JPH036971Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a suspended tension insulator device.

(Prior art) A conventional suspended tension insulator device inserts a suspension mounting bracket and a balance yoke into the tower support point and connects the tension insulator device with pins to both ends of the yoke. If an unbalanced tension occurs in the installed power transmission line, the transmission line installation point will simply move by the tilting length of the balance yoke toward the high tension side, and the effect of damping the unbalanced tension will be small. The severe unbalanced tension that caused wire breakage in one span could even lead to the tower collapsing.

(Problems to be Solved by the Invention) The present invention has been completed with the aim of solving the above-mentioned drawbacks and providing a suspended tension insulator device that has an excellent damping effect on unbalanced tension.

(Means for Solving the Problems) The present invention pivots the lower part of the intermediate member, which normally stands upright, to the lower part of the hanging member suspended from the mounting bracket on the steel tower arm, and the upper part of the intermediate member At the same time, the upper part of the vertical member, which has tension-resistant insulators connected to both ends of the lower side, is pivoted by a shaft pin, and a shear pin that is sheared by a load is inserted in the intermediate position between these shaft pins to form an intermediate member. The vertical members are connected to each other, and the upper ends of the intermediate member and the vertical member are provided along the outer peripheral surfaces of the upper ends to resist opening of both members due to an impulsive unbalanced tension acting on the lower end of the vertical member. It is characterized by the provision of a curved buffer plate.

(Function) Since the suspended tension insulator device of the present invention is connected to both lower ends of the vertical member,
Normally, the vertical members receive balanced tension on both the left and right sides, and the hanging member, intermediate member, and vertical member maintain an overlapping state on a substantially vertical line, but if one of the power transmission lines breaks, the vertical The member is subjected to a large unbalanced tension at its lower end, causing the suspension member to tilt in a direction opposite to the break side and further causing the vertical member to open relative to the intermediate member about the upper axle pin. At this time, when the unbalanced tension acting on the lower end of the vertical member is not large enough to shear the shear pin, the intermediate member and the vertical member maintain an overlapping state. However, when the unbalanced tension is extremely large, the shear pin is sheared and the restraint between the intermediate member and the vertical member is released, and the curved buffer plate provided along the outer circumferential surface of the upper end of the intermediate member and the vertical member Since both members are plastically deformed into a flat plate shape while providing appropriate resistance to the opening of the wire, the shocking unbalanced tension that occurs when the wire breaks is absorbed as energy for the plastic deformation of the buffer plate. The unbalanced tension is greatly alleviated due to the effect of adding the actual length of the transmission line, which is caused by the hanging member, intermediate member, and vertical member extending in a straight line in the tension direction, and accidents such as the collapse of the transmission line tower are reliably prevented. can do.

(Embodiment) The present invention will be described in detail below with reference to the illustrated embodiment. In the figure, 1 is a mounting bracket that is attached to a tower arm of a power transmission line, and 2 is a mounting bracket that connects the mounting bracket 1 to a shaft pin 3.
4 is a bifurcated hanging member suspended with a shaft pin 5 at the lower end of the hanging member 2, and 6 is a normally upright intermediate member whose lower end is pivotally connected to the lower end of the hanging member 2; It is a vertical member in a substantially elongated triangular shape that is inserted between the members 4 and whose upper end is pivotally connected to the upper end of the intermediate member 4 with a shaft pin 7 . At both lower ends of this vertical member 6, shaft pins 8, 8 are provided, and tension-resistant insulator devices 9, 9 are provided.
are symmetrically connected. These intermediate members 4
A buffering plate 10 is provided at the upper end of the vertical member 6 and is formed by bending a metal plate such as a copper plate along the outer peripheral surface of the upper end. The buffer plate 10 is preferably pivoted at its center by a shaft pin 7, and its cross-sectional dimensions are such that the intermediate member 4 and the vertical member 6 will open due to the unbalanced tension generated when one of the power transmission lines is disconnected. When doing so, the dimensions are such that these two members can be plastically deformed into a flat plate shape while providing appropriate resistance to opening. In addition, in the present invention, a shear pin 11 made of steel is provided approximately midway between the shaft pin 5 and the shaft pin 7.
is inserted between the intermediate member 4 and the vertical member 6 to connect the two members. Therefore, when the unbalanced tension acting on the lower end of the vertical member 6 is not large enough to shear the shear pin 11, the intermediate member 4 and the vertical member 6 will maintain an overlapping state.
In the figure, 12 is a lightning-proof arc horn provided at both ends of the tension insulator device 9, and 13 is a tension insulator device 9.
A power transmission line 15 is attached to the tip of the vertical member 6 via a tension clamp 14, and is a guide wall extending from the bottom of the vertical member 6 on both sides to ensure the stability of the intermediate member 4.

In this structure, as shown in FIG. 1, a vertical member 6 whose upper end is pivotally connected to the upper end of the intermediate member 4 normally has a shear pin 11 that connects the two.
A tension-resistant insulator device is maintained in an overlapping state with the intermediate member 4 by a curved buffer plate 10 provided along the outer peripheral surface of the upper end portion, and is connected to both lower end portions of the vertical member 6. 9 applies equal tension to the left and right sides of the lower side of the vertical member 6, the lower end of the hanging member 2 is attached to the lower end of the hanging member 2, which is suspended from the mounting bracket 1 to the tower arm of the power transmission line. The attached intermediate member 4 and vertical member 6 maintain a state in which they overlap on a substantially vertical line. However, for example, if the power transmission line 13 on the left side is disconnected, a very large unbalanced tension acts only on the right side, causing the hanging member 2 to tilt to the right around the shaft pin 3 as shown in FIG. The intermediate member 4 tries to open to the left and the vertical member 6 tries to open to the right, and the resulting shear stress causes the shear pin 11 to open.
is sheared. When the shear pin 11 is sheared in this way, the restraint between the intermediate member 4 and the vertical member 6 is released, and the intermediate member 4 and the vertical member 6 are connected to a curved buffer plate provided along the outer peripheral surface of the upper end thereof. 10 is opened while being plastically deformed, and finally, as shown in FIG. 5, the hanging member 2, intermediate member 4, and vertical member 6 are stabilized in a straight line. In this way, both members open while receiving a moderate amount of resistance, so the impact unbalanced tension is alleviated, and the length of the components of the suspension section is extended by the sum of the lengths of these three members. Since it is added to the actual length of the electric wire, the unbalanced tension is further alleviated, and accidents such as the collapse of transmission line towers are reliably prevented.

(Effect of the invention) As is clear from the above explanation, the present invention can significantly alleviate the shocking unbalanced tension that occurs when a power transmission line is disconnected. The maximum tensile load, which was 9310Kg in the case of 1900Kg, can be attenuated to 1900Kg. Therefore, according to the present invention, accidents such as the collapse of power transmission line towers can be reliably prevented, and its practical value is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a partially cutaway front view of the main part, and Fig.
4 is a partially cutaway front view showing the state immediately after the wire is broken, and FIG. 5 is a partially cutaway front view showing the stable state after the wire is broken. 1: Mounting bracket, 2: Hanging member, 4: Intermediate member,
6: Vertical member, 9: Tension insulator device, 10: Buffer plate.

Claims (1)

[Scope of utility model registration request] The lower part of an intermediate member 4, which normally stands upright, is pivotally attached to the lower part of a hanging member 2 suspended from a mounting bracket 1 to a steel tower arm by a shaft pin 5. The upper part of the vertical member 6 to which the insulator device 9 is connected is pivotally connected by a shaft pin 7, and a shear pin 11 that is sheared by a load is inserted at an intermediate position between the shaft pins 5 and 7 to connect the intermediate member 4. The vertical members 6 are connected to each other, and the upper ends of the intermediate member 4 and the vertical member 6 are designed to resist opening of both members due to an impulsive unbalanced tension acting on the lower end of the vertical member 6. A suspended tension insulator device characterized by being provided with a buffer plate 10 curved along the outer peripheral surface.