JPH0684432A - Horizontal-break switch - Google Patents

Abstract

PURPOSE:To decrease the number of component parts of a horizontal-break switch so as to facilitate the assembling work for the switch by providing a vertically pointing groove in the outer periphery of a support cylinder portion to which a movable electrode is mounted, and causing a drive arm to have its protrusion locked into the groove. CONSTITUTION:A pair of fixed electrodes for each phase are disposed opposite to each other, and a movable electrode 14 is provided which is connected to and disconnected from one of the fixed electrodes for making and breaking action and which is slidable against the other fixed electrode, and a support cylinder portion A is provided which covers the outer periphery of the electrode 14 and moves the electrode 14 to make or break the circuit. A groove 31 pointing in the vertical direction is provided in the outer periphery of the support cylinder portion A, and an arm for driving the movable electrode for making and breaking action, comprising a pair of drive arm pieces 42, is so disposed to hold the groove 31 from both sides. A protrusion 43 protruding to the inside of each arm piece 42 is locked in the groove 31. Since the protrusion 43 of each arm piece 42 is being locked in the groove 31 of the support cylinder portion A, when the arm 42 is operated in either the opening or closing direction the support cylinder portion A is driven so that the movable electrode 14 is moved in either the opening or closing direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention blows a gas against an arc generated between a fixed electrode and a movable electrode when a switch is opened, and actively extends the arc and finally blows it away. The present invention relates to a horizontal cut type switch such as a puffer type that is configured to extinguish an arc.

[0002]

2. Description of the Related Art Conventionally, a puffer type switch has been known as a horizontal cut-type switch, but this type of electrode corresponds to a pair of fixed electrodes facing each other and one of the fixed electrodes can be contacted and separated. Then, the movable electrode is configured to perform an opening / closing operation, and a drive mechanism that causes the movable electrode to perform an opening / closing operation. The drive mechanism and the movable electrode are connected to a support cylinder mounted so as to house the movable electrode so that the tip of a drive arm fixed to a drive shaft forming a part of the drive mechanism is rotatably attached. Or went through a link member.

[0003]

Therefore, the structure is complicated, the number of constituent parts is increased, and the assembling work is troublesome.

The present invention has been made in view of the above problems, and provides a horizontal cut-type switch which can reduce the number of constituent parts, facilitate the assembling work, and reduce the manufacturing cost. To do.

[0005]

In the horizontal cut-type switch of the present invention, a pair of fixed electrodes for each phase are arranged so as to face each other, and one fixed electrode operates as a contact / separation opening / closing path and the other fixed electrode. A movable electrode that is slidable with respect to the electrode is provided, a supporting cylinder portion that covers the outer periphery of the movable electrode and opens and closes the movable electrode is provided, and a groove that faces in the vertical direction is formed on the outer periphery of the supporting cylinder portion. Then, a movable electrode opening / closing drive arm composed of a pair of drive arm pieces is arranged so as to sandwich the groove from both sides, and a projection protruding inside the drive arm piece is engaged with the groove. .

[0006]

With the above construction, when the drive arm is operated in the opening / closing direction, the projection of the drive arm piece is engaged with the groove of the supporting tubular portion, so that the supporting tubular portion is driven and the movable electrode moves in the opening / closing direction.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a puffer type switch embodying the present invention will be described below with reference to FIGS.

In the figure, reference numeral 1 is a gas-containing switch case in which an arc-extinguishing gas such as SF6 is sealed, and reference numerals 2 and 3 are bushings fixed to the right and left side walls of the switch case 1 corresponding to the respective phases. A conductive rod 5 having one end crimped to the lead wire 4 is inserted into and fixed to the bushings 2 and 3, and a connection fitting 6 is tightened inside the conductive rod 5. Reference numeral 7 denotes a tubular locking flange formed on the outer periphery of the connection fitting 6, which is externally fitted to the inner ends of the bushings 2 and 3 via a restriction ring 8 and an O-ring 9.

A fixed electrode 10 is attached by screwing to the inner surface of the connecting fitting 6 of the bushing 2, and a nut 11 screwed to the outer periphery of the base end is fixed via a spring washer 11a. It is firmly fixed by tightening. In the fixed electrode 10, a guide hole 10a having a tip open is formed in the axial direction, and a through hole 10b communicating with the outside is formed at the base end portion of the guide hole 10a. The extinguished gas introduced is fixed electrode 10
It is designed to be discharged to the outside.

Reference numeral 12 is a rod-shaped fixed electrode attached to the inner end surface of the connecting fitting 6 of the bushing 3 by screwing. The fixed electrode 12 has the same outer diameter as that of the fixed electrode 10 and has a long length.

The nut 13 and the spring washer 13a are fixed to the fixed electrode 12 like the nut 11 and the spring washer 11a.
The fixed electrode 12 is firmly screwed to the connecting fitting 6 by being screwed to the base end portion of.

Reference numeral 14 denotes a movable electrode which is slidably provided on the outer circumference of the fixed electrode 12 along the axial direction. In the movable electrode 14, a contactor 15 formed by dividing a conductive cylindrical body into four in the longitudinal direction is arranged so as to cover the outer circumference of the fixed electrode 12, and the outer circumferences at both ends thereof form a pair of garter springs 1.
It is configured by bundling with Nos. 6 and 17. The garter spring 16 at the tip is covered with an arc-resistant tube 18 made of Teflon or the like.

Reference numerals 19 and 20 denote contact portions projecting from the inner peripheral surfaces of both ends of the contactor 15, which can be slidably contacted with the outer periphery of the fixed electrode 12, and the contact portions 19 on the tip side face each other. Sliding contact is also possible with the fixed electrode 10. Two
Reference numeral 1 denotes a restriction ring fitted to the inner peripheral surface of each contactor 15, which restricts the inner diameter of the movable electrode 14.

Reference numeral 22 designates a jaw portion which projects outward from the outer periphery of the central portion of the contactor 15. Reference numeral 23 denotes the jaw 2 of the contactor 15.
2 is a ring-shaped restricting member as a spacer arranged loosely in an attachment hole 23a formed in the center of the outer periphery of the attachment 2, and is formed of an insulating synthetic resin and has a depth of the attachment hole 23a. Is formed to be slightly longer than the length of the jaw 22 in the left-right direction (in FIG. 1), and the inner diameter thereof is formed to be larger than the outer diameter of the jaw 2 of the movable electrode 14. Further, the outer peripheral surfaces on both sides of the regulating member 23 are cut off in the vertical direction to provide flat portions 23b. Reference numeral 24 denotes a bolt insertion hole that is transparently provided at a position in the cross direction around the mounting hole 23a of the regulation member 23, and 25 is a gas communication hole formed in an arc shape so as to be located between the bolt insertion holes 24. . Reference numerals 26 and 27 are support cylinders that form a support cylinder portion A together with the restriction member 23. The support cylinders 26 and 27 are arranged in a clinging manner with respect to both ends of the restriction member 23, and are made of vinylon or tetron having excellent gas resistance. It is formed into a cylinder with a bottom and made of fiber reinforced plastics. The support cylinders 26 and 27 have an insertion hole 26 formed at the center of the bottom thereof.
a and 27a, the bolt insertion holes 28 and 29 and the regulation member 2 are loosely inserted into the movable electrode 14 and are formed at the bottom of the bolt insertion hole 24 of the regulation member 23.
The bolt 30 is inserted through the bolt insertion hole 24 of No. 3, and the nut 30 a is connected to each other by being tightened at the tip of the bolt 30.

That is, the support cylinders 26 and 27 are provided with the restricting member 23 to form a fitting groove 44 in which the jaw portion 22 of the movable electrode 14 is movably fitted, so that the movable electrode 22 has a diametrical direction. The movement in the axial direction (the horizontal direction in FIG. 1) is possible. Further, the groove formed by being surrounded by the flat surface portion 23b of the regulating member 23 and the support cylinders 26 and 27 is a groove 31 oriented in the vertical direction.

Numerals 32 and 33 are gas communication holes formed in the bottom of the support cylinders 26 and 27 in an arc shape so as to correspond to the gas communication holes 25 of the restriction member 23. Reference numeral 34 is a mounting groove formed so as to circulate with respect to the inner circumference of the support cylinder 27.

Reference numeral 35 denotes a bellows, one end of which is attached airtightly to a mounting groove 6a provided on the outer periphery of the connection fitting 6 by a tightening band 36, and the other end of which is the support cylinder 27.
Similarly, a tightening band 37 is attached to the mounting groove 34 in the airtight manner. The bellows 35 is an aromatic polyamide fiber (in this example, manufactured by Teijin Ltd .; trade name "CONEX") or Provan processed surface (Kurashiki spinning) (Made by corporation). C is a pressure chamber surrounded by the bellows 35, the bushing 3, and the support cylinder 27.

Reference numeral 38 denotes a truncated cone-shaped orifice cone screwed into the tip portion of the support cylinder 26, which is made of a synthetic resin having excellent arc resistance and insulating properties. The orifice cone 38 is prevented from rotating by a set screw 39 screwed from the outer periphery of the support cylinder 26. Reference numeral 40 denotes a nozzle provided at the tip of the orifice cone 38, which is formed so as to be engageable with the fixed electrode 10.

Reference numeral 41 denotes a drive shaft rotatably supported at a position below the fixed electrode 12 so as to open and close so as to extend over each phase in the switch case 1, and can be operated externally by a manual operation groove (not shown). There is. Reference numeral 42 denotes a pair of drive arm pieces whose base ends are bolted to the same drive shaft 41 for each phase, and the regulating member 23, the support tube 26, It is engaged with a groove 31 formed by 27 and directed in the vertical direction so as to be slightly movable.

The drive arm piece 42 constitutes a movable electrode opening / closing drive arm. Next, the operation of the puffer type switch configured as described above will be described. Figure 1
Indicates an open state, and when the drive shaft 41 is rotated in the closing direction by an external operation, the drive arm piece 42 is rotated in the same direction, and thereby the drive arm piece 42 is loosely fitted in the fitting groove 44 of the support tubular portion A. The movable electrode 14, the bellows 35, and the orifice cone 38 are also integrally moved in the closing direction, and the movable electrode 14 is inserted into contact with the fixed electrode 10 to be in a closed state as shown by a chain line in FIG. At this time, as shown in FIG. 1, the bellows 35 in the contracted state is stretched along with the movement in the closing direction, and the internal pressure in the pressure chamber C decreases, so that the gas in the switch case 1 is discharged from the nozzle. 40 and gas communication hole 25,
It is sucked into the bellows 35 through 32 and 33.

When the drive arm piece 42 is rotated in the open direction via the operating shaft 41 from the closed state shown by the chain line in FIG. 1 by an external operation, the regulating member 23 linked to the drive arm piece 42, the support tube 26, 27, the movable electrode 14, and the bellows 35 are integrally moved in the opening direction. And
When the movable electrode 14 is separated from the fixed electrode 10, the same electrode 1
An arc is generated between the tip portions of 0 and 14. Therefore, the bellows 35 is reduced as shown by the solid line in FIG. 1, and the internal pressure in the pressure chamber C rises. It is ejected to the outside through the communicating holes 25, 32, 33 and the nozzle 40 of the orifice cone 38, and is vigorously blown against the arc generated between the electrodes 10, 14. Therefore, the arc generated when the circuit is opened is expanded by the gas ejected from the inside of the bellows 35, and finally blown off and efficiently extinguished.

According to the present invention, it suffices to fit the connecting projection 43 at the tip of the drive arm piece 42 provided on the drive shaft 41 into the vertically oriented groove 31 provided on the outer periphery of the support tubular portion A. Therefore, unlike the prior art, it is not necessary to pivotally mount the drive arm piece 42 with respect to the support cylinder portion A. Therefore, the assembling work can be performed easily and the number of parts can be reduced.

In this embodiment, the movable electrode 14 is fitted in the fitting groove 44 of the support cylindrical portion A so that it can move freely, even if the fixed electrodes 10 and 12 arranged opposite to each other are arranged with their centers displaced from each other. Since the movable electrode 14 is movable in the axial direction and the radial direction, the movable electrode 14 tilts and slides when the movable electrode 14 contacts the fixed electrode 9. Can be turned on.

Further, the support cylinder portion A can be assembled by arranging the support cylinders 26 and 27 in a clamped manner with respect to the regulating member 23 and tightening the bolts 30, so that the assembly can be carried out easily. Further, since the movable electrode 14 is entirely covered by the support cylinder portion A, the withstand voltage between the ground and the different phases becomes excellent.

The present invention is not limited to the above-mentioned embodiment, and it is sufficient that the grooves facing in the vertical direction are provided at least on both sides of the supporting tubular portion, and the point is that the projection of the drive arm piece is engaged. Any shape may be used as long as the support cylinder is driven.

It is also obvious that the pair of drive arm pieces may be formed integrally with each other or may be formed separately, and that the operation of the present invention can be carried out without any trouble.

[0027]

As described in detail above, according to the present invention, a groove is formed which is oriented in the vertical direction with respect to the outer periphery of the support cylindrical portion in which the movable electrode is mounted, and the protrusion of the drive arm is inserted into the groove which is oriented in the vertical direction. With the simple structure, the number of components can be reduced, and the assembling work can be easily performed, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a switch according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a supporting cylinder portion of the same.

FIG. 3 is a cross-sectional view of a supporting cylinder portion of the same.

[Explanation of symbols]

1 ... Switch case, 2,3 ... Bushing, 10,12 ...
Fixed electrode, 14 ... Movable electrode, 26, 27 ... Support tube, 31
... vertical grooves, 41 ... drive shaft, 42 ... drive arm piece, 43 ... linking protrusion, A ... support cylinder.

Claims (1)

[Claims] 1. A pair of fixed electrodes for each phase are arranged so as to face each other, and a movable electrode is provided which is movable toward and away from one fixed electrode and is slidable to the other fixed electrode. Provided,
A support cylinder is provided to cover the outer periphery of the movable electrode and to open and close the movable electrode. A groove is formed on the outer periphery of the support cylinder in the vertical direction. A pair of drive arm pieces are provided so as to sandwich the groove from both sides. A horizontal cut-type switch, characterized in that a movable electrode opening / closing drive arm consisting of the above is disposed, and a projection protruding inside the respective drive arm pieces is inserted into the groove.