JPS5882425A - Switch - 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 The present invention relates to a rotary arc type and self-blade expansion type switch, which includes a sealed container filled with a highly insulating gas, a chamber formed by dividing the inside of each of the ten vessels, and the above-mentioned chamber. A pair of contacts are provided in the chamber and form an annular chamber 4iilift that serves as a rotational path for the arc, and an arc whose end face is covered with an electrode on the corresponding side of the annular 1tWi and whose foot is fixed to this vt pole is provided. an accommodating portion provided inside one of the contacts for accommodating an annular permanent magnet adapted to produce a magnetic drive force in a rotational manner, and a center of both the annular permanent magnet and the me electrode cooperating therewith; The present invention is provided with a ventilation path for discharging the gas inside the room through the orifice portion.

French Patent Application No. 80-07904, filed on April 4, 1980 by the same applicant as the present application, relates to a switch similar to the present application, but this is a permanent switch with an impenetrable weir hole on the end face. With regard to magnets or those equipped with annular permanent magnets magnetized with radial polarity, since the permanent magnets obviously do not have internal holes for positioning, the ends are not subject to bidirectional blowing. The performance of the switch was relatively limited, and the current at any time remained below 10,000A. If an annular permanent magnet is used, the gas will be discharged following the central inner hole f, making it possible to blow the arc in two directions. It became clear that the performance did not improve much beyond the performance limit of magnetic switches.

As mentioned above, the present invention was inspired by the fact that switches using annular permanent magnets do not necessarily rotate the arc legs effectively, but stay on top of the contacts. this,
(1) As a result of further in-depth research, it was found that there is a part on the end face of a permanent magnet where the lines of magnetic force due to the magnetic field are locally closed. (2) This creates a part where an axial magnetic field is generated, and an arc It was observed that there was a tendency for the population to move. In such a portion of the axial magnetic field, no rotational force is applied to the arc, and the switch has only the function of a simple self-blade expansion type switch.

It is an object of the present invention to improve such drawbacks and to make the performance of a rotating arc switch using a permanent magnet comparable to that of a rotating arc switch using a blowout coil.

The switch according to the invention is characterized in that the permanent magnet is axially polarized so that in a zone adjacent to the cooperating annular electrode,
A radial field is oriented in one direction toward the center and the opposite direction is directed toward the outside, and an axial magnetic field is generated at the apex, I, which is the boundary between the center and the outside;
The cooperating broken Vt and fjj poles opposite to the poles are arranged so that the arc extending between them is within the center of the magnetic field, and the switch is arranged such that the lost point is located at the end face It is characterized in that it is provided with such a measure as to completely avoid the arc moving towards this lost point.

The magnetic field created by an axially polarized permanent magnet is shown in axial cross-section in FIG. It is recognized that the lines of magnetic force are symmetrically closed inside and outside the permanent magnet.

If we look at the example in Figure 1, we can see that there are 8
The lines of magnetic force exhibit centripetal properties in the outer part, and centrifugal properties in the outward parts. A zone where the magnetic field lines are parallel to the axis separates these centripetal and centrifugal magnetic field lines. This zone should correspond to the position of the axial magnetic field lines, and is also the lost point where the two lines of magnetic field touch, and is also the substantial neutral zone of the magnetic pole face of the permanent magnet, and the arc is at this point where the rotational blowing effect due to the magnetic force is zero. Indicates the axis direction in which it will move toward the zone.

The present invention moves such cusps outward from the pole tip face to reach a zone where they are no longer sensitive to arcs.

In the first embodiment of the present invention, a T-shaped yoke provided in the hollow part of the annular permanent magnet realizes the transition to the outer peripheral part of the 6F permanent magnet. This tubular yoke distorts the magnetic field spectrum and moves the cusps outward from the permanent magnet. Furthermore, as will be explained below, by providing the yoke, a second magnetic field zone with a large axial magnetic field component will appear near the end of the yoke, but in this zone the gas blowing effect is Since it is the maximum,
Disappearance of ri occurs rapidly.

In a second embodiment of the present invention, the outer diameter of the permanent magnet is made significantly larger so that the apex points move away from the orifice, which is the hollow portion of the magnet.

It is advisable to make the contact facing the permanent magnet into a tubular shape so that this serves as a second gas outlet and double-gas blowing is performed on the arc. The inner diameter of this tubular contact matches the inner diameter of the inner hole of the annular permanent magnet. It is obvious that the rod-shaped permanent magnet fr for spraying can also be provided on the opposite bank of the opposing contact described here, and in this case, the structure as a whole becomes completely symmetrical.

The 1f pole fs that surrounds the outside of the annular permanent magnet in a cap shape is
The current flowing outside the magnet is small, but this is for the purpose of completely preventing the permanent magnet from being demagnetized, as described in the above-mentioned pending French patent. Also, this is because the arc is centered in the nail due to the loop effect.

Various features based on the present invention are detailed below. l! Regarding the examples, in addition to the above, there are various performances and features! icf, but these are examples and do not limit the scope of the present invention.
Examples of these are shown in the figures below.

FIG. 1 is a schematic longitudinal cross-sectional view showing the spectrum of the magnetic field produced by the annular permanent magnet in a shutoff device that suffers from unsatisfactory performance.

Figure 2 shows the closed position and open position of the switch according to the present invention.
FIG. 71Itf is a schematic diagram of a longitudinal section shown on the left m and right sides of the center line, respectively.

FIG. 6 is a simplified schematic diagram showing m-shaped permanent magnets and electrodes in a modification of the embodiment of the switch according to the present invention.

In FIG. 1, an annular permanent magnet 10 is mounted in the axial direction and is mounted on one pole face, for example an annular magnet 12 forming a north pole contact. A #I rod electrode 14 formed of the end surface of the tubular member 16 forming a contact is arranged opposite to the *-shaped electrode W112. Tubular member 1
The inner diameter of the magnet 6 is substantially the same as the inner diameter of the inner hole of the permanent magnet 10 disposed coaxially with the permanent magnet 6. FIG. 1 schematically shows the magnetic field lines between one IE pole 12 and 14, including a centripetal radial magnetic field line 20 and a centrifugal radial magnetic field &1i122. In the space, the centripetal magnetic field lines 20 and the centrifugal output @22 are distributed symmetrically to both @I of the zone where the axial magnetic field lines 24 are located. The zone of the axial magnetic field lines 24 corresponds to the cusp 26 on the magnetic pole face of the permanent magnet 10.

To be exact, this cusp 26 is a line as a collection of sharp points, and is located on the circumference of the annular permanent magnet 10, which is equidistant from the inside of the inner diameter and the outer diameter. .

The arc 28 extending between both sides FA12 and FA14 has a cusp ψ2
The arc remains stagnant at this cusp 26 because the magnetic field there does not produce a driving force to rotate the arc. It is clear from the above-mentioned 1# example that a switch equipped with such a device is severely limited in its performance and performance.

Fig. 2 shows a switch which is improved by utilizing the basic i1g of the example shown in Fig. The tubular member 16 having the end face 14f is the podium described above.

The tubular member 16 has an annular shape *ff1 in the closed position II of the switch.
12, and is slidably provided so as to be able to take a position in which it is in contact with the object 12, and in a position in which it is in contact with the object 12 in FIG. Permanent magnet 10, electrode 12'Et
and 14, for example, the cylindrical container 3.
It is housed inside a chamber 60 formed by 2. This cylindrical container is itself housed in a closed container 64 filled with highly insulating gas, such as 8F6 gas. The movable tubular member 16 extends through the bottom of the chamber 30 to form a lateral orifice 66.
It communicates with the closed container 64 through the chamber 60, so that the gas inside the chamber 60 can be discharged into the closed container 64. The annular chamber 12 cooperating with the permanent grinding stone 10 is electrically connected to a cylindrical conductor 68 that surrounds the annular permanent magnet 10 from the outside, and this cylindrical conductor 68 passes through the chamber 30 and into the orifice 42. The chamber 60 and the airtight container 64 are connected to the electric conductor support tube 40. That is, the advancing support tube 40 has a truss-like shape, and the gas in the chamber 60 passes through the inside of the pole 12 and the permanent magnet 10 into the closed container 6.
It will be easily understood that a second ground air passage 44 is formed for discharging into the air.

The combination part consisting of the aphrodisiac support tube 40, the permanent magnet 10, and the platform electrode 12 that cooperates with it is incorporated as a fixed part, and when the tubular member 16 slides downward, both the electrodes 12 and 14 are connected. An arc is created between the two.

Extending into the interior of the arc chamber 60, the pressure within the chamber 60 is increased by heating, and thereby the gas is transferred to a fixed member including the tubular member 16, the ring electrode 12, and the electrode support tube 40, which becomes the movable contact 411+. Respective exhaust air passages 56 with sections
and 44, and then discharged from the chamber 60.

The permanent magnet 10 is magnetized in the axial direction, and the magnetic pole face facing the pole 14 at the end 1 of the tubular member 16 is set to be, for example, an N pole. A tubular yoke 4 is installed in the inner diameter hole 18 of the permanent magnet 10.
The yoke member 46f including 8 is extended so as to be in close contact with the inner surface of the permanent magnet, and to be on the same plane as the end surface of the permanent grinding stone. The yoke 46 further includes a perforated disk 50 that is connected to the tubular yoke 48 and tightly contacts the rear end surface of the permanent magnet 10. The yoke 46 distorts the magnetic field spectrum of the permanent magnet 10, as shown on the right side of FIG.
0 cusp a52f is biased toward the outer body, making the magnetic field spectrum asymmetrical. Centrifugal magnetic field lines 54 wrap around the outside of the permanent magnet, whereas centripetal magnetic field lines 56 are concentrated toward the end of tubular yoke 48 .

The operation of the switch shown in FIG. 2 is as follows.

When the switch is in the closed position, as shown on the left side of Figure 2, electric power is transmitted to the tubular member 16 constituting the movable contact, both electrodes 14, 12, which are in contact with each other, the short-circuit body 68, and the submerged electric support tube. Since the yoke 40 is in communication with the permanent magnet, no demagnetizing effect is exerted on the permanent magnet.More specifically, the yoke 46 is insulated from the isoelectric components that serve as current paths, or has an extremely high electrical resistance tube. It is.

When in the open circuit position, as shown on the right side of FIG. 2, the arc extends between the electrodes 12, 14, as if a cloud of extremely hot gas were trapped between these electrodes. This Kass Prize is considered to have been defeated in six parts as shown below.

First, the central part is placed in a centripetal radial magnetic field 56 and is affected by it.
trying to move towards. And inside! The portion is engaged with the circular imaging portion of the annular electrode 12. Of these-
One portion further extends into the axial magnetic field zone, where the gas discharged through the ventilation passage 44f has a large gas flow blowing effect and rapid arc extinguishment. The central portion receives the magnetic blowing effect due to the main portion of the magnetic field generated by the permanent magnet 10 in the radial direction. The outside-1 portion is caused by the blowing effect of the gas flow discharged from the ground air passage and the loop effect caused by the current flowing from the outside of the annular pole to the opposite direction toward the cusp 52, where the gas is directly outside. It experiences a centripetal force that drives the part toward the center.

In this way, the switch becomes capable of breaking the current over a wide range of current values, improving its breaking performance.

Fig. 2 shows a preferred embodiment of the present invention, but as a spraying device using an annular permanent magnet magnetized in the axial direction, the conotact facing it is solid, and a one-way A combination in which gas is blown out only during the period is also a reusable unit. It is also possible to similarly arrange two annular permanent magnets symmetrically and have tubular contacts cooperate with each other. The yoke 46 does not necessarily have to be accompanied by the perforated disk 50 on the rear surface, and it is only necessary to focus on the concentration of magnetic lines of force in the front zone. It is possible to combine it with any contact method as long as it can be used. Although a combination with a self-blowing system appears to be most advantageous for the time being, it would also be possible to combine it with any other spraying system, in particular with a piston-based buffer spraying system.

The shape of the yoke 46 may be different from that described above, and the shape of the yoke 46 may be an annular type with opposite apexes A32f of the permanent magnet. It may be realized by

Figure 6 shows only the pot cable inside the chamber 60, that is, 1JIE!
The annular member 16 and the annular surface 14 facing the fixed portion added to the support tube 40 at its end face are shown. The axially magnetized annular permanent magnet 58 is similar to the permanent magnet 10 shown in FIG. 2, but has a significantly increased outer diameter.

An annular electrode 60 that cooperates with the permanent magnet 58 and covers its magnetic pole end surface is electrically connected to the support tube 40 by a conductor member 62 that surrounds the permanent magnet 51 from outside.

As described above, the gas in the chamber 60 is heated to increase the papermaking pressure f, and passes through the center hole of the 3J cane permanent magnet 58 into the air passage 4.
4 and is discharged through an airway formed by a tubular member 16. Since the permanent magnet 58 is not provided with a yoke, the &i rise is particularly symmetrical with respect to its cusp 64. However, the outer diameter of the annular permanent magnet 68 is adjusted in such a way as to prevent the tip from moving to the cusp 64 by the means already described.
The size is increased so that the apex 64 can be kept sufficiently separated from the annular electrode 14.

The operation of the switch of this embodiment is the same as that illustrated in FIG. 2, so there is no need to describe it again. It is clear that the increase in the external dimensions of the permanent magnet 58 can be combined with a yoke that modifies the magnetic flux fn* or with any other method of distorting the arc blow field. The outward transition of the cusp 64 is particularly clear in comparison with FIG. Good results have been obtained by doing so.

In the two embodiments described above, it is also preferred that the wall thickness of the tubular member 16 be made thin so that the width of the annular electrode 14 can be reduced in order to accurately position the arc. In addition, if the spraying effect on the tubular member 16 can be reduced, the diameter of the channel for this spraying can be made smaller and the dimensions of the annular electrode 14 compared to the inner diameter of the central orifice of the annular permanent magnet 10 or 58. It may also be made smaller.

The present invention has been described with respect to its method of implementation, and it is understood that it is not limited to what is shown in the drawings, but that it encompasses all embodiments that may be considered equivalent.

[Brief explanation of the drawing]

11. It is a schematic diagram of a vertical cross-sectional view of a switch for explaining the principle of the present invention. FIG. 2 is a schematic diagram of a vertical cross-sectional view showing one embodiment of the present invention, and shows the closed circuit position and the open circuit position on the left and right sides of the center line, respectively. FIG. 6 is a schematic longitudinal sectional view showing another embodiment of the present invention. 10: Annular permanent magnet 12, 14: J-shaped electrode 16: Movable tubular member 26: Apex 60: Chamber 62: Cylindrical container 64: Sealed valley 9
58: Cylindrical conductor 36, 42 Niorifice 4
0: Current support tube 44: Second ventilation path Patent applicant Nissin Electric Co., Ltd. Representative Masakatsu Yamawaki 1 Uo 3 Same

Claims (1)

[Scope of Claims] l A rotary arc type and self-blade expansion type switch comprising: a sealed container filled with a highly insulating gas; a chamber formed by dividing the inside of the sealed container; and a chamber provided inside the chamber. a pair of contacts forming an annular ionization which serves as a rotational path for the arc, and an end face covered with an electric contact on a corresponding side of the annular ionization, and an arc to which a foot is attached to the ionization rotates. a central orifice of both the annular permanent magnet and the cooperating annular magnet; The permanent magnet is axially magnetized and located in the area adjacent to the cooperating annular ionization, while the radial magnetic field is centered at the center. The magnetic field is oriented in the opposite direction at the outer periphery, and on the other hand, the axial magnetic field forms the boundary between the center and the outer periphery at the lost point. Further, an annular electric arc opposite to the annular electric arc is arranged such that an arc extends between the annular electric arcs within the magnetic field at the center, and the lost point is moved in the direction of the outer periphery on the end face. . A switch characterized in that it is provided with means for completely preventing the arc from moving to the tip. A patent characterized in that the permanent magnet is provided with an internal yoke so that the tip is biased in the direction of the external station and the magnetic field is asymmetrical.
The switch described in the required range item 1. 1. The switch according to claim 2, wherein the internal yoke is a tubular body and extends into the central orifice of the permanent magnet to form a full-flow tsg for exhaust. 3. The switch according to claim 2 or 3, wherein the internal yoke further includes a disk behind and at the end surface t-S of the permanent magnet in addition to the tubular body. Claims 1 to 4, characterized in that the above-mentioned opposing annular ionization is constituted by an end face of a thin-walled tubular member, and the inner diameter thereof is substantially equal to the diameter of the central orifice of the permanent magnet. A switch listed in any of the above. K. The switch according to claim 5, wherein the tubular member constitutes a second gas discharge path from the chamber, and the discharge cross-sectional area thereof is close to that of the ventilation path. . Z The internal yoke is electrically insulated from the rear end face of the contact, thereby forcing the shunting path of the current to the outside of the permanent magnet, and moving the arc toward the center due to the current loop effect. 7. The switch according to claim 5 or 6, characterized in that: 1. The switch according to claim 1 or 5 or 6 or @7, characterized in that a permanent magnet with an increased outer diameter is provided. Father: Claims 1 to 8 of the invention are characterized in that the mountain diameter of the circumference formed by the above-mentioned points is at least twice as large as that of the opposing broken-like electric currents. switch. 10. The switch according to any one of claims 1 to 9, characterized in that a permanent jamb is made to cooperate with each of the contacts.