JP4425031B2 - Switchgear - Google Patents

Description

  The present invention relates to a switchgear, and more particularly to a switchgear having a plurality of main circuit opening / closing parts.

  A plurality of main circuit switching parts that connect and separate the bus terminal and load side terminals and a plurality of load side conductors connected to the main circuit switching parts are housed in a cylindrical insulator made up of a metal container and a ceramic cylinder. With regard to the switchgear, in the prior art, each of the plurality of load-side conductors is surrounded by a cylindrical insulator made of a ceramic cylinder so as to be airtight (see, for example, Patent Document 1).

JP 2000-268685 A

  When a ceramic cylinder is to be joined to the lid of a metal container, a sealing material is required to alleviate the thermal strain caused by the difference in thermal expansion coefficient, and at the same time to maintain airtightness, and the ceramic metallized part is placed near the conductor. Therefore, it is necessary to take measures for electric field relaxation. In the conventional technology, it is necessary to perform such sealing processing and electric field relaxation processing for each of the plurality of load-side conductors, which increases the number of components. There is a problem that reliability is reduced due to the large size and becomes large and expensive.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a switchgear that has a simple configuration and can improve reliability.

In the switchgear according to the present invention, a plurality of terminal members that are electrically connected to a plurality of opening / closing parts, respectively, and a plurality of the terminal members that are individually surrounded to insulate each of the terminal members A cylindrical portion, a conductive container having a common opening for the plurality of terminal members that lead out the plurality of terminal members, and housing the plurality of opening / closing portions, and a lid for closing the openings The insulating cylinder portion and the lid are each formed of a solid insulating member, and the insulating cylinder portion and the lid formed of a solid insulating member are integrated to insulate the plurality of terminal members, respectively. And an integrally molded product that closes the opening of the conductive container, and the edge of the lid integrated with the insulating cylinder part joined to the conductive container is protruded toward the conductive container. Things .

According to this invention, each of the insulating cylinder portion for insulating the terminal member and the lid for closing the opening of the conductive container are each constituted by the solid insulating member, and the above-mentioned solid insulating member is used. An insulating cylinder portion and the lid are integrated to form an integrally molded product that insulates the plurality of terminal members and closes the opening of the conductive container; and the insulating cylinder portion that is joined to the conductive container; By projecting the edge of the integrated lid toward the conductive container, the reliability can be improved with a simple structure, and the metallization process for the edge of the lid joined to the conductive container, etc. It is possible to obtain a switchgear that can easily perform the joining strengthening process .

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIG. FIG. 1A is a top view showing a configuration in the first embodiment. FIG. 1B is a side sectional view showing the configuration in the first embodiment.

In FIG. 1, a plurality of main circuit fixed side terminals 1 are each provided with a main circuit fixed side contact 2, and an arc shield 3 is provided surrounding the main circuit fixed side contact 2. A main circuit movable side contact 4 is provided opposite to the main circuit fixed side contact 2, and the plurality of main circuit movable side contacts 4 are electrically connected to each other by a main circuit flexible conductor 5.
The main circuit movable side contact 4 is opened and closed with respect to the main circuit fixed side contact 2 by the main circuit movable side rod via the insulating rod 6. Electric field relaxation shields 7 are provided at both ends of the insulating rod 6.
The ground movable side rod 9 drives the ground movable side contactor 10 to perform contact and separation operations with respect to the ground fixed side contactor 11. An arm 17 is provided on the grounding fixed contact 11.
The metal container 14 constitutes a box-like body having an open lower surface for commonly storing a plurality of main circuit opening / closing sections composed of the main circuit fixed side contact 2 and the main circuit movable side contact 4. Forms a common opening in the plurality of main circuit fixed side terminals 1 from which the plurality of main circuit fixed side terminals 1 are derived.
An integrated ceramic member 13 in which the insulating cylinder portion S and the lid C are integrally formed of a ceramic member is disposed on the lower surface of the metal container 14, and the insulating cylinder portion S of the integrated ceramic member 13 is a main circuit fixed side terminal. The lid C of the integrated ceramic member 13 is disposed so as to close the opening provided on the lower surface of the metal container 14. A sealing plate 12 is provided on the lower end surface of the insulating cylindrical portion S of the integrated ceramic member 13 so as to surround each of the main circuit fixed side terminals 1.

Conventionally, it is necessary to reduce the thermal stress generated from the difference between the thermal expansion coefficients of the ceramic and the metal and the electric field strength of the ceramic metallized part at the connection part between the insulating cylinder and the vacuum vessel, resulting in a complicated structure. It was large, expensive.
As shown in FIG. 1, a simple structure can be realized by joining the ceramic cylinder and the lower part of the metal container to the vacuum ceramic container 14 with the integrated ceramic 13.

In the first embodiment, a plurality of main circuit opening / closing sections that connect and separate the bus-side terminal and the load-side terminal, a conductor that connects the load-side conductor, and a load-side terminal or a power-side terminal and the ground conductor are connected and separated. In a vacuum valve in which a ground opening / closing part is housed in a ceramic cylinder and a metal container, a switchgear is proposed in which one lid of the container and the ceramic cylinder are integrated with ceramic.
In the first embodiment, such a configuration provides a small, low-cost, and highly reliable switchgear.

  According to the first embodiment of the present invention, a plurality of main circuit fixed side terminals that are electrically connected to a plurality of main circuit opening / closing sections each including the main circuit fixed side contact 2 and the main circuit movable side contact 4 are provided. An insulating tube portion S for individually enclosing each of the terminal members consisting of the main circuit fixing side terminals 1 by individually enclosing each of the terminal members consisting of the main circuit fixing side terminals 1 provided separately; The main circuit fixing side contact 2 having a common opening P in the terminal member consisting of the plurality of main circuit fixing side terminals 1 that leads out the terminal member consisting of the plurality of main circuit fixing side terminals 1 provided. And a conductive container made of a metal container 14 that houses a plurality of main circuit opening / closing parts made of the main circuit movable contact 4, and a lid C for closing the opening P of the conductive container made of the metal container 14. With Since the insulating cylinder portion S and the lid body C are integrally formed as an integral ceramic 13 with a solid insulating member, the insulating cylinder portion for insulating the terminal member and the lid for closing the opening of the conductive container, respectively. By integrally molding the body with the solid insulating member, it is possible to obtain a switch gear that has a simple configuration and can improve reliability.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a top view and a side sectional view showing the configuration of the second embodiment.
In the second embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configuration in the first embodiment described above, and exhibits the same operation. In the drawings, the same reference numerals indicate the same or corresponding parts.

FIG. 2 shows a second embodiment according to the present invention, and is characterized in that a ground circuit is not provided in any of the three poles.
In FIG. 2, the grounding movable side rod 9 and the grounding movable side contactor 10, the grounding fixed side contactor 11, and the arm portion 17 at the c pole are omitted.

  Depending on the circuit in which the switchgear is used, grounding is not always necessary, and if it is not necessary, an inexpensive device can be configured by omitting the installation portion because of its structure. Although only one pole is omitted in FIG. 2, the same effect is obtained when two poles are omitted.

  According to the second embodiment of the present invention, since the ground circuit is not provided in any of the three poles in the configuration in the first embodiment, the configuration can be simplified and the reliability can be improved. By using only essential components, a switchgear that can reduce costs can be obtained.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a side sectional view showing a configuration in the third embodiment.
In the third embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configurations in the first and second embodiments described above and exhibits the same operation. It is. In the drawings, the same reference numerals indicate the same or corresponding parts.

The third embodiment is characterized in that the portion to be joined to the metal container around the edge of the integrated ceramic 13 is made higher than the plane, and the cost due to the ease of metallization and the ease of positioning at the time of joining to the metal container. Has the effect of reducing and improving quality.
In FIG. 3, the edge 15 provided on the integrated ceramic 13 corresponds to a joint portion with the metal container 14, and the joint portion is subjected to metallization processing for strengthening the joint. The edge 15 of the integrated ceramic 13 protrudes toward the metal container 14 with a predetermined protrusion height, and the metallization process can be easily performed for strengthening the bonding.

  According to the third embodiment of the present invention, in the configuration in the first or second embodiment, the lid C integrated with the insulating cylinder portion S joined to the conductive container made of the metal container 14 is provided. Since the edge portion 15 is projected toward the conductive container made of the metal container 14, a switchgear having a simple configuration and improving the reliability and easily performing the joint strengthening process on the conductive container is obtained. Can do.

Embodiment 4 FIG.
A fourth embodiment of the present invention will be described with reference to FIG. FIG. 4 is a side sectional view showing the configuration in the fourth embodiment.
In the fourth embodiment, the configuration other than the specific configuration described here has the same configuration contents as those in the first to third embodiments described above, and has the same operation. Is. In the drawings, the same reference numerals indicate the same or corresponding parts.

  In FIG. 4 showing the configuration of the fourth embodiment according to the present invention, a pedestal 16 for receiving an operating force from the movable rod when the grounding circuit is opened and closed is provided on the integrated ceramic 13 below the grounding fixed contactor 11. Thus, the arm 18 of the grounding fixed contact can be made thin.

  In a fourth embodiment of the present invention, there is provided a switchgear characterized in that, in the configuration of the first to third embodiments, an impact at the time of opening / closing the ground opening / closing portion is received by a base 16 provided on the integrated ceramic 13. Proposed.

  Further, if metallization is performed on the joint surface of the pedestal 16, the structural reliability is improved because it is joined to the arm portion 18 of the ground fixed contact, but the height of the pedestal 16 and the height of the edge 15 of the integrated ceramic are increased. If it is made the same, metallization can be easily performed and an integrated ceramic can be manufactured at low cost.

  According to Embodiment 4 of the present invention, in any of the configurations from Embodiment 1 to Embodiment 4, the ground opening / closing portion having the ground fixed side contact provided on the second terminal member is Since the pedestal that is housed in the conductive container and receives an impact on the grounding fixed contact by the opening / closing operation of the grounding opening / closing part is provided on the lid body integrally formed with the insulating cylinder part and the solid insulating member, It is possible to obtain a switchgear that has a simple configuration and can improve reliability and can reduce the impact during the opening / closing operation of the ground opening / closing part.

  According to Embodiment 4 of the present invention, in the configuration of the preceding paragraph, the protruding height of the pedestal to the conductive container is the same as the protruding height of the edge of the lid to the conductive container. Since it did in this way, while having a simple structure and improving reliability, the switchgear which can perform the joint reinforcement | strengthening process of a base and a cover body edge part easily can be obtained.

Embodiment 5 FIG.
A fifth embodiment of the present invention will be described with reference to FIG. FIG. 5A is a top view showing the configuration in the fifth embodiment. FIG. 5B is a side sectional view showing the configuration in the fifth embodiment.
In the fifth embodiment, the configuration other than the specific configuration described here has the same configuration contents as those in the first to fourth embodiments described above, and exhibits the same operation. Is. In the drawings, the same reference numerals indicate the same or corresponding parts.

In the description from the first embodiment to the fourth embodiment, the three poles have been described. However, the same effect can be obtained even when applied to more than three poles.
In FIG. 5 showing the configuration of the fifth embodiment according to the present invention, a configuration having a multipole number n exceeding three poles is shown.

  According to the fifth embodiment of the present invention, since any one of the configurations from the first to fourth embodiments has a multipole configuration exceeding three poles, it has a simple configuration and has high reliability. A switchgear having a multipolar configuration exceeding three poles can be obtained.

Embodiment 6 FIG.
A sixth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a side sectional view showing a configuration in the sixth embodiment.
In the sixth embodiment, the configuration other than the specific configuration described here has the same configuration contents as those in the first to fifth embodiments described above, and exhibits the same operation. Is. In the drawings, the same reference numerals indicate the same or corresponding parts.

  FIG. 6 shows a tapered ceramic 19 having a tapered portion 19a on the outer periphery so that it can be cable-connected to the insulating cylinder portion.

  In the sixth embodiment of the present invention, the switchgear according to any one of the first to sixth embodiments is characterized in that a taper (inclination) or a step is provided so that a cable can be connected to the ceramic cylinder. Has been proposed.

  According to the sixth embodiment of the present invention, in any of the configurations from the first to sixth embodiments, a tapered portion having a reduced outer diameter for connecting a cable to the insulating cylinder portion S of the integrated ceramic 13. Since the reduced diameter portion for connecting the cable made of the ceramic 19 with the taper formed with T or a step is provided, it is possible to obtain a switch gear capable of cable connection that has a simple configuration and can improve reliability.

It is the upper side figure and side sectional view which show the structure in Embodiment 1 concerning this invention. It is the upper side figure and side sectional view which show the structure in Embodiment 2 concerning this invention. It is a sectional side view which shows the structure in Embodiment 3 concerning this invention. It is the upper side figure and side sectional view which show the structure in Embodiment 4 and Embodiment 5 concerning this invention. It is the upper side figure and side sectional view which show the structure in Embodiment 5 concerning this invention. It is a sectional side view which shows the structure in Embodiment 6 concerning this invention.

Explanation of symbols

1 main circuit fixed side terminal, 2 main circuit fixed side contact, 3 arc shield, 4 main circuit movable side contact, 5 main circuit flexible conductor, 6 insulating rod, 7 electric field relaxation shield, 8 Main circuit movable side rod, 9 Ground movable side rod, 10 Ground movable side contact, 11 Ground fixed side contact, 12 Sealing plate, 13 Integrated ceramic, 14 Metal container, 15 Edge of integrated ceramic, 16 Integrated Ceramic ceramic base, 17, 18 Arm of fixed contact on ground side, 19 Taper ceramic.

Claims (4)

A plurality of terminal members that are electrically connected to a plurality of opening / closing portions, respectively, a plurality of terminal members that individually surround each of the terminal members that are provided, and a plurality of insulating tube portions that insulate each of the terminal members. A conductive container having an opening common to the plurality of terminal members provided to lead out the terminal member and housing the plurality of opening and closing parts; a lid for closing the opening; and the insulating cylinder part; Each of the lids is formed of a solid insulating member, and the insulating cylindrical portion formed of a solid insulating member and the lid are integrated to insulate the terminal members, respectively, and the opening of the conductive container A switchgear characterized in that an edge part of a lid integrated with the insulating cylinder part joined to the conductive container is protruded toward the conductive container . A grounding opening / closing part having a grounding fixed contact provided on the terminal member is housed in the conductive container, and a base that receives an impact on the grounding fixed contact due to the opening / closing operation of the grounding opening / closing part The switchgear according to claim 1 , wherein the switchgear is provided on the lid body formed integrally with the portion and the solid insulating member. 3. The switchgear according to claim 2, wherein a protruding height of the pedestal to the conductive container is the same as a protruding height of the edge of the lid to the conductive container. The switchgear according to any one of claims 1 to 3 , wherein a reduced diameter portion for cable connection with a reduced outer diameter is provided to connect a cable to the insulating cylinder portion.

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