JPS5979921A - Vacuum interrupter - 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 an A-air interrupter, and in particular to a coil k1ii that applies a magnetic field parallel to an arc generated at the time of interruption.
This relates to a vacuum interrupter with ft.

Conventionally, a Shinbon interrupter has been provided that applies a magnetic field in the i'N'ti11 direction (longitudinal magnetic field) at a magnetic field parallel to the arc, with the entire purpose of achieving the same as above in interrupting performance. Ark K96 will be born! 4 r
If the back of a pair of contact electrodes is provided with a VC valley, the axial distance is 1i? A conventional f-field application type blank interrupter in which m pieces of f i are pasted is shown in Figures 1 and 2.

Referring to the figure, ((lt, 1-) is a container made of glass or ceramics (Rokudo+1a, 11b,
Kono loquat 1 alarm tube 11 a, 11. The end plate 12i3, which is made of metal plate, is sealed at both ends in the direction of b, and is acid-resistant. There is a contact point through the coil opening 4a.
F is provided with pole 3a. On the other end plate 13, a reed 2b is airtightly protruded through the bellows 14, and a coil is provided at the inner end of the reed 2b. A contact electrode 3b is provided via the electrode 4b.

The portions of each of the coil electrodes 4a and 4b are shown in Fig. 74.
It is structured as follows, and li! Coil + on the il& side
When the 6th brother explains at 1m4a, this coil free pole 4a is,
41 radially outward from the lead rod sear;
And one end is 1. at the outer end of each 1u41. There are 414 circles 1j11-+2♂ of 1 diagonal drawn, and the tip of each circular slack part 12 is connected to the central part of the contact electrode 3a through the double conductor 113. This results in lead 4”P 2
a and contact E [pole: (a and 1141, coil acid 4m4a changes the flow into a loop current surrounding lead wire 2a and contacts Ni: den3 a (, (b l to 1
direction (that is, the axial direction); 1 field (magnetic field) parallel to the arc is generated.

! ' In Figure 1, ■5 is the intermediate shield, 16a and 1
6bkl: Auxiliary shield 17 is a bellows shield, which is a shield body made of stainless steel with non-contact properties, and captures the gold powder 4 vapor scattered from the pair of contact point electrodes 3a, 3b, and 4. I want to make a world of peace.
It is.

And one contact electrode 3b is connected to IJ-do 2 in the figure.
By moving up and down via b, the other contact electrode 3
aK contact 1tIl#shi, this causes the input of CLj + clear and the addition of lr and lr.

By the way, in the A/Tarabuta constructed as described above, the coil 1JL pole 4a (4b) which generates the magnetic field in the +1(It force direction) is the contact point it4m3a (:(
b), so if the coil electrode 4a (4b) is only provided at the 41st part of one contact electrode 3a (3b), it will not be flat (straight) with respect to the arc. It is the place to apply the full magnetic field, and the other party 11I
At the contact point (electrode side) of u, a part of the magnetic field becomes distorted. As a result, no axial magnetic field is applied to the arc, causing the problem that the arc dispersion effect is weakened and the arc becomes more likely to be bundled.

Therefore, from this point of view, as mentioned above, the coil electrode 4
A and 4b are located on the 1m side of the arc column,
A pair of contact electrodes 3a, 3b are provided with valleys on the back, and the two coils form a composite slit by foaming 4a, 4b to effectively divide the arc.

However, a pair of contact electrodes 3a are in contact with each other.

Since the coil electrodes 4a and 4b are respectively provided on the back of 3b, the coil electrodes 4b provided on the back of 3b on the movable side do not move with time. 1 h between the other coil and the pole 4a.
will spread. For this reason... ``As the interval between electricity increases, the synthesis hfl￥L I+,t?
X There was a river during the 11th time of Moefu.

For this purpose, a pair of contacts 11-
I, i@, ia+3bK@Tani coil electrodes 4a, 4b are set up by -C--bent interrupter due to τ property (
There was a limit to the improvement of Jhi (shaka valley) compared to V.

However, providing coil electrodes 4a and 4b on the backs of the pair of IL contact poles 3a and 3b increases the number of 711B products and increases the number of joints (brazing) (2. Problems such as poor durability) In particular, the 1iJ excitation side is
By having the 1-ratio pole 4b, there was a problem that the ijJ movement Ikl increased, the size of both armies increased, and the l1ltj durability decreased.

Furthermore, in the conventional 6-nitride interrupter, an intermediate shield 15 is provided at the floating φ by surrounding the poles J, a, and 3b at the pair of contacts F. ] Each member in the first direction centering on the L poles 3a and 3b was arranged in a medullary arrangement to make the medullary field distribution uniform.However, this 1.11
A pair of electrodes 3a, 3b and a coil electrode 4a.

4b is provided via the leads 2a, 21) extending in the Iq11 direction, which causes the problem that the entire vacuum interrupter becomes larger in the axial direction.

The present invention solves the above-mentioned problems in the type 116 vacuum interrupter that applies a magnetic field in one direction, thereby creating a vacuum interrupter that achieves the same performance and is miniaturized. The first objective is to provide

Next, 46 flow examples of the present invention will be explained based on Figs. 3 to 11. Items with the same reference numerals as those in Fig. 1 and the white 2 above refer to equivalent products. Detailed explanations of these will be omitted.

One embodiment of the present invention will now be explained based on FIGS. 3 to 5.

L4 粱'14 The inspection 10 includes an insulating cylinder 11 made of glass or ceramics, and one end side of this insulating cylinder 11 (bottom y in the figure).
(11!!) of the insulating cylinder 11 (upper 1'tAf side in the figure) It consists of a substantially cylindrical cylindrical plate 5 made of stainless steel and equipped with a ceiling plate 51, which are connected to each other. and metal container 5
An annular female fitting ti provided on the insulating cylinder 11 is provided at the lower part of the inner part.
A shield 18 made of non-magnetic stainless steel is provided as shown in FIG.

There is a 1ψ point 'i1 on the ceiling board 51 of Kimu Yong-ik 5 in the inner y-yu area.
7. A fixed-side glue rod 2a equipped with a pole 1a is provided to pass through the lead rod 2a in an airtight manner.One of the winding ends of the coil body 6 is attached to the outer end t'; The coil body 6 is connected to the gold plate @container 5.
The outer periphery of the gap A is surrounded by a pair of contact electrodes 3aj.
+'t and 3b are provided so as to surround the VC (uniform p group shown in FIG. 3) at the time of cutoff.

This coil body 6 has a slit 62' at the 11th point and is formed into a circular shape with one turn.
il, and both jJ portions (winding ends jjl
s) A pair of first arms 63 and a second +I electric wire 65 arranged in parallel with the wrist inward from the parts of ()1a and (31b), and a pair of arms provided at the inner end of the arm 63 of @1. 1st grade
It is configured to include a base 64 and a second base 66 provided at the inner end of the arm 65 of 4J2.

The first base 64 is provided with a through hole 64a -C,
The outer end portion 21 of the lead rod 2a is fitted and connected. In addition, @2 base 66 is arranged via space 67.
(surrounded), and one end side of an external lead 7 formed in a substantially cylindrical shape is connected to this 24th portion 66 .

This external lead 7 has a stepped hole 71 inside and a notch 72 at the end portion located on the second base hammer side.
The first arm 63 can be inserted through the notch 72 through a gap. A spacer 8 is installed and fixed in the stepped hole 71 of the external lead 7.

The spacer 8 is made of a non-magnetic material, such as stainless steel or Inconel alloy, which has low conductivity and high mechanical stability.The spacer 8 is formed into a substantially cylindrical shape, and is The flange 81 is attached to the device at a predetermined position.
and a screw groove 8 inside one end in the axial direction (upper end in the figure).
2. A mounting bolt is screwed into this threaded groove 82 when attaching a pull-out terminal conductor (not shown) to be brought into contact with and engaged with the outer end portion 73 of the external lead 7 . The other end of this spacer 8 (lower end in the figure) is still MMe.
The first base portion 64 of the coil body 6 is protruded through and protrudes from the first base portion 2a.
The brazing is carried out in a layered manner to improve the position 1a and the looseness of the connection during connection.

The member provided between the external lead 7 and the end of the coil body 6 in FIG. inner ring 91;
It is comprised of an outer ring 92 that is coupled to the end of the coil body 61 of the coil body 6, and a plurality of arms 93 extending in the middle diameter direction that connect these inner and outer rings 91 and 92. The outer ring 92 is provided with a cutout 94 at the -1 point, and is configured to match the slit 62 of the coil body 6, which extends between the slits 62 of the coil body 6. The ring 92 is configured so that it does not bridge. This reinforcing body 9 is formed from a material similar to that of the spacer 8.

To explain the flow of current in the Mashiba interrupter configured as described above, the current entering from the external lead 7 flows through the entire second base 66 of the coil body 6 and the second arm 65, then the coil body 61. A loop-shaped V flows from one end 61b to the other end 61a, generating an axial magnetic field at this time, and then from the end fila through the first arm 63 and the base 64 of the groove 1. It reaches the lead rod 2a on the fixed port side. And the lucid point electrode 3a and the phase electrode 3b
(When the arc is cut off, the entire valve is turned off) through the movable side 1
This leads to the lead rod 2b.

Note that the metal container 5 is not limited to one that includes the ceiling plate 51 integrally, but may be a combination of separately formed items.

The items shown in FIGS. 6 to 11 are other embodiments of the present invention, and the same reference numerals as those in FIGS. is omitted.

First, the one shown in FIG. 6 is provided with a 7 flange 52 protruding radially outward at the ring part (i) of the metal container 5 and the insulating cylinder 11 (i (lower end in the figure)). One surface side (upper surface in the figure) K1 is one in which the lower end surface of the coil body 61 forming the coil body 6 is integrally joined, and the annular warping device lJ c provided on the insulating cylinder 11 and the shield 18 are fixed to the opposite surface. A concave groove 53 is provided on the outer circumferential surface of the 7-flange 52, so that the plate thickness of the joint part is the same so that the joint (welding) with the #-shaped metal fitting + IC can be performed well. has been made.

According to this configuration, since the lower end of the coil body 6 is fixedly held, even if the coil body 6 is rinsed during loading and uncooling, the coil body 6 does not vibrate abnormally, and the durability is improved. be.

Next, as shown in FIG. 7, an annular support fitting 54 as shown in FIG. 8 or 9 is fixed to the lower end of the metal container 5 to support the coil body 6. As shown in Figure 8,
The supporting metal fitting 54 protrudes toward the outer circumferential side of the ring body and is coupled to the coil body 6. It is constructed by providing Ij number of support portions 55. On the other hand, the one shown in FIG. 9 is constructed by providing a plurality of notches 56 on the outer peripheral side of the ring body.

Note that these supporting metal fittings 54 are made of a material that is low in quaternity, has high mechanical strength, and is non-magnetic, such as stainless steel or Inconel alloy. Further, the support fitting 54 may not be completely round, but may be provided with a notch corresponding to the slit 62 provided in the coil body 6.

According to this configuration, since the MVC support fitting 54 can be provided at any arbitrary position of the metal container 5, it is possible to accommodate the coil body 6 having the length in the axial direction of the citron.

Furthermore, in the case shown in FIG. 10, the coil body 6 of the coil body 6 is attached to the coil body 6 in order to further prevent the installation and fixation of the coil body 6 from dust.
The lower end of the coil holder 6 is fixed to a steel arm 63 . Second arm 65. The first base 64 and the second base 66 are fixed to the ceiling plate 51 of the metal container 5.

By the way, in the coil body 6 in each of the embodiments described above, the coil body 61 was configured in a substantially etern shape as shown in FIG. 4, but the coil body 6t is not limited to this. Divide into +iU (14, 14, 14
J It is okay even if it is said to be an accented form of coil, and there is a cedar branch (V2 turn) in the ml1 diagram.
The coil body 6 in this case is shown.

That is, in FIG. 11, a pair of first bases 64 that are sharpened radially outward from the first base 64 to which the lead rod 2a is connected are shown.
arm 63, two semicircular arc-shaped coil bodies 61 each having one end connected to each outer end of the first arm 63 and facing inward in the same direction, and a distal end portion of the coil body 61 in the arc direction. a pair of second arms 65 connected to each other and arranged parallel to the first arm 63 with a gap therebetween; and a second arm 65 provided at the inner end of the second arm 65 and around the first base 64. and a second base 66 which is disposed through a gap 67' and to which the external lead 7 is connected.

According to the configuration shown in FIG. 11, the '1 current between the external lead 7 and the lead rod 21k (contact electrode 3a) is divided into two branches, so that the six arms 63 forming the coil body 6 are divided accordingly.
．． 65 and the coil body 61 can have a small cross-sectional area, which is advantageous in terms of miniaturization and heat generation point. In addition, in the case of 1 I branch flow (1 turn) and 1/ branch flow (letter/), the coil body 61 is divided into 3 parts.

It can be similarly implemented by dividing into four parts and increasing the number of six arms 63, 65 and the second base (i6).

In each of the above-mentioned embodiments, a case has been described in which the coil body 6 and the fixed lead rod 2a are formed separately, but the present invention is not limited to this, and both members may be formed integrally. It is acceptable even if the

The present invention having the configuration as described above has various effects as described below.

(2) The coil body 6 is formed into a cylindrical shape and is fixed outside the vacuum vessel 10, and also surrounds both the pair of contacts/electrodes 3a and 3b on the fixed and movable sides even when cut off. Even if the movable contact electrode 3b moves during breaking, the magnetic field applied to the arc will not be attenuated, and the breaking performance can be improved.

■ Since there is no coil body on the movable side, the movable side member is lightweight, and the operation force required for inputting and cooling is small, and the impact force e↓ is small, making it possible to downsize the operating device and reduce the vacuum interrupter. Durability can be improved.

(2) The coil body 6 is provided so as to surround the outer peripheral surface of the metal container 5 provided at one end of the vacuum vessel 10 in the axial direction, and since the coil body 6 and the metal +4 container 5 are at the same potential,
There is no problem even if they are provided close to each other or in combination, and the vacuum interrupter can be made smaller.

(2) Since the coil body 6 is provided outside the vacuum chamber 10, the heat dissipation effect is good.

(2) The lead rod 2a on the fixed side can be shortened, so that the heat generated at the contact points m3a and 3b is easily led to the outside, improving the cooling effect.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional vacuum interrupter, FIG. 2 is a perspective view of a cross-section taken along line A-A in FIG. 1, FIG. 3 is a cross-sectional view of a vacuum interrupter according to an embodiment of the present invention, and FIG. is a perspective view of the coil body etc. in FIG. 3, FIG. 5 is a perspective view of the reinforcing body in FIG. 3, and FIGS. 6, 7, and 10 are vacuum interrupters according to other embodiments of the present invention. FIGS. 8 and 9 are a perspective view of the support fitting in FIG. 7 and a perspective view of another embodiment, and FIG. 11 is a perspective view of a coil body according to another embodiment of the present invention. . [0... Vacuum container, 14... Bellows, 2a and 2b...
・Lead rod, 2''...outer end of (lead rod 2a), 3
a and 3b... Contact electricity, 1 bush, 5... Gold A @ container,
51... Ceiling plate, 6... Coil body, 63... First
．． Arm, 65...Second arm-7...External lead. Figure 3 Figure 6 Figure 10

Claims (1)

[Claims] Approximately half of -y11 NU in the axial direction of a cylindrical vacuum container 0ω consisting of loquat edge k vl + 7 is formed with a metal container (5) equipped with a ceiling plate (51), and placed in the synthetic fiber container (5). A pair of contact electrodes (3a and 3b) are provided, and one contact electrode (3a) is connected to the inner end of the lead wire (2a) which passes through the metal fittings airtight through the ceiling plate (51) of the container (5). The other contact electrode (3b) is provided through the lead wire (2b) and the retractable bellows T141 through the TiU arrangement, 3 and the container (10), and the front 11 pin IS. Valley visit (5) I
N: Surrounds the outer periphery of part i and also includes the pair of contact electrodes (3
+1tii Ii*j tentatively surrounding a and 3b)
A coil body (6) having the shape of
1), and the other end is located in the radial direction via the arm (65) of the claw 2, and an external lead (7) is connected to the inner end thereof.
An A2 interageter characterized in that it is configured by connecting.