JPS6276708A - Slide type no-voltage tap changer - Google Patents

Abstract

PURPOSE:To simplify the construction and to reduce the sizes of a plurality of no-voltage tap changers of the same rated values by providing in parallel the changers and so providing a bevel gear unit to be freely convertible in the direction to a body case. CONSTITUTION:A plurality of stationary contacts 2 are disposed linearly on the stationary supporting frame 21 of a tap changer. A driving plate 4 for moving linearly the contacts in the arraying direction by the rotation of a driving gear 1 is provided, and a movable contact 3 is provided on the plate 4. The gear 1 is secured to a driving shaft, and a driving shaft 5 is supported to a body case 6. A gear case 10 which contains bevel gears 7a, 7b is engaged in an annular groove formed in the case 6. With this structure, when the case 10 is rotated along the groove, the direction of an output shaft 9 coupled with a coupling shaft 8 can be selected to any position of 360 deg.. With the above construction, the number of tap changers can be arbitrarily altered in response to the using capacity to reduce in size. Further, since the changers can be operated by one actuator 22, the construction can be reduced in size.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a slide type non-voltage tap changer that is attached to a transformer.

[Technical Background of the Invention and Problems Therewith] A slide-type voltageless tap changer switches taps by moving along the straight line using a tap winding.

In a conventional device of this kind, a long drive plate having a gear groove is moved in a straight line by a drive iFl1m wheel that meshes with the gear groove, so that a movable contact attached to the drive plate selects a fixed contact. It is composed of The no-voltage tap changer is installed within the transformer tank to ensure the necessary insulation distance, so its installation direction and position may vary.

The voltageless tap changer is operated via a connecting shaft by a manual operating device provided on the outer wall of the transformer tank or on the top of the tank cover. In order to expand the applicable market, multiple non-voltage tap changers may be installed, and multiple manual operating devices may be required to accommodate them, which requires a large amount of space inside and outside the transformer tank. . Furthermore, the operating directions of the manual operating device and the connecting shaft do not match, and the direction must be changed by approximately 90 degrees, resulting in a complex structure that becomes even more complex as the number of words increases.

[Object of the Invention] In view of the above-mentioned points, an object of the present invention is to provide a slide type non-voltage tap changer that has a simple structure, is miniaturized, and operates reliably even when the capacity is increased.

[Summary of the Invention] In order to achieve the above objects, the present invention provides the same rating according to the applied capacity. ! Several voltageless tap changers are installed in parallel and driven by a common drive shaft, and the bevel gear device interposed between the drive shaft and the operating mechanism is connected to the main body case by a holding plate. It is characterized by being fixed so that its direction can be changed freely.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings.
Therefore, in FIGS. 1 to 13, 1 is a drive gear, 2 is a plurality of fixed contacts linearly arranged at a predetermined distance on the fixed support frame 21 of the tap changer, and 4 is the drive gear 1. It is a long drive plate that has gear grooves 41 that mesh with each other and moves linearly along the arrangement direction of fixed contacts 2 as the drive gear 1 rotates, and has movable contacts 3 that selectively contact the fixed contacts 2. There is.

The drive gear 1 is fixed to a drive shaft 5, and the drive shaft 5 is supported by a main body case 6. A bevel gear 7 is attached to the end of the drive shaft 5.
a is fixed, and is connected to the manual operation device 22 through another bevel gear 7b meshing with it, a connecting shaft 8, and an outlet shaft 9, with the driving direction thereof being changed approximately at right angles. The output shaft 9 is fixed to a cylindrical gear 10, and the gear case 10 is fitted into an annular groove 11 formed in the main body case 6. Further, the outer periphery of the gear case 10 has an annular flange 12, which is held down by an annular two-split retaining ring 13 and fixed to the main body case 6 with bolts 24. A plurality of voltageless tap changers having such a configuration are arranged in parallel according to their capacities and are connected and fixed by a long fixed support column 14 and a flange 15 through which a common drive shaft 5 passes.

Further, a blind plate 16 is attached to the side of the drive shaft 5 that does not have a gear case.

According to the voltageless tap changer of the present invention configured as described above, when the gear case 10 is rotated along the annular groove 71 provided in the main body case 6, the direction of the outlet shaft 9 connected to the connecting shaft 8 can be changed. can be selected at any position in 360 degrees, and can be freely and accurately mounted in any mounting position and mounting direction. In addition, even in the case of non-voltage tap changers installed in parallel, the parts to which the gear case 10 of the main body case 6, the spacer 7 lange 5, and the blind plate 16 are attached have the same structure, so the number of units used can be adjusted arbitrarily depending on the capacity used. It can be changed and made smaller by eliminating unnecessary space. Moreover, a single manual operating device 22 can operate these multiple non-voltage tap changers installed in parallel.
Since the bevel gears 7a and 7b can be operated via one drive shaft 5 (C), they are more compact.

Further, in the present invention, if a bevel gear in which the drive shaft 5 extends to both sides of the gear case 10 as shown in FIG. 4 is used, the space for ten gear cases can be reduced, and the device can be made more compact.

[Effect of the Invention J As described above, according to the present invention, the operating mechanism drives the drive shaft via the bevel gear, and the drive gear fixed to the drive shaft slides the drive plate to switch the tap. In a device, a plurality of voltageless tap changers with the same rating are installed in parallel according to the applied capacity, and they are driven by a common drive shaft, and furthermore, a Since the direction of the bevel gear device can be freely changed with respect to the main body case using a holding plate,
It is possible to obtain a slide type non-voltage tap changer that has a simple configuration, is miniaturized, and operates reliably even with increased capacity.

[Brief explanation of drawings]

1st? FIG. 2 is a front view showing an example of the present invention, (a) is a front view, (b) is a plan view, and FIG.
This figure is also a sectional view of the main part, and FIG. 4 is a sectional view showing an example of the actual song of the present invention. DESCRIPTION OF SYMBOLS 1... Drive gear, 2... Fixed contact, 3... Movable contact, 4... Drive plate, 5... Drive shaft, 6... Main body case, 7a, 7b... Rectangular gear , 8... connection shaft, 9
... Output shaft, 10 ... Gear case, 12 ... Flange, 13 ... Holding ring. Applicant's representative Patent attorney Takehiko Suzue 510 2nd grade 4th question

Claims (1)

[Claims] a plurality of fixed contacts linearly arranged at a predetermined distance; a movable contact selectively contacting the fixed contacts;
A drive plate having a gear groove that moves this movable contact linearly along a fixed contact, a drive gear that engages with and drives the gear groove of this drive plate, and a drive shaft fixed to this drive gear. , a sliding type non-voltage tap changer consisting of a main body case that holds these, an operating device connected to the end of the drive shaft via a bevel gear, and a gear case that supports the bevel gear. Accordingly, a plurality of the voltageless tap changers are arranged in parallel and driven by a common drive shaft, and the gear case is fixed to the main body case by a holding plate so that its direction can be changed. Non-voltage tap changer.