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Vacuum bulb

A technology of vacuum valve and vacuum container, applied in the direction of high-voltage air circuit breaker, electrical components, electric switches, etc., can solve the problems of arc inability to disperse, restrict the cutting performance, etc., and achieve the effect of improving the cutting performance and improving the uniformity

Active Publication Date: 2014-11-05
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in the vacuum valves shown in Patent Document 1 and Patent Document 2, there is a problem that the coil is provided only on the outer peripheral portion of the arc electrode or the contact (corresponding to the contact in this application, hereinafter referred to as the contact), and the resulting The magnetic field is not necessarily uniformly formed throughout the joint, and the generated arc cannot be fully dispersed throughout the joint, thereby restricting the cutting performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] figure 1 It is a side view of the movable electrode and the fixed electrode of the vacuum valve in Embodiment 1. figure 2 is the structure diagram of the movable electrode, figure 2 (a) is an exploded perspective view of the movable electrode, figure 2 (b) is a plan view of a coil electrode. also, image 3 is a diagram showing the magnetic field distribution in the circumferential direction generated by the coil electrodes.

[0030] Such as figure 1 As shown, the vacuum valve is composed of a pair of electrodes, the movable electrode 1 and the fixed electrode 11, which are accommodated in a vacuum container kept in a vacuum. However, since they have the same structure, only the movable electrode 1 is used here. The structure is explained. exist figure 2 Among them, symbol 1 is a movable electrode, which includes: a contact point 2; a cup-shaped outer peripheral coil electrode 3 and an inner peripheral coil electrode 4 that are connected to the contact point 2...

Embodiment approach 2

[0042] Figure 5 It is an exploded perspective view showing the structure of the movable electrode of the vacuum valve in the second embodiment.

[0043] exist Figure 5 Among them, symbol 21 is a movable electrode, which includes: a contact point 22; a cup-shaped outer peripheral coil electrode 23 and an inner peripheral coil electrode 24 that are connected to the contact point 22 and arranged in a concentric circle; Circumferential coil electrode 24 is connected, the electrode bar 25 that draws electric current to the outside of vacuum container (not shown); Reinforcing member 26 that strengthens joint 22; insulating ring 27.

[0044] The outer peripheral coil electrode 23 includes a coil portion 23d that forms an arc-shaped current conduction path in the circumferential direction due to the slit 23b provided on the cup-shaped side surface 23a obliquely with respect to the axial direction 21a of the movable electrode 21. a terminal portion 23e connected to the contact poi...

Embodiment approach 3

[0053] Figure 7 is the structure diagram of the movable electrode, Figure 7 (a) is an exploded perspective view of the movable electrode, Figure 7 (b) is a plan view of a coil electrode. also, Figure 8 is a diagram showing the magnetic field distribution in the radial direction generated by the coil electrodes.

[0054] Such as Figure 7 As shown, in the vacuum valve according to Embodiment 3, except for the point that the gap d is provided between the cup-shaped outer peripheral coil electrode 3 and the inner peripheral coil electrode 4 arranged concentrically, and the point that the insulating ring 7 is omitted, it is the same as Embodiment 1 figure 1 are the same, and therefore descriptions of other constituent elements are omitted.

[0055] Here, the position of the coil portion 3d serving as the conduction path of the outer circumferential coil electrode 3 and the position of the coil portion 4d serving as the conduction route of the inner circumferential coil e...

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Abstract

Disclosed is a vacuum bulb having a pair of electrodes which are detachably stored in a vacuum container, wherein a movable electrode (1) is comprised of an outer peripheral coil electrode (3) and an inner peripheral coil electrode (4), which are coaxially arranged, and are respectively divided by slits (3b), (4b). The outer peripheral coil electrode (3) and the inner peripheral coil electrode (4) are respectively connected to spoke portions (3c), (4c), each of which extends in radial directions from a cup-shaped bottom portion toward the outer periphery. The outer peripheral coil electrode (3) and the inner peripheral coil electrode (4) respectively have coil portions (3d), (4d), in which an arciform conducting path is formed in the circumferential direction. One end of the outer peripheral coil electrode (3) and the inner peripheral coil electrode (4) is connected to an electrode rod (5) which discharges electric current to the outside of the vacuum container, and the other end is connected to a contact point (2), so that a magnetic field occurring when the contact point (2) is detached is equalized, and the arc is dispersed. Thus, the interruption performance is improved.

Description

technical field [0001] The present invention relates to a vacuum valve used in a vacuum circuit breaker, which has opening and closing contacts and can improve the breaking performance. Background technique [0002] The vacuum valve includes: a cylindrical vacuum container made of an insulator such as ceramic or glass material, and kept airtight under high vacuum; The two ends of the container can be contacted and separated; and the cylindrical arc shield is arranged in the vacuum container and surrounds these electrodes. The function of the vacuum valve is to eliminate the arc generated between the electrodes as the electrodes are separated when the current is cut off. [0003] However, if the arc continues locally, the electrode will be locally melted and the electrode will be damaged. In order to avoid such problems, the following proposals are proposed: interpose the coil, and use the longitudinal magnetic field generated by the coil to spread the arc generated when th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/66
CPCH01H33/664H01H33/66
Inventor 川田将司糸谷孝行
Owner MITSUBISHI ELECTRIC CORP