JP2023135485A - Slide assisting tool of ground tool for overhead transmission line - Google Patents

Abstract

To enable an adjustment of an attachment height of a ground tool, enable a rotation of them to a horizontal direction while being vertically inclined, expand a degree of freedom of a connection mode with the mounted ground tool, and realize efficiency of a ground operation of an overhead transmission line.SOLUTION: A slide assisting tool 1 includes: a slide part 2 that is sliding on an insulator string G while being over insulators G1 and G1; and an attachment part 3 which can detach and attach an insulation operation rod E1 to/from them while being coupled onto the slide part 2. The slide part 2 includes: a pair of slide boards 4 that is inclined to a direction where both end parts are separated from the insulator string G, and a side part is inclined so as to be engaged to a side part of the insulator string G, and if moved along the insulator string G while restricting the movement to the side direction in accordance with an extrusion by the insulation operation rod E1; and a binding member 5 that binds them while overlapping between the slide boards 4 and 4. The attachment part 3 includes: a frame 6 fixed to the binding member 5; an attachment clamp 7 that grips the insulation operation rod E1; and a support member 8 which can adjust the height of the attachment clamp 7 onto the frame 6 so as to be movable while being inclined to a vertical direction, and can rotatably support in horizontal.SELECTED DRAWING: Figure 1

Description

The present invention aims to prevent electric shock accidents due to residual voltage caused by electrostatic induction on the power transmission lines during construction of overhead power transmission lines. This relates to an auxiliary tool for operating an insulating operation rod to move an insulator chain that holds power transmission lines to a steel tower and connect a grounding clamp to the power transmission line side.

Grounding tools are used to ground power lines that have been cut off during work such as replacing or repairing overhead power lines.The grounding tools are used to ground power lines that have been cut off during work such as replacing or repairing overhead power lines. This type of grounding tool is equipped with a grounding clamp at the tip of an extensible insulated operating rod that grips power transmission lines or metal fittings around the power line, and is used by connecting a grounding wire connected to the grounding clamp to a steel tower. Overhead power lines are held to the tower via a pair of parallel insulators, so the grounding tool has an insulated operating rod that aims the grounding clamp at the tip to the position where it will grip the power line, etc. An auxiliary tool is attached to guide the insulator along the insulator chain.
As described in Patent Documents 1 to 4, conventional auxiliary tools include a sliding member that slides along the insulator chain while crossing between the insulators, and a mounting member on which an insulated operating rod can be detachably attached. Equipped with The sliding member has a tip portion curved with a bulge toward the insulator chain, and is inclined along the side of the insulator chain to restrain lateral movement.

Utility Model Publication No. 61-108007 Utility Model Publication No. 01-127313 Utility Model Publication No. 04-043321 Publication number 07-047929

In the conventional auxiliary tool attached to the insulated operating rod, the grounding clamp is connected to a metal fitting such as a power transmission line or nearby arc horn, so the connection height varies and long insulated operating rods are required. As the rod bends and the vertical angle between the insulator operation rod and the insulator chain changes depending on the distance traveled along the insulator chain, it is difficult to connect the grounding clamp at the tip of the insulator operation rod from the limited work space on the tower. It is difficult to adjust the position up or down. Grounding work is normally carried out by standing at the end of the tower arm (at the retaining part of the insulator strand), but if there is no space for the worker to stand, the grounding work is usually carried out by standing on the tip of the tower arm (at the retaining part of the insulator strand), but if there is no space for the worker to stand, the grounding work is carried out from a position close to the pylon on the arm that extends sideways from the pylon towards the insulator strand. However, since the insulated operating rod and the sliding member are fixed by the mounting member, it becomes difficult for the insulated operating rod to approach the connection destination of the grounding clamp. Since the sliding member is placed on a pair of parallel insulator series, it is not possible to provide an engaging means to prevent lateral movement on site, depending on the mutual spacing of the insulator series, which varies depending on the steel tower. The insulated operating rod has a telescoping structure that allows it to expand and contract, and each part has a different diameter, so the locations where it can be attached to the insulated operating rod are limited, and you may have to deviate from the correct mounting position. If the mounting position can be changed, the same insulated operating rod can be applied even if the height of the connection point or the bending of the insulated operating rod changes, or even if the hand position differs due to physical differences between workers. Very useful. When carrying the auxiliary tool up the tower, the worker ascending the tower can carry it easily, but the dimensions of the sliding member are fixed in advance according to the spacing between the insulators, so it is difficult to carry them up the tower. As the external size increases, auxiliary tools must be lifted using pulleys and ropes. It is not easy to attach the fastener to secure the insulated operating rod to the auxiliary tool with the appropriate gripping force, and excessive tightening may damage the insulated operating rod or incomplete fixation may impede movement of the insulated operating rod. There is a risk of
Therefore, the present invention adjusts the mounting height of the grounding tool, tilts the grounding tool up and down, and makes it horizontally swivelable, so that the attached insulated operating rod can be smoothly moved on the insulator chain. The purpose of the present invention is to provide a slide aid that facilitates the approach to the tip and makes the ground contact work more efficient.

In order to solve the above-mentioned problems, in the sliding aid of the grounding tool for overhead power transmission lines of the present invention, a power transmission line held at a steel tower is grounded through a pair of parallel insulator chains G in which a large number of insulators G1 are connected. Then, the insulated operating rod E1 is guided along the insulator link G toward the gripping position of the extensible insulated operating rod E1, which has a grounding clamp connected to the grounding wire at its tip, on or near the power transmission line. . The sliding aid 1 includes a sliding part 2 that slides on the insulator chain G while crossing between the insulators G1 and G1, and a mounting part 3 that is coupled to the sliding part 2 and allows an insulated operating rod E1 to be attached and detached. let The sliding part 2 has both ends inclined in a direction away from the insulator link G, and at least one side part of the sliding part 2 is inclined so as to engage with a side of the insulator link G, so that the sliding part 2 is tilted in a direction away from the insulator link G, and the side part is inclined so that at least one side part engages with the side part of the insulator link G. A pair of sliding plates 4 that move along the insulator chain G while being restrained from moving in the opposite direction, and a connecting member 5 that crosses between the sliding plates 4 and 4 and connects them are provided. The mounting part 3 includes a pedestal 6 fixed to the coupling member 5, a mounting clamp 7 for gripping the insulated operating rod E1, and a mounting clamp 7 on the pedestal 6, which is adjustable in height and tiltable up and down. A support member 8 that supports horizontally and pivotably is provided.

According to the present invention, the installation height of the grounding tool can be adjusted, the grounding tool can be tilted up and down, and it can be rotated horizontally, so that the device can be moved both horizontally and vertically relative to the mounted grounding tool. Since it can be displaced in a manner that allows it to tilt in any direction, the earthing tool can be moved smoothly on the insulator chain, making it easier to approach the earthing tool toward the connection position of the earthing clamp, and making the earthing work more efficient. It has the effect of being able to be converted into

FIG. 2 is a perspective view of a slide aid according to the present invention. FIG. 2 is a front view of the slide aid of FIG. 1; FIG. 2 is a side view of the slide aid of FIG. 1; It is a front view of an attachment part. FIG. 3 is a perspective view of the mounting clamp. FIG. 3 is a front view of the mounting clamp. FIG. 3 is a side view of the mounting clamp. It is a perspective view of a positioning clamp. It is a front view of a positioning clamp.

One embodiment of the present invention will be described based on the drawings.
In FIG. 1, the slide auxiliary tool 1 slides over a pair of parallel insulator chains G in which a large number of insulators G1 that hold the power transmission line to the steel tower are connected, and guides the grounding clamp of the grounding tool E from the steel tower side to the power transmission line side. It is something. The grounding tool E is equipped with a grounding clamp (not shown) at the tip that electrically connects to a peripheral conductor such as a power transmission line or an arc horn, and is an insulated operating rod E1 from which a grounding wire (not shown) connected to the steel tower T is drawn out from the grounding clamp. The grounding clamp is gripped by the object to be connected by opening and closing the insulated operating rod E1 at hand.

As shown in FIGS. 1 to 3, the slide auxiliary tool 1 is connected to a sliding portion 2 that slides along the insulator chain G while straddling the umbrella portions of the insulator G1, and is connected to an approximately intermediate portion of the sliding portion 2. and a mounting portion 3 to which an insulated operating rod E1 can be attached and detached.

The sliding portion 2 includes a pair of parallel sliding plates 4, 4 made of smooth FRP, and a coupling member 5 that connects the sliding plates 4, 4 to each other. The sliding plate 4 has a warped part 4a that slopes away from the insulator chain G toward the tip, and an engagement part that slopes along the opposite side of the insulator chain G to prevent it from moving laterally. 4b. The coupling member 5 consists of a pair of elongated plates having an L-shaped cross section and extending in the direction in which the sliding plates 4 are arranged and parallel to each other in the front and back. The coupling member 5 includes a long hole 5b through which a butterfly bolt 5a to be tightened to the sliding plate 4 is inserted, so that the fixing position with the sliding plate 4 can be adjusted. Note that, as long as the fixing position with the sliding plate 4 can be adjusted, a plurality of through holes into which the butterfly bolts 5a can be inserted may be used instead of the elongated holes 5b.

The mounting part 3 includes a pedestal 6 that is bolted across the connecting members 5, 5, a mounting clamp 7 that grips the insulated operating rod E1, a support member 8 that supports the mounting clamp 7 on the pedestal 6, and a mounting clamp. Positioning clamps 9 are provided at the front and rear of the insulated operating rod E1 to grip the insulated operating rod E1 and restrain movement of the insulated operating rod E1.

The pedestal 6 includes a support plate 10 whose both side edges are bolted to the coupling member 5, and a bracket 11 which stands vertically at the middle of the support plate 10.

As shown in FIGS. 6 and 7, the mounting clamp 7 is rotatably supported in the vertical direction by a horizontal axis between a bearing plate 12 having a substantially U-shaped cross section and both ends of an upright piece of the bearing plate 12. , a pair of mounting clamp pieces 13 and 14 that are provided with a gripping recess along the outer periphery of the insulated operating rod E1 and whose tip ends face each other so as to be openable and closable, and a first locking member 15 that holds the mounting clamp pieces 13 and 14 in the gripping position. and. The first locking member 15 has a base that is rotatably supported in the vertical direction by a horizontal rotating shaft at the distal end of one of the mounting clamp pieces 13, and when the mounting clamp pieces 13 and 14 approach each other, the other mounting clamp piece 14 The screw shaft 15a, which is the first screw, is inserted into the engagement recess 14a that opens at the front end of the screw shaft 15a, and the mounting clamp pieces 13, 14 are screwed together from the front end of the screw shaft 15a. It is provided with a threaded cylinder 15b which is a second screw that comes into pressure contact with each other. Inside the mounting clamp pieces 13 and 14, a pair of opposing semi-cylindrical synthetic resin adjusting collars 16 corresponding to the diameter of the insulated operating rod E1 are bolted and fixed to the insulated operating rod E1. This prevents damage caused by gripping the clamp pieces 13 and 14. Incidentally, the screw shaft 15a and the screw cylinder 15b may be replaced with each other by a screwing relationship.

The support member 8 is inserted into the vertical fitting gap 11a of the bracket 11, and includes a height adjustment plate 17 that is horizontally penetrated by the bracket 11 and the pivot pin 18, and an upper end of the height adjustment plate 17. It is provided with a clevis 20 that is vertically and vertically rotatably penetrated by the horizontal shaft 19 and is prevented from coming off by a nut to connect the height adjustment plate 17 to the mounting clamp 7. The height adjustment plate 17 is provided with a plurality of pin holes 17a for height adjustment arranged in the vertical direction through which the pivot pins 18 can be inserted and removed freely in the horizontal center portion. The clevis 20 vertically passes through the bearing plate 12 and is connected to a vertical shaft 21 which is horizontally rotatable and prevented from coming off.

As shown in FIGS. 8 and 9, the positioning clamp 9 is attached adjacent to adjustment collars 16 that protrude on both front and rear sides of the mounting clamp 7 on the insulated operating rod E1, and is attached to the insulated operating rod E1 from the mounting clamp 7. Prevent relative movement. The positioning clamp 9 includes a grip recess along the outer periphery of the insulated operating rod E1, and a pair of positioning clamp pieces 22 made of synthetic resin, which are rotatably connected to each other in the vertical direction by a horizontal axis, and whose distal ends face each other so as to be openable and closable. 23, and a clamp lever 24 which is a second locking means for holding the positioning clamp pieces 22, 23 in the gripping position. The positioning clamp piece 23 includes an engagement recess 23a that opens at the tip, and a notch 23b that makes the tip thin. The clamp lever 24 has a screw tube 24a, which is a first screw, which is vertically rotatably supported at the tip of one of the positioning clamp pieces 22 at its base, and a screw tube 24a, which has one end screwed into the screw tube 24a. A screw shaft 24b, which is a second screw, is inserted into the engagement recess 23a by rotation of the screw shaft 24b, and a knob 24d that contacts the notch 23b is fixed to the other end of the screw shaft 24b, and a spring cover 24e is provided around the screw shaft 24b. A tabular spring 24c is provided. The clamp lever 24 moves forward and backward along the threaded cylinder 24a by rotating around the threaded shaft 24b, and tightens and loosens the positioning clamp pieces 22 and 23. The spring 24c is locked between the knob 24d and the inner end of the spring cover 24e on the positioning clamp piece 23 side, and is contracted to its contracted length by tightening the knob 24d while the screw shaft 24b is engaged with the engagement recess 23a. The additional spring force becomes the gripping force of the positioning clamp pieces 22 and 23. In the initial engagement state between the screw shaft 24b and the engagement recess 23a, the spring 24c is in an uncompressed state, and a gap is formed between the positioning clamp piece 23 and the spring cover 24e to expose the screw shaft 24b. By tightening the knob 24d, the spring cover 24e comes into contact with the positioning clamp piece 23, and when the spring 24c is further compressed, the positioning clamp piece 23 is pushed toward the positioning clamp piece 22, and the insulated operating rod E1 is gripped. Incidentally, the threaded cylinder 24a and the threaded shaft 24b may be replaced with each other due to a threaded relationship.

When grounding a power transmission line using a grounding tool E, this sliding aid 1 adjusts the position of the butterfly bolt 5a within the elongated hole 5b as appropriate, and connects the engaging portions 4b, 4b of the pair of sliding plates 4, 4. Fix the distance so that it matches that of the insulator chains G and G, and select the pin hole 17a of the height adjustment plate 17 as appropriate depending on the connection position of the grounding clamp, pass the pivot pin 18 through it, and insert the insulated operating rod. Adjust the installation height of E1.

Next, select the mounting position on the insulated operating rod E1 as appropriate, sandwich the insulated operating rod E1 between the mounting clamp pieces 13 and 14 of the mounting clamp 7, and knock down the lock member 15 to attach the screw shaft 15a to the mounting clamp piece 14. When the insulated operating rod E1 is inserted into the engagement recess 14a and the threaded cylinder 15b is tightened, the mounting clamp pieces 13 and 14 firmly grip the insulated operating rod E1 via the adjustment collar 16.

Next, the front and rear sides of the adjustment collar 16 on the insulated operating rod E1 are sandwiched between the positioning clamp pieces 22 and 23 of the positioning clamp 9, and the clamp lever 24 is pushed down to push the screw cylinder 24a into the engagement recess 23a of the positioning clamp piece 23. Then, the positioning clamp pieces 22 and 23 firmly grip the insulated operating rod E1 to prevent displacement of the insulated operating rod E1 from the mounting clamp 7. When the screw cylinder 24a is inserted into the engagement recess 23a of the positioning clamp piece 23 and the screw shaft 24b is tightened, the clamp lever 24 elastically grips the positioning clamp pieces 22 and 23 with spring force, and the insulating operation rod To easily prevent slippage due to insufficient tightening of E1 and damage due to excessive tightening.

After connecting the grounding wire to the steel tower side, place the slide auxiliary tool 1 with the grounding tool E attached on the insulator chain G, and push out the insulated operating rod E1, and the slide auxiliary tool 1 will move over the insulator chain G. Move smoothly to guide the grounding clamp to the connection position. The support member 8 supports the mounting clamp 7 with respect to the sliding part 2 so as to be freely rotatable up and down by the connecting bolt 20, and is also rotatably supported by the rotating shaft 21, so that the long insulated operating rod E1 is bent and the insulator The relative inclination of the slide aid 1 with respect to the insulated operating rod E1 is widely allowed regardless of the traveling distance on the chain G or the different holding positions depending on the operator.

1 Slide aid 2 Sliding part 3 Mounting part 4 Sliding plate 4a Curved part 4b Engagement part 5 Connection member 5a Butterfly bolt 5b Elongated hole 6 Frame 7 Mounting clamp 8 Support member 9 Positioning clamp 10 Support plate 11 Bracket 11a Fitting Gap 12 Bearing plate 13 Mounting clamp piece 14 Mounting clamp piece 14a Engagement recess 15 Lock member 15a Screw shaft 15b Thread cylinder 16 Adjustment collar 17 Height adjustment plate 17a Pin hole 18 Pivot pin 19 Horizontal shaft 20 Clevis 21 Vertical shaft 22 Positioning Clamp piece 23 Positioning clamp piece 23a Engagement recess 23b Notch 24 Clamp lever 24a Threaded tube 24b Threaded shaft 24c Spring 24d Knob 24e Spring cover G Insulator chain G1 Insulator E Grounding tool E1 Insulated operating rod

Claims (8)

A grounding clamp of an extensible insulated operating rod having a grounding clamp at its tip to which a grounding wire is connected, in order to ground a power transmission line tied to a steel tower through a pair of parallel insulators connected with a large number of insulators. The insulating operation rod is guided along the insulator chain toward a gripping position on or near the power transmission line,
a sliding part that slides on the series of insulators while crossing between the insulators;
a mounting portion coupled to the sliding portion and capable of attaching and detaching the insulated operating rod;
The sliding part has both ends inclined in a direction away from the insulator chain, and at least one side part of the sliding part is inclined such that it engages with a side part of the insulator chain, so that the sliding part is inclined in a direction away from the insulator chain as the insulating operation rod is pushed out. a pair of sliding plates that move along the insulator chain while being restrained from moving in the opposite direction;
a connecting member that spans between the sliding plates and connects them;
The mounting portion includes a pedestal fixed to the coupling member;
a mounting clamp that grips the insulated operating rod;
A slide aid for a grounding tool for an overhead power transmission line, comprising a support member that supports the mounting clamp on the pedestal in a height-adjustable, vertically tiltable, and horizontally pivotable manner. . 2. The coupling member according to claim 1, wherein the coupling member is attached to at least one of the sliding plates so that its attachment position can be changed in the direction of the spacing between the sliding plates, and the mutual spacing between the sliding plates can be adjusted. Slide aid for grounding tool for overhead power transmission lines. The support member has a pivot portion supporting the mounting clamp at an upper portion thereof, and a pivot portion supported by the pedestal frame below the pivot portion,
a pivot pin that passes through at least one of the upper and lower pivots together with the pedestal or the mounting clamp;
A slide aid for an overhead power transmission line grounding tool according to claim 1 or 2, further comprising a height adjustment plate having a plurality of vertically arranged pin holes through which the pivot pin can be freely inserted and removed. . The support member includes a horizontal shaft that supports the mounting clamp in a vertically rotatable manner;
The sliding aid for an overhead power transmission line grounding tool according to any one of claims 1 to 3, further comprising a vertical shaft that supports the mounting clamp in a horizontally pivotable manner. The mounting clamp includes a pair of opposing mounting clamp pieces that grip the insulated operating rod;
a first locking means for fixing the pair of mounting clamp pieces to a gripping position of the insulated operation rod;
The first locking means includes a first screw whose base end is rotatably supported at the distal end of the one mounting clamp piece and is engageable with the other mounting clamp piece;
5. The fictitious device according to claim 1, further comprising a second screw that is screwed into the first screw and presses the other of the mounting clamp pieces toward one side by tightening. A sliding aid for grounding tools for power transmission lines. 6. An overhead power transmission line according to claim 1, further comprising collars detachably fixed to opposing portions of the pair of clamp pieces so as to surround the insulated operating rod. Slide aid for grounding tools. Any one of claims 1 to 6, further comprising a pair of positioning clamps that grip both front and rear sides of the mounting clamp on the insulated operating rod and prevent relative movement between the mounting clamp and the insulated operating rod. A sliding aid for grounding tools for overhead power lines. The positioning clamp includes a pair of opposing positioning clamp pieces that grip the insulated operating rod;
and a second locking means for fixing the pair of positioning clamp pieces to the gripping position of the insulated operation rod,
The second locking means includes a first screw whose base end is rotatably supported at the distal end of the one positioning clamp piece;
a second screw that extends by being screwed into the first screw, is capable of engaging with an engagement recess at the tip of the other positioning clamp piece, and pushes the other positioning clamp piece toward one side when tightened; ,
and a spring that is compressed between the second positioning clamp piece and the other positioning clamp piece when the second screw is tightened, tightens the positioning clamp by the length of contraction, and applies a gripping force to the insulated operating rod. A sliding aid for an overhead power transmission line grounding tool according to claim 7.

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