JP2005302584A - Thunder resistant horn having air gap adjusting arrangement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thunder resistant horn which can be installed without improving an existing transmission line supporting arrangement to a large extent, has an air gap adjusting arrangement of truss structure capable of finely adjusting the air discharge gap between a ground side electrode and a power applying side electrode easily, and accordingly is capable of setting the air discharge gap to a predetermined value easily. <P>SOLUTION: A plurality of mounting holes 1a, 1b formed in an existing horn mounting bracket 1 are used, and a truss structure is constituted of the mounting bracket 1, a sheet link 6a, and the base of a thunder resistant horn mounting member 6. A long square hole 6b is formed at the side of the base of the mounting member 6 being a component of the truss structure, and by using the square hole 6b and changing the triangular shape of the truss structure, the air gap G between the power applying side electrode 3 and the ground side electrode 8 of the thunder resistant horn 7 mounted on the tip of the mounting member 6 is adjusted by the air gap adjusting arrangement of truss structure having the thunder resistant horn. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention provides a lightning proof horn for an overhead power transmission line for grounding an abnormally high voltage caused by a lightning strike to a power transmission line quickly and preventing fusing of the power transmission line due to a subsequent arc. The present invention relates to a lightning proof horn having an air gap adjusting device between a ground side electrode and a power application side electrode.

  Conventionally, various lightning proof horn devices in which a grounding electrode of a lever device has a lightning protection function have been developed and put into practical use as a countermeasure against a lightning strike on a transmission line. The positional relationship between the discharge electrode arm attached to the lower part of the suspended insulator series and the grounding side electrode of the lightning insulator is required to be always within a predetermined distance, and the gap gap tolerance is 77 to 154 kV. In the class, it is a fairly strict dimension of about +0, −10 mm.

Various measures have been proposed in order to facilitate the adjustment of such an air gap in the field. As a concrete method,
(1) A lightning arrester connected in series to a horn-shaped spark gap between a transmission line and a tower arm-shaped support structure connected to the earth, the arm-shaped support structure having parallel sides of an isosceles trapezoid There is known a lightning arrester assembly for a transmission line which is constituted by a hanger structure, and the hanger structure is mounted under the end portion and has a function of positioning a spark gap between a first horn and a second horn. (For example, patent document 1).
(2) Further, in the lightning arrester provided with the discharge electrode at the tip of the lightning arrester main body and the mounting bracket fixed to the insulator device or the tower at the other end, the mounting bracket is connected by two parallel connecting links. It consists of a lightning arrester main body mounting adapter and a lever continuous mounting adapter, and by means of parallel movement of the connecting link in the longitudinal direction of the lever link, positioning of the lightning arrester main body, the discharge electrode, and the discharge electrode of the lever device facing this discharge electrode, There is known a gap type lightning arrester adapted to perform the gap adjustment (see, for example, Patent Document 2).
In addition, in a suspension apparatus of a suspended steel tower, a balance weight is mounted on the opposite side of the horn mounting bracket from the discharge electrode arm mounting side so that static balance can be maintained (for example, Patent Document 3). .

JP-A-11-195472 JP 2003-133029 A Japanese Utility Model Publication No. 05-074131

  However, in the device shown in [Patent Document 1], if the bolts at any two of the four fixing bolts at the nodes of the two parallel trapezoidal links are not fixed, the first horn and the second horn. There is a drawback that the spark gap interval between the horns cannot be fixed and adjusted. Furthermore, the spark gap interval adjusting device using such a link mechanism has a safety problem such that the free movable range is too large and the horns collide with each other or the fingers are pinched between the parallel links.

  [Patent Document 2] also uses the same link mechanism as in [Patent Document 1], and the positioning of the lightning protection device body, the discharge electrode, and the insulator facing this discharge electrode by the parallel movement of the connecting link in the longitudinal direction of the insulator link. Since the gap type lightning arrester is adapted to adjust the gap with the discharge electrode of the device, the above-mentioned problems are pointed out.

  [Patent Document 3] When a balance weight is installed on one side and the gap interval is adjusted efficiently, it is effective for maintaining a static balance, but with a slight external force because it is balanced. It is easy to vibrate. For this reason, there has been a problem that vibration generated during installation or use cannot be sufficiently suppressed, and it takes time to adjust the gap interval. Further, since the balance weight is attached and detached on the steel tower to adjust the gap interval, there is a risk that the balance weight is dropped, and there is a problem that it is difficult to adjust the attachment by one person.

  Accordingly, an object of the present invention is to be able to install a lightning proof horn without significantly modifying an existing transmission line support device, and to safely and easily fine-tune the air discharge gap between the ground side and the power application side electrode. Accordingly, it is an object of the present invention to provide a lightning-resistant horn having a truss-structured air gap adjusting device that can easily set the air discharge gap to a predetermined value.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a plurality of mounting holes 1a. 1b is used to form a truss structure at the base of the horn mounting bracket 1, the single link 6a and the lightning-resistant horn mounting member 6, and an oblong hole is formed on the base side of the lightning-proof horn mounting member 6 which is a component of the truss structure. 6b is provided, and the triangular shape of the truss structure is changed by using the elongated hole 6b, so that the earthing side electrode 8 and the charging side electrode 3 of the lightning proof horn 7 attached to the tip of the lightning proof horn mounting member 6 A lightning proof horn having a truss structure air gap adjusting device characterized in that the intermediate gap G is adjusted.

  According to a second aspect of the present invention, in the lightning-resistant horn having the truss structure air gap adjusting device according to the first aspect, the bolt for connecting the lightning-resistant horn mounting member 6 having the long hole 6b and the single link 6a is square. A lightning proof horn having a truss structure air gap adjustment device characterized by preventing co-rotation as a round head bolt.

  According to a third aspect of the present invention, in the lightning-resistant horn having the truss structure air gap adjustment device according to claim 1 or 2, the truss structure air gap adjustment device is provided between the ground side or the ground side and the power application side. A lightning proof horn having an air gap adjusting device having a truss structure, which is provided at a plurality of locations.

  According to a fourth aspect of the present invention, in the lightning-resistant horn having the truss structure air gap adjusting device according to any one of the first to third aspects, the mounting arm 9 is provided on the opposite side of the horn mounting bracket 1 to which the lightning-resistant horn 7 is mounted. At the tip of the mounting arm 9, an elongated hole 9b is provided separately from one round hole 9a. A balance wit 10 is rotatably attached to the round hole 9a. A lightning proof horn having a truss structure air gap adjustment device, wherein a plurality of moment adjustment holes 11 are provided on the side, and the moment adjustment is performed without attaching / detaching at least the balance weight 10 from the attachment arm 9. is there.

According to the present invention, the following advantages can be provided, and an industrially significant effect can be obtained.
1) Adjusting the air gap G between the ground side electrode 8 and the power application side electrode 3 of the lightning protection horn 7 attached to the tip of the lightning protection horn attachment member 6 by changing the triangular shape of the air gap adjustment device of the truss structure. Therefore, it is possible to safely and quickly install the lightning proof horn and adjust the air gap by one worker.
2) Since this is a truss structure air gap adjustment device, the truss structure triangle shape can be fixed by tightening any of the three nodes, so the air gap between the electrodes can be quickly adjusted to the specified dimensions. And can be fixed.
3) Since the truss structure air gap adjustment device may be provided at a plurality of locations in some cases, the truss structure air gap adjustment device can be made compact, and the adjustment width of the air gap can be easily expanded. Applicable to lightning horns of various lengths.
4) Since the moment weight is adjusted without attaching / detaching the balance weight 10 to / from the attachment arm 9, the moment adjustment work is safe and the work can be performed independently.

An embodiment of the present invention will be described.
[First invention]
FIG. 1 is a front view showing an embodiment in the case where the present invention is applied to a single suspended insulator device. In the figure, 1 is a horn mounting bracket, and a hole at a central suspension point P is to a steel tower (not shown). It is a mounting hole for the hanging bracket. An insulator series 2 is suspended just below the suspension point P, a parallel clevis 4 is coupled to the lower end thereof, and a lower horn mounting bracket 5 is coupled to the parallel clevis 4 so as to be rotatable in the vertical direction. . The voltage application side electrodes 3 are fixed to both ends of the lower horn mounting bracket 5. Although not shown, the lower horn mounting bracket 5 has a structure in which a power transmission line is suspended movably in the line direction and the line vertical direction by a free center type suspension clamp at the center lower end. Reference numerals 1a and 1b denote a plurality of mounting holes provided in the horn mounting bracket 1.

Reference numeral 6 denotes a lightning resistant horn mounting member, and as shown in FIG. 2, a square hole 6c adapted to the mounting hole 1a and a long angle hole 6b for adjusting the air gap G are provided at the base. In addition, 6e in the single link 6a shown in FIG. 3 is a round hole for attaching the base metal fitting 7c of the lightning proof horn 7 provided at the tip of the lightning proof horn attachment member 6.
Therefore, using the plurality of mounting holes 1a and 1b, a truss structure is formed at the base of the horn mounting bracket 1, the single link 6a, and the lightning resistant horn mounting member 6, and a lightning resistant horn mounting that is a component of the truss structure. Using the long hole 6b on the base side of the member 6, the ground side electrode 8 and the charging side electrode 3 of the lightning proof horn 7 attached to the tip of the lightning proof horn mounting member 6 by changing the triangular shape of the truss structure The air gap G is adjusted. Moreover, 6d is a convex portion forming portion corresponding to the thickness of the horn mounting bracket 1, as shown in FIG. 3, and is integrally formed so as not to be separated from the single link 6a.

  The 1st invention which consists of the above structure turns the one link 6a back and forth around the attachment hole 1a along the long hole 6b, and thereby the grounding side electrode 8 of the lightning proof horn 7 and the electric charging side The air gap G with the electrode 3 can be easily adjusted. During this adjustment work, all the bolts at the nodes are temporarily fixed, so there is no risk of the bolts and nuts falling off, and it can be safely installed by one person and the air gap adjustment work. . Thus, in this invention, compared with the conventional lightning-resistant horn without the air gap adjustment function, the workability for installation can be made excellent. FIG. 4 shows the detailed shape of the ground side electrode 8 attached to the lower side of the lightning proof horn 7. In the present invention, the truss structure is utilized by utilizing the elongated hole 8b of the ground side electrode 8. The adjustment function of the air gap adjustment device can be reinforced.

[Second invention]
2nd Embodiment of this invention is related with the improvement of the workability | operativity at the time of an air gap adjustment, In the lightning-proof horn which has the air gap adjustment apparatus of a truss structure, the lightning-proof horn attachment member 6 which has the long hole 6b, The bolt that connects the single link 6a is characterized by preventing co-rotation as a round-headed round head bolt. That is, in order to adjust the air gap, when moving from the temporary tightening to the final tightening operation, the operation is a one-handed operation because it is an operation at a high place. In particular, in tightening operations such as bolts, there is a problem that it is difficult to perform reliable final tightening due to the fact that the holes are round holes.
In the present invention, in particular, the base side two places (6b, 6c) of the lightning proof horn mounting member 6 of the truss mechanism are formed as long holes or square holes to prevent co-rotation with the round head bolts adapted to the square holes. It is intended to improve workability. In particular, in the case of the long-angle hole 6b, if the bolt is a conventional bolt, the bolt rotates during the final tightening and the fixing position shifts, and fine adjustment of the air gap G is difficult. In the present invention, since the round-corner bolt is applied to the elongated hole portion 6b, the corner of the bolt can smoothly slide in the elongated hole, and the air gap can be finely adjusted without rotating together. Can be performed quickly and safely.

[Third invention]
The third embodiment of the present invention relates to an adjustment width expansion and compactification of an air gap adjustment device having a truss structure. That is, in the lightning proof horn, the length of the lightning proof horn and the length and shape of the insulator device differ depending on the voltage class in which it is used, so it is difficult to standardize the air gap adjustment device, and various air gap adjustment devices. There was a problem that it was necessary to prepare the same and the cost was high.
Therefore, in order to solve this problem, in the third embodiment, the air gap adjustment device can be installed at a plurality of locations, and the adjustment width of the air gap can be greatly expanded even if the length of the lightning proof horn changes. It is what I did. If it is attempted to deal with the installation at one place, the members of the truss structure will be long, and there will be a problem that mechanical and electrical clearances with steel tower members and insulator devices cannot be secured. If installed, the above-described problems can be solved, and there is an advantage that the air gap adjusting device of the truss structure can be made compact and standardized.

[Fourth Invention]
The fourth embodiment of the present invention relates to a moment adjustment structure for the balance weight 10. That is, as shown in FIG. 1, a mounting arm 9 is fixed to the opposite side of the horn mounting bracket 1 to which the lightning proof horn 7 is mounted, and a long rectangular hole is formed separately from one round hole 9a at the tip of the mounting arm 9. 9b is provided, and the balance wit 10 is rotatably attached to the round hole 9a, and a plurality of moment adjustment holes 11 are provided on one side of the balance wit 10, and at least the balance wit 10 is attached to and detached from the mounting arm 9. It is a lightning-resistant horn characterized by adjusting the moment without any problems.
That is, when the lightning proof horn 7 is unevenly distributed on one side of the horn mounting bracket 1, an unbalanced moment is generated on the left and right of the suspension shaft P, and a stable air gap G may not be maintained. Therefore, it is necessary to install a balance weight 10 that balances the moment. In the present invention, as described above, in FIG. 1, the balance weight 10 can be rotated as indicated by the broken line with the round hole 9a as the rotation axis, and the right and left moments are balanced at an appropriate position. It is intended to be fixed. Therefore, since the weight attaching / detaching work dangerous on board can be omitted as in the conventional lightning proof horn, the installation work can be made highly safe.

  FIG. 5 shows an embodiment in which the present invention is applied to a double tension insulator device, and those having the same shape and function are indicated by the same reference numerals as those in FIG. In FIG. 5, reference numeral 12 denotes a pair of double yokes. A plurality of levers 2 are connected between the double yokes via a right angle clevis link 13 and a right angle clevis 14 to constitute a double tension tension insulator device. Reference numeral 15 denotes a power application side electrode. Reference numeral 16 denotes a T-shaped horn mounting bracket attached to the ground side double yoke 12, and two mounting holes for mounting the lightning resistant horn mounting member 6 and the single link 6a are provided on the vertical leg thereof. Yes. A lightning resistant horn mounting member 6 and a single link 6a are connected to the vertical leg hole of the T-shaped horn mounting bracket 16 with a bolt to form a truss structure. A square hole 7a suitable for the fixing hole provided in the metal fitting 7c is provided, and the lightning protection horn 7 is attached by preventing the rotation by a square root round head bolt, and the grounding side electrode 8 and the charging side electrode 15 are opposed to each other. And the air gap G is adjusted. In the case of the double tension insulator device, the horizontal tension acting on the double yoke 12 is very large with respect to the bending stress caused by the bending moment of the lightning proof horn, and the relative swinging hardly occurs. No weight is required.

  FIG. 6 is a plan view (a) and a side view (b) of a single lightning proof horn 7 used in the present invention, and its detailed structure is as shown in, for example, Japanese Patent Application Laid-Open No. 2002-353009. Although explanation is omitted, the base side metal fitting 7b of the lightning proof horn 7 may be changed by 90 degrees from FIG. 6A as shown in FIG. When the base metal fitting 7b as shown in (a ') is used, when adjusting the air gap G between the ground-side electrode 8 and the voltage-applying side electrode 3 or 15, not only the vertical direction but also the deviation in the direction perpendicular to the line is also observed. Since the three-dimensional adjustment is possible, there is an advantage that the air gap G can be adjusted more accurately.

As described above, the case where the present invention is applied to a series of suspension insulator apparatuses and a double tension insulator apparatus has been described. However, the present invention is not limited to this application. For example, a series of tension insulators, a double suspension insulator apparatus, and a long trunk It can also be installed in a V-hanging hanging lever device or a long trunk supporting lever device using a lever, and has a very wide practical range.
The present invention is not limited to the above-described embodiment, and can be implemented by changing the configuration of each part as follows without departing from the spirit of the present invention.

1) Provide truss mechanisms at multiple locations to expand the air gap adjustment range. For example, it is provided on the base metal fitting 7c side of the lightning proof horn 7, or is provided on the power application side electrode 3 or 15 side.
2) A plurality of moment adjustment holes 11 provided in the balance weight 10 are made into long-angle holes, and moment adjustment can be continuously adjusted.
3) The air gap adjustment width is enlarged by using the round hole 6e of the single link 6a as a long hole.
4) The center of gravity of the plate-like balance weight 10 holding the mounting arm 9 from both sides is unevenly distributed on the ground side. In other words, the lower portion of the balance weight 10 on the ground side is formed into a thick shape, and a fan-like shape such as a looseness adjusting bracket.
5) Also, the moment should be adjusted by sliding the balance weight in the elongated hole of the mounting arm 9.
6) The balance weight should be a single plate or changed to an appropriate shape.
7) All the tightening bolts are square root round head bolts to prevent co-rotation and enable one-hand tightening work.
8) Install cotter pins on the tightening bolts to prevent the components from falling off even if the bolts are loosened.
If the above changes are appropriately adopted, the added value of the present invention can be further enhanced.

The side view which shows the case where the lightning proof horn which has the air gap adjustment apparatus by this invention is applied to a 1 chain suspension insulator apparatus. The top view (a) and side view (b) of the lightning-proof horn attachment member 6. FIG. The top view (a) and side view (b) of one link. The top view (a) and side view (b) of a ground side electrode. The side view (a), the top view (b), and the top view (c) which show the case where the lightning-proof horn which has this invention air gap adjustment apparatus is applied to a double tension tension insulator apparatus. A plan view (a) and a side view (b) showing the external appearance of the lightning proof horn 7 alone, and a partially missing plan view showing a shape assembled by rotating the grounding horn mounting bracket 7b of the lightning proof horn 7 alone by 90 degrees. (A ').

Explanation of symbols

1 Horn mounting bracket
1a, 1b Mounting hole
2 Choshiren
3,15 Power-side electrode
4 Parallel clevis
5 Section horn mounting bracket
6 Thunderproof horn mounting member
6a 1 link
6b, 9b long hole
6c, 7a square hole
6d Convex forming part
6e, 9a round hole
7 Lightning proof horn
7b Ground side horn mounting bracket
7c Base bracket
8 Grounding electrode
8b slotted hole
9 Mounting arm 10 Balance weight 11 Moment adjusting hole 12 Double yoke 13 Right angle clevis link 14 Right angle clevis 16 T-shaped horn mounting bracket
G Air gap
P Hanging bracket mounting hole

Claims (4)

  A truss structure at the base of the horn mounting bracket (1), the single link (6a), and the lightning proof horn mounting member (6) using a plurality of mounting holes (1a, 1b) provided in the horn mounting bracket (1) An elongated hole (6b) is provided on the base side of the lightning resistant horn mounting member (6), which is a component of the truss structure, and the triangular shape of the truss structure is changed using the elongated hole (6b). The air gap G between the ground-side electrode (8) and the charging-side electrode (3) of the lightning-resistant horn (7) attached to the tip of the lightning-resistant horn mounting member (6) is adjusted. A lightning-resistant horn having an air gap adjusting device. In the lightning proof horn having the air gap adjusting device according to claim 1,
Bolt for connecting lightning-resistant horn mounting member (6) having a long angle hole (6b) and one link (6a) is prevented from co-rotation as a round-corner head bolt, and an air gap adjusting device characterized in that With lightning proof horn. In the lightning proof horn having the air gap adjusting device according to claim 1 or 2,
A lightning proof horn having an air gap adjusting device, wherein the air gap adjusting device of a truss structure is provided at a plurality of locations on the ground side or the ground side and the power application side. In the lightning proof horn having the air gap adjusting device according to any one of claims 1 to 3,
A mounting arm (9) is fixed to the opposite side of the horn mounting bracket (1) to which the lightning proof horn (7) is mounted, and a long angle is provided separately from one round hole (9a) at the tip of the mounting arm (9). A hole (9b) is provided, a balance wit (10) is rotatably attached to the round hole (9a), and a plurality of moment adjustment holes (11) are provided on one side of the balance wit (10). A lightning-resistant horn having an air gap adjusting device, wherein the moment is adjusted without attaching / detaching the balance weight (10) to / from the mounting arm (9).

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