JP6846878B2 - Vacuum valve - Google Patents

Description

The present invention relates to a vacuum valve mounted on, for example, a vacuum circuit breaker.

The structure of a general vacuum valve will be described. A fixed side end plate and a movable side end plate are joined to both ends of the insulated container, respectively, to form a vacuum container in which the inside is sealed. Fixed side electrodes facing each other and movable side electrodes that can be brought into contact with each other are arranged in this vacuum vessel. A fixed side electrode rod is attached to the fixed side electrode, and a movable side electrode rod is attached to the movable side electrode. The fixed side electrode rod is joined to the fixed side end plate.

The end of the bellows formed in a bellows shape with a thin metal such as stainless steel is joined to the movable side end plate, and the other bellows end is joined to the movable side electrode rod to maintain airtightness and enable opening and closing. ..

A guide mounting plate for fixing a guide for guiding the axial movement of the movable side electrode rod is joined to the movable side end plate, and the guide is fixed to the guide mounting plate by screwing. The inner diameter of the guide and the sliding part of the movable side electrode rod with the guide have a polygonal shape such as a hexagon, and by suppressing the inclination and rotation of the movable side electrode rod, the bellows is expanded and contracted in a twisted state. Prevents the bellows from coming out and secures the machine life performance of the bellows.

Japanese Unexamined Patent Publication No. 5-101754 JP-A-2015-210850

In the conventional vacuum valve described above, in order to reduce the contact resistance of the vacuum valve and ensure stable breaking performance, it is necessary to suppress the misalignment between the fixed side electrode and the movable side electrode of the vacuum valve.
In a vacuum valve in which the positions of the fixed side electrode and the movable side electrode are displaced, the contact resistance is increased and the breaking performance is lowered due to the increase in the electric field value between the fixed side electrode and the movable side electrode. In order to suppress the misalignment between the fixed side electrode and the movable side electrode, a guide molded of synthetic resin is generally fixed to a guide mounting plate joined to the movable side end plate of the vacuum valve, and the inside of the hole of the guide is movable. The structure is such that the tilt of the movable side electrode rod is suppressed by sliding the side electrode rod.

However, since the distance from the guide to the movable electrode is long, even a slight tilt of the movable electrode rod causes a large misalignment of the movable electrode, and there is a problem that the misalignment between the fixed electrode and the movable electrode cannot be suppressed. ..

Further, in order to fix the guide, it is necessary to join the guide mounting plate to the movable side end plate, and since the guide is fixed to the guide mounting plate by screwing or the like, there is a problem that the number of parts and the work process increase. is there.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a vacuum valve having a simple structure capable of suppressing a displacement between a fixed side electrode and a movable side electrode. ..

The vacuum valve according to the present invention has an insulating container whose inside is closed by a fixed side end plate and a movable side end plate joined to both ends, respectively, and a fixed side electrode fixed to the fixed side end plate at the end. A fixed-side electrode rod provided, a movable-side electrode rod arranged coaxially with the fixed-side electrode rod, and a movable-side electrode provided at an end capable of contacting and detaching from the fixed-side electrode, and the movable-side electrode. A vacuum valve including a bellows airtightly joined between a rod and the movable end plate, the first engaging portion provided at one or a plurality of places on the inner surface of the insulating container, and the bellows. The bellows cover provided at the end on the movable side electrode side is arranged between the bellows cover and the movable side electrode, and the inner surface of the insulating container is slidably attached to the movable side electrode rod. It is provided with a guide plate having a second engaging portion that engages with the first engaging portion.

Further, the vacuum valve according to the present invention has an insulating container whose inside is closed by a fixed side end plate and a movable side end plate joined to both ends, respectively, and a fixed side fixed to the fixed side end plate. A fixed-side electrode rod provided with an electrode, a movable-side electrode rod arranged coaxially with the fixed-side electrode rod, and a movable-side electrode provided at an end capable of contacting and detaching from the fixed-side electrode, and the movable side electrode rod. A vacuum valve provided with a bellows airtightly joined between a side electrode rod and the movable side end plate, the shield arranged on the inner surface of the insulating container, and one or a plurality of shields provided. The fourth engaging portion, the bellows cover provided at the end of the bellows on the movable side electrode side, and the shield provided on the movable side electrode rod are arranged between the bellows cover and the movable side electrode. A guide plate having a fifth engaging portion that is slidably attached to the inner surface of the fourth engaging portion and engages with the fourth engaging portion is provided.

Further, the vacuum valve according to the present invention has an insulating container whose inside is closed by a fixed side end plate and a movable side end plate joined to both ends, respectively, and a fixed side fixed to the fixed side end plate. A fixed-side electrode rod provided with an electrode, a movable-side electrode rod arranged coaxially with the fixed-side electrode rod, and a movable-side electrode provided at an end capable of contacting and detaching from the fixed-side electrode, and the movable side electrode rod. A vacuum valve provided with a bellows airtightly bonded between a side electrode rod and the movable end plate. The fixed side electrode and the movable side electrode are composed of a windmill-shaped electrode, and are formed on the back surface of the fixed side electrode. A fixed-side arc diffusion prevention plate provided, a movable-side arc diffusion prevention plate provided on the back surface of the movable-side electrode, and a first engaging portion provided at one or a plurality of locations on the inner surface of the insulating container. The bellows cover provided at the end of the bellows on the movable side electrode side and the bellows cover provided on the outer periphery having the function of the guide plate of the movable side arc diffusion prevention plate slide on the inner surface of the insulating container. It is configured to be possible and includes a seventh engaging portion that engages with the first engaging portion.

Further, the vacuum valve according to the present invention has an insulating container whose inside is closed by a fixed side end plate and a movable side end plate joined to both ends, respectively, and a fixed side fixed to the fixed side end plate. A fixed-side electrode rod provided with an electrode, a movable-side electrode rod arranged coaxially with the fixed-side electrode rod, and a movable-side electrode provided at an end capable of contacting and detaching from the fixed-side electrode, and the movable side electrode rod. A vacuum valve provided with a bellows airtightly bonded between a side electrode rod and the movable side end plate, the first engaging portion provided at one or a plurality of locations on the inner surface of the insulating container, and the said. The inner surface of the insulating container is slidably provided at the end of the bellows on the movable side electrode side, has a thickness capable of suppressing the inclination of the movable side electrode rod, and engages with the first engaging portion. It is provided with a bellows cover having an eighth engaging portion.

According to the vacuum valve according to the present invention, the movable side electrode rod can be slidably supported at a position close to the movable side electrode by the guide plate and the bellows cover, so that the displacement of the movable side electrode can be suppressed. It is possible to obtain a vacuum valve having a simple structure.

It is sectional drawing which shows the vacuum valve which concerns on Embodiment 1 of this invention. FIG. 5 is a cross-sectional view taken along the line II-II of FIG. 1 showing a vacuum valve according to a first embodiment of the present invention. It is sectional drawing which shows the vacuum valve which concerns on Embodiment 2 of this invention. It is sectional drawing in the IV-IV line of FIG. 3 which shows the vacuum valve which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the vacuum valve which concerns on Embodiment 3 of this invention. FIG. 5 is a cross-sectional view taken along the line VI-VI of FIG. 5 showing a vacuum valve according to a third embodiment of the present invention. It is sectional drawing which shows the vacuum valve which concerns on Embodiment 4 of this invention. FIG. 5 is a cross-sectional view taken along the line VIII-VIII of FIG. 7 showing a vacuum valve according to a fourth embodiment of the present invention. It is sectional drawing which shows the vacuum valve which concerns on Embodiment 5 of this invention. It is sectional drawing in X-ray of FIG. 9 which shows the vacuum valve which concerns on Embodiment 5 of this invention.

Embodiment 1.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2, but in each of the drawings, the same or corresponding members and parts will be described with the same reference numerals. FIG. 1 is a cross-sectional view showing a vacuum valve according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1 showing a vacuum valve according to the first embodiment of the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes a cylindrical insulating container made of alumina ceramic or the like having convex portions 1a provided at one or a plurality of locations on the inner surface. Reference numeral 2 is a fixed side end plate, 3 is a movable end plate, and the fixed side end plate 2 and the movable end plate 3 are joined coaxially at both ends of the insulating container 1, respectively.

The fixed side electrode rod 4 is joined to the fixed side end plate 2, and the movable side electrode rod 5 is joined to the movable side end plate 3 via the bellows 6, and the fixed side electrode rod 4 and the movable side electrode rod 5 are coaxially on the same axis. It is located in. Reference numeral 7 denotes a fixed side electrode bonded to the 4 ends of the fixed side electrode rods in the insulating container 1, and 8 is a movable side electrode bonded to the 5 ends of the movable side electrode rods in the insulated container 1. The movable side electrodes 8 are arranged so as to face each other, and the movable side electrodes 8 can be brought into contact with and separated from the fixed side electrodes 7.

A bellows cover 9 is joined to the movable side electrode rod 5 at the end of the bellows 6 on the movable side electrode 8 side. The bellows cover 9 prevents the surface of the bellows 6 from being contaminated by the metal vapor generated from the fixed side electrode 7 and the movable side electrode 8 when the current is cut off.

The guide plate 10 is joined to the movable side electrode rod 5 between the bellows cover 9 and the movable side electrode 8, and there is a gap for sliding between the outer circumference of the bellows cover 9 and the guide plate 10 and the inner surface of the insulating container 1. It is provided.

The outer peripheral surfaces of the bellows cover 9 and the guide plate 10 slide with the inner surface of the insulating container 1 to suppress the inclination of the movable side electrode rod 5, and the first engaging portion formed of, for example, a convex portion provided on the insulating container 1. The movable side electrode rod 5 is twisted in the circumferential direction due to the engagement of 1a and the third engaging portion 9a and the second engaging portion 10a, which are provided on the bellows cover 9 and the guide plate 10, respectively. To prevent.

In the vacuum valve according to the first embodiment, the fixed side electrode 7 and the movable side electrode 8 are brought into contact with each other to cut off and input the current. The bellows cover 9 and the guide plate 10 having the guide function align the axes of the fixed side electrode 7 and the movable side electrode 8, and can withstand the electromagnetic force generated in the movable side electrode rod 5 when a large current is applied. It has a function of smoothly sliding the movable side electrode rod 5.

In order to satisfy the above functions, the movable side electrode 8 is prevented from being displaced by sliding the inner surface of the insulating container 1 and the outer circumferences of the bellows cover 9 and the guide plate 10 when the movable side electrode 8 is brought into contact with each other. The bellows cover 9 and the third engaging portion 9a and the second engaging portion 10a formed of the concave portions provided on the guide plate 10 are engaged with the first engaging portion 1a formed of the convex portion provided on the inner surface of the insulating container 1. By fitting, the movable side electrode rod 5 is prevented from being twisted in the circumferential direction. The bellows cover 9 and the guide plate 10 are made of an insulator and have a structure that smoothly slides with the insulating container 1.

As described above, according to the first embodiment, the movable side electrode is located near the movable side electrode 8 by the bellows cover 9, the guide plate 10, and the insulating container 1 having a function of guiding the movable side electrode rod 5. Since the rod 5 can be slidably supported, the axes of the fixed side electrode 7 and the movable side electrode 8 can be accurately aligned. By suppressing the misalignment between the fixed side electrode 7 and the movable side electrode 8, it is possible to reduce the contact resistance and secure stable blocking performance.

Further, unlike the conventional vacuum valve described above, the guide mounting plate to be joined to the movable side end plate 3 and the guide to be attached to the guide mounting plate by screwing or the like are not required. The assembly process can be reduced, and the vacuum valve can be manufactured at low cost.

Further, the cross section of the movable side electrode rod 5 can be made circular, and the cross-sectional area is wider than that of the movable side electrode rod having a polygonal cross section having the same outer diameter, and the energization capacity can be increased. Further, when the bellows cover 9 and the guide plate 10 are made of metal, the same effect can be obtained by forming only the outer peripheral portion sliding with the inner surface of the insulating container 1 with an insulator.

Embodiment 2.
Embodiment 2 of the present invention will be described with reference to FIGS. 3 and 4, but in each of the drawings, the same or corresponding members and parts will be described with the same reference numerals. FIG. 3 is a cross-sectional view showing a vacuum valve according to a second embodiment of the present invention. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3 showing a vacuum valve according to a second embodiment of the present invention.

In the vacuum valve according to the second embodiment, the inner surface of the insulating container 1 is a first engaging portion 1b made of a polygonal surface such as a hexagon, and the outer periphery of the bellows cover 11 and the guide plate 12 is the inner surface of the insulating container 1. Together with the first engaging portion 1b made of a polygonal surface, the third engaging portion 11a and the second engaging portion 12a made of a polygonal body such as a hexagon are formed.

In the vacuum valve according to the second embodiment, the inner surface of the insulating container 1 is a first engaging portion 1b made of a polygonal surface such as a hexagon, and the outer circumferences of the bellows cover 11 and the guide plate 12 are polygons such as a hexagon. By forming the third engaging portion 11a and the second engaging portion 12a made of the shaped body, the first engaging portion 1b made of the polygonal surface of the inner surface of the insulating container 1 is formed into the polygonal shape of the bellows cover 11 and the guide plate 12. By sliding the third engaging portion 11a and the second engaging portion 12a made of the body, the movable side electrode rod 5 is prevented from being displaced from the axis as in the above-described first embodiment, and the movable side electrode rod 5 is moved. It is possible to suppress twisting in the circumferential direction.

As described above, according to the second embodiment, the movable side electrode is located near the movable side electrode 8 by the bellows cover 11, the guide plate 12, and the insulating container 1 having a function of guiding the movable side electrode rod 5. Since the rod 5 can be slidably supported, the axes of the fixed side electrode 7 and the movable side electrode 8 can be accurately aligned. By suppressing the misalignment between the fixed side electrode 7 and the movable side electrode 8, it is possible to reduce the contact resistance and secure stable blocking performance.

Further, unlike the conventional vacuum valve described above, the guide mounting plate to be joined to the movable side end plate 3 and the guide to be attached to the guide mounting plate by screwing or the like are not required. The assembly process can be reduced, and the vacuum valve can be manufactured at low cost.

Further, the cross section of the movable side electrode rod 5 can be made circular, and the cross-sectional area is wider than that of the movable side electrode rod having a polygonal cross section having the same outer diameter, and the energization capacity can be increased. In the second embodiment, the case where the inner surface of the insulating container 1 is a hexagonal surface and the outer periphery of the bellows cover 11 and the guide plate 12 is a hexagonal body is described, but the present invention is not limited to this, and insulation is provided. The inner surface of the container 1 may be a polygonal surface other than the hexagonal shape, and the outer periphery of the bellows cover 11 and the guide plate 12 may be a polygonal body other than the hexagonal shape, and the same effect can be obtained.

Embodiment 3.
Embodiment 3 of the present invention will be described with reference to FIGS. 5 and 6, but in each of the drawings, the same or corresponding members and parts will be described with the same reference numerals. FIG. 5 is a cross-sectional view showing a vacuum valve according to a third embodiment of the present invention. FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5 showing a vacuum valve according to a third embodiment of the present invention.

In the vacuum valve according to the third embodiment, 13 is a shield arranged so as to surround the fixed side electrode 7 and the movable side electrode 8 and fixed to the insulating container 1, and the inner surface of the insulating container 1 is fixed on the fixed side when the current is cut off. It is prevented from being polluted by the metal vapor generated from the electrode 7 and the movable electrode 8.

Further, the inner surface of the shield 13 has a structure in which a fourth engaging portion 13a formed of, for example, a convex portion is provided at one or a plurality of locations, and the fourth engaging portion 13a formed of, for example, a convex portion of the shield 13, a bellows cover 14, and a guide. The movable side electrode rod 5 is prevented from being twisted in the circumferential direction due to the engagement of the sixth engaging portion 14a and the fifth engaging portion 15a, which are formed of, for example, recesses provided on the plate 15, respectively. The outer circumferences of the bellows cover 14 and the guide plate 15 are provided with a gap so as to slide with the inner surface of the shield 13, and the shape is slightly smaller than the inner surface shape of the shield 13.

Even in the vacuum valve in which the shield 13 is arranged on the inner surface of the insulating container 1 as in the third embodiment, the inner surface of the shield 13 and the outer circumferences of the bellows cover 14 and the guide plate 15 slide, so that the above-described embodiment is performed. Similar to the first embodiment, it is possible to prevent the movable side electrode rod 5 from being displaced from the axis and to prevent the movable side electrode rod 5 from being twisted in the circumferential direction.

As described above, according to the third embodiment, the movable side electrode rod is located near the movable side electrode 8 by the bellows cover 14, the guide plate 15, and the shield 13 having a function of guiding the movable side electrode rod 5. Since 5 can be slidably supported, the axes of the fixed side electrode 7 and the movable side electrode 8 can be accurately aligned. By suppressing the misalignment between the fixed side electrode 7 and the movable side electrode 8, it is possible to reduce the contact resistance and secure stable blocking performance.

Further, unlike the conventional vacuum valve described above, the guide mounting plate to be joined to the movable side end plate 3 and the guide to be attached to the guide mounting plate by screwing or the like are not required. The assembly process can be reduced, and the vacuum valve can be manufactured at low cost.

Further, the cross section of the movable side electrode rod 5 can be made circular, and the cross-sectional area is wider than that of the movable side electrode rod having a polygonal cross section having the same outer diameter, and the energization capacity can be increased. In the third embodiment, the inner surface of the shield 13 and the outer periphery of the bellows cover 14 and the guide plate 15 have an uneven structure, but the same applies to a polygonal structure such as a hexagonal shape as in the second embodiment described above. The effect can be obtained.

Embodiment 4.
Embodiment 4 of the present invention will be described with reference to FIGS. 7 and 8, but in each of the drawings, the same or corresponding members and parts will be described with the same reference numerals. FIG. 7 is a cross-sectional view showing a vacuum valve according to a fourth embodiment of the present invention. FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. 7 showing the vacuum valve according to the fourth embodiment of the present invention.

In the vacuum valve according to the fourth embodiment, the fixed side electrode 7 and the movable side electrode 8 have a windmill-shaped electrode structure. The wind turbine-shaped electrode extinguishes the arc by circulating the arc generated between the fixed side electrode 7 and the movable side electrode 8 by the electromagnetic force generated between the fixed side electrode 7 and the movable side electrode 8 when the current is cut off. ..

When the current is cut off, metal vapor is generated from the fixed side electrode 7 and the movable side electrode 8, and the metal steam is emitted from the slits 7a and 8a provided in the fixed side electrode 7 and the movable side electrode 8 in the direction of the fixed side end plate 2 and. Since the current diffuses in the direction of the movable end plate 3, the fixed arc diffusion prevention plate 16 and the movable arc diffusion prevention plate 17 are joined so as to be adjacent to the fixed electrode 7 and the movable electrode 8.

The outer peripheral edge of the movable arc diffusion prevention plate 17 is configured to have the function of a guide plate, and the outer periphery of the movable arc diffusion prevention plate 17 and the bellows cover 9 is the insulating container 1 as in the above-described first embodiment. A gap for sliding with the inner surface is provided, and the shape is slightly smaller than the inner surface of the insulating container 1.

In the vacuum valve according to the fourth embodiment, the outer peripheral edge of the movable arc diffusion prevention plate 17 is configured to have the function of a guide plate, so that the vacuum valve is composed of a convex portion provided on the inner surface of the insulating container 1. When the third engaging portion 9a and the seventh engaging portion 18a, which are provided on the bellows cover 9 and the guide plate 18, respectively, are engaged with the engaging portion 1a, the movable side electrode rod 5 is rotated. It prevents it from twisting in the direction. Similar to the first embodiment described above, it is possible to prevent the movable side electrode rod 5 from being displaced from the axis and to suppress the movable side electrode rod 5 from being twisted in the circumferential direction.

As described above, according to the fourth embodiment, the bellows cover 9 having a function of guiding the movable side electrode rod 5, the movable side arc diffusion prevention plate 17, and the insulating container 1 provide a place closer to the movable side electrode 8. The movable side electrode rod 5 can be supported by the above method, and the axes of the fixed side electrode 7 and the movable side electrode 8 can be accurately aligned with each other. By suppressing the misalignment between the fixed side electrode 7 and the movable side electrode 8, it is possible to reduce the contact resistance and ensure stable blocking performance.

Further, unlike the conventional vacuum valve described above, the guide mounting plate to be joined to the movable side end plate 3 and the guide to be attached to the guide mounting plate by screwing or the like are not required. The assembly process can be reduced, and the vacuum valve can be manufactured at a lower cost.

Further, the cross section of the movable side electrode rod 5 can be made circular, and the cross-sectional area is wider than that of the movable side electrode rod having a polygonal cross section having the same outer diameter, and the energization capacity can be increased. In the fourth embodiment, the inner surface of the insulating container 1 and the outer periphery of the bellows cover 9 and the movable arc diffusion prevention plate 17 have an uneven structure, but as in the second embodiment described above, a polygonal structure such as a hexagonal shape is used. However, the same effect can be obtained.

Further, as in the case of the third embodiment described above, in the case of the vacuum valve provided with the shield 13 fixed to the insulating container 1, in the case of the structure in which the shield 13, the bellows cover 9 and the movable arc diffusion prevention plate 17 slide. However, the same effect can be obtained.

Embodiment 5.
Embodiment 5 of the present invention will be described with reference to FIGS. 9 and 10, but in each of the drawings, the same or corresponding members and parts will be described with the same reference numerals. FIG. 9 is a cross-sectional view showing a vacuum valve according to a fifth embodiment of the present invention. FIG. 10 is a cross-sectional view taken along line XX of FIG. 9 showing a vacuum valve according to a fifth embodiment of the present invention.

In the vacuum valve according to the fifth embodiment, the bellows cover 19 having a thickness capable of suppressing the inclination of the movable side electrode rod 5 is provided, and the outer circumference of the bellows cover 19 is provided with a gap for sliding with the inner surface of the insulating container 1. The shape is slightly smaller than the inner surface of the insulating container 1.

In the fifth embodiment, the bellows cover 19 slides on the inner surface of the insulating container 1 to prevent the movable side electrode rod 5 from being displaced from the axis and to suppress the movable side electrode rod 5 from being twisted in the circumferential direction. it can.

In the fifth embodiment, the first engaging portion 1a formed of the convex portion provided on the inner surface of the insulating container 1 is engaged with the eighth engaging portion 19a formed of, for example, the concave portion provided on the bellows cover 19. , The movable side electrode rod 5 is prevented from being twisted in the circumferential direction. Similar to the first embodiment described above, it is possible to prevent the movable side electrode rod 5 from being displaced from the axis and to suppress the movable side electrode rod 5 from being twisted in the circumferential direction.

As described above, according to the fifth embodiment, the movable side electrode is located near the movable side electrode 8 by the thick bellows cover 19 having the function of guiding the movable side electrode rod 5 and the insulating container 1. Since the rod 5 can be slidably supported, the axes of the fixed side electrode 7 and the movable side electrode 8 can be accurately aligned. By suppressing the misalignment between the fixed side electrode 7 and the movable side electrode 8, it is possible to reduce the contact resistance and ensure stable blocking performance.

Further, unlike the conventional vacuum valve described above, the guide mounting plate joined to the movable side end plate 3, the guide attached to the guide mounting plate by screwing or the like, and the guide plate in each of the above-described embodiments are not required. Therefore, the number of parts and the parts assembly process can be reduced with a simple configuration, and the vacuum valve can be manufactured at a lower cost.

Further, the cross section of the movable side electrode rod 5 can be made circular, and the cross-sectional area is wider than that of the movable side electrode rod having a polygonal cross section having the same outer diameter, and the energization capacity can be increased. In the fifth embodiment, the inner surface of the insulating container 1 and the outer circumference of the bellows cover 19 have an uneven structure, but the same effect can be obtained even with a polygonal shape such as a hexagonal shape as in the second embodiment described above. be able to.

Further, as in the case of the third embodiment described above, in the case of the vacuum valve provided with the shield 13 fixed to the insulating container 1, the same effect can be obtained even if the shield 13 and the bellows cover 19 are slid. ..

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

The present invention is suitable for realizing a vacuum valve having a simple structure capable of suppressing the displacement of the movable electrode.

1 the insulating container, 1a protrusions, 2 fixed side end plate, 3 movable side end plate, 4 fixed side electrode rod, 5-friendly dynamic side electrode rod, 6 bellows, 7 fixed electrode, 7a slit, 8 movable side electrode, 8 a slits, 9 bellows cover, 1 0 guide plate, 1 1 bellows cover, 1 second guide plate, 1 3 shield, 1 4 bellows cover, 1 5 the guide plate, 1 6 stationary arc diffusion prevention plate, 17 movable arc diffusion preventing plate, 1 9 Berozukaba over

Claims (19)

An insulating container whose inside is closed by a fixed-side end plate and a movable-side end plate joined to both ends, and a fixed-side electrode rod fixed to the fixed-side end plate and provided with a fixed-side electrode at the end. , A movable side electrode rod arranged coaxially with the fixed side electrode rod and provided with a movable side electrode at the end which can be brought into contact with and separated from the fixed side electrode, and between the movable side electrode rod and the movable side end plate. A vacuum valve provided with an airtightly joined bellows, a first engaging portion provided at one or a plurality of locations on the inner surface of the insulating container, and an end portion of the bellows on the movable side electrode side. Is arranged between the bellows cover and the movable electrode, and the inner surface of the insulating container is slidably attached to the movable electrode rod, and is engaged with the first engaging portion. A vacuum valve comprising a guide plate having a matching second engaging portion. The vacuum valve according to claim 1, wherein the bellows cover is slidably provided on the inner surface of the insulating container and has a third engaging portion that engages with the first engaging portion. It said first engaging portion is a convex portion, the vacuum valve according to請Motomeko 2 you, wherein the second engaging portion and the third engaging portion is concave. The first Kakarigobu is polygonal surface, a vacuum valve according to請Motomeko 2 you, wherein the second engaging portion and the third Kakarigobu is polygonal body. An insulating container whose inside is closed by a fixed-side end plate and a movable-side end plate joined to both ends, and a fixed-side electrode rod fixed to the fixed-side end plate and provided with a fixed-side electrode at the end. , A movable side electrode rod arranged coaxially with the fixed side electrode rod and provided with a movable side electrode at the end which can be brought into contact with and separated from the fixed side electrode, and between the movable side electrode rod and the movable side end plate. A vacuum valve provided with an airtightly joined bellows, the shield arranged on the inner surface of the insulating container, the fourth engaging portion provided at one or a plurality of places of the shield, and the bellows. The bellows cover provided at the end of the movable side electrode side is arranged between the bellows cover and the movable side electrode, and the inner surface of the insulating container is slidably attached to the movable side electrode rod. , A vacuum valve comprising a guide plate having a fifth engaging portion that engages with the fourth engaging portion. The vacuum valve according to claim 5, wherein the bellows cover is slidably provided on an inner surface of the shield and has a sixth engaging portion that engages with the fourth engaging portion. The fourth engaging portion is convex portion, the vacuum valve according to請Motomeko 6 you wherein the fifth engagement portion and the sixth engaging portion is concave. The fourth Kakarigobu is polygonal surface, a vacuum valve according to請Motomeko 6 you wherein the fifth engagement portion and the sixth Kakarigobu is polygonal body. An insulating container whose inside is closed by a fixed-side end plate and a movable-side end plate joined to both ends, and a fixed-side electrode rod fixed to the fixed-side end plate and provided with a fixed-side electrode at the end. , A movable side electrode rod arranged coaxially with the fixed side electrode rod and provided with a movable side electrode at the end which can be brought into contact with and separated from the fixed side electrode, and between the movable side electrode rod and the movable side end plate. A vacuum valve provided with an airtightly joined bellows, wherein the fixed side electrode and the movable side electrode are composed of a windmill-shaped electrode, and a fixed side arc diffusion prevention plate provided on the back surface of the fixed side electrode. , The movable side arc diffusion prevention plate provided on the back surface of the movable side electrode, the first engaging portion provided at one or a plurality of places on the inner surface of the insulating container, and the movable side electrode side of the bellows. The bellows cover provided at the end of the case and the outer periphery of the movable side arc diffusion prevention plate having the function of a guide plate are provided so as to be slidable on the inner surface of the insulating container, and the first engagement is performed. A vacuum valve characterized by having a seventh engaging portion that engages with the portion. The vacuum valve according to claim 9, wherein the bellows cover is slidably provided on the inner surface of the insulating container and has a third engaging portion that engages with the first engaging portion. It said first engaging portion is a convex portion, the vacuum valve according to claim 9 or claim 10 prior Symbol seventh engagement portion, characterized in that a recess. The first Kakarigobu is polygonal surface, a vacuum valve according to claim 9 or claim 10 prior Symbol seventh Kakarigobu is characterized by a polygonal shape body. An insulating container whose inside is closed by a fixed-side end plate and a movable-side end plate joined to both ends, and a fixed-side electrode rod fixed to the fixed-side end plate and provided with a fixed-side electrode at the end. , A movable side electrode rod arranged coaxially with the fixed side electrode rod and provided with a movable side electrode at the end which can be brought into contact with and separated from the fixed side electrode, and between the movable side electrode rod and the movable side end plate. A vacuum valve provided with an airtightly joined bellows, a first engaging portion provided at one or a plurality of locations on the inner surface of the insulating container, and an end portion of the bellows on the movable side electrode side. With a bellows cover slidably provided on the inner surface of the insulating container, having a thickness capable of suppressing the inclination of the movable side electrode rod, and having an eighth engaging portion that engages with the first engaging portion. A vacuum valve characterized by being equipped with. The vacuum valve according to claim 13, wherein the first engaging portion is a convex portion and the eighth engaging portion is a concave portion. The vacuum valve according to claim 13, wherein the first engaging portion is a polygonal surface, and the eighth engaging portion is a polygonal body. The vacuum valve according to any one of claims 1 to 15, wherein the bellows cover is made of metal, and only the outer peripheral portion that slides with the inner circumference of the insulating container is made of an insulator. .. The vacuum valve according to any one of claims 1 to 15, wherein the bellows cover is made of an insulator. The vacuum valve according to any one of claims 1 to 12, wherein the guide plate is made of metal, and only the outer peripheral portion that slides with the inner circumference of the insulating container is made of an insulator. .. The vacuum valve according to any one of claims 1 to 12, wherein the guide plate is made of an insulator.

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