JPS62229725A - Energy storage apparatus of on-load tap changer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an improved energy storage device for an on-load tap changer.

(Prior Art) In general, an on-load tap switching device is required to have a function of rapidly switching a movable contact from a fixed contact connected to odd-numbered taps to a fixed contact connected to even-numbered taps. The fast-acting function of this movable contact is provided by an energy storage device associated with its drive shaft.

An example of a conventional energy storage device is disclosed in Japanese Patent Publication No. 52-47131. This energy storage device is shown in Fig. 6 (A
>, as shown in (B), the winding case 2. Consisting of a combination of a storage case 4 and a storage spring 3, a spring eastward shaft 1 and a storage case guide shaft V are constructed on a mounting plate 9.
It is configured to be inserted through the foot 5 so that it can be moved.

-゛ As can be seen from FIG. 6, in this energy storage device, the rotation of the drive shaft 6 causes the eccentric plate 7 to rotate, and the energy storage spring 3 is stored when the hoisting case 2 moves to the left or right. Forced. When the storage force of this energy storage spring 3 reaches its maximum value, the catch of the energy storage case 4 is released and the energy storage spring 3 is released. Move rapidly to the side. By this movement of the energy storage case 4, the switching crank 12 is rotated to perform a switching operation of a switching switch (not shown).

(Problems to be Solved by the Invention) However, in this conventional energy storage device, there are gaps between the energy storage spring 3 and the guide shaft 1 and between the energy storage case 4 and the guide shaft 5 during energy storage operation. and frictional forces are generated during the release action. This frictional force generates stress in one speech and action part of the two, which may impede the switching operation of the switching switch. Moreover, as capacity increases in the future, the stress that causes this loss will increase, making it impossible for the switching switch to perform switching operations, and there is a risk that material strength will exceed the limit and lead to destruction.

The purpose of the present invention is to extend mechanical life by reducing loss due to frictional force generated in sliding parts during energy storage operation, and improve reliability by ensuring reliable switching of the switching switch. An object of the present invention is to provide an energy storage device for a tap changer on load.

[Structure of the Invention] (Means and Effects for Solving the Problems) The energy storage device of the on-load tap changer according to the present invention guides the hoisting case by receiving the driving force from the drive mechanism of the on-load tap changer. A winding case that freely slides the shaft; and a switching crank that is arranged to freely slide the energy storage case guide shaft facing the winding case and that converts the driving force into switching force for the switching switch. an energy storage case having a power storage case; a power storage spring that is stored between the power storage case and the winding case and has spring receivers at both ends that abut against the power storage case and the winding case, respectively; It is characterized by being composed of a spring guide shaft that passes through the spring and the spring receiver without friction, and has a dimensional relationship such that there is no friction between the hoisting case, the spring, and the spring guide shaft. As a result, it is possible to reduce the loss due to friction during the energy storage operation, extend the mechanical life, and improve the reliability of the switching operation of the switching switch.

(Example) The present invention will be described below with reference to FIGS. 1, 2 and 3A.

Examples shown in B and C will be described. In the energy accumulator according to the present invention, the eccentric plate 7 integrated with the drive shaft 6, which is roughly divided into a combination of the winding case 2, the energy accumulating case 4, and the energy accumulating spring 3, is mounted on the upper part of the hoisting case 2. It is arranged between guides 13.13 on both parallel sides. In addition, there are four wavy protrusions 14a on both sides of the winding case 2.
, 14tl, 14C and 14d are formed,
A winding case guide shaft 10 passes through the projecting pieces 14a and 14d on both sides, and both ends of the guide shaft 10 are pivotally supported by the mounting plate 9 as shown in FIG. 3A.

Spring receivers 8 are provided at both ends of the energy storage spring 3, and the spring receivers 8
A spring guide shaft 1 is inserted into the storage spring 3, and both ends of the spring guide shaft 1 are pivotally supported on a mounting plate 9, with the spring receivers 8 extending through the holes of the projections 14b and 14c. Therefore, in the present invention, the combination of the spring guide shaft 1 and the spring receiver 8 is structured so that they do not come into contact with each other, as shown in FIG. Further, a pulling claw 11, which will be described later, is formed on the side of the winding case 2.

On the other hand, protrusions 15a, 15b, 15c are provided on both sides of the energy storage case 4, and these protrusions 15a, 15b, 15c engage with each other as shown in FIG. A power storage case guide shaft 5 is inserted into the shaft, and both sides thereof are pivotally supported by a mounting plate 9.

Next, the operation of the energy storage device of the on-load tap changer according to the present invention constructed as described above will be explained with reference to FIGS. 3, 4, and 5. In FIG. 3, when the eccentric plate 7 is rotated in the direction of the arrow by a driving force from a drive mechanism (not shown), the hoisting case 2 is displaced in the direction of the arrow A. At this time, since the energy storage case 4 is fixed by a stopper (not shown), the energy storage spring 3 is gradually compressed.

FIG. 4 shows a state in which the hoisting case 2 has been displaced to a position where the amount of compression of the energy storage spring 3 is close to the maximum value. When the hoisting case 2 is displaced from this state to the position where the amount of compression of the energy storage spring 3 is maximum, a catch (not shown) is pulled out by the pulling claw 11 of the hoisting case 2, and the energy storage spring 3 is released. . By releasing the energy storage spring 3, the energy storage case 4 is instantly displaced in the direction of arrow A. At this time, by rotating the switching crank 12 connected to the energy storage case 4, the energy storage release operation at the start of driving the switching switch shown in FIG. 5 is completed.

In the process of this energy storage operation, the winding case 2 and the energy storage spring 3 move the spring guide shaft 1 from the state shown in FIG. 3B to the state shown in FIG. 5B.

However, when the winding case 2 and the energy storage spring 3 slide, the winding case 2. Since the energy storage spring 3 and the spring receiver 8 have a friction-free dimensional relationship with the spring guide shaft 1 as shown in FIG. 2, there is no loss due to friction.
Moreover, the operation can be performed smoothly.

[Effects of the Invention] As described above, according to the present invention, the compression spring is sandwiched and stored between the winding case and the storage case, and the spring guide shaft and the winding case guide shaft are separated and share their functions. , and by maintaining a dimensional relationship in which the winding case and the spring guide shaft do not come into contact with each other, it is possible to reduce loss due to friction of the moving body during energy storage operation, extend mechanical life, and improve switching performance. The switching operation of the switch can be performed reliably.

[Brief explanation of drawings]

Fig. 1 is an exploded view showing an embodiment of the energy storage device of the load tap changer according to the present invention, Fig. 2 is an enlarged view showing the penetrating portion of the spring guide shaft of the winding case, Fig. 3A, B and C are a plan view, a front view, and a side view showing the starting position state of the energy storage device of the present invention during energy storage operation, and FIGS. 4A and B
5A and B are plan views and front views showing the final state of the energy storage operation, and FIGS. 6A and B are the conventional energy storage operation. FIG. 3 is a plan view and a front view of the device. 1... Spring guide shaft 2... Winding case 3... Energy storage spring 4... Energy storage case 5... Energy storage case guide shaft 6... Drive shaft 7... Eccentric plate 8 ...Spring receiver 10...Hoisting case guide shaft 14a to 14d...Protrusion pieces 15a to 15C...Protrusion piece (8γ33) Agent Patent attorney Yoshiaki Inomata (and others)
1 person) 9a 1 Figure〈Nohe Noku ν

Claims (1)

[Claims] (1) A hoisting case that freely slides on the hoisting case guide shaft in response to the driving force from the drive mechanism of the tap changer under load, and a storage case guide shaft that freely slides in opposition to the hoisting case. an energy accumulating case having a switching crank arranged to slide and converting the sliding force into switching force for the switching switch; A tap switching device under load, characterized in that it is comprised of an energy storage spring having a spring receiver that abuts against the energy storage case and the hoisting case, and a spring guide shaft that passes through the energy storage spring and the spring receiver without friction. energy storage device.