JPH10228846A - Arc extinguishing device of gas filled switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arc extinguishing device of a gas filled switch which can reliably and smoothly move an arc generated at the time of opening operation and can easily be manufactured. SOLUTION: An arc runner 4 is installed approximately along the opening direction of a movable contactor 2 which carries out rotational movement at the time of ON and OFF operation and an arc guiding plate 5 made of a conductor is extended from the arc runner 4 to a fixed contractor 1, so that an arc generated at the time of opening operation of the movable contactor 2 can be moved to the arc runner 4 through the arc guiding plate 5 and the arc can reliably and smoothly be extinguished. Especially, since the arc guiding plate 5 and the arc runner 4 are unitedly installed in a fixed contactor 1 side in a prescribed positioning relation, the relative positioning relations and gap adjustment between the movable contactor 2 and the arc guiding plate 5 and between the movable contactor 2 and the arc runner 4 can definitely be specified only by considering the positioning relation of the movable contactor 2 to the fixed contactor 1 at the time of manufacturing and consequently, the device itself can easily be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc extinguishing device for a gas switch which extinguishes an arc generated by an opening operation in which a movable contact is opened from a fixed contact. The present invention relates to an arc extinguishing device for a gas switch to be shifted.

[0002]

2. Description of the Related Art A conventional arc extinguishing device for a gas switch is disclosed in Japanese Utility Model Laid-Open No. 5-75931, which is shown in FIG. FIG. 6 shows a sectional view of a conventional arc extinguishing device for a gas switch.

Referring to FIG. 1, an arc extinguishing device for a gas switch includes a fixed contact 100 formed at a lower end of a fixed conductor 110 and a movable contact 200 at the upper end of a movable conductor 210 which comes into contact with and separates from the fixed contact 100. To form both contacts 100, 2
00, a driving coil 3 and an arc runner 4 for rotating and extinguishing an arc generated at the time of the opening operation for separating the 00 are arranged;
Both contacts 100 and 20 when a part of movable conductor 210 is opened
It is a parallel portion 220 substantially parallel to the arc between zero. A main fixed contact 101 is formed at the lower end of the fixed conductor 110 at the end of a stepped extending portion, and the main movable contact 2 is located below the parallel portion 220 of the movable conductor 210.
01 is formed. The main movable contact 201 and the main fixed contact 101 are configured to be connected at the time of closing.

According to the above-described configuration, at the time of separation, a current in a direction opposite to the arc current is applied to a parallel portion of the movable conductor 210 substantially parallel to an arc generated between the movable contact 200 and the fixed contact 100. Since the current flows, an upward electromagnetic repulsion acts on the arc under the influence of the magnetic field due to the current, and the arc moves upward by the electromagnetic repulsion together with the levitation force of the arc itself, and quickly moves to the arc runner 4.

[0005]

Since the conventional arc extinguishing device for a gas switch is constructed as described above, upward repulsion is caused by the levitation force of the arc itself and the magnetic field generated by the current flowing through the parallel portion 220. The arc is transferred to the arc runner 4 by the force, and the lift of the arc itself and the upward repulsion by the magnetic field are both uncertainly generated. Therefore, the movement of the arc to the arc runner 4 cannot be reliably and smoothly transferred. Had issues. Further, in the conventional device, the arc is transferred to the arc runner 4 by using the levitation force of the arc itself. Therefore, the arc runner 4 and the drive coil 3 must be disposed above the movable contact 200, and the There is a problem in that the arrangement of each member is limited in an extremely narrow closed container having a switch, which limits the degree of freedom in designing the device and makes it difficult to manufacture the device itself.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an arc extinguishing device for a gas switch which can surely and smoothly transfer an arc generated during an opening operation to an arc runner and can easily manufacture the device itself. The purpose is to provide.

[0007]

An arc extinguishing device for a gas switch according to the present invention is configured such that a movable contact is opened and closed with respect to a fixed contact housed in a switch filled with an insulating gas. A gas switch for opening / closing a distribution line, wherein a drive coil and an arc runner are disposed near the fixed contact, and an arc is generated when the movable contact is opened from the fixed contact. In an arc extinguishing device for a gas switch for moving and extinguishing on an arc runner in a direction orthogonal to a magnetic field generated by a current induced in a coil, the movable device is provided around a pivot point disposed at a position facing the fixed contact. A contact is rotatably supported, and the arc runner is disposed substantially along a direction in which the movable contact rotates and opens, and an end of the arc runner on the fixed contact side faces the fixed contact. The arc guide plate formed of a conductive those for extend. Thus, in the present invention,
By disposing an arc runner substantially along the opening direction of the movable contact that makes a rotational movement during the closing / opening operation, and extending an electrically conductive arc guide plate from the arc runner toward the fixed contact. By guiding the arc generated at the time of the opening operation of the movable contact to the arc runner via the arc guide plate, the arc can be surely and smoothly extinguished. In particular, since the arc guide plate and the arc runner are disposed integrally on the fixed contact side in a predetermined positional relationship, the movable member can be manufactured only by considering the positional relationship of the movable contact facing the fixed contact. The relative position and gap adjustment between the contact, the arc guide plate and the arc runner are uniquely specified, so that the device itself can be easily manufactured.

In the arc extinguishing device for a gas switch according to the present invention, when the movable contact is completely opened, the arc extinguishing device is disposed on an imaginary line connecting the center of the driving coil and / or the arc runner and the pivot of the movable contact. The tip of the movable contact is positioned so as to substantially match. As described above, in the present invention, the tip of the movable contact at the time of full opening is positioned so as to substantially coincide with an imaginary line connecting the rotation fulcrum of the movable contact performing the rotational movement and the center of the arc runner or the like. As a result, rapid cooling can be performed by high-speed rotation of the arc after shifting to the arc runner, and higher-speed and smooth arc extinguishing can be performed.

Further, in the arc extinguishing device for a gas switch according to the present invention, the movable contact is formed of two plate-like bodies parallel to the movable direction, and the arc guide plate is formed of two open contacts. Are disposed at predetermined intervals in the middle of the plate-like member. As described above, in the present invention, the arc generated between the fixed contact and the movable contact is formed by disposing the arc guide plate at the middle of the movable contact formed by the two plate-like members. It can be guided to the arc guide plate more reliably.

In the arc extinguishing device for a gas switch according to the present invention, the arc guide plate is formed of a magnetic material having a concave groove-shaped gap that passes when the movable contact rotates. . As described above, in the present invention, the arc guide plate is formed of a magnetic material having a groove-shaped gap, and the movable contact is rotated through the groove-shaped gap so as to pass therethrough.
The arc can be forcibly guided to the arc guide plate by the magnetic flux concentrated on the arc guide plate, and the cutoff of the arc extinguishing device can be stably improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment of the Present Invention) Hereinafter, an arc extinguishing device for a gas switch according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view of an arc extinguishing device for a gas switch according to the present embodiment, in which a main part is cut away, and FIG. 2 is a sectional view taken along line AA of FIG.

In each of the drawings, the arc extinguishing device for a gas switch according to the present embodiment is a closed container 1 filled with an insulating gas.
1. A gas switch in which a fixed contact 1 fixed and supported in a housing 0 and a movable contact 2 rotatably supported are housed, in which the movable contact 1 is turned and opened. A drive coil 3 and an arc runner 4 are disposed substantially along the direction of the arrow. An arc guide plate 5 formed of a conductive material from the end of the arc runner 4 on the side of the fixed contact 1 toward the fixed contact 1.
Is extended.

The fixed contact 1 is formed of a columnar conductive material, and is provided on the inner side wall of the closed container 10 with a power source side bushing 1.
A column-shaped base is fixedly provided on the fixed conductor 11 supported via the base 2. The movable contact 2 is formed of two conductive plate members parallel to the rotation direction, and the base of the plate member is fixed to a rotation support shaft 22.
Are connected to a main shaft 63 via link arms 61 and 62, and rotate in the direction of the arrow A shown in the figure with the rotation of the main shaft 63 in the direction of the arrow B in the diagram. The loading structure of the movable contact 2 with respect to the fixed contact 1 is such that the two conductive plate-like members of the movable contact 2 are pulled mutually by a spring (not shown), This is a configuration for clamping the fixed contact 1. The drive mechanism 6 is composed of the link arms 61 and 62 and the main shaft 63. The movable contact 2 has a link arm 61 supported by a support pin 61a. Are supported by support pins 62a, and a main shaft 63 is coaxially fixed to the link arm 62.

The drive coil 3 includes a mounting plate 31 formed of a conductive material supported at one end by the fixed conductor 11,
A coil bobbin 32 screwed to the other end by a screw 34 made of a magnetic material, and a winding 33 wound around the outer periphery of the coil bobbin 32 and having one end electrically connected to the mounting plate 31. is there. The mounting plate 31 is formed by bending a predetermined angle from the mounting surface of the fixed conductor 11, and the predetermined angle is formed in a direction along the rotation locus of the movable contact 2. A screw 34 of the magnetic material projects through the coil bobbin 32 in a penetrating state.
4, an insulator cap 35 is screwed.

The arc runner 4 is formed of a substantially disk-shaped conductive material, and is screwed with a screw 4a so as to cover the outer periphery of the front side of the drive coil 3, and the other end of the winding 33 is electrically connected. It is a configuration to be connected to. The arc guide plate 5 has one end of a plate made of a conductive material integrally fixed to the outer periphery of the arc runner 4, and the other end of the plate is used to rotate the movable contact 2. It is configured to extend to the vicinity of the fixed contact 1 so as to gradually approach the trajectory. On both sides of the other end of the arc guide plate 5, a pair of hook-shaped notches 5a are formed, and a protrusion 5 protruding between the pair of notches 5a is formed.
b is formed. The pair of cutouts 5 a are movable contactors 2.
When the two plate-like members rotate, they act as a rotation path.

Next, the arc extinguishing operation of the arc extinguishing device for a gas switch according to the present embodiment based on the above configuration will be described. First, when the gas switch is in the closed state, the fixed contact 1 and the movable contact 2 are closed to energize the distribution line. When switching from the closed state to the open state, the main shaft 63 is rotated by operating an operation handle (not shown) provided on the outside of the closed container 10, and the movable contactor is rotated with the rotation of the main shaft 63. 2 is rotated in the direction of arrow A in the figure.

When the movable contact 2 starts rotating, an arc is generated by releasing the fixed contact 1 from the fixed contact 1. The distance between the movable contact 2 and the fixed contact 1 is determined by the distance between the movable contact 2 and the arc guide plate. When each of the gaps G 1, G 2, G 3 is larger than 5, the arc generated between the fixed contact 2 and the fixed contact 2 is guided to the arc guide plate 5. The arc guided to the arc guide plate 5 is bent so as to be gradually separated from the rotation locus (indicated by a dashed line) as the movable contact 2 rotates in the direction of arrow A. It is guided on the guide plate 5 in the direction of the arc runner 4. When the arc is guided onto the arc runner 4, the movable contact 2
Are rotated so as to gradually separate from the arc guide plate 5, so that the arc discharge distance is increased while reliably guiding the arc on the arc guide plate 5.

When an arc is generated with the arc guide plate 5, an arc current flows through the winding 33 of the drive coil 3 to excite the coil bobbin 32, and an electromagnetic force based on Fleming's left-hand rule is applied to the arc runner 4 on the arc runner 4. Will be generated. The electromagnetic force on the arc runner 4 gives a rotating force to the arc that is guided and transferred on the arc runner 4, and the arc is rotated at a high speed by the arc runner 4 to be rapidly cooled and extinguished in an insulating gas atmosphere.

Incidentally, the movable contact 2 in the above embodiment is used.
The rotation stop position at the time of the fully open state can be configured as shown in FIG. The tip Q of the movable contact 2 in this case is
It is configured to be substantially coincident with an imaginary line (indicated by a two-dot chain line in FIG. 3) connecting the center P of the drive coil 3 and the arc runner 4 to the pivot 22 of the movable contact 2. In this way, the rotation stop position of the movable contact 2 is in a state where the tip end Q of the movable contact 2 is located closest to the center P of the arc runner 4, so that the high-speed rotation of the arc on the arc runner 4 can be performed more reliably and smoothly. Can be performed.

(Second Embodiment of the Present Invention) FIG. 4 is a side view of an arc extinguishing device for a gas switch according to a second embodiment of the present invention, in which an essential part is cut away, and FIG. It is a B sectional view. In FIGS. 4 and 5, the arc extinguishing device for a gas switch according to the present embodiment is the same as the first extinguishing device shown in FIGS.
As in the embodiment, the drive coil 3 and the arc runner 4 and the arc guide plate 5 are provided in common, and the configuration of the arc guide plate 5 is different.

The arc guide plate 5 is formed of a substantially U-shaped magnetic material. The U-shaped central base portion is fixed to the fixed contact 1 side on the arc runner 4 and has a U-shaped shape. An auxiliary guide portion 52 for projecting the two protruding pieces toward the movable contact 2 and a substantially L-shaped magnetic body.
The main guiding portion 51 is configured such that the U-shaped base portion is superimposed and assembled on the U-shaped central base portion of the auxiliary guiding portion 52. The arc guide plate 5 is formed of a substantially U-shaped magnetic material having two concave groove-shaped gaps 61 and 62 by a main guide part 51 and an auxiliary guide part 52.
2 constitutes an area through which the movable contact 2 formed in a two-plate state passes.

Next, an arc extinguishing operation of the arc extinguishing device for a gas switch according to the present embodiment based on the above configuration will be described. First, when the gas switch in the input state is switched to the open state, an arc is generated between the fixed contactor 1 and the movable contactor 2 as in the first embodiment, and this arc is induced by arc induction. Guide to plate 5. When an arc is guided to the arc guide plate and an arc is generated between the arc guide plate 5 and the movable contact 2, a magnetic flux generated by the arc discharge current causes a main guide part 51 and an auxiliary guide part 52 made of a magnetic material to be formed. Becomes a magnetic flux distribution concentrated on a substantially U-shaped magnetic body formed by
Also, the U-shaped open portion acts as a magnetic resistance, resulting in a magnetic flux distribution in which the magnetic flux diverges.

The two gaps 6 in the two substantially U-shaped magnetic bodies formed by the main guide portion 51 and the auxiliary guide portion 52
When the movable contact 2 composed of two plate-like bodies passes through the first and the 62, a "dense" portion and a "sparse" portion of the magnetic flux distribution are formed in the substantially U-shaped magnetic body. Becomes Since the two substantially U-shaped magnetic materials act as a grid, the arc induced in the portion where the magnetic flux distribution is “dense” can be forcibly shifted to the arc runner 4 side, and the breaking performance is more stable. Can be improved.

In each of the above embodiments, the fixed contact 1 is formed in a columnar shape and the movable contact 2 is formed as two plate-shaped members. However, the fixed contact 1 and the movable contact 2 are formed.
However, the present invention can also be applied to a case where a butt contact configuration is used in which the butt contact is made. Further, the arc guide plate 5 of the gas switch arc extinguishing device according to the second embodiment is formed of a magnetic material, but the arc of the gas switch arc extinguishing device according to the first embodiment is formed. The guide plate 5 can also be formed of a magnetic material, and the arc can be more quickly guided to the arc runner to improve the breaking performance.

In each of the above embodiments, the driving coil 3 and the arc runner 4 are disposed below the fixed contact 1 and the arc guide plate 5 is mounted between them. As long as it is positioned in the direction of rotation of the movable contact 2 that rotates close to and away from the fixed contact 1, the arc guide plate 5 may be mounted above or beside the fixed contact 1 and mounted therebetween. . Even when the drive coil 3 and the arc runner 4 are arranged above the fixed contact 1, for example,
The levitation force of the arc itself is forcibly suppressed by the guiding action of the arc guiding plate 5, and the arc can be reliably and smoothly guided to the arc runner 4 side. Thus, the driving coil 3
In addition, since the arrangement position of the arc runner 4 is not limited to a specific direction, the arrangement position of each member can be arbitrarily selected, so that the degree of freedom of the device design is widened and the manufacture of the device itself can be facilitated.

[0026]

As described above, according to the present invention,
An arc runner is disposed substantially along the opening direction of the movable contact that performs a rotating motion during the opening operation, and an arc guide plate formed of a conductive material is extended from the arc runner toward the fixed contact to move the movable contact. The arc generated at the time of the contact opening operation can be moved to the arc runner via the arc guide plate, so that the arc can be surely and smoothly extinguished. In particular, since the arc guide plate and the arc runner are disposed integrally on the fixed contact side in a predetermined positional relationship, the movable member can be manufactured only by considering the positional relationship of the movable contact facing the fixed contact. The relative position and gap adjustment between the contact, the arc guide plate, and the arc runner are uniquely specified, and the device itself can be easily manufactured. Further, in the present invention, the tip of the movable contact at the time of full opening is positioned so as to substantially coincide with an imaginary line connecting the rotation fulcrum of the movable contact performing the rotational movement and the center of the arc runner or the like. Therefore, rapid cooling by high-speed rotation of the arc can be performed after the arc has been transferred to the arc runner, and this has the effect of enabling faster and smoother arc extinction. Further, in the present invention, the arc generated between the fixed contact and the movable contact is reduced by arranging the arc guide plate in the middle of the movable contact formed by the two plate-like members. This has the effect that it can be reliably guided to the arc guide plate. Further, in the present invention, the arc guide plate is formed of a magnetic material having a groove-shaped gap, and the movable contact is rotated through the groove-shaped gap so as to pass through the arc guide plate. The arc can be forcibly guided to the arc guide plate by the concentrated magnetic flux, so that there is an effect that the interrupting performance of the arc extinguishing device can be stably improved.

[Brief description of the drawings]

FIG. 1 is a side view in which main parts of an arc extinguishing device for a gas switch according to a first embodiment of the present invention are cut away.

FIG. 2 is a view according to the present invention, which is a cross-sectional view taken along the line AA of FIG. 1;

FIG. 3 is another operation explanatory view of the movable contact according to the first embodiment of the present invention.

FIG. 4 is a side view of an arc extinguishing device for a gas switch according to a second embodiment of the present invention, in which main parts are cut away.

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is a cross-sectional view of a conventional arc extinguishing device for a gas switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 100 Fixed contact 2, 200 Movable contact 3 Drive coil 4 Arcrunner 4a, 34 screw 5 Arc guide plate 5a Notch 5b Projection piece 6 Drive mechanism 10 Sealed container 11, 110 Fixed conductor 21, 210 Movable conductor 22 Rotation Support shaft 31 Mounting plate 32 Coil bobbin 33 Winding 34 Screw 35 Insulator cap 51 Main guiding portion 52 Auxiliary guiding portion 61, 62 Link arm 61a, 62a Support pin 63 Main shaft 220 Parallel portion P Center of arcrunner Q Tip of movable contact

Claims (4)

[Claims] 1. A gas switch wherein a movable contact is turned on and off with respect to a fixed contact housed in a switch filled with an insulating gas to turn on and off a distribution line. A gas in which a drive coil and an arc runner are arranged in the vicinity of a contact, and an arc generated when the fixed contact and the movable contact are opened is extinguished by moving the arc on the arc runner in a direction orthogonal to a magnetic field generated by the drive coil. In the arc extinguishing device for a switch, the movable contact is rotatably supported around a pivot point provided at a position facing the fixed contact, and the movable contact is rotated to open. Gas arc opening and closing, wherein the arc runner is disposed substantially along a direction, and an arc guide plate formed of a conductive material extends from an end of the arc runner on the fixed contact side toward the fixed contact. vessel Arc extinguishing device. 2. The arc extinguishing device for a gas switch according to claim 1, wherein when the movable contact is completely opened, the center of the driving coil and / or the arc runner and the pivot of the movable contact are rotated. An arc extinguishing device for a gas switch, wherein a tip of a movable contact is positioned so as to substantially coincide with an imaginary line to be connected. 3. The arc extinguishing device for a gas switch according to claim 1 or 2, wherein the movable contact is formed of two plate-like bodies parallel to a rotation direction, and the arc guide plate is provided. Is disposed at a predetermined interval in the middle of the two plate-like members of the movable contact. 4. The arc extinguishing device for a gas switch according to claim 1, wherein the arc guide plate has a concave groove-shaped gap through which the movable contact passes when rotating. An arc extinguishing device for a gas switch, characterized by being formed of a body.