JPS60150519A - Vacuum bulb - 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] [Technical field of invention] The present invention relates to a true full valve (1).

[Technical background of the invention and its problems]

Conventional vacuum pulp has an insulating cylinder 1 as shown in Figure 1 (-).
A fixed flange 12 and a seal ring 3 are attached to both ends of the
The movable flange 13 is made to withstand pressure so that the inside is evacuated to a pressure of 10 torr or less (secondarily, a vacuum vessel is formed).

The fixed magnetic pole 13 passes through the fixed 7 shaft 12 in an airtight manner.
Two pairs of movable magnetic poles can be connected to and separated from each other (two pairs of movable magnetic poles are fixed to the town movable pole shaft 21. , it is possible to connect and separate the fixed magnetic pole 13 with the vacuum while maintaining the vacuum.Inside the Makabe container, there is an insulating cylinder 1.
The arc shield 2 is fixed to the inner surface using an arc shield support 4. The bellows 5 (= is a bellows cover made of 24-karat gold. The constant-gauge joint 3 and the moving magnetic pole B have the same shape as the bellows 5. The front view is shown in Figure 2 and the cross-sectional view is shown in Figure 3. The coil Ii 433 is composed of a contact 1 reinforcement 31, a magnetic pole 32, a coil magnetic pole 33, and a reinforcement 34. The coil Ii 433 is shown divided into four parts, and the magnetic pole 32 has a slit cut therein. In the normal case, fixed magnetic pole 1
3 and the opposing machining electrodes are in contact with each other, and a pressure contact is applied by an external drive mechanism (not shown).When interrupting the magnetic flow, the external drive mechanism moves the The fixed magnetic pole 13 and the movable electrode n are separated by driving the magnetic pole 23. An arc is generated between the special electrodes, but the arc is cut off at the current zero point.
Because it flows through L33, a magnetic field parallel to the arc is generated. The effect of this magnetic field stabilizes the arc and improves the breaking performance. There are other ways to improve shearing performance.
Various methods have been considered, such as applying two magnetic fields in two perpendicular directions to drive the arc, but the best method is to apply a parallel magnetic field to the arc as described above.

In addition, the breaking performance varies greatly depending on the material of the contact 31.The contact 31 must satisfy various performance fc.As a material, it has high breaking performance, high dielectric strength, The melting force and shearing magnetic current are small, etc. Contact materials that completely satisfy C2 such performance have not yet been created, and various types of contact materials are currently in use.Among them, Cu and Cr alloy is one of the materials that exhibits excellent performance.This contact is generally manufactured by impregnating 20 μm of sintered Cr. (Secondly, a method of impregnating Cu in a vacuum has been used.

Furthermore, in order to maintain the degree of vacuum within the vacuum vessel (2) a getter is used to keep the gas within each vessel in check.

Assembling the vacuum valve (Secondly, it takes time. In the assembly, the valley part (Secondly, to release the additional gas), there is a method of heating several times in a vacuum. This method Since it takes a very long time to completely release the gas into photons, an Hσ getter is attached.

However, since the getter is exposed to air during assembly, a vacuum valve (two valves) must be installed, and the process must be performed after the getter is in a vacuum state, making valve manufacturing extremely complicated. (2) Also, the vacuum valve was made smaller (both of which meant that the publication of Getta's castle had to be done in a very small space, and the manufacturing was required.
There are problems such as a long production time.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum valve that is easy to manufacture and has high reliability without deterioration of the degree of vacuum.

[Summary of the invention]

The present invention uses a Cr layer on the surface of the contact whose main components are Cu and Cr, and after assembling the vacuum valve (by performing two-magnetic current aging (two), it is possible to reduce To provide a Makabe valve with high productivity without vacuum deterioration.

[Embodiments of the invention]

One embodiment of the present invention (two examples will be explained).

The configuration is the same as the conventional one except for the contact 31, so the cost is $2.
A description will be given of the magnetic pole part (two parts) with reference to FIGS.

The magnetizing shaft is provided with a coil magnetic pole 33 (two solders are attached).

The coil electrode 33 is formed of an arm portion extending in the circumferential direction from the magnetization axis and a coil portion having two arcuate C arms bent from the tip of the arm portion. The tip of the coil portion is soldered to an electrode 32 disposed on the front surface of a coil polarizer 33. The magnetic shaft, coil electrode, and magnetic pole are made of a material with low resistance, such as @(2). The reinforcing force 34 constituted by 1 has been corrected.A contact 31 is soldered to the front surface of the center of the electrode.

The contactor 31 is acid-resistant because its main components are Cu and Or.
This is necessary in a structure in which the reduced area is covered with a layer made only of Cr.

After forming the vacuum pulp with the following structure (2), the near arc is ignited and first-rate aging is performed with one or more shifts.

The contact material is a back metal made of Cu and Or.
By increasing the size of two Ail Is, it is possible to create a circuit breaker with excellent breaking capacity, similar to two Ail i series.

In addition, by using Cr as the contactor thorn surface and performing knee flow aging after assembling the A empty pulp (2), the following effects are produced. First, when the contactor material is an alloy consisting of Cu and Cr. Gas in the air adheres to the surface of the contact during assembly of the vacuum valve.This deteriorates the shutoff performance, and unless it is prevented in some way, sufficient shutoff performance cannot be obtained. .Arc (biparallel directions (
If no magnetic field is applied, the arc will ignite on a part of the surface of one pole, and even if forward aging is performed, it will not be completely removed (the gas attached to the surface cannot be completely removed). , Parallel to the arc (= applying a double field (= Therefore, the arc spreads uniformly over the entire surface, so by magnetic current aging the magnetic pole surface (= attached gas and completely C2*p can be removed, and sufficient In addition, it is well known that Or is a material with excellent getter action. Therefore, by forming a Cr layer on the contact surface, Cr is released during magnetic aging. , an excellent getter action is performed. This eliminates the need for a getter, which was conventionally attached inside a vacuum container (= 9), and at the same time achieves a sufficient degree of accuracy in a shorter time than the conventional vacuum processing time. Therefore, it can be manufactured more easily than conventional vacuum pulp.

As mentioned above (=, parallel to the arc (= magnetic pole that applies the magnetic field), it is possible to eliminate the need for getter attachment by forming a gold-Or layer on the contact surface and performing four-stream aging after vacuum pulp assembly. This makes it easier to produce vacuum pulp.

In addition, the contact material r is made of an alloy consisting of Cu and Cr, and the gap between the magnetic pole and the fixed electrode is connected electrically (with a thin type made of 2 Or), and after the vacuum pulp is assembled (2) The seal ring is formed using a magnetic current that is higher than the magnetic current that melts in the bath (the same effect can be obtained by using two methods).

〔Effect of the invention〕

According to the present invention, it is not necessary to attach a getter in a vacuum container, and it is possible to shorten li5 during vacuum processing, and it is possible to provide vacuum pulp that can easily form the back layer of the vacuum pulp. .

[Brief explanation of drawings]

FIG. 1 shows a sectional view of a conventional vacuum pulp, FIG. 2 shows a front view of a magnetic pole, and FIG. 3 shows a sectional view of FIG. 2. 1... Insulating circular surface 2... Arc shield 3... Seal ring 4... Arc shield support 11...
・Fixed energizing shaft 12...Fixed flange 13...Fixed electrode 21...Movable energizing shaft 22...Movable flange
B...Movable electrode scrap...Bellows cover δ...Bellows Atsushi...Guide 31...Contactor 32...Polarization 33...Coil electrode 34...(4
Ii Tsuyoshi (7317) Agent: Patent Attorney Noriyuki Tadayuki (and 1 others)
name) Figure 1

Claims (1)

[Claims] Inside a vacuum container surrounded by an insulating outer cylinder made of ceramic or the like and a metal flange, a fixed magnetic pole and a movable electrode, which are a magnetic pair that can be brought into and out of contact with each other, are arranged, and a (A coil electrode consisting of an arm extending circumferentially from the binary axis and a coil bent in an arc shape from the tip of the arm is arranged.) All pulp A is patented in that vacuum pulp (=) is provided with a contact whose generated components are Cu and Cr, and the surface of the contact is Cr-free.