JP5210816B2 - Vacuum valve - Google Patents

Description

  The present invention relates to a vacuum valve having a pair of contactable and detachable contacts that can improve assembly workability of contacts.

Conventionally, this type of vacuum valve is provided with a disk-shaped contact at the opening of a cup-shaped electrode that generates a longitudinal magnetic field. And between the bottom part of the opening part of an electrode and a contact, the reinforcement member whose electrical resistance is higher than an electrode is provided, and the contact is supported and fixed mechanically (for example, refer patent document 1).
JP 2006-164912 A (Pages 4-5, FIG. 2)

  The above-described conventional vacuum valve has the following problems. The bottom of the opening and one end of the reinforcing member, and the other end of the contact and the reinforcing member are fixed by brazing, but the contact, electrode, and reinforcing member are attached during transportation before joining or melting of the brazing material. Misalignment may occur.

  If a displacement occurs between the contact and the electrode in the radial direction or circumferential direction, the magnetic force of the longitudinal magnetic field decreases, the contact resistance increases, the current-carrying area decreases, etc., which degrades the breaking characteristics and voltage resistance characteristics. Sometimes. For this reason, there has been a demand for a vacuum valve capable of fixing the contact and the electrode at a predetermined position and exhibiting excellent interruption characteristics.

  The present invention has been made to solve the above problems, and an object thereof is to provide a vacuum valve using a reinforcing member capable of fixing a contact and an electrode at a predetermined position.

To achieve the above object, the vacuum valve of the present invention is fixed and a cup-shaped electrode having a plurality of electrode-side slit transverse to the axial direction at an angle to the periphery, the opening of the electrode Rutotomoni, more contact with a disc-shaped contacts having a contact side slit of this, the electrode-side reinforcing member which is secured to the bottom of the opening, and a contact-side reinforcing member which is secured to the contact surface facing the bottom A vacuum valve having a pair of separable contacts, wherein the contact-side reinforcing member is provided with a polygonal convex portion, and the electrode-side reinforcing member is provided with a polygonal hollow portion into which the convex portion is fitted , and the electrode The convex portion is fitted into and fixed to the hollow portion so that the side slit and the contact side slit are connected to each other.

  According to the present invention, the contact-side reinforcing member fixed to the contact is provided with a convex portion, the electrode-side reinforcing member fixed to the electrode is provided with a hollow portion, and the convex portion is fitted into the hollow portion and brazed. Therefore, the contact and the electrode can be fixed at a predetermined position, and a vacuum valve exhibiting excellent interruption characteristics and withstand voltage characteristics can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a vacuum valve according to Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view illustrating the configuration of the contact of the vacuum valve according to the first embodiment of the present invention, and FIG. 2 is a top view illustrating the configuration of the contact of the vacuum valve according to the first embodiment of the present invention. In addition, it demonstrates using one contact among a pair of contacts which can contact / separate freely.

  As shown in FIG. 1, the outer side of the bottom of a cup-shaped electrode 2 made of a copper alloy is fixed to the end of the current-carrying shaft 1 by brazing. A disk-shaped contact 3 made of a copper alloy is fixed to the opening of the electrode 2 by brazing.

  A disk portion 4b of the disk-shaped contact-side reinforcing member 4 having a convex portion 4a at the center is formed on the concave portion 3a of the contact 3 facing the energizing shaft 1, that is, the surface of the contact 3 facing the bottom of the electrode 2. It is firmly attached. A recess 2a is provided at the bottom of the opening of the electrode 2, and the outer periphery of the cylindrical electrode side reinforcing member 5 having the hollow portion 5a is fixed to the recess 2a by brazing. Moreover, the convex part 4a is engage | inserted by the hollow part 5a, and is fixed by brazing. The reinforcing members 4 and 5 are made of stainless steel having a higher electrical resistance than the electrode 2.

  A plurality of electrode-side slits 6 are provided on the outer periphery of the electrode 2 so as to obliquely cross the axial direction as indicated by a two-dot chain line. The electrode-side slit 6 causes a current flow in the circumferential direction to generate a longitudinal magnetic field.

  Here, as shown in FIG. 2, the convex portion 4a of the contact side reinforcing member 4 and the hollow portion 5a of the electrode side reinforcing member 5 are hexagonal and are hollower than the outer shape of the convex portion 4a. The inner shape of the part 5a is slightly larger and is fitted. The contact 3 is provided with a contact side slit 7 connected to the electrode side slit 6.

  Next, a method for fixing the electrode 2 and the contact 3 will be described. First, the concave portion 2a of the electrode 2 and the electrode side reinforcing member 5 and the concave portion 3a of the contact 3 and the contact side reinforcing member 4 are fixed. Accordingly, the electrode-side reinforcing member 5 can be positioned by fitting into the recess 2a, and the contact-side reinforcing member 4 can be positioned by fitting into the recess 3a. Next, the convex portion 4a is fitted into the hollow portion 5a and fixed. The reinforcing members 4 and 5 are fixed in advance so that the radial direction and the circumferential direction of the electrode 2 and the contact 3 coincide with each other in the angle and position of the convex portion 4a and the hollow portion 5a. In addition, you may adhere these recessed parts 2a, the electrode side reinforcement member 5, the recessed part 3a, the contact side reinforcement member 4, the convex part 4a, and the hollow part 5a simultaneously.

  Accordingly, the contact 3 and the electrode 2 can be fixed at a predetermined position without causing a positional shift in the radial direction or the circumferential direction. In particular, by fitting the convex portion 4a into the hollow portion 5a, alignment between the electrode side slit 6 and the contact side slit 7 is facilitated, workability is improved, and a high longitudinal magnetic field can be generated. Further, the end of the contact 3 does not protrude from the outer peripheral surface of the electrode 2, and the electric field distribution becomes good and the withstand voltage characteristic can be improved.

  According to the vacuum valve of the first embodiment, the contact side reinforcing member 4 is provided with the convex portion 4a, and the convex portion 4a is fitted into the hollow portion 5a of the electrode side reinforcing member 5 provided on the electrode 2 and brazed. Therefore, the contact 3 and the electrode 2 can be fixed at a predetermined position, and a vacuum valve that exhibits excellent breaking characteristics and withstand voltage characteristics can be obtained.

  In addition, although the convex part 4a and the hollow part 5a were demonstrated in the said Example 1 by hexagonal shape, positioning in the circumferential direction can be performed also as polygonal shape more than triangular shape and elliptical shape. In particular, in the case where the electrode side slit 6 and the contact side slit 7 are provided, the slits 6 and 7 can be reliably connected to each other, and a large magnetic force can be generated.

  Further, in the case where there is no slit 6 or 7 and positioning in the circumferential direction is unnecessary, if the convex portion 4a and the hollow portion 5a are circular, positioning in the radial direction can be performed, and withstand voltage characteristics and the like can be improved. Can be improved.

  Next, a vacuum valve according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view illustrating the configuration of the contact of the vacuum valve according to the second embodiment of the present invention. The difference between the second embodiment and the first embodiment is the shape of the convex portion. In FIG. 3, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In addition, it demonstrates using one contact among a pair of contacts which can contact / separate freely.

  As shown in FIG. 3, the convex portion 4a of the contact side reinforcing member 4 is provided with a tapered portion 4c having a tip smaller than the bottom.

  According to the vacuum valve of the second embodiment, in addition to the effects of the first embodiment, the convex portion 4a can be easily fitted into the hollow portion 5a, and the assembling work can be facilitated.

Sectional drawing which shows the structure of the contact of the vacuum valve which concerns on Example 1 of this invention. The top view which shows the structure of the contact of the vacuum valve which concerns on Example 1 of this invention. Sectional drawing which shows the structure of the contact of the vacuum valve which concerns on Example 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Current supply axis | shaft 2 Electrode 2a, 3a Recessed part 3 Contact point 4 Contact side reinforcement member 4a Convex part 4b Disk part 4c Tapered part 5 Electrode side reinforcement member 5a Hollow part 6 Electrode side slit 7 Contact side slit

Claims (1)

A cup-shaped electrode provided with a plurality of electrode-side slits that obliquely cross the axial direction on the outer periphery ;
Rutotomoni is fixed to the opening of the electrode, a disc-shaped contact having a contact side slits of a plurality of,
An electrode-side reinforcing member fixed to the bottom of the opening;
A vacuum valve having a pair of contacts of the universal separable having a contact side reinforcing member which is secured to the contact surface facing the bottom portion,
A polygonal convex portion is provided on the contact side reinforcing member,
Provide a polygonal hollow portion into which the convex portion is fitted into the electrode side reinforcing member,
The vacuum valve , wherein the convex portion is fitted and fixed to the hollow portion so that the electrode side slit and the contact side slit are connected to each other .

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