JP6537378B2 - Vacuum valve and vacuum circuit breaker using the same - Google Patents

Description

  The present invention relates to a vacuum valve and a vacuum circuit breaker using the same.

In a conventional vacuum valve, fixed end plates and movable end plates are respectively joined by brazing to both ends of an insulating cylinder made of alumina ceramic or the like to form a vacuum vessel. The fixed side electrode bar is fixed to the fixed side end plate, and the movable side electrode bar is slidably held by the movable side end plate. The fixed-side electrode and the movable-side electrode are provided on the fixed-side electrode bar and the movable-side electrode bar, respectively. Bellows are joined by brazing between the movable electrode rod and the movable end plate to enable opening and closing while maintaining airtightness. The bellows is made of a thin metal such as stainless steel in a bellows shape. A flat guide mounting plate for fixing a guide for guiding the axial movement of the movable electrode bar is joined to the movable side end plate by brazing, and the guide is fixed to the guide mounting plate by screwing. There is. The guide is made of a synthetic resin or the like, and a part thereof is formed in a cylindrical shape to prevent the rotation of the movable electrode rod and to prevent the twist of the bellows (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 63-94517

  In the conventional vacuum valve as shown in Patent Document 1, the guide is screwed. Therefore, the disc portion of the guide and the guide mounting plate need to have a sufficient thickness to secure the screwing strength, which has been a hindrance to miniaturizing the vacuum valve. In addition, it takes time and effort in screwing work in the screwing process, management of screws, and management of screw torque.

  The present invention has been made to solve the above-described problems, and stably holding a guide for sliding a movable electrode on the vacuum container side without using a screw for fixing the guide. Provides a vacuum valve capable of

The vacuum valve according to the present invention comprises a vacuum vessel having a stationary end plate at one end of an insulating cylinder and a movable side plate at the other end, and a stationary side electrode and a movable side electrode disposed in contact with and separated from inside the vacuum vessel. And one of the movable electrode and the movable electrode rod, one end of which is fixed to the movable electrode and the other end is drawn to the outside of the vacuum vessel to move the movable electrode into and out of contact with the fixed electrode. A guide for guiding the movable electrode rod, which comprises a guide cylinder surrounding the periphery and a guide outer edge provided at one end of the guide cylinder and having a larger diameter than the guide cylinder, and a joint with the movable end plate And a guide attachment member for holding the guide from the outer periphery, and an engagement protrusion formed on the guide outer edge of the guide and protruding radially outward, and the guide attachment member formed with the engagement protrusion and engaged to have a engaging hole, said guide mounting member, before The end surface of the guide cylinder portion is perpendicular to the vertical surface at a position where the engagement projection of the guide is engaged with the engagement hole of the guide mounting member. It abuts on the surface .
Furthermore, the vacuum valve according to the present invention comprises a vacuum vessel having a fixed end plate at one end of the insulating cylinder and a movable side plate at the other end, and a fixed side electrode disposed movable close to and separated inside the vacuum vessel. A movable electrode, one end of which is fixed to the movable electrode, the other is drawn out of the vacuum vessel, and moves linearly to move the movable electrode into and out of contact with the fixed electrode, and the movable electrode A guide for guiding the movable electrode rod, which comprises a guide cylinder surrounding the rod and a guide outer edge provided at one end of the guide cylinder and having a larger diameter than the guide cylinder, a movable end plate And a guide attachment member for holding the guide from the outer periphery, the engagement protrusion formed on the guide outer edge portion of the guide and projecting radially outward, and the engagement protrusion formed on the guide attachment member And the guide mounting portion The inner surface of, and is formed into a shape along the outer surface of the guide tube portion and the outer-edge guide portion of the guide.
Further, the vacuum circuit breaker of the present invention brings the vacuum valve into contact with and separates from the vacuum valve, the fixed side conductor and the movable side conductor respectively connected to the fixed side electrode and the movable side electrode of the vacuum valve. it is obtained by a drive device.

According to the vacuum valve of the present invention, the guide mounting member surrounds the outer side surface of the guide and engages the engagement protrusion provided on the guide outer edge with the engagement hole provided on the guide mounting member. The guide for sliding the movable electrode can be stably held on the vacuum vessel side without using a screw for fixing the guide.
Moreover, it is possible to use the above-mentioned vacuum valve as a component of a vacuum circuit breaker.

It is sectional drawing which shows the vacuum valve concerning Embodiment 1 of this invention. It is a perspective view of the guide of FIG. 1, and a guide attachment member. FIG. 3 (a) is a top view of the guide of FIG. FIG.3 (b) is a top view which shows the modification of the guide of FIG. FIG.3 (c) is an upper side figure which shows another modification of the guide of FIG. It is AA sectional drawing of Fig.3 (a). 1 is a cross-sectional view of a vacuum circuit breaker using a vacuum valve according to an embodiment of the present invention. It is sectional drawing which shows the vacuum valve concerning Embodiment 2 of this invention. It is a perspective view of the guide of FIG. 6, and a guide attachment member. FIG. 7 is a top view of the guide of FIG. 6; It is BB sectional drawing of FIG.

Embodiment 1
Hereinafter, each embodiment of the present invention will be described based on the drawings. The same reference numerals denote the same or corresponding parts between the drawings. The vacuum valve in Embodiment 1 of this invention is demonstrated with reference to FIGS. 1-4.

FIG. 1 is a cross-sectional view of the vacuum valve 100 according to the first embodiment. As shown in FIG. 1, one end of an insulating cylinder 1 made of cylindrical alumina ceramic or the like is closed by a fixed end plate 2 and the other end is closed by a movable end plate 3 to constitute a vacuum vessel. The fixed end plate 2 and the movable side plate 3 are coaxially attached to one end and the other end of the insulating cylinder 1 by brazing, respectively. In this assembly, a silver-based brazing material is mainly used, the fixed side electrode bar 4 is soldered to the fixed side end plate 2 and the movable side electrode bar 5 is soldered to the movable side end plate 3 via the bellows 6. It is joined. Furthermore, in the vacuum vessel, the fixed electrode 7 is joined by brazing to the end of the fixed electrode 4, and the movable electrode 8 is attached to the end of the movable electrode 5 so as to face the fixed electrode 7. It is brazed and joined.
Here, it is assumed that a fixed electrode is configured by the fixed side electrode rod 4 and the fixed side electrode 7, and a movable electrode is configured by the movable side electrode rod 5 and the movable side electrode 8.

  Further, a shield 9 is fixed to the inside of the insulating cylinder 1 so as to surround the fixed side electrode 7 and the movable side electrode 8. The shield 9 prevents the inner surface of the insulating cylinder 1 from being contaminated by metal vapor generated from the fixed electrode 7 and the movable electrode 8 at the time of current interruption. The movable electrode rod 5 is fixed to the movable end plate 3 via the guide 10 and the guide mounting member 20. The guide 10 is a member for guiding the movement of the movable electrode rod 5. The guide attachment member 20 is a member joined to the movable end plate 3 in order to fix the guide 10. Further, at the end of the movable side electrode 8 of the bellows 6, in order to prevent the surface of the bellows 6 from being contaminated by metal vapor generated from the fixed side electrode 7 and the movable side electrode 8 when current is interrupted, The cover 6 a is brazed to the movable electrode bar 5.

Here, although the details will be described later, the vacuum valve 100 of the present invention is characterized by the shapes of the guide 10 and the guide mounting member 20. The guide 10 is a member in which a guide cylindrical portion 11 surrounding the periphery of the movable side electrode rod 5 supporting the movable side electrode 8 and a guide outer edge 12 formed larger in diameter than the guide cylindrical portion 11 are formed in a single line It is. Then, the guide edge portions 12, the engaging projection 12 c for engaging the guide mounting member 20 is provided to protrude radially outward. Furthermore, the guide mounting member 20 is formed to support substantially the entire surface of the side surface portion in the axial direction of the guide 10, and the side surface portion of the cylindrical guide mounting member 20 surrounding the guide 10 An engagement hole 20a which is fitted to 12c is opened. Therefore, by fitting the guide 10 into the guide attachment member 20, the engagement protrusion 12c is engaged with the engagement hole 20a without using a fastening member such as a screw, and the guide 10 is fixed to the guide attachment member 20. be able to.

Next, the operation of the vacuum valve 100 will be described. When the vacuum valve 100 of FIG. 1 is in operation, the fixed electrode 7 and the movable electrode 8 open and close. At this time, the guide 10 for guiding the movable electrode rod 5 aligns the axis of the movable electrode 8 with the fixed electrode 7, withstands the impact force generated at the time of opening and closing by the operation mechanism, and moves the large electrode It is necessary to have a function to slide the movable electrode rod 5 smoothly to withstand the electromagnetic force generated in the rod 5. As a material of the guide 10, a synthetic resin is generally used so that the function as described above can be obtained.
Further, when the vacuum valve 100 is attached to the vacuum circuit breaker, the fixed side electrode rod 4 is fixed to the vacuum circuit breaker by a bolt or the like (not shown) and the movable side electrode rod 5 is connected to the operation mechanism of the vacuum circuit breaker. Ru.

  Since the present invention relates to the attachment of the guide 10, the attachment will be described in detail below. As FIG. 2 shows a perspective view of the guide 10 and the guide mounting member 20 that engages the guide 10, the guide 10 guides the movement of the movable electrode rod 5 in the axial direction. A guide outer edge having a larger diameter than the guide cylindrical portion 11 having a guide cylindrical portion 11 having an inner diameter slightly larger than the diameter of 5 and an engagement protrusion 12c engaged with the engagement hole 20a of the guide mounting member 20 It is mainly configured by the part 12. The inner surface of the guide outer edge portion 12 is opened at the same diameter so as to be continuous with the inner surface of the guide cylindrical portion 11.

As a top view of the guide 10 is shown in FIGS. 3 (a), 3 (b) and 3 (c), the guide outer edge 12 is circumferentially formed by the slits 12a provided along the radial direction. It is divided into multiple sections. In the examples of FIG. 3A, FIG. 3B, and FIG. 3C, the guide outer edge 12 is divided into six sections by the slits 12a. Moreover, in FIG. 3A, FIG. 3B, and FIG. 3C, as an example, an example in which the slits 12a are arranged at equal intervals in the circumferential direction is shown.
Moreover, in the example of FIG. 3A, FIG. 3B, and FIG. 3C, the guide outer edge portion 12 has a section (engagement portion 12b) provided with the engagement protrusion 12c, and the engagement protrusion 12c. Sections (steps 12e) in which are not provided are alternately arranged in the circumferential direction.

 Furthermore, in FIG. 3A, although the example in which the inner peripheral hole of the guide cylinder part 11 and the outer periphery are circular is shown, it is not limited to this. As shown in FIG. 3 (b), the end surface 11b of the guide cylindrical portion 111 of the guide cylindrical portion 111, the inner peripheral hole of the guide cylindrical portion 111 is a polygon such as a hexagon, for example. Also, as shown in FIG. 3 (c), the end surface 11c of the guide cylindrical portion 112 of the guide cylindrical portion 112, both the inner peripheral hole of the guide cylindrical portion 112 and the outer periphery may have a polygonal shape including hexagonal as an example. .

  Here, as shown in FIG. 4 which is a sectional view of the guide 10 including the engagement protrusion 12c along the line A-A in FIG. 3A, a section where the engagement protrusion 12c of the guide outer edge portion 12 is provided. Corresponds to the engaging portion 12b, and the groove 12d is formed radially inward of the engaging protrusion 12c. By forming the groove 12 d, the engaging portion 12 b becomes a thin portion having flexibility. By forming a thin portion, the engaging portion 12b of the guide outer edge portion 12 bends when fitting the engaging protrusion 12c into the engaging hole 20a, and plays a role of smoothly engaging the guide 10 with the guide mounting member 20. There is.

The section in which the engaging protrusion 12 c of the guide outer edge 12 is not provided corresponds to the step 12 e, and a step is generated between the guide outer edge 12 and the guide cylinder 11. The guide outer edge portion 12 has a diameter larger than that of the guide cylindrical portion 11 by the amount that the step portion 12 e protrudes radially outward, and is a thick portion. The stepped portion 12 e is a portion having no elasticity like the engaging portion 12 b and plays a role as a radial spacer when holding the guide 10 inside the guide mounting member 20.
In the region where the engaging protrusion 12c of the engaging portion 12b is not formed, the outer surface of the guide outer edge 12 is in contact with the inner surface of the guide mounting member 20.

As FIG. 2 shows a perspective view of the guide mounting member 20, the guide mounting member 20 is formed in a substantially cylindrical shape, and in the guide mounting member 20, an engagement hole for engaging the engagement protrusion 12c of the guide 10. 20a is opened. The guide attachment member 20 is formed to cover the outer surface of the guide 10, and supports and positions the cylindrical support portion 20b surrounding and supporting the guide cylindrical portion 11 of the guide 10 and the end face of the guide 10 on the movable side electrode 8 side. An end face support 20 c and a joint 20 d for joining to the movable side end plate 3 are provided. Further, the inner side surface of the guide mounting member 20 is a guide of the guide 10 such that the inner side surface of the guide mounting member 20 and the outer side surface of the guide 10 are in contact with each other at a position where the engaging protrusion 12 c and the engaging hole 20 a are engaged. It is formed in a shape that is bent along the outer side surfaces of the cylindrical portion 11 and the guide outer edge portion 12. As a result, the guide mounting member 20 in which the guide 10 is locked is in a state of supporting both of the two outer side surfaces of the guide 10 with different diameters.
Further, the end surface support portion 20 c formed at the end portion on the contact side of the guide mounting member 20 corresponds to a vertical surface portion extending perpendicularly to the axis of the movable electrode rod 5. The dimension of the end surface support portion 20c is determined so as to be in contact with the guide cylinder end surface 11a of the guide 10 when the engagement protrusion 12c and the engagement hole 20a are engaged.

  In the examples of FIGS. 3A, 3B, and 3C, the case where the engagement protrusions 12c (and the engagement holes 20a) are provided at three different positions in the electrode rod circumferential direction is shown. However, the number of engagement points is not limited to three, and may be plural. In addition, the guide 10 can be held by the guide mounting member 20 even at one location. Further, in FIGS. 3A, 3B, and 3C, the guide outer edge portion 12 is divided at equal intervals in the circumferential direction by the slits 12a, and each section (engaging portion 12b and step portion 12e) ) Is shown. However, it is also possible to arrange the slits 12a so as to have intervals other than equal intervals. For example, by forming the engaging portion 12b as a section having an angle smaller than that of the step 12e, the elasticity of the engaging portion 12b may be increased and the role of the step 12e as a spacer may be emphasized. It is possible. Further, although the slits 12a are formed to have the same width along the axial direction and the radial direction, the slits 12a may be formed to change the width along the axial direction or the radial direction.

Further, in the guide attachment member 20, the engagement hole 20a of the guide attachment member 20 is formed at a position corresponding to the engagement projection 12c of the guide 10 as a through hole provided in the radial direction. The engagement hole 20a is opened to such a size that the engagement protrusion 12c is inserted with no space by the elasticity of the engagement portion 12b.
When assembling the guide 10 to the guide mounting member 20, the direction of the engaging hole 20a of the guide mounting member 20 and the direction of the engaging projection 12c of the guide 10 are matched, and the elasticity of the engaging portion 12b of the guide 10 is utilized. The guide 10 can be easily assembled by pushing the guide 10 into 20.
At the same time, when the engagement protrusion 12c is fitted into the engagement hole 20a, the guide cylinder end surface 11a is in contact with the end surface support 20c of the guide mounting member 20. Therefore, the guide 10 is firmly fixed to the guide mounting member 20.
As described above, since the guide 10 is configured to be fitted to the guide mounting member 20, the conventional screwing operation becomes unnecessary.

As described above, according to the vacuum valve 100 of the present invention, the cylindrical guide 10 is provided with the guide outer edge portion 12 projecting radially outward, and the guide mounting member 20 has the engaging projection 12 c of the guide 10. An engagement hole 20 a to be engaged is provided, and the engagement projection 12 c of the guide 10 is engaged with the engagement hole 20 a of the guide mounting member 20 to fix the guide 10 to the guide mounting member 20.
Therefore, in the attachment work of the guide 10, since a fixing member such as a screw is not used, the number of parts can be reduced, the fastening work of screwing is not required, and the attachment work is simplified.
And it is not necessary to provide the disc part of the guide which was required when screwing the guide 10, and it is not necessary to provide the guide mounting plate which needed sufficient thickness to secure screwing strength. Therefore, the vacuum valve 100 can be miniaturized.

In addition, since the end surface support portion 20 c of the guide mounting member 20 is bent so as to contact the end surface 11 a of the guide cylinder end of the guide 10 on the movable side electrode 8 side, the guide 10 is inserted into the guide mounting member 20 It is possible to manage the insertion length of the case and to prevent it from being inserted accidentally.
Furthermore, the cylindrical support portion 20b and the end surface support portion 20c of the guide mounting member 20 are disposed so as to cover the outer surface of the guide cylindrical portion 11 and the end surface 11a of the guide cylindrical portion. The guide 10 can be thinned because it has sufficient strength to the electromagnetic force at the time of current application, and the inexpensive vacuum valve 100 can be obtained.

  FIG. 5 shows a cross-sectional view of a schematic structure of a vacuum circuit breaker 50 using the vacuum valve 100 shown in the present embodiment. The fixed side electrode bar 4 and the movable side electrode bar 5 protrude from the upper part and the lower part of the vacuum valve 100. The fixed side electrode bar 4 is connected to the fixed side conductor 14 and the movable side electrode bar 5 is connected to the movable side conductor 15. ing.

  Further, the fixed side electrode bar 4 is connected to the fixed side electrode 7 and the movable side electrode bar 5 is connected to the movable side electrode 8, and the movable side electrode bar 5 operates according to the operation of the drive unit 22 to move the fixed side electrode 7 and the movable side Connect or release the electrode 8. Thus, by opening and closing the main circuit between the fixed side conductor 14 and the movable side conductor 15, the vacuum circuit breaker 50 can be used.

Second Embodiment
Next, a vacuum valve 100 according to a second embodiment of the present invention will be described with reference to FIGS. 6 to 9. In the vacuum valve 100 according to the first embodiment described above, the stepped portion 12e of the guide outer edge portion 12 of the guide 10 serving as a component is formed such that the outer surface has a diameter larger than that of the guide cylindrical portion 11 It has shown having a role as a spacer at the time of inserting the guide 10 into 20. FIG.
In the second embodiment, when the guide 10 is inserted into the outer surface of the step portion 12e of the guide outer edge portion 12, the positioning protrusion 13 for determining the insertion direction is provided, and the positioning protrusion 13 is fitted on the guide mounting member 20 side. It is characterized in that a positioning groove 21 is provided.

6 is a cross-sectional view showing the structure of a vacuum valve 100 according to Embodiment 2 of the present invention, and FIG. 7 is a perspective view of the guide 10 and the guide attachment member 20 of Embodiment 2. As shown in FIG. The same parts as in FIG. 1 of the first embodiment described above are given the same reference numerals, and descriptions thereof will be omitted. Here, the differences will be mainly described. In the second embodiment, as shown in FIG. 6, the guide 10 is characterized in that the positioning projection 13 is provided on the guide 10 and the positioning groove 21 is provided on the guide mounting member 20.
The positioning projection 13 and the positioning groove 21 are formed to have dimensions that can be fitted together without a gap. Further, the positioning projections 13 and the positioning grooves 21 are formed so as to coincide in the circumferential direction, and at the same time, the positions of the engagement projections 12 c of the guide 10 and the engagement holes 20 a of the guide mounting member 20 coincide with each other.

  When fitting the guide 10 into the guide mounting member 20, the positioning protrusion 13 is made to fit along the positioning groove 21 and the guide 10 is pushed. At this time, as in the first embodiment, at the same time as the engagement projection 12c of the guide 10 is engaged with the engagement hole 20a of the guide mounting member 20, the end surface 11a of the guide cylinder portion is an end surface supporting portion of the guide mounting member 20. The guide 10 is firmly fixed to the guide mounting member 20 in order to contact with 20 c.

FIG. 8 is a top view of the guide 10 according to the second embodiment, and shows the case where the engagement projections 12c (and the engagement holes 20a) and the positioning projections 13 (and the positioning grooves 21) are provided at three locations. However, the number of engagement points is not limited to three, and there may be a plurality of points, and engagement can be performed even at one point. It is needless to say that the number of positioning projections 13 and the number of engagement projections 12c do not have to be the same, but may be different.
Further, FIG. 9 shows a cross-sectional view of the guide 10 of FIG. 8 along the line B-B. FIG. 9 shows an example in which the engagement protrusions 12c and the positioning protrusions 13 are arranged in axial symmetry.

As described above, according to the vacuum valve 100 of the present invention, the periphery of the engagement projection 12 c of the guide 10 and the engagement hole 20 a of the guide attachment member 20 at the position where the positioning projection 13 and the positioning groove 21 coincide in the circumferential direction. In addition to the effects obtained in the above-described first embodiment, the positioning projections 13 are fitted in the positioning grooves 21 in order to align the positions of the directions, and the guides 10 are attached to the guide mounting members 20 while performing accurate alignment. Can be stably installed on the
Further, since the positioning projection 13 and the positioning groove 21 are formed to have dimensions that can be fitted without a gap, in addition to the fitting of the engagement projection 12c and the engagement hole 20a, the fitting of the positioning groove 21 and the positioning projection 13 is also possible. The guide 10 can be fixed to the guide mounting member 20, and the guide 10 can be held more stably.
As described above, the formation of the positioning projections 13 and the positioning grooves 21 facilitates positioning of the guides 10 and the guide mounting members 20 in the circumferential direction, and the fitting operation time of the guides 10 can be shortened.

  In the present invention, within the scope of the invention, each embodiment can be freely combined, or each embodiment can be appropriately modified or omitted.

DESCRIPTION OF SYMBOLS 1 insulating cylinder, 2 fixed side end plate, 3 movable side end plate, 4 fixed side electrode bar, 5 movable side electrode bar, 6 bellows, 6a bellows cover, 7 fixed side electrode, 8 movable side electrode, 9 shield, 10 guide 11, 111, 112 guide tube, 11 a, 11 b, 11 c guide tube end face, 12 guide outer edge, 12 a slit, 12 b engagement portion, 12 c engagement protrusion, 12 d groove portion, 12 e step portion, 13 positioning protrusion, 14 Fixed side conductor, 15 movable side conductor, 20 guide mounting member, 20a engagement hole, 20b cylindrical support, 20c end face support, 20d joint, 21 positioning groove, 22 drive, 50 vacuum circuit breaker, 100 vacuum valve

Claims (7)

A vacuum vessel provided with a fixed end plate at one end of the insulating cylinder and a movable end plate at the other end;
The fixed side electrode and the movable side electrode which are disposed in the inside of the vacuum vessel so as to be freely attached and detached,
A movable side electrode rod which causes one end to be fixed to the movable side electrode and the other end is drawn out of the vacuum vessel and linearly moved to move the movable side electrode to and from the fixed side electrode;
Guiding the movable side electrode bar, which comprises a guide cylindrical portion surrounding the periphery of the movable side electrode bar, and a guide outer edge portion provided at one end of the guide cylindrical portion and having a larger diameter than the guide cylindrical portion A guide,
Is joined to the movable side end plate, and a guide attaching member for holding the guide from the outer periphery,
It has an engagement protrusion formed on the guide outer edge of the guide and protruding radially outward, and an engagement hole formed on the guide attachment member and engaged with the engagement protrusion .
The guide mounting member has a vertical surface portion extending perpendicularly to the axis of the movable electrode, and the guide protrusion is engaged with the engagement hole of the guide mounting member at a position where the engagement protrusion of the guide is engaged. A vacuum valve, wherein an end face of a cylindrical portion abuts on the vertical surface portion .   A vacuum vessel provided with a fixed end plate at one end of the insulating cylinder and a movable end plate at the other end;
  The fixed side electrode and the movable side electrode which are disposed in the inside of the vacuum vessel so as to be freely attached and detached,
  A movable side electrode rod which causes one end to be fixed to the movable side electrode and the other end is drawn out of the vacuum vessel and linearly moved to move the movable side electrode to and from the fixed side electrode;
  Guiding the movable side electrode bar, which comprises a guide cylindrical portion surrounding the periphery of the movable side electrode bar, and a guide outer edge portion provided at one end of the guide cylindrical portion and having a larger diameter than the guide cylindrical portion A guide,
  And a guide attachment member joined to the movable side end plate and holding the guide from the outer periphery,
  It has an engagement protrusion formed on the guide outer edge of the guide and protruding radially outward, and an engagement hole formed on the guide attachment member and engaged with the engagement protrusion.
  An inner surface of the guide mounting member is formed in a shape along an outer surface of the guide cylindrical portion of the guide and an outer edge portion of the guide.   The vacuum valve according to claim 1 or 2, wherein the guide outer edge portion is divided into a plurality of sections in the circumferential direction by a slit provided along the radial direction. The guide edge portion, the engagement projection is not provided section and the engaging projection provided section is a vacuum valve according to claim 3, characterized by being alternately arranged in the circumferential direction. 5. The vacuum valve according to claim 3, wherein a section of the guide outer edge portion provided with the engagement protrusion is provided with a groove on a radially inner side of the engagement protrusion . The vacuum valve according to any one of claims 1 to 5 , wherein the guide outer edge portion is provided with a positioning projection, and the guide mounting member is provided with a positioning groove fitted to the positioning projection. A vacuum valve according to any one of claims 1 to 6 ;
A fixed side conductor and a movable side conductor respectively connected to the fixed side electrode and the movable side electrode of the vacuum valve;
Vacuum circuit breaker is characterized in that a drive device for performing and away between the electrodes of the vacuum valve.

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