JP2907210B1 - Tower support mechanism of tower multi-point support tension insulator device - Google Patents

Abstract

To provide a steel tower supporting mechanism of a steel tower multi-point supporting tension insulator device in a transmission line having a horizontal angle and reducing the weight of an overhead wire fitting. SOLUTION: In a tower multi-point supporting tension insulator device of an overhead transmission line, a supporting point of a tower supporting portion having a horizontal angle in a transmission line, the length of which is required to be adjusted according to the horizontal angle. Overhead wire fitting 11 'with length adjustment function only for a'
The vernier metal fittings 14 are connected to each other, and at a support point a at the horizontal angle and on the starting point side, an integrated overhead wire fitting or a split type overhead wire fitting that becomes the single overhead wire fitting 11 having no insulator length adjusting function is provided. Connected to form a simple overhead wire fitting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel tower supporting mechanism of a steel tower multi-point supporting tensile insulator device serving as a tension insulator device for connecting an overhead transmission line to a tower or a wire clamp side.

[0002]

2. Description of the Related Art Generally, in a tower multipoint support system used for overhead power transmission lines, as a connecting portion on a tower side of a tension insulator device, for example, as shown in FIGS. In a normal mode having no horizontal angle, the double-strength insulator device 1 supports only two points (supporting points a at the same level) with respect to the tower arm portion 2, and the triple-strength insulator device 1 ′ However, the structure is supported by the tower arm 2 at three points.

However, when the transmission line has a horizontal angle α in these tension insulator devices, as shown in FIG. 8, the tension insulator device is a double tension insulator device 1 of a steel tower having a horizontal angle in the transmission line.
At the supporting points a and a ', the difference in the length of the insulator string 3 caused by the horizontal angle is adjusted by adjusting the length of one adjusting bracket (an overhead wire fitting) to secure the tension balance of each string of the tension insulator apparatus. There is a need. In this case, a vernier metal fitting 5 conventionally disposed between the steel tower mounting member 4 (supporting point side) and the steel tower side insulator 3a is used as an overhead wire metal fitting for adjusting the difference in insulator continuous length.
Will be used. However, this vernier metal fitting 5 is used for each insulator 3
And the connection between all of the tower mounting members 4 is interposed and connected, and among these, at least the vernier metal fittings 5 at the support point a ′ at the outer position apart from the support point a on the starting point side of the horizontal angle are appropriately extended,
With the setting of the extension amount s, two (multiple) insulator heads are aligned.

[0004]

As shown in FIG. 5, a vernier metal fitting 5 for adjusting the difference between the insulator lengths is composed of a pair of parallel long outer plates 5a and a long intermediate plate 5b provided in the gap between them.
Of the plurality of adjustment holes 6a and 6b drilled in the outer plate 5a and the middle plate 5b, respectively, and the adjustment bolts 7 are inserted into and connected to the adjustment hole positions that match appropriately. 6, a straight-line structure that obtains a predetermined length when tension is applied to both ends, or a pair of parallel fan-shaped outer plates 8a and an intermediate fan-shaped plate 8b inserted into the gap between the pair of fan-shaped outer plates 8a as shown in FIG. age,
Adjustment bolts 7 are inserted into connection positions of the adjustment holes 9a and 9b formed in the radial direction of the peripheral edge of the sector-shaped outer plate 8a and the sector-shaped middle plate 8b. Of a wide structure that obtains a predetermined length when it is suspended.

However, in such a vernier bracket configuration, a plurality of adjustment holes are formed in each of the pair of outer plates and the middle plate, so that a large number of steps are required for drilling holes, and the production is troublesome. In order to arrange it, the outer plate and the middle plate themselves must be made thicker to withstand the strength, and also need a length commensurate with the adjustment amount. It is bulky.

As described above, the difference in the length of the insulators of the tension insulator device caused by the horizontal angle of the transmission line is adjusted by the vernier metal fittings 5 connected to the tower supporting point a as described above. This length adjustment is not actually performed for all the tower support points as shown in FIG. That is, in the embodiment of the dual tension insulator device 1, it is only necessary to adjust only the other support point a 'adjacent to one of the right and left support points of the tower support point as a reference (start point). However, up to now, the vernier fitting (wire fitting with adjustment function) is also attached to the one supporting point, which is the reference point, so that the weight of the entire device becomes heavy, and the use of expensive vernier fittings is inevitable. This is unsuitable as a recent overhead wire fitting for cost reduction.

In view of the above situation, the present invention does not dispose vernier fittings at all of the tower support points of the tower multipoint support insulator device, and the support point on the reference side which does not require adjustment has a heavy weight. An object of the present invention is to provide a steel tower support mechanism of a steel tower multipoint support insulator device which solves the above-mentioned problem by using a lightweight and inexpensive single overhead wire metal fitting instead of an expensive vernier metal fitting.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a tower multi-point supporting tension insulator device used for overhead power transmission lines. A vernier fitting, which is an overhead wire fitting with a length adjustment function, is connected only to the support points that require length adjustment, and the support point on the starting side of the horizontal angle does not have a length adjustment function for the insulator string It is formed by connecting overhead wire fittings.

In this case, the single overhead wire fitting having no length adjusting function is an integrated overhead wire fitting made of a parallel clevis link or the like having a fixed length.

[0010] A single overhead wire fitting having no length adjusting function is a divided overhead wire fitting in which one link and two links are connected.

As described above, among a plurality of support points of the tower multi-point support system, at a position having a horizontal angle to the transmission line, one support point is set as a reference (start point), and the support point on the start side is an insulator. Since it is not necessary to adjust the length of the ream, it is sufficient to use only a single overhead wire fitting formed to a fixed length without using a heavy and expensive vernier fitting. This single overhead wire fitting may have a simple structure of an integral type such as a parallel clevis link or a split type configuration of three links.

That is, in the parallel clevis link mode which is an integral overhead wire fitting, it is only necessary to provide connecting holes at both ends. In addition, the split type overhead wire fitting which is a combination of three links has a simple structure in which a connection bolt hole is formed in a fitting portion between the two links and a single link, and a connection hole is formed in both connected ends. Each of them is a light weight type which requires only a minimum hole drilling, and the single overhead wire fitting is used at a horizontal angle at a reference-side support point, so that handling becomes easy.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a tower supporting mechanism of a tower multi-point supporting tensile insulator according to an embodiment of the present invention;

FIG. 1 shows an embodiment of a double-strength insulator device mounted on a steel tower having a predetermined horizontal angle with respect to a transmission line, wherein a steel tower supporting mechanism on the starting point side of the horizontal angle is a single integral overhead wire fitting. Is shown. Reference numeral 10 denotes a support on the starting point (reference) side with respect to the horizontal angle of the transmission line in the double tension insulator device 1 connected to a predetermined support point of the tower arm portion 2 as a retaining member by a right-angle clevis link type tower mounting member 4. It is a parallel clevis link of a fixed length for locking the insulator string 3 at the point a, and becomes a single overhead wire fitting 11. In this case, parallel clevis link 1
In the configuration of No. 0, as shown in FIG. 3, a shaft portion 10a of a predetermined length, a clevis portion 10b and a link portion 10c are integrally formed at both ends thereof, and connection holes 12a and 12b are formed in the clevis portion 10b and the link portion 10c. I wear it. The tower-side insulator 3a of the insulator string 3 is attached to the link portion 10c of the parallel clevis link 10.
Are connected via a ball clevis 13. Numeral 14 denotes a vernier metal fitting for connecting another insulator series 3 parallel to the insulator series 3 supported at a support point a 'at a position distant from the starting point, and serves as a wire fitting 11' having a length adjusting function. The construction of the vernier metal fitting 14 is similar to that of a general vernier metal fitting.
4b, the long outer plate 14a and the long inner plate 14b
The adjustment bolts 16 are inserted into appropriate positions of the large number of adjustment holes 15a and 15b provided in both of them to set a predetermined length (vernier extension), and the two insulator strings 3 and 3 are arranged in the line direction. Align the runners.

Now, the operation will be described. When the double tension insulator device 1 is installed on the transmission line in a manner having a horizontal angle, first of all, the parallel insulator trains 3, 3 have a starting point at a horizontal angle. The tower attachment member 4 attached to the support point a of the tower arm 2 on the side connects the parallel clevis link 10 which is a single overhead wire fitting 11 having no length adjustment function. A ball clevis 13 on the side of the insulator 3a is connected to the tip of the parallel clevis link 10 having the integral overhead wire bracket structure to form a single tension insulator device.

On the other hand, an overhead wire fitting 11 'having a length adjusting function of connecting another insulator series 3 attached to another supporting point a' to be adjusted in length due to the horizontal angle is the same as the conventional vernier. A metal fitting 14 is used. The amount of vernier extension of the vernier bracket 14 is obtained in advance by calculation, and is adjusted when assembling the insulator series on the ground. The vernier metal fitting 14 extends the long inner plate 14b appropriately to the long outer plate 14a, and inserts and connects the adjustment bolt 16 to the matching position of the two adjustment holes 15a and 15b. By appropriately setting the amount of vernier extension, the heads of the two insulator rows 3 and 3 are aligned as a whole so that each row of the tension insulator apparatus has a tension balance even if there is a horizontal angle in the line direction.

As described above, in the dual tension insulator device 1, the single overhead wire fitting 11 at the starting point side of the location where the transmission line has a horizontal angle is not adjusted in length. The simple structure described above can be used, and the weight of the metal fitting itself is reduced, so that the operation is not complicated as compared with the use of the conventional vernier metal fitting, and is good for ground work. The single overhead wire fitting 11, which is an integrated overhead wire fitting, may be a parallel clevis (not shown) in addition to the parallel clevis link 10.
In essence, a single bar with a fixed length may be used.

The tension insulator device shown in FIG. 2 is another embodiment in which the triple tension insulator device is mounted at a location where the transmission line has a horizontal angle as described above. In this case, the single overhead wire fitting 11 may be used as the overhead wire fitting of the single insulator series 3 attached to the support point a on the starting point side with respect to the horizontal angle because the length adjusting function is not required. That is, the parallel clevis link 10 serving as an integral overhead wire fitting is used. Also, the other two insulator trains 3,
Vernier fittings 14 and 14 having a length adjusting function are used as overhead wire fittings for retaining 3, and the vernier fittings 14 include two outer plates 14 a, one inner plate 14 b, and connection bolts 16. At this time, the length of the vernier fitting 14 at the outer position is set to be longer than the vernier extension of the intermediate position of the vernier fitting 14 for the middle connection.
The insulator heads 3 and 3 are aligned in the line direction to ensure tension balance.

Another embodiment shown in FIG. 4 is a case where the single overhead wire fitting 11 is a split type overhead wire fitting. The configuration of the split type overhead wire fitting 17 is a pair of two outer links 17a.
And an inner link 17b having one end inserted into the gap. The connecting bolt 18 is inserted into a single hole 19a, 19b at the joint between the outer link 17a end and the inner link 17b end. Integral fittings. Further, connecting holes 12a and 12b similar to the above are formed at both ends of the outer link 17a and the inner link 17b.

In this case, basically, similarly to the above-mentioned integral type overhead wire fitting, in the double tension insulator device 1, the overhead wire fitting which does not adjust the length of the starting point side at a location where the transmission line has a horizontal angle is provided. This split type overhead wire fitting 17 is used. The split overhead wire fitting 17 locks the connecting hole 12a at the tip of the outer link 17a to the tower mounting member 4 attached to the support point a of the tower arm portion 2, and the insulator 3 fits into the connecting hole 12b at the tip of the inner link 17b.
The ball clevis 13 on the a side is connected (not shown).

In this embodiment, the two outer links 17
a and one inner link 17b have a simple structure with a single overhead wire fitting 11 which is simply connected by one connecting bolt 18, so that even if a wall thickness satisfying the required strength is secured as compared with the vernier fitting, a thin plate can be obtained. It may be used, lightening is achieved, and handling becomes easy.

If there is no horizontal angle or the horizontal angle is small and it is not necessary to adjust all the vernier fittings, all the vernier fittings at the tower support point should be replaced with parallel clevis link type fittings or overhead wire fittings such as a three-link structure. Of course, it may be replaced with.

[0023]

As described above, the tower supporting mechanism of the tower multi-point supporting tension insulator device according to the present invention comprises an insulator attached to at least the starting point of the tower supporting portion having a horizontal angle to the transmission line. Simpler and lighter weight metal fittings (compared to vernier metal fittings) by using a single overhead wire fitting that is an integrated wire fitting consisting of parallel clevis links of a fixed length, instead of an overhead wire fitting that does not have a length adjustment function. (Approximately 1/3 to 1/5 lighter), which can be replaced with a vernier fitting having a complicated structure, a heavy weight and an expensive cost, and easy handling including ground work. Therefore, the cost of the insulator device can be reduced, and the weight of the insulator device can be reduced.

Further, the construction of the single overhead wire fitting may be an integrated body such as one parallel clevis link, a parallel clevis, or a split type overhead wire fitting connecting two outer links and one inner link. This also facilitates the production, which also leads to cost reduction, and has an effect suitable for recent labor saving.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a main part of an embodiment in which a double-strength insulator device is used in a tower supporting mechanism of a tower multi-point support tension insulator device of the present invention.

FIG. 2 is an explanatory view showing a main part of an embodiment in which the triple tension insulator device is used.

FIG. 3 is a perspective view of a parallel clevis link in which a single overhead wire fitting becomes an integral overhead wire fitting.

FIG. 4 is a perspective view of a three-link configuration according to another embodiment in which a single overhead wire fitting is a split type overhead wire fitting.

FIG. 5 is a perspective view of a vernier fitting which is a wire fitting of a conventional tension insulator device.

FIG. 6 is a perspective view of another embodiment in which the overhead wire fitting uses a sector yoke.

FIG. 7 is an explanatory view showing a use state of the tower multi-point supporting tension insulator device, wherein (A) is a plan view of the dual tension insulator device;
(B) is a plan view of the triple tension insulator device.

FIG. 8 is an explanatory view of the use of a vernier bracket of the dual tension insulator device when the transmission line has a horizontal angle.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 double tension insulator device 1 ′ triple tension insulator device 3 insulator string 3 a insulator 10 parallel clevis link 11 single overhead wire fitting 11 ′ overhead wire fitting having length adjustment function 14 vernier fitting 17 split type overhead fitting 17 a Two links 17b One link

Claims (3)

(57) [Claims] In a tower multi-point supporting tension insulator device used for overhead power transmission lines, it is necessary to adjust the length of the insulator string corresponding to the horizontal angle of the tower support portion having a horizontal angle in the transmission line. Vernier fittings, which are overhead wire fittings with a length adjustment function, are connected only to the support points to be connected, and a single overhead wire fitting that does not have the length adjustment function of the insulator string is connected to the support point on the starting side of the horizontal angle. A tower support mechanism of a tower multi-point support tension insulator device, characterized in that: 2. The steel tower support of the multi-point steel tower supporting tension insulator device according to claim 1, wherein the single overhead wire hardware having no length adjusting function is an integrated overhead wire hardware formed of a parallel clevis link or the like having a fixed length. mechanism. 3. The steel tower multipoint support tension insulator device according to claim 1, wherein the single overhead wire fitting having no length adjusting function is a split type overhead wire fitting connecting one link and two links. Tower support mechanism.