JPH0247805B2 - TAIRAIHOONGAISHISOCHINIOKERUGAISHITORITSUKEKANAGU - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention promptly grounds the large current caused by lightning when it flows through a power transmission line, and also prevents the power transmission line from being damaged by the connection arc that occurs afterwards. The present invention relates to an insulator mounting bracket in a lightning horn insulator device for an overhead power transmission line to prevent melting.

(Prior Art) Conventionally, there has been a device as shown in FIG. 7 as a device for installing a lightning arrester insulator with a predetermined air discharge gap to a power transmission line.

Roughly speaking, this device has an electric wire 4 supported at the lower end of a hanging insulator 17 suspended below a support arm 1 of a tower body, and a lightning arrester 19 attached to the side of the hanging insulator 17. It is something.

A lower arc horn 24 that is bent upward is attached to the lower cap metal fitting 31 of the hanging insulator 17. Further, a supporting metal fitting 33 extending laterally and having an upwardly bent tip is fixed to the upper cap metal fitting 32, and a lightning arrester 19 is slanted downward and suspended from the tip of the metal fitting 33. has been done. Furthermore, an upper arc horn 24 is attached to the lower part of the lightning arrester 19 so as to be inclined downward, and both the upper and lower arc horns 24 face each other with a predetermined air discharge gap G therebetween.

(Problems to be Solved by the Invention) However, in the conventional device, the lightning arrester 19 is installed in an inclined state with respect to the suspension insulator 17, so that the load of the lightning arrester 19 is Insulator 1
Acts as a bending moment on the upper end of 7,
For this reason, the hanging insulator 17 was tilted from a vertical position toward the tower body, making the installation state unstable.

By the way, generally when the electric wire 4 is supported by the hanging insulator 17, the electric wire 4 hanging on the hanging insulator 17 is
The lifting load and pulling load differ depending on the installation location of the tower body and the difference in installation height between adjacent tower bodies. For this reason, using the conventional insulator device as described above, it is difficult to set the static balance of the device in a stable state according to the load of the electric wire 4, which differs from tower to tower body. Due to the tilted state, there was a possibility that the insulation interval between the tower body and the electric wire 4 would be affected.

In view of the above circumstances, it is an object of the present invention to provide an insulator mounting bracket for a lightning horn insulator device that can be installed in a stable state in response to the different loads of electric wires for each tower body.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention connects a mounting bracket rotatably to the support arm 1 of the tower body, and the mounting bracket includes: A suspension insulator 17 for supporting the electric wire 4 is connected and suspended, and a lightning arrester 19 is also suspended and fixed to the mounting bracket. A lightning protection device in which the discharge electrode on the power side extends laterally, and the discharge electrode attached to the lower part of the lightning arrester 19 and the discharge electrode on the power side are separated by a predetermined aerial discharge gap G. In the horn insulator device, the mounting bracket is configured into a triangular link mechanism by a hanging link 5, a horizontal support arm 7, and a connecting link 9 that are pivoted to each other, and the link mechanism includes at least one link. A configuration in which a length adjustment means is provided is adopted.

(Operation) This invention operates as follows by employing the above means.

When the length of the link is adjusted using the length adjustment means of at least one link of the linkage mechanism according to the wire load that differs for each tower body, the horizontal support arm is in a horizontal state, and the hanging insulator and lightning arrester are The insulator is suspended in a stationary state. As a result, no bending load is applied to the hanging insulators and lightning arrester insulators, and the insulation interval is also ensured.

(Example) Hereinafter, an example embodying this invention will be described in the first to
This will be explained in detail based on FIG.

A bifurcated bearing member 2 is fixed to the lower surface of the tip of the support arm 1 of the tower body. The mounting bracket of this embodiment is rotatable with respect to the bearing member 2 through the shaft 3 only in a direction perpendicular to the electric wire 4 located below, that is, in a direction perpendicular to the electric wire (hereinafter referred to as a direction perpendicular to the line). connected.

To explain in detail based on FIG. 2, the mounting bracket is a suspension that is attached to the shaft 3 and is connected to the bearing member 2 so as to be rotatable only in the left and right directions (arrows P and Q directions), that is, in the direction orthogonal to the track. The lower link 5 and a horizontal support arm 7 connected to the lower end bearing portion 5a of the hanging link 5 by a shaft 6 so as to be relatively rotatable in the vertical direction.
and a bearing member 7a welded to the horizontal support arm 7 and a bearing member 5 welded to the suspension link 5.
shafts 8, 8 for relative rotation in the vertical direction between
A substantially triangular link mechanism is constructed by the connecting links 9, which are connected by turnbuckles and serve as link length adjustment means.

The horizontal support arm 7 includes an arm piece 10 rotatably connected to the shaft 6, and an arm piece 1 connected to the arm piece 10 by locking bolts 11, 11.
2, and a mounting plate 13 welded to the tip of the arm piece 12.

As shown in FIG. 3, the horizontal support arm 7 has an arm piece 12 fitted into a gap 10b provided along the central longitudinal direction of the arm piece 10, and
The holes 10a of the locking bolts 11 provided in plurality in the longitudinal direction of the arm piece 10 and the holes 1 of the locking bolts 11 provided in plurality in the longitudinal direction of the arm piece 22.
The length of the arm 7 can be adjusted by changing its position with respect to the arm 2a.

A right-angled clevis link 14 is welded to the lower surface of the base end of the arm piece 10 of the horizontal support arm 7. The right angle clevis link 14 is provided with a shaft 15 in a direction orthogonal to the rotation direction of the suspension link 5;
That is, the cap fitting 18 of the hanging insulator 17 is also connected to the shaft 15 so as to be relatively rotatable in the track direction via the connecting piece 16 which is connected so as to be relatively rotatable in the track direction.
are connected by. The hanging insulator 17 remains perpendicular to the horizontal support arm 7 and can swing only in the direction perpendicular to the track. Further, an upper electrode 19a of a lightning arrester 19 is fastened to the mounting plate 13 with bolts, and the lightning arrester 19 is mounted so as to be perpendicular to the horizontal support arm 7 and parallel to the hanging insulator 17. It is worn.

A parallel clevis 20 as a lower metal fitting is attached to the lower part of the hanging insulator 17, and a horn mounting metal fitting 22 also as a lower metal fitting is connected to the parallel clevis 20 so as to be relatively rotatable in the track direction by a shaft 21. A suspension clamp 23 for gripping the electric wire 4 is connected to the lower part thereof by a shaft 21 so as to be relatively rotatable in the line direction. Further, an arc horn 24 serving as a discharge electrode on the energizing side is attached to the horn mounting bracket 22 in a direction perpendicular to the line. The arc horn 24 has a curved tip pointing downward, is attached to the lower electrode 19b of the lightning arrester 19, extends in the line direction, and extends along the shaft 1.
It faces a discharge electrode 25 which is curved in a semicircular arc shape centered at 5 with a predetermined aerial discharge gap G therebetween.

Next, the function of the insulator mounting bracket in the lightning horn insulator device constructed as described above will be explained.

Now, in order to install the insulator device on the support arm 1 of the tower body, the length of the horizontal support arm 7 is adjusted to ensure a predetermined clearance between the hanging insulator 17 and the lightning arrester 19, which has been confirmed in advance. C and a predetermined aerial discharge gap G. Further, the connecting link 9 is set to a predetermined length in accordance with a predetermined average load value so that the horizontal support arm 7 is in a horizontal state.

Next, the insulator device is suspended from the support arm 1 of the tower body, and the electric wire 4 is supported by the suspension clamp 23 at the lower end of the suspended insulator 17. By the way, the load of the electric wire 4 applied to the hanging insulator 17 differs depending on the tower body, so if a load larger than a predetermined average load value is applied to the hanging insulator 17, the entire insulator device will be centered around the shaft 3. 1, and the horizontal support arm 7 is tilted upward to the left. At this time, by lengthening the connecting link 9, the horizontal support arm 7 is corrected horizontally, and the hanging insulator 17 and lightning arrester 19 are suspended vertically. On the other hand, when the load of the electric wire 4 is smaller than a predetermined load, the horizontal support arm 7 is tilted upward to the right, so if the connecting link 9 is shortened, the horizontal support arm 7 is corrected to be horizontal. In this way, the hanging insulator 17 and the lightning arrester 19 are in a stable installed state.

In a device installed in this manner, when the load balance of the electric wire 4 changes due to snow accumulation, for example, the electric wire 4 swings in the direction of the track. Then, the swing of the electric wire 4 is transmitted to the hanging insulator 17 via the hanging clamp 23.
As shown in FIG. 4, the suspension insulator 17 is
Only the rails swing in the direction of the track (arrows R and S). In this state, the hanging insulator 17 is connected to the right angle clevis link 1.
The hanging insulator 17 is rotated around the shaft 15 of 4.
The lower arc horn 24 moves in an arc shape around the shaft 15, and also moves approximately corresponding to the curved creeping surface of the discharge electrode 25 at the lower end of the lightning arrester 19, so that the air discharge gap G is approximately constant. is maintained. Further, no unreasonable force is generated that may cause twisting of the link mechanism or the lightning arrester 19.

Furthermore, when the electric wire 4 swings in a direction perpendicular to the track direction due to strong winds, the hanging insulator 17 and lightning arrester 19 swing in the direction perpendicular to the track while remaining parallel.
The air discharge gap G between the end of the arc horn 24 and the discharge electrode 25 is always kept constant. Also, at this time, the load on the lightning arrester 19 exerts a torsional effect on the mounting bracket and the hanging insulator 17 due to the rotation of the mounting bracket restricted in one direction, that is, the rotation within one plane in the vertical direction. Therefore, deformation of the mounting bracket and the hanging insulator 17 of the present invention is prevented and durability is improved.

By the way, abnormally large current caused by lightning strikes
When the current flows through the air discharge gap G, which is properly maintained between the arc horn 24 and the discharge electrode 25,
It is discharged at the lightning arrester 19 and flows to the support arm 1 of the tower body through a non-linear resistance element built in the lightning arrester 19.
Furthermore, the following current arm that occurs thereafter is blocked by the air discharge gap G and the nonlinear resistance element.

Moreover, this invention can also be implemented as follows.

(1) Connect the suspension link 5 to the support arm 1 of the tower body using U bolts and U clevises.

(2) The means for adjusting the length of the horizontal support arm 7 can be omitted.

Incidentally, there are the following mounting fittings that are similar to the present invention.

As shown in FIG. 5, the mounting brackets are connected to a triangular frame 26, a mounting plate 13 for the lightning arrester 19, and a right-angled clevis link 14 for mounting the suspension insulator 17.
or non-adjustable, as shown in Figure 6.
Similarly, the triangular plate member 27 is configured to be non-adjustable. In order to ensure that the device using the above-mentioned mounting brackets is stably installed on the support arm 1 of each tower body, several types of mounting brackets with triangular shapes deformed according to various loads are prepared in advance. If it is set, it can be selectively used for the load value of the electric wire 4 calculated for each tower body.

Effects of the Invention As described in detail above, the present invention has an excellent effect of being able to adjust the suspension insulator and lightning arrester insulator so that they are installed in a stable state in response to the different electric wire loads for each tower body.

[Brief explanation of drawings]

Fig. 1 is a front view showing the entire device of an embodiment embodying the present invention, Fig. 2 is an enlarged sectional view of the vicinity of the link mechanism, Fig. 3 is an enlarged sectional view taken along the line X--X of Fig. FIG. 4 is a side view showing the operating state of the device, FIGS. 5 and 6 are front views showing another example of a fitting similar to the fitting of the present invention, and FIG. 7 is a plan view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Support arm, 4... Electric wire, 5... Hanging link, 7... Horizontal support arm, 9... Connecting link, 10... Arm piece, 11... Locking bolt, 1
2... Arm piece, 13... Mounting plate, 14... Right angle clevis link, 17... Hanging insulator, 19... Lightning arrester, 23... Suspension clamp, 24... Arc horn, 25... Discharge electrode, C... Clearance, G... Air discharge gap.

Claims (1)

[Scope of Claims] 1. A mounting bracket is rotatably connected to the support arm 1 of the tower body, and a hanging insulator 17 for supporting the electric wire 4 is connected to the mounting bracket and suspended. Similarly, a lightning arrester 19 is suspended and fixed to the mounting bracket, and a discharge electrode on the energized side is extended laterally through the lower brackets 20 and 22 at the lower part of the suspension insulator 17, and the lightning arrester 19 is fixed to the mounting bracket. In a lightning horn insulator device in which a discharge electrode attached to the lower part of the 19 and the discharge electrode on the energizing side are separated by a predetermined aerial discharge gap G, the mounting bracket is attached to a hanging link that is pivoted to each other. 5. A lightning horn insulator device characterized in that the horizontal support arm 7 and the connecting link 9 constitute a triangular link mechanism, and the link mechanism is provided with length adjustment means for at least one link. Insulator mounting bracket. 2. The lightning horn according to claim 1, wherein the link length adjusting means is constituted by a turnbuckle or a pair of arm pieces 10, 12 having a plurality of holes 10a, 12a, and a locking bolt 11. Insulator mounting bracket for insulator equipment. 3. The insulator mounting bracket in the lightning protection horn insulator device according to claim 1, wherein the discharge electrode attached to the lower part of the lightning arrester 19 extends in the line direction and is formed in a semicircular arc shape.