power source side edge line 106b branches off from a transmission line (not shown). Connected to branch line. In the PD clamp device 1 shown in FIG. 1, one PD clamp 10 is attached to the attachment site A in the vicinity of the high-voltage cutout 106 on the load side edge line 106a shown in FIG. 5, and the other PD clamp 10 is shown in FIG. It attaches to the attachment site | part B of the high voltage | pressure cutout 106 vicinity in the power supply side edge line 106b shown.

  First, the worker attaches the protective member 14 to each of the pair of PD clamps 10. Whether the protective member 14 is attached to both side surfaces of the PD clamp 10 or only the side surface facing the high-pressure cutout 106 is appropriately determined by the worker according to the work environment. In the present embodiment, the protection member 14 is attached to both side surfaces of the PD clamp 10.

  Next, the worker connects the PD clamp mounting adapter 5 to the rotary operation rod 7, and further connects one PD clamp 10 to the PD clamp mounting adapter 5. Then, the operator operates the rotary operation rod 7 to insert the opening 20c of the PD clamp 10 into the load side edge line 106a extending from the high pressure cutout 106, and hooks the PD clamp 10 to the load side edge line 106a. The load side edge line 106a is disposed inside the protection member 14.

  Next, the operator operates the rotary operation rod 7 to move the PD clamp 10 to the high-pressure cutout 106 side, and brings the protective member 14 into contact with the high-pressure cutout 106 as shown in FIG. Then, the operator operates the handle of the rotary operation rod 7 to raise the wire clamping piece 22 of the PD clamp 10, inserts the needle electrode 24 into the load side edge line 106a, and connects the needle electrode 24 and the load side edge line 106a. It is electrically connected to the inner conductor.

  Next, the worker rotates the rotary operation rod 7 to remove the PD clamp mounting adapter 5 from the PD clamp 10, and connects the other PD clamp 10 to the PD clamp mounting adapter 5. Then, the worker operates the rotary operation rod 7 to insert the opening 20c of the PD clamp 10 into the power supply side edge line 106b extending from the high pressure cutout 106, and hooks the PD clamp 10 to the power supply side edge line 106b.

  Thereafter, the other PD clamp 10 is attached to the power source side edge line 106 b in the opening 20 c of the PD clamp 10 in the same procedure as the one PD clamp 10, and the PD clamp mounting adapter 5 is removed from the PD clamp 10.

  Next, as shown in FIG. 7, the operator inserts the underline cutter 50 into the protective member 14, and the load side edge from the high-pressure cutout 106 extending into the protective member 14 to the PD clamp 10. After the line 106a is cut and the power supply side edge line 106b is cut in the same manner, the failed high-voltage cutout is removed.

  As described above, according to the first embodiment of the present invention, the protective member 14 is mounted on the high-voltage cutout 106 side of the PD clamp 10, and the edge line is inserted into the opening 20 c and the protective member 14 of the PD clamp 10. Then, the protective member 14 is brought into contact with the high pressure cutout 106. At this time, the PD clamp 10 is adjusted so that the length of the high-pressure cutout 106 from the PD clamp 10 becomes an optimum length for both the cutting operation of the edge line and the operation of removing the PD clamp 10 from the rotary operation rod 7. Can be arranged. This makes it possible to easily determine the mounting position of the PD clamp. Further, when the rotation operation rod 7 is rotated to remove the PD clamp 10 from the rotation operation rod 7 by bringing the protection member 14 into contact with the high-pressure cutout 106, the protection member may prevent the PD clamp 10 from rotating. 14. Thereby, it is possible to smoothly remove the rotary operation rod 7 from the PD clamp 10.

  Further, when the edge line between the PD clamp 10 and the high-voltage cutout 106 is cut, the periphery of the cut surface of the edge line is surrounded by the protective member 14. Thereby, the safety of work is maintained and the work of attaching a terminal cap to the cut surface of the edge line can be omitted.

[Second Embodiment]
FIG. 8 is a perspective view showing a configuration of the protection member 14 according to the PD clamp device 1 in the second embodiment of the present invention. In addition, about the structural member same as the structural member of the protection member 14 in 1st Embodiment shown in FIG. 1, detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  As shown in FIG. 8, the protection member 14 in the second embodiment is provided with a side wall surface portion 14 e on the side surface facing the high-pressure cutout in the protection member 14 according to the first embodiment shown in FIG. 4. The side wall surface portion 14e is formed with a notch portion 14f into which an edge line is inserted.

  This notch part 14f is formed in the site | part facing the opening part 20c of the side surface of the PD clamp 10 in the side wall surface part 14e. That is, the shape of the notch 14 f matches the shape of the opening 20 c on the side surface of the PD clamp 10.

  According to the second embodiment configured as described above, when the edge line in the vicinity of the high-pressure cutout 106 is inserted into the notch part 14f of the side wall surface part 14e, the edge line is separated from the front side with respect to the center surface part 14c. Therefore, the edge line can be easily cut.

  The protective member 14 shown in FIG. 8 is provided with the side wall surface portion 14e on the side surface facing the high-pressure cutout 106, but is not limited thereto, and is provided at a position where the side wall surface portion 14e is slid inside the protective member 14. May be. Accordingly, when the base end portion of the edge line extending from the high-pressure cutout 106 is thick, the thick part of the edge line can be positioned inside the protection member 14.

  As mentioned above, although embodiment of this invention was described, embodiment based on this invention is not restricted to embodiment mentioned above. For example, a rubber member may be attached to the side surface of the protective member 14 that faces the high-pressure cutout 106. Thereby, when removing the PD clamp mounting adapter 5 from the PD clamp 10, it is possible to maintain the protective member 14 in contact with the high-pressure cutout 106, so that the PD clamp mounting adapter 5 is removed from the PD clamp 10. The removal work can be performed smoothly.

  Moreover, in embodiment mentioned above, although the magnet is used as the attaching part 30, it is not restricted to this, For example, you may use the tape and hook-and-loop fastener which have adhesiveness on both surfaces. Furthermore, you may provide the auxiliary attachment mechanism which clamps the back surface part of PD clamp 10 in the protection member 14. FIG.

DESCRIPTION OF SYMBOLS 1 Clamp apparatus 5 PD clamp attachment adapter 7 Rotation operation rod 10 Clamp 12 Bypass wire 14 Protective member 14a Protective member main body 14b Magnet 14c Central surface part 14d Wall surface part 14e Side wall surface part 14f Notch part 20 Insulation cover 20a Tube part 20b Groove 20c Opening part 22 Wire clamping piece 24 Needle electrode 26 Link member 28 Support rod 30 Mounting portion 50 Underline cutter

(3) (1), (2), before the protective member has a side wall portion covering a side surface facing the high pressure cutout, the said side wall portions, the opening in a side view the PD clamp A PD clamp device, wherein a notch is formed in a portion corresponding to the portion.

According to (3), if the edge line of the high pressure cutout vicinity is inserted into the notch of the side wall portion, the edge lines being held in spaced front side with respect to the inner side surface of the protection member Therefore, the edge line can be easily cut.

Claims (3)

A pair of PD clamps having an opening into which an edge line extending from the high-voltage cutout is inserted and a needle electrode inserted into the edge line inserted into the opening;
A bypass line for electrically connecting the needle electrodes of the pair of PD clamps;
The PD clamp is disposed on at least one side surface of both sides opposite to each other in a direction along the edge line inserted into the opening, and around a region from the high-pressure cutout to the PD clamp on the edge line. A protective member with a substantially U-shaped protective member in side view,
The PD clamp device includes a mounting portion that detachably attaches the protective member to both side surfaces. The mounting portion is composed of a magnet fixed to the PD clamp,
The PD clamp device according to claim 1, wherein the protective member includes magnetic members that are attracted to the magnet on both sides of a substantially U-shape. The protective member has a wall surface portion covering a side surface facing the high-pressure cutout,
3. The PD clamp device according to claim 1, wherein a cutout is formed in the wall surface portion at a portion that coincides with the opening of the PD clamp in a side view.

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