JP3708735B2 - Vacuum valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vacuum valve used in a vacuum switch that opens and closes a current flowing in a circuit by contact and separation of contacts in a vacuum, and more particularly to a vacuum valve that can be miniaturized.
[0002]
[Prior art]
Conventionally, a vacuum switch has been often used as one of electric switches. The vacuum switch is a general term for a vacuum circuit breaker, a vacuum switch, a vacuum contactor, a vacuum tap changer, a vacuum disconnector, a vacuum fuse, a vacuum relay, and the like.
[0003]
FIG. 15 is a sectional view showing an example of a vacuum valve used in this type of vacuum switch.
[0004]
As shown in FIG. 15, the vacuum valve has an airtight structure in which a cylindrical insulating container 301 and openings at both ends thereof are covered with an upper lid 302 and a lower lid 303. These insulating container 301, upper lid 302, lower lid The space covered with 303 is maintained at a high vacuum. In addition, a pair of opposed electrodes 304 and 305 are arranged in this space and led out of the upper lid 302 via a fixed shaft 306 that supports the electrode 304, and a movable shaft 307 that supports the electrode 305 is interposed via a bellows 308. It is led out of the tongue cover 03. Further, these electrodes 304 and 305 open and close the current flowing in the circuit by the movable shaft 307 being driven in the vertical direction in the figure by an operation from outside the vacuum valve, and the contact of the electrode end contacting and separating.
[0005]
By the way, in such a vacuum valve, various electrode structures are employed in order to cut off a large current.
[0006]
FIG. 16 is a diagram showing an example of this electrode structure.
[0007]
In FIG. 16, the electrodes 304 and 305 facing each other are in an open state, and an arc 313 is formed between the contacts 311 and 312 at the electrode ends.
[0008]
Between the contacts 311 and 312, the fixed shaft 306 and the movable shaft 307, cup electrodes 314 and 315 constitute an energization unit. The cup electrodes 314 and 315 have a concave cross section, and a contact is connected to the opening side, and a fixed shaft 306 and a movable shaft 307 are connected to the closing side. In addition, slits 316 are arbitrarily provided on the side surfaces of the cup electrodes 314 and 315.
[0009]
In this state, when an electric current flows through the vacuum valve and an arc 313 is formed between the contacts 311 and 312, the electric current flowing along the slits 316 of the cup electrodes 314 and 315 causes the arc 313 to be perpendicular to the arc column and circular. A circumferential force is applied, and the arc 313 is rotationally driven between the contacts 311 and 312 so that the arc is not stagnated. Thereby, the local heating of the contacts 311 and 312 by the arc 313 is suppressed, and damage to the contacts is suppressed.
[0010]
Accordingly, with such an electrode structure, it is possible to withstand the generation of a larger current arc and to interrupt a large current.
[0011]
[Problems to be solved by the invention]
However, in the conventional vacuum valve having the electrode structure as described above, since the breaking current density per unit area of the electrode is relatively small, the electrode is large, and as a result, the outer tube diameter of the vacuum valve is large. Thus, there is a problem in terms of downsizing of the vacuum valve.
[0012]
An object of the present invention is to reduce the size of the electrode by improving the interrupting current density per unit area of the electrode, thereby reducing the outer diameter of the vacuum valve body and reducing the size of the vacuum valve body. The object is to provide a vacuum valve capable of this.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the vacuum valve of the invention of claim 1 is a copper body.outsideOne end of the cylinder is covered with the bottom of the copper body, and the other end has a hole in the center.Has multiple slitsDisc contacts are joined,outsideCylindrical body oroutsideA slit having an oblique angle with respect to the bottom surface from the cylindrical body to the bottom of the copper bodyMultipleFurther providedoutsideThe inside of the cylinderoutsideOf copper body coaxial with cylindrical bodyinsideA cylindrical body is disposed between the bottom of the copper body and the contact, and the inner cylindrical body has a slit having an oblique angle with respect to the bottom surface.As many as the number of slits formed in the contact pointA first electrode having a provided structure, and a first electrode having a structure substantially similar to the first electrode, wherein the angle of the slit provided obliquely with respect to the bottom surface is approximately 180 °. A second electrode having a structure in which the angle of the slit is reduced is disposed opposite to the inside of the vacuum vessel.
[0014]
  Therefore, in the vacuum valve according to the first aspect of the present invention, the first electrode and the second electrode having the above-described structure are disposed opposite to each other in the vacuum vessel, so that the arc driving force is increased and shut off. Performance can be improved.In the vacuum valve according to the first aspect of the present invention, by making the number of slits of the contacts the same as the number of slits of the inner cylindrical body, it is possible to increase the arc driving force and further improve the interruption performance. Furthermore, in the vacuum valve according to the first aspect of the present invention, the contact slit of the contact slit and the slit of the inner cylindrical body intersect each other, thereby increasing the arc driving force and further improving the interruption performance. be able to.
[0015]
  The vacuum valve of the invention of claim 2 is made of a copper body.outsideOne end of the cylinder is covered with the bottom of the copper body, and the other end has a hole in the center.Has multiple slitsDisc contacts are joined,outsideCylindrical body oroutsideA slit having an oblique angle with respect to the bottom surface from the cylindrical body to the bottom of the copper bodyMultipleFurther providedoutsideThe inside of the cylinderoutsideOf copper body coaxial with cylindrical bodyinsideThe cylindrical body and one end of the cylindrical body are covered with the inner copper body bottom, and the contact is joined to the other end. The inner cylindrical body or the inner cylindrical body to the inner copper body bottom with respect to the bottom surface Slits with an oblique angleAs many as the number of slits formed in the contact pointA first electrode having a provided structure, and a first electrode having a structure substantially similar to the first electrode, wherein the angle of the slit provided obliquely with respect to the bottom surface is approximately 180 °. A second electrode having a structure in which the angle of the slit is reduced is disposed opposite to the inside of the vacuum vessel.
[0016]
  Therefore, in the vacuum valve according to the second aspect of the present invention, the first electrode and the second electrode having the above-described structure are disposed opposite to each other in the vacuum vessel, so that the arc driving force is increased and shut off. Performance can be improved.In the vacuum valve according to the second aspect of the present invention, by making the number of slits of the contact the same as the number of slits of the inner cylindrical body, it is possible to increase the arc driving force and further improve the interruption performance. Furthermore, in the vacuum valve according to the second aspect of the invention, the contact slit of the contact slit and the slit of the inner cylindrical body intersect each other, thereby increasing the arc driving force and further improving the interruption performance. be able to.
[0033]
  Claims3The vacuum valve of the invention ofA conical hole is formed from the lower bottom of the truncated cone-shaped copper body, a current-carrying shaft is joined to the upper bottom, and a disk-shaped contact having a plurality of slits having a hole in the center at the lower bottom. In addition, a plurality of slits having an oblique angle with respect to the upper bottom surface are provided on the side surface of the truncated cone-shaped copper body, and the number of slits formed in the contact is the same as the number of slits. The first electrode in which the slit provided in the contact and the slit in the contact surface of the slit provided in the inner cylindrical body intersect each other, and the structure substantially the same as the first electrode And a second electrode having a structure in which the angle of the slit provided obliquely with respect to the upper bottom surface is reduced from about 180 ° to the angle of the slit of the first electrode is opposed to the inside of the vacuum vessel. Arranged.
[0034]
  Therefore, the claims3In the vacuum valve of the present invention, the first electrode and the second electrode having the above structure are disposed opposite to each other in the vacuum vessel, thereby increasing the arc driving force and improving the interruption performance. Can do.In the vacuum valve according to the third aspect of the invention, by setting the number of contact slits to be the same as the number of slits of the inner cylindrical body, it is possible to increase the arc driving force and further improve the interruption performance. Furthermore, in the vacuum valve of the invention according to claim 3, by making the contact slit of the contact slit and the slit of the inner cylindrical body intersect with each other, the arc driving force is increased and the interruption performance is further improved. be able to.
[0043]
  Meanwhile, claims4The vacuum valve of the invention ofOne end of the copper body is covered with the bottom of the copper body, and the other end is joined to a disk-shaped contact having a hole in the center, and the copper body or the cylinder is connected to the copper body. A first electrode having a structure in which a slit having an oblique angle with respect to the bottom surface is provided over the bottom, and an angle formed with the bottom surface of the slit varies in an intermediate portion of the cylindrical body; and the first electrode, Second electrode having substantially the same structure and having a structure in which the angle of each slit provided obliquely with respect to the bottom surface is reduced from approximately 180 ° to the angle of the opposing slit of the first electrode Are arranged opposite to each other in the vacuum vessel..
[0044]
  Therefore, the claims4In the vacuum valve of the present invention, the first electrode and the second electrode having the above structure are arranged opposite to each other in the vacuum vessel, thereby increasing the arc driving force and further improving the shut-off performance. Can be made.
[0045]
  Claims5The vacuum valve of the present invention is the above-mentioned claim.4In the vacuum valve of the invention, the angle α formed with the bottom surface of the slit located on the contact bonding side₁And the angle α between the bottom surface of the slit located on the bottom side of the copper body₂But α₁<Α₂To satisfy the relationship.
[0046]
  Therefore, the claims5In the vacuum valve of the invention, the angle α formed with the bottom surface of the slit on the contact bonding side₁Angle α with the bottom surface of the slit on the bottom side of the copper body₂By making it smaller than this, the driving force of the arc can be increased and the interruption performance can be further improved.
[0049]
  Meanwhile, claims6In the vacuum valve of the invention, one end of the copper body is covered with the bottom of the copper body, and the other end is joined with a disk-shaped contact with a hole in the center, and the cylinder or A slit having an oblique angle with respect to the bottom surface is provided from the cylindrical body to the bottom of the copper body, and an inner cylindrical body of a copper body coaxial with the cylindrical body is provided between the bottom of the copper body and the contact point. A first electrode having a structure in which a slit having an oblique angle with respect to the bottom surface is provided in the inner cylindrical body, and the height of the outer cylindrical body is smaller than the height of the inner cylindrical body; A second electrode having a structure substantially the same as that of the first electrode and having a structure in which the angle of the slit provided obliquely with respect to the bottom surface is reduced from about 180 ° to the angle of the slit of the first electrode, It is arranged to face the inside of the container.
[0050]
  Therefore, the claims6In the vacuum valve of the present invention, the first electrode and the second electrode having the above structure are disposed opposite to each other in the vacuum vessel, thereby increasing the arc driving force and improving the interruption performance. Can do.
[0051]
As a result, the cut-off current density per unit area of the electrode can be improved to reduce the size of the electrode, thereby reducing the outer diameter of the vacuum valve body and reducing the size of the vacuum valve body. It becomes.
[0052]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0053]
In the following embodiments, the same parts as those in FIGS. 15 and 16 are denoted by the same reference numerals, and the description thereof is omitted. Only different parts will be described here.
[0054]
(First embodiment: corresponding to claim 1)
FIG. 1 is a cross-sectional view showing a configuration example of an electrode in the vacuum valve according to the present embodiment, and corresponds to the electrode 305 in FIG.
[0055]
Further, the opposing electrode 304 is provided with the slits 2 and 4 of FIG. 15 in an arbitrary manner, and other configurations are the same as those of the electrode 305.
[0056]
On the other hand, a substantially flat contact 312 having a hole in the substantially central part is connected to the open end side of the cylindrical cup electrode 315 whose periphery is covered with the bottom.
[0057]
A plurality of slits 316 are provided on the circumferential side surface of the cup electrode 315 and further on the bottom.
[0058]
Further, the inner copper body 2 is arranged coaxially with the side surface of the cup electrode 315 between the bottom of the cup electrode 315 and the contact.
[0059]
Furthermore, a plurality of slits 2 are provided on the side surface and further on the bottom of the inner copper body 1.
[0060]
In the vacuum valve provided with the electrode of the present embodiment configured as described above, as shown in FIG. 1, the arc current generated between the opposing contacts 312 is the current flowing along the slit 316 and the slit 2. Synthesized by the current flowing along. An electromagnetic force acts on the arc by the magnetic field generated by each of these currents in a direction perpendicular to the arc column.
[0061]
Therefore, when the arc approaches the center side of the contact 312, the driving force due to the current flowing along the slit 2 acts on the arc, and when the arc approaches the outside of the contact 312, the driving due to the current flowing along the slit 316 occurs. Force acts on the arc. Thereby, even if the arc is ignited inside and outside the contact 312, the driving force of the arc is obtained, the local heating of the arc is suppressed, and the interruption performance up to a large current region is ensured.
[0062]
As described above, in the vacuum valve according to the present embodiment, the two electrodes 304 and 305 having the above-described structure are disposed opposite to each other in the vacuum vessel. It becomes possible to improve.
[0063]
As a result, the cut-off current density per unit area of the electrode can be improved to reduce the size of the electrode, and the vacuum tube can be reduced in size by reducing the outer diameter of the vacuum valve.
[0064]
(Second embodiment: corresponding to claim 2)
FIG. 2 is a cross-sectional view showing a configuration example of the electrode in the vacuum valve according to the present embodiment, and corresponds to the electrode 305 in FIG.
[0065]
Further, the opposing electrode 304 is provided with the slits 2 and 4 in FIG. 15 in an arbitrary manner, and other configurations are the same as described above.
[0066]
On the other hand, a substantially flat contact 312 having a hole in the substantially central part is connected to the open end side of the cylindrical cup electrode 315 whose periphery is covered with the bottom.
[0067]
A plurality of slits 316 are provided on the circumferential side surface of the cup electrode 315 and further on the bottom.
[0068]
In the vacuum valve provided with the electrode of the present embodiment configured as described above, as shown in FIG. 1, the arc current generated between the opposing contacts 312 is the current flowing along the slit 316 and the slit 2. Synthesized by the current flowing along. An electromagnetic force acts on the arc by the magnetic field generated by each of these currents in a direction perpendicular to the arc column.
[0069]
Therefore, when the arc approaches the center side of the contact 312, the driving force due to the current flowing along the slit 2 acts on the arc, and when the arc approaches the outside of the contact 312, the driving due to the current flowing along the slit 316 occurs. Force acts on the arc. Thereby, even if the arc is ignited inside and outside the contact 312, the driving force of the arc is obtained, the local heating of the arc is suppressed, and the interruption performance up to a large current region is ensured.
[0070]
Moreover, in this Embodiment, the slit process of the inner copper body 1 and the cup electrode 315 can be performed separately.
[0071]
As described above, in the vacuum valve according to the present embodiment, the two electrodes 304 and 305 having the above-described structure are disposed opposite to each other in the vacuum vessel. It becomes possible to improve.
[0072]
As a result, the cut-off current density per unit area of the electrode can be improved to reduce the size of the electrode, and the vacuum tube can be reduced in size by reducing the outer diameter of the vacuum valve.
[0073]
(Third embodiment: corresponding to claim 3)
The vacuum valve according to the present embodiment is the side surface of the external cup electrode 315 in the first embodiment or the second embodiment described above (here, the first embodiment in FIG. 1 is substituted). The number of slits 316 provided in the inner copper body 1 is the same as the number of slits 2 provided in the inner copper body 1.
[0074]
In the vacuum valve having the electrode of the present embodiment configured as described above, the number of the slits 316 of the external cup electrode 315 and the number of the slits 2 of the inner copper body 1 is the same, so that the arc driving force is reduced. It is possible to further improve the blocking performance.
[0075]
In the present embodiment, the slits can be processed after the inner copper body 1 and the cup electrode 315 are integrated.
[0076]
As described above, in the vacuum valve according to the present embodiment, the number of slits 316 of the external cup electrode 315 and the number of slits 2 of the inner copper body 1 are the same, so that the arc driving force is increased to further improve the shut-off performance. It becomes possible to improve.
[0077]
(Fourth embodiment: corresponding to claim 4)
FIG. 3 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0078]
That is, the vacuum valve according to the present embodiment is provided in the inner copper body 1 and the slit 316 provided on the side surface of the external cup electrode 315 as shown in FIG. 3 in the third embodiment described above. The slits 2 are arranged on the same plane so as to overlap each other.
[0079]
In the vacuum valve provided with the electrode of the present embodiment configured as described above, by arranging the slit 316 of the external cup electrode 315 and the slit 2 of the inner copper body 1 on the same plane, The interruption performance can be further improved by increasing the driving force of the arc.
[0080]
As described above, in the vacuum valve of the present embodiment, the slit 316 of the external cup electrode 315 and the slit 2 of the inner copper body 1 are arranged on the same plane. It is possible to further improve the blocking performance.
[0081]
(Fifth embodiment: corresponding to claim 5)
FIG. 4 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0082]
That is, in the vacuum valve according to the present embodiment, the angle β formed by the slit 316 provided in the cup electrode 315 and the bottom surface as shown in FIG. 4 in the first embodiment or the second embodiment described above. The angle α formed by the slit 2 provided on the inner copper body 1 with the bottom surface satisfies the relationship α <β, in other words, the angle β formed by the slit 316 provided on the cup electrode 315 with the bottom surface. On the other hand, the angle α formed by the slit 2 provided in the inner copper body 1 with the bottom surface is an acute angle.
[0083]
In the vacuum valve having the electrode of the present embodiment configured as described above, the angle α formed by the slit 2 of the inner copper body 1 with the bottom surface is set to the angle β formed by the slit 316 of the cup electrode 315 with the bottom surface. By setting it to an acute angle (decreasing), the driving force to the arc by the current flowing through the slit 2 of the inner copper body 1 can be increased, and the interruption performance can be further improved.
[0084]
As described above, in the vacuum valve of the present embodiment, the angle α formed by the slit 2 of the inner copper body 1 with the bottom surface is an acute angle with respect to the angle β formed by the slit 316 of the cup electrode 315. It is possible to further improve the blocking performance by increasing the driving force.
[0085]
(Sixth embodiment: corresponding to claim 6)
FIG. 5 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0086]
In other words, the vacuum valve according to the present embodiment is connected to the external cup electrode 315 in the first embodiment, the second embodiment, or the fifth embodiment as shown in FIG. The number No of the slits 316 provided and the number Ni of the slits 2 provided in the inner copper body 1 satisfy the relationship No> Ni.
[0087]
In the vacuum valve provided with the electrode of the present embodiment configured as described above, the number No of slits 316 of the cup electrode 315 is larger than the number Ni of slits 2 of the inner copper body 1, The interruption performance can be further improved by increasing the driving force of the arc.
[0088]
That is, in the present embodiment, when the diameter of the cup electrode 315 is increased, the interval between the slits 316 is widened, and the driving force is reduced when the arc is ignited in the middle portion thereof, by increasing the number of slits 316. A decrease in driving force can be suppressed.
[0089]
As described above, in the vacuum valve of the present embodiment, the number No of slits 316 of the cup electrode 315 is made larger than the number Ni of the slits 2 of the inner copper body 1, so that the arc driving force is increased. It is possible to further improve the blocking performance.
[0090]
(Seventh embodiment: corresponding to claim 7)
The vacuum valve according to the present embodiment is the same as that of the sixth embodiment described above, in particular, the number of slits 316 provided on the side surface of the external cup electrode 315 and the number of slits 2 provided in the inner copper body 1. Ni satisfies the relationship No = 2 × Ni.
[0091]
In the vacuum valve provided with the electrode of the present embodiment configured as described above, the number No. of slits 316 of the cup electrode 315 is increased to twice the number Ni of slits 2 of the inner copper body 1. Thus, the arc driving force can be increased to further improve the interruption performance.
[0092]
In other words, in the present embodiment, when the diameter of the cup electrode 315 is increased, the interval between the slits 316 is widened, and the driving force is reduced when the arc is ignited in the middle thereof. Accordingly, it is possible to suppress a decrease in driving force.
[0093]
As described above, in the vacuum valve according to the present embodiment, the number No of slits 316 of the cup electrode 315 is twice the number Ni of the slits 2 of the inner copper body 1. It becomes possible to further improve the blocking performance.
[0094]
(Eighth embodiment: corresponding to claim 8)
FIG. 6 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0095]
That is, the vacuum valve according to the present embodiment is different from the seventh embodiment described above in particular with the slit 316 provided in the external cup electrode 315 and the slit provided in the inner copper body 1 as shown in FIG. 2 are arranged so as to be located on the same plane at intervals of one.
[0096]
In the vacuum valve provided with the electrode of the present embodiment configured as described above, the slit 316 of the external cup electrode 315 and the slit 2 of the inner copper body 1 are arranged on the same plane at every interval. As a result, the arc driving force can be increased to further improve the interruption performance.
[0097]
In other words, in the present embodiment, when the diameter of the cup electrode 315 is increased, the interval between the slits 316 is widened, and the driving force is reduced when the arc is ignited in the middle thereof. Accordingly, it is possible to suppress a decrease in driving force.
[0098]
As described above, in the vacuum valve of the present embodiment, since the slits 316 of the cup electrode 315 and the slits 2 of the inner copper body 1 are arranged on the same plane, the arc driving force is increased. Thus, it becomes possible to further improve the shut-off performance.
[0099]
(Ninth embodiment: corresponding to claim 9)
FIG. 7 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0100]
That is, the vacuum valve according to the present embodiment is a copper body constituting the side surface of the external cup electrode 315 as shown in FIG. 7 in any of the first to eighth embodiments described above. Thickness t₁And the thickness t of the inner copper body 1₂But t₁> T₂To satisfy the relationship.
[0101]
In the vacuum valve having the electrode of the present embodiment configured as described above, the thickness t of the copper body of the cup electrode 315₁, The thickness t of the inner copper body 1₂By making it thicker, the driving force of the arc can be increased to further improve the interruption performance.
[0102]
That is, as shown in FIG. 7, the resistance from the bottom of the inner copper body 1 to the contact 312 and the resistance from the bottom of the inner copper body 1 to the contact 312 of the cup electrode 315 are t₂And t₁The current flowing through each can be controlled by adjusting the thickness. The arc current generated between the opposing contacts 312 is combined with the current flowing along the slit 316 and the current flowing along the slit 2. An electromagnetic force acts on the arc by the magnetic field generated by each of these currents in a direction perpendicular to the arc column.
[0103]
Therefore, when the arc approaches the center side of the contact 312, the driving force due to the current flowing along the slit 2 acts on the arc, and when the arc approaches the outside of the contact 312, the driving due to the current flowing along the slit 316 occurs. Force acts on the arc. Thereby, even if the arc is ignited inside and outside the contact 312, the driving force of the arc is obtained, the local heating of the arc is suppressed, and the interruption performance up to a large current region is ensured.
[0104]
As described above, in the vacuum valve of the present embodiment, the thickness t of the copper body of the cup electrode 315₁, The thickness t of the inner copper body 1₂Since the thickness is made thicker, it becomes possible to further improve the interruption performance by increasing the driving force of the arc.
[0105]
(Tenth embodiment: corresponding to claim 10)
FIG. 8 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0106]
That is, as shown in FIG. 8, the vacuum valve according to the present embodiment is provided by cutting the groove 3 from above in the copper body portion constituting the side surface of the external cup electrode 315. Further, the slit 316 provides the entire cup electrode 315 in a lump.
[0107]
In the vacuum valve provided with the electrode of the present embodiment configured as described above, the groove 3 is provided coaxially from the contact surface 312 joint surface side of the cup electrode 315, as shown in FIG. The copper body 1 is formed, and a current-carrying portion below the electrode can be formed by a series of machining. The arc current generated between the opposing contacts 312 is combined with the current flowing along the slit 316 and the current flowing along the slit 2. An electromagnetic force acts on the arc by the magnetic field generated by each of these currents in a direction perpendicular to the arc column.
[0108]
From this, when the arc approaches the center side of the contact 312, the driving force due to the current flowing along the slit 2 acts on the arc, and when approaching the outside measurement of the contact 312, it depends on the current flowing along the slit 316. A driving force acts on the arc. Thereby, even if the arc is ignited inside and outside the contact 312, the driving force of the arc is obtained, the local heating of the arc is suppressed, and the interruption performance up to a large current region is ensured.
[0109]
As described above, in the vacuum valve of the present embodiment, the groove 3 is provided in the copper body portion of the cup electrode 315, and the slit 316 is provided in the entire cup electrode 315, so that the arc driving force is increased. It is possible to improve the blocking performance.
[0110]
(Eleventh embodiment: corresponding to claim 11)
FIG. 9 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0111]
That is, as shown in FIG. 9, the vacuum valve according to the present embodiment has an approximately truncated cone shape as a whole by inclining the copper body portion constituting the side surface of the external cup electrode 315. A slit 316 is provided in the copper body portion.
[0112]
In the vacuum valve having the electrode of the present embodiment configured as described above, as shown in FIG. 9, the external cup electrode 315 is formed in the shape of a truncated cone, so that the slit 316 close to the contact 312 is formed. The driving force to the arc due to the current flowing along is increased.
[0113]
Thereby, even if the arc is ignited inside and outside the contact 312, the driving force of the arc is obtained, the local heating of the arc is suppressed, and the interruption performance up to a large current region is ensured.
[0114]
As described above, in the vacuum valve of the present embodiment, the copper body portion of the cup electrode 315 is inclined to form a truncated cone, and the slit 316 is provided in the copper body portion, so that the driving force of the arc is increased. It is possible to improve the blocking performance.
[0115]
(Twelfth embodiment: corresponding to claim 12)
FIG. 10 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0116]
That is, the vacuum valve according to the present embodiment is an inner copper located inside the external cup electrode 315 as shown in FIG. 10 in any of the first to tenth embodiments described above. The body 1 has a substantially truncated cone shape, and a slit 2 is provided in the inner copper body 1.
[0117]
In the vacuum valve having the electrode of the present embodiment configured as described above, as shown in FIG. 10, the slit 316 close to the contact 312 is formed by forming the external cup electrode 315 in the shape of a truncated cone. The driving force to the arc due to the current flowing along is increased.
[0118]
Thereby, even if the arc is ignited inside and outside the contact 312, the driving force of the arc is obtained, the local heating of the arc is suppressed, and the interruption performance up to a large current region is ensured.
[0119]
As described above, in the vacuum valve of the present embodiment, the inner copper body 1 of the cup electrode 315 has a truncated cone shape, and the inner copper body 1 is provided with the slit 2. It becomes possible to further improve the blocking performance.
[0120]
(Thirteenth embodiment: corresponding to claims 13 and 14)
FIG. 11 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0121]
That is, the vacuum valve according to the present embodiment is the same as the first embodiment to the twelfth embodiment described above, as shown in FIG. A slit 4 is provided toward the outer periphery of the contact so as to reach the inside of the external cup electrode 315.
[0122]
Further, the number of slits 4 provided in the contact 312 is equal to the number of slits 316 provided in the cup electrode 315.
[0123]
In the vacuum valve having the electrode of the present embodiment configured as described above, as shown in FIG. 11, the contact 312 is provided with slits 4, and the number of the slits 4 of the contact 312 and the slits 316 of the cup electrode 315 are provided. By making the number of the same number, the starting point of the arc can be moved to the outer peripheral side, and the eddy current generated on the surface of the contact 312 can be reduced.
[0124]
Thereby, the driving force of the arc is obtained, the local heating of the arc is suppressed, and the interruption performance up to a large current region is ensured.
[0125]
As described above, in the vacuum valve of the present embodiment, the slits 4 are provided at the contact 312 and the number of the slits 4 of the contact 312 and the number of the slits 316 of the cup electrode 315 are the same. It becomes possible to further improve the blocking performance.
[0126]
(Fourteenth embodiment: corresponding to claim 15)
FIG. 12 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0127]
That is, in the thirteenth embodiment, the vacuum valve according to the present embodiment has a contact point between the slit 4 provided at the contact 312 and the slit 316 provided at the external cup electrode 315 as shown in FIG. Both the slit 4 and the slit 316 intersect with each other at a portion in contact with 316.
[0128]
In the vacuum valve having the electrode of the present embodiment configured as described above, as shown in FIG. 12, the contact 312 is provided with slits 4, and the number of the slits 4 of the contact 312 and the slits 316 of the cup electrode 315 are provided. By making the number of the same number, the starting point of the arc can be moved to the outer peripheral side, and the eddy current generated on the surface of the contact 312 can be reduced.
[0129]
Further, since the slit 4 and the slit 316 intersect each other at the portion where the slit 4 of the contact 312 and the contact 316 of the slit 316 of the cup electrode 315 intersect, the arc moves quickly, and the arc is centered by the pinch effect. Can be prevented from approaching.
[0130]
Thereby, the driving force of the arc is obtained, the local heating of the arc is suppressed, and the interruption performance up to a large current region is ensured.
[0131]
As described above, in the vacuum valve of the present embodiment, the contact 312 is provided with the slits 4, the number of the slits 4 of the contact 312 is the same as the number of the slits 316 of the cup electrode 315, and Since the slits 4 and 316 of the contact point 316 joint surface of the slit 316 of the cup electrode 315 intersect each other, it becomes possible to further improve the interruption performance by increasing the arc driving force.
[0132]
(Fifteenth embodiment: corresponding to claims 16 to 18)
FIG. 13 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0133]
That is, in the vacuum valve according to this embodiment, as shown in FIG. 13, the inclination of the slit 316 provided in the side surface portion of the external cup electrode 315 is changed in the middle of the side surface portion.
[0134]
Further, an angle α formed with the bottom surface of the slit 316 located on the contact 312 joining side₁And the angle α between the bottom surface of the slit 316 located on the bottom side of the copper body 1₂But α₁<Α₂To satisfy the relationship.
[0135]
In the vacuum valve including the electrode of the present embodiment configured as described above, the slit 316 has an acute angle closer to the contact 312 as shown in FIG. Driving force increases.
[0136]
Thereby, the driving force of the arc is obtained, the local heating of the arc is suppressed, and the interruption performance up to a large current region is ensured.
[0137]
As described above, in the vacuum valve of the present embodiment, the angle α formed with the bottom surface portion on the contact 312 bonding side in the slit 316 of the cup electrode 315.₁Angle α with the bottom surface of the copper body 1 bottom side₂Therefore, it is possible to further improve the interruption performance by increasing the arc driving force.
[0138]
(Sixteenth embodiment: corresponding to claim 19)
FIG. 14 is a cross-sectional view showing a configuration example of electrodes in the vacuum valve according to the present embodiment.
[0139]
That is, in the vacuum valve according to the present embodiment, as shown in FIG. 14, the inner copper body 11 is arranged inside the external cup electrode 315 and both are in contact with the contact 312.
[0140]
Further, the slit 316 is provided in the cup electrode 315 and the slit 2 is provided in the inner copper body 11.
[0141]
Further, the height t of the cup electrode 315_ThreeAnd the height t of the inner copper body 11_FourBut t_Three<T_FourTo satisfy the relationship.
[0142]
In the vacuum valve provided with the electrode of the present embodiment configured as described above, as shown in FIG. 14, it is composed of a cup electrode 315 that is a cup-shaped electrode and an inner copper body 11, and the bottom of the cup electrode 315 The driving force that is applied by the current flowing along the slit 316 provided on the arc can be effectively applied to the arc.
[0143]
Thereby, the driving force of the arc is obtained, the local heating of the arc is suppressed, and the interruption performance up to a large current region is ensured.
[0144]
As described above, in the vacuum valve of the present embodiment, the inner copper body 11 is provided inside the cup electrode 315, both are in contact with the contact 312, the slit 316 is provided in the cup electrode 315, and the inner copper body 11 is provided. A slit 2 is provided, and the height t of the cup electrode 315_ThreeThe height t of the inner copper body 11_FourTherefore, it is possible to further improve the interruption performance by increasing the arc driving force.
[0145]
【The invention's effect】
As described above, according to the vacuum valve of the present invention, since the driving force acting in the direction perpendicular to the arc column acts on the arc generated in each part between the contacts, the arc can be driven to rotate at high speed between the contacts. Thus, local heating of the arc can be suppressed, and the interruption performance up to a large current region can be ensured.
[0146]
As a result, the cut-off current density per unit area of the electrode can be improved to reduce the size of the electrode, thereby reducing the outer diameter of the vacuum valve body and reducing the size of the vacuum valve body. It becomes.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of an electrode in a vacuum valve according to the present invention.
FIG. 2 is a cross-sectional view showing a second embodiment of an electrode in a vacuum valve according to the present invention.
FIG. 3 is a cross-sectional view showing third and fourth embodiments of electrodes in a vacuum valve according to the present invention.
FIG. 4 is a sectional view showing a fifth embodiment of an electrode in a vacuum valve according to the present invention.
FIG. 5 is a cross-sectional view showing sixth and seventh embodiments of electrodes in a vacuum valve according to the present invention.
FIG. 6 is a sectional view showing an eighth embodiment of an electrode in a vacuum valve according to the present invention.
FIG. 7 is a sectional view showing a ninth embodiment of an electrode in a vacuum valve according to the present invention.
FIG. 8 is a cross-sectional view showing a tenth embodiment of an electrode in a vacuum valve according to the present invention.
FIG. 9 is a sectional view showing an eleventh embodiment of electrodes in a vacuum valve according to the present invention.
FIG. 10 is a sectional view showing a twelfth embodiment of an electrode in a vacuum valve according to the present invention.
FIG. 11 is a sectional view showing thirteenth and fourteenth embodiments of electrodes in a vacuum valve according to the present invention.
FIG. 12 is a sectional view showing a fifteenth embodiment of electrodes in a vacuum valve according to the present invention.
FIG. 13 is a sectional view showing sixteenth to eighteenth embodiments of electrodes in a vacuum valve according to the present invention.
FIG. 14 is a sectional view showing a nineteenth embodiment of electrodes in a vacuum valve according to the present invention.
FIG. 15 is a cross-sectional view showing an example of a vacuum valve used in a vacuum switch.
FIG. 16 is a diagram showing an example of an electrode structure of a conventional vacuum valve.
[Explanation of symbols]
1 ... inner copper body,
2 ... Slit,
3 ... Groove,
4 ... Slit,
11 ... inner copper body,
301: Insulating container,
302 ... upper lid,
303 ... lower lid,
304 ... Electrode,
305 ... Electrode,
306 ... fixed shaft,
307 ... movable shaft,
308 ... Bellows,
311 ... Contact,
312 ... Contact,
313 ... Arc,
314: Cup electrode,
315 ... Cup electrode,
316 ... Slit.

Claims (6)

With one end of the outer cylinder of the copper body is covered with a copper body bottom, a disk-shaped contact other end has a plurality of slits having a hole approximately at the center is joined, the outer cylinder or a slit having an angle oblique to the bottom surface toward the copper body bottom from the outer side of the cylindrical body is provided a plurality of further said outer cylinder coaxially copper inside said outer cylindrical body An inner cylindrical body is disposed between the bottom of the copper body and the contact, and the inner cylindrical body has a plurality of slits having an oblique angle with respect to the bottom surface and the slit formed in the contact. A first electrode having a structure provided in the same number as the number, and a slit provided in the contact and a slit in a contact bonding surface of the slit provided in the inner cylindrical body intersect each other ; , Almost the same as the first electrode A second electrode having a structure in which the angle of the slit provided obliquely with respect to the bottom surface is reduced from about 180 ° to the angle of the slit of the first electrode, A vacuum valve characterized by being disposed opposite to the vacuum valve. With one end of the outer cylinder of the copper body is covered with a copper body bottom, a disk-shaped contact other end has a plurality of slits having a hole approximately at the center is joined, the outer cylinder or a slit having an angle oblique to the bottom surface toward the copper body bottom from the outer side of the cylindrical body is provided a plurality of further said outer cylinder coaxially copper inside said outer cylindrical body The inner cylindrical body and one end thereof are covered with the inner copper bottom, and the contact is joined to the other end, from the inner cylinder or the inner cylindrical body to the inner copper bottom. A plurality of slits having an oblique angle with respect to the bottom surface and a structure provided in the same number as the number of slits formed in the contact, the slit provided in the contact, and the inner cylinder Su provided on the body A first electrode Tsu preparative contacts joint surface shaped slit was made to intersect with each other, has a substantially similar structure to that of the first electrode, the angle of the slits provided at an angle with respect to said bottom surface And a second electrode having a structure obtained by subtracting the angle of the slit of the first electrode from about 180 °, and disposed opposite to the inside of the vacuum vessel. A conical hole is formed from the lower bottom of the truncated cone-shaped copper body, a current-carrying shaft is joined to the upper bottom, and a disk-shaped contact having a plurality of slits having a hole in the center at the lower bottom. In addition, a plurality of slits having an oblique angle with respect to the upper bottom surface are provided on the side surface of the truncated cone-shaped copper body, and the number of slits formed in the contact is the same as the number of slits. The first electrode in which the slit provided in the contact and the slit in the contact surface of the slit provided in the inner cylindrical body intersect each other, and the structure substantially the same as the first electrode And a second electrode having a structure in which the angle of the slit provided obliquely with respect to the upper bottom surface is reduced from about 180 ° to the angle of the slit of the first electrode is opposed to the inside of the vacuum vessel. True, characterized by being arranged Valve. One end of the copper body is covered with the bottom of the copper body, and the other end is joined to a disk-shaped contact having a hole in the center, and the copper body or the cylinder is connected to the copper body. A first electrode having a structure in which a slit having an oblique angle with respect to the bottom surface is provided over the bottom, and an angle formed with the bottom surface of the slit varies in an intermediate portion of the cylindrical body; and the first electrode, Second electrode having substantially the same structure and having a structure in which the angle of each slit provided obliquely with respect to the bottom surface is reduced from approximately 180 ° to the angle of the opposing slit of the first electrode And a vacuum valve characterized by being arranged opposite to each other in a vacuum vessel. 5. The vacuum valve according to claim 4, wherein an angle α formed with a bottom surface portion of the slit located on the contact bonding side. ₁ And the angle α between the bottom surface of the slit located on the bottom side of the copper body ₂ But, α ₁ <Α ₂ A vacuum valve characterized by satisfying the following relationship. One end of the outer cylindrical body of the copper body is covered with the bottom of the copper body, and the other end is joined to a disk-like contact with a hole in the center, and the cylindrical body or the cylindrical body A slit having an oblique angle with respect to the bottom surface is provided over the bottom of the copper body, and a cylindrical body coaxial with the cylindrical body is disposed inside the cylindrical body between the bottom of the copper body and the contacts. The inner cylindrical body is provided with a slit having an oblique angle with respect to the bottom surface. A first electrode having a structure in which the height of the outer cylindrical body is smaller than the height of the inner cylindrical body, and a structure substantially the same as the first electrode, and provided obliquely with respect to the bottom surface And a second electrode having a structure in which the slit angle of the first electrode is reduced to approximately 180 ° from the angle of the slit of the first electrode. valve.

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