JPH05266769A - Longitudinal magnetic field electrode of vacuum valve and its manufacture - Google Patents

Abstract

PURPOSE:To provide a longitudinal magnetic field electrode of a vacuum valve suitable for strong operating force, and the integrated manufacture of the electrode, by improving the mechanical strength. CONSTITUTION:The gap part between a contact 1 and a coil part of a coil-like conductive member 2 is filled with an insulative reinforcing member 6. This unifies stress applied to a contact 1 with the reinforcing member 6. Also integral forming is made possible by sintering the powder, etc., of conductive material in the circumference of the reinforcing member 6 with it as a core.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical magnetic field electrode for a vacuum valve and a method for manufacturing the same.

[0002]

2. Description of the Related Art For example, FIG. 6 shows a structure of a vertical magnetic field electrode of a conventional vacuum valve described in Japanese Patent Laid-Open No. 192637/1982. FIG. 6 is a perspective view showing a structure of a vertical magnetic field electrode of a conventional vacuum valve. In FIG. 6, the vertical magnetic field electrode of the conventional vacuum valve is connected to the disk-shaped contact 1, the coil-shaped conductive member 2 provided on the back surface 1a of the contact 1 and generating the vertical magnetic field, and the coil-shaped conductive member 2. The electrode rod 3 is provided. The coil-shaped conductive member 2 includes four convex joint portions 2a connected in a direction perpendicular to the back surface 1a of the contact 1, and parallel to the back surface 1a of the contact 1 connected to each joint portion 2a. Four arc-shaped coil portions 2b having a maximum diameter substantially equal to the outer diameter
And a connecting portion 2d for connecting to the electrode rod 3, and a connecting portion 2d
And four spoke portions 2c connecting the respective arc-shaped coil portions 2b.

The conventional longitudinal magnetic field electrode shown in FIG.
Used as fixed contact and movable contact of circuit breaker. When the circuit breaker is opened, an arc is generated between the fixed contact and the movable contact. However, the current flows from the electrode rod 3 to the connecting portion 2d of the coil-shaped conductive member 2, the spoke portion 2c, and the arc-shaped coil portion 2b.
And the convex joint portion 2a to the contact 1, so that a vertical magnetic field parallel to the arc is generated between the fixed contact and the movable contact by the current flowing through the spoke portion 2c and the arc-shaped coil portion 2b. The magnetic field diffuses the arc (lowers the current density) and provides good breaking performance.
Since this principle is well known, illustration is omitted.

[0004]

As described above, the vertical magnetic field electrode of the conventional vacuum valve has the contact 1 and the coil-shaped conductive member 2.
Is connected only to the four joints 2a, the contact 1 and the electrode rod 3 are not directly connected, and the rear surface of the contact 1
There is a space between 1a and the electrode rod 3. However, since the operating force of the electrode is transmitted through the electrode rod 3, the mechanical strength of the spoke portion 2c and the arcuate portion 2b of the coil-shaped conductive member 2 becomes a problem when the electrode is opened and closed, particularly when the electrode is closed. That is, there is a problem that the operating force of the electrode is limited by the mechanical strength of the spoke portion 2c and the arcuate portion 2b of the coil-shaped conductive member 2. Further, since there is a space between the contact 1 of the vertical magnetic field electrode of the conventional vacuum valve and the coil-shaped conductive member 2, and the shape of the space is complicated, it is difficult to integrally mold this. Had a point.

The present invention has been made in order to solve the above problems, and improves the mechanical strength of the vacuum valve, which is adaptable to a strong operating force, and the longitudinal magnetic field electrode of the vacuum valve. The purpose is to obtain a manufacturing method.

[0006]

The vertical magnetic field electrode of the vacuum valve according to the invention described in claim 1 is a flat contact, and an electrode rod whose axis is in a direction perpendicular to the flat portion of the contact. And at least one convex joint provided between the contact and the electrode rod and electrically and mechanically connected in a direction perpendicular to the back surface of the contact, and connected to the convex joint. A coil-shaped conductive member having a coil portion parallel to the back surface of the contact, and a connection portion for electrically and mechanically connecting the coil portion and the electrode rod, and the contact and the coil-shaped conductive member. An insulating material, which is provided between the contact and the back surface of the contact and the surface of the coil-shaped conductive member facing the back surface, respectively, and an insulating material, or a material of the coil-shaped conductive member or a material of the contact. Made of high resistance material And it provided strong and member. A method for manufacturing a vertical magnetic field electrode for a vacuum valve according to the invention as set forth in claim 2, wherein the first layer is a flat plate having at least one notch, and the notch is formed on one surface of the first layer. And a reinforcing member having a second layer in which a groove formed in a predetermined coil shape is formed with an insulating material or a material having a higher resistance than the material of the coil-shaped conductive member or the material of the contact. A step of forming the reinforcing member as a core, and integrally molding the outside of the reinforcing member with a powder of the material of the coil-shaped conductive member or the material of the contact into a predetermined shape, and sintering the integrally molded material. To have. A method of manufacturing a vertical magnetic field electrode of a vacuum valve according to claim 3, wherein a flat plate-shaped first layer having at least one notch portion, and the notch on one surface of the first layer are provided. And a reinforcing member having a second layer in which a groove formed in a predetermined coil shape is formed with an insulating material or a material having a higher resistance than the material of the coil-shaped conductive member or the material of the contact. The step of inserting the reinforcing member into a vacuum hot press mold and holding it at a predetermined position,
A step of injecting powder of the material of the coil-shaped conductive member or the material of the contact into the vacuum hot press mold, and heating and pressing. According to a fourth aspect of the present invention, there is provided a method for manufacturing a vertical magnetic field electrode for a vacuum valve, comprising: a flat plate-shaped first layer having at least one notch portion; and the notch on one surface of the first layer. And a reinforcing member having a second layer in which a groove formed in a predetermined coil shape is formed with an insulating material or a material having a higher resistance than the material of the coil-shaped conductive member or the material of the contact. The step of integrally forming the outside of the reinforcing member into a predetermined shape with the powder of the refractory component of the contact material, and infiltrating the conductive component of the contact material into the refractory component of the contact material. And a step of performing. According to a fifth aspect of the present invention, there is provided a method for manufacturing a vertical magnetic field electrode for a vacuum valve, comprising: a flat plate-shaped first layer having at least one notch, and the notch on one surface of the first layer. Connected to
And a second groove formed with a predetermined coil shape
Forming a reinforcing member having a layer of an insulating material, or a material having a higher resistance than the material of the coil-shaped conductive member or the material of the contact, a step of holding the reinforcing member in a predetermined position of a predetermined mold, A step of pouring a melted material of the material of the coil-shaped conductive member or the material of the contact into the mold.

[0007]

In the longitudinal magnetic field electrode of the vacuum valve according to the first aspect of the present invention, the stress due to the driving force transmitted through the electrode rod causes the joint between the contact and the convex joint of the coil-shaped conductive member. The reinforcing member is dispersed so that the stress is not concentrated on. Further, in the method for manufacturing a vertical magnetic field electrode of a vacuum valve according to each of the inventions described in claims 2 to 5, the reinforcing member functions as a mold, and the contact formed in the shape of the notch and groove of the reinforcing member. A conductive portion such as a material substantially serves as a coil-shaped conductive member. As a result, the longitudinal magnetic field electrode of the vacuum valve according to the invention described in claim 1 is substantially obtained.

[0008]

Embodiments 1 of a vertical magnetic field electrode of a vacuum valve according to the present invention
An example will be described with reference to FIG. FIG. 1 is a perspective view showing the structure of a vertical magnetic field electrode of a vacuum valve in this embodiment. In FIG. 1, a disc-shaped contact 1 and a back surface 1a of the contact 1
A coil-shaped conductive member 2 that is provided in
The electrode rod 3 is connected to the coil-shaped conductive member 2, and the reinforcing member 6 is provided between the contact 1 and the coil-shaped conductive member 2. The coil-shaped conductive member 2 is the back surface 1a of the contact 1.
Four convex joint portions 2a connected in a direction perpendicular to
Connected to each convex joint 2a and parallel to the back surface 1a of the contact 1,
And has a maximum diameter that is substantially equal to the outer diameter of the contact 1.
It is composed of one arc-shaped coil portion 2b, a connecting portion 2d for connecting to the electrode rod 3, and four spoke portions 2c connecting the connecting portion 2d and each arc-shaped coil portion 2b. The reinforcing member 6 includes a first layer 6a having a shape similar to that of the contact 1 excluding the convex joint portion 2a of the coil-shaped conductive member 2, and further the coil-shaped conductive member 2 formed from the disk.
4 arc-shaped coil portions 2b, a connecting portion 2d, and a second layer 6b having a shape excluding the four spoke portions 2c. The reinforcing member 6 is formed of an insulating material, or a material having a higher resistance than the material of the coil-shaped conductive member 2 or the material of the contact 1. The thickness of the first layer 6a of the reinforcing member 6 is substantially equal to the height of the convex joint portion 2a of the coil-shaped conductive member 2, and the first layer 6a of the reinforcing member 6 and the back surface 1a of the contact 1 are Contact almost all surfaces. As a result, the stress due to the driving force transmitted through the electrode rod 3 is evenly distributed in the contact 1.

Next, a first embodiment of a method of manufacturing the vertical magnetic field electrode of the vacuum valve shown in FIG. 1 will be described with reference to FIG. In FIG. 2, the reinforcing member 6 is formed in advance in the shape shown in FIG. 1 from an insulating material or a material having a higher resistance than the material of the coil-shaped conductive member 2 or the material of the contact 1. That is, the reinforcing member 6 is provided with the first cutout portion 6c.
Formed in the same shape as the coil of the coiled conductive member 2 shown in FIG. 1 and connected to the notch 6c on the surface of the first layer 6a which is not in contact with the back surface 1a of the contact 1 of the first layer 6a. A second layer 6b having a groove 6d formed therein. The layers 6a and 6b may be separately formed and joined, or may be integrally formed. This step is self-evident and illustration is omitted. Next, with the reinforcing member 6 as a core, the outside thereof is integrally molded into a predetermined shape with the powder 7 of the material of the coil-shaped conductive member 2 or the material of the contact 1 (FIG. 2).
(a)). Further, the integrally molded product is sintered (Fig. 2
(b)). Since the surface of the sintered product may have irregularities, it is uniformly machined.

Further, a second embodiment of a method of manufacturing the vertical magnetic field electrode of the vacuum valve shown in FIG. 1 will be described with reference to FIG.
In FIG. 3, as in the first embodiment, the reinforcing member 6
Is previously made of an insulating material or a material having a higher resistance than the material of the coil-shaped conductive member 2 or the material of the contact 1,
It is formed in the shape shown in FIG. Next, the reinforcing member 6 is inserted into the vacuum hot press molds 8, 9 and 10 and held at a predetermined position, and the powder 7 of the material of the coil-shaped conductive member 2 or the material of the contact 1 is injected (FIG. 3 (a)). .. Further, the vacuum punch press type upper punch rod 8 and the lower punch rod 9 are driven,
The powder 7 is heated and pressed to be molded into a predetermined shape (Fig. 3
(b)).

Further, a third embodiment of the method of manufacturing the vertical magnetic field electrode of the vacuum valve shown in FIG. 1 will be described with reference to FIG.
In FIG. 4, similarly to the first embodiment, the reinforcing member 6
Is previously made of an insulating material or a material having a higher resistance than the material of the coil-shaped conductive member 2 or the material of the contact 1,
It is formed in the shape shown in FIG. Next, the reinforcing member 6 is used as a core, and the outside thereof is integrally molded into a predetermined shape with the powder 7 of the refractory component (skeleton) of the contact material (FIG. 4 (a)). Further, the integrally molded product is put into the crucible 12, and the conductive component 11 of the contact material is infiltrated into the portion of the refractory component 7 of the contact material (FIG. 4 (b)). By removing the remaining conductive component 13, substantially the same as the vertical magnetic field electrode of the vacuum valve shown in FIG. 1 is completed.

Further, a third embodiment of the method of manufacturing the vertical magnetic field electrode of the vacuum valve shown in FIG. 1 will be described with reference to FIG.
In FIG. 4, similarly to the first embodiment, the reinforcing member 6
Is previously made of an insulating material or a material having a higher resistance than the material of the coil-shaped conductive member 2 or the material of the contact 1,
It is formed in the shape shown in FIG. Crucible for reinforcing member 6
12 is held at a predetermined position, and a melted material 14 of the material of the coil-shaped conductive member 2 or the material of the contact 1 is poured (FIG. 5A).
After cooling, the solidified product is taken out (Fig. 5 (b)). Since the solidified product has irregularities on the surface, it is finished uniformly by machining.

In each of the above embodiments, the coil-shaped conductive member 2 is used.
I explained that the coil part of 1/4 turn,
The same applies to the number of turns other than this. Further, although the contact 1 has a disk-like shape, it may have a slit from the circumferential portion toward the center. Further, in each of the above embodiments, the reinforcing member is provided in all the gaps in the coil portion, but the reinforcing member may be provided only in a part of the gap in the coil portion, particularly in a portion having a weak mechanical strength.

[0014]

As described above, in the longitudinal magnetic field electrode of the vacuum valve according to the present invention, since the reinforcing member 6 is provided in the gap portion of the coil which is the conventional space, the mechanical strength of the electrode is improved. Have. Further, depending on the method for manufacturing the vertical magnetic field electrode of the vacuum valve according to each invention, the material of the coil-shaped conductive member 2 or the material of the contact 1 is integrally molded around the reinforcing member 6 as a core, which facilitates the manufacture. Has the effect of becoming.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a vertical magnetic field electrode of a vacuum valve according to the present invention.

FIG. 2 is a sectional view showing a first embodiment of a method of manufacturing a vertical magnetic field electrode of a vacuum valve according to the present invention.

FIG. 3 is a sectional view showing a second embodiment of a method for manufacturing a vertical magnetic field electrode of a vacuum valve according to the present invention.

FIG. 4 is a sectional view showing a third embodiment of a method for manufacturing a vertical magnetic field electrode for a vacuum valve according to the present invention.

FIG. 5 is a sectional view showing a fourth embodiment of a method of manufacturing a vertical magnetic field electrode for a vacuum valve according to the present invention.

FIG. 6 is a perspective view showing a configuration of a vertical magnetic field electrode of a conventional vacuum valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 contact point 2 coiled conductive member 2a convex joint part 2b coil part 2c spoke part 2d connection part 3 electrode rod 6 reinforcing member 6a first layer 6b second layer 6c notch 6d groove

Claims (5)

[Claims] 1. A flat contact, an electrode rod whose axis is in a direction perpendicular to the flat portion of the contact, and a vertical electrode provided between the contact and the electrode rod and perpendicular to a back surface of the contact. At least one convex joint electrically and mechanically connected in different directions, a coil portion connected to the convex joint and parallel to the back surface of the contact, and the coil portion and the electrode rod are electrically connected. A coil-shaped conductive member having a connection portion for mechanically and mechanically connecting, and provided between the contact and the coil-shaped conductive member, and facing the back surface of the contact and the back surface of the coil-shaped conductive member. And a reinforcing member made of a material having a resistance higher than that of the material of the coil-shaped conductive member or the material of the contact, which is in mechanical contact with the surface of the vertical magnetic field electrode of the vacuum valve. 2. A flat plate-shaped first layer having at least one cutout portion, and a groove formed in a predetermined coil shape and connected to the cutout on one surface of the first layer. A step of molding the reinforcing member having the formed second layer with an insulating material or a material having a resistance higher than that of the material of the coil-shaped conductive member or the material of the contact; A method of manufacturing a vertical magnetic field electrode of a vacuum valve, comprising: integrally molding a powder of a material of a coil-shaped conductive member or a material of a contact into a predetermined shape; and sintering the integrally molded material. 3. A flat plate-shaped first layer having at least one notch, and a groove formed in a predetermined coil shape and connected to the notch on one surface of the first layer. A step of molding the reinforcing member having the formed second layer with an insulating material or a material having a resistance higher than that of the material of the coil-shaped conductive member or the material of the contact; and inserting the reinforcing member into a vacuum hot press mold to give a predetermined A step of holding at a position, a step of injecting powder of a material of a coil-shaped conductive member or a material of a contact into the vacuum hot-press mold, and heat-pressing the powder, and a method for manufacturing a vertical magnetic field electrode of a vacuum valve. 4. A flat plate-shaped first layer having at least one notch portion, and a groove formed in a predetermined coil shape and connected to the notch on one surface of the first layer. A step of molding the reinforcing member having the formed second layer with an insulating material or a material having a resistance higher than that of the material of the coil-shaped conductive member or the material of the contact; A step of integrally molding the powder of the refractory component of the material into a predetermined shape, and infiltrating a conductive component of the contact material into a portion of the refractory component of the material of the contact, .. 5. A flat plate-shaped first layer having at least one notch portion, and a groove formed in a predetermined coil shape and connected to the notch on one surface of the first layer. A step of molding the reinforcing member having the formed second layer with an insulating material, or a material having a resistance higher than that of the material of the coil-shaped conductive member or the material of the contact; and the reinforcing member at a predetermined position of a predetermined mold. A method of manufacturing a vertical magnetic field electrode for a vacuum valve, comprising: holding the material; and pouring a melted material of the material of the coil-shaped conductive member or the material of the contact into the mold.